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[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.h
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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
6//-------------------------------------------------------------------------
7// ITS tracker
15dd636f 8// reads AliITSclusterMI clusters and creates AliITStrackMI tracks
9// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
e43c066c 10//-------------------------------------------------------------------------
11
12#include <TObjArray.h>
13
14#include "AliTracker.h"
15dd636f 15#include "AliITStrackMI.h"
e43c066c 16#include "AliITSclusterV2.h"
51ad6848 17#include "AliV0vertex.h"
e43c066c 18
e43c066c 19class AliESD;
20class AliITSgeom;
21class TTree;
22class AliHelix;
23class AliV0vertex;
51ad6848 24class AliESDV0MI;
e43c066c 25
81e97e0d 26class TTreeSRedirector;
27
e43c066c 28
29
30
31//-------------------------------------------------------------------------
32class AliITStrackerMI : public AliTracker {
33public:
34 AliITStrackerMI():AliTracker(){}
35 AliITStrackerMI(const AliITSgeom *geom);
628e7bb0 36 ~AliITStrackerMI();
e43c066c 37 AliCluster *GetCluster(Int_t index) const;
38 AliITSclusterV2 *GetClusterLayer(Int_t layn, Int_t ncl) const
39 {return fgLayers[layn].GetCluster(ncl);}
40 Int_t GetNumberOfClustersLayer(Int_t layn) const
41 {return fgLayers[layn].GetNumberOfClusters();}
42 Int_t LoadClusters(TTree *cf);
43 void UnloadClusters();
e43c066c 44 Int_t Clusters2Tracks(AliESD *event);
45 Int_t PropagateBack(AliESD *event);
46 Int_t RefitInward(AliESD *event);
15dd636f 47 Bool_t RefitAt(Double_t x, AliITStrackMI *seed, const AliITStrackMI *t);
e43c066c 48 void SetupFirstPass(Int_t *flags, Double_t *cuts=0);
49 void SetupSecondPass(Int_t *flags, Double_t *cuts=0);
50
51 void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;}
52 void SetLayersNotToSkip(Int_t *l);
53 void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
54 void GetNTeor(Int_t layer, const AliITSclusterV2* cl, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz);
55 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 56
57 void GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz);
15dd636f 58 Double_t GetPredictedChi2MI(AliITStrackMI* track, const AliITSclusterV2 *cluster,Int_t layer);
59 Int_t UpdateMI(AliITStrackMI* track, const AliITSclusterV2* cl,Double_t chi2,Int_t layer) const;
e43c066c 60 class AliITSdetector {
61 public:
62 AliITSdetector(){}
63 AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi; fSinPhi = TMath::Sin(phi); fCosPhi = TMath::Cos(phi);
64 fYmin=10000;fYmax=-1000; fZmin=10000;fZmax=-1000;}
65 inline void GetGlobalXYZ( const AliITSclusterV2 *cl, Double_t xyz[3]) const;
66 Double_t GetR() const {return fR;}
67 Double_t GetPhi() const {return fPhi;}
68 Double_t GetYmin() const {return fYmin;}
69 Double_t GetYmax() const {return fYmax;}
70 Double_t GetZmin() const {return fZmin;}
71 Double_t GetZmax() const {return fZmax;}
72 void SetYmin(Double_t min) {fYmin = min;}
73 void SetYmax(Double_t max) {fYmax = max;}
74 void SetZmin(Double_t min) {fZmin = min;}
75 void SetZmax(Double_t max) {fZmax = max;}
76 private:
77 Double_t fR; // polar coordinates
78 Double_t fPhi; // of this detector
79 Double_t fSinPhi; // sin of phi;
80 Double_t fCosPhi; // cos of phi
81 Double_t fYmin; // local y minimal
82 Double_t fYmax; // local max y
83 Double_t fZmin; // local z min
84 Double_t fZmax; // local z max
85 };
86
87 class AliITSlayer {
88 friend class AliITStrackerMI;
89 public:
90 AliITSlayer();
91 AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
92 ~AliITSlayer();
93 Int_t InsertCluster(AliITSclusterV2 *c);
94 void SortClusters();
