vault backup: 2025-06-13 11:57:17
This commit is contained in:
parent
21fdd01786
commit
465483c3fc
@ -29,7 +29,7 @@ SWShaderToolBox::DrawMaterial
|
||||
DrawMaterial_CS_RT
|
||||
|
||||
调用路径：
|
||||
- AShaderWorldActor::RetrieveHeightAt（好像没有引用）：检索高度
|
||||
- AShaderWorldActor::[[#RetrieveHeightAt]]（好像没有引用）：检索高度
|
||||
- AShaderWorldActor::ComputeHeight_Segmented_MapForClipMap
|
||||
- AShaderWorldActor::ProcessSegmentedComputation() <- AShaderWorldActor::TerrainAndSpawnablesManagement() <- AShaderWorldActor::Tick()
|
||||
- AShaderWorldActor::ComputeHeightMapForClipMap
|
||||
@ -155,6 +155,244 @@ SWorldSubsystem->DrawMaterialToRenderTarget
|
||||
1. AShaderWorldActor::ComputeHeight_Segmented_MapForClipMap 十多次
|
||||
2. UpdateCollisionMeshData
|
||||
3. AShaderWorldActor::ComputeHeight_Segmented_MapForClipMap 十多次
|
||||
4. RetrieveHeightAt
|
||||
4. [[#RetrieveHeightAt]]
|
||||
5. UpdateCollisionMeshData 3次
|
||||
6. AShaderWorldActor::ComputeHeight_Segmented_MapForClipMap 十多次
|
||||
6. AShaderWorldActor::ComputeHeight_Segmented_MapForClipMap 十多次
|
||||
|
||||
# RetrieveHeightAt
|
||||
可能存在bug待排查的：
|
||||
- ShaderWorldSubsystem->LoadSampleLocationsInRT()
|
||||
- ShaderWorldSubsystem->DrawMaterialToRenderTarget()
|
||||
|
||||
## 相关变量
|
||||
- FThreadSafeBool
|
||||
- bProcessingHeightRetrieval
|
||||
- bProcessingHeightRetrievalRT
|
||||
- MID
|
||||
- GeneratorDynamicForReadBack
|
||||
- UShaderWorldRT2D（`UTextureRenderTarget2D`）
|
||||
- ReadRequestLocation：RTF_RG32f，初始化于`InitializeReadBackDependencies() <- InitiateWorld()`
|
||||
- ReadRequestLocationHeightmap：RTF_RGBA8，初始化于`InitializeReadBackDependencies() <- InitiateWorld()`
|
||||
|
||||
|
||||
|
||||
## 代码
|
||||
```c++
|
||||
bool AShaderWorldActor::RetrieveHeightAt(const TArray<FVector>& Origin, const FSWHeightRetrievalDelegate& Callback)
|
||||
{
|
||||
if (!GeneratorDynamicForReadBack || !SWorldSubsystem)
|
||||
return false;
|
||||
|
||||
if (!bProcessingHeightRetrieval.IsValid())
|
||||
{
|
||||
bProcessingHeightRetrieval = MakeShared<FThreadSafeBool, ESPMode::ThreadSafe>();
|
||||
bProcessingHeightRetrieval->AtomicSet(false);
|
||||
}
|
||||
if (!bProcessingHeightRetrievalRT.IsValid())
|
||||
{
|
||||
bProcessingHeightRetrievalRT = MakeShared<FThreadSafeBool, ESPMode::ThreadSafe>();
|
||||
bProcessingHeightRetrievalRT->AtomicSet(false);
|
||||
}
|
||||
|
||||
|
||||
if (!(*bProcessingHeightRetrieval.Get()) && ReadRequestLocation && ReadRequestLocationHeightmap && GeneratorDynamicForReadBack)
|
||||
{
|
||||
bProcessingHeightRetrieval->AtomicSet(true);
|
||||
bProcessingHeightRetrievalRT->AtomicSet(false);
|
||||
HeightRetrieveDelegate = Callback;
|
||||
|
||||
//初始化采样点数组结构体FSWShareableSamplePoints
|
||||
PointsPendingReadBacks = MakeShared<FSWShareableSamplePoints, ESPMode::ThreadSafe>();
|
||||
TSharedPtr<FSWShareableSamplePoints>& Samples = PointsPendingReadBacks;
|
||||
|
||||
FBox BoundingBoxRead(Origin);
|
||||
|
||||
Samples->PositionsXY.SetNum(25 * 2);
|
||||
for (int i = 0; i < 25; i++)
|
||||
{
|
||||
if (i < Origin.Num())
|
||||
{
|
||||
Samples->PositionsXY[i * 2] = Origin[i].X;
|
||||
Samples->PositionsXY[i * 2 + 1] = Origin[i].Y;
|
||||
}
|
||||
else
|
||||
{
|
||||
Samples->PositionsXY[i * 2] = 0.f;
|
||||
Samples->PositionsXY[i * 2 + 1] = 0.f;
|
||||
}
|
||||
}
|
||||
|
||||
if (USWorldSubsystem* ShaderWorldSubsystem = SWorldSubsystem)
