include/vantageTerrainImplementation/boundingVolumeTerrainSourcePager.h

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/*******************************************************************************
** Copyright (c) 2011 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/


#pragma once

#include <vantageTerrainImplementation/terrainEngineCommand.h>
#include <vantageTerrainImplementation/terrainSourcePager.h>
#include <vantageTerrainImplementation/pageInVisitor.h>
#include <vantageTerrainImplementation/boundingVolumeTerrainSourceTracker.h>
#include <terrainInterface/terrainPagingGeometry.h>

class DT_DLL_vantageTerrainImplementation DtBoundingVolumeTerrainSourcePager : public DtTerrainSourcePager
{
public:

   DtBoundingVolumeTerrainSourcePager(DtVantageTerrainEngine* terrainEngine);

   virtual ~DtBoundingVolumeTerrainSourcePager();

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

   virtual bool pageOutNodes(std::list<DtNodeId>& nodesToRemove) = 0;

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

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

protected:
   class DtBoundingVolumeActivePageVisitor : public DtMaintainMatrixVisitor
   {
   public:
      DtBoundingVolumeActivePageVisitor(unsigned int intersectId = 0);

      const DtNodeBoundingInfoList& pagedOutBoundingVolumes() const;
      const DtNodeBoundingInfoMap& pagedInBoundingVolumes() const;
      bool noValidAreas() const;

   protected:
      void pushBound(osg::Node& node);
      void popBound();

      bool addToPagedOutVolumesList(const DtNodeBoundingInfoPtr pagedOutArea);

   protected:
      DtNodeBoundingInfoList myPagedOutBoundingList;
      DtNodeBoundingInfoMap myPagedInBoundingMap;
      bool myNoValidAreas;
      std::stack<osg::BoundingSphere> myBoundingNodeStack;
      unsigned int myIntersectId;
   };

};