Dt3DGreatCircleArcModelInstanceSegment.h

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


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/Dt3DLineModelInstanceSegmentInterface.h>

#include <osg/Geode>

class DtVector;

namespace makVrv
{
   class DtGreatCircleCurveGenerator;

   class DT_DLL_VRVOSG Dt3DGreatCircleArcModelInstanceSegment 
      : public Dt3DLineModelInstanceSegmentInterface
   {
   public:
      Dt3DGreatCircleArcModelInstanceSegment( DtDe& de );

      ~Dt3DGreatCircleArcModelInstanceSegment();

      virtual void setStartPercentage( double startPct );

      virtual double startPercentage() const;

      virtual void setEndPercentage( double endPct );

      virtual double endPercentage() const;

      virtual void setMaxSubdivisions( int subdivisions );

      virtual void setPreferredSubdivisionSize( double size );

      virtual void setHeightScale( double heightScale );

      virtual void setStartPoint(const osg::Vec3d& startPoint);

      virtual void setEndPoint(const osg::Vec3d& endPoint);

      const osg::Vec3d& startPoint() const;

      const osg::Vec3d& endPoint() const;

      virtual void setColor(const osg::Vec4& color);

      virtual void setVertexColor( unsigned int vertexIndex, const osg::Vec4& color );

      virtual void setWidth(double lineWidth);

      virtual double width() const;

      virtual void setStipplePattern(unsigned int stipplePattern, int repeatFactor);

      virtual osg::Node* rootNode();

      const std::vector<osg::Vec3>& pickableVertices() const;

      virtual void update();

      virtual void setOrigin( const osg::Vec3d origin );

   private:

      Dt3DGreatCircleArcModelInstanceSegment();

      Dt3DGreatCircleArcModelInstanceSegment( const Dt3DGreatCircleArcModelInstanceSegment& );

      Dt3DGreatCircleArcModelInstanceSegment& operator=( const Dt3DGreatCircleArcModelInstanceSegment& );

   protected:

      virtual void buildVertices();

      virtual void buildLinePrimitive( int numVertices );

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

      virtual void build();

      virtual void buildColorArray();

      DtVector localToGeodetic( const osg::Vec3d& local );

      osg::Vec3d geodeticToLocal( const DtVector& geodetic );

   protected:
      DtDe& myDe;
      double myStartPercentage;
      double myEndPercentage;
      osg::Vec3d myOrigin;
      double myHeightScale;
      int myMaxSubdivisions;
      double myPreferredSubdivisionSize;
      bool myGeometryDirty;

      struct LineSegmentState
      {
         osg::Vec3d startPoint;
         osg::Vec3d endPoint;
         osg::Vec4 color[2];
         double width;
         unsigned int stipplePattern;
      };

      LineSegmentState myState;

      osg::ref_ptr<osg::Geode> myGeode;
      osg::ref_ptr<osg::Geometry> myGeometry;
      osg::ref_ptr<osg::Vec3Array> myVertices;
   };
}