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03-UnrealEngine/卡通渲染相关资料/渲染功能/PostProcess/ToonPostProcess.md

@@ -393,4 +393,30 @@ FScreenPassTextureSlice SceneColorSlice = FScreenPassTextureSlice::CreateFromScr
 将渲染结果转换成`FScreenPassTextureSlice`:
 ```c++
 SceneColorSlice = FScreenPassTextureSlice::CreateFromScreenPassTexture(GraphBuilder, AddToonPostProcessBeforeTonemappingPass(GraphBuilder, View, PassInputs));
+```
+
+```c++
+// Allows for the scene color to be the slice of an array between temporal upscaler and tonemaper.  
+FScreenPassTextureSlice SceneColorSlice = FScreenPassTextureSlice::CreateFromScreenPassTexture(GraphBuilder, SceneColor);
+```
+##  Viewport => TextureUV
+```c++
+PassParameters->SvPositionToInputTextureUV = (  
+	FScreenTransform::SvPositionToViewportUV(Output.ViewRect) *  
+	FScreenTransform::ChangeTextureBasisFromTo(FScreenPassTextureViewport(Inputs.SceneColorSlice), FScreenTransform::ETextureBasis::ViewportUV, FScreenTransform::ETextureBasis::TextureUV));
+```
+
+在Shader中：
+```c++
+Texture2D SceneColorTexture;
+SamplerState SceneColorSampler;
+FScreenTransform SvPositionToInputTextureUV;
+
+void MainPS(  
+    float4 SvPosition : SV_POSITION,  
+    out float4 OutColor : SV_Target0)  
+{  
+    float2 SceneColorUV = ApplyScreenTransform(SvPosition.xy, SvPositionToInputTextureUV);
+	OutColor.rgba = SceneColorTexture.SampleLevel(SceneColorSampler, UV, 0).rgba;    
+}
 ```