DtInstanceNode.h

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/******************************************************************************
** Copyright (c) 2018 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <vrvUtil/DtVirtualBaseClass.h>

#include <osg/Transform>
#include <osg/View>
#include <osg/CopyOp>

namespace osgUtil
{
   class NodeVisitor;
}

namespace makVrv
{
   class DtInstanceManager;

   class DT_DLL_VRVOSG DtInstanceNode : public osg::Transform
   {
   protected:
      DtInstanceNode(DtInstanceManager& instanceManager);

      friend class DtInstanceNodeCreator;
   public:
      virtual ~DtInstanceNode();

   private:

      DtInstanceNode();
      DtInstanceNode &operator=(const DtInstanceNode &other);

   public:
      DtInstanceNode(const DtInstanceNode& ob, const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY);

      virtual osg::Object* clone(const osg::CopyOp& copyop = osg::CopyOp::SHALLOW_COPY) const;

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

      virtual bool computeWorldToLocalMatrix(osg::Matrix& matrix, osg::NodeVisitor* nv) const;

      virtual bool computeLocalToWorldMatrix(osg::Matrix& matrix, osg::NodeVisitor* nv) const;

      virtual DtInstanceManager& instanceManager() { return myInstanceManager; }

   protected:
      osg::Vec3d myLastEye;
      DtInstanceManager& myInstanceManager;
   };

   class DT_DLL_VRVOSG DtInstanceNodeCreator : public DtVirtualBaseClass
   {
   public:
      // CTOR
      DtInstanceNodeCreator(DtDe& de);

      virtual ~DtInstanceNodeCreator();

   private:
      DtInstanceNodeCreator(const DtInstanceNodeCreator &other);
      DtInstanceNodeCreator &operator=(const DtInstanceNodeCreator &other);

   public:
      static DtInstanceNodeCreator& instance(DtDe& de);

      static void registerInstance(DtDe& de,
         DtInstanceNodeCreator* instance);

      virtual DtInstanceNode* create(DtInstanceManager& instanceManager);
   protected:
      DtDe& myDe;
   };

}