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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#include <TVector3.h>
36
37#include "AliLog.h"
38#include "AliGeomManager.h"
39#include "AliITSPlaneEff.h"
40#include "AliTrackPointArray.h"
41#include "AliESDEvent.h"
42#include "AliESDtrack.h"
43#include "AliV0.h"
44#include "AliITSChannelStatus.h"
45#include "AliITSDetTypeRec.h"
46#include "AliITSRecPoint.h"
47#include "AliITSRecPointContainer.h"
48#include "AliITSgeomTGeo.h"
49#include "AliITSReconstructor.h"
50#include "AliITSClusterParam.h"
51#include "AliITSsegmentation.h"
52#include "AliITSCalibration.h"
53#include "AliITSPlaneEffSPD.h"
54#include "AliITSPlaneEffSDD.h"
55#include "AliITSPlaneEffSSD.h"
56#include "AliITSV0Finder.h"
57#include "AliITStrackerMI.h"
58#include "AliMathBase.h"
59
60ClassImp(AliITStrackerMI)
61
62AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[AliITSgeomTGeo::kNLayers]; // ITS layers
63
64AliITStrackerMI::AliITStrackerMI():AliTracker(),
65fI(0),
66fBestTrack(),
67fTrackToFollow(),
68fTrackHypothesys(),
69fBestHypothesys(),
70fOriginal(),
71fCurrentEsdTrack(),
72fPass(0),
73fAfterV0(kFALSE),
74fLastLayerToTrackTo(0),
75fCoefficients(0),
76fEsd(0),
77fTrackingPhase("Default"),
78fUseTGeo(3),
79fNtracks(0),
80fxOverX0Pipe(-1.),
81fxTimesRhoPipe(-1.),
82fxOverX0PipeTrks(0),
83fxTimesRhoPipeTrks(0),
84fxOverX0ShieldTrks(0),
85fxTimesRhoShieldTrks(0),
86fxOverX0LayerTrks(0),
87fxTimesRhoLayerTrks(0),
88fDebugStreamer(0),
89fITSChannelStatus(0),
90fkDetTypeRec(0),
91fPlaneEff(0) {
92 //Default constructor
93 Int_t i;
94 for(i=0;i<4;i++) fSPDdetzcentre[i]=0.;
95 for(i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
96 for(i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
97 fOriginal.SetOwner();
98}
99//------------------------------------------------------------------------
100AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
101fI(AliITSgeomTGeo::GetNLayers()),
102fBestTrack(),
103fTrackToFollow(),
104fTrackHypothesys(),
105fBestHypothesys(),
106fOriginal(),
107fCurrentEsdTrack(),
108fPass(0),
109fAfterV0(kFALSE),
110fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()),
111fCoefficients(0),
112fEsd(0),
113fTrackingPhase("Default"),
114fUseTGeo(3),
115fNtracks(0),
116fxOverX0Pipe(-1.),
117fxTimesRhoPipe(-1.),
118fxOverX0PipeTrks(0),
119fxTimesRhoPipeTrks(0),
120fxOverX0ShieldTrks(0),
121fxTimesRhoShieldTrks(0),
122fxOverX0LayerTrks(0),
123fxTimesRhoLayerTrks(0),
124fDebugStreamer(0),
125fITSChannelStatus(0),
126fkDetTypeRec(0),
127fPlaneEff(0) {
128 //--------------------------------------------------------------------
129 //This is the AliITStrackerMI constructor
130 //--------------------------------------------------------------------
131 if (geom) {
132 AliWarning("\"geom\" is actually a dummy argument !");
133 }
134
135 fOriginal.SetOwner();
136 fCoefficients = 0;
137 fAfterV0 = kFALSE;
138
139 for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
140 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
141 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
142
143 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
144 AliITSgeomTGeo::GetTranslation(i,1,1,xyz);
145 Double_t poff=TMath::ATan2(y,x);
146 Double_t zoff=z;
147
148 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
149 Double_t r=TMath::Sqrt(x*x + y*y);
150
151 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
152 r += TMath::Sqrt(x*x + y*y);
153 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
154 r += TMath::Sqrt(x*x + y*y);
155 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
156 r += TMath::Sqrt(x*x + y*y);
157 r*=0.25;
158
159 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
160
161 for (Int_t j=1; j<nlad+1; j++) {
162 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
163 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
164 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
165 m.Multiply(tm);
166 Double_t txyz[3]={0.};
167 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
168 m.LocalToMaster(txyz,xyz);
169 r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
170 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
171
172 if (phi<0) phi+=TMath::TwoPi();
173 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
174
175 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
176 new(&det) AliITSdetector(r,phi);
177 // compute the real radius (with misalignment)
178 TGeoHMatrix mmisal(*(AliITSgeomTGeo::GetMatrix(i,j,k)));
179 mmisal.Multiply(tm);
180 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
181 mmisal.LocalToMaster(txyz,xyz);
182 Double_t rmisal=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
183 det.SetRmisal(rmisal);
184
185 } // end loop on detectors
186 } // end loop on ladders
187 fForceSkippingOfLayer[i-1] = 0;
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 fLastLayerToTrackTo=AliITSRecoParam::GetLastLayerToTrackTo();
205 for (Int_t i=0;i<100000;i++){
206 fBestTrackIndex[i]=0;
207 }
208
209 // store positions of centre of SPD modules (in z)
210 // The convetion is that fSPDdetzcentre is ordered from -z to +z
211 Double_t tr[3];
212 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
213 if (tr[2]<0) { // old geom (up to v5asymmPPR)
214 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
215 fSPDdetzcentre[0] = tr[2];
216 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
217 fSPDdetzcentre[1] = tr[2];
218 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
219 fSPDdetzcentre[2] = tr[2];
220 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
221 fSPDdetzcentre[3] = tr[2];
222 } else { // new geom (from v11Hybrid)
223 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
224 fSPDdetzcentre[0] = tr[2];
225 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
226 fSPDdetzcentre[1] = tr[2];
227 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
228 fSPDdetzcentre[2] = tr[2];
229 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
230 fSPDdetzcentre[3] = tr[2];
231 }
232
233 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
234 if(AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance() && fUseTGeo!=1 && fUseTGeo!=3) {
235 AliWarning("fUseTGeo changed to 3 because fExtendedEtaAcceptance is kTRUE");
236 fUseTGeo = 3;
237 }
238
239 for(Int_t i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
240 for(Int_t i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
241
242 if (AliITSReconstructor::GetRecoParam()->GetESDV0Params()->StreamLevel()>0)
243 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
244
245 // only for plane efficiency evaluation
246 if (AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
247 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0) {
248 Int_t iplane=AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff();
249 if(!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(iplane)==1)
250 AliWarning(Form("Evaluation of Plane Eff for layer %d will be attempted without removing it from tracker",iplane));
251 if (iplane<2) fPlaneEff = new AliITSPlaneEffSPD();
252 else if (iplane<4) fPlaneEff = new AliITSPlaneEffSDD();
253 else fPlaneEff = new AliITSPlaneEffSSD();
254 if(AliITSReconstructor::GetRecoParam()->GetReadPlaneEffFromOCDB())
255 if(!fPlaneEff->ReadFromCDB()) {AliWarning("AliITStrackerMI reading of AliITSPlaneEff from OCDB failed") ;}
256 if(AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) fPlaneEff->SetCreateHistos(kTRUE);
257 }
258}
259//------------------------------------------------------------------------
260AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
261fI(tracker.fI),
262fBestTrack(tracker.fBestTrack),
263fTrackToFollow(tracker.fTrackToFollow),
264fTrackHypothesys(tracker.fTrackHypothesys),
265fBestHypothesys(tracker.fBestHypothesys),
266fOriginal(tracker.fOriginal),
267fCurrentEsdTrack(tracker.fCurrentEsdTrack),
268fPass(tracker.fPass),
269fAfterV0(tracker.fAfterV0),
270fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
271fCoefficients(tracker.fCoefficients),
272fEsd(tracker.fEsd),
273fTrackingPhase(tracker.fTrackingPhase),
274fUseTGeo(tracker.fUseTGeo),
275fNtracks(tracker.fNtracks),
276fxOverX0Pipe(tracker.fxOverX0Pipe),
277fxTimesRhoPipe(tracker.fxTimesRhoPipe),
278fxOverX0PipeTrks(0),
279fxTimesRhoPipeTrks(0),
280fxOverX0ShieldTrks(0),
281fxTimesRhoShieldTrks(0),
282fxOverX0LayerTrks(0),
283fxTimesRhoLayerTrks(0),
284fDebugStreamer(tracker.fDebugStreamer),
285fITSChannelStatus(tracker.fITSChannelStatus),
286fkDetTypeRec(tracker.fkDetTypeRec),
287fPlaneEff(tracker.fPlaneEff) {
288 //Copy constructor
289 fOriginal.SetOwner();
290 Int_t i;
291 for(i=0;i<4;i++) {
292 fSPDdetzcentre[i]=tracker.fSPDdetzcentre[i];
293 }
294 for(i=0;i<6;i++) {
295 fxOverX0Layer[i]=tracker.fxOverX0Layer[i];
296 fxTimesRhoLayer[i]=tracker.fxTimesRhoLayer[i];
297 }
298 for(i=0;i<2;i++) {
299 fxOverX0Shield[i]=tracker.fxOverX0Shield[i];
300 fxTimesRhoShield[i]=tracker.fxTimesRhoShield[i];
301 }
302}
303//------------------------------------------------------------------------
304AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
305 //Assignment operator
306 this->~AliITStrackerMI();
307 new(this) AliITStrackerMI(tracker);
308 return *this;
309}
310//------------------------------------------------------------------------
311AliITStrackerMI::~AliITStrackerMI()
312{
313 //
314 //destructor
315 //
316 if (fCoefficients) delete [] fCoefficients;
317 DeleteTrksMaterialLUT();
318 if (fDebugStreamer) {
319 //fDebugStreamer->Close();
320 delete fDebugStreamer;
321 }
322 if(fITSChannelStatus) delete fITSChannelStatus;
323 if(fPlaneEff) delete fPlaneEff;
324}
325//------------------------------------------------------------------------
326void AliITStrackerMI::ReadBadFromDetTypeRec() {
327 //--------------------------------------------------------------------
328 //This function read ITS bad detectors, chips, channels from AliITSDetTypeRec
329 //i.e. from OCDB
330 //--------------------------------------------------------------------
331
332 if(!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return;
333
334 Info("ReadBadFromDetTypeRec","Reading info about bad ITS detectors and channels");
335
336 if(!fkDetTypeRec) Error("ReadBadFromDetTypeRec","AliITSDetTypeRec nof found!\n");
337
338 // ITS channels map
339 if(fITSChannelStatus) delete fITSChannelStatus;
340 fITSChannelStatus = new AliITSChannelStatus(fkDetTypeRec);
341
342 // ITS detectors and chips
343 Int_t i=0,j=0,k=0,ndet=0;
344 for (i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
345 Int_t nBadDetsPerLayer=0;
346 ndet=AliITSgeomTGeo::GetNDetectors(i);
347 for (j=1; j<AliITSgeomTGeo::GetNLadders(i)+1; j++) {
348 for (k=1; k<ndet+1; k++) {
349 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
350 det.ReadBadDetectorAndChips(i-1,(j-1)*ndet + k-1,fkDetTypeRec);
351 if(det.IsBad()) {nBadDetsPerLayer++;}
352 } // end loop on detectors
353 } // end loop on ladders
354 AliInfo(Form("Layer %d: %d bad out of %d",i-1,nBadDetsPerLayer,ndet*AliITSgeomTGeo::GetNLadders(i)));
355 } // end loop on layers
356
357 return;
358}
359//------------------------------------------------------------------------
360Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
361 //--------------------------------------------------------------------
362 //This function loads ITS clusters
363 //--------------------------------------------------------------------
364
365 TClonesArray *clusters = NULL;
366 AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance();
367 clusters=rpcont->FetchClusters(0,cTree);
368 if(!clusters) return 1;
369
370 if(!(rpcont->IsSPDActive() || rpcont->IsSDDActive() || rpcont->IsSSDActive())){
371 AliError("ITS is not in a known running configuration: SPD, SDD and SSD are not active");
372 return 1;
373 }
374 Int_t i=0,j=0,ndet=0;
375 Int_t detector=0;
376 for (i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
377 ndet=fgLayers[i].GetNdetectors();
378 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
379 for (; j<jmax; j++) {
380 // if (!cTree->GetEvent(j)) continue;
381 clusters = rpcont->UncheckedGetClusters(j);
382 if(!clusters)continue;
383 Int_t ncl=clusters->GetEntriesFast();
384 SignDeltas(clusters,GetZ());
385
386 while (ncl--) {
387 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
388 detector=c->GetDetectorIndex();
389
390 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
391
392 Int_t retval = fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
393 if(retval) {
394 AliWarning(Form("Too many clusters on layer %d!",i));
395 break;
396 }
397 }
398
399 // add dead zone "virtual" cluster in SPD, if there is a cluster within
400 // zwindow cm from the dead zone
401 // This method assumes that fSPDdetzcentre is ordered from -z to +z
402 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
403 for (Float_t xdead = 0; xdead < AliITSRecoParam::GetSPDdetxlength(); xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
404 Int_t lab[4] = {0,0,0,detector};
405 Int_t info[3] = {0,0,i};
406 Float_t q = 0.; // this identifies virtual clusters
407 Float_t hit[6] = {xdead,
408 0.,
409 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
410 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
411 q,
412 0.};
413 Bool_t local = kTRUE;
414 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
415 hit[1] = fSPDdetzcentre[0]+0.5*AliITSRecoParam::GetSPDdetzlength();
416 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
417 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
418 hit[1] = fSPDdetzcentre[1]-0.5*AliITSRecoParam::GetSPDdetzlength();
419 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
420 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
421 hit[1] = fSPDdetzcentre[1]+0.5*AliITSRecoParam::GetSPDdetzlength();
422 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
423 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
424 hit[1] = fSPDdetzcentre[2]-0.5*AliITSRecoParam::GetSPDdetzlength();
425 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
426 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
427 hit[1] = fSPDdetzcentre[2]+0.5*AliITSRecoParam::GetSPDdetzlength();
428 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
429 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
430 hit[1] = fSPDdetzcentre[3]-0.5*AliITSRecoParam::GetSPDdetzlength();
431 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
432 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
433 }
434 } // "virtual" clusters in SPD
435
436 }
437 //
438 fgLayers[i].ResetRoad(); //road defined by the cluster density
439 fgLayers[i].SortClusters();
440 }
441
442 // check whether we have to skip some layers
443 SetForceSkippingOfLayer();
444
445 return 0;
446}
447//------------------------------------------------------------------------
448void AliITStrackerMI::UnloadClusters() {
449 //--------------------------------------------------------------------
450 //This function unloads ITS clusters
451 //--------------------------------------------------------------------
452 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
453}
454//------------------------------------------------------------------------
455void AliITStrackerMI::FillClusterArray(TObjArray* array) const {
456 //--------------------------------------------------------------------
457 // Publishes all pointers to clusters known to the tracker into the
458 // passed object array.
459 // The ownership is not transfered - the caller is not expected to delete
460 // the clusters.
461 //--------------------------------------------------------------------
462
463 for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
464 for(Int_t icl=0; icl<fgLayers[i].GetNumberOfClusters(); icl++) {
465 AliCluster *cl = (AliCluster*)fgLayers[i].GetCluster(icl);
466 array->AddLast(cl);
467 }
468 }
469
470 return;
471}
472//------------------------------------------------------------------------
473Int_t AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
474 //--------------------------------------------------------------------
475 // Correction for the material between the TPC and the ITS
476 //--------------------------------------------------------------------
477 if (t->GetX() > AliITSRecoParam::Getriw()) { // inward direction
478 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw(),1)) return 0;// TPC inner wall
479 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
480 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
481 } else if (t->GetX() < AliITSRecoParam::Getrs()) { // outward direction
482 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
483 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
484 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw()+0.001,1)) return 0;// TPC inner wall
485 } else {
486 printf("CorrectForTPCtoITSDeadZoneMaterial: Track is already in the dead zone !\n");
487 return 0;
488 }
489
490 return 1;
491}
492//------------------------------------------------------------------------
493Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
494 //--------------------------------------------------------------------
495 // This functions reconstructs ITS tracks
496 // The clusters must be already loaded !
497 //--------------------------------------------------------------------
498
499 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
500
501 fTrackingPhase="Clusters2Tracks";
502
503 TObjArray itsTracks(15000);
504 fOriginal.Clear();
505 fEsd = event; // store pointer to the esd
506
507 // temporary (for cosmics)
508 if(event->GetVertex()) {
509 TString title = event->GetVertex()->GetTitle();
510 if(title.Contains("cosmics")) {
511 Double_t xyz[3]={GetX(),GetY(),GetZ()};
512 Double_t exyz[3]={0.1,0.1,0.1};
513 SetVertex(xyz,exyz);
514 }
515 }
516 // temporary
517 Int_t noesd = 0;
518 {/* Read ESD tracks */
519 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
520 Int_t nentr=event->GetNumberOfTracks();
521 noesd=nentr;
522 // Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
523 while (nentr--) {
524 AliESDtrack *esd=event->GetTrack(nentr);
525 // ---- for debugging:
526 //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); }
527
528 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
529 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
530 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
531 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
532 AliITStrackMI *t = new AliITStrackMI(*esd);
533 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
534 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
535
536
537 // look at the ESD mass hypothesys !
