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Store number of TRD tracklets on ESD for tracking and PID. Reuse data
[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.cxx
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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 "AliITStrackerMI.h"
63
64ClassImp(AliITStrackerMI)
65
66AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[AliITSgeomTGeo::kNLayers]; // ITS layers
67
68AliITStrackerMI::AliITStrackerMI():AliTracker(),
69fI(0),
70fBestTrack(),
71fTrackToFollow(),
72fTrackHypothesys(),
73fBestHypothesys(),
74fOriginal(),
75fCurrentEsdTrack(),
76fPass(0),
77fAfterV0(kFALSE),
78fLastLayerToTrackTo(0),
79fCoefficients(0),
80fEsd(0),
81fTrackingPhase("Default"),
82fUseTGeo(3),
83fNtracks(0),
84fxOverX0Pipe(-1.),
85fxTimesRhoPipe(-1.),
86fxOverX0PipeTrks(0),
87fxTimesRhoPipeTrks(0),
88fxOverX0ShieldTrks(0),
89fxTimesRhoShieldTrks(0),
90fxOverX0LayerTrks(0),
91fxTimesRhoLayerTrks(0),
92fDebugStreamer(0),
93fITSChannelStatus(0),
94fkDetTypeRec(0),
95fPlaneEff(0) {
96 //Default constructor
97 Int_t i;
98 for(i=0;i<4;i++) fSPDdetzcentre[i]=0.;
99 for(i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
100 for(i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
101}
102//------------------------------------------------------------------------
103AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
104fI(AliITSgeomTGeo::GetNLayers()),
105fBestTrack(),
106fTrackToFollow(),
107fTrackHypothesys(),
108fBestHypothesys(),
109fOriginal(),
110fCurrentEsdTrack(),
111fPass(0),
112fAfterV0(kFALSE),
113fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()),
114fCoefficients(0),
115fEsd(0),
116fTrackingPhase("Default"),
117fUseTGeo(3),
118fNtracks(0),
119fxOverX0Pipe(-1.),
120fxTimesRhoPipe(-1.),
121fxOverX0PipeTrks(0),
122fxTimesRhoPipeTrks(0),
123fxOverX0ShieldTrks(0),
124fxTimesRhoShieldTrks(0),
125fxOverX0LayerTrks(0),
126fxTimesRhoLayerTrks(0),
127fDebugStreamer(0),
128fITSChannelStatus(0),
129fkDetTypeRec(0),
130fPlaneEff(0) {
131 //--------------------------------------------------------------------
132 //This is the AliITStrackerMI constructor
133 //--------------------------------------------------------------------
134 if (geom) {
135 AliWarning("\"geom\" is actually a dummy argument !");
136 }
137
138 fCoefficients = 0;
139 fAfterV0 = kFALSE;
140
141 for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
142 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
143 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
144
145 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
146 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
147 Double_t poff=TMath::ATan2(y,x);
148 Double_t zoff=z;
149 Double_t r=TMath::Sqrt(x*x + y*y);
150
151 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
152 r += TMath::Sqrt(x*x + y*y);
153 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
154 r += TMath::Sqrt(x*x + y*y);
155 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
156 r += TMath::Sqrt(x*x + y*y);
157 r*=0.25;
158
159 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
160
161 for (Int_t j=1; j<nlad+1; j++) {
162 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
163 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
164 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
165 m.Multiply(tm);
166 Double_t txyz[3]={0.};
167 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
168 m.LocalToMaster(txyz,xyz);
169 r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
170 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
171
172 if (phi<0) phi+=TMath::TwoPi();
173 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
174
175 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
176 new(&det) AliITSdetector(r,phi);
177 // compute the real radius (with misalignment)
178 TGeoHMatrix mmisal(*(AliITSgeomTGeo::GetMatrix(i,j,k)));
179 mmisal.Multiply(tm);
180 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
181 mmisal.LocalToMaster(txyz,xyz);
182 Double_t rmisal=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
183 det.SetRmisal(rmisal);
184
185 } // end loop on detectors
186 } // end loop on ladders
187 } // end loop on layers
188
189
190 fI=AliITSgeomTGeo::GetNLayers();
191
192 fPass=0;
193 fConstraint[0]=1; fConstraint[1]=0;
194
195 Double_t xyzVtx[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
196 AliITSReconstructor::GetRecoParam()->GetYVdef(),
197 AliITSReconstructor::GetRecoParam()->GetZVdef()};
198 Double_t ersVtx[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
199 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
200 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
201 SetVertex(xyzVtx,ersVtx);
202
203 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i);
204 fLastLayerToTrackTo=AliITSRecoParam::GetLastLayerToTrackTo();
205 for (Int_t i=0;i<100000;i++){
206 fBestTrackIndex[i]=0;
207 }
208
209 // store positions of centre of SPD modules (in z)
210 Double_t tr[3];
211 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
212 fSPDdetzcentre[0] = tr[2];
213 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
214 fSPDdetzcentre[1] = tr[2];
215 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
216 fSPDdetzcentre[2] = tr[2];
217 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
218 fSPDdetzcentre[3] = tr[2];
219
220 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
221 if(AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance() && fUseTGeo!=1 && fUseTGeo!=3) {
222 AliWarning("fUseTGeo changed to 3 because fExtendedEtaAcceptance is kTRUE");
223 fUseTGeo = 3;
224 }
225
226 for(Int_t i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
227 for(Int_t i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
228
229 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
230
231 // only for plane efficiency evaluation
232 if (AliITSReconstructor::GetRecoParam()->GetComputePlaneEff()) {
233 Int_t iplane=AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff();
234 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(iplane))
235 AliWarning(Form("Evaluation of Plane Eff for layer %d will be attempted without removing it from tracker",iplane));
236 if (iplane<2) fPlaneEff = new AliITSPlaneEffSPD();
237 else if (iplane<4) fPlaneEff = new AliITSPlaneEffSDD();
238 else fPlaneEff = new AliITSPlaneEffSSD();
239 if(AliITSReconstructor::GetRecoParam()->GetReadPlaneEffFromOCDB())
240 if(!fPlaneEff->ReadFromCDB()) {AliWarning("AliITStrackerMI reading of AliITSPlaneEff from OCDB failed") ;}
241 if(AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) fPlaneEff->SetCreateHistos(kTRUE);
242 }
243}
244//------------------------------------------------------------------------
245AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
246fI(tracker.fI),
247fBestTrack(tracker.fBestTrack),
248fTrackToFollow(tracker.fTrackToFollow),
249fTrackHypothesys(tracker.fTrackHypothesys),
250fBestHypothesys(tracker.fBestHypothesys),
251fOriginal(tracker.fOriginal),
252fCurrentEsdTrack(tracker.fCurrentEsdTrack),
253fPass(tracker.fPass),
254fAfterV0(tracker.fAfterV0),
255fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
256fCoefficients(tracker.fCoefficients),
257fEsd(tracker.fEsd),
258fTrackingPhase(tracker.fTrackingPhase),
259fUseTGeo(tracker.fUseTGeo),
260fNtracks(tracker.fNtracks),
261fxOverX0Pipe(tracker.fxOverX0Pipe),
262fxTimesRhoPipe(tracker.fxTimesRhoPipe),
263fxOverX0PipeTrks(0),
264fxTimesRhoPipeTrks(0),
265fxOverX0ShieldTrks(0),
266fxTimesRhoShieldTrks(0),
267fxOverX0LayerTrks(0),
268fxTimesRhoLayerTrks(0),
269fDebugStreamer(tracker.fDebugStreamer),
270fITSChannelStatus(tracker.fITSChannelStatus),
271fkDetTypeRec(tracker.fkDetTypeRec),
272fPlaneEff(tracker.fPlaneEff) {
273 //Copy constructor
274 Int_t i;
275 for(i=0;i<4;i++) {
276 fSPDdetzcentre[i]=tracker.fSPDdetzcentre[i];
277 }
278 for(i=0;i<6;i++) {
279 fxOverX0Layer[i]=tracker.fxOverX0Layer[i];
280 fxTimesRhoLayer[i]=tracker.fxTimesRhoLayer[i];
281 }
282 for(i=0;i<2;i++) {
283 fxOverX0Shield[i]=tracker.fxOverX0Shield[i];
284 fxTimesRhoShield[i]=tracker.fxTimesRhoShield[i];
285 }
286}
287//------------------------------------------------------------------------
288AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
289 //Assignment operator
290 this->~AliITStrackerMI();
291 new(this) AliITStrackerMI(tracker);
292 return *this;
293}
294//------------------------------------------------------------------------
295AliITStrackerMI::~AliITStrackerMI()
296{
297 //
298 //destructor
299 //
300 if (fCoefficients) delete [] fCoefficients;
301 DeleteTrksMaterialLUT();
302 if (fDebugStreamer) {
303 //fDebugStreamer->Close();
304 delete fDebugStreamer;
305 }
306 if(fITSChannelStatus) delete fITSChannelStatus;
307 if(fPlaneEff) delete fPlaneEff;
308}
309//------------------------------------------------------------------------
310void AliITStrackerMI::SetLayersNotToSkip(const Int_t *l) {
311 //--------------------------------------------------------------------
312 //This function set masks of the layers which must be not skipped
313 //--------------------------------------------------------------------
314 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=l[i];
315}
316//------------------------------------------------------------------------
317void AliITStrackerMI::ReadBadFromDetTypeRec() {
318 //--------------------------------------------------------------------
319 //This function read ITS bad detectors, chips, channels from AliITSDetTypeRec
320 //i.e. from OCDB
321 //--------------------------------------------------------------------
322
323 if(!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return;
324
325 Info("ReadBadFromDetTypeRec","Reading info about bad ITS detectors and channels");
326
327 if(!fkDetTypeRec) Error("ReadBadFromDetTypeRec","AliITSDetTypeRec nof found!\n");
328
329 // ITS channels map
330 if(fITSChannelStatus) delete fITSChannelStatus;
331 fITSChannelStatus = new AliITSChannelStatus(fkDetTypeRec);
332
333 // ITS detectors and chips
334 Int_t i=0,j=0,k=0,ndet=0;
335 for (i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
336 Int_t nBadDetsPerLayer=0;
337 ndet=AliITSgeomTGeo::GetNDetectors(i);
338 for (j=1; j<AliITSgeomTGeo::GetNLadders(i)+1; j++) {
339 for (k=1; k<ndet+1; k++) {
340 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
341 det.ReadBadDetectorAndChips(i-1,(j-1)*ndet + k-1,fkDetTypeRec);
342 if(det.IsBad()) {nBadDetsPerLayer++;}
343 } // end loop on detectors
344 } // end loop on ladders
345 Info("ReadBadFromDetTypeRec",Form("Layer %d: %d bad out of %d",i-1,nBadDetsPerLayer,ndet*AliITSgeomTGeo::GetNLadders(i)));
346 } // end loop on layers
347
348 return;
349}
350//------------------------------------------------------------------------
351Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
352 //--------------------------------------------------------------------
353 //This function loads ITS clusters
354 //--------------------------------------------------------------------
355 TBranch *branch=cTree->GetBranch("ITSRecPoints");
356 if (!branch) {
357 Error("LoadClusters"," can't get the branch !\n");
358 return 1;
359 }
360
361 static TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
362 branch->SetAddress(&clusters);
363
364 Int_t i=0,j=0,ndet=0;
365 Int_t detector=0;
366 for (i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
367 ndet=fgLayers[i].GetNdetectors();
368 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
369 for (; j<jmax; j++) {
370 if (!cTree->GetEvent(j)) continue;
371 Int_t ncl=clusters->GetEntriesFast();
372 SignDeltas(clusters,GetZ());
373
374 while (ncl--) {
375 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
376 detector=c->GetDetectorIndex();
377
378 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
379
380 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
381 }
382 clusters->Delete();
383 // add dead zone "virtual" cluster in SPD, if there is a cluster within
384 // zwindow cm from the dead zone
385 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
386 for (Float_t xdead = 0; xdead < AliITSRecoParam::GetSPDdetxlength(); xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
387 Int_t lab[4] = {0,0,0,detector};
388 Int_t info[3] = {0,0,i};
389 Float_t q = 0.; // this identifies virtual clusters
390 Float_t hit[5] = {xdead,
391 0.,
392 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
393 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
394 q};
395 Bool_t local = kTRUE;
396 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
397 hit[1] = fSPDdetzcentre[0]+0.5*AliITSRecoParam::GetSPDdetzlength();
398 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
399 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
400 hit[1] = fSPDdetzcentre[1]-0.5*AliITSRecoParam::GetSPDdetzlength();
401 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
402 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
403 hit[1] = fSPDdetzcentre[1]+0.5*AliITSRecoParam::GetSPDdetzlength();
404 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
405 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
406 hit[1] = fSPDdetzcentre[2]-0.5*AliITSRecoParam::GetSPDdetzlength();
407 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
408 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
409 hit[1] = fSPDdetzcentre[2]+0.5*AliITSRecoParam::GetSPDdetzlength();
410 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
411 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
412 hit[1] = fSPDdetzcentre[3]-0.5*AliITSRecoParam::GetSPDdetzlength();
413 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
414 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
415 }
416 } // "virtual" clusters in SPD
417
418 }
419 //
420 fgLayers[i].ResetRoad(); //road defined by the cluster density
421 fgLayers[i].SortClusters();
422 }
423
424 dummy.Clear();
425
426 return 0;
427}
428//------------------------------------------------------------------------
429void AliITStrackerMI::UnloadClusters() {
430 //--------------------------------------------------------------------
431 //This function unloads ITS clusters
432 //--------------------------------------------------------------------
433 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
434}
435//------------------------------------------------------------------------
436void AliITStrackerMI::FillClusterArray(TObjArray* array) const {
437 //--------------------------------------------------------------------
438 // Publishes all pointers to clusters known to the tracker into the
439 // passed object array.
440 // The ownership is not transfered - the caller is not expected to delete
441 // the clusters.
442 //--------------------------------------------------------------------
443
444 for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
445 for(Int_t icl=0; icl<fgLayers[i].GetNumberOfClusters(); icl++) {
446 AliCluster *cl = (AliCluster*)fgLayers[i].GetCluster(icl);
447 array->AddLast(cl);
448 }
449 }
450
451 return;
452}
453//------------------------------------------------------------------------
454static Int_t CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
455 //--------------------------------------------------------------------
456 // Correction for the material between the TPC and the ITS
457 //--------------------------------------------------------------------
458 if (t->GetX() > AliITSRecoParam::Getriw()) { // inward direction
459 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw(),1)) return 0;// TPC inner wall
460 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
461 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
462 } else if (t->GetX() < AliITSRecoParam::Getrs()) { // outward direction
463 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
464 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
465 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw()+0.001,1)) return 0;// TPC inner wall
466 } else {
467 Error("CorrectForTPCtoITSDeadZoneMaterial","Track is already in the dead zone !");
468 return 0;
469 }
470
471 return 1;
472}
473//------------------------------------------------------------------------
474Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
475 //--------------------------------------------------------------------
476 // This functions reconstructs ITS tracks
477 // The clusters must be already loaded !
478 //--------------------------------------------------------------------
479
480
481 fTrackingPhase="Clusters2Tracks";
482
483 TObjArray itsTracks(15000);
484 fOriginal.Clear();
485 fEsd = event; // store pointer to the esd
486
487 // temporary (for cosmics)
488 if(event->GetVertex()) {
489 TString title = event->GetVertex()->GetTitle();
490 if(title.Contains("cosmics")) {
491 Double_t xyz[3]={GetX(),GetY(),GetZ()};
492 Double_t exyz[3]={0.1,0.1,0.1};
493 SetVertex(xyz,exyz);
494 }
495 }
496 // temporary
497
498 {/* Read ESD tracks */
499 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
500 Int_t nentr=event->GetNumberOfTracks();
501 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
502 while (nentr--) {
503 AliESDtrack *esd=event->GetTrack(nentr);
504 // ---- for debugging:
505 //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); }
506
507 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
508 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
509 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
510 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
511 AliITStrackMI *t=0;
512 try {
513 t=new AliITStrackMI(*esd);
514 } catch (const Char_t *msg) {
515 //Warning("Clusters2Tracks",msg);
516 delete t;
517 continue;
518 }
519 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
520 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
521
522
523 // look at the ESD mass hypothesys !
524 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
525 // write expected q
526 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
527
528 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
529 //track - can be V0 according to TPC
530 } else {
531 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
532 delete t;
533 continue;
534 }
535 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
536 delete t;
537 continue;
538 }
539 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
540 delete t;
541 continue;
542 }
543 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
544 delete t;
545 continue;
546 }
547 }
548 t->SetReconstructed(kFALSE);
549 itsTracks.AddLast(t);
550 fOriginal.AddLast(t);
551 }
552 } /* End Read ESD tracks */
553
554 itsTracks.Sort();
555 fOriginal.Sort();
556 Int_t nentr=itsTracks.GetEntriesFast();
557 fTrackHypothesys.Expand(nentr);
558 fBestHypothesys.Expand(nentr);
559 MakeCoefficients(nentr);
560 if(fUseTGeo==3 || fUseTGeo==4) MakeTrksMaterialLUT(event->GetNumberOfTracks());
561 Int_t ntrk=0;
562 // THE TWO TRACKING PASSES
563 for (fPass=0; fPass<2; fPass++) {
564 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
565 for (fCurrentEsdTrack=0; fCurrentEsdTrack<nentr; fCurrentEsdTrack++) {
566 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(fCurrentEsdTrack);
567 if (t==0) continue; //this track has been already tracked
568 //cout<<"========== "<<fPass<<" "<<fCurrentEsdTrack<<" =========\n";
569 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
570 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
571 if (fConstraint[fPass]) {
572 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
573 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
574 }
575
576 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
577 AliDebug(2,Form("LABEL %d pass %d",tpcLabel,fPass));
578 fI = 6;
579 ResetTrackToFollow(*t);
580 ResetBestTrack();
581
582 FollowProlongationTree(t,fCurrentEsdTrack,fConstraint[fPass]);
583
584
585 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
586 //
587 AliITStrackMI *besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
588 if (!besttrack) continue;
589 besttrack->SetLabel(tpcLabel);
590 // besttrack->CookdEdx();
591 CookdEdx(besttrack);
592 besttrack->SetFakeRatio(1.);
593 CookLabel(besttrack,0.); //For comparison only
594 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
595
596 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
597
598 t->SetReconstructed(kTRUE);
599 ntrk++;
600 AliDebug(2,Form("TRACK! (label %d) ncls %d",besttrack->GetLabel(),besttrack->GetNumberOfClusters()));
601 }
602 GetBestHypothesysMIP(itsTracks);
603 } // end loop on the two tracking passes
604
605 if(event->GetNumberOfV0s()>0) UpdateTPCV0(event);
606 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) FindV02(event);
607 fAfterV0 = kTRUE;
608 //
609 itsTracks.Delete();
610 //
611 Int_t entries = fTrackHypothesys.GetEntriesFast();
612 for (Int_t ientry=0; ientry<entries; ientry++) {
613 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
614 if (array) array->Delete();
615 delete fTrackHypothesys.RemoveAt(ientry);
616 }
617
618 fTrackHypothesys.Delete();
619 fBestHypothesys.Delete();
620 fOriginal.Clear();
621 delete [] fCoefficients;
622 fCoefficients=0;
623 DeleteTrksMaterialLUT();
624
625 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
626
627 fTrackingPhase="Default";
628
629 return 0;
630}
631//------------------------------------------------------------------------
632Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
633 //--------------------------------------------------------------------
634 // This functions propagates reconstructed ITS tracks back
635 // The clusters must be loaded !
636 //--------------------------------------------------------------------
637 fTrackingPhase="PropagateBack";
638 Int_t nentr=event->GetNumberOfTracks();
639 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
640
641 Int_t ntrk=0;
642 for (Int_t i=0; i<nentr; i++) {
643 AliESDtrack *esd=event->GetTrack(i);
644
645 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
646 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
647
648 AliITStrackMI *t=0;
649 try {
650 t=new AliITStrackMI(*esd);
651 } catch (const Char_t *msg) {
652 //Warning("PropagateBack",msg);
653 delete t;
654 continue;
655 }
656 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
657
658 ResetTrackToFollow(*t);
659
660 // propagate to vertex [SR, GSI 17.02.2003]
661 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
662 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
663 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
664 fTrackToFollow.StartTimeIntegral();
665 // from vertex to outside pipe
666 CorrectForPipeMaterial(&fTrackToFollow,"outward");
667 }
668
669 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
670 if (RefitAt(AliITSRecoParam::GetrInsideITSscreen(),&fTrackToFollow,t)) {
671 if (!CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)) {
672 delete t;
673 continue;
674 }
675 fTrackToFollow.SetLabel(t->GetLabel());
676 //fTrackToFollow.CookdEdx();
677 CookLabel(&fTrackToFollow,0.); //For comparison only
678 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
679 //UseClusters(&fTrackToFollow);
680 ntrk++;
681 }
682 delete t;
683 }
684
685 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
686
687 fTrackingPhase="Default";
688
689 return 0;
690}
691//------------------------------------------------------------------------
692Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
693 //--------------------------------------------------------------------
694 // This functions refits ITS tracks using the
695 // "inward propagated" TPC tracks
696 // The clusters must be loaded !
697 //--------------------------------------------------------------------
698 fTrackingPhase="RefitInward";
699 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) RefitV02(event);
700 Int_t nentr=event->GetNumberOfTracks();
701 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
702
703 Int_t ntrk=0;
704 for (Int_t i=0; i<nentr; i++) {
705 AliESDtrack *esd=event->GetTrack(i);
706
707 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
708 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
709 if (esd->GetStatus()&AliESDtrack::kTPCout)
710 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
711
712 AliITStrackMI *t=0;
713 try {
714 t=new AliITStrackMI(*esd);
715 } catch (const Char_t *msg) {
716 //Warning("RefitInward",msg);
717 delete t;
718 continue;
719 }
720 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
721 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
722 delete t;
723 continue;
724 }
725
726 ResetTrackToFollow(*t);
727 fTrackToFollow.ResetClusters();
728
729 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
730 fTrackToFollow.ResetCovariance(10.);
731
732 //Refitting...
