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1/**************************************************************************
2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15/* $Id$ */
16
17//-------------------------------------------------------------------------
18// Implementation of the ITS tracker class
19// It reads AliITSRecPoint clusters and creates AliITStrackMI tracks
20// and fills with them the ESD
21// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
22// Current support and development:
23// Andrea Dainese, andrea.dainese@lnl.infn.it
24// dE/dx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
25// Params moved to AliITSRecoParam by: Andrea Dainese, INFN
26// Material budget from TGeo by: Ludovic Gaudichet & Andrea Dainese, INFN
27//-------------------------------------------------------------------------
28
29#include <TMatrixD.h>
30#include <TTree.h>
31#include <TDatabasePDG.h>
32#include <TString.h>
33#include <TRandom.h>
34#include <TTreeStream.h>
35
36
37#include "AliLog.h"
38#include "AliITSPlaneEff.h"
39#include "AliITSCalibrationSPD.h"
40#include "AliITSCalibrationSDD.h"
41#include "AliITSCalibrationSSD.h"
42#include "AliCDBEntry.h"
43#include "AliCDBManager.h"
44#include "AliAlignObj.h"
45#include "AliTrackPointArray.h"
46#include "AliESDVertex.h"
47#include "AliESDEvent.h"
48#include "AliESDtrack.h"
49#include "AliV0.h"
50#include "AliHelix.h"
51#include "AliITSChannelStatus.h"
52#include "AliITSDetTypeRec.h"
53#include "AliITSRecPoint.h"
54#include "AliITSgeomTGeo.h"
55#include "AliITSReconstructor.h"
56#include "AliITSClusterParam.h"
57#include "AliITSsegmentation.h"
58#include "AliITSCalibration.h"
59#include "AliITSPlaneEffSPD.h"
60#include "AliITSPlaneEffSDD.h"
61#include "AliITSPlaneEffSSD.h"
62#include "AliITSV0Finder.h"
63#include "AliITStrackerMI.h"
64
65ClassImp(AliITStrackerMI)
66
67AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[AliITSgeomTGeo::kNLayers]; // ITS layers
68
69AliITStrackerMI::AliITStrackerMI():AliTracker(),
70fI(0),
71fBestTrack(),
72fTrackToFollow(),
73fTrackHypothesys(),
74fBestHypothesys(),
75fOriginal(),
76fCurrentEsdTrack(),
77fPass(0),
78fAfterV0(kFALSE),
79fLastLayerToTrackTo(0),
80fCoefficients(0),
81fEsd(0),
82fTrackingPhase("Default"),
83fUseTGeo(3),
84fNtracks(0),
85fxOverX0Pipe(-1.),
86fxTimesRhoPipe(-1.),
87fxOverX0PipeTrks(0),
88fxTimesRhoPipeTrks(0),
89fxOverX0ShieldTrks(0),
90fxTimesRhoShieldTrks(0),
91fxOverX0LayerTrks(0),
92fxTimesRhoLayerTrks(0),
93fDebugStreamer(0),
94fITSChannelStatus(0),
95fkDetTypeRec(0),
96fPlaneEff(0) {
97 //Default constructor
98 Int_t i;
99 for(i=0;i<4;i++) fSPDdetzcentre[i]=0.;
100 for(i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
101 for(i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
102}
103//------------------------------------------------------------------------
104AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
105fI(AliITSgeomTGeo::GetNLayers()),
106fBestTrack(),
107fTrackToFollow(),
108fTrackHypothesys(),
109fBestHypothesys(),
110fOriginal(),
111fCurrentEsdTrack(),
112fPass(0),
113fAfterV0(kFALSE),
114fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()),
115fCoefficients(0),
116fEsd(0),
117fTrackingPhase("Default"),
118fUseTGeo(3),
119fNtracks(0),
120fxOverX0Pipe(-1.),
121fxTimesRhoPipe(-1.),
122fxOverX0PipeTrks(0),
123fxTimesRhoPipeTrks(0),
124fxOverX0ShieldTrks(0),
125fxTimesRhoShieldTrks(0),
126fxOverX0LayerTrks(0),
127fxTimesRhoLayerTrks(0),
128fDebugStreamer(0),
129fITSChannelStatus(0),
130fkDetTypeRec(0),
131fPlaneEff(0) {
132 //--------------------------------------------------------------------
133 //This is the AliITStrackerMI constructor
134 //--------------------------------------------------------------------
135 if (geom) {
136 AliWarning("\"geom\" is actually a dummy argument !");
137 }
138
139 fCoefficients = 0;
140 fAfterV0 = kFALSE;
141
142 for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
143 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
144 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
145
146 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
147 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
148 Double_t poff=TMath::ATan2(y,x);
149 Double_t zoff=z;
150 Double_t r=TMath::Sqrt(x*x + y*y);
151
152 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
153 r += TMath::Sqrt(x*x + y*y);
154 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
155 r += TMath::Sqrt(x*x + y*y);
156 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
157 r += TMath::Sqrt(x*x + y*y);
158 r*=0.25;
159
160 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
161
162 for (Int_t j=1; j<nlad+1; j++) {
163 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
164 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
165 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
166 m.Multiply(tm);
167 Double_t txyz[3]={0.};
168 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
169 m.LocalToMaster(txyz,xyz);
170 r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
171 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
172
173 if (phi<0) phi+=TMath::TwoPi();
174 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
175
176 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
177 new(&det) AliITSdetector(r,phi);
178 // compute the real radius (with misalignment)
179 TGeoHMatrix mmisal(*(AliITSgeomTGeo::GetMatrix(i,j,k)));
180 mmisal.Multiply(tm);
181 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
182 mmisal.LocalToMaster(txyz,xyz);
183 Double_t rmisal=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
184 det.SetRmisal(rmisal);
185
186 } // end loop on detectors
187 } // end loop on ladders
188 } // end loop on layers
189
190
191 fI=AliITSgeomTGeo::GetNLayers();
192
193 fPass=0;
194 fConstraint[0]=1; fConstraint[1]=0;
195
196 Double_t xyzVtx[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
197 AliITSReconstructor::GetRecoParam()->GetYVdef(),
198 AliITSReconstructor::GetRecoParam()->GetZVdef()};
199 Double_t ersVtx[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
200 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
201 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
202 SetVertex(xyzVtx,ersVtx);
203
204 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i);
205 fLastLayerToTrackTo=AliITSRecoParam::GetLastLayerToTrackTo();
206 for (Int_t i=0;i<100000;i++){
207 fBestTrackIndex[i]=0;
208 }
209
210 // store positions of centre of SPD modules (in z)
211 Double_t tr[3];
212 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
213 fSPDdetzcentre[0] = tr[2];
214 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
215 fSPDdetzcentre[1] = tr[2];
216 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
217 fSPDdetzcentre[2] = tr[2];
218 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
219 fSPDdetzcentre[3] = tr[2];
220
221 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
222 if(AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance() && fUseTGeo!=1 && fUseTGeo!=3) {
223 AliWarning("fUseTGeo changed to 3 because fExtendedEtaAcceptance is kTRUE");
224 fUseTGeo = 3;
225 }
226
227 for(Int_t i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
228 for(Int_t i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
229
230 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
231
232 // only for plane efficiency evaluation
233 if (AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
234 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0) {
235 Int_t iplane=AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff();
236 if(!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(iplane)==1)
237 AliWarning(Form("Evaluation of Plane Eff for layer %d will be attempted without removing it from tracker",iplane));
238 if (iplane<2) fPlaneEff = new AliITSPlaneEffSPD();
239 else if (iplane<4) fPlaneEff = new AliITSPlaneEffSDD();
240 else fPlaneEff = new AliITSPlaneEffSSD();
241 if(AliITSReconstructor::GetRecoParam()->GetReadPlaneEffFromOCDB())
242 if(!fPlaneEff->ReadFromCDB()) {AliWarning("AliITStrackerMI reading of AliITSPlaneEff from OCDB failed") ;}
243 if(AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) fPlaneEff->SetCreateHistos(kTRUE);
244 }
245}
246//------------------------------------------------------------------------
247AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
248fI(tracker.fI),
249fBestTrack(tracker.fBestTrack),
250fTrackToFollow(tracker.fTrackToFollow),
251fTrackHypothesys(tracker.fTrackHypothesys),
252fBestHypothesys(tracker.fBestHypothesys),
253fOriginal(tracker.fOriginal),
254fCurrentEsdTrack(tracker.fCurrentEsdTrack),
255fPass(tracker.fPass),
256fAfterV0(tracker.fAfterV0),
257fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
258fCoefficients(tracker.fCoefficients),
259fEsd(tracker.fEsd),
260fTrackingPhase(tracker.fTrackingPhase),
261fUseTGeo(tracker.fUseTGeo),
262fNtracks(tracker.fNtracks),
263fxOverX0Pipe(tracker.fxOverX0Pipe),
264fxTimesRhoPipe(tracker.fxTimesRhoPipe),
265fxOverX0PipeTrks(0),
266fxTimesRhoPipeTrks(0),
267fxOverX0ShieldTrks(0),
268fxTimesRhoShieldTrks(0),
269fxOverX0LayerTrks(0),
270fxTimesRhoLayerTrks(0),
271fDebugStreamer(tracker.fDebugStreamer),
272fITSChannelStatus(tracker.fITSChannelStatus),
273fkDetTypeRec(tracker.fkDetTypeRec),
274fPlaneEff(tracker.fPlaneEff) {
275 //Copy constructor
276 Int_t i;
277 for(i=0;i<4;i++) {
278 fSPDdetzcentre[i]=tracker.fSPDdetzcentre[i];
279 }
280 for(i=0;i<6;i++) {
281 fxOverX0Layer[i]=tracker.fxOverX0Layer[i];
282 fxTimesRhoLayer[i]=tracker.fxTimesRhoLayer[i];
283 }
284 for(i=0;i<2;i++) {
285 fxOverX0Shield[i]=tracker.fxOverX0Shield[i];
286 fxTimesRhoShield[i]=tracker.fxTimesRhoShield[i];
287 }
288}
289//------------------------------------------------------------------------
290AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
291 //Assignment operator
292 this->~AliITStrackerMI();
293 new(this) AliITStrackerMI(tracker);
294 return *this;
295}
296//------------------------------------------------------------------------
297AliITStrackerMI::~AliITStrackerMI()
298{
299 //
300 //destructor
301 //
302 if (fCoefficients) delete [] fCoefficients;
303 DeleteTrksMaterialLUT();
304 if (fDebugStreamer) {
305 //fDebugStreamer->Close();
306 delete fDebugStreamer;
307 }
308 if(fITSChannelStatus) delete fITSChannelStatus;
309 if(fPlaneEff) delete fPlaneEff;
310}
311//------------------------------------------------------------------------
312void AliITStrackerMI::SetLayersNotToSkip(const Int_t *l) {
313 //--------------------------------------------------------------------
314 //This function set masks of the layers which must be not skipped
315 //--------------------------------------------------------------------
316 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=l[i];
317}
318//------------------------------------------------------------------------
319void AliITStrackerMI::ReadBadFromDetTypeRec() {
320 //--------------------------------------------------------------------
321 //This function read ITS bad detectors, chips, channels from AliITSDetTypeRec
322 //i.e. from OCDB
323 //--------------------------------------------------------------------
324
325 if(!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return;
326
327 Info("ReadBadFromDetTypeRec","Reading info about bad ITS detectors and channels");
328
329 if(!fkDetTypeRec) Error("ReadBadFromDetTypeRec","AliITSDetTypeRec nof found!\n");
330
331 // ITS channels map
332 if(fITSChannelStatus) delete fITSChannelStatus;
333 fITSChannelStatus = new AliITSChannelStatus(fkDetTypeRec);
334
335 // ITS detectors and chips
336 Int_t i=0,j=0,k=0,ndet=0;
337 for (i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
338 Int_t nBadDetsPerLayer=0;
339 ndet=AliITSgeomTGeo::GetNDetectors(i);
340 for (j=1; j<AliITSgeomTGeo::GetNLadders(i)+1; j++) {
341 for (k=1; k<ndet+1; k++) {
342 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
343 det.ReadBadDetectorAndChips(i-1,(j-1)*ndet + k-1,fkDetTypeRec);
344 if(det.IsBad()) {nBadDetsPerLayer++;}
345 } // end loop on detectors
346 } // end loop on ladders
347 Info("ReadBadFromDetTypeRec",Form("Layer %d: %d bad out of %d",i-1,nBadDetsPerLayer,ndet*AliITSgeomTGeo::GetNLadders(i)));
348 } // end loop on layers
349
350 return;
351}
352//------------------------------------------------------------------------
353Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
354 //--------------------------------------------------------------------
355 //This function loads ITS clusters
356 //--------------------------------------------------------------------
357 TBranch *branch=cTree->GetBranch("ITSRecPoints");
358 if (!branch) {
359 Error("LoadClusters"," can't get the branch !\n");
360 return 1;
361 }
362
363 static TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
364 branch->SetAddress(&clusters);
365
366 Int_t i=0,j=0,ndet=0;
367 Int_t detector=0;
368 for (i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
369 ndet=fgLayers[i].GetNdetectors();
370 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
371 for (; j<jmax; j++) {
372 if (!cTree->GetEvent(j)) continue;
373 Int_t ncl=clusters->GetEntriesFast();
374 SignDeltas(clusters,GetZ());
375
376 while (ncl--) {
377 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
378 detector=c->GetDetectorIndex();
379
380 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
381
382 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
383 }
384 clusters->Delete();
385 // add dead zone "virtual" cluster in SPD, if there is a cluster within
386 // zwindow cm from the dead zone
387 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
388 for (Float_t xdead = 0; xdead < AliITSRecoParam::GetSPDdetxlength(); xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
389 Int_t lab[4] = {0,0,0,detector};
390 Int_t info[3] = {0,0,i};
391 Float_t q = 0.; // this identifies virtual clusters
392 Float_t hit[5] = {xdead,
393 0.,
394 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
395 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
396 q};
397 Bool_t local = kTRUE;
398 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
399 hit[1] = fSPDdetzcentre[0]+0.5*AliITSRecoParam::GetSPDdetzlength();
400 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
401 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
402 hit[1] = fSPDdetzcentre[1]-0.5*AliITSRecoParam::GetSPDdetzlength();
403 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
404 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
405 hit[1] = fSPDdetzcentre[1]+0.5*AliITSRecoParam::GetSPDdetzlength();
406 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
407 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
408 hit[1] = fSPDdetzcentre[2]-0.5*AliITSRecoParam::GetSPDdetzlength();
409 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
410 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
411 hit[1] = fSPDdetzcentre[2]+0.5*AliITSRecoParam::GetSPDdetzlength();
412 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
413 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
414 hit[1] = fSPDdetzcentre[3]-0.5*AliITSRecoParam::GetSPDdetzlength();
415 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
416 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
417 }
418 } // "virtual" clusters in SPD
419
420 }
421 //
422 fgLayers[i].ResetRoad(); //road defined by the cluster density
423 fgLayers[i].SortClusters();
424 }
425
426 dummy.Clear();
427
428 return 0;
429}
430//------------------------------------------------------------------------
431void AliITStrackerMI::UnloadClusters() {
432 //--------------------------------------------------------------------
433 //This function unloads ITS clusters
434 //--------------------------------------------------------------------
435 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
436}
437//------------------------------------------------------------------------
438void AliITStrackerMI::FillClusterArray(TObjArray* array) const {
439 //--------------------------------------------------------------------
440 // Publishes all pointers to clusters known to the tracker into the
441 // passed object array.
442 // The ownership is not transfered - the caller is not expected to delete
443 // the clusters.
444 //--------------------------------------------------------------------
445
446 for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
447 for(Int_t icl=0; icl<fgLayers[i].GetNumberOfClusters(); icl++) {
448 AliCluster *cl = (AliCluster*)fgLayers[i].GetCluster(icl);
449 array->AddLast(cl);
450 }
451 }
452
453 return;
454}
455//------------------------------------------------------------------------
456Int_t AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
457 //--------------------------------------------------------------------
458 // Correction for the material between the TPC and the ITS
459 //--------------------------------------------------------------------
460 if (t->GetX() > AliITSRecoParam::Getriw()) { // inward direction
461 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw(),1)) return 0;// TPC inner wall
462 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
463 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
464 } else if (t->GetX() < AliITSRecoParam::Getrs()) { // outward direction
465 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
466 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
467 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw()+0.001,1)) return 0;// TPC inner wall
468 } else {
469 printf("CorrectForTPCtoITSDeadZoneMaterial: Track is already in the dead zone !\n");
470 return 0;
471 }
472
473 return 1;
474}
475//------------------------------------------------------------------------
476Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
477 //--------------------------------------------------------------------
478 // This functions reconstructs ITS tracks
479 // The clusters must be already loaded !
480 //--------------------------------------------------------------------
481
482
483 fTrackingPhase="Clusters2Tracks";
484
485 TObjArray itsTracks(15000);
486 fOriginal.Clear();
487 fEsd = event; // store pointer to the esd
488
489 // temporary (for cosmics)
490 if(event->GetVertex()) {
491 TString title = event->GetVertex()->GetTitle();
492 if(title.Contains("cosmics")) {
493 Double_t xyz[3]={GetX(),GetY(),GetZ()};
494 Double_t exyz[3]={0.1,0.1,0.1};
495 SetVertex(xyz,exyz);
496 }
497 }
498 // temporary
499
500 {/* Read ESD tracks */
501 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
502 Int_t nentr=event->GetNumberOfTracks();
503 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
504 while (nentr--) {
505 AliESDtrack *esd=event->GetTrack(nentr);
506 // ---- for debugging:
507 //if(TMath::Abs(esd->GetX()-83.65)<0.1) { FILE *f=fopen("tpc.dat","a"); fprintf(f,"%f %f %f %f %f %f\n",(Float_t)event->GetEventNumberInFile(),(Float_t)TMath::Abs(esd->GetLabel()),(Float_t)esd->GetX(),(Float_t)esd->GetY(),(Float_t)esd->GetZ(),(Float_t)esd->Pt()); fclose(f); }
508
509 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
510 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
511 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
512 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
513 AliITStrackMI *t=0;
514 try {
515 t=new AliITStrackMI(*esd);
516 } catch (const Char_t *msg) {
517 //Warning("Clusters2Tracks",msg);
518 delete t;
519 continue;
520 }
521 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
522 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
523
524
525 // look at the ESD mass hypothesys !
526 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
527 // write expected q
528 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
529
530 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
531 //track - can be V0 according to TPC
532 } else {
533 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
534 delete t;
535 continue;
536 }
537 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
538 delete t;
539 continue;
540 }
541 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
542 delete t;
543 continue;
544 }
545 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
546 delete t;
547 continue;
548 }
549 }
550 t->SetReconstructed(kFALSE);
551 itsTracks.AddLast(t);
552 fOriginal.AddLast(t);
553 }
554 } /* End Read ESD tracks */
555
556 itsTracks.Sort();
557 fOriginal.Sort();
558 Int_t nentr=itsTracks.GetEntriesFast();
559 fTrackHypothesys.Expand(nentr);
560 fBestHypothesys.Expand(nentr);
561 MakeCoefficients(nentr);
562 if(fUseTGeo==3 || fUseTGeo==4) MakeTrksMaterialLUT(event->GetNumberOfTracks());
563 Int_t ntrk=0;
564 // THE TWO TRACKING PASSES
565 for (fPass=0; fPass<2; fPass++) {
566 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
567 for (fCurrentEsdTrack=0; fCurrentEsdTrack<nentr; fCurrentEsdTrack++) {
568 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(fCurrentEsdTrack);
569 if (t==0) continue; //this track has been already tracked
570 //cout<<"========== "<<fPass<<" "<<fCurrentEsdTrack<<" =========\n";
571 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
572 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
573 if (fConstraint[fPass]) {
574 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
575 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
576 }
577
578 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
579 AliDebug(2,Form("LABEL %d pass %d",tpcLabel,fPass));
580 fI = 6;
581 ResetTrackToFollow(*t);
582 ResetBestTrack();
583
584 FollowProlongationTree(t,fCurrentEsdTrack,fConstraint[fPass]);
585
586
587 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
588 //
589 AliITStrackMI *besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
590 if (!besttrack) continue;
591 besttrack->SetLabel(tpcLabel);
592 // besttrack->CookdEdx();
593 CookdEdx(besttrack);
594 besttrack->SetFakeRatio(1.);
595 CookLabel(besttrack,0.); //For comparison only
596 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
597
598 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
599
600 t->SetReconstructed(kTRUE);
601 ntrk++;
602 AliDebug(2,Form("TRACK! (label %d) ncls %d",besttrack->GetLabel(),besttrack->GetNumberOfClusters()));
603 }
604 GetBestHypothesysMIP(itsTracks);
605 } // end loop on the two tracking passes
606
607 if(event->GetNumberOfV0s()>0) AliITSV0Finder::UpdateTPCV0(event,this);
608 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::FindV02(event,this);
609 fAfterV0 = kTRUE;
610 //
611 itsTracks.Delete();
612 //
613 Int_t entries = fTrackHypothesys.GetEntriesFast();
614 for (Int_t ientry=0; ientry<entries; ientry++) {
615 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
616 if (array) array->Delete();
617 delete fTrackHypothesys.RemoveAt(ientry);
618 }
619
620 fTrackHypothesys.Delete();
621 fBestHypothesys.Delete();
622 fOriginal.Clear();
623 delete [] fCoefficients;
624 fCoefficients=0;
625 DeleteTrksMaterialLUT();
626
627 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
628
629 fTrackingPhase="Default";
630
631 return 0;
632}
633//------------------------------------------------------------------------
634Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
635 //--------------------------------------------------------------------
636 // This functions propagates reconstructed ITS tracks back
637 // The clusters must be loaded !
