#ifndef ALIMUONCONSTANTS_H
#define ALIMUONCONSTANTS_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

/* $Id$*/
// Revision of includes 07/05/2004
//
/// \ingroup base
/// \class AliMUONConstants
/// \brief MUON global constants

#include <TObject.h>

class AliMUONConstants : public TObject {
 public:
    /// Return number of chambers
    static Int_t    NCh() {return fgNCh;}
    /// Return number of tracking chambers
    static Int_t    NTrackingCh() {return fgNTrackingCh;}
    /// Return number of trigger chambers
    static Int_t    NTriggerCh() {return fgNTriggerCh;}
    /// Return number of trigger circuits
    static Int_t    NTriggerCircuit() {return fgNTriggerCircuit;}
    /// Return number of detection element
    static Int_t    NDetElem() {return fgNDetElem;}
    /// Return position of chamber i
    static Float_t  DefaultChamberZ(Int_t i) {return fgDefaultChamberZ[i];}
    /// Return ratio between trigger chambers
    static Float_t  DefaultRatioTriggerChamber(Int_t i) {return fgDefaultRatioTriggerChamber[i];}
    /// Return Inclination with respect the vertical axis of stations 345
    static Float_t  St345Inclination()       {return fgSt345inclination;}
    /// Return pointer to array of positions
    static Float_t* DefaultChamberZ()        {return fgDefaultChamberZ;}
    /// Return chamber i inner diameter
    static Float_t  Dmin(Int_t i)            {return fgDmin[i];}
    /// Return chamber i inner radius
    static Float_t  Rmin(Int_t i)            {return Dmin(i)/2.0;}
    /// Return chamber i outer diameter
    static Float_t  Dmax(Int_t i)            {return fgDmax[i];}
    /// Return chamber i outer radius
    static Float_t  Rmax(Int_t i)            {return Dmax(i)/2.0;}
    /// Return maximum zoom for event display
    static Int_t    MaxZoom()                {return fgMaxZoom;}
    /// Return half-distance between two half-chambers
    static Float_t  DzCh()                   {return fgDzCh;}
    /// Return half-distance between two slats
    static Float_t  DzSlat()                 {return fgDzSlat;}
    /// Return chamber number according z position of hit.
    static  Int_t ChamberNumber(Float_t z); 
    /// Return SqrtKx3 for Slat
    static Float_t SqrtKx3()                 {return fgSqrtKx3;}
    /// Return SqrtKy3 for Slat
    static Float_t SqrtKy3()                 {return fgSqrtKy3;}
    /// Return SqrtKx3 for Station 1 & 2
    static Float_t SqrtKx3St1()              {return fgSqrtKx3St1;}
    /// Return SqrtKy3 for Station 1 & 2
    static Float_t SqrtKy3St1()              {return fgSqrtKy3St1;}
    /// Return charge correlation (needed for response and for cluster finder !?)
    static Float_t ChargeCorrel()            {return fgChargeCorrel;}
    /// Return charge correlation for Station 1 & 2 (needed for response and for cluster finder !?)
    static Float_t ChargeCorrelSt1()         {return fgChargeCorrelSt1;}
    /// Return wire pitch
    static Float_t Pitch()    {return fgPitch;}
    /// Return wire pitch for Station 1 & 2
    static Float_t PitchSt1() {return fgPitchSt1;}

 protected:
    /// Default constructor
    AliMUONConstants() : TObject() {}
    /// Destructor
    virtual ~AliMUONConstants(){}

 private:
    static Int_t  fgNCh;                ///<  Number of Chambers    
    static Int_t  fgNTrackingCh;        ///<  Number of Tracking Chambers
    static Int_t  fgNTriggerCh;         ///<  Number of Trigger Chambers
    static Int_t  fgNTriggerCircuit;    ///<  Number of Trigger Circuits
    static Int_t  fgNDetElem;           ///<  Number of Detection Elements.

    static Float_t  fgDefaultChamberZ[14];    //!< Z-positions of chambers
    static Float_t  fgDefaultRatioTriggerChamber[4]; ///< Ratio between trigger chambers
    static Float_t  fgSt345inclination;       //!< Inclination with respect the vertical axis of stations 345
    static Float_t  fgDmin[7];                //!< Inner diameter
    static Float_t  fgDmax[7];                //!< Outer diameter

    static Float_t  fgDzCh;             ///< Half-distance between two half-chambers 
    static Float_t  fgDzSlat;           ///< Half-distance between two slat on the same chamber
    static Float_t  fgSqrtKx3;          ///< SqrtKx3 for St2 & Slat
    static Float_t  fgSqrtKy3;          ///< SqrtKy3 for St2 & Slat
    static Float_t  fgSqrtKx3St1;       ///< SqrtKx3 for Station 1 
    static Float_t  fgSqrtKy3St1;       ///< SqrtKy3 for Station 1 
 
    static Float_t  fgChargeCorrel;      ///< Charge correlation for St2 & Slats
    static Float_t  fgChargeCorrelSt1;   ///< Charge correlation for Station 1

    static Float_t  fgPitch;             ///< Wire pitch for St2 & Slats
    static Float_t  fgPitchSt1;          ///< Wire pitch for Station 1

    static Int_t    fgMaxZoom;           ///< Maximum Zoom for event display
    
    ClassDef(AliMUONConstants, 0) // MUON global constants 
};
	
#endif