733 Bool_t pe=AliITSReconstructor::GetRecoParam()->GetComputePlaneEff();
734 AliDebug(2,Form("Refit LABEL %d %d",t->GetLabel(),t->GetNumberOfClusters()));
735 if (RefitAt(AliITSRecoParam::GetrInsideSPD1(),&fTrackToFollow,t,kTRUE,pe)) {
736 AliDebug(2," refit OK");
737 fTrackToFollow.SetLabel(t->GetLabel());
738 // fTrackToFollow.CookdEdx();
739 CookdEdx(&fTrackToFollow);
740
741 CookLabel(&fTrackToFollow,0.0); //For comparison only
742
743 //The beam pipe
744 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
745 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
746 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
747 //printf(" %d\n",esdTrack->GetITSModuleIndex(0));
748 //esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); //original line
749 Double_t r[3]={0.,0.,0.};
750 Double_t maxD=3.;
751 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
752 ntrk++;
753 }
754 }
755 delete t;
756 }
757
758 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
759
760 fTrackingPhase="Default";
761
762 return 0;
763}
764//------------------------------------------------------------------------
765AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
766 //--------------------------------------------------------------------
767 // Return pointer to a given cluster
768 //--------------------------------------------------------------------
769 Int_t l=(index & 0xf0000000) >> 28;
770 Int_t c=(index & 0x0fffffff) >> 00;
771 return fgLayers[l].GetCluster(c);
772}
773//------------------------------------------------------------------------
774Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
775 //--------------------------------------------------------------------
776 // Get track space point with index i
777 //--------------------------------------------------------------------
778
779 Int_t l=(index & 0xf0000000) >> 28;
780 Int_t c=(index & 0x0fffffff) >> 00;
781 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
782 Int_t idet = cl->GetDetectorIndex();
783
784 Float_t xyz[3];
785 Float_t cov[6];
786 cl->GetGlobalXYZ(xyz);
787 cl->GetGlobalCov(cov);
788 p.SetXYZ(xyz, cov);
789 p.SetCharge(cl->GetQ());
790 p.SetDriftTime(cl->GetDriftTime());
791 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
792 switch (l) {
793 case 0:
794 iLayer = AliGeomManager::kSPD1;
795 break;
796 case 1:
797 iLayer = AliGeomManager::kSPD2;
798 break;
799 case 2:
800 iLayer = AliGeomManager::kSDD1;
801 break;
802 case 3:
803 iLayer = AliGeomManager::kSDD2;
804 break;
805 case 4:
806 iLayer = AliGeomManager::kSSD1;
807 break;
808 case 5:
809 iLayer = AliGeomManager::kSSD2;
810 break;
811 default:
812 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
813 break;
814 };
815 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
816 p.SetVolumeID((UShort_t)volid);
817 return kTRUE;
818}
819//------------------------------------------------------------------------
820Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
821 AliTrackPoint& p, const AliESDtrack *t) {
822 //--------------------------------------------------------------------
823 // Get track space point with index i
824 // (assign error estimated during the tracking)
825 //--------------------------------------------------------------------
826
827 Int_t l=(index & 0xf0000000) >> 28;
828 Int_t c=(index & 0x0fffffff) >> 00;
829 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
830 Int_t idet = cl->GetDetectorIndex();
831
832 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
833
834 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
835 Float_t detxy[2];
836 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
837 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
838 Double_t alpha = t->GetAlpha();
839 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
840 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe,GetBz()));
841 phi += alpha-det.GetPhi();
842 Float_t tgphi = TMath::Tan(phi);
843
844 Float_t tgl = t->GetTgl(); // tgl about const along track
845 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
846
847 Float_t errlocalx,errlocalz;
848 Bool_t addMisalErr=kFALSE;
849 AliITSClusterParam::GetError(l,cl,tgl,tgphi,expQ,errlocalx,errlocalz,addMisalErr);
850
851 Float_t xyz[3];
852 Float_t cov[6];
853 cl->GetGlobalXYZ(xyz);
854 // cl->GetGlobalCov(cov);
855 Float_t pos[3] = {0.,0.,0.};
856 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errlocalx*errlocalx,errlocalz*errlocalz,0);
857 tmpcl.GetGlobalCov(cov);
858
859 p.SetXYZ(xyz, cov);
860 p.SetCharge(cl->GetQ());
861 p.SetDriftTime(cl->GetDriftTime());
862
863 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
864 switch (l) {
865 case 0:
866 iLayer = AliGeomManager::kSPD1;
867 break;
868 case 1:
869 iLayer = AliGeomManager::kSPD2;
870 break;
871 case 2:
872 iLayer = AliGeomManager::kSDD1;
873 break;
874 case 3:
875 iLayer = AliGeomManager::kSDD2;
876 break;
877 case 4:
878 iLayer = AliGeomManager::kSSD1;
879 break;
880 case 5:
881 iLayer = AliGeomManager::kSSD2;
882 break;
883 default:
884 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
885 break;
886 };
887 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
888
889 p.SetVolumeID((UShort_t)volid);
890 return kTRUE;
891}
892//------------------------------------------------------------------------
893void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
894{
895 //--------------------------------------------------------------------
896 // Follow prolongation tree
897 //--------------------------------------------------------------------
898 //
899 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
900 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
901
902
903 AliESDtrack * esd = otrack->GetESDtrack();
904 if (esd->GetV0Index(0)>0) {
905 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
906 // mapping of ESD track is different as ITS track in Containers
907 // Need something more stable
908 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
909 for (Int_t i=0;i<3;i++){
910 Int_t index = esd->GetV0Index(i);
911 if (index==0) break;
912 AliESDv0 * vertex = fEsd->GetV0(index);
913 if (vertex->GetStatus()<0) continue; // rejected V0
914 //
915 if (esd->GetSign()>0) {
916 vertex->SetIndex(0,esdindex);
917 } else {
918 vertex->SetIndex(1,esdindex);
919 }
920 }
921 }
922 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
923 if (!bestarray){
924 bestarray = new TObjArray(5);
925 fBestHypothesys.AddAt(bestarray,esdindex);
926 }
927
928 //
929 //setup tree of the prolongations
930 //
931 static AliITStrackMI tracks[7][100];
932 AliITStrackMI *currenttrack;
933 static AliITStrackMI currenttrack1;
934 static AliITStrackMI currenttrack2;
935 static AliITStrackMI backuptrack;
936 Int_t ntracks[7];
937 Int_t nindexes[7][100];
938 Float_t normalizedchi2[100];
939 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
940 otrack->SetNSkipped(0);
941 new (&(tracks[6][0])) AliITStrackMI(*otrack);
942 ntracks[6]=1;
943 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
944 Int_t modstatus = 1; // found
945 Float_t xloc,zloc;
946 //
947 //
948 // follow prolongations
949 for (Int_t ilayer=5; ilayer>=0; ilayer--) {
950 AliDebug(2,Form("FollowProlongationTree: layer %d",ilayer));
951 fI = ilayer;
952 //
953 AliITSlayer &layer=fgLayers[ilayer];
954 Double_t r = layer.GetR();
955 ntracks[ilayer]=0;
956 //
957 //
958 Int_t nskipped=0;
959 Float_t nused =0;
960 for (Int_t itrack =0; itrack<ntracks[ilayer+1]; itrack++) {
961 //set current track
962 if (ntracks[ilayer]>=100) break;
963 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
964 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
965 if (ntracks[ilayer]>15+ilayer){
966 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
967 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
968 }
969
970 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
971
972 // material between SSD and SDD, SDD and SPD
973 if (ilayer==3)
974 if(!CorrectForShieldMaterial(&currenttrack1,"SDD","inward")) continue;
975 if (ilayer==1)
976 if(!CorrectForShieldMaterial(&currenttrack1,"SPD","inward")) continue;
977
978 // detector number
979 Double_t phi,z;
980 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
981 Int_t idet=layer.FindDetectorIndex(phi,z);
982
983 Double_t trackGlobXYZ1[3];
984 if (!currenttrack1.GetXYZ(trackGlobXYZ1)) continue;
985
986 // Get the budget to the primary vertex for the current track being prolonged
987 Double_t budgetToPrimVertex = GetEffectiveThickness();
988
989 // check if we allow a prolongation without point
990 Int_t skip = CheckSkipLayer(&currenttrack1,ilayer,idet);
991 if (skip) {
992 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
993 // propagate to the layer radius
994 Double_t xToGo; if (!vtrack->GetLocalXat(r,xToGo)) continue;
995 if(!vtrack->Propagate(xToGo)) continue;
996 // apply correction for material of the current layer
997 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
998 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
999 vtrack->SetClIndex(ilayer,0);
1000 modstatus = (skip==1 ? 3 : 4); // skipped : out in z
1001 if(LocalModuleCoord(ilayer,idet,vtrack,xloc,zloc)) { // local module coords
1002 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1003 }
1004 if(constrain) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1005 ntracks[ilayer]++;
1006 continue;
1007 }
1008
1009 // track outside layer acceptance in z
1010 if (idet<0) continue;
1011
1012 //propagate to the intersection with the detector plane
1013 const AliITSdetector &det=layer.GetDetector(idet);
1014 new(&currenttrack2) AliITStrackMI(currenttrack1);
1015 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
1016 if (!currenttrack2.Propagate(det.GetPhi(),det.GetR())) continue;
1017 currenttrack1.SetDetectorIndex(idet);
1018 currenttrack2.SetDetectorIndex(idet);
1019 if(!LocalModuleCoord(ilayer,idet,&currenttrack1,xloc,zloc)) continue; // local module coords
1020
1021 //***************
1022 // DEFINITION OF SEARCH ROAD AND CLUSTERS SELECTION
1023 //
1024 // road in global (rphi,z) [i.e. in tracking ref. system]
1025 Double_t zmin,zmax,ymin,ymax;
1026 if (!ComputeRoad(&currenttrack1,ilayer,idet,zmin,zmax,ymin,ymax)) continue;
1027
1028 // select clusters in road
1029 layer.SelectClusters(zmin,zmax,ymin,ymax);
1030 //********************
1031
1032 // Define criteria for track-cluster association
1033 Double_t msz = currenttrack1.GetSigmaZ2() +
1034 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1035 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1036 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
1037 Double_t msy = currenttrack1.GetSigmaY2() +
1038 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1039 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1040 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
1041 if (constrain) {
1042 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
1043 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
1044 } else {
1045 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
1046 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
1047 }
1048 msz = 1./msz; // 1/RoadZ^2
1049 msy = 1./msy; // 1/RoadY^2
1050
1051 //
1052 //
1053 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
1054 //
1055 const AliITSRecPoint *cl=0;
1056 Int_t clidx=-1;
1057 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
1058 Bool_t deadzoneSPD=kFALSE;
1059 currenttrack = &currenttrack1;
1060
1061 // check if the road contains a dead zone
1062 Bool_t noClusters = kFALSE;
1063 if (!layer.GetNextCluster(clidx,kTRUE)) noClusters=kTRUE;
1064 if (noClusters) AliDebug(2,"no clusters in road");
1065 Double_t dz=0.5*(zmax-zmin);
1066 Double_t dy=0.5*(ymax-ymin);
1067 Int_t dead = CheckDeadZone(&currenttrack1,ilayer,idet,dz,dy,noClusters);
1068 if(dead) AliDebug(2,Form("DEAD (%d)\n",dead));
1069 // create a prolongation without clusters (check also if there are no clusters in the road)
1070 if (dead ||
1071 (noClusters &&
1072 AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad())) {
1073 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1074 updatetrack->SetClIndex(ilayer,0);
1075 if (dead==0) {
1076 modstatus = 5; // no cls in road
1077 } else if (dead==1) {
1078 modstatus = 7; // holes in z in SPD
1079 } else if (dead==2 || dead==3) {
1080 modstatus = 2; // dead from OCDB
1081 }
1082 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1083 // apply correction for material of the current layer
1084 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1085 if (constrain) { // apply vertex constrain
1086 updatetrack->SetConstrain(constrain);
1087 Bool_t isPrim = kTRUE;
1088 if (ilayer<4) { // check that it's close to the vertex
1089 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1090 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1091 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1092 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1093 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1094 }
1095 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1096 }
1097 if (dead) {
1098 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1099 if (dead==1) { // dead zone at z=0,+-7cm in SPD
1100 updatetrack->SetDeadZoneProbability(GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1101 deadzoneSPD=kTRUE;
1102 }
1103 }
1104 ntracks[ilayer]++;
1105 }
1106
1107 clidx=-1;
1108 // loop over clusters in the road
1109 while ((cl=layer.GetNextCluster(clidx))!=0) {
1110 if (ntracks[ilayer]>95) break; //space for skipped clusters
1111 Bool_t changedet =kFALSE;
1112 if (cl->GetQ()==0 && deadzoneSPD==kTRUE) continue;
1113 Int_t idetc=cl->GetDetectorIndex();
1114
1115 if (currenttrack->GetDetectorIndex()==idetc) { // track already on the cluster's detector
1116 // take into account misalignment (bring track to real detector plane)
1117 Double_t xTrOrig = currenttrack->GetX();
1118 if (!currenttrack->Propagate(xTrOrig+cl->GetX())) continue;
1119 // a first cut on track-cluster distance
1120 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
1121 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
1122 { // cluster not associated to track
1123 AliDebug(2,"not associated");
1124 continue;
1125 }
1126 // bring track back to ideal detector plane
1127 if (!currenttrack->Propagate(xTrOrig)) continue;
1128 } else { // have to move track to cluster's detector
1129 const AliITSdetector &detc=layer.GetDetector(idetc);
1130 // a first cut on track-cluster distance
1131 Double_t y;
1132 if (!currenttrack2.GetProlongationFast(detc.GetPhi(),detc.GetR()+cl->GetX(),y,z)) continue;
1133 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
1134 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
1135 continue; // cluster not associated to track
1136 //
1137 new (&backuptrack) AliITStrackMI(currenttrack2);
1138 changedet = kTRUE;
1139 currenttrack =&currenttrack2;
1140 if (!currenttrack->Propagate(detc.GetPhi(),detc.GetR())) {
1141 new (currenttrack) AliITStrackMI(backuptrack);
1142 changedet = kFALSE;
1143 continue;
1144 }
1145 currenttrack->SetDetectorIndex(idetc);
1146 // Get again the budget to the primary vertex
1147 // for the current track being prolonged, if had to change detector
1148 //budgetToPrimVertex = GetEffectiveThickness();// not needed at the moment because anyway we take a mean material for this correction
1149 }
1150
1151 // calculate track-clusters chi2
1152 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
1153 // chi2 cut
1154 AliDebug(2,Form("chi2 %f max %f",chi2trkcl,AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)));
1155 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
1156 if (cl->GetQ()==0) deadzoneSPD=kTRUE; // only 1 prolongation with virtual cluster
1157 if (ntracks[ilayer]>=100) continue;
1158 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1159 updatetrack->SetClIndex(ilayer,0);
1160 if (changedet) new (&currenttrack2) AliITStrackMI(backuptrack);
1161
1162 if (cl->GetQ()!=0) { // real cluster
1163 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) {
1164 AliDebug(2,"update failed");
1165 continue;
1166 }
1167 updatetrack->SetSampledEdx(cl->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
1168 modstatus = 1; // found
1169 } else { // virtual cluster in dead zone
1170 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1171 updatetrack->SetDeadZoneProbability(GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1172 modstatus = 7; // holes in z in SPD
1173 }
1174
1175 if (changedet) {
1176 Float_t xlocnewdet,zlocnewdet;
1177 if(LocalModuleCoord(ilayer,idet,updatetrack,xlocnewdet,zlocnewdet)) { // local module coords
1178 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xlocnewdet,zlocnewdet);
1179 }
1180 } else {
1181 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1182 }
1183 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1184
1185 // apply correction for material of the current layer
1186 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1187
1188 if (constrain) { // apply vertex constrain
1189 updatetrack->SetConstrain(constrain);
1190 Bool_t isPrim = kTRUE;
1191 if (ilayer<4) { // check that it's close to the vertex
1192 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1193 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1194 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1195 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1196 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1197 }
1198 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1199 } //apply vertex constrain
1200 ntracks[ilayer]++;
1201 } // create new hypothesis
1202 else {
1203 AliDebug(2,"chi2 too large");
1204 }
1205
1206 } // loop over possible prolongations
1207
1208 // allow one prolongation without clusters
1209 if (constrain && itrack<=1 && currenttrack1.GetNSkipped()==0 && deadzoneSPD==kFALSE && ntracks[ilayer]<100) {
1210 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1211 // apply correction for material of the current layer
1212 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1213 vtrack->SetClIndex(ilayer,0);
1214 modstatus = 3; // skipped
1215 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1216 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1217 vtrack->IncrementNSkipped();
1218 ntracks[ilayer]++;
1219 }
1220
1221 // allow one prolongation without clusters for tracks with |tgl|>1.1
1222 if (constrain && itrack==0 && TMath::Abs(currenttrack1.GetTgl())>1.1) { //big theta - for low flux
1223 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1224 // apply correction for material of the current layer
1225 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1226 vtrack->SetClIndex(ilayer,0);
1227 modstatus = 3; // skipped
1228 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1229 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1230 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
1231 ntracks[ilayer]++;
1232 }
1233
1234
1235 } // loop over tracks in layer ilayer+1
1236
1237 //loop over track candidates for the current layer
1238 //
1239 //
1240 Int_t accepted=0;
1241
1242 Int_t golden=0;
1243 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1244 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
1245 if (normalizedchi2[itrack] <
1246 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
1247 if (ilayer>4) {
1248 accepted++;
1249 } else {
1250 if (constrain) { // constrain
1251 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1252 accepted++;
1253 } else { // !constrain
1254 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1255 accepted++;
1256 }
1257 }
1258 }
1259 // sort tracks by increasing normalized chi2
1260 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
1261 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
1262 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
1263 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
1264 } // end loop over layers
1265
1266
1267 //
1268 // Now select tracks to be kept
1269 //
1270 Int_t max = constrain ? 20 : 5;
1271
1272 // tracks that reach layer 0 (SPD inner)
1273 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
1274 AliITStrackMI & track= tracks[0][nindexes[0][i]];
1275 if (track.GetNumberOfClusters()<2) continue;
1276 if (!constrain && track.GetNormChi2(0) >
1277 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) {
1278 continue;
1279 }
1280 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1281 }
1282
1283 // tracks that reach layer 1 (SPD outer)
1284 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
1285 AliITStrackMI & track= tracks[1][nindexes[1][i]];
1286 if (track.GetNumberOfClusters()<4) continue;
1287 if (!constrain && track.GetNormChi2(1) >
1288 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1289 if (constrain) track.IncrementNSkipped();
1290 if (!constrain) {
1291 track.SetD(0,track.GetD(GetX(),GetY()));
1292 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
1293 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1294 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1295 }
1296 }
1297 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1298 }
1299
1300 // tracks that reach layer 2 (SDD inner), only during non-constrained pass
1301 if (!constrain){
1302 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
1303 AliITStrackMI & track= tracks[2][nindexes[2][i]];
1304 if (track.GetNumberOfClusters()<3) continue;
1305 if (!constrain && track.GetNormChi2(2) >
1306 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1307 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
1308 if (!constrain){
1309 track.SetD(0,track.GetD(GetX(),GetY()));
1310 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
1311 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1312 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1313 }
1314 }
1315 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1316 }
1317 }
1318
1319 if (!constrain) {
1320 //
1321 // register best track of each layer - important for V0 finder
1322 //
1323 for (Int_t ilayer=0;ilayer<5;ilayer++){
1324 if (ntracks[ilayer]==0) continue;
1325 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1326 if (track.GetNumberOfClusters()<1) continue;
1327 CookLabel(&track,0);
1328 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1329 }
1330 }
1331 //
1332 // update TPC V0 information
1333 //
1334 if (otrack->GetESDtrack()->GetV0Index(0)>0){
1335 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1336 for (Int_t i=0;i<3;i++){
1337 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
1338 if (index==0) break;
1339 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
1340 if (vertex->GetStatus()<0) continue; // rejected V0
1341 //
1342 if (otrack->GetSign()>0) {
1343 vertex->SetIndex(0,esdindex);
1344 }
1345 else{
1346 vertex->SetIndex(1,esdindex);
1347 }
1348 //find nearest layer with track info
1349 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1350 Int_t nearestold = GetNearestLayer(xrp); //I.B.
