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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 */ | |
5 | ||
6 | /* $Id$ */ | |
7 | ||
8 | //------------------------------------------------------- | |
9 | // TPC tracker | |
10 | // | |
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 | ||
18 | class TFile; | |
19 | class TTree; | |
20 | class TBranch; | |
21 | class AliTPCParam; | |
22 | class TObjArray; | |
23 | class TClonesArray; | |
24 | class AliESDEvent; | |
25 | ||
26 | class AliTPCtracker : public AliTracker { | |
27 | public: | |
28 | AliTPCtracker(); | |
29 | AliTPCtracker(const AliTPCParam *par); | |
30 | ~AliTPCtracker(); | |
31 | ||
32 | Int_t ReadSeeds(const TFile *in); | |
33 | ||
34 | Int_t LoadClusters(TTree *c); | |
35 | void UnloadClusters(); | |
36 | ||
37 | AliCluster *GetCluster(Int_t index) const; | |
38 | Int_t Clusters2Tracks(AliESDEvent *event); | |
39 | Int_t PropagateBack(AliESDEvent *event); | |
40 | Int_t RefitInward(AliESDEvent *event); | |
41 | ||
42 | virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const; | |
43 | ||
44 | public: | |
45 | //**************** Internal tracker class ********************** | |
46 | class AliTPCRow { | |
47 | public: | |
48 | AliTPCRow(): | |
49 | fN(0), fSize(kMaxClusterPerRow/8), | |
50 | fClusterArray(new AliTPCcluster[fSize]), fX(0) {} | |
51 | ~AliTPCRow() {delete[] fClusterArray;} | |
52 | void InsertCluster(const AliTPCcluster *c, Int_t sec, Int_t row); | |
53 | void ResetClusters() {fN=0; delete[] fClusterArray; fClusterArray=0;} | |
54 | operator int() const {return fN;} | |
55 | const AliTPCcluster *operator[](Int_t i) const {return fClusters[i];} | |
56 | const AliTPCcluster *GetUnsortedCluster(Int_t i) const { | |
57 | if ((i < 0) || (i >= fN)) return NULL; | |
58 | return fClusterArray+i; | |
59 | } | |
60 | UInt_t GetIndex(Int_t i) const {return fIndex[i];} | |
61 | Int_t Find(Double_t y) const; | |
62 | void SetX(Double_t x) {fX=x;} | |
63 | Double_t GetX() const {return fX;} | |
64 | ||
65 | private: | |
66 | AliTPCRow(const AliTPCRow& r); //dummy copy constructor | |
67 | AliTPCRow &operator=(const AliTPCRow& r); //dummy assignment operator | |
68 | Int_t fN; //number of clusters | |
69 | const AliTPCcluster *fClusters[kMaxClusterPerRow]; //pointers to clusters | |
70 | Int_t fSize; //size of array of clusters | |
71 | AliTPCcluster *fClusterArray; //array of clusters | |
72 | UInt_t fIndex[kMaxClusterPerRow]; //indeces of clusters | |
73 | Double_t fX; //X-coordinate of this row | |
74 | }; | |
75 | ||
76 | //**************** Internal tracker class ********************** | |
77 | class AliTPCSector { | |
78 | public: | |
79 | AliTPCSector(): | |
80 | fN(0),fRow(0),fAlpha(0),fAlphaShift(0), | |
81 | fPadPitchWidth(0),f1PadPitchLength(0),f2PadPitchLength(0){} | |
82 | ~AliTPCSector() { delete[] fRow; } | |
83 | AliTPCRow& operator[](Int_t i) const { return *(fRow+i); } | |
84 | Int_t GetNRows() const { return fN; } | |
85 | void Setup(const AliTPCParam *par, Int_t flag); | |
86 | Double_t GetX(Int_t l) const {return fRow[l].GetX();} | |
87 | Double_t GetMaxY(Int_t l) const { | |
88 | return GetX(l)*TMath::Tan(0.5*GetAlpha()); | |
89 | } | |
90 | Double_t GetAlpha() const {return fAlpha;} | |
