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"
9 #include "AliBarrelTrack.h"
16 class AliTRDparameter;
21 const unsigned kMAX_LAYERS_PER_SECTOR = 1000;
22 const unsigned kMAX_TIME_BIN_INDEX = 216; // (30 drift + 6 ampl) * 6 planes
23 const unsigned kMAX_CLUSTER_PER_TIME_BIN = 7000;
24 const unsigned kZONES = 5;
25 const Int_t kTRACKING_SECTORS = 18;
27 class AliTRDtracker : public AliTracker {
31 AliTRDtracker():AliTracker() {}
32 AliTRDtracker(const TFile *in);
35 Int_t Clusters2Tracks(const TFile *in, TFile *out);
36 Int_t PropagateBack(const TFile *in, TFile *out);
37 //Int_t Refit(const TFile *in, TFile *out);
39 Int_t LoadClusters() {LoadEvent(); return 0;};
40 void UnloadClusters() {UnloadEvent();};
41 AliCluster *GetCluster(Int_t index) const { return (AliCluster*) fClusters->UncheckedAt(index); };
42 virtual void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
43 virtual void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
45 void SetAddTRDseeds() { fAddTRDseeds = kTRUE; }
46 void SetNoTilt() { fNoTilt = kTRUE; }
48 Double_t GetTiltFactor(const AliTRDcluster* c);
50 void ReadClusters(TObjArray *array, const Char_t *filename);
51 Int_t CookSectorIndex(Int_t gs) { return kTRACKING_SECTORS - 1 - gs; }
54 Float_t GetSeedGap() const {return fSeedGap;}
55 Int_t GetMaxGap() const {return fMaxGap;}
56 Int_t GetTimeBinsPerPlane() const {return fTimeBinsPerPlane;}
57 Float_t GetSeedStep() const {return fSeedStep;}
58 Float_t GetSeedDepth() const {return fSeedDepth;}
59 Float_t GetSkipDepth() const {return fSkipDepth;}
60 Double_t GetMaxChi2() const {return fMaxChi2;}
61 Float_t GetMaxSeedC() const {return fMaxSeedC;}
62 Float_t GetMaxSeedTan() const {return fMaxSeedTan;}
63 Double_t GetSeedErrorSY() const {return fSeedErrorSY;}
64 Double_t GetSeedErrorSY3() const {return fSeedErrorSY3;}
65 Double_t GetSeedErrorSZ() const {return fSeedErrorSZ;}
66 Float_t GetLabelFraction() const {return fLabelFraction;}
67 Float_t GetWideRoad() const {return fWideRoad;}
69 Float_t GetMinClustersInTrack() const {return fMinClustersInTrack;}
70 Float_t GetMinClustersInSeed() const {return fMinClustersInSeed;}
71 Float_t GetMaxSeedDeltaZ() const {return fMaxSeedDeltaZ;}
72 Float_t GetMaxSeedVertexZ() const {return fMaxSeedVertexZ;}
74 // x <-> timebin conversions useful in analysis macros
75 Double_t GetX(Int_t sec, Int_t plane, Int_t local_tb) const;
76 Double_t GetX(Int_t sec, Int_t pl) const {
77 return fTrSec[sec]->GetLayer(pl)->GetX(); }
78 Int_t GetGlobalTimeBin(Int_t sec, Int_t plane, Int_t local_tb) const {
79 return fTrSec[sec]->CookTimeBinIndex(plane,local_tb); }
80 Double_t GetLayerNumber(Int_t sec, Double_t x) const {
81 return fTrSec[sec]->GetLayerNumber(x); }
84 class AliTRDpropagationLayer {
85 // ***************** internal class *******************
87 AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho,
88 Double_t x0, Int_t tb_index);
90 ~AliTRDpropagationLayer() {
91 if(fTimeBinIndex >= 0) { delete[] fClusters; delete[] fIndex; }
93 void InsertCluster(AliTRDcluster*, UInt_t);
94 operator Int_t() const {return fN;}
95 AliTRDcluster* operator[](Int_t i) {return fClusters[i];}
96 UInt_t GetIndex(Int_t i) const {return fIndex[i];}