638 //--------------------------------------------------------------------
639 fTrackingPhase="PropagateBack";
640 Int_t nentr=event->GetNumberOfTracks();
641 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
642
643 Int_t ntrk=0;
644 for (Int_t i=0; i<nentr; i++) {
645 AliESDtrack *esd=event->GetTrack(i);
646
647 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
648 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
649
650 AliITStrackMI *t=0;
651 try {
652 t=new AliITStrackMI(*esd);
653 } catch (const Char_t *msg) {
654 //Warning("PropagateBack",msg);
655 delete t;
656 continue;
657 }
658 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
659
660 ResetTrackToFollow(*t);
661 /*
662 // propagate to vertex [SR, GSI 17.02.2003]
663 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
664 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
665 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
666 fTrackToFollow.StartTimeIntegral();
667 // from vertex to outside pipe
668 CorrectForPipeMaterial(&fTrackToFollow,"outward");
669 }*/
670 // Start time integral and add distance from current position to vertex
671 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
672 fTrackToFollow.GetXYZ(xyzTrk);
673 Double_t dst2 = 0.;
674 for (Int_t icoord=0; icoord<3; icoord++) {
675 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
676 dst2 += di*di;
677 }
678 fTrackToFollow.StartTimeIntegral();
679 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
680
681 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
682 if (RefitAt(AliITSRecoParam::GetrInsideITSscreen(),&fTrackToFollow,t)) {
683 if (!CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)) {
684 delete t;
685 continue;
686 }
687 fTrackToFollow.SetLabel(t->GetLabel());
688 //fTrackToFollow.CookdEdx();
689 CookLabel(&fTrackToFollow,0.); //For comparison only
690 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
691 //UseClusters(&fTrackToFollow);
692 ntrk++;
693 }
694 delete t;
695 }
696
697 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
698
699 fTrackingPhase="Default";
700
701 return 0;
702}
703//------------------------------------------------------------------------
704Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
705 //--------------------------------------------------------------------
706 // This functions refits ITS tracks using the
707 // "inward propagated" TPC tracks
708 // The clusters must be loaded !
709 //--------------------------------------------------------------------
710 fTrackingPhase="RefitInward";
711
712 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::RefitV02(event,this);
713
714 Int_t nentr=event->GetNumberOfTracks();
715 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
716
717 Int_t ntrk=0;
718 for (Int_t i=0; i<nentr; i++) {
719 AliESDtrack *esd=event->GetTrack(i);
720
721 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
722 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
723 if (esd->GetStatus()&AliESDtrack::kTPCout)
724 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
725
726 AliITStrackMI *t=0;
727 try {
728 t=new AliITStrackMI(*esd);
729 } catch (const Char_t *msg) {
730 //Warning("RefitInward",msg);
731 delete t;
732 continue;
733 }
734 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
735 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
736 delete t;
737 continue;
738 }
739
740 ResetTrackToFollow(*t);
741 fTrackToFollow.ResetClusters();
742
743 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
744 fTrackToFollow.ResetCovariance(10.);
745
746 //Refitting...
747 Bool_t pe=(AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
748 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0);
749
750 AliDebug(2,Form("Refit LABEL %d %d",t->GetLabel(),t->GetNumberOfClusters()));
751 if (RefitAt(AliITSRecoParam::GetrInsideSPD1(),&fTrackToFollow,t,kTRUE,pe)) {
752 AliDebug(2," refit OK");
753 fTrackToFollow.SetLabel(t->GetLabel());
754 // fTrackToFollow.CookdEdx();
755 CookdEdx(&fTrackToFollow);
756
757 CookLabel(&fTrackToFollow,0.0); //For comparison only
758
759 //The beam pipe
760 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
761 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
762 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
763 //printf(" %d\n",esdTrack->GetITSModuleIndex(0));
764 //esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); //original line
765 Double_t r[3]={0.,0.,0.};
766 Double_t maxD=3.;
767 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
768 ntrk++;
769 }
770 }
771 delete t;
772 }
773
774 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
775
776 fTrackingPhase="Default";
777
778 return 0;
779}
780//------------------------------------------------------------------------
781AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
782 //--------------------------------------------------------------------
783 // Return pointer to a given cluster
784 //--------------------------------------------------------------------
785 Int_t l=(index & 0xf0000000) >> 28;
786 Int_t c=(index & 0x0fffffff) >> 00;
787 return fgLayers[l].GetCluster(c);
788}
789//------------------------------------------------------------------------
790Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
791 //--------------------------------------------------------------------
792 // Get track space point with index i
793 //--------------------------------------------------------------------
794
795 Int_t l=(index & 0xf0000000) >> 28;
796 Int_t c=(index & 0x0fffffff) >> 00;
797 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
798 Int_t idet = cl->GetDetectorIndex();
799
800 Float_t xyz[3];
801 Float_t cov[6];
802 cl->GetGlobalXYZ(xyz);
803 cl->GetGlobalCov(cov);
804 p.SetXYZ(xyz, cov);
805 p.SetCharge(cl->GetQ());
806 p.SetDriftTime(cl->GetDriftTime());
807 p.SetChargeRatio(cl->GetChargeRatio());
808 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
809 switch (l) {
810 case 0:
811 iLayer = AliGeomManager::kSPD1;
812 break;
813 case 1:
814 iLayer = AliGeomManager::kSPD2;
815 break;
816 case 2:
817 iLayer = AliGeomManager::kSDD1;
818 break;
819 case 3:
820 iLayer = AliGeomManager::kSDD2;
821 break;
822 case 4:
823 iLayer = AliGeomManager::kSSD1;
824 break;
825 case 5:
826 iLayer = AliGeomManager::kSSD2;
827 break;
828 default:
829 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
830 break;
831 };
832 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
833 p.SetVolumeID((UShort_t)volid);
834 return kTRUE;
835}
836//------------------------------------------------------------------------
837Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
838 AliTrackPoint& p, const AliESDtrack *t) {
839 //--------------------------------------------------------------------
840 // Get track space point with index i
841 // (assign error estimated during the tracking)
842 //--------------------------------------------------------------------
843
844 Int_t l=(index & 0xf0000000) >> 28;
845 Int_t c=(index & 0x0fffffff) >> 00;
846 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
847 Int_t idet = cl->GetDetectorIndex();
848
849 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
850
851 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
852 Float_t detxy[2];
853 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
854 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
855 Double_t alpha = t->GetAlpha();
856 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
857 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe,GetBz()));
858 phi += alpha-det.GetPhi();
859 Float_t tgphi = TMath::Tan(phi);
860
861 Float_t tgl = t->GetTgl(); // tgl about const along track
862 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
863
864 Float_t errlocalx,errlocalz;
865 Bool_t addMisalErr=kFALSE;
866 AliITSClusterParam::GetError(l,cl,tgl,tgphi,expQ,errlocalx,errlocalz,addMisalErr);
867
868 Float_t xyz[3];
869 Float_t cov[6];
870 cl->GetGlobalXYZ(xyz);
871 // cl->GetGlobalCov(cov);
872 Float_t pos[3] = {0.,0.,0.};
873 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errlocalx*errlocalx,errlocalz*errlocalz,0);
874 tmpcl.GetGlobalCov(cov);
875
876 p.SetXYZ(xyz, cov);
877 p.SetCharge(cl->GetQ());
878 p.SetDriftTime(cl->GetDriftTime());
879 p.SetChargeRatio(cl->GetChargeRatio());
880
881 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
882 switch (l) {
883 case 0:
884 iLayer = AliGeomManager::kSPD1;
885 break;
886 case 1:
887 iLayer = AliGeomManager::kSPD2;
888 break;
889 case 2:
890 iLayer = AliGeomManager::kSDD1;
891 break;
892 case 3:
893 iLayer = AliGeomManager::kSDD2;
894 break;
895 case 4:
896 iLayer = AliGeomManager::kSSD1;
897 break;
898 case 5:
899 iLayer = AliGeomManager::kSSD2;
900 break;
901 default:
902 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
903 break;
904 };
905 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
906
907 p.SetVolumeID((UShort_t)volid);
908 return kTRUE;
909}
910//------------------------------------------------------------------------
911void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
912{
913 //--------------------------------------------------------------------
914 // Follow prolongation tree
915 //--------------------------------------------------------------------
916 //
917 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
918 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
919
920
921 AliESDtrack * esd = otrack->GetESDtrack();
922 if (esd->GetV0Index(0)>0) {
923 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
924 // mapping of ESD track is different as ITS track in Containers
925 // Need something more stable
926 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
927 for (Int_t i=0;i<3;i++){
928 Int_t index = esd->GetV0Index(i);
929 if (index==0) break;
930 AliESDv0 * vertex = fEsd->GetV0(index);
931 if (vertex->GetStatus()<0) continue; // rejected V0
932 //
933 if (esd->GetSign()>0) {
934 vertex->SetIndex(0,esdindex);
935 } else {
936 vertex->SetIndex(1,esdindex);
937 }
938 }
939 }
940 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
941 if (!bestarray){
942 bestarray = new TObjArray(5);
943 fBestHypothesys.AddAt(bestarray,esdindex);
944 }
945
946 //
947 //setup tree of the prolongations
948 //
949 static AliITStrackMI tracks[7][100];
950 AliITStrackMI *currenttrack;
951 static AliITStrackMI currenttrack1;
952 static AliITStrackMI currenttrack2;
953 static AliITStrackMI backuptrack;
954 Int_t ntracks[7];
955 Int_t nindexes[7][100];
956 Float_t normalizedchi2[100];
957 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
958 otrack->SetNSkipped(0);
959 new (&(tracks[6][0])) AliITStrackMI(*otrack);
960 ntracks[6]=1;
961 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
962 Int_t modstatus = 1; // found
963 Float_t xloc,zloc;
964 //
965 //
966 // follow prolongations
967 for (Int_t ilayer=5; ilayer>=0; ilayer--) {
968 AliDebug(2,Form("FollowProlongationTree: layer %d",ilayer));
969 fI = ilayer;
970 //
971 AliITSlayer &layer=fgLayers[ilayer];
972 Double_t r = layer.GetR();
973 ntracks[ilayer]=0;
974 //
975 //
976 Int_t nskipped=0;
977 Float_t nused =0;
978 for (Int_t itrack =0; itrack<ntracks[ilayer+1]; itrack++) {
979 //set current track
980 if (ntracks[ilayer]>=100) break;
981 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
982 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
983 if (ntracks[ilayer]>15+ilayer){
984 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
985 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
986 }
987
988 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
989
990 // material between SSD and SDD, SDD and SPD
991 if (ilayer==3)
992 if(!CorrectForShieldMaterial(&currenttrack1,"SDD","inward")) continue;
993 if (ilayer==1)
994 if(!CorrectForShieldMaterial(&currenttrack1,"SPD","inward")) continue;
995
996 // detector number
997 Double_t phi,z;
998 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
999 Int_t idet=layer.FindDetectorIndex(phi,z);
1000
1001 Double_t trackGlobXYZ1[3];
1002 if (!currenttrack1.GetXYZ(trackGlobXYZ1)) continue;
1003
1004 // Get the budget to the primary vertex for the current track being prolonged
1005 Double_t budgetToPrimVertex = GetEffectiveThickness();
1006
1007 // check if we allow a prolongation without point
1008 Int_t skip = CheckSkipLayer(&currenttrack1,ilayer,idet);
1009 if (skip) {
1010 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1011 // propagate to the layer radius
1012 Double_t xToGo; if (!vtrack->GetLocalXat(r,xToGo)) continue;
1013 if(!vtrack->Propagate(xToGo)) continue;
1014 // apply correction for material of the current layer
1015 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1016 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
1017 vtrack->SetDeadZoneProbability(ilayer,1.); // no penalty for missing cluster
1018 vtrack->SetClIndex(ilayer,-1);
1019 modstatus = (skip==1 ? 3 : 4); // skipped : out in z
1020 if(LocalModuleCoord(ilayer,idet,vtrack,xloc,zloc)) { // local module coords
1021 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1022 }
1023 if(constrain) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1024 ntracks[ilayer]++;
1025 continue;
1026 }
1027
1028 // track outside layer acceptance in z
1029 if (idet<0) continue;
1030
1031 //propagate to the intersection with the detector plane
1032 const AliITSdetector &det=layer.GetDetector(idet);
1033 new(&currenttrack2) AliITStrackMI(currenttrack1);
1034 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
1035 if (!currenttrack2.Propagate(det.GetPhi(),det.GetR())) continue;
1036 currenttrack1.SetDetectorIndex(idet);
1037 currenttrack2.SetDetectorIndex(idet);
1038 if(!LocalModuleCoord(ilayer,idet,&currenttrack1,xloc,zloc)) continue; // local module coords
1039
1040 //***************
1041 // DEFINITION OF SEARCH ROAD AND CLUSTERS SELECTION
1042 //
1043 // road in global (rphi,z) [i.e. in tracking ref. system]
1044 Double_t zmin,zmax,ymin,ymax;
1045 if (!ComputeRoad(&currenttrack1,ilayer,idet,zmin,zmax,ymin,ymax)) continue;
1046
1047 // select clusters in road
1048 layer.SelectClusters(zmin,zmax,ymin,ymax);
1049 //********************
1050
1051 // Define criteria for track-cluster association
1052 Double_t msz = currenttrack1.GetSigmaZ2() +
1053 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1054 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1055 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
1056 Double_t msy = currenttrack1.GetSigmaY2() +
1057 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1058 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1059 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
1060 if (constrain) {
1061 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
1062 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
1063 } else {
1064 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
1065 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
1066 }
1067 msz = 1./msz; // 1/RoadZ^2
1068 msy = 1./msy; // 1/RoadY^2
1069
1070 //
1071 //
1072 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
1073 //
1074 const AliITSRecPoint *cl=0;
1075 Int_t clidx=-1;
1076 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
1077 Bool_t deadzoneSPD=kFALSE;
1078 currenttrack = &currenttrack1;
1079
1080 // check if the road contains a dead zone
1081 Bool_t noClusters = kFALSE;
1082 if (!layer.GetNextCluster(clidx,kTRUE)) noClusters=kTRUE;
1083 if (noClusters) AliDebug(2,"no clusters in road");
1084 Double_t dz=0.5*(zmax-zmin);
1085 Double_t dy=0.5*(ymax-ymin);
1086 Int_t dead = CheckDeadZone(&currenttrack1,ilayer,idet,dz,dy,noClusters);
1087 if(dead) AliDebug(2,Form("DEAD (%d)\n",dead));
1088 // create a prolongation without clusters (check also if there are no clusters in the road)
1089 if (dead ||
1090 (noClusters &&
1091 AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad())) {
1092 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1093 updatetrack->SetClIndex(ilayer,-1);
1094 if (dead==0) {
1095 modstatus = 5; // no cls in road
1096 } else if (dead==1) {
1097 modstatus = 7; // holes in z in SPD
1098 } else if (dead==2 || dead==3 || dead==4) {
1099 modstatus = 2; // dead from OCDB
1100 }
1101 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1102 // apply correction for material of the current layer
1103 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1104 if (constrain) { // apply vertex constrain
1105 updatetrack->SetConstrain(constrain);
1106 Bool_t isPrim = kTRUE;
1107 if (ilayer<4) { // check that it's close to the vertex
1108 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1109 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1110 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1111 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1112 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1113 }
1114 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1115 }
1116 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1117 if (dead) {
1118 if (dead==1) { // dead zone at z=0,+-7cm in SPD
1119 updatetrack->SetDeadZoneProbability(ilayer,GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1120 deadzoneSPD=kTRUE;
1121 } else if (dead==2 || dead==3) { // dead module or chip from OCDB
1122 updatetrack->SetDeadZoneProbability(ilayer,1.);
1123 } else if (dead==4) { // at least a single dead channel from OCDB
1124 updatetrack->SetDeadZoneProbability(ilayer,0.);
1125 }
1126 }
1127 ntracks[ilayer]++;
1128 }
1129
1130 clidx=-1;
1131 // loop over clusters in the road
1132 while ((cl=layer.GetNextCluster(clidx))!=0) {
1133 if (ntracks[ilayer]>95) break; //space for skipped clusters
1134 Bool_t changedet =kFALSE;
1135 if (cl->GetQ()==0 && deadzoneSPD==kTRUE) continue;
1136 Int_t idetc=cl->GetDetectorIndex();
1137
1138 if (currenttrack->GetDetectorIndex()==idetc) { // track already on the cluster's detector
1139 // take into account misalignment (bring track to real detector plane)
1140 Double_t xTrOrig = currenttrack->GetX();
1141 if (!currenttrack->Propagate(xTrOrig+cl->GetX())) continue;
1142 // a first cut on track-cluster distance
1143 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
1144 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
1145 { // cluster not associated to track
1146 AliDebug(2,"not associated");
1147 continue;
1148 }
1149 // bring track back to ideal detector plane
1150 if (!currenttrack->Propagate(xTrOrig)) continue;
1151 } else { // have to move track to cluster's detector
1152 const AliITSdetector &detc=layer.GetDetector(idetc);
1153 // a first cut on track-cluster distance
1154 Double_t y;
1155 if (!currenttrack2.GetProlongationFast(detc.GetPhi(),detc.GetR()+cl->GetX(),y,z)) continue;
1156 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
1157 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
1158 continue; // cluster not associated to track
1159 //
1160 new (&backuptrack) AliITStrackMI(currenttrack2);
1161 changedet = kTRUE;
1162 currenttrack =&currenttrack2;
1163 if (!currenttrack->Propagate(detc.GetPhi(),detc.GetR())) {
1164 new (currenttrack) AliITStrackMI(backuptrack);
1165 changedet = kFALSE;
1166 continue;
1167 }
1168 currenttrack->SetDetectorIndex(idetc);
1169 // Get again the budget to the primary vertex
1170 // for the current track being prolonged, if had to change detector
1171 //budgetToPrimVertex = GetEffectiveThickness();// not needed at the moment because anyway we take a mean material for this correction
1172 }
1173
1174 // calculate track-clusters chi2
1175 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
1176 // chi2 cut
1177 AliDebug(2,Form("chi2 %f max %f",chi2trkcl,AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)));
1178 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
1179 if (cl->GetQ()==0) deadzoneSPD=kTRUE; // only 1 prolongation with virtual cluster
1180 if (ntracks[ilayer]>=100) continue;
1181 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1182 updatetrack->SetClIndex(ilayer,-1);
1183 if (changedet) new (&currenttrack2) AliITStrackMI(backuptrack);
1184
1185 if (cl->GetQ()!=0) { // real cluster
1186 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) {
1187 AliDebug(2,"update failed");
1188 continue;
1189 }
1190 updatetrack->SetSampledEdx(cl->GetQ(),ilayer-2);
1191 modstatus = 1; // found
1192 } else { // virtual cluster in dead zone
1193 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1194 updatetrack->SetDeadZoneProbability(ilayer,GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1195 modstatus = 7; // holes in z in SPD
1196 }
1197
1198 if (changedet) {
1199 Float_t xlocnewdet,zlocnewdet;
1200 if(LocalModuleCoord(ilayer,idet,updatetrack,xlocnewdet,zlocnewdet)) { // local module coords
1201 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xlocnewdet,zlocnewdet);
1202 }
1203 } else {
1204 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1205 }
1206 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1207
1208 // apply correction for material of the current layer
1209 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1210
1211 if (constrain) { // apply vertex constrain
1212 updatetrack->SetConstrain(constrain);
1213 Bool_t isPrim = kTRUE;
1214 if (ilayer<4) { // check that it's close to the vertex
1215 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1216 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1217 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1218 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1219 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1220 }
1221 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1222 } //apply vertex constrain
1223 ntracks[ilayer]++;
1224 } // create new hypothesis
1225 else {
1226 AliDebug(2,"chi2 too large");
1227 }
1228
1229 } // loop over possible prolongations
1230
1231 // allow one prolongation without clusters
1232 if (constrain && itrack<=1 && currenttrack1.GetNSkipped()==0 && deadzoneSPD==kFALSE && ntracks[ilayer]<100) {
1233 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1234 // apply correction for material of the current layer
1235 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1236 vtrack->SetClIndex(ilayer,-1);
1237 modstatus = 3; // skipped
1238 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1239 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1240 vtrack->IncrementNSkipped();
1241 ntracks[ilayer]++;
1242 }
1243
1244 // allow one prolongation without clusters for tracks with |tgl|>1.1
1245 if (constrain && itrack==0 && TMath::Abs(currenttrack1.GetTgl())>1.1) { //big theta - for low flux
1246 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1247 // apply correction for material of the current layer
1248 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1249 vtrack->SetClIndex(ilayer,-1);
1250 modstatus = 3; // skipped
1251 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1252 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1253 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
1254 ntracks[ilayer]++;
1255 }
1256
1257
1258 } // loop over tracks in layer ilayer+1
1259
1260 //loop over track candidates for the current layer
1261 //
1262 //
1263 Int_t accepted=0;
1264
1265 Int_t golden=0;
1266 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1267 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
1268 if (normalizedchi2[itrack] <
1269 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
1270 if (ilayer>4) {
1271 accepted++;
1272 } else {
1273 if (constrain) { // constrain
1274 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1275 accepted++;
1276 } else { // !constrain
1277 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1278 accepted++;
1279 }
1280 }
1281 }
1282 // sort tracks by increasing normalized chi2
1283 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
1284 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
1285 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
1286 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
1287 } // end loop over layers
1288
1289
1290 //
1291 // Now select tracks to be kept
1292 //
1293 Int_t max = constrain ? 20 : 5;
1294
1295 // tracks that reach layer 0 (SPD inner)
1296 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
1297 AliITStrackMI & track= tracks[0][nindexes[0][i]];
1298 if (track.GetNumberOfClusters()<2) continue;
1299 if (!constrain && track.GetNormChi2(0) >
1300 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) {
1301 continue;
1302 }
1303 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1304 }
1305
1306 // tracks that reach layer 1 (SPD outer)
1307 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
1308 AliITStrackMI & track= tracks[1][nindexes[1][i]];
1309 if (track.GetNumberOfClusters()<4) continue;
1310 if (!constrain && track.GetNormChi2(1) >
1311 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1312 if (constrain) track.IncrementNSkipped();
1313 if (!constrain) {
1314 track.SetD(0,track.GetD(GetX(),GetY()));
1315 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
1316 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1317 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1318 }
1319 }
1320 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1321 }
1322
1323 // tracks that reach layer 2 (SDD inner), only during non-constrained pass
1324 if (!constrain){
1325 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
1326 AliITStrackMI & track= tracks[2][nindexes[2][i]];
1327 if (track.GetNumberOfClusters()<3) continue;
1328 if (!constrain && track.GetNormChi2(2) >
1329 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1330 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
1331 if (!constrain){
1332 track.SetD(0,track.GetD(GetX(),GetY()));
1333 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
1334 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1335 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1336 }
1337 }
1338 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1339 }
1340 }
1341
1342 if (!constrain) {
1343 //
1344 // register best track of each layer - important for V0 finder
1345 //
1346 for (Int_t ilayer=0;ilayer<5;ilayer++){
1347 if (ntracks[ilayer]==0) continue;
1348 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1349 if (track.GetNumberOfClusters()<1) continue;
1350 CookLabel(&track,0);
1351 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1352 }
1353 }
1354 //
1355 // update TPC V0 information
1356 //
1357 if (otrack->GetESDtrack()->GetV0Index(0)>0){
1358 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1359 for (Int_t i=0;i<3;i++){
1360 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
1361 if (index==0) break;
1362 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
1363 if (vertex->GetStatus()<0) continue; // rejected V0
1364 //
1365 if (otrack->GetSign()>0) {
1366 vertex->SetIndex(0,esdindex);
1367 }
1368 else{
1369 vertex->SetIndex(1,esdindex);
1370 }
1371 //find nearest layer with track info
1372 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1373 Int_t nearestold = GetNearestLayer(xrp); //I.B.
