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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) 2008-2013 NVIDIA Corporation. All rights reserved.
#ifndef CONVEX_DECOMPOSITION_H
#define CONVEX_DECOMPOSITION_H
#include "foundation/PxSimpleTypes.h"
namespace CONVEX_DECOMPOSITION
{
class TriangleMesh
{
public:
TriangleMesh(void)
{
mVcount = 0;
mVertices = NULL;
mTriCount = 0;
mIndices = NULL;
}
physx::PxU32 mVcount;
physx::PxF32 *mVertices;
physx::PxU32 mTriCount;
physx::PxU32 *mIndices;
};
class ConvexResult
{
public:
ConvexResult(void)
{
mHullVcount = 0;
mHullVertices = 0;
mHullTcount = 0;
mHullIndices = 0;
}
// the convex hull.result
physx::PxU32 mHullVcount; // Number of vertices in this convex hull.
physx::PxF32 *mHullVertices; // The array of vertices (x,y,z)(x,y,z)...
physx::PxU32 mHullTcount; // The number of triangles int he convex hull
physx::PxU32 *mHullIndices; // The triangle indices (0,1,2)(3,4,5)...
physx::PxF32 mHullVolume; // the volume of the convex hull.
};
// just to avoid passing a zillion parameters to the method the
// options are packed into this descriptor.
class DecompDesc
{
public:
DecompDesc(void)
{
mVcount = 0;
mVertices = 0;
mTcount = 0;
mIndices = 0;
mDepth = 10;
mCpercent = 4;
mPpercent = 4;
mVpercent = 0.2f;
mMaxVertices = 32;
mSkinWidth = 0;
mRemoveTjunctions = false;
mInitialIslandGeneration = false;
mUseIslandGeneration = false;
mClosedSplit = false;
mUseHACD = false;
mConcavityHACD = 100;
mMinClusterSizeHACD = 10;
mConnectionDistanceHACD = 0;
}
// describes the input triangle.
physx::PxU32 mVcount; // the number of vertices in the source mesh.
const physx::PxF32 *mVertices; // start of the vertex position array. Assumes a stride of 3 doubles.
physx::PxU32 mTcount; // the number of triangles in the source mesh.
const physx::PxU32 *mIndices; // the indexed triangle list array (zero index based)
// options
physx::PxU32 mDepth; // depth to split, a maximum of 10, generally not over 7.
physx::PxF32 mCpercent; // the concavity threshold percentage. 0=20 is reasonable.
physx::PxF32 mPpercent; // the percentage volume conservation threshold to collapse hulls. 0-30 is reasonable.
physx::PxF32 mVpercent; // the pecentage of total mesh volume before we stop splitting.
bool mInitialIslandGeneration; // true if the initial mesh should be subjected to island generation.
bool mUseIslandGeneration; // true if the decomposition code should break the input mesh and split meshes into discrete 'islands/pieces'
bool mRemoveTjunctions; // whether or not to initially remove tjunctions found in the original mesh.
bool mClosedSplit; // true if the hulls should be closed as they are split
bool mUseHACD; // True if using the hierarchical approximate convex decomposition algorithm; recommended
physx::PxF32 mConcavityHACD; // The concavity value to use for HACD (not the same as concavity percentage used with ACD.
physx::PxU32 mMinClusterSizeHACD; // Minimum number of clusters to consider.
physx::PxF32 mConnectionDistanceHACD; // The connection distance for HACD
// hull output limits.
physx::PxU32 mMaxVertices; // maximum number of vertices in the output hull. Recommended 32 or less.
physx::PxF32 mSkinWidth; // a skin width to apply to the output hulls.
};
class ConvexDecomposition
{
public:
virtual physx::PxU32 performConvexDecomposition(const DecompDesc &desc) = 0; // returns the number of hulls produced.
virtual void release(void) = 0;
virtual ConvexResult * getConvexResult(physx::PxU32 index) = 0;
virtual void splitMesh(const physx::PxF32 *planeEquation,const TriangleMesh &input,TriangleMesh &left,TriangleMesh &right,bool closedMesh) = 0;
virtual void releaseTriangleMeshMemory(TriangleMesh &mesh) = 0;
protected:
virtual ~ConvexDecomposition(void) { };
};
ConvexDecomposition * createConvexDecomposition(void);
};
#endif
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