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46d29e70 | 1 | #ifndef ALITRDTRACK_H |
b3a5a838 | 2 | #define ALITRDTRACK_H |
46d29e70 | 3 | |
4 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
b3a5a838 | 5 | * See cxx source for full Copyright notice */ |
46d29e70 | 6 | |
5443e65e | 7 | #include <AliKalmanTrack.h> |
b3a5a838 | 8 | #include <TMath.h> |
46d29e70 | 9 | |
9c9d2487 | 10 | #include "AliBarrelTrack.h" |
11 | #include "AliTRDgeometry.h" | |
12 | #include "TVector2.h" | |
13 | ||
46d29e70 | 14 | class AliTRDcluster; |
b3a5a838 | 15 | class AliTPCtrack; |
79e94bf8 | 16 | class AliESDtrack; |
5443e65e | 17 | |
18 | const unsigned kMAX_CLUSTERS_PER_TRACK=210; | |
46d29e70 | 19 | |
5443e65e | 20 | class AliTRDtrack : public AliKalmanTrack { |
46d29e70 | 21 | |
22 | // Represents reconstructed TRD track | |
23 | ||
46d29e70 | 24 | public: |
25 | ||
5443e65e | 26 | AliTRDtrack():AliKalmanTrack(){} |
a819a5f7 | 27 | AliTRDtrack(const AliTRDcluster *c, UInt_t index, const Double_t xx[5], |
46d29e70 | 28 | const Double_t cc[15], Double_t xr, Double_t alpha); |
29 | AliTRDtrack(const AliTRDtrack& t); | |
5443e65e | 30 | AliTRDtrack(const AliKalmanTrack& t, Double_t alpha); |
79e94bf8 | 31 | AliTRDtrack(const AliESDtrack& t); |
46d29e70 | 32 | |
a819a5f7 | 33 | Int_t Compare(const TObject *o) const; |
34 | void CookdEdx(Double_t low=0.05, Double_t up=0.70); | |
46d29e70 | 35 | |
36 | Double_t GetAlpha() const {return fAlpha;} | |
9c9d2487 | 37 | Int_t GetSector() const { |
38 | //if (fabs(fAlpha) < AliTRDgeometry::GetAlpha()/2) return 0; | |
39 | return Int_t(TVector2::Phi_0_2pi(fAlpha)/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;} | |
40 | ||
46d29e70 | 41 | Double_t GetC() const {return fC;} |
42 | Int_t GetClusterIndex(Int_t i) const {return fIndex[i];} | |
a819a5f7 | 43 | Float_t GetClusterdQdl(Int_t i) const {return fdQdl[i];} |
5443e65e | 44 | |
46d29e70 | 45 | void GetCovariance(Double_t cov[15]) const; |
c5507f6d | 46 | Double_t GetdEdx() const {return fdEdx;} |
79e94bf8 | 47 | Double_t GetPIDsignal() const {return GetdEdx();} |
46d29e70 | 48 | Double_t GetEta() const {return fE;} |
5443e65e | 49 | |
50 | void GetExternalCovariance(Double_t cov[15]) const ; | |
51 | void GetExternalParameters(Double_t& xr, Double_t x[5]) const ; | |
52 | ||
53 | Double_t GetLikelihoodElectron() const { return fLhElectron; }; | |
54 | ||
b8dc2353 | 55 | Double_t Get1Pt() const {return (1e-9*TMath::Abs(fC)/fC + fC)*GetConvConst(); } |
46d29e70 | 56 | Double_t GetP() const { |
57 | return TMath::Abs(GetPt())*sqrt(1.+GetTgl()*GetTgl()); | |
58 | } | |
fd621f36 | 59 | Double_t GetPredictedChi2(const AliTRDcluster*, Double_t h01) const ; |
5443e65e | 60 | Double_t GetPt() const {return 1./Get1Pt();} |
46d29e70 | 61 | void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const ; |
5443e65e | 62 | void GetGlobalXYZ(Double_t &x, Double_t &y, Double_t &z) const ; |
63 | Int_t GetSeedLabel() const { return fSeedLab; } | |
46d29e70 | 64 | Double_t GetSigmaC2() const {return fCcc;} |
65 | Double_t GetSigmaTgl2() const {return fCtt;} | |
66 | Double_t GetSigmaY2() const {return fCyy;} | |
67 | Double_t GetSigmaZ2() const {return fCzz;} | |