97 Double_t GetX() const { return fX; }
98 Double_t GetdX() const { return fdX; }
99 Double_t GetRho() const { return fRho; }
100 Double_t GetX0() const { return fX0; }
101 Int_t GetTimeBinIndex() const { return fTimeBinIndex; }
102 void GetPropagationParameters(Double_t y, Double_t z,
103 Double_t &dx, Double_t &rho, Double_t &x0,
104 Bool_t &lookForCluster) const;
105 Int_t Find(Double_t y) const;
106 void SetZmax(Int_t cham, Double_t center, Double_t w)
107 { fZc[cham] = center; fZmax[cham] = w; }
108 void SetYmax(Double_t w) { fYmax = w; }
109 Double_t GetYmax() const { return fYmax; }
110 Double_t GetZmax(Int_t c) const { return fZmax[c]; }
111 Double_t GetZc(Int_t c) const { return fZc[c]; }
113 void SetHole(Double_t Zmax, Double_t Ymax,
114 Double_t rho = 1.29e-3, Double_t x0 = 36.66,
115 Double_t Yc = 0, Double_t Zc = 0);
117 Bool_t IsSensitive() {return (fTimeBinIndex>=0)? kTRUE: kFALSE;}
119 void Clear() {for(Int_t i=0; i<fN; i++) fClusters[i] = NULL; fN = 0;}
124 AliTRDcluster **fClusters; // array of pointers to clusters
125 UInt_t *fIndex; // array of cluster indexes
126 Double_t fX; // x coordinate of the middle plane
127 Double_t fdX; // radial thickness of the time bin
128 Double_t fRho; // default density of the material
129 Double_t fX0; // default radiation length
130 Int_t fTimeBinIndex; // plane * F(local_tb)
131 Double_t fZc[kZONES]; // Z position of the center for 5 active areas
132 Double_t fZmax[kZONES]; // half of active area length in Z
133 Double_t fYmax; // half of active area length in Y
135 Bool_t fHole; // kTRUE if there is a hole in the layer
136 Double_t fHoleZc; // Z of the center of the hole
137 Double_t fHoleZmax; // half of the hole length in Z
138 Double_t fHoleYc; // Y of the center of the hole
139 Double_t fHoleYmax; // half of the hole length in Y
140 Double_t fHoleRho; // density of the gas in the hole
141 Double_t fHoleX0; // radiation length of the gas in the hole
144 class AliTRDtrackingSector {
146 AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par);
147 ~AliTRDtrackingSector() { for(Int_t i=0; i<fN; i++) delete fLayers[i]; }
148 Int_t GetNumberOfLayers() const { return fN; }
149 Int_t GetNumberOfTimeBins() const;
150 Double_t GetX(Int_t pl) const { return fLayers[pl]->GetX(); }
151 void MapTimeBinLayers();
152 Int_t GetLayerNumber(Double_t x) const;
153 Int_t GetInnerTimeBin() const;
154 Int_t GetOuterTimeBin() const;
155 Int_t GetLayerNumber(Int_t tb) const {return fTimeBinIndex[tb];}
156 Float_t GetTzeroShift() const { return fTzeroShift; }
157 Int_t Find(Double_t x) const;
158 void InsertLayer(AliTRDpropagationLayer* pl);
159 // AliTRDpropagationLayer* operator[](Int_t i) { return fLayers[i]; }
160 AliTRDpropagationLayer* GetLayer(Int_t i) { return fLayers[i]; }
161 Int_t CookTimeBinIndex(Int_t plane, Int_t local_tb) const;
164 Int_t fN; // total number of layers
165 AliTRDgeometry *fGeom;
166 AliTRDparameter *fPar;
167 AliTRDpropagationLayer *fLayers[kMAX_LAYERS_PER_SECTOR];
168 Int_t fTimeBinIndex[kMAX_TIME_BIN_INDEX];
169 Float_t fTzeroShift; // T0 shift in cm
170 Int_t fGeomSector; // sector # in AliTRDgeometry
178 virtual void MakeSeeds(Int_t inner, Int_t outer, Int_t turn);