|
||||
{
|
||||
//从渲染线程
|
||||
ShaderWorldSubsystem->LoadSampleLocationsInRT(ReadRequestLocation, Samples);
|
||||
|
||||
#if SW_COMPUTE_GENERATION
|
||||
ShaderWorldSubsystem->DrawMaterialToRenderTarget(
|
||||
{ false,
|
||||
false,
|
||||
GetWorld()->Scene,
|
||||
(float)GetWorld()->TimeSeconds,
|
||||
false,
|
||||
true,
|
||||
ReadRequestLocationHeightmap->SizeX,
|
||||
10,
|
||||
FVector(0.f),
|
||||
true,
|
||||
ReadRequestLocation,
|
||||
GeneratorDynamicForReadBack,
|
||||
ReadRequestLocationHeightmap
|
||||
});
|
||||
#else
|
||||
UKismetRenderingLibrary::DrawMaterialToRenderTarget(this, ReadRequestLocationHeightmap, GeneratorDynamicForReadBack);
|
||||
#endif
|
||||
|
||||
int32 Size_RT_Readback = ReadRequestLocationHeightmap.Get()->SizeX;
|
||||
|
||||
FVector Barycentre = BoundingBoxRead.GetCenter();
|
||||
FVector Extent = BoundingBoxRead.GetExtent();
|
||||
float gridspacing = Extent.X * 2.0 / (Size_RT_Readback - 1);
|
||||
|
||||
if (IsValid(BrushManager))
|
||||
BrushManager->ApplyBrushStackToHeightMap(this, 0, ReadRequestLocationHeightmap.Get(), Barycentre, gridspacing, Size_RT_Readback, true, true, ReadRequestLocation.Get());
|
||||
|
||||
|
||||
ReadBackHeightData = MakeShared<FSWColorRead, ESPMode::ThreadSafe>();
|
||||
ReadBackHeightData->ReadData.SetNum(25);
|
||||
|
||||
ENQUEUE_RENDER_COMMAND(ReadGeoClipMapRTCmd)(
|
||||
[InRT = ReadRequestLocationHeightmap, HeightData = ReadBackHeightData, Completion = bProcessingHeightRetrievalRT](FRHICommandListImmediate& RHICmdList)
|
||||
{
|
||||
check(IsInRenderingThread());
|
||||
|
||||
if (HeightData.IsValid() && InRT->GetResource())
|
||||
{
|
||||
FRDGBuilder GraphBuilder(RHICmdList);
|
||||
|
||||
TSharedPtr<FRHIGPUTextureReadback> ReadBackStaging = MakeShared<FRHIGPUTextureReadback>(TEXT("SWGPUTextureReadback"));
|
||||
|
||||
FRDGTextureRef RDGSourceTexture = RegisterExternalTexture(GraphBuilder, InRT->GetResource()->TextureRHI, TEXT("SWSourceTextureToReadbackTexture"));
|
||||
|
||||
AddEnqueueCopyPass(GraphBuilder, ReadBackStaging.Get(), RDGSourceTexture);
|
||||
|
||||
GraphBuilder.Execute();
|
||||
|
||||
ShaderWorld::GSWReadbackManager.AddPendingReadBack(RHICmdList, GPixelFormats[RDGSourceTexture->Desc.Format].BlockBytes, RDGSourceTexture->Desc.Extent.X, RDGSourceTexture->Desc.Extent.Y, ReadBackStaging, const_cast<TSharedPtr<FSWColorRead, ESPMode::ThreadSafe>&>(HeightData), const_cast<TSharedPtr < FThreadSafeBool, ESPMode::ThreadSafe>&>(Completion));
|
||||
|
||||
}
|
||||
|
||||
});
|
||||
|
||||
HeightReadBackFence.BeginFence(true);
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
return false;
|
||||
}
|
||||
```
|
||||
|
||||
|
||||
### RequestReadBackLoad
|
||||
```c++
|
||||
bool USWorldSubsystem::LoadSampleLocationsInRT(UShaderWorldRT2D* LocationsRequestedRT,
|
||||
TSharedPtr<FSWShareableSamplePoints>& Samples)
|
||||
{
|
||||
if (!RenderThreadResponded)
|
||||
return false;
|
||||
|
||||
const SWSampleRequestComputeData ReadBackData(LocationsRequestedRT, Samples);
|
||||
SWToolBox->RequestReadBackLoad(ReadBackData);
|
||||
return true;
|
||||
}
|
||||
```
|
||||
# SWShaderToolBox
|
||||
## RequestReadBackLoad
|
||||
```c++
|
||||
void SWShaderToolBox::RequestReadBackLoad(const SWSampleRequestComputeData& Data) const
|
||||
{
|
||||
if (Data.CPU)
|
||||
return CPUTools.RequestReadBackLoad(Data);