1351 Int_t nearest = nearestold;
1352 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1353 if (ntracks[nearest]==0){
1354 nearest = ilayer;
1355 }
1356 }
1357 //
1358 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1359 if (nearestold<5&&nearest<5){
1360 Bool_t accept = track.GetNormChi2(nearest)<10;
1361 if (accept){
1362 if (track.GetSign()>0) {
1363 vertex->SetParamP(track);
1364 vertex->Update(fprimvertex);
1365 //vertex->SetIndex(0,track.fESDtrack->GetID());
1366 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1367 }else{
1368 vertex->SetParamN(track);
1369 vertex->Update(fprimvertex);
1370 //vertex->SetIndex(1,track.fESDtrack->GetID());
1371 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1372 }
1373 vertex->SetStatus(vertex->GetStatus()+1);
1374 }else{
1375 //vertex->SetStatus(-2); // reject V0 - not enough clusters
1376 }
1377 }
1378 }
1379 }
1380
1381}
1382//------------------------------------------------------------------------
1383AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1384{
1385 //--------------------------------------------------------------------
1386 //
1387 //
1388 return fgLayers[layer];
1389}
1390//------------------------------------------------------------------------
1391AliITStrackerMI::AliITSlayer::AliITSlayer():
1392fR(0),
1393fPhiOffset(0),
1394fNladders(0),
1395fZOffset(0),
1396fNdetectors(0),
1397fDetectors(0),
1398fN(0),
1399fDy5(0),
1400fDy10(0),
1401fDy20(0),
1402fClustersCs(0),
1403fClusterIndexCs(0),
1404fYcs(0),
1405fZcs(0),
1406fNcs(0),
1407fCurrentSlice(-1),
1408fZmax(0),
1409fYmin(0),
1410fYmax(0),
1411fI(0),
1412fImax(0),
1413fSkip(0),
1414fAccepted(0),
1415fRoad(0){
1416 //--------------------------------------------------------------------
1417 //default AliITSlayer constructor
1418 //--------------------------------------------------------------------
1419 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1420 fClusterWeight[i]=0;
1421 fClusterTracks[0][i]=-1;
1422 fClusterTracks[1][i]=-1;
1423 fClusterTracks[2][i]=-1;
1424 fClusterTracks[3][i]=-1;
1425 }
1426}
1427//------------------------------------------------------------------------
1428AliITStrackerMI::AliITSlayer::
1429AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1430fR(r),
1431fPhiOffset(p),
1432fNladders(nl),
1433fZOffset(z),
1434fNdetectors(nd),
1435fDetectors(0),
1436fN(0),
1437fDy5(0),
1438fDy10(0),
1439fDy20(0),
1440fClustersCs(0),
1441fClusterIndexCs(0),
1442fYcs(0),
1443fZcs(0),
1444fNcs(0),
1445fCurrentSlice(-1),
1446fZmax(0),
1447fYmin(0),
1448fYmax(0),
1449fI(0),
1450fImax(0),
1451fSkip(0),
1452fAccepted(0),
1453fRoad(0) {
1454 //--------------------------------------------------------------------
1455 //main AliITSlayer constructor
1456 //--------------------------------------------------------------------
1457 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1458 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
1459}
1460//------------------------------------------------------------------------
1461AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1462fR(layer.fR),
1463fPhiOffset(layer.fPhiOffset),
1464fNladders(layer.fNladders),
1465fZOffset(layer.fZOffset),
1466fNdetectors(layer.fNdetectors),
1467fDetectors(layer.fDetectors),
1468fN(layer.fN),
1469fDy5(layer.fDy5),
1470fDy10(layer.fDy10),
1471fDy20(layer.fDy20),
1472fClustersCs(layer.fClustersCs),
1473fClusterIndexCs(layer.fClusterIndexCs),
1474fYcs(layer.fYcs),
1475fZcs(layer.fZcs),
1476fNcs(layer.fNcs),
1477fCurrentSlice(layer.fCurrentSlice),
1478fZmax(layer.fZmax),
1479fYmin(layer.fYmin),
1480fYmax(layer.fYmax),
1481fI(layer.fI),
1482fImax(layer.fImax),
1483fSkip(layer.fSkip),
1484fAccepted(layer.fAccepted),
1485fRoad(layer.fRoad){
1486 //Copy constructor
1487}
1488//------------------------------------------------------------------------
1489AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1490 //--------------------------------------------------------------------
1491 // AliITSlayer destructor
1492 //--------------------------------------------------------------------
1493 delete [] fDetectors;
1494 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1495 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1496 fClusterWeight[i]=0;
1497 fClusterTracks[0][i]=-1;
1498 fClusterTracks[1][i]=-1;
1499 fClusterTracks[2][i]=-1;
1500 fClusterTracks[3][i]=-1;
1501 }
1502}
1503//------------------------------------------------------------------------
1504void AliITStrackerMI::AliITSlayer::ResetClusters() {
1505 //--------------------------------------------------------------------
1506 // This function removes loaded clusters
1507 //--------------------------------------------------------------------
1508 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1509 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++){
1510 fClusterWeight[i]=0;
1511 fClusterTracks[0][i]=-1;
1512 fClusterTracks[1][i]=-1;
1513 fClusterTracks[2][i]=-1;
1514 fClusterTracks[3][i]=-1;
1515 }
1516
1517 fN=0;
1518 fI=0;
1519}
1520//------------------------------------------------------------------------
1521void AliITStrackerMI::AliITSlayer::ResetWeights() {
1522 //--------------------------------------------------------------------
1523 // This function reset weights of the clusters
1524 //--------------------------------------------------------------------
1525 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1526 fClusterWeight[i]=0;
1527 fClusterTracks[0][i]=-1;
1528 fClusterTracks[1][i]=-1;
1529 fClusterTracks[2][i]=-1;
1530 fClusterTracks[3][i]=-1;
1531 }
1532 for (Int_t i=0; i<fN;i++) {
1533 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1534 if (cl&&cl->IsUsed()) cl->Use();
1535 }
1536
1537}
1538//------------------------------------------------------------------------
1539void AliITStrackerMI::AliITSlayer::ResetRoad() {
1540 //--------------------------------------------------------------------
1541 // This function calculates the road defined by the cluster density
1542 //--------------------------------------------------------------------
1543 Int_t n=0;
1544 for (Int_t i=0; i<fN; i++) {
1545 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1546 }
1547 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
1548}
1549//------------------------------------------------------------------------
1550Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
1551 //--------------------------------------------------------------------
1552 //This function adds a cluster to this layer
1553 //--------------------------------------------------------------------
1554 if (fN==AliITSRecoParam::GetMaxClusterPerLayer()) {
1555 ::Error("InsertCluster","Too many clusters !\n");
1556 return 1;
1557 }
1558 fCurrentSlice=-1;
1559 fClusters[fN]=cl;
1560 fN++;
1561 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
1562 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1563 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1564 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1565 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
1566
1567 return 0;
1568}
1569//------------------------------------------------------------------------
1570void AliITStrackerMI::AliITSlayer::SortClusters()
1571{
1572 //
1573 //sort clusters
1574 //
1575 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1576 Float_t *z = new Float_t[fN];
1577 Int_t * index = new Int_t[fN];
1578 //
1579 for (Int_t i=0;i<fN;i++){
1580 z[i] = fClusters[i]->GetZ();
1581 }
1582 TMath::Sort(fN,z,index,kFALSE);
1583 for (Int_t i=0;i<fN;i++){
1584 clusters[i] = fClusters[index[i]];
1585 }
1586 //
1587 for (Int_t i=0;i<fN;i++){
1588 fClusters[i] = clusters[i];
1589 fZ[i] = fClusters[i]->GetZ();
1590 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1591 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1592 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1593 fY[i] = y;
1594 }
1595 delete[] index;
1596 delete[] z;
1597 delete[] clusters;
1598 //
1599
1600 fYB[0]=10000000;
1601 fYB[1]=-10000000;
1602 for (Int_t i=0;i<fN;i++){
1603 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1604 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1605 fClusterIndex[i] = i;
1606 }
1607 //
1608 // fill slices
1609 fDy5 = (fYB[1]-fYB[0])/5.;
1610 fDy10 = (fYB[1]-fYB[0])/10.;
1611 fDy20 = (fYB[1]-fYB[0])/20.;
1612 for (Int_t i=0;i<6;i++) fN5[i] =0;
1613 for (Int_t i=0;i<11;i++) fN10[i]=0;
1614 for (Int_t i=0;i<21;i++) fN20[i]=0;
1615 //
1616 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;}
1617 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;}
1618 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;}
1619 //
1620 //
1621 for (Int_t i=0;i<fN;i++)
1622 for (Int_t irot=-1;irot<=1;irot++){
1623 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1624 // slice 5
1625 for (Int_t slice=0; slice<6;slice++){
1626 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<AliITSRecoParam::GetMaxClusterPerLayer5()){
1627 fClusters5[slice][fN5[slice]] = fClusters[i];
1628 fY5[slice][fN5[slice]] = curY;
1629 fZ5[slice][fN5[slice]] = fZ[i];
1630 fClusterIndex5[slice][fN5[slice]]=i;
1631 fN5[slice]++;
1632 }
1633 }
1634 // slice 10
1635 for (Int_t slice=0; slice<11;slice++){
1636 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<AliITSRecoParam::GetMaxClusterPerLayer10()){
1637 fClusters10[slice][fN10[slice]] = fClusters[i];
1638 fY10[slice][fN10[slice]] = curY;
1639 fZ10[slice][fN10[slice]] = fZ[i];
1640 fClusterIndex10[slice][fN10[slice]]=i;
1641 fN10[slice]++;
1642 }
1643 }
1644 // slice 20
1645 for (Int_t slice=0; slice<21;slice++){
1646 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<AliITSRecoParam::GetMaxClusterPerLayer20()){
1647 fClusters20[slice][fN20[slice]] = fClusters[i];
1648 fY20[slice][fN20[slice]] = curY;
1649 fZ20[slice][fN20[slice]] = fZ[i];
1650 fClusterIndex20[slice][fN20[slice]]=i;
1651 fN20[slice]++;
1652 }
1653 }
1654 }
1655
1656 //
1657 // consistency check
1658 //
1659 for (Int_t i=0;i<fN-1;i++){
1660 if (fZ[i]>fZ[i+1]){
1661 printf("Bug\n");
1662 }
1663 }
1664 //
1665 for (Int_t slice=0;slice<21;slice++)
1666 for (Int_t i=0;i<fN20[slice]-1;i++){
1667 if (fZ20[slice][i]>fZ20[slice][i+1]){
1668 printf("Bug\n");
1669 }
1670 }
1671
1672
1673}
1674//------------------------------------------------------------------------
1675Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1676 //--------------------------------------------------------------------
1677 // This function returns the index of the nearest cluster
1678 //--------------------------------------------------------------------
1679 Int_t ncl=0;
1680 const Float_t *zcl;
1681 if (fCurrentSlice<0) {
1682 ncl = fN;
1683 zcl = fZ;
1684 }
1685 else{
1686 ncl = fNcs;
1687 zcl = fZcs;;
1688 }
1689
1690 if (ncl==0) return 0;
1691 Int_t b=0, e=ncl-1, m=(b+e)/2;
1692 for (; b<e; m=(b+e)/2) {
1693 // if (z > fClusters[m]->GetZ()) b=m+1;
1694 if (z > zcl[m]) b=m+1;
1695 else e=m;
1696 }
1697 return m;
1698}
1699//------------------------------------------------------------------------
1700Bool_t AliITStrackerMI::ComputeRoad(AliITStrackMI* track,Int_t ilayer,Int_t idet,Double_t &zmin,Double_t &zmax,Double_t &ymin,Double_t &ymax) const {
1701 //--------------------------------------------------------------------
1702 // This function computes the rectangular road for this track
1703 //--------------------------------------------------------------------
1704
1705
1706 AliITSdetector &det = fgLayers[ilayer].GetDetector(idet);
1707 // take into account the misalignment: propagate track to misaligned detector plane
1708 if (!track->Propagate(det.GetPhi(),det.GetRmisal())) return kFALSE;
1709
1710 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
1711 TMath::Sqrt(track->GetSigmaZ2() +
1712 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1713 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1714 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
1715 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
1716 TMath::Sqrt(track->GetSigmaY2() +
1717 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1718 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1719 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
1720
1721 // track at boundary between detectors, enlarge road
1722 Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidth();
1723 if ( (track->GetY()-dy < det.GetYmin()+boundaryWidth) ||
1724 (track->GetY()+dy > det.GetYmax()-boundaryWidth) ||
1725 (track->GetZ()-dz < det.GetZmin()+boundaryWidth) ||
1726 (track->GetZ()+dz > det.GetZmax()-boundaryWidth) ) {
1727 Float_t tgl = TMath::Abs(track->GetTgl());
1728 if (tgl > 1.) tgl=1.;
1729 Double_t deltaXNeighbDets=AliITSRecoParam::GetDeltaXNeighbDets();
1730 dz = TMath::Sqrt(dz*dz+deltaXNeighbDets*deltaXNeighbDets*tgl*tgl);
1731 Float_t snp = TMath::Abs(track->GetSnp());
1732 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) return kFALSE;
1733 dy = TMath::Sqrt(dy*dy+deltaXNeighbDets*deltaXNeighbDets*snp*snp);
1734 } // boundary
1735
1736 // add to the road a term (up to 2-3 mm) to deal with misalignments
1737 dy = TMath::Sqrt(dy*dy + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1738 dz = TMath::Sqrt(dz*dz + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1739
1740 Double_t r = fgLayers[ilayer].GetR();
1741 zmin = track->GetZ() - dz;
1742 zmax = track->GetZ() + dz;
1743 ymin = track->GetY() + r*det.GetPhi() - dy;
1744 ymax = track->GetY() + r*det.GetPhi() + dy;
1745
1746 // bring track back to idead detector plane
1747 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
1748
1749 return kTRUE;
1750}
1751//------------------------------------------------------------------------
1752void AliITStrackerMI::AliITSlayer::
1753SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1754 //--------------------------------------------------------------------
1755 // This function sets the "window"
1756 //--------------------------------------------------------------------
1757
1758 Double_t circle=2*TMath::Pi()*fR;
1759 fYmin = ymin; fYmax =ymax;
1760 Float_t ymiddle = (fYmin+fYmax)*0.5;
1761 if (ymiddle<fYB[0]) {
1762 fYmin+=circle; fYmax+=circle; ymiddle+=circle;
1763 } else if (ymiddle>fYB[1]) {
1764 fYmin-=circle; fYmax-=circle; ymiddle-=circle;
1765 }
1766
1767 //
1768 fCurrentSlice =-1;
1769 // defualt take all
1770 fClustersCs = fClusters;
1771 fClusterIndexCs = fClusterIndex;
1772 fYcs = fY;
1773 fZcs = fZ;
1774 fNcs = fN;
1775 //
1776 //is in 20 slice?
1777 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1778 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1779 if (slice<0) slice=0;
1780 if (slice>20) slice=20;
1781 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1782 if (isOK) {
1783 fCurrentSlice=slice;
1784 fClustersCs = fClusters20[fCurrentSlice];
1785 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1786 fYcs = fY20[fCurrentSlice];
1787 fZcs = fZ20[fCurrentSlice];
1788 fNcs = fN20[fCurrentSlice];
1789 }
1790 }
1791 //
1792 //is in 10 slice?
1793 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1794 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1795 if (slice<0) slice=0;
1796 if (slice>10) slice=10;
1797 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1798 if (isOK) {
1799 fCurrentSlice=slice;
1800 fClustersCs = fClusters10[fCurrentSlice];
1801 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1802 fYcs = fY10[fCurrentSlice];
1803 fZcs = fZ10[fCurrentSlice];
1804 fNcs = fN10[fCurrentSlice];
1805 }
1806 }
1807 //
1808 //is in 5 slice?
1809 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1810 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1811 if (slice<0) slice=0;
1812 if (slice>5) slice=5;
1813 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1814 if (isOK) {
1815 fCurrentSlice=slice;
1816 fClustersCs = fClusters5[fCurrentSlice];
1817 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1818 fYcs = fY5[fCurrentSlice];
1819 fZcs = fZ5[fCurrentSlice];
1820 fNcs = fN5[fCurrentSlice];
1821 }
1822 }
1823 //
1824 fI=FindClusterIndex(zmin); fZmax=zmax;
1825 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1826 fSkip = 0;
1827 fAccepted =0;
1828
1829 return;
1830}
1831//------------------------------------------------------------------------
1832Int_t AliITStrackerMI::AliITSlayer::
1833FindDetectorIndex(Double_t phi, Double_t z) const {
1834 //--------------------------------------------------------------------
1835 //This function finds the detector crossed by the track
1836 //--------------------------------------------------------------------
1837 Double_t dphi;
1838 if (fZOffset<0) // old geometry
1839 dphi = -(phi-fPhiOffset);
1840 else // new geometry
1841 dphi = phi-fPhiOffset;
1842
1843
1844 if (dphi < 0) dphi += 2*TMath::Pi();
1845 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1846 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1847 if (np>=fNladders) np-=fNladders;
1848 if (np<0) np+=fNladders;
1849
1850
1851 Double_t dz=fZOffset-z;
1852 Double_t nnz = dz*(fNdetectors-1)*0.5/fZOffset+0.5;
1853 Int_t nz = (nnz<0 ? -1 : (Int_t)nnz);
1854 if (nz>=fNdetectors) return -1;
1855 if (nz<0) return -1;
1856
1857 // ad hoc correction for 3rd ladder of SDD inner layer,
1858 // which is reversed (rotated by pi around local y)
1859 // this correction is OK only from AliITSv11Hybrid onwards
1860 if (GetR()>12. && GetR()<20.) { // SDD inner
1861 if(np==2) { // 3rd ladder
1862 nz = (fNdetectors-1) - nz;
1863 }
1864 }
1865 //printf("ndet %d phi %f z %f np %d nz %d\n",fNdetectors,phi,z,np,nz);
1866
1867
1868 return np*fNdetectors + nz;
1869}
1870//------------------------------------------------------------------------
1871const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci,Bool_t test)
1872{
1873 //--------------------------------------------------------------------
1874 // This function returns clusters within the "window"
1875 //--------------------------------------------------------------------
1876
1877 if (fCurrentSlice<0) {
1878 Double_t rpi2 = 2.*fR*TMath::Pi();
1879 for (Int_t i=fI; i<fImax; i++) {
1880 Double_t y = fY[i];
1881 if (fYmax<y) y -= rpi2;
1882 if (fYmin>y) y += rpi2;
1883 if (y<fYmin) continue;
1884 if (y>fYmax) continue;
1885 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1886 ci=i;
1887 if (!test) fI=i+1;
1888 return fClusters[i];
1889 }
1890 } else {
1891 for (Int_t i=fI; i<fImax; i++) {
1892 if (fYcs[i]<fYmin) continue;
1893 if (fYcs[i]>fYmax) continue;
1894 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1895 ci=fClusterIndexCs[i];
1896 if (!test) fI=i+1;
1897 return fClustersCs[i];
1898 }
1899 }
1900 return 0;
1901}
1902//------------------------------------------------------------------------
1903Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1904const {
1905 //--------------------------------------------------------------------
1906 // This function returns the layer thickness at this point (units X0)
1907 //--------------------------------------------------------------------
1908 Double_t d=0.0085;
1909 x0=AliITSRecoParam::GetX0Air();
1910 if (43<fR&&fR<45) { //SSD2
1911 Double_t dd=0.0034;
1912 d=dd;
1913 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1914 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1915 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1916 for (Int_t i=0; i<12; i++) {
1917 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1918 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1919 d+=0.0034;
1920 break;
1921 }
1922 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1923 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1924 d+=0.0034;
1925 break;
1926 }
1927 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1928 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1929 }
1930 } else
1931 if (37<fR&&fR<41) { //SSD1
1932 Double_t dd=0.0034;
1933 d=dd;
1934 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1935 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1936 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1937 for (Int_t i=0; i<11; i++) {
1938 if (TMath::Abs(z-3.9*i)<0.15) {
1939 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1940 d+=dd;
1941 break;
1942 }
1943 if (TMath::Abs(z+3.9*i)<0.15) {
1944 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1945 d+=dd;
1946 break;
1947 }
1948 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1949 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1950 }
1951 } else
1952 if (13<fR&&fR<26) { //SDD
1953 Double_t dd=0.0033;
1954 d=dd;
1955 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1956
1957 if (TMath::Abs(y-1.80)<0.55) {
1958 d+=0.016;
1959 for (Int_t j=0; j<20; j++) {
1960 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1961 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1962 }
1963 }
1964 if (TMath::Abs(y+1.80)<0.55) {
1965 d+=0.016;
1966 for (Int_t j=0; j<20; j++) {
1967 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1968 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1969 }
1970 }
1971
1972 for (Int_t i=0; i<4; i++) {
1973 if (TMath::Abs(z-7.3*i)<0.60) {
1974 d+=dd;
1975 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1976 break;
1977 }
1978 if (TMath::Abs(z+7.3*i)<0.60) {
1979 d+=dd;
1980 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1981 break;
1982 }
1983 }
1984 } else
1985 if (6<fR&&fR<8) { //SPD2
1986 Double_t dd=0.0063; x0=21.5;
1987 d=dd;
1988 if (TMath::Abs(y-3.08)>0.5) d+=dd;
1989 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
1990 } else
1991 if (3<fR&&fR<5) { //SPD1
1992 Double_t dd=0.0063; x0=21.5;
1993 d=dd;
1994 if (TMath::Abs(y+0.21)>0.6) d+=dd;
1995 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
1996 }
1997
1998 return d;
1999}
2000//------------------------------------------------------------------------
2001AliITStrackerMI::AliITSdetector::AliITSdetector(const AliITSdetector& det):
2002fR(det.fR),
2003fRmisal(det.fRmisal),
2004fPhi(det.fPhi),
2005fSinPhi(det.fSinPhi),
2006fCosPhi(det.fCosPhi),
2007fYmin(det.fYmin),
2008fYmax(det.fYmax),
2009fZmin(det.fZmin),
2010fZmax(det.fZmax),
2011fIsBad(det.fIsBad),
2012fNChips(det.fNChips),
2013fChipIsBad(det.fChipIsBad)
2014{
2015 //Copy constructor
2016}
2017//------------------------------------------------------------------------
2018void AliITStrackerMI::AliITSdetector::ReadBadDetectorAndChips(Int_t ilayer,Int_t idet,
2019 const AliITSDetTypeRec *detTypeRec)
2020{
2021 //--------------------------------------------------------------------
2022 // Read bad detectors and chips from calibration objects in AliITSDetTypeRec
2023 //--------------------------------------------------------------------
2024
2025 // In AliITSDetTypeRec, detector numbers go from 0 to 2197
2026 // while in the tracker they start from 0 for each layer
2027 for(Int_t il=0; il<ilayer; il++)
2028 idet += AliITSgeomTGeo::GetNLadders(il+1)*AliITSgeomTGeo::GetNDetectors(il+1);
2029
2030 Int_t detType;
2031 if (ilayer==0 || ilayer==1) { // ---------- SPD
2032 detType = 0;
2033 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
2034 detType = 1;
2035 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
2036 detType = 2;
2037 } else {
2038 printf("AliITStrackerMI::AliITSdetector::InitBadFromOCDB: Wrong layer number %d\n",ilayer);
2039 return;
2040 }
2041
2042 // Get calibration from AliITSDetTypeRec
2043 AliITSCalibration *calib = (AliITSCalibration*)detTypeRec->GetCalibrationModel(idet);
2044 calib->SetModuleIndex(idet);
2045 AliITSCalibration *calibSPDdead = 0;
2046 if(detType==0) calibSPDdead = (AliITSCalibration*)detTypeRec->GetSPDDeadModel(idet); // TEMPORARY
2047 if (calib->IsBad() ||
2048 (detType==0 && calibSPDdead->IsBad())) // TEMPORARY
2049 {
2050 SetBad();
2051 // printf("lay %d bad %d\n",ilayer,idet);
2052 }
2053
2054 // Get segmentation from AliITSDetTypeRec
2055 AliITSsegmentation *segm = (AliITSsegmentation*)detTypeRec->GetSegmentationModel(detType);
2056
2057 // Read info about bad chips
2058 fNChips = segm->GetMaximumChipIndex()+1;
2059 //printf("ilayer %d detType %d idet %d fNChips %d %d GetNumberOfChips %d\n",ilayer,detType,idet,fNChips,segm->GetMaximumChipIndex(),segm->GetNumberOfChips());
2060 if(fChipIsBad) { delete [] fChipIsBad; fChipIsBad=NULL; }
2061 fChipIsBad = new Bool_t[fNChips];
2062 for (Int_t iCh=0;iCh<fNChips;iCh++) {
2063 fChipIsBad[iCh] = calib->IsChipBad(iCh);
2064 if (detType==0 && calibSPDdead->IsChipBad(iCh)) fChipIsBad[iCh] = kTRUE; // TEMPORARY
2065 //if(fChipIsBad[iCh]) {printf("lay %d det %d bad chip %d\n",ilayer,idet,iCh);}
2066 }
2067
2068 return;
2069}
2070//------------------------------------------------------------------------
2071Double_t AliITStrackerMI::GetEffectiveThickness()
2072{
2073 //--------------------------------------------------------------------
2074 // Returns the thickness between the current layer and the vertex (units X0)
2075 //--------------------------------------------------------------------
2076
2077 if(fUseTGeo!=0) {
2078 if(fxOverX0Layer[0]<0) BuildMaterialLUT("Layers");
2079 if(fxOverX0Shield[0]<0) BuildMaterialLUT("Shields");
2080 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
2081 }
2082
2083 // beam pipe
2084 Double_t dPipe = (fUseTGeo==0 ? AliITSRecoParam::GetdPipe() : fxOverX0Pipe);
2085 Double_t d=dPipe*AliITSRecoParam::GetrPipe()*AliITSRecoParam::GetrPipe();
2086
2087 // layers
2088 Double_t x0=0;
2089 Double_t xn=fgLayers[fI].GetR();
2090 for (Int_t i=0; i<fI; i++) {
2091 Double_t xi=fgLayers[i].GetR();
2092 Double_t dLayer = (fUseTGeo==0 ? fgLayers[i].GetThickness(0,0,x0) : fxOverX0Layer[i]);
2093 d+=dLayer*xi*xi;
2094 }
2095
2096 // shields
2097 if (fI>1) {
2098 Double_t dshieldSPD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(0) : fxOverX0Shield[0]);
2099 d+=dshieldSPD*AliITSRecoParam::GetrInsideShield(0)*AliITSRecoParam::GetrInsideShield(0);
2100 }
2101 if (fI>3) {
