#ifndef _VisibilityOctreeSceneManager_H__
#define _VisibilityOctreeSceneManager_H__

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

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

namespace Ogre {

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

	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();
	
	/** Render a set of objects, see renderSingleObject for param definitions 
		Override so we can handle delayed rendering of transparent objects
	*/
	virtual void renderObjects(const RenderPriorityGroup::TransparentRenderablePassList& objs, 
            bool doLightIteration, const LightList* manualLightList = 0);

	/** Writes out stats into the Ogre log file.
	*/
	void WriteLog();

	/** Override pass so we can do the z-fail pass */
	Pass* setPass(Pass* pass);

protected:
	/** Creates material for depth pass, e.g., a pass that only fills the depth buffer */
	void CreateDepthPass();
	void ShowVisualization(Camera *cam);
	OctreeHierarchyInterface *mHierarchyInterface;
	GtpVisibility::VisibilityManager *mVisibilityManager;
	
	bool mShowVisualization;
	bool mSkipTransparents;
	bool mVisualizeCulledNodes;

	bool mRenderNodesForViz;
	bool mRenderNodesContentForViz;
	bool mDelayRenderTransparents;
	bool mUseDepthPass;
	bool mIsDepthPass;

	Pass *mDepthPass;
};

} // namespace Ogre

#endif // VisibilityOctreeSceneManager_H