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1/**************************************************************************
2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15/* $Id$ */
16
17//-------------------------------------------------------------------------
18// Implementation of the ITS tracker class
19// It reads AliITSRecPoint clusters and creates AliITStrackMI tracks
20// and fills with them the ESD
21// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
22// Current support and development:
23// Andrea Dainese, andrea.dainese@lnl.infn.it
24// dE/dx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
25// Params moved to AliITSRecoParam by: Andrea Dainese, INFN
26// Material budget from TGeo by: Ludovic Gaudichet & Andrea Dainese, INFN
27//-------------------------------------------------------------------------
28
29#include <TMatrixD.h>
30#include <TTree.h>
31#include <TDatabasePDG.h>
32#include <TString.h>
33#include <TRandom.h>
34#include <TTreeStream.h>
35
36
37#include "AliLog.h"
38#include "AliITSPlaneEff.h"
39#include "AliITSCalibrationSPD.h"
40#include "AliITSCalibrationSDD.h"
41#include "AliITSCalibrationSSD.h"
42#include "AliCDBEntry.h"
43#include "AliCDBManager.h"
44#include "AliAlignObj.h"
45#include "AliTrackPointArray.h"
46#include "AliESDVertex.h"
47#include "AliESDEvent.h"
48#include "AliESDtrack.h"
49#include "AliV0.h"
50#include "AliHelix.h"
51#include "AliITSChannelStatus.h"
52#include "AliITSDetTypeRec.h"
53#include "AliITSRecPoint.h"
54#include "AliITSgeomTGeo.h"
55#include "AliITSReconstructor.h"
56#include "AliITSClusterParam.h"
57#include "AliITSsegmentation.h"
58#include "AliITSCalibration.h"
59#include "AliITSPlaneEffSPD.h"
60#include "AliITSPlaneEffSDD.h"
61#include "AliITSPlaneEffSSD.h"
62#include "AliITSV0Finder.h"
63#include "AliITStrackerMI.h"
64
65ClassImp(AliITStrackerMI)
66
67AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[AliITSgeomTGeo::kNLayers]; // ITS layers
68
69AliITStrackerMI::AliITStrackerMI():AliTracker(),
70fI(0),
71fBestTrack(),
72fTrackToFollow(),
73fTrackHypothesys(),
74fBestHypothesys(),
75fOriginal(),
76fCurrentEsdTrack(),
77fPass(0),
78fAfterV0(kFALSE),
79fLastLayerToTrackTo(0),
80fCoefficients(0),
81fEsd(0),
82fTrackingPhase("Default"),
83fUseTGeo(3),
84fNtracks(0),
85fxOverX0Pipe(-1.),
86fxTimesRhoPipe(-1.),
87fxOverX0PipeTrks(0),
88fxTimesRhoPipeTrks(0),
89fxOverX0ShieldTrks(0),
90fxTimesRhoShieldTrks(0),
91fxOverX0LayerTrks(0),
92fxTimesRhoLayerTrks(0),
93fDebugStreamer(0),
94fITSChannelStatus(0),
95fkDetTypeRec(0),
96fPlaneEff(0) {
97 //Default constructor
98 Int_t i;
99 for(i=0;i<4;i++) fSPDdetzcentre[i]=0.;
100 for(i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
101 for(i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
102}
103//------------------------------------------------------------------------
104AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
105fI(AliITSgeomTGeo::GetNLayers()),
106fBestTrack(),
107fTrackToFollow(),
108fTrackHypothesys(),
109fBestHypothesys(),
110fOriginal(),
111fCurrentEsdTrack(),
112fPass(0),
113fAfterV0(kFALSE),
114fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()),
115fCoefficients(0),
116fEsd(0),
117fTrackingPhase("Default"),
118fUseTGeo(3),
119fNtracks(0),
120fxOverX0Pipe(-1.),
121fxTimesRhoPipe(-1.),
122fxOverX0PipeTrks(0),
123fxTimesRhoPipeTrks(0),
124fxOverX0ShieldTrks(0),
125fxTimesRhoShieldTrks(0),
126fxOverX0LayerTrks(0),
127fxTimesRhoLayerTrks(0),
128fDebugStreamer(0),
129fITSChannelStatus(0),
130fkDetTypeRec(0),
131fPlaneEff(0) {
132 //--------------------------------------------------------------------
133 //This is the AliITStrackerMI constructor
134 //--------------------------------------------------------------------
135 if (geom) {
136 AliWarning("\"geom\" is actually a dummy argument !");
137 }
138
139 fCoefficients = 0;
140 fAfterV0 = kFALSE;
141
142 for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
143 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
144 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
145
146 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
147 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
148 Double_t poff=TMath::ATan2(y,x);
149 Double_t zoff=z;
150 Double_t r=TMath::Sqrt(x*x + y*y);
151
152 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
153 r += TMath::Sqrt(x*x + y*y);
154 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
155 r += TMath::Sqrt(x*x + y*y);
156 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
157 r += TMath::Sqrt(x*x + y*y);
158 r*=0.25;
159
160 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
161
162 for (Int_t j=1; j<nlad+1; j++) {
163 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
164 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
165 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
166 m.Multiply(tm);
167 Double_t txyz[3]={0.};
168 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
169 m.LocalToMaster(txyz,xyz);
170 r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
171 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
172
173 if (phi<0) phi+=TMath::TwoPi();
174 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
175
176 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
177 new(&det) AliITSdetector(r,phi);
178 // compute the real radius (with misalignment)
179 TGeoHMatrix mmisal(*(AliITSgeomTGeo::GetMatrix(i,j,k)));
180 mmisal.Multiply(tm);
181 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
182 mmisal.LocalToMaster(txyz,xyz);
183 Double_t rmisal=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
184 det.SetRmisal(rmisal);
185
186 } // end loop on detectors
187 } // end loop on ladders
188 } // end loop on layers
189
190
191 fI=AliITSgeomTGeo::GetNLayers();
192
193 fPass=0;
194 fConstraint[0]=1; fConstraint[1]=0;
195
196 Double_t xyzVtx[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
197 AliITSReconstructor::GetRecoParam()->GetYVdef(),
198 AliITSReconstructor::GetRecoParam()->GetZVdef()};
199 Double_t ersVtx[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
200 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
201 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
202 SetVertex(xyzVtx,ersVtx);
203
204 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i);
205 fLastLayerToTrackTo=AliITSRecoParam::GetLastLayerToTrackTo();
206 for (Int_t i=0;i<100000;i++){
207 fBestTrackIndex[i]=0;
208 }
209
210 // store positions of centre of SPD modules (in z)
211 Double_t tr[3];
212 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
213 fSPDdetzcentre[0] = tr[2];
214 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
215 fSPDdetzcentre[1] = tr[2];
216 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
217 fSPDdetzcentre[2] = tr[2];
218 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
219 fSPDdetzcentre[3] = tr[2];
220
221 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
222 if(AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance() && fUseTGeo!=1 && fUseTGeo!=3) {
223 AliWarning("fUseTGeo changed to 3 because fExtendedEtaAcceptance is kTRUE");
224 fUseTGeo = 3;
225 }
226
227 for(Int_t i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
228 for(Int_t i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
229
230 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
231
232 // only for plane efficiency evaluation
233 if (AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
234 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0) {
235 Int_t iplane=AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff();
236 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(iplane))
237 AliWarning(Form("Evaluation of Plane Eff for layer %d will be attempted without removing it from tracker",iplane));
238 if (iplane<2) fPlaneEff = new AliITSPlaneEffSPD();
239 else if (iplane<4) fPlaneEff = new AliITSPlaneEffSDD();
240 else fPlaneEff = new AliITSPlaneEffSSD();
241 if(AliITSReconstructor::GetRecoParam()->GetReadPlaneEffFromOCDB())
242 if(!fPlaneEff->ReadFromCDB()) {AliWarning("AliITStrackerMI reading of AliITSPlaneEff from OCDB failed") ;}
243 if(AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) fPlaneEff->SetCreateHistos(kTRUE);
244 }
245}
246//------------------------------------------------------------------------
247AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
248fI(tracker.fI),
249fBestTrack(tracker.fBestTrack),
250fTrackToFollow(tracker.fTrackToFollow),
251fTrackHypothesys(tracker.fTrackHypothesys),
252fBestHypothesys(tracker.fBestHypothesys),
253fOriginal(tracker.fOriginal),
254fCurrentEsdTrack(tracker.fCurrentEsdTrack),
255fPass(tracker.fPass),
256fAfterV0(tracker.fAfterV0),
257fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
258fCoefficients(tracker.fCoefficients),
259fEsd(tracker.fEsd),
260fTrackingPhase(tracker.fTrackingPhase),
261fUseTGeo(tracker.fUseTGeo),
262fNtracks(tracker.fNtracks),
263fxOverX0Pipe(tracker.fxOverX0Pipe),
264fxTimesRhoPipe(tracker.fxTimesRhoPipe),
265fxOverX0PipeTrks(0),
266fxTimesRhoPipeTrks(0),
267fxOverX0ShieldTrks(0),
268fxTimesRhoShieldTrks(0),
269fxOverX0LayerTrks(0),
270fxTimesRhoLayerTrks(0),
271fDebugStreamer(tracker.fDebugStreamer),
272fITSChannelStatus(tracker.fITSChannelStatus),
273fkDetTypeRec(tracker.fkDetTypeRec),
274fPlaneEff(tracker.fPlaneEff) {
275 //Copy constructor
276 Int_t i;
277 for(i=0;i<4;i++) {
278 fSPDdetzcentre[i]=tracker.fSPDdetzcentre[i];
279 }
280 for(i=0;i<6;i++) {
281 fxOverX0Layer[i]=tracker.fxOverX0Layer[i];
282 fxTimesRhoLayer[i]=tracker.fxTimesRhoLayer[i];
283 }
284 for(i=0;i<2;i++) {
285 fxOverX0Shield[i]=tracker.fxOverX0Shield[i];
286 fxTimesRhoShield[i]=tracker.fxTimesRhoShield[i];
287 }
288}
289//------------------------------------------------------------------------
290AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
291 //Assignment operator
292 this->~AliITStrackerMI();
293 new(this) AliITStrackerMI(tracker);
294 return *this;
295}
296//------------------------------------------------------------------------
297AliITStrackerMI::~AliITStrackerMI()
298{
299 //
300 //destructor
301 //
302 if (fCoefficients) delete [] fCoefficients;
303 DeleteTrksMaterialLUT();
304 if (fDebugStreamer) {
305 //fDebugStreamer->Close();
306 delete fDebugStreamer;
307 }
308 if(fITSChannelStatus) delete fITSChannelStatus;
309 if(fPlaneEff) delete fPlaneEff;
310}
311//------------------------------------------------------------------------
312void AliITStrackerMI::SetLayersNotToSkip(const Int_t *l) {
313 //--------------------------------------------------------------------
314 //This function set masks of the layers which must be not skipped
315 //--------------------------------------------------------------------
316 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=l[i];
317}
318//------------------------------------------------------------------------
319void AliITStrackerMI::ReadBadFromDetTypeRec() {
320 //--------------------------------------------------------------------
321 //This function read ITS bad detectors, chips, channels from AliITSDetTypeRec
322 //i.e. from OCDB
323 //--------------------------------------------------------------------
324
325 if(!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return;
326
327 Info("ReadBadFromDetTypeRec","Reading info about bad ITS detectors and channels");
328
329 if(!fkDetTypeRec) Error("ReadBadFromDetTypeRec","AliITSDetTypeRec nof found!\n");
330
331 // ITS channels map
332 if(fITSChannelStatus) delete fITSChannelStatus;
333 fITSChannelStatus = new AliITSChannelStatus(fkDetTypeRec);
334
335 // ITS detectors and chips
336 Int_t i=0,j=0,k=0,ndet=0;
337 for (i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
338 Int_t nBadDetsPerLayer=0;
339 ndet=AliITSgeomTGeo::GetNDetectors(i);
340 for (j=1; j<AliITSgeomTGeo::GetNLadders(i)+1; j++) {
341 for (k=1; k<ndet+1; k++) {
342 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
343 det.ReadBadDetectorAndChips(i-1,(j-1)*ndet + k-1,fkDetTypeRec);
344 if(det.IsBad()) {nBadDetsPerLayer++;}
345 } // end loop on detectors
346 } // end loop on ladders
347 Info("ReadBadFromDetTypeRec",Form("Layer %d: %d bad out of %d",i-1,nBadDetsPerLayer,ndet*AliITSgeomTGeo::GetNLadders(i)));
348 } // end loop on layers
349
350 return;
351}
352//------------------------------------------------------------------------
353Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
354 //--------------------------------------------------------------------
355 //This function loads ITS clusters
356 //--------------------------------------------------------------------
357 TBranch *branch=cTree->GetBranch("ITSRecPoints");
358 if (!branch) {
359 Error("LoadClusters"," can't get the branch !\n");
360 return 1;
361 }
362
363 static TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
364 branch->SetAddress(&clusters);
365
366 Int_t i=0,j=0,ndet=0;
367 Int_t detector=0;
368 for (i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
369 ndet=fgLayers[i].GetNdetectors();
370 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
371 for (; j<jmax; j++) {
372 if (!cTree->GetEvent(j)) continue;
373 Int_t ncl=clusters->GetEntriesFast();
374 SignDeltas(clusters,GetZ());
375
376 while (ncl--) {
377 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
378 detector=c->GetDetectorIndex();
379
380 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
381
382 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
383 }
384 clusters->Delete();
385 // add dead zone "virtual" cluster in SPD, if there is a cluster within
386 // zwindow cm from the dead zone
387 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
388 for (Float_t xdead = 0; xdead < AliITSRecoParam::GetSPDdetxlength(); xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
389 Int_t lab[4] = {0,0,0,detector};
390 Int_t info[3] = {0,0,i};
391 Float_t q = 0.; // this identifies virtual clusters
392 Float_t hit[5] = {xdead,
393 0.,
394 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
395 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
396 q};
397 Bool_t local = kTRUE;
398 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
399 hit[1] = fSPDdetzcentre[0]+0.5*AliITSRecoParam::GetSPDdetzlength();
400 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
401 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
402 hit[1] = fSPDdetzcentre[1]-0.5*AliITSRecoParam::GetSPDdetzlength();
403 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
404 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
405 hit[1] = fSPDdetzcentre[1]+0.5*AliITSRecoParam::GetSPDdetzlength();
406 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
407 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
408 hit[1] = fSPDdetzcentre[2]-0.5*AliITSRecoParam::GetSPDdetzlength();
409 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
410 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
411 hit[1] = fSPDdetzcentre[2]+0.5*AliITSRecoParam::GetSPDdetzlength();
412 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
413 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
414 hit[1] = fSPDdetzcentre[3]-0.5*AliITSRecoParam::GetSPDdetzlength();
415 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
416 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
417 }
418 } // "virtual" clusters in SPD
419
420 }
421 //
422 fgLayers[i].ResetRoad(); //road defined by the cluster density
423 fgLayers[i].SortClusters();
424 }
425
426 dummy.Clear();
427
428 return 0;
429}
430//------------------------------------------------------------------------
431void AliITStrackerMI::UnloadClusters() {
432 //--------------------------------------------------------------------
433 //This function unloads ITS clusters
434 //--------------------------------------------------------------------
435 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
436}
437//------------------------------------------------------------------------
438void AliITStrackerMI::FillClusterArray(TObjArray* array) const {
439 //--------------------------------------------------------------------
440 // Publishes all pointers to clusters known to the tracker into the
441 // passed object array.
442 // The ownership is not transfered - the caller is not expected to delete
443 // the clusters.
444 //--------------------------------------------------------------------
445
446 for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
447 for(Int_t icl=0; icl<fgLayers[i].GetNumberOfClusters(); icl++) {
448 AliCluster *cl = (AliCluster*)fgLayers[i].GetCluster(icl);
449 array->AddLast(cl);
450 }
451 }
452
453 return;
454}
455//------------------------------------------------------------------------
456Int_t AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
457 //--------------------------------------------------------------------
458 // Correction for the material between the TPC and the ITS
459 //--------------------------------------------------------------------
460 if (t->GetX() > AliITSRecoParam::Getriw()) { // inward direction
461 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw(),1)) return 0;// TPC inner wall
462 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
463 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
464 } else if (t->GetX() < AliITSRecoParam::Getrs()) { // outward direction
465 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
466 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
467 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw()+0.001,1)) return 0;// TPC inner wall
468 } else {
469 printf("CorrectForTPCtoITSDeadZoneMaterial: Track is already in the dead zone !\n");
470 return 0;
471 }
472
473 return 1;
474}
475//------------------------------------------------------------------------
476Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
477 //--------------------------------------------------------------------
478 // This functions reconstructs ITS tracks
479 // The clusters must be already loaded !
480 //--------------------------------------------------------------------
481
482
483 fTrackingPhase="Clusters2Tracks";
484
485 TObjArray itsTracks(15000);
486 fOriginal.Clear();
487 fEsd = event; // store pointer to the esd
488
489 // temporary (for cosmics)
490 if(event->GetVertex()) {
491 TString title = event->GetVertex()->GetTitle();
492 if(title.Contains("cosmics")) {
493 Double_t xyz[3]={GetX(),GetY(),GetZ()};
494 Double_t exyz[3]={0.1,0.1,0.1};
495 SetVertex(xyz,exyz);
496 }
497 }
498 // temporary
499
500 {/* Read ESD tracks */
501 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
502 Int_t nentr=event->GetNumberOfTracks();
503 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
504 while (nentr--) {
505 AliESDtrack *esd=event->GetTrack(nentr);
506 // ---- for debugging:
507 //if(TMath::Abs(esd->GetX()-83.65)<0.1) { FILE *f=fopen("tpc.dat","a"); fprintf(f,"%f %f %f %f %f %f\n",(Float_t)event->GetEventNumberInFile(),(Float_t)TMath::Abs(esd->GetLabel()),(Float_t)esd->GetX(),(Float_t)esd->GetY(),(Float_t)esd->GetZ(),(Float_t)esd->Pt()); fclose(f); }
508
509 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
510 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
511 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
512 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
513 AliITStrackMI *t=0;
514 try {
515 t=new AliITStrackMI(*esd);
516 } catch (const Char_t *msg) {
517 //Warning("Clusters2Tracks",msg);
518 delete t;
519 continue;
520 }
521 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
522 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
523
524
525 // look at the ESD mass hypothesys !
526 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
527 // write expected q
528 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
529
530 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
531 //track - can be V0 according to TPC
532 } else {
533 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
534 delete t;
535 continue;
536 }
537 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
538 delete t;
539 continue;
540 }
541 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
542 delete t;
543 continue;
544 }
545 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
546 delete t;
547 continue;
548 }
549 }
550 t->SetReconstructed(kFALSE);
551 itsTracks.AddLast(t);
552 fOriginal.AddLast(t);
553 }
554 } /* End Read ESD tracks */
555
556 itsTracks.Sort();
557 fOriginal.Sort();
558 Int_t nentr=itsTracks.GetEntriesFast();
559 fTrackHypothesys.Expand(nentr);
560 fBestHypothesys.Expand(nentr);
561 MakeCoefficients(nentr);
562 if(fUseTGeo==3 || fUseTGeo==4) MakeTrksMaterialLUT(event->GetNumberOfTracks());
563 Int_t ntrk=0;
564 // THE TWO TRACKING PASSES
565 for (fPass=0; fPass<2; fPass++) {
566 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
567 for (fCurrentEsdTrack=0; fCurrentEsdTrack<nentr; fCurrentEsdTrack++) {
568 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(fCurrentEsdTrack);
569 if (t==0) continue; //this track has been already tracked
570 //cout<<"========== "<<fPass<<" "<<fCurrentEsdTrack<<" =========\n";
571 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
572 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
573 if (fConstraint[fPass]) {
574 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
575 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
576 }
577
578 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
579 AliDebug(2,Form("LABEL %d pass %d",tpcLabel,fPass));
580 fI = 6;
581 ResetTrackToFollow(*t);
582 ResetBestTrack();
583
584 FollowProlongationTree(t,fCurrentEsdTrack,fConstraint[fPass]);
585
586
587 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
588 //
589 AliITStrackMI *besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
590 if (!besttrack) continue;
591 besttrack->SetLabel(tpcLabel);
592 // besttrack->CookdEdx();
593 CookdEdx(besttrack);
594 besttrack->SetFakeRatio(1.);
595 CookLabel(besttrack,0.); //For comparison only
596 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
597
598 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
599
600 t->SetReconstructed(kTRUE);
601 ntrk++;
602 AliDebug(2,Form("TRACK! (label %d) ncls %d",besttrack->GetLabel(),besttrack->GetNumberOfClusters()));
603 }
604 GetBestHypothesysMIP(itsTracks);
605 } // end loop on the two tracking passes
606
607 if(event->GetNumberOfV0s()>0) UpdateTPCV0(event);
608 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) FindV02(event);
609 //if(event->GetNumberOfV0s()>0) AliITSV0Finder::UpdateTPCV0(event,this);
610 //if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::FindV02(event,this);
611 fAfterV0 = kTRUE;
612 //
613 itsTracks.Delete();
614 //
615 Int_t entries = fTrackHypothesys.GetEntriesFast();
616 for (Int_t ientry=0; ientry<entries; ientry++) {
617 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
618 if (array) array->Delete();
619 delete fTrackHypothesys.RemoveAt(ientry);
620 }
621
622 fTrackHypothesys.Delete();
623 fBestHypothesys.Delete();
624 fOriginal.Clear();
625 delete [] fCoefficients;
626 fCoefficients=0;
627 DeleteTrksMaterialLUT();
628
629 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
630
631 fTrackingPhase="Default";
632
633 return 0;
634}
635//------------------------------------------------------------------------
636Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
637 //--------------------------------------------------------------------
638 // This functions propagates reconstructed ITS tracks back
639 // The clusters must be loaded !
640 //--------------------------------------------------------------------
641 fTrackingPhase="PropagateBack";
642 Int_t nentr=event->GetNumberOfTracks();
643 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
644
645 Int_t ntrk=0;
646 for (Int_t i=0; i<nentr; i++) {
647 AliESDtrack *esd=event->GetTrack(i);
648
649 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
650 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
651
652 AliITStrackMI *t=0;
653 try {
654 t=new AliITStrackMI(*esd);
655 } catch (const Char_t *msg) {
656 //Warning("PropagateBack",msg);
657 delete t;
658 continue;
659 }
660 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
661
662 ResetTrackToFollow(*t);
663
664 // propagate to vertex [SR, GSI 17.02.2003]
665 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
666 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
667 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
668 fTrackToFollow.StartTimeIntegral();
669 // from vertex to outside pipe
670 CorrectForPipeMaterial(&fTrackToFollow,"outward");
671 }
672
673 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
674 if (RefitAt(AliITSRecoParam::GetrInsideITSscreen(),&fTrackToFollow,t)) {
675 if (!CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)) {
676 delete t;
677 continue;
678 }
679 fTrackToFollow.SetLabel(t->GetLabel());
680 //fTrackToFollow.CookdEdx();
681 CookLabel(&fTrackToFollow,0.); //For comparison only
682 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
683 //UseClusters(&fTrackToFollow);
684 ntrk++;
685 }
686 delete t;
687 }
688
689 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
690
691 fTrackingPhase="Default";
692
693 return 0;
694}
695//------------------------------------------------------------------------
696Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
697 //--------------------------------------------------------------------
698 // This functions refits ITS tracks using the
699 // "inward propagated" TPC tracks
700 // The clusters must be loaded !
