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Introducing Riostream.h
[u/mrichter/AliRoot.git] / TRD / AliTRDtracker.h
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46d29e70 1#ifndef ALITRDTRACKER_H
2#define ALITRDTRACKER_H
3
4/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
5443e65e 7#include "AliTracker.h"
46d29e70 8
9class TFile;
bbf92647 10class TParticle;
11class TParticlePDG;
46d29e70 12class TObjArray;
13
14class AliTRDgeometry;
5443e65e 15class AliTRDparameter;
46d29e70 16class AliTRDtrack;
5443e65e 17class AliTRDcluster;
bbf92647 18class AliTRDmcTrack;
46d29e70 19
5443e65e 20const unsigned kMAX_LAYERS_PER_SECTOR = 1000;
21const unsigned kMAX_TIME_BIN_INDEX = 216; // (30 drift + 6 ampl) * 6 planes
22const unsigned kMAX_CLUSTER_PER_TIME_BIN = 3500;
23const unsigned kZONES = 5;
24const Int_t kTRACKING_SECTORS = 18;
25
26class AliTRDtracker : public AliTracker {
46d29e70 27
28 public:
29
5443e65e 30 AliTRDtracker():AliTracker() {}
31 AliTRDtracker(const TFile *in);
32 ~AliTRDtracker();
33
34 Int_t Clusters2Tracks(const TFile *in, TFile *out);
35 Int_t PropagateBack(const TFile *in, TFile *out);
36 AliCluster *GetCluster(Int_t index) const { return NULL; };
37 virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
38 virtual void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
39
40 void SetEventNumber(Int_t event) { fEvent = event; }
41 void SetAddTRDseeds() { fAddTRDseeds = kTRUE; }
42
43 void ReadClusters(TObjArray *array, const Char_t *filename);
44 Int_t CookSectorIndex(Int_t gs) { return kTRACKING_SECTORS - 1 - gs; }
45
46
47 Float_t GetSeedGap() const {return fSeedGap;}
48 Int_t GetMaxGap() const {return fMaxGap;}
49 Int_t GetTimeBinsPerPlane() const {return fTimeBinsPerPlane;}
50 Float_t GetSeedStep() const {return fSeedStep;}
51 Float_t GetSeedDepth() const {return fSeedDepth;}
52 Float_t GetSkipDepth() const {return fSkipDepth;}
53 Double_t GetMaxChi2() const {return fMaxChi2;}
54 Float_t GetMaxSeedC() const {return fMaxSeedC;}
55 Float_t GetMaxSeedTan() const {return fMaxSeedTan;}
56 Double_t GetSeedErrorSY() const {return fSeedErrorSY;}
57 Double_t GetSeedErrorSY3() const {return fSeedErrorSY3;}
58 Double_t GetSeedErrorSZ() const {return fSeedErrorSZ;}
59 Float_t GetLabelFraction() const {return fLabelFraction;}
60 Float_t GetWideRoad() const {return fWideRoad;}
61
62 Float_t GetMinClustersInTrack() const {return fMinClustersInTrack;}
63 Float_t GetMinClustersInSeed() const {return fMinClustersInSeed;}
64 Float_t GetMaxSeedDeltaZ() const {return fMaxSeedDeltaZ;}
65 Float_t GetMaxSeedVertexZ() const {return fMaxSeedVertexZ;}
66
67 // x <-> timebin conversions useful in analysis macros
68 Double_t GetX(Int_t sec, Int_t plane, Int_t local_tb) const;
69 Double_t GetX(Int_t sec, Int_t pl) const {
70 return fTrSec[sec]->GetLayer(pl)->GetX(); }
71 Int_t GetGlobalTimeBin(Int_t sec, Int_t plane, Int_t local_tb) const {
72 return fTrSec[sec]->CookTimeBinIndex(plane,local_tb); }
73 Double_t GetLayerNumber(Int_t sec, Double_t x) const {
74 return fTrSec[sec]->GetLayerNumber(x); }
75
76 public:
77 class AliTRDpropagationLayer {
78 // ***************** internal class *******************
79 public:
80 AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho,
81 Double_t x0, Int_t tb_index);
82
83 ~AliTRDpropagationLayer() {
84 if(fTimeBinIndex >= 0) { delete[] fClusters; delete[] fIndex; }