1374 Int_t nearest = nearestold;
1375 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1376 if (ntracks[nearest]==0){
1377 nearest = ilayer;
1378 }
1379 }
1380 //
1381 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1382 if (nearestold<5&&nearest<5){
1383 Bool_t accept = track.GetNormChi2(nearest)<10;
1384 if (accept){
1385 if (track.GetSign()>0) {
1386 vertex->SetParamP(track);
1387 vertex->Update(fprimvertex);
1388 //vertex->SetIndex(0,track.fESDtrack->GetID());
1389 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1390 }else{
1391 vertex->SetParamN(track);
1392 vertex->Update(fprimvertex);
1393 //vertex->SetIndex(1,track.fESDtrack->GetID());
1394 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1395 }
1396 vertex->SetStatus(vertex->GetStatus()+1);
1397 }else{
1398 //vertex->SetStatus(-2); // reject V0 - not enough clusters
1399 }
1400 }
1401 }
1402 }
1403
1404}
1405//------------------------------------------------------------------------
1406AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1407{
1408 //--------------------------------------------------------------------
1409 //
1410 //
1411 return fgLayers[layer];
1412}
1413//------------------------------------------------------------------------
1414AliITStrackerMI::AliITSlayer::AliITSlayer():
1415fR(0),
1416fPhiOffset(0),
1417fNladders(0),
1418fZOffset(0),
1419fNdetectors(0),
1420fDetectors(0),
1421fN(0),
1422fDy5(0),
1423fDy10(0),
1424fDy20(0),
1425fClustersCs(0),
1426fClusterIndexCs(0),
1427fYcs(0),
1428fZcs(0),
1429fNcs(0),
1430fCurrentSlice(-1),
1431fZmax(0),
1432fYmin(0),
1433fYmax(0),
1434fI(0),
1435fImax(0),
1436fSkip(0),
1437fAccepted(0),
1438fRoad(0){
1439 //--------------------------------------------------------------------
1440 //default AliITSlayer constructor
1441 //--------------------------------------------------------------------
1442 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1443 fClusterWeight[i]=0;
1444 fClusterTracks[0][i]=-1;
1445 fClusterTracks[1][i]=-1;
1446 fClusterTracks[2][i]=-1;
1447 fClusterTracks[3][i]=-1;
1448 }
1449}
1450//------------------------------------------------------------------------
1451AliITStrackerMI::AliITSlayer::
1452AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1453fR(r),
1454fPhiOffset(p),
1455fNladders(nl),
1456fZOffset(z),
1457fNdetectors(nd),
1458fDetectors(0),
1459fN(0),
1460fDy5(0),
1461fDy10(0),
1462fDy20(0),
1463fClustersCs(0),
1464fClusterIndexCs(0),
1465fYcs(0),
1466fZcs(0),
1467fNcs(0),
1468fCurrentSlice(-1),
1469fZmax(0),
1470fYmin(0),
1471fYmax(0),
1472fI(0),
1473fImax(0),
1474fSkip(0),
1475fAccepted(0),
1476fRoad(0) {
1477 //--------------------------------------------------------------------
1478 //main AliITSlayer constructor
1479 //--------------------------------------------------------------------
1480 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1481 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
1482}
1483//------------------------------------------------------------------------
1484AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1485fR(layer.fR),
1486fPhiOffset(layer.fPhiOffset),
1487fNladders(layer.fNladders),
1488fZOffset(layer.fZOffset),
1489fNdetectors(layer.fNdetectors),
1490fDetectors(layer.fDetectors),
1491fN(layer.fN),
1492fDy5(layer.fDy5),
1493fDy10(layer.fDy10),
1494fDy20(layer.fDy20),
1495fClustersCs(layer.fClustersCs),
1496fClusterIndexCs(layer.fClusterIndexCs),
1497fYcs(layer.fYcs),
1498fZcs(layer.fZcs),
1499fNcs(layer.fNcs),
1500fCurrentSlice(layer.fCurrentSlice),
1501fZmax(layer.fZmax),
1502fYmin(layer.fYmin),
1503fYmax(layer.fYmax),
1504fI(layer.fI),
1505fImax(layer.fImax),
1506fSkip(layer.fSkip),
1507fAccepted(layer.fAccepted),
1508fRoad(layer.fRoad){
1509 //Copy constructor
1510}
1511//------------------------------------------------------------------------
1512AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1513 //--------------------------------------------------------------------
1514 // AliITSlayer destructor
1515 //--------------------------------------------------------------------
1516 delete [] fDetectors;
1517 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1518 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1519 fClusterWeight[i]=0;
1520 fClusterTracks[0][i]=-1;
1521 fClusterTracks[1][i]=-1;
1522 fClusterTracks[2][i]=-1;
1523 fClusterTracks[3][i]=-1;
1524 }
1525}
1526//------------------------------------------------------------------------
1527void AliITStrackerMI::AliITSlayer::ResetClusters() {
1528 //--------------------------------------------------------------------
1529 // This function removes loaded clusters
1530 //--------------------------------------------------------------------
1531 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1532 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++){
1533 fClusterWeight[i]=0;
1534 fClusterTracks[0][i]=-1;
1535 fClusterTracks[1][i]=-1;
1536 fClusterTracks[2][i]=-1;
1537 fClusterTracks[3][i]=-1;
1538 }
1539
1540 fN=0;
1541 fI=0;
1542}
1543//------------------------------------------------------------------------
1544void AliITStrackerMI::AliITSlayer::ResetWeights() {
1545 //--------------------------------------------------------------------
1546 // This function reset weights of the clusters
1547 //--------------------------------------------------------------------
1548 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1549 fClusterWeight[i]=0;
1550 fClusterTracks[0][i]=-1;
1551 fClusterTracks[1][i]=-1;
1552 fClusterTracks[2][i]=-1;
1553 fClusterTracks[3][i]=-1;
1554 }
1555 for (Int_t i=0; i<fN;i++) {
1556 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1557 if (cl&&cl->IsUsed()) cl->Use();
1558 }
1559
1560}
1561//------------------------------------------------------------------------
1562void AliITStrackerMI::AliITSlayer::ResetRoad() {
1563 //--------------------------------------------------------------------
1564 // This function calculates the road defined by the cluster density
1565 //--------------------------------------------------------------------
1566 Int_t n=0;
1567 for (Int_t i=0; i<fN; i++) {
1568 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1569 }
1570 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
1571}
1572//------------------------------------------------------------------------
1573Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
1574 //--------------------------------------------------------------------
1575 //This function adds a cluster to this layer
1576 //--------------------------------------------------------------------
1577 if (fN==AliITSRecoParam::GetMaxClusterPerLayer()) {
1578 ::Error("InsertCluster","Too many clusters !\n");
1579 return 1;
1580 }
1581 fCurrentSlice=-1;
1582 fClusters[fN]=cl;
1583 fN++;
1584 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
1585 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1586 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1587 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1588 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
1589
1590 return 0;
1591}
1592//------------------------------------------------------------------------
1593void AliITStrackerMI::AliITSlayer::SortClusters()
1594{
1595 //
1596 //sort clusters
1597 //
1598 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1599 Float_t *z = new Float_t[fN];
1600 Int_t * index = new Int_t[fN];
1601 //
1602 for (Int_t i=0;i<fN;i++){
1603 z[i] = fClusters[i]->GetZ();
1604 }
1605 TMath::Sort(fN,z,index,kFALSE);
1606 for (Int_t i=0;i<fN;i++){
1607 clusters[i] = fClusters[index[i]];
1608 }
1609 //
1610 for (Int_t i=0;i<fN;i++){
1611 fClusters[i] = clusters[i];
1612 fZ[i] = fClusters[i]->GetZ();
1613 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1614 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1615 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1616 fY[i] = y;
1617 }
1618 delete[] index;
1619 delete[] z;
1620 delete[] clusters;
1621 //
1622
1623 fYB[0]=10000000;
1624 fYB[1]=-10000000;
1625 for (Int_t i=0;i<fN;i++){
1626 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1627 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1628 fClusterIndex[i] = i;
1629 }
1630 //
1631 // fill slices
1632 fDy5 = (fYB[1]-fYB[0])/5.;
1633 fDy10 = (fYB[1]-fYB[0])/10.;
1634 fDy20 = (fYB[1]-fYB[0])/20.;
1635 for (Int_t i=0;i<6;i++) fN5[i] =0;
1636 for (Int_t i=0;i<11;i++) fN10[i]=0;
1637 for (Int_t i=0;i<21;i++) fN20[i]=0;
1638 //
1639 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;}
1640 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;}
1641 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;}
1642 //
1643 //
1644 for (Int_t i=0;i<fN;i++)
1645 for (Int_t irot=-1;irot<=1;irot++){
1646 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1647 // slice 5
1648 for (Int_t slice=0; slice<6;slice++){
1649 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<AliITSRecoParam::GetMaxClusterPerLayer5()){
1650 fClusters5[slice][fN5[slice]] = fClusters[i];
1651 fY5[slice][fN5[slice]] = curY;
1652 fZ5[slice][fN5[slice]] = fZ[i];
1653 fClusterIndex5[slice][fN5[slice]]=i;
1654 fN5[slice]++;
1655 }
1656 }
1657 // slice 10
1658 for (Int_t slice=0; slice<11;slice++){
1659 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<AliITSRecoParam::GetMaxClusterPerLayer10()){
1660 fClusters10[slice][fN10[slice]] = fClusters[i];
1661 fY10[slice][fN10[slice]] = curY;
1662 fZ10[slice][fN10[slice]] = fZ[i];
1663 fClusterIndex10[slice][fN10[slice]]=i;
1664 fN10[slice]++;
1665 }
1666 }
1667 // slice 20
1668 for (Int_t slice=0; slice<21;slice++){
1669 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<AliITSRecoParam::GetMaxClusterPerLayer20()){
1670 fClusters20[slice][fN20[slice]] = fClusters[i];
1671 fY20[slice][fN20[slice]] = curY;
1672 fZ20[slice][fN20[slice]] = fZ[i];
1673 fClusterIndex20[slice][fN20[slice]]=i;
1674 fN20[slice]++;
1675 }
1676 }
1677 }
1678
1679 //
1680 // consistency check
1681 //
1682 for (Int_t i=0;i<fN-1;i++){
1683 if (fZ[i]>fZ[i+1]){
1684 printf("Bug\n");
1685 }
1686 }
1687 //
1688 for (Int_t slice=0;slice<21;slice++)
1689 for (Int_t i=0;i<fN20[slice]-1;i++){
1690 if (fZ20[slice][i]>fZ20[slice][i+1]){
1691 printf("Bug\n");
1692 }
1693 }
1694
1695
1696}
1697//------------------------------------------------------------------------
1698Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1699 //--------------------------------------------------------------------
1700 // This function returns the index of the nearest cluster
1701 //--------------------------------------------------------------------
1702 Int_t ncl=0;
1703 const Float_t *zcl;
1704 if (fCurrentSlice<0) {
1705 ncl = fN;
1706 zcl = fZ;
1707 }
1708 else{
1709 ncl = fNcs;
1710 zcl = fZcs;;
1711 }
1712
1713 if (ncl==0) return 0;
1714 Int_t b=0, e=ncl-1, m=(b+e)/2;
1715 for (; b<e; m=(b+e)/2) {
1716 // if (z > fClusters[m]->GetZ()) b=m+1;
1717 if (z > zcl[m]) b=m+1;
1718 else e=m;
1719 }
1720 return m;
1721}
1722//------------------------------------------------------------------------
1723Bool_t AliITStrackerMI::ComputeRoad(AliITStrackMI* track,Int_t ilayer,Int_t idet,Double_t &zmin,Double_t &zmax,Double_t &ymin,Double_t &ymax) const {
1724 //--------------------------------------------------------------------
1725 // This function computes the rectangular road for this track
1726 //--------------------------------------------------------------------
1727
1728
1729 AliITSdetector &det = fgLayers[ilayer].GetDetector(idet);
1730 // take into account the misalignment: propagate track to misaligned detector plane
1731 if (!track->Propagate(det.GetPhi(),det.GetRmisal())) return kFALSE;
1732
1733 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
1734 TMath::Sqrt(track->GetSigmaZ2() +
1735 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1736 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1737 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
1738 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
1739 TMath::Sqrt(track->GetSigmaY2() +
1740 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1741 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1742 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
1743
1744 // track at boundary between detectors, enlarge road
1745 Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidth();
1746 if ( (track->GetY()-dy < det.GetYmin()+boundaryWidth) ||
1747 (track->GetY()+dy > det.GetYmax()-boundaryWidth) ||
1748 (track->GetZ()-dz < det.GetZmin()+boundaryWidth) ||
1749 (track->GetZ()+dz > det.GetZmax()-boundaryWidth) ) {
1750 Float_t tgl = TMath::Abs(track->GetTgl());
1751 if (tgl > 1.) tgl=1.;
1752 Double_t deltaXNeighbDets=AliITSRecoParam::GetDeltaXNeighbDets();
1753 dz = TMath::Sqrt(dz*dz+deltaXNeighbDets*deltaXNeighbDets*tgl*tgl);
1754 Float_t snp = TMath::Abs(track->GetSnp());
1755 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) return kFALSE;
1756 dy = TMath::Sqrt(dy*dy+deltaXNeighbDets*deltaXNeighbDets*snp*snp);
1757 } // boundary
1758
1759 // add to the road a term (up to 2-3 mm) to deal with misalignments
1760 dy = TMath::Sqrt(dy*dy + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1761 dz = TMath::Sqrt(dz*dz + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1762
1763 Double_t r = fgLayers[ilayer].GetR();
1764 zmin = track->GetZ() - dz;
1765 zmax = track->GetZ() + dz;
1766 ymin = track->GetY() + r*det.GetPhi() - dy;
1767 ymax = track->GetY() + r*det.GetPhi() + dy;
1768
1769 // bring track back to idead detector plane
1770 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
1771
1772 return kTRUE;
1773}
1774//------------------------------------------------------------------------
1775void AliITStrackerMI::AliITSlayer::
1776SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1777 //--------------------------------------------------------------------
1778 // This function sets the "window"
1779 //--------------------------------------------------------------------
1780
1781 Double_t circle=2*TMath::Pi()*fR;
1782 fYmin = ymin; fYmax =ymax;
1783 Float_t ymiddle = (fYmin+fYmax)*0.5;
1784 if (ymiddle<fYB[0]) {
1785 fYmin+=circle; fYmax+=circle; ymiddle+=circle;
1786 } else if (ymiddle>fYB[1]) {
1787 fYmin-=circle; fYmax-=circle; ymiddle-=circle;
1788 }
1789
1790 //
1791 fCurrentSlice =-1;
1792 // defualt take all
1793 fClustersCs = fClusters;
1794 fClusterIndexCs = fClusterIndex;
1795 fYcs = fY;
1796 fZcs = fZ;
1797 fNcs = fN;
1798 //
1799 //is in 20 slice?
1800 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1801 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1802 if (slice<0) slice=0;
1803 if (slice>20) slice=20;
1804 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1805 if (isOK) {
1806 fCurrentSlice=slice;
1807 fClustersCs = fClusters20[fCurrentSlice];
1808 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1809 fYcs = fY20[fCurrentSlice];
1810 fZcs = fZ20[fCurrentSlice];
1811 fNcs = fN20[fCurrentSlice];
1812 }
1813 }
1814 //
1815 //is in 10 slice?
1816 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1817 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1818 if (slice<0) slice=0;
1819 if (slice>10) slice=10;
1820 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1821 if (isOK) {
1822 fCurrentSlice=slice;
1823 fClustersCs = fClusters10[fCurrentSlice];
1824 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1825 fYcs = fY10[fCurrentSlice];
1826 fZcs = fZ10[fCurrentSlice];
1827 fNcs = fN10[fCurrentSlice];
1828 }
1829 }
1830 //
1831 //is in 5 slice?
