grass_cullcallback.h

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#ifndef GRASS_CULL_CALLBACK_H
#define GRASS_CULL_CALLBACK_H

#include <osgutil/CullVisitor>
using osgUtil::CullVisitor;

#include "grass_drawable.h"
#include <osg/Drawable>
using namespace osg;



namespace grass
{



  // custom cullcallback for this class - sometimes we also need the cullvisitor to traverse
  // the more detailed version of this piece of grass which is quite specific need, so we need
  // to define our own CullCallback which will manage this all for us.
  class GrassCullCallback : public Drawable::CullCallback
  {
    virtual bool cull(NodeVisitor* nv, Drawable* drawable, RenderInfo* renderInfo) const
    {
      GrassDrawable * gd = dynamic_cast<GrassDrawable *>(drawable);
      CullVisitor * cv = dynamic_cast<CullVisitor *>(nv);
      if(gd && cv)
        gd->ManageCulling(cv, renderInfo);
      return false;
    }
  };





}; // end of namespace grass


#endif // GRASS_CULL_CALLBACK_H