private void AddClearCoatNormalMap(MaterialGeneratorContext context)
{
var computeColorKeys = new MaterialComputeColorKeys(MaterialKeys.NormalMap, MaterialKeys.NormalValue, MaterialNormalMapFeature.DefaultNormalColor, false);
var computeColorSource = OrangePeelNormalMap.GenerateShaderSource(context, computeColorKeys);
// Orange Peel Normal Map
var mixinNormalMap = new ShaderMixinSource();
// Inform the context that we are using matNormal (from the MaterialSurfaceNormalMap shader)
context.UseStreamWithCustomBlend(MaterialShaderStage.Pixel, "matNormal", new ShaderClassSource("MaterialStreamNormalBlend"));
context.Parameters.Set(MaterialKeys.HasNormalMap, true);
mixinNormalMap.Mixins.Add(new ShaderClassSource("MaterialSurfaceNormalMap", OrangePeelIsXYNormal, OrangePeelScaleAndBias));
mixinNormalMap.AddComposition("normalMap", computeColorSource);
context.AddShaderSource(MaterialShaderStage.Pixel, mixinNormalMap);
}
public override void GenerateShader(MaterialGeneratorContext context)
{
if (DiffuseMap != null)
{
Vector4 diffuseMin = Vector4.Zero;
Vector4 diffuseMax = Vector4.One;
DiffuseMap.ClampFloat4(ref diffuseMin, ref diffuseMax);
var computeColorSource = DiffuseMap.GenerateShaderSource(context, new MaterialComputeColorKeys(MaterialKeys.DiffuseMap, MaterialKeys.DiffuseValue, Color.White));
var mixin = new ShaderMixinSource();
mixin.Mixins.Add(new ShaderClassSource("MaterialSurfaceDiffuse"));
mixin.AddComposition("diffuseMap", computeColorSource);
context.UseStream(MaterialShaderStage.Pixel, DiffuseStream.Stream);
context.UseStream(MaterialShaderStage.Pixel, ColorBaseStream.Stream);
context.AddShaderSource(MaterialShaderStage.Pixel, mixin);
}
}
public void Visit(MaterialGeneratorContext context)
{
if (!Enabled)
{
return;
}
switch (context.Step)
{
case MaterialGeneratorStep.PassesEvaluation:
MultipassGeneration(context);
break;
case MaterialGeneratorStep.GenerateShader:
GenerateShader(context);
break;
}
}
public override void GenerateShader(MaterialGeneratorContext context)
{
// TODO: Look through the compositions and don't add the discard mixin if it has already been added?
// TODO: That doesn't seem to work well because the diffuse shader doesn't get recreated when the specular one is being recreated... unless I'm wrong about that.
var shaderSource = new ShaderMixinSource();
shaderSource.Mixins.Add(new ShaderClassSource("MaterialSurfaceShadingSpecularHair", (int)ShadingModel, DebugRenderPasses));
shaderSource.AddComposition("hairLightAttenuationFunction", LightAttenuationFunction.Generate(context));
shaderSource.AddComposition("hairDirectionFunction", HairDirectionFunction.Generate(context));
shaderSource.AddComposition("hairShadowingFunction", HairShadowingFunction.Generate(context));
shaderSource.AddComposition("environmentFunction", Environment.Generate(context));
AddSpecularHighlightsShiftNoiseTexture(context, shaderSource);
AddSecondarySpecularGlintsNoiseTexture(context, shaderSource);
HairShared.SetMaterialPassParameters(context, shaderSource, AlphaThreshold); // Set the rendering parameters and generate the pass-dependent compositions.
