#ifndef _VisibilityTerrainSceneManager_H__
#define _VisibilityTerrainSceneManager_H__

#include <OgreSceneNode.h>
#include <OgreOctreeSceneManager.h>
#include <OgreTerrainSceneManager.h>
#include <OgreOctreeSceneQuery.h>
#include <OgreOctreeNode.h>
#include <OgreOctreeCamera.h>
#include <OgrePrerequisites.h>

#include "OgreOctreeHierarchyInterface.h"
#include "VisibilityManager.h"

namespace Ogre {

/**
	This class extends the terrain scene manager,
	using occlusion queries for visibility culling.
*/
class VisibilityTerrainSceneManager: public TerrainSceneManager
{
public:
	VisibilityTerrainSceneManager(GtpVisibility::VisibilityManager *visManager);
	~VisibilityTerrainSceneManager();

	void _renderVisibleObjects(void);
	void _findVisibleObjects(Camera* cam, bool onlyShadowCasters);
	void _updateSceneGraph(Camera* cam);

	/** Sets the given option for the SceneManager
			    @remarks
		Options are:
		"Algorithm", int *;			
	*/
	
	virtual bool setOption( const String &, const void * );
	/** Gets the given option for the Scene VisibilityManager.
	    @remarks
		See setOption
	*/
	virtual bool getOption( const String &, void * );

	bool getOptionValues( const String & key, StringVector &refValueList );
	bool getOptionKeys( StringVector &refKeys );

	/** Sets the visibility manager.
		@param visManager the visibility manager
	*/
	void setVisibilityManager(GtpVisibility::VisibilityManager *visManager);
	/** See set.
	*/
	GtpVisibility::VisibilityManager *getVisibilityManager();
	
protected:

	OctreeHierarchyInterface *mHierarchyInterface;
	GtpVisibility::VisibilityManager *mVisibilityManager;
};

//}  // namespace GtpVisibility
} // namespace Ogre

#endif // CullingTerrainSceneManager_H