public void Visit(MaterialGeneratorContext context)
{
if (!Enabled)
{
return;
}
// Push overrides of this attributes
context.PushOverrides(Overrides);
// Order is important, as some features are dependent on other
// (For example, Specular can depend on Diffuse in case of Metalness)
// We may be able to describe a dependency system here, but for now, assume
// that it won't change much so it is hardcoded
// If Specular has energy conservative, copy this to the diffuse lambertian model
// TODO: Should we apply it to any Diffuse Model?
var isEnergyConservative = (Specular as MaterialSpecularMapFeature)?.IsEnergyConservative ?? false;
var lambert = DiffuseModel as IEnergyConservativeDiffuseModelFeature;
if (lambert != null)
{
lambert.IsEnergyConservative = isEnergyConservative;
}
// Diffuse - these 2 features are always used as a pair
context.Visit(Diffuse);
if (Diffuse != null)
{
context.Visit(DiffuseModel);
}
// Surface Geometry
context.Visit(Tessellation);
context.Visit(Displacement);
context.Visit(Surface);
context.Visit(MicroSurface);
// Specular - these 2 features are always used as a pair
context.Visit(Specular);
if (Specular != null)
{
context.Visit(SpecularModel);
}
// Misc
context.Visit(Occlusion);
context.Visit(Emissive);
context.Visit(SubsurfaceScattering);
// If hair shading is enabled, ignore the transparency feature to avoid errors during shader compilation.
// Allowing the transparency feature while hair shading is on makes no sense anyway.
if (!(SpecularModel is MaterialSpecularHairModelFeature) &&
!(DiffuseModel is MaterialDiffuseHairModelFeature))
{
context.Visit(Transparency);
}
context.Visit(ClearCoat);
// Pop overrides
context.PopOverrides();
// Only set the cullmode to something
if (context.Step == MaterialGeneratorStep.GenerateShader && CullMode != CullMode.Back)
{
if (context.MaterialPass.CullMode == null)
{
context.MaterialPass.CullMode = CullMode;
}
}
}
