//* $Id: *//

// -------------------------------------------------------------------------
// -----                       CbmStsHit header file                   -----
// -----                  Created 30/08/06  by V. Friese               -----
// -------------------------------------------------------------------------


/** CbmStsHit
 *@author Volker Friese <v.friese@gsi.de>
 *@since 30.08.06
 *@version 1.0
 **
 ** Data class for a reconstructed hit in the STS
 ** Data level RECO
 ** Derived from CbmHit.
 ** Additional members: Channel numbers and covariance in x and y
 ** In case of pixel sensor backside channel is -1
 **/



#ifndef CBMSTSSHIT_H
#define CBMSTSSHIT_H 1



#include "TVector3.h"
#include "CbmHit.h"


class CbmStsHit : public CbmHit
{

 public:

  /** Default constructor (not for use) **/
  CbmStsHit();


  /** Standard constructor
  *@param detId     Unique detector ID
  *@param pos       Position in global c.s. [cm]
  *@param dPos      Errors of position in global c.s. [cm]
  *@param dxy       Covariance of x and y
  *@param iDigiF    Digi index front side
  *@param iDigiB    Digi index back side
  **/
  CbmStsHit(Int_t detId, TVector3& pos, TVector3& dPos, Double_t dxy, 
	    Int_t iDigiF, Int_t iDigiB);


  /** Destructor **/
  virtual ~CbmStsHit();


  /** Accessors **/
  Int_t    GetSystemId()           const { 
    return ( fDetectorID & (15<<24) ) >> 24; }
  Int_t    GetStationNr()          const { 
    return ( fDetectorID & (255<<16) ) >> 16; }
  Int_t    GetSectorNr()           const {  // sector number within station
    return ( fDetectorID & (32767<<1) ) >> 1; }
  Double_t GetCovXY()              const  { return fDxy; }
  Int_t    GetDigi(Int_t iSide) const; // front side = 0; back side = 1


  /** Screen output **/
  virtual void Print(Option_t* opt) const;


 private:

  Double32_t fDxy;   //* Covariance in x and y
  Int_t fDigiF;      //* Channel number front side
  Int_t fDigiB;      //* Channel number back side


  ClassDef(CbmStsHit,1);

};


#endif