85 }
86 void InsertCluster(AliTRDcluster*, UInt_t);
87 operator Int_t() const {return fN;}
88 AliTRDcluster* operator[](Int_t i) {return fClusters[i];}
89 UInt_t GetIndex(Int_t i) const {return fIndex[i];}
90 Double_t GetX() const { return fX; }
91 Double_t GetdX() const { return fdX; }
92 Double_t GetRho() const { return fRho; }
93 Double_t GetX0() const { return fX0; }
94 Int_t GetTimeBinIndex() const { return fTimeBinIndex; }
95 void GetPropagationParameters(Double_t y, Double_t z,
96 Double_t &dx, Double_t &rho, Double_t &x0,
97 Bool_t &lookForCluster) const;
98 Int_t Find(Double_t y) const;
99 void SetZmax(Int_t cham, Double_t center, Double_t w)
100 { fZc[cham] = center; fZmax[cham] = w; }
101 void SetYmax(Double_t w) { fYmax = w; }
102 Double_t GetYmax() const { return fYmax; }
103 Double_t GetZmax(Int_t c) const { return fZmax[c]; }
104 Double_t GetZc(Int_t c) const { return fZc[c]; }
105
106 void SetHole(Double_t Zmax, Double_t Ymax,
107 Double_t rho = 1.29e-3, Double_t x0 = 36.66,
108 Double_t Yc = 0, Double_t Zc = 0);
109
110 void Clear() {for(Int_t i=0; i<fN; i++) fClusters[i] = NULL; fN = 0;}
111
112 private:
113
114 Int_t fN;
115 AliTRDcluster **fClusters; // array of pointers to clusters
116 UInt_t *fIndex; // array of cluster indexes
117 Double_t fX; // x coordinate of the middle plane
118 Double_t fdX; // radial thickness of the time bin
119 Double_t fRho; // default density of the material
120 Double_t fX0; // default radiation length
121 Int_t fTimeBinIndex; // plane * F(local_tb)
122 Double_t fZc[kZONES]; // Z position of the center for 5 active areas
123 Double_t fZmax[kZONES]; // half of active area length in Z
124 Double_t fYmax; // half of active area length in Y
125
126 Bool_t fHole; // kTRUE if there is a hole in the layer
127 Double_t fHoleZc; // Z of the center of the hole
128 Double_t fHoleZmax; // half of the hole length in Z
129 Double_t fHoleYc; // Y of the center of the hole
130 Double_t fHoleYmax; // half of the hole length in Y
131 Double_t fHoleRho; // density of the gas in the hole
132 Double_t fHoleX0; // radiation length of the gas in the hole
133 };
134
135 class AliTRDtrackingSector {
136 public:
137 AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par);
138 ~AliTRDtrackingSector() { for(Int_t i=0; i<fN; i++) delete fLayers[i]; }
139 Int_t GetNumberOfLayers() const { return fN; }
140 Int_t GetNumberOfTimeBins() const;
141 Double_t GetX(Int_t pl) const { return fLayers[pl]->GetX(); }
142 void MapTimeBinLayers();
143 Int_t GetLayerNumber(Double_t x) const;
144 Int_t GetInnerTimeBin() const;
145 Int_t GetOuterTimeBin() const;
146 Int_t GetLayerNumber(Int_t tb) const {return fTimeBinIndex[tb];}
147 Float_t GetTzeroShift() const { return fTzeroShift; }
148 Int_t Find(Double_t x) const;
149 void InsertLayer(AliTRDpropagationLayer* pl);
150 // AliTRDpropagationLayer* operator[](Int_t i) { return fLayers[i]; }
151 AliTRDpropagationLayer* GetLayer(Int_t i) { return fLayers[i]; }
152 Int_t CookTimeBinIndex(Int_t plane, Int_t local_tb) const;
153
154 private:
155 Int_t fN; // total number of layers
156 AliTRDgeometry *fGeom;
157 AliTRDparameter *fPar;
158 AliTRDpropagationLayer *fLayers[kMAX_LAYERS_PER_SECTOR];
159 Int_t fTimeBinIndex[kMAX_TIME_BIN_INDEX];
160 Float_t fTzeroShift; // T0 shift in cm
