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- // Copyright (c) 2008-2026 NVIDIA Corporation. All rights reserved.
+ // Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
- // Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
+ // SPDX-FileCopyrightText: Copyright (c) 2008-2026 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
+ // SPDX-License-Identifier: Apache-2.0
#include "GuVertexReducer.h"
#include "foundation/PxAllocator.h"
#include "CmRadixSort.h"
using namespace physx;
using namespace Gu;
using namespace Cm;
// PT: code archeology: this initially came from ICE (IceVertexCloud.h/cpp). Consider dropping it.
ReducedVertexCloud::ReducedVertexCloud(const PxVec3* verts, PxU32 nb_verts) : mNbRVerts(0), mRVerts(NULL), mXRef(NULL)
{
mVerts = verts;
mNbVerts = nb_verts;
}
ReducedVertexCloud::~ReducedVertexCloud()
{
clean();
}
ReducedVertexCloud& ReducedVertexCloud::clean()
{
PX_FREE(mXRef);
PX_FREE(mRVerts);
return *this;
}
/**
* Reduction method. Use this to create a minimal vertex cloud.
* \param rc [out] result structure
* \return true if success
* \warning This is not about welding nearby vertices, here we look for real redundant ones.
*/
bool ReducedVertexCloud::reduce(REDUCEDCLOUD* rc)
{
clean();
mXRef = PX_ALLOCATE(PxU32, mNbVerts, "mXRef");
float* f = PX_ALLOCATE(float, mNbVerts, "tmp");
for(PxU32 i=0;i<mNbVerts;i++)
f[i] = mVerts[i].x;
RadixSortBuffered Radix;
Radix.Sort(reinterpret_cast<const PxU32*>(f), mNbVerts, RADIX_UNSIGNED);
for(PxU32 i=0;i<mNbVerts;i++)
f[i] = mVerts[i].y;
Radix.Sort(reinterpret_cast<const PxU32*>(f), mNbVerts, RADIX_UNSIGNED);
for(PxU32 i=0;i<mNbVerts;i++)
f[i] = mVerts[i].z;
const PxU32* Sorted = Radix.Sort(reinterpret_cast<const PxU32*>(f), mNbVerts, RADIX_UNSIGNED).GetRanks();
PX_FREE(f);
mNbRVerts = 0;
const PxU32 Junk[] = {PX_INVALID_U32, PX_INVALID_U32, PX_INVALID_U32};
const PxU32* Previous = Junk;
mRVerts = PX_ALLOCATE(PxVec3, mNbVerts, "PxVec3");
PxU32 Nb = mNbVerts;
while(Nb--)
{
const PxU32 Vertex = *Sorted++; // Vertex number
const PxU32* current = reinterpret_cast<const PxU32*>(&mVerts[Vertex]);
if(current[0]!=Previous[0] || current[1]!=Previous[1] || current[2]!=Previous[2])
mRVerts[mNbRVerts++] = mVerts[Vertex];
Previous = current;
mXRef[Vertex] = mNbRVerts-1;
}
if(rc)
{
rc->CrossRef = mXRef;
rc->NbRVerts = mNbRVerts;
rc->RVerts = mRVerts;
}
return true;
}