1 #ifndef ALITRDTRACKER_H
2 #define ALITRDTRACKER_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
7 #include "AliTracker.h"
15 class AliTRDparameter;
20 const unsigned kMAX_LAYERS_PER_SECTOR = 1000;
21 const unsigned kMAX_TIME_BIN_INDEX = 216; // (30 drift + 6 ampl) * 6 planes
22 const unsigned kMAX_CLUSTER_PER_TIME_BIN = 7000;
23 const unsigned kZONES = 5;
24 const Int_t kTRACKING_SECTORS = 18;
26 class AliTRDtracker : public AliTracker {
30 AliTRDtracker():AliTracker() {}
31 AliTRDtracker(const TFile *in);
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;
40 void SetEventNumber(Int_t event) { fEvent = event; }
41 void SetAddTRDseeds() { fAddTRDseeds = kTRUE; }
42 void SetNoTilt() { fNoTilt = kTRUE; }
44 Double_t GetTiltFactor(const AliTRDcluster* c);
46 void ReadClusters(TObjArray *array, const Char_t *filename);
47 Int_t CookSectorIndex(Int_t gs) { return kTRACKING_SECTORS - 1 - gs; }
50 Float_t GetSeedGap() const {return fSeedGap;}
51 Int_t GetMaxGap() const {return fMaxGap;}
52 Int_t GetTimeBinsPerPlane() const {return fTimeBinsPerPlane;}
53 Float_t GetSeedStep() const {return fSeedStep;}
54 Float_t GetSeedDepth() const {return fSeedDepth;}
55 Float_t GetSkipDepth() const {return fSkipDepth;}
56 Double_t GetMaxChi2() const {return fMaxChi2;}
57 Float_t GetMaxSeedC() const {return fMaxSeedC;}
58 Float_t GetMaxSeedTan() const {return fMaxSeedTan;}
59 Double_t GetSeedErrorSY() const {return fSeedErrorSY;}
60 Double_t GetSeedErrorSY3() const {return fSeedErrorSY3;}
61 Double_t GetSeedErrorSZ() const {return fSeedErrorSZ;}
62 Float_t GetLabelFraction() const {return fLabelFraction;}
63 Float_t GetWideRoad() const {return fWideRoad;}
65 Float_t GetMinClustersInTrack() const {return fMinClustersInTrack;}
66 Float_t GetMinClustersInSeed() const {return fMinClustersInSeed;}
67 Float_t GetMaxSeedDeltaZ() const {return fMaxSeedDeltaZ;}
68 Float_t GetMaxSeedVertexZ() const {return fMaxSeedVertexZ;}
70 // x <-> timebin conversions useful in analysis macros
71 Double_t GetX(Int_t sec, Int_t plane, Int_t local_tb) const;
72 Double_t GetX(Int_t sec, Int_t pl) const {
73 return fTrSec[sec]->GetLayer(pl)->GetX(); }
74 Int_t GetGlobalTimeBin(Int_t sec, Int_t plane, Int_t local_tb) const {
75 return fTrSec[sec]->CookTimeBinIndex(plane,local_tb); }
76 Double_t GetLayerNumber(Int_t sec, Double_t x) const {
77 return fTrSec[sec]->GetLayerNumber(x); }
80 class AliTRDpropagationLayer {
81 // ***************** internal class *******************
83 AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho,
84 Double_t x0, Int_t tb_index);
86 ~AliTRDpropagationLayer() {
87 if(fTimeBinIndex >= 0) { delete[] fClusters; delete[] fIndex; }
89 void InsertCluster(AliTRDcluster*, UInt_t);
90 operator Int_t() const {return fN;}
91 AliTRDcluster* operator[](Int_t i) {return fClusters[i];}
92 UInt_t GetIndex(Int_t i) const {return fIndex[i];}
93 Double_t GetX() const { return fX; }
94 Double_t GetdX() const { return fdX; }
95 Double_t GetRho() const { return fRho; }
96 Double_t GetX0() const { return fX0; }
97 Int_t GetTimeBinIndex() const { return fTimeBinIndex; }
98 void GetPropagationParameters(Double_t y, Double_t z,
99 Double_t &dx, Double_t &rho, Double_t &x0,
100 Bool_t &lookForCluster) const;
101 Int_t Find(Double_t y) const;
102 void SetZmax(Int_t cham, Double_t center, Double_t w)
103 { fZc[cham] = center; fZmax[cham] = w; }
104 void SetYmax(Double_t w) { fYmax = w; }
105 Double_t GetYmax() const { return fYmax; }
106 Double_t GetZmax(Int_t c) const { return fZmax[c]; }
107 Double_t GetZc(Int_t c) const { return fZc[c]; }
109 void SetHole(Double_t Zmax, Double_t Ymax,
110 Double_t rho = 1.29e-3, Double_t x0 = 36.66,
111 Double_t Yc = 0, Double_t Zc = 0);
113 void Clear() {for(Int_t i=0; i<fN; i++) fClusters[i] = NULL; fN = 0;}
118 AliTRDcluster **fClusters; // array of pointers to clusters
119 UInt_t *fIndex; // array of cluster indexes
120 Double_t fX; // x coordinate of the middle plane
121 Double_t fdX; // radial thickness of the time bin
122 Double_t fRho; // default density of the material
123 Double_t fX0; // default radiation length
124 Int_t fTimeBinIndex; // plane * F(local_tb)
125 Double_t fZc[kZONES]; // Z position of the center for 5 active areas
126 Double_t fZmax[kZONES]; // half of active area length in Z
127 Double_t fYmax; // half of active area length in Y