95 void ResetClusters();
96 void ResetWeights();
97 void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
98 const AliITSclusterV2 *GetNextCluster(Int_t &ci);
99 void ResetRoad();
100 Double_t GetRoad() const {return fRoad;}
101 Double_t GetR() const {return fR;}
102 Int_t FindClusterIndex(Float_t z) const;
103 AliITSclusterV2 *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;}
f43e383b 104 Float_t *GetWeight(Int_t i) {return i<fN ?&fClusterWeight[i]:0;}
e43c066c 105 AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
106 Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
107 Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
108 Int_t InRoad() const ;
109 Int_t GetNumberOfClusters() const {return fN;}
110 Int_t GetNladders() const {return fNladders;}
111 Int_t GetNdetectors() const {return fNdetectors;}
112 Int_t GetSkip() const {return fSkip;}
113 void SetSkip(Int_t skip){fSkip=skip;}
114 void IncAccepted(){fAccepted++;}
81e97e0d 115 Int_t GetAccepted() const {return fAccepted;}
e43c066c 116 protected:
65780d25 117 AliITSlayer(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
176protected:
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
179 void UpdateTPCV0(AliESD *event); //try to update, or reject TPC V0s
e43c066c 180 void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
15dd636f 181 void CookLabel(AliITStrackMI *t,Float_t wrong) const;
e43c066c 182 Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
81e97e0d 183 void FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain);
e43c066c 184 void ResetBestTrack() {
15dd636f 185 fBestTrack.~AliITStrackMI();
186 new(&fBestTrack) AliITStrackMI(fTrackToFollow);
e43c066c 187 }
15dd636f 188 void ResetTrackToFollow(const AliITStrackMI &t) {
189 fTrackToFollow.~AliITStrackMI();
190 new(&fTrackToFollow) AliITStrackMI(t);
e43c066c 191 }
15dd636f 192 void CookdEdx(AliITStrackMI* track);
193 Double_t GetNormalizedChi2(AliITStrackMI * track, Int_t mode);
194 Double_t GetTruncatedChi2(AliITStrackMI * track, Float_t fac);
195 Double_t NormalizedChi2(AliITStrackMI * track, Int_t layer);
196 Double_t GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack);
197 Double_t GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2);
e43c066c 198 Double_t GetDeadZoneProbability(Double_t zpos, Double_t zerr);
199
200 Float_t *GetWeight(Int_t index);
15dd636f 201 void AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex);
e43c066c 202 void SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode);
15dd636f 203 AliITStrackMI * GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax);
e43c066c 204 void GetBestHypothesysMIP(TObjArray &itsTracks);
15dd636f 205 void RegisterClusterTracks(AliITStrackMI* track, Int_t id);
206 void UnRegisterClusterTracks(AliITStrackMI* track, Int_t id);
207 Float_t GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSclusterV2 *clist[6]);
208 Int_t GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6], Int_t overlist[6]);
209 AliITStrackMI * GetBest2Tracks(Int_t trackID1, Int_t treackID2, Float_t th0, Float_t th1);
e43c066c 210 Float_t * GetErrY(Int_t trackindex) const {return &fCoeficients[trackindex*48];}
211 Float_t * GetErrZ(Int_t trackindex) const {return &fCoeficients[trackindex*48+12];}
212 Float_t * GetNy(Int_t trackindex) const {return &fCoeficients[trackindex*48+24];}
213 Float_t * GetNz(Int_t trackindex) const {return &fCoeficients[trackindex*48+36];}
214 void SignDeltas( TObjArray *ClusterArray, Float_t zv);
215 void MakeCoeficients(Int_t ntracks);
15dd636f 216 void UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const;
e43c066c 217 Int_t fI; // index of the current layer
218 static AliITSlayer fgLayers[kMaxLayer];// ITS layers
