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03-UnrealEngine/卡通渲染相关资料/渲染功能/PostProcess/ToonPostProcess.md
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@ -393,4 +393,30 @@ FScreenPassTextureSlice SceneColorSlice = FScreenPassTextureSlice::CreateFromScr
将渲染结果转换成`FScreenPassTextureSlice`: 将渲染结果转换成`FScreenPassTextureSlice`:
```c++ ```c++
SceneColorSlice = FScreenPassTextureSlice::CreateFromScreenPassTexture(GraphBuilder, AddToonPostProcessBeforeTonemappingPass(GraphBuilder, View, PassInputs)); 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;
}
``` ```