DtUpdater.h

Go to the documentation of this file.

/****************************************************************************** 
** Copyright (c) 2009 MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 
/****************************************************************************** 
** $RCSfile: DtUpdater.h,v $ $Revision: 1.19 $ $State: Exp $ 
******************************************************************************/ 
 
 
#pragma once 
#include <vrvCore/vrvCore.h>
#include <vrvCore/DtUniqueID.h>
#include <vrvCore/DtSceneObject.h>

#include <boost/signals.hpp>

namespace makVrv 
{ 
   class DtDe;
   class DtDeSharedState;
   
   class DT_DLL_VRVCORE DtUpdater
   { 
   public:
      friend class DtUpdaterManager;

      DtUpdater( DtDe& de, DtUniqueID id, bool doNotAddToMgr = false );

      virtual ~DtUpdater();

      inline void updateIfNecessary(double simTime)
      {
         if(lastUpdateTime() < simTime )
         {
            update( simTime );
         }
      }
      
      virtual void update( double simTime ) = 0;

      virtual void setSceneObject( DtSceneObject* sceneObject);     

      DtSceneObject* findSceneObject();
    
      inline double lastUpdateTime() const
      {
         return myLastUpdateTime;
      }
  
      inline DtUniqueID uniqueId() const
      {
         return myUniqueId;
      }
      
      virtual void setUpdaterPosition( int vtx, const DtVector& position );
      
      virtual const DtVector& updaterPosition( int vtx  ) const;
   
      virtual void setUpdaterOrientation( int vtx, const DtTaitBryan& orientation );  
      
      virtual const DtTaitBryan& updaterOrientation( int vtx ) const;
      
      void updateSceneObject();

      bool inManager() const;

      // Checks terrain scaling flag, then scales myTransforms if scaling is on
      virtual void terrainScaleTransformsIfNeeded();

      boost::signal< void (const DtUniqueID&) > signal_updaterToBeDeleted;
      
   protected:

      DtDe& myDe;
      DtUniqueID myUniqueId;
      
      // pointer to the scene object being updated
      DtSceneObject* mySceneObject;
      double myLastUpdateTime;
      
      // local copy of the vertex positions and orientations.  These are typically
      // calculated in one step, and then pushed to the scene object in a second,
      // making the concatenation of updaters simpler.
      DtSceneObject::TransformList myTransforms;
      bool myInManager;

      // This is kept to make terrain scale updating cheaper (by one virtual
      // function call)
      const DtDeSharedState& myDeSharedState;
   }; 
}