Automatic treatment of the magnetic field value

[u/mrichter/AliRoot.git] / ITS / AliITSTrackerV1.h

//Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
//See cxx source for full Copyright notice                               */
//
//The purpose of this class is to permorm the ITS tracking.
//
//The constructor has the task to inizialize some private members.
//The method DoTracking is written to be called by a macro. It gets the event number, the minimum and maximum
//order number of TPC tracks that are to be tracked trough the ITS, and the file where the recpoints are
//registered.
//
//The method AliiTStracking is a recursive function that performs the tracking trough the ITS
//
//The method Intersection found the layer, ladder and detector whre the intersection take place and caluclate
//the cohordinates of this intersection.  It returns an integer that is 0 if the intersection has been found
//successfully.
//
//The two mwthods Kalmanfilter and kalmanfiltervert operate the kalmanfilter without and with the vertex
//imposition respectively.

#ifndef ALIITSTRACKERV1_H
#define ALIITSTRACKERV1_H

#include <TObject.h>

class AliITS;
class TObjArray;
class TVector;
class TMatrix;
class AliITSTrackV1;
class AliITS;
class AliITSRad;
class AliITSgeoinfo;

class AliITSTrackerV1 : public TObject {

  public:
    
	 AliITSTrackerV1(AliITS* IITTSS, Bool_t flag);
	 
	 AliITSTrackerV1(const AliITSTrackerV1 &cobj);
	   
    AliITSTrackerV1 &operator=(AliITSTrackerV1 obj);
	 
	 void DoTracking(Int_t evNumber, Int_t minTr, Int_t maxTr, TFile *file);
	 
	 void RecursiveTracking(TList *trackITSlist);

    Int_t Intersection(AliITSTrackV1 &track, Double_t rk,Int_t layer, Int_t &ladder, Int_t &detector); 

    void KalmanFilter(AliITSTrackV1 *newtrack, TVector &cluster, Double_t sigma[2]);
    
    void KalmanFilterVert(AliITSTrackV1 *newtrack, TVector &cluster, Double_t sigma[2]);
	 
  private:

    AliITS* fITS;              // pointer to AliITS
	 AliITSTrackV1 *fresult;    // result is a pointer to the final best track
	 Double_t fPtref;           // transvers momentum obtained from TPC tracking
	 TObjArray  *frecPoints;    // pointer to RecPoints
	 Int_t **fvettid;           // flag vector of used clusters
	 Bool_t fflagvert;          // a flag to impose or not the vertex constraint
	 AliITSRad *frl;            // pointer to get the radiation lenght matrix 
	 
	 Int_t fNlad[6];            // Number of ladders for a given layer
	 Int_t fNdet[6];            // Number of detector for a given layer
	 Float_t fAvrad[6];         // Average radius for a given layer
	 Float_t fDetx[6];          // Semidimension of detectors along x axis for a given layer
	 Float_t fDetz[6];          // Semidimension of detectors along z axis for a given layer
	 
	 Double_t fFieldFactor;      // Magnetic filed factor
	 

    ClassDef(AliITSTrackerV1,1)
};

#endif