// Set the additional parameters used only in the specular shading model:
var parameters = context.MaterialPass.Parameters;
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairScalesAngle, MathUtil.DegreesToRadians(ScalesAngle));
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairSpecularShiftRatio, SpecularShiftRatio);
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairSpecularColor1, SpecularColor1);
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairSpecularColor2, SpecularColor2);
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairSpecularExponent1, SpecularExponent1);
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairSpecularExponent2, SpecularExponent2);
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairSpecularScale1, SpecularScale1);
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairSpecularScale2, SpecularScale2);
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairShiftNoiseScale, ShiftNoiseScale);
parameters.Set(MaterialSurfaceShadingSpecularHairKeys.HairGlintsNoiseStrength, GlintsNoiseStrength);
parameters.Set(MaterialKeys.UsePixelShaderWithDepthPass, true); // Indicates that the material requries the full pixel shader durin the depth-only passes (Z prepass or shadow map rendering).
if (DebugRenderPasses)
{
parameters.Set(MaterialHairSharedKeys.PassID, context.PassIndex); // For debugging the different hair passes.
}
var shaderBuilder = context.AddShading(this);
shaderBuilder.LightDependentSurface = shaderSource;
}
private void AddMetalFlakesGlossiness(MaterialGeneratorContext context)
{
var surfaceToEyeDistance = LODDistance.GenerateShaderSource(context, new MaterialComputeColorKeys(MaterialKeys.GlossinessMap, MaterialKeys.GlossinessValue, Color.White));
// Metal Flakes Glossiness Feature
context.UseStream(MaterialShaderStage.Pixel, "matGlossiness");
var baseGlossinessComputeColorMap = BasePaintGlossinessMap.GenerateShaderSource(context, new MaterialComputeColorKeys(MaterialKeys.GlossinessMap, MaterialKeys.GlossinessValue));
var mixinGlossiness = new ShaderMixinSource();
// Computes glossiness factor for the metal flakes layer (based on the eye to surface distance and the base glossiness value)
mixinGlossiness.Mixins.Add(new ShaderClassSource("MaterialSurfaceGlossinessMapMetalFlakes", BasePaintGlossinessInvert));
mixinGlossiness.AddComposition("glossinessMap", baseGlossinessComputeColorMap);
mixinGlossiness.AddComposition("surfaceToEyeDistanceFactor", surfaceToEyeDistance);
context.AddShaderSource(MaterialShaderStage.Pixel, mixinGlossiness);
}
public virtual void Visit(MaterialGeneratorContext context)
{
// If not enabled, or Material or BlendMap are null, skip this layer
if (!Enabled || Material is null || BlendMap is null || context.FindAsset is null)
{
return;
}
// Find the material from the reference
var material = Material.Descriptor ?? context.FindAsset(Material) as IMaterialDescriptor;
if (material is null)
{
context.Log.Error($"Unable to find material [{Material}].");
return;
}
// Check that material is valid
var materialName = context.GetAssetFriendlyName(Material);
if (!context.PushMaterial(material, materialName))
{
return;
}
try
{
// TODO: Because we are not fully supporting Streams declaration in shaders, we have to workaround this limitation by using a dynamic shader (inline)
// Push a layer for the sub-material
context.PushOverrides(Overrides);
context.PushLayer(BlendMap);
// Generate the material shaders into the current context
material.Visit(context);
}
finally
{
// Pop the stack
context.PopLayer();
context.PopOverrides();
context.PopMaterial();
}
}
public override void GenerateShader(MaterialGeneratorContext context)
