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Add minor optimizations to particles drawing

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This commit is contained in:
Wojtek Figat
2025-08-08 13:11:05 +02:00
parent 0369d9b2cb
commit 90d1e63b58
5 changed files with 33 additions and 38 deletions
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4
Source/Engine/Particles/Particles.cpp
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@@ -845,6 +845,7 @@ void DrawEmittersGPU(RenderContextBatch& renderContextBatch)
if (sorting)
{
PROFILE_GPU_CPU_NAMED("Sort Particles");
context->BindCB(0, GPUParticlesSortingCB);
// Generate sort keys for each particle
for (const GPUEmitterDraw& draw : GPUEmitterDraws)
@@ -917,7 +918,6 @@ void DrawEmittersGPU(RenderContextBatch& renderContextBatch)
#endif
}
context->UpdateCB(GPUParticlesSortingCB, &data);
context->BindCB(0, GPUParticlesSortingCB);
context->BindSR(0, draw.Buffer->GPU.Buffer->View());
context->BindUA(0, draw.Buffer->GPU.SortingKeysBuffer->View());
const int32 threadGroupSize = 1024;
@@ -939,7 +939,7 @@ void DrawEmittersGPU(RenderContextBatch& renderContextBatch)
auto module = emitter->Graph.SortModules[moduleIndex];
const auto sortMode = (ParticleSortMode)module->Values[2].AsInt;
bool sortAscending = sortMode == ParticleSortMode::CustomAscending;
BitonicSort::Instance()->Sort(context, draw.Buffer->GPU.SortingKeysBuffer, draw.Buffer->GPU.Buffer, draw.Buffer->GPU.ParticleCounterOffset, sortAscending, draw.Buffer->GPU.SortedIndices);
BitonicSort::Instance()->Sort(context, draw.Buffer->GPU.SortingKeysBuffer, draw.Buffer->GPU.Buffer, draw.Buffer->GPU.ParticleCounterOffset, sortAscending, draw.Buffer->GPU.SortedIndices, draw.Buffer->GPU.ParticlesCountMax);
// TODO: split sorted keys copy with another loop to give time for UAV transition
// TODO: use args buffer from GPUIndirectArgsBuffer instead of internal from BitonicSort to get rid of UAV barrier
}