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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) 2008-2017 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/PxMemory.h"
#include "PxSmoothNormals.h"
#include "PsMathUtils.h"
#include "PsUserAllocated.h"
#include "PsUtilities.h"
#include "CmPhysXCommon.h"
using namespace physx;
static PxReal computeAngle(const PxVec3* verts, const PxU32* refs, PxU32 vref)
{
PxU32 e0=0,e2=0;
if(vref==refs[0])
{
e0 = 2;
e2 = 1;
}
else if(vref==refs[1])
{
e0 = 2;
e2 = 0;
}
else if(vref==refs[2])
{
e0 = 0;
e2 = 1;
}
else
{
PX_ASSERT(0);
}
const PxVec3 edge0 = verts[refs[e0]] - verts[vref];
const PxVec3 edge1 = verts[refs[e2]] - verts[vref];
return Ps::angle(edge0, edge1);
}
bool PxBuildSmoothNormals(PxU32 nbTris, PxU32 nbVerts, const PxVec3* verts, const PxU32* dFaces, const PxU16* wFaces, PxVec3* normals, bool flip)
{
if(!verts || !normals || !nbTris || !nbVerts)
return false;
// Get correct destination buffers
// - if available, write directly to user-provided buffers
// - else get some ram and keep track of it
PxVec3* FNormals = reinterpret_cast<PxVec3*>(PX_ALLOC_TEMP(sizeof(PxVec3)*nbTris, "PxVec3"));
if(!FNormals) return false;
// Compute face normals
const PxU32 c = PxU32(flip!=0);
for(PxU32 i=0; i<nbTris; i++)
{
// compute indices outside of array index to workaround
// SNC bug which was generating incorrect addresses
const PxU32 i0 = i*3+0;
const PxU32 i1 = i*3+1+c;
const PxU32 i2 = i*3+2-c;
const PxU32 Ref0 = dFaces ? dFaces[i0] : wFaces ? wFaces[i0] : 0;
const PxU32 Ref1 = dFaces ? dFaces[i1] : wFaces ? wFaces[i1] : 1;
const PxU32 Ref2 = dFaces ? dFaces[i2] : wFaces ? wFaces[i2] : 2;
FNormals[i] = (verts[Ref2]-verts[Ref0]).cross(verts[Ref1] - verts[Ref0]);
PX_ASSERT(!FNormals[i].isZero());
FNormals[i].normalize();
}
// Compute vertex normals
PxMemSet(normals, 0, nbVerts*sizeof(PxVec3));
// TTP 3751
PxVec3* TmpNormals = reinterpret_cast<PxVec3*>(PX_ALLOC_TEMP(sizeof(PxVec3)*nbVerts, "PxVec3"));
PxMemSet(TmpNormals, 0, nbVerts*sizeof(PxVec3));
for(PxU32 i=0;i<nbTris;i++)
{
PxU32 Ref[3];
Ref[0] = dFaces ? dFaces[i*3+0] : wFaces ? wFaces[i*3+0] : 0;
Ref[1] = dFaces ? dFaces[i*3+1] : wFaces ? wFaces[i*3+1] : 1;
Ref[2] = dFaces ? dFaces[i*3+2] : wFaces ? wFaces[i*3+2] : 2;
for(PxU32 j=0;j<3;j++)
{
if(TmpNormals[Ref[j]].isZero())
TmpNormals[Ref[j]] = FNormals[i];
}
}
//~TTP 3751
for(PxU32 i=0;i<nbTris;i++)
{
PxU32 Ref[3];
Ref[0] = dFaces ? dFaces[i*3+0] : wFaces ? wFaces[i*3+0] : 0;
Ref[1] = dFaces ? dFaces[i*3+1] : wFaces ? wFaces[i*3+1] : 1;
Ref[2] = dFaces ? dFaces[i*3+2] : wFaces ? wFaces[i*3+2] : 2;
normals[Ref[0]] += FNormals[i] * computeAngle(verts, Ref, Ref[0]);
normals[Ref[1]] += FNormals[i] * computeAngle(verts, Ref, Ref[1]);
normals[Ref[2]] += FNormals[i] * computeAngle(verts, Ref, Ref[2]);
}
// Normalize vertex normals
for(PxU32 i=0;i<nbVerts;i++)
{
if(normals[i].isZero())
normals[i] = TmpNormals[i];
// PX_ASSERT(!normals[i].isZero());
normals[i].normalize();
}
PX_FREE_AND_RESET(TmpNormals); // TTP 3751
PX_FREE_AND_RESET(FNormals);
return true;
}
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