]>
Commit | Line | Data |
---|---|---|
73042f01 | 1 | #ifndef ALITPCTRACK_H |
2 | #define ALITPCTRACK_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
73042f01 | 6 | //------------------------------------------------------- |
7 | // TPC Track Class | |
8 | // | |
9 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch | |
10 | //------------------------------------------------------- | |
11 | ||
be9c5115 | 12 | /***************************************************************************** |
13 | * December 18, 2000 * | |
14 | * Internal view of the TPC track parametrisation as well as the order of * | |
15 | * track parameters are subject for possible changes ! * | |
16 | * Use GetExternalParameters() and GetExternalCovariance() to access TPC * | |
17 | * track information regardless of its internal representation. * | |
18 | * This formation is now fixed in the following way: * | |
19 | * external param0: local Y-coordinate of a track (cm) * | |
20 | * external param1: local Z-coordinate of a track (cm) * | |
21 | * external param2: local sine of the track momentum azimuth angle * | |
22 | * external param3: tangent of the track momentum dip angle * | |
23 | * external param4: 1/pt (1/(GeV/c)) * | |
24 | *****************************************************************************/ | |
25 | ||
b19a0509 | 26 | #include <AliKalmanTrack.h> |
73042f01 | 27 | #include <TMath.h> |
73042f01 | 28 | |
29 | class AliTPCClustersArray; | |
30 | class AliTPCcluster; | |
31 | ||
32 | //_____________________________________________________________________________ | |
b19a0509 | 33 | class AliTPCtrack : public AliKalmanTrack { |
73042f01 | 34 | public: |
b19a0509 | 35 | AliTPCtrack():AliKalmanTrack(){} |
36 | AliTPCtrack(UInt_t index, const Double_t xx[5], | |
37 | const Double_t cc[15], Double_t xr, Double_t alpha); | |
38 | AliTPCtrack(const AliTPCtrack& t); | |
39 | Int_t PropagateToVertex( | |
40 | Double_t x0=36.66,Double_t rho=1.2e-3,Double_t pm=0.139); | |
41 | Int_t Rotate(Double_t angle); | |
42 | void CookLabel(AliTPCClustersArray *carray); | |
43 | void SetdEdx(Float_t dedx) {fdEdx=dedx;} | |
44 | ||
be9c5115 | 45 | Double_t GetX() const {return fX;} |
46 | Double_t GetAlpha() const {return fAlpha;} | |
47 | Double_t GetdEdx() const {return fdEdx;} | |
48 | ||
b19a0509 | 49 | Double_t GetY() const {return fP0;} |
50 | Double_t GetZ() const {return fP1;} | |
be9c5115 | 51 | Double_t GetSnp() const {return fX*fP3 - fP2;} |
9b280d80 | 52 | Double_t Get1Pt() const {return fP3*GetConvConst();} |
b19a0509 | 53 | Double_t GetTgl() const {return fP4;} |
be9c5115 | 54 | |
b19a0509 | 55 | Double_t GetSigmaY2() const {return fC00;} |
56 | Double_t GetSigmaZ2() const {return fC11;} | |
be9c5115 | 57 | |
58 | Int_t Compare(const TObject *o) const; | |
59 | ||
60 | void GetExternalParameters(Double_t& xr, Double_t x[5]) const ; | |
61 | void GetExternalCovariance(Double_t cov[15]) const ; | |
62 | ||
63 | //******** To be removed next release !!! ************** | |
64 | Double_t GetEta() const {return fP2;} | |
65 | Double_t GetC() const {return fP3;} | |
66 | void GetCovariance(Double_t cc[15]) const { | |
67 | cc[0 ]=fC00; | |
68 | cc[1 ]=fC10; cc[2 ]=fC11; | |
69 | cc[3 ]=fC20; cc[4 ]=fC21; cc[5 ]=fC22; | |
70 | cc[6 ]=fC30; cc[7 ]=fC31; cc[8 ]=fC32; cc[9 ]=fC33; | |
71 | cc[10]=fC40; cc[11]=fC41; cc[12]=fC42; cc[13]=fC43; cc[14]=fC44; | |
72 | } | |
73 | //****************************************************** | |
74 | ||
b19a0509 | 75 | void GetCluster(Int_t i, Int_t &sec, Int_t &row, Int_t &ncl) const; |
76 | ||
be9c5115 | 77 | virtual Double_t GetPredictedChi2(const AliCluster *cluster) const; |
b19a0509 | 78 | Int_t PropagateTo(Double_t xr, |
79 | Double_t x0=28.94,Double_t rho=0.9e-3,Double_t pm=0.139); | |
be9c5115 | 80 | Int_t Update(const AliCluster* c, Double_t chi2, UInt_t i); |
73042f01 | 81 | |
be9c5115 | 82 | private: |
83 | Double_t fX; // X-coordinate of this track (reference plane) | |
84 | Double_t fAlpha; // Rotation angle the local (TPC sector) | |
85 | // coordinate system and the global ALICE one. | |
73042f01 | 86 | |
be9c5115 | 87 | Double_t fdEdx; // dE/dx |
73042f01 | 88 | |
be9c5115 | 89 | Double_t fP0; // Y-coordinate of a track |
90 | Double_t fP1; // Z-coordinate of a track | |
91 | Double_t fP2; // C*x0 | |
92 | Double_t fP3; // track curvature | |
93 | Double_t fP4; // tangent of the track momentum dip angle | |
94 | ||
95 | Double_t fC00; // covariance | |
96 | Double_t fC10, fC11; // matrix | |
97 | Double_t fC20, fC21, fC22; // of the | |
98 | Double_t fC30, fC31, fC32, fC33; // track | |
99 | Double_t fC40, fC41, fC42, fC43, fC44; // parameters | |
100 | ||
101 | UInt_t fIndex[200]; // indices of associated clusters | |
73042f01 | 102 | |
b19a0509 | 103 | ClassDef(AliTPCtrack,1) // Time Projection Chamber reconstructed tracks |
73042f01 | 104 | }; |
105 | ||
73042f01 | 106 | |
107 | inline | |
108 | void AliTPCtrack::GetCluster(Int_t i,Int_t &sec,Int_t &row,Int_t &ncl) const { | |
b19a0509 | 109 | //return sector, pad row and the index of the i-th cluster of this track |
73042f01 | 110 | Int_t index=fIndex[i]; |
111 | sec=(index&0xff000000)>>24; | |
112 | row=(index&0x00ff0000)>>16; | |
113 | ncl=(index&0x0000ffff)>>00; | |
114 | } | |
115 | ||
be9c5115 | 116 | inline |
117 | void AliTPCtrack::GetExternalParameters(Double_t& xr, Double_t x[5]) const { | |
118 | //--------------------------------------------------------------------- | |
119 | // This function return external TPC track representation | |
120 | //--------------------------------------------------------------------- | |
121 | xr=fX; | |
122 | x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt(); | |
123 | } | |
124 | ||
73042f01 | 125 | #endif |
126 | ||
127 |