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BlueRose 2025-02-11 21:12:55 +08:00
parent bb9633fecd
commit da264458f6
1 changed files with 9 additions and 4 deletions
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13
03-UnrealEngine/Rendering/RenderingPipeline/Lighting/Lighting.md
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@ -360,8 +360,9 @@ void DeferredLightPixelMain(
const float SceneDepth = CalcSceneDepth(InputParams.ScreenUV); const float SceneDepth = CalcSceneDepth(InputParams.ScreenUV);
const FDerivedParams DerivedParams = GetDerivedParams(InputParams, SceneDepth); const FDerivedParams DerivedParams = GetDerivedParams(InputParams, SceneDepth);
//设置获取光源各种信息
FDeferredLightData LightData = InitDeferredLightFromUniforms(CURRENT_LIGHT_TYPE); FDeferredLightData LightData = InitDeferredLightFromUniforms(CURRENT_LIGHT_TYPE);
UpdateLightDataColor(LightData, InputParams, DerivedParams); UpdateLightDataColor(LightData, InputParams, DerivedParams);//根据当前世界坐标计算LightData.Color *= 大气&云&阴影的衰减值 * IES灯亮度（非IES灯数值为1）
float3 V =-DerivedParams.CameraVector; float3 V =-DerivedParams.CameraVector;
float3 L = LightData.Direction; // Already normalized float3 L = LightData.Direction; // Already normalized
@ -404,7 +405,7 @@ void DeferredLightPixelMain(
} }
#else // STRATA_ENABLED #else // STRATA_ENABLED
//取得屏幕空间数据（FGbufferData、AO）
FScreenSpaceData ScreenSpaceData = GetScreenSpaceData(InputParams.ScreenUV); FScreenSpaceData ScreenSpaceData = GetScreenSpaceData(InputParams.ScreenUV);
// Only light pixels marked as using deferred shading // Only light pixels marked as using deferred shading
BRANCH if (ScreenSpaceData.GBuffer.ShadingModelID > 0 BRANCH if (ScreenSpaceData.GBuffer.ShadingModelID > 0
@ -413,19 +414,23 @@ void DeferredLightPixelMain(
#endif #endif
) )
{ {
//通过SceneDepth获取的CameraVector以及当前像素的世界坐标
const float SceneDepth = CalcSceneDepth(InputParams.ScreenUV); const float SceneDepth = CalcSceneDepth(InputParams.ScreenUV);
const FDerivedParams DerivedParams = GetDerivedParams(InputParams, SceneDepth); const FDerivedParams DerivedParams = GetDerivedParams(InputParams, SceneDepth);
//设置获取光源各种信息
FDeferredLightData LightData = InitDeferredLightFromUniforms(CURRENT_LIGHT_TYPE); FDeferredLightData LightData = InitDeferredLightFromUniforms(CURRENT_LIGHT_TYPE);
UpdateLightDataColor(LightData, InputParams, DerivedParams); UpdateLightDataColor(LightData, InputParams, DerivedParams);//根据当前世界坐标计算LightData.Color *= 大气&云&阴影的衰减值 * IES灯亮度（非IES灯数值为1）
#if USE_HAIR_COMPLEX_TRANSMITTANCE #if USE_HAIR_COMPLEX_TRANSMITTANCE
//针对ShadingModel Hair（同时需要CustomData.a > 0)计算头发散射结果
if (ScreenSpaceData.GBuffer.ShadingModelID == SHADINGMODELID_HAIR && ShouldUseHairComplexTransmittance(ScreenSpaceData.GBuffer)) if (ScreenSpaceData.GBuffer.ShadingModelID == SHADINGMODELID_HAIR && ShouldUseHairComplexTransmittance(ScreenSpaceData.GBuffer))
{ {
LightData.HairTransmittance = EvaluateDualScattering(ScreenSpaceData.GBuffer, DerivedParams.CameraVector, -DeferredLightUniforms.Direction); LightData.HairTransmittance = EvaluateDualScattering(ScreenSpaceData.GBuffer, DerivedParams.CameraVector, -DeferredLightUniforms.Direction);
} }
#endif #endif
//计算当前像素的抖动值
float Dither = InterleavedGradientNoise(InputParams.PixelPos, View.StateFrameIndexMod8); float Dither = InterleavedGradientNoise(InputParams.PixelPos, View.StateFrameIndexMod8);
float SurfaceShadow = 1.0f; float SurfaceShadow = 1.0f;