701 //--------------------------------------------------------------------
702 fTrackingPhase="RefitInward";
703
704 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) RefitV02(event);
705 //if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::RefitV02(event,this);
706
707 Int_t nentr=event->GetNumberOfTracks();
708 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
709
710 Int_t ntrk=0;
711 for (Int_t i=0; i<nentr; i++) {
712 AliESDtrack *esd=event->GetTrack(i);
713
714 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
715 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
716 if (esd->GetStatus()&AliESDtrack::kTPCout)
717 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
718
719 AliITStrackMI *t=0;
720 try {
721 t=new AliITStrackMI(*esd);
722 } catch (const Char_t *msg) {
723 //Warning("RefitInward",msg);
724 delete t;
725 continue;
726 }
727 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
728 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
729 delete t;
730 continue;
731 }
732
733 ResetTrackToFollow(*t);
734 fTrackToFollow.ResetClusters();
735
736 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
737 fTrackToFollow.ResetCovariance(10.);
738
739 //Refitting...
740 Bool_t pe=(AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
741 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0);
742 AliDebug(2,Form("Refit LABEL %d %d",t->GetLabel(),t->GetNumberOfClusters()));
743 if (RefitAt(AliITSRecoParam::GetrInsideSPD1(),&fTrackToFollow,t,kTRUE,pe)) {
744 AliDebug(2," refit OK");
745 fTrackToFollow.SetLabel(t->GetLabel());
746 // fTrackToFollow.CookdEdx();
747 CookdEdx(&fTrackToFollow);
748
749 CookLabel(&fTrackToFollow,0.0); //For comparison only
750
751 //The beam pipe
752 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
753 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
754 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
755 //printf(" %d\n",esdTrack->GetITSModuleIndex(0));
756 //esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); //original line
757 Double_t r[3]={0.,0.,0.};
758 Double_t maxD=3.;
759 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
760 ntrk++;
761 }
762 }
763 delete t;
764 }
765
766 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
767
768 fTrackingPhase="Default";
769
770 return 0;
771}
772//------------------------------------------------------------------------
773AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
774 //--------------------------------------------------------------------
775 // Return pointer to a given cluster
776 //--------------------------------------------------------------------
777 Int_t l=(index & 0xf0000000) >> 28;
778 Int_t c=(index & 0x0fffffff) >> 00;
779 return fgLayers[l].GetCluster(c);
780}
781//------------------------------------------------------------------------
782Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
783 //--------------------------------------------------------------------
784 // Get track space point with index i
785 //--------------------------------------------------------------------
786
787 Int_t l=(index & 0xf0000000) >> 28;
788 Int_t c=(index & 0x0fffffff) >> 00;
789 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
790 Int_t idet = cl->GetDetectorIndex();
791
792 Float_t xyz[3];
793 Float_t cov[6];
794 cl->GetGlobalXYZ(xyz);
795 cl->GetGlobalCov(cov);
796 p.SetXYZ(xyz, cov);
797 p.SetCharge(cl->GetQ());
798 p.SetDriftTime(cl->GetDriftTime());
799 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
800 switch (l) {
801 case 0:
802 iLayer = AliGeomManager::kSPD1;
803 break;
804 case 1:
805 iLayer = AliGeomManager::kSPD2;
806 break;
807 case 2:
808 iLayer = AliGeomManager::kSDD1;
809 break;
810 case 3:
811 iLayer = AliGeomManager::kSDD2;
812 break;
813 case 4:
814 iLayer = AliGeomManager::kSSD1;
815 break;
816 case 5:
817 iLayer = AliGeomManager::kSSD2;
818 break;
819 default:
820 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
821 break;
822 };
823 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
824 p.SetVolumeID((UShort_t)volid);
825 return kTRUE;
826}
827//------------------------------------------------------------------------
828Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
829 AliTrackPoint& p, const AliESDtrack *t) {
830 //--------------------------------------------------------------------
831 // Get track space point with index i
832 // (assign error estimated during the tracking)
833 //--------------------------------------------------------------------
834
835 Int_t l=(index & 0xf0000000) >> 28;
836 Int_t c=(index & 0x0fffffff) >> 00;
837 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
838 Int_t idet = cl->GetDetectorIndex();
839
840 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
841
842 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
843 Float_t detxy[2];
844 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
845 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
846 Double_t alpha = t->GetAlpha();
847 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
848 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe,GetBz()));
849 phi += alpha-det.GetPhi();
850 Float_t tgphi = TMath::Tan(phi);
851
852 Float_t tgl = t->GetTgl(); // tgl about const along track
853 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
854
855 Float_t errlocalx,errlocalz;
856 Bool_t addMisalErr=kFALSE;
857 AliITSClusterParam::GetError(l,cl,tgl,tgphi,expQ,errlocalx,errlocalz,addMisalErr);
858
859 Float_t xyz[3];
860 Float_t cov[6];
861 cl->GetGlobalXYZ(xyz);
862 // cl->GetGlobalCov(cov);
863 Float_t pos[3] = {0.,0.,0.};
864 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errlocalx*errlocalx,errlocalz*errlocalz,0);
865 tmpcl.GetGlobalCov(cov);
866
867 p.SetXYZ(xyz, cov);
868 p.SetCharge(cl->GetQ());
869 p.SetDriftTime(cl->GetDriftTime());
870
871 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
872 switch (l) {
873 case 0:
874 iLayer = AliGeomManager::kSPD1;
875 break;
876 case 1:
877 iLayer = AliGeomManager::kSPD2;
878 break;
879 case 2:
880 iLayer = AliGeomManager::kSDD1;
881 break;
882 case 3:
883 iLayer = AliGeomManager::kSDD2;
884 break;
885 case 4:
886 iLayer = AliGeomManager::kSSD1;
887 break;
888 case 5:
889 iLayer = AliGeomManager::kSSD2;
890 break;
891 default:
892 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
893 break;
894 };
895 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
896
897 p.SetVolumeID((UShort_t)volid);
898 return kTRUE;
899}
900//------------------------------------------------------------------------
901void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
902{
903 //--------------------------------------------------------------------
904 // Follow prolongation tree
905 //--------------------------------------------------------------------
906 //
907 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
908 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
909
910
911 AliESDtrack * esd = otrack->GetESDtrack();
912 if (esd->GetV0Index(0)>0) {
913 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
914 // mapping of ESD track is different as ITS track in Containers
915 // Need something more stable
916 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
917 for (Int_t i=0;i<3;i++){
918 Int_t index = esd->GetV0Index(i);
919 if (index==0) break;
920 AliESDv0 * vertex = fEsd->GetV0(index);
921 if (vertex->GetStatus()<0) continue; // rejected V0
922 //
923 if (esd->GetSign()>0) {
924 vertex->SetIndex(0,esdindex);
925 } else {
926 vertex->SetIndex(1,esdindex);
927 }
928 }
929 }
930 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
931 if (!bestarray){
932 bestarray = new TObjArray(5);
933 fBestHypothesys.AddAt(bestarray,esdindex);
934 }
935
936 //
937 //setup tree of the prolongations
938 //
939 static AliITStrackMI tracks[7][100];
940 AliITStrackMI *currenttrack;
941 static AliITStrackMI currenttrack1;
942 static AliITStrackMI currenttrack2;
943 static AliITStrackMI backuptrack;
944 Int_t ntracks[7];
945 Int_t nindexes[7][100];
946 Float_t normalizedchi2[100];
947 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
948 otrack->SetNSkipped(0);
949 new (&(tracks[6][0])) AliITStrackMI(*otrack);
950 ntracks[6]=1;
951 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
952 Int_t modstatus = 1; // found
953 Float_t xloc,zloc;
954 //
955 //
956 // follow prolongations
957 for (Int_t ilayer=5; ilayer>=0; ilayer--) {
958 AliDebug(2,Form("FollowProlongationTree: layer %d",ilayer));
959 fI = ilayer;
960 //
961 AliITSlayer &layer=fgLayers[ilayer];
962 Double_t r = layer.GetR();
963 ntracks[ilayer]=0;
964 //
965 //
966 Int_t nskipped=0;
967 Float_t nused =0;
968 for (Int_t itrack =0; itrack<ntracks[ilayer+1]; itrack++) {
969 //set current track
970 if (ntracks[ilayer]>=100) break;
971 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
972 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
973 if (ntracks[ilayer]>15+ilayer){
974 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
975 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
976 }
977
978 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
979
980 // material between SSD and SDD, SDD and SPD
981 if (ilayer==3)
982 if(!CorrectForShieldMaterial(&currenttrack1,"SDD","inward")) continue;
983 if (ilayer==1)
984 if(!CorrectForShieldMaterial(&currenttrack1,"SPD","inward")) continue;
985
986 // detector number
987 Double_t phi,z;
988 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
989 Int_t idet=layer.FindDetectorIndex(phi,z);
990
991 Double_t trackGlobXYZ1[3];
992 if (!currenttrack1.GetXYZ(trackGlobXYZ1)) continue;
993
994 // Get the budget to the primary vertex for the current track being prolonged
995 Double_t budgetToPrimVertex = GetEffectiveThickness();
996
997 // check if we allow a prolongation without point
998 Int_t skip = CheckSkipLayer(&currenttrack1,ilayer,idet);
999 if (skip) {
1000 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1001 // propagate to the layer radius
1002 Double_t xToGo; if (!vtrack->GetLocalXat(r,xToGo)) continue;
1003 if(!vtrack->Propagate(xToGo)) continue;
1004 // apply correction for material of the current layer
1005 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1006 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
1007 vtrack->SetClIndex(ilayer,-1);
1008 modstatus = (skip==1 ? 3 : 4); // skipped : out in z
1009 if(LocalModuleCoord(ilayer,idet,vtrack,xloc,zloc)) { // local module coords
1010 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1011 }
1012 if(constrain) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1013 ntracks[ilayer]++;
1014 continue;
1015 }
1016
1017 // track outside layer acceptance in z
1018 if (idet<0) continue;
1019
1020 //propagate to the intersection with the detector plane
1021 const AliITSdetector &det=layer.GetDetector(idet);
1022 new(&currenttrack2) AliITStrackMI(currenttrack1);
1023 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
1024 if (!currenttrack2.Propagate(det.GetPhi(),det.GetR())) continue;
1025 currenttrack1.SetDetectorIndex(idet);
1026 currenttrack2.SetDetectorIndex(idet);
1027 if(!LocalModuleCoord(ilayer,idet,&currenttrack1,xloc,zloc)) continue; // local module coords
1028
1029 //***************
1030 // DEFINITION OF SEARCH ROAD AND CLUSTERS SELECTION
1031 //
1032 // road in global (rphi,z) [i.e. in tracking ref. system]
1033 Double_t zmin,zmax,ymin,ymax;
1034 if (!ComputeRoad(&currenttrack1,ilayer,idet,zmin,zmax,ymin,ymax)) continue;
1035
1036 // select clusters in road
1037 layer.SelectClusters(zmin,zmax,ymin,ymax);
1038 //********************
1039
1040 // Define criteria for track-cluster association
1041 Double_t msz = currenttrack1.GetSigmaZ2() +
1042 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1043 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1044 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
1045 Double_t msy = currenttrack1.GetSigmaY2() +
1046 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1047 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1048 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
1049 if (constrain) {
1050 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
1051 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
1052 } else {
1053 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
1054 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
1055 }
1056 msz = 1./msz; // 1/RoadZ^2
1057 msy = 1./msy; // 1/RoadY^2
1058
1059 //
1060 //
1061 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
1062 //
1063 const AliITSRecPoint *cl=0;
1064 Int_t clidx=-1;
1065 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
1066 Bool_t deadzoneSPD=kFALSE;
1067 currenttrack = &currenttrack1;
1068
1069 // check if the road contains a dead zone
1070 Bool_t noClusters = kFALSE;
1071 if (!layer.GetNextCluster(clidx,kTRUE)) noClusters=kTRUE;
1072 if (noClusters) AliDebug(2,"no clusters in road");
1073 Double_t dz=0.5*(zmax-zmin);
1074 Double_t dy=0.5*(ymax-ymin);
1075 Int_t dead = CheckDeadZone(&currenttrack1,ilayer,idet,dz,dy,noClusters);
1076 if(dead) AliDebug(2,Form("DEAD (%d)\n",dead));
1077 // create a prolongation without clusters (check also if there are no clusters in the road)
1078 if (dead ||
1079 (noClusters &&
1080 AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad())) {
1081 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1082 updatetrack->SetClIndex(ilayer,-1);
1083 if (dead==0) {
1084 modstatus = 5; // no cls in road
1085 } else if (dead==1) {
1086 modstatus = 7; // holes in z in SPD
1087 } else if (dead==2 || dead==3) {
1088 modstatus = 2; // dead from OCDB
1089 }
1090 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1091 // apply correction for material of the current layer
1092 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1093 if (constrain) { // apply vertex constrain
1094 updatetrack->SetConstrain(constrain);
1095 Bool_t isPrim = kTRUE;
1096 if (ilayer<4) { // check that it's close to the vertex
1097 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1098 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1099 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1100 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1101 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1102 }
1103 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1104 }
1105 if (dead) {
1106 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1107 if (dead==1) { // dead zone at z=0,+-7cm in SPD
1108 updatetrack->SetDeadZoneProbability(GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1109 deadzoneSPD=kTRUE;
1110 }
1111 }
1112 ntracks[ilayer]++;
1113 }
1114
1115 clidx=-1;
1116 // loop over clusters in the road
1117 while ((cl=layer.GetNextCluster(clidx))!=0) {
1118 if (ntracks[ilayer]>95) break; //space for skipped clusters
1119 Bool_t changedet =kFALSE;
1120 if (cl->GetQ()==0 && deadzoneSPD==kTRUE) continue;
1121 Int_t idetc=cl->GetDetectorIndex();
1122
1123 if (currenttrack->GetDetectorIndex()==idetc) { // track already on the cluster's detector
1124 // take into account misalignment (bring track to real detector plane)
1125 Double_t xTrOrig = currenttrack->GetX();
1126 if (!currenttrack->Propagate(xTrOrig+cl->GetX())) continue;
1127 // a first cut on track-cluster distance
1128 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
1129 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
1130 { // cluster not associated to track
1131 AliDebug(2,"not associated");
1132 continue;
1133 }
1134 // bring track back to ideal detector plane
1135 if (!currenttrack->Propagate(xTrOrig)) continue;
1136 } else { // have to move track to cluster's detector
1137 const AliITSdetector &detc=layer.GetDetector(idetc);
1138 // a first cut on track-cluster distance
1139 Double_t y;
1140 if (!currenttrack2.GetProlongationFast(detc.GetPhi(),detc.GetR()+cl->GetX(),y,z)) continue;
1141 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
1142 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
1143 continue; // cluster not associated to track
1144 //
1145 new (&backuptrack) AliITStrackMI(currenttrack2);
1146 changedet = kTRUE;
1147 currenttrack =&currenttrack2;
1148 if (!currenttrack->Propagate(detc.GetPhi(),detc.GetR())) {
1149 new (currenttrack) AliITStrackMI(backuptrack);
1150 changedet = kFALSE;
1151 continue;
1152 }
1153 currenttrack->SetDetectorIndex(idetc);
1154 // Get again the budget to the primary vertex
1155 // for the current track being prolonged, if had to change detector
1156 //budgetToPrimVertex = GetEffectiveThickness();// not needed at the moment because anyway we take a mean material for this correction
1157 }
1158
1159 // calculate track-clusters chi2
1160 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
1161 // chi2 cut
1162 AliDebug(2,Form("chi2 %f max %f",chi2trkcl,AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)));
1163 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
1164 if (cl->GetQ()==0) deadzoneSPD=kTRUE; // only 1 prolongation with virtual cluster
1165 if (ntracks[ilayer]>=100) continue;
1166 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1167 updatetrack->SetClIndex(ilayer,-1);
1168 if (changedet) new (&currenttrack2) AliITStrackMI(backuptrack);
1169
1170 if (cl->GetQ()!=0) { // real cluster
1171 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) {
1172 AliDebug(2,"update failed");
1173 continue;
1174 }
1175 updatetrack->SetSampledEdx(cl->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
1176 modstatus = 1; // found
1177 } else { // virtual cluster in dead zone
1178 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1179 updatetrack->SetDeadZoneProbability(GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1180 modstatus = 7; // holes in z in SPD
1181 }
1182
1183 if (changedet) {
1184 Float_t xlocnewdet,zlocnewdet;
1185 if(LocalModuleCoord(ilayer,idet,updatetrack,xlocnewdet,zlocnewdet)) { // local module coords
1186 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xlocnewdet,zlocnewdet);
1187 }
1188 } else {
1189 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1190 }
1191 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1192
1193 // apply correction for material of the current layer
1194 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1195
1196 if (constrain) { // apply vertex constrain
1197 updatetrack->SetConstrain(constrain);
1198 Bool_t isPrim = kTRUE;
1199 if (ilayer<4) { // check that it's close to the vertex
1200 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1201 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1202 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1203 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1204 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1205 }
1206 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1207 } //apply vertex constrain
1208 ntracks[ilayer]++;
1209 } // create new hypothesis
1210 else {
1211 AliDebug(2,"chi2 too large");
1212 }
1213
1214 } // loop over possible prolongations
1215
1216 // allow one prolongation without clusters
1217 if (constrain && itrack<=1 && currenttrack1.GetNSkipped()==0 && deadzoneSPD==kFALSE && ntracks[ilayer]<100) {
1218 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1219 // apply correction for material of the current layer
1220 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1221 vtrack->SetClIndex(ilayer,-1);
1222 modstatus = 3; // skipped
1223 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1224 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1225 vtrack->IncrementNSkipped();
1226 ntracks[ilayer]++;
1227 }
1228
1229 // allow one prolongation without clusters for tracks with |tgl|>1.1
1230 if (constrain && itrack==0 && TMath::Abs(currenttrack1.GetTgl())>1.1) { //big theta - for low flux
1231 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1232 // apply correction for material of the current layer
1233 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1234 vtrack->SetClIndex(ilayer,-1);
1235 modstatus = 3; // skipped
1236 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1237 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1238 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
1239 ntracks[ilayer]++;
1240 }
1241
1242
1243 } // loop over tracks in layer ilayer+1
1244
1245 //loop over track candidates for the current layer
1246 //
1247 //
1248 Int_t accepted=0;
1249
1250 Int_t golden=0;
1251 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1252 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
1253 if (normalizedchi2[itrack] <
1254 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
1255 if (ilayer>4) {
1256 accepted++;
1257 } else {
1258 if (constrain) { // constrain
1259 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1260 accepted++;
1261 } else { // !constrain
1262 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1263 accepted++;
1264 }
1265 }
1266 }
1267 // sort tracks by increasing normalized chi2
1268 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
1269 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
1270 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
1271 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
1272 } // end loop over layers
1273
1274
1275 //
1276 // Now select tracks to be kept
1277 //
1278 Int_t max = constrain ? 20 : 5;
1279
1280 // tracks that reach layer 0 (SPD inner)
1281 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
1282 AliITStrackMI & track= tracks[0][nindexes[0][i]];
1283 if (track.GetNumberOfClusters()<2) continue;
1284 if (!constrain && track.GetNormChi2(0) >
1285 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) {
1286 continue;
1287 }
1288 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1289 }
1290
1291 // tracks that reach layer 1 (SPD outer)
1292 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
1293 AliITStrackMI & track= tracks[1][nindexes[1][i]];
1294 if (track.GetNumberOfClusters()<4) continue;
1295 if (!constrain && track.GetNormChi2(1) >
1296 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1297 if (constrain) track.IncrementNSkipped();
1298 if (!constrain) {
1299 track.SetD(0,track.GetD(GetX(),GetY()));
1300 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
1301 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1302 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1303 }
1304 }
1305 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1306 }
1307
1308 // tracks that reach layer 2 (SDD inner), only during non-constrained pass
1309 if (!constrain){
1310 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
1311 AliITStrackMI & track= tracks[2][nindexes[2][i]];
1312 if (track.GetNumberOfClusters()<3) continue;
1313 if (!constrain && track.GetNormChi2(2) >
1314 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1315 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
1316 if (!constrain){
1317 track.SetD(0,track.GetD(GetX(),GetY()));
1318 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
1319 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1320 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1321 }
1322 }
1323 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1324 }
1325 }
1326
1327 if (!constrain) {
1328 //
1329 // register best track of each layer - important for V0 finder
1330 //
1331 for (Int_t ilayer=0;ilayer<5;ilayer++){
1332 if (ntracks[ilayer]==0) continue;
1333 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1334 if (track.GetNumberOfClusters()<1) continue;
1335 CookLabel(&track,0);
1336 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1337 }
1338 }
1339 //
1340 // update TPC V0 information
1341 //
1342 if (otrack->GetESDtrack()->GetV0Index(0)>0){
1343 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1344 for (Int_t i=0;i<3;i++){
1345 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
1346 if (index==0) break;
1347 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
1348 if (vertex->GetStatus()<0) continue; // rejected V0
1349 //
1350 if (otrack->GetSign()>0) {
1351 vertex->SetIndex(0,esdindex);
1352 }
1353 else{
1354 vertex->SetIndex(1,esdindex);
1355 }
1356 //find nearest layer with track info
1357 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1358 Int_t nearestold = GetNearestLayer(xrp); //I.B.
