threeDTileTerrainSourcePager.h

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/*******************************************************************************
** Copyright (c) 2020 MAK Technologies, Inc.
** All rights reserved.
*******************************************************************************/

#pragma once



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

#include <set>

namespace osgEarth
{
   namespace Contrib
   {
      namespace ThreeDTiles
      {
         class ThreeDTileNode;
         class ThreeDTilesetNode;
         class ThreeDTilesetContentNode;
         class Tile;
      }
   }
}
namespace osgDb
{
   class Options;
}

class DT_DLL_vantageTerrainImplementation DtThreeDTileTerrainSourcePager
   : public DtBoundingVolumeTerrainSourcePager
{
public:
   typedef std::map<std::string, DtPageInVisitor::NodePagingRecord> NodePagingRecordMap;

   DtThreeDTileTerrainSourcePager(DtVantageTerrainEngine* terrainEngine, osg::Group* rootNode, const DtFilename& surfaceCharacterMap);

   virtual ~DtThreeDTileTerrainSourcePager();

   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);

   virtual const NodePagingRecordMap& pagedInNodes() const;

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

protected:
   osg::Node* terrainRoot();

protected:
   class DtActivePageVisitor : public DtBoundingVolumeActivePageVisitor
   {
   public:
      using DtBoundingVolumeActivePageVisitor::apply;

      explicit DtActivePageVisitor(const NodePagingRecordMap&, float geometricError, DtTerrainIntersectIDType intersectId = 0);

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

   protected:
      virtual void findPageInPageOutBounds(const osgEarth::Contrib::ThreeDTiles::Tile* tile, const osgDB::Options* options);
      virtual void findPageInPageOutSub(const osgEarth::Contrib::ThreeDTiles::Tile* tile);
   private:
      const NodePagingRecordMap& myPagedInNodes;
      float myGeometricError;
   };

   osg::ref_ptr<osg::Node> myRootNode;
   osg::Matrix myMatrix;

   NodePagingRecordMap myPagedInNodes;

   DtFilename mySurfaceCharacterMap;

   float myGeometricError;

};