{
base.GenerateShader(context);
if (hasAlreadyTessellationFeature)
{
return;
}
// set the tessellation method used enumeration
context.MaterialPass.TessellationMethod |= StrideTessellationMethod.Flat;
// create and affect the shader source
var tessellationShader = new ShaderMixinSource();
tessellationShader.Mixins.Add(new ShaderClassSource("TessellationFlat"));
context.Parameters.Set(MaterialKeys.TessellationShader, tessellationShader);
}
private void AddMetalFlakesDiffuse(MaterialGeneratorContext context)
{
var surfaceToEyeDistance = LODDistance.GenerateShaderSource(context, new MaterialComputeColorKeys(MaterialKeys.GlossinessMap, MaterialKeys.GlossinessValue, Color.White));
// Diffuse Feature (interpolated by the 'regular' diffuse map)
var metalFlakesComputeColorSource = MetalFlakesDiffuseMap.GenerateShaderSource(context, new MaterialComputeColorKeys(MaterialKeys.DiffuseMap, MaterialKeys.DiffuseValue, Color.White));
var mixinDiffuse = new ShaderMixinSource();
// Diffuse uses a custom shader (to perform the interpolation)
mixinDiffuse.Mixins.Add(new ShaderClassSource("MaterialSurfaceDiffuseMetalFlakes"));
mixinDiffuse.AddComposition("diffuseMap", metalFlakesComputeColorSource);
mixinDiffuse.AddComposition("surfaceToEyeDistanceFactor", surfaceToEyeDistance);
context.UseStream(MaterialShaderStage.Pixel, MaterialDiffuseMapFeature.DiffuseStream.Stream);
context.UseStream(MaterialShaderStage.Pixel, MaterialDiffuseMapFeature.ColorBaseStream.Stream);
context.AddShaderSource(MaterialShaderStage.Pixel, mixinDiffuse);
}
public override void GenerateShader(MaterialGeneratorContext context)
{
// Exclude ambient occlusion from uv-scale overrides
var revertOverrides = new MaterialOverrides();
revertOverrides.UVScale = 1.0f / context.CurrentOverrides.UVScale;
context.PushOverrides(revertOverrides);
context.SetStream(OcclusionStream.Stream, AmbientOcclusionMap, MaterialKeys.AmbientOcclusionMap, MaterialKeys.AmbientOcclusionValue, Color.White);
context.PopOverrides();
context.SetStream("matAmbientOcclusionDirectLightingFactor", DirectLightingFactor, null, MaterialKeys.AmbientOcclusionDirectLightingFactorValue);
if (CavityMap != null)
{
context.SetStream(CavityStream.Stream, CavityMap, MaterialKeys.CavityMap, MaterialKeys.CavityValue, Color.White);
context.SetStream("matCavityDiffuse", DiffuseCavity, null, MaterialKeys.CavityDiffuseValue);
context.SetStream("matCavitySpecular", SpecularCavity, null, MaterialKeys.CavitySpecularValue);
}
}
/// <summary>
/// Initializes a new instance of <see cref="MaterialBlendLayerContext"/>.
/// </summary>
/// <param name="context">The material generator context</param>
/// <param name="parentLayerContext">The parent layer context</param>
/// <param name="blendMap">The blend map used for this layer</param>
public MaterialBlendLayerContext(MaterialGeneratorContext context, MaterialBlendLayerContext parentLayerContext, IComputeScalar blendMap)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
Context = context;
Parent = parentLayerContext;
BlendMap = blendMap;
Children = new List <MaterialBlendLayerContext>();
ShadingModels = new MaterialShadingModelCollection();
ContextPerStage = new Dictionary <MaterialShaderStage, MaterialBlendLayerPerStageContext>();
foreach (MaterialShaderStage stage in Enum.GetValues(typeof(MaterialShaderStage)))
{
ContextPerStage[stage] = new MaterialBlendLayerPerStageContext();
}
PendingPixelLayerContext = new MaterialBlendLayerPerStageContext();
}
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;
}
}
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;
// Disable alpha-to-coverage. We wanna do alpha blending, not alpha testing.