1359 Int_t nearest = nearestold;
1360 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1361 if (ntracks[nearest]==0){
1362 nearest = ilayer;
1363 }
1364 }
1365 //
1366 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1367 if (nearestold<5&&nearest<5){
1368 Bool_t accept = track.GetNormChi2(nearest)<10;
1369 if (accept){
1370 if (track.GetSign()>0) {
1371 vertex->SetParamP(track);
1372 vertex->Update(fprimvertex);
1373 //vertex->SetIndex(0,track.fESDtrack->GetID());
1374 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1375 }else{
1376 vertex->SetParamN(track);
1377 vertex->Update(fprimvertex);
1378 //vertex->SetIndex(1,track.fESDtrack->GetID());
1379 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1380 }
1381 vertex->SetStatus(vertex->GetStatus()+1);
1382 }else{
1383 //vertex->SetStatus(-2); // reject V0 - not enough clusters
1384 }
1385 }
1386 }
1387 }
1388
1389}
1390//------------------------------------------------------------------------
1391AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1392{
1393 //--------------------------------------------------------------------
1394 //
1395 //
1396 return fgLayers[layer];
1397}
1398//------------------------------------------------------------------------
1399AliITStrackerMI::AliITSlayer::AliITSlayer():
1400fR(0),
1401fPhiOffset(0),
1402fNladders(0),
1403fZOffset(0),
1404fNdetectors(0),
1405fDetectors(0),
1406fN(0),
1407fDy5(0),
1408fDy10(0),
1409fDy20(0),
1410fClustersCs(0),
1411fClusterIndexCs(0),
1412fYcs(0),
1413fZcs(0),
1414fNcs(0),
1415fCurrentSlice(-1),
1416fZmax(0),
1417fYmin(0),
1418fYmax(0),
1419fI(0),
1420fImax(0),
1421fSkip(0),
1422fAccepted(0),
1423fRoad(0){
1424 //--------------------------------------------------------------------
1425 //default AliITSlayer constructor
1426 //--------------------------------------------------------------------
1427 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1428 fClusterWeight[i]=0;
1429 fClusterTracks[0][i]=-1;
1430 fClusterTracks[1][i]=-1;
1431 fClusterTracks[2][i]=-1;
1432 fClusterTracks[3][i]=-1;
1433 }
1434}
1435//------------------------------------------------------------------------
1436AliITStrackerMI::AliITSlayer::
1437AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1438fR(r),
1439fPhiOffset(p),
1440fNladders(nl),
1441fZOffset(z),
1442fNdetectors(nd),
1443fDetectors(0),
1444fN(0),
1445fDy5(0),
1446fDy10(0),
1447fDy20(0),
1448fClustersCs(0),
1449fClusterIndexCs(0),
1450fYcs(0),
1451fZcs(0),
1452fNcs(0),
1453fCurrentSlice(-1),
1454fZmax(0),
1455fYmin(0),
1456fYmax(0),
1457fI(0),
1458fImax(0),
1459fSkip(0),
1460fAccepted(0),
1461fRoad(0) {
1462 //--------------------------------------------------------------------
1463 //main AliITSlayer constructor
1464 //--------------------------------------------------------------------
1465 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1466 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
1467}
1468//------------------------------------------------------------------------
1469AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1470fR(layer.fR),
1471fPhiOffset(layer.fPhiOffset),
1472fNladders(layer.fNladders),
1473fZOffset(layer.fZOffset),
1474fNdetectors(layer.fNdetectors),
1475fDetectors(layer.fDetectors),
1476fN(layer.fN),
1477fDy5(layer.fDy5),
1478fDy10(layer.fDy10),
1479fDy20(layer.fDy20),
1480fClustersCs(layer.fClustersCs),
1481fClusterIndexCs(layer.fClusterIndexCs),
1482fYcs(layer.fYcs),
1483fZcs(layer.fZcs),
1484fNcs(layer.fNcs),
1485fCurrentSlice(layer.fCurrentSlice),
1486fZmax(layer.fZmax),
1487fYmin(layer.fYmin),
1488fYmax(layer.fYmax),
1489fI(layer.fI),
1490fImax(layer.fImax),
1491fSkip(layer.fSkip),
1492fAccepted(layer.fAccepted),
1493fRoad(layer.fRoad){
1494 //Copy constructor
1495}
1496//------------------------------------------------------------------------
1497AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1498 //--------------------------------------------------------------------
1499 // AliITSlayer destructor
1500 //--------------------------------------------------------------------
1501 delete [] fDetectors;
1502 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1503 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1504 fClusterWeight[i]=0;
1505 fClusterTracks[0][i]=-1;
1506 fClusterTracks[1][i]=-1;
1507 fClusterTracks[2][i]=-1;
1508 fClusterTracks[3][i]=-1;
1509 }
1510}
1511//------------------------------------------------------------------------
1512void AliITStrackerMI::AliITSlayer::ResetClusters() {
1513 //--------------------------------------------------------------------
1514 // This function removes loaded clusters
1515 //--------------------------------------------------------------------
1516 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1517 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++){
1518 fClusterWeight[i]=0;
1519 fClusterTracks[0][i]=-1;
1520 fClusterTracks[1][i]=-1;
1521 fClusterTracks[2][i]=-1;
1522 fClusterTracks[3][i]=-1;
1523 }
1524
1525 fN=0;
1526 fI=0;
1527}
1528//------------------------------------------------------------------------
1529void AliITStrackerMI::AliITSlayer::ResetWeights() {
1530 //--------------------------------------------------------------------
1531 // This function reset weights of the clusters
1532 //--------------------------------------------------------------------
1533 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1534 fClusterWeight[i]=0;
1535 fClusterTracks[0][i]=-1;
1536 fClusterTracks[1][i]=-1;
1537 fClusterTracks[2][i]=-1;
1538 fClusterTracks[3][i]=-1;
1539 }
1540 for (Int_t i=0; i<fN;i++) {
1541 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1542 if (cl&&cl->IsUsed()) cl->Use();
1543 }
1544
1545}
1546//------------------------------------------------------------------------
1547void AliITStrackerMI::AliITSlayer::ResetRoad() {
1548 //--------------------------------------------------------------------
1549 // This function calculates the road defined by the cluster density
1550 //--------------------------------------------------------------------
1551 Int_t n=0;
1552 for (Int_t i=0; i<fN; i++) {
1553 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1554 }
1555 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
1556}
1557//------------------------------------------------------------------------
1558Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
1559 //--------------------------------------------------------------------
1560 //This function adds a cluster to this layer
1561 //--------------------------------------------------------------------
1562 if (fN==AliITSRecoParam::GetMaxClusterPerLayer()) {
1563 ::Error("InsertCluster","Too many clusters !\n");
1564 return 1;
1565 }
1566 fCurrentSlice=-1;
1567 fClusters[fN]=cl;
1568 fN++;
1569 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
1570 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1571 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1572 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1573 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
1574
1575 return 0;
1576}
1577//------------------------------------------------------------------------
1578void AliITStrackerMI::AliITSlayer::SortClusters()
1579{
1580 //
1581 //sort clusters
1582 //
1583 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1584 Float_t *z = new Float_t[fN];
1585 Int_t * index = new Int_t[fN];
1586 //
1587 for (Int_t i=0;i<fN;i++){
1588 z[i] = fClusters[i]->GetZ();
1589 }
1590 TMath::Sort(fN,z,index,kFALSE);
1591 for (Int_t i=0;i<fN;i++){
1592 clusters[i] = fClusters[index[i]];
1593 }
1594 //
1595 for (Int_t i=0;i<fN;i++){
1596 fClusters[i] = clusters[i];
1597 fZ[i] = fClusters[i]->GetZ();
1598 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1599 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1600 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1601 fY[i] = y;
1602 }
1603 delete[] index;
1604 delete[] z;
1605 delete[] clusters;
1606 //
1607
1608 fYB[0]=10000000;
1609 fYB[1]=-10000000;
1610 for (Int_t i=0;i<fN;i++){
1611 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1612 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1613 fClusterIndex[i] = i;
1614 }
1615 //
1616 // fill slices
1617 fDy5 = (fYB[1]-fYB[0])/5.;
1618 fDy10 = (fYB[1]-fYB[0])/10.;
1619 fDy20 = (fYB[1]-fYB[0])/20.;
1620 for (Int_t i=0;i<6;i++) fN5[i] =0;
1621 for (Int_t i=0;i<11;i++) fN10[i]=0;
1622 for (Int_t i=0;i<21;i++) fN20[i]=0;
1623 //
1624 for (Int_t i=0;i<6;i++) {fBy5[i][0] = fYB[0]+(i-0.75)*fDy5; fBy5[i][1] = fYB[0]+(i+0.75)*fDy5;}
1625 for (Int_t i=0;i<11;i++) {fBy10[i][0] = fYB[0]+(i-0.75)*fDy10; fBy10[i][1] = fYB[0]+(i+0.75)*fDy10;}
1626 for (Int_t i=0;i<21;i++) {fBy20[i][0] = fYB[0]+(i-0.75)*fDy20; fBy20[i][1] = fYB[0]+(i+0.75)*fDy20;}
1627 //
1628 //
1629 for (Int_t i=0;i<fN;i++)
1630 for (Int_t irot=-1;irot<=1;irot++){
1631 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1632 // slice 5
1633 for (Int_t slice=0; slice<6;slice++){
1634 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<AliITSRecoParam::GetMaxClusterPerLayer5()){
1635 fClusters5[slice][fN5[slice]] = fClusters[i];
1636 fY5[slice][fN5[slice]] = curY;
1637 fZ5[slice][fN5[slice]] = fZ[i];
1638 fClusterIndex5[slice][fN5[slice]]=i;
1639 fN5[slice]++;
1640 }
1641 }
1642 // slice 10
1643 for (Int_t slice=0; slice<11;slice++){
1644 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<AliITSRecoParam::GetMaxClusterPerLayer10()){
1645 fClusters10[slice][fN10[slice]] = fClusters[i];
1646 fY10[slice][fN10[slice]] = curY;
1647 fZ10[slice][fN10[slice]] = fZ[i];
1648 fClusterIndex10[slice][fN10[slice]]=i;
1649 fN10[slice]++;
1650 }
1651 }
1652 // slice 20
1653 for (Int_t slice=0; slice<21;slice++){
1654 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<AliITSRecoParam::GetMaxClusterPerLayer20()){
1655 fClusters20[slice][fN20[slice]] = fClusters[i];
1656 fY20[slice][fN20[slice]] = curY;
1657 fZ20[slice][fN20[slice]] = fZ[i];
1658 fClusterIndex20[slice][fN20[slice]]=i;
1659 fN20[slice]++;
1660 }
1661 }
1662 }
1663
1664 //
1665 // consistency check
1666 //
1667 for (Int_t i=0;i<fN-1;i++){
1668 if (fZ[i]>fZ[i+1]){
1669 printf("Bug\n");
1670 }
1671 }
1672 //
1673 for (Int_t slice=0;slice<21;slice++)
1674 for (Int_t i=0;i<fN20[slice]-1;i++){
1675 if (fZ20[slice][i]>fZ20[slice][i+1]){
1676 printf("Bug\n");
1677 }
1678 }
1679
1680
1681}
1682//------------------------------------------------------------------------
1683Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1684 //--------------------------------------------------------------------
1685 // This function returns the index of the nearest cluster
1686 //--------------------------------------------------------------------
1687 Int_t ncl=0;
1688 const Float_t *zcl;
1689 if (fCurrentSlice<0) {
1690 ncl = fN;
1691 zcl = fZ;
1692 }
1693 else{
1694 ncl = fNcs;
1695 zcl = fZcs;;
1696 }
1697
1698 if (ncl==0) return 0;
1699 Int_t b=0, e=ncl-1, m=(b+e)/2;
1700 for (; b<e; m=(b+e)/2) {
1701 // if (z > fClusters[m]->GetZ()) b=m+1;
1702 if (z > zcl[m]) b=m+1;
1703 else e=m;
1704 }
1705 return m;
1706}
1707//------------------------------------------------------------------------
1708Bool_t AliITStrackerMI::ComputeRoad(AliITStrackMI* track,Int_t ilayer,Int_t idet,Double_t &zmin,Double_t &zmax,Double_t &ymin,Double_t &ymax) const {
1709 //--------------------------------------------------------------------
1710 // This function computes the rectangular road for this track
1711 //--------------------------------------------------------------------
1712
1713
1714 AliITSdetector &det = fgLayers[ilayer].GetDetector(idet);
1715 // take into account the misalignment: propagate track to misaligned detector plane
1716 if (!track->Propagate(det.GetPhi(),det.GetRmisal())) return kFALSE;
1717
1718 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
1719 TMath::Sqrt(track->GetSigmaZ2() +
1720 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1721 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1722 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
1723 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
1724 TMath::Sqrt(track->GetSigmaY2() +
1725 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1726 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1727 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
1728
1729 // track at boundary between detectors, enlarge road
1730 Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidth();
1731 if ( (track->GetY()-dy < det.GetYmin()+boundaryWidth) ||
1732 (track->GetY()+dy > det.GetYmax()-boundaryWidth) ||
1733 (track->GetZ()-dz < det.GetZmin()+boundaryWidth) ||
1734 (track->GetZ()+dz > det.GetZmax()-boundaryWidth) ) {
1735 Float_t tgl = TMath::Abs(track->GetTgl());
1736 if (tgl > 1.) tgl=1.;
1737 Double_t deltaXNeighbDets=AliITSRecoParam::GetDeltaXNeighbDets();
1738 dz = TMath::Sqrt(dz*dz+deltaXNeighbDets*deltaXNeighbDets*tgl*tgl);
1739 Float_t snp = TMath::Abs(track->GetSnp());
1740 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) return kFALSE;
1741 dy = TMath::Sqrt(dy*dy+deltaXNeighbDets*deltaXNeighbDets*snp*snp);
1742 } // boundary
1743
1744 // add to the road a term (up to 2-3 mm) to deal with misalignments
1745 dy = TMath::Sqrt(dy*dy + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1746 dz = TMath::Sqrt(dz*dz + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1747
1748 Double_t r = fgLayers[ilayer].GetR();
1749 zmin = track->GetZ() - dz;
1750 zmax = track->GetZ() + dz;
1751 ymin = track->GetY() + r*det.GetPhi() - dy;
1752 ymax = track->GetY() + r*det.GetPhi() + dy;
1753
1754 // bring track back to idead detector plane
1755 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
1756
1757 return kTRUE;
1758}
1759//------------------------------------------------------------------------
1760void AliITStrackerMI::AliITSlayer::
1761SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1762 //--------------------------------------------------------------------
1763 // This function sets the "window"
1764 //--------------------------------------------------------------------
1765
1766 Double_t circle=2*TMath::Pi()*fR;
1767 fYmin = ymin; fYmax =ymax;
1768 Float_t ymiddle = (fYmin+fYmax)*0.5;
1769 if (ymiddle<fYB[0]) {
1770 fYmin+=circle; fYmax+=circle; ymiddle+=circle;
1771 } else if (ymiddle>fYB[1]) {
1772 fYmin-=circle; fYmax-=circle; ymiddle-=circle;
1773 }
1774
1775 //
1776 fCurrentSlice =-1;
1777 // defualt take all
1778 fClustersCs = fClusters;
1779 fClusterIndexCs = fClusterIndex;
1780 fYcs = fY;
1781 fZcs = fZ;
1782 fNcs = fN;
1783 //
1784 //is in 20 slice?
1785 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1786 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1787 if (slice<0) slice=0;
1788 if (slice>20) slice=20;
1789 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1790 if (isOK) {
1791 fCurrentSlice=slice;
1792 fClustersCs = fClusters20[fCurrentSlice];
1793 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1794 fYcs = fY20[fCurrentSlice];
1795 fZcs = fZ20[fCurrentSlice];
1796 fNcs = fN20[fCurrentSlice];
1797 }
1798 }
1799 //
1800 //is in 10 slice?
1801 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1802 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1803 if (slice<0) slice=0;
1804 if (slice>10) slice=10;
1805 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1806 if (isOK) {
1807 fCurrentSlice=slice;
1808 fClustersCs = fClusters10[fCurrentSlice];
1809 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1810 fYcs = fY10[fCurrentSlice];
1811 fZcs = fZ10[fCurrentSlice];
1812 fNcs = fN10[fCurrentSlice];
1813 }
1814 }
1815 //
1816 //is in 5 slice?
1817 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1818 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1819 if (slice<0) slice=0;
1820 if (slice>5) slice=5;
1821 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1822 if (isOK) {
1823 fCurrentSlice=slice;
1824 fClustersCs = fClusters5[fCurrentSlice];
1825 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1826 fYcs = fY5[fCurrentSlice];
1827 fZcs = fZ5[fCurrentSlice];
1828 fNcs = fN5[fCurrentSlice];
1829 }
1830 }
1831 //
1832 fI=FindClusterIndex(zmin); fZmax=zmax;
1833 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1834 fSkip = 0;
1835 fAccepted =0;
1836
1837 return;
1838}
1839//------------------------------------------------------------------------
1840Int_t AliITStrackerMI::AliITSlayer::
1841FindDetectorIndex(Double_t phi, Double_t z) const {
1842 //--------------------------------------------------------------------
1843 //This function finds the detector crossed by the track
1844 //--------------------------------------------------------------------
1845 Double_t dphi;
1846 if (fZOffset<0) // old geometry
1847 dphi = -(phi-fPhiOffset);
1848 else // new geometry
1849 dphi = phi-fPhiOffset;
1850
1851
1852 if (dphi < 0) dphi += 2*TMath::Pi();
1853 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1854 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1855 if (np>=fNladders) np-=fNladders;
1856 if (np<0) np+=fNladders;
1857
1858
1859 Double_t dz=fZOffset-z;
1860 Double_t nnz = dz*(fNdetectors-1)*0.5/fZOffset+0.5;
1861 Int_t nz = (nnz<0 ? -1 : (Int_t)nnz);
1862 if (nz>=fNdetectors) return -1;
1863 if (nz<0) return -1;
1864
1865 // ad hoc correction for 3rd ladder of SDD inner layer,
1866 // which is reversed (rotated by pi around local y)
1867 // this correction is OK only from AliITSv11Hybrid onwards
1868 if (GetR()>12. && GetR()<20.) { // SDD inner
1869 if(np==2) { // 3rd ladder
1870 nz = (fNdetectors-1) - nz;
1871 }
1872 }
1873 //printf("ndet %d phi %f z %f np %d nz %d\n",fNdetectors,phi,z,np,nz);
1874
1875
1876 return np*fNdetectors + nz;
1877}
1878//------------------------------------------------------------------------
1879const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci,Bool_t test)
1880{
1881 //--------------------------------------------------------------------
1882 // This function returns clusters within the "window"
1883 //--------------------------------------------------------------------
1884
1885 if (fCurrentSlice<0) {
1886 Double_t rpi2 = 2.*fR*TMath::Pi();
1887 for (Int_t i=fI; i<fImax; i++) {
1888 Double_t y = fY[i];
1889 if (fYmax<y) y -= rpi2;
1890 if (fYmin>y) y += rpi2;
1891 if (y<fYmin) continue;
1892 if (y>fYmax) continue;
1893 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1894 ci=i;
1895 if (!test) fI=i+1;
1896 return fClusters[i];
1897 }
1898 } else {
1899 for (Int_t i=fI; i<fImax; i++) {
1900 if (fYcs[i]<fYmin) continue;
1901 if (fYcs[i]>fYmax) continue;
1902 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1903 ci=fClusterIndexCs[i];
1904 if (!test) fI=i+1;
1905 return fClustersCs[i];
1906 }
1907 }
1908 return 0;
1909}
1910//------------------------------------------------------------------------
1911Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1912const {
1913 //--------------------------------------------------------------------
1914 // This function returns the layer thickness at this point (units X0)
1915 //--------------------------------------------------------------------
1916 Double_t d=0.0085;
1917 x0=AliITSRecoParam::GetX0Air();
1918 if (43<fR&&fR<45) { //SSD2
1919 Double_t dd=0.0034;
1920 d=dd;
1921 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1922 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1923 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1924 for (Int_t i=0; i<12; i++) {
1925 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1926 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1927 d+=0.0034;
1928 break;
1929 }
1930 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1931 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1932 d+=0.0034;
1933 break;
1934 }
1935 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1936 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1937 }
1938 } else
1939 if (37<fR&&fR<41) { //SSD1
1940 Double_t dd=0.0034;
1941 d=dd;
1942 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1943 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1944 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1945 for (Int_t i=0; i<11; i++) {
1946 if (TMath::Abs(z-3.9*i)<0.15) {
1947 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1948 d+=dd;
1949 break;
1950 }
1951 if (TMath::Abs(z+3.9*i)<0.15) {
1952 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1953 d+=dd;
1954 break;
1955 }
1956 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1957 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1958 }
1959 } else
1960 if (13<fR&&fR<26) { //SDD
1961 Double_t dd=0.0033;
1962 d=dd;
1963 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1964
1965 if (TMath::Abs(y-1.80)<0.55) {
1966 d+=0.016;
1967 for (Int_t j=0; j<20; j++) {
1968 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1969 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1970 }
1971 }
1972 if (TMath::Abs(y+1.80)<0.55) {
1973 d+=0.016;
1974 for (Int_t j=0; j<20; j++) {
1975 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1976 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1977 }
1978 }
1979
1980 for (Int_t i=0; i<4; i++) {
1981 if (TMath::Abs(z-7.3*i)<0.60) {
1982 d+=dd;
1983 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1984 break;
1985 }
1986 if (TMath::Abs(z+7.3*i)<0.60) {
1987 d+=dd;
1988 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1989 break;
1990 }
1991 }
1992 } else
1993 if (6<fR&&fR<8) { //SPD2
1994 Double_t dd=0.0063; x0=21.5;
1995 d=dd;
1996 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1997 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
1998 } else
1999 if (3<fR&&fR<5) { //SPD1
2000 Double_t dd=0.0063; x0=21.5;
2001 d=dd;
2002 if (TMath::Abs(y+0.21)>0.6) d+=dd;
2003 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
2004 }
2005
2006 return d;
2007}
2008//------------------------------------------------------------------------
2009AliITStrackerMI::AliITSdetector::AliITSdetector(const AliITSdetector& det):
2010fR(det.fR),
2011fRmisal(det.fRmisal),
2012fPhi(det.fPhi),
2013fSinPhi(det.fSinPhi),
2014fCosPhi(det.fCosPhi),
2015fYmin(det.fYmin),
2016fYmax(det.fYmax),
2017fZmin(det.fZmin),
2018fZmax(det.fZmax),
2019fIsBad(det.fIsBad),
2020fNChips(det.fNChips),
2021fChipIsBad(det.fChipIsBad)
2022{
2023 //Copy constructor
2024}
2025//------------------------------------------------------------------------
2026void AliITStrackerMI::AliITSdetector::ReadBadDetectorAndChips(Int_t ilayer,Int_t idet,
2027 const AliITSDetTypeRec *detTypeRec)
2028{
2029 //--------------------------------------------------------------------
2030 // Read bad detectors and chips from calibration objects in AliITSDetTypeRec
2031 //--------------------------------------------------------------------
2032
2033 // In AliITSDetTypeRec, detector numbers go from 0 to 2197
2034 // while in the tracker they start from 0 for each layer
2035 for(Int_t il=0; il<ilayer; il++)
2036 idet += AliITSgeomTGeo::GetNLadders(il+1)*AliITSgeomTGeo::GetNDetectors(il+1);
2037
2038 Int_t detType;
2039 if (ilayer==0 || ilayer==1) { // ---------- SPD
2040 detType = 0;
2041 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
2042 detType = 1;
2043 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
2044 detType = 2;
2045 } else {
2046 printf("AliITStrackerMI::AliITSdetector::InitBadFromOCDB: Wrong layer number %d\n",ilayer);
2047 return;
2048 }
2049
2050 // Get calibration from AliITSDetTypeRec
2051 AliITSCalibration *calib = (AliITSCalibration*)detTypeRec->GetCalibrationModel(idet);
2052 calib->SetModuleIndex(idet);
2053 AliITSCalibration *calibSPDdead = 0;
2054 if(detType==0) calibSPDdead = (AliITSCalibration*)detTypeRec->GetSPDDeadModel(idet); // TEMPORARY
2055 if (calib->IsBad() ||
2056 (detType==0 && calibSPDdead->IsBad())) // TEMPORARY
2057 {
2058 SetBad();
2059 // printf("lay %d bad %d\n",ilayer,idet);
2060 }
2061
2062 // Get segmentation from AliITSDetTypeRec
2063 AliITSsegmentation *segm = (AliITSsegmentation*)detTypeRec->GetSegmentationModel(detType);
2064
2065 // Read info about bad chips
2066 fNChips = segm->GetMaximumChipIndex()+1;
2067 //printf("ilayer %d detType %d idet %d fNChips %d %d GetNumberOfChips %d\n",ilayer,detType,idet,fNChips,segm->GetMaximumChipIndex(),segm->GetNumberOfChips());
2068 if(fChipIsBad) { delete [] fChipIsBad; fChipIsBad=NULL; }
2069 fChipIsBad = new Bool_t[fNChips];
2070 for (Int_t iCh=0;iCh<fNChips;iCh++) {
2071 fChipIsBad[iCh] = calib->IsChipBad(iCh);
2072 if (detType==0 && calibSPDdead->IsChipBad(iCh)) fChipIsBad[iCh] = kTRUE; // TEMPORARY
2073 //if(fChipIsBad[iCh]) {printf("lay %d det %d bad chip %d\n",ilayer,idet,iCh);}
2074 }
2075
2076 return;
2077}
2078//------------------------------------------------------------------------
2079Double_t AliITStrackerMI::GetEffectiveThickness()
2080{
2081 //--------------------------------------------------------------------
2082 // Returns the thickness between the current layer and the vertex (units X0)
2083 //--------------------------------------------------------------------
2084
2085 if(fUseTGeo!=0) {
2086 if(fxOverX0Layer[0]<0) BuildMaterialLUT("Layers");
2087 if(fxOverX0Shield[0]<0) BuildMaterialLUT("Shields");
2088 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
2089 }
2090
2091 // beam pipe
2092 Double_t dPipe = (fUseTGeo==0 ? AliITSRecoParam::GetdPipe() : fxOverX0Pipe);
2093 Double_t d=dPipe*AliITSRecoParam::GetrPipe()*AliITSRecoParam::GetrPipe();
2094
2095 // layers
2096 Double_t x0=0;
2097 Double_t xn=fgLayers[fI].GetR();
2098 for (Int_t i=0; i<fI; i++) {
