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e43c066c | 1 | #ifndef ALIITSTRACKERMI_H |
2 | #define ALIITSTRACKERMI_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
bf6adc12 | 6 | /* $Id$ */ |
7 | ||
e43c066c | 8 | //------------------------------------------------------------------------- |
9 | // ITS tracker | |
15dd636f | 10 | // reads AliITSclusterMI clusters and creates AliITStrackMI tracks |
11 | // Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch | |
e43c066c | 12 | //------------------------------------------------------------------------- |
13 | ||
bf6adc12 | 14 | class TTree; |
15 | class TTreeSRedirector; | |
e43c066c | 16 | #include <TObjArray.h> |
17 | ||
e43c066c | 18 | class AliESD; |
e43c066c | 19 | class AliHelix; |
bf6adc12 | 20 | class AliITSgeom; |
e43c066c | 21 | class AliV0vertex; |
67c1e979 | 22 | |
bf6adc12 | 23 | #include "AliITSclusterV2.h" |
24 | #include "AliITStrackMI.h" | |
25 | #include "AliTracker.h" | |
26 | #include "AliV0vertex.h" | |
e43c066c | 27 | |
28 | //------------------------------------------------------------------------- | |
29 | class AliITStrackerMI : public AliTracker { | |
30 | public: | |
31 | AliITStrackerMI():AliTracker(){} | |
32 | AliITStrackerMI(const AliITSgeom *geom); | |
628e7bb0 | 33 | ~AliITStrackerMI(); |
e43c066c | 34 | AliCluster *GetCluster(Int_t index) const; |
df29e9a4 | 35 | virtual Bool_t GetTrackPoint(Int_t index, AliTrackPoint& p) const; |
e43c066c | 36 | AliITSclusterV2 *GetClusterLayer(Int_t layn, Int_t ncl) const |
37 | {return fgLayers[layn].GetCluster(ncl);} | |
38 | Int_t GetNumberOfClustersLayer(Int_t layn) const | |
39 | {return fgLayers[layn].GetNumberOfClusters();} | |
40 | Int_t LoadClusters(TTree *cf); | |
41 | void UnloadClusters(); | |
e43c066c | 42 | Int_t Clusters2Tracks(AliESD *event); |
43 | Int_t PropagateBack(AliESD *event); | |
44 | Int_t RefitInward(AliESD *event); | |
15dd636f | 45 | Bool_t RefitAt(Double_t x, AliITStrackMI *seed, const AliITStrackMI *t); |
67c1e979 | 46 | Bool_t RefitAt(Double_t x, AliITStrackMI *seed, const Int_t *clindex); |
e43c066c | 47 | void SetupFirstPass(Int_t *flags, Double_t *cuts=0); |
48 | void SetupSecondPass(Int_t *flags, Double_t *cuts=0); | |
49 | ||
50 | void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;} | |
51 | void SetLayersNotToSkip(Int_t *l); | |
52 | void UseClusters(const AliKalmanTrack *t, Int_t from=0) const; | |
53 | void GetNTeor(Int_t layer, const AliITSclusterV2* cl, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz); | |
54 | Int_t GetError(Int_t layer, const AliITSclusterV2*cl, Float_t theta, Float_t phi, Float_t expQ, Float_t &erry, Float_t &errz); | |
628e7bb0 | 55 | |
56 | void GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz); | |
15dd636f | 57 | Double_t GetPredictedChi2MI(AliITStrackMI* track, const AliITSclusterV2 *cluster,Int_t layer); |
58 | Int_t UpdateMI(AliITStrackMI* track, const AliITSclusterV2* cl,Double_t chi2,Int_t layer) const; | |
e43c066c | 59 | class AliITSdetector { |
60 | public: | |
61 | AliITSdetector(){} | |
62 | AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi; fSinPhi = TMath::Sin(phi); fCosPhi = TMath::Cos(phi); | |
63 | fYmin=10000;fYmax=-1000; fZmin=10000;fZmax=-1000;} | |
64 | inline void GetGlobalXYZ( const AliITSclusterV2 *cl, Double_t xyz[3]) const; | |
