#ifndef _CoherentHierarchicalCullingManager_H__
#define _CoherentHierarchicalCullingManager_H__

#include "CullingManager.h"
#include "HierarchyInterface.h"


namespace GtpVisibility
{

/** Renders the scene with the coherent hierarchical culling algorithm. 
*/
class CoherentHierarchicalCullingManager : public CullingManager
{
public:
	CoherentHierarchicalCullingManager();
	void RenderScene();
	/** Sets assumed visibility which is a decition variable 
		wether an occlusion query should be issued or not.
		@param assumedVisibility indicates that same visibility should be assumed
		 for approximately assumedVisibility frames. 
		 if 0, no assumedVisibility will be tested.
	*/
	void SetAssumedVisibility(int assumedVisibility);
protected:
	/** Decides wether occlusion query should be issued depending on some 
		assumed visibility factor.
		@returns if occlusion query should be issued
	*/
	bool DecideQueryTest(HierarchyNode *node) const;
	int mAssumedVisibility;
};

} // namespace GtpVisibility

#endif // CoherentHierarchicalCullingManager_H