DtOsgEffectTextureVisitor.h

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/****************************************************************************** 
** Copyright (c) 2012 MAK Technologies, Inc. 
** All rights reserved. 
******************************************************************************/ 


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/DtOsgEffectTextureController.h>
#include <osg/NodeVisitor>
#include <osgDB/Options>
#include <set>

namespace makVrv
{
   class DtOsgEffectTextureController;
   class DtOsgFileCache;
   class DtOsgShaderManager;

   class DT_DLL_VRVOSG DtOsgEffectTextureVisitor : public osg::NodeVisitor
   {
   public:
      static const char* IgnoreHint;

      DtOsgEffectTextureVisitor(DtOsgFileCache& fileCache, DtOsgShaderManager& shaderMgr, const osgDB::Options* options, DtDe& de);

      virtual ~DtOsgEffectTextureVisitor();

      void reset();

      unsigned getNumEffectTexturesInstalled() const;

      bool isEffectTexture(osg::Texture* tex) const;

      static void setIgnoreHint(osg::Object* obj, bool val);

   public: // osg::NodeVisitor overrides

      void apply(osg::Node& node);
      void apply(osg::Geode& geode);

   protected:
      // Check whether an object should be ignored during traversal
      bool ignore(osg::Object* obj);

      // scan a stateset and apply effect textures as necessary.
      void apply(osg::StateSet* stateSet);
      
      bool installEffectTextures(osg::Texture* tex, int texUnit, osg::StateSet* stateSet);

      unsigned      myCount;

      typedef std::vector<osg::ref_ptr<DtOsgEffectTextureController> > Controllers;
      Controllers myControllers;
      osg::ref_ptr<const osgDB::Options> myDbOptions;

      DtOsgFileCache& myFileCache;
      DtOsgShaderManager& myShaderMgr;
      DtDe& myDe; // CAUTION: only threadsafe usage of myDe is allowed from this class
   };
}