include/vrvCore/DtAttachableIntervisibilityUpdater.h

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


#pragma once

#include <vrvCore/DtLineModelUpdater.h>

#include <vrvCore/DtIntersector.h>

namespace makVrv 
{
   class DT_DLL_VRVCORE DtAttachableIntervisibilityUpdater : public DtLineModelUpdater
   {
   public:

      DtAttachableIntervisibilityUpdater( DtDe& de, DtElementID id, bool doNotAddToMgr = false );

      virtual ~DtAttachableIntervisibilityUpdater();

      virtual void setFixedDistance( bool );

   protected:

      virtual void update( double );

      virtual bool doIntersection();

      // Updates the sceneObject with intervisibility information
      virtual void updateSceneObject();

      virtual double calculateDistance( const DtVector& start,
         const DtVector& end, DtVector* circleOrigin = 0 ) const;

      virtual void calculateFixedDistance();

      virtual DtVector fixedDistanceFrom( const DtVector& start, const DtVector& end,
         double heading, double distance ) const;

      virtual double calculateHeading( const DtVector& start,
         const DtVector& end ) const;

   protected:

      struct IntersectionInformation
      {
         bool intersection;
         DtVector startPoint;
         DtVector endPoint;
         DtIntersectorResult result;
      };

      IntersectionInformation myIntersectionInformation;

      bool myFixDistance;
      double myFixedDistance;
      double myFixedHeading;
   };
}