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 */
6 //-------------------------------------------------------------------------
9 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
10 //-------------------------------------------------------------------------
13 /*****************************************************************************
15 * Internal view of the ITS track parametrisation as well as the order of *
16 * track parameters are subject for possible changes ! *
17 * Use GetExternalParameters() and GetExternalCovariance() to access ITS *
18 * track information regardless of its internal representation. *
19 * This formation is now fixed in the following way: *
20 * external param0: local Y-coordinate of a track (cm) *
21 * external param1: local Z-coordinate of a track (cm) *
22 * external param2: local sine of the track momentum azimuthal angle *
23 * external param3: tangent of the track momentum dip angle *
24 * external param4: 1/pt (1/(GeV/c)) *
25 *****************************************************************************/
27 #include <AliKalmanTrack.h>
29 #include "AliITSrecoV2.h"
33 //_____________________________________________________________________________
34 class AliITStrackV2 : public AliKalmanTrack {
36 AliITStrackV2():AliKalmanTrack(){}
37 AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *);
38 AliITStrackV2(const AliITStrackV2& t);
39 Int_t PropagateToVertex(Double_t x0=36.66,Double_t rho=1.2e-3);
40 Int_t Propagate(Double_t alpha, Double_t xr, Double_t x0, Double_t rho);
41 Int_t PropagateTo(Double_t xr,Double_t x0=21.82,Double_t rho=2.33);
42 Int_t Update(const Double_t *m, Double_t chi2, UInt_t i);
43 Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
44 Int_t Improve(Double_t x0,Double_t yv,Double_t zv);
45 void SetdEdx(Double_t dedx) {fdEdx=dedx;}
46 void CookdEdx(Double_t low=0., Double_t up=1.) {}
47 void SetDetectorIndex(Int_t i) {SetLabel(i);}
48 void ResetCovariance();
49 void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
51 void *operator new(size_t s,void *p) { return p; }
52 void *operator new(size_t s) { return ::operator new(s); }
54 Int_t GetDetectorIndex() const {return GetLabel();}
55 Double_t GetX() const {return fX;}
56 Double_t GetAlpha()const {return fAlpha;}
57 Double_t GetdEdx() const {return fdEdx;}
58 Double_t GetY() const {return fP0;}
59 Double_t GetZ() const {return fP1;}
60 Double_t GetSnp() const {return fP2;}
61 Double_t GetTgl() const {return fP3;}
62 Double_t Get1Pt() const {return fP4*GetConvConst();}
63 Double_t GetD() const;
64 Double_t GetSigmaY2() const {return fC00;}
65 Double_t GetSigmaZ2() const {return fC11;}
66 Int_t Compare(const TObject *o) const;
67 void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
68 void GetExternalCovariance(Double_t cov[15]) const ;
69 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
70 Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
71 Double_t GetPredictedChi2(const AliCluster *cluster) const;
73 GetPredictedChi2(const AliCluster *cluster, Double_t *m, Double_t x0) const;
74 Int_t Invariant() const;
77 Double_t fX; // X-coordinate of this track (reference plane)
78 Double_t fAlpha; // rotation angle
80 Double_t fdEdx; // dE/dx
82 Double_t fP0; // Y-coordinate of a track
83 Double_t fP1; // Z-coordinate of a track
84 Double_t fP2; // sine of the track momentum azimuthal angle
85 Double_t fP3; // tangent of the track momentum dip angle
86 Double_t fP4; // track curvature
88 Double_t fC00; // covariance
89 Double_t fC10, fC11; // matrix
90 Double_t fC20, fC21, fC22; // of the
91 Double_t fC30, fC31, fC32, fC33; // track
92 Double_t fC40, fC41, fC42, fC43, fC44; // parameters
94 UInt_t fIndex[kMaxLayer]; // indices of associated clusters
96 ClassDef(AliITStrackV2,1) //ITS reconstructed track
100 void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
101 //---------------------------------------------------------------------
102 // This function return external TPC track representation
103 //---------------------------------------------------------------------
105 x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();