538 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
539 // write expected q
540 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
541
542 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
543 //track - can be V0 according to TPC
544 } else {
545 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
546 delete t;
547 continue;
548 }
549 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
550 delete t;
551 continue;
552 }
553 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
554 delete t;
555 continue;
556 }
557 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
558 delete t;
559 continue;
560 }
561 }
562 t->SetReconstructed(kFALSE);
563 itsTracks.AddLast(t);
564 fOriginal.AddLast(t);
565 }
566 } /* End Read ESD tracks */
567
568 itsTracks.Sort();
569 fOriginal.Sort();
570 Int_t nentr=itsTracks.GetEntriesFast();
571 fTrackHypothesys.Expand(nentr);
572 fBestHypothesys.Expand(nentr);
573 MakeCoefficients(nentr);
574 if(fUseTGeo==3 || fUseTGeo==4) MakeTrksMaterialLUT(event->GetNumberOfTracks());
575 Int_t ntrk=0;
576 // THE TWO TRACKING PASSES
577 for (fPass=0; fPass<2; fPass++) {
578 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
579 for (fCurrentEsdTrack=0; fCurrentEsdTrack<nentr; fCurrentEsdTrack++) {
580 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(fCurrentEsdTrack);
581 if (t==0) continue; //this track has been already tracked
582 //cout<<"========== "<<fPass<<" "<<fCurrentEsdTrack<<" =========\n";
583 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
584 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
585 if (fConstraint[fPass]) {
586 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
587 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
588 }
589
590 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
591 AliDebug(2,Form("LABEL %d pass %d",tpcLabel,fPass));
592 fI = 6;
593 ResetTrackToFollow(*t);
594 ResetBestTrack();
595
596 FollowProlongationTree(t,fCurrentEsdTrack,fConstraint[fPass]);
597
598
599 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
600 //
601 AliITStrackMI *besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
602 if (!besttrack) continue;
603 besttrack->SetLabel(tpcLabel);
604 // besttrack->CookdEdx();
605 CookdEdx(besttrack);
606 besttrack->SetFakeRatio(1.);
607 CookLabel(besttrack,0.); //For comparison only
608 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
609
610 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
611
612 t->SetReconstructed(kTRUE);
613 ntrk++;
614 AliDebug(2,Form("TRACK! (label %d) ncls %d",besttrack->GetLabel(),besttrack->GetNumberOfClusters()));
615 }
616 GetBestHypothesysMIP(itsTracks);
617 } // end loop on the two tracking passes
618
619 if(event->GetNumberOfV0s()>0) AliITSV0Finder::UpdateTPCV0(event,this);
620 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::FindV02(event,this);
621 fAfterV0 = kTRUE;
622 //
623 itsTracks.Clear();
624 //
625 Int_t entries = fTrackHypothesys.GetEntriesFast();
626 for (Int_t ientry=0; ientry<entries; ientry++) {
627 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
628 if (array) array->Delete();
629 delete fTrackHypothesys.RemoveAt(ientry);
630 }
631
632 fTrackHypothesys.Delete();
633 entries = fBestHypothesys.GetEntriesFast();
634 for (Int_t ientry=0; ientry<entries; ientry++) {
635 TObjArray * array =(TObjArray*)fBestHypothesys.UncheckedAt(ientry);
636 if (array) array->Delete();
637 delete fBestHypothesys.RemoveAt(ientry);
638 }
639 fBestHypothesys.Delete();
640 fOriginal.Clear();
641 delete [] fCoefficients;
642 fCoefficients=0;
643 DeleteTrksMaterialLUT();
644
645 AliInfo(Form("Number of prolonged tracks: %d out of %d ESD tracks",ntrk,noesd));
646
647 fTrackingPhase="Default";
648
649 return 0;
650}
651//------------------------------------------------------------------------
652Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
653 //--------------------------------------------------------------------
654 // This functions propagates reconstructed ITS tracks back
655 // The clusters must be loaded !
656 //--------------------------------------------------------------------
657 fTrackingPhase="PropagateBack";
658 Int_t nentr=event->GetNumberOfTracks();
659 // Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
660
661 Int_t ntrk=0;
662 for (Int_t i=0; i<nentr; i++) {
663 AliESDtrack *esd=event->GetTrack(i);
664
665 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
666 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
667
668 AliITStrackMI *t = new AliITStrackMI(*esd);
669
670 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
671
672 ResetTrackToFollow(*t);
673
674 /*
675 // propagate to vertex [SR, GSI 17.02.2003]
676 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
677 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
678 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
679 fTrackToFollow.StartTimeIntegral();
680 // from vertex to outside pipe
681 CorrectForPipeMaterial(&fTrackToFollow,"outward");
682 }*/
683 // Start time integral and add distance from current position to vertex
684 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
685 fTrackToFollow.GetXYZ(xyzTrk);
686 Double_t dst2 = 0.;
687 for (Int_t icoord=0; icoord<3; icoord++) {
688 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
689 dst2 += di*di;
690 }
691 fTrackToFollow.StartTimeIntegral();
692 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
693
694 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
695 if (RefitAt(AliITSRecoParam::GetrInsideITSscreen(),&fTrackToFollow,t)) {
696 if (!CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)) {
697 delete t;
698 continue;
699 }
700 fTrackToFollow.SetLabel(t->GetLabel());
701 //fTrackToFollow.CookdEdx();
702 CookLabel(&fTrackToFollow,0.); //For comparison only
703 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
704 //UseClusters(&fTrackToFollow);
705 ntrk++;
706 }
707 delete t;
708 }
709
710 AliInfo(Form("Number of back propagated ITS tracks: %d out of %d ESD tracks",ntrk,nentr));
711
712 fTrackingPhase="Default";
713
714 return 0;
715}
716//------------------------------------------------------------------------
717Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
718 //--------------------------------------------------------------------
719 // This functions refits ITS tracks using the
720 // "inward propagated" TPC tracks
721 // The clusters must be loaded !
722 //--------------------------------------------------------------------
723 fTrackingPhase="RefitInward";
724
725 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::RefitV02(event,this);
726
727 Bool_t doExtra=AliITSReconstructor::GetRecoParam()->GetSearchForExtraClusters();
728 if(!doExtra) AliDebug(2,"Do not search for extra clusters");
729
730 Int_t nentr=event->GetNumberOfTracks();
731 // Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
732
733 Int_t ntrk=0;
734 for (Int_t i=0; i<nentr; i++) {
735 AliESDtrack *esd=event->GetTrack(i);
736
737 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
738 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
739 if (esd->GetStatus()&AliESDtrack::kTPCout)
740 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
741
742 AliITStrackMI *t = new AliITStrackMI(*esd);
743
744 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
745 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
746 delete t;
747 continue;
748 }
749
750 ResetTrackToFollow(*t);
751 fTrackToFollow.ResetClusters();
752
753 // ITS standalone tracks
754 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) {
755 fTrackToFollow.ResetCovariance(10.);
756 // protection for loopers that can have parameters screwed up
757 if(TMath::Abs(fTrackToFollow.GetY())>1000. ||
758 TMath::Abs(fTrackToFollow.GetZ())>1000.) {
759 delete t;
760 continue;
761 }
762 }
763
764 //Refitting...
765 Bool_t pe=(AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
766 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0);
767
768 AliDebug(2,Form("Refit LABEL %d %d",t->GetLabel(),t->GetNumberOfClusters()));
769 if (RefitAt(AliITSRecoParam::GetrInsideSPD1(),&fTrackToFollow,t,doExtra,pe)) {
770 AliDebug(2," refit OK");
771 fTrackToFollow.SetLabel(t->GetLabel());
772 // fTrackToFollow.CookdEdx();
773 CookdEdx(&fTrackToFollow);
774
775 CookLabel(&fTrackToFollow,0.0); //For comparison only
776
777 //The beam pipe
778 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
779 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
780 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
781 //printf(" %d\n",esdTrack->GetITSModuleIndex(0));
782 //esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); //original line
783 Double_t r[3]={0.,0.,0.};
784 Double_t maxD=3.;
785 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
786 ntrk++;
787 }
788 }
789 delete t;
790 }
791
792 AliInfo(Form("Number of refitted tracks: %d out of %d ESD tracks",ntrk,nentr));
793
794 fTrackingPhase="Default";
795
796 return 0;
797}
798//------------------------------------------------------------------------
799AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
800 //--------------------------------------------------------------------
801 // Return pointer to a given cluster
802 //--------------------------------------------------------------------
803 Int_t l=(index & 0xf0000000) >> 28;
804 Int_t c=(index & 0x0fffffff) >> 00;
805 return fgLayers[l].GetCluster(c);
806}
807//------------------------------------------------------------------------
808Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
809 //--------------------------------------------------------------------
810 // Get track space point with index i
811 //--------------------------------------------------------------------
812
813 Int_t l=(index & 0xf0000000) >> 28;
814 Int_t c=(index & 0x0fffffff) >> 00;
815 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
816 Int_t idet = cl->GetDetectorIndex();
817
818 Float_t xyz[3];
819 Float_t cov[6];
820 cl->GetGlobalXYZ(xyz);
821 cl->GetGlobalCov(cov);
822 p.SetXYZ(xyz, cov);
823 p.SetCharge(cl->GetQ());
824 p.SetDriftTime(cl->GetDriftTime());
825 p.SetChargeRatio(cl->GetChargeRatio());
826 p.SetClusterType(cl->GetClusterType());
827 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
828 switch (l) {
829 case 0:
830 iLayer = AliGeomManager::kSPD1;
831 break;
832 case 1:
833 iLayer = AliGeomManager::kSPD2;
834 break;
835 case 2:
836 iLayer = AliGeomManager::kSDD1;
837 break;
838 case 3:
839 iLayer = AliGeomManager::kSDD2;
840 break;
841 case 4:
842 iLayer = AliGeomManager::kSSD1;
843 break;
844 case 5:
845 iLayer = AliGeomManager::kSSD2;
846 break;
847 default:
848 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
849 break;
850 };
851 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
852 p.SetVolumeID((UShort_t)volid);
853 return kTRUE;
854}
855//------------------------------------------------------------------------
856Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
857 AliTrackPoint& p, const AliESDtrack *t) {
858 //--------------------------------------------------------------------
859 // Get track space point with index i
860 // (assign error estimated during the tracking)
861 //--------------------------------------------------------------------
862
863 Int_t l=(index & 0xf0000000) >> 28;
864 Int_t c=(index & 0x0fffffff) >> 00;
865 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
866 Int_t idet = cl->GetDetectorIndex();
867
868 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
869
870 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
871 Float_t detxy[2];
872 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
873 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
874 Double_t alpha = t->GetAlpha();
875 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
876 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe+cl->GetX(),GetBz()));
877 phi += alpha-det.GetPhi();
878 Float_t tgphi = TMath::Tan(phi);
879
880 Float_t tgl = t->GetTgl(); // tgl about const along track
881 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
882
883 Float_t errtrky,errtrkz,covyz;
884 Bool_t addMisalErr=kFALSE;
885 AliITSClusterParam::GetError(l,cl,tgl,tgphi,expQ,errtrky,errtrkz,covyz,addMisalErr);
886
887 Float_t xyz[3];
888 Float_t cov[6];
889 cl->GetGlobalXYZ(xyz);
890 // cl->GetGlobalCov(cov);
891 Float_t pos[3] = {0.,0.,0.};
892 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errtrky*errtrky,errtrkz*errtrkz,covyz);
893 tmpcl.GetGlobalCov(cov);
894
895 p.SetXYZ(xyz, cov);
896 p.SetCharge(cl->GetQ());
897 p.SetDriftTime(cl->GetDriftTime());
898 p.SetChargeRatio(cl->GetChargeRatio());
899 p.SetClusterType(cl->GetClusterType());
900
901 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
902 switch (l) {
903 case 0:
904 iLayer = AliGeomManager::kSPD1;
905 break;
906 case 1:
907 iLayer = AliGeomManager::kSPD2;
908 break;
909 case 2:
910 iLayer = AliGeomManager::kSDD1;
911 break;
912 case 3:
913 iLayer = AliGeomManager::kSDD2;
914 break;
915 case 4:
916 iLayer = AliGeomManager::kSSD1;
917 break;
918 case 5:
919 iLayer = AliGeomManager::kSSD2;
920 break;
921 default:
922 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
923 break;
924 };
925 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
926
927 p.SetVolumeID((UShort_t)volid);
928 return kTRUE;
929}
930//------------------------------------------------------------------------
931void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
932{
933 //--------------------------------------------------------------------
934 // Follow prolongation tree
935 //--------------------------------------------------------------------
936 //
937 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
938 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
939
940
941 AliESDtrack * esd = otrack->GetESDtrack();
942 if (esd->GetV0Index(0)>0) {
943 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
944 // mapping of ESD track is different as ITS track in Containers
945 // Need something more stable
946 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
947 for (Int_t i=0;i<3;i++){
948 Int_t index = esd->GetV0Index(i);
949 if (index==0) break;
950 AliESDv0 * vertex = fEsd->GetV0(index);
951 if (vertex->GetStatus()<0) continue; // rejected V0
952 //
953 if (esd->GetSign()>0) {
954 vertex->SetIndex(0,esdindex);
955 } else {
956 vertex->SetIndex(1,esdindex);
957 }
958 }
959 }
960 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
961 if (!bestarray){
962 bestarray = new TObjArray(5);
963 bestarray->SetOwner();
964 fBestHypothesys.AddAt(bestarray,esdindex);
965 }
966
967 //
968 //setup tree of the prolongations
969 //
970 static AliITStrackMI tracks[7][100];
971 AliITStrackMI *currenttrack;
972 static AliITStrackMI currenttrack1;
973 static AliITStrackMI currenttrack2;
974 static AliITStrackMI backuptrack;
975 Int_t ntracks[7];
976 Int_t nindexes[7][100];
977 Float_t normalizedchi2[100];
978 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
979 otrack->SetNSkipped(0);
980 new (&(tracks[6][0])) AliITStrackMI(*otrack);
981 ntracks[6]=1;
982 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
983 Int_t modstatus = 1; // found
984 Float_t xloc,zloc;
985 //
986 //
987 // follow prolongations
988 for (Int_t ilayer=5; ilayer>=0; ilayer--) {
989 AliDebug(2,Form("FollowProlongationTree: layer %d",ilayer));
990 fI = ilayer;
991 //
992 AliITSlayer &layer=fgLayers[ilayer];
993 Double_t r = layer.GetR();
994 ntracks[ilayer]=0;
995 //
996 //
997 Int_t nskipped=0;
998 Float_t nused =0;
999 for (Int_t itrack =0; itrack<ntracks[ilayer+1]; itrack++) {
1000 //set current track
1001 if (ntracks[ilayer]>=100) break;
1002 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
1003 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
1004 if (ntracks[ilayer]>15+ilayer){
1005 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
1006 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
1007 }
1008
1009 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
1010
1011 // material between SSD and SDD, SDD and SPD
1012 if (ilayer==3)
1013 if(!CorrectForShieldMaterial(&currenttrack1,"SDD","inward")) continue;
1014 if (ilayer==1)
1015 if(!CorrectForShieldMaterial(&currenttrack1,"SPD","inward")) continue;
1016
1017 // detector number
1018 Double_t phi,z;
1019 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
1020 Int_t idet=layer.FindDetectorIndex(phi,z);
1021
1022 Double_t trackGlobXYZ1[3];
1023 if (!currenttrack1.GetXYZ(trackGlobXYZ1)) continue;
1024
1025 // Get the budget to the primary vertex for the current track being prolonged
1026 Double_t budgetToPrimVertex = GetEffectiveThickness();
1027
