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 //-------------------------------------------------------------------------
22 class AliTracker : public TObject {
24 enum Propagation_t {kTrackInward, kTrackBack, kTrackRefit}; //type of propagation
26 virtual ~AliTracker(){}
27 virtual Int_t Clusters2Tracks(AliESD *event)=0;
28 virtual Int_t PropagateBack(AliESD *event)=0;
29 virtual Int_t RefitInward(AliESD *event)=0;
30 void SetVertex(const Double_t *xyz, const Double_t *ers=0) {
31 fX=xyz[0]; fY=xyz[1]; fZ=xyz[2];
32 if (ers) { fSigmaX=ers[0]; fSigmaY=ers[1]; fSigmaZ=ers[2]; }
36 virtual Int_t LoadClusters(TTree *)=0;
37 virtual void UnloadClusters()=0;
38 virtual AliCluster *GetCluster(Int_t index) const=0;
39 virtual Bool_t GetTrackPoint(Int_t /* index */ , AliTrackPoint& /* p */) const { return kFALSE;}
40 virtual void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
41 virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
42 Double_t GetX() const {return fX;}
43 Double_t GetY() const {return fY;}
44 Double_t GetZ() const {return fZ;}
45 Double_t GetSigmaX() const {return fSigmaX;}
46 Double_t GetSigmaY() const {return fSigmaY;}
47 Double_t GetSigmaZ() const {return fSigmaZ;}
49 static void SetFieldMap(const AliMagF* map, Bool_t uni);
50 static const AliMagF *GetFieldMap() {return fgkFieldMap;}
51 static Double_t GetBz(Float_t *r) {
52 Float_t b[3]; fgkFieldMap->Field(r,b);
53 Double_t bz=-Double_t(b[2]);
54 return (TMath::Sign(1e-13,bz) + bz);
56 static Double_t GetBz(Double_t *r) {
57 Float_t rr[]={r[0],r[1],r[2]};
60 static Double_t GetBz() {return fgBz;}
61 static Bool_t UniformField() {return fgUniformField;}
64 AliTracker(const AliTracker &atr);
66 AliTracker & operator=(const AliTracker & atr);
68 static Bool_t fgUniformField; // uniform field flag
69 static const AliMagF *fgkFieldMap; // field map
70 static Double_t fgBz; // Nominal Bz (kG)
72 Double_t fX; //X-coordinate of the primary vertex
73 Double_t fY; //Y-coordinate of the primary vertex
74 Double_t fZ; //Z-coordinate of the primary vertex
76 Double_t fSigmaX; // error of the primary vertex position in X
77 Double_t fSigmaY; // error of the primary vertex position in Y
78 Double_t fSigmaZ; // error of the primary vertex position in Z
80 ClassDef(AliTracker,3) //abstract tracker