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[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.h
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e43c066c 1#ifndef ALIITSTRACKERMI_H
2#define ALIITSTRACKERMI_H
572f41f9 3/* Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
e43c066c 4 * See cxx source for full Copyright notice */
5
572f41f9 6/* $Id$ */
bf6adc12 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;
af885e0f 16class AliESDEvent;
67c1e979 17
00a7cc50 18#include <TObjArray.h>
19#include "AliITSRecPoint.h"
bf6adc12 20#include "AliITStrackMI.h"
21#include "AliTracker.h"
4a66240a 22#include "AliITSPlaneEff.h"
e43c066c 23
24//-------------------------------------------------------------------------
25class AliITStrackerMI : public AliTracker {
26public:
8221b41b 27 AliITStrackerMI();
1f3e997f 28 AliITStrackerMI(const Char_t *geom);
8221b41b 29 virtual ~AliITStrackerMI();
e43c066c 30 AliCluster *GetCluster(Int_t index) const;
df29e9a4 31 virtual Bool_t GetTrackPoint(Int_t index, AliTrackPoint& p) const;
9a5326b1 32 virtual Bool_t GetTrackPointTrackingError(Int_t index,
33 AliTrackPoint& p, const AliESDtrack *t);
00a7cc50 34 AliITSRecPoint *GetClusterLayer(Int_t layn, Int_t ncl) const
e43c066c 35 {return fgLayers[layn].GetCluster(ncl);}
36 Int_t GetNumberOfClustersLayer(Int_t layn) const
37 {return fgLayers[layn].GetNumberOfClusters();}
38 Int_t LoadClusters(TTree *cf);
39 void UnloadClusters();
af885e0f 40 Int_t Clusters2Tracks(AliESDEvent *event);
41 Int_t PropagateBack(AliESDEvent *event);
42 Int_t RefitInward(AliESDEvent *event);
ef7253ac 43 Bool_t RefitAt(Double_t x, AliITStrackMI *seed,
44 const AliITStrackMI *t, Bool_t extra=kFALSE);
67c1e979 45 Bool_t RefitAt(Double_t x, AliITStrackMI *seed, const Int_t *clindex);
e43c066c 46 void SetupFirstPass(Int_t *flags, Double_t *cuts=0);
47 void SetupSecondPass(Int_t *flags, Double_t *cuts=0);
48
49 void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;}
50 void SetLayersNotToSkip(Int_t *l);
51 void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
628e7bb0 52
53 void GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz);
00a7cc50 54 Double_t GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer);
55 Int_t UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t layer) const;
e43c066c 56 class AliITSdetector {
57 public:
8221b41b 58 AliITSdetector():fR(0),fPhi(0),fSinPhi(0),fCosPhi(0),fYmin(0),fYmax(0),fZmin(0),fZmax(0){}
59 AliITSdetector(Double_t r,Double_t phi):fR(r),fPhi(phi),fSinPhi(TMath::Sin(phi)),fCosPhi(TMath::Cos(phi)),fYmin(10000),fYmax(-1000),fZmin(10000),fZmax(-1000) {}
00a7cc50 60 inline void GetGlobalXYZ( const AliITSRecPoint *cl, Double_t xyz[3]) const;
e43c066c 61 Double_t GetR() const {return fR;}
62 Double_t GetPhi() const {return fPhi;}
63 Double_t GetYmin() const {return fYmin;}
64 Double_t GetYmax() const {return fYmax;}
65 Double_t GetZmin() const {return fZmin;}
66 Double_t GetZmax() const {return fZmax;}
67 void SetYmin(Double_t min) {fYmin = min;}
68 void SetYmax(Double_t max) {fYmax = max;}
69 void SetZmin(Double_t min) {fZmin = min;}
70 void SetZmax(Double_t max) {fZmax = max;}
71 private:
72 Double_t fR; // polar coordinates
73 Double_t fPhi; // of this detector
74 Double_t fSinPhi; // sin of phi;
75 Double_t fCosPhi; // cos of phi
76 Double_t fYmin; // local y minimal
77 Double_t fYmax; // local max y
78 Double_t fZmin; // local z min
79 Double_t fZmax; // local z max
80 };
81
82 class AliITSlayer {
e43c066c 83 public:
84 AliITSlayer();
85 AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
86 ~AliITSlayer();
00a7cc50 87 Int_t InsertCluster(AliITSRecPoint *c);
e43c066c 88 void SortClusters();
89 void ResetClusters();
90 void ResetWeights();
6518a6c5 91 void SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin,Double_t ymax);
00a7cc50 92 const AliITSRecPoint *GetNextCluster(Int_t &ci);
e43c066c 93 void ResetRoad();
94 Double_t GetRoad() const {return fRoad;}
