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"
22 class AliTPCtracker : public AliTracker {
24 AliTPCtracker():AliTracker(),fkNIS(0),fkNOS(0) {
25 fInnerSec=fOuterSec=0; fSeeds=0;
28 AliTPCtracker(const AliTPCParam *par);
31 Int_t ReadSeeds(const TFile *in);
34 void UnloadClusters();
36 AliCluster *GetCluster(Int_t index) const;
37 Int_t Clusters2Tracks(const TFile *in, TFile *out);
38 Int_t PropagateBack(const TFile *in, TFile *out);
39 Int_t PropagateBack(const TFile *in, const TFile *in2, TFile *out);
40 Int_t RefitInward(TFile *outTracks, TFile *inTracks);
42 virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
45 //**************** Internal tracker class **********************
50 fSize=kMaxClusterPerRow/8;
51 fClusterArray=new AliTPCcluster[fSize];
53 ~AliTPCRow() {delete[] fClusterArray;}
54 void InsertCluster(const AliTPCcluster *c, Int_t sec, Int_t row);
55 void ResetClusters() {fN=0;}
56 operator int() const {return fN;}
57 const AliTPCcluster *operator[](Int_t i) const {return fClusters[i];}
58 const AliTPCcluster *GetUnsortedCluster(Int_t i) const {
59 return fClusterArray+i;
61 UInt_t GetIndex(Int_t i) const {return fIndex[i];}
62 Int_t Find(Double_t y) const;
63 void SetX(Double_t x) {fX=x;}
64 Double_t GetX() const {return fX;}
67 Int_t fN; //number of clusters
68 const AliTPCcluster *fClusters[kMaxClusterPerRow]; //pointers to clusters
69 Int_t fSize; //size of array of clusters
70 AliTPCcluster *fClusterArray; //array of clusters
71 UInt_t fIndex[kMaxClusterPerRow]; //indeces of clusters
72 Double_t fX; //X-coordinate of this row
75 AliTPCRow(const AliTPCRow& r); //dummy copy constructor
76 AliTPCRow &operator=(const AliTPCRow& r); //dummy assignment operator
79 //**************** Internal tracker class **********************
82 AliTPCSector() { fN=0; fRow = 0; }
83 ~AliTPCSector() { delete[] fRow; }
84 AliTPCRow& operator[](Int_t i) const { return *(fRow+i); }
85 Int_t GetNRows() const { return fN; }
86 void Setup(const AliTPCParam *par, Int_t flag);
87 Double_t GetX(Int_t l) const {return fRow[l].GetX();}
88 Double_t GetMaxY(Int_t l) const {
89 return GetX(l)*TMath::Tan(0.5*GetAlpha());
91 Double_t GetAlpha() const {return fAlpha;}
92 Double_t GetAlphaShift() const {return fAlphaShift;}
93 Int_t GetRowNumber(Double_t x) const {
94 //return pad row number for this x
100 if (x < r) return -1;
101 return Int_t((x-r)/f1PadPitchLength + 0.5);}
104 if (x > r) return fN;
106 if (x < r) return -1;
107 Double_t r1=fRow[64].GetX();
109 return Int_t((x-r)/f1PadPitchLength + 0.5);}
111 return (Int_t((x-r1)/f2PadPitchLength + 0.5)+64);}
114 Double_t GetPadPitchWidth() const {return fPadPitchWidth;}
117 Int_t fN; //number of pad rows
118 AliTPCRow *fRow; //array of pad rows
119 Double_t fAlpha; //opening angle
120 Double_t fAlphaShift; //shift angle;
121 Double_t fPadPitchWidth; //pad pitch width
122 Double_t f1PadPitchLength; //pad pitch length
123 Double_t f2PadPitchLength; //pad pitch length
125 AliTPCSector(const AliTPCSector &s); //dummy copy contructor
126 AliTPCSector& operator=(const AliTPCSector &s);//dummy assignment operator
129 //**************** Internal tracker class **********************
130 class AliTPCseed : public AliTPCtrack {
132 AliTPCseed():AliTPCtrack(){}
133 AliTPCseed(const AliTPCtrack &t):AliTPCtrack(t){}
134 AliTPCseed(const AliKalmanTrack &t, Double_t a):AliTPCtrack(t,a){}
135 AliTPCseed(UInt_t index, const Double_t xx[5],
136 const Double_t cc[15], Double_t xr, Double_t alpha):
137 AliTPCtrack(index, xx, cc, xr, alpha) {}
138 void SetSampledEdx(Float_t q, Int_t i) {
139 Double_t s=GetSnp(), t=GetTgl();
140 q *= TMath::Sqrt((1-s*s)/(1+t*t));
143 void CookdEdx(Double_t low=0.05, Double_t up=0.70);
146 Float_t fdEdxSample[200]; //array of dE/dx samples
151 void MakeSeeds(Int_t i1, Int_t i2);
152 Int_t FollowProlongation(AliTPCseed& t, Int_t rf=0);
153 Int_t FollowBackProlongation(AliTPCseed &s, const AliTPCtrack &t);
154 Int_t FollowRefitInward(AliTPCseed *seed, AliTPCtrack *track);
156 AliTPCtracker(const AliTPCtracker& r); //dummy copy constructor
157 AliTPCtracker &operator=(const AliTPCtracker& r);//dummy assignment operator
159 const Int_t fkNIS; //number of inner sectors
160 AliTPCSector *fInnerSec; //array of inner sectors
161 const Int_t fkNOS; //number of outer sectors
162 AliTPCSector *fOuterSec; //array of outer sectors
164 Int_t fN; //number of "active" sectors
165 AliTPCSector *fSectors; //pointer to "active" sectors;
167 AliTPCParam *fParam; //! TPC parameters for outer reference plane [SR, GSI, 18.02.2003]
168 TObjArray *fSeeds; //array of track seeds