5443e65e | 68 | Double_t GetSnp() const {return fX*fC - fE;} |
69 | Double_t GetTgl() const {return fT;} | |
70 | Double_t GetX() const {return fX;} | |
71 | Double_t GetY() const {return fY;} | |
72 | Double_t GetZ() const {return fZ;} | |
46d29e70 | 73 | |
1e9bb598 | 74 | Double_t GetYat(Double_t xk) const { |
75 | //----------------------------------------------------------------- | |
76 | // This function calculates the Y-coordinate of a track at the plane x=xk. | |
77 | // Needed for matching with the TOF (I.Belikov) | |
78 | //----------------------------------------------------------------- | |
79 | Double_t c1=fC*fX - fE, r1=TMath::Sqrt(1.- c1*c1); | |
80 | Double_t c2=fC*xk - fE, r2=TMath::Sqrt(1.- c2*c2); | |
81 | return fY + (xk-fX)*(c1+c2)/(r1+r2); | |
82 | } | |
83 | ||
b3a5a838 | 84 | Int_t PropagateTo(Double_t xr, Double_t x0=8.72, Double_t rho=5.86e-3); |
5443e65e | 85 | void ResetCovariance(); |
1e9bb598 | 86 | void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); } |
46d29e70 | 87 | Int_t Rotate(Double_t angle); |
88 | ||
46d29e70 | 89 | void SetdEdx(Float_t dedx) {fdEdx=dedx;} |
5443e65e | 90 | void SetLikelihoodElectron(Float_t l) { fLhElectron = l; }; |
91 | ||
92 | void SetSampledEdx(Float_t q, Int_t i) { | |
93 | Double_t s=GetSnp(), t=GetTgl(); | |
94 | q*= TMath::Sqrt((1-s*s)/(1+t*t)); | |
95 | fdQdl[i]=q; | |
96 | } | |
97 | ||
98 | void SetSeedLabel(Int_t lab) { fSeedLab=lab; } | |
99 | ||
fd621f36 | 100 | Int_t Update(const AliTRDcluster* c, Double_t chi2, UInt_t i, |
b8dc2353 | 101 | Double_t h01); |
fd621f36 | 102 | |
9c9d2487 | 103 | // |
104 | void GetBarrelTrack(AliBarrelTrack *track); | |
105 | void AddNWrong() {fNWrong++;} | |
106 | ||
107 | Int_t GetNWrong() const {return fNWrong;} | |
108 | Int_t GetNRotate() const {return fNRotate;} | |
109 | // | |
110 | ||
111 | ||
bbf92647 | 112 | protected: |
113 | ||
5443e65e | 114 | Int_t fSeedLab; // track label taken from seeding |
bbf92647 | 115 | Float_t fdEdx; // dE/dx |
116 | ||
117 | Double_t fAlpha; // rotation angle | |
118 | Double_t fX; // running local X-coordinate of the track (time bin) | |
119 | ||
b8dc2353 | 120 | |
121 | Double_t fY; // Y-coordinate of the track | |
122 | Double_t fZ; // Z-coordinate of the track | |
123 | Double_t fE; // C*x0 | |
124 | Double_t fT; // tangent of the track momentum dip angle | |
125 | Double_t fC; // track curvature | |
bbf92647 | 126 | |
127 | Double_t fCyy; // covariance | |
128 | Double_t fCzy, fCzz; // matrix | |
b3a5a838 | 129 | Double_t fCey, fCez, fCee; // of the |
130 | Double_t fCty, fCtz, fCte, fCtt; // track | |
131 | Double_t fCcy, fCcz, fCce, fCct, fCcc; // parameters | |
b8dc2353 | 132 | |
5443e65e | 133 | UInt_t fIndex[kMAX_CLUSTERS_PER_TRACK]; // global indexes of clusters |
134 | Float_t fdQdl[kMAX_CLUSTERS_PER_TRACK]; // cluster amplitudes corrected | |
135 | // for track angles | |
b8dc2353 | 136 | |
a819a5f7 | 137 | Float_t fLhElectron; // Likelihood to be an electron |
9c9d2487 | 138 | Int_t fNWrong; // number of wrong clusters |
139 | Int_t fNRotate; | |
bbf92647 | 140 | |
a819a5f7 | 141 | ClassDef(AliTRDtrack,2) // TRD reconstructed tracks |
a2b90f83 | 142 | |
46d29e70 | 143 | }; |
144 | ||
145 | ||
46d29e70 | 146 | #endif |