1 //Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved.
2 //See cxx source for full Copyright notice
4 //The purpose of this class is to permorm the ITS tracking.
6 // The constructor has the task to inizialize some private members.
7 // The method DoTracking is written to be called by a macro. It gets the event
8 // number, the minimum and maximum order number of TPC tracks that are to be
9 // tracked trough the ITS, and the file where the recpoints are registered.
11 // The method AliiTStracking is a recursive function that performs the
12 // tracking trough the ITS
14 // The method Intersection found the layer, ladder and detector where the
15 // intersection take place and caluclate the cohordinates of this
16 // intersection. It returns an integer that is 0 if the intersection has
17 // been found successfully.
19 // The two mwthods Kalmanfilter and kalmanfiltervert operate the
20 // kalmanfilter without and with the verteximposition respectively.
22 #ifndef ALIITSTRACKERV1_H
23 #define ALIITSTRACKERV1_H
37 class AliITSTrackerV1 : public TObject {
40 AliITSTrackerV1(AliITS* IITTSS, Bool_t flag);
41 AliITSTrackerV1(const AliITSTrackerV1 &cobj);
43 AliITSTrackerV1 &operator=(AliITSTrackerV1 obj);
44 void DoTracking(Int_t evNumber, Int_t minTr, Int_t maxTr, TFile *file);
45 void RecursiveTracking(TList *trackITSlist);
46 Int_t Intersection(AliITSTrackV1 &track, Int_t layer,Int_t &ladder,
48 void KalmanFilter(AliITSTrackV1 *newtrack, TVector &cluster,
50 void KalmanFilterVert(AliITSTrackV1 *newtrack, TVector &cluster,
52 //void KalmanFilterVert(AliITSTrackV1 *newtrack, TVector &cluster,
53 // Double_t sigma[2], Double_t chi2pred);
56 AliITS* fITS; //! pointer to AliITS
57 AliITSTrackV1 *fresult; // result is a pointer to the final best track
58 Double_t fPtref; // transvers momentum obtained from TPC tracking
59 Double_t fChi2max; // cluster with chi2>chi2max are cut. It is
60 // pt dependend. aggiunto il 31-7-2001
61 Double_t fepsphi; //eps for definition window in phi aggiunto il 1-8-2001
62 Double_t fepsz; //eps for definition window in z aggiunto il 1-8-2001
63 TObjArray *frecPoints; // pointer to RecPoints
64 Int_t **fvettid; // flag vector of used clusters
65 Bool_t fflagvert; // a flag to impose or not the vertex constraint
66 AliITSRad *frl; // pointer to get the radiation lenght matrix
67 Int_t fNlad[6]; // Number of ladders for a given layer
68 Int_t fNdet[6]; // Number of detector for a given layer
69 Double_t fAvrad[6]; // Average radius for a given layer
70 Double_t fDetx[6];// Semidimension of detectors along x axis for a given layer
71 Double_t fDetz[6];// Semidimension of detectors along z axis for a given layer
72 Double_t **fzmin;// Matrix of zmin for a given layer and a given detector
73 Double_t **fzmax;// Matrix of zmax for a given layer and a given detector
74 Double_t **fphimin;// Matrix of phimin for a given layer and a given ladder
75 Double_t **fphimax;// Matrix of phimax for a given layer and a given ladder
76 Double_t **fphidet; // azimuthal angle for a given layer and a given ladder
77 Double_t fFieldFactor; // Magnetic filed factor
78 //TStopwatch *fTimerKalman; // timer for kalman filter
79 //TStopwatch *fTimerIntersection; // timer for Intersection
81 ClassDef(AliITSTrackerV1,1) //????