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//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of NVIDIA CORPORATION nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
// OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Copyright (c) 2018 NVIDIA Corporation. All rights reserved.
#ifndef __APEX_GENERALIZED_MARCHING_CUBES_H__
#define __APEX_GENERALIZED_MARCHING_CUBES_H__
#include "ApexUsingNamespace.h"
#include "PsUserAllocated.h"
#include "PsArray.h"
#include "PxBounds3.h"
namespace nvidia
{
namespace apex
{
class IProgressListener;
class ApexGeneralizedCubeTemplates;
class ApexGeneralizedMarchingCubes : public UserAllocated
{
public:
ApexGeneralizedMarchingCubes(const PxBounds3& bound, uint32_t subdivision);
~ApexGeneralizedMarchingCubes();
void release();
void registerTriangle(const PxVec3& p0, const PxVec3& p1, const PxVec3& p2);
bool endRegistration(uint32_t bubleSizeToRemove, IProgressListener* progress);
uint32_t getNumVertices()
{
return mVertices.size();
}
uint32_t getNumIndices()
{
return mIndices.size();
}
const PxVec3* getVertices()
{
return mVertices.begin();
}
const uint32_t* getIndices()
{
return mIndices.begin();
}
private:
struct GeneralizedVertRef
{
void init()
{
vertNr = -1;
dangling = false;
deleted = false;
}
int32_t vertNr;
bool dangling;
bool deleted;
};
struct GeneralizedCube
{
void init(int32_t xi, int32_t yi, int32_t zi)
{
this->xi = xi;
this->yi = yi;
this->zi = zi;
next = -1;
vertRefs[0].init();
vertRefs[1].init();
vertRefs[2].init();
sideVertexNr[0] = -1;
sideVertexNr[1] = -1;
sideVertexNr[2] = -1;
sideBounds[0].setEmpty();
sideBounds[1].setEmpty();
sideBounds[2].setEmpty();
firstTriangle = -1;
numTriangles = 0;
deleted = false;
}
int32_t xi, yi, zi;
int32_t next;
GeneralizedVertRef vertRefs[3];
int32_t sideVertexNr[3];
PxBounds3 sideBounds[3];
int32_t firstTriangle;
uint32_t numTriangles;
bool deleted;
};
inline int hashFunction(int xi, int yi, int zi)
{
int h = (int)(unsigned int)((xi * 92837111) ^(yi * 689287499) ^(zi * 283923481));
return h % HASH_INDEX_SIZE;
}
int32_t createCube(int32_t xi, int32_t yi, int32_t zi);
int32_t findCube(int32_t xi, int32_t yi, int32_t zi);
void completeCells();
void createTrianglesForCube(int32_t cellNr);
void createNeighbourInfo();
void getCubeEdgesAndGroups(int32_t cellNr, GeneralizedVertRef* vertRefs[12], int32_t groups[8]);
void determineGroups();
void removeBubbles(int32_t minGroupSize);
void fixOrientations();
void compress();
PxBounds3 mBound;
float mSpacing;
float mInvSpacing;
physx::Array<GeneralizedCube> mCubes;
enum { HASH_INDEX_SIZE = 170111 };
int32_t mFirstCube[HASH_INDEX_SIZE];
physx::Array<PxVec3> mVertices;
physx::Array<uint32_t> mIndices;
physx::Array<int32_t> mFirstNeighbour;
physx::Array<int32_t> mNeighbours;
physx::Array<uint8_t> mTriangleDeleted;
physx::Array<int32_t> mGeneralizedTriangles;
physx::Array<int32_t> mCubeQueue;
physx::Array<int32_t> mTriangleGroup;
physx::Array<int32_t> mGroupFirstTriangle;
physx::Array<int32_t> mGroupTriangles;
ApexGeneralizedCubeTemplates* mTemplates;
// for debugging only
public:
physx::Array<PxVec3> mDebugLines;
};
}
} // end namespace nvidia::apex
#endif
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