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 <osgEarth/GeoData>
#include <osgTerrain/Terrain>

#include <tbb/concurrent_queue.h>

namespace osgEarth
{
   class TerrainTileModel;
};

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();

   virtual const osgEarth::TerrainOptions& osgEarthTerrainOptions() const;

   virtual void findMissingTiles(const DtTerrainPagingGeometryPtr& geometry, DtTileKeyList& tiles) const;

protected:  
   virtual bool pageInTile(const osgEarth::TileKey& tileKey, 
                           DtTerrainIntersectIDType intersectId = 0);

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

   virtual boost::shared_ptr<DtTileData> createTileDataFromTileModel(
      const osgEarth::TileKey& tilekey,
      DtTerrainIntersectIDType intersectId) const;

   virtual boost::shared_ptr<DtTileData> createTileDataFromHeightfield(
      const osgEarth::TileKey& tilekey,
      DtTerrainIntersectIDType intersectId,
      const osg::ref_ptr<const osg::HeightField>& heightfield) const;

   virtual boost::shared_ptr<DtTileData> createTileDataFromGeometry(
      const osgEarth::TileKey& tilekey,
      DtTerrainIntersectIDType intersectId,
      const osg::ref_ptr<osg::Node>& geometry) const;

   virtual void addTile(const osgEarth::TileKey& tilekey, const boost::shared_ptr<DtTileData>& tile);

   virtual void addEmptyTile(
      const osgEarth::TileKey& tilekey,
      DtTerrainIntersectIDType intersectId = 0);

   DtOsgEarthTerrainSourceTracker* myOsgTracker;

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

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

   typedef std::map<osgEarth::TileKey, boost::shared_ptr<DtTileData> > DtTerrainTileMap;

   DtTerrainTileMap myPagedInTilesMap;

   typedef std::map<std::pair<osgEarth::TileKey, osgEarth::TileKey>, osg::ref_ptr<osg::Node> > MaskGeometryCache;
   MaskGeometryCache myMaskGeometryCache;
};