]> git.uio.no Git - u/mrichter/AliRoot.git/blame - ITS/AliITStrackerMI.h
git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
update (alberto):
[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.h
CommitLineData
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 14class TTree;
15class TTreeSRedirector;
e43c066c 16class AliESD;
e43c066c 17class AliHelix;
bf6adc12 18class AliITSgeom;
67c1e979 19
00a7cc50 20#include <TObjArray.h>
21#include "AliITSRecPoint.h"
bf6adc12 22#include "AliITStrackMI.h"
23#include "AliTracker.h"
e43c066c 24
25//-------------------------------------------------------------------------
26class AliITStrackerMI : public AliTracker {
27public:
28 AliITStrackerMI():AliTracker(){}
29 AliITStrackerMI(const AliITSgeom *geom);
628e7bb0 30 ~AliITStrackerMI();
e43c066c 31 AliCluster *GetCluster(Int_t index) const;
df29e9a4 32 virtual Bool_t GetTrackPoint(Int_t index, AliTrackPoint& p) const;
00a7cc50 33 AliITSRecPoint *GetClusterLayer(Int_t layn, Int_t ncl) const
e43c066c 34 {return fgLayers[layn].GetCluster(ncl);}
35 Int_t GetNumberOfClustersLayer(Int_t layn) const
36 {return fgLayers[layn].GetNumberOfClusters();}
37 Int_t LoadClusters(TTree *cf);
38 void UnloadClusters();
e43c066c 39 Int_t Clusters2Tracks(AliESD *event);
40 Int_t PropagateBack(AliESD *event);
41 Int_t RefitInward(AliESD *event);
ef7253ac 42 Bool_t RefitAt(Double_t x, AliITStrackMI *seed,
43 const AliITStrackMI *t, Bool_t extra=kFALSE);
67c1e979 44 Bool_t RefitAt(Double_t x, AliITStrackMI *seed, const Int_t *clindex);
e43c066c 45 void SetupFirstPass(Int_t *flags, Double_t *cuts=0);
46 void SetupSecondPass(Int_t *flags, Double_t *cuts=0);
47
48 void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;}
49 void SetLayersNotToSkip(Int_t *l);
50 void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
00a7cc50 51 void GetNTeor(Int_t layer, const AliITSRecPoint* cl, Float_t theta, Float_t phi, Float_t &ny, Float_t &nz);
52 Int_t GetError(Int_t layer, const AliITSRecPoint*cl, Float_t theta, Float_t phi, Float_t expQ, Float_t &erry, Float_t &errz);
628e7bb0 53
54 void GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz);
00a7cc50 55 Double_t GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer);
56 Int_t UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t layer) const;
e43c066c 57 class AliITSdetector {
58 public:
59 AliITSdetector(){}
60 AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi; fSinPhi = TMath::Sin(phi); fCosPhi = TMath::Cos(phi);
61 fYmin=10000;fYmax=-1000; fZmin=10000;fZmax=-1000;}
00a7cc50 62 inline void GetGlobalXYZ( const AliITSRecPoint *cl, Double_t xyz[3]) const;
e43c066c 63 Double_t GetR() const {return fR;}
64 Double_t GetPhi() const {return fPhi;}
65 Double_t GetYmin() const {return fYmin;}
66 Double_t GetYmax() const {return fYmax;}
67 Double_t GetZmin() const {return fZmin;}
68 Double_t GetZmax() const {return fZmax;}
69 void SetYmin(Double_t min) {fYmin = min;}
70 void SetYmax(Double_t max) {fYmax = max;}
71 void SetZmin(Double_t min) {fZmin = min;}
72 void SetZmax(Double_t max) {fZmax = max;}
73 private:
74 Double_t fR; // polar coordinates
75 Double_t fPhi; // of this detector
76 Double_t fSinPhi; // sin of phi;
77 Double_t fCosPhi; // cos of phi
78 Double_t fYmin; // local y minimal
79 Double_t fYmax; // local max y
80 Double_t fZmin; // local z min
81 Double_t fZmax; // local z max
82 };
83
84 class AliITSlayer {
85 friend class AliITStrackerMI;
86 public:
87 AliITSlayer();
88 AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
89 ~AliITSlayer();
00a7cc50 90 Int_t InsertCluster(AliITSRecPoint *c);
e43c066c 91 void SortClusters();
92 void ResetClusters();
93 void ResetWeights();
94 void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
00a7cc50 95 const AliITSRecPoint *GetNextCluster(Int_t &ci);
e43c066c 96 void ResetRoad();
97 Double_t GetRoad() const {return fRoad;}
98 Double_t GetR() const {return fR;}
99 Int_t FindClusterIndex(Float_t z) const;
00a7cc50 100 AliITSRecPoint *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;}
bf6adc12 101 Float_t *GetWeight(Int_t i) {return i<fN ?&fClusterWeight[i]:0;}
