#ifndef TCmueHit_hh
#define TCmueHit_hh

#include "TObject.h"

class TStnDataBlock;
class AbsEvent;

class TCmueHit : public TObject {

  friend Int_t StntupleInitCmuDataBlock(TStnDataBlock* block, 
					AbsEvent*      event, 
					int            mode);

					// bits 0-7 are used by the system,
					// use bit8 as "used" flag
					// or ROOT is using bits 24-31???
  enum  {kUsedBit = BIT(8) };

protected: 
  Float_t  fZ;				// 
  Float_t  fDriftDistance;
  Int_t    fSideNumber;			// east=0, west=1
  Int_t    fWedgeNumber;		// 0-23
  Int_t    fLayerNumber;		// 0-3
  Int_t    fStackNumber;		// 0-5
  Int_t    fChamberNumber;		// 0-1
//-----------------------------------------------------------------------------
public:
  TCmueHit();
  virtual ~TCmueHit();
					// ****** accessors

  Float_t&  Z            () { return fZ;             }
  Float_t&  DriftDistance() { return fDriftDistance; }
  Int_t&    SideNumber   () { return fSideNumber;    }
  Int_t&    WedgeNumber  () { return fWedgeNumber;   }
  Int_t&    LayerNumber  () { return fLayerNumber;   }
  Int_t&    StackNumber  () { return fStackNumber;   }
  Int_t&    ChamberNumber() { return fChamberNumber; }
  Int_t     WireNumber   () const { return fChamberNumber+2*fStackNumber; }
  Int_t     Used         () const { return TestBit(kUsedBit); }

					// ****** modifiers

  void      SetUsed() { SetBit(kUsedBit); }

					// ****** overloaded methods of 
					// TObject
  void Print(Option_t* opt = "") const;

  ClassDef (TCmueHit,1)
};

#endif