2102 Double_t dshieldSDD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(1) : fxOverX0Shield[1]);
2103 d+=dshieldSDD*AliITSRecoParam::GetrInsideShield(1)*AliITSRecoParam::GetrInsideShield(1);
2104 }
2105 return d/(xn*xn);
2106}
2107//------------------------------------------------------------------------
2108Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
2109 //-------------------------------------------------------------------
2110 // This function returns number of clusters within the "window"
2111 //--------------------------------------------------------------------
2112 Int_t ncl=0;
2113 for (Int_t i=fI; i<fN; i++) {
2114 const AliITSRecPoint *c=fClusters[i];
2115 if (c->GetZ() > fZmax) break;
2116 if (c->IsUsed()) continue;
2117 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
2118 Double_t y=fR*det.GetPhi() + c->GetY();
2119
2120 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
2121 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
2122
2123 if (y<fYmin) continue;
2124 if (y>fYmax) continue;
2125 ncl++;
2126 }
2127 return ncl;
2128}
2129//------------------------------------------------------------------------
2130Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2131 const AliITStrackMI *clusters,Bool_t extra, Bool_t planeeff)
2132{
2133 //--------------------------------------------------------------------
2134 // This function refits the track "track" at the position "x" using
2135 // the clusters from "clusters"
2136 // If "extra"==kTRUE,
2137 // the clusters from overlapped modules get attached to "track"
2138 // If "planeff"==kTRUE,
2139 // special approach for plane efficiency evaluation is applyed
2140 //--------------------------------------------------------------------
2141
2142 Int_t index[AliITSgeomTGeo::kNLayers];
2143 Int_t k;
2144 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2145 Int_t nc=clusters->GetNumberOfClusters();
2146 for (k=0; k<nc; k++) {
2147 Int_t idx=clusters->GetClusterIndex(k);
2148 Int_t ilayer=(idx&0xf0000000)>>28;
2149 index[ilayer]=idx;
2150 }
2151
2152 return RefitAt(xx,track,index,extra,planeeff); // call the method below
2153}
2154//------------------------------------------------------------------------
2155Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2156 const Int_t *clusters,Bool_t extra, Bool_t planeeff)
2157{
2158 //--------------------------------------------------------------------
2159 // This function refits the track "track" at the position "x" using
2160 // the clusters from array
2161 // If "extra"==kTRUE,
2162 // the clusters from overlapped modules get attached to "track"
2163 // If "planeff"==kTRUE,
2164 // special approach for plane efficiency evaluation is applyed
2165 //--------------------------------------------------------------------
2166 Int_t index[AliITSgeomTGeo::kNLayers];
2167 Int_t k;
2168 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2169 //
2170 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
2171 index[k]=clusters[k];
2172 }
2173
2174 // special for cosmics: check which the innermost layer crossed
2175 // by the track
2176 Int_t innermostlayer=5;
2177 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
2178 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
2179 if(drphi < fgLayers[innermostlayer].GetR()) break;
2180 }
2181 //printf(" drphi %f innermost %d\n",drphi,innermostlayer);
2182
2183 Int_t modstatus=1; // found
2184 Float_t xloc,zloc;
2185 Int_t from, to, step;
2186 if (xx > track->GetX()) {
2187 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
2188 step=+1;
2189 } else {
2190 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
2191 step=-1;
2192 }
2193 TString dir = (step>0 ? "outward" : "inward");
2194
2195 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
2196 AliITSlayer &layer=fgLayers[ilayer];
2197 Double_t r=layer.GetR();
2198 if (step<0 && xx>r) break;
2199
2200 // material between SSD and SDD, SDD and SPD
2201 Double_t hI=ilayer-0.5*step;
2202 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
2203 if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
2204 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
2205 if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
2206
2207 // remember old position [SR, GSI 18.02.2003]
2208 Double_t oldX=0., oldY=0., oldZ=0.;
2209 if (track->IsStartedTimeIntegral() && step==1) {
2210 if (!track->GetGlobalXYZat(track->GetX(),oldX,oldY,oldZ)) return kFALSE;
2211 }
2212 //
2213
2214 Double_t oldGlobXYZ[3];
2215 if (!track->GetXYZ(oldGlobXYZ)) return kFALSE;
2216 //TMath::Sqrt(track->GetSigmaY2());
2217
2218 Double_t phi,z;
2219 if (!track->GetPhiZat(r,phi,z)) return kFALSE;
2220
2221 Int_t idet=layer.FindDetectorIndex(phi,z);
2222
2223 // check if we allow a prolongation without point for large-eta tracks
2224 Int_t skip = CheckSkipLayer(track,ilayer,idet);
2225 if (skip==2) {
2226 // propagate to the layer radius
2227 Double_t xToGo; if (!track->GetLocalXat(r,xToGo)) return kFALSE;
2228 if (!track->Propagate(xToGo)) return kFALSE;
2229 // apply correction for material of the current layer
2230 CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir);
2231 modstatus = 4; // out in z
2232 if(LocalModuleCoord(ilayer,idet,track,xloc,zloc)) { // local module coords
2233 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2234 }
2235 // track time update [SR, GSI 17.02.2003]
2236 if (track->IsStartedTimeIntegral() && step==1) {
2237 Double_t newX, newY, newZ;
2238 if (!track->GetGlobalXYZat(track->GetX(),newX,newY,newZ)) return kFALSE;
2239 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
2240 (oldZ-newZ)*(oldZ-newZ);
2241 track->AddTimeStep(TMath::Sqrt(dL2));
2242 }
2243 continue;
2244 }
2245
2246 if (idet<0) return kFALSE;
2247
2248 const AliITSdetector &det=layer.GetDetector(idet);
2249 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
2250
2251 track->SetDetectorIndex(idet);
2252 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2253
2254 Double_t dz,zmin,zmax,dy,ymin,ymax;
2255
2256 const AliITSRecPoint *clAcc=0;
2257 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2258
2259 Int_t idx=index[ilayer];
2260 if (idx>=0) { // cluster in this layer
2261 modstatus = 6; // no refit
2262 const AliITSRecPoint *cl=(AliITSRecPoint *)GetCluster(idx);
2263 if (cl) {
2264 if (idet != cl->GetDetectorIndex()) {
2265 idet=cl->GetDetectorIndex();
2266 const AliITSdetector &detc=layer.GetDetector(idet);
2267 if (!track->Propagate(detc.GetPhi(),detc.GetR())) return kFALSE;
2268 track->SetDetectorIndex(idet);
2269 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2270 }
2271 Int_t cllayer = (idx & 0xf0000000) >> 28;;
2272 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
2273 if (chi2<maxchi2) {
2274 clAcc=cl;
2275 maxchi2=chi2;
2276 modstatus = 1; // found
2277 } else {
2278 return kFALSE; //
2279 }
2280 }
2281 } else { // no cluster in this layer
2282 if (skip==1) {
2283 modstatus = 3; // skipped
2284 // Plane Eff determination:
2285 if (planeeff && ilayer==AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()) {
2286 if (IsOKForPlaneEff(track,clusters,ilayer)) // only adequate track for plane eff. evaluation
2287 UseTrackForPlaneEff(track,ilayer);
2288 }
2289 } else {
2290 modstatus = 5; // no cls in road
2291 // check dead
2292 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2293 dz = 0.5*(zmax-zmin);
2294 dy = 0.5*(ymax-ymin);
2295 Int_t dead = CheckDeadZone(track,ilayer,idet,dz,dy,kTRUE);
2296 if (dead==1) modstatus = 7; // holes in z in SPD
2297 if (dead==2 || dead==3) modstatus = 2; // dead from OCDB
2298 }
2299 }
2300
2301 if (clAcc) {
2302 if (!UpdateMI(track,clAcc,maxchi2,idx)) return kFALSE;
2303 track->SetSampledEdx(clAcc->GetQ(),track->GetNumberOfClusters()-1);
2304 }
2305 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2306
2307
2308 if (extra) { // search for extra clusters in overlapped modules
2309 AliITStrackV2 tmp(*track);
2310 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2311 layer.SelectClusters(zmin,zmax,ymin,ymax);
2312
2313 const AliITSRecPoint *clExtra=0; Int_t ci=-1,cci=-1;
2314 Int_t idetExtra=-1;
2315 maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2316 Double_t tolerance=0.1;
2317 while ((clExtra=layer.GetNextCluster(ci))!=0) {
2318 // only clusters in another module! (overlaps)
2319 idetExtra = clExtra->GetDetectorIndex();
2320 if (idet == idetExtra) continue;
2321
2322 const AliITSdetector &detx=layer.GetDetector(idetExtra);
2323
2324 if (!tmp.Propagate(detx.GetPhi(),detx.GetR()+clExtra->GetX())) continue;
2325 if (TMath::Abs(tmp.GetZ() - clExtra->GetZ()) > tolerance) continue;
2326 if (TMath::Abs(tmp.GetY() - clExtra->GetY()) > tolerance) continue;
2327 if (!tmp.Propagate(detx.GetPhi(),detx.GetR())) continue;
2328
2329 Double_t chi2=tmp.GetPredictedChi2(clExtra);
2330 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
2331 }
2332 if (cci>=0) {
2333 track->SetExtraCluster(ilayer,(ilayer<<28)+cci);
2334 track->SetExtraModule(ilayer,idetExtra);
2335 }
2336 } // end search for extra clusters in overlapped modules
2337
2338 // Correct for material of the current layer
2339 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)) return kFALSE;
2340
2341 // track time update [SR, GSI 17.02.2003]
2342 if (track->IsStartedTimeIntegral() && step==1) {
2343 Double_t newX, newY, newZ;
2344 if (!track->GetGlobalXYZat(track->GetX(),newX,newY,newZ)) return kFALSE;
2345 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
2346 (oldZ-newZ)*(oldZ-newZ);
2347 track->AddTimeStep(TMath::Sqrt(dL2));
2348 }
2349 //
2350
2351 } // end loop on layers
2352
2353 if (!track->PropagateTo(xx,0.,0.)) return kFALSE;
2354
2355 return kTRUE;
2356}
2357//------------------------------------------------------------------------
2358Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
2359{
2360 //
2361 // calculate normalized chi2
2362 // return NormalizedChi2(track,0);
2363 Float_t chi2 = 0;
2364 Float_t sum=0;
2365 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2366 // track->fdEdxMismatch=0;
2367 Float_t dedxmismatch =0;
2368 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2369 if (mode<100){
2370 for (Int_t i = 0;i<6;i++){
2371 if (track->GetClIndex(i)>0){
2372 Float_t cerry, cerrz;
2373 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2374 else
2375 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2376 cerry*=cerry;
2377 cerrz*=cerrz;
2378 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
2379 if (i>1 && AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(i)) {
2380 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
2381 if (ratio<0.5) {
2382 cchi2+=(0.5-ratio)*10.;
2383 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2384 dedxmismatch+=(0.5-ratio)*10.;
2385 }
2386 }
2387 if (i<2 ||i>3){
2388 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
2389 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2390 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2391 if (i<2) chi2+=2*cl->GetDeltaProbability();
2392 }
2393 chi2+=cchi2;
2394 sum++;
2395 }
2396 }
2397 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2398 track->SetdEdxMismatch(dedxmismatch);
2399 }
2400 }
2401 else{
2402 for (Int_t i = 0;i<4;i++){
2403 if (track->GetClIndex(i)>0){
2404 Float_t cerry, cerrz;
2405 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2406 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2407 cerry*=cerry;
2408 cerrz*=cerrz;
2409 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2410 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
2411 sum++;
2412 }
2413 }
2414 for (Int_t i = 4;i<6;i++){
2415 if (track->GetClIndex(i)>0){
2416 Float_t cerry, cerrz;
2417 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2418 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2419 cerry*=cerry;
2420 cerrz*=cerrz;
2421 Float_t cerryb, cerrzb;
2422 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
2423 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
2424 cerryb*=cerryb;
2425 cerrzb*=cerrzb;
2426 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2427 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
2428 sum++;
2429 }
2430 }
2431 }
2432 if (track->GetESDtrack()->GetTPCsignal()>85){
2433 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
2434 if (ratio<0.5) {
2435 chi2+=(0.5-ratio)*5.;
2436 }
2437 if (ratio>2){
2438 chi2+=(ratio-2.0)*3;
2439 }
2440 }
2441 //
2442 Double_t match = TMath::Sqrt(track->GetChi22());
2443 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2444 if (!track->GetConstrain()) {
2445 if (track->GetNumberOfClusters()>2) {
2446 match/=track->GetNumberOfClusters()-2.;
2447 } else {
2448 match=0;
2449 }
2450 }
2451 if (match<0) match=0;
2452 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2453 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2454 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2455 1./(1.+track->GetNSkipped()));
2456
2457 return normchi2;
2458}
2459//------------------------------------------------------------------------
2460Double_t AliITStrackerMI::GetMatchingChi2(const AliITStrackMI * track1,const AliITStrackMI * track2)
2461{
2462 //
2463 // return matching chi2 between two tracks
2464 Double_t largeChi2=1000.;
2465
2466 AliITStrackMI track3(*track2);
2467 if (!track3.Propagate(track1->GetAlpha(),track1->GetX())) return largeChi2;
2468 TMatrixD vec(5,1);
2469 vec(0,0)=track1->GetY() - track3.GetY();
2470 vec(1,0)=track1->GetZ() - track3.GetZ();
2471 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2472 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2473 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
2474 //
2475 TMatrixD cov(5,5);
2476 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2477 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2478 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2479 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2480 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2481
2482 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2483 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2484 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2485 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2486 //
2487 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2488 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2489 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2490 //
2491 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2492 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2493 //
2494 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2495
2496 cov.Invert();
2497 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2498 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2499 return chi2(0,0);
2500}
2501//------------------------------------------------------------------------
2502Double_t AliITStrackerMI::GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr) const
2503{
2504 //
2505 // return probability that given point (characterized by z position and error)
2506 // is in SPD dead zone
2507 //
2508 Double_t probability = 0.;
2509 Double_t absz = TMath::Abs(zpos);
2510 Double_t nearestz = (absz<2.) ? 0.5*(fSPDdetzcentre[1]+fSPDdetzcentre[2]) :
2511 0.5*(fSPDdetzcentre[2]+fSPDdetzcentre[3]);
2512 if (TMath::Abs(absz-nearestz)>0.25+3.*zerr) return probability;
2513 Double_t zmin, zmax;
2514 if (zpos<-6.) { // dead zone at z = -7
2515 zmin = fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2516 zmax = fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2517 } else if (zpos>6.) { // dead zone at z = +7
2518 zmin = fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2519 zmax = fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2520 } else if (absz<2.) { // dead zone at z = 0
2521 zmin = fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2522 zmax = fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2523 } else {
2524 zmin = 0.;
2525 zmax = 0.;
2526 }
2527 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2528 // dead zone)
2529 probability = 0.5*( TMath::Erf((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2530 TMath::Erf((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
2531 return probability;
2532}
2533//------------------------------------------------------------------------
2534Double_t AliITStrackerMI::GetTruncatedChi2(const AliITStrackMI * track, Float_t fac)
2535{
2536 //
2537 // calculate normalized chi2
2538 Float_t chi2[6];
2539 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2540 Float_t ncl = 0;
2541 for (Int_t i = 0;i<6;i++){
2542 if (TMath::Abs(track->GetDy(i))>0){
2543 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2544 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2545 ncl++;
2546 }
2547 else{chi2[i]=10000;}
2548 }
2549 Int_t index[6];
2550 TMath::Sort(6,chi2,index,kFALSE);
2551 Float_t max = float(ncl)*fac-1.;
2552 Float_t sumchi=0, sumweight=0;
2553 for (Int_t i=0;i<max+1;i++){
2554 Float_t weight = (i<max)?1.:(max+1.-i);
2555 sumchi+=weight*chi2[index[i]];
2556 sumweight+=weight;
2557 }
2558 Double_t normchi2 = sumchi/sumweight;
2559 return normchi2;
2560}
2561//------------------------------------------------------------------------
2562Double_t AliITStrackerMI::GetInterpolatedChi2(const AliITStrackMI * forwardtrack,const AliITStrackMI * backtrack)
2563{
2564 //
2565 // calculate normalized chi2
2566 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2567 Int_t npoints = 0;
2568 Double_t res =0;
2569 for (Int_t i=0;i<6;i++){
2570 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2571 Double_t sy1 = forwardtrack->GetSigmaY(i);
2572 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2573 Double_t sy2 = backtrack->GetSigmaY(i);
2574 Double_t sz2 = backtrack->GetSigmaZ(i);
2575 if (i<2){ sy2=1000.;sz2=1000;}
2576 //
2577 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2578 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2579 //
2580 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2581 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2582 //
2583 res+= nz0*nz0+ny0*ny0;
2584 npoints++;
2585 }
2586 if (npoints>1) return
2587 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
2588 //2*forwardtrack->fNUsed+
2589 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2590 1./(1.+forwardtrack->GetNSkipped()));
2591 return 1000;
2592}
2593//------------------------------------------------------------------------
2594Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2595 //--------------------------------------------------------------------
2596 // Return pointer to a given cluster
2597 //--------------------------------------------------------------------
2598 Int_t l=(index & 0xf0000000) >> 28;
2599 Int_t c=(index & 0x0fffffff) >> 00;
2600 return fgLayers[l].GetWeight(c);
2601}
2602//------------------------------------------------------------------------
2603void AliITStrackerMI::RegisterClusterTracks(const AliITStrackMI* track,Int_t id)
2604{
2605 //---------------------------------------------
2606 // register track to the list
2607 //
2608 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2609 //
2610 //
2611 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2612 Int_t index = track->GetClusterIndex(icluster);
2613 Int_t l=(index & 0xf0000000) >> 28;
2614 Int_t c=(index & 0x0fffffff) >> 00;
2615 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2616 for (Int_t itrack=0;itrack<4;itrack++){
2617 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2618 fgLayers[l].SetClusterTracks(itrack,c,id);
2619 break;
2620 }
2621 }
2622 }
2623}
2624//------------------------------------------------------------------------
2625void AliITStrackerMI::UnRegisterClusterTracks(const AliITStrackMI* track, Int_t id)
2626{
2627 //---------------------------------------------
2628 // unregister track from the list
2629 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2630 Int_t index = track->GetClusterIndex(icluster);
2631 Int_t l=(index & 0xf0000000) >> 28;
2632 Int_t c=(index & 0x0fffffff) >> 00;
2633 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2634 for (Int_t itrack=0;itrack<4;itrack++){
2635 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2636 fgLayers[l].SetClusterTracks(itrack,c,-1);
2637 }
2638 }
2639 }
2640}
2641//------------------------------------------------------------------------
2642Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2643{
2644 //-------------------------------------------------------------
2645 //get number of shared clusters
2646 //-------------------------------------------------------------
2647 Float_t shared=0;
2648 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2649 // mean number of clusters
2650 Float_t *ny = GetNy(id), *nz = GetNz(id);
2651
2652
2653 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2654 Int_t index = track->GetClusterIndex(icluster);
2655 Int_t l=(index & 0xf0000000) >> 28;
2656 Int_t c=(index & 0x0fffffff) >> 00;
2657 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2658 if (ny[l]==0){
2659 printf("problem\n");
2660 }
2661 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2662 Float_t weight=1;
2663 //
2664 Float_t deltan = 0;
2665 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2666 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2667 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2668 if (l<2 || l>3){
2669 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2670 }
2671 else{
2672 deltan = (cl->GetNz()-nz[l]);
2673 }
2674 if (deltan>2.0) continue; // extended - highly probable shared cluster
2675 weight = 2./TMath::Max(3.+deltan,2.);
2676 //
2677 for (Int_t itrack=0;itrack<4;itrack++){
2678 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2679 list[l]=index;
2680 clist[l] = (AliITSRecPoint*)GetCluster(index);
2681 shared+=weight;
2682 break;
2683 }
2684 }
2685 }
2686 track->SetNUsed(shared);
2687 return shared;
2688}
2689//------------------------------------------------------------------------
2690Int_t AliITStrackerMI::GetOverlapTrack(const AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2691{
2692 //
2693 // find first shared track
2694 //
2695 // mean number of clusters
2696 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2697 //
2698 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2699 Int_t sharedtrack=100000;
2700 Int_t tracks[24],trackindex=0;
2701 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2702 //
2703 for (Int_t icluster=0;icluster<6;icluster++){
2704 if (clusterlist[icluster]<0) continue;
2705 Int_t index = clusterlist[icluster];
2706 Int_t l=(index & 0xf0000000) >> 28;
2707 Int_t c=(index & 0x0fffffff) >> 00;
2708 if (ny[l]==0){
2709 printf("problem\n");
2710 }
2711 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2712 //if (l>3) continue;
2713 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2714 //
2715 Float_t deltan = 0;
2716 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2717 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2718 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2719 if (l<2 || l>3){
2720 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2721 }
2722 else{
2723 deltan = (cl->GetNz()-nz[l]);
2724 }
2725 if (deltan>2.0) continue; // extended - highly probable shared cluster
2726 //
2727 for (Int_t itrack=3;itrack>=0;itrack--){
2728 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2729 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2730 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2731 trackindex++;
2732 }
2733 }
2734 }
2735 if (trackindex==0) return -1;
2736 if (trackindex==1){
2737 sharedtrack = tracks[0];
2738 }else{
2739 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2740 else{
2741 //
2742 Int_t tracks2[24], cluster[24];
2743 for (Int_t i=0;i<trackindex;i++){ tracks2[i]=-1; cluster[i]=0;}
2744 Int_t index =0;
2745 //
2746 for (Int_t i=0;i<trackindex;i++){
2747 if (tracks[i]<0) continue;
2748 tracks2[index] = tracks[i];
2749 cluster[index]++;
2750 for (Int_t j=i+1;j<trackindex;j++){
2751 if (tracks[j]<0) continue;
2752 if (tracks[j]==tracks[i]){
2753 cluster[index]++;
2754 tracks[j]=-1;
2755 }
2756 }
2757 index++;
2758 }
2759 Int_t max=0;
2760 for (Int_t i=0;i<index;i++){
2761 if (cluster[index]>max) {
2762 sharedtrack=tracks2[index];
2763 max=cluster[index];
2764 }
2765 }
2766 }
2767 }
2768
2769 if (sharedtrack>=100000) return -1;
2770 //
2771 // make list of overlaps
2772 shared =0;
2773 for (Int_t icluster=0;icluster<6;icluster++){
2774 if (clusterlist[icluster]<0) continue;
2775 Int_t index = clusterlist[icluster];
2776 Int_t l=(index & 0xf0000000) >> 28;
2777 Int_t c=(index & 0x0fffffff) >> 00;
2778 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2779 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2780 if (l==0 || l==1){
2781 if (cl->GetNy()>2) continue;
2782 if (cl->GetNz()>2) continue;
2783 }
2784 if (l==4 || l==5){
2785 if (cl->GetNy()>3) continue;
2786 if (cl->GetNz()>3) continue;
2787 }
2788 //
2789 for (Int_t itrack=3;itrack>=0;itrack--){
2790 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2791 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
2792 overlist[l]=index;
2793 shared++;
2794 }
2795 }
2796 }
2797 return sharedtrack;
2798}
2799//------------------------------------------------------------------------
2800AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2801 //
2802 // try to find track hypothesys without conflicts
2803 // with minimal chi2;
2804 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2805 Int_t entries1 = arr1->GetEntriesFast();
2806 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2807 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2808 Int_t entries2 = arr2->GetEntriesFast();
2809 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2810 //
2811 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2812 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2813 if (track10->Pt()>0.5+track20->Pt()) return track10;