2099 Double_t xi=fgLayers[i].GetR();
2100 Double_t dLayer = (fUseTGeo==0 ? fgLayers[i].GetThickness(0,0,x0) : fxOverX0Layer[i]);
2101 d+=dLayer*xi*xi;
2102 }
2103
2104 // shields
2105 if (fI>1) {
2106 Double_t dshieldSPD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(0) : fxOverX0Shield[0]);
2107 d+=dshieldSPD*AliITSRecoParam::GetrInsideShield(0)*AliITSRecoParam::GetrInsideShield(0);
2108 }
2109 if (fI>3) {
2110 Double_t dshieldSDD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(1) : fxOverX0Shield[1]);
2111 d+=dshieldSDD*AliITSRecoParam::GetrInsideShield(1)*AliITSRecoParam::GetrInsideShield(1);
2112 }
2113 return d/(xn*xn);
2114}
2115//------------------------------------------------------------------------
2116Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
2117 //-------------------------------------------------------------------
2118 // This function returns number of clusters within the "window"
2119 //--------------------------------------------------------------------
2120 Int_t ncl=0;
2121 for (Int_t i=fI; i<fN; i++) {
2122 const AliITSRecPoint *c=fClusters[i];
2123 if (c->GetZ() > fZmax) break;
2124 if (c->IsUsed()) continue;
2125 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
2126 Double_t y=fR*det.GetPhi() + c->GetY();
2127
2128 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
2129 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
2130
2131 if (y<fYmin) continue;
2132 if (y>fYmax) continue;
2133 ncl++;
2134 }
2135 return ncl;
2136}
2137//------------------------------------------------------------------------
2138Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2139 const AliITStrackMI *clusters,Bool_t extra, Bool_t planeeff)
2140{
2141 //--------------------------------------------------------------------
2142 // This function refits the track "track" at the position "x" using
2143 // the clusters from "clusters"
2144 // If "extra"==kTRUE,
2145 // the clusters from overlapped modules get attached to "track"
2146 // If "planeff"==kTRUE,
2147 // special approach for plane efficiency evaluation is applyed
2148 //--------------------------------------------------------------------
2149
2150 Int_t index[AliITSgeomTGeo::kNLayers];
2151 Int_t k;
2152 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2153 Int_t nc=clusters->GetNumberOfClusters();
2154 for (k=0; k<nc; k++) {
2155 Int_t idx=clusters->GetClusterIndex(k);
2156 Int_t ilayer=(idx&0xf0000000)>>28;
2157 index[ilayer]=idx;
2158 }
2159
2160 return RefitAt(xx,track,index,extra,planeeff); // call the method below
2161}
2162//------------------------------------------------------------------------
2163Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2164 const Int_t *clusters,Bool_t extra, Bool_t planeeff)
2165{
2166 //--------------------------------------------------------------------
2167 // This function refits the track "track" at the position "x" using
2168 // the clusters from array
2169 // If "extra"==kTRUE,
2170 // the clusters from overlapped modules get attached to "track"
2171 // If "planeff"==kTRUE,
2172 // special approach for plane efficiency evaluation is applyed
2173 //--------------------------------------------------------------------
2174 Int_t index[AliITSgeomTGeo::kNLayers];
2175 Int_t k;
2176 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2177 //
2178 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
2179 index[k]=clusters[k];
2180 }
2181
2182 // special for cosmics: check which the innermost layer crossed
2183 // by the track
2184 Int_t innermostlayer=5;
2185 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
2186 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
2187 if(drphi < fgLayers[innermostlayer].GetR()) break;
2188 }
2189 //printf(" drphi %f innermost %d\n",drphi,innermostlayer);
2190
2191 Int_t modstatus=1; // found
2192 Float_t xloc,zloc;
2193 Int_t from, to, step;
2194 if (xx > track->GetX()) {
2195 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
2196 step=+1;
2197 } else {
2198 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
2199 step=-1;
2200 }
2201 TString dir = (step>0 ? "outward" : "inward");
2202
2203 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
2204 AliITSlayer &layer=fgLayers[ilayer];
2205 Double_t r=layer.GetR();
2206 if (step<0 && xx>r) break;
2207
2208 // material between SSD and SDD, SDD and SPD
2209 Double_t hI=ilayer-0.5*step;
2210 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
2211 if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
2212 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
2213 if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
2214
2215
2216 Double_t oldGlobXYZ[3];
2217 if (!track->GetXYZ(oldGlobXYZ)) return kFALSE;
2218
2219 Double_t phi,z;
2220 if (!track->GetPhiZat(r,phi,z)) return kFALSE;
2221
2222 Int_t idet=layer.FindDetectorIndex(phi,z);
2223
2224 // check if we allow a prolongation without point for large-eta tracks
2225 Int_t skip = CheckSkipLayer(track,ilayer,idet);
2226 if (skip==2) {
2227 modstatus = 4; // out in z
2228 if(LocalModuleCoord(ilayer,idet,track,xloc,zloc)) { // local module coords
2229 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2230 }
2231 // cross layer
2232 // apply correction for material of the current layer
2233 // add time if going outward
2234 CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir);
2235 continue;
2236 }
2237
2238 if (idet<0) return kFALSE;
2239
2240 const AliITSdetector &det=layer.GetDetector(idet);
2241 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
2242
2243 track->SetDetectorIndex(idet);
2244 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2245
2246 Double_t dz,zmin,zmax,dy,ymin,ymax;
2247
2248 const AliITSRecPoint *clAcc=0;
2249 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2250
2251 Int_t idx=index[ilayer];
2252 if (idx>=0) { // cluster in this layer
2253 modstatus = 6; // no refit
2254 const AliITSRecPoint *cl=(AliITSRecPoint *)GetCluster(idx);
2255 if (cl) {
2256 if (idet != cl->GetDetectorIndex()) {
2257 idet=cl->GetDetectorIndex();
2258 const AliITSdetector &detc=layer.GetDetector(idet);
2259 if (!track->Propagate(detc.GetPhi(),detc.GetR())) return kFALSE;
2260 track->SetDetectorIndex(idet);
2261 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2262 }
2263 Int_t cllayer = (idx & 0xf0000000) >> 28;;
2264 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
2265 if (chi2<maxchi2) {
2266 clAcc=cl;
2267 maxchi2=chi2;
2268 modstatus = 1; // found
2269 } else {
2270 return kFALSE; //
2271 }
2272 }
2273 } else { // no cluster in this layer
2274 if (skip==1) {
2275 modstatus = 3; // skipped
2276 // Plane Eff determination:
2277 if (planeeff && ilayer==AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()) {
2278 if (IsOKForPlaneEff(track,clusters,ilayer)) // only adequate track for plane eff. evaluation
2279 UseTrackForPlaneEff(track,ilayer);
2280 }
2281 } else {
2282 modstatus = 5; // no cls in road
2283 // check dead
2284 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2285 dz = 0.5*(zmax-zmin);
2286 dy = 0.5*(ymax-ymin);
2287 Int_t dead = CheckDeadZone(track,ilayer,idet,dz,dy,kTRUE);
2288 if (dead==1) modstatus = 7; // holes in z in SPD
2289 if (dead==2 || dead==3) modstatus = 2; // dead from OCDB
2290 }
2291 }
2292
2293 if (clAcc) {
2294 if (!UpdateMI(track,clAcc,maxchi2,idx)) return kFALSE;
2295 track->SetSampledEdx(clAcc->GetQ(),track->GetNumberOfClusters()-1);
2296 }
2297 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2298
2299
2300 if (extra) { // search for extra clusters in overlapped modules
2301 AliITStrackV2 tmp(*track);
2302 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2303 layer.SelectClusters(zmin,zmax,ymin,ymax);
2304
2305 const AliITSRecPoint *clExtra=0; Int_t ci=-1,cci=-1;
2306 Int_t idetExtra=-1;
2307 maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2308 Double_t tolerance=0.1;
2309 while ((clExtra=layer.GetNextCluster(ci))!=0) {
2310 // only clusters in another module! (overlaps)
2311 idetExtra = clExtra->GetDetectorIndex();
2312 if (idet == idetExtra) continue;
2313
2314 const AliITSdetector &detx=layer.GetDetector(idetExtra);
2315
2316 if (!tmp.Propagate(detx.GetPhi(),detx.GetR()+clExtra->GetX())) continue;
2317 if (TMath::Abs(tmp.GetZ() - clExtra->GetZ()) > tolerance) continue;
2318 if (TMath::Abs(tmp.GetY() - clExtra->GetY()) > tolerance) continue;
2319 if (!tmp.Propagate(detx.GetPhi(),detx.GetR())) continue;
2320
2321 Double_t chi2=tmp.GetPredictedChi2(clExtra);
2322 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
2323 }
2324 if (cci>=0) {
2325 track->SetExtraCluster(ilayer,(ilayer<<28)+cci);
2326 track->SetExtraModule(ilayer,idetExtra);
2327 }
2328 } // end search for extra clusters in overlapped modules
2329
2330 // Correct for material of the current layer
2331 // cross material
2332 // add time if going outward
2333 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)) return kFALSE;
2334
2335 } // end loop on layers
2336
2337 if (!track->PropagateTo(xx,0.,0.)) return kFALSE;
2338
2339 return kTRUE;
2340}
2341//------------------------------------------------------------------------
2342Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
2343{
2344 //
2345 // calculate normalized chi2
2346 // return NormalizedChi2(track,0);
2347 Float_t chi2 = 0;
2348 Float_t sum=0;
2349 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2350 // track->fdEdxMismatch=0;
2351 Float_t dedxmismatch =0;
2352 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2353 if (mode<100){
2354 for (Int_t i = 0;i<6;i++){
2355 if (track->GetClIndex(i)>=0){
2356 Float_t cerry, cerrz;
2357 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2358 else
2359 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2360 cerry*=cerry;
2361 cerrz*=cerrz;
2362 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
2363 if (i>1 && AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(i)) {
2364 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
2365 if (ratio<0.5) {
2366 cchi2+=(0.5-ratio)*10.;
2367 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2368 dedxmismatch+=(0.5-ratio)*10.;
2369 }
2370 }
2371 if (i<2 ||i>3){
2372 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
2373 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2374 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2375 if (i<2) chi2+=2*cl->GetDeltaProbability();
2376 }
2377 chi2+=cchi2;
2378 sum++;
2379 }
2380 }
2381 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2382 track->SetdEdxMismatch(dedxmismatch);
2383 }
2384 }
2385 else{
2386 for (Int_t i = 0;i<4;i++){
2387 if (track->GetClIndex(i)>=0){
2388 Float_t cerry, cerrz;
2389 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2390 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2391 cerry*=cerry;
2392 cerrz*=cerrz;
2393 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2394 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
2395 sum++;
2396 }
2397 }
2398 for (Int_t i = 4;i<6;i++){
2399 if (track->GetClIndex(i)>=0){
2400 Float_t cerry, cerrz;
2401 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2402 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2403 cerry*=cerry;
2404 cerrz*=cerrz;
2405 Float_t cerryb, cerrzb;
2406 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
2407 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
2408 cerryb*=cerryb;
2409 cerrzb*=cerrzb;
2410 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2411 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
2412 sum++;
2413 }
2414 }
2415 }
2416 if (track->GetESDtrack()->GetTPCsignal()>85){
2417 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
2418 if (ratio<0.5) {
2419 chi2+=(0.5-ratio)*5.;
2420 }
2421 if (ratio>2){
2422 chi2+=(ratio-2.0)*3;
2423 }
2424 }
2425 //
2426 Double_t match = TMath::Sqrt(track->GetChi22());
2427 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2428 if (!track->GetConstrain()) {
2429 if (track->GetNumberOfClusters()>2) {
2430 match/=track->GetNumberOfClusters()-2.;
2431 } else {
2432 match=0;
2433 }
2434 }
2435 if (match<0) match=0;
2436 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2437 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2438 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2439 1./(1.+track->GetNSkipped()));
2440
2441 return normchi2;
2442}
2443//------------------------------------------------------------------------
2444Double_t AliITStrackerMI::GetMatchingChi2(const AliITStrackMI * track1,const AliITStrackMI * track2)
2445{
2446 //
2447 // return matching chi2 between two tracks
2448 Double_t largeChi2=1000.;
2449
2450 AliITStrackMI track3(*track2);
2451 if (!track3.Propagate(track1->GetAlpha(),track1->GetX())) return largeChi2;
2452 TMatrixD vec(5,1);
2453 vec(0,0)=track1->GetY() - track3.GetY();
2454 vec(1,0)=track1->GetZ() - track3.GetZ();
2455 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2456 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2457 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
2458 //
2459 TMatrixD cov(5,5);
2460 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2461 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2462 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2463 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2464 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2465
2466 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2467 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2468 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2469 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2470 //
2471 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2472 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2473 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2474 //
2475 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2476 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2477 //
2478 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2479
2480 cov.Invert();
2481 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2482 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2483 return chi2(0,0);
2484}
2485//------------------------------------------------------------------------
2486Double_t AliITStrackerMI::GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr) const
2487{
2488 //
2489 // return probability that given point (characterized by z position and error)
2490 // is in SPD dead zone
2491 //
2492 Double_t probability = 0.;
2493 Double_t absz = TMath::Abs(zpos);
2494 Double_t nearestz = (absz<2.) ? 0.5*(fSPDdetzcentre[1]+fSPDdetzcentre[2]) :
2495 0.5*(fSPDdetzcentre[2]+fSPDdetzcentre[3]);
2496 if (TMath::Abs(absz-nearestz)>0.25+3.*zerr) return probability;
2497 Double_t zmin, zmax;
2498 if (zpos<-6.) { // dead zone at z = -7
2499 zmin = fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2500 zmax = fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2501 } else if (zpos>6.) { // dead zone at z = +7
2502 zmin = fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2503 zmax = fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2504 } else if (absz<2.) { // dead zone at z = 0
2505 zmin = fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2506 zmax = fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2507 } else {
2508 zmin = 0.;
2509 zmax = 0.;
2510 }
2511 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2512 // dead zone)
2513 probability = 0.5*( TMath::Erf((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2514 TMath::Erf((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
2515 return probability;
2516}
2517//------------------------------------------------------------------------
2518Double_t AliITStrackerMI::GetTruncatedChi2(const AliITStrackMI * track, Float_t fac)
2519{
2520 //
2521 // calculate normalized chi2
2522 Float_t chi2[6];
2523 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2524 Float_t ncl = 0;
2525 for (Int_t i = 0;i<6;i++){
2526 if (TMath::Abs(track->GetDy(i))>0){
2527 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2528 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2529 ncl++;
2530 }
2531 else{chi2[i]=10000;}
2532 }
2533 Int_t index[6];
2534 TMath::Sort(6,chi2,index,kFALSE);
2535 Float_t max = float(ncl)*fac-1.;
2536 Float_t sumchi=0, sumweight=0;
2537 for (Int_t i=0;i<max+1;i++){
2538 Float_t weight = (i<max)?1.:(max+1.-i);
2539 sumchi+=weight*chi2[index[i]];
2540 sumweight+=weight;
2541 }
2542 Double_t normchi2 = sumchi/sumweight;
2543 return normchi2;
2544}
2545//------------------------------------------------------------------------
2546Double_t AliITStrackerMI::GetInterpolatedChi2(const AliITStrackMI * forwardtrack,const AliITStrackMI * backtrack)
2547{
2548 //
2549 // calculate normalized chi2
2550 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2551 Int_t npoints = 0;
2552 Double_t res =0;
2553 for (Int_t i=0;i<6;i++){
2554 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2555 Double_t sy1 = forwardtrack->GetSigmaY(i);
2556 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2557 Double_t sy2 = backtrack->GetSigmaY(i);
2558 Double_t sz2 = backtrack->GetSigmaZ(i);
2559 if (i<2){ sy2=1000.;sz2=1000;}
2560 //
2561 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2562 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2563 //
2564 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2565 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2566 //
2567 res+= nz0*nz0+ny0*ny0;
2568 npoints++;
2569 }
2570 if (npoints>1) return
2571 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
2572 //2*forwardtrack->fNUsed+
2573 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2574 1./(1.+forwardtrack->GetNSkipped()));
2575 return 1000;
2576}
2577//------------------------------------------------------------------------
2578Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2579 //--------------------------------------------------------------------
2580 // Return pointer to a given cluster
2581 //--------------------------------------------------------------------
2582 Int_t l=(index & 0xf0000000) >> 28;
2583 Int_t c=(index & 0x0fffffff) >> 00;
2584 return fgLayers[l].GetWeight(c);
2585}
2586//------------------------------------------------------------------------
2587void AliITStrackerMI::RegisterClusterTracks(const AliITStrackMI* track,Int_t id)
2588{
2589 //---------------------------------------------
2590 // register track to the list
2591 //
2592 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2593 //
2594 //
2595 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2596 Int_t index = track->GetClusterIndex(icluster);
2597 Int_t l=(index & 0xf0000000) >> 28;
2598 Int_t c=(index & 0x0fffffff) >> 00;
2599 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2600 for (Int_t itrack=0;itrack<4;itrack++){
2601 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2602 fgLayers[l].SetClusterTracks(itrack,c,id);
2603 break;
2604 }
2605 }
2606 }
2607}
2608//------------------------------------------------------------------------
2609void AliITStrackerMI::UnRegisterClusterTracks(const AliITStrackMI* track, Int_t id)
2610{
2611 //---------------------------------------------
2612 // unregister track from the list
2613 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2614 Int_t index = track->GetClusterIndex(icluster);
2615 Int_t l=(index & 0xf0000000) >> 28;
2616 Int_t c=(index & 0x0fffffff) >> 00;
2617 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2618 for (Int_t itrack=0;itrack<4;itrack++){
2619 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2620 fgLayers[l].SetClusterTracks(itrack,c,-1);
2621 }
2622 }
2623 }
2624}
2625//------------------------------------------------------------------------
2626Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2627{
2628 //-------------------------------------------------------------
2629 //get number of shared clusters
2630 //-------------------------------------------------------------
2631 Float_t shared=0;
2632 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2633 // mean number of clusters
2634 Float_t *ny = GetNy(id), *nz = GetNz(id);
2635
2636
2637 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2638 Int_t index = track->GetClusterIndex(icluster);
2639 Int_t l=(index & 0xf0000000) >> 28;
2640 Int_t c=(index & 0x0fffffff) >> 00;
2641 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2642 if (ny[l]==0){
2643 printf("problem\n");
2644 }
2645 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2646 Float_t weight=1;
2647 //
2648 Float_t deltan = 0;
2649 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2650 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2651 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2652 if (l<2 || l>3){
2653 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2654 }
2655 else{
2656 deltan = (cl->GetNz()-nz[l]);
2657 }
2658 if (deltan>2.0) continue; // extended - highly probable shared cluster
2659 weight = 2./TMath::Max(3.+deltan,2.);
2660 //
2661 for (Int_t itrack=0;itrack<4;itrack++){
2662 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2663 list[l]=index;
2664 clist[l] = (AliITSRecPoint*)GetCluster(index);
2665 shared+=weight;
2666 break;
2667 }
2668 }
2669 }
2670 track->SetNUsed(shared);
2671 return shared;
2672}
2673//------------------------------------------------------------------------
2674Int_t AliITStrackerMI::GetOverlapTrack(const AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2675{
2676 //
2677 // find first shared track
2678 //
2679 // mean number of clusters
2680 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2681 //
2682 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2683 Int_t sharedtrack=100000;
2684 Int_t tracks[24],trackindex=0;
2685 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2686 //
2687 for (Int_t icluster=0;icluster<6;icluster++){
2688 if (clusterlist[icluster]<0) continue;
2689 Int_t index = clusterlist[icluster];
2690 Int_t l=(index & 0xf0000000) >> 28;
2691 Int_t c=(index & 0x0fffffff) >> 00;
2692 if (ny[l]==0){
2693 printf("problem\n");
2694 }
2695 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2696 //if (l>3) continue;
2697 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2698 //
2699 Float_t deltan = 0;
2700 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2701 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2702 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2703 if (l<2 || l>3){
2704 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2705 }
2706 else{
2707 deltan = (cl->GetNz()-nz[l]);
2708 }
2709 if (deltan>2.0) continue; // extended - highly probable shared cluster
2710 //
2711 for (Int_t itrack=3;itrack>=0;itrack--){
2712 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2713 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2714 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2715 trackindex++;
2716 }
2717 }
2718 }
2719 if (trackindex==0) return -1;
2720 if (trackindex==1){
2721 sharedtrack = tracks[0];
2722 }else{
2723 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2724 else{
2725 //
2726 Int_t tracks2[24], cluster[24];
2727 for (Int_t i=0;i<trackindex;i++){ tracks2[i]=-1; cluster[i]=0;}
2728 Int_t index =0;
2729 //
2730 for (Int_t i=0;i<trackindex;i++){
2731 if (tracks[i]<0) continue;
2732 tracks2[index] = tracks[i];
2733 cluster[index]++;
2734 for (Int_t j=i+1;j<trackindex;j++){
2735 if (tracks[j]<0) continue;
2736 if (tracks[j]==tracks[i]){
2737 cluster[index]++;
2738 tracks[j]=-1;
2739 }
2740 }
2741 index++;
2742 }
2743 Int_t max=0;
2744 for (Int_t i=0;i<index;i++){
2745 if (cluster[index]>max) {
2746 sharedtrack=tracks2[index];
2747 max=cluster[index];
2748 }
2749 }
2750 }
2751 }
2752
2753 if (sharedtrack>=100000) return -1;
2754 //
2755 // make list of overlaps
2756 shared =0;
2757 for (Int_t icluster=0;icluster<6;icluster++){
2758 if (clusterlist[icluster]<0) continue;
2759 Int_t index = clusterlist[icluster];
2760 Int_t l=(index & 0xf0000000) >> 28;
2761 Int_t c=(index & 0x0fffffff) >> 00;
2762 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2763 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2764 if (l==0 || l==1){
2765 if (cl->GetNy()>2) continue;
2766 if (cl->GetNz()>2) continue;
2767 }
2768 if (l==4 || l==5){
2769 if (cl->GetNy()>3) continue;
2770 if (cl->GetNz()>3) continue;
2771 }
2772 //
2773 for (Int_t itrack=3;itrack>=0;itrack--){
2774 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2775 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
2776 overlist[l]=index;
2777 shared++;
2778 }
2779 }
2780 }
2781 return sharedtrack;
2782}
2783//------------------------------------------------------------------------
2784AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2785 //
2786 // try to find track hypothesys without conflicts
2787 // with minimal chi2;
2788 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2789 Int_t entries1 = arr1->GetEntriesFast();
2790 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2791 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2792 Int_t entries2 = arr2->GetEntriesFast();
2793 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2794 //
2795 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2796 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2797 if (track10->Pt()>0.5+track20->Pt()) return track10;
2798
2799 for (Int_t itrack=0;itrack<entries1;itrack++){
2800 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2801 UnRegisterClusterTracks(track,trackID1);
2802 }
2803 //
2804 for (Int_t itrack=0;itrack<entries2;itrack++){
