materials/vMaterials_2/Paint/Paint_Gun_Metal.mdl

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mdl 1.4;
import ::df::*;
import ::base::*;
import ::anno::*;
import ::nvidia::core_definitions::dimension;

const string COPYRIGHT = 
" Copyright 2024 NVIDIA Corporation. All rights reserved.\n"
" MDL MATERIALS ARE PROVIDED PURSUANT TO AN END USER LICENSE  AGREEMENT,\n"
" WHICH WAS ACCEPTED IN ORDER TO GAIN ACCESS TO THIS FILE.  IN PARTICULAR,\n" 
" THE MDL MATERIALS ARE PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND,\n"
" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF\n"
" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF\n" 
" COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL NVIDIA\n"
" CORPORATION BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, INCLUDING ANY\n"
" GENERAL, SPECIAL,  INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, WHETHER IN\n"
" AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF THE USE OR\n"
" INABILITY TO USE THE MDL MATERIALS OR FROM OTHER DEALINGS IN THE MDL MATERIALS.\n";


// remaps a 0...1 value to lie between min and max
float remap(float x, float min, float max)
{
	return min + x * (max - min);
}


export material Paint_Gun_Metal (
    uniform color base_color  = color(0.08) 
    [[ 
        ::anno::display_name("Base color"),
        ::anno::description("The base color of the material."),
		::anno::in_group("Appearance")
    ]],
    uniform float flake_amount        = .25         
    [[ 
        ::anno::display_name("Flake Amount"),
        ::anno::soft_range(0.0, 1.0),
        ::anno::description("The amount of metal flakes in the material."),
		::anno::in_group("Appearance")
    ]],
    uniform float particle_size = .1           
    [[ 
        ::anno::display_name("Particle Size"), 
        ::anno::soft_range(0.0, 1.0),
        ::anno::description("The size of the particles in millimeters. If the paticles don't appear "
		"at all, check whether you are using the correct units in yout scene. The materials is built to "
		"use meters as scene unit."),
		::anno::in_group("Appearance")
    ]],
	uniform float3 texture_scale = float3(1.0f)
	[[
		::anno::hidden(),
		::anno::display_name("Scale"),
		::anno::description("An additional linear controller for controlling the dimension."),
		::anno::in_group("Flakes Layer"),
		::nvidia::core_definitions::dimension(float3(1.0f, 1.0f, 1.0f))
	]]
) [[ 
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal Paint"),
    ::anno::description("Gun metal material."),
	::anno::key_words(string[]("design", "metal", "gunmetal", "flakes", "effect", "paint", "car", "rim", "new", "automotive", "wheel", "matte")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal.png"),
    ::anno::copyright_notice(COPYRIGHT),
	::anno::hidden()
]] = let
{
    color flake_color               = color(1,1,1);
    float flake_intensity           = .8;
    float flake_roughness           = .3;
    float flake_bumpiness           = .25;
	
	// Scaling the particle size parameters to give the right average size of
	// the particles in the render
	uniform float flake_scale  = particle_size * 0.0008;
	
	float flake_amount_2 = remap(flake_amount, 0.2, 0.6);
    
    ::base::texture_coordinate_info uvw = ::base::coordinate_source(coordinate_system: ::base::texture_coordinate_object);
	
	::base::texture_coordinate_info transformed_uvw = 
								::base::transform_coordinate(
									transform: ::base::rotation_translation_scale(
												rotation: float3(0.0f),
												translation: float3(0.0f),
												scaling: texture_scale
									),
									coordinate: uvw
	);

    bsdf flake         = ::df::simple_glossy_bsdf(
                            roughness_u: flake_roughness,
                            tint: flake_color
    );
    
    bsdf base          = ::df::diffuse_reflection_bsdf (
                            tint: base_color * 0.2
    );
    
    float3 flake_bump  = ::base::flake_noise_bump_texture( 
                            uvw:         transformed_uvw,
                            strength:    flake_bumpiness,
                            scale:       particle_size*flake_scale
    );
    
    float flake_weight = ::base::flake_noise_texture( 
                            uvw:         transformed_uvw,
                            intensity:   flake_intensity,
                            scale:       particle_size*flake_scale,
                            density:     flake_amount_2
    ).mono;
    