161 Int_t fGeomSector; // sector # in AliTRDgeometry
162 };
163
164 private:
165
166 void LoadEvent();
167 void UnloadEvent();
168
169 virtual void MakeSeeds(Int_t inner, Int_t outer, Int_t turn);
170
171 Int_t FollowProlongation(AliTRDtrack& t, Int_t rf);
172 Int_t FollowBackProlongation(AliTRDtrack& t);
173
174 Int_t PropagateToTPC(AliTRDtrack& t);
175 Int_t PropagateToOuterPlane(AliTRDtrack& t, Double_t x);
176
177 Int_t WriteTracks();
178 void ReadClusters(TObjArray *array, const TFile *in = 0);
179
180 void SetSY2corr(Float_t w) {fSY2corr = w;}
181 void SetSZ2corr(Float_t w) {fSZ2corr = w;}
182 Double_t ExpectedSigmaY2(Double_t r, Double_t tgl, Double_t pt);
183 Double_t ExpectedSigmaZ2(Double_t r, Double_t tgl);
184
46d29e70 185
186 protected:
187
5443e65e 188 Int_t fEvent; // Event number
46d29e70 189
5443e65e 190 AliTRDgeometry *fGeom; // Pointer to TRD geometry
191 AliTRDparameter *fPar;
bbf92647 192
5443e65e 193 AliTRDtrackingSector *fTrSec[kTRACKING_SECTORS];
194 // array of tracking sectors;
195
46d29e70 196 Int_t fNclusters; // Number of clusters in TRD
197 TObjArray *fClusters; // List of clusters for all sectors
198
199 Int_t fNseeds; // Number of track seeds
200 TObjArray *fSeeds; // List of track seeds
201
202 Int_t fNtracks; // Number of reconstructed tracks
203 TObjArray *fTracks; // List of reconstructed tracks
204
a819a5f7 205 Float_t fSY2corr; // Correction coefficient for
206 // cluster SigmaY2
207
5443e65e 208 Float_t fSZ2corr; // Correction coefficient for
209 // cluster SigmaZ2
210
211 static const Float_t fSeedGap; // Distance between inner and outer
0a29d0f1 212 // time bin in seeding
213 // (fraction of all time bins)
bbf92647 214
5443e65e 215 static const Float_t fSeedStep; // Step in iterations
216 static const Float_t fSeedDepth; // Fraction of TRD allocated for seeding
217 static const Float_t fSkipDepth; // Fraction of TRD which can be skipped
bbf92647 218 // in track prolongation
5443e65e 219 Int_t fTimeBinsPerPlane; // number of sensitive timebins per plane
220 Int_t fMaxGap; // max gap (in time bins) in the track
221 // in track prolongation
222
223 static const Double_t fMaxChi2; // max increment in track chi2
bbf92647 224
5443e65e 225 static const Float_t fMinClustersInTrack; // min number of clusters in track
226 // out of total timebins
227
228 static const Float_t fMinFractionOfFoundClusters; // min found clusters
229 // out of expected
230
231 static const Float_t fMinClustersInSeed; // min fraction of clusters in seed
232 static const Float_t fMaxSeedDeltaZ; // max dZ in MakeSeeds
233 static const Float_t fMaxSeedDeltaZ12; // max abs(z1-z2) in MakeSeeds
234 static const Float_t fMaxSeedC; // max initial curvature in MakeSeeds
235 static const Float_t fMaxSeedTan; // max initial Tangens(lambda) in MakeSeeds
236 static const Float_t fMaxSeedVertexZ; // max vertex Z in MakeSeeds
237 static const Double_t fSeedErrorSY; // sy parameter in MakeSeeds
238 static const Double_t fSeedErrorSY3; // sy3 parameter in MakeSeeds
239 static const Double_t fSeedErrorSZ; // sz parameter in MakeSeeds
240 static const Float_t fLabelFraction; // min fraction of same label
241 static const Float_t fWideRoad; // max road width in FindProlongation
242
243 Bool_t fVocal;
244 Bool_t fAddTRDseeds;
bbf92647 245
46d29e70 246 ClassDef(AliTRDtracker,1) // manager base class
247
248};
249
250#endif