65 | Double_t GetR() const {return fR;} | |
66 | Double_t GetPhi() const {return fPhi;} | |
67 | Double_t GetYmin() const {return fYmin;} | |
68 | Double_t GetYmax() const {return fYmax;} | |
69 | Double_t GetZmin() const {return fZmin;} | |
70 | Double_t GetZmax() const {return fZmax;} | |
71 | void SetYmin(Double_t min) {fYmin = min;} | |
72 | void SetYmax(Double_t max) {fYmax = max;} | |
73 | void SetZmin(Double_t min) {fZmin = min;} | |
74 | void SetZmax(Double_t max) {fZmax = max;} | |
75 | private: | |
76 | Double_t fR; // polar coordinates | |
77 | Double_t fPhi; // of this detector | |
78 | Double_t fSinPhi; // sin of phi; | |
79 | Double_t fCosPhi; // cos of phi | |
80 | Double_t fYmin; // local y minimal | |
81 | Double_t fYmax; // local max y | |
82 | Double_t fZmin; // local z min | |
83 | Double_t fZmax; // local z max | |
84 | }; | |
85 | ||
86 | class AliITSlayer { | |
87 | friend class AliITStrackerMI; | |
88 | public: | |
89 | AliITSlayer(); | |
90 | AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd); | |
91 | ~AliITSlayer(); | |
92 | Int_t InsertCluster(AliITSclusterV2 *c); | |
93 | void SortClusters(); | |
94 | void ResetClusters(); | |
95 | void ResetWeights(); | |
96 | void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma); | |
97 | const AliITSclusterV2 *GetNextCluster(Int_t &ci); | |
98 | void ResetRoad(); | |
99 | Double_t GetRoad() const {return fRoad;} | |
100 | Double_t GetR() const {return fR;} | |
101 | Int_t FindClusterIndex(Float_t z) const; | |
102 | AliITSclusterV2 *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;} | |
bf6adc12 | 103 | Float_t *GetWeight(Int_t i) {return i<fN ?&fClusterWeight[i]:0;} |
e43c066c | 104 | AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; } |
105 | Int_t FindDetectorIndex(Double_t phi, Double_t z) const; | |
106 | Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const; | |
107 | Int_t InRoad() const ; | |
108 | Int_t GetNumberOfClusters() const {return fN;} | |
109 | Int_t GetNladders() const {return fNladders;} | |
110 | Int_t GetNdetectors() const {return fNdetectors;} | |
111 | Int_t GetSkip() const {return fSkip;} | |
112 | void SetSkip(Int_t skip){fSkip=skip;} | |
113 | void IncAccepted(){fAccepted++;} | |
81e97e0d | 114 | Int_t GetAccepted() const {return fAccepted;} |
e43c066c | 115 | protected: |
bf6adc12 | 116 | AliITSlayer(const AliITSlayer& /*layer*/); |
117 | AliITSlayer & operator=(const AliITSlayer& /*layer*/); | |
e43c066c | 118 | Double_t fR; // mean radius of this layer |
119 | Double_t fPhiOffset; // offset of the first detector in Phi | |
120 | Int_t fNladders; // number of ladders | |
121 | Double_t fZOffset; // offset of the first detector in Z | |
122 | Int_t fNdetectors; // detectors/ladder | |
123 | AliITSdetector *fDetectors; // array of detectors | |
124 | Int_t fN; // number of clusters | |
125 | AliITSclusterV2 *fClusters[kMaxClusterPerLayer]; // pointers to clusters | |
126 | Int_t fClusterIndex[kMaxClusterPerLayer]; // pointers to clusters | |
127 | Float_t fY[kMaxClusterPerLayer]; // y position of the clusters | |
128 | Float_t fZ[kMaxClusterPerLayer]; // z position of the clusters | |
129 | Float_t fYB[2]; // ymin and ymax | |
130 | // | |
131 | AliITSclusterV2 *fClusters5[6][kMaxClusterPerLayer5]; // pointers to clusters - slice in y | |
