//-----------------------------------------------------------------------
// File and Version Information:
// 	$Id: $
//
// Description:
//	EmcXtal Class - 
//
//	 Software developed for the BaBar Detector at the SLAC B-Factory.
// Adapted for the PANDA experiment at GSI		
//		
// Author List:
//	Gautier Hamel de Monchenault - CEN Saclay & Lawrence Berkeley Lab
//      Stephen J. Gowdy              University of Edinburgh
// Dima Melnichuk - adaption for PANDA			
//
// Copyright Information:
//	Copyright (C) 1996		Lawrence Berkeley Laboratory
//	Copyright (C) 1996	       CEA - Centre d'Etude de Saclay
//------------------------------------------------------------------------
#ifndef EMCXTAL_HH
#define EMCXTAL_HH

#include <vector>
#include "TVector3.h"
#include "TGeoArb8.h"

class TVector3;
class TGeoTrap;
class TRotation;
class TwoCoordIndex;


//		---------------------
// 		-- Class Interface --
//		---------------------

class EmcXtal:public TObject
{

public:

  // Constructors
  EmcXtal( const TwoCoordIndex *id, const TGeoTrap &trap, const TVector3 &pos, const TRotation &rot, const TVector3 &reflect);
    
  // Destructor
  virtual ~EmcXtal();

  // Operators
  virtual bool operator==( const EmcXtal& compare ) const;

  // Accessors (const)
  const TwoCoordIndex* myIndex() const;
  const TVector3& centre() const;
  const TVector3& frontCentre() const;
  const TVector3& normalToFrontFace() const ;

  double npAngle() const;

private:

  const TwoCoordIndex* fTCIIndex;//!
  double fLength; // length of the crystal 
  const TGeoTrap fTrap;
  TVector3 fCentre;
  TVector3 fFrontCentre;
  TVector3 fNormalToFrontFace;

  ClassDef(EmcXtal,1)
};

#endif // EMCXTAL_HH