Official Numbering for salts in St345 as described in ref Alice-int-2003-038 emds...
[u/mrichter/AliRoot.git] / TRD / AliTRDtrack.h
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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 "AliTRDgeometry.h"
304864ab 11#include "AliESDtrack.h"
9c9d2487 12#include "TVector2.h"
13
46d29e70 14class AliTRDcluster;
b3a5a838 15class AliTPCtrack;
79e94bf8 16class AliESDtrack;
5443e65e 17
8206377c 18const unsigned kMAXCLUSTERSPERTRACK=210;
46d29e70 19
5443e65e 20class AliTRDtrack : public AliKalmanTrack {
46d29e70 21
8206377c 22 //////////////////////////////////////////////////////////////////
23 // Represents a reconstructed TRD track //
24 //////////////////////////////////////////////////////////////////
25
4f1c04d3 26 friend class AliTRDtracker;
8206377c 27
46d29e70 28public:
29
16d9fbba 30 AliTRDtrack():AliKalmanTrack(){fBackupTrack=0;}
a819a5f7 31 AliTRDtrack(const AliTRDcluster *c, UInt_t index, const Double_t xx[5],
46d29e70 32 const Double_t cc[15], Double_t xr, Double_t alpha);
33 AliTRDtrack(const AliTRDtrack& t);
5443e65e 34 AliTRDtrack(const AliKalmanTrack& t, Double_t alpha);
79e94bf8 35 AliTRDtrack(const AliESDtrack& t);
16d9fbba 36 ~AliTRDtrack();
a819a5f7 37 Int_t Compare(const TObject *o) const;
4f1c04d3 38 void CookdEdx(Double_t low=0.05, Double_t up=0.55);
8206377c 39 Float_t StatusForTOF();
46d29e70 40 Double_t GetAlpha() const {return fAlpha;}
9c9d2487 41 Int_t GetSector() const {
42 //if (fabs(fAlpha) < AliTRDgeometry::GetAlpha()/2) return 0;
43 return Int_t(TVector2::Phi_0_2pi(fAlpha)/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;}
44
46d29e70 45 Double_t GetC() const {return fC;}
46 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
a819a5f7 47 Float_t GetClusterdQdl(Int_t i) const {return fdQdl[i];}
5443e65e 48
46d29e70 49 void GetCovariance(Double_t cov[15]) const;
c5507f6d 50 Double_t GetdEdx() const {return fdEdx;}
79e94bf8 51 Double_t GetPIDsignal() const {return GetdEdx();}
8206377c 52 Float_t GetPIDsignals(Int_t i) const {return fdEdxPlane[i];}
53 Int_t GetPIDTimBin(Int_t i) const {return fTimBinPlane[i];}
46d29e70 54 Double_t GetEta() const {return fE;}
5443e65e 55
56 void GetExternalCovariance(Double_t cov[15]) const ;
57 void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
58
59 Double_t GetLikelihoodElectron() const { return fLhElectron; };
60
b8dc2353 61 Double_t Get1Pt() const {return (1e-9*TMath::Abs(fC)/fC + fC)*GetConvConst(); }
46d29e70 62 Double_t GetP() const {
63 return TMath::Abs(GetPt())*sqrt(1.+GetTgl()*GetTgl());
64 }
e0d47c25 65 virtual Double_t GetPredictedChi2(const AliCluster*) const { return 0.0; };
8206377c 66 Double_t GetPredictedChi2(const AliTRDcluster *c, Double_t h01) const ;
5443e65e 67 Double_t GetPt() const {return 1./Get1Pt();}
46d29e70 68 void GetPxPyPz(Double_t &px, Double_t &py, Double_t &pz) const ;
5443e65e 69 void GetGlobalXYZ(Double_t &x, Double_t &y, Double_t &z) const ;
70 Int_t GetSeedLabel() const { return fSeedLab; }
46d29e70 71 Double_t GetSigmaC2() const {return fCcc;}
72 Double_t GetSigmaTgl2() const {return fCtt;}
73 Double_t GetSigmaY2() const {return fCyy;}
74 Double_t GetSigmaZ2() const {return fCzz;}
5443e65e 75 Double_t GetSnp() const {return fX*fC - fE;}
76 Double_t GetTgl() const {return fT;}
77 Double_t GetX() const {return fX;}
78 Double_t GetY() const {return fY;}
79 Double_t GetZ() const {return fZ;}
46e2d86c 80 UInt_t * GetBackupIndexes() {return fIndexBackup;}
81 UInt_t * GetIndexes() {return fIndex;}
8206377c 82 //-----------------------------------------------------------------
83 // This function calculates the Y-coordinate of a track at the plane x=xk.
