public void Visit(MaterialGeneratorContext context)
{
var alpha = Alpha ?? new ComputeFloat(0.5f);
var tint = Tint ?? new ComputeColor(Color.White);
// Use pre-multiplied alpha to support both additive and alpha blending
var blendDesc = new BlendStateDescription(Blend.One, Blend.InverseSourceAlpha);
context.Material.HasTransparency = true;
context.Parameters.Set(Effect.BlendStateKey, BlendState.NewFake(blendDesc));
var alphaColor = alpha.GenerateShaderSource(context, new MaterialComputeColorKeys(MaterialKeys.DiffuseSpecularAlphaBlendMap, MaterialKeys.DiffuseSpecularAlphaBlendValue, Color.White));
var mixin = new ShaderMixinSource();
mixin.Mixins.Add(new ShaderClassSource("ComputeColorMaterialAlphaBlend"));
mixin.AddComposition("color", alphaColor);
context.SetStream(MaterialShaderStage.Pixel, AlphaBlendStream.Stream, MaterialStreamType.Float2, mixin);
context.SetStream(AlphaBlendColorStream.Stream, tint, MaterialKeys.AlphaBlendColorMap, MaterialKeys.AlphaBlendColorValue, Color.White);
if (!context.Tags.Get(HasFinalCallback))
{
context.Tags.Set(HasFinalCallback, true);
context.AddFinalCallback(MaterialShaderStage.Pixel, AddDiffuseSpecularAlphaBlendColor);
}
}
public override void VisitFeature(MaterialGeneratorContext context)
{
var alpha = Alpha ?? new ComputeFloat(1f);
var tint = Tint ?? new ComputeColor(Color.White);
// Use pre-multiplied alpha to support both additive and alpha blending
var blendDesc = new BlendStateDescription(Blend.One, Blend.InverseSourceAlpha);
context.Material.HasTransparency = true;
context.Parameters.Set(Effect.BlendStateKey, BlendState.NewFake(blendDesc));
context.SetStream(AlphaBlendStream.Stream, alpha, MaterialKeys.DiffuseSpecularAlphaBlendMap, MaterialKeys.DiffuseSpecularAlphaBlendValue, Color.White);
context.SetStream(AlphaBlendColorStream.Stream, tint, MaterialKeys.AlphaBlendColorMap, MaterialKeys.AlphaBlendColorValue, Color.White);
if (!context.Tags.Get(HasFinalCallback))
{
context.Tags.Set(HasFinalCallback, true);
context.AddFinalCallback(MaterialShaderStage.Pixel, AddDiffuseSpecularAlphaBlendColor);
}
}
