Added check for ppad[1] range
[u/mrichter/AliRoot.git] / ITS / AliITStrackV2.h
CommitLineData
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
10//-------------------------------------------------------------------------
11
12
13/*****************************************************************************
14 * December 18, 2000 *
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 *****************************************************************************/
26
27#include <AliKalmanTrack.h>
28
29#include "AliITSrecoV2.h"
30
31class AliTPCtrack;
32
33//_____________________________________________________________________________
34class AliITStrackV2 : public AliKalmanTrack {
35public:
36 AliITStrackV2():AliKalmanTrack(){}
37 AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *);
38 AliITStrackV2(const AliITStrackV2& t);
39 Int_t
40 PropagateToVertex(Double_t x0=36.66,Double_t rho=1.2e-3,Double_t pm=0.139);
41 void SetdEdx(Float_t dedx) {fdEdx=dedx;}
42 void SetDetectorIndex(Int_t i) {SetLabel(i);}
43
44 void *operator new(size_t s,void *p) { return p; }
45 void *operator new(size_t s) { return ::operator new(s); }
46
47 Int_t GetDetectorIndex() const {return GetLabel();}
48 Double_t GetX() const {return fX;}
49 Double_t GetAlpha()const {return fAlpha;}
50 Float_t GetdEdx() const {return fdEdx;}
006b5f7f 51 Double_t GetY() const {return fP0;}
52 Double_t GetZ() const {return fP1;}
53 Double_t GetSnp() const {return fP2;}
54 Double_t GetTgl() const {return fP3;}
9b280d80 55 Double_t Get1Pt() const {return fP4*GetConvConst();}
006b5f7f 56 Double_t GetD() const;
006b5f7f 57 Double_t GetSigmaY2() const {return fC00;}
58 Double_t GetSigmaZ2() const {return fC11;}
59
60 Int_t Compare(const TObject *o) const;
61
62 void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
63 void GetExternalCovariance(Double_t cov[15]) const ;
64
65 Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
66 Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
67
68 Int_t Propagate(Double_t alpha,
69 Double_t xr,Double_t x0,Double_t rho,Double_t pm=0.139);
70
71 Double_t GetPredictedChi2(const AliCluster *cluster) const;
72 Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
73
74 Double_t GetPredictedChi2(const AliCluster *cluster, Double_t *m,
75 Double_t x0, Double_t pm=0.139) const;
76 Int_t Update(const Double_t *m, Double_t chi2, UInt_t i);
77 Int_t Improve(Double_t x0,Double_t yv,Double_t zv);
14825d5a 78 void ResetCovariance();
79 void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
006b5f7f 80
81 Int_t Invariant() const;
82
83 //protected:
84Int_t
85PropagateTo(Double_t xr,Double_t x0=21.82,Double_t rho=2.33,Double_t pm=0.139);
86
87private:
88 Double_t fX; // X-coordinate of this track (reference plane)
89 Double_t fAlpha; // rotation angle
90
91 Double_t fdEdx; // dE/dx
92
93 Double_t fP0; // Y-coordinate of a track
94 Double_t fP1; // Z-coordinate of a track
95 Double_t fP2; // sine of the track momentum azimuthal angle
96 Double_t fP3; // tangent of the track momentum dip angle
97 Double_t fP4; // track curvature
98
99 Double_t fC00; // covariance
100 Double_t fC10, fC11; // matrix
101 Double_t fC20, fC21, fC22; // of the
102 Double_t fC30, fC31, fC32, fC33; // track
103 Double_t fC40, fC41, fC42, fC43, fC44; // parameters
104
105 UInt_t fIndex[kMaxLayer]; // indices of associated clusters
106
107 ClassDef(AliITStrackV2,1) //ITS reconstructed track
108};
109
110inline
111void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
112 //---------------------------------------------------------------------
113 // This function return external TPC track representation
114 //---------------------------------------------------------------------
115 xr=fX;
116 x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
117}
118
119#endif
120
121