Revision control
+ // Redistribution and use in source and binary forms, with or without
+ // modification, are permitted provided that the following conditions
+ // are met:
+ // * Redistributions of source code must retain the above copyright
+ // notice, this list of conditions and the following disclaimer.
+ // * Redistributions in binary form must reproduce the above copyright
+ // notice, this list of conditions and the following disclaimer in the
+ // documentation and/or other materials provided with the distribution.
+ // * Neither the name of NVIDIA CORPORATION nor the names of its
+ // contributors may be used to endorse or promote products derived
+ // from this software without specific prior written permission.
+ //
+ // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ''AS IS'' AND ANY
+ // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ // PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ //
+ // Copyright (c) 2008-2026 NVIDIA Corporation. All rights reserved.
+ // Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+ // Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
+
+ #include "PxParticleBuffer.h"
+ #include "extensions/PxCudaHelpersExt.h"
+ #include "extensions/PxParticleExt.h"
+
+ #include "foundation/PxUserAllocated.h"
+ #include "PxPhysics.h"
+ #include "cudamanager/PxCudaContextManager.h"
+ #include "cudamanager/PxCudaContext.h"
+
+ namespace physx
+ {
+ namespace ExtGpu
+ {
+
+ void PxDmaDataToDevice(PxCudaContextManager* cudaContextManager, PxParticleBuffer* particleBuffer, const PxParticleBufferDesc& desc)
+ {
+ #if PX_SUPPORT_GPU_PHYSX
+ cudaContextManager->acquireContext();
+
+ PxVec4* posInvMass = particleBuffer->getPositionInvMasses();
+ PxVec4* velocities = particleBuffer->getVelocities();
+ PxU32* phases = particleBuffer->getPhases();
+
+ PxCudaContext* cudaContext = cudaContextManager->getCudaContext();
+
+ cudaContext->memcpyHtoDAsync(CUdeviceptr(posInvMass), desc.positions, desc.numActiveParticles * sizeof(PxVec4), 0);
+ cudaContext->memcpyHtoDAsync(CUdeviceptr(velocities), desc.velocities, desc.numActiveParticles * sizeof(PxVec4), 0);
+ cudaContext->memcpyHtoDAsync(CUdeviceptr(phases), desc.phases, desc.numActiveParticles * sizeof(PxU32), 0);
+
+ particleBuffer->setNbActiveParticles(desc.numActiveParticles);
+
+ cudaContext->streamSynchronize(0);
+
+ cudaContextManager->releaseContext();
+ #else
+ PX_UNUSED(cudaContextManager);
+ PX_UNUSED(particleBuffer);
+ PX_UNUSED(desc);
+ #endif
+ }
+
+ PxParticleBuffer* PxCreateAndPopulateParticleBuffer(const PxParticleBufferDesc& desc, PxCudaContextManager* cudaContextManager)
+ {
+ PxParticleBuffer* particleBuffer = PxGetPhysics().createParticleBuffer(desc.maxParticles, cudaContextManager);
+ PxDmaDataToDevice(cudaContextManager, particleBuffer, desc);
+ return particleBuffer;
+ }
+
+ PxParticleAndDiffuseBuffer* PxCreateAndPopulateParticleAndDiffuseBuffer(const PxParticleAndDiffuseBufferDesc& desc, PxCudaContextManager* cudaContextManager)
+ {
+ PxParticleAndDiffuseBuffer* particleBuffer = PxGetPhysics().createParticleAndDiffuseBuffer(desc.maxParticles, desc.maxDiffuseParticles, cudaContextManager);
+ PxDmaDataToDevice(cudaContextManager, particleBuffer, desc);
+ particleBuffer->setMaxActiveDiffuseParticles(desc.maxActiveDiffuseParticles);
+ return particleBuffer;
+ }
+
+
+ } //namespace ExtGpu
+ } //namespace physx