1028 // check if we allow a prolongation without point
1029 Int_t skip = CheckSkipLayer(&currenttrack1,ilayer,idet);
1030 if (skip) {
1031 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1032 // propagate to the layer radius
1033 Double_t xToGo; if (!vtrack->GetLocalXat(r,xToGo)) continue;
1034 if(!vtrack->Propagate(xToGo)) continue;
1035 // apply correction for material of the current layer
1036 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1037 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
1038 vtrack->SetDeadZoneProbability(ilayer,1.); // no penalty for missing cluster
1039 vtrack->SetClIndex(ilayer,-1);
1040 modstatus = (skip==1 ? 3 : 4); // skipped : out in z
1041 if(LocalModuleCoord(ilayer,idet,vtrack,xloc,zloc)) { // local module coords
1042 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1043 }
1044 if(constrain && AliITSReconstructor::GetRecoParam()->GetImproveWithVertex()) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1045 ntracks[ilayer]++;
1046 continue;
1047 }
1048
1049 // track outside layer acceptance in z
1050 if (idet<0) continue;
1051
1052 //propagate to the intersection with the detector plane
1053 const AliITSdetector &det=layer.GetDetector(idet);
1054 new(&currenttrack2) AliITStrackMI(currenttrack1);
1055 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
1056 if (!currenttrack2.Propagate(det.GetPhi(),det.GetR())) continue;
1057 currenttrack1.SetDetectorIndex(idet);
1058 currenttrack2.SetDetectorIndex(idet);
1059 if(!LocalModuleCoord(ilayer,idet,&currenttrack1,xloc,zloc)) continue; // local module coords
1060
1061 //***************
1062 // DEFINITION OF SEARCH ROAD AND CLUSTERS SELECTION
1063 //
1064 // road in global (rphi,z) [i.e. in tracking ref. system]
1065 Double_t zmin,zmax,ymin,ymax;
1066 if (!ComputeRoad(&currenttrack1,ilayer,idet,zmin,zmax,ymin,ymax)) continue;
1067
1068 // select clusters in road
1069 layer.SelectClusters(zmin,zmax,ymin,ymax);
1070 //********************
1071
1072 // Define criteria for track-cluster association
1073 Double_t msz = currenttrack1.GetSigmaZ2() +
1074 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1075 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1076 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
1077 Double_t msy = currenttrack1.GetSigmaY2() +
1078 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1079 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1080 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
1081 if (constrain) {
1082 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
1083 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
1084 } else {
1085 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
1086 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
1087 }
1088 msz = 1./msz; // 1/RoadZ^2
1089 msy = 1./msy; // 1/RoadY^2
1090
1091 //
1092 //
1093 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
1094 //
1095 const AliITSRecPoint *cl=0;
1096 Int_t clidx=-1;
1097 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
1098 Bool_t deadzoneSPD=kFALSE;
1099 currenttrack = &currenttrack1;
1100
1101 // check if the road contains a dead zone
1102 Bool_t noClusters = kFALSE;
1103 if (!layer.GetNextCluster(clidx,kTRUE)) noClusters=kTRUE;
1104 if (noClusters) AliDebug(2,"no clusters in road");
1105 Double_t dz=0.5*(zmax-zmin);
1106 Double_t dy=0.5*(ymax-ymin);
1107 Int_t dead = CheckDeadZone(&currenttrack1,ilayer,idet,dz,dy,noClusters);
1108 if(dead) AliDebug(2,Form("DEAD (%d)\n",dead));
1109 // create a prolongation without clusters (check also if there are no clusters in the road)
1110 if (dead ||
1111 (noClusters &&
1112 AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad())) {
1113 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1114 updatetrack->SetClIndex(ilayer,-1);
1115 if (dead==0) {
1116 modstatus = 5; // no cls in road
1117 } else if (dead==1) {
1118 modstatus = 7; // holes in z in SPD
1119 } else if (dead==2 || dead==3 || dead==4) {
1120 modstatus = 2; // dead from OCDB
1121 }
1122 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1123 // apply correction for material of the current layer
1124 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1125 if (constrain) { // apply vertex constrain
1126 updatetrack->SetConstrain(constrain);
1127 Bool_t isPrim = kTRUE;
1128 if (ilayer<4) { // check that it's close to the vertex
1129 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1130 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1131 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1132 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1133 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1134 }
1135 if (isPrim && AliITSReconstructor::GetRecoParam()->GetImproveWithVertex()) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1136 }
1137 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1138 if (dead) {
1139 if (dead==1) { // dead zone at z=0,+-7cm in SPD
1140 updatetrack->SetDeadZoneProbability(ilayer,GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1141 deadzoneSPD=kTRUE;
1142 } else if (dead==2 || dead==3) { // dead module or chip from OCDB
1143 updatetrack->SetDeadZoneProbability(ilayer,1.);
1144 } else if (dead==4) { // at least a single dead channel from OCDB
1145 updatetrack->SetDeadZoneProbability(ilayer,0.);
1146 }
1147 }
1148 ntracks[ilayer]++;
1149 }
1150
1151 clidx=-1;
1152 // loop over clusters in the road
1153 while ((cl=layer.GetNextCluster(clidx))!=0) {
1154 if (ntracks[ilayer]>95) break; //space for skipped clusters
1155 Bool_t changedet =kFALSE;
1156 if (TMath::Abs(cl->GetQ())<1.e-13 && deadzoneSPD==kTRUE) continue;
1157 Int_t idetc=cl->GetDetectorIndex();
1158
1159 if (currenttrack->GetDetectorIndex()==idetc) { // track already on the cluster's detector
1160 // take into account misalignment (bring track to real detector plane)
1161 Double_t xTrOrig = currenttrack->GetX();
1162 if (!currenttrack->Propagate(xTrOrig+cl->GetX())) continue;
1163 // a first cut on track-cluster distance
1164 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
1165 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
1166 { // cluster not associated to track
1167 AliDebug(2,"not associated");
1168 // MvL: added here as well
1169 // bring track back to ideal detector plane
1170 currenttrack->Propagate(xTrOrig);
1171 continue;
1172 }
1173 // bring track back to ideal detector plane
1174 if (!currenttrack->Propagate(xTrOrig)) continue;
1175 } else { // have to move track to cluster's detector
1176 const AliITSdetector &detc=layer.GetDetector(idetc);
1177 // a first cut on track-cluster distance
1178 Double_t y;
1179 if (!currenttrack2.GetProlongationFast(detc.GetPhi(),detc.GetR()+cl->GetX(),y,z)) continue;
1180 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
1181 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
1182 continue; // cluster not associated to track
1183 //
1184 new (&backuptrack) AliITStrackMI(currenttrack2);
1185 changedet = kTRUE;
1186 currenttrack =&currenttrack2;
1187 if (!currenttrack->Propagate(detc.GetPhi(),detc.GetR())) {
1188 new (currenttrack) AliITStrackMI(backuptrack);
1189 changedet = kFALSE;
1190 continue;
1191 }
1192 currenttrack->SetDetectorIndex(idetc);
1193 // Get again the budget to the primary vertex
1194 // for the current track being prolonged, if had to change detector
1195 //budgetToPrimVertex = GetEffectiveThickness();// not needed at the moment because anyway we take a mean material for this correction
1196 }
1197
1198 // calculate track-clusters chi2
1199 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
1200 // chi2 cut
1201 AliDebug(2,Form("chi2 %f max %f",chi2trkcl,AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)));
1202 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
1203 if (TMath::Abs(cl->GetQ())<1.e-13) deadzoneSPD=kTRUE; // only 1 prolongation with virtual cluster
1204 if (ntracks[ilayer]>=100) continue;
1205 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1206 updatetrack->SetClIndex(ilayer,-1);
1207 if (changedet) new (&currenttrack2) AliITStrackMI(backuptrack);
1208
1209 if (TMath::Abs(cl->GetQ())>1.e-13) { // real cluster
1210 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) {
1211 AliDebug(2,"update failed");
1212 continue;
1213 }
1214 updatetrack->SetSampledEdx(cl->GetQ(),ilayer-2);
1215 modstatus = 1; // found
1216 } else { // virtual cluster in dead zone
1217 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1218 updatetrack->SetDeadZoneProbability(ilayer,GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1219 modstatus = 7; // holes in z in SPD
1220 }
1221
1222 if (changedet) {
1223 Float_t xlocnewdet,zlocnewdet;
1224 if(LocalModuleCoord(ilayer,idet,updatetrack,xlocnewdet,zlocnewdet)) { // local module coords
1225 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xlocnewdet,zlocnewdet);
1226 }
1227 } else {
1228 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1229 }
1230 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1231
1232 // apply correction for material of the current layer
1233 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1234
1235 if (constrain) { // apply vertex constrain
1236 updatetrack->SetConstrain(constrain);
1237 Bool_t isPrim = kTRUE;
1238 if (ilayer<4) { // check that it's close to the vertex
1239 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1240 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1241 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1242 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1243 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1244 }
1245 if (isPrim && AliITSReconstructor::GetRecoParam()->GetImproveWithVertex()) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1246 } //apply vertex constrain
1247 ntracks[ilayer]++;
1248 } // create new hypothesis
1249 else {
1250 AliDebug(2,"chi2 too large");
1251 }
1252
1253 } // loop over possible prolongations
1254
1255 // allow one prolongation without clusters
1256 if (constrain && itrack<=1 && TMath::Abs(currenttrack1.GetNSkipped())<1.e-13 && deadzoneSPD==kFALSE && ntracks[ilayer]<100) {
1257 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1258 // apply correction for material of the current layer
1259 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1260 vtrack->SetClIndex(ilayer,-1);
1261 modstatus = 3; // skipped
1262 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1263 if(AliITSReconstructor::GetRecoParam()->GetImproveWithVertex()) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1264 vtrack->IncrementNSkipped();
1265 ntracks[ilayer]++;
1266 }
1267
1268
1269 } // loop over tracks in layer ilayer+1
1270
1271 //loop over track candidates for the current layer
1272 //
1273 //
1274 Int_t accepted=0;
1275
1276 Int_t golden=0;
1277 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1278 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
1279 if (normalizedchi2[itrack] <
1280 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
1281 if (ilayer>4) {
1282 accepted++;
1283 } else {
1284 if (constrain) { // constrain
1285 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1286 accepted++;
1287 } else { // !constrain
1288 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1289 accepted++;
1290 }
1291 }
1292 }
1293 // sort tracks by increasing normalized chi2
1294 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
1295 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
1296 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
1297 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
1298 } // end loop over layers
1299
1300
1301 //
1302 // Now select tracks to be kept
1303 //
1304 Int_t max = constrain ? 20 : 5;
1305
1306 // tracks that reach layer 0 (SPD inner)
1307 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
1308 AliITStrackMI & track= tracks[0][nindexes[0][i]];
1309 if (track.GetNumberOfClusters()<2) continue;
1310 if (!constrain && track.GetNormChi2(0) >
1311 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) {
1312 continue;
1313 }
1314 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1315 }
1316
1317 // tracks that reach layer 1 (SPD outer)
1318 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
1319 AliITStrackMI & track= tracks[1][nindexes[1][i]];
1320 if (track.GetNumberOfClusters()<4) continue;
1321 if (!constrain && track.GetNormChi2(1) >
1322 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1323 if (constrain) track.IncrementNSkipped();
1324 if (!constrain) {
1325 track.SetD(0,track.GetD(GetX(),GetY()));
1326 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
1327 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1328 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1329 }
1330 }
1331 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1332 }
1333
1334 // tracks that reach layer 2 (SDD inner), only during non-constrained pass
1335 if (!constrain){
1336 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
1337 AliITStrackMI & track= tracks[2][nindexes[2][i]];
1338 if (track.GetNumberOfClusters()<3) continue;
1339 if (track.GetNormChi2(2) >
1340 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1341 track.SetD(0,track.GetD(GetX(),GetY()));
1342 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
1343 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1344 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1345 }
1346 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1347 }
1348 }
1349
1350 if (!constrain) {
1351 //
1352 // register best track of each layer - important for V0 finder
1353 //
1354 for (Int_t ilayer=0;ilayer<5;ilayer++){
1355 if (ntracks[ilayer]==0) continue;
1356 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1357 if (track.GetNumberOfClusters()<1) continue;
1358 CookLabel(&track,0);
1359 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1360 }
1361 }
1362 //
1363 // update TPC V0 information
1364 //
1365 if (otrack->GetESDtrack()->GetV0Index(0)>0){
1366 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1367 for (Int_t i=0;i<3;i++){
1368 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
1369 if (index==0) break;
1370 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
1371 if (vertex->GetStatus()<0) continue; // rejected V0
1372 //
1373 if (otrack->GetSign()>0) {
1374 vertex->SetIndex(0,esdindex);
1375 }
1376 else{
1377 vertex->SetIndex(1,esdindex);
1378 }
1379 //find nearest layer with track info
1380 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1381 Int_t nearestold = GetNearestLayer(xrp); //I.B.
1382 Int_t nearest = nearestold;
1383 for (Int_t ilayer =nearest;ilayer<7;ilayer++){
1384 if (ntracks[nearest]==0){
1385 nearest = ilayer;
1386 }
1387 }
1388 //
1389 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1390 if (nearestold<5&&nearest<5){
1391 Bool_t accept = track.GetNormChi2(nearest)<10;
1392 if (accept){
1393 if (track.GetSign()>0) {
1394 vertex->SetParamP(track);
1395 vertex->Update(fprimvertex);
1396 //vertex->SetIndex(0,track.fESDtrack->GetID());
1397 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1398 }else{
1399 vertex->SetParamN(track);
1400 vertex->Update(fprimvertex);
1401 //vertex->SetIndex(1,track.fESDtrack->GetID());
1402 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1403 }
1404 vertex->SetStatus(vertex->GetStatus()+1);
1405 }else{
1406 //vertex->SetStatus(-2); // reject V0 - not enough clusters
1407 }
1408 }
1409 }
1410 }
1411
1412}
1413//------------------------------------------------------------------------
1414AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1415{
1416 //--------------------------------------------------------------------
1417 //
1418 //
1419 return fgLayers[layer];
1420}
1421//------------------------------------------------------------------------
1422AliITStrackerMI::AliITSlayer::AliITSlayer():
1423fR(0),
1424fPhiOffset(0),
1425fNladders(0),
1426fZOffset(0),
1427fNdetectors(0),
1428fDetectors(0),
1429fN(0),
1430fDy5(0),
1431fDy10(0),
1432fDy20(0),
1433fClustersCs(0),
1434fClusterIndexCs(0),
1435fYcs(0),
1436fZcs(0),
1437fNcs(0),
1438fCurrentSlice(-1),
1439fZmin(0),
1440fZmax(0),
1441fYmin(0),
1442fYmax(0),
1443fI(0),
1444fImax(0),
1445fSkip(0),
1446fAccepted(0),
1447fRoad(0),
1448fMaxSigmaClY(0),
1449fMaxSigmaClZ(0),
1450fNMaxSigmaCl(3)
1451{
1452 //--------------------------------------------------------------------
1453 //default AliITSlayer constructor
1454 //--------------------------------------------------------------------
1455 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1456 fClusterWeight[i]=0;
1457 fClusterTracks[0][i]=-1;
1458 fClusterTracks[1][i]=-1;
1459 fClusterTracks[2][i]=-1;
1460 fClusterTracks[3][i]=-1;
1461 fY[i]=0;
1462 fZ[i]=0;
1463 }