context.MaterialPass.AlphaToCoverage = false;
// 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 (DitheredShadows)
{
context.MaterialPass.Parameters.Set(MaterialKeys.UseDitheredShadows, true);
}
if (!context.Tags.Get(HasFinalCallback))
{
context.Tags.Set(HasFinalCallback, true);
context.AddFinalCallback(MaterialShaderStage.Pixel, AddDiffuseSpecularAlphaBlendColor);
}
}
protected virtual void GenerateShaderCompositions(MaterialGeneratorContext context, ShaderMixinSource shaderSource)
{
if (Fresnel != null)
{
shaderSource.AddComposition("fresnelFunction", Fresnel.Generate(context));
}
if (Visibility != null)
{
shaderSource.AddComposition("geometricShadowingFunction", Visibility.Generate(context));
}
if (NormalDistribution != null)
{
shaderSource.AddComposition("normalDistributionFunction", NormalDistribution.Generate(context));
}
if (Environment != null)
{
shaderSource.AddComposition("environmentFunction", Environment.Generate(context));
}
}
public override void GenerateShader(MaterialGeneratorContext context)
{
var shaderSource = new ShaderMixinSource();
shaderSource.Mixins.Add(new ShaderClassSource("MaterialSurfaceShadingDiffuseHair", IsEnergyConservative, (int)ShadingModel, DebugRenderPasses));
shaderSource.AddComposition("hairLightAttenuationFunction", LightAttenuationFunction.Generate(context));
shaderSource.AddComposition("hairDirectionFunction", HairDirectionFunction.Generate(context));
shaderSource.AddComposition("hairShadowingFunction", HairShadowingFunction.Generate(context));
HairShared.SetMaterialPassParameters(context, shaderSource, AlphaThreshold); // Set the rendering parameters and generate the pass-dependent compositions.
context.Parameters.Set(MaterialKeys.UsePixelShaderWithDepthPass, true); // Indicates that material requries using the pixel shader stage during the depth-only pass (Z prepass or shadow map rendering).
if (DebugRenderPasses)
{
context.Parameters.Set(MaterialHairSharedKeys.PassID, context.PassIndex); // For debugging the different hair passes.
}
var shaderBuilder = context.AddShading(this);
shaderBuilder.LightDependentSurface = shaderSource;
}
public override void GenerateShader(MaterialGeneratorContext context)
{
base.GenerateShader(context);
if (hasAlreadyTessellationFeature)
{
return;
}
// set the tessellation method used enumeration
context.MaterialPass.TessellationMethod |= StrideTessellationMethod.PointNormal;
// create and affect the shader source
var tessellationShader = new ShaderMixinSource();
tessellationShader.Mixins.Add(new ShaderClassSource("TessellationPN"));
if (AdjacentEdgeAverage)
{
tessellationShader.Mixins.Add(new ShaderClassSource("TessellationAE4", "PositionWS"));
}
context.Parameters.Set(MaterialKeys.TessellationShader, tessellationShader);
}
public override void GenerateShader(MaterialGeneratorContext context)
{
// Make sure the parameters are not out of range
ClampInputs();
// Set the blend state for both pass
context.MaterialPass.BlendState = BlendStates.Additive;
var isMetalFlakesPass = (context.PassIndex == 0);
if (isMetalFlakesPass)
{
// Do the Base Paint first
AddBaseDiffuse(context);
AddBaseGlossiness(context);
// Then the Metal Flakes
AddMetalFlakesDiffuse(context);
AddMetalFlakesNormal(context);
AddMetalFlakesGlossiness(context);
AddMetalFlakesMetalness(context);
}
else
{
// TODO Add reflections desaturation for environment reflections?
// Ideally, this should be done on top of the regular specular model.