2814
2815 for (Int_t itrack=0;itrack<entries1;itrack++){
2816 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2817 UnRegisterClusterTracks(track,trackID1);
2818 }
2819 //
2820 for (Int_t itrack=0;itrack<entries2;itrack++){
2821 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2822 UnRegisterClusterTracks(track,trackID2);
2823 }
2824 Int_t index1=0;
2825 Int_t index2=0;
2826 Float_t maxconflicts=6;
2827 Double_t maxchi2 =1000.;
2828 //
2829 // get weight of hypothesys - using best hypothesy
2830 Double_t w1,w2;
2831
2832 Int_t list1[6],list2[6];
2833 AliITSRecPoint *clist1[6], *clist2[6] ;
2834 RegisterClusterTracks(track10,trackID1);
2835 RegisterClusterTracks(track20,trackID2);
2836 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2837 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2838 UnRegisterClusterTracks(track10,trackID1);
2839 UnRegisterClusterTracks(track20,trackID2);
2840 //
2841 // normalized chi2
2842 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2843 Float_t nerry[6],nerrz[6];
2844 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2845 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2846 for (Int_t i=0;i<6;i++){
2847 if ( (erry1[i]>0) && (erry2[i]>0)) {
2848 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2849 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2850 }else{
2851 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2852 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2853 }
2854 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2855 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2856 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
2857 ncl1++;
2858 }
2859 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2860 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2861 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
2862 ncl2++;
2863 }
2864 }
2865 chi21/=ncl1;
2866 chi22/=ncl2;
2867 //
2868 //
2869 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2870 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
2871 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2872 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2873 //
2874 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2875 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2876 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
2877 );
2878 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2879 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2880 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
2881 );
2882
2883 Double_t sumw = w1+w2;
2884 w1/=sumw;
2885 w2/=sumw;
2886 if (w1<w2*0.5) {
2887 w1 = (d2+0.5)/(d1+d2+1.);
2888 w2 = (d1+0.5)/(d1+d2+1.);
2889 }
2890 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2891 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2892 //
2893 // get pair of "best" hypothesys
2894 //
2895 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2896 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2897
2898 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
2899 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
2900 //if (track1->fFakeRatio>0) continue;
2901 RegisterClusterTracks(track1,trackID1);
2902 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
2903 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
2904
2905 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2906 //if (track2->fFakeRatio>0) continue;
2907 Float_t nskipped=0;
2908 RegisterClusterTracks(track2,trackID2);
2909 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2910 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2911 UnRegisterClusterTracks(track2,trackID2);
2912 //
2913 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2914 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
2915 if (nskipped>0.5) continue;
2916 //
2917 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2918 if (conflict1+1<cconflict1) continue;
2919 if (conflict2+1<cconflict2) continue;
2920 Float_t conflict=0;
2921 Float_t sumchi2=0;
2922 Float_t sum=0;
2923 for (Int_t i=0;i<6;i++){
2924 //
2925 Float_t c1 =0.; // conflict coeficients
2926 Float_t c2 =0.;
2927 if (clist1[i]&&clist2[i]){
2928 Float_t deltan = 0;
2929 if (i<2 || i>3){
2930 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2931 }
2932 else{
2933 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2934 }
2935 c1 = 2./TMath::Max(3.+deltan,2.);
2936 c2 = 2./TMath::Max(3.+deltan,2.);
2937 }
2938 else{
2939 if (clist1[i]){
2940 Float_t deltan = 0;
2941 if (i<2 || i>3){
2942 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2943 }
2944 else{
2945 deltan = (clist1[i]->GetNz()-nz1[i]);
2946 }
2947 c1 = 2./TMath::Max(3.+deltan,2.);
2948 c2 = 0;
2949 }
2950
2951 if (clist2[i]){
2952 Float_t deltan = 0;
2953 if (i<2 || i>3){
2954 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2955 }
2956 else{
2957 deltan = (clist2[i]->GetNz()-nz2[i]);
2958 }
2959 c2 = 2./TMath::Max(3.+deltan,2.);
2960 c1 = 0;
2961 }
2962 }
2963 //
2964 chi21=0;chi22=0;
2965 if (TMath::Abs(track1->GetDy(i))>0.) {
2966 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2967 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
2968 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2969 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
2970 }else{
2971 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
2972 }
2973 //
2974 if (TMath::Abs(track2->GetDy(i))>0.) {
2975 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2976 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
2977 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2978 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2979 }
2980 else{
2981 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
2982 }
2983 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2984 if (chi21>0) sum+=w1;
2985 if (chi22>0) sum+=w2;
2986 conflict+=(c1+c2);
2987 }
2988 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2989 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
2990 Double_t normchi2 = 2*conflict+sumchi2/sum;
2991 if ( normchi2 <maxchi2 ){
2992 index1 = itrack1;
2993 index2 = itrack2;
2994 maxconflicts = conflict;
2995 maxchi2 = normchi2;
2996 }
2997 }
2998 UnRegisterClusterTracks(track1,trackID1);
2999 }
3000 //
3001 // if (maxconflicts<4 && maxchi2<th0){
3002 if (maxchi2<th0*2.){
3003 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
3004 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
3005 track1->SetChi2MIP(5,maxconflicts);
3006 track1->SetChi2MIP(6,maxchi2);
3007 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
3008 // track1->UpdateESDtrack(AliESDtrack::kITSin);
3009 track1->SetChi2MIP(8,index1);
3010 fBestTrackIndex[trackID1] =index1;
3011 UpdateESDtrack(track1, AliESDtrack::kITSin);
3012 }
3013 else if (track10->GetChi2MIP(0)<th1){
3014 track10->SetChi2MIP(5,maxconflicts);
3015 track10->SetChi2MIP(6,maxchi2);
3016 // track10->UpdateESDtrack(AliESDtrack::kITSin);
3017 UpdateESDtrack(track10,AliESDtrack::kITSin);
3018 }
3019
3020 for (Int_t itrack=0;itrack<entries1;itrack++){
3021 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
3022 UnRegisterClusterTracks(track,trackID1);
3023 }
3024 //
3025 for (Int_t itrack=0;itrack<entries2;itrack++){
3026 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
3027 UnRegisterClusterTracks(track,trackID2);
3028 }
3029
3030 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3031 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3032 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3033 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3034 RegisterClusterTracks(track10,trackID1);
3035 }
3036 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3037 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3038 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3039 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3040 RegisterClusterTracks(track20,trackID2);
3041 }
3042 return track10;
3043
3044}
3045//------------------------------------------------------------------------
3046void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
3047 //--------------------------------------------------------------------
3048 // This function marks clusters assigned to the track
3049 //--------------------------------------------------------------------
3050 AliTracker::UseClusters(t,from);
3051
3052 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
3053 //if (c->GetQ()>2) c->Use();
3054 if (c->GetSigmaZ2()>0.1) c->Use();
3055 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
3056 //if (c->GetQ()>2) c->Use();
3057 if (c->GetSigmaZ2()>0.1) c->Use();
3058
3059}
3060//------------------------------------------------------------------------
3061void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
3062{
3063 //------------------------------------------------------------------
3064 // add track to the list of hypothesys
3065 //------------------------------------------------------------------
3066
3067 if (esdindex>=fTrackHypothesys.GetEntriesFast())
3068 fTrackHypothesys.Expand(TMath::Max(fTrackHypothesys.GetSize(),esdindex*2+10));
3069 //
3070 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3071 if (!array) {
3072 array = new TObjArray(10);
3073 fTrackHypothesys.AddAt(array,esdindex);
3074 }
3075 array->AddLast(track);
3076}
3077//------------------------------------------------------------------------
3078void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
3079{
3080 //-------------------------------------------------------------------
3081 // compress array of track hypothesys
3082 // keep only maxsize best hypothesys
3083 //-------------------------------------------------------------------
3084 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
3085 if (! (fTrackHypothesys.At(esdindex)) ) return;
3086 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3087 Int_t entries = array->GetEntriesFast();
3088 //
3089 //- find preliminary besttrack as a reference
3090 Float_t minchi2=10000;
3091 Int_t maxn=0;
3092 AliITStrackMI * besttrack=0;
3093 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
3094 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3095 if (!track) continue;
3096 Float_t chi2 = NormalizedChi2(track,0);
3097 //
3098 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
3099 track->SetLabel(tpcLabel);
3100 CookdEdx(track);
3101 track->SetFakeRatio(1.);
3102 CookLabel(track,0.); //For comparison only
3103 //
3104 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
3105 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3106 if (track->GetNumberOfClusters()<maxn) continue;
3107 maxn = track->GetNumberOfClusters();
3108 if (chi2<minchi2){
3109 minchi2=chi2;
3110 besttrack=track;
3111 }
3112 }
3113 else{
3114 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3115 delete array->RemoveAt(itrack);
3116 }
3117 }
3118 }
3119 if (!besttrack) return;
3120 //
3121 //
3122 //take errors of best track as a reference
3123 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
3124 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3125 for (Int_t j=0;j<6;j++) {
3126 if (besttrack->GetClIndex(j)>0){
3127 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3128 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3129 ny[j] = besttrack->GetNy(j);
3130 nz[j] = besttrack->GetNz(j);
3131 }
3132 }
3133 //
3134 // calculate normalized chi2
3135 //
3136 Float_t * chi2 = new Float_t[entries];
3137 Int_t * index = new Int_t[entries];
3138 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3139 for (Int_t itrack=0;itrack<entries;itrack++){
3140 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3141 if (track){
3142 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
3143 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3144 chi2[itrack] = track->GetChi2MIP(0);
3145 else{
3146 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3147 delete array->RemoveAt(itrack);
3148 }
3149 }
3150 }
3151 }
3152 //
3153 TMath::Sort(entries,chi2,index,kFALSE);
3154 besttrack = (AliITStrackMI*)array->At(index[0]);
3155 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3156 for (Int_t j=0;j<6;j++){
3157 if (besttrack->GetClIndex(j)>0){
3158 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3159 errz[j] = besttrack->GetSigmaZ(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3160 ny[j] = besttrack->GetNy(j);
3161 nz[j] = besttrack->GetNz(j);
3162 }
3163 }
3164 }
3165 //
3166 // calculate one more time with updated normalized errors
3167 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3168 for (Int_t itrack=0;itrack<entries;itrack++){
3169 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3170 if (track){
3171 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3172 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3173 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
3174 else
3175 {
3176 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3177 delete array->RemoveAt(itrack);
3178 }
3179 }
3180 }
3181 }
3182 entries = array->GetEntriesFast();
3183 //
3184 //
3185 if (entries>0){
3186 TObjArray * newarray = new TObjArray();
3187 TMath::Sort(entries,chi2,index,kFALSE);
3188 besttrack = (AliITStrackMI*)array->At(index[0]);
3189 if (besttrack){
3190 //
3191 for (Int_t j=0;j<6;j++){
3192 if (besttrack->GetNz(j)>0&&besttrack->GetNy(j)>0){
3193 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3194 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3195 ny[j] = besttrack->GetNy(j);
3196 nz[j] = besttrack->GetNz(j);
3197 }
3198 }
3199 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
3200 minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
3201 Float_t minn = besttrack->GetNumberOfClusters()-3;
3202 Int_t accepted=0;
3203 for (Int_t i=0;i<entries;i++){
3204 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
3205 if (!track) continue;
3206 if (accepted>maxcut) break;
3207 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3208 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3209 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
3210 delete array->RemoveAt(index[i]);
3211 continue;
3212 }
3213 }
3214 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
3215 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
3216 if (!shortbest) accepted++;
3217 //
3218 newarray->AddLast(array->RemoveAt(index[i]));
3219 for (Int_t j=0;j<6;j++){
3220 if (nz[j]==0){
3221 erry[j] = track->GetSigmaY(j); erry[j+6] = track->GetSigmaY(j+6);
3222 errz[j] = track->GetSigmaZ(j); errz[j] = track->GetSigmaZ(j+6);
3223 ny[j] = track->GetNy(j);
3224 nz[j] = track->GetNz(j);
3225 }
3226 }
3227 }
3228 else{
3229 delete array->RemoveAt(index[i]);
3230 }
3231 }
3232 array->Delete();
3233 delete fTrackHypothesys.RemoveAt(esdindex);
3234 fTrackHypothesys.AddAt(newarray,esdindex);
3235 }
3236 else{
3237 array->Delete();
3238 delete fTrackHypothesys.RemoveAt(esdindex);
3239 }
3240 }
3241 delete [] chi2;
3242 delete [] index;
3243}
3244//------------------------------------------------------------------------
3245AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
3246{
3247 //-------------------------------------------------------------
3248 // try to find best hypothesy
3249 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
3250 //-------------------------------------------------------------
3251 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
3252 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3253 if (!array) return 0;
3254 Int_t entries = array->GetEntriesFast();
3255 if (!entries) return 0;
3256 Float_t minchi2 = 100000;
3257 AliITStrackMI * besttrack=0;
3258 //
3259 AliITStrackMI * backtrack = new AliITStrackMI(*original);
3260 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
3261 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
3262 Double_t ersVtx[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
3263 //
3264 for (Int_t i=0;i<entries;i++){
3265 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3266 if (!track) continue;
3267 Float_t sigmarfi,sigmaz;
3268 GetDCASigma(track,sigmarfi,sigmaz);
3269 track->SetDnorm(0,sigmarfi);
3270 track->SetDnorm(1,sigmaz);
3271 //
3272 track->SetChi2MIP(1,1000000);
3273 track->SetChi2MIP(2,1000000);
3274 track->SetChi2MIP(3,1000000);
3275 //
3276 // backtrack
3277 backtrack = new(backtrack) AliITStrackMI(*track);
3278 if (track->GetConstrain()) {
3279 if (!CorrectForPipeMaterial(backtrack,"inward")) continue;
3280 if (!backtrack->Improve(0,xyzVtx,ersVtx)) continue;
3281 backtrack->ResetCovariance(10.);
3282 }else{
3283 backtrack->ResetCovariance(10.);
3284 }
3285 backtrack->ResetClusters();
3286
3287 Double_t x = original->GetX();
3288 if (!RefitAt(x,backtrack,track)) continue;
3289 //
3290 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
3291 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
3292 if (track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)*6.) continue;
3293 track->SetChi22(GetMatchingChi2(backtrack,original));
3294
3295 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
3296 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
3297 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
3298
3299
3300 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)) continue;
3301 //
3302 //forward track - without constraint
3303 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
3304 forwardtrack->ResetClusters();
3305 x = track->GetX();
3306 RefitAt(x,forwardtrack,track);
3307 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
3308 if (track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)*6.0) continue;
3309 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)) continue;
3310
3311 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
3312 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3313 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
3314 forwardtrack->SetD(0,track->GetD(0));
3315 forwardtrack->SetD(1,track->GetD(1));
3316 {
3317 Int_t list[6];
3318 AliITSRecPoint* clist[6];
3319 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
3320 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
3321 }
3322
3323 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
3324 if ( (track->GetChi2MIP(3)>6.*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) continue;
3325 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) {
3326 track->SetChi2MIP(3,1000);
3327 continue;
3328 }
3329 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
3330 //
3331 for (Int_t ichi=0;ichi<5;ichi++){
3332 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
3333 }
3334 if (chi2 < minchi2){
3335 //besttrack = new AliITStrackMI(*forwardtrack);
3336 besttrack = track;
3337 besttrack->SetLabel(track->GetLabel());
3338 besttrack->SetFakeRatio(track->GetFakeRatio());
3339 minchi2 = chi2;
3340 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
3341 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3342 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
3343 }
3344 }
3345 delete backtrack;
3346 delete forwardtrack;
3347 Int_t accepted=0;
3348 for (Int_t i=0;i<entries;i++){
3349 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3350
3351 if (!track) continue;
3352
3353 if (accepted>checkmax || track->GetChi2MIP(3)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)*6. ||
3354 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
3355 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
3356 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3357 delete array->RemoveAt(i);
3358 continue;
3359 }
3360 }
3361 else{
3362 accepted++;
3363 }
3364 }
3365 //
3366 array->Compress();
3367 SortTrackHypothesys(esdindex,checkmax,1);
3368
3369 array = (TObjArray*) fTrackHypothesys.At(esdindex);
3370 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
3371 besttrack = (AliITStrackMI*)array->At(0);
3372 if (!besttrack) return 0;
3373 besttrack->SetChi2MIP(8,0);
3374 fBestTrackIndex[esdindex]=0;
3375 entries = array->GetEntriesFast();
3376 AliITStrackMI *longtrack =0;
3377 minchi2 =1000;
3378 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
3379 for (Int_t itrack=entries-1;itrack>0;itrack--) {
3380 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3381 if (!track->GetConstrain()) continue;
3382 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3383 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
3384 if (track->GetChi2MIP(0)>4.) continue;
3385 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
3386 longtrack =track;
3387 }
3388 //if (longtrack) besttrack=longtrack;
3389
3390 Int_t list[6];
3391 AliITSRecPoint * clist[6];
3392 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3393 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&besttrack->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3394 &&besttrack->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&besttrack->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3395 RegisterClusterTracks(besttrack,esdindex);
3396 }
3397 //
3398 //
3399 if (shared>0.0){
3400 Int_t nshared;
3401 Int_t overlist[6];
3402 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
3403 if (sharedtrack>=0){
3404 //
3405 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
3406 if (besttrack){
3407 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3408 }
3409 else return 0;
3410 }
3411 }
3412
3413 if (shared>2.5) return 0;
3414 if (shared>1.0) return besttrack;
3415 //
3416 // Don't sign clusters if not gold track
3417 //
3418 if (!besttrack->IsGoldPrimary()) return besttrack;
3419 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
3420 //
3421 if (fConstraint[fPass]){
3422 //
3423 // sign clusters
3424 //
3425 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3426 for (Int_t i=0;i<6;i++){
3427 Int_t index = besttrack->GetClIndex(i);
3428 if (index<=0) continue;
3429 Int_t ilayer = (index & 0xf0000000) >> 28;
3430 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
3431 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
3432 if (!c) continue;
3433 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3434 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3435 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
3436 if ( ilayer>2&& AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(ilayer))
3437 if (besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
3438 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3439
3440 Bool_t cansign = kTRUE;
3441 for (Int_t itrack=0;itrack<entries; itrack++){
3442 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3443 if (!track) continue;
3444 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3445 if ( (track->GetClIndex(ilayer)>0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
3446 cansign = kFALSE;
3447 break;
3448 }
3449 }
3450 if (cansign){
3451 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3452 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
3453 if (!c->IsUsed()) c->Use();
3454 }
3455 }
3456 }
3457 return besttrack;
3458}
3459//------------------------------------------------------------------------
3460void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3461{
3462 //
3463 // get "best" hypothesys
3464 //
3465
3466 Int_t nentries = itsTracks.GetEntriesFast();
3467 for (Int_t i=0;i<nentries;i++){
3468 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3469 if (!track) continue;
3470 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3471 if (!array) continue;
3472 if (array->GetEntriesFast()<=0) continue;
3473 //
3474 AliITStrackMI* longtrack=0;
3475 Float_t minn=0;
3476 Float_t maxchi2=1000;
3477 for (Int_t j=0;j<array->GetEntriesFast();j++){
3478 AliITStrackMI* trackHyp = (AliITStrackMI*)array->At(j);
3479 if (!trackHyp) continue;
3480 if (trackHyp->GetGoldV0()) {
3481 longtrack = trackHyp; //gold V0 track taken
3482 break;
3483 }
3484 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()<minn) continue;
3485 Float_t chi2 = trackHyp->GetChi2MIP(0);
3486 if (fAfterV0){
3487 if (!trackHyp->GetGoldV0()&&trackHyp->GetConstrain()==kFALSE) chi2+=5;
3488 }
3489 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()>minn) maxchi2 = trackHyp->GetChi2MIP(0);
3490 //
3491 if (chi2 > maxchi2) continue;
3492 minn= trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone();
3493 maxchi2 = chi2;
3494 longtrack=trackHyp;
3495 }
3496 //
3497 //
3498 //
3499 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3500 if (!longtrack) {longtrack = besttrack;}
3501 else besttrack= longtrack;
3502 //
3503 if (besttrack) {
3504 Int_t list[6];
3505 AliITSRecPoint * clist[6];
3506 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3507 //
3508 track->SetNUsed(shared);
3509 track->SetNSkipped(besttrack->GetNSkipped());
3510 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3511 if (shared>0) {
3512 if(!AliITSReconstructor::GetRecoParam()->GetAllowSharedClusters()) continue;
3513 Int_t nshared;
3514 Int_t overlist[6];
3515 //
3516 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3517 //if (sharedtrack==-1) sharedtrack=0;
3518 if (sharedtrack>=0) {
3519 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3520 }
3521 }
3522 if (besttrack&&fAfterV0) {
3523 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3524 }
3525 if (besttrack&&fConstraint[fPass])
3526 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3527 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5 && fConstraint[fPass]) {
3528 if ( TMath::Abs(besttrack->GetD(0))>0.1 ||
3529 TMath::Abs(besttrack->GetD(1))>0.1 ) track->SetReconstructed(kFALSE);
3530 }
3531
3532 }
3533 }
3534}
3535//------------------------------------------------------------------------
3536void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3537 //--------------------------------------------------------------------
3538 //This function "cooks" a track label. If label<0, this track is fake.
