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73 lines
2.3 KiB
73 lines
2.3 KiB
//========= Copyright Valve Corporation, All rights reserved. ============// |
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// |
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// Purpose: |
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// |
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// $NoKeywords: $ |
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// |
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//=============================================================================// |
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#ifndef POLYHEDRON_H_ |
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#define POLYHEDRON_H_ |
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#ifdef _WIN32 |
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#pragma once |
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#endif |
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#include "mathlib/mathlib.h" |
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struct Polyhedron_IndexedLine_t |
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{ |
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unsigned short iPointIndices[2]; |
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}; |
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struct Polyhedron_IndexedLineReference_t |
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{ |
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unsigned short iLineIndex; |
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unsigned char iEndPointIndex; //since two polygons reference any one line, one needs to traverse the line backwards, this flags that behavior |
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}; |
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struct Polyhedron_IndexedPolygon_t |
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{ |
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unsigned short iFirstIndex; |
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unsigned short iIndexCount; |
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Vector polyNormal; |
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}; |
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class CPolyhedron //made into a class because it's going virtual to support distinctions between temp and permanent versions |
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{ |
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public: |
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Vector *pVertices; |
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Polyhedron_IndexedLine_t *pLines; |
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Polyhedron_IndexedLineReference_t *pIndices; |
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Polyhedron_IndexedPolygon_t *pPolygons; |
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unsigned short iVertexCount; |
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unsigned short iLineCount; |
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unsigned short iIndexCount; |
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unsigned short iPolygonCount; |
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virtual ~CPolyhedron( void ) {}; |
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virtual void Release( void ) = 0; |
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Vector Center( void ); |
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}; |
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class CPolyhedron_AllocByNew : public CPolyhedron |
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{ |
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public: |
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virtual void Release( void ); |
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static CPolyhedron_AllocByNew *Allocate( unsigned short iVertices, unsigned short iLines, unsigned short iIndices, unsigned short iPolygons ); //creates the polyhedron along with enough memory to hold all it's data in a single allocation |
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private: |
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CPolyhedron_AllocByNew( void ) { }; //CPolyhedron_AllocByNew::Allocate() is the only way to create one of these. |
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}; |
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CPolyhedron *GeneratePolyhedronFromPlanes( const float *pOutwardFacingPlanes, int iPlaneCount, float fOnPlaneEpsilon, bool bUseTemporaryMemory = false ); //be sure to polyhedron->Release() |
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CPolyhedron *ClipPolyhedron( const CPolyhedron *pExistingPolyhedron, const float *pOutwardFacingPlanes, int iPlaneCount, float fOnPlaneEpsilon, bool bUseTemporaryMemory = false ); //this does NOT modify/delete the existing polyhedron |
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CPolyhedron *GetTempPolyhedron( unsigned short iVertices, unsigned short iLines, unsigned short iIndices, unsigned short iPolygons ); //grab the temporary polyhedron. Avoids new/delete for quick work. Can only be in use by one chunk of code at a time |
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#endif //#ifndef POLYHEDRON_H_ |
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