Update of tracking code for tilted pads
[u/mrichter/AliRoot.git] / TRD / AliTRDtracker.h
CommitLineData
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
fd621f36 43 Double_t GetTiltFactor(const AliTRDcluster* c);
44
5443e65e 45 void ReadClusters(TObjArray *array, const Char_t *filename);
46 Int_t CookSectorIndex(Int_t gs) { return kTRACKING_SECTORS - 1 - gs; }
47
48
49 Float_t GetSeedGap() const {return fSeedGap;}
50 Int_t GetMaxGap() const {return fMaxGap;}
51 Int_t GetTimeBinsPerPlane() const {return fTimeBinsPerPlane;}
52 Float_t GetSeedStep() const {return fSeedStep;}
53 Float_t GetSeedDepth() const {return fSeedDepth;}
54 Float_t GetSkipDepth() const {return fSkipDepth;}
55 Double_t GetMaxChi2() const {return fMaxChi2;}
56 Float_t GetMaxSeedC() const {return fMaxSeedC;}
57 Float_t GetMaxSeedTan() const {return fMaxSeedTan;}
58 Double_t GetSeedErrorSY() const {return fSeedErrorSY;}
59 Double_t GetSeedErrorSY3() const {return fSeedErrorSY3;}
60 Double_t GetSeedErrorSZ() const {return fSeedErrorSZ;}
61 Float_t GetLabelFraction() const {return fLabelFraction;}
62 Float_t GetWideRoad() const {return fWideRoad;}
63
64 Float_t GetMinClustersInTrack() const {return fMinClustersInTrack;}
65 Float_t GetMinClustersInSeed() const {return fMinClustersInSeed;}
66 Float_t GetMaxSeedDeltaZ() const {return fMaxSeedDeltaZ;}
67 Float_t GetMaxSeedVertexZ() const {return fMaxSeedVertexZ;}
68
69 // x <-> timebin conversions useful in analysis macros
70 Double_t GetX(Int_t sec, Int_t plane, Int_t local_tb) const;
71 Double_t GetX(Int_t sec, Int_t pl) const {
72 return fTrSec[sec]->GetLayer(pl)->GetX(); }
73 Int_t GetGlobalTimeBin(Int_t sec, Int_t plane, Int_t local_tb) const {
74 return fTrSec[sec]->CookTimeBinIndex(plane,local_tb); }
75 Double_t GetLayerNumber(Int_t sec, Double_t x) const {
76 return fTrSec[sec]->GetLayerNumber(x); }
77
78 public:
79 class AliTRDpropagationLayer {
80 // ***************** internal class *******************
81 public:
82 AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho,
83 Double_t x0, Int_t tb_index);
84
85 ~AliTRDpropagationLayer() {
86 if(fTimeBinIndex >= 0) { delete[] fClusters; delete[] fIndex; }
87 }
88 void InsertCluster(AliTRDcluster*, UInt_t);
89 operator Int_t() const {return fN;}
90 AliTRDcluster* operator[](Int_t i) {return fClusters[i];}
91 UInt_t GetIndex(Int_t i) const {return fIndex[i];}
92 Double_t GetX() const { return fX; }
93 Double_t GetdX() const { return fdX; }
94 Double_t GetRho() const { return fRho; }
95 Double_t GetX0() const { return fX0; }
96 Int_t GetTimeBinIndex() const { return fTimeBinIndex; }
97 void GetPropagationParameters(Double_t y, Double_t z,
98 Double_t &dx, Double_t &rho, Double_t &x0,
99 Bool_t &lookForCluster) const;
100 Int_t Find(Double_t y) const;
101 void SetZmax(Int_t cham, Double_t center, Double_t w)
102 { fZc[cham] = center; fZmax[cham] = w; }
103 void SetYmax(Double_t w) { fYmax = w; }
104 Double_t GetYmax() const { return fYmax; }
105 Double_t GetZmax(Int_t c) const { return fZmax[c]; }
106 Double_t GetZc(Int_t c) const { return fZc[c]; }
107
108 void SetHole(Double_t Zmax, Double_t Ymax,
109 Double_t rho = 1.29e-3, Double_t x0 = 36.66,
110 Double_t Yc = 0, Double_t Zc = 0);
111
112 void Clear() {for(Int_t i=0; i<fN; i++) fClusters[i] = NULL; fN = 0;}
113
114 private:
115
116 Int_t fN;
117 AliTRDcluster **fClusters; // array of pointers to clusters
118 UInt_t *fIndex; // array of cluster indexes
119 Double_t fX; // x coordinate of the middle plane
120 Double_t fdX; // radial thickness of the time bin
121 Double_t fRho; // default density of the material
122 Double_t fX0; // default radiation length
123 Int_t fTimeBinIndex; // plane * F(local_tb)
124 Double_t fZc[kZONES]; // Z position of the center for 5 active areas
125 Double_t fZmax[kZONES]; // half of active area length in Z
126 Double_t fYmax; // half of active area length in Y
127
128 Bool_t fHole; // kTRUE if there is a hole in the layer
129 Double_t fHoleZc; // Z of the center of the hole
130 Double_t fHoleZmax; // half of the hole length in Z
131 Double_t fHoleYc; // Y of the center of the hole
132 Double_t fHoleYmax; // half of the hole length in Y
133 Double_t fHoleRho; // density of the gas in the hole
134 Double_t fHoleX0; // radiation length of the gas in the hole
135 };
136
137 class AliTRDtrackingSector {
138 public:
139 AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par);