132 | Int_t fClusterIndex5[6][kMaxClusterPerLayer5]; // pointers to clusters - slice in y | |
133 | Float_t fY5[6][kMaxClusterPerLayer5]; // y position of the clusters slice in y | |
134 | Float_t fZ5[6][kMaxClusterPerLayer5]; // z position of the clusters slice in y | |
135 | Int_t fN5[6]; // number of cluster in slice | |
136 | Float_t fDy5; //delta y | |
137 | Float_t fBy5[6][2]; //slice borders | |
138 | // | |
139 | AliITSclusterV2 *fClusters10[11][kMaxClusterPerLayer10]; // pointers to clusters - slice in y | |
140 | Int_t fClusterIndex10[11][kMaxClusterPerLayer10]; // pointers to clusters - slice in y | |
141 | Float_t fY10[11][kMaxClusterPerLayer10]; // y position of the clusters slice in y | |
142 | Float_t fZ10[11][kMaxClusterPerLayer10]; // z position of the clusters slice in y | |
143 | Int_t fN10[11]; // number of cluster in slice | |
f43e383b | 144 | Float_t fDy10; // delta y |
145 | Float_t fBy10[11][2]; // slice borders | |
e43c066c | 146 | // |
147 | AliITSclusterV2 *fClusters20[21][kMaxClusterPerLayer20]; // pointers to clusters - slice in y | |
148 | Int_t fClusterIndex20[21][kMaxClusterPerLayer20]; // pointers to clusters - slice in y | |
149 | Float_t fY20[21][kMaxClusterPerLayer20]; // y position of the clusters slice in y | |
150 | Float_t fZ20[21][kMaxClusterPerLayer20]; // z position of the clusters slice in y | |
151 | Int_t fN20[21]; // number of cluster in slice | |
f43e383b | 152 | Float_t fDy20; //delta y |
153 | Float_t fBy20[21][2]; //slice borders | |
e43c066c | 154 | // |
155 | AliITSclusterV2** fClustersCs; //clusters table in current slice | |
156 | Int_t *fClusterIndexCs; //cluster index in current slice | |
157 | Float_t *fYcs; //y position in current slice | |
158 | Float_t *fZcs; //z position in current slice | |
159 | Int_t fNcs; //number of clusters in current slice | |
160 | Int_t fCurrentSlice; //current slice | |
161 | // | |
162 | Float_t fClusterWeight[kMaxClusterPerLayer]; // probabilistic weight of the cluster | |
163 | Int_t fClusterTracks[4][kMaxClusterPerLayer]; //tracks registered to given cluster | |
164 | Float_t fZmax; // edges | |
165 | Float_t fYmin; // of the | |
166 | Float_t fYmax; // "window" | |
167 | Int_t fI; // index of the current cluster within the "window" | |
168 | Int_t fImax; // index of the last cluster within the "window" | |
169 | Int_t fSkip; // indicates possibility to skip cluster | |
f43e383b | 170 | Int_t fAccepted; // accept indicator |
e43c066c | 171 | Double_t fRoad; // road defined by the cluster density |
172 | }; | |
173 | AliITStrackerMI::AliITSlayer & GetLayer(Int_t layer) const; | |
174 | AliITStrackerMI::AliITSdetector & GetDetector(Int_t layer, Int_t n) const {return GetLayer(layer).GetDetector(n); } | |
175 | ||
176 | protected: | |
81e97e0d | 177 | Int_t GetNearestLayer(const Double_t *xr) const; //get nearest upper layer close to the point xr |
178 | void FindV02(AliESD *event); //try to find V0 | |
67c1e979 | 179 | void RefitV02(AliESD *event); //try to refit V0's |
81e97e0d | 180 | void UpdateTPCV0(AliESD *event); //try to update, or reject TPC V0s |
e43c066c | 181 | void CookLabel(AliKalmanTrack *t,Float_t wrong) const; |
15dd636f | 182 | void CookLabel(AliITStrackMI *t,Float_t wrong) const; |
e43c066c | 183 | Double_t GetEffectiveThickness(Double_t y, Double_t z) const; |
81e97e0d | 184 | void FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain); |