// Unfortunately, after some tests, it seems that overriding the ComputeEnvironmentLightContribution is the only way to do so
// Enable transparency for clear coat pass only
context.MaterialPass.HasTransparency = true;
AddClearCoatNormalMap(context);
AddClearCoatGlossinessMap(context);
AddClearCoatMetalnessMap(context);
}
}
public override void GenerateShader(MaterialGeneratorContext context)
{
if (DisplacementMap == null)
{
return;
}
var materialStage = (MaterialShaderStage)Stage;
// reset the displacement streams at the beginning of the stage
context.AddStreamInitializer(materialStage, "MaterialDisplacementStream");
// set the blending mode of displacement map to additive (and not default linear blending)
context.UseStreamWithCustomBlend(materialStage, DisplacementStream, new ShaderClassSource("MaterialStreamAdditiveBlend", DisplacementStream));
// build the displacement computer
var displacement = DisplacementMap;
if (ScaleAndBias) // scale and bias should be done by layer
{
displacement = new ComputeBinaryScalar(displacement, new ComputeFloat(2f), BinaryOperator.Multiply);
displacement = new ComputeBinaryScalar(displacement, new ComputeFloat(1f), BinaryOperator.Subtract);
}
displacement = new ComputeBinaryScalar(displacement, Intensity, BinaryOperator.Multiply);
// Workaround to inform compute colors that sampling is occurring from a vertex shader
context.IsNotPixelStage = materialStage != MaterialShaderStage.Pixel;
context.SetStream(materialStage, DisplacementStream, displacement, MaterialKeys.DisplacementMap, MaterialKeys.DisplacementValue);
context.IsNotPixelStage = false;
var scaleNormal = materialStage != MaterialShaderStage.Vertex;
var positionMember = materialStage == MaterialShaderStage.Vertex ? "Position" : "PositionWS";
var normalMember = materialStage == MaterialShaderStage.Vertex ? "meshNormal" : "normalWS";
context.SetStreamFinalModifier <MaterialDisplacementMapFeature>(materialStage, new ShaderClassSource("MaterialSurfaceDisplacement", positionMember, normalMember, scaleNormal));
}
/// <summary>
/// Called during prepass, used to enumerate extra passes.
/// </summary>
/// <param name="context">The context.</param>
public virtual void MultipassGeneration(MaterialGeneratorContext context)
{
}
public override void MultipassGeneration(MaterialGeneratorContext context)
{
context.SetMultiplePasses("Hair", 3);
}
public ShaderSource Generate(MaterialGeneratorContext context)
{
return(new ShaderClassSource("MaterialSpecularMicrofacetNormalDistributionBeckmann"));
}
public ShaderSource Generate(MaterialGeneratorContext context, ValueParameterKey <float> uniqueAlphaThresholdKey)
{
return(new ShaderClassSource("MaterialHairDiscardFunctionTransparentPass", uniqueAlphaThresholdKey));
}
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;
}
}
}
public ShaderSource Generate(MaterialGeneratorContext context)
{
return(new ShaderClassSource("MaterialCelShadingLightDefault", IsBlackAndWhite));
}
public ShaderSource Generate(MaterialGeneratorContext context)
{
return(new ShaderClassSource("MaterialSpecularMicrofacetEnvironmentGGXPolynomial"));
}
public ShaderSource Generate(MaterialGeneratorContext context)
{
return(new ShaderClassSource("MaterialSpecularMicrofacetVisibilityCookTorrance"));
}
private void AddDiffuseSpecularAlphaBlendColor(MaterialShaderStage stage, MaterialGeneratorContext context)
{
context.AddShaderSource(MaterialShaderStage.Pixel, new ShaderClassSource("MaterialSurfaceDiffuseSpecularAlphaBlendColor"));
}
public ShaderSource Generate(MaterialGeneratorContext context)
{
return(new ShaderClassSource("MaterialHairLightAttenuationFunctionNone"));
}
public ShaderSource Generate(MaterialGeneratorContext context)
{
return(new ShaderClassSource("MaterialSubsurfaceScatteringScatteringProfileSkin"));
}
/// <summary> /// Generates the shader for the feature. /// </summary> /// <param name="context">The context.</param> public abstract void GenerateShader(MaterialGeneratorContext context);
public ShaderSource Generate(MaterialGeneratorContext context)
{
return(new ShaderClassSource("MaterialSpecularMicrofacetFresnelThinGlass"));
}