e43c066c 102 AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
103 Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
104 Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
105 Int_t InRoad() const ;
106 Int_t GetNumberOfClusters() const {return fN;}
107 Int_t GetNladders() const {return fNladders;}
108 Int_t GetNdetectors() const {return fNdetectors;}
109 Int_t GetSkip() const {return fSkip;}
110 void SetSkip(Int_t skip){fSkip=skip;}
111 void IncAccepted(){fAccepted++;}
81e97e0d 112 Int_t GetAccepted() const {return fAccepted;}
e43c066c 113 protected:
bf6adc12 114 AliITSlayer(const AliITSlayer& /*layer*/);
115 AliITSlayer & operator=(const AliITSlayer& /*layer*/);
e43c066c 116 Double_t fR; // mean radius of this layer
117 Double_t fPhiOffset; // offset of the first detector in Phi
118 Int_t fNladders; // number of ladders
119 Double_t fZOffset; // offset of the first detector in Z
120 Int_t fNdetectors; // detectors/ladder
121 AliITSdetector *fDetectors; // array of detectors
122 Int_t fN; // number of clusters
00a7cc50 123 AliITSRecPoint *fClusters[kMaxClusterPerLayer]; // pointers to clusters
e43c066c 124 Int_t fClusterIndex[kMaxClusterPerLayer]; // pointers to clusters
125 Float_t fY[kMaxClusterPerLayer]; // y position of the clusters
126 Float_t fZ[kMaxClusterPerLayer]; // z position of the clusters
127 Float_t fYB[2]; // ymin and ymax
128 //
00a7cc50 129 AliITSRecPoint *fClusters5[6][kMaxClusterPerLayer5]; // pointers to clusters - slice in y
e43c066c 130 Int_t fClusterIndex5[6][kMaxClusterPerLayer5]; // pointers to clusters - slice in y
131 Float_t fY5[6][kMaxClusterPerLayer5]; // y position of the clusters slice in y
132 Float_t fZ5[6][kMaxClusterPerLayer5]; // z position of the clusters slice in y
133 Int_t fN5[6]; // number of cluster in slice
134 Float_t fDy5; //delta y
135 Float_t fBy5[6][2]; //slice borders
136 //
00a7cc50 137 AliITSRecPoint *fClusters10[11][kMaxClusterPerLayer10]; // pointers to clusters - slice in y
e43c066c 138 Int_t fClusterIndex10[11][kMaxClusterPerLayer10]; // pointers to clusters - slice in y
139 Float_t fY10[11][kMaxClusterPerLayer10]; // y position of the clusters slice in y
140 Float_t fZ10[11][kMaxClusterPerLayer10]; // z position of the clusters slice in y
141 Int_t fN10[11]; // number of cluster in slice
f43e383b 142 Float_t fDy10; // delta y
143 Float_t fBy10[11][2]; // slice borders
e43c066c 144 //
00a7cc50 145 AliITSRecPoint *fClusters20[21][kMaxClusterPerLayer20]; // pointers to clusters - slice in y
e43c066c 146 Int_t fClusterIndex20[21][kMaxClusterPerLayer20]; // pointers to clusters - slice in y
147 Float_t fY20[21][kMaxClusterPerLayer20]; // y position of the clusters slice in y
148 Float_t fZ20[21][kMaxClusterPerLayer20]; // z position of the clusters slice in y
149 Int_t fN20[21]; // number of cluster in slice
f43e383b 150 Float_t fDy20; //delta y
151 Float_t fBy20[21][2]; //slice borders
e43c066c 152 //
00a7cc50 153 AliITSRecPoint** fClustersCs; //clusters table in current slice
e43c066c 154 Int_t *fClusterIndexCs; //cluster index in current slice
155 Float_t *fYcs; //y position in current slice
156 Float_t *fZcs; //z position in current slice
157 Int_t fNcs; //number of clusters in current slice
158 Int_t fCurrentSlice; //current slice
159 //
160 Float_t fClusterWeight[kMaxClusterPerLayer]; // probabilistic weight of the cluster
161 Int_t fClusterTracks[4][kMaxClusterPerLayer]; //tracks registered to given cluster
162 Float_t fZmax; // edges
163 Float_t fYmin; // of the
164 Float_t fYmax; // "window"
165 Int_t fI; // index of the current cluster within the "window"
166 Int_t fImax; // index of the last cluster within the "window"
167 Int_t fSkip; // indicates possibility to skip cluster
f43e383b 168 Int_t fAccepted; // accept indicator
e43c066c 169 Double_t fRoad; // road defined by the cluster density
170 };
171 AliITStrackerMI::AliITSlayer & GetLayer(Int_t layer) const;
172 AliITStrackerMI::AliITSdetector & GetDetector(Int_t layer, Int_t n) const {return GetLayer(layer).GetDetector(n); }
173
174protected:
