DtOsgTrackHistoryRibbon.h

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


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/DtOsgRibbon.h>
#include <vrvOsg/DtSharedDrawElementsUInt.h>

#include <osg/Geometry>

namespace osg
{
   class DrawElementsUInt;
}

namespace makVrv
{

   class DtSceneObject;

   class DT_DLL_VRVOSG DtOsgTrackHistoryRibbon : public DtOsgRibbon
   {
   public:

      DtOsgTrackHistoryRibbon( DtDe& de, float segmentSpacing,
         const osg::Vec4& color, float maxLength );

      virtual ~DtOsgTrackHistoryRibbon();

      virtual void traverse( osg::NodeVisitor& nv );

      virtual void setMaxSegments( long segments );

   protected:

      virtual void addParticle( osg::Vec3d const& left,
         osg::Vec3d const& right, double simTime );

      virtual float currentSegmentLength();

      virtual void extendCurrentSegment( osg::Vec3d const& left,
         osg::Vec3d const& right, double simTime );

      virtual osg::Drawable* getDrawable();

      virtual int particleIndexAtOffset( int offset );

      virtual void update();

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

      virtual void updateBounds(const osg::Vec3& point);

   protected:
      class TrackHistoryGeometry : public osg::Geometry
      {
         class ComputeBoundsCallback
            : public osg::Drawable::ComputeBoundingBoxCallback
         {
         public:
            ComputeBoundsCallback();

            ComputeBoundsCallback(
               const osg::Drawable::ComputeBoundingBoxCallback& cb,
               const osg::CopyOp& copyop);

            virtual ~ComputeBoundsCallback();

            virtual osg::BoundingBox computeBound(const osg::Drawable& g) const;

            void dirtyBound();

         private:
            mutable bool myDirtyBound;
         };

         friend class ComputeBoundsCallback;

      public:
         TrackHistoryGeometry();

         TrackHistoryGeometry(const TrackHistoryGeometry& geometry,
            const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);

         virtual ~TrackHistoryGeometry();

         virtual void expandBoundBy(const osg::Vec3d& point);
      };

   protected:

      DtDe& myDe;

      osg::ref_ptr<osg::Vec3Array> myPoints;

      osg::ref_ptr<DtSharedDrawElementsUInt> myRibbon;
      osg::ref_ptr<DtSharedDrawElementsUInt> myBottomLine;
      osg::ref_ptr<DtSharedDrawElementsUInt> myTopLine;

      osg::ref_ptr<TrackHistoryGeometry> myGeometry;

      int myParticleIndex;
   };

}