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

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title	date	excerpt	tags	rating
Untitled	2025-06-03 10:19:25			⭐

前言

1. ShaderWorldPCGInterop：
2. ShaderWorld：
3. ShaderWorldCore：

ShaderWorld

• Class
  • Actor
    • ShaderWorldActor.h:#AShaderWorldActor
    • SWorld.h:#ASWorld

ASWorld

AShaderWorldActor

DrawMaterialToRenderTarget

USWorldSubsystem::DrawMaterialToRenderTarget => SWShaderToolBox::DrawMaterial => DrawMaterial_CS_RT

调用路径：

• AShaderWorldActor::RetrieveHeightAt（好像没有引用）：检索高度
• AShaderWorldActor::ComputeHeight_Segmented_MapForClipMap
  • AShaderWorldActor::ProcessSegmentedComputation() <- AShaderWorldActor::TerrainAndSpawnablesManagement() <- AShaderWorldActor::Tick()
• AShaderWorldActor::ComputeHeightMapForClipMap
  • AShaderWorldActor::UpdateClipMap() <- AShaderWorldActor::TerrainAndSpawnablesManagement() <- AShaderWorldActor::Tick()
• AShaderWorldActor::ComputeDataLayersForClipMap
  • AShaderWorldActor::UpdateClipMap() <- AShaderWorldActor::TerrainAndSpawnablesManagement() <- AShaderWorldActor::Tick()
• AShaderWorldActor::UpdateCollisionMeshData：更新碰撞模型数据。
  • AShaderWorldActor::CollisionGPU() <- AShaderWorldActor::CollisionManagement() <- AShaderWorldActor::Tick()
• FSpawnableMesh::UpdateSpawnableData
  • AShaderWorldActor::ProcessSegmentedComputation() <- AShaderWorldActor::TerrainAndSpawnablesManagement() <- AShaderWorldActor::Tick()

Cache机制

AShaderWorldActor::ProcessSegmentedComputation() <- AShaderWorldActor::TerrainAndSpawnablesManagement() <- AShaderWorldActor::Tick()

其他Bug

CacheMatDyn？ MatDyn？

SetTextureParameterValue相关逻辑排查

• AShaderWorldActor中的SetTextureParameterValue
  • ExportCacheInBounds
  • AssignHeightMapToDynamicMaterial
  • UpdateStaticDataFor
  • ComputeHeight_Segmented_MapForClipMap：似乎会设置
  • UpdateCollisionMeshData
  • InitializeReadBackDependencies
  • InitiateMaterials

ComputeHeight_Segmented_MapForClipMap

InitiateMaterials

初始化TArray<FClipMapMeshElement> Meshes;的Material、Producers BeginPlay() -> InitiateWorld() -> InitiateMaterials()