DtOverlayGreatCircleArcModelInstance.h

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/******************************************************************************
** Copyright (c) 2012 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/DtOverlaySegmentedLineModelInstance.h>


namespace makVrv
{
   class DtSegmentedLine;
   class DtGreatCircleCurveGenerator;

   class DT_DLL_VRVOSG DtOverlayGreatCircleArcModelInstance
      : public DtOverlaySegmentedLineModelInstance
   {
   public:

      DtOverlayGreatCircleArcModelInstance(DtDe& de);

      virtual ~DtOverlayGreatCircleArcModelInstance();

      virtual void setMaxSubdivisions( int subDivisions );

      virtual void setPreferredSubdivisionSize( double size );

      virtual void setHeightScale( double heightScale );

      virtual bool realize(DtModelDefinition& definition);

   protected:

      virtual void updateGeometry();

      virtual void generateStyleSegmentedGeometry();

      virtual void generateMultipointGeometry();

      virtual void updateSegments();

      virtual void resizeSegmentAttributes( int size );

      virtual int calculateNumSubdivisions( 
         const DtGreatCircleCurveGenerator& curveGen,
         const DtVector& endGeod, double percentage ) const;

      DtVector localToGeodetic( const DtVector& local );

      DtVector geodeticToLocal( const DtVector& geodetic );

   protected:

      struct SegmentLandmarks
      {
         int segmentStartVertex;
         int segmentEndVertex;
      };

      typedef std::vector<SegmentLandmarks> SegmentLandmarksVector;

      SegmentLandmarksVector mySegmentLandmarks;
      double myHeightScale;
      int myMaxSubdivisions;
      double myPreferredSubdivisionSize;
   };
}