2805 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2806 UnRegisterClusterTracks(track,trackID2);
2807 }
2808 Int_t index1=0;
2809 Int_t index2=0;
2810 Float_t maxconflicts=6;
2811 Double_t maxchi2 =1000.;
2812 //
2813 // get weight of hypothesys - using best hypothesy
2814 Double_t w1,w2;
2815
2816 Int_t list1[6],list2[6];
2817 AliITSRecPoint *clist1[6], *clist2[6] ;
2818 RegisterClusterTracks(track10,trackID1);
2819 RegisterClusterTracks(track20,trackID2);
2820 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2821 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2822 UnRegisterClusterTracks(track10,trackID1);
2823 UnRegisterClusterTracks(track20,trackID2);
2824 //
2825 // normalized chi2
2826 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2827 Float_t nerry[6],nerrz[6];
2828 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2829 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2830 for (Int_t i=0;i<6;i++){
2831 if ( (erry1[i]>0) && (erry2[i]>0)) {
2832 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2833 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2834 }else{
2835 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2836 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2837 }
2838 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2839 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2840 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
2841 ncl1++;
2842 }
2843 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2844 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2845 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
2846 ncl2++;
2847 }
2848 }
2849 chi21/=ncl1;
2850 chi22/=ncl2;
2851 //
2852 //
2853 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2854 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
2855 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2856 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2857 //
2858 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2859 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2860 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
2861 );
2862 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2863 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2864 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
2865 );
2866
2867 Double_t sumw = w1+w2;
2868 w1/=sumw;
2869 w2/=sumw;
2870 if (w1<w2*0.5) {
2871 w1 = (d2+0.5)/(d1+d2+1.);
2872 w2 = (d1+0.5)/(d1+d2+1.);
2873 }
2874 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2875 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2876 //
2877 // get pair of "best" hypothesys
2878 //
2879 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2880 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2881
2882 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
2883 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
2884 //if (track1->fFakeRatio>0) continue;
2885 RegisterClusterTracks(track1,trackID1);
2886 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
2887 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
2888
2889 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2890 //if (track2->fFakeRatio>0) continue;
2891 Float_t nskipped=0;
2892 RegisterClusterTracks(track2,trackID2);
2893 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2894 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2895 UnRegisterClusterTracks(track2,trackID2);
2896 //
2897 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2898 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
2899 if (nskipped>0.5) continue;
2900 //
2901 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2902 if (conflict1+1<cconflict1) continue;
2903 if (conflict2+1<cconflict2) continue;
2904 Float_t conflict=0;
2905 Float_t sumchi2=0;
2906 Float_t sum=0;
2907 for (Int_t i=0;i<6;i++){
2908 //
2909 Float_t c1 =0.; // conflict coeficients
2910 Float_t c2 =0.;
2911 if (clist1[i]&&clist2[i]){
2912 Float_t deltan = 0;
2913 if (i<2 || i>3){
2914 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2915 }
2916 else{
2917 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2918 }
2919 c1 = 2./TMath::Max(3.+deltan,2.);
2920 c2 = 2./TMath::Max(3.+deltan,2.);
2921 }
2922 else{
2923 if (clist1[i]){
2924 Float_t deltan = 0;
2925 if (i<2 || i>3){
2926 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2927 }
2928 else{
2929 deltan = (clist1[i]->GetNz()-nz1[i]);
2930 }
2931 c1 = 2./TMath::Max(3.+deltan,2.);
2932 c2 = 0;
2933 }
2934
2935 if (clist2[i]){
2936 Float_t deltan = 0;
2937 if (i<2 || i>3){
2938 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2939 }
2940 else{
2941 deltan = (clist2[i]->GetNz()-nz2[i]);
2942 }
2943 c2 = 2./TMath::Max(3.+deltan,2.);
2944 c1 = 0;
2945 }
2946 }
2947 //
2948 chi21=0;chi22=0;
2949 if (TMath::Abs(track1->GetDy(i))>0.) {
2950 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2951 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
2952 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2953 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
2954 }else{
2955 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
2956 }
2957 //
2958 if (TMath::Abs(track2->GetDy(i))>0.) {
2959 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2960 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
2961 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2962 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2963 }
2964 else{
2965 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
2966 }
2967 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2968 if (chi21>0) sum+=w1;
2969 if (chi22>0) sum+=w2;
2970 conflict+=(c1+c2);
2971 }
2972 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2973 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
2974 Double_t normchi2 = 2*conflict+sumchi2/sum;
2975 if ( normchi2 <maxchi2 ){
2976 index1 = itrack1;
2977 index2 = itrack2;
2978 maxconflicts = conflict;
2979 maxchi2 = normchi2;
2980 }
2981 }
2982 UnRegisterClusterTracks(track1,trackID1);
2983 }
2984 //
2985 // if (maxconflicts<4 && maxchi2<th0){
2986 if (maxchi2<th0*2.){
2987 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
2988 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
2989 track1->SetChi2MIP(5,maxconflicts);
2990 track1->SetChi2MIP(6,maxchi2);
2991 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
2992 // track1->UpdateESDtrack(AliESDtrack::kITSin);
2993 track1->SetChi2MIP(8,index1);
2994 fBestTrackIndex[trackID1] =index1;
2995 UpdateESDtrack(track1, AliESDtrack::kITSin);
2996 }
2997 else if (track10->GetChi2MIP(0)<th1){
2998 track10->SetChi2MIP(5,maxconflicts);
2999 track10->SetChi2MIP(6,maxchi2);
3000 // track10->UpdateESDtrack(AliESDtrack::kITSin);
3001 UpdateESDtrack(track10,AliESDtrack::kITSin);
3002 }
3003
3004 for (Int_t itrack=0;itrack<entries1;itrack++){
3005 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
3006 UnRegisterClusterTracks(track,trackID1);
3007 }
3008 //
3009 for (Int_t itrack=0;itrack<entries2;itrack++){
3010 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
3011 UnRegisterClusterTracks(track,trackID2);
3012 }
3013
3014 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3015 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3016 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3017 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3018 RegisterClusterTracks(track10,trackID1);
3019 }
3020 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3021 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3022 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3023 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3024 RegisterClusterTracks(track20,trackID2);
3025 }
3026 return track10;
3027
3028}
3029//------------------------------------------------------------------------
3030void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
3031 //--------------------------------------------------------------------
3032 // This function marks clusters assigned to the track
3033 //--------------------------------------------------------------------
3034 AliTracker::UseClusters(t,from);
3035
3036 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
3037 //if (c->GetQ()>2) c->Use();
3038 if (c->GetSigmaZ2()>0.1) c->Use();
3039 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
3040 //if (c->GetQ()>2) c->Use();
3041 if (c->GetSigmaZ2()>0.1) c->Use();
3042
3043}
3044//------------------------------------------------------------------------
3045void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
3046{
3047 //------------------------------------------------------------------
3048 // add track to the list of hypothesys
3049 //------------------------------------------------------------------
3050
3051 if (esdindex>=fTrackHypothesys.GetEntriesFast())
3052 fTrackHypothesys.Expand(TMath::Max(fTrackHypothesys.GetSize(),esdindex*2+10));
3053 //
3054 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3055 if (!array) {
3056 array = new TObjArray(10);
3057 fTrackHypothesys.AddAt(array,esdindex);
3058 }
3059 array->AddLast(track);
3060}
3061//------------------------------------------------------------------------
3062void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
3063{
3064 //-------------------------------------------------------------------
3065 // compress array of track hypothesys
3066 // keep only maxsize best hypothesys
3067 //-------------------------------------------------------------------
3068 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
3069 if (! (fTrackHypothesys.At(esdindex)) ) return;
3070 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3071 Int_t entries = array->GetEntriesFast();
3072 //
3073 //- find preliminary besttrack as a reference
3074 Float_t minchi2=10000;
3075 Int_t maxn=0;
3076 AliITStrackMI * besttrack=0;
3077 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
3078 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3079 if (!track) continue;
3080 Float_t chi2 = NormalizedChi2(track,0);
3081 //
3082 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
3083 track->SetLabel(tpcLabel);
3084 CookdEdx(track);
3085 track->SetFakeRatio(1.);
3086 CookLabel(track,0.); //For comparison only
3087 //
3088 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
3089 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3090 if (track->GetNumberOfClusters()<maxn) continue;
3091 maxn = track->GetNumberOfClusters();
3092 if (chi2<minchi2){
3093 minchi2=chi2;
3094 besttrack=track;
3095 }
3096 }
3097 else{
3098 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3099 delete array->RemoveAt(itrack);
3100 }
3101 }
3102 }
3103 if (!besttrack) return;
3104 //
3105 //
3106 //take errors of best track as a reference
3107 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
3108 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3109 for (Int_t j=0;j<6;j++) {
3110 if (besttrack->GetClIndex(j)>=0){
3111 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3112 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3113 ny[j] = besttrack->GetNy(j);
3114 nz[j] = besttrack->GetNz(j);
3115 }
3116 }
3117 //
3118 // calculate normalized chi2
3119 //
3120 Float_t * chi2 = new Float_t[entries];
3121 Int_t * index = new Int_t[entries];
3122 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3123 for (Int_t itrack=0;itrack<entries;itrack++){
3124 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3125 if (track){
3126 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
3127 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3128 chi2[itrack] = track->GetChi2MIP(0);
3129 else{
3130 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3131 delete array->RemoveAt(itrack);
3132 }
3133 }
3134 }
3135 }
3136 //
3137 TMath::Sort(entries,chi2,index,kFALSE);
3138 besttrack = (AliITStrackMI*)array->At(index[0]);
3139 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3140 for (Int_t j=0;j<6;j++){
3141 if (besttrack->GetClIndex(j)>=0){
3142 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3143 errz[j] = besttrack->GetSigmaZ(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3144 ny[j] = besttrack->GetNy(j);
3145 nz[j] = besttrack->GetNz(j);
3146 }
3147 }
3148 }
3149 //
3150 // calculate one more time with updated normalized errors
3151 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3152 for (Int_t itrack=0;itrack<entries;itrack++){
3153 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3154 if (track){
3155 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3156 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3157 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
3158 else
3159 {
3160 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3161 delete array->RemoveAt(itrack);
3162 }
3163 }
3164 }
3165 }
3166 entries = array->GetEntriesFast();
3167 //
3168 //
3169 if (entries>0){
3170 TObjArray * newarray = new TObjArray();
3171 TMath::Sort(entries,chi2,index,kFALSE);
3172 besttrack = (AliITStrackMI*)array->At(index[0]);
3173 if (besttrack){
3174 //
3175 for (Int_t j=0;j<6;j++){
3176 if (besttrack->GetNz(j)>0&&besttrack->GetNy(j)>0){
3177 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3178 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3179 ny[j] = besttrack->GetNy(j);
3180 nz[j] = besttrack->GetNz(j);
3181 }
3182 }
3183 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
3184 minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
3185 Float_t minn = besttrack->GetNumberOfClusters()-3;
3186 Int_t accepted=0;
3187 for (Int_t i=0;i<entries;i++){
3188 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
3189 if (!track) continue;
3190 if (accepted>maxcut) break;
3191 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3192 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3193 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
3194 delete array->RemoveAt(index[i]);
3195 continue;
3196 }
3197 }
3198 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
3199 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
3200 if (!shortbest) accepted++;
3201 //
3202 newarray->AddLast(array->RemoveAt(index[i]));
3203 for (Int_t j=0;j<6;j++){
3204 if (nz[j]==0){
3205 erry[j] = track->GetSigmaY(j); erry[j+6] = track->GetSigmaY(j+6);
3206 errz[j] = track->GetSigmaZ(j); errz[j] = track->GetSigmaZ(j+6);
3207 ny[j] = track->GetNy(j);
3208 nz[j] = track->GetNz(j);
3209 }
3210 }
3211 }
3212 else{
3213 delete array->RemoveAt(index[i]);
3214 }
3215 }
3216 array->Delete();
3217 delete fTrackHypothesys.RemoveAt(esdindex);
3218 fTrackHypothesys.AddAt(newarray,esdindex);
3219 }
3220 else{
3221 array->Delete();
3222 delete fTrackHypothesys.RemoveAt(esdindex);
3223 }
3224 }
3225 delete [] chi2;
3226 delete [] index;
3227}
3228//------------------------------------------------------------------------
3229AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
3230{
3231 //-------------------------------------------------------------
3232 // try to find best hypothesy
3233 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
3234 //-------------------------------------------------------------
3235 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
3236 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3237 if (!array) return 0;
3238 Int_t entries = array->GetEntriesFast();
3239 if (!entries) return 0;
3240 Float_t minchi2 = 100000;
3241 AliITStrackMI * besttrack=0;
3242 //
3243 AliITStrackMI * backtrack = new AliITStrackMI(*original);
3244 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
3245 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
3246 Double_t ersVtx[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
3247 //
3248 for (Int_t i=0;i<entries;i++){
3249 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3250 if (!track) continue;
3251 Float_t sigmarfi,sigmaz;
3252 GetDCASigma(track,sigmarfi,sigmaz);
3253 track->SetDnorm(0,sigmarfi);
3254 track->SetDnorm(1,sigmaz);
3255 //
3256 track->SetChi2MIP(1,1000000);
3257 track->SetChi2MIP(2,1000000);
3258 track->SetChi2MIP(3,1000000);
3259 //
3260 // backtrack
3261 backtrack = new(backtrack) AliITStrackMI(*track);
3262 if (track->GetConstrain()) {
3263 if (!CorrectForPipeMaterial(backtrack,"inward")) continue;
3264 if (!backtrack->Improve(0,xyzVtx,ersVtx)) continue;
3265 backtrack->ResetCovariance(10.);
3266 }else{
3267 backtrack->ResetCovariance(10.);
3268 }
3269 backtrack->ResetClusters();
3270
3271 Double_t x = original->GetX();
3272 if (!RefitAt(x,backtrack,track)) continue;
3273 //
3274 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
3275 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
3276 if (track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)*6.) continue;
3277 track->SetChi22(GetMatchingChi2(backtrack,original));
3278
3279 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
3280 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
3281 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
3282
3283
3284 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)) continue;
3285 //
3286 //forward track - without constraint
3287 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
3288 forwardtrack->ResetClusters();
3289 x = track->GetX();
3290 RefitAt(x,forwardtrack,track);
3291 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
3292 if (track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)*6.0) continue;
3293 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)) continue;
3294
3295 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
3296 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3297 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
3298 forwardtrack->SetD(0,track->GetD(0));
3299 forwardtrack->SetD(1,track->GetD(1));
3300 {
3301 Int_t list[6];
3302 AliITSRecPoint* clist[6];
3303 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
3304 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
3305 }
3306
3307 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
3308 if ( (track->GetChi2MIP(3)>6.*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) continue;
3309 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) {
3310 track->SetChi2MIP(3,1000);
3311 continue;
3312 }
3313 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
3314 //
3315 for (Int_t ichi=0;ichi<5;ichi++){
3316 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
3317 }
3318 if (chi2 < minchi2){
3319 //besttrack = new AliITStrackMI(*forwardtrack);
3320 besttrack = track;
3321 besttrack->SetLabel(track->GetLabel());
3322 besttrack->SetFakeRatio(track->GetFakeRatio());
3323 minchi2 = chi2;
3324 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
3325 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3326 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
3327 }
3328 }
3329 delete backtrack;
3330 delete forwardtrack;
3331 Int_t accepted=0;
3332 for (Int_t i=0;i<entries;i++){
3333 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3334
3335 if (!track) continue;
3336
3337 if (accepted>checkmax || track->GetChi2MIP(3)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)*6. ||
3338 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
3339 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
3340 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3341 delete array->RemoveAt(i);
3342 continue;
3343 }
3344 }
3345 else{
3346 accepted++;
3347 }
3348 }
3349 //
3350 array->Compress();
3351 SortTrackHypothesys(esdindex,checkmax,1);
3352
3353 array = (TObjArray*) fTrackHypothesys.At(esdindex);
3354 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
3355 besttrack = (AliITStrackMI*)array->At(0);
3356 if (!besttrack) return 0;
3357 besttrack->SetChi2MIP(8,0);
3358 fBestTrackIndex[esdindex]=0;
3359 entries = array->GetEntriesFast();
3360 AliITStrackMI *longtrack =0;
3361 minchi2 =1000;
3362 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
3363 for (Int_t itrack=entries-1;itrack>0;itrack--) {
3364 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3365 if (!track->GetConstrain()) continue;
3366 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3367 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
3368 if (track->GetChi2MIP(0)>4.) continue;
3369 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
3370 longtrack =track;
3371 }
3372 //if (longtrack) besttrack=longtrack;
3373
3374 Int_t list[6];
3375 AliITSRecPoint * clist[6];
3376 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3377 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&besttrack->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3378 &&besttrack->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&besttrack->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3379 RegisterClusterTracks(besttrack,esdindex);
3380 }
3381 //
3382 //
3383 if (shared>0.0){
3384 Int_t nshared;
3385 Int_t overlist[6];
3386 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
3387 if (sharedtrack>=0){
3388 //
3389 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
3390 if (besttrack){
3391 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3392 }
3393 else return 0;
3394 }
3395 }
3396
3397 if (shared>2.5) return 0;
3398 if (shared>1.0) return besttrack;
3399 //
3400 // Don't sign clusters if not gold track
3401 //
3402 if (!besttrack->IsGoldPrimary()) return besttrack;
3403 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
3404 //
3405 if (fConstraint[fPass]){
3406 //
3407 // sign clusters
3408 //
3409 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3410 for (Int_t i=0;i<6;i++){
3411 Int_t index = besttrack->GetClIndex(i);
3412 if (index<0) continue;
3413 Int_t ilayer = (index & 0xf0000000) >> 28;
3414 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
3415 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
3416 if (!c) continue;
3417 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3418 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3419 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
3420 if ( ilayer>2&& AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(ilayer))
3421 if (besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
3422 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3423
3424 Bool_t cansign = kTRUE;
3425 for (Int_t itrack=0;itrack<entries; itrack++){
3426 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3427 if (!track) continue;
3428 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3429 if ( (track->GetClIndex(ilayer)>=0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
3430 cansign = kFALSE;
3431 break;
3432 }
3433 }
3434 if (cansign){
3435 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3436 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
3437 if (!c->IsUsed()) c->Use();
3438 }
3439 }
3440 }
3441 return besttrack;
3442}
3443//------------------------------------------------------------------------
3444void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3445{
3446 //
3447 // get "best" hypothesys
3448 //
3449
3450 Int_t nentries = itsTracks.GetEntriesFast();
3451 for (Int_t i=0;i<nentries;i++){
3452 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3453 if (!track) continue;
3454 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3455 if (!array) continue;
3456 if (array->GetEntriesFast()<=0) continue;
3457 //
3458 AliITStrackMI* longtrack=0;
3459 Float_t minn=0;
3460 Float_t maxchi2=1000;
3461 for (Int_t j=0;j<array->GetEntriesFast();j++){
3462 AliITStrackMI* trackHyp = (AliITStrackMI*)array->At(j);
3463 if (!trackHyp) continue;
3464 if (trackHyp->GetGoldV0()) {
3465 longtrack = trackHyp; //gold V0 track taken
3466 break;
3467 }
3468 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()<minn) continue;
3469 Float_t chi2 = trackHyp->GetChi2MIP(0);
3470 if (fAfterV0){
3471 if (!trackHyp->GetGoldV0()&&trackHyp->GetConstrain()==kFALSE) chi2+=5;
3472 }
3473 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()>minn) maxchi2 = trackHyp->GetChi2MIP(0);
3474 //
3475 if (chi2 > maxchi2) continue;
3476 minn= trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone();
3477 maxchi2 = chi2;
3478 longtrack=trackHyp;
3479 }
3480 //
3481 //
3482 //
3483 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3484 if (!longtrack) {longtrack = besttrack;}
3485 else besttrack= longtrack;
3486 //
3487 if (besttrack) {
3488 Int_t list[6];
3489 AliITSRecPoint * clist[6];
3490 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3491 //
3492 track->SetNUsed(shared);
3493 track->SetNSkipped(besttrack->GetNSkipped());
3494 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3495 if (shared>0) {
3496 if(!AliITSReconstructor::GetRecoParam()->GetAllowSharedClusters()) continue;
3497 Int_t nshared;
3498 Int_t overlist[6];
3499 //
3500 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3501 //if (sharedtrack==-1) sharedtrack=0;
3502 if (sharedtrack>=0) {
3503 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3504 }
3505 }
3506 if (besttrack&&fAfterV0) {
3507 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3508 }
3509 if (besttrack&&fConstraint[fPass])
3510 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3511 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5 && fConstraint[fPass]) {
3512 if ( TMath::Abs(besttrack->GetD(0))>0.1 ||
3513 TMath::Abs(besttrack->GetD(1))>0.1 ) track->SetReconstructed(kFALSE);
3514 }
3515
3516 }
3517 }
3518}
3519//------------------------------------------------------------------------
3520void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3521 //--------------------------------------------------------------------
3522 //This function "cooks" a track label. If label<0, this track is fake.