1832 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1833 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1834 if (slice<0) slice=0;
1835 if (slice>5) slice=5;
1836 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1837 if (isOK) {
1838 fCurrentSlice=slice;
1839 fClustersCs = fClusters5[fCurrentSlice];
1840 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1841 fYcs = fY5[fCurrentSlice];
1842 fZcs = fZ5[fCurrentSlice];
1843 fNcs = fN5[fCurrentSlice];
1844 }
1845 }
1846 //
1847 fI=FindClusterIndex(zmin); fZmax=zmax;
1848 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1849 fSkip = 0;
1850 fAccepted =0;
1851
1852 return;
1853}
1854//------------------------------------------------------------------------
1855Int_t AliITStrackerMI::AliITSlayer::
1856FindDetectorIndex(Double_t phi, Double_t z) const {
1857 //--------------------------------------------------------------------
1858 //This function finds the detector crossed by the track
1859 //--------------------------------------------------------------------
1860 Double_t dphi;
1861 if (fZOffset<0) // old geometry
1862 dphi = -(phi-fPhiOffset);
1863 else // new geometry
1864 dphi = phi-fPhiOffset;
1865
1866
1867 if (dphi < 0) dphi += 2*TMath::Pi();
1868 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1869 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1870 if (np>=fNladders) np-=fNladders;
1871 if (np<0) np+=fNladders;
1872
1873
1874 Double_t dz=fZOffset-z;
1875 Double_t nnz = dz*(fNdetectors-1)*0.5/fZOffset+0.5;
1876 Int_t nz = (nnz<0 ? -1 : (Int_t)nnz);
1877 if (nz>=fNdetectors) return -1;
1878 if (nz<0) return -1;
1879
1880 // ad hoc correction for 3rd ladder of SDD inner layer,
1881 // which is reversed (rotated by pi around local y)
1882 // this correction is OK only from AliITSv11Hybrid onwards
1883 if (GetR()>12. && GetR()<20.) { // SDD inner
1884 if(np==2) { // 3rd ladder
1885 nz = (fNdetectors-1) - nz;
1886 }
1887 }
1888 //printf("ndet %d phi %f z %f np %d nz %d\n",fNdetectors,phi,z,np,nz);
1889
1890
1891 return np*fNdetectors + nz;
1892}
1893//------------------------------------------------------------------------
1894const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci,Bool_t test)
1895{
1896 //--------------------------------------------------------------------
1897 // This function returns clusters within the "window"
1898 //--------------------------------------------------------------------
1899
1900 if (fCurrentSlice<0) {
1901 Double_t rpi2 = 2.*fR*TMath::Pi();
1902 for (Int_t i=fI; i<fImax; i++) {
1903 Double_t y = fY[i];
1904 if (fYmax<y) y -= rpi2;
1905 if (fYmin>y) y += rpi2;
1906 if (y<fYmin) continue;
1907 if (y>fYmax) continue;
1908 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1909 ci=i;
1910 if (!test) fI=i+1;
1911 return fClusters[i];
1912 }
1913 } else {
1914 for (Int_t i=fI; i<fImax; i++) {
1915 if (fYcs[i]<fYmin) continue;
1916 if (fYcs[i]>fYmax) continue;
1917 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1918 ci=fClusterIndexCs[i];
1919 if (!test) fI=i+1;
1920 return fClustersCs[i];
1921 }
1922 }
1923 return 0;
1924}
1925//------------------------------------------------------------------------
1926Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1927const {
1928 //--------------------------------------------------------------------
1929 // This function returns the layer thickness at this point (units X0)
1930 //--------------------------------------------------------------------
1931 Double_t d=0.0085;
1932 x0=AliITSRecoParam::GetX0Air();
1933 if (43<fR&&fR<45) { //SSD2
1934 Double_t dd=0.0034;
1935 d=dd;
1936 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1937 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1938 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1939 for (Int_t i=0; i<12; i++) {
1940 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1941 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1942 d+=0.0034;
1943 break;
1944 }
1945 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1946 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1947 d+=0.0034;
1948 break;
1949 }
1950 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1951 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1952 }
1953 } else
1954 if (37<fR&&fR<41) { //SSD1
1955 Double_t dd=0.0034;
1956 d=dd;
1957 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1958 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1959 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1960 for (Int_t i=0; i<11; i++) {
1961 if (TMath::Abs(z-3.9*i)<0.15) {
1962 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1963 d+=dd;
1964 break;
1965 }
1966 if (TMath::Abs(z+3.9*i)<0.15) {
1967 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1968 d+=dd;
1969 break;
1970 }
1971 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1972 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1973 }
1974 } else
1975 if (13<fR&&fR<26) { //SDD
1976 Double_t dd=0.0033;
1977 d=dd;
1978 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1979
1980 if (TMath::Abs(y-1.80)<0.55) {
1981 d+=0.016;
1982 for (Int_t j=0; j<20; j++) {
1983 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1984 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1985 }
1986 }
1987 if (TMath::Abs(y+1.80)<0.55) {
1988 d+=0.016;
1989 for (Int_t j=0; j<20; j++) {
1990 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1991 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1992 }
1993 }
1994
1995 for (Int_t i=0; i<4; i++) {
1996 if (TMath::Abs(z-7.3*i)<0.60) {
1997 d+=dd;
1998 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1999 break;
2000 }
2001 if (TMath::Abs(z+7.3*i)<0.60) {
2002 d+=dd;
2003 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2004 break;
2005 }
2006 }
2007 } else
2008 if (6<fR&&fR<8) { //SPD2
2009 Double_t dd=0.0063; x0=21.5;
2010 d=dd;
2011 if (TMath::Abs(y-3.08)>0.5) d+=dd;
2012 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
2013 } else
2014 if (3<fR&&fR<5) { //SPD1
2015 Double_t dd=0.0063; x0=21.5;
2016 d=dd;
2017 if (TMath::Abs(y+0.21)>0.6) d+=dd;
2018 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
2019 }
2020
2021 return d;
2022}
2023//------------------------------------------------------------------------
2024AliITStrackerMI::AliITSdetector::AliITSdetector(const AliITSdetector& det):
2025fR(det.fR),
2026fRmisal(det.fRmisal),
2027fPhi(det.fPhi),
2028fSinPhi(det.fSinPhi),
2029fCosPhi(det.fCosPhi),
2030fYmin(det.fYmin),
2031fYmax(det.fYmax),
2032fZmin(det.fZmin),
2033fZmax(det.fZmax),
2034fIsBad(det.fIsBad),
2035fNChips(det.fNChips),
2036fChipIsBad(det.fChipIsBad)
2037{
2038 //Copy constructor
2039}
2040//------------------------------------------------------------------------
2041void AliITStrackerMI::AliITSdetector::ReadBadDetectorAndChips(Int_t ilayer,Int_t idet,
2042 const AliITSDetTypeRec *detTypeRec)
2043{
2044 //--------------------------------------------------------------------
2045 // Read bad detectors and chips from calibration objects in AliITSDetTypeRec
2046 //--------------------------------------------------------------------
2047
2048 // In AliITSDetTypeRec, detector numbers go from 0 to 2197
2049 // while in the tracker they start from 0 for each layer
2050 for(Int_t il=0; il<ilayer; il++)
2051 idet += AliITSgeomTGeo::GetNLadders(il+1)*AliITSgeomTGeo::GetNDetectors(il+1);
2052
2053 Int_t detType;
2054 if (ilayer==0 || ilayer==1) { // ---------- SPD
2055 detType = 0;
2056 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
2057 detType = 1;
2058 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
2059 detType = 2;
2060 } else {
2061 printf("AliITStrackerMI::AliITSdetector::InitBadFromOCDB: Wrong layer number %d\n",ilayer);
2062 return;
2063 }
2064
2065 // Get calibration from AliITSDetTypeRec
2066 AliITSCalibration *calib = (AliITSCalibration*)detTypeRec->GetCalibrationModel(idet);
2067 calib->SetModuleIndex(idet);
2068 AliITSCalibration *calibSPDdead = 0;
2069 if(detType==0) calibSPDdead = (AliITSCalibration*)detTypeRec->GetSPDDeadModel(idet); // TEMPORARY
2070 if (calib->IsBad() ||
2071 (detType==0 && calibSPDdead->IsBad())) // TEMPORARY
2072 {
2073 SetBad();
2074 // printf("lay %d bad %d\n",ilayer,idet);
2075 }
2076
2077 // Get segmentation from AliITSDetTypeRec
2078 AliITSsegmentation *segm = (AliITSsegmentation*)detTypeRec->GetSegmentationModel(detType);
2079
2080 // Read info about bad chips
2081 fNChips = segm->GetMaximumChipIndex()+1;
2082 //printf("ilayer %d detType %d idet %d fNChips %d %d GetNumberOfChips %d\n",ilayer,detType,idet,fNChips,segm->GetMaximumChipIndex(),segm->GetNumberOfChips());
2083 if(fChipIsBad) { delete [] fChipIsBad; fChipIsBad=NULL; }
2084 fChipIsBad = new Bool_t[fNChips];
2085 for (Int_t iCh=0;iCh<fNChips;iCh++) {
2086 fChipIsBad[iCh] = calib->IsChipBad(iCh);
2087 if (detType==0 && calibSPDdead->IsChipBad(iCh)) fChipIsBad[iCh] = kTRUE; // TEMPORARY
2088 //if(fChipIsBad[iCh]) {printf("lay %d det %d bad chip %d\n",ilayer,idet,iCh);}
2089 }
2090
2091 return;
2092}
2093//------------------------------------------------------------------------
2094Double_t AliITStrackerMI::GetEffectiveThickness()
2095{
2096 //--------------------------------------------------------------------
2097 // Returns the thickness between the current layer and the vertex (units X0)
2098 //--------------------------------------------------------------------
2099
2100 if(fUseTGeo!=0) {
2101 if(fxOverX0Layer[0]<0) BuildMaterialLUT("Layers");
2102 if(fxOverX0Shield[0]<0) BuildMaterialLUT("Shields");
2103 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
2104 }
2105
2106 // beam pipe
2107 Double_t dPipe = (fUseTGeo==0 ? AliITSRecoParam::GetdPipe() : fxOverX0Pipe);
2108 Double_t d=dPipe*AliITSRecoParam::GetrPipe()*AliITSRecoParam::GetrPipe();
2109
2110 // layers
2111 Double_t x0=0;
2112 Double_t xn=fgLayers[fI].GetR();
2113 for (Int_t i=0; i<fI; i++) {
2114 Double_t xi=fgLayers[i].GetR();
2115 Double_t dLayer = (fUseTGeo==0 ? fgLayers[i].GetThickness(0,0,x0) : fxOverX0Layer[i]);
2116 d+=dLayer*xi*xi;
2117 }
2118
2119 // shields
2120 if (fI>1) {
2121 Double_t dshieldSPD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(0) : fxOverX0Shield[0]);
2122 d+=dshieldSPD*AliITSRecoParam::GetrInsideShield(0)*AliITSRecoParam::GetrInsideShield(0);
2123 }
2124 if (fI>3) {
2125 Double_t dshieldSDD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(1) : fxOverX0Shield[1]);
2126 d+=dshieldSDD*AliITSRecoParam::GetrInsideShield(1)*AliITSRecoParam::GetrInsideShield(1);
2127 }
2128 return d/(xn*xn);
2129}
2130//------------------------------------------------------------------------
2131Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
2132 //-------------------------------------------------------------------
2133 // This function returns number of clusters within the "window"
2134 //--------------------------------------------------------------------
2135 Int_t ncl=0;
2136 for (Int_t i=fI; i<fN; i++) {
2137 const AliITSRecPoint *c=fClusters[i];
2138 if (c->GetZ() > fZmax) break;
2139 if (c->IsUsed()) continue;
2140 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
2141 Double_t y=fR*det.GetPhi() + c->GetY();
2142
2143 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
2144 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
2145
2146 if (y<fYmin) continue;
2147 if (y>fYmax) continue;
2148 ncl++;
2149 }
2150 return ncl;
2151}
2152//------------------------------------------------------------------------
2153Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2154 const AliITStrackMI *clusters,Bool_t extra, Bool_t planeeff)
2155{
2156 //--------------------------------------------------------------------
2157 // This function refits the track "track" at the position "x" using
2158 // the clusters from "clusters"
2159 // If "extra"==kTRUE,
2160 // the clusters from overlapped modules get attached to "track"
2161 // If "planeff"==kTRUE,
2162 // special approach for plane efficiency evaluation is applyed
2163 //--------------------------------------------------------------------
2164
2165 Int_t index[AliITSgeomTGeo::kNLayers];
2166 Int_t k;
2167 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2168 Int_t nc=clusters->GetNumberOfClusters();
2169 for (k=0; k<nc; k++) {
2170 Int_t idx=clusters->GetClusterIndex(k);
2171 Int_t ilayer=(idx&0xf0000000)>>28;
2172 index[ilayer]=idx;
2173 }
2174
2175 return RefitAt(xx,track,index,extra,planeeff); // call the method below
2176}
2177//------------------------------------------------------------------------
2178Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2179 const Int_t *clusters,Bool_t extra, Bool_t planeeff)
2180{
2181 //--------------------------------------------------------------------
2182 // This function refits the track "track" at the position "x" using
2183 // the clusters from array
2184 // If "extra"==kTRUE,
2185 // the clusters from overlapped modules get attached to "track"
2186 // If "planeff"==kTRUE,
2187 // special approach for plane efficiency evaluation is applyed
2188 //--------------------------------------------------------------------
2189 Int_t index[AliITSgeomTGeo::kNLayers];
2190 Int_t k;
2191 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2192 //
2193 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
2194 index[k]=clusters[k];
2195 }
2196
2197 // special for cosmics: check which the innermost layer crossed
2198 // by the track
2199 Int_t innermostlayer=5;
2200 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
2201 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
2202 if(drphi < fgLayers[innermostlayer].GetR()) break;
2203 }
2204 //printf(" drphi %f innermost %d\n",drphi,innermostlayer);
2205
2206 Int_t modstatus=1; // found
2207 Float_t xloc,zloc;
2208 Int_t from, to, step;
2209 if (xx > track->GetX()) {
2210 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
2211 step=+1;
2212 } else {
2213 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
2214 step=-1;
2215 }
2216 TString dir = (step>0 ? "outward" : "inward");
2217
2218 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
2219 AliITSlayer &layer=fgLayers[ilayer];
2220 Double_t r=layer.GetR();
2221 if (step<0 && xx>r) break;
2222
2223 // material between SSD and SDD, SDD and SPD
2224 Double_t hI=ilayer-0.5*step;
2225 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
2226 if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
2227 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
2228 if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
2229
2230
2231 Double_t oldGlobXYZ[3];
2232 if (!track->GetXYZ(oldGlobXYZ)) return kFALSE;
2233
2234 // continue if we are already beyond this layer
2235 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
2236 if(step>0 && oldGlobR > r) continue; // going outward
2237 if(step<0 && oldGlobR < r) continue; // going inward
2238
2239 Double_t phi,z;
2240 if (!track->GetPhiZat(r,phi,z)) return kFALSE;
2241
2242 Int_t idet=layer.FindDetectorIndex(phi,z);
2243
2244 // check if we allow a prolongation without point for large-eta tracks
2245 Int_t skip = CheckSkipLayer(track,ilayer,idet);
2246 if (skip==2) {
2247 modstatus = 4; // out in z
2248 if(LocalModuleCoord(ilayer,idet,track,xloc,zloc)) { // local module coords
2249 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2250 }
2251 // cross layer
2252 // apply correction for material of the current layer
2253 // add time if going outward
2254 CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir);
2255 continue;
2256 }
2257
2258 if (idet<0) return kFALSE;
2259
2260 const AliITSdetector &det=layer.GetDetector(idet);
2261 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
2262
2263 track->SetDetectorIndex(idet);
2264 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2265
2266 Double_t dz,zmin,zmax,dy,ymin,ymax;
2267
2268 const AliITSRecPoint *clAcc=0;
2269 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2270
2271 Int_t idx=index[ilayer];
2272 if (idx>=0) { // cluster in this layer
2273 modstatus = 6; // no refit
2274 const AliITSRecPoint *cl=(AliITSRecPoint *)GetCluster(idx);
2275 if (cl) {
2276 if (idet != cl->GetDetectorIndex()) {
2277 idet=cl->GetDetectorIndex();
2278 const AliITSdetector &detc=layer.GetDetector(idet);
2279 if (!track->Propagate(detc.GetPhi(),detc.GetR())) return kFALSE;
2280 track->SetDetectorIndex(idet);
2281 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2282 }
2283 Int_t cllayer = (idx & 0xf0000000) >> 28;;
2284 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
2285 if (chi2<maxchi2) {
2286 clAcc=cl;
2287 maxchi2=chi2;
2288 modstatus = 1; // found
2289 } else {
2290 return kFALSE; //
2291 }
2292 }
2293 } else { // no cluster in this layer
2294 if (skip==1) {
2295 modstatus = 3; // skipped
2296 // Plane Eff determination:
2297 if (planeeff && ilayer==AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()) {
2298 if (IsOKForPlaneEff(track,clusters,ilayer)) // only adequate track for plane eff. evaluation
2299 UseTrackForPlaneEff(track,ilayer);
2300 }
2301 } else {
2302 modstatus = 5; // no cls in road
2303 // check dead
2304 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2305 dz = 0.5*(zmax-zmin);
2306 dy = 0.5*(ymax-ymin);
2307 Int_t dead = CheckDeadZone(track,ilayer,idet,dz,dy,kTRUE);
2308 if (dead==1) modstatus = 7; // holes in z in SPD
2309 if (dead==2 || dead==3 || dead==4) modstatus = 2; // dead from OCDB
2310 }
2311 }
2312
2313 if (clAcc) {
2314 if (!UpdateMI(track,clAcc,maxchi2,idx)) return kFALSE;
2315 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
2316 }
2317 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2318
2319
2320 if (extra) { // search for extra clusters in overlapped modules
2321 AliITStrackV2 tmp(*track);
2322 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2323 layer.SelectClusters(zmin,zmax,ymin,ymax);
2324
2325 const AliITSRecPoint *clExtra=0; Int_t ci=-1,cci=-1;
2326 Int_t idetExtra=-1;
2327 maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2328 Double_t tolerance=0.1;
2329 while ((clExtra=layer.GetNextCluster(ci))!=0) {
2330 // only clusters in another module! (overlaps)
2331 idetExtra = clExtra->GetDetectorIndex();
2332 if (idet == idetExtra) continue;
2333
2334 const AliITSdetector &detx=layer.GetDetector(idetExtra);
2335
2336 if (!tmp.Propagate(detx.GetPhi(),detx.GetR()+clExtra->GetX())) continue;
2337 if (TMath::Abs(tmp.GetZ() - clExtra->GetZ()) > tolerance) continue;
2338 if (TMath::Abs(tmp.GetY() - clExtra->GetY()) > tolerance) continue;
2339 if (!tmp.Propagate(detx.GetPhi(),detx.GetR())) continue;
2340
2341 Double_t chi2=tmp.GetPredictedChi2(clExtra);
2342 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
2343 }
2344 if (cci>=0) {
2345 track->SetExtraCluster(ilayer,(ilayer<<28)+cci);
2346 track->SetExtraModule(ilayer,idetExtra);
2347 }
2348 } // end search for extra clusters in overlapped modules
2349
2350 // Correct for material of the current layer
2351 // cross material
2352 // add time if going outward
2353 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)) return kFALSE;
2354
2355 } // end loop on layers
2356
2357 if (!track->PropagateTo(xx,0.,0.)) return kFALSE;
2358
2359 return kTRUE;
2360}
2361//------------------------------------------------------------------------
2362Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
2363{
2364 //
2365 // calculate normalized chi2
2366 // return NormalizedChi2(track,0);
2367 Float_t chi2 = 0;
2368 Float_t sum=0;
2369 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2370 // track->fdEdxMismatch=0;
2371 Float_t dedxmismatch =0;
2372 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2373 if (mode<100){
2374 for (Int_t i = 0;i<6;i++){
2375 if (track->GetClIndex(i)>=0){
2376 Float_t cerry, cerrz;
2377 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2378 else
2379 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2380 cerry*=cerry;
2381 cerrz*=cerrz;
2382 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
2383 if (i>1 && AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(i)) {
2384 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
2385 if (ratio<0.5) {
2386 cchi2+=(0.5-ratio)*10.;
2387 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2388 dedxmismatch+=(0.5-ratio)*10.;
2389 }
2390 }
2391 if (i<2 ||i>3){
2392 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
2393 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2394 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2395 if (i<2) chi2+=2*cl->GetDeltaProbability();
2396 }
2397 chi2+=cchi2;
2398 sum++;
2399 }
2400 }
2401 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2402 track->SetdEdxMismatch(dedxmismatch);
2403 }
2404 }
2405 else{
2406 for (Int_t i = 0;i<4;i++){
2407 if (track->GetClIndex(i)>=0){
2408 Float_t cerry, cerrz;
2409 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2410 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2411 cerry*=cerry;
2412 cerrz*=cerrz;
2413 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2414 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
2415 sum++;
2416 }
2417 }
2418 for (Int_t i = 4;i<6;i++){
2419 if (track->GetClIndex(i)>=0){
2420 Float_t cerry, cerrz;
2421 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2422 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2423 cerry*=cerry;
2424 cerrz*=cerrz;
2425 Float_t cerryb, cerrzb;
2426 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
2427 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
2428 cerryb*=cerryb;
2429 cerrzb*=cerrzb;
2430 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2431 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
2432 sum++;
2433 }
2434 }
2435 }
2436 if (track->GetESDtrack()->GetTPCsignal()>85){
2437 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
2438 if (ratio<0.5) {
2439 chi2+=(0.5-ratio)*5.;
2440 }
2441 if (ratio>2){
2442 chi2+=(ratio-2.0)*3;
2443 }
2444 }
2445 //
2446 Double_t match = TMath::Sqrt(track->GetChi22());
2447 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2448 if (!track->GetConstrain()) {
2449 if (track->GetNumberOfClusters()>2) {
2450 match/=track->GetNumberOfClusters()-2.;
2451 } else {
2452 match=0;
2453 }
2454 }
2455 if (match<0) match=0;
2456
2457 // penalty factor for missing points (NDeadZone>0), but no penalty
2458 // for layer with deadZoneProb close to 1 (either we wanted to skip layer
2459 // or there is a dead from OCDB)
2460 Float_t deadzonefactor = 0.;
2461 if (track->GetNDeadZone()>0.) {
2462 Float_t sumDeadZoneProbability=0;
2463 for(Int_t ilay=0;ilay<6;ilay++) sumDeadZoneProbability+=track->GetDeadZoneProbability(ilay);