129 Bool_t fHole; // kTRUE if there is a hole in the layer
130 Double_t fHoleZc; // Z of the center of the hole
131 Double_t fHoleZmax; // half of the hole length in Z
132 Double_t fHoleYc; // Y of the center of the hole
133 Double_t fHoleYmax; // half of the hole length in Y
134 Double_t fHoleRho; // density of the gas in the hole
135 Double_t fHoleX0; // radiation length of the gas in the hole
138 class AliTRDtrackingSector {
140 AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par);
141 ~AliTRDtrackingSector() { for(Int_t i=0; i<fN; i++) delete fLayers[i]; }
142 Int_t GetNumberOfLayers() const { return fN; }
143 Int_t GetNumberOfTimeBins() const;
144 Double_t GetX(Int_t pl) const { return fLayers[pl]->GetX(); }
145 void MapTimeBinLayers();
146 Int_t GetLayerNumber(Double_t x) const;
147 Int_t GetInnerTimeBin() const;
148 Int_t GetOuterTimeBin() const;
149 Int_t GetLayerNumber(Int_t tb) const {return fTimeBinIndex[tb];}
150 Float_t GetTzeroShift() const { return fTzeroShift; }
151 Int_t Find(Double_t x) const;
152 void InsertLayer(AliTRDpropagationLayer* pl);
153 // AliTRDpropagationLayer* operator[](Int_t i) { return fLayers[i]; }
154 AliTRDpropagationLayer* GetLayer(Int_t i) { return fLayers[i]; }
155 Int_t CookTimeBinIndex(Int_t plane, Int_t local_tb) const;
158 Int_t fN; // total number of layers
159 AliTRDgeometry *fGeom;
160 AliTRDparameter *fPar;
161 AliTRDpropagationLayer *fLayers[kMAX_LAYERS_PER_SECTOR];
162 Int_t fTimeBinIndex[kMAX_TIME_BIN_INDEX];
163 Float_t fTzeroShift; // T0 shift in cm
164 Int_t fGeomSector; // sector # in AliTRDgeometry
172 virtual void MakeSeeds(Int_t inner, Int_t outer, Int_t turn);
174 Int_t FollowProlongation(AliTRDtrack& t, Int_t rf);
175 Int_t FollowBackProlongation(AliTRDtrack& t);
177 Int_t PropagateToTPC(AliTRDtrack& t);
178 Int_t PropagateToOuterPlane(AliTRDtrack& t, Double_t x);
181 void ReadClusters(TObjArray *array, const TFile *in = 0);
183 void SetSY2corr(Float_t w) {fSY2corr = w;}
184 void SetSZ2corr(Float_t w) {fSZ2corr = w;}
185 Double_t ExpectedSigmaY2(Double_t r, Double_t tgl, Double_t pt);
186 Double_t ExpectedSigmaZ2(Double_t r, Double_t tgl);
191 Int_t fEvent; // Event number
193 AliTRDgeometry *fGeom; // Pointer to TRD geometry
194 AliTRDparameter *fPar;
196 AliTRDtrackingSector *fTrSec[kTRACKING_SECTORS];
197 // array of tracking sectors;
199 Int_t fNclusters; // Number of clusters in TRD
200 TObjArray *fClusters; // List of clusters for all sectors
202 Int_t fNseeds; // Number of track seeds
203 TObjArray *fSeeds; // List of track seeds
205 Int_t fNtracks; // Number of reconstructed tracks
206 TObjArray *fTracks; // List of reconstructed tracks
208 Float_t fSY2corr; // Correction coefficient for
211 Float_t fSZ2corr; // Correction coefficient for
214 static const Float_t fSeedGap; // Distance between inner and outer
215 // time bin in seeding
216 // (fraction of all time bins)
218 static const Float_t fSeedStep; // Step in iterations
219 static const Float_t fSeedDepth; // Fraction of TRD allocated for seeding
220 static const Float_t fSkipDepth; // Fraction of TRD which can be skipped
221 // in track prolongation
222 Int_t fTimeBinsPerPlane; // number of sensitive timebins per plane
223 Int_t fMaxGap; // max gap (in time bins) in the track
224 // in track prolongation
226 static const Double_t fMaxChi2; // max increment in track chi2
228 static const Float_t fMinClustersInTrack; // min number of clusters in track
229 // out of total timebins
231 static const Float_t fMinFractionOfFoundClusters; // min found clusters
234 static const Float_t fMinClustersInSeed; // min fraction of clusters in seed
235 static const Float_t fMaxSeedDeltaZ; // max dZ in MakeSeeds
236 static const Float_t fMaxSeedDeltaZ12; // max abs(z1-z2) in MakeSeeds
237 static const Float_t fMaxSeedC; // max initial curvature in MakeSeeds
238 static const Float_t fMaxSeedTan; // max initial Tangens(lambda) in MakeSeeds
239 static const Float_t fMaxSeedVertexZ; // max vertex Z in MakeSeeds
240 static const Double_t fSeedErrorSY; // sy parameter in MakeSeeds
241 static const Double_t fSeedErrorSY3; // sy3 parameter in MakeSeeds
242 static const Double_t fSeedErrorSZ; // sz parameter in MakeSeeds
243 static const Float_t fLabelFraction; // min fraction of same label
244 static const Float_t fWideRoad; // max road width in FindProlongation
251 ClassDef(AliTRDtracker,1) // manager base class