//======================================================================
// File and Version Information:
// 	$Id:$
//
// Class TwoCoordIndex
//
//	 Software developed for the BaBar Detector at the SLAC B-Factory.
// Adapted for the PANDA experiment at GSI		
//		
// Class to hold coordinate and index information
// for system in which two co-ordinates specifies a channel uniquely.
// (Simplified version of class taken from BABAR framework)
// It is convenient to use 2-coordinate index to describe barel part of EMC
// to search for neigbour crystals in clustering algorithms
// 
//
//  Author List:
//
//         Phil Strother                         Imperial College
//         Stephen J. Gowdy                      University of Edinburgh
// Dima Melnichuk - adaption for PANDA							
// 
//======================================================================

#ifndef TWOCOORDINDEX_HH
#define TWOCOORDINDEX_HH

//---------------
// C++ Headers --
//---------------
#include "stdlib.h"
//#include <vector>
#include "TObject.h"
#include "NeighbourStore.h"
 
class TwoCoordIndex: public TObject
{
public:

	// Constructors
	TwoCoordIndex();
	TwoCoordIndex( long theXcoord, long theYcoord, long theIndex );
	
	// Destructors
	
	// destructor in base class
	virtual ~TwoCoordIndex();
	
	
	// Operators
	bool operator==( const TwoCoordIndex& c ) const { return index==c.index; }
	bool operator!=( const TwoCoordIndex& c ) const { return index!=c.index; }
  
	virtual const NeighbourStore itsNeighbours() const;
	 
	long itsXCoord() const      {return itsCoords[0];}
	long itsYCoord() const      {return itsCoords[1];}
	long itsIndex() const       {return index;}
	
	virtual void addToNeighbourList(TwoCoordIndex *);
	
	//check if 2 tci are neigbour or not
	bool isNeighbour(TwoCoordIndex* _tci);


protected:
	long itsCoords[2];
	long index;
	NeighbourStore theNeighbours; 

private:
      
   ClassDef(TwoCoordIndex,1)
};

#endif // TWOCOORDINDEX_HH