95 Double_t GetR() const {return fR;}
96 Int_t FindClusterIndex(Float_t z) const;
00a7cc50 97 AliITSRecPoint *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;}
8602c008 98 Float_t *GetWeight(Int_t i) {return i<fN ?&fClusterWeight[i]:0;}
e43c066c 99 AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
100 Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
101 Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
102 Int_t InRoad() const ;
103 Int_t GetNumberOfClusters() const {return fN;}
104 Int_t GetNladders() const {return fNladders;}
105 Int_t GetNdetectors() const {return fNdetectors;}
106 Int_t GetSkip() const {return fSkip;}
107 void SetSkip(Int_t skip){fSkip=skip;}
108 void IncAccepted(){fAccepted++;}
81e97e0d 109 Int_t GetAccepted() const {return fAccepted;}
b9671574 110 Int_t GetClusterTracks(Int_t i, Int_t j) const {return fClusterTracks[i][j];}
111 void SetClusterTracks(Int_t i, Int_t j, Int_t c) {fClusterTracks[i][j]=c;}
e43c066c 112 protected:
8221b41b 113 AliITSlayer(const AliITSlayer& layer);
114 AliITSlayer & operator=(const AliITSlayer& layer){
115 this->~AliITSlayer();new(this) AliITSlayer(layer);
116 return *this;}
e43c066c 117 Double_t fR; // mean radius of this layer
118 Double_t fPhiOffset; // offset of the first detector in Phi
119 Int_t fNladders; // number of ladders
120 Double_t fZOffset; // offset of the first detector in Z
121 Int_t fNdetectors; // detectors/ladder
122 AliITSdetector *fDetectors; // array of detectors
123 Int_t fN; // number of clusters
e50912db 124 AliITSRecPoint *fClusters[AliITSRecoParam::fgkMaxClusterPerLayer]; // pointers to clusters
125 Int_t fClusterIndex[AliITSRecoParam::fgkMaxClusterPerLayer]; // pointers to clusters
126 Float_t fY[AliITSRecoParam::fgkMaxClusterPerLayer]; // y position of the clusters
127 Float_t fZ[AliITSRecoParam::fgkMaxClusterPerLayer]; // z position of the clusters
e43c066c 128 Float_t fYB[2]; // ymin and ymax
129 //
e50912db 130 AliITSRecPoint *fClusters5[6][AliITSRecoParam::fgkMaxClusterPerLayer5]; // pointers to clusters - slice in y
131 Int_t fClusterIndex5[6][AliITSRecoParam::fgkMaxClusterPerLayer5]; // pointers to clusters - slice in y
132 Float_t fY5[6][AliITSRecoParam::fgkMaxClusterPerLayer5]; // y position of the clusters slice in y
133 Float_t fZ5[6][AliITSRecoParam::fgkMaxClusterPerLayer5]; // z position of the clusters slice in y
e43c066c 134 Int_t fN5[6]; // number of cluster in slice
135 Float_t fDy5; //delta y
136 Float_t fBy5[6][2]; //slice borders
137 //
e50912db 138 AliITSRecPoint *fClusters10[11][AliITSRecoParam::fgkMaxClusterPerLayer10]; // pointers to clusters - slice in y
139 Int_t fClusterIndex10[11][AliITSRecoParam::fgkMaxClusterPerLayer10]; // pointers to clusters - slice in y
140 Float_t fY10[11][AliITSRecoParam::fgkMaxClusterPerLayer10]; // y position of the clusters slice in y
141 Float_t fZ10[11][AliITSRecoParam::fgkMaxClusterPerLayer10]; // z position of the clusters slice in y
e43c066c 142 Int_t fN10[11]; // number of cluster in slice
f43e383b 143 Float_t fDy10; // delta y
144 Float_t fBy10[11][2]; // slice borders
e43c066c 145 //
e50912db 146 AliITSRecPoint *fClusters20[21][AliITSRecoParam::fgkMaxClusterPerLayer20]; // pointers to clusters - slice in y
147 Int_t fClusterIndex20[21][AliITSRecoParam::fgkMaxClusterPerLayer20]; // pointers to clusters - slice in y
148 Float_t fY20[21][AliITSRecoParam::fgkMaxClusterPerLayer20]; // y position of the clusters slice in y
149 Float_t fZ20[21][AliITSRecoParam::fgkMaxClusterPerLayer20]; // z position of the clusters slice in y
e43c066c 150 Int_t fN20[21]; // number of cluster in slice
f43e383b 151 Float_t fDy20; //delta y
152 Float_t fBy20[21][2]; //slice borders
e43c066c 153 //
00a7cc50 154 AliITSRecPoint** fClustersCs; //clusters table in current slice
e43c066c 155 Int_t *fClusterIndexCs; //cluster index in current slice
156 Float_t *fYcs; //y position in current slice