e43c066c | 185 | void ResetBestTrack() { |
15dd636f | 186 | fBestTrack.~AliITStrackMI(); |
187 | new(&fBestTrack) AliITStrackMI(fTrackToFollow); | |
e43c066c | 188 | } |
15dd636f | 189 | void ResetTrackToFollow(const AliITStrackMI &t) { |
190 | fTrackToFollow.~AliITStrackMI(); | |
191 | new(&fTrackToFollow) AliITStrackMI(t); | |
e43c066c | 192 | } |
15dd636f | 193 | void CookdEdx(AliITStrackMI* track); |
194 | Double_t GetNormalizedChi2(AliITStrackMI * track, Int_t mode); | |
195 | Double_t GetTruncatedChi2(AliITStrackMI * track, Float_t fac); | |
196 | Double_t NormalizedChi2(AliITStrackMI * track, Int_t layer); | |
197 | Double_t GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack); | |
198 | Double_t GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2); | |
e43c066c | 199 | Double_t GetDeadZoneProbability(Double_t zpos, Double_t zerr); |
200 | ||
201 | Float_t *GetWeight(Int_t index); | |
15dd636f | 202 | void AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex); |
e43c066c | 203 | void SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode); |
15dd636f | 204 | AliITStrackMI * GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax); |
e43c066c | 205 | void GetBestHypothesysMIP(TObjArray &itsTracks); |
15dd636f | 206 | void RegisterClusterTracks(AliITStrackMI* track, Int_t id); |
207 | void UnRegisterClusterTracks(AliITStrackMI* track, Int_t id); | |
208 | Float_t GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6]); | |
209 | Int_t GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6], Int_t overlist[6]); | |
210 | AliITStrackMI * GetBest2Tracks(Int_t trackID1, Int_t treackID2, Float_t th0, Float_t th1); | |
e43c066c | 211 | Float_t * GetErrY(Int_t trackindex) const {return &fCoeficients[trackindex*48];} |
212 | Float_t * GetErrZ(Int_t trackindex) const {return &fCoeficients[trackindex*48+12];} | |
213 | Float_t * GetNy(Int_t trackindex) const {return &fCoeficients[trackindex*48+24];} | |
214 | Float_t * GetNz(Int_t trackindex) const {return &fCoeficients[trackindex*48+36];} | |
215 | void SignDeltas( TObjArray *ClusterArray, Float_t zv); | |
216 | void MakeCoeficients(Int_t ntracks); | |
15dd636f | 217 | void UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const; |
e43c066c | 218 | Int_t fI; // index of the current layer |
219 | static AliITSlayer fgLayers[kMaxLayer];// ITS layers | |
15dd636f | 220 | AliITStrackMI fTracks[kMaxLayer]; // track estimations at the ITS layers |
221 | AliITStrackMI fBestTrack; // "best" track | |
222 | AliITStrackMI fTrackToFollow; // followed track | |
e43c066c | 223 | TObjArray fTrackHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI |
81e97e0d | 224 | TObjArray fBestHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI |
628e7bb0 | 225 | TObjArray fOriginal; // ! array with seeds from the TPC |
e43c066c | 226 | Int_t fBestTrackIndex[100000]; // ! index of the best track |
227 | Int_t fCurrentEsdTrack; // ! current esd track - MI | |
228 | Int_t fPass; // current pass through the data | |
229 | Int_t fConstraint[2]; // constraint flags | |
628e7bb0 | 230 | Bool_t fAfterV0; //indicates V0 founded |
e43c066c | 231 | Int_t fLayersNotToSkip[kMaxLayer]; // layer masks |
232 | Int_t fLastLayerToTrackTo; // the innermost layer to track to | |
