public override void GenerateShader(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.MaterialPass.TessellationMethod = XenkoTessellationMethod.AdjacentEdgeAverage;
context.AddFinalCallback(MaterialShaderStage.Domain, AddAdjacentEdgeAverageMacros);
context.AddFinalCallback(MaterialShaderStage.Domain, AddAdjacentEdgeAverageShaders);
}
}
public override void GenerateShader(MaterialGeneratorContext context)
{
var alpha = Alpha ?? new ComputeFloat(0.5f);
var tint = Tint ?? new ComputeColor(Color.White);
alpha.ClampFloat(0, 1);
// Use pre-multiplied alpha to support both additive and alpha blending
if (context.MaterialPass.BlendState == null)
{
context.MaterialPass.BlendState = BlendStates.AlphaBlend;
}
context.MaterialPass.HasTransparency = true;
// TODO GRAPHICS REFACTOR
//context.Parameters.SetResourceSlow(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);
context.MaterialPass.Parameters.Set(MaterialKeys.UsePixelShaderWithDepthPass, true);
if (!context.Tags.Get(HasFinalCallback))
{
context.Tags.Set(HasFinalCallback, true);
context.AddFinalCallback(MaterialShaderStage.Pixel, AddDiffuseSpecularAlphaBlendColor);
}
}
public override void GenerateShader(MaterialGeneratorContext context)
{
var alpha = Alpha ?? new ComputeFloat(1f);
var tint = Tint ?? new ComputeColor(Color.White);
alpha.ClampFloat(0, 1);
// Use pre-multiplied alpha to support both additive and alpha blending
if (context.MaterialPass.BlendState == null)
{
context.MaterialPass.BlendState = BlendStates.AlphaBlend;
}
context.MaterialPass.HasTransparency = true;
// TODO GRAPHICS REFACTOR
//context.Parameters.SetResourceSlow(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);
context.MaterialPass.Parameters.Set(MaterialKeys.UsePixelShaderWithDepthPass, true);
if (!context.Tags.Get(HasFinalCallback))
{
context.Tags.Set(HasFinalCallback, true);
context.AddFinalCallback(MaterialShaderStage.Pixel, AddDiffuseSpecularAlphaBlendColor, ShadingColorAlphaFinalCallbackOrder);
}
}
public override void GenerateShader(MaterialGeneratorContext context)
{
var alpha = Alpha ?? new ComputeFloat(DefaultAlpha);
alpha.ClampFloat(0, 1);
context.SetStream(AlphaDiscardStream.Stream, alpha, MaterialKeys.AlphaDiscardMap, MaterialKeys.AlphaDiscardValue, new Color(DefaultAlpha));
context.MaterialPass.Parameters.Set(MaterialKeys.UsePixelShaderWithDepthPass, true);
if (!context.Tags.Get(HasFinalCallback))
{
context.Tags.Set(HasFinalCallback, true);
context.AddFinalCallback(MaterialShaderStage.Pixel, AddDiscardFromLuminance);
}
}
public override void GenerateShader(MaterialGeneratorContext context)
{
base.GenerateShader(context);
var attributes = context.CurrentMaterialDescriptor.Attributes;
int glassPassIndex = context.PassIndex % 2;
if (attributes.CullMode == CullMode.None)
{
context.MaterialPass.CullMode = context.PassIndex < 2 ? CullMode.Back : CullMode.Front;
}
else
{
context.MaterialPass.CullMode = attributes.CullMode;
}
// Compute transmittance
context.GetShading(this).LightDependentExtraModels.Add(new ShaderClassSource("MaterialTransmittanceReflectanceStream"));
context.Parameters.Set(MaterialTransmittanceReflectanceStreamKeys.RefractiveIndex, RefractiveIndex);
context.MaterialPass.HasTransparency = true;
if (glassPassIndex == 0)
{
// Transmittance pass
context.MaterialPass.BlendState = new BlendStateDescription(Blend.Zero, Blend.SourceColor)
{
RenderTarget0 = { AlphaSourceBlend = Blend.One, AlphaDestinationBlend = Blend.Zero }
};
// Shader output is matTransmittance
// Note: we make sure to run after MaterialTransparencyBlendFeature so that shadingColorAlpha is fully updated
context.AddFinalCallback(MaterialShaderStage.Pixel, AddMaterialSurfaceTransmittanceShading, MaterialTransparencyBlendFeature.ShadingColorAlphaFinalCallbackOrder + 1);
}
else if (glassPassIndex == 1)
{
// Reflectance pass
context.MaterialPass.BlendState = BlendStates.Additive;
}
}