157 Float_t *fZcs; //z position in current slice
158 Int_t fNcs; //number of clusters in current slice
159 Int_t fCurrentSlice; //current slice
160 //
e50912db 161 Float_t fClusterWeight[AliITSRecoParam::fgkMaxClusterPerLayer]; // probabilistic weight of the cluster
162 Int_t fClusterTracks[4][AliITSRecoParam::fgkMaxClusterPerLayer]; //tracks registered to given cluster
e43c066c 163 Float_t fZmax; // edges
164 Float_t fYmin; // of the
165 Float_t fYmax; // "window"
166 Int_t fI; // index of the current cluster within the "window"
167 Int_t fImax; // index of the last cluster within the "window"
168 Int_t fSkip; // indicates possibility to skip cluster
f43e383b 169 Int_t fAccepted; // accept indicator
e43c066c 170 Double_t fRoad; // road defined by the cluster density
171 };
172 AliITStrackerMI::AliITSlayer & GetLayer(Int_t layer) const;
173 AliITStrackerMI::AliITSdetector & GetDetector(Int_t layer, Int_t n) const {return GetLayer(layer).GetDetector(n); }
174
175protected:
81e97e0d 176 Int_t GetNearestLayer(const Double_t *xr) const; //get nearest upper layer close to the point xr
af885e0f 177 void FindV02(AliESDEvent *event); //try to find V0
178 void RefitV02(AliESDEvent *event); //try to refit V0's
179 void UpdateTPCV0(AliESDEvent *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;
e50912db 182 Double_t GetEffectiveThickness();
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);
6518a6c5 198 Double_t GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr);
e43c066c 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);
00a7cc50 207 Float_t GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6]);
15dd636f 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);
afd25725 210 Float_t * GetErrY(Int_t trackindex) const {return &fCoefficients[trackindex*48];}
211 Float_t * GetErrZ(Int_t trackindex) const {return &fCoefficients[trackindex*48+12];}
212 Float_t * GetNy(Int_t trackindex) const {return &fCoefficients[trackindex*48+24];}
213 Float_t * GetNz(Int_t trackindex) const {return &fCoefficients[trackindex*48+36];}
e43c066c 214 void SignDeltas( TObjArray *ClusterArray, Float_t zv);
afd25725 215 void MakeCoefficients(Int_t ntracks);
e50912db 216 void BuildMaterialLUT(TString material);
217 void MakeTrksMaterialLUT(Int_t ntracks);
218 void DeleteTrksMaterialLUT();
219 Int_t CorrectForPipeMaterial(AliITStrackMI *t, TString direction="inward");
220 Int_t CorrectForShieldMaterial(AliITStrackMI *t, TString shield, TString direction="inward");
221 Int_t CorrectForLayerMaterial(AliITStrackMI *t, Int_t layerindex, Double_t oldGlobXYZ[3], TString direction="inward");
15dd636f 222 void UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const;
6518a6c5 223 Int_t CheckSkipLayer(AliITStrackMI *track,Int_t ilayer,Int_t idet) const;
224 Int_t CheckDeadZone(/*AliITStrackMI *track,*/Int_t ilayer,/*Int_t idet,*/Double_t zmin,Double_t zmax/*,Double_t ymin,Double_t ymax*/) const;
e43c066c 225 Int_t fI; // index of the current layer
e50912db 226 static AliITSlayer fgLayers[AliITSgeomTGeo::kNLayers];// ITS layers
227 AliITStrackMI fTracks[AliITSgeomTGeo::kNLayers]; // track estimations at the ITS layers
15dd636f 228 AliITStrackMI fBestTrack; // "best" track
229 AliITStrackMI fTrackToFollow; // followed track
e43c066c 230 TObjArray fTrackHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
81e97e0d 231 TObjArray fBestHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
628e7bb0 232 TObjArray fOriginal; // ! array with seeds from the TPC
e43c066c 233 Int_t fBestTrackIndex[100000]; // ! index of the best track
234 Int_t fCurrentEsdTrack; // ! current esd track - MI
235 Int_t fPass; // current pass through the data
236 Int_t fConstraint[2]; // constraint flags
628e7bb0 237 Bool_t fAfterV0; //indicates V0 founded
e50912db 238 Int_t fLayersNotToSkip[AliITSgeomTGeo::kNLayers]; // layer masks
e43c066c 239 Int_t fLastLayerToTrackTo; // the innermost layer to track to
