vault backup: 2024-12-16 22:25:20

.obsidian/plugins/various-complements/histories.json

@@ -1 +1 @@
-{"AI动捕优化思路：":{"AI动捕优化思路：":{"currentFile":{"count":1,"lastUpdated":1731243010285}}},"TODO清单":{"TODO清单":{"internalLink":{"count":1,"lastUpdated":1731553316709}}},"CustomThunk":{"CustomThunk":{"internalLink":{"count":1,"lastUpdated":1731555464503}}},"MobileTAA只做两帧混合":{"MobileTAA只做两帧混合":{"currentFile":{"count":1,"lastUpdated":1731557419798}}},"UMG组件作用笔记":{"UMG组件作用笔记":{"internalLink":{"count":1,"lastUpdated":1731557505574}}},"SequoiaCamShotEvalTemplate":{"SequoiaCamShotEvalTemplate":{"currentFile":{"count":1,"lastUpdated":1732609264076}}},"c++内存泄漏分析工具":{"c++内存泄漏分析工具":{"internalLink":{"count":1,"lastUpdated":1733137754779}}},"Lights":{"Lights":{"currentFile":{"count":1,"lastUpdated":1733637911876}}}}
+{"SequoiaCamShotEvalTemplate":{"SequoiaCamShotEvalTemplate":{"currentFile":{"count":1,"lastUpdated":1732609264076}}},"c++内存泄漏分析工具":{"c++内存泄漏分析工具":{"internalLink":{"count":1,"lastUpdated":1733137754779}}},"Lights":{"Lights":{"currentFile":{"count":1,"lastUpdated":1733637911876}}},"渲染屏幕空间阴影遮罩，并用于光照计算。":{"渲染屏幕空间阴影遮罩，并用于光照计算。":{"currentFile":{"count":1,"lastUpdated":1734354537396}}}}

03-UnrealEngine/卡通渲染相关资料/渲染功能/阴影控制/ToonShadow.md

@@ -210,13 +210,17 @@ void FSceneRenderer::InitDynamicShadows(FRHICommandListImmediate& RHICmdList, FG
 		1. UnbatchedLights
 			1. ShadowProjectionOnOpaque
 # ShadowDepths
+渲染阴影深度贴图与图集。
+
 - FSceneRenderer::RenderShadowDepthMaps()：位于CustomDepth之前。
-	- **RenderVirtualShadowMaps()**
+	- RenderVirtualShadowMaps()
-	- RenderShadowDepthMapAtlases()
+	- ***RenderShadowDepthMapAtlases()***
 	- SortedShadowsForShadowDepthPass.ShadowMapCubemaps循环。渲染点光源阴影立方体图
 		- **FProjectedShadowInfo::RenderDepth()**
 		- **FProjectedShadowInfo::RenderTranslucencyDepths**
 
