DtFastGroup.h

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/******************************************************************************
** Copyright (c) 2022 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <osg/Group>
#include <osg/MatrixTransform>

namespace makVrv
{   
   class DtSceneObject;

   class DT_DLL_VRVOSG DtFastGroup : public osg::Group
   {
   public:

      META_Node(vrvOsg, DtFastGroup);

      DtFastGroup();

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

      virtual bool removeChildren( unsigned int pos,unsigned int numChildrenToRemove);

      virtual void resizeGLObjectBuffers(unsigned int maxSize);
   protected:
      // This tracks osg::DisplaySettings::instance()->getMaxNumberOfGraphicsContexts()
      // (or rather the last value of maxSize that the resizeGLObjectBuffers was called with)
      // This is checked so that resizeGLObjectBuffers does not trigger
      // a resize of the whole scene graph when a new window is made.
      // (we use a contexts that share data, so this number never changes)
      // This fixes the slowdown when new windows are added
      int myLastMaxNumberOfGraphicsContexts = -1;
   };

   class DT_DLL_VRVOSG DtFastMatrixTransform : public osg::MatrixTransform
   {
   public:

      META_Node(vrvOsg, DtFastMatrixTransform);

      DtFastMatrixTransform();

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

      virtual bool removeChildren( unsigned int pos,unsigned int numChildrenToRemove);
      
      virtual void setSceneObject( DtSceneObject* sceneObject );
      virtual DtSceneObject* sceneObject() const;
      
      virtual osg::Matrix& getMatrixForEditing();
      virtual void invalidateMatrix();
   
   protected:
      DtSceneObject* mySceneObject;
   };
}