233 | Float_t * fCoeficients; //! working array with errors and mean cluser shape | |
81e97e0d | 234 | AliESD * fEsd; //! pointer to the ESD event |
235 | TTreeSRedirector *fDebugStreamer; //!debug streamer | |
bf6adc12 | 236 | private: |
237 | AliITStrackerMI(const AliITStrackerMI &); | |
238 | AliITStrackerMI & operator=(const AliITStrackerMI &); | |
15dd636f | 239 | ClassDef(AliITStrackerMI,2) //ITS tracker MI |
e43c066c | 240 | }; |
241 | ||
242 | ||
243 | ||
244 | ||
245 | ///////////////////////////////////////////////////////// | |
246 | ///////////////////////////////////////////////////////// | |
247 | ///////////////////////////////////////////////////////// | |
248 | ||
249 | ||
250 | ||
251 | ||
252 | ||
253 | inline void AliITStrackerMI::SetupFirstPass(Int_t *flags, Double_t *cuts) { | |
254 | // This function sets up flags and cuts for the first tracking pass | |
255 | // | |
256 | // flags[0] - vertex constaint flag | |
257 | // negative means "skip the pass" | |
258 | // 0 means "no constraint" | |
259 | // positive means "normal constraint" | |
260 | ||
261 | fConstraint[0]=flags[0]; | |
262 | if (cuts==0) return; | |
263 | } | |
264 | ||
265 | inline void AliITStrackerMI::SetupSecondPass(Int_t *flags, Double_t *cuts) { | |
266 | // This function sets up flags and cuts for the second tracking pass | |
267 | // | |
268 | // flags[0] - vertex constaint flag | |
269 | // negative means "skip the pass" | |
270 | // 0 means "no constraint" | |
271 | // positive means "normal constraint" | |
272 | ||
273 | fConstraint[1]=flags[0]; | |
274 | if (cuts==0) return; | |
275 | } | |
276 | ||
277 | inline void AliITStrackerMI::CookLabel(AliKalmanTrack *t,Float_t wrong) const { | |
278 | //-------------------------------------------------------------------- | |
279 | //This function "cooks" a track label. If label<0, this track is fake. | |
280 | //-------------------------------------------------------------------- | |
281 | Int_t tpcLabel=t->GetLabel(); | |
282 | if (tpcLabel<0) return; | |
283 | AliTracker::CookLabel(t,wrong); | |
284 | if (tpcLabel!=TMath::Abs(t->GetLabel())){ | |
285 | t->SetFakeRatio(1.); | |
286 | } | |
287 | if (tpcLabel !=t->GetLabel()) { | |
288 | t->SetLabel(-tpcLabel); | |
289 | } | |
290 | } | |
291 | ||
15dd636f | 292 | inline Double_t AliITStrackerMI::NormalizedChi2(AliITStrackMI * track, Int_t layer) |
e43c066c | 293 | { |
294 | //-------------------------------------------------------------------- | |
295 | //get normalize chi2 | |
296 | //-------------------------------------------------------------------- | |
297 | track->fNormChi2[layer] = 2.*track->fNSkipped+0.25*track->fNDeadZone+track->fdEdxMismatch+track->GetChi2()/ | |
298 | //track->fNormChi2[layer] = 2.*track->fNSkipped+0.25*track->fNDeadZone+track->fdEdxMismatch+track->fChi22/ | |
299 | TMath::Max(double(track->GetNumberOfClusters()-track->fNSkipped), | |
300 | 1./(1.+track->fNSkipped)); | |
301 | return track->fNormChi2[layer]; | |
302 | } | |
303 | inline void AliITStrackerMI::AliITSdetector::GetGlobalXYZ(const AliITSclusterV2 *cl, Double_t xyz[3]) const | |
304 | { | |
305 | // | |
306 | // get cluster coordinates in global cooordinate | |
307 | // | |
308 | xyz[2] = cl->GetZ(); | |
309 | xyz[0] = fR*fCosPhi - cl->GetY()*fSinPhi; | |
310 | xyz[1] = fR*fSinPhi + cl->GetY()*fCosPhi; | |
311 | } | |
312 | #endif |