terraPageTerrainSourcePager.h

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/*******************************************************************************
** Copyright (c) 2013 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/


#pragma once

#include "vantageTerrainImplementation/vantageTerrainImplementationDefines.h"
#include "vantageTerrainImplementation/boundingVolumeTerrainSourcePager.h"
#include "vantageTerrainImplementation/pageInVisitor.h"
#include "vantageTerrainImplementation/boundingVolumeTerrainSourceTracker.h"

struct DT_DLL_vantageTerrainImplementation DtTerraPageBoundingInfo
{
   DtNodeBoundingInfoPtr boundingInfo;
   bool boundingInfoFromGeometry; 
};

class DtVantageTerrainEngine;

namespace txp
{
   class TXPNode;
}

typedef boost::unordered_map<osg::Node*, DtTerraPageBoundingInfo> DtTerraPageNodeBoundingVolumeMap;

class DT_DLL_vantageTerrainImplementation DtTerraPageTerrainSourcePager : public DtBoundingVolumeTerrainSourcePager
{
public:

   DtTerraPageTerrainSourcePager(DtVantageTerrainEngine* terrainEngine, 
      txp::TXPNode* rootNode, const DtFilename& surfaceCharacterMap);

   virtual ~DtTerraPageTerrainSourcePager();

   virtual DtTerrainSourceTracker* createTerrainSourceTracker(DtVantageTerrainEngine* e);

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

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

   virtual void updatePageTracker(DtTerrainIntersectIDType intersectId = 0);

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


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

   virtual void traverseChildAndLoad(osg::Group*);

protected:
   txp::TXPNode* myRootNode;

   DtTerraPageNodeBoundingVolumeMap myPagedInNodes;
   DtTerraPageNodeBoundingVolumeMap myPagedOutNodes;

   DtFilename mySurfaceCharacterMap;
};