#ifndef _OcclusionQueriesQueryManager_H__
#define _OcclusionQueriesQueryManager_H__

#include "OgrePlatformQueryManager.h"

namespace Ogre {
  
/**
	Class which implements the QueryManager for Ogre scene queries using occlusion queries.
*/
class __declspec(dllexport) OcclusionQueriesQueryManager: public PlatformQueryManager
{
public:
    /** Constructor taking a hierarchy interface as an argument. This allows to operate
		on different hierarchy types, while reusing the implementation of the query methods.
    */
	OcclusionQueriesQueryManager(PlatformHierarchyInterface *hierarchyInterface, Viewport *vp);
    
    void ComputeCameraVisibility(const Camera &camera,
			    InfoContainer<GtpVisibility::NodeInfo> *visibleNodes,
			    InfoContainer<GtpVisibility::MeshInfo> *visibleGeometry,
				InfoContainer<GtpVisibility::PatchInfo> *visiblePatches,
			    bool relativeVisibility = false);
    
    /** 
	Uses the specified point to execute the visibility query in all directions. 
	@sa ComputeCameraVisibility()
    */
    void ComputeFromPointVisibility(const Vector3 &point,
			       InfoContainer<GtpVisibility::NodeInfo> *visibleNodes,
			       InfoContainer<GtpVisibility::MeshInfo> *visibleGeometry,
				   InfoContainer<GtpVisibility::PatchInfo> *visiblePatches,
			       bool relativeVisibility = false);
    
	bool ShootRay(const Ray &ray, std::vector<Mesh *> *visibleMeshes, bool isGlobalLine = false);  
};

} // namespace Ogre

#endif // OcclusionQueriesQueryManager