metaflightTerrainSourcePager.h

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


#pragma once

#include "vantageTerrainImplementation/vantageTerrainImplementationDefines.h"
#include "vrvOsg/DtHierarchicalPagedLod.h"
#include "vantageTerrainImplementation/boundingVolumeTerrainSourcePager.h"
#include "vantageTerrainImplementation/pageInVisitor.h"
#include "vantageTerrainImplementation/boundingVolumeTerrainSourceTracker.h"
#include "vantageTerrainImplementation/surfaceCharacteristicsMap.h"

class DtVantageTerrainEngine;

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

typedef boost::unordered_map<makVrv::DtHierarchicalPagedLod*, DtMetaflightBoundingInfo> DtHierNodeBoundingVolumeMap;

class DT_DLL_vantageTerrainImplementation DtMetaflightTerrainSourcePager : public DtBoundingVolumeTerrainSourcePager
{
public:

   DtMetaflightTerrainSourcePager(DtVantageTerrainEngine* terrainEngine, 
      osg::Group* rootNode, makVrf::DtSurfaceCharacteristicMapConstPtr surfaceCharacterMap);

   virtual ~DtMetaflightTerrainSourcePager();

   virtual DtTerrainSourceTracker* createTerrainSourceTracker(DtVantageTerrainEngine*);

   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, makVrf::DtSurfaceCharacteristicMapConstPtr surfaceCharacterMap);

protected:

   class DtMetaflightTerrainVisitor : public DtBoundingVolumeActivePageVisitor
   {
   public:
      DtMetaflightTerrainVisitor();
      virtual ~DtMetaflightTerrainVisitor();

      virtual void apply(osg::Group& node);

   protected:
      virtual void indent();

   public:
      int myIndentLevel;
   };

protected:
   osg::Group* myRootNode;


   DtHierNodeBoundingVolumeMap myPagedInNodes;
   DtHierNodeBoundingVolumeMap myPagedOutNodes;
   makVrf::DtSurfaceCharacteristicMapConstPtr mySurfaceCharacterMap;
};