Update raw2digits framework (Ch.Finck)
[u/mrichter/AliRoot.git] / ITS / AliITStrackV2.h
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006b5f7f 1#ifndef ALIITSTRACKV2_H
2#define ALIITSTRACKV2_H
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6//-------------------------------------------------------------------------
7// ITS Track Class
8//
9// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
a9a2d814 10// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
006b5f7f 11//-------------------------------------------------------------------------
12
13
14/*****************************************************************************
15 * December 18, 2000 *
16 * Internal view of the ITS track parametrisation as well as the order of *
17 * track parameters are subject for possible changes ! *
18 * Use GetExternalParameters() and GetExternalCovariance() to access ITS *
19 * track information regardless of its internal representation. *
20 * This formation is now fixed in the following way: *
21 * external param0: local Y-coordinate of a track (cm) *
22 * external param1: local Z-coordinate of a track (cm) *
23 * external param2: local sine of the track momentum azimuthal angle *
24 * external param3: tangent of the track momentum dip angle *
25 * external param4: 1/pt (1/(GeV/c)) *
26 *****************************************************************************/
27
28#include <AliKalmanTrack.h>
29
30#include "AliITSrecoV2.h"
31
83d73500 32class AliESDtrack;
006b5f7f 33
34//_____________________________________________________________________________
8676d691 35class AliITStrackV2 : public AliKalmanTrack {
006b5f7f 36public:
22b13da0 37 AliITStrackV2();
67c3dcbe 38 AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *);
006b5f7f 39 AliITStrackV2(const AliITStrackV2& t);
880f41b9 40 Int_t PropagateToVertex(Double_t d=0., Double_t x0=0.);
a9a2d814 41 Int_t Propagate(Double_t alpha, Double_t xr);
15dd636f 42 virtual Int_t CorrectForMaterial(Double_t d, Double_t x0=21.82);
a9a2d814 43 Int_t PropagateTo(Double_t xr, Double_t d, Double_t x0=21.82);
7f6ddf58 44 Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
8676d691 45 Int_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
7f6ddf58 46 void SetdEdx(Double_t dedx) {fdEdx=dedx;}
a9a2d814 47 void SetSampledEdx(Float_t q, Int_t i);
48 void CookdEdx(Double_t low=0., Double_t up=0.51);
006b5f7f 49 void SetDetectorIndex(Int_t i) {SetLabel(i);}
7f6ddf58 50 void ResetCovariance();
51 void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
15dd636f 52 void UpdateESDtrack(ULong_t flags) const;
53 void SetConstrainedESDtrack(Double_t chi2) const;
e43c066c 54
1aedd96e 55 AliESDtrack *GetESDtrack() const {return fESDtrack;}
e43c066c 56
006b5f7f 57 Int_t GetDetectorIndex() const {return GetLabel();}
58 Double_t GetX() const {return fX;}
59 Double_t GetAlpha()const {return fAlpha;}
7f6ddf58 60 Double_t GetdEdx() const {return fdEdx;}
83d73500 61 Double_t GetPIDsignal() const {return GetdEdx();}
006b5f7f 62 Double_t GetY() const {return fP0;}
63 Double_t GetZ() const {return fP1;}
64 Double_t GetSnp() const {return fP2;}
65 Double_t GetTgl() const {return fP3;}
67c3dcbe 66 Double_t GetC() const {return fP4;}
77f353c4 67 Double_t
68 Get1Pt() const { return (1e-9*TMath::Abs(fP4)/fP4 + fP4)*GetConvConst(); }
a6a6f799 69 Double_t GetD(Double_t x=0, Double_t y=0) const;
babd135a 70 Double_t GetZat(Double_t x=0) const;
71
006b5f7f 72 Double_t GetSigmaY2() const {return fC00;}
73 Double_t GetSigmaZ2() const {return fC11;}
006b5f7f 74 Int_t Compare(const TObject *o) const;
006b5f7f 75 void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
76 void GetExternalCovariance(Double_t cov[15]) const ;
006b5f7f 77 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
78 Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
006b5f7f 79 Double_t GetPredictedChi2(const AliCluster *cluster) const;
15dd636f 80 Int_t Invariant() const;
006b5f7f 81
235b705f 82protected:
006b5f7f 83 Double_t fX; // X-coordinate of this track (reference plane)
84 Double_t fAlpha; // rotation angle
85
86 Double_t fdEdx; // dE/dx
87
88 Double_t fP0; // Y-coordinate of a track
89 Double_t fP1; // Z-coordinate of a track
90 Double_t fP2; // sine of the track momentum azimuthal angle
91 Double_t fP3; // tangent of the track momentum dip angle
92 Double_t fP4; // track curvature
93
94 Double_t fC00; // covariance
95 Double_t fC10, fC11; // matrix
96 Double_t fC20, fC21, fC22; // of the
97 Double_t fC30, fC31, fC32, fC33; // track
98 Double_t fC40, fC41, fC42, fC43, fC44; // parameters
15dd636f 99
006b5f7f 100 UInt_t fIndex[kMaxLayer]; // indices of associated clusters
a9a2d814 101 Float_t fdEdxSample[4]; // array of dE/dx samples b.b.
15dd636f 102
83d73500 103 AliESDtrack *fESDtrack; //! pointer to the connected ESD track
15dd636f 104 ClassDef(AliITStrackV2,4) //ITS reconstructed track
006b5f7f 105};
106
107inline
108void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
109 //---------------------------------------------------------------------
83d73500 110 // This function return external ITS track representation
006b5f7f 111 //---------------------------------------------------------------------
112 xr=fX;
113 x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
114}
a9a2d814 115
23efe5f1 116inline
117void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
118 //----------------------------------------------------------------------
a9a2d814 119 // This function stores dEdx sample corrected for the track segment length
120 // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
23efe5f1 121 //----------------------------------------------------------------------
a9a2d814 122 if (i<0) return;
123 if (i>3) return;
23efe5f1 124 Double_t s=GetSnp(), t=GetTgl();
23efe5f1 125 q *= TMath::Sqrt((1-s*s)/(1+t*t));
126 fdEdxSample[i]=q;
23efe5f1 127}
006b5f7f 128#endif
129
130