3539 //--------------------------------------------------------------------
3540 Int_t tpcLabel=-1;
3541
3542 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3543
3544 track->SetChi2MIP(9,0);
3545 Int_t nwrong=0;
3546 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3547 Int_t cindex = track->GetClusterIndex(i);
3548 Int_t l=(cindex & 0xf0000000) >> 28;
3549 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3550 Int_t isWrong=1;
3551 for (Int_t ind=0;ind<3;ind++){
3552 if (tpcLabel>0)
3553 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3554 AliDebug(2,Form("icl %d ilab %d lab %d",i,ind,cl->GetLabel(ind)));
3555 }
3556 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3557 nwrong+=isWrong;
3558 }
3559 Int_t nclusters = track->GetNumberOfClusters();
3560 if (nclusters > 0) //PH Some tracks don't have any cluster
3561 track->SetFakeRatio(double(nwrong)/double(nclusters));
3562 if (tpcLabel>0){
3563 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
3564 else
3565 track->SetLabel(tpcLabel);
3566 }
3567 AliDebug(2,Form(" nls %d wrong %d label %d tpcLabel %d\n",nclusters,nwrong,track->GetLabel(),tpcLabel));
3568
3569}
3570//------------------------------------------------------------------------
3571void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
3572{
3573 //
3574 //
3575 // Int_t list[6];
3576 //AliITSRecPoint * clist[6];
3577 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3578 Float_t dedx[4];
3579 Int_t accepted=0;
3580 track->SetChi2MIP(9,0);
3581 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3582 Int_t cindex = track->GetClusterIndex(i);
3583 Int_t l=(cindex & 0xf0000000) >> 28;
3584 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3585 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3586 Int_t isWrong=1;
3587 for (Int_t ind=0;ind<3;ind++){
3588 if (cl->GetLabel(ind)==lab) isWrong=0;
3589 }
3590 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3591 if (l<2) continue;
3592 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3593 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3594 //if (l<4&& !(cl->GetType()==1)) continue;
3595 dedx[accepted]= track->GetSampledEdx(i);
3596 //dedx[accepted]= track->fNormQ[l];
3597 accepted++;
3598 }
3599 if (accepted<1) {
3600 track->SetdEdx(0);
3601 return;
3602 }
3603 Int_t indexes[4];
3604 TMath::Sort(accepted,dedx,indexes,kFALSE);
3605 Double_t low=0.;
3606 Double_t up=0.51;
3607 Double_t nl=low*accepted, nu =up*accepted;
3608 Float_t sumamp = 0;
3609 Float_t sumweight =0;
3610 for (Int_t i=0; i<accepted; i++) {
3611 Float_t weight =1;
3612 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3613 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3614 sumamp+= dedx[indexes[i]]*weight;
3615 sumweight+=weight;
3616 }
3617 track->SetdEdx(sumamp/sumweight);
3618}
3619//------------------------------------------------------------------------
3620void AliITStrackerMI::MakeCoefficients(Int_t ntracks){
3621 //
3622 // Create some arrays
3623 //
3624 if (fCoefficients) delete []fCoefficients;
3625 fCoefficients = new Float_t[ntracks*48];
3626 for (Int_t i=0;i<ntracks*48;i++) fCoefficients[i]=-1.;
3627}
3628//------------------------------------------------------------------------
3629Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3630{
3631 //
3632 // Compute predicted chi2
3633 //
3634 Float_t erry,errz;
3635 Float_t theta = track->GetTgl();
3636 Float_t phi = track->GetSnp();
3637 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
3638 AliITSClusterParam::GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
3639 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()));
3640 // Take into account the mis-alignment (bring track to cluster plane)
3641 Double_t xTrOrig=track->GetX();
3642 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
3643 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()));
3644 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3645 // Bring the track back to detector plane in ideal geometry
3646 // [mis-alignment will be accounted for in UpdateMI()]
3647 if (!track->Propagate(xTrOrig)) return 1000.;
3648 Float_t ny,nz;
3649 AliITSClusterParam::GetNTeor(layer,cluster,theta,phi,ny,nz);
3650 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3651 if (delta>1){
3652 chi2+=0.5*TMath::Min(delta/2,2.);
3653 chi2+=2.*cluster->GetDeltaProbability();
3654 }
3655 //
3656 track->SetNy(layer,ny);
3657 track->SetNz(layer,nz);
3658 track->SetSigmaY(layer,erry);
3659 track->SetSigmaZ(layer, errz);
3660 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3661 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
3662 return chi2;
3663
3664}
3665//------------------------------------------------------------------------
3666Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3667{
3668 //
3669 // Update ITS track
3670 //
3671 Int_t layer = (index & 0xf0000000) >> 28;
3672 track->SetClIndex(layer, index);
3673 if (layer>1&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(layer)) {
3674 if (track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3675 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3676 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3677 }
3678 }
3679
3680 if (cl->GetQ()<=0) return 0; // ingore the "virtual" clusters
3681
3682
3683 // Take into account the mis-alignment (bring track to cluster plane)
3684 Double_t xTrOrig=track->GetX();
3685 Float_t clxyz[3]; cl->GetGlobalXYZ(clxyz);Double_t trxyz[3]; track->GetXYZ(trxyz);
3686 AliDebug(2,Form("gtr %f %f %f",trxyz[0],trxyz[1],trxyz[2]));
3687 AliDebug(2,Form("gcl %f %f %f",clxyz[0],clxyz[1],clxyz[2]));
3688 AliDebug(2,Form(" xtr %f xcl %f",track->GetX(),cl->GetX()));
3689
3690 if (!track->Propagate(xTrOrig+cl->GetX())) return 0;
3691
3692
3693 AliCluster c(*cl);
3694 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
3695 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
3696
3697
3698 Int_t updated = track->UpdateMI(&c,chi2,index);
3699
3700 // Bring the track back to detector plane in ideal geometry
3701 if (!track->Propagate(xTrOrig)) return 0;
3702
3703 if(!updated) AliDebug(2,"update failed");
3704 return updated;
3705}
3706
3707//------------------------------------------------------------------------
3708void AliITStrackerMI::GetDCASigma(const AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3709{
3710 //
3711 //DCA sigmas parameterization
3712 //to be paramterized using external parameters in future
3713 //
3714 //
3715 sigmarfi = 0.0040+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3716 sigmaz = 0.0110+4.37*TMath::Abs(track->GetC());
3717}
3718//------------------------------------------------------------------------
3719void AliITStrackerMI::SignDeltas(const TObjArray *clusterArray, Float_t vz)
3720{
3721 //
3722 // Clusters from delta electrons?
3723 //
3724 Int_t entries = clusterArray->GetEntriesFast();
3725 if (entries<4) return;
3726 AliITSRecPoint* cluster = (AliITSRecPoint*)clusterArray->At(0);
3727 Int_t layer = cluster->GetLayer();
3728 if (layer>1) return;
3729 Int_t index[10000];
3730 Int_t ncandidates=0;
3731 Float_t r = (layer>0)? 7:4;
3732 //
3733 for (Int_t i=0;i<entries;i++){
3734 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(i);
3735 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3736 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3737 index[ncandidates] = i; //candidate to belong to delta electron track
3738 ncandidates++;
3739 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3740 cl0->SetDeltaProbability(1);
3741 }
3742 }
3743 //
3744 //
3745 //
3746 for (Int_t i=0;i<ncandidates;i++){
3747 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(index[i]);
3748 if (cl0->GetDeltaProbability()>0.8) continue;
3749 //
3750 Int_t ncl = 0;
3751 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3752 sumy=sumz=sumy2=sumyz=sumw=0.0;
3753 for (Int_t j=0;j<ncandidates;j++){
3754 if (i==j) continue;
3755 AliITSRecPoint* cl1 = (AliITSRecPoint*)clusterArray->At(index[j]);
3756 //
3757 Float_t dz = cl0->GetZ()-cl1->GetZ();
3758 Float_t dy = cl0->GetY()-cl1->GetY();
3759 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3760 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3761 y[ncl] = cl1->GetY();
3762 z[ncl] = cl1->GetZ();
3763 sumy+= y[ncl]*weight;
3764 sumz+= z[ncl]*weight;
3765 sumy2+=y[ncl]*y[ncl]*weight;
3766 sumyz+=y[ncl]*z[ncl]*weight;
3767 sumw+=weight;
3768 ncl++;
3769 }
3770 }
3771 if (ncl<4) continue;
3772 Float_t det = sumw*sumy2 - sumy*sumy;
3773 Float_t delta=1000;
3774 if (TMath::Abs(det)>0.01){
3775 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3776 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3777 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3778 }
3779 else{
3780 Float_t z0 = sumyz/sumy;
3781 delta = TMath::Abs(cl0->GetZ()-z0);
3782 }
3783 if ( delta<0.05) {
3784 cl0->SetDeltaProbability(1-20.*delta);
3785 }
3786 }
3787}
3788//------------------------------------------------------------------------
3789void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3790{
3791 //
3792 // Update ESD track
3793 //
3794 track->UpdateESDtrack(flags);
3795 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3796 if (oldtrack) delete oldtrack;
3797 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3798 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
3799 printf("Problem\n");
3800 }
3801}
3802//------------------------------------------------------------------------
3803Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3804 //
3805 // Get nearest upper layer close to the point xr.
3806 // rough approximation
3807 //
3808 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3809 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3810 Int_t res =6;
3811 for (Int_t i=0;i<6;i++){
3812 if (radius<kRadiuses[i]){
3813 res =i;
3814 break;
3815 }
3816 }
3817 return res;
3818}
3819//------------------------------------------------------------------------
3820void AliITStrackerMI::UpdateTPCV0(const AliESDEvent *event){
3821 //
3822 //try to update, or reject TPC V0s
3823 //
3824 Int_t nv0s = event->GetNumberOfV0s();
3825 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3826
3827 for (Int_t i=0;i<nv0s;i++){
3828 AliESDv0 * vertex = event->GetV0(i);
3829 Int_t ip = vertex->GetIndex(0);
3830 Int_t im = vertex->GetIndex(1);
3831 //
3832 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3833 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3834 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3835 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3836 //
3837 //
3838 if (trackp){
3839 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3840 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3841 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3842 }
3843 }
3844
3845 if (trackm){
3846 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3847 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3848 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
3849 }
3850 }
3851 if (vertex->GetStatus()==-100) continue;
3852 //
3853 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3854 Int_t clayer = GetNearestLayer(xrp); //I.B.
3855 vertex->SetNBefore(clayer); //
3856 vertex->SetChi2Before(9*clayer); //
3857 vertex->SetNAfter(6-clayer); //
3858 vertex->SetChi2After(0); //
3859 //
3860 if (clayer >1 ){ // calculate chi2 before vertex
3861 Float_t chi2p = 0, chi2m=0;
3862 //
3863 if (trackp){
3864 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3865 if (trackp->GetClIndex(ilayer)>0){
3866 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3867 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3868 }
3869 else{
3870 chi2p+=9;
3871 }
3872 }
3873 }else{
3874 chi2p = 9*clayer;
3875 }
3876 //
3877 if (trackm){
3878 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
3879 if (trackm->GetClIndex(ilayer)>0){
3880 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3881 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3882 }
3883 else{
3884 chi2m+=9;
3885 }
3886 }
3887 }else{
3888 chi2m = 9*clayer;
3889 }
3890 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3891 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3892 }
3893
3894 if (clayer < 5 ){ // calculate chi2 after vertex
3895 Float_t chi2p = 0, chi2m=0;
3896 //
3897 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
3898 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3899 if (trackp->GetClIndex(ilayer)>0){
3900 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3901 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
3902 }
3903 else{
3904 chi2p+=9;
3905 }
3906 }
3907 }else{
3908 chi2p = 0;
3909 }
3910 //
3911 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
3912 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
3913 if (trackm->GetClIndex(ilayer)>0){
3914 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3915 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
3916 }
3917 else{
3918 chi2m+=9;
3919 }
3920 }
3921 }else{
3922 chi2m = 0;
3923 }
3924 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3925 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3926 }
3927 }
3928 //
3929}
3930//------------------------------------------------------------------------
3931void AliITStrackerMI::FindV02(AliESDEvent *event)
3932{
3933 //
3934 // V0 finder
3935 //
3936 // Cuts on DCA - R dependent
3937 // max distance DCA between 2 tracks cut
3938 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3939 //
3940 const Float_t kMaxDist0 = 0.1;
3941 const Float_t kMaxDist1 = 0.1;
3942 const Float_t kMaxDist = 1;
3943 const Float_t kMinPointAngle = 0.85;
3944 const Float_t kMinPointAngle2 = 0.99;
3945 const Float_t kMinR = 0.5;
3946 const Float_t kMaxR = 220;
3947 //const Float_t kCausality0Cut = 0.19;
3948 //const Float_t kLikelihood01Cut = 0.25;
3949 //const Float_t kPointAngleCut = 0.9996;
3950 const Float_t kCausality0Cut = 0.19;
3951 const Float_t kLikelihood01Cut = 0.45;
3952 const Float_t kLikelihood1Cut = 0.5;
3953 const Float_t kCombinedCut = 0.55;
3954
3955 //
3956 //
3957 TTreeSRedirector &cstream = *fDebugStreamer;
3958 Int_t ntracks = event->GetNumberOfTracks();
3959 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3960 fOriginal.Expand(ntracks);
3961 fTrackHypothesys.Expand(ntracks);
3962 fBestHypothesys.Expand(ntracks);
3963 //
3964 AliHelix * helixes = new AliHelix[ntracks+2];
3965 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3966 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3967 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3968 Bool_t * forbidden = new Bool_t [ntracks+2];
3969 Int_t *itsmap = new Int_t [ntracks+2];
3970 Float_t *dist = new Float_t[ntracks+2];
3971 Float_t *normdist0 = new Float_t[ntracks+2];
3972 Float_t *normdist1 = new Float_t[ntracks+2];
3973 Float_t *normdist = new Float_t[ntracks+2];
3974 Float_t *norm = new Float_t[ntracks+2];
3975 Float_t *maxr = new Float_t[ntracks+2];
3976 Float_t *minr = new Float_t[ntracks+2];
3977 Float_t *minPointAngle= new Float_t[ntracks+2];
3978 //
3979 AliV0 *pvertex = new AliV0;
3980 AliITStrackMI * dummy= new AliITStrackMI;
3981 dummy->SetLabel(0);
3982 AliITStrackMI trackat0; //temporary track for DCA calculation
3983 //
3984 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
3985 //
3986 // make ITS - ESD map
3987 //
3988 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3989 itsmap[itrack] = -1;
3990 forbidden[itrack] = kFALSE;
3991 maxr[itrack] = kMaxR;
3992 minr[itrack] = kMinR;
3993 minPointAngle[itrack] = kMinPointAngle;
3994 }
3995 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3996 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
3997 Int_t esdindex = original->GetESDtrack()->GetID();
3998 itsmap[esdindex] = itrack;
3999 }
4000 //
4001 // create ITS tracks from ESD tracks if not done before
4002 //
4003 for (Int_t itrack=0;itrack<ntracks;itrack++){
4004 if (itsmap[itrack]>=0) continue;
4005 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
4006 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
4007 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
4008 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
4009 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
4010 // tracks which can reach inner part of ITS
4011 // propagate track to outer its volume - with correction for material
4012 CorrectForTPCtoITSDeadZoneMaterial(tpctrack);
4013 }
4014 itsmap[itrack] = nitstracks;
4015 fOriginal.AddAt(tpctrack,nitstracks);
4016 nitstracks++;
4017 }
4018 //
4019 // fill temporary arrays
4020 //
4021 for (Int_t itrack=0;itrack<ntracks;itrack++){
4022 AliESDtrack * esdtrack = event->GetTrack(itrack);
4023 Int_t itsindex = itsmap[itrack];
4024 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
4025 if (!original) continue;
4026 AliITStrackMI *bestConst = 0;
4027 AliITStrackMI *bestLong = 0;
4028 AliITStrackMI *best = 0;
4029 //
4030 //
4031 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
4032 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
4033 // Get best track with vertex constrain
4034 for (Int_t ih=0;ih<hentries;ih++){
4035 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
4036 if (!trackh->GetConstrain()) continue;
4037 if (!bestConst) bestConst = trackh;
4038 if (trackh->GetNumberOfClusters()>5.0){
4039 bestConst = trackh; // full track - with minimal chi2
4040 break;
4041 }
4042 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
4043 bestConst = trackh;
4044 break;
4045 }
4046 // Get best long track without vertex constrain and best track without vertex constrain
4047 for (Int_t ih=0;ih<hentries;ih++){
4048 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
4049 if (trackh->GetConstrain()) continue;
4050 if (!best) best = trackh;
4051 if (!bestLong) bestLong = trackh;
4052 if (trackh->GetNumberOfClusters()>5.0){
4053 bestLong = trackh; // full track - with minimal chi2
4054 break;
4055 }
4056 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
4057 bestLong = trackh;
4058 }
4059 if (!best) {
4060 best = original;
4061 bestLong = original;
4062 }
4063 //I.B. trackat0 = *bestLong;
4064 new (&trackat0) AliITStrackMI(*bestLong);
4065 Double_t xx,yy,zz,alpha;
4066 if (!bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz)) continue;
4067 alpha = TMath::ATan2(yy,xx);
4068 if (!trackat0.Propagate(alpha,0)) continue;
4069 // calculate normalized distances to the vertex
4070 //
4071 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
4072 if ( bestLong->GetNumberOfClusters()>3 ){
4073 dist[itsindex] = trackat0.GetY();
4074 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
4075 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
4076 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
4077 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
4078 if (!bestConst){
4079 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
4080 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
4081 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
4082 }else{
4083 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
4084 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
4085 }
4086 }
4087 else{
4088 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
4089 dist[itsindex] = bestConst->GetD(0);
4090 norm[itsindex] = bestConst->GetDnorm(0);
4091 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
4092 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
4093 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
4094 }else{
4095 dist[itsindex] = trackat0.GetY();
4096 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
4097 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
4098 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
4099 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
4100 if (TMath::Abs(trackat0.GetTgl())>1.05){
4101 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
4102 if (normdist[itsindex]>3) {
4103 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
4104 }
4105 }
4106 }
4107 }
4108 //
4109 //-----------------------------------------------------------
4110 //Forbid primary track candidates -
4111 //
4112 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
4113 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
4114 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
4115 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
4116 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
4117 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
4118 //-----------------------------------------------------------
4119 if (bestConst){
4120 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
4121 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
4122 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>0 && bestConst->GetClIndex(1)>0 ) forbidden[itsindex]=kTRUE;
4123 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>0) forbidden[itsindex]=kTRUE;
4124 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
4125 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
4126 if (bestConst->GetNormChi2(0)<2.5) {
4127 minPointAngle[itsindex]= 0.9999;
4128 maxr[itsindex] = 10;
4129 }
4130 }
4131 //
4132 //forbid daughter kink candidates
4133 //
4134 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
4135 Bool_t isElectron = kTRUE;
4136 Bool_t isProton = kTRUE;
4137 Double_t pid[5];
4138 esdtrack->GetESDpid(pid);
4139 for (Int_t i=1;i<5;i++){
4140 if (pid[0]<pid[i]) isElectron= kFALSE;
4141 if (pid[4]<pid[i]) isProton= kFALSE;
4142 }
4143 if (isElectron){
4144 forbidden[itsindex]=kFALSE;
4145 normdist[itsindex]*=-1;
4146 }
4147 if (isProton){
4148 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
4149 normdist[itsindex]*=-1;
4150 }
4151
4152 //
4153 // Causality cuts in TPC volume
4154 //
4155 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
4156 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
4157 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
4158 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
4159 //
4160 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
4161 //
4162 //
4163 if (kFALSE){
4164 cstream<<"Track"<<
4165 "Tr0.="<<best<<
4166 "Tr1.="<<((bestConst)? bestConst:dummy)<<
4167 "Tr2.="<<bestLong<<
4168 "Tr3.="<<&trackat0<<
4169 "Esd.="<<esdtrack<<
4170 "Dist="<<dist[itsindex]<<
4171 "ND0="<<normdist0[itsindex]<<
4172 "ND1="<<normdist1[itsindex]<<
4173 "ND="<<normdist[itsindex]<<
4174 "Pz="<<primvertex[2]<<
4175 "Forbid="<<forbidden[itsindex]<<
4176 "\n";
4177 //
4178 }
4179 trackarray.AddAt(best,itsindex);
4180 trackarrayc.AddAt(bestConst,itsindex);
4181 trackarrayl.AddAt(bestLong,itsindex);
4182 new (&helixes[itsindex]) AliHelix(*best);
4183 }
4184 //
4185 //
4186 //
4187 // first iterration of V0 finder
4188 //
4189 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
4190 Int_t itrack0 = itsmap[iesd0];
4191 if (forbidden[itrack0]) continue;
4192 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
4193 if (!btrack0) continue;
4194 if (btrack0->GetSign()>0 && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;
4195 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
4196 //
4197 for (Int_t iesd1=iesd0+1;iesd1<ntracks;iesd1++){
4198 Int_t itrack1 = itsmap[iesd1];
4199 if (forbidden[itrack1]) continue;
4200
4201 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
4202 if (!btrack1) continue;
4203 if (btrack1->GetSign()<0 && !AliITSReconstructor::GetRecoParam()->GetStoreLikeSignV0s()) continue;
4204 Bool_t isGold = kFALSE;
4205 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
4206 isGold = kTRUE;
4207 }
4208 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
4209 AliHelix &h1 = helixes[itrack0];
4210 AliHelix &h2 = helixes[itrack1];
4211 //
4212 // find linear distance
4213 Double_t rmin =0;
4214 //
4215 //
4216 //
4217 Double_t phase[2][2],radius[2];
4218 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
4219 if (points==0) continue;
4220 Double_t delta[2]={1000000,1000000};
4221 rmin = radius[0];
4222 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
4223 if (points==2){
4224 if (radius[1]<rmin) rmin = radius[1];
4225 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
4226 }
4227 rmin = TMath::Sqrt(rmin);
4228 Double_t distance = 0;
4229 Double_t radiusC = 0;
4230 Int_t iphase = 0;
4231 if (points==1 || delta[0]<delta[1]){
4232 distance = TMath::Sqrt(delta[0]);
4233 radiusC = TMath::Sqrt(radius[0]);
4234 }else{
4235 distance = TMath::Sqrt(delta[1]);
4236 radiusC = TMath::Sqrt(radius[1]);
4237 iphase=1;
4238 }
4239 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
4240 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
4241 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
4242 if (distance>maxDist) continue;
4243 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
4244 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
4245 //
4246 //
4247 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
4248 //
4249 // if (distance>maxDist) continue;
4250 // if (pvertex->GetRr()<kMinR) continue;
4251 // if (pvertex->GetRr()>kMaxR) continue;
4252 AliITStrackMI * track0=btrack0;
4253 AliITStrackMI * track1=btrack1;
4254 // if (pvertex->GetRr()<3.5){
4255 if (radiusC<3.5){
4256 //use longest tracks inside the pipe
4257 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
4258 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
4259 }
4260 //
4261 //
4262 pvertex->SetParamN(*track0);
4263 pvertex->SetParamP(*track1);
4264 pvertex->Update(primvertex);
4265 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
4266
4267 if (pvertex->GetRr()<kMinR) continue;
4268 if (pvertex->GetRr()>kMaxR) continue;
4269 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
4270//Bo: if (pvertex->GetDist2()>maxDist) continue;
4271 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
4272//Bo: pvertex->SetLab(0,track0->GetLabel());
4273//Bo: pvertex->SetLab(1,track1->GetLabel());
4274 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4275 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4276 //
4277 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
4278 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
4279
4280 //
4281 //
4282 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
4283 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1) {
4284 fCurrentEsdTrack = itrack0;
4285 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
4286 }
4287 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
4288 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1) {
4289 fCurrentEsdTrack = itrack1;
4290 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
4291 }
4292 //
4293 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
4294 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
4295 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
4296 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
4297
4298 Float_t minchi2before0=16;
4299 Float_t minchi2before1=16;
4300 Float_t minchi2after0 =16;
4301 Float_t minchi2after1 =16;
4302 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
4303 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
4304
4305 if (array0b) for (Int_t i=0;i<5;i++){
4306 // best track after vertex
4307 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
4308 if (!btrack) continue;
4309 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
4310 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
4311 if (btrack->GetX()<pvertex->GetRr()-2.) {
4312 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
4313 Float_t sumchi2= 0;
4314 Float_t sumn = 0;
4315 if (maxLayer<3){ // take prim vertex as additional measurement
4316 if (normdist[itrack0]>0 && htrackc0){
4317 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
4318 }else{
4319 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
4320 }
4321 sumn += 3-maxLayer;
4322 }
4323 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4324 sumn+=1.;
4325 if (!btrack->GetClIndex(ilayer)){
4326 sumchi2+=25;
4327 continue;
4328 }else{
4329 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4330 for (Int_t itrack=0;itrack<4;itrack++){
4331 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
4332 sumchi2+=18.; //shared cluster
4333 break;
4334 }
4335 }
4336 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4337 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4338 }
4339 }
4340 sumchi2/=sumn;
4341 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
4342 }
4343 continue; //safety space - Geo manager will give exact layer
4344 }
4345 track0b = btrack;
4346 minchi2after0 = btrack->GetNormChi2(i);
4347 break;
4348 }
4349 if (array1b) for (Int_t i=0;i<5;i++){
4350 // best track after vertex
4351 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4352 if (!btrack) continue;
4353 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
4354 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
4355 if (btrack->GetX()<pvertex->GetRr()-2){
4356 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
4357 Float_t sumchi2= 0;
4358 Float_t sumn = 0;
4359 if (maxLayer<3){ // take prim vertex as additional measurement
4360 if (normdist[itrack1]>0 && htrackc1){
4361 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
4362 }else{
4363 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
4364 }
4365 sumn += 3-maxLayer;
4366 }
4367 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4368 sumn+=1.;
4369 if (!btrack->GetClIndex(ilayer)){
4370 sumchi2+=30;
4371 continue;
4372 }else{
4373 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
4374 for (Int_t itrack=0;itrack<4;itrack++){
4375 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
4376 sumchi2+=18.; //shared cluster
4377 break;
4378 }
4379 }
4380 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4381 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
4382 }
4383 }
4384 sumchi2/=sumn;
4385 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
4386 }
4387 continue; //safety space - Geo manager will give exact layer
4388 }
4389 track1b = btrack;
4390 minchi2after1 = btrack->GetNormChi2(i);
4391 break;
4392 }
4393 //
4394 // position resolution - used for DCA cut
4395 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4396 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4397 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
4398 sigmad =TMath::Sqrt(sigmad)+0.04;
4399 if (pvertex->GetRr()>50){
4400 Double_t cov0[15],cov1[15];
4401 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4402 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
4403 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4404 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4405 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4406 sigmad =TMath::Sqrt(sigmad)+0.05;
4407 }
4408 //
4409 AliV0 vertex2;
4410 vertex2.SetParamN(*track0b);
4411 vertex2.SetParamP(*track1b);
4412 vertex2.Update(primvertex);
4413 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4414 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4415 pvertex->SetParamN(*track0b);
4416 pvertex->SetParamP(*track1b);
4417 pvertex->Update(primvertex);
4418 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4419 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4420 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
4421 }
4422 pvertex->SetDistSigma(sigmad);
4423 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
4424 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
4425 //
4426 // define likelihhod and causalities
4427 //
4428 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
4429 if (maxLayer<1){
4430 Float_t fnorm0 = normdist[itrack0];
4431 if (fnorm0<0) fnorm0*=-3;
4432 Float_t fnorm1 = normdist[itrack1];
4433 if (fnorm1<0) fnorm1*=-3;
4434 if ((pvertex->GetAnglep()[2]>0.1) || ( (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 ) || (pvertex->GetRr()<3)){
4435 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4436 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
4437 }
4438 pvertex->SetChi2Before(normdist[itrack0]);
4439 pvertex->SetChi2After(normdist[itrack1]);
4440 pvertex->SetNAfter(0);
4441 pvertex->SetNBefore(0);
4442 }else{
4443 pvertex->SetChi2Before(minchi2before0);
4444 pvertex->SetChi2After(minchi2before1);
4445 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4446 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4447 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4448 }
4449 pvertex->SetNAfter(maxLayer);
4450 pvertex->SetNBefore(maxLayer);
4451 }
4452 if (pvertex->GetRr()<90){
4453 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
4454 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
4455 }
4456 if (pvertex->GetRr()<20){
4457 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4458 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
4459 }
4460 //
4461 pvertex->SetCausality(pb0,pb1,pa0,pa1);
4462 //
4463 // Likelihood calculations - apply cuts
4464 //
4465 Bool_t v0OK = kTRUE;
4466 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
4467 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
4468 p12 = TMath::Sqrt(p12); // "mean" momenta
4469 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4470 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4471
4472 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
4473 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*
4474 TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));
4475 //
4476 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4477 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4478 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4479
4480 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4481 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4482 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4483 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
4484 //
4485 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4486 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4487 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4488 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
4489
4490 //
4491 //
4492 if (kFALSE){
4493 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4494 cstream<<"It0"<<
4495 "Tr0.="<<track0<< //best without constrain
4496 "Tr1.="<<track1<< //best without constrain
4497 "Tr0B.="<<track0b<< //best without constrain after vertex
4498 "Tr1B.="<<track1b<< //best without constrain after vertex
4499 "Tr0C.="<<htrackc0<< //best with constrain if exist
4500 "Tr1C.="<<htrackc1<< //best with constrain if exist
4501 "Tr0L.="<<track0l<< //longest best
4502 "Tr1L.="<<track1l<< //longest best
4503 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4504 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
4505 "V0.="<<pvertex<< //vertex properties
4506 "V0b.="<<&vertex2<< //vertex properties at "best" track
4507 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4508 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4509 "Gold="<<gold<< //
4510 // "RejectBase="<<rejectBase<< //rejection in First itteration
4511 "OK="<<v0OK<<
4512 "rmin="<<rmin<<
4513 "sigmad="<<sigmad<<
4514 "\n";
4515 }
4516 //if (rejectBase) continue;
4517 //
4518 pvertex->SetStatus(0);
4519 // if (rejectBase) {
4520 // pvertex->SetStatus(-100);
4521 //}
4522 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4523 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4524 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4525 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
4526 if (v0OK){
4527 // AliV0vertex vertexjuri(*track0,*track1);
4528 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4529 // event->AddV0(&vertexjuri);
4530 pvertex->SetStatus(100);
4531 }
4532 pvertex->SetOnFlyStatus(kTRUE);
4533 pvertex->ChangeMassHypothesis(kK0Short);
4534 event->AddV0(pvertex);
4535 }
4536 }
4537 }
4538 //
4539 //
4540 // delete temporary arrays
4541 //
4542 delete[] forbidden;
4543 delete[] minPointAngle;
4544 delete[] maxr;
4545 delete[] minr;
4546 delete[] norm;
4547 delete[] normdist;
4548 delete[] normdist1;
4549 delete[] normdist0;
4550 delete[] dist;
4551 delete[] itsmap;
4552 delete[] helixes;
4553 delete pvertex;
4554}
4555//------------------------------------------------------------------------
4556void AliITStrackerMI::RefitV02(const AliESDEvent *event)
4557{
4558 //
4559 //try to refit V0s in the third path of the reconstruction
4560 //
4561 TTreeSRedirector &cstream = *fDebugStreamer;
4562 //
4563 Int_t nv0s = event->GetNumberOfV0s();
4564 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
4565 AliV0 v0temp;
4566 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
4567 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
4568 if (!v0mi) continue;
4569 Int_t itrack0 = v0mi->GetIndex(0);
4570 Int_t itrack1 = v0mi->GetIndex(1);
4571 AliESDtrack *esd0 = event->GetTrack(itrack0);
4572 AliESDtrack *esd1 = event->GetTrack(itrack1);
4573 if (!esd0||!esd1) continue;
4574 AliITStrackMI tpc0(*esd0);
4575 AliITStrackMI tpc1(*esd1);
4576 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4577 Double_t alpha =TMath::ATan2(y,x); //I.B.
