From 39c710b19c1669dfd1f5d82b17b46209f8960189 Mon Sep 17 00:00:00 2001
From: BlueRose <378100977@qq.com>
Date: Thu, 14 Nov 2024 12:59:18 +0800
Subject: [PATCH] vault backup: 2024-11-14 12:59:18

---
 .../DynamicMeshDraw.md                        |  0
 .../MeshDraw.md                               |  0
 .../UE5.5 MeshDraw&SceneProxy探索.md          | 91 +++++++++++++++++++
 .../材质中PassSwitch节点实现方式.md           |  0
 4 files changed, 91 insertions(+)
 rename 03-UnrealEngine/Rendering/RenderingPipeline/{ => Materials&MeshDraw}/DynamicMeshDraw.md (100%)
 rename 03-UnrealEngine/Rendering/RenderingPipeline/{Materials => Materials&MeshDraw}/MeshDraw.md (100%)
 create mode 100644 03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/UE5.5 MeshDraw&SceneProxy探索.md
 rename 03-UnrealEngine/Rendering/RenderingPipeline/{Materials => Materials&MeshDraw}/材质中PassSwitch节点实现方式.md (100%)

diff --git a/03-UnrealEngine/Rendering/RenderingPipeline/DynamicMeshDraw.md b/03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/DynamicMeshDraw.md
similarity index 100%
rename from 03-UnrealEngine/Rendering/RenderingPipeline/DynamicMeshDraw.md
rename to 03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/DynamicMeshDraw.md
diff --git a/03-UnrealEngine/Rendering/RenderingPipeline/Materials/MeshDraw.md b/03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/MeshDraw.md
similarity index 100%
rename from 03-UnrealEngine/Rendering/RenderingPipeline/Materials/MeshDraw.md
rename to 03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/MeshDraw.md
diff --git a/03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/UE5.5 MeshDraw&SceneProxy探索.md b/03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/UE5.5 MeshDraw&SceneProxy探索.md
new file mode 100644
index 0000000..e449457
--- /dev/null
+++ b/03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/UE5.5 MeshDraw&SceneProxy探索.md	
@@ -0,0 +1,91 @@
+---
+title: Untitled
+date: 2024-11-14 12:19:36
+excerpt: 
+tags: 
+rating: ⭐
+---
+# 前言
+探索思路：
+- [ ] SceneProxy收集机制的改变。
+- [ ] GetDynamicMeshElements的调用方式。
+- [ ] 在SendRenderDynamicData_Concurrent中添加（模仿USkeletalMeshComponent::SendRenderDynamicData_Concurrent()与FDebugSkelMeshSceneProxy）
+
+# GetDynamicMeshElements
+看得出主要在FDynamicMeshElementContext::GatherDynamicMeshElementsForPrimitive()中调用Primitive->Proxy->GetDynamicMeshElements()。
+
+```c++
+UE::Tasks::FTask FDynamicMeshElementContext::LaunchAsyncTask(FDynamicPrimitiveIndexQueue* PrimitiveIndexQueue, UE::Tasks::ETaskPriority TaskPriority)
+{
+	return Pipe.Launch(UE_SOURCE_LOCATION, [this, PrimitiveIndexQueue]
+	{
+		FOptionalTaskTagScope Scope(ETaskTag::EParallelRenderingThread);
+		FDynamicPrimitiveIndex PrimitiveIndex;
+
+		while (PrimitiveIndexQueue->Pop(PrimitiveIndex))
+		{
+			GatherDynamicMeshElementsForPrimitive(Primitives[PrimitiveIndex.Index], PrimitiveIndex.ViewMask);
+		}
+
+#if WITH_EDITOR
+		while (PrimitiveIndexQueue->PopEditor(PrimitiveIndex))
+		{
+			GatherDynamicMeshElementsForEditorPrimitive(Primitives[PrimitiveIndex.Index], PrimitiveIndex.ViewMask);
+		}
+#endif
+	}, TaskPriority);
+}
+
+void FDynamicMeshElementContext::GatherDynamicMeshElementsForPrimitive(FPrimitiveSceneInfo* Primitive, uint8 ViewMask)
+{
+	SCOPED_NAMED_EVENT(DynamicPrimitive, FColor::Magenta);
+
+	TArray<int32, TInlineAllocator<4>> MeshBatchCountBefore;
+	MeshBatchCountBefore.SetNumUninitialized(Views.Num());
+	for (int32 ViewIndex = 0; ViewIndex < Views.Num(); ViewIndex++)
+	{
+		MeshBatchCountBefore[ViewIndex] = MeshCollector.GetMeshBatchCount(ViewIndex);
+	}
+
+	MeshCollector.SetPrimitive(Primitive->Proxy, Primitive->DefaultDynamicHitProxyId);
+
+	// If Custom Render Passes aren't in use, there will be only one group, which is the common case.
+	if (ViewFamilyGroups.Num() == 1 || Primitive->Proxy->SinglePassGDME())
+	{
+		Primitive->Proxy->GetDynamicMeshElements(FirstViewFamily.AllViews, FirstViewFamily, ViewMask, MeshCollector);
+	}
+	else
+	{
+		for (FViewFamilyGroup& Group : ViewFamilyGroups)
+		{
+			if (uint8 MaskedViewMask = ViewMask & Group.ViewSubsetMask)
+			{
+				Primitive->Proxy->GetDynamicMeshElements(FirstViewFamily.AllViews, *Group.Family, MaskedViewMask, MeshCollector);
+			}
+		}
+	}
+
+	for (int32 ViewIndex = 0; ViewIndex < Views.Num(); ViewIndex++)
+	{
+		FViewInfo& View = *Views[ViewIndex];
+
+		if (ViewMask & (1 << ViewIndex))
+		{
+			FDynamicPrimitive& DynamicPrimitive = DynamicPrimitives.Emplace_GetRef();
+			DynamicPrimitive.PrimitiveIndex = Primitive->GetIndex();
+			DynamicPrimitive.ViewIndex = ViewIndex;
+			DynamicPrimitive.StartElementIndex = MeshBatchCountBefore[ViewIndex];
+			DynamicPrimitive.EndElementIndex = MeshCollector.GetMeshBatchCount(ViewIndex);
+		}
+	}
+}
+```
+
+# SendRenderDynamicData_Concurrent
+
+## FDebugSkelMeshSceneProxy::GetDynamicMeshElements
+
+
+# 其他？
+
+MeshBuilderSurface.GetMesh(GetLocalToWorld(), MatProxySurface, SDPG_Foreground, false, false, ViewIndex, Collector);
\ No newline at end of file
diff --git a/03-UnrealEngine/Rendering/RenderingPipeline/Materials/材质中PassSwitch节点实现方式.md b/03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/材质中PassSwitch节点实现方式.md
similarity index 100%
rename from 03-UnrealEngine/Rendering/RenderingPipeline/Materials/材质中PassSwitch节点实现方式.md
rename to 03-UnrealEngine/Rendering/RenderingPipeline/Materials&MeshDraw/材质中PassSwitch节点实现方式.md