#ifndef _VisibilitySceneManager_H__
#define _VisibilitySceneManager_H__

#include "OgreSceneNodeHierarchyInterface.h"
#include "VisibilityManager.h"

#include <OgreSceneNode.h>
#include <OgreSceneManager.h>
#include <OgrePrerequisites.h>

namespace Ogre {

/**
	This class implements the default scene manager, using occlusion queries for 
	visibility culling.
*/
class VisibilitySceneManager : public SceneManager
{
public:
	VisibilitySceneManager(GtpVisibility::VisibilityManager *visManager);
	~VisibilitySceneManager();

	/** Overriden from SceneManager. Renders the scene using occlusion culling.
	@remark the type of algorithm is specified by the occlusion culling manager type
	using by the visibility manager.
	*/
	void _renderVisibleObjects();
	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:
	
	SceneNodeHierarchyInterface *mHierarchyInterface;
	GtpVisibility::VisibilityManager *mVisibilityManager;

	bool mUseVisibilityCulling;
	bool mShowVisualization;

	bool mVisualizeCulledNodes;
};
} // namespace Ogre
#endif // VisibilitySceneManager_H