vault backup: 2025-06-26 18:45:35

03-UnrealEngine/Rendering/RenderFeature/ShaderWorldPlugin/ShaderWorld.md

@@ -154,6 +154,22 @@ void AShaderWorldActor::ReadbacksManagement()
 ```
 
 ### CollisionManagement()
+- ThreadSafe
+	 - bool
+		 - bProcessingGroundCollision
+		 - bPreprocessingCollisionUpdate
+		 - EditRebuild：传递Bool值给 rebuild。
+	 - FSWCollisionManagementShareableData
+		 - CollisionShareable
+ - FRenderCommandFence
+	- 1
+- bool 
+	- RedbuildCollisionContext
+- Array
+	- CollisionWorkQueue：类型为FCollisionProcessingWork。
+	- CollisionReadToProcess
+
+
 ```c++
 void AShaderWorldActor::CollisionManagement(float& DeltaT)
 {
@@ -211,9 +227,86 @@ void AShaderWorldActor::CollisionManagement(float& DeltaT)
 }
 ```
 
-#
-
 #### SetupCollisions()
+```c++
+bool AShaderWorldActor::SetupCollisions()
+{
+	SW_FCT_CYCLE()
+
+	if (!bHadGeneratorAtRebuildTime)
+		return false;
+
+	if (!Shareable_ID.IsValid() || Meshes.Num() <= 0)
+		return false;
+
+	//初始化线程安全变量
+	if (!bProcessingGroundCollision.IsValid())
+		bProcessingGroundCollision = MakeShared<FThreadSafeBool, ESPMode::ThreadSafe>();
+	if (!bPreprocessingCollisionUpdate.IsValid())
+		bPreprocessingCollisionUpdate = MakeShared<FThreadSafeBool, ESPMode::ThreadSafe>();
+
+	if (EditRebuild)
+	{
+		EditRebuild.AtomicSet(false);
+		rebuild = true;
+	}
+
+	if (rebuild)
+		RedbuildCollisionContext = true;
+	//重建相关变量初始化
+	if (RedbuildCollisionContext)
+	{
+		if (!(*bProcessingGroundCollision.Get()) && !(*bPreprocessingCollisionUpdate.Get())
+			&& CollisionProcess.IsFenceComplete()
+			&& (CollisionMesh.Num() <= 0)
+			&& (UsedCollisionMesh.Num() <= 0))
+		{
+
+			CollisionShareable = nullptr;
+
+			CollisionWorkQueue.Empty();
+			CollisionReadToProcess.Empty();
+
+			RedbuildCollisionContext = false;
+
+		}
+	}
+
+	if (RedbuildCollisionContext)
+		return false;
+
+	if (!GenerateCollision)
+		return false;
+
+	if (!CollisionShareable.IsValid())
+		CollisionShareable = MakeShared<FSWCollisionManagementShareableData, ESPMode::ThreadSafe>(CollisionResolution, CollisionVerticesPerPatch);
+
+	if ((*bProcessingGroundCollision.Get()) || (*bPreprocessingCollisionUpdate.Get()) || !CameraSet || (Meshes.Num() == 0))
+		return false;
+
+	//Let the data layer be computed before generating collisions and trying to extract material IDs
+	if (bExportPhysicalMaterialID && (WorldCycle < 2))
+		return false;
+
+
+	if (CollisionVisibleChanged)
+	{
+		if (GetWorld())
+		{
+			for (auto& ColM : CollisionMesh)
+			{
+				if (auto& Mesh = ColM.Value.Mesh)
+				{
+					Mesh->SetMeshSectionVisible(0, CollisionVisible);
+				}
+			}
+		}
+		CollisionVisibleChanged.AtomicSet(false);
+	}
+
+	return true;
+}
+```
 
 ### SpawnablesManagement()