#ifndef _OcclusionCullingTerrainSceneManager_H__
#define _OcclusionCullingTerrainSceneManager_H__

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

#include "OgrePrerequisites.h"
#include "OgreOcclusionCullingSceneTraverser.h"
//#include "OgreSolidHalfBoundingBox.h"

using namespace std;

namespace Ogre {
	template <typename T> class octreeless
	{
	public:
		myless(Camera *cam) { mCamera = cam; }
		//bool operator() (HierarchyNode *v1, HierarchyNode *v2) const
		bool operator() (T v1, T v2) const
		{
			v1->getCullBounds(&mAabb);
			return mAabb->getSquaredViewDepth(mCamera) > v2->getSquaredViewDepth(mCamera);
		}

	private:
		Camera *mCamera;
		AxisAlignedBox mAabb;
	};

	/**
		Class which implements a scene mangager which uses occlusion queries for culling occluded objects
	*/
	class OcclusionCullingTerrainSceneManager: public TerrainSceneManager
	{
	public:
		OcclusionCullingTerrainSceneManager();
		~OcclusionCullingTerrainSceneManager();
	
		//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 Manager.
	        @remarks
		    See setOption
		*/
		virtual bool getOption( const String &, void * );

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

	protected:
		OcclusionCullingSceneTraverser *mOcclusionCullingSceneTraverser;
	};

}
#endif // OcclusionCullingTerrainSceneManager_H