2464 Float_t nDeadZoneWithProbNot1=(Float_t)(track->GetNDeadZone())-sumDeadZoneProbability;
2465 if(nDeadZoneWithProbNot1>0.) {
2466 Float_t deadZoneProbability = sumDeadZoneProbability - (Float_t)((Int_t)sumDeadZoneProbability);
2467 deadZoneProbability /= nDeadZoneWithProbNot1;
2468 deadzonefactor = 3.*(1.1-deadZoneProbability);
2469 }
2470 }
2471
2472 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2473 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2474 1./(1.+track->GetNSkipped()));
2475
2476 return normchi2;
2477}
2478//------------------------------------------------------------------------
2479Double_t AliITStrackerMI::GetMatchingChi2(const AliITStrackMI * track1,const AliITStrackMI * track2)
2480{
2481 //
2482 // return matching chi2 between two tracks
2483 Double_t largeChi2=1000.;
2484
2485 AliITStrackMI track3(*track2);
2486 if (!track3.Propagate(track1->GetAlpha(),track1->GetX())) return largeChi2;
2487 TMatrixD vec(5,1);
2488 vec(0,0)=track1->GetY() - track3.GetY();
2489 vec(1,0)=track1->GetZ() - track3.GetZ();
2490 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2491 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2492 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
2493 //
2494 TMatrixD cov(5,5);
2495 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2496 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2497 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2498 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2499 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2500
2501 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2502 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2503 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2504 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2505 //
2506 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2507 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2508 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2509 //
2510 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2511 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2512 //
2513 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2514
2515 cov.Invert();
2516 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2517 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2518 return chi2(0,0);
2519}
2520//------------------------------------------------------------------------
2521Double_t AliITStrackerMI::GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr) const
2522{
2523 //
2524 // return probability that given point (characterized by z position and error)
2525 // is in SPD dead zone
2526 //
2527 Double_t probability = 0.;
2528 Double_t absz = TMath::Abs(zpos);
2529 Double_t nearestz = (absz<2.) ? 0.5*(fSPDdetzcentre[1]+fSPDdetzcentre[2]) :
2530 0.5*(fSPDdetzcentre[2]+fSPDdetzcentre[3]);
2531 if (TMath::Abs(absz-nearestz)>0.25+3.*zerr) return probability;
2532 Double_t zmin, zmax;
2533 if (zpos<-6.) { // dead zone at z = -7
2534 zmin = fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2535 zmax = fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2536 } else if (zpos>6.) { // dead zone at z = +7
2537 zmin = fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2538 zmax = fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2539 } else if (absz<2.) { // dead zone at z = 0
2540 zmin = fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2541 zmax = fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2542 } else {
2543 zmin = 0.;
2544 zmax = 0.;
2545 }
2546 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2547 // dead zone)
2548 probability = 0.5*( TMath::Erf((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2549 TMath::Erf((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
2550 return probability;
2551}
2552//------------------------------------------------------------------------
2553Double_t AliITStrackerMI::GetTruncatedChi2(const AliITStrackMI * track, Float_t fac)
2554{
2555 //
2556 // calculate normalized chi2
2557 Float_t chi2[6];
2558 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2559 Float_t ncl = 0;
2560 for (Int_t i = 0;i<6;i++){
2561 if (TMath::Abs(track->GetDy(i))>0){
2562 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2563 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2564 ncl++;
2565 }
2566 else{chi2[i]=10000;}
2567 }
2568 Int_t index[6];
2569 TMath::Sort(6,chi2,index,kFALSE);
2570 Float_t max = float(ncl)*fac-1.;
2571 Float_t sumchi=0, sumweight=0;
2572 for (Int_t i=0;i<max+1;i++){
2573 Float_t weight = (i<max)?1.:(max+1.-i);
2574 sumchi+=weight*chi2[index[i]];
2575 sumweight+=weight;
2576 }
2577 Double_t normchi2 = sumchi/sumweight;
2578 return normchi2;
2579}
2580//------------------------------------------------------------------------
2581Double_t AliITStrackerMI::GetInterpolatedChi2(const AliITStrackMI * forwardtrack,const AliITStrackMI * backtrack)
2582{
2583 //
2584 // calculate normalized chi2
2585 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2586 Int_t npoints = 0;
2587 Double_t res =0;
2588 for (Int_t i=0;i<6;i++){
2589 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2590 Double_t sy1 = forwardtrack->GetSigmaY(i);
2591 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2592 Double_t sy2 = backtrack->GetSigmaY(i);
2593 Double_t sz2 = backtrack->GetSigmaZ(i);
2594 if (i<2){ sy2=1000.;sz2=1000;}
2595 //
2596 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2597 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2598 //
2599 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2600 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2601 //
2602 res+= nz0*nz0+ny0*ny0;
2603 npoints++;
2604 }
2605 if (npoints>1) return
2606 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
2607 //2*forwardtrack->fNUsed+
2608 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2609 1./(1.+forwardtrack->GetNSkipped()));
2610 return 1000;
2611}
2612//------------------------------------------------------------------------
2613Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2614 //--------------------------------------------------------------------
2615 // Return pointer to a given cluster
2616 //--------------------------------------------------------------------
2617 Int_t l=(index & 0xf0000000) >> 28;
2618 Int_t c=(index & 0x0fffffff) >> 00;
2619 return fgLayers[l].GetWeight(c);
2620}
2621//------------------------------------------------------------------------
2622void AliITStrackerMI::RegisterClusterTracks(const AliITStrackMI* track,Int_t id)
2623{
2624 //---------------------------------------------
2625 // register track to the list
2626 //
2627 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2628 //
2629 //
2630 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2631 Int_t index = track->GetClusterIndex(icluster);
2632 Int_t l=(index & 0xf0000000) >> 28;
2633 Int_t c=(index & 0x0fffffff) >> 00;
2634 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2635 for (Int_t itrack=0;itrack<4;itrack++){
2636 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2637 fgLayers[l].SetClusterTracks(itrack,c,id);
2638 break;
2639 }
2640 }
2641 }
2642}
2643//------------------------------------------------------------------------
2644void AliITStrackerMI::UnRegisterClusterTracks(const AliITStrackMI* track, Int_t id)
2645{
2646 //---------------------------------------------
2647 // unregister track from the list
2648 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2649 Int_t index = track->GetClusterIndex(icluster);
2650 Int_t l=(index & 0xf0000000) >> 28;
2651 Int_t c=(index & 0x0fffffff) >> 00;
2652 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2653 for (Int_t itrack=0;itrack<4;itrack++){
2654 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2655 fgLayers[l].SetClusterTracks(itrack,c,-1);
2656 }
2657 }
2658 }
2659}
2660//------------------------------------------------------------------------
2661Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2662{
2663 //-------------------------------------------------------------
2664 //get number of shared clusters
2665 //-------------------------------------------------------------
2666 Float_t shared=0;
2667 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2668 // mean number of clusters
2669 Float_t *ny = GetNy(id), *nz = GetNz(id);
2670
2671
2672 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2673 Int_t index = track->GetClusterIndex(icluster);
2674 Int_t l=(index & 0xf0000000) >> 28;
2675 Int_t c=(index & 0x0fffffff) >> 00;
2676 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2677 if (ny[l]==0){
2678 printf("problem\n");
2679 }
2680 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2681 Float_t weight=1;
2682 //
2683 Float_t deltan = 0;
2684 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2685 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2686 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2687 if (l<2 || l>3){
2688 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2689 }
2690 else{
2691 deltan = (cl->GetNz()-nz[l]);
2692 }
2693 if (deltan>2.0) continue; // extended - highly probable shared cluster
2694 weight = 2./TMath::Max(3.+deltan,2.);
2695 //
2696 for (Int_t itrack=0;itrack<4;itrack++){
2697 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2698 list[l]=index;
2699 clist[l] = (AliITSRecPoint*)GetCluster(index);
2700 shared+=weight;
2701 break;
2702 }
2703 }
2704 }
2705 track->SetNUsed(shared);
2706 return shared;
2707}
2708//------------------------------------------------------------------------
2709Int_t AliITStrackerMI::GetOverlapTrack(const AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2710{
2711 //
2712 // find first shared track
2713 //
2714 // mean number of clusters
2715 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2716 //
2717 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2718 Int_t sharedtrack=100000;
2719 Int_t tracks[24],trackindex=0;
2720 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2721 //
2722 for (Int_t icluster=0;icluster<6;icluster++){
2723 if (clusterlist[icluster]<0) continue;
2724 Int_t index = clusterlist[icluster];
2725 Int_t l=(index & 0xf0000000) >> 28;
2726 Int_t c=(index & 0x0fffffff) >> 00;
2727 if (ny[l]==0){
2728 printf("problem\n");
2729 }
2730 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2731 //if (l>3) continue;
2732 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2733 //
2734 Float_t deltan = 0;
2735 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2736 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2737 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2738 if (l<2 || l>3){
2739 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2740 }
2741 else{
2742 deltan = (cl->GetNz()-nz[l]);
2743 }
2744 if (deltan>2.0) continue; // extended - highly probable shared cluster
2745 //
2746 for (Int_t itrack=3;itrack>=0;itrack--){
2747 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2748 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2749 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2750 trackindex++;
2751 }
2752 }
2753 }
2754 if (trackindex==0) return -1;
2755 if (trackindex==1){
2756 sharedtrack = tracks[0];
2757 }else{
2758 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2759 else{
2760 //
2761 Int_t tracks2[24], cluster[24];
2762 for (Int_t i=0;i<trackindex;i++){ tracks2[i]=-1; cluster[i]=0;}
2763 Int_t index =0;
2764 //
2765 for (Int_t i=0;i<trackindex;i++){
2766 if (tracks[i]<0) continue;
2767 tracks2[index] = tracks[i];
2768 cluster[index]++;
2769 for (Int_t j=i+1;j<trackindex;j++){
2770 if (tracks[j]<0) continue;
2771 if (tracks[j]==tracks[i]){
2772 cluster[index]++;
2773 tracks[j]=-1;
2774 }
2775 }
2776 index++;
2777 }
2778 Int_t max=0;
2779 for (Int_t i=0;i<index;i++){
2780 if (cluster[index]>max) {
2781 sharedtrack=tracks2[index];
2782 max=cluster[index];
2783 }
2784 }
2785 }
2786 }
2787
2788 if (sharedtrack>=100000) return -1;
2789 //
2790 // make list of overlaps
2791 shared =0;
2792 for (Int_t icluster=0;icluster<6;icluster++){
2793 if (clusterlist[icluster]<0) continue;
2794 Int_t index = clusterlist[icluster];
2795 Int_t l=(index & 0xf0000000) >> 28;
2796 Int_t c=(index & 0x0fffffff) >> 00;
2797 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2798 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2799 if (l==0 || l==1){
2800 if (cl->GetNy()>2) continue;
2801 if (cl->GetNz()>2) continue;
2802 }
2803 if (l==4 || l==5){
2804 if (cl->GetNy()>3) continue;
2805 if (cl->GetNz()>3) continue;
2806 }
2807 //
2808 for (Int_t itrack=3;itrack>=0;itrack--){
2809 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2810 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
2811 overlist[l]=index;
2812 shared++;
2813 }
2814 }
2815 }
2816 return sharedtrack;
2817}
2818//------------------------------------------------------------------------
2819AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2820 //
2821 // try to find track hypothesys without conflicts
2822 // with minimal chi2;
2823 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2824 Int_t entries1 = arr1->GetEntriesFast();
2825 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2826 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2827 Int_t entries2 = arr2->GetEntriesFast();
2828 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2829 //
2830 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2831 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2832 if (track10->Pt()>0.5+track20->Pt()) return track10;
2833
2834 for (Int_t itrack=0;itrack<entries1;itrack++){
2835 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2836 UnRegisterClusterTracks(track,trackID1);
2837 }
2838 //
2839 for (Int_t itrack=0;itrack<entries2;itrack++){
2840 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2841 UnRegisterClusterTracks(track,trackID2);
2842 }
2843 Int_t index1=0;
2844 Int_t index2=0;
2845 Float_t maxconflicts=6;
2846 Double_t maxchi2 =1000.;
2847 //
2848 // get weight of hypothesys - using best hypothesy
2849 Double_t w1,w2;
2850
2851 Int_t list1[6],list2[6];
2852 AliITSRecPoint *clist1[6], *clist2[6] ;
2853 RegisterClusterTracks(track10,trackID1);
2854 RegisterClusterTracks(track20,trackID2);
2855 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2856 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2857 UnRegisterClusterTracks(track10,trackID1);
2858 UnRegisterClusterTracks(track20,trackID2);
2859 //
2860 // normalized chi2
2861 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2862 Float_t nerry[6],nerrz[6];
2863 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2864 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2865 for (Int_t i=0;i<6;i++){
2866 if ( (erry1[i]>0) && (erry2[i]>0)) {
2867 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2868 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2869 }else{
2870 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2871 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2872 }
2873 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2874 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2875 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
2876 ncl1++;
2877 }
2878 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2879 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2880 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
2881 ncl2++;
2882 }
2883 }
2884 chi21/=ncl1;
2885 chi22/=ncl2;
2886 //
2887 //
2888 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2889 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
2890 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2891 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2892 //
2893 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2894 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
2895 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
2896 );
2897 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2898 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
2899 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
2900 );
2901
2902 Double_t sumw = w1+w2;
2903 w1/=sumw;
2904 w2/=sumw;
2905 if (w1<w2*0.5) {
2906 w1 = (d2+0.5)/(d1+d2+1.);
2907 w2 = (d1+0.5)/(d1+d2+1.);
2908 }
2909 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2910 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2911 //
2912 // get pair of "best" hypothesys
2913 //
2914 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2915 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2916
2917 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
2918 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
2919 //if (track1->fFakeRatio>0) continue;
2920 RegisterClusterTracks(track1,trackID1);
2921 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
2922 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
2923
2924 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2925 //if (track2->fFakeRatio>0) continue;
2926 Float_t nskipped=0;
2927 RegisterClusterTracks(track2,trackID2);
2928 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2929 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2930 UnRegisterClusterTracks(track2,trackID2);
2931 //
2932 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2933 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
2934 if (nskipped>0.5) continue;
2935 //
2936 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2937 if (conflict1+1<cconflict1) continue;
2938 if (conflict2+1<cconflict2) continue;
2939 Float_t conflict=0;
2940 Float_t sumchi2=0;
2941 Float_t sum=0;
2942 for (Int_t i=0;i<6;i++){
2943 //
2944 Float_t c1 =0.; // conflict coeficients
2945 Float_t c2 =0.;
2946 if (clist1[i]&&clist2[i]){
2947 Float_t deltan = 0;
2948 if (i<2 || i>3){
2949 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2950 }
2951 else{
2952 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2953 }
2954 c1 = 2./TMath::Max(3.+deltan,2.);
2955 c2 = 2./TMath::Max(3.+deltan,2.);
2956 }
2957 else{
2958 if (clist1[i]){
2959 Float_t deltan = 0;
2960 if (i<2 || i>3){
2961 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2962 }
2963 else{
2964 deltan = (clist1[i]->GetNz()-nz1[i]);
2965 }
2966 c1 = 2./TMath::Max(3.+deltan,2.);
2967 c2 = 0;
2968 }
2969
2970 if (clist2[i]){
2971 Float_t deltan = 0;
2972 if (i<2 || i>3){
2973 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2974 }
2975 else{
2976 deltan = (clist2[i]->GetNz()-nz2[i]);
2977 }
2978 c2 = 2./TMath::Max(3.+deltan,2.);
2979 c1 = 0;
2980 }
2981 }
2982 //
2983 chi21=0;chi22=0;
2984 if (TMath::Abs(track1->GetDy(i))>0.) {
2985 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2986 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
2987 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
2988 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
2989 }else{
2990 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
2991 }
2992 //
2993 if (TMath::Abs(track2->GetDy(i))>0.) {
2994 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2995 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
2996 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2997 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2998 }
2999 else{
3000 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
3001 }
3002 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
3003 if (chi21>0) sum+=w1;
3004 if (chi22>0) sum+=w2;
3005 conflict+=(c1+c2);
3006 }
3007 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
3008 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
3009 Double_t normchi2 = 2*conflict+sumchi2/sum;
3010 if ( normchi2 <maxchi2 ){
3011 index1 = itrack1;
3012 index2 = itrack2;
3013 maxconflicts = conflict;
3014 maxchi2 = normchi2;
3015 }
3016 }
3017 UnRegisterClusterTracks(track1,trackID1);
3018 }
3019 //
3020 // if (maxconflicts<4 && maxchi2<th0){
3021 if (maxchi2<th0*2.){
3022 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
3023 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
3024 track1->SetChi2MIP(5,maxconflicts);
3025 track1->SetChi2MIP(6,maxchi2);
3026 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
3027 // track1->UpdateESDtrack(AliESDtrack::kITSin);
3028 track1->SetChi2MIP(8,index1);
3029 fBestTrackIndex[trackID1] =index1;
3030 UpdateESDtrack(track1, AliESDtrack::kITSin);
3031 }
3032 else if (track10->GetChi2MIP(0)<th1){
3033 track10->SetChi2MIP(5,maxconflicts);
3034 track10->SetChi2MIP(6,maxchi2);
3035 // track10->UpdateESDtrack(AliESDtrack::kITSin);
3036 UpdateESDtrack(track10,AliESDtrack::kITSin);
3037 }
3038
3039 for (Int_t itrack=0;itrack<entries1;itrack++){
3040 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
3041 UnRegisterClusterTracks(track,trackID1);
3042 }
3043 //
3044 for (Int_t itrack=0;itrack<entries2;itrack++){
3045 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
3046 UnRegisterClusterTracks(track,trackID2);
3047 }
3048
3049 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3050 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3051 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3052 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3053 RegisterClusterTracks(track10,trackID1);
3054 }
3055 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3056 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3057 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3058 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3059 RegisterClusterTracks(track20,trackID2);
3060 }
3061 return track10;
3062
3063}
3064//------------------------------------------------------------------------
3065void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
3066 //--------------------------------------------------------------------
3067 // This function marks clusters assigned to the track
3068 //--------------------------------------------------------------------
3069 AliTracker::UseClusters(t,from);
3070
3071 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
3072 //if (c->GetQ()>2) c->Use();
3073 if (c->GetSigmaZ2()>0.1) c->Use();
3074 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
3075 //if (c->GetQ()>2) c->Use();
3076 if (c->GetSigmaZ2()>0.1) c->Use();
3077
3078}
3079//------------------------------------------------------------------------
3080void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
3081{
3082 //------------------------------------------------------------------
3083 // add track to the list of hypothesys
3084 //------------------------------------------------------------------
3085
3086 if (esdindex>=fTrackHypothesys.GetEntriesFast())
3087 fTrackHypothesys.Expand(TMath::Max(fTrackHypothesys.GetSize(),esdindex*2+10));