3523 //--------------------------------------------------------------------
3524 Int_t tpcLabel=-1;
3525
3526 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3527
3528 track->SetChi2MIP(9,0);
3529 Int_t nwrong=0;
3530 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3531 Int_t cindex = track->GetClusterIndex(i);
3532 Int_t l=(cindex & 0xf0000000) >> 28;
3533 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3534 Int_t isWrong=1;
3535 for (Int_t ind=0;ind<3;ind++){
3536 if (tpcLabel>0)
3537 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3538 AliDebug(2,Form("icl %d ilab %d lab %d",i,ind,cl->GetLabel(ind)));
3539 }
3540 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3541 nwrong+=isWrong;
3542 }
3543 Int_t nclusters = track->GetNumberOfClusters();
3544 if (nclusters > 0) //PH Some tracks don't have any cluster
3545 track->SetFakeRatio(double(nwrong)/double(nclusters));
3546 if (tpcLabel>0){
3547 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
3548 else
3549 track->SetLabel(tpcLabel);
3550 }
3551 AliDebug(2,Form(" nls %d wrong %d label %d tpcLabel %d\n",nclusters,nwrong,track->GetLabel(),tpcLabel));
3552
3553}
3554//------------------------------------------------------------------------
3555void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
3556{
3557 //
3558 //
3559 // Int_t list[6];
3560 //AliITSRecPoint * clist[6];
3561 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3562 Float_t dedx[4];
3563 Int_t accepted=0;
3564 track->SetChi2MIP(9,0);
3565 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3566 Int_t cindex = track->GetClusterIndex(i);
3567 Int_t l=(cindex & 0xf0000000) >> 28;
3568 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3569 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3570 Int_t isWrong=1;
3571 for (Int_t ind=0;ind<3;ind++){
3572 if (cl->GetLabel(ind)==lab) isWrong=0;
3573 }
3574 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3575 if (l<2) continue;
3576 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3577 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3578 //if (l<4&& !(cl->GetType()==1)) continue;
3579 dedx[accepted]= track->GetSampledEdx(i);
3580 //dedx[accepted]= track->fNormQ[l];
3581 accepted++;
3582 }
3583 if (accepted<1) {
3584 track->SetdEdx(0);
3585 return;
3586 }
3587 Int_t indexes[4];
3588 TMath::Sort(accepted,dedx,indexes,kFALSE);
3589 Double_t low=0.;
3590 Double_t up=0.51;
3591 Double_t nl=low*accepted, nu =up*accepted;
3592 Float_t sumamp = 0;
3593 Float_t sumweight =0;
3594 for (Int_t i=0; i<accepted; i++) {
3595 Float_t weight =1;
3596 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3597 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3598 sumamp+= dedx[indexes[i]]*weight;
3599 sumweight+=weight;
3600 }
3601 track->SetdEdx(sumamp/sumweight);
3602}
3603//------------------------------------------------------------------------
3604void AliITStrackerMI::MakeCoefficients(Int_t ntracks){
3605 //
3606 // Create some arrays
3607 //
3608 if (fCoefficients) delete []fCoefficients;
3609 fCoefficients = new Float_t[ntracks*48];
3610 for (Int_t i=0;i<ntracks*48;i++) fCoefficients[i]=-1.;
3611}
3612//------------------------------------------------------------------------
3613Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3614{
3615 //
3616 // Compute predicted chi2
3617 //
3618 Float_t erry,errz;
3619 Float_t theta = track->GetTgl();
3620 Float_t phi = track->GetSnp();
3621 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
3622 AliITSClusterParam::GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
3623 AliDebug(2,Form(" chi2: tr-cl %f %f tr X %f cl X %f",track->GetY()-cluster->GetY(),track->GetZ()-cluster->GetZ(),track->GetX(),cluster->GetX()));
3624 // Take into account the mis-alignment (bring track to cluster plane)
3625 Double_t xTrOrig=track->GetX();
3626 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
3627 AliDebug(2,Form(" chi2: tr-cl %f %f tr X %f cl X %f",track->GetY()-cluster->GetY(),track->GetZ()-cluster->GetZ(),track->GetX(),cluster->GetX()));
3628 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3629 // Bring the track back to detector plane in ideal geometry
3630 // [mis-alignment will be accounted for in UpdateMI()]
3631 if (!track->Propagate(xTrOrig)) return 1000.;
3632 Float_t ny,nz;
3633 AliITSClusterParam::GetNTeor(layer,cluster,theta,phi,ny,nz);
3634 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3635 if (delta>1){
3636 chi2+=0.5*TMath::Min(delta/2,2.);
3637 chi2+=2.*cluster->GetDeltaProbability();
3638 }
3639 //
3640 track->SetNy(layer,ny);
3641 track->SetNz(layer,nz);
3642 track->SetSigmaY(layer,erry);
3643 track->SetSigmaZ(layer, errz);
3644 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3645 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
3646 return chi2;
3647
3648}
3649//------------------------------------------------------------------------
3650Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3651{
3652 //
3653 // Update ITS track
3654 //
3655 Int_t layer = (index & 0xf0000000) >> 28;
3656 track->SetClIndex(layer, index);
3657 if (layer>1&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(layer)) {
3658 if (track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3659 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3660 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3661 }
3662 }
3663
3664 if (cl->GetQ()<=0) return 0; // ingore the "virtual" clusters
3665
3666
3667 // Take into account the mis-alignment (bring track to cluster plane)
3668 Double_t xTrOrig=track->GetX();
3669 Float_t clxyz[3]; cl->GetGlobalXYZ(clxyz);Double_t trxyz[3]; track->GetXYZ(trxyz);
3670 AliDebug(2,Form("gtr %f %f %f",trxyz[0],trxyz[1],trxyz[2]));
3671 AliDebug(2,Form("gcl %f %f %f",clxyz[0],clxyz[1],clxyz[2]));
3672 AliDebug(2,Form(" xtr %f xcl %f",track->GetX(),cl->GetX()));
3673
3674 if (!track->Propagate(xTrOrig+cl->GetX())) return 0;
3675
3676
3677 AliCluster c(*cl);
3678 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
3679 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
3680
3681
3682 Int_t updated = track->UpdateMI(&c,chi2,index);
3683
3684 // Bring the track back to detector plane in ideal geometry
3685 if (!track->Propagate(xTrOrig)) return 0;
3686
3687 if(!updated) AliDebug(2,"update failed");
3688 return updated;
3689}
3690
3691//------------------------------------------------------------------------
3692void AliITStrackerMI::GetDCASigma(const AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3693{
3694 //
3695 //DCA sigmas parameterization
3696 //to be paramterized using external parameters in future
3697 //
3698 //
3699 sigmarfi = 0.0040+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3700 sigmaz = 0.0110+4.37*TMath::Abs(track->GetC());
3701}
3702//------------------------------------------------------------------------
3703void AliITStrackerMI::SignDeltas(const TObjArray *clusterArray, Float_t vz)
3704{
3705 //
3706 // Clusters from delta electrons?
3707 //
3708 Int_t entries = clusterArray->GetEntriesFast();
3709 if (entries<4) return;
3710 AliITSRecPoint* cluster = (AliITSRecPoint*)clusterArray->At(0);
3711 Int_t layer = cluster->GetLayer();
3712 if (layer>1) return;
3713 Int_t index[10000];
3714 Int_t ncandidates=0;
3715 Float_t r = (layer>0)? 7:4;
3716 //
3717 for (Int_t i=0;i<entries;i++){
3718 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(i);
3719 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3720 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3721 index[ncandidates] = i; //candidate to belong to delta electron track
3722 ncandidates++;
3723 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3724 cl0->SetDeltaProbability(1);
3725 }
3726 }
3727 //
3728 //
3729 //
3730 for (Int_t i=0;i<ncandidates;i++){
3731 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(index[i]);
3732 if (cl0->GetDeltaProbability()>0.8) continue;
3733 //
3734 Int_t ncl = 0;
3735 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3736 sumy=sumz=sumy2=sumyz=sumw=0.0;
3737 for (Int_t j=0;j<ncandidates;j++){
3738 if (i==j) continue;
3739 AliITSRecPoint* cl1 = (AliITSRecPoint*)clusterArray->At(index[j]);
3740 //
3741 Float_t dz = cl0->GetZ()-cl1->GetZ();
3742 Float_t dy = cl0->GetY()-cl1->GetY();
3743 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3744 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3745 y[ncl] = cl1->GetY();
3746 z[ncl] = cl1->GetZ();
3747 sumy+= y[ncl]*weight;
3748 sumz+= z[ncl]*weight;
3749 sumy2+=y[ncl]*y[ncl]*weight;
3750 sumyz+=y[ncl]*z[ncl]*weight;
3751 sumw+=weight;
3752 ncl++;
3753 }
3754 }
3755 if (ncl<4) continue;
3756 Float_t det = sumw*sumy2 - sumy*sumy;
3757 Float_t delta=1000;
3758 if (TMath::Abs(det)>0.01){
3759 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3760 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3761 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3762 }
3763 else{
3764 Float_t z0 = sumyz/sumy;
3765 delta = TMath::Abs(cl0->GetZ()-z0);
3766 }
3767 if ( delta<0.05) {
3768 cl0->SetDeltaProbability(1-20.*delta);
3769 }
3770 }
3771}
3772//------------------------------------------------------------------------
3773void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3774{
3775 //
3776 // Update ESD track
3777 //
3778 track->UpdateESDtrack(flags);
3779 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3780 if (oldtrack) delete oldtrack;
3781 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3782 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
3783 printf("Problem\n");
3784 }
3785}
3786//------------------------------------------------------------------------
3787Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3788 //
3789 // Get nearest upper layer close to the point xr.
3790 // rough approximation
3791 //
3792 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3793 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3794 Int_t res =6;
3795 for (Int_t i=0;i<6;i++){
3796 if (radius<kRadiuses[i]){
3797 res =i;
3798 break;
3799 }
3800 }
3801 return res;
3802}
3803
3804//------------------------------------------------------------------------
3805void AliITStrackerMI::UpdateTPCV0(const AliESDEvent *event){
3806 //
3807 //try to update, or reject TPC V0s
3808 //
3809 Int_t nv0s = event->GetNumberOfV0s();
3810 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3811
3812 for (Int_t i=0;i<nv0s;i++){
3813 AliESDv0 * vertex = event->GetV0(i);
3814 Int_t ip = vertex->GetIndex(0);
3815 Int_t im = vertex->GetIndex(1);
3816 //
3817 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3818 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3819 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3820 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3821 //
3822 //
3823 if (trackp){
3824 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3825 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3826 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3827 }
3828 }
3829
3830 if (trackm){
3831 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3832 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3833 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3834 }
3835 }
3836 if (vertex->GetStatus()==-100) continue;
3837 //
3838 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3839 Int_t clayer = GetNearestLayer(xrp); //I.B.
3840 vertex->SetNBefore(clayer); //
3841 vertex->SetChi2Before(9*clayer); //
3842 vertex->SetNAfter(6-clayer); //
3843 vertex->SetChi2After(0); //
3844 //
3845 if (clayer >1 ){ // calculate chi2 before vertex
3846 Float_t chi2p = 0, chi2m=0;
3847 //
3848 if (trackp){
3849 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3850 if (trackp->GetClIndex(ilayer)>=0){
3851 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3852 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3853 }
3854 else{
3855 chi2p+=9;
3856 }
3857 }
3858 }else{
3859 chi2p = 9*clayer;
3860 }
3861 //
3862 if (trackm){
3863 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3864 if (trackm->GetClIndex(ilayer)>=0){
3865 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3866 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3867 }
3868 else{
3869 chi2m+=9;
3870 }
3871 }
3872 }else{
3873 chi2m = 9*clayer;
3874 }
3875 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3876 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3877 }
3878
3879 if (clayer < 5 ){ // calculate chi2 after vertex
3880 Float_t chi2p = 0, chi2m=0;
3881 //
3882 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
3883 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3884 if (trackp->GetClIndex(ilayer)>=0){
3885 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3886 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3887 }
3888 else{
3889 chi2p+=9;
3890 }
3891 }
3892 }else{
3893 chi2p = 0;
3894 }
3895 //
3896 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
3897 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3898 if (trackm->GetClIndex(ilayer)>=0){
3899 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3900 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3901 }
3902 else{
3903 chi2m+=9;
3904 }
3905 }
3906 }else{
3907 chi2m = 0;
3908 }
3909 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3910 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3911 }
3912 }
3913 //
3914}
3915//------------------------------------------------------------------------
3916void AliITStrackerMI::FindV02(AliESDEvent *event)
3917{
3918 //
3919 // V0 finder
3920 //
3921 // Cuts on DCA - R dependent
3922 // max distance DCA between 2 tracks cut
3923 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3924 //
3925 const Float_t kMaxDist0 = 0.1;
3926 const Float_t kMaxDist1 = 0.1;
3927 const Float_t kMaxDist = 1;
3928 const Float_t kMinPointAngle = 0.85;
3929 const Float_t kMinPointAngle2 = 0.99;
3930 const Float_t kMinR = 0.5;
3931 const Float_t kMaxR = 220;
3932 //const Float_t kCausality0Cut = 0.19;
3933 //const Float_t kLikelihood01Cut = 0.25;
3934 //const Float_t kPointAngleCut = 0.9996;
3935 const Float_t kCausality0Cut = 0.19;
3936 const Float_t kLikelihood01Cut = 0.45;
3937 const Float_t kLikelihood1Cut = 0.5;
3938 const Float_t kCombinedCut = 0.55;
3939
3940 //
3941 //
3942 TTreeSRedirector &cstream = *fDebugStreamer;
3943 Int_t ntracks = event->GetNumberOfTracks();
3944 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3945 fOriginal.Expand(ntracks);
3946 fTrackHypothesys.Expand(ntracks);
3947 fBestHypothesys.Expand(ntracks);
3948 //
3949 AliHelix * helixes = new AliHelix[ntracks+2];
3950 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3951 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3952 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3953 Bool_t * forbidden = new Bool_t [ntracks+2];
3954 Int_t *itsmap = new Int_t [ntracks+2];
3955 Float_t *dist = new Float_t[ntracks+2];
3956 Float_t *normdist0 = new Float_t[ntracks+2];
3957 Float_t *normdist1 = new Float_t[ntracks+2];
3958 Float_t *normdist = new Float_t[ntracks+2];
3959 Float_t *norm = new Float_t[ntracks+2];
3960 Float_t *maxr = new Float_t[ntracks+2];
3961 Float_t *minr = new Float_t[ntracks+2];
3962 Float_t *minPointAngle= new Float_t[ntracks+2];
3963 //
3964 AliV0 *pvertex = new AliV0;
3965 AliITStrackMI * dummy= new AliITStrackMI;
3966 dummy->SetLabel(0);
3967 AliITStrackMI trackat0; //temporary track for DCA calculation
3968 //
3969 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3970 //
3971 // make ITS - ESD map
3972 //
3973 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3974 itsmap[itrack] = -1;
3975 forbidden[itrack] = kFALSE;
3976 maxr[itrack] = kMaxR;
3977 minr[itrack] = kMinR;
3978 minPointAngle[itrack] = kMinPointAngle;
3979 }
3980 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3981 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
3982 Int_t esdindex = original->GetESDtrack()->GetID();
3983 itsmap[esdindex] = itrack;
3984 }
3985 //
3986 // create ITS tracks from ESD tracks if not done before
3987 //
3988 for (Int_t itrack=0;itrack<ntracks;itrack++){
3989 if (itsmap[itrack]>=0) continue;
3990 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
3991 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3992 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
3993 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
3994 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
3995 // tracks which can reach inner part of ITS
3996 // propagate track to outer its volume - with correction for material
3997 CorrectForTPCtoITSDeadZoneMaterial(tpctrack);
3998 }
3999 itsmap[itrack] = nitstracks;
4000 fOriginal.AddAt(tpctrack,nitstracks);
4001 nitstracks++;
4002 }
4003 //
4004 // fill temporary arrays
4005 //
4006 for (Int_t itrack=0;itrack<ntracks;itrack++){
4007 AliESDtrack * esdtrack = event->GetTrack(itrack);
4008 Int_t itsindex = itsmap[itrack];
4009 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
4010 if (!original) continue;
4011 AliITStrackMI *bestConst = 0;
4012 AliITStrackMI *bestLong = 0;
4013 AliITStrackMI *best = 0;
4014 //
4015 //
4016 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
4017 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
4018 // Get best track with vertex constrain
4019 for (Int_t ih=0;ih<hentries;ih++){
4020 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
4021 if (!trackh->GetConstrain()) continue;
4022 if (!bestConst) bestConst = trackh;
4023 if (trackh->GetNumberOfClusters()>5.0){
4024 bestConst = trackh; // full track - with minimal chi2
4025 break;
4026 }
4027 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
4028 bestConst = trackh;
4029 break;
4030 }
4031 // Get best long track without vertex constrain and best track without vertex constrain
4032 for (Int_t ih=0;ih<hentries;ih++){
4033 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
4034 if (trackh->GetConstrain()) continue;
4035 if (!best) best = trackh;
4036 if (!bestLong) bestLong = trackh;
4037 if (trackh->GetNumberOfClusters()>5.0){
4038 bestLong = trackh; // full track - with minimal chi2
4039 break;
4040 }
4041 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
4042 bestLong = trackh;
4043 }
4044 if (!best) {
4045 best = original;
4046 bestLong = original;
4047 }
4048 //I.B. trackat0 = *bestLong;
4049 new (&trackat0) AliITStrackMI(*bestLong);
4050 Double_t xx,yy,zz,alpha;
4051 if (!bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz)) continue;
4052 alpha = TMath::ATan2(yy,xx);
4053 trackat0.Propagate(alpha,0); //PH The check on the return value is temporarily disabled (bug 45751)
4054 // calculate normalized distances to the vertex
4055 //
4056 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
4057 if ( bestLong->GetNumberOfClusters()>3 ){
4058 dist[itsindex] = trackat0.GetY();
4059 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
4060 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
4061 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
4062 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
4063 if (!bestConst){
4064 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
4065 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
4066 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
4067 }else{
4068 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
4069 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
4070 }
4071 }
4072 else{
4073 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
4074 dist[itsindex] = bestConst->GetD(0);
4075 norm[itsindex] = bestConst->GetDnorm(0);
4076 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
4077 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
4078 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
4079 }else{
4080 dist[itsindex] = trackat0.GetY();
4081 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
4082 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
4083 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
4084 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
4085 if (TMath::Abs(trackat0.GetTgl())>1.05){
4086 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
4087 if (normdist[itsindex]>3) {
4088 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
4089 }
4090 }
4091 }
4092 }
4093 //
4094 //-----------------------------------------------------------
4095 //Forbid primary track candidates -
4096 //
4097 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
4098 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
4099 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
4100 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
4101 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
4102 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
4103 //-----------------------------------------------------------
4104 if (bestConst){
4105 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
4106 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
4107 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>=0 && bestConst->GetClIndex(1)>=0 ) forbidden[itsindex]=kTRUE;
4108 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>=0) forbidden[itsindex]=kTRUE;
4109 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
4110 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
4111 if (bestConst->GetNormChi2(0)<2.5) {
4112 minPointAngle[itsindex]= 0.9999;
4113 maxr[itsindex] = 10;
4114 }
4115 }
4116 //
4117 //forbid daughter kink candidates
4118 //
4119 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
4120 Bool_t isElectron = kTRUE;
4121 Bool_t isProton = kTRUE;
4122 Double_t pid[5];
4123 esdtrack->GetESDpid(pid);
4124 for (Int_t i=1;i<5;i++){
4125 if (pid[0]<pid[i]) isElectron= kFALSE;
4126 if (pid[4]<pid[i]) isProton= kFALSE;
4127 }
4128 if (isElectron){
4129 forbidden[itsindex]=kFALSE;
4130 normdist[itsindex]*=-1;
4131 }
4132 if (isProton){
4133 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
4134 normdist[itsindex]*=-1;
4135 }
4136
4137 //
4138 // Causality cuts in TPC volume
4139 //
4140 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
4141 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
4142 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
4143 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
4144 //
4145 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
4146 //
4147 //
4148 if (kFALSE){
4149 cstream<<"Track"<<
4150 "Tr0.="<<best<<
4151 "Tr1.="<<((bestConst)? bestConst:dummy)<<
4152 "Tr2.="<<bestLong<<
4153 "Tr3.="<<&trackat0<<
4154 "Esd.="<<esdtrack<<
4155 "Dist="<<dist[itsindex]<<
4156 "ND0="<<normdist0[itsindex]<<
4157 "ND1="<<normdist1[itsindex]<<
4158 "ND="<<normdist[itsindex]<<
4159 "Pz="<<primvertex[2]<<
4160 "Forbid="<<forbidden[itsindex]<<
4161 "\n";
4162 //
4163 }
4164 trackarray.AddAt(best,itsindex);
4165 trackarrayc.AddAt(bestConst,itsindex);
4166 trackarrayl.AddAt(bestLong,itsindex);
4167 new (&helixes[itsindex]) AliHelix(*best);
4168 }
4169 //
4170 //
4171 //
4172 // first iterration of V0 finder
4173 //
4174 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
4175 Int_t itrack0 = itsmap[iesd0];
4176 if (forbidden[itrack0]) continue;
4177 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
4178 if (!btrack0) continue;
4179 if (btrack0->GetSign()>0 && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;
4180 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
4181 //
4182 for (Int_t iesd1=iesd0+1;iesd1<ntracks;iesd1++){
4183 Int_t itrack1 = itsmap[iesd1];
4184 if (forbidden[itrack1]) continue;
4185
4186 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
4187 if (!btrack1) continue;
4188 if (btrack1->GetSign()<0 && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;
4189 Bool_t isGold = kFALSE;
4190 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
4191 isGold = kTRUE;
4192 }
4193 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
4194 AliHelix &h1 = helixes[itrack0];
4195 AliHelix &h2 = helixes[itrack1];
4196 //
4197 // find linear distance
4198 Double_t rmin =0;
4199 //
4200 //
4201 //
4202 Double_t phase[2][2],radius[2];
4203 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
4204 if (points==0) continue;
4205 Double_t delta[2]={1000000,1000000};
4206 rmin = radius[0];
4207 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
4208 if (points==2){
4209 if (radius[1]<rmin) rmin = radius[1];
4210 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
4211 }
4212 rmin = TMath::Sqrt(rmin);
4213 Double_t distance = 0;
4214 Double_t radiusC = 0;
4215 Int_t iphase = 0;
4216 if (points==1 || delta[0]<delta[1]){
4217 distance = TMath::Sqrt(delta[0]);
4218 radiusC = TMath::Sqrt(radius[0]);
4219 }else{
4220 distance = TMath::Sqrt(delta[1]);
4221 radiusC = TMath::Sqrt(radius[1]);
4222 iphase=1;
4223 }
4224 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
4225 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
4226 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
4227 if (distance>maxDist) continue;
4228 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
4229 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
4230 //
4231 //
4232 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
4233 //
4234 // if (distance>maxDist) continue;
4235 // if (pvertex->GetRr()<kMinR) continue;
4236 // if (pvertex->GetRr()>kMaxR) continue;
4237 AliITStrackMI * track0=btrack0;
4238 AliITStrackMI * track1=btrack1;
4239 // if (pvertex->GetRr()<3.5){
4240 if (radiusC<3.5){
4241 //use longest tracks inside the pipe
4242 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
4243 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
4244 }
4245 //
4246 //
4247 pvertex->SetParamN(*track0);
4248 pvertex->SetParamP(*track1);
4249 pvertex->Update(primvertex);
4250 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
4251
4252 if (pvertex->GetRr()<kMinR) continue;
4253 if (pvertex->GetRr()>kMaxR) continue;
4254 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
4255//Bo: if (pvertex->GetDist2()>maxDist) continue;
4256 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
4257//Bo: pvertex->SetLab(0,track0->GetLabel());
4258//Bo: pvertex->SetLab(1,track1->GetLabel());
4259 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4260 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4261 //
4262 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
4263 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
4264
4265 //
4266 //
4267 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
4268 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1) {
4269 fCurrentEsdTrack = itrack0;
4270 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
4271 }
4272 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
4273 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1) {
4274 fCurrentEsdTrack = itrack1;
4275 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
4276 }
4277 //
4278 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
4279 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
4280 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
4281 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
4282
4283 Float_t minchi2before0=16;
4284 Float_t minchi2before1=16;
4285 Float_t minchi2after0 =16;
4286 Float_t minchi2after1 =16;
4287 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
4288 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
4289
4290 if (array0b) for (Int_t i=0;i<5;i++){
4291 // best track after vertex
4292 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
4293 if (!btrack) continue;
4294 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
4295 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
4296 if (btrack->GetX()<pvertex->GetRr()-2.) {
4297 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
4298 Float_t sumchi2= 0;
4299 Float_t sumn = 0;
4300 if (maxLayer<3){ // take prim vertex as additional measurement
4301 if (normdist[itrack0]>0 && htrackc0){
4302 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
4303 }else{
4304 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
4305 }
4306 sumn += 3-maxLayer;
4307 }
4308 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4309 sumn+=1.;
4310 if (btrack->GetClIndex(ilayer)<0){
4311 sumchi2+=25;
4312 continue;
4313 }else{
4314 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4315 for (Int_t itrack=0;itrack<4;itrack++){
4316 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
4317 sumchi2+=18.; //shared cluster
4318 break;
4319 }
4320 }
4321 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4322 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4323 }
4324 }
4325 sumchi2/=sumn;
4326 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
4327 }
4328 continue; //safety space - Geo manager will give exact layer
4329 }
4330 track0b = btrack;
4331 minchi2after0 = btrack->GetNormChi2(i);
4332 break;
4333 }
4334 if (array1b) for (Int_t i=0;i<5;i++){
4335 // best track after vertex
4336 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4337 if (!btrack) continue;
4338 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
4339 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
4340 if (btrack->GetX()<pvertex->GetRr()-2){
4341 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
4342 Float_t sumchi2= 0;
4343 Float_t sumn = 0;
4344 if (maxLayer<3){ // take prim vertex as additional measurement
4345 if (normdist[itrack1]>0 && htrackc1){
4346 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
4347 }else{
4348 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
4349 }
4350 sumn += 3-maxLayer;
4351 }
4352 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4353 sumn+=1.;
4354 if (btrack->GetClIndex(ilayer)<0){
4355 sumchi2+=30;
4356 continue;
4357 }else{
4358 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4359 for (Int_t itrack=0;itrack<4;itrack++){
4360 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
4361 sumchi2+=18.; //shared cluster
4362 break;
4363 }
4364 }
4365 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4366 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4367 }
4368 }
4369 sumchi2/=sumn;
4370 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
4371 }
4372 continue; //safety space - Geo manager will give exact layer
4373 }
4374 track1b = btrack;
4375 minchi2after1 = btrack->GetNormChi2(i);
4376 break;
4377 }
4378 //
4379 // position resolution - used for DCA cut
4380 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4381 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4382 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
4383 sigmad =TMath::Sqrt(sigmad)+0.04;
4384 if (pvertex->GetRr()>50){
4385 Double_t cov0[15],cov1[15];
4386 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4387 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
4388 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4389 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4390 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4391 sigmad =TMath::Sqrt(sigmad)+0.05;
4392 }
4393 //
4394 AliV0 vertex2;
4395 vertex2.SetParamN(*track0b);
4396 vertex2.SetParamP(*track1b);
4397 vertex2.Update(primvertex);
4398 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4399 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4400 pvertex->SetParamN(*track0b);
4401 pvertex->SetParamP(*track1b);
4402 pvertex->Update(primvertex);
4403 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4404 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4405 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4406 }
4407 pvertex->SetDistSigma(sigmad);
4408 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
4409 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
4410 //
4411 // define likelihhod and causalities
4412 //
4413 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
4414 if (maxLayer<1){
4415 Float_t fnorm0 = normdist[itrack0];
4416 if (fnorm0<0) fnorm0*=-3;
4417 Float_t fnorm1 = normdist[itrack1];
4418 if (fnorm1<0) fnorm1*=-3;
4419 if ((pvertex->GetAnglep()[2]>0.1) || ( (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 ) || (pvertex->GetRr()<3)){
4420 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4421 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
4422 }
4423 pvertex->SetChi2Before(normdist[itrack0]);
4424 pvertex->SetChi2After(normdist[itrack1]);
4425 pvertex->SetNAfter(0);
4426 pvertex->SetNBefore(0);
4427 }else{
4428 pvertex->SetChi2Before(minchi2before0);
4429 pvertex->SetChi2After(minchi2before1);
4430 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4431 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4432 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4433 }
4434 pvertex->SetNAfter(maxLayer);
4435 pvertex->SetNBefore(maxLayer);
4436 }
4437 if (pvertex->GetRr()<90){
4438 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
4439 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
4440 }
4441 if (pvertex->GetRr()<20){
4442 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4443 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
4444 }
4445 //
4446 pvertex->SetCausality(pb0,pb1,pa0,pa1);
4447 //
4448 // Likelihood calculations - apply cuts
4449 //
4450 Bool_t v0OK = kTRUE;
4451 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
4452 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
4453 p12 = TMath::Sqrt(p12); // "mean" momenta
4454 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4455 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4456
4457 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
4458 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*
4459 TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));
4460 //
4461 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4462 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4463 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4464
4465 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4466 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4467 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4468 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
4469 //
4470 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4471 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4472 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4473 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
4474
4475 //
4476 //
4477 if (kFALSE){
4478 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4479 cstream<<"It0"<<
4480 "Tr0.="<<track0<< //best without constrain
4481 "Tr1.="<<track1<< //best without constrain
4482 "Tr0B.="<<track0b<< //best without constrain after vertex
4483 "Tr1B.="<<track1b<< //best without constrain after vertex
4484 "Tr0C.="<<htrackc0<< //best with constrain if exist
4485 "Tr1C.="<<htrackc1<< //best with constrain if exist
4486 "Tr0L.="<<track0l<< //longest best
4487 "Tr1L.="<<track1l<< //longest best
4488 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4489 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
4490 "V0.="<<pvertex<< //vertex properties
4491 "V0b.="<<&vertex2<< //vertex properties at "best" track
4492 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4493 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4494 "Gold="<<gold<< //
4495 // "RejectBase="<<rejectBase<< //rejection in First itteration
4496 "OK="<<v0OK<<
4497 "rmin="<<rmin<<
4498 "sigmad="<<sigmad<<
4499 "\n";
4500 }
4501 //if (rejectBase) continue;
4502 //
4503 pvertex->SetStatus(0);
4504 // if (rejectBase) {
4505 // pvertex->SetStatus(-100);
4506 //}
4507 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4508 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4509 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4510 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
4511 if (v0OK){
4512 // AliV0vertex vertexjuri(*track0,*track1);
4513 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4514 // event->AddV0(&vertexjuri);
4515 pvertex->SetStatus(100);
4516 }
4517 pvertex->SetOnFlyStatus(kTRUE);
4518 pvertex->ChangeMassHypothesis(kK0Short);
4519 event->AddV0(pvertex);
4520 }
4521 }
4522 }
4523 //
4524 //
4525 // delete temporary arrays
4526 //
4527 delete[] forbidden;
4528 delete[] minPointAngle;
4529 delete[] maxr;
4530 delete[] minr;
4531 delete[] norm;
4532 delete[] normdist;
4533 delete[] normdist1;
4534 delete[] normdist0;
4535 delete[] dist;
4536 delete[] itsmap;
4537 delete[] helixes;
4538 delete pvertex;
4539}
4540//------------------------------------------------------------------------
4541void AliITStrackerMI::RefitV02(const AliESDEvent *event)
4542{
4543 //
4544 //try to refit V0s in the third path of the reconstruction
4545 //
4546 TTreeSRedirector &cstream = *fDebugStreamer;
4547 //
4548 Int_t nv0s = event->GetNumberOfV0s();
4549 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
4550 AliV0 v0temp;
4551 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
4552 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
4553 if (!v0mi) continue;
4554 Int_t itrack0 = v0mi->GetIndex(0);
4555 Int_t itrack1 = v0mi->GetIndex(1);
4556 AliESDtrack *esd0 = event->GetTrack(itrack0);
4557 AliESDtrack *esd1 = event->GetTrack(itrack1);
4558 if (!esd0||!esd1) continue;
4559 AliITStrackMI tpc0(*esd0);
4560 AliITStrackMI tpc1(*esd1);
4561 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4562 Double_t alpha =TMath::ATan2(y,x); //I.B.
