terrainSourceTracker.h

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/*******************************************************************************
** Copyright (c) 2010 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/


#pragma once

#include <vantageTerrainImplementation/terrainSourcePager.h>
#include <vantageTerrainImplementation/vantageTerrainImplementationDefines.h>
#include <vantageTerrainImplementation/osgToBullet.h>

#include <terrainInterface/terrainPagingGeometry.h>

#include <tbb/spin_rw_mutex.h>
#include <boost/unordered_map.hpp>

class btIDebugDraw;


typedef boost::unordered_multimap<DtNodeId, btCollisionObject*> DtNodeToCollObjMMap;
typedef std::pair<DtNodeToCollObjMMap::iterator, DtNodeToCollObjMMap::iterator> 
DtNodeToCollObjRangePair;

class DT_DLL_vantageTerrainImplementation DtTerrainSourceTracker
{
public:

   DtTerrainSourceTracker(DtPagerCommandQueue* commandQueue);

   virtual ~DtTerrainSourceTracker();

   virtual bool dataAvailable(DtPagingMetaDataPtr metaData, 
      DtTerrainPagingGeometryPtr geometry) = 0;

   virtual void pageInData(DtPagingMetaDataPtr metaData, 
      DtTerrainPagingGeometryPtr geometry) = 0;

   virtual void drawDebugInfo(btIDebugDraw* debugDrawer) = 0;   

   //Should return true if the tracker is capable of paging out data.
   virtual bool canPageOutData(unsigned int intersectId) = 0;

   virtual unsigned int findOldestPagedData(unsigned int& numTriangles) = 0;

   virtual void pageOutOldestData(const int priority) = 0;

   virtual void addNodeToCollisionMapping(DtNodeId node, 
      btCollisionObject* collisionObject);

   virtual void addNodesToCollisionMapping(DtNodeId node, 
      DtCollisionObjectList* collObjList);

   virtual void removeNodeToCollisionMappings(DtNodeId node);

   virtual std::list<btCollisionObject*> collisionObjectsForNode(
      DtNodeId node);

protected:

   DtPagerCommandQueue* myCommandQueue;

   DtNodeToCollObjMMap myNodeToCollObjMMap;

   mutable tbb::spin_rw_mutex myMutex;
};