#ifndef _BspHierarchyInterface_H__
#define _BspHierarchyInterface_H__

#include "OgrePlatformHierarchyInterface.h"

namespace Ogre {
/**
	This class implements the hierarchy interface for the Ogre bsp hierarchy.
*/
class BspHierarchyInterface : public PlatformHierarchyInterface
{
public:
	BspHierarchyInterface(SceneManager *sm, RenderSystem *rsys);

	/** Gets the given option for the scene traverser.
	    @remarks
		See setOption
	*/
	//bool getOption( const String &, void * );
	//bool getOptionKeys( StringVector &refKeys );
	void PullUpVisibility(GtpVisibility::HierarchyNode *node);
	/** Traverses given node.
		@param node current node
		@remark pushes children on distance queue
	*/
	void TraverseNode(GtpVisibility::HierarchyNode *node);
	void RenderNode(GtpVisibility::HierarchyNode *node);
	bool IsLeaf(GtpVisibility::HierarchyNode *node) const;
	bool HasGeometry(GtpVisibility::HierarchyNode *node) const;
	float GetSquaredDistance(GtpVisibility::HierarchyNode *node) const;
	
	void SetNodeVisible(GtpVisibility::HierarchyNode *node, const bool visible);
	void SetLastVisited(GtpVisibility::HierarchyNode *node, 
						const unsigned int frameId);

	bool IsNodeVisible(GtpVisibility::HierarchyNode *node) const;
	unsigned int LastVisited(GtpVisibility::HierarchyNode *node) const;

protected:
	/** Returns pointer to the bounding box of the node.
		@param node current hierarchy node
		@returns bounding box of current node
	*/
	AxisAlignedBox *GetBoundingBox(GtpVisibility::HierarchyNode *node);
	
	unsigned int mNumOctreeNodes;
};
} // namespace Ogre

#endif // BspHierarchyInterface_H