1464 fYB[0]=0;
1465 fYB[1]=0;
1466
1467 for (Int_t j=0; j<AliITSRecoParam::fgkMaxClusterPerLayer5; j++) {
1468 for (Int_t j1=0; j1<6; j1++) {
1469 fClusters5[j1][j]=0;
1470 fClusterIndex5[j1][j]=-1;
1471 fY5[j1][j]=0;
1472 fZ5[j1][j]=0;
1473 fN5[j1]=0;
1474 fBy5[j1][0]=0;
1475 fBy5[j1][1]=0;
1476 }
1477 }
1478
1479 for (Int_t j=0; j<AliITSRecoParam::fgkMaxClusterPerLayer10; j++) {
1480 for (Int_t j1=0; j1<11; j1++) {
1481 fClusters10[j1][j]=0;
1482 fClusterIndex10[j1][j]=-1;
1483 fY10[j1][j]=0;
1484 fZ10[j1][j]=0;
1485 fN10[j1]=0;
1486 fBy10[j1][0]=0;
1487 fBy10[j1][1]=0;
1488 }
1489 }
1490
1491 for (Int_t j=0; j<AliITSRecoParam::fgkMaxClusterPerLayer20; j++) {
1492 for (Int_t j1=0; j1<21; j1++) {
1493 fClusters20[j1][j]=0;
1494 fClusterIndex20[j1][j]=-1;
1495 fY20[j1][j]=0;
1496 fZ20[j1][j]=0;
1497 fN20[j1]=0;
1498 fBy20[j1][0]=0;
1499 fBy20[j1][1]=0;
1500 }
1501 }
1502
1503
1504}
1505//------------------------------------------------------------------------
1506AliITStrackerMI::AliITSlayer::
1507AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1508fR(r),
1509fPhiOffset(p),
1510fNladders(nl),
1511fZOffset(z),
1512fNdetectors(nd),
1513fDetectors(0),
1514fN(0),
1515fDy5(0),
1516fDy10(0),
1517fDy20(0),
1518fClustersCs(0),
1519fClusterIndexCs(0),
1520fYcs(0),
1521fZcs(0),
1522fNcs(0),
1523fCurrentSlice(-1),
1524fZmin(0),
1525fZmax(0),
1526fYmin(0),
1527fYmax(0),
1528fI(0),
1529fImax(0),
1530fSkip(0),
1531fAccepted(0),
1532fRoad(0),
1533fMaxSigmaClY(0),
1534fMaxSigmaClZ(0),
1535fNMaxSigmaCl(3) {
1536 //--------------------------------------------------------------------
1537 //main AliITSlayer constructor
1538 //--------------------------------------------------------------------
1539 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1540 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
1541
1542 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1543 fClusterWeight[i]=0;
1544 fClusterTracks[0][i]=-1;
1545 fClusterTracks[1][i]=-1;
1546 fClusterTracks[2][i]=-1;
1547 fClusterTracks[3][i]=-1;
1548 fY[i]=0;
1549 fZ[i]=0;
1550 }
1551
1552 fYB[0]=0;
1553 fYB[1]=0;
1554
1555 for (Int_t j=0; j<AliITSRecoParam::fgkMaxClusterPerLayer5; j++) {
1556 for (Int_t j1=0; j1<6; j1++) {
1557 fClusters5[j1][j]=0;
1558 fClusterIndex5[j1][j]=-1;
1559 fY5[j1][j]=0;
1560 fZ5[j1][j]=0;
1561 fN5[j1]=0;
1562 fBy5[j1][0]=0;
1563 fBy5[j1][1]=0;
1564 }
1565 }
1566
1567 for (Int_t j=0; j<AliITSRecoParam::fgkMaxClusterPerLayer10; j++) {
1568 for (Int_t j1=0; j1<11; j1++) {
1569 fClusters10[j1][j]=0;
1570 fClusterIndex10[j1][j]=-1;
1571 fY10[j1][j]=0;
1572 fZ10[j1][j]=0;
1573 fN10[j1]=0;
1574 fBy10[j1][0]=0;
1575 fBy10[j1][1]=0;
1576 }
1577 }
1578
1579 for (Int_t j=0; j<AliITSRecoParam::fgkMaxClusterPerLayer20; j++) {
1580 for (Int_t j1=0; j1<21; j1++) {
1581 fClusters20[j1][j]=0;
1582 fClusterIndex20[j1][j]=-1;
1583 fY20[j1][j]=0;
1584 fZ20[j1][j]=0;
1585 fN20[j1]=0;
1586 fBy20[j1][0]=0;
1587 fBy20[j1][1]=0;
1588 }
1589 }
1590
1591}
1592//------------------------------------------------------------------------
1593AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1594fR(layer.fR),
1595fPhiOffset(layer.fPhiOffset),
1596fNladders(layer.fNladders),
1597fZOffset(layer.fZOffset),
1598fNdetectors(layer.fNdetectors),
1599fDetectors(layer.fDetectors),
1600fN(layer.fN),
1601fDy5(layer.fDy5),
1602fDy10(layer.fDy10),
1603fDy20(layer.fDy20),
1604fClustersCs(layer.fClustersCs),
1605fClusterIndexCs(layer.fClusterIndexCs),
1606fYcs(layer.fYcs),
1607fZcs(layer.fZcs),
1608fNcs(layer.fNcs),
1609fCurrentSlice(layer.fCurrentSlice),
1610fZmin(layer.fZmin),
1611fZmax(layer.fZmax),
1612fYmin(layer.fYmin),
1613fYmax(layer.fYmax),
1614fI(layer.fI),
1615fImax(layer.fImax),
1616fSkip(layer.fSkip),
1617fAccepted(layer.fAccepted),
1618fRoad(layer.fRoad),
1619fMaxSigmaClY(layer.fMaxSigmaClY),
1620fMaxSigmaClZ(layer.fMaxSigmaClZ),
1621fNMaxSigmaCl(layer.fNMaxSigmaCl)
1622{
1623 //Copy constructor
1624}
1625//------------------------------------------------------------------------
1626AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1627 //--------------------------------------------------------------------
1628 // AliITSlayer destructor
1629 //--------------------------------------------------------------------
1630 delete [] fDetectors;
1631 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1632 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1633 fClusterWeight[i]=0;
1634 fClusterTracks[0][i]=-1;
1635 fClusterTracks[1][i]=-1;
1636 fClusterTracks[2][i]=-1;
1637 fClusterTracks[3][i]=-1;
1638 }
1639}
1640//------------------------------------------------------------------------
1641void AliITStrackerMI::AliITSlayer::ResetClusters() {
1642 //--------------------------------------------------------------------
1643 // This function removes loaded clusters
1644 //--------------------------------------------------------------------
1645 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1646 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++){
1647 fClusterWeight[i]=0;
1648 fClusterTracks[0][i]=-1;
1649 fClusterTracks[1][i]=-1;
1650 fClusterTracks[2][i]=-1;
1651 fClusterTracks[3][i]=-1;
1652 }
1653
1654 fN=0;
1655 fI=0;
1656}
1657//------------------------------------------------------------------------
1658void AliITStrackerMI::AliITSlayer::ResetWeights() {
1659 //--------------------------------------------------------------------
1660 // This function reset weights of the clusters
1661 //--------------------------------------------------------------------
1662 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1663 fClusterWeight[i]=0;
1664 fClusterTracks[0][i]=-1;
1665 fClusterTracks[1][i]=-1;
1666 fClusterTracks[2][i]=-1;
1667 fClusterTracks[3][i]=-1;
1668 }
1669 for (Int_t i=0; i<fN;i++) {
1670 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1671 if (cl&&cl->IsUsed()) cl->Use();
1672 }
1673
1674}
1675//------------------------------------------------------------------------
1676void AliITStrackerMI::AliITSlayer::ResetRoad() {
1677 //--------------------------------------------------------------------
1678 // This function calculates the road defined by the cluster density
1679 //--------------------------------------------------------------------
1680 Int_t n=0;
1681 for (Int_t i=0; i<fN; i++) {
1682 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1683 }
1684 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
1685}
1686//------------------------------------------------------------------------
1687Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
1688 //--------------------------------------------------------------------
1689 //This function adds a cluster to this layer
1690 //--------------------------------------------------------------------
1691 if (fN==AliITSRecoParam::GetMaxClusterPerLayer()) {
1692 return 1;
1693 }
1694 fCurrentSlice=-1;
1695 fClusters[fN]=cl;
1696 fN++;
1697 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
1698 //AD
1699 Double_t nSigmaY=fNMaxSigmaCl*TMath::Sqrt(cl->GetSigmaY2());
1700 Double_t nSigmaZ=fNMaxSigmaCl*TMath::Sqrt(cl->GetSigmaZ2());
1701 if (cl->GetY()-nSigmaY<det.GetYmin()) det.SetYmin(cl->GetY()-nSigmaY);
1702 if (cl->GetY()+nSigmaY>det.GetYmax()) det.SetYmax(cl->GetY()+nSigmaY);
1703 if (cl->GetZ()-nSigmaZ<det.GetZmin()) det.SetZmin(cl->GetZ()-nSigmaZ);
1704 if (cl->GetZ()+nSigmaZ>det.GetZmax()) det.SetZmax(cl->GetZ()+nSigmaZ);
1705 //AD
1706 /*
1707 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1708 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1709 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1710 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
1711 */
1712 return 0;
1713}
1714//------------------------------------------------------------------------
1715void AliITStrackerMI::AliITSlayer::SortClusters()
1716{
1717 //
1718 //sort clusters
1719 //
1720 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1721 Float_t *z = new Float_t[fN];
1722 Int_t * index = new Int_t[fN];
1723 //
1724 fMaxSigmaClY=0.; //AD
1725 fMaxSigmaClZ=0.; //AD
1726
1727 for (Int_t i=0;i<fN;i++){
1728 z[i] = fClusters[i]->GetZ();
1729 // save largest errors in y and z for this layer
1730 fMaxSigmaClY=TMath::Max(fMaxSigmaClY,TMath::Sqrt(fClusters[i]->GetSigmaY2()));
1731 fMaxSigmaClZ=TMath::Max(fMaxSigmaClZ,TMath::Sqrt(fClusters[i]->GetSigmaZ2()));
1732 }
1733 TMath::Sort(fN,z,index,kFALSE);
1734 for (Int_t i=0;i<fN;i++){
1735 clusters[i] = fClusters[index[i]];
1736 }
1737 //
1738 for (Int_t i=0;i<fN;i++){
1739 fClusters[i] = clusters[i];
1740 fZ[i] = fClusters[i]->GetZ();
1741 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1742 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1743 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1744 fY[i] = y;
1745 }
1746 delete[] index;
1747 delete[] z;
1748 delete[] clusters;
1749 //
1750
1751 fYB[0]=10000000;
1752 fYB[1]=-10000000;
1753 for (Int_t i=0;i<fN;i++){
1754 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1755 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1756 fClusterIndex[i] = i;
1757 }
1758 //
1759 // fill slices
1760 fDy5 = (fYB[1]-fYB[0])/5.;
1761 fDy10 = (fYB[1]-fYB[0])/10.;
1762 fDy20 = (fYB[1]-fYB[0])/20.;
1763 for (Int_t i=0;i<6;i++) fN5[i] =0;
1764 for (Int_t i=0;i<11;i++) fN10[i]=0;
1765 for (Int_t i=0;i<21;i++) fN20[i]=0;
1766 //
1767 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;}
1768 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;}
1769 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;}
1770 //
1771 //
1772 for (Int_t i=0;i<fN;i++)
1773 for (Int_t irot=-1;irot<=1;irot++){
1774 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1775 // slice 5
1776 for (Int_t slice=0; slice<6;slice++){
1777 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<AliITSRecoParam::GetMaxClusterPerLayer5()){
1778 fClusters5[slice][fN5[slice]] = fClusters[i];
1779 fY5[slice][fN5[slice]] = curY;
1780 fZ5[slice][fN5[slice]] = fZ[i];
1781 fClusterIndex5[slice][fN5[slice]]=i;
1782 fN5[slice]++;
1783 }
1784 }
1785 // slice 10
1786 for (Int_t slice=0; slice<11;slice++){
1787 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<AliITSRecoParam::GetMaxClusterPerLayer10()){
1788 fClusters10[slice][fN10[slice]] = fClusters[i];
1789 fY10[slice][fN10[slice]] = curY;
1790 fZ10[slice][fN10[slice]] = fZ[i];
1791 fClusterIndex10[slice][fN10[slice]]=i;
1792 fN10[slice]++;
1793 }
1794 }
1795 // slice 20
1796 for (Int_t slice=0; slice<21;slice++){
1797 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<AliITSRecoParam::GetMaxClusterPerLayer20()){
1798 fClusters20[slice][fN20[slice]] = fClusters[i];
1799 fY20[slice][fN20[slice]] = curY;
1800 fZ20[slice][fN20[slice]] = fZ[i];
1801 fClusterIndex20[slice][fN20[slice]]=i;
1802 fN20[slice]++;
1803 }
1804 }
1805 }
1806
1807 //
1808 // consistency check
1809 //
1810 for (Int_t i=0;i<fN-1;i++){
1811 if (fZ[i]>fZ[i+1]){
1812 printf("Bug\n");
1813 }
1814 }
1815 //
1816 for (Int_t slice=0;slice<21;slice++)
1817 for (Int_t i=0;i<fN20[slice]-1;i++){
1818 if (fZ20[slice][i]>fZ20[slice][i+1]){
1819 printf("Bug\n");
1820 }
1821 }
1822
1823
1824}
1825//------------------------------------------------------------------------
1826Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1827 //--------------------------------------------------------------------
1828 // This function returns the index of the nearest cluster
1829 //--------------------------------------------------------------------
1830 Int_t ncl=0;
1831 const Float_t *zcl;
1832 if (fCurrentSlice<0) {
1833 ncl = fN;
1834 zcl = fZ;
1835 }
1836 else{
1837 ncl = fNcs;
1838 zcl = fZcs;;
1839 }
1840
1841 if (ncl==0) return 0;
1842 Int_t b=0, e=ncl-1, m=(b+e)/2;
1843 for (; b<e; m=(b+e)/2) {
1844 // if (z > fClusters[m]->GetZ()) b=m+1;
1845 if (z > zcl[m]) b=m+1;
1846 else e=m;
1847 }
1848 return m;
1849}
1850//------------------------------------------------------------------------
1851Bool_t AliITStrackerMI::ComputeRoad(AliITStrackMI* track,Int_t ilayer,Int_t idet,Double_t &zmin,Double_t &zmax,Double_t &ymin,Double_t &ymax) const {
1852 //--------------------------------------------------------------------
1853 // This function computes the rectangular road for this track
1854 //--------------------------------------------------------------------
1855
1856
1857 AliITSdetector &det = fgLayers[ilayer].GetDetector(idet);
1858 // take into account the misalignment: propagate track to misaligned detector plane
1859 if (!track->Propagate(det.GetPhi(),det.GetRmisal())) return kFALSE;
1860
1861 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
1862 TMath::Sqrt(track->GetSigmaZ2() +
1863 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1864 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1865 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
1866 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
1867 TMath::Sqrt(track->GetSigmaY2() +
1868 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1869 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1870 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
1871
1872 // track at boundary between detectors, enlarge road
1873 Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidth();
1874 if ( (track->GetY()-dy < det.GetYmin()+boundaryWidth) ||
1875 (track->GetY()+dy > det.GetYmax()-boundaryWidth) ||
1876 (track->GetZ()-dz < det.GetZmin()+boundaryWidth) ||
1877 (track->GetZ()+dz > det.GetZmax()-boundaryWidth) ) {
1878 Float_t tgl = TMath::Abs(track->GetTgl());
1879 if (tgl > 1.) tgl=1.;
1880 Double_t deltaXNeighbDets=AliITSRecoParam::GetDeltaXNeighbDets();
1881 dz = TMath::Sqrt(dz*dz+deltaXNeighbDets*deltaXNeighbDets*tgl*tgl);
1882 Float_t snp = TMath::Abs(track->GetSnp());
1883 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) return kFALSE;
1884 dy = TMath::Sqrt(dy*dy+deltaXNeighbDets*deltaXNeighbDets*snp*snp);
1885 } // boundary
1886
1887 // add to the road a term (up to 2-3 mm) to deal with misalignments
1888 dy = TMath::Sqrt(dy*dy + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1889 dz = TMath::Sqrt(dz*dz + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1890
1891 Double_t r = fgLayers[ilayer].GetR();
1892 zmin = track->GetZ() - dz;
1893 zmax = track->GetZ() + dz;
1894 ymin = track->GetY() + r*det.GetPhi() - dy;
1895 ymax = track->GetY() + r*det.GetPhi() + dy;
1896
1897 // bring track back to idead detector plane
1898 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
1899
1900 return kTRUE;
1901}
1902//------------------------------------------------------------------------
1903void AliITStrackerMI::AliITSlayer::
1904SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1905 //--------------------------------------------------------------------
1906 // This function sets the "window"
1907 //--------------------------------------------------------------------
1908
1909 Double_t circle=2*TMath::Pi()*fR;
1910 fYmin = ymin;
1911 fYmax = ymax;
1912 fZmin = zmin;
1913 fZmax = zmax;
1914 // AD
1915 // enlarge road in y by maximum cluster error on this layer (3 sigma)
1916 fYmin -= fNMaxSigmaCl*fMaxSigmaClY;
1917 fYmax += fNMaxSigmaCl*fMaxSigmaClY;
1918 fZmin -= fNMaxSigmaCl*fMaxSigmaClZ;
1919 fZmax += fNMaxSigmaCl*fMaxSigmaClZ;
1920
1921 Float_t ymiddle = (fYmin+fYmax)*0.5;
1922 if (ymiddle<fYB[0]) {
1923 fYmin+=circle; fYmax+=circle; ymiddle+=circle;
1924 } else if (ymiddle>fYB[1]) {
1925 fYmin-=circle; fYmax-=circle; ymiddle-=circle;
1926 }
1927
1928 //
1929 fCurrentSlice =-1;
1930 // defualt take all
1931 fClustersCs = fClusters;
1932 fClusterIndexCs = fClusterIndex;
1933 fYcs = fY;
1934 fZcs = fZ;
1935 fNcs = fN;
1936 //
1937 //is in 20 slice?
1938 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1939 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1940 if (slice<0) slice=0;
1941 if (slice>20) slice=20;
1942 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1943 if (isOK) {
1944 fCurrentSlice=slice;
1945 fClustersCs = fClusters20[fCurrentSlice];
1946 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1947 fYcs = fY20[fCurrentSlice];
1948 fZcs = fZ20[fCurrentSlice];
1949 fNcs = fN20[fCurrentSlice];
1950 }
1951 }
1952 //
1953 //is in 10 slice?
1954 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1955 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1956 if (slice<0) slice=0;
1957 if (slice>10) slice=10;
1958 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1959 if (isOK) {
1960 fCurrentSlice=slice;
1961 fClustersCs = fClusters10[fCurrentSlice];
1962 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1963 fYcs = fY10[fCurrentSlice];
1964 fZcs = fZ10[fCurrentSlice];
1965 fNcs = fN10[fCurrentSlice];
1966 }
1967 }
1968 //
1969 //is in 5 slice?
