#ifndef _PlatformQueryManager_H__
#define _PlatformQueryManager_H__

#include "VisibilityInfo.h"
#include "QueryManager.h"
#include "OgrePlatformHierarchyInterface.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
	onm different hierarchy types, while reusing the implementation of the query methods.
    */
	PlatformQueryManager(PlatformHierarchyInterface *hierarchyInterface, Viewport *vp);
    
    /** 
	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,
			       bool relativeVisibility = false);
    
  /** 
      Ray shooting interface: finds an intersection with objects in the scene.

      @param ray The given input ray (assuming the ray direction is normalized)

      @param visibleMeshes List of meshes intersecting the ray

      @param isGlobalLine If false only first intersection with opaque object is returned.
      Otherwise all intersections of the ray with the scene are found.

      @return true if there is any intersection. 
	*/
    virtual bool
    ShootRay(const Ray &ray,
	     std::vector<Mesh *> *visibleMeshes,
	     bool isGlobalLine = false
	     );  

	/** Sets a viewport for rendering.
	*/
	void SetViewport(Viewport *vp);
	
protected:
	Viewport *mViewport;
	bool mWasInitialised;
};

} // namespace Ogre

#endif // PlatformQueryManager