CbmStsTrackFitter.h

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// -------------------------------------------------------------------------
// -----                   CbmStsTrackFitter header file               -----
// -----                  Created 18/02/05  by V. Friese               -----
// -------------------------------------------------------------------------
 
/** CbmStsTrackFitter
 *@author V.Friese <v.friese@gsi.de>
 **
 ** Abstract base class for concrete STS track fitting algorithm.
 ** Each derived class must implement the method DoFit. This has
 ** to operate on an object of type CbmStsTrack and fill the
 ** parameters fPidHypo, fParamFirst, fParamLast, fFlag and fChi2.
 **/
 
#ifndef CBMSTSTRACKFITTER
#define CBMSTSTRACKFITTER 1
 
#include "FairTrackParam.h"
#include "TObject.h"
 
class CbmStsTrack;
 
class CbmStsTrackFitter : public TObject
{
 
  public:
    /** Default constructor **/
    CbmStsTrackFitter() {};
 
    /** Destructor **/
    virtual ~CbmStsTrackFitter() {};
 
    /** Virtual method Init. If needed, to be implemented in the
     ** concrete class. Else no action.
     **/
    virtual void Init() {};
 
    /** Abstract method DoFit. To be implemented in the concrete class.
     ** Task: Make a fit to the hits attached to the track by the track
     ** finder. Fill the track parameter member variables.
     **
     *@param pTrack      Pointer to CbmStsTrack
     *@param pidHypo     PID hypothesis for the fit. Default is pion.
     **/
    virtual Int_t DoFit(CbmStsTrack* pTrack, Int_t pidHypo = 211) = 0;
 
    /** Abstract method Extrapolate. Gives track parameters at a given z
     ** position.
     **
     *@param track  Pointer to StsTrack
     *@param z      z position
     *@param param  (return value) StsTrackParam at z
     **/
    virtual void Extrapolate(CbmStsTrack* track, Double_t z, FairTrackParam* param) = 0;
 
  private:
    CbmStsTrackFitter(const CbmStsTrackFitter&);
 
    ClassDef(CbmStsTrackFitter, 1);
};
 
#endif