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// This code contains NVIDIA Confidential Information and is disclosed to you
// under a form of NVIDIA software license agreement provided separately to you.
//
// Notice
// NVIDIA Corporation and its licensors retain all intellectual property and
// proprietary rights in and to this software and related documentation and
// any modifications thereto. Any use, reproduction, disclosure, or
// distribution of this software and related documentation without an express
// license agreement from NVIDIA Corporation is strictly prohibited.
//
// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
//
// Information and code furnished is believed to be accurate and reliable.
// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
// information or for any infringement of patents or other rights of third parties that may
// result from its use. No license is granted by implication or otherwise under any patent
// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
// This code supersedes and replaces all information previously supplied.
// NVIDIA Corporation products are not authorized for use as critical
// components in life support devices or systems without express written approval of
// NVIDIA Corporation.
//
// Copyright (c) 2008-2020 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 "foundation/PxVec4.h"
#include "foundation/PxMemory.h"
#include "foundation/PxStrideIterator.h"
#include "NvClothExt/ClothTetherCooker.h"
#include "NvCloth/Allocator.h"
using namespace physx;
namespace nv
{
namespace cloth
{
struct ClothSimpleTetherCooker : public ClothTetherCooker
{
virtual bool cook(const ClothMeshDesc& desc) override;
virtual uint32_t getCookerStatus() const override; //From APEX
virtual void getTetherData(PxU32* userTetherAnchors, PxReal* userTetherLengths) const override;
virtual PxU32 getNbTethersPerParticle() const override{ return 1; }
public:
// output
nv::cloth::Vector<PxU32>::Type mTetherAnchors;
nv::cloth::Vector<PxReal>::Type mTetherLengths;
protected:
void createTetherData(const ClothMeshDesc &desc);
uint32_t mCookerStatus; //From APEX
};
///////////////////////////////////////////////////////////////////////////////
bool ClothSimpleTetherCooker::cook(const ClothMeshDesc &desc)
{
mCookerStatus = 1;
createTetherData(desc);
return getCookerStatus() == 0;
}
///////////////////////////////////////////////////////////////////////////////
void ClothSimpleTetherCooker::createTetherData(const ClothMeshDesc &desc)
{
PxU32 numParticles = desc.points.count;
if (!desc.invMasses.data)
return;
// assemble points
nv::cloth::Vector<PxVec4>::Type particles;
particles.reserve(numParticles);
PxStrideIterator<const PxVec3> pIt(reinterpret_cast<const PxVec3*>(desc.points.data), desc.points.stride);
PxStrideIterator<const PxReal> wIt(reinterpret_cast<const PxReal*>(desc.invMasses.data), desc.invMasses.stride);
for(PxU32 i=0; i<numParticles; ++i)
particles.pushBack(PxVec4(*pIt++, wIt.ptr() ? *wIt++ : 1.0f));
// compute tether data
nv::cloth::Vector<PxU32>::Type attachedIndices;
for(PxU32 i=0; i < numParticles; ++i)
if(particles[i].w == 0.0f)
attachedIndices.pushBack(i);
PxU32 n = attachedIndices.empty() ? 0 : numParticles;
for(PxU32 i=0; i < n; ++i)
{
mTetherAnchors.reserve(numParticles);
mTetherLengths.reserve(numParticles);
PxVec3 position = reinterpret_cast<const PxVec3&>(particles[i]);
float minSqrDist = FLT_MAX;
PxU32 minIndex = numParticles;
const PxU32 *aIt, *aEnd = attachedIndices.end();
for(aIt = attachedIndices.begin(); aIt != aEnd; ++aIt)
{
float sqrDist = (reinterpret_cast<const PxVec3&>(
particles[*aIt]) - position).magnitudeSquared();
if(minSqrDist > sqrDist)
{
minSqrDist = sqrDist;
minIndex = *aIt;
}
}
mTetherAnchors.pushBack(minIndex);
mTetherLengths.pushBack(PxSqrt(minSqrDist));
}
NV_CLOTH_ASSERT(mTetherAnchors.size() == mTetherLengths.size());
if (numParticles == mTetherAnchors.size() && numParticles == mTetherLengths.size())
{
mCookerStatus = 0;
}
}
///////////////////////////////////////////////////////////////////////////////
uint32_t ClothSimpleTetherCooker::getCookerStatus() const
{
return mCookerStatus;
}
///////////////////////////////////////////////////////////////////////////////
void
ClothSimpleTetherCooker::getTetherData(PxU32* userTetherAnchors, PxReal* userTetherLengths) const
{
PxMemCopy(userTetherAnchors, mTetherAnchors.begin(), mTetherAnchors.size() * sizeof(PxU32));
PxMemCopy(userTetherLengths, mTetherLengths.begin(), mTetherLengths.size() * sizeof(PxReal));
}
} // namespace cloth
} // namespace nv
NV_CLOTH_API(nv::cloth::ClothTetherCooker*) NvClothCreateSimpleTetherCooker()
{
return NV_CLOTH_NEW(nv::cloth::ClothSimpleTetherCooker);
}
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