vault backup: 2024-03-14 20:26:25

03-UnrealEngine/卡通渲染相关资料/渲染功能/ShaderModel/GBuffer&Material&BasePass.md

@@ -233,10 +233,9 @@ static TAutoConsoleVariable<int32> CVarMaterialEnableNewHLSLGenerator(
     TEXT("2 - Force all materials to use new generator\n"),  
     ECVF_RenderThreadSafe | ECVF_ReadOnly);
 ```
+这个和新版材质HLSL生成器有关，相关生成代码为**MaterialEmitHLSL()**=>调用**GenerateMaterialTemplateHLSL()**
 
 bCompileForComputeShader = Material->IsLightFunction();
-
-
 GetPerInstanceCustomDataX分为Vertex与Pixel版本。
 
 #### FMaterialAttributes
@@ -340,51 +339,6 @@ bool FMaterialInstanceResource::GetParameterValue(EMaterialParameterType Type, c
 	}
 ```
 
-
-MaterialEmitHLSL()=>
-```c++
-bool MaterialEmitHLSL(const FMaterialCompileTargetParameters& InCompilerTarget,  
-    const FStaticParameterSet& InStaticParameters,  
-    FMaterial& InOutMaterial,  
-    FMaterialCompilationOutput& OutCompilationOutput,  
-    TRefCountPtr<FSharedShaderCompilerEnvironment>& OutMaterialEnvironment)
-{
-...
-	if (DerivativeIndex == 0)  
-	{  
-	    const EMaterialDomain MaterialDomain = EmitContext.Material->GetMaterialDomain();  
-	    if (MaterialDomain == MD_Volume || (MaterialDomain == MD_Surface && IsSubsurfaceShadingModel(EmitMaterialData.ShadingModelsFromCompilation)))  
-	    {       const FMaterialParameterInfo SubsurfaceProfileParameterInfo(GetSubsurfaceProfileParameterName());  
-	       const FMaterialParameterMetadata SubsurfaceProfileParameterMetadata(1.f);  
-	       const Material::FExpressionParameter SubsurfaceProfileExpression(SubsurfaceProfileParameterInfo, SubsurfaceProfileParameterMetadata);  
-	  
-	       const FPreparedType SubsurfaceProfilePreparedType = EmitContext.PrepareExpression(&SubsurfaceProfileExpression, *EmitResultScope, EValueType::Float1);  
-	       const FEmitShaderExpression* SubsurfaceProfileEmitExpression = SubsurfaceProfileExpression.GetValueShader(  
-	          EmitContext,  
-	          *EmitResultScope,  
-	          EValueType::Float1,  
-	          SubsurfaceProfilePreparedType,  
-	          EValueType::Float1);  
-	       check(SubsurfaceProfileEmitExpression && SubsurfaceProfileEmitExpression->Reference);  
-	       SubsurfaceProfileShaderCode = SubsurfaceProfileEmitExpression->Reference;  
-	    }
-	}
-	...
-	
-	MaterialTemplateSource = GenerateMaterialTemplateHLSL(InCompilerTarget.ShaderPlatform,  
-	    InOutMaterial,  
-	    EmitContext,  
-	    Declarations.ToString(),  
-	    SharedCode.ToString(),  
-	    VertexCode.ToString(),  
-	    InputPixelCodePhase0,  
-	    InputPixelCodePhase1,  
-	    SubsurfaceProfileShaderCode,  
-	    OutCompilationOutput);
-}
-```
-调用GenerateMaterialTemplateHLSL()
-
 ### 是否需要Toon
 在材质中：
 ```c++
@@ -459,8 +413,39 @@ bool FDeferredShadingSceneRenderer::ShouldRenderToonDataPass() const
 从3开始，0、1、2已被占用。
 - ?
 
-## ToonData
+## ToonBufferData
+- ToonObjectID
 
+```c++
+struct FSceneDataIntermediates  
+{  
+    uint PrimitiveId;  
+    uint InstanceId;  
+    uint ViewIndex;  
+    uint CullingFlags;  
+    // Index from which we load the instance info, needed for the   
+	uint InstanceIdLoadIndex;  
+    FInstanceSceneData InstanceData;  
+    FPrimitiveSceneData Primitive;  
+};
+
+struct FVertexFactoryIntermediatesCommon  
+{  
+    /** Cached primitive and instance data */  
+    FSceneDataIntermediates SceneData;  
+#if USE_INSTANCING || USE_INSTANCE_CULLING  
+    FVertexFactoryInstanceInput InstanceInput;  
+#endif  
+#if USE_SPLINEDEFORM  
+    FSplineMeshShaderParams SplineMeshParams;  
+#endif  
+};
+
+FPrimitiveSceneData GetPrimitiveData(FVertexFactoryIntermediatesCommon Intermediates)  
+{  
+    return Intermediates.SceneData.Primitive;  
+}
+```
 
 ## 高光
 - PBR高光（使用Roughness控制是否可行？是否需要传入GBuffer一个Mask贴图）