180 Int_t FollowProlongation(AliTRDtrack& t, Int_t rf);
181 Int_t FollowBackProlongation(AliTRDtrack& t);
182 //Int_t FolowRefitInward(AliTRDtrack *seed, AliTPCtrack *track);
184 Int_t PropagateToTPC(AliTRDtrack& t);
185 Int_t PropagateToOuterPlane(AliTRDtrack& t, Double_t x);
188 void ReadClusters(TObjArray *array, const TFile *in = 0);
190 void SetSY2corr(Float_t w) {fSY2corr = w;}
191 void SetSZ2corr(Float_t w) {fSZ2corr = w;}
192 Double_t ExpectedSigmaY2(Double_t r, Double_t tgl, Double_t pt);
193 Double_t ExpectedSigmaZ2(Double_t r, Double_t tgl);
198 AliTRDgeometry *fGeom; // Pointer to TRD geometry
199 AliTRDparameter *fPar;
201 AliTRDtrackingSector *fTrSec[kTRACKING_SECTORS];
202 // array of tracking sectors;
204 Int_t fNclusters; // Number of clusters in TRD
205 TObjArray *fClusters; // List of clusters for all sectors
207 Int_t fNseeds; // Number of track seeds
208 TObjArray *fSeeds; // List of track seeds
210 Int_t fNtracks; // Number of reconstructed tracks
211 TObjArray *fTracks; // List of reconstructed tracks
213 Float_t fSY2corr; // Correction coefficient for
216 Float_t fSZ2corr; // Correction coefficient for
219 static const Float_t fSeedGap; // Distance between inner and outer
220 // time bin in seeding
221 // (fraction of all time bins)
223 static const Float_t fSeedStep; // Step in iterations
224 static const Float_t fSeedDepth; // Fraction of TRD allocated for seeding
225 static const Float_t fSkipDepth; // Fraction of TRD which can be skipped
226 // in track prolongation
227 Int_t fTimeBinsPerPlane; // number of sensitive timebins per plane
228 Int_t fMaxGap; // max gap (in time bins) in the track
229 // in track prolongation
231 static const Double_t fMaxChi2; // max increment in track chi2
233 static const Float_t fMinClustersInTrack; // min number of clusters in track
234 // out of total timebins
236 static const Float_t fMinFractionOfFoundClusters; // min found clusters
239 static const Float_t fMinClustersInSeed; // min fraction of clusters in seed
240 static const Float_t fMaxSeedDeltaZ; // max dZ in MakeSeeds
241 static const Float_t fMaxSeedDeltaZ12; // max abs(z1-z2) in MakeSeeds
242 static const Float_t fMaxSeedC; // max initial curvature in MakeSeeds
243 static const Float_t fMaxSeedTan; // max initial Tangens(lambda) in MakeSeeds
244 static const Float_t fMaxSeedVertexZ; // max vertex Z in MakeSeeds
245 static const Double_t fSeedErrorSY; // sy parameter in MakeSeeds
246 static const Double_t fSeedErrorSY3; // sy3 parameter in MakeSeeds
247 static const Double_t fSeedErrorSZ; // sz parameter in MakeSeeds
248 static const Float_t fLabelFraction; // min fraction of same label
249 static const Float_t fWideRoad; // max road width in FindProlongation
257 Bool_t AdjustSector(AliTRDtrack *track);
260 // Barrel tracks [SR, 03.04.2003]
262 static const Int_t kFirstPlane; // Id of the first (innermost) reference plane
263 static const Int_t kLastPlane; // Id of the last (outermost) reference plane
265 void SetBarrelTree(const char *mode);
266 void StoreBarrelTrack(AliTRDtrack *ps, Int_t refPlane, Int_t isIn);
270 TClonesArray *fBarrelArray;
271 AliBarrelTrack *fBarrelTrack;
274 ClassDef(AliTRDtracker,1) // manager base class