Program Listing for include/PxParticleGpu.h
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// Copyright (c) 2008-2023 NVIDIA Corporation. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
#ifndef PX_GPU_PARTICLE_SYSTEM_H
#define PX_GPU_PARTICLE_SYSTEM_H
#include "foundation/PxSimpleTypes.h"
#include "foundation/PxVec3.h"
#include "PxParticleSystem.h"
#if !PX_DOXYGEN
namespace physx
{
#endif
struct PxsParticleMaterialData
{
PxReal friction; // 4
PxReal damping; // 8
PxReal adhesion; // 12
PxReal gravityScale; // 16
PxReal adhesionRadiusScale; // 20
};
#if !PX_DOXYGEN
} // namespace physx
#endif
#if PX_SUPPORT_GPU_PHYSX
struct float4;
PX_CUDA_CALLABLE inline physx::PxU32 PxGetGroup(physx::PxU32 phase) { return phase & physx::PxParticlePhaseFlag::eParticlePhaseGroupMask; }
PX_CUDA_CALLABLE inline bool PxGetFluid(physx::PxU32 phase) { return (phase & physx::PxParticlePhaseFlag::eParticlePhaseFluid) != 0; }
PX_CUDA_CALLABLE inline bool PxGetSelfCollide(physx::PxU32 phase) { return (phase & physx::PxParticlePhaseFlag::eParticlePhaseSelfCollide) != 0; }
PX_CUDA_CALLABLE inline bool PxGetSelfCollideFilter(physx::PxU32 phase) { return (phase & physx::PxParticlePhaseFlag::eParticlePhaseSelfCollideFilter) != 0; }
#if !PX_DOXYGEN
namespace physx
{
#endif
class PxNeighborhoodIterator
{
const PxU32* PX_RESTRICT mCollisionIndex;
PxU32 mMaxParticles;
public:
PX_CUDA_CALLABLE PxNeighborhoodIterator(const PxU32* PX_RESTRICT collisionIndex, PxU32 maxParticles) :
mCollisionIndex(collisionIndex), mMaxParticles(maxParticles)
{
}
PX_CUDA_CALLABLE PxU32 getNextIndex()
{
PxU32 result = *mCollisionIndex;
mCollisionIndex += mMaxParticles;
return result;
}
PX_INLINE PxNeighborhoodIterator(const PxNeighborhoodIterator& params)
{
mCollisionIndex = params.mCollisionIndex;
mMaxParticles = params.mMaxParticles;
}
PX_INLINE void operator = (const PxNeighborhoodIterator& params)
{
mCollisionIndex = params.mCollisionIndex;
mMaxParticles = params.mMaxParticles;
}
};
struct PxGpuParticleData
{
PxVec3 mPeriod;
PxU32 mGridSizeX;
PxU32 mGridSizeY;
PxU32 mGridSizeZ;
PxReal mParticleContactDistance;
PxReal mParticleContactDistanceInv;
PxReal mParticleContactDistanceSq;
PxU32 mNumParticles;
PxU32 mMaxParticles;
PxU32 mMaxNeighborhood;
PxU32 mMaxDiffuseParticles;
PxU32 mNumParticleBuffers;
};
class PxGpuParticleSystem
{
public:
PX_FORCE_INLINE PxU32 getNumCells() { return mCommonData.mGridSizeX * mCommonData.mGridSizeY * mCommonData.mGridSizeZ; }
/* Unsorted particle state buffers */
float4* mUnsortedPositions_InvMass;
float4* mUnsortedVelocities;
PxU32* mUnsortedPhaseArray;
/* Sorted particle state buffers. Sorted by increasing hash value in background grid. */
float4* mSortedPositions_InvMass;
float4* mSortedVelocities;
PxU32* mSortedPhaseArray;
/* Mappings to/from sorted particle states */
PxU32* mUnsortedToSortedMapping;
PxU32* mSortedToUnsortedMapping;
/* Neighborhood information */
PxU32* mParticleSelfCollisionCount;
PxU32* mCollisionIndex;
PxsParticleMaterialData* mParticleMaterials;
PxGpuParticleData mCommonData;
PX_CUDA_CALLABLE PxNeighborhoodIterator getIterator(PxU32 particleId) const
{
return PxNeighborhoodIterator(mCollisionIndex + particleId, mCommonData.mMaxParticles);
}
};
#if !PX_DOXYGEN
} // namespace physx
#endif
#endif
#endif