3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 //-------------------------------------------------------------------------
10 // that is the base for AliTPCtracker, AliITStrackerV2 and AliTRDtracker
11 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
12 //-------------------------------------------------------------------------
21 class AliExternalTrackParam;
24 class AliTracker : public TObject {
27 virtual ~AliTracker(){}
28 virtual Int_t Clusters2Tracks(AliESDEvent *event)=0;
29 virtual Int_t PropagateBack(AliESDEvent *event)=0;
30 virtual Int_t RefitInward(AliESDEvent *event)=0;
31 void SetVertex(const Double_t *xyz, const Double_t *ers=0) {
32 fX=xyz[0]; fY=xyz[1]; fZ=xyz[2];
33 if (ers) { fSigmaX=ers[0]; fSigmaY=ers[1]; fSigmaZ=ers[2]; }
37 virtual Int_t LoadClusters(TTree *)=0;
38 virtual void UnloadClusters()=0;
39 virtual AliCluster *GetCluster(Int_t index) const=0;
40 virtual Bool_t GetTrackPoint(Int_t /* index */ , AliTrackPoint& /* p */) const { return kFALSE;}
41 virtual Bool_t GetTrackPointTrackingError(Int_t /* index */,
42 AliTrackPoint& /* p */, const AliESDtrack* /* t */) { return kFALSE;}
43 virtual void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
44 virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
45 Double_t GetX() const {return fX;}
46 Double_t GetY() const {return fY;}
47 Double_t GetZ() const {return fZ;}
48 Double_t GetSigmaX() const {return fSigmaX;}
49 Double_t GetSigmaY() const {return fSigmaY;}
50 Double_t GetSigmaZ() const {return fSigmaZ;}
53 Double_t MeanMaterialBudget(Double_t *start,Double_t *end,Double_t *mparam);
55 Bool_t PropagateTrackTo(AliExternalTrackParam *track, Double_t x, Double_t m,
56 Double_t maxStep, Bool_t rotateTo=kTRUE, Double_t maxSnp=0.8);
58 static void SetFieldMap(const AliMagF* map, Bool_t uni);
59 static const AliMagF *GetFieldMap() {return fgkFieldMap;}
60 static Double_t GetBz(Float_t *r);
61 static Double_t GetBz(Double_t *r) {
62 Float_t rr[]={r[0],r[1],r[2]};
65 static Double_t GetBz() {return fgBz;}
66 static Bool_t UniformField() {return fgUniformField;}
69 AliTracker(const AliTracker &atr);
71 AliTracker & operator=(const AliTracker & atr);
73 static Bool_t fgUniformField; // uniform field flag
74 static const AliMagF *fgkFieldMap; // field map
75 static Double_t fgBz; // Nominal Bz (kG)
77 Double_t fX; //X-coordinate of the primary vertex
78 Double_t fY; //Y-coordinate of the primary vertex
79 Double_t fZ; //Z-coordinate of the primary vertex
81 Double_t fSigmaX; // error of the primary vertex position in X
82 Double_t fSigmaY; // error of the primary vertex position in Y
83 Double_t fSigmaZ; // error of the primary vertex position in Z
85 ClassDef(AliTracker,3) //abstract tracker