|
||||
|
||||
ENQUEUE_RENDER_COMMAND(ShaderTools_copy_rt)
|
||||
([this, Data](FRHICommandListImmediate& RHICmdList)
|
||||
{
|
||||
if (Data.SamplesXY && Data.SamplesXY->GetResource())
|
||||
RequestReadBackLoad_RT(RHICmdList,Data);
|
||||
}
|
||||
);
|
||||
|
||||
}
|
||||
|
||||
void SWShaderToolBox::RequestReadBackLoad_RT(FRHICommandListImmediate& RHICmdList, const SWSampleRequestComputeData& Data) const
|
||||
{
|
||||
if (!(Data.SamplesXY && Data.SamplesXY->GetResource()))
|
||||
return;
|
||||
|
||||
FRDGBuilder GraphBuilder(RHICmdList);
|
||||
|
||||
{
|
||||
RDG_EVENT_SCOPE(GraphBuilder, "ShaderWorld PositionReadBack");
|
||||
RDG_GPU_STAT_SCOPE(GraphBuilder, ShaderWorldReadBack);
|
||||
|
||||
FIntVector GroupCount;
|
||||
GroupCount.X = FMath::DivideAndRoundUp((float)Data.SamplesXY->GetResource()->GetSizeX(), (float)SW_LoadReadBackLocations_GroupSizeX);
|
||||
GroupCount.Y = FMath::DivideAndRoundUp((float)Data.SamplesXY->GetResource()->GetSizeY(), (float)SW_LoadReadBackLocations_GroupSizeY);
|
||||
GroupCount.Z = 1;
|
||||
|
||||
const FUnorderedAccessViewRHIRef RT_UAV = GraphBuilder.RHICmdList.CreateUnorderedAccessView(Data.SamplesXY->GetResource()->TextureRHI);
|
||||
|
||||
const FRDGBufferRef LocationRequest = CreateUploadBuffer(
|
||||
GraphBuilder,
|
||||
TEXT("SWLoadSampleLocations"),
|
||||
sizeof(float),
|
||||
Data.SamplesSource->PositionsXY.Num(),
|
||||
Data.SamplesSource->PositionsXY.GetData(),
|
||||
Data.SamplesSource->PositionsXY.Num() * Data.SamplesSource->PositionsXY.GetTypeSize()
|
||||
);
|
||||
|
||||
const FRDGBufferSRVRef LocationRequestSRV = GraphBuilder.CreateSRV(FRDGBufferSRVDesc(LocationRequest, PF_R32_FLOAT));;
|
||||
|
||||
FLoadReadBackLocations_CS::FPermutationDomain PermutationVector;
|
||||
TShaderMapRef<FLoadReadBackLocations_CS> ComputeShader(GetGlobalShaderMap(GMaxRHIFeatureLevel), PermutationVector);
|
||||
|
||||
FLoadReadBackLocations_CS::FParameters* PassParameters = GraphBuilder.AllocParameters<FLoadReadBackLocations_CS::FParameters>();
|
||||
PassParameters->SampleDim = Data.SamplesXY->GetResource()->GetSizeX();
|
||||
PassParameters->DestLocationsTex = RT_UAV;
|
||||
PassParameters->SourceLocationBuffer = LocationRequestSRV;
|
||||
|
||||
|
||||
GraphBuilder.AddPass(
|
||||
RDG_EVENT_NAME("ShaderWorld LoadReadBacklocations_CS"),
|
||||
PassParameters,
|
||||
ERDGPassFlags::Compute |
|
||||
ERDGPassFlags::NeverCull,
|
||||
[PassParameters, ComputeShader, GroupCount](FRHICommandList& RHICmdList)
|
||||
{
|
||||
FComputeShaderUtils::Dispatch(RHICmdList, ComputeShader, *PassParameters, GroupCount);
|
||||
});
|
||||
|
||||
}
|
||||
|
||||
GraphBuilder.Execute();
|
||||
}
|
||||
```
|
||||
|
||||
FLoadReadBackLocations_CS
|
||||
```c++
|
||||
uint SampleDim;
|
||||
RWTexture2D<float2> DestLocationsTex;
|
||||
Buffer<float> SourceLocationBuffer;
|
||||
|
||||
[numthreads(THREADGROUP_SIZEX, THREADGROUP_SIZEY, THREADGROUP_SIZEZ)]
|
||||
void SampleLocationLoaderCS(uint3 ThreadId : SV_DispatchThreadID)
|
||||
{
|
||||
if (any(ThreadId.xy >= SampleDim.xx))
|
||||
return;
|
||||
|
||||
uint IndexPixel = (ThreadId.x + ThreadId.y * SampleDim) * 2;
|
||||
|
||||
DestLocationsTex[ThreadId.xy] = float2(SourceLocationBuffer[IndexPixel],SourceLocationBuffer[IndexPixel + 1]);
|
||||
}
|
||||
```
|
||||
Loading…
x
Reference in New Issue
Block a user