Replacing fabs by TMath::Abs
[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 "AliBarrelTrack.h"
11#include "AliTRDgeometry.h"
12#include "TVector2.h"
13
46d29e70 14class AliTRDcluster;
b3a5a838 15class AliTPCtrack;
79e94bf8 16class AliESDtrack;
5443e65e 17
18const unsigned kMAX_CLUSTERS_PER_TRACK=210;
46d29e70 19
5443e65e 20class AliTRDtrack : public AliKalmanTrack {
46d29e70 21
22// Represents reconstructed TRD track
23
46d29e70 24public:
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
b3a5a838 74 Int_t PropagateTo(Double_t xr, Double_t x0=8.72, Double_t rho=5.86e-3);
5443e65e 75 void ResetCovariance();
46d29e70 76 Int_t Rotate(Double_t angle);
77
46d29e70 78 void SetdEdx(Float_t dedx) {fdEdx=dedx;}
5443e65e 79 void SetLikelihoodElectron(Float_t l) { fLhElectron = l; };
80
81 void SetSampledEdx(Float_t q, Int_t i) {
82 Double_t s=GetSnp(), t=GetTgl();
83 q*= TMath::Sqrt((1-s*s)/(1+t*t));
84 fdQdl[i]=q;
85 }
86
87 void SetSeedLabel(Int_t lab) { fSeedLab=lab; }
88
fd621f36 89 Int_t Update(const AliTRDcluster* c, Double_t chi2, UInt_t i,
b8dc2353 90 Double_t h01);
fd621f36 91
9c9d2487 92 //
93 void GetBarrelTrack(AliBarrelTrack *track);
94 void AddNWrong() {fNWrong++;}
95
96 Int_t GetNWrong() const {return fNWrong;}
97 Int_t GetNRotate() const {return fNRotate;}
98 //
99
100
bbf92647 101protected:
102
5443e65e 103 Int_t fSeedLab; // track label taken from seeding
bbf92647 104 Float_t fdEdx; // dE/dx
105
106 Double_t fAlpha; // rotation angle
107 Double_t fX; // running local X-coordinate of the track (time bin)
108
b8dc2353 109
110 Double_t fY; // Y-coordinate of the track
111 Double_t fZ; // Z-coordinate of the track
112 Double_t fE; // C*x0
113 Double_t fT; // tangent of the track momentum dip angle
114 Double_t fC; // track curvature
bbf92647 115
116 Double_t fCyy; // covariance
117 Double_t fCzy, fCzz; // matrix
b3a5a838 118 Double_t fCey, fCez, fCee; // of the
119 Double_t fCty, fCtz, fCte, fCtt; // track
120 Double_t fCcy, fCcz, fCce, fCct, fCcc; // parameters
b8dc2353 121
5443e65e 122 UInt_t fIndex[kMAX_CLUSTERS_PER_TRACK]; // global indexes of clusters
123 Float_t fdQdl[kMAX_CLUSTERS_PER_TRACK]; // cluster amplitudes corrected
124 // for track angles
b8dc2353 125
a819a5f7 126 Float_t fLhElectron; // Likelihood to be an electron
9c9d2487 127 Int_t fNWrong; // number of wrong clusters
128 Int_t fNRotate;
bbf92647 129
a819a5f7 130 ClassDef(AliTRDtrack,2) // TRD reconstructed tracks
a2b90f83 131
46d29e70 132};
133
134
46d29e70 135#endif