1 #ifndef ALITPCTRACKER_H
2 #define ALITPCTRACKER_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 //-------------------------------------------------------
11 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
12 //-------------------------------------------------------
13 #include "AliTracker.h"
14 #include "AliTPCtrack.h"
15 #include "AliTPCreco.h"
16 #include "AliTPCcluster.h"
26 class AliTPCtracker : public AliTracker {
28 AliTPCtracker():AliTracker(),fkNIS(0),fkNOS(0) {
29 fInnerSec=fOuterSec=0; fSeeds=0;
32 AliTPCtracker(const AliTPCParam *par);
35 Int_t ReadSeeds(const TFile *in);
37 Int_t LoadClusters(TTree *c);
38 void UnloadClusters();
40 AliCluster *GetCluster(Int_t index) const;
41 Int_t Clusters2Tracks(AliESD *event);
42 Int_t PropagateBack(AliESD *event);
43 Int_t RefitInward(AliESD *event);
45 virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
48 //**************** Internal tracker class **********************
53 fSize=kMaxClusterPerRow/8;
54 fClusterArray=new AliTPCcluster[fSize];
56 ~AliTPCRow() {delete[] fClusterArray;}
57 void InsertCluster(const AliTPCcluster *c, Int_t sec, Int_t row);
58 void ResetClusters() {fN=0; delete[] fClusterArray; fClusterArray=0;}
59 operator int() const {return fN;}
60 const AliTPCcluster *operator[](Int_t i) const {return fClusters[i];}
61 const AliTPCcluster *GetUnsortedCluster(Int_t i) const {
62 if ((i < 0) || (i >= fN)) return NULL;
63 return fClusterArray+i;
65 UInt_t GetIndex(Int_t i) const {return fIndex[i];}
66 Int_t Find(Double_t y) const;
67 void SetX(Double_t x) {fX=x;}
68 Double_t GetX() const {return fX;}
71 Int_t fN; //number of clusters
72 const AliTPCcluster *fClusters[kMaxClusterPerRow]; //pointers to clusters
73 Int_t fSize; //size of array of clusters
74 AliTPCcluster *fClusterArray; //array of clusters
75 UInt_t fIndex[kMaxClusterPerRow]; //indeces of clusters
76 Double_t fX; //X-coordinate of this row
79 AliTPCRow(const AliTPCRow& r); //dummy copy constructor
80 AliTPCRow &operator=(const AliTPCRow& r); //dummy assignment operator
83 //**************** Internal tracker class **********************
86 AliTPCSector() { fN=0; fRow = 0; }
87 ~AliTPCSector() { delete[] fRow; }
88 AliTPCRow& operator[](Int_t i) const { return *(fRow+i); }
89 Int_t GetNRows() const { return fN; }
90 void Setup(const AliTPCParam *par, Int_t flag);
91 Double_t GetX(Int_t l) const {return fRow[l].GetX();}
92 Double_t GetMaxY(Int_t l) const {
93 return GetX(l)*TMath::Tan(0.5*GetAlpha());
95 Double_t GetAlpha() const {return fAlpha;}
96 Double_t GetAlphaShift() const {return fAlphaShift;}
97 Int_t GetRowNumber(Double_t x) const {
98 //return pad row number for this x
102 if (x > r) return fN;
104 if (x < r) return -1;
105 return Int_t((x-r)/f1PadPitchLength + 0.5);}
108 if (x > r) return fN;
110 if (x < r) return -1;
111 Double_t r1=fRow[64].GetX();
113 return Int_t((x-r)/f1PadPitchLength + 0.5);}
115 return (Int_t((x-r1)/f2PadPitchLength + 0.5)+64);}
118 Double_t GetPadPitchWidth() const {return fPadPitchWidth;}
121 Int_t fN; //number of pad rows
122 AliTPCRow *fRow; //array of pad rows
123 Double_t fAlpha; //opening angle
124 Double_t fAlphaShift; //shift angle;
125 Double_t fPadPitchWidth; //pad pitch width
126 Double_t f1PadPitchLength; //pad pitch length
127 Double_t f2PadPitchLength; //pad pitch length
129 AliTPCSector(const AliTPCSector &s); //dummy copy contructor
130 AliTPCSector& operator=(const AliTPCSector &s);//dummy assignment operator
133 //**************** Internal tracker class **********************
134 class AliTPCseed : public AliTPCtrack {
136 AliTPCseed():AliTPCtrack(){}
137 AliTPCseed(const AliTPCtrack &t):AliTPCtrack(t){}
138 AliTPCseed(UInt_t index, const Double_t xx[5],
139 const Double_t cc[15], Double_t xr, Double_t alpha):
140 AliTPCtrack(index, xx, cc, xr, alpha) {}
141 void SetSampledEdx(Float_t q, Int_t i) {
142 Double_t s=GetSnp(), t=GetTgl();
143 q *= TMath::Sqrt((1-s*s)/(1+t*t));
146 void CookdEdx(Double_t low=0.05, Double_t up=0.70);
149 Float_t fdEdxSample[200]; //array of dE/dx samples
154 void MakeSeeds(Int_t i1, Int_t i2);
155 Int_t FollowProlongation(AliTPCseed& t, Int_t rf=0);
156 Int_t FollowBackProlongation(AliTPCseed &s, const AliTPCtrack &t);
157 Int_t FollowRefitInward(AliTPCseed *seed, AliTPCtrack *track);
159 AliTPCtracker(const AliTPCtracker& r); //dummy copy constructor
160 AliTPCtracker &operator=(const AliTPCtracker& r);//dummy assignment operator
162 const Int_t fkNIS; //number of inner sectors
163 AliTPCSector *fInnerSec; //array of inner sectors
164 const Int_t fkNOS; //number of outer sectors
165 AliTPCSector *fOuterSec; //array of outer sectors
167 Int_t fN; //number of "active" sectors
168 AliTPCSector *fSectors; //pointer to "active" sectors;
170 AliTPCParam *fParam; //! TPC parameters for outer reference plane [SR, GSI, 18.02.2003]
171 TObjArray *fSeeds; //array of track seeds
173 ClassDef(AliTPCtracker,2) // Time Projection Chamber tracker