15dd636f 219 AliITStrackMI fTracks[kMaxLayer]; // track estimations at the ITS layers
220 AliITStrackMI fBestTrack; // "best" track
221 AliITStrackMI fTrackToFollow; // followed track
e43c066c 222 TObjArray fTrackHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
81e97e0d 223 TObjArray fBestHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
628e7bb0 224 TObjArray fOriginal; // ! array with seeds from the TPC
e43c066c 225 Int_t fBestTrackIndex[100000]; // ! index of the best track
226 Int_t fCurrentEsdTrack; // ! current esd track - MI
227 Int_t fPass; // current pass through the data
228 Int_t fConstraint[2]; // constraint flags
628e7bb0 229 Bool_t fAfterV0; //indicates V0 founded
e43c066c 230 Int_t fLayersNotToSkip[kMaxLayer]; // layer masks
231 Int_t fLastLayerToTrackTo; // the innermost layer to track to
232 Float_t * fCoeficients; //! working array with errors and mean cluser shape
81e97e0d 233 AliESD * fEsd; //! pointer to the ESD event
234 TTreeSRedirector *fDebugStreamer; //!debug streamer
f43e383b 235 private:
65780d25 236 AliITStrackerMI(const AliITStrackerMI * /*tracker*/){;}
15dd636f 237 ClassDef(AliITStrackerMI,2) //ITS tracker MI
e43c066c 238};
239
240
241
242
243/////////////////////////////////////////////////////////
244/////////////////////////////////////////////////////////
245/////////////////////////////////////////////////////////
246
247
248
249
250
251inline void AliITStrackerMI::SetupFirstPass(Int_t *flags, Double_t *cuts) {
252 // This function sets up flags and cuts for the first tracking pass
253 //
254 // flags[0] - vertex constaint flag
255 // negative means "skip the pass"
256 // 0 means "no constraint"
257 // positive means "normal constraint"
258
259 fConstraint[0]=flags[0];
260 if (cuts==0) return;
261}
262
263inline void AliITStrackerMI::SetupSecondPass(Int_t *flags, Double_t *cuts) {
264 // This function sets up flags and cuts for the second tracking pass
265 //
266 // flags[0] - vertex constaint flag
267 // negative means "skip the pass"
268 // 0 means "no constraint"
269 // positive means "normal constraint"
270
271 fConstraint[1]=flags[0];
272 if (cuts==0) return;
273}
274
275inline void AliITStrackerMI::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
276 //--------------------------------------------------------------------
277 //This function "cooks" a track label. If label<0, this track is fake.
278 //--------------------------------------------------------------------
279 Int_t tpcLabel=t->GetLabel();
280 if (tpcLabel<0) return;
281 AliTracker::CookLabel(t,wrong);
282 if (tpcLabel!=TMath::Abs(t->GetLabel())){
283 t->SetFakeRatio(1.);
284 }
285 if (tpcLabel !=t->GetLabel()) {
286 t->SetLabel(-tpcLabel);
287 }
288}
289
15dd636f 290inline Double_t AliITStrackerMI::NormalizedChi2(AliITStrackMI * track, Int_t layer)
e43c066c 291{
292 //--------------------------------------------------------------------
293 //get normalize chi2
294 //--------------------------------------------------------------------
295 track->fNormChi2[layer] = 2.*track->fNSkipped+0.25*track->fNDeadZone+track->fdEdxMismatch+track->GetChi2()/
296 //track->fNormChi2[layer] = 2.*track->fNSkipped+0.25*track->fNDeadZone+track->fdEdxMismatch+track->fChi22/
297 TMath::Max(double(track->GetNumberOfClusters()-track->fNSkipped),
298 1./(1.+track->fNSkipped));
299 return track->fNormChi2[layer];
300}
301inline void AliITStrackerMI::AliITSdetector::GetGlobalXYZ(const AliITSclusterV2 *cl, Double_t xyz[3]) const
302{
303 //
304 // get cluster coordinates in global cooordinate
305 //
306 xyz[2] = cl->GetZ();
307 xyz[0] = fR*fCosPhi - cl->GetY()*fSinPhi;
308 xyz[1] = fR*fSinPhi + cl->GetY()*fCosPhi;
309}
310#endif