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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) 2016-2017 NVIDIA Corporation. All rights reserved.
#ifndef NVBLASTEXTAUTHORINGACCELERATOR_H
#define NVBLASTEXTAUTHORINGACCELERATOR_H
#include <set>
#include <vector>
#include "NvBlastExtAuthoringTypes.h"
namespace Nv
{
namespace Blast
{
class Mesh;
/**
Acceleration structure interface.
*/
class SpatialAccelerator
{
public:
/**
Set state of accelerator to return all facets which possibly can intersect given facet.
\param[in] pos Vertex buffer
\param[in] ed Edge buffer
\param[in] fc Facet which should be tested.
*/
virtual void setState(const Vertex* pos, const Edge* ed, const Facet& fc) = 0;
/**
Set state of accelerator to return all facets which possibly can cover given point. Needed for testing whether point is inside mesh.
\param[in] point Point which should be tested.
*/
virtual void setState(const physx::PxVec3& point) = 0;
/**
Recieve next facet for setted state.
\return Next facet index, or -1 if no facets left.
*/
virtual int32_t getNextFacet() = 0;
virtual ~SpatialAccelerator() {};
};
/**
Dummy accelerator iterates through all facets of mesh.
*/
class DummyAccelerator : public SpatialAccelerator
{
public:
/**
\param[in] count Mesh facets count for which accelerator should be built.
*/
DummyAccelerator(int32_t count);
virtual void setState(const Vertex* pos, const Edge* ed, const Facet& fc);
virtual void setState(const physx::PxVec3& point);
virtual int32_t getNextFacet();
private:
int32_t count;
int32_t current;
};
/**
Accelerator which builds map from 3d grid to initial mesh facets.
To find all facets which possibly intersect given one, it return all facets which are pointed by grid cells, which intersects with bounding box of given facet.
To find all facets which possibly cover given point, all facets which are pointed by cells in column which contains given point are returned.
*/
class BBoxBasedAccelerator : public SpatialAccelerator
{
public:
/**
\param[in] mesh Mesh for which acceleration structure should be built.
\param[in] resolution Resolution on 3d grid.
*/
BBoxBasedAccelerator(const Mesh* mesh, int32_t resolution);
virtual ~BBoxBasedAccelerator();
int32_t getNextFacet();
void setState(const Vertex* pos, const Edge* ed, const Facet& fc);
void setState(const physx::PxVec3& p);
private:
bool testCellPolygonIntersection(int32_t cellId, physx::PxBounds3& facetBB);
void buildAccelStructure(const Vertex* pos, const Edge* edges, const Facet* fc, int32_t facetCount);
int32_t mResolution;
physx::PxBounds3 mBounds;
physx::PxBounds3 facetBox;
std::vector< std::vector<int32_t> > mSpatialMap;
std::vector<physx::PxBounds3> mCells;
// Iterator data
std::vector<uint32_t> alreadyGotFlag;
uint32_t alreadyGotValue;
std::vector<int32_t> cellList;
int32_t mIteratorCell;
int32_t mIteratorFacet;
};
/**
Accelerator which builds map from 3d grid to initial mesh facets.
To find all facets which possibly intersect given one, it return all facets which are pointed by grid cells, which are intersected by given facet.
To find all facets which possibly cover given point, all facets which are pointed by cells in column which contains given point are returned.
In difference with BBoxBasedAccelerator this accelerator computes actual intersection of cube with polygon. It is more precise and omits much more intersections but slower.
*/
class IntersectionTestingAccelerator : public SpatialAccelerator
{
public:
IntersectionTestingAccelerator(const Mesh* mesh, int32_t resolution);
int32_t getNextFacet();
void setState(const Vertex* pos, const Edge* ed, const Facet& fc);
void setState(const physx::PxVec3& p);
private:
std::vector< std::vector<int32_t> > mSpatialMap;
std::vector<physx::PxBounds3> mCubes;
int32_t mResolution;
// Iterator data
std::vector<uint32_t> alreadyGotFlag;
uint32_t alreadyGotValue;
std::vector<int32_t> cellList;
int32_t mIteratorCell;
int32_t mIteratorFacet;
};
} // namespace Blast
} // namsepace Nv
#endif // ifndef NVBLASTEXTAUTHORINGACCELERATOR_H
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