4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
7 #include <AliKalmanTrack.h>
10 #include "AliBarrelTrack.h"
11 #include "AliTRDgeometry.h"
17 const unsigned kMAX_CLUSTERS_PER_TRACK=210;
19 class AliTRDtrack : public AliKalmanTrack {
21 // Represents reconstructed TRD track
25 AliTRDtrack():AliKalmanTrack(){}
26 AliTRDtrack(const AliTRDcluster *c, UInt_t index, const Double_t xx[5],
27 const Double_t cc[15], Double_t xr, Double_t alpha);
28 AliTRDtrack(const AliTRDtrack& t);
29 AliTRDtrack(const AliKalmanTrack& t, Double_t alpha);
31 Int_t Compare(const TObject *o) const;
32 void CookdEdx(Double_t low=0.05, Double_t up=0.70);
34 Double_t GetAlpha() const {return fAlpha;}
35 Int_t GetSector() const {
36 //if (fabs(fAlpha) < AliTRDgeometry::GetAlpha()/2) return 0;
37 return Int_t(TVector2::Phi_0_2pi(fAlpha)/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;}
39 Double_t GetC() const {return fC;}
40 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
41 Float_t GetClusterdQdl(Int_t i) const {return fdQdl[i];}
43 void GetCovariance(Double_t cov[15]) const;
44 Double_t GetdEdx() const {return fdEdx;}
45 Double_t GetEta() const {return fE;}
47 void GetExternalCovariance(Double_t cov[15]) const ;
48 void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
50 Double_t GetLikelihoodElectron() const { return fLhElectron; };
52 Double_t Get1Pt() const {return (1e-9*TMath::Abs(fC)/fC + fC)*GetConvConst(); }
53 Double_t GetP() const {
54 return TMath::Abs(GetPt())*sqrt(1.+GetTgl()*GetTgl());
56 Double_t GetPredictedChi2(const AliTRDcluster*, Double_t h01) const ;
57 Double_t GetPt() const {return 1./Get1Pt();}
58 void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const ;
59 void GetGlobalXYZ(Double_t &x, Double_t &y, Double_t &z) const ;
60 Int_t GetSeedLabel() const { return fSeedLab; }
61 Double_t GetSigmaC2() const {return fCcc;}
62 Double_t GetSigmaTgl2() const {return fCtt;}
63 Double_t GetSigmaY2() const {return fCyy;}
64 Double_t GetSigmaZ2() const {return fCzz;}
65 Double_t GetSnp() const {return fX*fC - fE;}
66 Double_t GetTgl() const {return fT;}
67 Double_t GetX() const {return fX;}
68 Double_t GetY() const {return fY;}
69 Double_t GetZ() const {return fZ;}
71 Int_t PropagateTo(Double_t xr, Double_t x0=8.72, Double_t rho=5.86e-3);
72 void ResetCovariance();
73 Int_t Rotate(Double_t angle);
75 void SetdEdx(Float_t dedx) {fdEdx=dedx;}
76 void SetLikelihoodElectron(Float_t l) { fLhElectron = l; };
78 void SetSampledEdx(Float_t q, Int_t i) {
79 Double_t s=GetSnp(), t=GetTgl();
80 q*= TMath::Sqrt((1-s*s)/(1+t*t));
84 void SetSeedLabel(Int_t lab) { fSeedLab=lab; }
86 Int_t Update(const AliTRDcluster* c, Double_t chi2, UInt_t i,
90 void GetBarrelTrack(AliBarrelTrack *track);
91 void AddNWrong() {fNWrong++;}
93 Int_t GetNWrong() const {return fNWrong;}
94 Int_t GetNRotate() const {return fNRotate;}
100 Int_t fSeedLab; // track label taken from seeding
101 Float_t fdEdx; // dE/dx
103 Double_t fAlpha; // rotation angle
104 Double_t fX; // running local X-coordinate of the track (time bin)
107 Double_t fY; // Y-coordinate of the track
108 Double_t fZ; // Z-coordinate of the track
110 Double_t fT; // tangent of the track momentum dip angle
111 Double_t fC; // track curvature
113 Double_t fCyy; // covariance
114 Double_t fCzy, fCzz; // matrix
115 Double_t fCey, fCez, fCee; // of the
116 Double_t fCty, fCtz, fCte, fCtt; // track
117 Double_t fCcy, fCcz, fCce, fCct, fCcc; // parameters
119 UInt_t fIndex[kMAX_CLUSTERS_PER_TRACK]; // global indexes of clusters
120 Float_t fdQdl[kMAX_CLUSTERS_PER_TRACK]; // cluster amplitudes corrected
123 Float_t fLhElectron; // Likelihood to be an electron
124 Int_t fNWrong; // number of wrong clusters
127 ClassDef(AliTRDtrack,2) // TRD reconstructed tracks