1970 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1971 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1972 if (slice<0) slice=0;
1973 if (slice>5) slice=5;
1974 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1975 if (isOK) {
1976 fCurrentSlice=slice;
1977 fClustersCs = fClusters5[fCurrentSlice];
1978 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1979 fYcs = fY5[fCurrentSlice];
1980 fZcs = fZ5[fCurrentSlice];
1981 fNcs = fN5[fCurrentSlice];
1982 }
1983 }
1984 //
1985 fI = FindClusterIndex(fZmin);
1986 fImax = TMath::Min(FindClusterIndex(fZmax)+1,fNcs);
1987 fSkip = 0;
1988 fAccepted = 0;
1989
1990 return;
1991}
1992//------------------------------------------------------------------------
1993Int_t AliITStrackerMI::AliITSlayer::
1994FindDetectorIndex(Double_t phi, Double_t z) const {
1995 //--------------------------------------------------------------------
1996 //This function finds the detector crossed by the track
1997 //--------------------------------------------------------------------
1998 Double_t dphi;
1999 if (fZOffset<0) // old geometry
2000 dphi = -(phi-fPhiOffset);
2001 else // new geometry
2002 dphi = phi-fPhiOffset;
2003
2004
2005 if (dphi < 0) dphi += 2*TMath::Pi();
2006 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
2007 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
2008 if (np>=fNladders) np-=fNladders;
2009 if (np<0) np+=fNladders;
2010
2011
2012 Double_t dz=fZOffset-z;
2013 Double_t nnz = dz*(fNdetectors-1)*0.5/fZOffset+0.5;
2014 Int_t nz = (nnz<0 ? -1 : (Int_t)nnz);
2015 if (nz>=fNdetectors || nz<0) {
2016 //printf("ndet %d phi %f z %f np %d nz %d\n",fNdetectors,phi,z,np,nz);
2017 return -1;
2018 }
2019
2020 // ad hoc correction for 3rd ladder of SDD inner layer,
2021 // which is reversed (rotated by pi around local y)
2022 // this correction is OK only from AliITSv11Hybrid onwards
2023 if (GetR()>12. && GetR()<20.) { // SDD inner
2024 if(np==2) { // 3rd ladder
2025 Double_t posMod252[3];
2026 AliITSgeomTGeo::GetTranslation(252,posMod252);
2027 // check the Z coordinate of Mod 252: if negative
2028 // (old SDD geometry in AliITSv11Hybrid)
2029 // the swap of numeration whould be applied
2030 if(posMod252[2]<0.){
2031 nz = (fNdetectors-1) - nz;
2032 }
2033 }
2034 }
2035 //printf("ndet %d phi %f z %f np %d nz %d\n",fNdetectors,phi,z,np,nz);
2036
2037
2038 return np*fNdetectors + nz;
2039}
2040//------------------------------------------------------------------------
2041const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci,Bool_t test)
2042{
2043 //--------------------------------------------------------------------
2044 // This function returns clusters within the "window"
2045 //--------------------------------------------------------------------
2046
2047 if (fCurrentSlice<0) {
2048 Double_t rpi2 = 2.*fR*TMath::Pi();
2049 for (Int_t i=fI; i<fImax; i++) {
2050 Double_t y = fY[i];
2051 Double_t z = fZ[i];
2052 if (fYmax<y) y -= rpi2;
2053 if (fYmin>y) y += rpi2;
2054 if (y<fYmin) continue;
2055 if (y>fYmax) continue;
2056 // AD
2057 // skip clusters that are in "extended" road but they
2058 // 3sigma error does not touch the original road
2059 if (z+fNMaxSigmaCl*TMath::Sqrt(fClusters[i]->GetSigmaZ2())<fZmin+fNMaxSigmaCl*fMaxSigmaClZ) continue;
2060 if (z-fNMaxSigmaCl*TMath::Sqrt(fClusters[i]->GetSigmaZ2())>fZmax-fNMaxSigmaCl*fMaxSigmaClZ) continue;
2061 //
2062 if (TMath::Abs(fClusters[i]->GetQ())<1.e-13 && fSkip==2) continue;
2063 ci=i;
2064 if (!test) fI=i+1;
2065 return fClusters[i];
2066 }
2067 } else {
2068 for (Int_t i=fI; i<fImax; i++) {
2069 if (fYcs[i]<fYmin) continue;
2070 if (fYcs[i]>fYmax) continue;
2071 if (TMath::Abs(fClustersCs[i]->GetQ())<1.e-13 && fSkip==2) continue;
2072 ci=fClusterIndexCs[i];
2073 if (!test) fI=i+1;
2074 return fClustersCs[i];
2075 }
2076 }
2077 return 0;
2078}
2079//------------------------------------------------------------------------
2080Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
2081const {
2082 //--------------------------------------------------------------------
2083 // This function returns the layer thickness at this point (units X0)
2084 //--------------------------------------------------------------------
2085 Double_t d=0.0085;
2086 x0=AliITSRecoParam::GetX0Air();
2087 if (43<fR&&fR<45) { //SSD2
2088 Double_t dd=0.0034;
2089 d=dd;
2090 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2091 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
2092 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
2093 for (Int_t i=0; i<12; i++) {
2094 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
2095 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2096 d+=0.0034;
2097 break;
2098 }
2099 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
2100 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2101 d+=0.0034;
2102 break;
2103 }
2104 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2105 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2106 }
2107 } else
2108 if (37<fR&&fR<41) { //SSD1
2109 Double_t dd=0.0034;
2110 d=dd;
2111 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2112 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
2113 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
2114 for (Int_t i=0; i<11; i++) {
2115 if (TMath::Abs(z-3.9*i)<0.15) {
2116 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2117 d+=dd;
2118 break;
2119 }
2120 if (TMath::Abs(z+3.9*i)<0.15) {
2121 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2122 d+=dd;
2123 break;
2124 }
2125 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2126 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2127 }
2128 } else
2129 if (13<fR&&fR<26) { //SDD
2130 Double_t dd=0.0033;
2131 d=dd;
2132 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2133
2134 if (TMath::Abs(y-1.80)<0.55) {
2135 d+=0.016;
2136 for (Int_t j=0; j<20; j++) {
2137 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2138 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2139 }
2140 }
2141 if (TMath::Abs(y+1.80)<0.55) {
2142 d+=0.016;
2143 for (Int_t j=0; j<20; j++) {
2144 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2145 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2146 }
2147 }
2148
2149 for (Int_t i=0; i<4; i++) {
2150 if (TMath::Abs(z-7.3*i)<0.60) {
2151 d+=dd;
2152 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2153 break;
2154 }
2155 if (TMath::Abs(z+7.3*i)<0.60) {
2156 d+=dd;
2157 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2158 break;
2159 }
2160 }
2161 } else
2162 if (6<fR&&fR<8) { //SPD2
2163 Double_t dd=0.0063; x0=21.5;
2164 d=dd;
2165 if (TMath::Abs(y-3.08)>0.5) d+=dd;
2166 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
2167 } else
2168 if (3<fR&&fR<5) { //SPD1
2169 Double_t dd=0.0063; x0=21.5;
2170 d=dd;
2171 if (TMath::Abs(y+0.21)>0.6) d+=dd;
2172 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
2173 }
2174
2175 return d;
2176}
2177//------------------------------------------------------------------------
2178AliITStrackerMI::AliITSdetector::AliITSdetector(const AliITSdetector& det):
2179fR(det.fR),
2180fRmisal(det.fRmisal),
2181fPhi(det.fPhi),
2182fSinPhi(det.fSinPhi),
2183fCosPhi(det.fCosPhi),
2184fYmin(det.fYmin),
2185fYmax(det.fYmax),
2186fZmin(det.fZmin),
2187fZmax(det.fZmax),
2188fIsBad(det.fIsBad),
2189fNChips(det.fNChips),
2190fChipIsBad(det.fChipIsBad)
2191{
2192 //Copy constructor
2193}
2194//------------------------------------------------------------------------
2195void AliITStrackerMI::AliITSdetector::ReadBadDetectorAndChips(Int_t ilayer,Int_t idet,
2196 const AliITSDetTypeRec *detTypeRec)
2197{
2198 //--------------------------------------------------------------------
2199 // Read bad detectors and chips from calibration objects in AliITSDetTypeRec
2200 //--------------------------------------------------------------------
2201
2202 // In AliITSDetTypeRec, detector numbers go from 0 to 2197
2203 // while in the tracker they start from 0 for each layer
2204 for(Int_t il=0; il<ilayer; il++)
2205 idet += AliITSgeomTGeo::GetNLadders(il+1)*AliITSgeomTGeo::GetNDetectors(il+1);
2206
2207 Int_t detType;
2208 if (ilayer==0 || ilayer==1) { // ---------- SPD
2209 detType = 0;
2210 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
2211 detType = 1;
2212 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
2213 detType = 2;
2214 } else {
2215 printf("AliITStrackerMI::AliITSdetector::InitBadFromOCDB: Wrong layer number %d\n",ilayer);
2216 return;
2217 }
2218
2219 // Get calibration from AliITSDetTypeRec
2220 AliITSCalibration *calib = (AliITSCalibration*)detTypeRec->GetCalibrationModel(idet);
2221 calib->SetModuleIndex(idet);
2222 AliITSCalibration *calibSPDdead = 0;
2223 if(detType==0) calibSPDdead = (AliITSCalibration*)detTypeRec->GetSPDDeadModel(idet); // TEMPORARY
2224 if (calib->IsBad() ||
2225 (detType==0 && calibSPDdead->IsBad())) // TEMPORARY
2226 {
2227 SetBad();
2228 // printf("lay %d bad %d\n",ilayer,idet);
2229 }
2230
2231 // Get segmentation from AliITSDetTypeRec
2232 AliITSsegmentation *segm = (AliITSsegmentation*)detTypeRec->GetSegmentationModel(detType);
2233
2234 // Read info about bad chips
2235 fNChips = segm->GetMaximumChipIndex()+1;
2236 //printf("ilayer %d detType %d idet %d fNChips %d %d GetNumberOfChips %d\n",ilayer,detType,idet,fNChips,segm->GetMaximumChipIndex(),segm->GetNumberOfChips());
2237 if(fChipIsBad) { delete [] fChipIsBad; fChipIsBad=NULL; }
2238 fChipIsBad = new Bool_t[fNChips];
2239 for (Int_t iCh=0;iCh<fNChips;iCh++) {
2240 fChipIsBad[iCh] = calib->IsChipBad(iCh);
2241 if (detType==0 && calibSPDdead->IsChipBad(iCh)) fChipIsBad[iCh] = kTRUE; // TEMPORARY
2242 //if(fChipIsBad[iCh]) {printf("lay %d det %d bad chip %d\n",ilayer,idet,iCh);}
2243 }
2244
2245 return;
2246}
2247//------------------------------------------------------------------------
2248Double_t AliITStrackerMI::GetEffectiveThickness()
2249{
2250 //--------------------------------------------------------------------
2251 // Returns the thickness between the current layer and the vertex (units X0)
2252 //--------------------------------------------------------------------
2253
2254 if(fUseTGeo!=0) {
2255 if(fxOverX0Layer[0]<0) BuildMaterialLUT("Layers");
2256 if(fxOverX0Shield[0]<0) BuildMaterialLUT("Shields");
2257 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
2258 }
2259
2260 // beam pipe
2261 Double_t dPipe = (fUseTGeo==0 ? AliITSRecoParam::GetdPipe() : fxOverX0Pipe);
2262 Double_t d=dPipe*AliITSRecoParam::GetrPipe()*AliITSRecoParam::GetrPipe();
2263
2264 // layers
2265 Double_t x0=0;
2266 Double_t xn=fgLayers[fI].GetR();
2267 for (Int_t i=0; i<fI; i++) {
2268 Double_t xi=fgLayers[i].GetR();
2269 Double_t dLayer = (fUseTGeo==0 ? fgLayers[i].GetThickness(0,0,x0) : fxOverX0Layer[i]);
2270 d+=dLayer*xi*xi;
2271 }
2272
2273 // shields
2274 if (fI>1) {
2275 Double_t dshieldSPD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(0) : fxOverX0Shield[0]);
2276 d+=dshieldSPD*AliITSRecoParam::GetrInsideShield(0)*AliITSRecoParam::GetrInsideShield(0);
2277 }
2278 if (fI>3) {
2279 Double_t dshieldSDD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(1) : fxOverX0Shield[1]);
2280 d+=dshieldSDD*AliITSRecoParam::GetrInsideShield(1)*AliITSRecoParam::GetrInsideShield(1);
2281 }
2282 return d/(xn*xn);
2283}
2284//------------------------------------------------------------------------
2285Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
2286 //-------------------------------------------------------------------
2287 // This function returns number of clusters within the "window"
2288 //--------------------------------------------------------------------
2289 Int_t ncl=0;
2290 for (Int_t i=fI; i<fN; i++) {
2291 const AliITSRecPoint *c=fClusters[i];
2292 if (c->GetZ() > fZmax) break;
2293 if (c->IsUsed()) continue;
2294 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
2295 Double_t y=fR*det.GetPhi() + c->GetY();
2296
2297 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
2298 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
2299
2300 if (y<fYmin) continue;
2301 if (y>fYmax) continue;
2302 ncl++;
2303 }
2304 return ncl;
2305}
2306//------------------------------------------------------------------------
2307Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2308 const AliITStrackMI *clusters,Bool_t extra, Bool_t planeeff)
2309{
2310 //--------------------------------------------------------------------
2311 // This function refits the track "track" at the position "x" using
2312 // the clusters from "clusters"
2313 // If "extra"==kTRUE,
2314 // the clusters from overlapped modules get attached to "track"
2315 // If "planeff"==kTRUE,
2316 // special approach for plane efficiency evaluation is applyed
2317 //--------------------------------------------------------------------
2318
2319 Int_t index[AliITSgeomTGeo::kNLayers];
2320 Int_t k;
2321 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2322 Int_t nc=clusters->GetNumberOfClusters();
2323 for (k=0; k<nc; k++) {
2324 Int_t idx=clusters->GetClusterIndex(k);
2325 Int_t ilayer=(idx&0xf0000000)>>28;
2326 index[ilayer]=idx;
2327 }
2328
2329 return RefitAt(xx,track,index,extra,planeeff); // call the method below
2330}
2331//------------------------------------------------------------------------
2332Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2333 const Int_t *clusters,Bool_t extra, Bool_t planeeff)
2334{
2335 //--------------------------------------------------------------------
2336 // This function refits the track "track" at the position "x" using
2337 // the clusters from array
2338 // If "extra"==kTRUE,
2339 // the clusters from overlapped modules get attached to "track"
2340 // If "planeff"==kTRUE,
2341 // special approach for plane efficiency evaluation is applyed
2342 //--------------------------------------------------------------------
2343 Int_t index[AliITSgeomTGeo::kNLayers];
2344 Int_t k;
2345 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2346 //
2347 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
2348 index[k]=clusters[k];
2349 }
2350
2351 // special for cosmics and TPC prolonged tracks:
2352 // propagate to the innermost of:
2353 // - innermost layer crossed by the track
2354 // - innermost layer where a cluster was associated to the track
2355 static AliITSRecoParam *repa = NULL;
2356 if(!repa){
2357 repa = (AliITSRecoParam*) AliITSReconstructor::GetRecoParam();
2358 if(!repa){
2359 repa = AliITSRecoParam::GetHighFluxParam();
2360 AliWarning("Using default AliITSRecoParam class");
2361 }
2362 }
2363 Int_t evsp=repa->GetEventSpecie();
2364 ULong_t trStatus=0;
2365 if(track->GetESDtrack()) trStatus=track->GetStatus();
2366 Int_t innermostlayer=0;
2367 if((evsp&AliRecoParam::kCosmic) || (trStatus&AliESDtrack::kTPCin)) {
2368 innermostlayer=5;
2369 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
2370 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
2371 if( (drphi < (fgLayers[innermostlayer].GetR()+1.)) ||
2372 index[innermostlayer] >= 0 ) break;
2373 }
2374
2375 AliDebug(2,Form(" drphi %f innermost %d",drphi,innermostlayer));
2376 }
2377
2378 Int_t modstatus=1; // found
2379 Float_t xloc,zloc;
2380 Int_t from, to, step;
2381 if (xx > track->GetX()) {
2382 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
2383 step=+1;
2384 } else {
2385 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
2386 step=-1;
2387 }
2388 TString dir = (step>0 ? "outward" : "inward");
2389
2390 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
2391 AliITSlayer &layer=fgLayers[ilayer];
2392 Double_t r=layer.GetR();
2393
2394 if (step<0 && xx>r) break;
2395
2396 // material between SSD and SDD, SDD and SPD
2397 Double_t hI=ilayer-0.5*step;
2398 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
2399 if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
2400 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
2401 if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
2402
2403
2404 Double_t oldGlobXYZ[3];
2405 if (!track->GetXYZ(oldGlobXYZ)) return kFALSE;
2406
2407 // continue if we are already beyond this layer
2408 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
2409 if(step>0 && oldGlobR > r) continue; // going outward
2410 if(step<0 && oldGlobR < r) continue; // going inward
2411
2412 Double_t phi,z;
2413 if (!track->GetPhiZat(r,phi,z)) return kFALSE;
2414
2415 Int_t idet=layer.FindDetectorIndex(phi,z);
2416
2417 // check if we allow a prolongation without point for large-eta tracks
2418 Int_t skip = CheckSkipLayer(track,ilayer,idet);
2419 if (skip==2) {
2420 modstatus = 4; // out in z
2421 if(LocalModuleCoord(ilayer,idet,track,xloc,zloc)) { // local module coords
2422 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2423 }
2424 // cross layer
2425 // apply correction for material of the current layer
2426 // add time if going outward
2427 CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir);
2428 continue;
2429 }
2430
2431 if (idet<0) return kFALSE;
2432
2433
2434 const AliITSdetector &det=layer.GetDetector(idet);
2435 // only for ITS-SA tracks refit
2436 if (ilayer>1 && fTrackingPhase.Contains("RefitInward") && !(track->GetStatus()&AliESDtrack::kTPCin)) track->SetCheckInvariant(kFALSE);
2437 //
2438 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
2439
2440 track->SetDetectorIndex(idet);
2441 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2442
2443 Double_t dz,zmin,zmax,dy,ymin,ymax;
2444
2445 const AliITSRecPoint *clAcc=0;
2446 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2447
2448 Int_t idx=index[ilayer];
2449 if (idx>=0) { // cluster in this layer
2450 modstatus = 6; // no refit
2451 const AliITSRecPoint *cl=(AliITSRecPoint *)GetCluster(idx);
2452 if (cl) {
2453 if (idet != cl->GetDetectorIndex()) {
2454 idet=cl->GetDetectorIndex();
2455 const AliITSdetector &detc=layer.GetDetector(idet);
2456 if (!track->Propagate(detc.GetPhi(),detc.GetR())) return kFALSE;
2457 track->SetDetectorIndex(idet);
2458 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2459 }
2460 Int_t cllayer = (idx & 0xf0000000) >> 28;;
2461 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
2462 if (chi2<maxchi2) {
2463 clAcc=cl;
2464 maxchi2=chi2;
2465 modstatus = 1; // found
2466 } else {
2467 return kFALSE; //
2468 }
2469 }
2470 } else { // no cluster in this layer
2471 if (skip==1) {
2472 modstatus = 3; // skipped
2473 // Plane Eff determination:
2474 if (planeeff && ilayer==AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()) {
2475 if (IsOKForPlaneEff(track,clusters,ilayer)) // only adequate track for plane eff. evaluation
2476 UseTrackForPlaneEff(track,ilayer);
2477 }
2478 } else {
2479 modstatus = 5; // no cls in road
2480 // check dead
2481 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2482 dz = 0.5*(zmax-zmin);
2483 dy = 0.5*(ymax-ymin);
2484 Int_t dead = CheckDeadZone(track,ilayer,idet,dz,dy,kTRUE);