+RenderShadowDepthMapAtlases() 渲染的图集位于***FSceneRenderer::SortedShadowsForShadowDepthPass.ShadowMapAtlases***
+
 ## RenderDepth
 MeshDrawProcessor为***FShadowDepthPassMeshProcessor***。渲染的Shader为***ShadowDepthPixelShader.usf***
 ```c++
@@ -753,84 +757,10 @@ void Main(
 #endif
 }
 ```
-# Lights
-### Shader
-ShadowProjectionPixelShader.usf
-- TShadowProjectionPS：
-- TDirectionalPercentageCloserShadowProjectionPS：方向光投影
-- TSpotPercentageCloserShadowProjectionPS：SpotLight
-- FOnePassPointShadowProjectionPS(Moible?)
-
-### 相关函数
-- FDeferredShadingSceneRenderer::RenderLights()
-	- FDeferredShadingSceneRenderer::RenderDeferredShadowProjections()
-		- FSceneRenderer::RenderShadowProjections()
-			- FProjectedShadowInfo::SetupFrustumForProjection()：构建阴影投影4棱椎平面信息。
-			- FProjectedShadowInfo::SetupProjectionStencilMask()：
-
-## 其他
-顺序：
-RenderCustomDepthPass
-
-FSceneRenderer::CreateDynamicShadows
-=>
-FSceneRenderer::CreatePerObjectProjectedShadow
-
-```c++
-if (!IsForwardShadingEnabled(ShaderPlatform))  
-{  
-    // Dynamic shadows are synced later when using the deferred path to make more headroom for tasks.  
-    FinishInitDynamicShadows(GraphBuilder, InitViewTaskDatas.DynamicShadows, InstanceCullingManager, ExternalAccessQueue);  
-}
-```
-
-```c++
-if (RendererOutput == ERendererOutput::DepthPrepassOnly)
-	{
-		RenderOcclusionLambda();
-
-		if (bUpdateNaniteStreaming)
-		{
-			Nanite::GStreamingManager.SubmitFrameStreamingRequests(GraphBuilder);
-		}
-
-		CopySceneCaptureComponentToTarget(GraphBuilder, SceneTextures, ViewFamilyTexture, ViewFamily, Views);
-	}
-	else
-	{
-		GVRSImageManager.PrepareImageBasedVRS(GraphBuilder, ViewFamily, SceneTextures);
-
-		if (!IsForwardShadingEnabled(ShaderPlatform))
-		{
-			// Dynamic shadows are synced later when using the deferred path to make more headroom for tasks.
-			FinishInitDynamicShadows(GraphBuilder, InitViewTaskDatas.DynamicShadows, InstanceCullingManager, ExternalAccessQueue);
-		}
-
-		// Update groom only visible in shadow
-		if (IsHairStrandsEnabled(EHairStrandsShaderType::All, Scene->GetShaderPlatform()) && RendererOutput == ERendererOutput::FinalSceneColor)
-		{
-			UpdateHairStrandsBookmarkParameters(Scene, Views, HairStrandsBookmarkParameters);
-
-			// Interpolation for cards/meshes only visible in shadow needs to happen after the shadow jobs are completed
-			const bool bRunHairStrands = HairStrandsBookmarkParameters.HasInstances() && (Views.Num() > 0);
-			if (bRunHairStrands)
-			{
-				RunHairStrandsBookmark(GraphBuilder, EHairStrandsBookmark::ProcessCardsAndMeshesInterpolation_ShadowView, HairStrandsBookmarkParameters);
-			}
-		}
-	
-		// NOTE: The ordering of the lights is used to select sub-sets for different purposes, e.g., those that support clustered deferred.
-		FSortedLightSetSceneInfo& SortedLightSet = *GraphBuilder.AllocObject<FSortedLightSetSceneInfo>();
-		{
-			RDG_CSV_STAT_EXCLUSIVE_SCOPE(GraphBuilder, SortLights);
-			RDG_GPU_STAT_SCOPE(GraphBuilder, SortLights);
-			ComputeLightGridOutput = GatherLightsAndComputeLightGrid(GraphBuilder, bComputeLightGrid, SortedLightSet);
-		}
-```
-
-
 
 # RenderLights
+渲染ScreenShadowMask，并用于光照计算。
+
 FDeferredShadingSceneRenderer::RenderLights()
 => 
 RDG_EVENT_SCOPE(GraphBuilder, "UnbatchedLights");//batchedLights为没有LightFunction与没有阴影的灯光。
@@ -901,6 +831,20 @@ void FDeferredShadingSceneRenderer::RenderDeferredShadowProjections(
 RenderShadowProjections():
 1. 取得当前FVisibleLightInfo、FLightSceneProxy；创建FProjectedShadowInfoArray DistanceFieldShadows、NormalShadows。
 2. 遍历VisibleLightInfo.ShadowsToProject，按照阴影特征将每个FProjectedShadowInfo加入DistanceFieldShadows、NormalShadows。
+3. 调用FSceneRenderer::RenderShadowProjections()渲染ScreenShadowMask。
+
+FSceneRenderer::RenderShadowProjections()
+1. 初始化UniformStruct变量。
+2. 遍历传入的FProjectedShadowInfo数组，并调用**ProjectedShadowInfo->RenderProjection()** 将所有灯光的阴影Mask绘制到一张ScreenShadowMask上。
+	1. 在TShadowProjectionPS中通过SetParameters() => ProjectionParameters.Set()，来设置ShadowDepthTextureValue。`ShadowDepthTextureValue = ShadowInfo->RenderTargets.DepthTarget->GetRHI();`
+
+### Shader
+ShadowProjectionPixelShader.usf
+
+
+- ShadowProjectionCommon.ush
+	- ShadowDepthTexture
+	- ShadowDepthCubeTexture
 
 # 半程阴影
 由晨风&Neverwind提出：
@@ -947,9 +891,11 @@ PS.很有可能需要创建2个Atlas。Atlas的创建位于***FSceneRenderer::Al
 //此阶段需要屏蔽角色投射到自己的非半程阴影
 //和角色投射到场景中会跟随视角移动的阴影
 ```c++
-if(Toon材质,且没有程阴影Flag的阴影
+if(Toon材质,且没有半程阴影Flag的阴影
 &&非Toon材质但有半程阴影Flag的阴影)
 {
 	屏蔽此阴影
 }
 ```
+
+PS.很有可能在FProjectedShadowInfo::RenderProjection()阶段进行判断以此保证合成正确的**ScreenShadowMask**。