DtIndirectGeoComputeBoundCallback.h

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/******************************************************************************
** Copyright (c) 2017 VT-MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <osg/Drawable>
#include <osg/ComputeBoundsVisitor>

#include <vrvUtil/DtVirtualBaseClass.h>

#include <vrvCore/DtDe.h>

namespace makVrv
{
   template<class BoundingBoxProvider>
   class DtIndirectGeoComputeBoundCallback : public osg::Drawable::ComputeBoundingBoxCallback
   {
   public:
      DtIndirectGeoComputeBoundCallback(BoundingBoxProvider* provider) : myProvider(provider) {}

      DtIndirectGeoComputeBoundCallback(const DtIndirectGeoComputeBoundCallback& rhs, const osg::CopyOp& copyop) :
         osg::Drawable::ComputeBoundingBoxCallback(rhs, copyop),
         myProvider(rhs.myProvider) {}

      virtual void reset() { }
      virtual osg::BoundingBox computeBound(const osg::Drawable& drawable) const
      {
         return myProvider->boundingBox();
      }
   protected:
      const BoundingBoxProvider* myProvider;
   private:
      DtIndirectGeoComputeBoundCallback(){}
   };

   template<class BoundingBoxProvider>
   class DtIndirectGeoComputeBoundCallbackCreator : public DtVirtualBaseClass
   {
   public:
      DtIndirectGeoComputeBoundCallbackCreator(DtDe &de);

      virtual ~DtIndirectGeoComputeBoundCallbackCreator();

      virtual osg::Drawable::ComputeBoundingBoxCallback* create(BoundingBoxProvider* provider) const;

      static DtIndirectGeoComputeBoundCallbackCreator& instance(DtDe& de);

      static const std::string& theClassName();
   protected:
      DtDe& myDe;
   };
}

#include "DtIndirectGeoComputeBoundCallback.inl"