} in material (
    surface: material_surface (
        scattering: ::df::weighted_layer(
                weight: flake_weight,
                normal: flake_bump,
                layer: flake,    
                base: base
        )
    )
);


export material Paint_Gun_Metal_Black_0(*)
[[
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal - Black 0"),
    ::anno::description("A black gun metal effect paint."),
	::anno::key_words(string[]("design", "metal", "paint", "flakes", "effect", "car", "automotive", "rim", "wheel", "spraypaint", "shiny", "black")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal_Black_0.png"),
    ::anno::copyright_notice(COPYRIGHT)
]] = Paint_Gun_Metal(
	base_color: color(0.08),
	flake_amount: 0.0f,
	particle_size: .15
);


export material Paint_Gun_Metal_Black_25(*)
[[
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal - Black 25"),
    ::anno::description("A black gun metal effect paint."),
	::anno::key_words(string[]("design", "metal", "paint", "flakes", "effect", "car", "automotive", "rim", "wheel", "spraypaint", "shiny", "black")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal_Black_25.png"),
    ::anno::copyright_notice(COPYRIGHT)
]] = Paint_Gun_Metal(
	base_color: color(0.08),
	flake_amount: 0.25f,
	particle_size: .15
);



export material Paint_Gun_Metal_Black_50(*)
[[
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal - Black 50"),
    ::anno::description("A black gun metal effect paint."),
	::anno::key_words(string[]("design", "metal", "paint", "flakes", "effect", "car", "automotive", "rim", "wheel", "spraypaint", "shiny", "black")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal_Black_50.png"),
    ::anno::copyright_notice(COPYRIGHT)
]] = Paint_Gun_Metal(
	base_color: color(0.08),
	flake_amount: 0.50f,
	particle_size: .15
);



export material Paint_Gun_Metal_Black_75(*)
[[
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal - Black 75"),
    ::anno::description("A black gun metal effect paint."),
	::anno::key_words(string[]("design", "metal", "paint", "flakes", "effect", "car", "automotive", "rim", "wheel", "spraypaint", "shiny", "black")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal_Black_75.png"),
    ::anno::copyright_notice(COPYRIGHT)
]] = Paint_Gun_Metal(
	base_color: color(0.08),
	flake_amount: 0.75f,
	particle_size: .15
);


export material Paint_Gun_Metal_Gray_0(*)
[[
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal - Gray 0"),
    ::anno::description("A dark gray gun metal paint material."),
	::anno::key_words(string[]("design", "metal", "paint", "flakes", "effect", "car", "automotive", "rim", "wheel", "spraypaint", "shiny", "gray", "dark")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal_Gray_0.png"),
    ::anno::copyright_notice(COPYRIGHT)
]] = Paint_Gun_Metal(
	base_color: color(0.284),
	flake_amount: 0.0f,
	particle_size: .30
);


export material Paint_Gun_Metal_Gray_25(*)
[[
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal - Gray 25"),
    ::anno::description("A dark gray gun metal paint material."),
	::anno::key_words(string[]("design", "metal", "paint", "flakes", "effect", "car", "automotive", "rim", "wheel", "spraypaint", "shiny", "gray", "dark")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal_Gray_25.png"),
    ::anno::copyright_notice(COPYRIGHT)
]] = Paint_Gun_Metal(
	base_color: color(0.284),
	flake_amount: 0.25,
	particle_size: .30
);


export material Paint_Gun_Metal_Gray_50(*)
[[
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal - Gray 50"),
    ::anno::description("A dark gray gun metal paint material."),
	::anno::key_words(string[]("design", "metal", "paint", "flakes", "effect", "car", "automotive", "rim", "wheel", "spraypaint", "shiny", "gray", "dark")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal_Gray_50.png"),
    ::anno::copyright_notice(COPYRIGHT)
]] = Paint_Gun_Metal(
	base_color: color(0.284),
	flake_amount: 0.50,
	particle_size: .30
);


export material Paint_Gun_Metal_Gray_75(*)
[[
	::anno::author("NVIDIA vMaterials"),
    ::anno::display_name("Gun Metal - Gray 75"),
    ::anno::description("A dark gray gun metal paint material."),
	::anno::key_words(string[]("design", "metal", "paint", "flakes", "effect", "car", "automotive", "rim", "wheel", "spraypaint", "shiny", "gray", "dark")),
	::anno::thumbnail("./.thumbs/Paint_Gun_Metal.Paint_Gun_Metal_Gray_75.png"),
    ::anno::copyright_notice(COPYRIGHT)
]] = Paint_Gun_Metal(
	base_color: color(0.284),
	flake_amount: 0.75,
	particle_size: .30
);