} = new ComputeColor(new Color4(1.0f, 0.37f, 0.3f, 1.0f)); // Default falloff for skin.
public ShaderSource Generate(MaterialGeneratorContext context)
{
var shaderSource = new ShaderMixinSource();
MaterialComputeColorKeys materialComputeColorKeys = new MaterialComputeColorKeys(FalloffTexture, FalloffValue, DefaultProfileColor);
// Add the shader for computing the transmittance using the custom scattering profile:
if (FalloffMap is ComputeTextureColor ||
FalloffMap is ComputeBinaryColor ||
FalloffMap is ComputeShaderClassColor ||
FalloffMap is ComputeVertexStreamColor)
{
var computeColorSource = FalloffMap.GenerateShaderSource(context, materialComputeColorKeys);
shaderSource.AddComposition("FalloffMap", computeColorSource);
// Use the expensive pixel shader because the scattering falloff can vary per pixel because we're using a texture:
shaderSource.Mixins.Add(new ShaderClassSource("MaterialSubsurfaceScatteringScatteringProfileCustomVarying"));
}
else
{
Vector3 falloff = new Vector3(1.0f);
ComputeColor falloffComputeColor = FalloffMap as ComputeColor;
if (falloffComputeColor != null)
{
falloff.X = falloffComputeColor.Value.R;
falloff.Y = falloffComputeColor.Value.G;
falloff.Z = falloffComputeColor.Value.B;
}
ComputeFloat4 falloffComputeFloat4 = FalloffMap as ComputeFloat4;
if (falloffComputeFloat4 != null)
{
falloff.X = falloffComputeFloat4.Value.X;
falloff.Y = falloffComputeFloat4.Value.Y;
falloff.Z = falloffComputeFloat4.Value.Z;
}
// Use the precomputed pixel shader because the scattering falloff is constant across pixels because we're using a texture:
Vector4[] scatteringProfile = SubsurfaceScatteringKernelGenerator.CalculateTransmittanceProfile(falloff); // Applied during forward pass.
context.MaterialPass.Parameters.Set(MaterialSubsurfaceScatteringScatteringProfileCustomUniformKeys.ScatteringProfile, scatteringProfile);
shaderSource.Mixins.Add(new ShaderClassSource("MaterialSubsurfaceScatteringScatteringProfileCustomUniform"));
}
return(shaderSource);
}
} = new Color3(0.48f, 0.41f, 0.28f); // Default strength for skin.
public Vector4[] Generate()
{
return(SubsurfaceScatteringKernelGenerator.CalculateScatteringKernel(SubsurfaceScatteringSettings.SamplesPerScatteringKernel2,
Strength, Falloff));
}
