public override void GenerateShader(MaterialGeneratorContext context)
{
if (NormalMap != null)
{
// Inform the context that we are using matNormal (from the MaterialSurfaceNormalMap shader)
context.UseStreamWithCustomBlend(MaterialShaderStage.Pixel, NormalStream.Stream, new ShaderClassSource("MaterialStreamNormalBlend"));
context.Parameters.Set(MaterialKeys.HasNormalMap, true);
context.Parameters.Set(MaterialKeys.SkipTangents, SkipTangents);
var normalMap = NormalMap;
// Workaround to make sure that normal map are setup
var computeTextureColor = normalMap as ComputeTextureColor;
if (computeTextureColor != null)
{
if (computeTextureColor.FallbackValue.Value == Color.White)
{
computeTextureColor.FallbackValue.Value = DefaultNormalColor;
}
}
else
{
var computeColor = normalMap as ComputeColor;
if (computeColor != null)
{
if (computeColor.Value == Color.Black || computeColor.Value == Color.White)
{
computeColor.Value = DefaultNormalColor;
}
}
else
{
var computeFloat4 = normalMap as ComputeFloat4;
if (computeFloat4 != null)
{
if (computeFloat4.Value == Vector4.Zero)
{
computeFloat4.Value = DefaultNormalColor.ToVector4();
}
}
}
}
var computeColorSource = NormalMap.GenerateShaderSource(context, new MaterialComputeColorKeys(MaterialKeys.NormalMap, MaterialKeys.NormalValue, DefaultNormalColor, false));
var mixin = new ShaderMixinSource();
mixin.Mixins.Add(new ShaderClassSource("MaterialSurfaceNormalMap", IsXYNormal, ScaleAndBias));
mixin.AddComposition("normalMap", computeColorSource);
context.AddShaderSource(MaterialShaderStage.Pixel, mixin);
}
}
public override void VisitFeature(MaterialGeneratorContext context)
{
if (NormalMap != null)
{
// Inform the context that we are using matNormal (from the MaterialSurfaceNormalMap shader)
context.UseStreamWithCustomBlend(MaterialShaderStage.Pixel, NormalStream.Stream, new ShaderClassSource("MaterialStreamNormalBlend"));
context.Parameters.Set(MaterialKeys.HasNormalMap, true);
var computeColorSource = NormalMap.GenerateShaderSource(context, new MaterialComputeColorKeys(MaterialKeys.NormalMap, MaterialKeys.NormalValue, new Color(0x80, 0x80, 0xFF, 0xFF)));
var mixin = new ShaderMixinSource();
mixin.Mixins.Add(new ShaderClassSource("MaterialSurfaceNormalMap", IsXYNormal, ScaleAndBias));
mixin.AddComposition("normalMap", computeColorSource);
context.AddSurfaceShader(MaterialShaderStage.Pixel, mixin);
}
}