3088 //
3089 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3090 if (!array) {
3091 array = new TObjArray(10);
3092 fTrackHypothesys.AddAt(array,esdindex);
3093 }
3094 array->AddLast(track);
3095}
3096//------------------------------------------------------------------------
3097void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
3098{
3099 //-------------------------------------------------------------------
3100 // compress array of track hypothesys
3101 // keep only maxsize best hypothesys
3102 //-------------------------------------------------------------------
3103 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
3104 if (! (fTrackHypothesys.At(esdindex)) ) return;
3105 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3106 Int_t entries = array->GetEntriesFast();
3107 //
3108 //- find preliminary besttrack as a reference
3109 Float_t minchi2=10000;
3110 Int_t maxn=0;
3111 AliITStrackMI * besttrack=0;
3112 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
3113 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3114 if (!track) continue;
3115 Float_t chi2 = NormalizedChi2(track,0);
3116 //
3117 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
3118 track->SetLabel(tpcLabel);
3119 CookdEdx(track);
3120 track->SetFakeRatio(1.);
3121 CookLabel(track,0.); //For comparison only
3122 //
3123 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
3124 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3125 if (track->GetNumberOfClusters()<maxn) continue;
3126 maxn = track->GetNumberOfClusters();
3127 if (chi2<minchi2){
3128 minchi2=chi2;
3129 besttrack=track;
3130 }
3131 }
3132 else{
3133 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3134 delete array->RemoveAt(itrack);
3135 }
3136 }
3137 }
3138 if (!besttrack) return;
3139 //
3140 //
3141 //take errors of best track as a reference
3142 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
3143 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3144 for (Int_t j=0;j<6;j++) {
3145 if (besttrack->GetClIndex(j)>=0){
3146 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3147 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3148 ny[j] = besttrack->GetNy(j);
3149 nz[j] = besttrack->GetNz(j);
3150 }
3151 }
3152 //
3153 // calculate normalized chi2
3154 //
3155 Float_t * chi2 = new Float_t[entries];
3156 Int_t * index = new Int_t[entries];
3157 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3158 for (Int_t itrack=0;itrack<entries;itrack++){
3159 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3160 if (track){
3161 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
3162 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3163 chi2[itrack] = track->GetChi2MIP(0);
3164 else{
3165 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3166 delete array->RemoveAt(itrack);
3167 }
3168 }
3169 }
3170 }
3171 //
3172 TMath::Sort(entries,chi2,index,kFALSE);
3173 besttrack = (AliITStrackMI*)array->At(index[0]);
3174 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3175 for (Int_t j=0;j<6;j++){
3176 if (besttrack->GetClIndex(j)>=0){
3177 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3178 errz[j] = besttrack->GetSigmaZ(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3179 ny[j] = besttrack->GetNy(j);
3180 nz[j] = besttrack->GetNz(j);
3181 }
3182 }
3183 }
3184 //
3185 // calculate one more time with updated normalized errors
3186 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3187 for (Int_t itrack=0;itrack<entries;itrack++){
3188 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3189 if (track){
3190 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3191 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3192 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
3193 else
3194 {
3195 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3196 delete array->RemoveAt(itrack);
3197 }
3198 }
3199 }
3200 }
3201 entries = array->GetEntriesFast();
3202 //
3203 //
3204 if (entries>0){
3205 TObjArray * newarray = new TObjArray();
3206 TMath::Sort(entries,chi2,index,kFALSE);
3207 besttrack = (AliITStrackMI*)array->At(index[0]);
3208 if (besttrack){
3209 //
3210 for (Int_t j=0;j<6;j++){
3211 if (besttrack->GetNz(j)>0&&besttrack->GetNy(j)>0){
3212 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3213 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3214 ny[j] = besttrack->GetNy(j);
3215 nz[j] = besttrack->GetNz(j);
3216 }
3217 }
3218 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
3219 minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
3220 Float_t minn = besttrack->GetNumberOfClusters()-3;
3221 Int_t accepted=0;
3222 for (Int_t i=0;i<entries;i++){
3223 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
3224 if (!track) continue;
3225 if (accepted>maxcut) break;
3226 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3227 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3228 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
3229 delete array->RemoveAt(index[i]);
3230 continue;
3231 }
3232 }
3233 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
3234 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
3235 if (!shortbest) accepted++;
3236 //
3237 newarray->AddLast(array->RemoveAt(index[i]));
3238 for (Int_t j=0;j<6;j++){
3239 if (nz[j]==0){
3240 erry[j] = track->GetSigmaY(j); erry[j+6] = track->GetSigmaY(j+6);
3241 errz[j] = track->GetSigmaZ(j); errz[j] = track->GetSigmaZ(j+6);
3242 ny[j] = track->GetNy(j);
3243 nz[j] = track->GetNz(j);
3244 }
3245 }
3246 }
3247 else{
3248 delete array->RemoveAt(index[i]);
3249 }
3250 }
3251 array->Delete();
3252 delete fTrackHypothesys.RemoveAt(esdindex);
3253 fTrackHypothesys.AddAt(newarray,esdindex);
3254 }
3255 else{
3256 array->Delete();
3257 delete fTrackHypothesys.RemoveAt(esdindex);
3258 }
3259 }
3260 delete [] chi2;
3261 delete [] index;
3262}
3263//------------------------------------------------------------------------
3264AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
3265{
3266 //-------------------------------------------------------------
3267 // try to find best hypothesy
3268 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
3269 //-------------------------------------------------------------
3270 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
3271 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3272 if (!array) return 0;
3273 Int_t entries = array->GetEntriesFast();
3274 if (!entries) return 0;
3275 Float_t minchi2 = 100000;
3276 AliITStrackMI * besttrack=0;
3277 //
3278 AliITStrackMI * backtrack = new AliITStrackMI(*original);
3279 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
3280 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
3281 Double_t ersVtx[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
3282 //
3283 for (Int_t i=0;i<entries;i++){
3284 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3285 if (!track) continue;
3286 Float_t sigmarfi,sigmaz;
3287 GetDCASigma(track,sigmarfi,sigmaz);
3288 track->SetDnorm(0,sigmarfi);
3289 track->SetDnorm(1,sigmaz);
3290 //
3291 track->SetChi2MIP(1,1000000);
3292 track->SetChi2MIP(2,1000000);
3293 track->SetChi2MIP(3,1000000);
3294 //
3295 // backtrack
3296 backtrack = new(backtrack) AliITStrackMI(*track);
3297 if (track->GetConstrain()) {
3298 if (!CorrectForPipeMaterial(backtrack,"inward")) continue;
3299 if (!backtrack->Improve(0,xyzVtx,ersVtx)) continue;
3300 backtrack->ResetCovariance(10.);
3301 }else{
3302 backtrack->ResetCovariance(10.);
3303 }
3304 backtrack->ResetClusters();
3305
3306 Double_t x = original->GetX();
3307 if (!RefitAt(x,backtrack,track)) continue;
3308 //
3309 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
3310 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
3311 if (track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)*6.) continue;
3312 track->SetChi22(GetMatchingChi2(backtrack,original));
3313
3314 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
3315 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
3316 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
3317
3318
3319 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)) continue;
3320 //
3321 //forward track - without constraint
3322 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
3323 forwardtrack->ResetClusters();
3324 x = track->GetX();
3325 RefitAt(x,forwardtrack,track);
3326 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
3327 if (track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)*6.0) continue;
3328 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)) continue;
3329
3330 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
3331 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3332 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
3333 forwardtrack->SetD(0,track->GetD(0));
3334 forwardtrack->SetD(1,track->GetD(1));
3335 {
3336 Int_t list[6];
3337 AliITSRecPoint* clist[6];
3338 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
3339 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
3340 }
3341
3342 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
3343 if ( (track->GetChi2MIP(3)>6.*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) continue;
3344 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) {
3345 track->SetChi2MIP(3,1000);
3346 continue;
3347 }
3348 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
3349 //
3350 for (Int_t ichi=0;ichi<5;ichi++){
3351 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
3352 }
3353 if (chi2 < minchi2){
3354 //besttrack = new AliITStrackMI(*forwardtrack);
3355 besttrack = track;
3356 besttrack->SetLabel(track->GetLabel());
3357 besttrack->SetFakeRatio(track->GetFakeRatio());
3358 minchi2 = chi2;
3359 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
3360 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3361 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
3362 }
3363 }
3364 delete backtrack;
3365 delete forwardtrack;
3366 Int_t accepted=0;
3367 for (Int_t i=0;i<entries;i++){
3368 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3369
3370 if (!track) continue;
3371
3372 if (accepted>checkmax || track->GetChi2MIP(3)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)*6. ||
3373 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
3374 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
3375 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3376 delete array->RemoveAt(i);
3377 continue;
3378 }
3379 }
3380 else{
3381 accepted++;
3382 }
3383 }
3384 //
3385 array->Compress();
3386 SortTrackHypothesys(esdindex,checkmax,1);
3387
3388 array = (TObjArray*) fTrackHypothesys.At(esdindex);
3389 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
3390 besttrack = (AliITStrackMI*)array->At(0);
3391 if (!besttrack) return 0;
3392 besttrack->SetChi2MIP(8,0);
3393 fBestTrackIndex[esdindex]=0;
3394 entries = array->GetEntriesFast();
3395 AliITStrackMI *longtrack =0;
3396 minchi2 =1000;
3397 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
3398 for (Int_t itrack=entries-1;itrack>0;itrack--) {
3399 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3400 if (!track->GetConstrain()) continue;
3401 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3402 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
3403 if (track->GetChi2MIP(0)>4.) continue;
3404 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
3405 longtrack =track;
3406 }
3407 //if (longtrack) besttrack=longtrack;
3408
3409 Int_t list[6];
3410 AliITSRecPoint * clist[6];
3411 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3412 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&besttrack->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3413 &&besttrack->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&besttrack->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3414 RegisterClusterTracks(besttrack,esdindex);
3415 }
3416 //
3417 //
3418 if (shared>0.0){
3419 Int_t nshared;
3420 Int_t overlist[6];
3421 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
3422 if (sharedtrack>=0){
3423 //
3424 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
3425 if (besttrack){
3426 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3427 }
3428 else return 0;
3429 }
3430 }
3431
3432 if (shared>2.5) return 0;
3433 if (shared>1.0) return besttrack;
3434 //
3435 // Don't sign clusters if not gold track
3436 //
3437 if (!besttrack->IsGoldPrimary()) return besttrack;
3438 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
3439 //
3440 if (fConstraint[fPass]){
3441 //
3442 // sign clusters
3443 //
3444 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3445 for (Int_t i=0;i<6;i++){
3446 Int_t index = besttrack->GetClIndex(i);
3447 if (index<0) continue;
3448 Int_t ilayer = (index & 0xf0000000) >> 28;
3449 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
3450 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
3451 if (!c) continue;
3452 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3453 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3454 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
3455 if ( ilayer>2&& AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(ilayer))
3456 if (besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
3457 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3458
3459 Bool_t cansign = kTRUE;
3460 for (Int_t itrack=0;itrack<entries; itrack++){
3461 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3462 if (!track) continue;
3463 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3464 if ( (track->GetClIndex(ilayer)>=0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
3465 cansign = kFALSE;
3466 break;
3467 }
3468 }
3469 if (cansign){
3470 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3471 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
3472 if (!c->IsUsed()) c->Use();
3473 }
3474 }
3475 }
3476 return besttrack;
3477}
3478//------------------------------------------------------------------------
3479void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3480{
3481 //
3482 // get "best" hypothesys
3483 //
3484
3485 Int_t nentries = itsTracks.GetEntriesFast();
3486 for (Int_t i=0;i<nentries;i++){
3487 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3488 if (!track) continue;
3489 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3490 if (!array) continue;
3491 if (array->GetEntriesFast()<=0) continue;
3492 //
3493 AliITStrackMI* longtrack=0;
3494 Float_t minn=0;
3495 Float_t maxchi2=1000;
3496 for (Int_t j=0;j<array->GetEntriesFast();j++){
3497 AliITStrackMI* trackHyp = (AliITStrackMI*)array->At(j);
3498 if (!trackHyp) continue;
3499 if (trackHyp->GetGoldV0()) {
3500 longtrack = trackHyp; //gold V0 track taken
3501 break;
3502 }
3503 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()<minn) continue;
3504 Float_t chi2 = trackHyp->GetChi2MIP(0);
3505 if (fAfterV0){
3506 if (!trackHyp->GetGoldV0()&&trackHyp->GetConstrain()==kFALSE) chi2+=5;
3507 }
3508 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()>minn) maxchi2 = trackHyp->GetChi2MIP(0);
3509 //
3510 if (chi2 > maxchi2) continue;
3511 minn= trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone();
3512 maxchi2 = chi2;
3513 longtrack=trackHyp;
3514 }
3515 //
3516 //
3517 //
3518 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3519 if (!longtrack) {longtrack = besttrack;}
3520 else besttrack= longtrack;
3521 //
3522 if (besttrack) {
3523 Int_t list[6];
3524 AliITSRecPoint * clist[6];
3525 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3526 //
3527 track->SetNUsed(shared);
3528 track->SetNSkipped(besttrack->GetNSkipped());
3529 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3530 if (shared>0) {
3531 if(!AliITSReconstructor::GetRecoParam()->GetAllowSharedClusters()) continue;
3532 Int_t nshared;
3533 Int_t overlist[6];
3534 //
3535 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3536 //if (sharedtrack==-1) sharedtrack=0;
3537 if (sharedtrack>=0) {
3538 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3539 }
3540 }
3541 if (besttrack&&fAfterV0) {
3542 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3543 }
3544 if (besttrack&&fConstraint[fPass])
3545 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3546 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5 && fConstraint[fPass]) {
3547 if ( TMath::Abs(besttrack->GetD(0))>0.1 ||
3548 TMath::Abs(besttrack->GetD(1))>0.1 ) track->SetReconstructed(kFALSE);
3549 }
3550
3551 }
3552 }
3553}
3554//------------------------------------------------------------------------
3555void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3556 //--------------------------------------------------------------------
3557 //This function "cooks" a track label. If label<0, this track is fake.
3558 //--------------------------------------------------------------------
3559 Int_t tpcLabel=-1;
3560
3561 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3562
3563 track->SetChi2MIP(9,0);
3564 Int_t nwrong=0;
3565 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3566 Int_t cindex = track->GetClusterIndex(i);
3567 Int_t l=(cindex & 0xf0000000) >> 28;
3568 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3569 Int_t isWrong=1;
3570 for (Int_t ind=0;ind<3;ind++){
3571 if (tpcLabel>0)
3572 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3573 AliDebug(2,Form("icl %d ilab %d lab %d",i,ind,cl->GetLabel(ind)));
3574 }
3575 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3576 nwrong+=isWrong;
3577 }
3578 Int_t nclusters = track->GetNumberOfClusters();
3579 if (nclusters > 0) //PH Some tracks don't have any cluster
3580 track->SetFakeRatio(double(nwrong)/double(nclusters));
3581 if (tpcLabel>0){
3582 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
3583 else
3584 track->SetLabel(tpcLabel);
3585 }
3586 AliDebug(2,Form(" nls %d wrong %d label %d tpcLabel %d\n",nclusters,nwrong,track->GetLabel(),tpcLabel));
3587
3588}
3589//------------------------------------------------------------------------
3590void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
3591{
3592 //
3593 track->SetChi2MIP(9,0);
3594 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3595 Int_t cindex = track->GetClusterIndex(i);
3596 Int_t l=(cindex & 0xf0000000) >> 28;
3597 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3598 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3599 Int_t isWrong=1;
3600 for (Int_t ind=0;ind<3;ind++){
3601 if (cl->GetLabel(ind)==lab) isWrong=0;
3602 }
3603 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3604 }
3605 Double_t low=0.;
3606 Double_t up=0.51;
3607 track->CookdEdx(low,up);
3608}
3609//------------------------------------------------------------------------
3610void AliITStrackerMI::MakeCoefficients(Int_t ntracks){
3611 //
3612 // Create some arrays
3613 //
3614 if (fCoefficients) delete []fCoefficients;
3615 fCoefficients = new Float_t[ntracks*48];
3616 for (Int_t i=0;i<ntracks*48;i++) fCoefficients[i]=-1.;
3617}
3618//------------------------------------------------------------------------
3619Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3620{
3621 //
3622 // Compute predicted chi2
3623 //
3624 Float_t erry,errz;
3625 Float_t theta = track->GetTgl();
3626 Float_t phi = track->GetSnp();
3627 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
3628 AliITSClusterParam::GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
3629 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()));
3630 // Take into account the mis-alignment (bring track to cluster plane)
3631 Double_t xTrOrig=track->GetX();
3632 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
3633 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()));
3634 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3635 // Bring the track back to detector plane in ideal geometry
3636 // [mis-alignment will be accounted for in UpdateMI()]
3637 if (!track->Propagate(xTrOrig)) return 1000.;
3638 Float_t ny,nz;
3639 AliITSClusterParam::GetNTeor(layer,cluster,theta,phi,ny,nz);
3640 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3641 if (delta>1){
3642 chi2+=0.5*TMath::Min(delta/2,2.);
3643 chi2+=2.*cluster->GetDeltaProbability();
3644 }
3645 //
3646 track->SetNy(layer,ny);
3647 track->SetNz(layer,nz);
3648 track->SetSigmaY(layer,erry);
3649 track->SetSigmaZ(layer, errz);
3650 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3651 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
3652 return chi2;
3653
3654}
3655//------------------------------------------------------------------------
3656Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3657{
3658 //
3659 // Update ITS track
3660 //
3661 Int_t layer = (index & 0xf0000000) >> 28;
3662 track->SetClIndex(layer, index);
3663 if (layer>1&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(layer)) {
3664 if (track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3665 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3666 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3667 }
3668 }
3669
3670 if (cl->GetQ()<=0) return 0; // ingore the "virtual" clusters
3671
3672
3673 // Take into account the mis-alignment (bring track to cluster plane)
3674 Double_t xTrOrig=track->GetX();
3675 Float_t clxyz[3]; cl->GetGlobalXYZ(clxyz);Double_t trxyz[3]; track->GetXYZ(trxyz);
3676 AliDebug(2,Form("gtr %f %f %f",trxyz[0],trxyz[1],trxyz[2]));
3677 AliDebug(2,Form("gcl %f %f %f",clxyz[0],clxyz[1],clxyz[2]));
3678 AliDebug(2,Form(" xtr %f xcl %f",track->GetX(),cl->GetX()));
3679
3680 if (!track->Propagate(xTrOrig+cl->GetX())) return 0;
3681
3682
3683 AliCluster c(*cl);
3684 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
3685 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
3686
3687
3688 Int_t updated = track->UpdateMI(&c,chi2,index);
3689
3690 // Bring the track back to detector plane in ideal geometry
3691 if (!track->Propagate(xTrOrig)) return 0;
3692
3693 if(!updated) AliDebug(2,"update failed");
3694 return updated;
3695}
3696
3697//------------------------------------------------------------------------
3698void AliITStrackerMI::GetDCASigma(const AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3699{
3700 //
3701 //DCA sigmas parameterization
3702 //to be paramterized using external parameters in future
3703 //
3704 //
3705 sigmarfi = 0.0040+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3706 sigmaz = 0.0110+4.37*TMath::Abs(track->GetC());
3707}
3708//------------------------------------------------------------------------
3709void AliITStrackerMI::SignDeltas(const TObjArray *clusterArray, Float_t vz)
3710{
3711 //
3712 // Clusters from delta electrons?