4578 if (v0mi->GetRr()>85){
4579 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4580 v0temp.SetParamN(tpc0);
4581 v0temp.SetParamP(tpc1);
4582 v0temp.Update(primvertex);
4583 if (kFALSE) cstream<<"Refit"<<
4584 "V0.="<<v0mi<<
4585 "V0refit.="<<&v0temp<<
4586 "Tr0.="<<&tpc0<<
4587 "Tr1.="<<&tpc1<<
4588 "\n";
4589 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4590 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4591 v0mi->SetParamN(tpc0);
4592 v0mi->SetParamP(tpc1);
4593 v0mi->Update(primvertex);
4594 }
4595 }
4596 continue;
4597 }
4598 if (v0mi->GetRr()>35){
4599 CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
4600 CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
4601 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4602 v0temp.SetParamN(tpc0);
4603 v0temp.SetParamP(tpc1);
4604 v0temp.Update(primvertex);
4605 if (kFALSE) cstream<<"Refit"<<
4606 "V0.="<<v0mi<<
4607 "V0refit.="<<&v0temp<<
4608 "Tr0.="<<&tpc0<<
4609 "Tr1.="<<&tpc1<<
4610 "\n";
4611 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4612 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4613 v0mi->SetParamN(tpc0);
4614 v0mi->SetParamP(tpc1);
4615 v0mi->Update(primvertex);
4616 }
4617 }
4618 continue;
4619 }
4620 CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
4621 CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
4622 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4623 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
4624 v0temp.SetParamN(tpc0);
4625 v0temp.SetParamP(tpc1);
4626 v0temp.Update(primvertex);
4627 if (kFALSE) cstream<<"Refit"<<
4628 "V0.="<<v0mi<<
4629 "V0refit.="<<&v0temp<<
4630 "Tr0.="<<&tpc0<<
4631 "Tr1.="<<&tpc1<<
4632 "\n";
4633 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4634 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4635 v0mi->SetParamN(tpc0);
4636 v0mi->SetParamP(tpc1);
4637 v0mi->Update(primvertex);
4638 }
4639 }
4640 }
4641}
4642//------------------------------------------------------------------------
4643void AliITStrackerMI::BuildMaterialLUT(TString material) {
4644 //--------------------------------------------------------------------
4645 // Fill a look-up table with mean material
4646 //--------------------------------------------------------------------
4647
4648 Int_t n=1000;
4649 Double_t mparam[7];
4650 Double_t point1[3],point2[3];
4651 Double_t phi,cosphi,sinphi,z;
4652 // 0-5 layers, 6 pipe, 7-8 shields
4653 Double_t rmin[9]={ 3.5, 5.5,13.0,22.0,35.0,41.0, 2.0, 8.0,25.0};
4654 Double_t rmax[9]={ 5.5, 8.0,17.0,26.0,41.0,47.0, 3.0,10.5,30.0};
4655
4656 Int_t ifirst=0,ilast=0;
4657 if(material.Contains("Pipe")) {
4658 ifirst=6; ilast=6;
4659 } else if(material.Contains("Shields")) {
4660 ifirst=7; ilast=8;
4661 } else if(material.Contains("Layers")) {
4662 ifirst=0; ilast=5;
4663 } else {
4664 Error("BuildMaterialLUT","Wrong layer name\n");
4665 }
4666
4667 for(Int_t imat=ifirst; imat<=ilast; imat++) {
4668 Double_t param[5]={0.,0.,0.,0.,0.};
4669 for (Int_t i=0; i<n; i++) {
4670 phi = 2.*TMath::Pi()*gRandom->Rndm();
4671 cosphi = TMath::Cos(phi); sinphi = TMath::Sin(phi);
4672 z = 14.*(-1.+2.*gRandom->Rndm()); // SPD barrel
4673 point1[0] = rmin[imat]*cosphi;
4674 point1[1] = rmin[imat]*sinphi;
4675 point1[2] = z;
4676 point2[0] = rmax[imat]*cosphi;
4677 point2[1] = rmax[imat]*sinphi;
4678 point2[2] = z;
4679 AliTracker::MeanMaterialBudget(point1,point2,mparam);
4680 for(Int_t j=0;j<5;j++) param[j]+=mparam[j];
4681 }
4682 for(Int_t j=0;j<5;j++) param[j]/=(Float_t)n;
4683 if(imat<=5) {
4684 fxOverX0Layer[imat] = param[1];
4685 fxTimesRhoLayer[imat] = param[0]*param[4];
4686 } else if(imat==6) {
4687 fxOverX0Pipe = param[1];
4688 fxTimesRhoPipe = param[0]*param[4];
4689 } else if(imat==7) {
4690 fxOverX0Shield[0] = param[1];
4691 fxTimesRhoShield[0] = param[0]*param[4];
4692 } else if(imat==8) {
4693 fxOverX0Shield[1] = param[1];
4694 fxTimesRhoShield[1] = param[0]*param[4];
4695 }
4696 }
4697 /*
4698 printf("%s\n",material.Data());
4699 printf("%f %f\n",fxOverX0Pipe,fxTimesRhoPipe);
4700 printf("%f %f\n",fxOverX0Shield[0],fxTimesRhoShield[0]);
4701 printf("%f %f\n",fxOverX0Shield[1],fxTimesRhoShield[1]);
4702 printf("%f %f\n",fxOverX0Layer[0],fxTimesRhoLayer[0]);
4703 printf("%f %f\n",fxOverX0Layer[1],fxTimesRhoLayer[1]);
4704 printf("%f %f\n",fxOverX0Layer[2],fxTimesRhoLayer[2]);
4705 printf("%f %f\n",fxOverX0Layer[3],fxTimesRhoLayer[3]);
4706 printf("%f %f\n",fxOverX0Layer[4],fxTimesRhoLayer[4]);
4707 printf("%f %f\n",fxOverX0Layer[5],fxTimesRhoLayer[5]);
4708 */
4709 return;
4710}
4711//------------------------------------------------------------------------
4712Int_t AliITStrackerMI::CorrectForPipeMaterial(AliITStrackMI *t,
4713 TString direction) {
4714 //-------------------------------------------------------------------
4715 // Propagate beyond beam pipe and correct for material
4716 // (material budget in different ways according to fUseTGeo value)
4717 //-------------------------------------------------------------------
4718
4719 // Define budget mode:
4720 // 0: material from AliITSRecoParam (hard coded)
4721 // 1: material from TGeo in one step (on the fly)
4722 // 2: material from lut
4723 // 3: material from TGeo in one step (same for all hypotheses)
4724 Int_t mode;
4725 switch(fUseTGeo) {
4726 case 0:
4727 mode=0;
4728 break;
4729 case 1:
4730 mode=1;
4731 break;
4732 case 2:
4733 mode=2;
4734 break;
4735 case 3:
4736 if(fTrackingPhase.Contains("Clusters2Tracks"))
4737 { mode=3; } else { mode=1; }
4738 break;
4739 case 4:
4740 if(fTrackingPhase.Contains("Clusters2Tracks"))
4741 { mode=3; } else { mode=2; }
4742 break;
4743 default:
4744 mode=0;
4745 break;
4746 }
4747 if(fTrackingPhase.Contains("Default")) mode=0;
4748
4749 Int_t index=fCurrentEsdTrack;
4750
4751 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4752 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
4753 Double_t xToGo;
4754 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4755
4756 Double_t xOverX0,x0,lengthTimesMeanDensity;
4757 Bool_t anglecorr=kTRUE;
4758
4759 switch(mode) {
4760 case 0:
4761 xOverX0 = AliITSRecoParam::GetdPipe();
4762 x0 = AliITSRecoParam::GetX0Be();
4763 lengthTimesMeanDensity = xOverX0*x0;
4764 lengthTimesMeanDensity *= dir;
4765 if (!t->Propagate(xToGo)) return 0;
4766 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4767 break;
4768 case 1:
4769 if (!t->PropagateToTGeo(xToGo,1)) return 0;
4770 break;
4771 case 2:
4772 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
4773 xOverX0 = fxOverX0Pipe;
4774 lengthTimesMeanDensity = fxTimesRhoPipe;
4775 lengthTimesMeanDensity *= dir;
4776 if (!t->Propagate(xToGo)) return 0;
4777 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4778 break;
4779 case 3:
4780 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
4781 if(fxOverX0PipeTrks[index]<0) {
4782 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4783 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4784 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4785 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
4786 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4787 return 1;
4788 }
4789 xOverX0 = fxOverX0PipeTrks[index];
4790 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
4791 lengthTimesMeanDensity *= dir;
4792 if (!t->Propagate(xToGo)) return 0;
4793 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4794 break;
4795 }
4796
4797 return 1;
4798}
4799//------------------------------------------------------------------------
4800Int_t AliITStrackerMI::CorrectForShieldMaterial(AliITStrackMI *t,
4801 TString shield,
4802 TString direction) {
4803 //-------------------------------------------------------------------
4804 // Propagate beyond SPD or SDD shield and correct for material
4805 // (material budget in different ways according to fUseTGeo value)
4806 //-------------------------------------------------------------------
4807
4808 // Define budget mode:
4809 // 0: material from AliITSRecoParam (hard coded)
4810 // 1: material from TGeo in steps of X cm (on the fly)
4811 // X = AliITSRecoParam::GetStepSizeTGeo()
4812 // 2: material from lut
4813 // 3: material from TGeo in one step (same for all hypotheses)
4814 Int_t mode;
4815 switch(fUseTGeo) {
4816 case 0:
4817 mode=0;
4818 break;
4819 case 1:
4820 mode=1;
4821 break;
4822 case 2:
4823 mode=2;
4824 break;
4825 case 3:
4826 if(fTrackingPhase.Contains("Clusters2Tracks"))
4827 { mode=3; } else { mode=1; }
4828 break;
4829 case 4:
4830 if(fTrackingPhase.Contains("Clusters2Tracks"))
4831 { mode=3; } else { mode=2; }
4832 break;
4833 default:
4834 mode=0;
4835 break;
4836 }
4837 if(fTrackingPhase.Contains("Default")) mode=0;
4838
4839 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4840 Double_t rToGo;
4841 Int_t shieldindex=0;
4842 if (shield.Contains("SDD")) { // SDDouter
4843 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(1) : AliITSRecoParam::GetrOutsideShield(1));
4844 shieldindex=1;
4845 } else if (shield.Contains("SPD")) { // SPDouter
4846 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(0) : AliITSRecoParam::GetrOutsideShield(0));
4847 shieldindex=0;
4848 } else {
4849 Error("CorrectForShieldMaterial"," Wrong shield name\n");
4850 return 0;
4851 }
4852 Double_t xToGo;
4853 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4854
4855 Int_t index=2*fCurrentEsdTrack+shieldindex;
4856
4857 Double_t xOverX0,x0,lengthTimesMeanDensity;
4858 Bool_t anglecorr=kTRUE;
4859 Int_t nsteps=1;
4860
4861 switch(mode) {
4862 case 0:
4863 xOverX0 = AliITSRecoParam::Getdshield(shieldindex);
4864 x0 = AliITSRecoParam::GetX0shield(shieldindex);
4865 lengthTimesMeanDensity = xOverX0*x0;
4866 lengthTimesMeanDensity *= dir;
4867 if (!t->Propagate(xToGo)) return 0;
4868 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4869 break;
4870 case 1:
4871 nsteps= (Int_t)(TMath::Abs(t->GetX()-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4872 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4873 break;
4874 case 2:
4875 if(fxOverX0Shield[shieldindex]<0) BuildMaterialLUT("Shields");
4876 xOverX0 = fxOverX0Shield[shieldindex];
4877 lengthTimesMeanDensity = fxTimesRhoShield[shieldindex];
4878 lengthTimesMeanDensity *= dir;
4879 if (!t->Propagate(xToGo)) return 0;
4880 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4881 break;
4882 case 3:
4883 if(!fxOverX0ShieldTrks || index<0 || index>=2*fNtracks) Error("CorrectForShieldMaterial","Incorrect usage of UseTGeo option!\n");
4884 if(fxOverX0ShieldTrks[index]<0) {
4885 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4886 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4887 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4888 fxOverX0ShieldTrks[index] = TMath::Abs(xOverX0)/angle;
4889 fxTimesRhoShieldTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4890 return 1;
4891 }
4892 xOverX0 = fxOverX0ShieldTrks[index];
4893 lengthTimesMeanDensity = fxTimesRhoShieldTrks[index];
4894 lengthTimesMeanDensity *= dir;
4895 if (!t->Propagate(xToGo)) return 0;
4896 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4897 break;
4898 }
4899
4900 return 1;
4901}
4902//------------------------------------------------------------------------
4903Int_t AliITStrackerMI::CorrectForLayerMaterial(AliITStrackMI *t,
4904 Int_t layerindex,
4905 Double_t oldGlobXYZ[3],
4906 TString direction) {
4907 //-------------------------------------------------------------------
4908 // Propagate beyond layer and correct for material
4909 // (material budget in different ways according to fUseTGeo value)
4910 //-------------------------------------------------------------------
4911
4912 // Define budget mode:
4913 // 0: material from AliITSRecoParam (hard coded)
4914 // 1: material from TGeo in stepsof X cm (on the fly)
4915 // X = AliITSRecoParam::GetStepSizeTGeo()
4916 // 2: material from lut
4917 // 3: material from TGeo in one step (same for all hypotheses)
4918 Int_t mode;
4919 switch(fUseTGeo) {
4920 case 0:
4921 mode=0;
4922 break;
4923 case 1:
4924 mode=1;
4925 break;
4926 case 2:
4927 mode=2;
4928 break;
4929 case 3:
4930 if(fTrackingPhase.Contains("Clusters2Tracks"))
4931 { mode=3; } else { mode=1; }
4932 break;
4933 case 4:
4934 if(fTrackingPhase.Contains("Clusters2Tracks"))
4935 { mode=3; } else { mode=2; }
4936 break;
4937 default:
4938 mode=0;
4939 break;
4940 }
4941 if(fTrackingPhase.Contains("Default")) mode=0;
4942
4943 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4944
4945 Double_t r=fgLayers[layerindex].GetR();
4946 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
4947
4948 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
4949 Double_t xToGo;
4950 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4951
4952 Int_t index=6*fCurrentEsdTrack+layerindex;
4953
4954
4955 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
4956 Double_t mparam[7];
4957 Bool_t anglecorr=kTRUE;
4958 Int_t nsteps=1;
4959 Double_t rOld,xOld;
4960
4961 Bool_t addTime = kFALSE;
4962 switch(mode) {
4963 case 0:
4964 xOverX0 = fgLayers[layerindex].GetThickness(t->GetY(),t->GetZ(),x0);
4965 lengthTimesMeanDensity = xOverX0*x0;
4966 // Bring the track beyond the material
4967 if (!t->Propagate(xToGo)) return 0;
4968 lengthTimesMeanDensity *= dir;
4969 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4970 break;
4971 case 1:
4972 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
4973 if (!t->GetLocalXat(rOld,xOld)) return 0;
4974 if (!t->Propagate(xOld)) return 0; // back before material (no correction)
4975 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4976 if (!t->PropagateToTGeo(xToGo,nsteps,addTime)) return 0; // cross the material and apply correction
4977 break;
4978 case 2:
4979 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
4980 xOverX0 = fxOverX0Layer[layerindex];
4981 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
4982 // Bring the track beyond the material
4983 if (!t->Propagate(xToGo)) return 0;
4984 lengthTimesMeanDensity *= dir;
4985 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4986 break;
4987 case 3:
4988 if(!fxOverX0LayerTrks || index<0 || index>=6*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
4989 // Bring the track beyond the material
4990 if (!t->Propagate(xToGo)) return 0;
4991 Double_t globXYZ[3];
4992 if (!t->GetXYZ(globXYZ)) return 0;
4993 if (fxOverX0LayerTrks[index]<0) {
4994 AliTracker::MeanMaterialBudget(oldGlobXYZ,globXYZ,mparam);
4995 if(mparam[1]>900000) return 0;
4996 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4997 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4998 xOverX0=mparam[1]/angle;
4999 lengthTimesMeanDensity=mparam[0]*mparam[4]/angle;
5000 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0);
5001 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity);
5002 }
5003 xOverX0 = fxOverX0LayerTrks[index];
5004 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
5005 lengthTimesMeanDensity *= dir;
5006 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
5007 break;
5008 }
5009
5010 return 1;
5011}
5012//------------------------------------------------------------------------
5013void AliITStrackerMI::MakeTrksMaterialLUT(Int_t ntracks) {
5014 //-----------------------------------------------------------------
5015 // Initialize LUT for storing material for each prolonged track
5016 //-----------------------------------------------------------------
5017 fxOverX0PipeTrks = new Float_t[ntracks];
5018 fxTimesRhoPipeTrks = new Float_t[ntracks];
5019 fxOverX0ShieldTrks = new Float_t[ntracks*2];
5020 fxTimesRhoShieldTrks = new Float_t[ntracks*2];
5021 fxOverX0LayerTrks = new Float_t[ntracks*6];
5022 fxTimesRhoLayerTrks = new Float_t[ntracks*6];
5023
5024 for(Int_t i=0; i<ntracks; i++) {
5025 fxOverX0PipeTrks[i] = -1.;
5026 fxTimesRhoPipeTrks[i] = -1.;
5027 }
5028 for(Int_t j=0; j<ntracks*2; j++) {
5029 fxOverX0ShieldTrks[j] = -1.;
5030 fxTimesRhoShieldTrks[j] = -1.;
5031 }
5032 for(Int_t k=0; k<ntracks*6; k++) {
5033 fxOverX0LayerTrks[k] = -1.;
5034 fxTimesRhoLayerTrks[k] = -1.;
5035 }
5036
5037 fNtracks = ntracks;
5038
5039 return;
5040}
5041//------------------------------------------------------------------------
5042void AliITStrackerMI::DeleteTrksMaterialLUT() {
5043 //-----------------------------------------------------------------
5044 // Delete LUT for storing material for each prolonged track
5045 //-----------------------------------------------------------------
5046 if(fxOverX0PipeTrks) {
5047 delete [] fxOverX0PipeTrks; fxOverX0PipeTrks = 0;
5048 }
5049 if(fxOverX0ShieldTrks) {
5050 delete [] fxOverX0ShieldTrks; fxOverX0ShieldTrks = 0;
5051 }
5052
5053 if(fxOverX0LayerTrks) {
5054 delete [] fxOverX0LayerTrks; fxOverX0LayerTrks = 0;
5055 }
5056 if(fxTimesRhoPipeTrks) {
5057 delete [] fxTimesRhoPipeTrks; fxTimesRhoPipeTrks = 0;
5058 }
5059 if(fxTimesRhoShieldTrks) {
5060 delete [] fxTimesRhoShieldTrks; fxTimesRhoShieldTrks = 0;
5061 }
5062 if(fxTimesRhoLayerTrks) {
5063 delete [] fxTimesRhoLayerTrks; fxTimesRhoLayerTrks = 0;
5064 }
5065 return;
5066}
5067//------------------------------------------------------------------------
5068Int_t AliITStrackerMI::CheckSkipLayer(const AliITStrackMI *track,
5069 Int_t ilayer,Int_t idet) const {
5070 //-----------------------------------------------------------------
5071 // This method is used to decide whether to allow a prolongation
5072 // without clusters, because we want to skip the layer.
