data/Packages/com.unity.render-pipelines.universal/Editor/VFXGraph/Shaders/VFXVertexProbeSampling.template

${VFXBegin:VFXVertexProbeDeclareVaryings}
//Store a compacted version of the contributions in the six directions (3xfloat4)
#if defined(PROBE_VOLUMES_L1) || defined(PROBE_VOLUMES_L2)
#define INDIRECT_INTERPOLATION
#else
#define INDIRECT_INTERPOLATION nointerpolation
#endif

INDIRECT_INTERPOLATION float4 bakeDiffuseLighting[3] : BAKEDIFFUSE0;
${VFXEnd}

${VFXBegin:VFXVertexProbeVaryingsMacros}
#define VFX_VARYING_BAKE_DIFFUSE_LIGHTING bakeDiffuseLighting
${VFXEnd}

${VFXBegin:VFXVertexProbeFillVaryings}
#if VFX_MATERIAL_TYPE_SIX_WAY_SMOKE
   EvaluateProbesSixWay(o);
#endif
${VFXEnd}

${VFXBegin:VFXVertexProbeDeclareFunctions}
#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/SixWayLighting.hlsl"

void EvaluateProbesSixWay(inout VFX_VARYING_PS_INPUTS input)
{
    float3 positionWS = GetAbsolutePositionWS(input.VFX_VARYING_POSWS);
    float3 normalWS = input.VFX_VARYING_NORMAL.xyz;
    float3 tangentWS = input.VFX_VARYING_TANGENT.xyz;

    GatherDiffuseGIData(positionWS, normalWS, tangentWS, input.VFX_VARYING_BAKE_DIFFUSE_LIGHTING[0],
                                                         input.VFX_VARYING_BAKE_DIFFUSE_LIGHTING[1],
                                                         input.VFX_VARYING_BAKE_DIFFUSE_LIGHTING[2]);
}

${VFXEnd}