3713 //
3714 Int_t entries = clusterArray->GetEntriesFast();
3715 if (entries<4) return;
3716 AliITSRecPoint* cluster = (AliITSRecPoint*)clusterArray->At(0);
3717 Int_t layer = cluster->GetLayer();
3718 if (layer>1) return;
3719 Int_t index[10000];
3720 Int_t ncandidates=0;
3721 Float_t r = (layer>0)? 7:4;
3722 //
3723 for (Int_t i=0;i<entries;i++){
3724 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(i);
3725 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3726 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3727 index[ncandidates] = i; //candidate to belong to delta electron track
3728 ncandidates++;
3729 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3730 cl0->SetDeltaProbability(1);
3731 }
3732 }
3733 //
3734 //
3735 //
3736 for (Int_t i=0;i<ncandidates;i++){
3737 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(index[i]);
3738 if (cl0->GetDeltaProbability()>0.8) continue;
3739 //
3740 Int_t ncl = 0;
3741 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3742 sumy=sumz=sumy2=sumyz=sumw=0.0;
3743 for (Int_t j=0;j<ncandidates;j++){
3744 if (i==j) continue;
3745 AliITSRecPoint* cl1 = (AliITSRecPoint*)clusterArray->At(index[j]);
3746 //
3747 Float_t dz = cl0->GetZ()-cl1->GetZ();
3748 Float_t dy = cl0->GetY()-cl1->GetY();
3749 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3750 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3751 y[ncl] = cl1->GetY();
3752 z[ncl] = cl1->GetZ();
3753 sumy+= y[ncl]*weight;
3754 sumz+= z[ncl]*weight;
3755 sumy2+=y[ncl]*y[ncl]*weight;
3756 sumyz+=y[ncl]*z[ncl]*weight;
3757 sumw+=weight;
3758 ncl++;
3759 }
3760 }
3761 if (ncl<4) continue;
3762 Float_t det = sumw*sumy2 - sumy*sumy;
3763 Float_t delta=1000;
3764 if (TMath::Abs(det)>0.01){
3765 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3766 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3767 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3768 }
3769 else{
3770 Float_t z0 = sumyz/sumy;
3771 delta = TMath::Abs(cl0->GetZ()-z0);
3772 }
3773 if ( delta<0.05) {
3774 cl0->SetDeltaProbability(1-20.*delta);
3775 }
3776 }
3777}
3778//------------------------------------------------------------------------
3779void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3780{
3781 //
3782 // Update ESD track
3783 //
3784 track->UpdateESDtrack(flags);
3785 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3786 if (oldtrack) delete oldtrack;
3787 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3788 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
3789 printf("Problem\n");
3790 }
3791}
3792//------------------------------------------------------------------------
3793Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3794 //
3795 // Get nearest upper layer close to the point xr.
3796 // rough approximation
3797 //
3798 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3799 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3800 Int_t res =6;
3801 for (Int_t i=0;i<6;i++){
3802 if (radius<kRadiuses[i]){
3803 res =i;
3804 break;
3805 }
3806 }
3807 return res;
3808}
3809//------------------------------------------------------------------------
3810void AliITStrackerMI::BuildMaterialLUT(TString material) {
3811 //--------------------------------------------------------------------
3812 // Fill a look-up table with mean material
3813 //--------------------------------------------------------------------
3814
3815 Int_t n=1000;
3816 Double_t mparam[7];
3817 Double_t point1[3],point2[3];
3818 Double_t phi,cosphi,sinphi,z;
3819 // 0-5 layers, 6 pipe, 7-8 shields
3820 Double_t rmin[9]={ 3.5, 5.5,13.0,22.0,35.0,41.0, 2.0, 8.0,25.0};
3821 Double_t rmax[9]={ 5.5, 8.0,17.0,26.0,41.0,47.0, 3.0,10.5,30.0};
3822
3823 Int_t ifirst=0,ilast=0;
3824 if(material.Contains("Pipe")) {
3825 ifirst=6; ilast=6;
3826 } else if(material.Contains("Shields")) {
3827 ifirst=7; ilast=8;
3828 } else if(material.Contains("Layers")) {
3829 ifirst=0; ilast=5;
3830 } else {
3831 Error("BuildMaterialLUT","Wrong layer name\n");
3832 }
3833
3834 for(Int_t imat=ifirst; imat<=ilast; imat++) {
3835 Double_t param[5]={0.,0.,0.,0.,0.};
3836 for (Int_t i=0; i<n; i++) {
3837 phi = 2.*TMath::Pi()*gRandom->Rndm();
3838 cosphi = TMath::Cos(phi); sinphi = TMath::Sin(phi);
3839 z = 14.*(-1.+2.*gRandom->Rndm()); // SPD barrel
3840 point1[0] = rmin[imat]*cosphi;
3841 point1[1] = rmin[imat]*sinphi;
3842 point1[2] = z;
3843 point2[0] = rmax[imat]*cosphi;
3844 point2[1] = rmax[imat]*sinphi;
3845 point2[2] = z;
3846 AliTracker::MeanMaterialBudget(point1,point2,mparam);
3847 for(Int_t j=0;j<5;j++) param[j]+=mparam[j];
3848 }
3849 for(Int_t j=0;j<5;j++) param[j]/=(Float_t)n;
3850 if(imat<=5) {
3851 fxOverX0Layer[imat] = param[1];
3852 fxTimesRhoLayer[imat] = param[0]*param[4];
3853 } else if(imat==6) {
3854 fxOverX0Pipe = param[1];
3855 fxTimesRhoPipe = param[0]*param[4];
3856 } else if(imat==7) {
3857 fxOverX0Shield[0] = param[1];
3858 fxTimesRhoShield[0] = param[0]*param[4];
3859 } else if(imat==8) {
3860 fxOverX0Shield[1] = param[1];
3861 fxTimesRhoShield[1] = param[0]*param[4];
3862 }
3863 }
3864 /*
3865 printf("%s\n",material.Data());
3866 printf("%f %f\n",fxOverX0Pipe,fxTimesRhoPipe);
3867 printf("%f %f\n",fxOverX0Shield[0],fxTimesRhoShield[0]);
3868 printf("%f %f\n",fxOverX0Shield[1],fxTimesRhoShield[1]);
3869 printf("%f %f\n",fxOverX0Layer[0],fxTimesRhoLayer[0]);
3870 printf("%f %f\n",fxOverX0Layer[1],fxTimesRhoLayer[1]);
3871 printf("%f %f\n",fxOverX0Layer[2],fxTimesRhoLayer[2]);
3872 printf("%f %f\n",fxOverX0Layer[3],fxTimesRhoLayer[3]);
3873 printf("%f %f\n",fxOverX0Layer[4],fxTimesRhoLayer[4]);
3874 printf("%f %f\n",fxOverX0Layer[5],fxTimesRhoLayer[5]);
3875 */
3876 return;
3877}
3878//------------------------------------------------------------------------
3879Int_t AliITStrackerMI::CorrectForPipeMaterial(AliITStrackMI *t,
3880 TString direction) {
3881 //-------------------------------------------------------------------
3882 // Propagate beyond beam pipe and correct for material
3883 // (material budget in different ways according to fUseTGeo value)
3884 // Add time if going outward (PropagateTo or PropagateToTGeo)
3885 //-------------------------------------------------------------------
3886
3887 // Define budget mode:
3888 // 0: material from AliITSRecoParam (hard coded)
3889 // 1: material from TGeo in one step (on the fly)
3890 // 2: material from lut
3891 // 3: material from TGeo in one step (same for all hypotheses)
3892 Int_t mode;
3893 switch(fUseTGeo) {
3894 case 0:
3895 mode=0;
3896 break;
3897 case 1:
3898 mode=1;
3899 break;
3900 case 2:
3901 mode=2;
3902 break;
3903 case 3:
3904 if(fTrackingPhase.Contains("Clusters2Tracks"))
3905 { mode=3; } else { mode=1; }
3906 break;
3907 case 4:
3908 if(fTrackingPhase.Contains("Clusters2Tracks"))
3909 { mode=3; } else { mode=2; }
3910 break;
3911 default:
3912 mode=0;
3913 break;
3914 }
3915 if(fTrackingPhase.Contains("Default")) mode=0;
3916
3917 Int_t index=fCurrentEsdTrack;
3918
3919 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
3920 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
3921 Double_t xToGo;
3922 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
3923
3924 Double_t xOverX0,x0,lengthTimesMeanDensity;
3925
3926 switch(mode) {
3927 case 0:
3928 xOverX0 = AliITSRecoParam::GetdPipe();
3929 x0 = AliITSRecoParam::GetX0Be();
3930 lengthTimesMeanDensity = xOverX0*x0;
3931 lengthTimesMeanDensity *= dir;
3932 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
3933 break;
3934 case 1:
3935 if (!t->PropagateToTGeo(xToGo,1)) return 0;
3936 break;
3937 case 2:
3938 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
3939 xOverX0 = fxOverX0Pipe;
3940 lengthTimesMeanDensity = fxTimesRhoPipe;
3941 lengthTimesMeanDensity *= dir;
3942 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
3943 break;
3944 case 3:
3945 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
3946 if(fxOverX0PipeTrks[index]<0) {
3947 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
3948 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
3949 ((1.-t->GetSnp())*(1.+t->GetSnp())));
3950 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
3951 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
3952 return 1;
3953 }
3954 xOverX0 = fxOverX0PipeTrks[index];
3955 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
3956 lengthTimesMeanDensity *= dir;
3957 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
3958 break;
3959 }
3960
3961 return 1;
3962}
3963//------------------------------------------------------------------------
3964Int_t AliITStrackerMI::CorrectForShieldMaterial(AliITStrackMI *t,
3965 TString shield,
3966 TString direction) {
3967 //-------------------------------------------------------------------
3968 // Propagate beyond SPD or SDD shield and correct for material
3969 // (material budget in different ways according to fUseTGeo value)
3970 // Add time if going outward (PropagateTo or PropagateToTGeo)
3971 //-------------------------------------------------------------------
3972
3973 // Define budget mode:
3974 // 0: material from AliITSRecoParam (hard coded)
3975 // 1: material from TGeo in steps of X cm (on the fly)
3976 // X = AliITSRecoParam::GetStepSizeTGeo()
3977 // 2: material from lut
3978 // 3: material from TGeo in one step (same for all hypotheses)
3979 Int_t mode;
3980 switch(fUseTGeo) {
3981 case 0:
3982 mode=0;
3983 break;
3984 case 1:
3985 mode=1;
3986 break;
3987 case 2:
3988 mode=2;
3989 break;
3990 case 3:
3991 if(fTrackingPhase.Contains("Clusters2Tracks"))
3992 { mode=3; } else { mode=1; }
3993 break;
3994 case 4:
3995 if(fTrackingPhase.Contains("Clusters2Tracks"))
3996 { mode=3; } else { mode=2; }
3997 break;
3998 default:
3999 mode=0;
4000 break;
4001 }
4002 if(fTrackingPhase.Contains("Default")) mode=0;
4003
4004 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4005 Double_t rToGo;
4006 Int_t shieldindex=0;
4007 if (shield.Contains("SDD")) { // SDDouter
4008 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(1) : AliITSRecoParam::GetrOutsideShield(1));
4009 shieldindex=1;
4010 } else if (shield.Contains("SPD")) { // SPDouter
4011 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(0) : AliITSRecoParam::GetrOutsideShield(0));
4012 shieldindex=0;
4013 } else {
4014 Error("CorrectForShieldMaterial"," Wrong shield name\n");
4015 return 0;
4016 }
4017
4018 // do nothing if we are already beyond the shield
4019 Double_t rTrack = TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY());
4020 if(dir<0 && rTrack > rToGo) return 1; // going outward
4021 if(dir>0 && rTrack < rToGo) return 1; // going inward
4022
4023
4024 Double_t xToGo;
4025 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4026
4027 Int_t index=2*fCurrentEsdTrack+shieldindex;
4028
4029 Double_t xOverX0,x0,lengthTimesMeanDensity;
4030 Int_t nsteps=1;
4031
4032 switch(mode) {
4033 case 0:
4034 xOverX0 = AliITSRecoParam::Getdshield(shieldindex);
4035 x0 = AliITSRecoParam::GetX0shield(shieldindex);
4036 lengthTimesMeanDensity = xOverX0*x0;
4037 lengthTimesMeanDensity *= dir;
4038 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4039 break;
4040 case 1:
4041 nsteps= (Int_t)(TMath::Abs(t->GetX()-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4042 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4043 break;
4044 case 2:
4045 if(fxOverX0Shield[shieldindex]<0) BuildMaterialLUT("Shields");
4046 xOverX0 = fxOverX0Shield[shieldindex];
4047 lengthTimesMeanDensity = fxTimesRhoShield[shieldindex];
4048 lengthTimesMeanDensity *= dir;
4049 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4050 break;
4051 case 3:
4052 if(!fxOverX0ShieldTrks || index<0 || index>=2*fNtracks) Error("CorrectForShieldMaterial","Incorrect usage of UseTGeo option!\n");
4053 if(fxOverX0ShieldTrks[index]<0) {
4054 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4055 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4056 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4057 fxOverX0ShieldTrks[index] = TMath::Abs(xOverX0)/angle;
4058 fxTimesRhoShieldTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4059 return 1;
4060 }
4061 xOverX0 = fxOverX0ShieldTrks[index];
4062 lengthTimesMeanDensity = fxTimesRhoShieldTrks[index];
4063 lengthTimesMeanDensity *= dir;
4064 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4065 break;
4066 }
4067
4068 return 1;
4069}
4070//------------------------------------------------------------------------
4071Int_t AliITStrackerMI::CorrectForLayerMaterial(AliITStrackMI *t,
4072 Int_t layerindex,
4073 Double_t oldGlobXYZ[3],
4074 TString direction) {
4075 //-------------------------------------------------------------------
4076 // Propagate beyond layer and correct for material
4077 // (material budget in different ways according to fUseTGeo value)
4078 // Add time if going outward (PropagateTo or PropagateToTGeo)
4079 //-------------------------------------------------------------------
4080
4081 // Define budget mode:
4082 // 0: material from AliITSRecoParam (hard coded)
4083 // 1: material from TGeo in stepsof X cm (on the fly)
4084 // X = AliITSRecoParam::GetStepSizeTGeo()
4085 // 2: material from lut
4086 // 3: material from TGeo in one step (same for all hypotheses)
4087 Int_t mode;
4088 switch(fUseTGeo) {
4089 case 0:
4090 mode=0;
4091 break;
4092 case 1:
4093 mode=1;
4094 break;
4095 case 2:
4096 mode=2;
4097 break;
4098 case 3:
4099 if(fTrackingPhase.Contains("Clusters2Tracks"))
4100 { mode=3; } else { mode=1; }
4101 break;
4102 case 4:
4103 if(fTrackingPhase.Contains("Clusters2Tracks"))
4104 { mode=3; } else { mode=2; }
4105 break;
4106 default:
4107 mode=0;
4108 break;
4109 }
4110 if(fTrackingPhase.Contains("Default")) mode=0;
4111
4112 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4113
4114 Double_t r=fgLayers[layerindex].GetR();
4115 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
4116
4117 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
4118 Double_t xToGo;
4119 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4120
4121 Int_t index=6*fCurrentEsdTrack+layerindex;
4122
4123
4124 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
4125 Int_t nsteps=1;
4126
4127 // back before material (no correction)
4128 Double_t rOld,xOld;
4129 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
4130 if (!t->GetLocalXat(rOld,xOld)) return 0;
4131 if (!t->Propagate(xOld)) return 0;
4132
4133 switch(mode) {
4134 case 0:
4135 xOverX0 = fgLayers[layerindex].GetThickness(t->GetY(),t->GetZ(),x0);
4136 lengthTimesMeanDensity = xOverX0*x0;
4137 lengthTimesMeanDensity *= dir;
4138 // Bring the track beyond the material
4139 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4140 break;
4141 case 1:
4142 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4143 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4144 break;
4145 case 2:
4146 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
4147 xOverX0 = fxOverX0Layer[layerindex];
4148 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
4149 lengthTimesMeanDensity *= dir;
4150 // Bring the track beyond the material
4151 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4152 break;
4153 case 3:
4154 if(!fxOverX0LayerTrks || index<0 || index>=6*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
4155 if(fxOverX0LayerTrks[index]<0) {
4156 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4157 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
4158 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4159 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4160 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
4161 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4162 return 1;
4163 }
4164 xOverX0 = fxOverX0LayerTrks[index];
4165 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
4166 lengthTimesMeanDensity *= dir;
4167 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4168 break;
4169 }
4170
4171
4172 return 1;
4173}
4174//------------------------------------------------------------------------
4175void AliITStrackerMI::MakeTrksMaterialLUT(Int_t ntracks) {
4176 //-----------------------------------------------------------------
4177 // Initialize LUT for storing material for each prolonged track
4178 //-----------------------------------------------------------------
4179 fxOverX0PipeTrks = new Float_t[ntracks];
4180 fxTimesRhoPipeTrks = new Float_t[ntracks];
4181 fxOverX0ShieldTrks = new Float_t[ntracks*2];
4182 fxTimesRhoShieldTrks = new Float_t[ntracks*2];
4183 fxOverX0LayerTrks = new Float_t[ntracks*6];
4184 fxTimesRhoLayerTrks = new Float_t[ntracks*6];
4185
4186 for(Int_t i=0; i<ntracks; i++) {
4187 fxOverX0PipeTrks[i] = -1.;
4188 fxTimesRhoPipeTrks[i] = -1.;
4189 }
4190 for(Int_t j=0; j<ntracks*2; j++) {
4191 fxOverX0ShieldTrks[j] = -1.;
4192 fxTimesRhoShieldTrks[j] = -1.;
4193 }
4194 for(Int_t k=0; k<ntracks*6; k++) {
4195 fxOverX0LayerTrks[k] = -1.;
4196 fxTimesRhoLayerTrks[k] = -1.;
4197 }
4198
4199 fNtracks = ntracks;
4200
4201 return;
4202}
4203//------------------------------------------------------------------------
4204void AliITStrackerMI::DeleteTrksMaterialLUT() {
4205 //-----------------------------------------------------------------
4206 // Delete LUT for storing material for each prolonged track
4207 //-----------------------------------------------------------------
4208 if(fxOverX0PipeTrks) {
4209 delete [] fxOverX0PipeTrks; fxOverX0PipeTrks = 0;
4210 }
4211 if(fxOverX0ShieldTrks) {
4212 delete [] fxOverX0ShieldTrks; fxOverX0ShieldTrks = 0;
4213 }
4214
4215 if(fxOverX0LayerTrks) {
4216 delete [] fxOverX0LayerTrks; fxOverX0LayerTrks = 0;
4217 }
4218 if(fxTimesRhoPipeTrks) {
4219 delete [] fxTimesRhoPipeTrks; fxTimesRhoPipeTrks = 0;
4220 }
4221 if(fxTimesRhoShieldTrks) {
4222 delete [] fxTimesRhoShieldTrks; fxTimesRhoShieldTrks = 0;
4223 }
4224 if(fxTimesRhoLayerTrks) {
4225 delete [] fxTimesRhoLayerTrks; fxTimesRhoLayerTrks = 0;
4226 }
4227 return;
4228}
4229//------------------------------------------------------------------------
4230Int_t AliITStrackerMI::CheckSkipLayer(const AliITStrackMI *track,
4231 Int_t ilayer,Int_t idet) const {
4232 //-----------------------------------------------------------------
4233 // This method is used to decide whether to allow a prolongation
4234 // without clusters, because we want to skip the layer.
4235 // In this case the return value is > 0:
4236 // return 1: the user requested to skip a layer
4237 // return 2: track outside z acceptance of SSD/SDD and will cross both SPD
4238 //-----------------------------------------------------------------
4239
4240 if (AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilayer)) return 1;
4241
4242 if (idet<0 && ilayer>1 && AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance()) {
4243 // check if track will cross SPD outer layer
4244 Double_t phiAtSPD2,zAtSPD2;
4245 if (track->GetPhiZat(fgLayers[1].GetR(),phiAtSPD2,zAtSPD2)) {
4246 if (TMath::Abs(zAtSPD2)<2.*AliITSRecoParam::GetSPDdetzlength()) return 2;
4247 }
4248 }
4249
4250 return 0;
4251}
4252//------------------------------------------------------------------------
4253Int_t AliITStrackerMI::CheckDeadZone(AliITStrackMI *track,
4254 Int_t ilayer,Int_t idet,
4255 Double_t dz,Double_t dy,
4256 Bool_t noClusters) const {
4257 //-----------------------------------------------------------------
4258 // This method is used to decide whether to allow a prolongation
4259 // without clusters, because there is a dead zone in the road.
