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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 | // dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
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 | ||
32 | class AliTPCtrack; | |
33 | ||
34 | //_____________________________________________________________________________ | |
35 | class AliITStrackV2 : public AliKalmanTrack { | |
36 | public: | |
37 | AliITStrackV2():AliKalmanTrack(){} | |
38 | AliITStrackV2(const AliTPCtrack& t) throw (const Char_t *); | |
39 | AliITStrackV2(const AliITStrackV2& t); | |
40 | Int_t PropagateToVertex(Double_t d=1.2e-3*3., Double_t x0=36.66); | |
41 | Int_t Propagate(Double_t alpha, Double_t xr); | |
42 | Int_t CorrectForMaterial(Double_t d, Double_t x0=21.82); | |
43 | Int_t PropagateTo(Double_t xr, Double_t d, Double_t x0=21.82); | |
44 | Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i); | |
45 | Int_t Improve(Double_t x0,Double_t yv,Double_t zv); | |
46 | void SetdEdx(Double_t dedx) {fdEdx=dedx;} | |
47 | void SetSampledEdx(Float_t q, Int_t i); | |
48 | void CookdEdx(Double_t low=0., Double_t up=0.51); | |
49 | void SetDetectorIndex(Int_t i) {SetLabel(i);} | |
50 | void ResetCovariance(); | |
51 | void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); } | |
52 | ||
53 | void *operator new(size_t s,void *p) { return p; } | |
54 | void *operator new(size_t s) { return ::operator new(s); } | |
55 | ||
56 | Int_t GetDetectorIndex() const {return GetLabel();} | |
57 | Double_t GetX() const {return fX;} | |
58 | Double_t GetAlpha()const {return fAlpha;} | |
59 | Double_t GetdEdx() const {return fdEdx;} | |
60 | Double_t GetY() const {return fP0;} | |
61 | Double_t GetZ() const {return fP1;} | |
62 | Double_t GetSnp() const {return fP2;} | |
63 | Double_t GetTgl() const {return fP3;} | |
64 | Double_t Get1Pt() const {return fP4*GetConvConst();} | |
65 | Double_t GetD() const; | |
66 | Double_t GetSigmaY2() const {return fC00;} | |
67 | Double_t GetSigmaZ2() const {return fC11;} | |
68 | Int_t Compare(const TObject *o) const; | |
69 | void GetExternalParameters(Double_t& xr, Double_t x[5]) const ; | |
70 | void GetExternalCovariance(Double_t cov[15]) const ; | |
71 | Int_t GetClusterIndex(Int_t i) const {return fIndex[i];} | |
72 | Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const; | |
73 | Double_t GetPredictedChi2(const AliCluster *cluster) const; | |
74 | Double_t | |
75 | GetPredictedChi2(const AliCluster *cluster, Double_t *m, Double_t x0) const; | |
76 | Int_t Invariant() const; | |
77 | ||
78 | private: | |
79 | Double_t fX; // X-coordinate of this track (reference plane) | |
80 | Double_t fAlpha; // rotation angle | |
81 | ||
82 | Double_t fdEdx; // dE/dx | |
83 | ||
84 | Double_t fP0; // Y-coordinate of a track | |
85 | Double_t fP1; // Z-coordinate of a track | |
86 | Double_t fP2; // sine of the track momentum azimuthal angle | |
87 | Double_t fP3; // tangent of the track momentum dip angle | |
88 | Double_t fP4; // track curvature | |
89 | ||
90 | Double_t fC00; // covariance | |
91 | Double_t fC10, fC11; // matrix | |
92 | Double_t fC20, fC21, fC22; // of the | |
93 | Double_t fC30, fC31, fC32, fC33; // track | |
94 | Double_t fC40, fC41, fC42, fC43, fC44; // parameters | |
95 | ||
96 | UInt_t fIndex[kMaxLayer]; // indices of associated clusters | |
97 | ||
98 | Float_t fdEdxSample[4]; // array of dE/dx samples b.b. | |
99 | ||
100 | ClassDef(AliITStrackV2,1) //ITS reconstructed track | |
101 | }; | |
102 | ||
103 | inline | |
104 | void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const { | |
105 | //--------------------------------------------------------------------- | |
106 | // This function return external TPC track representation | |
107 | //--------------------------------------------------------------------- | |
108 | xr=fX; | |
109 | x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt(); | |
110 | } | |
111 | ||
112 | inline | |
113 | void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) { | |
114 | //---------------------------------------------------------------------- | |
115 | // This function stores dEdx sample corrected for the track segment length | |
116 | // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch | |
117 | //---------------------------------------------------------------------- | |
118 | if (i<0) return; | |
119 | if (i>3) return; | |
120 | Double_t s=GetSnp(), t=GetTgl(); | |
121 | q *= TMath::Sqrt((1-s*s)/(1+t*t)); | |
122 | fdEdxSample[i]=q; | |
123 | } | |
124 | #endif | |
125 | ||
126 |