SkyLight 添加LightingChannelMask功能

素颜马尾好姑娘i 2023-09-26 09:14 50阅读 0赞

## PC端 SkyLight 添加LightingChannelMask功能 ##

1.  Skylight Shader参数 IndirectLightRendering.h–>FSkyDiffuseLightingParameters
2.  PS函数 ReflectionEnvironmentPixelShader.usf–>ReflectionEnvironmentSkyLighting
3.  相关shader

IMPLEMENT_GLOBAL_SHADER(FDiffuseIndirectCompositePS, "/Engine/Private/DiffuseIndirectComposite.usf", "MainPS", SF_Pixel);
    IMPLEMENT_GLOBAL_SHADER(FAmbientCubemapCompositePS, "/Engine/Private/AmbientCubemapComposite.usf", "MainPS", SF_Pixel);
    IMPLEMENT_GLOBAL_SHADER(FReflectionEnvironmentSkyLightingPS, "/Engine/Private/ReflectionEnvironmentPixelShader.usf", "ReflectionEnvironmentSkyLighting", SF_Pixel);

### \-------------------SkyLight逻辑流程---------------- ###

FDeferredShadingSceneRenderer::Render() {
    	RenderDeferredReflectionsAndSkyLighting() {
    		AddSkyReflectionPass()
    	}
    }
    IndirectLightRendering.cpp{
    	RenderDeferredReflectionsAndSkyLighting(){
    		AddSkyReflectionPass()
    	}
    }

### \-------------SkyLight功能添加修改内容-------------------- ###

1.  in SkyLightComponent.h::USkyLightComponent add  
    \{  
    UPROPERTY(EditAnywhere, AdvancedDisplay, BlueprintReadOnly, Category = Light)  
    FLightingChannels LightingChannels;  
    \}
2.  in SceneManagement.h::FSkyLightSceneProxy add  
    \{  
    uint8 LightingChannelMask;  
    \}
3.  in SkyLightComponent.cpp::FSkyLightSceneProxy add  
    \{  
    LightingChannelMask(GetLightingChannelMaskForStruct(InLightComponent->LightingChannels))  
    \}
4.  in IndirectLightRendering.h::FSkyDiffuseLightingParameters add  
    \{  
    SHADER\_PARAMETER(uint32,LightingChannelMask)  
    \}
5.  in IndirectLightRendering.cpp::GetSkyDiffuseLightingParameters add  
    \{  
    Out.LightingChannelMask = SkyLight->LightingChannelMask;  
    \}
6.  在RenderDeferredReflectionsAndSkyLighting函数添加LightingChannelsTexture  
    函数申明在DeferredShadingRenderer.h，函数定义在IndirectLightRendering.cpp  
    \{  
    FRDGTextureRef LightingChannelsTexture;  
    \}
7.  在FReflectionEnvironmentSkyLightingPS::FParameters添加  
    \{