2485 if (dead==1) modstatus = 7; // holes in z in SPD
2486 if (dead==2 || dead==3 || dead==4) modstatus = 2; // dead from OCDB
2487 }
2488 }
2489
2490 if (clAcc) {
2491 if (!UpdateMI(track,clAcc,maxchi2,idx)) return kFALSE;
2492 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
2493 }
2494 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2495
2496
2497 if (extra && clAcc) { // search for extra clusters in overlapped modules
2498 AliITStrackV2 tmp(*track);
2499 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2500 layer.SelectClusters(zmin,zmax,ymin,ymax);
2501
2502 const AliITSRecPoint *clExtra=0; Int_t ci=-1,cci=-1;
2503 Int_t idetExtra=-1;
2504 maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2505 Double_t tolerance=0.1;
2506 while ((clExtra=layer.GetNextCluster(ci))!=0) {
2507 // only clusters in another module! (overlaps)
2508 idetExtra = clExtra->GetDetectorIndex();
2509 if (idet == idetExtra) continue;
2510
2511 const AliITSdetector &detx=layer.GetDetector(idetExtra);
2512
2513 if (!tmp.Propagate(detx.GetPhi(),detx.GetR()+clExtra->GetX())) continue;
2514 if (TMath::Abs(tmp.GetZ() - clExtra->GetZ()) > tolerance) continue;
2515 if (TMath::Abs(tmp.GetY() - clExtra->GetY()) > tolerance) continue;
2516 if (!tmp.Propagate(detx.GetPhi(),detx.GetR())) continue;
2517
2518 Double_t chi2=tmp.GetPredictedChi2(clExtra);
2519 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
2520 }
2521 if (cci>=0) {
2522 track->SetExtraCluster(ilayer,(ilayer<<28)+cci);
2523 track->SetExtraModule(ilayer,idetExtra);
2524 }
2525 } // end search for extra clusters in overlapped modules
2526
2527 // Correct for material of the current layer
2528 // cross material
2529 // add time if going outward
2530 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)) return kFALSE;
2531 track->SetCheckInvariant(kTRUE);
2532 } // end loop on layers
2533
2534 if (!track->PropagateTo(xx,0.,0.)) return kFALSE;
2535
2536 return kTRUE;
2537}
2538//------------------------------------------------------------------------
2539Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
2540{
2541 //
2542 // calculate normalized chi2
2543 // return NormalizedChi2(track,0);
2544 Float_t chi2 = 0;
2545 Float_t sum=0;
2546 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2547 // track->fdEdxMismatch=0;
2548 Float_t dedxmismatch =0;
2549 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2550 if (mode<100){
2551 for (Int_t i = 0;i<6;i++){
2552 if (track->GetClIndex(i)>=0){
2553 Float_t cerry, cerrz;
2554 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2555 else
2556 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2557 cerry*=cerry;
2558 cerrz*=cerrz;
2559 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
2560 if (i>1 && AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(i)) {
2561 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
2562 if (ratio<0.5) {
2563 cchi2+=(0.5-ratio)*10.;
2564 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2565 dedxmismatch+=(0.5-ratio)*10.;
2566 }
2567 }
2568 if (i<2 ||i>3){
2569 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
2570 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2571 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2572 if (i<2) chi2+=2*cl->GetDeltaProbability();
2573 }
2574 chi2+=cchi2;
2575 sum++;
2576 }
2577 }
2578 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2579 track->SetdEdxMismatch(dedxmismatch);
2580 }
2581 }
2582 else{
2583 for (Int_t i = 0;i<4;i++){
2584 if (track->GetClIndex(i)>=0){
2585 Float_t cerry, cerrz;
2586 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2587 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2588 cerry*=cerry;
2589 cerrz*=cerrz;
2590 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2591 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
2592 sum++;
2593 }
2594 }
2595 for (Int_t i = 4;i<6;i++){
2596 if (track->GetClIndex(i)>=0){
2597 Float_t cerry, cerrz;
2598 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2599 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2600 cerry*=cerry;
2601 cerrz*=cerrz;
2602 Float_t cerryb, cerrzb;
2603 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
2604 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
2605 cerryb*=cerryb;
2606 cerrzb*=cerrzb;
2607 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2608 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
2609 sum++;
2610 }
2611 }
2612 }
2613 if (track->GetESDtrack()->GetTPCsignal()>85){
2614 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
2615 if (ratio<0.5) {
2616 chi2+=(0.5-ratio)*5.;
2617 }
2618 if (ratio>2){
2619 chi2+=(ratio-2.0)*3;
2620 }
2621 }
2622 //
2623 Double_t match = TMath::Sqrt(track->GetChi22());
2624 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2625 if (!track->GetConstrain()) {
2626 if (track->GetNumberOfClusters()>2) {
2627 match/=track->GetNumberOfClusters()-2.;
2628 } else {
2629 match=0;
2630 }
2631 }
2632 if (match<0) match=0;
2633
2634 // penalty factor for missing points (NDeadZone>0), but no penalty
2635 // for layer with deadZoneProb close to 1 (either we wanted to skip layer
2636 // or there is a dead from OCDB)
2637 Float_t deadzonefactor = 0.;
2638 if (track->GetNDeadZone()>0.) {
2639 Int_t sumDeadZoneProbability=0;
2640 for(Int_t ilay=0;ilay<6;ilay++) {
2641 if(track->GetDeadZoneProbability(ilay)>0.) sumDeadZoneProbability++;
2642 }
2643 Int_t nDeadZoneWithProbNot1=(Int_t)(track->GetNDeadZone())-sumDeadZoneProbability;
2644 if(nDeadZoneWithProbNot1>0) {
2645 Float_t deadZoneProbability = track->GetNDeadZone()-(Float_t)sumDeadZoneProbability;
2646 AliDebug(2,Form("nDeadZone %f sumDZProbability %d nDZWithProbNot1 %d deadZoneProb %f\n",track->GetNDeadZone(),sumDeadZoneProbability,nDeadZoneWithProbNot1,deadZoneProbability));
2647 deadZoneProbability /= (Float_t)nDeadZoneWithProbNot1;
2648 Float_t one = 1.;
2649 deadZoneProbability = TMath::Min(deadZoneProbability,one);
2650 deadzonefactor = 3.*(1.1-deadZoneProbability);
2651 }
2652 }
2653
2654 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2655 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2656 1./(1.+track->GetNSkipped()));
2657 AliDebug(2,Form("match %f deadzonefactor %f chi2 %f sum %f skipped %f\n",match,deadzonefactor,chi2,sum,track->GetNSkipped()));
2658 AliDebug(2,Form("NormChi2 %f cls %d\n",normchi2,track->GetNumberOfClusters()));
2659 return normchi2;
2660}
2661//------------------------------------------------------------------------
2662Double_t AliITStrackerMI::GetMatchingChi2(const AliITStrackMI * track1,const AliITStrackMI * track2)
2663{
2664 //
2665 // return matching chi2 between two tracks
2666 Double_t largeChi2=1000.;
2667
2668 AliITStrackMI track3(*track2);
2669 if (!track3.Propagate(track1->GetAlpha(),track1->GetX())) return largeChi2;
2670 TMatrixD vec(5,1);
2671 vec(0,0)=track1->GetY() - track3.GetY();
2672 vec(1,0)=track1->GetZ() - track3.GetZ();
2673 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2674 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2675 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
2676 //
2677 TMatrixD cov(5,5);
2678 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2679 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2680 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2681 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2682 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2683
2684 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2685 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2686 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2687 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2688 //
2689 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2690 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2691 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2692 //
2693 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2694 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2695 //
2696 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2697
2698 cov.Invert();
2699 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2700 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2701 return chi2(0,0);
2702}
2703//------------------------------------------------------------------------
2704Double_t AliITStrackerMI::GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr) const
2705{
2706 //
2707 // return probability that given point (characterized by z position and error)
2708 // is in SPD dead zone
2709 // This method assumes that fSPDdetzcentre is ordered from -z to +z
2710 //
2711 Double_t probability = 0.;
2712 Double_t nearestz = 0.,distz=0.;
2713 Int_t nearestzone = -1;
2714 Double_t mindistz = 1000.;
2715
2716 // find closest dead zone
2717 for (Int_t i=0; i<3; i++) {
2718 distz=TMath::Abs(zpos-0.5*(fSPDdetzcentre[i]+fSPDdetzcentre[i+1]));
2719 if (distz<mindistz) {
2720 nearestzone=i;
2721 nearestz=0.5*(fSPDdetzcentre[i]+fSPDdetzcentre[i+1]);
2722 mindistz=distz;
2723 }
2724 }
2725
2726 // too far from dead zone
2727 if (TMath::Abs(zpos-nearestz)>0.25+3.*zerr) return probability;
2728
2729
2730 Double_t zmin, zmax;
2731 if (nearestzone==0) { // dead zone at z = -7
2732 zmin = fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2733 zmax = fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2734 } else if (nearestzone==1) { // dead zone at z = 0
2735 zmin = fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2736 zmax = fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2737 } else if (nearestzone==2) { // dead zone at z = +7
2738 zmin = fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2739 zmax = fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2740 } else {
2741 zmin = 0.;
2742 zmax = 0.;
2743 }
2744 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2745 // dead zone)
2746 probability = 0.5*( AliMathBase::ErfFast((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2747 AliMathBase::ErfFast((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
2748 AliDebug(2,Form("zpos %f +- %f nearestzone %d zmin zmax %f %f prob %f\n",zpos,zerr,nearestzone,zmin,zmax,probability));
2749 return probability;
2750}
2751//------------------------------------------------------------------------
2752Double_t AliITStrackerMI::GetTruncatedChi2(const AliITStrackMI * track, Float_t fac)
2753{
2754 //
2755 // calculate normalized chi2
2756 Float_t chi2[6];
2757 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2758 Float_t ncl = 0;
2759 for (Int_t i = 0;i<6;i++){
2760 if (TMath::Abs(track->GetDy(i))>0){
2761 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2762 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2763 ncl++;
2764 }
2765 else{chi2[i]=10000;}
2766 }
2767 Int_t index[6];
2768 TMath::Sort(6,chi2,index,kFALSE);
2769 Float_t max = float(ncl)*fac-1.;
2770 Float_t sumchi=0, sumweight=0;
2771 for (Int_t i=0;i<max+1;i++){
2772 Float_t weight = (i<max)?1.:(max+1.-i);
2773 sumchi+=weight*chi2[index[i]];
2774 sumweight+=weight;
2775 }
2776 Double_t normchi2 = sumchi/sumweight;
2777 return normchi2;
2778}
2779//------------------------------------------------------------------------
2780Double_t AliITStrackerMI::GetInterpolatedChi2(const AliITStrackMI * forwardtrack,const AliITStrackMI * backtrack)
2781{
2782 //
2783 // calculate normalized chi2
2784 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2785 Int_t npoints = 0;
2786 Double_t res =0;
2787 for (Int_t i=0;i<6;i++){
2788 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2789 Double_t sy1 = forwardtrack->GetSigmaY(i);
2790 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2791 Double_t sy2 = backtrack->GetSigmaY(i);
2792 Double_t sz2 = backtrack->GetSigmaZ(i);
2793 if (i<2){ sy2=1000.;sz2=1000;}
2794 //
2795 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2796 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2797 //
2798 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2799 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2800 //
2801 res+= nz0*nz0+ny0*ny0;
2802 npoints++;
2803 }
2804 if (npoints>1) return
2805 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
2806 //2*forwardtrack->fNUsed+
2807 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2808 1./(1.+forwardtrack->GetNSkipped()));
2809 return 1000;
2810}
2811//------------------------------------------------------------------------
2812Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2813 //--------------------------------------------------------------------
2814 // Return pointer to a given cluster
2815 //--------------------------------------------------------------------
2816 Int_t l=(index & 0xf0000000) >> 28;
2817 Int_t c=(index & 0x0fffffff) >> 00;
2818 return fgLayers[l].GetWeight(c);
2819}
2820//------------------------------------------------------------------------
2821void AliITStrackerMI::RegisterClusterTracks(const AliITStrackMI* track,Int_t id)
2822{
2823 //---------------------------------------------
2824 // register track to the list
2825 //
2826 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2827 //
2828 //
2829 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2830 Int_t index = track->GetClusterIndex(icluster);
2831 Int_t l=(index & 0xf0000000) >> 28;
2832 Int_t c=(index & 0x0fffffff) >> 00;
2833 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2834 for (Int_t itrack=0;itrack<4;itrack++){
2835 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2836 fgLayers[l].SetClusterTracks(itrack,c,id);
2837 break;
2838 }
2839 }
2840 }
2841}
2842//------------------------------------------------------------------------
2843void AliITStrackerMI::UnRegisterClusterTracks(const AliITStrackMI* track, Int_t id)
2844{
2845 //---------------------------------------------
2846 // unregister track from the list
2847 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2848 Int_t index = track->GetClusterIndex(icluster);
2849 Int_t l=(index & 0xf0000000) >> 28;
2850 Int_t c=(index & 0x0fffffff) >> 00;
2851 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2852 for (Int_t itrack=0;itrack<4;itrack++){
2853 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2854 fgLayers[l].SetClusterTracks(itrack,c,-1);
2855 }
2856 }
2857 }
2858}
2859//------------------------------------------------------------------------
2860Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2861{
2862 //-------------------------------------------------------------
2863 //get number of shared clusters
2864 //-------------------------------------------------------------
2865 Float_t shared=0;
2866 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2867 // mean number of clusters
2868 Float_t *ny = GetNy(id), *nz = GetNz(id);
2869
2870
2871 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2872 Int_t index = track->GetClusterIndex(icluster);
2873 Int_t l=(index & 0xf0000000) >> 28;
2874 Int_t c=(index & 0x0fffffff) >> 00;
2875 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2876 // if (ny[l]<1.e-13){
2877 // printf("problem\n");
2878 // }
2879 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2880 Float_t weight=1;
2881 //
2882 Float_t deltan = 0;
2883 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2884 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2885 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2886 if (l<2 || l>3){
2887 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2888 }
2889 else{
2890 deltan = (cl->GetNz()-nz[l]);
2891 }
2892 if (deltan>2.0) continue; // extended - highly probable shared cluster
2893 weight = 2./TMath::Max(3.+deltan,2.);
2894 //
2895 for (Int_t itrack=0;itrack<4;itrack++){
2896 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2897 list[l]=index;
2898 clist[l] = (AliITSRecPoint*)GetCluster(index);
2899 track->SetSharedWeight(l,weight);
2900 shared+=weight;
2901 break;
2902 }
2903 }
2904 }
2905 track->SetNUsed(shared);
2906 return shared;
2907}
2908//------------------------------------------------------------------------
2909Int_t AliITStrackerMI::GetOverlapTrack(const AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2910{
2911 //
2912 // find first shared track
2913 //
2914 // mean number of clusters
2915 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2916 //
2917 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2918 Int_t sharedtrack=100000;
2919 Int_t tracks[24],trackindex=0;
2920 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2921 //
2922 for (Int_t icluster=0;icluster<6;icluster++){
2923 if (clusterlist[icluster]<0) continue;
2924 Int_t index = clusterlist[icluster];
2925 Int_t l=(index & 0xf0000000) >> 28;
2926 Int_t c=(index & 0x0fffffff) >> 00;
2927 // if (ny[l]<1.e-13){
2928 // printf("problem\n");
2929 // }
2930 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2931 //if (l>3) continue;
2932 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2933 //
2934 Float_t deltan = 0;
2935 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2936 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2937 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2938 if (l<2 || l>3){
2939 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2940 }
2941 else{
2942 deltan = (cl->GetNz()-nz[l]);
2943 }
2944 if (deltan>2.0) continue; // extended - highly probable shared cluster
2945 //
2946 for (Int_t itrack=3;itrack>=0;itrack--){
2947 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2948 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2949 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2950 trackindex++;
2951 }
2952 }
2953 }
2954 if (trackindex==0) return -1;
2955 if (trackindex==1){
2956 sharedtrack = tracks[0];
2957 }else{
2958 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2959 else{
2960 //
2961 Int_t tracks2[24], cluster[24];
2962 for (Int_t i=0;i<trackindex;i++){ tracks2[i]=-1; cluster[i]=0;}
2963 Int_t index =0;
2964 //
2965 for (Int_t i=0;i<trackindex;i++){
2966 if (tracks[i]<0) continue;
2967 tracks2[index] = tracks[i];
2968 cluster[index]++;
2969 for (Int_t j=i+1;j<trackindex;j++){
2970 if (tracks[j]<0) continue;
2971 if (tracks[j]==tracks[i]){
2972 cluster[index]++;
2973 tracks[j]=-1;
2974 }
2975 }
2976 index++;
2977 }
2978 Int_t max=0;
2979 for (Int_t i=0;i<index;i++){
2980 if (cluster[index]>max) {
2981 sharedtrack=tracks2[index];
2982 max=cluster[index];
2983 }
2984 }
2985 }
2986 }
2987
2988 if (sharedtrack>=100000) return -1;
2989 //
2990 // make list of overlaps
2991 shared =0;
2992 for (Int_t icluster=0;icluster<6;icluster++){
2993 if (clusterlist[icluster]<0) continue;
2994 Int_t index = clusterlist[icluster];
2995 Int_t l=(index & 0xf0000000) >> 28;
2996 Int_t c=(index & 0x0fffffff) >> 00;
2997 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2998 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2999 if (l==0 || l==1){
3000 if (cl->GetNy()>2) continue;
