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"
17 #include "AliBarrelTrack.h"
27 class AliTPCtracker : public AliTracker {
29 AliTPCtracker():AliTracker(),fkNIS(0),fkNOS(0) {
30 fInnerSec=fOuterSec=0; fSeeds=0;
33 AliTPCtracker(const AliTPCParam *par);
36 Int_t ReadSeeds(const TFile *in);
38 Int_t LoadClusters(TTree *c);
39 void UnloadClusters();
41 AliCluster *GetCluster(Int_t index) const;
42 Int_t Clusters2Tracks(TTree *in, TTree *out);
43 Int_t Clusters2Tracks(AliESD *event);
44 Int_t PropagateBack(TTree *in, TTree *out);
45 Int_t PropagateBack(AliESD *event);
46 Int_t RefitInward(TTree *inTracks, TTree *outTracks);
47 Int_t RefitInward(AliESD *event);
49 virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
52 //**************** Internal tracker class **********************
57 fSize=kMaxClusterPerRow/8;
58 fClusterArray=new AliTPCcluster[fSize];
60 ~AliTPCRow() {delete[] fClusterArray;}
61 void InsertCluster(const AliTPCcluster *c, Int_t sec, Int_t row);
62 void ResetClusters() {fN=0; delete[] fClusterArray; fClusterArray=0;}
63 operator int() const {return fN;}
64 const AliTPCcluster *operator[](Int_t i) const {return fClusters[i];}
65 const AliTPCcluster *GetUnsortedCluster(Int_t i) const {
66 if ((i < 0) || (i >= fN)) return NULL;
67 return fClusterArray+i;
69 UInt_t GetIndex(Int_t i) const {return fIndex[i];}
70 Int_t Find(Double_t y) const;
71 void SetX(Double_t x) {fX=x;}
72 Double_t GetX() const {return fX;}
75 Int_t fN; //number of clusters
76 const AliTPCcluster *fClusters[kMaxClusterPerRow]; //pointers to clusters
77 Int_t fSize; //size of array of clusters
78 AliTPCcluster *fClusterArray; //array of clusters
79 UInt_t fIndex[kMaxClusterPerRow]; //indeces of clusters
80 Double_t fX; //X-coordinate of this row
83 AliTPCRow(const AliTPCRow& r); //dummy copy constructor
84 AliTPCRow &operator=(const AliTPCRow& r); //dummy assignment operator
87 //**************** Internal tracker class **********************
90 AliTPCSector() { fN=0; fRow = 0; }
91 ~AliTPCSector() { delete[] fRow; }
92 AliTPCRow& operator[](Int_t i) const { return *(fRow+i); }
93 Int_t GetNRows() const { return fN; }
94 void Setup(const AliTPCParam *par, Int_t flag);
95 Double_t GetX(Int_t l) const {return fRow[l].GetX();}
96 Double_t GetMaxY(Int_t l) const {
97 return GetX(l)*TMath::Tan(0.5*GetAlpha());
99 Double_t GetAlpha() const {return fAlpha;}
100 Double_t GetAlphaShift() const {return fAlphaShift;}
101 Int_t GetRowNumber(Double_t x) const {
102 //return pad row number for this x
106 if (x > r) return fN;
108 if (x < r) return -1;
109 return Int_t((x-r)/f1PadPitchLength + 0.5);}
112 if (x > r) return fN;
114 if (x < r) return -1;
115 Double_t r1=fRow[64].GetX();
117 return Int_t((x-r)/f1PadPitchLength + 0.5);}
119 return (Int_t((x-r1)/f2PadPitchLength + 0.5)+64);}
122 Double_t GetPadPitchWidth() const {return fPadPitchWidth;}
125 Int_t fN; //number of pad rows
126 AliTPCRow *fRow; //array of pad rows
127 Double_t fAlpha; //opening angle
128 Double_t fAlphaShift; //shift angle;
129 Double_t fPadPitchWidth; //pad pitch width
130 Double_t f1PadPitchLength; //pad pitch length
131 Double_t f2PadPitchLength; //pad pitch length
133 AliTPCSector(const AliTPCSector &s); //dummy copy contructor
134 AliTPCSector& operator=(const AliTPCSector &s);//dummy assignment operator
137 //**************** Internal tracker class **********************
138 class AliTPCseed : public AliTPCtrack {
140 AliTPCseed():AliTPCtrack(){}
141 AliTPCseed(const AliTPCtrack &t):AliTPCtrack(t){}
142 AliTPCseed(const AliKalmanTrack &t, Double_t a):AliTPCtrack(t,a){}
143 AliTPCseed(UInt_t index, const Double_t xx[5],
144 const Double_t cc[15], Double_t xr, Double_t alpha):
145 AliTPCtrack(index, xx, cc, xr, alpha) {}
146 void SetSampledEdx(Float_t q, Int_t i) {
147 Double_t s=GetSnp(), t=GetTgl();
148 q *= TMath::Sqrt((1-s*s)/(1+t*t));
151 void CookdEdx(Double_t low=0.05, Double_t up=0.70);
154 Float_t fdEdxSample[200]; //array of dE/dx samples
159 void MakeSeeds(Int_t i1, Int_t i2);
160 Int_t FollowProlongation(AliTPCseed& t, Int_t rf=0);
161 Int_t FollowBackProlongation(AliTPCseed &s, const AliTPCtrack &t);
162 Int_t FollowRefitInward(AliTPCseed *seed, AliTPCtrack *track);
164 AliTPCtracker(const AliTPCtracker& r); //dummy copy constructor
165 AliTPCtracker &operator=(const AliTPCtracker& r);//dummy assignment operator
167 const Int_t fkNIS; //number of inner sectors
168 AliTPCSector *fInnerSec; //array of inner sectors
169 const Int_t fkNOS; //number of outer sectors
170 AliTPCSector *fOuterSec; //array of outer sectors
172 Int_t fN; //number of "active" sectors
173 AliTPCSector *fSectors; //pointer to "active" sectors;
175 AliTPCParam *fParam; //! TPC parameters for outer reference plane [SR, GSI, 18.02.2003]
176 TObjArray *fSeeds; //array of track seeds
179 void SetBarrelTree(const char *mode);
180 void StoreBarrelTrack(AliTPCtrack *ps, Int_t refPlane, Int_t isIn);
183 TFile *fBarrelFile; // file with "barrel" tracks
184 TTree *fBarrelTree; // tree with "barrel" tracks
185 TBranch *fBarrelBranch;
186 TClonesArray *fBarrelArray;
187 AliBarrelTrack *fBarrelTrack;
189 ClassDef(AliTPCtracker,1) // Time Projection Chamber tracker