osgEarthTerrainSourcePager.h

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

#pragma once



#include <vantageTerrainImplementation/vantageTerrainImplementationDefines.h>
#include <vantageTerrainImplementation/osgEarthTerrainSourceTracker.h>
#include <vantageTerrainImplementation/pageInVisitor.h>

#include <osgEarth/MapNode>

#include <tbb/concurrent_queue.h>

#include <osgTerrain/Terrain>

typedef std::map<osgEarth::TileKey, osg::ref_ptr<osg::Node> > DtTerrainTileMap;

class DT_DLL_vantageTerrainImplementation DtOsgEarthTerrainSourcePager : 
   public DtTerrainSourcePager
{
public:

   DtOsgEarthTerrainSourcePager(DtVantageTerrainEngine* terrainEngine, osgEarth::MapNode* mapNode);

   virtual ~DtOsgEarthTerrainSourcePager();

   virtual DtTerrainSourceTracker* createTerrainSourceTracker(DtVantageTerrainEngine*);

   virtual bool pageInTiles(DtTileKeyList& tileIds, 
                            DtTerrainIntersectIDType intersectId = 0);

   virtual bool pageOutTiles(const DtTileKeyList& tilesToRemove);

   virtual void updatePageTracker(DtTerrainIntersectIDType intersectId = 0);

   virtual const unsigned int determineTrackerLod();

protected:

   virtual bool addCollisionObject(osg::ref_ptr<osg::Node> node,
      unsigned int& numTrianglesOut);
  
   virtual bool pageInTile(const osgEarth::TileKey& tileKey, 
                           DtTerrainIntersectIDType intersectId = 0);

   virtual bool pageOutTile(const osgEarth::TileKey& tileKey);

   virtual DtTileData* createTileData(const osgEarth::TileKey& tileKey, 
      const unsigned int& numTriangles, 
      DtTerrainIntersectIDType intersectId = 0) const;

protected:

   virtual void createEmptyTile(const osgEarth::TileKey& tileKey,
      DtTerrainIntersectIDType intersectId = 0);

   osg::ref_ptr<osgEarth::MapNode> myMapNode;


   osg::ref_ptr<osgTerrain::Terrain> myOsgTerrain;

   DtTerrainTileMap myPagedInTilesMap;

};