140 ~AliTRDtrackingSector() { for(Int_t i=0; i<fN; i++) delete fLayers[i]; }
141 Int_t GetNumberOfLayers() const { return fN; }
142 Int_t GetNumberOfTimeBins() const;
143 Double_t GetX(Int_t pl) const { return fLayers[pl]->GetX(); }
144 void MapTimeBinLayers();
145 Int_t GetLayerNumber(Double_t x) const;
146 Int_t GetInnerTimeBin() const;
147 Int_t GetOuterTimeBin() const;
148 Int_t GetLayerNumber(Int_t tb) const {return fTimeBinIndex[tb];}
149 Float_t GetTzeroShift() const { return fTzeroShift; }
150 Int_t Find(Double_t x) const;
151 void InsertLayer(AliTRDpropagationLayer* pl);
152 // AliTRDpropagationLayer* operator[](Int_t i) { return fLayers[i]; }
153 AliTRDpropagationLayer* GetLayer(Int_t i) { return fLayers[i]; }
154 Int_t CookTimeBinIndex(Int_t plane, Int_t local_tb) const;
155
156 private:
157 Int_t fN; // total number of layers
158 AliTRDgeometry *fGeom;
159 AliTRDparameter *fPar;
160 AliTRDpropagationLayer *fLayers[kMAX_LAYERS_PER_SECTOR];
161 Int_t fTimeBinIndex[kMAX_TIME_BIN_INDEX];
162 Float_t fTzeroShift; // T0 shift in cm
163 Int_t fGeomSector; // sector # in AliTRDgeometry
164 };
165
166 private:
167
168 void LoadEvent();
169 void UnloadEvent();
170
171 virtual void MakeSeeds(Int_t inner, Int_t outer, Int_t turn);
172
173 Int_t FollowProlongation(AliTRDtrack& t, Int_t rf);
174 Int_t FollowBackProlongation(AliTRDtrack& t);
175
176 Int_t PropagateToTPC(AliTRDtrack& t);
177 Int_t PropagateToOuterPlane(AliTRDtrack& t, Double_t x);
178
179 Int_t WriteTracks();
180 void ReadClusters(TObjArray *array, const TFile *in = 0);
181
182 void SetSY2corr(Float_t w) {fSY2corr = w;}
183 void SetSZ2corr(Float_t w) {fSZ2corr = w;}
184 Double_t ExpectedSigmaY2(Double_t r, Double_t tgl, Double_t pt);
185 Double_t ExpectedSigmaZ2(Double_t r, Double_t tgl);
186
46d29e70 187
188 protected:
189
5443e65e 190 Int_t fEvent; // Event number
46d29e70 191
5443e65e 192 AliTRDgeometry *fGeom; // Pointer to TRD geometry
193 AliTRDparameter *fPar;
bbf92647 194
5443e65e 195 AliTRDtrackingSector *fTrSec[kTRACKING_SECTORS];
196 // array of tracking sectors;
197
46d29e70 198 Int_t fNclusters; // Number of clusters in TRD
199 TObjArray *fClusters; // List of clusters for all sectors
200
201 Int_t fNseeds; // Number of track seeds
202 TObjArray *fSeeds; // List of track seeds
203
204 Int_t fNtracks; // Number of reconstructed tracks
205 TObjArray *fTracks; // List of reconstructed tracks
206
a819a5f7 207 Float_t fSY2corr; // Correction coefficient for
208 // cluster SigmaY2
209
5443e65e 210 Float_t fSZ2corr; // Correction coefficient for
211 // cluster SigmaZ2
212
213 static const Float_t fSeedGap; // Distance between inner and outer
0a29d0f1 214 // time bin in seeding
215 // (fraction of all time bins)
bbf92647 216
5443e65e 217 static const Float_t fSeedStep; // Step in iterations
218 static const Float_t fSeedDepth; // Fraction of TRD allocated for seeding
219 static const Float_t fSkipDepth; // Fraction of TRD which can be skipped
bbf92647 220 // in track prolongation
5443e65e 221 Int_t fTimeBinsPerPlane; // number of sensitive timebins per plane
222 Int_t fMaxGap; // max gap (in time bins) in the track
223 // in track prolongation
224
225 static const Double_t fMaxChi2; // max increment in track chi2
bbf92647 226
5443e65e 227 static const Float_t fMinClustersInTrack; // min number of clusters in track
228 // out of total timebins
229
230 static const Float_t fMinFractionOfFoundClusters; // min found clusters
231 // out of expected
232
233 static const Float_t fMinClustersInSeed; // min fraction of clusters in seed
234 static const Float_t fMaxSeedDeltaZ; // max dZ in MakeSeeds
235 static const Float_t fMaxSeedDeltaZ12; // max abs(z1-z2) in MakeSeeds
236 static const Float_t fMaxSeedC; // max initial curvature in MakeSeeds
237 static const Float_t fMaxSeedTan; // max initial Tangens(lambda) in MakeSeeds
238 static const Float_t fMaxSeedVertexZ; // max vertex Z in MakeSeeds
239 static const Double_t fSeedErrorSY; // sy parameter in MakeSeeds
240 static const Double_t fSeedErrorSY3; // sy3 parameter in MakeSeeds
241 static const Double_t fSeedErrorSZ; // sz parameter in MakeSeeds
242 static const Float_t fLabelFraction; // min fraction of same label
243 static const Float_t fWideRoad; // max road width in FindProlongation
244
245 Bool_t fVocal;
246 Bool_t fAddTRDseeds;
bbf92647 247
46d29e70 248 ClassDef(AliTRDtracker,1) // manager base class
249
250};
251
252#endif