e50912db 240 Float_t * fCoefficients; //! working array with errors and mean cluster shape
afd25725 241 AliESDEvent * fEsd; //! pointer to the ESD event
242 Double_t fSPDdetzcentre[4]; // centres of SPD modules in z
e50912db 243 TString fTrackingPhase; // current tracking phase
244 Int_t fUseTGeo; // use TGeo to get material budget
245 Int_t fNtracks; // number of tracks to prolong
246 Float_t fxOverX0Pipe; // material budget
247 Float_t fxTimesRhoPipe; // material budget
248 Float_t fxOverX0Shield[2]; // material budget
249 Float_t fxTimesRhoShield[2]; // material budget
250 Float_t fxOverX0Layer[6]; // material budget
251 Float_t fxTimesRhoLayer[6]; // material budget
252 Float_t *fxOverX0PipeTrks; //! material budget
253 Float_t *fxTimesRhoPipeTrks; //! material budget
254 Float_t *fxOverX0ShieldTrks; //! material budget
255 Float_t *fxTimesRhoShieldTrks; //! material budget
256 Float_t *fxOverX0LayerTrks; //! material budget
257 Float_t *fxTimesRhoLayerTrks; //! material budget
258 TTreeSRedirector *fDebugStreamer; //!debug streamer
4a66240a 259//
260 AliITSPlaneEff *fPlaneEff; //| Pointer to the ITS plane efficicency
bf6adc12 261private:
8221b41b 262 AliITStrackerMI(const AliITStrackerMI &tracker);
263 AliITStrackerMI & operator=(const AliITStrackerMI &tracker);
e50912db 264 ClassDef(AliITStrackerMI,4) //ITS tracker MI
e43c066c 265};
266
267
268
269
4a66240a 270
271
e43c066c 272/////////////////////////////////////////////////////////
273/////////////////////////////////////////////////////////
274/////////////////////////////////////////////////////////
275
276
277
278
279
280inline void AliITStrackerMI::SetupFirstPass(Int_t *flags, Double_t *cuts) {
281 // This function sets up flags and cuts for the first tracking pass
282 //
283 // flags[0] - vertex constaint flag
284 // negative means "skip the pass"
285 // 0 means "no constraint"
286 // positive means "normal constraint"
287
288 fConstraint[0]=flags[0];
289 if (cuts==0) return;
290}
291
292inline void AliITStrackerMI::SetupSecondPass(Int_t *flags, Double_t *cuts) {
293 // This function sets up flags and cuts for the second tracking pass
294 //
295 // flags[0] - vertex constaint flag
296 // negative means "skip the pass"
297 // 0 means "no constraint"
298 // positive means "normal constraint"
299
300 fConstraint[1]=flags[0];
301 if (cuts==0) return;
302}
303
304inline void AliITStrackerMI::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
305 //--------------------------------------------------------------------
306 //This function "cooks" a track label. If label<0, this track is fake.
307 //--------------------------------------------------------------------
308 Int_t tpcLabel=t->GetLabel();
309 if (tpcLabel<0) return;
310 AliTracker::CookLabel(t,wrong);
311 if (tpcLabel!=TMath::Abs(t->GetLabel())){
312 t->SetFakeRatio(1.);
313 }
314 if (tpcLabel !=t->GetLabel()) {
315 t->SetLabel(-tpcLabel);
316 }
317}
318
15dd636f 319inline Double_t AliITStrackerMI::NormalizedChi2(AliITStrackMI * track, Int_t layer)
e43c066c 320{
321 //--------------------------------------------------------------------
322 //get normalize chi2
323 //--------------------------------------------------------------------
b9671574 324 track->SetNormChi2(layer,2.*track->GetNSkipped()+0.25*track->GetNDeadZone()+track->GetdEdxMismatch()+track->GetChi2()/
e43c066c 325 //track->fNormChi2[layer] = 2.*track->fNSkipped+0.25*track->fNDeadZone+track->fdEdxMismatch+track->fChi22/
b9671574 326 TMath::Max(double(track->GetNumberOfClusters()-track->GetNSkipped()),
327 1./(1.+track->GetNSkipped())));
328 return track->GetNormChi2(layer);
e43c066c 329}
00a7cc50 330inline void AliITStrackerMI::AliITSdetector::GetGlobalXYZ(const AliITSRecPoint *cl, Double_t xyz[3]) const
e43c066c 331{
332 //
333 // get cluster coordinates in global cooordinate
334 //
335 xyz[2] = cl->GetZ();
336 xyz[0] = fR*fCosPhi - cl->GetY()*fSinPhi;
337 xyz[1] = fR*fSinPhi + cl->GetY()*fCosPhi;
338}
339#endif