3001 if (cl->GetNz()>2) continue;
3002 }
3003 if (l==4 || l==5){
3004 if (cl->GetNy()>3) continue;
3005 if (cl->GetNz()>3) continue;
3006 }
3007 //
3008 for (Int_t itrack=3;itrack>=0;itrack--){
3009 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
3010 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
3011 overlist[l]=index;
3012 shared++;
3013 }
3014 }
3015 }
3016 return sharedtrack;
3017}
3018//------------------------------------------------------------------------
3019AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
3020 //
3021 // try to find track hypothesys without conflicts
3022 // with minimal chi2;
3023 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
3024 Int_t entries1 = arr1->GetEntriesFast();
3025 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
3026 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
3027 Int_t entries2 = arr2->GetEntriesFast();
3028 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
3029 //
3030 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
3031 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
3032 if (track10->Pt()>0.5+track20->Pt()) return track10;
3033
3034 for (Int_t itrack=0;itrack<entries1;itrack++){
3035 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
3036 UnRegisterClusterTracks(track,trackID1);
3037 }
3038 //
3039 for (Int_t itrack=0;itrack<entries2;itrack++){
3040 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
3041 UnRegisterClusterTracks(track,trackID2);
3042 }
3043 Int_t index1=0;
3044 Int_t index2=0;
3045 Float_t maxconflicts=6;
3046 Double_t maxchi2 =1000.;
3047 //
3048 // get weight of hypothesys - using best hypothesy
3049 Double_t w1,w2;
3050
3051 Int_t list1[6],list2[6];
3052 AliITSRecPoint *clist1[6], *clist2[6] ;
3053 RegisterClusterTracks(track10,trackID1);
3054 RegisterClusterTracks(track20,trackID2);
3055 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
3056 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
3057 UnRegisterClusterTracks(track10,trackID1);
3058 UnRegisterClusterTracks(track20,trackID2);
3059 //
3060 // normalized chi2
3061 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
3062 Float_t nerry[6],nerrz[6];
3063 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
3064 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
3065 for (Int_t i=0;i<6;i++){
3066 if ( (erry1[i]>0) && (erry2[i]>0)) {
3067 nerry[i] = TMath::Min(erry1[i],erry2[i]);
3068 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
3069 }else{
3070 nerry[i] = TMath::Max(erry1[i],erry2[i]);
3071 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
3072 }
3073 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
3074 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
3075 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
3076 ncl1++;
3077 }
3078 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
3079 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
3080 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
3081 ncl2++;
3082 }
3083 }
3084 chi21/=ncl1;
3085 chi22/=ncl2;
3086 //
3087 //
3088 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
3089 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
3090 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
3091 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
3092 //
3093 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
3094 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
3095 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
3096 );
3097 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
3098 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
3099 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
3100 );
3101
3102 Double_t sumw = w1+w2;
3103 w1/=sumw;
3104 w2/=sumw;
3105 if (w1<w2*0.5) {
3106 w1 = (d2+0.5)/(d1+d2+1.);
3107 w2 = (d1+0.5)/(d1+d2+1.);
3108 }
3109 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
3110 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
3111 //
3112 // get pair of "best" hypothesys
3113 //
3114 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
3115 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
3116
3117 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
3118 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
3119 //if (track1->fFakeRatio>0) continue;
3120 RegisterClusterTracks(track1,trackID1);
3121 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
3122 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
3123
3124 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
3125 //if (track2->fFakeRatio>0) continue;
3126 Float_t nskipped=0;
3127 RegisterClusterTracks(track2,trackID2);
3128 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
3129 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
3130 UnRegisterClusterTracks(track2,trackID2);
3131 //
3132 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
3133 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
3134 if (nskipped>0.5) continue;
3135 //
3136 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
3137 if (conflict1+1<cconflict1) continue;
3138 if (conflict2+1<cconflict2) continue;
3139 Float_t conflict=0;
3140 Float_t sumchi2=0;
3141 Float_t sum=0;
3142 for (Int_t i=0;i<6;i++){
3143 //
3144 Float_t c1 =0.; // conflict coeficients
3145 Float_t c2 =0.;
3146 if (clist1[i]&&clist2[i]){
3147 Float_t deltan = 0;
3148 if (i<2 || i>3){
3149 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
3150 }
3151 else{
3152 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
3153 }
3154 c1 = 2./TMath::Max(3.+deltan,2.);
3155 c2 = 2./TMath::Max(3.+deltan,2.);
3156 }
3157 else{
3158 if (clist1[i]){
3159 Float_t deltan = 0;
3160 if (i<2 || i>3){
3161 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
3162 }
3163 else{
3164 deltan = (clist1[i]->GetNz()-nz1[i]);
3165 }
3166 c1 = 2./TMath::Max(3.+deltan,2.);
3167 c2 = 0;
3168 }
3169
3170 if (clist2[i]){
3171 Float_t deltan = 0;
3172 if (i<2 || i>3){
3173 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
3174 }
3175 else{
3176 deltan = (clist2[i]->GetNz()-nz2[i]);
3177 }
3178 c2 = 2./TMath::Max(3.+deltan,2.);
3179 c1 = 0;
3180 }
3181 }
3182 //
3183 chi21=0;chi22=0;
3184 if (TMath::Abs(track1->GetDy(i))>0.) {
3185 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
3186 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
3187 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
3188 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
3189 }else{
3190 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
3191 }
3192 //
3193 if (TMath::Abs(track2->GetDy(i))>0.) {
3194 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
3195 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
3196 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
3197 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
3198 }
3199 else{
3200 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
3201 }
3202 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
3203 if (chi21>0) sum+=w1;
3204 if (chi22>0) sum+=w2;
3205 conflict+=(c1+c2);
3206 }
3207 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
3208 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
3209 Double_t normchi2 = 2*conflict+sumchi2/sum;
3210 if ( normchi2 <maxchi2 ){
3211 index1 = itrack1;
3212 index2 = itrack2;
3213 maxconflicts = conflict;
3214 maxchi2 = normchi2;
3215 }
3216 }
3217 UnRegisterClusterTracks(track1,trackID1);
3218 }
3219 //
3220 // if (maxconflicts<4 && maxchi2<th0){
3221 if (maxchi2<th0*2.){
3222 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
3223 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
3224 track1->SetChi2MIP(5,maxconflicts);
3225 track1->SetChi2MIP(6,maxchi2);
3226 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
3227 // track1->UpdateESDtrack(AliESDtrack::kITSin);
3228 track1->SetChi2MIP(8,index1);
3229 fBestTrackIndex[trackID1] =index1;
3230 UpdateESDtrack(track1, AliESDtrack::kITSin);
3231 }
3232 else if (track10->GetChi2MIP(0)<th1){
3233 track10->SetChi2MIP(5,maxconflicts);
3234 track10->SetChi2MIP(6,maxchi2);
3235 // track10->UpdateESDtrack(AliESDtrack::kITSin);
3236 UpdateESDtrack(track10,AliESDtrack::kITSin);
3237 }
3238
3239 for (Int_t itrack=0;itrack<entries1;itrack++){
3240 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
3241 UnRegisterClusterTracks(track,trackID1);
3242 }
3243 //
3244 for (Int_t itrack=0;itrack<entries2;itrack++){
3245 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
3246 UnRegisterClusterTracks(track,trackID2);
3247 }
3248
3249 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3250 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3251 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3252 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3253 RegisterClusterTracks(track10,trackID1);
3254 }
3255 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3256 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3257 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3258 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3259 RegisterClusterTracks(track20,trackID2);
3260 }
3261 return track10;
3262
3263}
3264//------------------------------------------------------------------------
3265void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
3266 //--------------------------------------------------------------------
3267 // This function marks clusters assigned to the track
3268 //--------------------------------------------------------------------
3269 AliTracker::UseClusters(t,from);
3270
3271 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
3272 //if (c->GetQ()>2) c->Use();
3273 if (c->GetSigmaZ2()>0.1) c->Use();
3274 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
3275 //if (c->GetQ()>2) c->Use();
3276 if (c->GetSigmaZ2()>0.1) c->Use();
3277
3278}
3279//------------------------------------------------------------------------
3280void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
3281{
3282 //------------------------------------------------------------------
3283 // add track to the list of hypothesys
3284 //------------------------------------------------------------------
3285
3286 if (esdindex>=fTrackHypothesys.GetEntriesFast())
3287 fTrackHypothesys.Expand(TMath::Max(fTrackHypothesys.GetSize(),esdindex*2+10));
3288 //
3289 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3290 if (!array) {
3291 array = new TObjArray(10);
3292 fTrackHypothesys.AddAt(array,esdindex);
3293 }
3294 array->AddLast(track);
3295}
3296//------------------------------------------------------------------------
3297void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
3298{
3299 //-------------------------------------------------------------------
3300 // compress array of track hypothesys
3301 // keep only maxsize best hypothesys
3302 //-------------------------------------------------------------------
3303 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
3304 if (! (fTrackHypothesys.At(esdindex)) ) return;
3305 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3306 Int_t entries = array->GetEntriesFast();
3307 //
3308 //- find preliminary besttrack as a reference
3309 Float_t minchi2=10000;
3310 Int_t maxn=0;
3311 AliITStrackMI * besttrack=0;
3312 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
3313 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3314 if (!track) continue;
3315 Float_t chi2 = NormalizedChi2(track,0);
3316 //
3317 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
3318 track->SetLabel(tpcLabel);
3319 CookdEdx(track);
3320 track->SetFakeRatio(1.);
3321 CookLabel(track,0.); //For comparison only
3322 //
3323 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
3324 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3325 if (track->GetNumberOfClusters()<maxn) continue;
3326 maxn = track->GetNumberOfClusters();
3327 if (chi2<minchi2){
3328 minchi2=chi2;
3329 besttrack=track;
3330 }
3331 }
3332 else{
3333 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3334 delete array->RemoveAt(itrack);
3335 }
3336 }
3337 }
3338 if (!besttrack) return;
3339 //
3340 //
3341 //take errors of best track as a reference
3342 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
3343 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3344 for (Int_t j=0;j<6;j++) {
3345 if (besttrack->GetClIndex(j)>=0){
3346 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3347 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3348 ny[j] = besttrack->GetNy(j);
3349 nz[j] = besttrack->GetNz(j);
3350 }
3351 }
3352 //
3353 // calculate normalized chi2
3354 //
3355 Float_t * chi2 = new Float_t[entries];
3356 Int_t * index = new Int_t[entries];
3357 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3358 for (Int_t itrack=0;itrack<entries;itrack++){
3359 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3360 if (track){
3361 AliDebug(2,Form("track %d ncls %d\n",itrack,track->GetNumberOfClusters()));
3362 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
3363 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3364 chi2[itrack] = track->GetChi2MIP(0);
3365 else{
3366 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3367 delete array->RemoveAt(itrack);
3368 }
3369 }
3370 }
3371 }
3372 //
3373 TMath::Sort(entries,chi2,index,kFALSE);
3374 besttrack = (AliITStrackMI*)array->At(index[0]);
3375 if(besttrack) AliDebug(2,Form("ncls best track %d\n",besttrack->GetNumberOfClusters()));
3376 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3377 for (Int_t j=0;j<6;j++){
3378 if (besttrack->GetClIndex(j)>=0){
3379 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3380 errz[j] = besttrack->GetSigmaZ(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3381 ny[j] = besttrack->GetNy(j);
3382 nz[j] = besttrack->GetNz(j);
3383 }
3384 }
3385 }
3386 //
3387 // calculate one more time with updated normalized errors
3388 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3389 for (Int_t itrack=0;itrack<entries;itrack++){
3390 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3391 if (track){
3392 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3393 AliDebug(2,Form("track %d ncls %d\n",itrack,track->GetNumberOfClusters()));
3394 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3395 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
3396 else
3397 {
3398 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3399 delete array->RemoveAt(itrack);
3400 }
3401 }
3402 }
3403 }
3404 entries = array->GetEntriesFast();
3405 //
3406 //
3407 if (entries>0){
3408 TObjArray * newarray = new TObjArray();
3409 TMath::Sort(entries,chi2,index,kFALSE);
3410 besttrack = (AliITStrackMI*)array->At(index[0]);
3411 if (besttrack){
3412 AliDebug(2,Form("ncls best track %d %f %f\n",besttrack->GetNumberOfClusters(),besttrack->GetChi2MIP(0),chi2[index[0]]));
3413 //
3414 for (Int_t j=0;j<6;j++){
3415 if (besttrack->GetNz(j)>0&&besttrack->GetNy(j)>0){
3416 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3417 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3418 ny[j] = besttrack->GetNy(j);
3419 nz[j] = besttrack->GetNz(j);
3420 }
3421 }
3422 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
3423 minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
3424 Float_t minn = besttrack->GetNumberOfClusters()-3;
3425 Int_t accepted=0;
3426 for (Int_t i=0;i<entries;i++){
3427 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
3428 if (!track) continue;
3429 if (accepted>maxcut) break;
3430 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3431 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3432 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
3433 delete array->RemoveAt(index[i]);
3434 continue;
3435 }
3436 }
3437 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
3438 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
3439 if (!shortbest) accepted++;
3440 //
3441 newarray->AddLast(array->RemoveAt(index[i]));
3442 for (Int_t j=0;j<6;j++){
3443 if (nz[j]==0){
3444 erry[j] = track->GetSigmaY(j); erry[j+6] = track->GetSigmaY(j+6);
3445 errz[j] = track->GetSigmaZ(j); errz[j] = track->GetSigmaZ(j+6);
3446 ny[j] = track->GetNy(j);
3447 nz[j] = track->GetNz(j);
3448 }
3449 }
3450 }
3451 else{
3452 delete array->RemoveAt(index[i]);
3453 }
3454 }
3455 array->Delete();
3456 delete fTrackHypothesys.RemoveAt(esdindex);
3457 fTrackHypothesys.AddAt(newarray,esdindex);
3458 }
3459 else{
3460 array->Delete();
3461 delete fTrackHypothesys.RemoveAt(esdindex);
3462 }
3463 }
3464 delete [] chi2;
3465 delete [] index;
3466}
3467//------------------------------------------------------------------------
3468AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
3469{
3470 //-------------------------------------------------------------
3471 // try to find best hypothesy
3472 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
3473 //-------------------------------------------------------------
3474 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
3475 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3476 if (!array) return 0;
3477 Int_t entries = array->GetEntriesFast();
3478 if (!entries) return 0;
3479 Float_t minchi2 = 100000;
3480 AliITStrackMI * besttrack=0;
3481 //
3482 AliITStrackMI * backtrack = new AliITStrackMI(*original);
3483 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
3484 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
3485 Double_t ersVtx[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
3486 //
3487 for (Int_t i=0;i<entries;i++){
3488 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3489 if (!track) continue;
3490 Float_t sigmarfi,sigmaz;
3491 GetDCASigma(track,sigmarfi,sigmaz);
3492 track->SetDnorm(0,sigmarfi);
3493 track->SetDnorm(1,sigmaz);
3494 //
3495 track->SetChi2MIP(1,1000000);
3496 track->SetChi2MIP(2,1000000);
3497 track->SetChi2MIP(3,1000000);
3498 //
3499 // backtrack
3500 backtrack = new(backtrack) AliITStrackMI(*track);
3501 if (track->GetConstrain()) {
3502 if (!CorrectForPipeMaterial(backtrack,"inward")) continue;
3503 if (AliITSReconstructor::GetRecoParam()->GetImproveWithVertex()) {
3504 if (!backtrack->Improve(0,xyzVtx,ersVtx)) continue;
3505 }
3506 backtrack->ResetCovariance(10.);
3507 }else{
3508 backtrack->ResetCovariance(10.);
3509 }
3510 backtrack->ResetClusters();
3511
3512 Double_t x = original->GetX();
3513 if (!RefitAt(x,backtrack,track)) continue;
3514 //
3515 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
3516 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
3517 if (track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)*6.) continue;
3518 track->SetChi22(GetMatchingChi2(backtrack,original));
3519
3520 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
3521 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
3522 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
3523
3524
3525 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)) continue;
3526 //