81e97e0d 175 Int_t GetNearestLayer(const Double_t *xr) const; //get nearest upper layer close to the point xr
176 void FindV02(AliESD *event); //try to find V0
67c1e979 177 void RefitV02(AliESD *event); //try to refit V0's
81e97e0d 178 void UpdateTPCV0(AliESD *event); //try to update, or reject TPC V0s
e43c066c 179 void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
15dd636f 180 void CookLabel(AliITStrackMI *t,Float_t wrong) const;
e43c066c 181 Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
81e97e0d 182 void FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain);
e43c066c 183 void ResetBestTrack() {
15dd636f 184 fBestTrack.~AliITStrackMI();
185 new(&fBestTrack) AliITStrackMI(fTrackToFollow);
e43c066c 186 }
15dd636f 187 void ResetTrackToFollow(const AliITStrackMI &t) {
188 fTrackToFollow.~AliITStrackMI();
189 new(&fTrackToFollow) AliITStrackMI(t);
e43c066c 190 }
15dd636f 191 void CookdEdx(AliITStrackMI* track);
192 Double_t GetNormalizedChi2(AliITStrackMI * track, Int_t mode);
193 Double_t GetTruncatedChi2(AliITStrackMI * track, Float_t fac);
194 Double_t NormalizedChi2(AliITStrackMI * track, Int_t layer);
195 Double_t GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack);
196 Double_t GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2);
e43c066c 197 Double_t GetDeadZoneProbability(Double_t zpos, Double_t zerr);
198
199 Float_t *GetWeight(Int_t index);
15dd636f 200 void AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex);
e43c066c 201 void SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode);
15dd636f 202 AliITStrackMI * GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax);
e43c066c 203 void GetBestHypothesysMIP(TObjArray &itsTracks);
15dd636f 204 void RegisterClusterTracks(AliITStrackMI* track, Int_t id);
205 void UnRegisterClusterTracks(AliITStrackMI* track, Int_t id);
00a7cc50 206 Float_t GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6]);
15dd636f 207 Int_t GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6], Int_t overlist[6]);
208 AliITStrackMI * GetBest2Tracks(Int_t trackID1, Int_t treackID2, Float_t th0, Float_t th1);
e43c066c 209 Float_t * GetErrY(Int_t trackindex) const {return &fCoeficients[trackindex*48];}
210 Float_t * GetErrZ(Int_t trackindex) const {return &fCoeficients[trackindex*48+12];}
211 Float_t * GetNy(Int_t trackindex) const {return &fCoeficients[trackindex*48+24];}
212 Float_t * GetNz(Int_t trackindex) const {return &fCoeficients[trackindex*48+36];}
213 void SignDeltas( TObjArray *ClusterArray, Float_t zv);
214 void MakeCoeficients(Int_t ntracks);
15dd636f 215 void UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const;
e43c066c 216 Int_t fI; // index of the current layer
217 static AliITSlayer fgLayers[kMaxLayer];// ITS layers
15dd636f 218 AliITStrackMI fTracks[kMaxLayer]; // track estimations at the ITS layers
219 AliITStrackMI fBestTrack; // "best" track
220 AliITStrackMI fTrackToFollow; // followed track
e43c066c 221 TObjArray fTrackHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
81e97e0d 222 TObjArray fBestHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
628e7bb0 223 TObjArray fOriginal; // ! array with seeds from the TPC
e43c066c 224 Int_t fBestTrackIndex[100000]; // ! index of the best track
225 Int_t fCurrentEsdTrack; // ! current esd track - MI
226 Int_t fPass; // current pass through the data
227 Int_t fConstraint[2]; // constraint flags
628e7bb0 228 Bool_t fAfterV0; //indicates V0 founded
e43c066c 229 Int_t fLayersNotToSkip[kMaxLayer]; // layer masks
230 Int_t fLastLayerToTrackTo; // the innermost layer to track to
231 Float_t * fCoeficients; //! working array with errors and mean cluser shape
81e97e0d 232 AliESD * fEsd; //! pointer to the ESD event
233 TTreeSRedirector *fDebugStreamer; //!debug streamer
bf6adc12 234private:
235 AliITStrackerMI(const AliITStrackerMI &);
236 AliITStrackerMI & operator=(const AliITStrackerMI &);
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}
00a7cc50 301inline void AliITStrackerMI::AliITSdetector::GetGlobalXYZ(const AliITSRecPoint *cl, Double_t xyz[3]) const
e43c066c 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