include/vantageTerrainImplementation/pagedLodTerrainSourcePager.h

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

#pragma once



#include <vantageTerrainImplementation/terrainEngineCommand.h>
#include <vantageTerrainImplementation/boundingVolumeTerrainSourcePager.h>
#include <vantageTerrainImplementation/pageInVisitor.h>
#include <vantageTerrainImplementation/pagedLodTerrainSourceTracker.h>
#include <terrainInterface/terrainPagingGeometry.h>

class DT_DLL_vantageTerrainImplementation DtPagedLodTerrainSourcePager : public DtBoundingVolumeTerrainSourcePager
{
public:

   DtPagedLodTerrainSourcePager(DtVantageTerrainEngine* terrainEngine, osg::Group* rootNode);

   virtual ~DtPagedLodTerrainSourcePager();

   virtual DtTerrainSourceTracker* createTerrainSourceTracker();

   virtual bool pageInGeometry(const DtTerrainPagingGeometryPtr geometry,
      const unsigned int intersectId = 0);

   virtual bool pageOutNodes(std::list<DtNodeId>& nodesToRemove);

   virtual void updateTerrain(const unsigned int intersectId = 0);

   virtual void updatePageTracker(const unsigned int intersectId = 0);

   static DtTerrainSourcePager* terrainChooserFunction(osg::Node& node,
      DtVantageTerrainEngine* terrainEngine);

protected:
   osg::Node* terrainRoot();

   virtual bool pageInData(DtPageInVisitor& visitor);


   static DtNodeId osgNodeId(osg::Node* node);
   static osg::Node* nodeFromId(DtNodeId nodeId);

protected:

   osg::Node* myRootNode;

   bool myForceUpdate;

   class DtActivePageVisitor : public DtBoundingVolumeActivePageVisitor
   {
   public:
      DtActivePageVisitor(unsigned int intersectId = 0);
      virtual void apply(osg::Group& node);
      virtual void apply(osg::LOD& node);
      virtual void apply(osg::PagedLOD& node);
   };

};