4563 if (v0mi->GetRr()>85){
4564 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4565 v0temp.SetParamN(tpc0);
4566 v0temp.SetParamP(tpc1);
4567 v0temp.Update(primvertex);
4568 if (kFALSE) cstream<<"Refit"<<
4569 "V0.="<<v0mi<<
4570 "V0refit.="<<&v0temp<<
4571 "Tr0.="<<&tpc0<<
4572 "Tr1.="<<&tpc1<<
4573 "\n";
4574 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4575 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4576 v0mi->SetParamN(tpc0);
4577 v0mi->SetParamP(tpc1);
4578 v0mi->Update(primvertex);
4579 }
4580 }
4581 continue;
4582 }
4583 if (v0mi->GetRr()>35){
4584 CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
4585 CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
4586 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4587 v0temp.SetParamN(tpc0);
4588 v0temp.SetParamP(tpc1);
4589 v0temp.Update(primvertex);
4590 if (kFALSE) cstream<<"Refit"<<
4591 "V0.="<<v0mi<<
4592 "V0refit.="<<&v0temp<<
4593 "Tr0.="<<&tpc0<<
4594 "Tr1.="<<&tpc1<<
4595 "\n";
4596 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4597 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4598 v0mi->SetParamN(tpc0);
4599 v0mi->SetParamP(tpc1);
4600 v0mi->Update(primvertex);
4601 }
4602 }
4603 continue;
4604 }
4605 CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
4606 CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
4607 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4608 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
4609 v0temp.SetParamN(tpc0);
4610 v0temp.SetParamP(tpc1);
4611 v0temp.Update(primvertex);
4612 if (kFALSE) cstream<<"Refit"<<
4613 "V0.="<<v0mi<<
4614 "V0refit.="<<&v0temp<<
4615 "Tr0.="<<&tpc0<<
4616 "Tr1.="<<&tpc1<<
4617 "\n";
4618 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4619 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4620 v0mi->SetParamN(tpc0);
4621 v0mi->SetParamP(tpc1);
4622 v0mi->Update(primvertex);
4623 }
4624 }
4625 }
4626}
4627
4628//------------------------------------------------------------------------
4629void AliITStrackerMI::BuildMaterialLUT(TString material) {
4630 //--------------------------------------------------------------------
4631 // Fill a look-up table with mean material
4632 //--------------------------------------------------------------------
4633
4634 Int_t n=1000;
4635 Double_t mparam[7];
4636 Double_t point1[3],point2[3];
4637 Double_t phi,cosphi,sinphi,z;
4638 // 0-5 layers, 6 pipe, 7-8 shields
4639 Double_t rmin[9]={ 3.5, 5.5,13.0,22.0,35.0,41.0, 2.0, 8.0,25.0};
4640 Double_t rmax[9]={ 5.5, 8.0,17.0,26.0,41.0,47.0, 3.0,10.5,30.0};
4641
4642 Int_t ifirst=0,ilast=0;
4643 if(material.Contains("Pipe")) {
4644 ifirst=6; ilast=6;
4645 } else if(material.Contains("Shields")) {
4646 ifirst=7; ilast=8;
4647 } else if(material.Contains("Layers")) {
4648 ifirst=0; ilast=5;
4649 } else {
4650 Error("BuildMaterialLUT","Wrong layer name\n");
4651 }
4652
4653 for(Int_t imat=ifirst; imat<=ilast; imat++) {
4654 Double_t param[5]={0.,0.,0.,0.,0.};
4655 for (Int_t i=0; i<n; i++) {
4656 phi = 2.*TMath::Pi()*gRandom->Rndm();
4657 cosphi = TMath::Cos(phi); sinphi = TMath::Sin(phi);
4658 z = 14.*(-1.+2.*gRandom->Rndm()); // SPD barrel
4659 point1[0] = rmin[imat]*cosphi;
4660 point1[1] = rmin[imat]*sinphi;
4661 point1[2] = z;
4662 point2[0] = rmax[imat]*cosphi;
4663 point2[1] = rmax[imat]*sinphi;
4664 point2[2] = z;
4665 AliTracker::MeanMaterialBudget(point1,point2,mparam);
4666 for(Int_t j=0;j<5;j++) param[j]+=mparam[j];
4667 }
4668 for(Int_t j=0;j<5;j++) param[j]/=(Float_t)n;
4669 if(imat<=5) {
4670 fxOverX0Layer[imat] = param[1];
4671 fxTimesRhoLayer[imat] = param[0]*param[4];
4672 } else if(imat==6) {
4673 fxOverX0Pipe = param[1];
4674 fxTimesRhoPipe = param[0]*param[4];
4675 } else if(imat==7) {
4676 fxOverX0Shield[0] = param[1];
4677 fxTimesRhoShield[0] = param[0]*param[4];
4678 } else if(imat==8) {
4679 fxOverX0Shield[1] = param[1];
4680 fxTimesRhoShield[1] = param[0]*param[4];
4681 }
4682 }
4683 /*
4684 printf("%s\n",material.Data());
4685 printf("%f %f\n",fxOverX0Pipe,fxTimesRhoPipe);
4686 printf("%f %f\n",fxOverX0Shield[0],fxTimesRhoShield[0]);
4687 printf("%f %f\n",fxOverX0Shield[1],fxTimesRhoShield[1]);
4688 printf("%f %f\n",fxOverX0Layer[0],fxTimesRhoLayer[0]);
4689 printf("%f %f\n",fxOverX0Layer[1],fxTimesRhoLayer[1]);
4690 printf("%f %f\n",fxOverX0Layer[2],fxTimesRhoLayer[2]);
4691 printf("%f %f\n",fxOverX0Layer[3],fxTimesRhoLayer[3]);
4692 printf("%f %f\n",fxOverX0Layer[4],fxTimesRhoLayer[4]);
4693 printf("%f %f\n",fxOverX0Layer[5],fxTimesRhoLayer[5]);
4694 */
4695 return;
4696}
4697//------------------------------------------------------------------------
4698Int_t AliITStrackerMI::CorrectForPipeMaterial(AliITStrackMI *t,
4699 TString direction) {
4700 //-------------------------------------------------------------------
4701 // Propagate beyond beam pipe and correct for material
4702 // (material budget in different ways according to fUseTGeo value)
4703 // Add time if going outward (PropagateTo or PropagateToTGeo)
4704 //-------------------------------------------------------------------
4705
4706 // Define budget mode:
4707 // 0: material from AliITSRecoParam (hard coded)
4708 // 1: material from TGeo in one step (on the fly)
4709 // 2: material from lut
4710 // 3: material from TGeo in one step (same for all hypotheses)
4711 Int_t mode;
4712 switch(fUseTGeo) {
4713 case 0:
4714 mode=0;
4715 break;
4716 case 1:
4717 mode=1;
4718 break;
4719 case 2:
4720 mode=2;
4721 break;
4722 case 3:
4723 if(fTrackingPhase.Contains("Clusters2Tracks"))
4724 { mode=3; } else { mode=1; }
4725 break;
4726 case 4:
4727 if(fTrackingPhase.Contains("Clusters2Tracks"))
4728 { mode=3; } else { mode=2; }
4729 break;
4730 default:
4731 mode=0;
4732 break;
4733 }
4734 if(fTrackingPhase.Contains("Default")) mode=0;
4735
4736 Int_t index=fCurrentEsdTrack;
4737
4738 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4739 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
4740 Double_t xToGo;
4741 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4742
4743 Double_t xOverX0,x0,lengthTimesMeanDensity;
4744
4745 switch(mode) {
4746 case 0:
4747 xOverX0 = AliITSRecoParam::GetdPipe();
4748 x0 = AliITSRecoParam::GetX0Be();
4749 lengthTimesMeanDensity = xOverX0*x0;
4750 lengthTimesMeanDensity *= dir;
4751 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4752 break;
4753 case 1:
4754 if (!t->PropagateToTGeo(xToGo,1)) return 0;
4755 break;
4756 case 2:
4757 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
4758 xOverX0 = fxOverX0Pipe;
4759 lengthTimesMeanDensity = fxTimesRhoPipe;
4760 lengthTimesMeanDensity *= dir;
4761 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4762 break;
4763 case 3:
4764 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
4765 if(fxOverX0PipeTrks[index]<0) {
4766 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4767 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4768 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4769 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
4770 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4771 return 1;
4772 }
4773 xOverX0 = fxOverX0PipeTrks[index];
4774 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
4775 lengthTimesMeanDensity *= dir;
4776 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4777 break;
4778 }
4779
4780 return 1;
4781}
4782//------------------------------------------------------------------------
4783Int_t AliITStrackerMI::CorrectForShieldMaterial(AliITStrackMI *t,
4784 TString shield,
4785 TString direction) {
4786 //-------------------------------------------------------------------
4787 // Propagate beyond SPD or SDD shield and correct for material
4788 // (material budget in different ways according to fUseTGeo value)
4789 // Add time if going outward (PropagateTo or PropagateToTGeo)
4790 //-------------------------------------------------------------------
4791
4792 // Define budget mode:
4793 // 0: material from AliITSRecoParam (hard coded)
4794 // 1: material from TGeo in steps of X cm (on the fly)
4795 // X = AliITSRecoParam::GetStepSizeTGeo()
4796 // 2: material from lut
4797 // 3: material from TGeo in one step (same for all hypotheses)
4798 Int_t mode;
4799 switch(fUseTGeo) {
4800 case 0:
4801 mode=0;
4802 break;
4803 case 1:
4804 mode=1;
4805 break;
4806 case 2:
4807 mode=2;
4808 break;
4809 case 3:
4810 if(fTrackingPhase.Contains("Clusters2Tracks"))
4811 { mode=3; } else { mode=1; }
4812 break;
4813 case 4:
4814 if(fTrackingPhase.Contains("Clusters2Tracks"))
4815 { mode=3; } else { mode=2; }
4816 break;
4817 default:
4818 mode=0;
4819 break;
4820 }
4821 if(fTrackingPhase.Contains("Default")) mode=0;
4822
4823 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4824 Double_t rToGo;
4825 Int_t shieldindex=0;
4826 if (shield.Contains("SDD")) { // SDDouter
4827 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(1) : AliITSRecoParam::GetrOutsideShield(1));
4828 shieldindex=1;
4829 } else if (shield.Contains("SPD")) { // SPDouter
4830 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(0) : AliITSRecoParam::GetrOutsideShield(0));
4831 shieldindex=0;
4832 } else {
4833 Error("CorrectForShieldMaterial"," Wrong shield name\n");
4834 return 0;
4835 }
4836 Double_t xToGo;
4837 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4838
4839 Int_t index=2*fCurrentEsdTrack+shieldindex;
4840
4841 Double_t xOverX0,x0,lengthTimesMeanDensity;
4842 Int_t nsteps=1;
4843
4844 switch(mode) {
4845 case 0:
4846 xOverX0 = AliITSRecoParam::Getdshield(shieldindex);
4847 x0 = AliITSRecoParam::GetX0shield(shieldindex);
4848 lengthTimesMeanDensity = xOverX0*x0;
4849 lengthTimesMeanDensity *= dir;
4850 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4851 break;
4852 case 1:
4853 nsteps= (Int_t)(TMath::Abs(t->GetX()-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4854 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4855 break;
4856 case 2:
4857 if(fxOverX0Shield[shieldindex]<0) BuildMaterialLUT("Shields");
4858 xOverX0 = fxOverX0Shield[shieldindex];
4859 lengthTimesMeanDensity = fxTimesRhoShield[shieldindex];
4860 lengthTimesMeanDensity *= dir;
4861 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4862 break;
4863 case 3:
4864 if(!fxOverX0ShieldTrks || index<0 || index>=2*fNtracks) Error("CorrectForShieldMaterial","Incorrect usage of UseTGeo option!\n");
4865 if(fxOverX0ShieldTrks[index]<0) {
4866 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4867 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4868 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4869 fxOverX0ShieldTrks[index] = TMath::Abs(xOverX0)/angle;
4870 fxTimesRhoShieldTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4871 return 1;
4872 }
4873 xOverX0 = fxOverX0ShieldTrks[index];
4874 lengthTimesMeanDensity = fxTimesRhoShieldTrks[index];
4875 lengthTimesMeanDensity *= dir;
4876 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4877 break;
4878 }
4879
4880 return 1;
4881}
4882//------------------------------------------------------------------------
4883Int_t AliITStrackerMI::CorrectForLayerMaterial(AliITStrackMI *t,
4884 Int_t layerindex,
4885 Double_t oldGlobXYZ[3],
4886 TString direction) {
4887 //-------------------------------------------------------------------
4888 // Propagate beyond layer and correct for material
4889 // (material budget in different ways according to fUseTGeo value)
4890 // Add time if going outward (PropagateTo or PropagateToTGeo)
4891 //-------------------------------------------------------------------
4892
4893 // Define budget mode:
4894 // 0: material from AliITSRecoParam (hard coded)
4895 // 1: material from TGeo in stepsof X cm (on the fly)
4896 // X = AliITSRecoParam::GetStepSizeTGeo()
4897 // 2: material from lut
4898 // 3: material from TGeo in one step (same for all hypotheses)
4899 Int_t mode;
4900 switch(fUseTGeo) {
4901 case 0:
4902 mode=0;
4903 break;
4904 case 1:
4905 mode=1;
4906 break;
4907 case 2:
4908 mode=2;
4909 break;
4910 case 3:
4911 if(fTrackingPhase.Contains("Clusters2Tracks"))
4912 { mode=3; } else { mode=1; }
4913 break;
4914 case 4:
4915 if(fTrackingPhase.Contains("Clusters2Tracks"))
4916 { mode=3; } else { mode=2; }
4917 break;
4918 default:
4919 mode=0;
4920 break;
4921 }
4922 if(fTrackingPhase.Contains("Default")) mode=0;
4923
4924 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4925
4926 Double_t r=fgLayers[layerindex].GetR();
4927 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
4928
4929 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
4930 Double_t xToGo;
4931 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4932
4933 Int_t index=6*fCurrentEsdTrack+layerindex;
4934
4935
4936 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
4937 Int_t nsteps=1;
4938
4939 // back before material (no correction)
4940 Double_t rOld,xOld;
4941 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
4942 if (!t->GetLocalXat(rOld,xOld)) return 0;
4943 if (!t->Propagate(xOld)) return 0;
4944
4945 switch(mode) {
4946 case 0:
4947 xOverX0 = fgLayers[layerindex].GetThickness(t->GetY(),t->GetZ(),x0);
4948 lengthTimesMeanDensity = xOverX0*x0;
4949 lengthTimesMeanDensity *= dir;
4950 // Bring the track beyond the material
4951 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4952 break;
4953 case 1:
4954 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4955 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4956 break;
4957 case 2:
4958 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
4959 xOverX0 = fxOverX0Layer[layerindex];
4960 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
4961 lengthTimesMeanDensity *= dir;
4962 // Bring the track beyond the material
4963 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4964 break;
4965 case 3:
4966 if(!fxOverX0LayerTrks || index<0 || index>=6*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
4967 if(fxOverX0LayerTrks[index]<0) {
4968 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4969 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
4970 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4971 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4972 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
4973 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4974 return 1;
4975 }
4976 xOverX0 = fxOverX0LayerTrks[index];
4977 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
4978 lengthTimesMeanDensity *= dir;
4979 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4980 break;
4981 }
4982
4983
4984 return 1;
4985}
4986//------------------------------------------------------------------------
4987void AliITStrackerMI::MakeTrksMaterialLUT(Int_t ntracks) {
4988 //-----------------------------------------------------------------
4989 // Initialize LUT for storing material for each prolonged track
4990 //-----------------------------------------------------------------
4991 fxOverX0PipeTrks = new Float_t[ntracks];
4992 fxTimesRhoPipeTrks = new Float_t[ntracks];
4993 fxOverX0ShieldTrks = new Float_t[ntracks*2];
4994 fxTimesRhoShieldTrks = new Float_t[ntracks*2];
4995 fxOverX0LayerTrks = new Float_t[ntracks*6];
4996 fxTimesRhoLayerTrks = new Float_t[ntracks*6];
4997
4998 for(Int_t i=0; i<ntracks; i++) {
4999 fxOverX0PipeTrks[i] = -1.;
5000 fxTimesRhoPipeTrks[i] = -1.;
5001 }
5002 for(Int_t j=0; j<ntracks*2; j++) {
5003 fxOverX0ShieldTrks[j] = -1.;
5004 fxTimesRhoShieldTrks[j] = -1.;
5005 }
5006 for(Int_t k=0; k<ntracks*6; k++) {
5007 fxOverX0LayerTrks[k] = -1.;
5008 fxTimesRhoLayerTrks[k] = -1.;
5009 }
5010
5011 fNtracks = ntracks;
5012
5013 return;
5014}
5015//------------------------------------------------------------------------
5016void AliITStrackerMI::DeleteTrksMaterialLUT() {
5017 //-----------------------------------------------------------------
5018 // Delete LUT for storing material for each prolonged track
5019 //-----------------------------------------------------------------
5020 if(fxOverX0PipeTrks) {
5021 delete [] fxOverX0PipeTrks; fxOverX0PipeTrks = 0;
5022 }
5023 if(fxOverX0ShieldTrks) {
5024 delete [] fxOverX0ShieldTrks; fxOverX0ShieldTrks = 0;
5025 }
5026
5027 if(fxOverX0LayerTrks) {
5028 delete [] fxOverX0LayerTrks; fxOverX0LayerTrks = 0;
5029 }
5030 if(fxTimesRhoPipeTrks) {
5031 delete [] fxTimesRhoPipeTrks; fxTimesRhoPipeTrks = 0;
5032 }
5033 if(fxTimesRhoShieldTrks) {
5034 delete [] fxTimesRhoShieldTrks; fxTimesRhoShieldTrks = 0;
5035 }
5036 if(fxTimesRhoLayerTrks) {
5037 delete [] fxTimesRhoLayerTrks; fxTimesRhoLayerTrks = 0;
5038 }
5039 return;
5040}
5041//------------------------------------------------------------------------
5042Int_t AliITStrackerMI::CheckSkipLayer(const AliITStrackMI *track,
5043 Int_t ilayer,Int_t idet) const {
5044 //-----------------------------------------------------------------
5045 // This method is used to decide whether to allow a prolongation
5046 // without clusters, because we want to skip the layer.
