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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_MESH_CONTRACTOR_H
#define APEX_MESH_CONTRACTOR_H
#include "ApexDefs.h"
#include "ApexUsingNamespace.h"
#include "PsArray.h"
#include "PxVec3.h"
#include "PsUserAllocated.h"
namespace nvidia
{
namespace apex
{
class IProgressListener;
class ApexMeshContractor : public UserAllocated
{
public:
ApexMeshContractor();
void registerVertex(const PxVec3& pos);
void registerTriangle(uint32_t v0, uint32_t v1, uint32_t v2);
bool endRegistration(uint32_t subdivision, IProgressListener* progress);
uint32_t contract(int32_t steps, float abortionRatio, float& volumeRatio, IProgressListener* progress);
void expandBorder();
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:
void computeNeighbours();
void computeSignedDistanceField();
void contractionStep();
void computeAreaAndVolume(float& area, float& volume);
void addTriangle(const PxVec3& v0, const PxVec3& v1, const PxVec3& v2);
bool updateDistance(uint32_t xi, uint32_t yi, uint32_t zi);
void setInsideOutside();
void interpolateGradientAt(const PxVec3& pos, PxVec3& grad);
void subdivide(float spacing);
void collapse(float spacing);
void getButterfly(uint32_t triNr, uint32_t v0, uint32_t v1, int32_t& adj, int32_t& t0, int32_t& t1, int32_t& t2, int32_t& t3) const;
int32_t getOppositeVertex(int32_t t, uint32_t v0, uint32_t v1) const;
void replaceVertex(int32_t t, uint32_t vOld, uint32_t vNew);
void replaceNeighbor(int32_t t, int32_t nOld, uint32_t nNew);
bool triangleContains(int32_t t, uint32_t v) const;
bool legalCollapse(int32_t triNr, uint32_t v0, uint32_t v1) const;
void advanceAdjTriangle(uint32_t v, int32_t& t, int32_t& prev) const;
bool areNeighbors(int32_t t0, int32_t t1) const;
float findMin(const PxVec3& p, const PxVec3& maxDisp) const;
float interpolateDistanceAt(const PxVec3& pos) const;
void collectNeighborhood(int32_t triNr, float radius, uint32_t newMark, physx::Array<int32_t> &tris, physx::Array<float> &dists, uint32_t* triMarks) const;
void getTriangleCenter(int32_t triNr, PxVec3& center) const;
float curvatureAt(int triNr, int v);
struct ContractorCell
{
ContractorCell() : inside(0), distance(PX_MAX_F32), marked(false)
{
numCuts[0] = numCuts[1] = numCuts[2] = 0;
}
/*
void init() {
distance = PX_MAX_F32;
inside = 0;
marked = false;
numCuts[0] = 0;
numCuts[1] = 0;
numCuts[2] = 0;
}
*/
uint32_t inside;
float distance;
uint8_t numCuts[3];
bool marked;
};
inline ContractorCell& cellAt(int32_t xi, int32_t yi, int32_t zi)
{
return mGrid[(((uint32_t)xi * mNumY) + (uint32_t)yi) * mNumZ + (uint32_t)zi];
}
inline const ContractorCell& constCellAt(int32_t xi, int32_t yi, int32_t zi) const
{
return mGrid[(((uint32_t)xi * mNumY) + (uint32_t)yi) * mNumZ + (uint32_t)zi];
}
float mCellSize;
PxVec3 mOrigin;
uint32_t mNumX, mNumY, mNumZ;
physx::Array<PxVec3> mVertices;
physx::Array<uint32_t> mIndices;
physx::Array<int32_t> mNeighbours;
physx::Array<ContractorCell> mGrid;
physx::Array<float> mVertexCurvatures;
float mInitialVolume;
float mCurrentVolume;
};
}
} // end namespace nvidia::apex
#endif // APEX_MESH_CONTRACTOR_H
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