GoaLitiuM/FlaxEngine
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Optimize sorted particle indices format to 16-bit for small emitters

Browse Source
This commit is contained in:
Wojtek Figat
2025-08-08 18:46:10 +02:00
parent 854f3acd4c
commit 3907bc4957
2 changed files with 45 additions and 16 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
Source/Engine/Particles/ParticlesData.cpp
View File

@@ -164,26 +164,33 @@ bool ParticleBuffer::AllocateSortBuffer()
ASSERT(Emitter && GPU.SortedIndices == nullptr && GPU.SortingKeys == nullptr);
if (Emitter->Graph.SortModules.IsEmpty())
return false;
const int32 sortedIndicesCount = Capacity * Emitter->Graph.SortModules.Count();
uint32 indexSize = sizeof(uint32);
PixelFormat indexFormat = PixelFormat::R32_UInt;
if (Capacity <= MAX_uint16)
{
// 16-bit indices
indexSize = sizeof(uint16);
indexFormat = PixelFormat::R16_UInt;
}
switch (Mode)
{
case ParticlesSimulationMode::CPU:
{
const int32 sortedIndicesSize = Capacity * sizeof(uint32) * Emitter->Graph.SortModules.Count();
GPU.SortedIndices = GPUDevice::Instance->CreateBuffer(TEXT("ParticleSortedIndices"));
if (GPU.SortedIndices->Init(GPUBufferDescription::Buffer(sortedIndicesSize, GPUBufferFlags::ShaderResource, PixelFormat::R32_UInt, nullptr, sizeof(uint32), GPUResourceUsage::Dynamic)))
if (GPU.SortedIndices->Init(GPUBufferDescription::Buffer(sortedIndicesCount * indexSize, GPUBufferFlags::ShaderResource, indexFormat, nullptr, indexSize, GPUResourceUsage::Dynamic)))
return true;
break;
}
#if COMPILE_WITH_GPU_PARTICLES
case ParticlesSimulationMode::GPU:
{
const int32 sortedIndicesCount = Capacity * Emitter->Graph.SortModules.Count();
GPU.SortingKeys = GPUDevice::Instance->CreateBuffer(TEXT("ParticleSortingKeys"));
if (GPU.SortingKeys->Init(GPUBufferDescription::Buffer(sortedIndicesCount * sizeof(float), GPUBufferFlags::UnorderedAccess, PixelFormat::R32_Float, nullptr, sizeof(float))))
if (GPU.SortingKeys->Init(GPUBufferDescription::Buffer(sortedIndicesCount * sizeof(float), GPUBufferFlags::ShaderResource | GPUBufferFlags::UnorderedAccess, PixelFormat::R32_Float, nullptr, sizeof(float))))
return true;
GPU.SortedIndices = GPUDevice::Instance->CreateBuffer(TEXT("ParticleSortedIndices"));
if (GPU.SortedIndices->Init(GPUBufferDescription::Buffer(sortedIndicesCount * sizeof(uint32), GPUBufferFlags::ShaderResource | GPUBufferFlags::UnorderedAccess, PixelFormat::R32_UInt, nullptr, sizeof(uint32))))
if (GPU.SortedIndices->Init(GPUBufferDescription::Buffer(sortedIndicesCount * indexSize, GPUBufferFlags::ShaderResource | GPUBufferFlags::UnorderedAccess, indexFormat, nullptr, indexSize)))
return true;
break;
}