4260 // In this case the return value is > 0:
4261 // return 1: dead zone at z=0,+-7cm in SPD
4262 // return 2: all road is "bad" (dead or noisy) from the OCDB
4263 // return 3: at least a chip is "bad" (dead or noisy) from the OCDB
4264 // return 4: at least a single channel is "bad" (dead or noisy) from the OCDB
4265 //-----------------------------------------------------------------
4266
4267 // check dead zones at z=0,+-7cm in the SPD
4268 if (ilayer<2 && !AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
4269 Double_t zmindead[3]={fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
4270 fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
4271 fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength()};
4272 Double_t zmaxdead[3]={fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
4273 fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
4274 fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength()};
4275 for (Int_t i=0; i<3; i++)
4276 if (track->GetZ()-dz<zmaxdead[i] && track->GetZ()+dz>zmindead[i]) {
4277 AliDebug(2,Form("crack SPD %d",ilayer));
4278 return 1;
4279 }
4280 }
4281
4282 // check bad zones from OCDB
4283 if (!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return 0;
4284
4285 if (idet<0) return 0;
4286
4287 AliITSdetector &det=fgLayers[ilayer].GetDetector(idet);
4288
4289 Int_t detType=-1;
4290 Float_t detSizeFactorX=0.0001,detSizeFactorZ=0.0001;
4291 if (ilayer==0 || ilayer==1) { // ---------- SPD
4292 detType = 0;
4293 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
4294 detType = 1;
4295 detSizeFactorX *= 2.;
4296 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
4297 detType = 2;
4298 }
4299 AliITSsegmentation *segm = (AliITSsegmentation*)fkDetTypeRec->GetSegmentationModel(detType);
4300 if (detType==2) segm->SetLayer(ilayer+1);
4301 Float_t detSizeX = detSizeFactorX*segm->Dx();
4302 Float_t detSizeZ = detSizeFactorZ*segm->Dz();
4303
4304 // check if the road overlaps with bad chips
4305 Float_t xloc,zloc;
4306 LocalModuleCoord(ilayer,idet,track,xloc,zloc);
4307 Float_t zlocmin = zloc-dz;
4308 Float_t zlocmax = zloc+dz;
4309 Float_t xlocmin = xloc-dy;
4310 Float_t xlocmax = xloc+dy;
4311 Int_t chipsInRoad[100];
4312
4313 // check if road goes out of detector
4314 Bool_t touchNeighbourDet=kFALSE;
4315 if (TMath::Abs(xlocmin)>0.5*detSizeX) {xlocmin=-0.5*detSizeX; touchNeighbourDet=kTRUE;}
4316 if (TMath::Abs(xlocmax)>0.5*detSizeX) {xlocmax=+0.5*detSizeX; touchNeighbourDet=kTRUE;}
4317 if (TMath::Abs(zlocmin)>0.5*detSizeZ) {zlocmin=-0.5*detSizeZ; touchNeighbourDet=kTRUE;}
4318 if (TMath::Abs(zlocmax)>0.5*detSizeZ) {zlocmax=+0.5*detSizeZ; touchNeighbourDet=kTRUE;}
4319 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));
4320
4321 // check if this detector is bad
4322 if (det.IsBad()) {
4323 AliDebug(2,Form("lay %d bad detector %d",ilayer,idet));
4324 if(!touchNeighbourDet) {
4325 return 2; // all detectors in road are bad
4326 } else {
4327 return 3; // at least one is bad
4328 }
4329 }
4330
4331 Int_t nChipsInRoad = segm->GetChipsInLocalWindow(chipsInRoad,zlocmin,zlocmax,xlocmin,xlocmax);
4332 AliDebug(2,Form("lay %d nChipsInRoad %d",ilayer,nChipsInRoad));
4333 if (!nChipsInRoad) return 0;
4334
4335 Bool_t anyBad=kFALSE,anyGood=kFALSE;
4336 for (Int_t iCh=0; iCh<nChipsInRoad; iCh++) {
4337 if (chipsInRoad[iCh]<0 || chipsInRoad[iCh]>det.GetNChips()-1) continue;
4338 AliDebug(2,Form(" chip %d bad %d",chipsInRoad[iCh],(Int_t)det.IsChipBad(chipsInRoad[iCh])));
4339 if (det.IsChipBad(chipsInRoad[iCh])) {
4340 anyBad=kTRUE;
4341 } else {
4342 anyGood=kTRUE;
4343 }
4344 }
4345
4346 if (!anyGood) {
4347 if(!touchNeighbourDet) {
4348 AliDebug(2,"all bad in road");
4349 return 2; // all chips in road are bad
4350 } else {
4351 return 3; // at least a bad chip in road
4352 }
4353 }
4354
4355 if (anyBad) {
4356 AliDebug(2,"at least a bad in road");
4357 return 3; // at least a bad chip in road
4358 }
4359
4360
4361 if (!AliITSReconstructor::GetRecoParam()->GetUseSingleBadChannelsFromOCDB()
4362 || !noClusters) return 0;
4363
4364 // There are no clusters in road: check if there is at least
4365 // a bad SPD pixel or SDD anode or SSD strips on both sides
4366
4367 Int_t idetInITS=idet;
4368 for(Int_t l=0;l<ilayer;l++) idetInITS+=AliITSgeomTGeo::GetNLadders(l+1)*AliITSgeomTGeo::GetNDetectors(l+1);
4369
4370 if (fITSChannelStatus->AnyBadInRoad(idetInITS,zlocmin,zlocmax,xlocmin,xlocmax)) {
4371 AliDebug(2,Form("Bad channel in det %d of layer %d\n",idet,ilayer));
4372 return 4;
4373 }
4374 //if (fITSChannelStatus->FractionOfBadInRoad(idet,zlocmin,zlocmax,xlocmin,xlocmax) > AliITSReconstructor::GetRecoParam()->GetMinFractionOfBadInRoad()) return 3;
4375
4376 return 0;
4377}
4378//------------------------------------------------------------------------
4379Bool_t AliITStrackerMI::LocalModuleCoord(Int_t ilayer,Int_t idet,
4380 const AliITStrackMI *track,
4381 Float_t &xloc,Float_t &zloc) const {
4382 //-----------------------------------------------------------------
4383 // Gives position of track in local module ref. frame
4384 //-----------------------------------------------------------------
4385
4386 xloc=0.;
4387 zloc=0.;
4388
4389 if(idet<0) return kFALSE;
4390
4391 Int_t ndet=AliITSgeomTGeo::GetNDetectors(ilayer+1); // layers from 1 to 6
4392
4393 Int_t lad = Int_t(idet/ndet) + 1;
4394
4395 Int_t det = idet - (lad-1)*ndet + 1;
4396
4397 Double_t xyzGlob[3],xyzLoc[3];
4398
4399 AliITSdetector &detector = fgLayers[ilayer].GetDetector(idet);
4400 // take into account the misalignment: xyz at real detector plane
4401 if(!track->GetXYZAt(detector.GetRmisal(),GetBz(),xyzGlob)) return kFALSE;
4402
4403 if(!AliITSgeomTGeo::GlobalToLocal(ilayer+1,lad,det,xyzGlob,xyzLoc)) return kFALSE;
4404
4405 xloc = (Float_t)xyzLoc[0];
4406 zloc = (Float_t)xyzLoc[2];
4407
4408 return kTRUE;
4409}
4410//------------------------------------------------------------------------
4411Bool_t AliITStrackerMI::IsOKForPlaneEff(const AliITStrackMI* track, const Int_t *clusters, Int_t ilayer) const {
4412//
4413// Method to be optimized further:
4414// Aim: decide whether a track can be used for PlaneEff evaluation
4415// the decision is taken based on the track quality at the layer under study
4416// no information on the clusters on this layer has to be used
4417// The criterium is to reject tracks at boundaries between basic block (e.g. SPD chip)
4418// the cut is done on number of sigmas from the boundaries
4419//
4420// Input: Actual track, layer [0,5] under study
4421// Output: none
4422// Return: kTRUE if this is a good track
4423//
4424// it will apply a pre-selection to obtain good quality tracks.
4425// Here also you will have the possibility to put a control on the
4426// impact point of the track on the basic block, in order to exclude border regions
4427// this will be done by calling a proper method of the AliITSPlaneEff class.
4428//
4429// input: AliITStrackMI* track, ilayer= layer number [0,5]
4430// return: Bool_t -> kTRUE if usable track, kFALSE if not usable.
4431//
4432 Int_t index[AliITSgeomTGeo::kNLayers];
4433 Int_t k;
4434 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
4435 //
4436 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
4437 index[k]=clusters[k];
4438 }
4439
4440 if(!fPlaneEff)
4441 {AliWarning("IsOKForPlaneEff: null pointer to AliITSPlaneEff"); return kFALSE;}
4442 AliITSlayer &layer=fgLayers[ilayer];
4443 Double_t r=layer.GetR();
4444 AliITStrackMI tmp(*track);
4445
4446// require a minimal number of cluster in other layers and eventually clusters in closest layers
4447 Int_t ncl=0;
4448 for(Int_t lay=AliITSgeomTGeo::kNLayers-1;lay>ilayer;lay--) {
4449 AliDebug(2,Form("trak=%d lay=%d ; index=%d ESD label= %d",tmp.GetLabel(),lay,
4450 tmp.GetClIndex(lay),((AliESDtrack*)tmp.GetESDtrack())->GetLabel())) ;
4451 if (tmp.GetClIndex(lay)>=0) ncl++;
4452 }
4453 Bool_t nextout = kFALSE;
4454 if(ilayer==AliITSgeomTGeo::kNLayers-1) nextout=kTRUE; // you are already on the outermost layer
4455 else nextout = ((tmp.GetClIndex(ilayer+1)>=0)? kTRUE : kFALSE );
4456 Bool_t nextin = kFALSE;
4457 if(ilayer==0) nextin=kTRUE; // you are already on the innermost layer
4458 else nextin = ((index[ilayer-1]>=0)? kTRUE : kFALSE );
4459 if(ncl<AliITSgeomTGeo::kNLayers-(ilayer+1)-AliITSReconstructor::GetRecoParam()->GetMaxMissingClustersPlaneEff())
4460 return kFALSE;
4461 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInOuterLayerPlaneEff() && !nextout) return kFALSE;
4462 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInInnerLayerPlaneEff() && !nextin) return kFALSE;
4463 if(tmp.Pt() < AliITSReconstructor::GetRecoParam()->GetMinPtPlaneEff()) return kFALSE;
4464 // if(AliITSReconstructor::GetRecoParam()->GetOnlyConstraintPlaneEff() && !tmp.GetConstrain()) return kFALSE;
4465
4466// detector number
4467 Double_t phi,z;
4468 if (!tmp.GetPhiZat(r,phi,z)) return kFALSE;
4469 Int_t idet=layer.FindDetectorIndex(phi,z);
4470 if(idet<0) { AliInfo(Form("cannot find detector"));
4471 return kFALSE;}
4472
4473 // here check if it has good Chi Square.
4474
4475 //propagate to the intersection with the detector plane
4476 const AliITSdetector &det=layer.GetDetector(idet);
4477 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return kFALSE;
4478
4479 Float_t locx; //
4480 Float_t locz; //
4481 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return kFALSE;
4482 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
4483 if(key>fPlaneEff->Nblock()) return kFALSE;
4484 Float_t blockXmn,blockXmx,blockZmn,blockZmx;
4485 if (!fPlaneEff->GetBlockBoundaries(key,blockXmn,blockXmx,blockZmn,blockZmx)) return kFALSE;
4486 //***************
4487 // DEFINITION OF SEARCH ROAD FOR accepting a track
4488 //
4489 //For the time being they are hard-wired, later on from AliITSRecoParam
4490 // Double_t nsigx=AliITSRecoParam::GetNSigXFarFromBoundary();
4491 // Double_t nsigz=AliITSRecoParam::GetNSigZFarFromBoundary();
4492 Double_t nsigz=4;
4493 Double_t nsigx=4;
4494 Double_t dx=nsigx*TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
4495 Double_t dz=nsigz*TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
4496 // done for RecPoints
4497
4498 // exclude tracks at boundary between detectors
4499 //Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidthPlaneEff();
4500 Double_t boundaryWidth=0; // for the time being hard-wired, later on from AliITSRecoParam
4501 AliDebug(2,Form("Tracking: track impact x=%f, y=%f, z=%f",tmp.GetX(), tmp.GetY(), tmp.GetZ()));
4502 AliDebug(2,Form("Local: track impact x=%f, z=%f",locx,locz));
4503 AliDebug(2,Form("Search Road. Tracking: dy=%f , dz=%f",dx,dz));
4504
4505 if ( (locx-dx < blockXmn+boundaryWidth) ||
4506 (locx+dx > blockXmx-boundaryWidth) ||
4507 (locz-dz < blockZmn+boundaryWidth) ||
4508 (locz+dz > blockZmx-boundaryWidth) ) return kFALSE;
4509 return kTRUE;
4510}
4511//------------------------------------------------------------------------
4512void AliITStrackerMI::UseTrackForPlaneEff(const AliITStrackMI* track, Int_t ilayer) {
4513//
4514// This Method has to be optimized! For the time-being it uses the same criteria
4515// as those used in the search of extra clusters for overlapping modules.
4516//
4517// Method Purpose: estabilish whether a track has produced a recpoint or not
4518// in the layer under study (For Plane efficiency)
4519//
4520// inputs: AliITStrackMI* track (pointer to a usable track)
4521// outputs: none
4522// side effects: update (by 1 count) the Plane Efficiency statistics of the basic block
4523// traversed by this very track. In details:
4524// - if a cluster can be associated to the track then call
4525// AliITSPlaneEff::UpDatePlaneEff(key,kTRUE);
4526// - if not, the AliITSPlaneEff::UpDatePlaneEff(key,kFALSE) is called
4527//
4528 if(!fPlaneEff)
4529 {AliWarning("UseTrackForPlaneEff: null pointer to AliITSPlaneEff"); return;}
4530 AliITSlayer &layer=fgLayers[ilayer];
4531 Double_t r=layer.GetR();
4532 AliITStrackMI tmp(*track);
4533
4534// detector number
4535 Double_t phi,z;
4536 if (!tmp.GetPhiZat(r,phi,z)) return;
4537 Int_t idet=layer.FindDetectorIndex(phi,z);
4538
4539 if(idet<0) { AliInfo(Form("cannot find detector"));
4540 return;}
4541
4542
4543//propagate to the intersection with the detector plane
4544 const AliITSdetector &det=layer.GetDetector(idet);
4545 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return;
4546
4547
4548//***************
4549// DEFINITION OF SEARCH ROAD FOR CLUSTERS SELECTION
4550//
4551 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
4552 TMath::Sqrt(tmp.GetSigmaZ2() +
4553 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4554 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4555 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
4556 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
4557 TMath::Sqrt(tmp.GetSigmaY2() +
4558 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4559 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4560 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
4561
4562// road in global (rphi,z) [i.e. in tracking ref. system]
4563 Double_t zmin = tmp.GetZ() - dz;
4564 Double_t zmax = tmp.GetZ() + dz;
4565 Double_t ymin = tmp.GetY() + r*det.GetPhi() - dy;
4566 Double_t ymax = tmp.GetY() + r*det.GetPhi() + dy;
4567
4568// select clusters in road
4569 layer.SelectClusters(zmin,zmax,ymin,ymax);
4570
4571// Define criteria for track-cluster association
4572 Double_t msz = tmp.GetSigmaZ2() +
4573 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4574 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4575 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
4576 Double_t msy = tmp.GetSigmaY2() +
4577 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4578 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4579 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
4580 if (tmp.GetConstrain()) {
4581 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
4582 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
4583 } else {
4584 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
4585 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
4586 }
4587 msz = 1./msz; // 1/RoadZ^2
4588 msy = 1./msy; // 1/RoadY^2
4589//
4590
4591 const AliITSRecPoint *cl=0; Int_t clidx=-1, ci=-1;
4592 Int_t idetc=-1;
4593 Double_t chi2trkcl=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
4594 //Double_t tolerance=0.2;
4595 /*while ((cl=layer.GetNextCluster(clidx))!=0) {
4596 idetc = cl->GetDetectorIndex();
4597 if(idet!=idetc) continue;
4598 //Int_t ilay = cl->GetLayer();
4599
4600 if (TMath::Abs(tmp.GetZ() - cl->GetZ()) > tolerance) continue;
4601 if (TMath::Abs(tmp.GetY() - cl->GetY()) > tolerance) continue;
4602
4603 Double_t chi2=tmp.GetPredictedChi2(cl);
4604 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; }
4605 }*/
4606 Float_t locx; //
4607 Float_t locz; //
4608 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return;
4609//
4610 AliDebug(2,Form("ilayer= %d, idet=%d, x= %f, z=%f",ilayer,idet,locx,locz));
4611 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
4612 if(key>fPlaneEff->Nblock()) return;
4613 Bool_t found=kFALSE;
4614 //if (ci>=0) {
4615 Double_t chi2;
4616 while ((cl=layer.GetNextCluster(clidx))!=0) {
4617 idetc = cl->GetDetectorIndex();
4618 if(idet!=idetc) continue;
4619 // here real control to see whether the cluster can be associated to the track.
4620 // cluster not associated to track
4621 if ( (tmp.GetZ()-cl->GetZ())*(tmp.GetZ()-cl->GetZ())*msz +
4622 (tmp.GetY()-cl->GetY())*(tmp.GetY()-cl->GetY())*msy > 1. ) continue;
4623 // calculate track-clusters chi2
4624 chi2 = GetPredictedChi2MI(&tmp,cl,ilayer); // note that this method change track tmp
4625 // in particular, the error associated to the cluster
4626 //Double_t chi2 = tmp.GetPredictedChi(cl); // this method does not change track tmp
4627 // chi2 cut
4628 if (chi2 > AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) continue;
4629 found=kTRUE;
4630 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; } // this just to trace which cluster is selected
4631 // track->SetExtraCluster(ilayer,(ilayer<<28)+ci);
4632 // track->SetExtraModule(ilayer,idetExtra);
4633 }
4634 if(!fPlaneEff->UpDatePlaneEff(found,key))
4635 AliWarning(Form("UseTrackForPlaneEff: cannot UpDate PlaneEff for key=%d",key));
4636 if(fPlaneEff->GetCreateHistos()&& AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) {
4637 Float_t tr[4]={99999.,99999.,9999.,9999.}; // initialize to high values
4638 Float_t clu[4]={-99999.,-99999.,9999.,9999.}; // (in some cases GetCov fails)
4639 Int_t cltype[2]={-999,-999};
4640
4641 tr[0]=locx;
4642 tr[1]=locz;
4643 tr[2]=TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
4644 tr[3]=TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
4645
4646 if (found){
4647 clu[0]=layer.GetCluster(ci)->GetDetLocalX();
4648 clu[1]=layer.GetCluster(ci)->GetDetLocalZ();
4649 cltype[0]=layer.GetCluster(ci)->GetNy();
4650 cltype[1]=layer.GetCluster(ci)->GetNz();
4651
4652 // Without the following 6 lines you would retrieve the nominal error of a cluster (e.g. for the SPD:
4653 // X->50/sqrt(12)=14 micron Z->450/sqrt(12)= 120 micron)
4654 // Within AliTrackerMI/AliTrackMI the error on the cluster is associated to the AliITStrackMI (fSigmaY,Z)
4655 // It is computed properly by calling the method
4656 // AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
4657 // T
4658 //Double_t x=0.5*(tmp.GetX()+layer.GetCluster(ci)->GetX()); // Take into account the mis-alignment
4659 //if (tmp.PropagateTo(x,0.,0.)) {
4660 chi2=GetPredictedChi2MI(&tmp,layer.GetCluster(ci),ilayer);
4661 AliCluster c(*layer.GetCluster(ci));
4662 c.SetSigmaY2(tmp.GetSigmaY(ilayer)*tmp.GetSigmaY(ilayer));
4663 c.SetSigmaZ2(tmp.GetSigmaZ(ilayer)*tmp.GetSigmaZ(ilayer));
4664 //if (layer.GetCluster(ci)->GetGlobalCov(cov)) // by using this, instead, you got nominal cluster errors
4665 clu[2]=TMath::Sqrt(c.GetSigmaY2());
4666 clu[3]=TMath::Sqrt(c.GetSigmaZ2());
4667 //}
4668 }
4669 fPlaneEff->FillHistos(key,found,tr,clu,cltype);
4670 }
4671return;
4672}