84 // Needed for matching with the TOF (I.Belikov)
3c625a9b 85 Double_t GetYat(Double_t xk) const {
1e9bb598 86 Double_t c1=fC*fX - fE, r1=TMath::Sqrt(1.- c1*c1);
87 Double_t c2=fC*xk - fE, r2=TMath::Sqrt(1.- c2*c2);
88 return fY + (xk-fX)*(c1+c2)/(r1+r2);
89 }
8206377c 90 //-----------------------------------------------------------------
91 Int_t GetProlongation(Double_t xk, Double_t &y, Double_t &z);
4f1c04d3 92
8206377c 93 void SetStop(Bool_t stop) {fStopped=stop;}
94 Bool_t GetStop() const {return fStopped;}
1e9bb598 95
b3a5a838 96 Int_t PropagateTo(Double_t xr, Double_t x0=8.72, Double_t rho=5.86e-3);
5443e65e 97 void ResetCovariance();
46e2d86c 98 void ResetCovariance(Float_t mult);
8206377c 99 void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
46d29e70 100 Int_t Rotate(Double_t angle);
101
46d29e70 102 void SetdEdx(Float_t dedx) {fdEdx=dedx;}
8206377c 103 void SetPIDsignals(Float_t dedx, Int_t i) {fdEdxPlane[i]=dedx;}
104 void SetPIDTimBin(Int_t timbin, Int_t i) {fTimBinPlane[i]=timbin;}
5443e65e 105 void SetLikelihoodElectron(Float_t l) { fLhElectron = l; };
106
107 void SetSampledEdx(Float_t q, Int_t i) {
4f1c04d3 108 Double_t s=GetSnp(), t=GetTgl();
109 q*= TMath::Sqrt((1-s*s)/(1+t*t));
110 fdQdl[i]=q;
111 }
112 void SetSampledEdx(Float_t q) {
5443e65e 113 Double_t s=GetSnp(), t=GetTgl();
114 q*= TMath::Sqrt((1-s*s)/(1+t*t));
4f1c04d3 115 fdQdl[fNdedx]=q;
116 fNdedx++;
5443e65e 117 }
118
119 void SetSeedLabel(Int_t lab) { fSeedLab=lab; }
120
e0d47c25 121 Int_t Update(const AliCluster*, Double_t, UInt_t) { return 0; };
fd621f36 122 Int_t Update(const AliTRDcluster* c, Double_t chi2, UInt_t i,
b8dc2353 123 Double_t h01);
46e2d86c 124 Int_t UpdateMI(const AliTRDcluster* c, Double_t chi2, UInt_t i,
3c625a9b 125 Double_t h01, Int_t plane);
fd621f36 126
8206377c 127 void AddNWrong() {fNWrong++;}
9c9d2487 128
8206377c 129 Int_t GetNWrong() const {return fNWrong;}
130 Int_t GetNRotate() const {return fNRotate;}
131 Int_t GetNCross() const {return fNCross;}
132 void IncCross() {fNCross++; if (fBackupTrack) fBackupTrack->IncCross();}
16d9fbba 133 AliTRDtrack * GetBackupTrack(){return fBackupTrack;}
8206377c 134 void MakeBackupTrack();
9c9d2487 135
bbf92647 136protected:
137
8206377c 138 Int_t fSeedLab; // track label taken from seeding
139 Float_t fdEdx; // dE/dx
140 Float_t fdEdxPlane[kNPlane]; // dE/dx from all 6 planes
141 Int_t fTimBinPlane[kNPlane]; // time bin of Max cluster from all 6 planes
bbf92647 142
8206377c 143 Double_t fAlpha; // rotation angle
144 Double_t fX; // running local X-coordinate of the track (time bin)
145 Bool_t fStopped; // track stop indication
b8dc2353 146
147 Double_t fY; // Y-coordinate of the track
148 Double_t fZ; // Z-coordinate of the track
149 Double_t fE; // C*x0
150 Double_t fT; // tangent of the track momentum dip angle
151 Double_t fC; // track curvature
bbf92647 152
153 Double_t fCyy; // covariance
154 Double_t fCzy, fCzz; // matrix
b3a5a838 155 Double_t fCey, fCez, fCee; // of the
156 Double_t fCty, fCtz, fCte, fCtt; // track
157 Double_t fCcy, fCcz, fCce, fCct, fCcc; // parameters
b8dc2353 158
8206377c 159 UInt_t fIndex[kMAXCLUSTERSPERTRACK]; // global indexes of clusters
160 UInt_t fIndexBackup[kMAXCLUSTERSPERTRACK]; // backup indexes of clusters - used in iterations
161 Float_t fdQdl[kMAXCLUSTERSPERTRACK]; // cluster amplitudes corrected
162 // for track angles
b8dc2353 163
a819a5f7 164 Float_t fLhElectron; // Likelihood to be an electron
8206377c 165 Int_t fNWrong; // number of wrong clusters
166 Int_t fNRotate; // number of rotation
167 Int_t fNCross; // number of the cross materials
168 Int_t fNExpected; // expected number of cluster
169 Int_t fNLast; // number of clusters in last 2 layers
170 Int_t fNExpectedLast; // number of expected clusters on last 2 layers
171 Int_t fNdedx; // number of clusters for dEdx measurment
172 Float_t fChi2Last; // chi2 in the last 2 layers
173
16d9fbba 174 AliTRDtrack * fBackupTrack; //! backup track
8206377c 175
a819a5f7 176 ClassDef(AliTRDtrack,2) // TRD reconstructed tracks
a2b90f83 177
46d29e70 178};
179
180
46d29e70 181#endif