91 | Double_t GetAlphaShift() const {return fAlphaShift;} | |
92 | Int_t GetRowNumber(Double_t x) const { | |
93 | //return pad row number for this x | |
94 | Double_t r; | |
95 | if (fN < 64){ | |
96 | r=fRow[fN-1].GetX(); | |
97 | if (x > r) return fN; | |
98 | r=fRow[0].GetX(); | |
99 | if (x < r) return -1; | |
100 | return Int_t((x-r)/f1PadPitchLength + 0.5);} | |
101 | else{ | |
102 | r=fRow[fN-1].GetX(); | |
103 | if (x > r) return fN; | |
104 | r=fRow[0].GetX(); | |
105 | if (x < r) return -1; | |
106 | Double_t r1=fRow[64].GetX(); | |
107 | if(x<r1){ | |
108 | return Int_t((x-r)/f1PadPitchLength + 0.5);} | |
109 | else{ | |
110 | return (Int_t((x-r1)/f2PadPitchLength + 0.5)+64);} | |
111 | } | |
112 | } | |
113 | Double_t GetPadPitchWidth() const {return fPadPitchWidth;} | |
114 | ||
115 | private: | |
116 | Int_t fN; //number of pad rows | |
117 | AliTPCRow *fRow; //array of pad rows | |
118 | Double_t fAlpha; //opening angle | |
119 | Double_t fAlphaShift; //shift angle; | |
120 | Double_t fPadPitchWidth; //pad pitch width | |
121 | Double_t f1PadPitchLength; //pad pitch length | |
122 | Double_t f2PadPitchLength; //pad pitch length | |
123 | private: | |
124 | AliTPCSector(const AliTPCSector &s); //dummy copy contructor | |
125 | AliTPCSector& operator=(const AliTPCSector &s);//dummy assignment operator | |
126 | }; | |
127 | ||
128 | //**************** Internal tracker class ********************** | |
129 | class AliTPCseed : public AliTPCtrack { | |
130 | public: | |
131 | AliTPCseed():AliTPCtrack(){} | |
132 | AliTPCseed(const AliTPCtrack &t):AliTPCtrack(t){} | |
133 | AliTPCseed(Double_t xr, Double_t alpha, const Double_t xx[5], | |
134 | const Double_t cc[15], Int_t index): | |
135 | AliTPCtrack(xr, alpha, xx, cc, index) {} | |
136 | void SetSampledEdx(Float_t q, Int_t i) { | |
137 | Double_t s=GetSnp(), t=GetTgl(); | |
138 | q *= TMath::Sqrt((1-s*s)/(1+t*t)); | |
139 | fdEdxSample[i]=q; | |
140 | } | |
141 | void CookdEdx(Double_t low=0.05, Double_t up=0.70); | |
142 | ||
143 | private: | |
144 | Float_t fdEdxSample[200]; //array of dE/dx samples | |
145 | }; | |
146 | ||
147 | private: | |
148 | ||
149 | void MakeSeeds(Int_t i1, Int_t i2); | |
150 | Int_t FollowProlongation(AliTPCseed& t, Int_t rf=0); | |
151 | Int_t FollowBackProlongation(AliTPCseed &s, const AliTPCtrack &t); | |
152 | Int_t FollowRefitInward(AliTPCseed *seed, AliTPCtrack *track); | |
153 | ||
154 | AliTPCtracker(const AliTPCtracker& r); //dummy copy constructor | |
155 | AliTPCtracker &operator=(const AliTPCtracker& r);//dummy assignment operator | |
156 | ||
157 | const Int_t fkNIS; //number of inner sectors | |
158 | AliTPCSector *fInnerSec; //array of inner sectors | |
159 | const Int_t fkNOS; //number of outer sectors | |
160 | AliTPCSector *fOuterSec; //array of outer sectors | |
161 | ||
162 | Int_t fN; //number of "active" sectors | |
163 | AliTPCSector *fSectors; //pointer to "active" sectors; | |
164 | ||
165 | AliTPCParam *fParam; //! TPC parameters for outer reference plane [SR, GSI, 18.02.2003] | |
166 | TObjArray *fSeeds; //array of track seeds | |
167 | ||
168 | ClassDef(AliTPCtracker,2) // Time Projection Chamber tracker | |
169 | }; | |
170 | ||
171 | #endif | |
172 | ||
173 |