5047 // In this case the return value is > 0:
5048 // return 1: the user requested to skip a layer
5049 // return 2: track outside z acceptance of SSD/SDD and will cross both SPD
5050 //-----------------------------------------------------------------
5051
5052 if (AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilayer)) return 1;
5053
5054 if (idet<0 && ilayer>1 && AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance()) {
5055 // check if track will cross SPD outer layer
5056 Double_t phiAtSPD2,zAtSPD2;
5057 if (track->GetPhiZat(fgLayers[1].GetR(),phiAtSPD2,zAtSPD2)) {
5058 if (TMath::Abs(zAtSPD2)<2.*AliITSRecoParam::GetSPDdetzlength()) return 2;
5059 }
5060 }
5061
5062 return 0;
5063}
5064//------------------------------------------------------------------------
5065Int_t AliITStrackerMI::CheckDeadZone(AliITStrackMI *track,
5066 Int_t ilayer,Int_t idet,
5067 Double_t dz,Double_t dy,
5068 Bool_t noClusters) const {
5069 //-----------------------------------------------------------------
5070 // This method is used to decide whether to allow a prolongation
5071 // without clusters, because there is a dead zone in the road.
5072 // In this case the return value is > 0:
5073 // return 1: dead zone at z=0,+-7cm in SPD
5074 // return 2: all road is "bad" (dead or noisy) from the OCDB
5075 // return 3: something "bad" (dead or noisy) from the OCDB
5076 //-----------------------------------------------------------------
5077
5078 // check dead zones at z=0,+-7cm in the SPD
5079 if (ilayer<2 && !AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
5080 Double_t zmindead[3]={fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
5081 fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
5082 fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength()};
5083 Double_t zmaxdead[3]={fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
5084 fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
5085 fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength()};
5086 for (Int_t i=0; i<3; i++)
5087 if (track->GetZ()-dz<zmaxdead[i] && track->GetZ()+dz>zmindead[i]) {
5088 AliDebug(2,Form("crack SPD %d",ilayer));
5089 return 1;
5090 }
5091 }
5092
5093 // check bad zones from OCDB
5094 if (!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return 0;
5095
5096 if (idet<0) return 0;
5097
5098 AliITSdetector &det=fgLayers[ilayer].GetDetector(idet);
5099
5100 Int_t detType=-1;
5101 Float_t detSizeFactorX=0.0001,detSizeFactorZ=0.0001;
5102 if (ilayer==0 || ilayer==1) { // ---------- SPD
5103 detType = 0;
5104 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
5105 detType = 1;
5106 detSizeFactorX *= 2.;
5107 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
5108 detType = 2;
5109 }
5110 AliITSsegmentation *segm = (AliITSsegmentation*)fkDetTypeRec->GetSegmentationModel(detType);
5111 if (detType==2) segm->SetLayer(ilayer+1);
5112 Float_t detSizeX = detSizeFactorX*segm->Dx();
5113 Float_t detSizeZ = detSizeFactorZ*segm->Dz();
5114
5115 // check if the road overlaps with bad chips
5116 Float_t xloc,zloc;
5117 LocalModuleCoord(ilayer,idet,track,xloc,zloc);
5118 Float_t zlocmin = zloc-dz;
5119 Float_t zlocmax = zloc+dz;
5120 Float_t xlocmin = xloc-dy;
5121 Float_t xlocmax = xloc+dy;
5122 Int_t chipsInRoad[100];
5123
5124 // check if road goes out of detector
5125 Bool_t touchNeighbourDet=kFALSE;
5126 if (TMath::Abs(xlocmin)>0.5*detSizeX) {xlocmin=-0.5*detSizeX; touchNeighbourDet=kTRUE;}
5127 if (TMath::Abs(xlocmax)>0.5*detSizeX) {xlocmax=+0.5*detSizeX; touchNeighbourDet=kTRUE;}
5128 if (TMath::Abs(zlocmin)>0.5*detSizeZ) {zlocmin=-0.5*detSizeZ; touchNeighbourDet=kTRUE;}
5129 if (TMath::Abs(zlocmax)>0.5*detSizeZ) {zlocmax=+0.5*detSizeZ; touchNeighbourDet=kTRUE;}
5130 AliDebug(2,Form("layer %d det %d zmim zmax %f %f xmin xmax %f %f %f %f",ilayer,idet,zlocmin,zlocmax,xlocmin,xlocmax,detSizeZ,detSizeX));
5131
5132 // check if this detector is bad
5133 if (det.IsBad()) {
5134 AliDebug(2,Form("lay %d bad detector %d",ilayer,idet));
5135 if(!touchNeighbourDet) {
5136 return 2; // all detectors in road are bad
5137 } else {
5138 return 3; // at least one is bad
5139 }
5140 }
5141
5142 Int_t nChipsInRoad = segm->GetChipsInLocalWindow(chipsInRoad,zlocmin,zlocmax,xlocmin,xlocmax);
5143 AliDebug(2,Form("lay %d nChipsInRoad %d",ilayer,nChipsInRoad));
5144 if (!nChipsInRoad) return 0;
5145
5146 Bool_t anyBad=kFALSE,anyGood=kFALSE;
5147 for (Int_t iCh=0; iCh<nChipsInRoad; iCh++) {
5148 if (chipsInRoad[iCh]<0 || chipsInRoad[iCh]>det.GetNChips()-1) continue;
5149 AliDebug(2,Form(" chip %d bad %d",chipsInRoad[iCh],(Int_t)det.IsChipBad(chipsInRoad[iCh])));
5150 if (det.IsChipBad(chipsInRoad[iCh])) {
5151 anyBad=kTRUE;
5152 } else {
5153 anyGood=kTRUE;
5154 }
5155 }
5156
5157 if (!anyGood) {
5158 if(!touchNeighbourDet) {
5159 AliDebug(2,"all bad in road");
5160 return 2; // all chips in road are bad
5161 } else {
5162 return 3; // at least a bad chip in road
5163 }
5164 }
5165
5166 if (anyBad) {
5167 AliDebug(2,"at least a bad in road");
5168 return 3; // at least a bad chip in road
5169 }
5170
5171
5172 if (!AliITSReconstructor::GetRecoParam()->GetUseSingleBadChannelsFromOCDB()
5173 || ilayer==4 || ilayer==5 // SSD
5174 || !noClusters) return 0;
5175
5176 // There are no clusters in road: check if there is at least
5177 // a bad SPD pixel or SDD anode
5178
5179 Int_t idetInITS=idet;
5180 for(Int_t l=0;l<ilayer;l++) idetInITS+=AliITSgeomTGeo::GetNLadders(l+1)*AliITSgeomTGeo::GetNDetectors(l+1);
5181
5182 if (fITSChannelStatus->AnyBadInRoad(idetInITS,zlocmin,zlocmax,xlocmin,xlocmax)) {
5183 AliDebug(2,Form("Bad channel in det %d of layer %d\n",idet,ilayer));
5184 return 3;
5185 }
5186 //if (fITSChannelStatus->FractionOfBadInRoad(idet,zlocmin,zlocmax,xlocmin,xlocmax) > AliITSReconstructor::GetRecoParam()->GetMinFractionOfBadInRoad()) return 3;
5187
5188 return 0;
5189}
5190//------------------------------------------------------------------------
5191Bool_t AliITStrackerMI::LocalModuleCoord(Int_t ilayer,Int_t idet,
5192 const AliITStrackMI *track,
5193 Float_t &xloc,Float_t &zloc) const {
5194 //-----------------------------------------------------------------
5195 // Gives position of track in local module ref. frame
5196 //-----------------------------------------------------------------
5197
5198 xloc=0.;
5199 zloc=0.;
5200
5201 if(idet<0) return kFALSE;
5202
5203 Int_t ndet=AliITSgeomTGeo::GetNDetectors(ilayer+1); // layers from 1 to 6
5204
5205 Int_t lad = Int_t(idet/ndet) + 1;
5206
5207 Int_t det = idet - (lad-1)*ndet + 1;
5208
5209 Double_t xyzGlob[3],xyzLoc[3];
5210
5211 AliITSdetector &detector = fgLayers[ilayer].GetDetector(idet);
5212 // take into account the misalignment: xyz at real detector plane
5213 if(!track->GetXYZAt(detector.GetRmisal(),GetBz(),xyzGlob)) return kFALSE;
5214
5215 if(!AliITSgeomTGeo::GlobalToLocal(ilayer+1,lad,det,xyzGlob,xyzLoc)) return kFALSE;
5216
5217 xloc = (Float_t)xyzLoc[0];
5218 zloc = (Float_t)xyzLoc[2];
5219
5220 return kTRUE;
5221}
5222//------------------------------------------------------------------------
5223Bool_t AliITStrackerMI::IsOKForPlaneEff(const AliITStrackMI* track, const Int_t *clusters, Int_t ilayer) const {
5224//
5225// Method to be optimized further:
5226// Aim: decide whether a track can be used for PlaneEff evaluation
5227// the decision is taken based on the track quality at the layer under study
5228// no information on the clusters on this layer has to be used
5229// The criterium is to reject tracks at boundaries between basic block (e.g. SPD chip)
5230// the cut is done on number of sigmas from the boundaries
5231//
5232// Input: Actual track, layer [0,5] under study
5233// Output: none
5234// Return: kTRUE if this is a good track
5235//
5236// it will apply a pre-selection to obtain good quality tracks.
5237// Here also you will have the possibility to put a control on the
5238// impact point of the track on the basic block, in order to exclude border regions
5239// this will be done by calling a proper method of the AliITSPlaneEff class.
5240//
5241// input: AliITStrackMI* track, ilayer= layer number [0,5]
5242// return: Bool_t -> kTRUE if usable track, kFALSE if not usable.
5243//
5244 Int_t index[AliITSgeomTGeo::kNLayers];
5245 Int_t k;
5246 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
5247 //
5248 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
5249 index[k]=clusters[k];
5250 }
5251
5252 if(!fPlaneEff)
5253 {AliWarning("IsOKForPlaneEff: null pointer to AliITSPlaneEff"); return kFALSE;}
5254 AliITSlayer &layer=fgLayers[ilayer];
5255 Double_t r=layer.GetR();
5256 AliITStrackMI tmp(*track);
5257
5258// require a minimal number of cluster in other layers and eventually clusters in closest layers
5259 Int_t ncl=0;
5260 for(Int_t lay=AliITSgeomTGeo::kNLayers-1;lay>ilayer;lay--) {
5261 AliDebug(2,Form("trak=%d lay=%d ; index=%d ESD label= %d",tmp.GetLabel(),lay,
5262 tmp.GetClIndex(lay),((AliESDtrack*)tmp.GetESDtrack())->GetLabel())) ;
5263 if (tmp.GetClIndex(lay)>=0) ncl++;
5264 }
5265 Bool_t nextout = kFALSE;
5266 if(ilayer==AliITSgeomTGeo::kNLayers-1) nextout=kTRUE; // you are already on the outermost layer
5267 else nextout = ((tmp.GetClIndex(ilayer+1)>=0)? kTRUE : kFALSE );
5268 Bool_t nextin = kFALSE;
5269 if(ilayer==0) nextin=kTRUE; // you are already on the innermost layer
5270 else nextin = ((index[ilayer-1]>=0)? kTRUE : kFALSE );
5271 if(ncl<AliITSgeomTGeo::kNLayers-(ilayer+1)-AliITSReconstructor::GetRecoParam()->GetMaxMissingClustersPlaneEff())
5272 return kFALSE;
5273 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInOuterLayerPlaneEff() && !nextout) return kFALSE;
5274 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInInnerLayerPlaneEff() && !nextin) return kFALSE;
5275 if(tmp.Pt() < AliITSReconstructor::GetRecoParam()->GetMinPtPlaneEff()) return kFALSE;
5276 // if(AliITSReconstructor::GetRecoParam()->GetOnlyConstraintPlaneEff() && !tmp.GetConstrain()) return kFALSE;
5277
5278// detector number
5279 Double_t phi,z;
5280 if (!tmp.GetPhiZat(r,phi,z)) return kFALSE;
5281 Int_t idet=layer.FindDetectorIndex(phi,z);
5282 if(idet<0) { AliInfo(Form("cannot find detector"));
5283 return kFALSE;}
5284
5285 // here check if it has good Chi Square.
5286
5287 //propagate to the intersection with the detector plane
5288 const AliITSdetector &det=layer.GetDetector(idet);
5289 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return kFALSE;
5290
5291 Float_t locx; //
5292 Float_t locz; //
5293 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return kFALSE;
5294 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
5295 if(key>fPlaneEff->Nblock()) return kFALSE;
5296 Float_t blockXmn,blockXmx,blockZmn,blockZmx;
5297 if (!fPlaneEff->GetBlockBoundaries(key,blockXmn,blockXmx,blockZmn,blockZmx)) return kFALSE;
5298 //***************
5299 // DEFINITION OF SEARCH ROAD FOR accepting a track
5300 //
5301 //For the time being they are hard-wired, later on from AliITSRecoParam
5302 // Double_t nsigx=AliITSRecoParam::GetNSigXFarFromBoundary();
5303 // Double_t nsigz=AliITSRecoParam::GetNSigZFarFromBoundary();
5304 Double_t nsigz=4;
5305 Double_t nsigx=4;
5306 Double_t dx=nsigx*TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
5307 Double_t dz=nsigz*TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
5308 // done for RecPoints
5309
5310 // exclude tracks at boundary between detectors
5311 //Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidthPlaneEff();
5312 Double_t boundaryWidth=0; // for the time being hard-wired, later on from AliITSRecoParam
5313 AliDebug(2,Form("Tracking: track impact x=%f, y=%f, z=%f",tmp.GetX(), tmp.GetY(), tmp.GetZ()));
5314 AliDebug(2,Form("Local: track impact x=%f, z=%f",locx,locz));
5315 AliDebug(2,Form("Search Road. Tracking: dy=%f , dz=%f",dx,dz));
5316
5317 if ( (locx-dx < blockXmn+boundaryWidth) ||
5318 (locx+dx > blockXmx-boundaryWidth) ||
5319 (locz-dz < blockZmn+boundaryWidth) ||
5320 (locz+dz > blockZmx-boundaryWidth) ) return kFALSE;
5321 return kTRUE;
5322}
5323//------------------------------------------------------------------------
5324void AliITStrackerMI::UseTrackForPlaneEff(const AliITStrackMI* track, Int_t ilayer) {
5325//
5326// This Method has to be optimized! For the time-being it uses the same criteria
5327// as those used in the search of extra clusters for overlapping modules.
5328//
5329// Method Purpose: estabilish whether a track has produced a recpoint or not
5330// in the layer under study (For Plane efficiency)
5331//
5332// inputs: AliITStrackMI* track (pointer to a usable track)
5333// outputs: none
5334// side effects: update (by 1 count) the Plane Efficiency statistics of the basic block
5335// traversed by this very track. In details:
5336// - if a cluster can be associated to the track then call
5337// AliITSPlaneEff::UpDatePlaneEff(key,kTRUE);
5338// - if not, the AliITSPlaneEff::UpDatePlaneEff(key,kFALSE) is called
5339//
5340 if(!fPlaneEff)
5341 {AliWarning("UseTrackForPlaneEff: null pointer to AliITSPlaneEff"); return;}
5342 AliITSlayer &layer=fgLayers[ilayer];
5343 Double_t r=layer.GetR();
5344 AliITStrackMI tmp(*track);
5345
5346// detector number
5347 Double_t phi,z;
5348 if (!tmp.GetPhiZat(r,phi,z)) return;
5349 Int_t idet=layer.FindDetectorIndex(phi,z);
5350
5351 if(idet<0) { AliInfo(Form("cannot find detector"));
5352 return;}
5353
5354
5355//propagate to the intersection with the detector plane
5356 const AliITSdetector &det=layer.GetDetector(idet);
5357 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return;
5358
5359
5360//***************
5361// DEFINITION OF SEARCH ROAD FOR CLUSTERS SELECTION
5362//
5363 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
5364 TMath::Sqrt(tmp.GetSigmaZ2() +
5365 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
5366 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
5367 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
5368 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
5369 TMath::Sqrt(tmp.GetSigmaY2() +
5370 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
5371 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
5372 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
5373
5374// road in global (rphi,z) [i.e. in tracking ref. system]
5375 Double_t zmin = tmp.GetZ() - dz;
5376 Double_t zmax = tmp.GetZ() + dz;
5377 Double_t ymin = tmp.GetY() + r*det.GetPhi() - dy;
5378 Double_t ymax = tmp.GetY() + r*det.GetPhi() + dy;
5379
5380// select clusters in road
5381 layer.SelectClusters(zmin,zmax,ymin,ymax);
5382
5383// Define criteria for track-cluster association
5384 Double_t msz = tmp.GetSigmaZ2() +
5385 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
5386 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
5387 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
5388 Double_t msy = tmp.GetSigmaY2() +
5389 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
5390 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
5391 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
5392 if (tmp.GetConstrain()) {
5393 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
5394 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
5395 } else {
5396 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
5397 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
5398 }
5399 msz = 1./msz; // 1/RoadZ^2
5400 msy = 1./msy; // 1/RoadY^2
5401//
5402
5403 const AliITSRecPoint *cl=0; Int_t clidx=-1, ci=-1;
5404 Int_t idetc=-1;
5405 Double_t chi2trkcl=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
5406 //Double_t tolerance=0.2;
5407 /*while ((cl=layer.GetNextCluster(clidx))!=0) {
5408 idetc = cl->GetDetectorIndex();
5409 if(idet!=idetc) continue;
5410 //Int_t ilay = cl->GetLayer();
5411
5412 if (TMath::Abs(tmp.GetZ() - cl->GetZ()) > tolerance) continue;
5413 if (TMath::Abs(tmp.GetY() - cl->GetY()) > tolerance) continue;
5414
5415 Double_t chi2=tmp.GetPredictedChi2(cl);
5416 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; }
5417 }*/
5418 Float_t locx; //
5419 Float_t locz; //
5420 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return;
5421//
5422 AliDebug(2,Form("ilayer= %d, idet=%d, x= %f, z=%f",ilayer,idet,locx,locz));
5423 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
5424 if(key>fPlaneEff->Nblock()) return;
5425 Bool_t found=kFALSE;
5426 //if (ci>=0) {
5427 Double_t chi2;
5428 while ((cl=layer.GetNextCluster(clidx))!=0) {
5429 idetc = cl->GetDetectorIndex();
5430 if(idet!=idetc) continue;
5431 // here real control to see whether the cluster can be associated to the track.
5432 // cluster not associated to track
5433 if ( (tmp.GetZ()-cl->GetZ())*(tmp.GetZ()-cl->GetZ())*msz +
5434 (tmp.GetY()-cl->GetY())*(tmp.GetY()-cl->GetY())*msy > 1. ) continue;
5435 // calculate track-clusters chi2
5436 chi2 = GetPredictedChi2MI(&tmp,cl,ilayer); // note that this method change track tmp
5437 // in particular, the error associated to the cluster
5438 //Double_t chi2 = tmp.GetPredictedChi(cl); // this method does not change track tmp
5439 // chi2 cut
5440 if (chi2 > AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) continue;
5441 found=kTRUE;
5442 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; } // this just to trace which cluster is selected
5443 // track->SetExtraCluster(ilayer,(ilayer<<28)+ci);
5444 // track->SetExtraModule(ilayer,idetExtra);
5445 }
5446 if(!fPlaneEff->UpDatePlaneEff(found,key))
5447 AliWarning(Form("UseTrackForPlaneEff: cannot UpDate PlaneEff for key=%d",key));
5448 if(fPlaneEff->GetCreateHistos()&& AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) {
5449 Float_t tr[4]={99999.,99999.,9999.,9999.}; // initialize to high values
5450 Float_t clu[4]={-99999.,-99999.,9999.,9999.}; // (in some cases GetCov fails)
5451 Int_t cltype[2]={-999,-999};
5452
5453 tr[0]=locx;
5454 tr[1]=locz;
5455 tr[2]=TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
5456 tr[3]=TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
5457
5458 if (found){
5459 clu[0]=layer.GetCluster(ci)->GetDetLocalX();
5460 clu[1]=layer.GetCluster(ci)->GetDetLocalZ();
5461 cltype[0]=layer.GetCluster(ci)->GetNy();
5462 cltype[1]=layer.GetCluster(ci)->GetNz();
5463
5464 // Without the following 6 lines you would retrieve the nominal error of a cluster (e.g. for the SPD:
5465 // X->50/sqrt(12)=14 micron Z->450/sqrt(12)= 120 micron)
5466 // Within AliTrackerMI/AliTrackMI the error on the cluster is associated to the AliITStrackMI (fSigmaY,Z)
5467 // It is computed properly by calling the method
5468 // AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
5469 // T
5470 //Double_t x=0.5*(tmp.GetX()+layer.GetCluster(ci)->GetX()); // Take into account the mis-alignment
5471 //if (tmp.PropagateTo(x,0.,0.)) {
5472 chi2=GetPredictedChi2MI(&tmp,layer.GetCluster(ci),ilayer);
5473 AliCluster c(*layer.GetCluster(ci));
5474 c.SetSigmaY2(tmp.GetSigmaY(ilayer)*tmp.GetSigmaY(ilayer));
5475 c.SetSigmaZ2(tmp.GetSigmaZ(ilayer)*tmp.GetSigmaZ(ilayer));
5476 //if (layer.GetCluster(ci)->GetGlobalCov(cov)) // by using this, instead, you got nominal cluster errors
5477 clu[2]=TMath::Sqrt(c.GetSigmaY2());
5478 clu[3]=TMath::Sqrt(c.GetSigmaZ2());
5479 //}
5480 }
5481 fPlaneEff->FillHistos(key,found,tr,clu,cltype);
5482 }
5483return;
5484}