#ifndef _PlatformQueryManager_H__
#define _PlatformQueryManager_H__

#include "VisibilityInfo.h"
#include "QueryManager.h"
#include "HierarchyInterface.h"

namespace Ogre {
  
/**
	Class which implements the QueryManager for Ogre scene queries.
*/
class __declspec(dllexport) PlatformQueryManager: public GtpVisibility::QueryManager
{
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.
    */
	PlatformQueryManager(GtpVisibility::HierarchyInterface *hierarchyInterface, 
		                 Viewport *vp, int queryModes);
    
    /** 
	Uses the specified point to execute the visibility query in all directions. 
	@sa ComputeCameraVisibility()
    */
    void ComputeFromPointVisibility(const Vector3 &point,
			       GtpVisibility::NodeInfoContainer *visibleNodes,
			       GtpVisibility::MeshInfoContainer *visibleGeometry,
				   GtpVisibility::PatchInfoContainer *visiblePatches,
			       bool relativeVisibility = false);
  
	void ComputeCameraVisibility(const Camera &camera,
			       GtpVisibility::NodeInfoContainer *visibleNodes,
			       GtpVisibility::MeshInfoContainer *visibleGeometry,
				   GtpVisibility::PatchInfoContainer *visiblePatches,
			       bool relativeVisibility = false);
  
	bool ShootRay(const Ray &ray, std::vector<Mesh *> *visibleMeshes, bool isGlobalLine = false);  

	/** Sets a viewport for rendering.
	*/
	void SetViewport(Viewport *vp);

protected:
#ifdef ITEM_BUFFER
	void CollectItemBufferResults(
				GtpVisibility::MeshInfoContainer *visibleGeometry,
				GtpVisibility::PatchInfoContainer *visiblePatches);

	void InitItemBuffer(GtpVisibility::MeshInfoContainer *visibleGeometry,
						GtpVisibility::PatchInfoContainer *visiblePatches);
#endif // ITEM_BUFFER

	Viewport *mViewport;
	
	bool mWasInitialised;
};

} // namespace Ogre

#endif // PlatformQueryManager