5073 // In this case the return value is > 0:
5074 // return 1: the user requested to skip a layer
5075 // return 2: track outside z acceptance of SSD/SDD and will cross both SPD
5076 //-----------------------------------------------------------------
5077
5078 if (AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilayer)) return 1;
5079
5080 if (idet<0 && ilayer>1 && AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance()) {
5081 // check if track will cross SPD outer layer
5082 Double_t phiAtSPD2,zAtSPD2;
5083 if (track->GetPhiZat(fgLayers[1].GetR(),phiAtSPD2,zAtSPD2)) {
5084 if (TMath::Abs(zAtSPD2)<2.*AliITSRecoParam::GetSPDdetzlength()) return 2;
5085 }
5086 }
5087
5088 return 0;
5089}
5090//------------------------------------------------------------------------
5091Int_t AliITStrackerMI::CheckDeadZone(AliITStrackMI *track,
5092 Int_t ilayer,Int_t idet,
5093 Double_t dz,Double_t dy,
5094 Bool_t noClusters) const {
5095 //-----------------------------------------------------------------
5096 // This method is used to decide whether to allow a prolongation
5097 // without clusters, because there is a dead zone in the road.
5098 // In this case the return value is > 0:
5099 // return 1: dead zone at z=0,+-7cm in SPD
5100 // return 2: all road is "bad" (dead or noisy) from the OCDB
5101 // return 3: something "bad" (dead or noisy) from the OCDB
5102 //-----------------------------------------------------------------
5103
5104 // check dead zones at z=0,+-7cm in the SPD
5105 if (ilayer<2 && !AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
5106 Double_t zmindead[3]={fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
5107 fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
5108 fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength()};
5109 Double_t zmaxdead[3]={fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
5110 fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
5111 fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength()};
5112 for (Int_t i=0; i<3; i++)
5113 if (track->GetZ()-dz<zmaxdead[i] && track->GetZ()+dz>zmindead[i]) {
5114 AliDebug(2,Form("crack SPD %d",ilayer));
5115 return 1;
5116 }
5117 }
5118
5119 // check bad zones from OCDB
5120 if (!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return 0;
5121
5122 if (idet<0) return 0;
5123
5124 AliITSdetector &det=fgLayers[ilayer].GetDetector(idet);
5125
5126 Int_t detType=-1;
5127 Float_t detSizeFactorX=0.0001,detSizeFactorZ=0.0001;
5128 if (ilayer==0 || ilayer==1) { // ---------- SPD
5129 detType = 0;
5130 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
5131 detType = 1;
5132 detSizeFactorX *= 2.;
5133 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
5134 detType = 2;
5135 }
5136 AliITSsegmentation *segm = (AliITSsegmentation*)fkDetTypeRec->GetSegmentationModel(detType);
5137 if (detType==2) segm->SetLayer(ilayer+1);
5138 Float_t detSizeX = detSizeFactorX*segm->Dx();
5139 Float_t detSizeZ = detSizeFactorZ*segm->Dz();
5140
5141 // check if the road overlaps with bad chips
5142 Float_t xloc,zloc;
5143 LocalModuleCoord(ilayer,idet,track,xloc,zloc);
5144 Float_t zlocmin = zloc-dz;
5145 Float_t zlocmax = zloc+dz;
5146 Float_t xlocmin = xloc-dy;
5147 Float_t xlocmax = xloc+dy;
5148 Int_t chipsInRoad[100];
5149
5150 // check if road goes out of detector
5151 Bool_t touchNeighbourDet=kFALSE;
5152 if (TMath::Abs(xlocmin)>0.5*detSizeX) {xlocmin=-0.5*detSizeX; touchNeighbourDet=kTRUE;}
5153 if (TMath::Abs(xlocmax)>0.5*detSizeX) {xlocmax=+0.5*detSizeX; touchNeighbourDet=kTRUE;}
5154 if (TMath::Abs(zlocmin)>0.5*detSizeZ) {zlocmin=-0.5*detSizeZ; touchNeighbourDet=kTRUE;}
5155 if (TMath::Abs(zlocmax)>0.5*detSizeZ) {zlocmax=+0.5*detSizeZ; touchNeighbourDet=kTRUE;}
5156 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));
5157
5158 // check if this detector is bad
5159 if (det.IsBad()) {
5160 AliDebug(2,Form("lay %d bad detector %d",ilayer,idet));
5161 if(!touchNeighbourDet) {
5162 return 2; // all detectors in road are bad
5163 } else {
5164 return 3; // at least one is bad
5165 }
5166 }
5167
5168 Int_t nChipsInRoad = segm->GetChipsInLocalWindow(chipsInRoad,zlocmin,zlocmax,xlocmin,xlocmax);
5169 AliDebug(2,Form("lay %d nChipsInRoad %d",ilayer,nChipsInRoad));
5170 if (!nChipsInRoad) return 0;
5171
5172 Bool_t anyBad=kFALSE,anyGood=kFALSE;
5173 for (Int_t iCh=0; iCh<nChipsInRoad; iCh++) {
5174 if (chipsInRoad[iCh]<0 || chipsInRoad[iCh]>det.GetNChips()-1) continue;
5175 AliDebug(2,Form(" chip %d bad %d",chipsInRoad[iCh],(Int_t)det.IsChipBad(chipsInRoad[iCh])));
5176 if (det.IsChipBad(chipsInRoad[iCh])) {
5177 anyBad=kTRUE;
5178 } else {
5179 anyGood=kTRUE;
5180 }
5181 }
5182
5183 if (!anyGood) {
5184 if(!touchNeighbourDet) {
5185 AliDebug(2,"all bad in road");
5186 return 2; // all chips in road are bad
5187 } else {
5188 return 3; // at least a bad chip in road
5189 }
5190 }
5191
5192 if (anyBad) {
5193 AliDebug(2,"at least a bad in road");
5194 return 3; // at least a bad chip in road
5195 }
5196
5197
5198 if (!AliITSReconstructor::GetRecoParam()->GetUseSingleBadChannelsFromOCDB()
5199 || ilayer==4 || ilayer==5 // SSD
5200 || !noClusters) return 0;
5201
5202 // There are no clusters in road: check if there is at least
5203 // a bad SPD pixel or SDD anode
5204
5205 Int_t idetInITS=idet;
5206 for(Int_t l=0;l<ilayer;l++) idetInITS+=AliITSgeomTGeo::GetNLadders(l+1)*AliITSgeomTGeo::GetNDetectors(l+1);
5207
5208 if (fITSChannelStatus->AnyBadInRoad(idetInITS,zlocmin,zlocmax,xlocmin,xlocmax)) {
5209 AliDebug(2,Form("Bad channel in det %d of layer %d\n",idet,ilayer));
5210 return 3;
5211 }
5212 //if (fITSChannelStatus->FractionOfBadInRoad(idet,zlocmin,zlocmax,xlocmin,xlocmax) > AliITSReconstructor::GetRecoParam()->GetMinFractionOfBadInRoad()) return 3;
5213
5214 return 0;
5215}
5216//------------------------------------------------------------------------
5217Bool_t AliITStrackerMI::LocalModuleCoord(Int_t ilayer,Int_t idet,
5218 const AliITStrackMI *track,
5219 Float_t &xloc,Float_t &zloc) const {
5220 //-----------------------------------------------------------------
5221 // Gives position of track in local module ref. frame
5222 //-----------------------------------------------------------------
5223
5224 xloc=0.;
5225 zloc=0.;
5226
5227 if(idet<0) return kFALSE;
5228
5229 Int_t ndet=AliITSgeomTGeo::GetNDetectors(ilayer+1); // layers from 1 to 6
5230
5231 Int_t lad = Int_t(idet/ndet) + 1;
5232
5233 Int_t det = idet - (lad-1)*ndet + 1;
5234
5235 Double_t xyzGlob[3],xyzLoc[3];
5236
5237 AliITSdetector &detector = fgLayers[ilayer].GetDetector(idet);
5238 // take into account the misalignment: xyz at real detector plane
5239 if(!track->GetXYZAt(detector.GetRmisal(),GetBz(),xyzGlob)) return kFALSE;
5240
5241 if(!AliITSgeomTGeo::GlobalToLocal(ilayer+1,lad,det,xyzGlob,xyzLoc)) return kFALSE;
5242
5243 xloc = (Float_t)xyzLoc[0];
5244 zloc = (Float_t)xyzLoc[2];
5245
5246 return kTRUE;
5247}
5248//------------------------------------------------------------------------
5249Bool_t AliITStrackerMI::IsOKForPlaneEff(const AliITStrackMI* track, const Int_t *clusters, Int_t ilayer) const {
5250//
5251// Method to be optimized further:
5252// Aim: decide whether a track can be used for PlaneEff evaluation
5253// the decision is taken based on the track quality at the layer under study
5254// no information on the clusters on this layer has to be used
5255// The criterium is to reject tracks at boundaries between basic block (e.g. SPD chip)
5256// the cut is done on number of sigmas from the boundaries
5257//
5258// Input: Actual track, layer [0,5] under study
5259// Output: none
5260// Return: kTRUE if this is a good track
5261//
5262// it will apply a pre-selection to obtain good quality tracks.
5263// Here also you will have the possibility to put a control on the
5264// impact point of the track on the basic block, in order to exclude border regions
5265// this will be done by calling a proper method of the AliITSPlaneEff class.
5266//
5267// input: AliITStrackMI* track, ilayer= layer number [0,5]
5268// return: Bool_t -> kTRUE if usable track, kFALSE if not usable.
5269//
5270 Int_t index[AliITSgeomTGeo::kNLayers];
5271 Int_t k;
5272 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
5273 //
5274 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
5275 index[k]=clusters[k];
5276 }
5277
5278 if(!fPlaneEff)
5279 {AliWarning("IsOKForPlaneEff: null pointer to AliITSPlaneEff"); return kFALSE;}
5280 AliITSlayer &layer=fgLayers[ilayer];
5281 Double_t r=layer.GetR();
5282 AliITStrackMI tmp(*track);
5283
5284// require a minimal number of cluster in other layers and eventually clusters in closest layers
5285 Int_t ncl=0;
5286 for(Int_t lay=AliITSgeomTGeo::kNLayers-1;lay>ilayer;lay--) {
5287 AliDebug(2,Form("trak=%d lay=%d ; index=%d ESD label= %d",tmp.GetLabel(),lay,
5288 tmp.GetClIndex(lay),((AliESDtrack*)tmp.GetESDtrack())->GetLabel())) ;
5289 if (tmp.GetClIndex(lay)>0) ncl++;
5290 }
5291 Bool_t nextout = kFALSE;
5292 if(ilayer==AliITSgeomTGeo::kNLayers-1) nextout=kTRUE; // you are already on the outermost layer
5293 else nextout = ((tmp.GetClIndex(ilayer+1)>0)? kTRUE : kFALSE );
5294 Bool_t nextin = kFALSE;
5295 if(ilayer==0) nextin=kTRUE; // you are already on the innermost layer
5296 else nextin = ((index[ilayer-1]>=0)? kTRUE : kFALSE );
5297 if(ncl<AliITSgeomTGeo::kNLayers-(ilayer+1)-AliITSReconstructor::GetRecoParam()->GetMaxMissingClustersPlaneEff())
5298 return kFALSE;
5299 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInOuterLayerPlaneEff() && !nextout) return kFALSE;
5300 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInInnerLayerPlaneEff() && !nextin) return kFALSE;
5301 if(tmp.Pt() < AliITSReconstructor::GetRecoParam()->GetMinPtPlaneEff()) return kFALSE;
5302 // if(AliITSReconstructor::GetRecoParam()->GetOnlyConstraintPlaneEff() && !tmp.GetConstrain()) return kFALSE;
5303
5304// detector number
5305 Double_t phi,z;
5306 if (!tmp.GetPhiZat(r,phi,z)) return kFALSE;
5307 Int_t idet=layer.FindDetectorIndex(phi,z);
5308 if(idet<0) { AliInfo(Form("cannot find detector"));
5309 return kFALSE;}
5310
5311 // here check if it has good Chi Square.
5312
5313 //propagate to the intersection with the detector plane
5314 const AliITSdetector &det=layer.GetDetector(idet);
5315 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return kFALSE;
5316
5317 Float_t locx; //
5318 Float_t locz; //
5319 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return kFALSE;
5320 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
5321 if(key>fPlaneEff->Nblock()) return kFALSE;
5322 Float_t blockXmn,blockXmx,blockZmn,blockZmx;
5323 if (!fPlaneEff->GetBlockBoundaries(key,blockXmn,blockXmx,blockZmn,blockZmx)) return kFALSE;
5324 //***************
5325 // DEFINITION OF SEARCH ROAD FOR accepting a track
5326 //
5327 //For the time being they are hard-wired, later on from AliITSRecoParam
5328 // Double_t nsigx=AliITSRecoParam::GetNSigXFarFromBoundary();
5329 // Double_t nsigz=AliITSRecoParam::GetNSigZFarFromBoundary();
5330 Double_t nsigz=4;
5331 Double_t nsigx=4;
5332 Double_t dx=nsigx*TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
5333 Double_t dz=nsigz*TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
5334 // done for RecPoints
5335
5336 // exclude tracks at boundary between detectors
5337 //Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidthPlaneEff();
5338 Double_t boundaryWidth=0; // for the time being hard-wired, later on from AliITSRecoParam
5339 AliDebug(2,Form("Tracking: track impact x=%f, y=%f, z=%f",tmp.GetX(), tmp.GetY(), tmp.GetZ()));
5340 AliDebug(2,Form("Local: track impact x=%f, z=%f",locx,locz));
5341 AliDebug(2,Form("Search Road. Tracking: dy=%f , dz=%f",dx,dz));
5342
5343 if ( (locx-dx < blockXmn+boundaryWidth) ||
5344 (locx+dx > blockXmx-boundaryWidth) ||
5345 (locz-dz < blockZmn+boundaryWidth) ||
5346 (locz+dz > blockZmx-boundaryWidth) ) return kFALSE;
5347 return kTRUE;
5348}
5349//------------------------------------------------------------------------
5350void AliITStrackerMI::UseTrackForPlaneEff(const AliITStrackMI* track, Int_t ilayer) {
5351//
5352// This Method has to be optimized! For the time-being it uses the same criteria
5353// as those used in the search of extra clusters for overlapping modules.
5354//
5355// Method Purpose: estabilish whether a track has produced a recpoint or not
5356// in the layer under study (For Plane efficiency)
5357//
5358// inputs: AliITStrackMI* track (pointer to a usable track)
5359// outputs: none
5360// side effects: update (by 1 count) the Plane Efficiency statistics of the basic block
5361// traversed by this very track. In details:
5362// - if a cluster can be associated to the track then call
5363// AliITSPlaneEff::UpDatePlaneEff(key,kTRUE);
5364// - if not, the AliITSPlaneEff::UpDatePlaneEff(key,kFALSE) is called
5365//
5366 if(!fPlaneEff)
5367 {AliWarning("UseTrackForPlaneEff: null pointer to AliITSPlaneEff"); return;}
5368 AliITSlayer &layer=fgLayers[ilayer];
5369 Double_t r=layer.GetR();
5370 AliITStrackMI tmp(*track);
5371
5372// detector number
5373 Double_t phi,z;
5374 if (!tmp.GetPhiZat(r,phi,z)) return;
5375 Int_t idet=layer.FindDetectorIndex(phi,z);
5376
5377 if(idet<0) { AliInfo(Form("cannot find detector"));
5378 return;}
5379
5380
5381//propagate to the intersection with the detector plane
5382 const AliITSdetector &det=layer.GetDetector(idet);
5383 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return;
5384
5385
5386//***************
5387// DEFINITION OF SEARCH ROAD FOR CLUSTERS SELECTION
5388//
5389 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
5390 TMath::Sqrt(tmp.GetSigmaZ2() +
5391 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
5392 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
5393 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
5394 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
5395 TMath::Sqrt(tmp.GetSigmaY2() +
5396 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
5397 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
5398 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
5399
5400// road in global (rphi,z) [i.e. in tracking ref. system]
5401 Double_t zmin = tmp.GetZ() - dz;
5402 Double_t zmax = tmp.GetZ() + dz;
5403 Double_t ymin = tmp.GetY() + r*det.GetPhi() - dy;
5404 Double_t ymax = tmp.GetY() + r*det.GetPhi() + dy;
5405
5406// select clusters in road
5407 layer.SelectClusters(zmin,zmax,ymin,ymax);
5408
5409// Define criteria for track-cluster association
5410 Double_t msz = tmp.GetSigmaZ2() +
5411 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
5412 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
5413 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
5414 Double_t msy = tmp.GetSigmaY2() +
5415 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
5416 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
5417 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
5418 if (tmp.GetConstrain()) {
5419 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
5420 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
5421 } else {
5422 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
5423 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
5424 }
5425 msz = 1./msz; // 1/RoadZ^2
5426 msy = 1./msy; // 1/RoadY^2
5427//
5428
5429 const AliITSRecPoint *cl=0; Int_t clidx=-1, ci=-1;
5430 Int_t idetc=-1;
5431 Double_t chi2trkcl=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
5432 //Double_t tolerance=0.2;
5433 /*while ((cl=layer.GetNextCluster(clidx))!=0) {
5434 idetc = cl->GetDetectorIndex();
5435 if(idet!=idetc) continue;
5436 //Int_t ilay = cl->GetLayer();
5437
5438 if (TMath::Abs(tmp.GetZ() - cl->GetZ()) > tolerance) continue;
5439 if (TMath::Abs(tmp.GetY() - cl->GetY()) > tolerance) continue;
5440
5441 Double_t chi2=tmp.GetPredictedChi2(cl);
5442 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; }
5443 }*/
5444 Float_t locx; //
5445 Float_t locz; //
5446 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return;
5447//
5448 AliDebug(2,Form("ilayer= %d, idet=%d, x= %f, z=%f",ilayer,idet,locx,locz));
5449 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
5450 if(key>fPlaneEff->Nblock()) return;
5451 Bool_t found=kFALSE;
5452 //if (ci>=0) {
5453 Double_t chi2;
5454 while ((cl=layer.GetNextCluster(clidx))!=0) {
5455 idetc = cl->GetDetectorIndex();
5456 if(idet!=idetc) continue;
5457 // here real control to see whether the cluster can be associated to the track.
5458 // cluster not associated to track
5459 if ( (tmp.GetZ()-cl->GetZ())*(tmp.GetZ()-cl->GetZ())*msz +
5460 (tmp.GetY()-cl->GetY())*(tmp.GetY()-cl->GetY())*msy > 1. ) continue;
5461 // calculate track-clusters chi2
5462 chi2 = GetPredictedChi2MI(&tmp,cl,ilayer); // note that this method change track tmp
5463 // in particular, the error associated to the cluster
5464 //Double_t chi2 = tmp.GetPredictedChi(cl); // this method does not change track tmp
5465 // chi2 cut
5466 if (chi2 > AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) continue;
5467 found=kTRUE;
5468 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; } // this just to trace which cluster is selected
5469 // track->SetExtraCluster(ilayer,(ilayer<<28)+ci);
5470 // track->SetExtraModule(ilayer,idetExtra);
5471 }
5472 if(!fPlaneEff->UpDatePlaneEff(found,key))
5473 AliWarning(Form("UseTrackForPlaneEff: cannot UpDate PlaneEff for key=%d",key));
5474 if(fPlaneEff->GetCreateHistos()&& AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) {
5475 Float_t tr[4]={99999.,99999.,9999.,9999.}; // initialize to high values
5476 Float_t clu[4]={-99999.,-99999.,9999.,9999.}; // (in some cases GetCov fails)
5477 Int_t cltype[2]={-999,-999};
5478
5479 tr[0]=locx;
5480 tr[1]=locz;
5481 tr[2]=TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
5482 tr[3]=TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
5483
5484 if (found){
5485 clu[0]=layer.GetCluster(ci)->GetDetLocalX();
5486 clu[1]=layer.GetCluster(ci)->GetDetLocalZ();
5487 cltype[0]=layer.GetCluster(ci)->GetNy();
5488 cltype[1]=layer.GetCluster(ci)->GetNz();
5489
5490 // Without the following 6 lines you would retrieve the nominal error of a cluster (e.g. for the SPD:
5491 // X->50/sqrt(12)=14 micron Z->450/sqrt(12)= 120 micron)
5492 // Within AliTrackerMI/AliTrackMI the error on the cluster is associated to the AliITStrackMI (fSigmaY,Z)
5493 // It is computed properly by calling the method
5494 // AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
5495 // T
5496 //Double_t x=0.5*(tmp.GetX()+layer.GetCluster(ci)->GetX()); // Take into account the mis-alignment
5497 //if (tmp.PropagateTo(x,0.,0.)) {
5498 chi2=GetPredictedChi2MI(&tmp,layer.GetCluster(ci),ilayer);
5499 AliCluster c(*layer.GetCluster(ci));
5500 c.SetSigmaY2(tmp.GetSigmaY(ilayer)*tmp.GetSigmaY(ilayer));
5501 c.SetSigmaZ2(tmp.GetSigmaZ(ilayer)*tmp.GetSigmaZ(ilayer));
5502 //if (layer.GetCluster(ci)->GetGlobalCov(cov)) // by using this, instead, you got nominal cluster errors
5503 clu[2]=TMath::Sqrt(c.GetSigmaY2());
5504 clu[3]=TMath::Sqrt(c.GetSigmaZ2());
5505 //}
5506 }
5507 fPlaneEff->FillHistos(key,found,tr,clu,cltype);
5508 }
5509return;
5510}