source-engine/game/shared/portal/StaticCollisionPolyhedronCache.h

//========= Copyright Valve Corporation, All rights reserved. ============//
//
// Purpose: Portals use polyhedrons to clip and carve their custom collision areas.
//			This file should provide caches of polyhedrons with the initial conversion 
//			processes already completed.
//
// $NoKeywords: $
//=====================================================================================//


#include "igamesystem.h"
#include "mathlib/polyhedron.h"
#include "tier1/utlvector.h"
#include "tier1/utlstring.h"
#include "tier1/utlmap.h"



class CStaticCollisionPolyhedronCache : public CAutoGameSystem
{
public:
	CStaticCollisionPolyhedronCache( void );
	~CStaticCollisionPolyhedronCache( void );

	void LevelInitPreEntity( void );
	void Shutdown( void );

	const CPolyhedron *GetBrushPolyhedron( int iBrushNumber );
	int GetStaticPropPolyhedrons( ICollideable *pStaticProp, CPolyhedron **pOutputPolyhedronArray, int iOutputArraySize );

private:
	// See comments in LevelInitPreEntity for why these members are commented out
//	CUtlString	m_CachedMap;

	CUtlVector<CPolyhedron *> m_BrushPolyhedrons;

	struct StaticPropPolyhedronCacheInfo_t
	{
		int iStartIndex;
		int iNumPolyhedrons;
		int iStaticPropIndex; //helps us remap ICollideable pointers when the map is restarted
	};

	CUtlVector<CPolyhedron *> m_StaticPropPolyhedrons;
	CUtlMap<ICollideable *, StaticPropPolyhedronCacheInfo_t> m_CollideableIndicesMap;


	void Clear( void );
	void Update( void );
};

extern CStaticCollisionPolyhedronCache g_StaticCollisionPolyhedronCache;