DtSplitBackfacePolyVisitor.h

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/******************************************************************************
** Copyright (c) 2013 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>

#include <osg/CullFace>
#include <osg/Group>
#include <osg/NodeVisitor>
#include <osg/Referenced>


namespace osg
{
   class Geode;
   class Node;
   class StateSet;
};


namespace makVrv
{

   class DT_DLL_VRVOSG DtSplitBackfacePolyVisitor : public osg::NodeVisitor
   {
   public:
      DtSplitBackfacePolyVisitor(bool transparentOnly = false);

      virtual ~DtSplitBackfacePolyVisitor();

      virtual void apply(osg::Node& node);

      virtual void apply(osg::Geode& geode);

      void processGeometry();

      void setTransparentOnly(bool enable);

      bool transparentOnly() const;

   protected:
      void splitGeometry(osg::Geode& geode) const;

      bool isDoubleSided(const osg::Node& node) const;

      bool isTransparentMaterial(const osg::StateSet& ss) const;

      bool isTransparentTextures(const osg::StateSet& ss) const;

      osg::CullFace* getOrCreateCullFaceAttribute();

   protected:
      osg::ref_ptr<osg::CullFace> myCullFace;
      osg::NodeList myGeodes;
      bool myTransparentOnly;
   };

}