public override void VisitFeature(MaterialGeneratorContext context)
{
// determine if an tessellation material have already been added in another layer
HasAlreadyTessellationFeature = context.GetStreamFinalModifier <MaterialTessellationBaseFeature>(MaterialShaderStage.Domain) != null;
// Notify problem on multiple tessellation techniques and return
if (HasAlreadyTessellationFeature)
{
context.Log.Warning("A material cannot have more than one layer performing tessellation. The first tessellation method found, will be used.");
return;
}
// reset the tessellation stream at the beginning of the stage
context.AddStreamInitializer(MaterialShaderStage.Domain, "MaterialTessellationStream");
// set the desired triangle size desired for this material
context.Parameters.Set(TessellationKeys.DesiredTriangleSize, TriangleSize);
// set the tessellation method and callback to add Displacement/Normal average shaders.
if (AdjacentEdgeAverage && !context.Tags.Get(HasFinalCallback))
{
context.Tags.Set(HasFinalCallback, true);
context.Material.TessellationMethod = ParadoxTessellationMethod.AdjacentEdgeAverage;
context.AddFinalCallback(MaterialShaderStage.Domain, AddAdjacentEdgeAverageMacros);
context.AddFinalCallback(MaterialShaderStage.Domain, AddAdjacentEdgeAverageShaders);
}
}
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(DefaultAlpha);
context.SetStream(AlphaDiscardStream.Stream, alpha, MaterialKeys.AlphaDiscardMap, MaterialKeys.AlphaDiscardValue, new Color(DefaultAlpha));
if (!context.Tags.Get(HasFinalCallback))
{
context.Tags.Set(HasFinalCallback, true);
context.AddFinalCallback(MaterialShaderStage.Pixel, AddDiscardFromLuminance);
}
}
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);
}
}