3527 //forward track - without constraint
3528 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
3529 forwardtrack->ResetClusters();
3530 x = track->GetX();
3531 RefitAt(x,forwardtrack,track);
3532 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
3533 if (track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)*6.0) continue;
3534 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)) continue;
3535
3536 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
3537 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3538 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
3539 forwardtrack->SetD(0,track->GetD(0));
3540 forwardtrack->SetD(1,track->GetD(1));
3541 {
3542 Int_t list[6];
3543 AliITSRecPoint* clist[6];
3544 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
3545 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
3546 }
3547
3548 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
3549 if ( (track->GetChi2MIP(3)>6.*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) continue;
3550 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) {
3551 track->SetChi2MIP(3,1000);
3552 continue;
3553 }
3554 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
3555 //
3556 for (Int_t ichi=0;ichi<5;ichi++){
3557 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
3558 }
3559 if (chi2 < minchi2){
3560 //besttrack = new AliITStrackMI(*forwardtrack);
3561 besttrack = track;
3562 besttrack->SetLabel(track->GetLabel());
3563 besttrack->SetFakeRatio(track->GetFakeRatio());
3564 minchi2 = chi2;
3565 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
3566 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3567 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
3568 }
3569 }
3570 delete backtrack;
3571 delete forwardtrack;
3572
3573 if (!besttrack) return 0;
3574
3575 Int_t accepted=0;
3576 for (Int_t i=0;i<entries;i++){
3577 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3578
3579 if (!track) continue;
3580
3581 if (accepted>checkmax || track->GetChi2MIP(3)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)*6. ||
3582 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
3583 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
3584 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3585 delete array->RemoveAt(i);
3586 continue;
3587 }
3588 }
3589 else{
3590 accepted++;
3591 }
3592 }
3593 //
3594 array->Compress();
3595 SortTrackHypothesys(esdindex,checkmax,1);
3596
3597 array = (TObjArray*) fTrackHypothesys.At(esdindex);
3598 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
3599 besttrack = (AliITStrackMI*)array->At(0);
3600 if (!besttrack) return 0;
3601 besttrack->SetChi2MIP(8,0);
3602 fBestTrackIndex[esdindex]=0;
3603 entries = array->GetEntriesFast();
3604 AliITStrackMI *longtrack =0;
3605 minchi2 =1000;
3606 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
3607 for (Int_t itrack=entries-1;itrack>0;itrack--) {
3608 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3609 if (!track->GetConstrain()) continue;
3610 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3611 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
3612 if (track->GetChi2MIP(0)>4.) continue;
3613 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
3614 longtrack =track;
3615 }
3616 //if (longtrack) besttrack=longtrack;
3617
3618 Int_t list[6];
3619 AliITSRecPoint * clist[6];
3620 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3621 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&besttrack->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3622 &&besttrack->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&besttrack->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3623 RegisterClusterTracks(besttrack,esdindex);
3624 }
3625 //
3626 //
3627 if (shared>0.0){
3628 Int_t nshared;
3629 Int_t overlist[6];
3630 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
3631 if (sharedtrack>=0){
3632 //
3633 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
3634 if (besttrack){
3635 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3636 }
3637 else return 0;
3638 }
3639 }
3640
3641 if (shared>2.5) return 0;
3642 if (shared>1.0) return besttrack;
3643 //
3644 // Don't sign clusters if not gold track
3645 //
3646 if (!besttrack->IsGoldPrimary()) return besttrack;
3647 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
3648 //
3649 if (fConstraint[fPass]){
3650 //
3651 // sign clusters
3652 //
3653 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3654 for (Int_t i=0;i<6;i++){
3655 Int_t index = besttrack->GetClIndex(i);
3656 if (index<0) continue;
3657 Int_t ilayer = (index & 0xf0000000) >> 28;
3658 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
3659 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
3660 if (!c) continue;
3661 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3662 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3663 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
3664 if ( ilayer>2&& AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(ilayer))
3665 if (besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
3666 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3667
3668 Bool_t cansign = kTRUE;
3669 for (Int_t itrack=0;itrack<entries; itrack++){
3670 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3671 if (!track) continue;
3672 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3673 if ( (track->GetClIndex(ilayer)>=0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
3674 cansign = kFALSE;
3675 break;
3676 }
3677 }
3678 if (cansign){
3679 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3680 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
3681 if (!c->IsUsed()) c->Use();
3682 }
3683 }
3684 }
3685 return besttrack;
3686}
3687//------------------------------------------------------------------------
3688void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3689{
3690 //
3691 // get "best" hypothesys
3692 //
3693
3694 Int_t nentries = itsTracks.GetEntriesFast();
3695 for (Int_t i=0;i<nentries;i++){
3696 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3697 if (!track) continue;
3698 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3699 if (!array) continue;
3700 if (array->GetEntriesFast()<=0) continue;
3701 //
3702 AliITStrackMI* longtrack=0;
3703 Float_t minn=0;
3704 Float_t maxchi2=1000;
3705 for (Int_t j=0;j<array->GetEntriesFast();j++){
3706 AliITStrackMI* trackHyp = (AliITStrackMI*)array->At(j);
3707 if (!trackHyp) continue;
3708 if (trackHyp->GetGoldV0()) {
3709 longtrack = trackHyp; //gold V0 track taken
3710 break;
3711 }
3712 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()<minn) continue;
3713 Float_t chi2 = trackHyp->GetChi2MIP(0);
3714 if (fAfterV0){
3715 if (!trackHyp->GetGoldV0()&&trackHyp->GetConstrain()==kFALSE) chi2+=5;
3716 }
3717 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()>minn) maxchi2 = trackHyp->GetChi2MIP(0);
3718 //
3719 if (chi2 > maxchi2) continue;
3720 minn= trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone();
3721 maxchi2 = chi2;
3722 longtrack=trackHyp;
3723 }
3724 //
3725 //
3726 //
3727 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3728 if (!longtrack) {longtrack = besttrack;}
3729 else besttrack= longtrack;
3730 //
3731 if (besttrack) {
3732 Int_t list[6];
3733 AliITSRecPoint * clist[6];
3734 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3735 //
3736 track->SetNUsed(shared);
3737 track->SetNSkipped(besttrack->GetNSkipped());
3738 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3739 if (shared>0) {
3740 if(!AliITSReconstructor::GetRecoParam()->GetAllowSharedClusters()) continue;
3741 Int_t nshared;
3742 Int_t overlist[6];
3743 //
3744 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3745 //if (sharedtrack==-1) sharedtrack=0;
3746 if (sharedtrack>=0) {
3747 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3748 }
3749 }
3750 if (besttrack&&fAfterV0) {
3751 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3752 }
3753 if (besttrack) {
3754 if (fConstraint[fPass]) UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3755 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5 && fConstraint[fPass]) {
3756 if ( TMath::Abs(besttrack->GetD(0))>0.1 ||
3757 TMath::Abs(besttrack->GetD(1))>0.1 ) track->SetReconstructed(kFALSE);
3758 }
3759 }
3760 }
3761 }
3762}
3763//------------------------------------------------------------------------
3764void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3765 //--------------------------------------------------------------------
3766 //This function "cooks" a track label. If label<0, this track is fake.
3767 //--------------------------------------------------------------------
3768 Int_t tpcLabel=-1;
3769
3770 if (track->GetESDtrack()){
3771 tpcLabel = track->GetESDtrack()->GetTPCLabel();
3772 ULong_t trStatus=track->GetESDtrack()->GetStatus();
3773 if(!(trStatus&AliESDtrack::kTPCin)) tpcLabel=track->GetLabel(); // for ITSsa tracks
3774 }
3775 track->SetChi2MIP(9,0);
3776 Int_t nwrong=0;
3777 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3778 Int_t cindex = track->GetClusterIndex(i);
3779 Int_t l=(cindex & 0xf0000000) >> 28;
3780 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3781 Int_t isWrong=1;
3782 for (Int_t ind=0;ind<3;ind++){
3783 if (cl->GetLabel(ind)==TMath::Abs(tpcLabel)) isWrong=0;
3784 //AliDebug(2,Form("icl %d ilab %d lab %d",i,ind,cl->GetLabel(ind)));
3785 }
3786 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3787 nwrong+=isWrong;
3788 }
3789 Int_t nclusters = track->GetNumberOfClusters();
3790 if (nclusters > 0) //PH Some tracks don't have any cluster
3791 track->SetFakeRatio(double(nwrong)/double(nclusters));
3792 if (tpcLabel>0 && track->GetFakeRatio()>wrong) {
3793 track->SetLabel(-tpcLabel);
3794 } else {
3795 track->SetLabel(tpcLabel);
3796 }
3797 AliDebug(2,Form(" nls %d wrong %d label %d tpcLabel %d\n",nclusters,nwrong,track->GetLabel(),tpcLabel));
3798
3799}
3800//------------------------------------------------------------------------
3801void AliITStrackerMI::CookdEdx(AliITStrackMI* track){
3802 //
3803 // Fill the dE/dx in this track
3804 //
3805 track->SetChi2MIP(9,0);
3806 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3807 Int_t cindex = track->GetClusterIndex(i);
3808 Int_t l=(cindex & 0xf0000000) >> 28;
3809 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3810 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3811 Int_t isWrong=1;
3812 for (Int_t ind=0;ind<3;ind++){
3813 if (cl->GetLabel(ind)==lab) isWrong=0;
3814 }
3815 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3816 }
3817 Double_t low=0.;
3818 Double_t up=0.51;
3819 track->CookdEdx(low,up);
3820}
3821//------------------------------------------------------------------------
3822void AliITStrackerMI::MakeCoefficients(Int_t ntracks){
3823 //
3824 // Create some arrays
3825 //
3826 if (fCoefficients) delete []fCoefficients;
3827 fCoefficients = new Float_t[ntracks*48];
3828 for (Int_t i=0;i<ntracks*48;i++) fCoefficients[i]=-1.;
3829}
3830//------------------------------------------------------------------------
3831Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3832{
3833 //
3834 // Compute predicted chi2
3835 //
3836 // Take into account the mis-alignment (bring track to cluster plane)
3837 Double_t xTrOrig=track->GetX();
3838 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
3839 Float_t erry,errz,covyz;
3840 Float_t theta = track->GetTgl();
3841 Float_t phi = track->GetSnp();
3842 phi *= TMath::Sqrt(1./((1.-phi)*(1.+phi)));
3843 AliITSClusterParam::GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz,covyz);
3844 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()));
3845 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()));
3846 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz,covyz);
3847 // Bring the track back to detector plane in ideal geometry
3848 // [mis-alignment will be accounted for in UpdateMI()]
3849 if (!track->Propagate(xTrOrig)) return 1000.;
3850 Float_t ny,nz;
3851 AliITSClusterParam::GetNTeor(layer,cluster,theta,phi,ny,nz);
3852 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3853 if (delta>1){
3854 chi2+=0.5*TMath::Min(delta/2,2.);
3855 chi2+=2.*cluster->GetDeltaProbability();
3856 }
3857 //
3858 track->SetNy(layer,ny);
3859 track->SetNz(layer,nz);
3860 track->SetSigmaY(layer,erry);
3861 track->SetSigmaZ(layer, errz);
3862 track->SetSigmaYZ(layer,covyz);
3863 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3864 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
3865 return chi2;
3866
3867}
3868//------------------------------------------------------------------------
3869Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3870{
3871 //
3872 // Update ITS track
3873 //
3874 Int_t layer = (index & 0xf0000000) >> 28;
3875 track->SetClIndex(layer, index);
3876 if (layer>1&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(layer)) {
3877 if (track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3878 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3879 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3880 }
3881 }
3882
3883 if (TMath::Abs(cl->GetQ())<1.e-13) return 0; // ingore the "virtual" clusters
3884
3885
3886 // Take into account the mis-alignment (bring track to cluster plane)
3887 Double_t xTrOrig=track->GetX();
3888 Float_t clxyz[3]; cl->GetGlobalXYZ(clxyz);Double_t trxyz[3]; track->GetXYZ(trxyz);
3889 AliDebug(2,Form("gtr %f %f %f",trxyz[0],trxyz[1],trxyz[2]));
3890 AliDebug(2,Form("gcl %f %f %f",clxyz[0],clxyz[1],clxyz[2]));
3891 AliDebug(2,Form(" xtr %f xcl %f",track->GetX(),cl->GetX()));
3892
3893 if (!track->Propagate(xTrOrig+cl->GetX())) return 0;
3894
3895 AliCluster c(*cl);
3896 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
3897 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
3898 c.SetSigmaYZ(track->GetSigmaYZ(layer));
3899
3900
3901 Int_t updated = track->UpdateMI(&c,chi2,index);
3902 // Bring the track back to detector plane in ideal geometry
3903 if (!track->Propagate(xTrOrig)) return 0;
3904
3905 if(!updated) AliDebug(2,"update failed");
3906 return updated;
3907}
3908
3909//------------------------------------------------------------------------
3910void AliITStrackerMI::GetDCASigma(const AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3911{
3912 //
3913 //DCA sigmas parameterization
3914 //to be paramterized using external parameters in future
3915 //
3916 //
3917 sigmarfi = 0.0040+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3918 sigmaz = 0.0110+4.37*TMath::Abs(track->GetC());
3919}
3920//------------------------------------------------------------------------
3921void AliITStrackerMI::SignDeltas(const TObjArray *clusterArray, Float_t vz)
3922{
3923 //
3924 // Clusters from delta electrons?
3925 //
3926 Int_t entries = clusterArray->GetEntriesFast();
3927 if (entries<4) return;
3928 AliITSRecPoint* cluster = (AliITSRecPoint*)clusterArray->At(0);
3929 Int_t layer = cluster->GetLayer();
3930 if (layer>1) return;
3931 Int_t index[10000];
3932 Int_t ncandidates=0;
3933 Float_t r = (layer>0)? 7:4;
3934 //
3935 for (Int_t i=0;i<entries;i++){
3936 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(i);
3937 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3938 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3939 index[ncandidates] = i; //candidate to belong to delta electron track
3940 ncandidates++;
3941 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3942 cl0->SetDeltaProbability(1);
3943 }
3944 }
3945 //
3946 //
3947 //
3948 for (Int_t i=0;i<ncandidates;i++){
3949 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(index[i]);
3950 if (cl0->GetDeltaProbability()>0.8) continue;
3951 //
3952 Int_t ncl = 0;
3953 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3954 sumy=sumz=sumy2=sumyz=sumw=0.0;
3955 for (Int_t j=0;j<ncandidates;j++){
3956 if (i==j) continue;
3957 AliITSRecPoint* cl1 = (AliITSRecPoint*)clusterArray->At(index[j]);
3958 //
3959 Float_t dz = cl0->GetZ()-cl1->GetZ();
3960 Float_t dy = cl0->GetY()-cl1->GetY();
3961 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3962 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3963 y[ncl] = cl1->GetY();
3964 z[ncl] = cl1->GetZ();
3965 sumy+= y[ncl]*weight;
3966 sumz+= z[ncl]*weight;
3967 sumy2+=y[ncl]*y[ncl]*weight;
3968 sumyz+=y[ncl]*z[ncl]*weight;
3969 sumw+=weight;
3970 ncl++;
3971 }
3972 }
3973 if (ncl<4) continue;
3974 Float_t det = sumw*sumy2 - sumy*sumy;
3975 Float_t delta=1000;
3976 if (TMath::Abs(det)>0.01){
3977 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3978 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3979 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3980 }
3981 else{
3982 Float_t z0 = sumyz/sumy;
3983 delta = TMath::Abs(cl0->GetZ()-z0);
3984 }
3985 if ( delta<0.05) {
3986 cl0->SetDeltaProbability(1-20.*delta);
3987 }
3988 }
3989}
3990//------------------------------------------------------------------------
3991void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3992{
3993 //
3994 // Update ESD track
3995 //
3996 track->UpdateESDtrack(flags);
3997 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3998 if (oldtrack) delete oldtrack;
3999 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
4000 // if (TMath::Abs(track->GetDnorm(1))<0.000000001){
4001 // printf("Problem\n");
4002 // }
4003}
4004//------------------------------------------------------------------------
4005Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
4006 //
4007 // Get nearest upper layer close to the point xr.
4008 // rough approximation
4009 //
4010 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
4011 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
4012 Int_t res =6;
4013 for (Int_t i=0;i<6;i++){
4014 if (radius<kRadiuses[i]){
4015 res =i;
4016 break;
4017 }
4018 }
4019 return res;
4020}
4021//------------------------------------------------------------------------
4022void AliITStrackerMI::BuildMaterialLUT(TString material) {
4023 //--------------------------------------------------------------------
4024 // Fill a look-up table with mean material
4025 //--------------------------------------------------------------------
4026
4027 Int_t n=1000;
4028 Double_t mparam[7];
4029 Double_t point1[3],point2[3];
4030 Double_t phi,cosphi,sinphi,z;
4031 // 0-5 layers, 6 pipe, 7-8 shields
4032 Double_t rmin[9]={ 3.5, 5.5,13.0,22.0,35.0,41.0, 2.0, 8.0,25.0};
4033 Double_t rmax[9]={ 5.5, 8.0,17.0,26.0,41.0,47.0, 3.0,10.5,30.0};
4034
4035 Int_t ifirst=0,ilast=0;
4036 if(material.Contains("Pipe")) {
4037 ifirst=6; ilast=6;
4038 } else if(material.Contains("Shields")) {
4039 ifirst=7; ilast=8;
4040 } else if(material.Contains("Layers")) {
4041 ifirst=0; ilast=5;
4042 } else {
4043 Error("BuildMaterialLUT","Wrong layer name\n");
4044 }
4045
4046 for(Int_t imat=ifirst; imat<=ilast; imat++) {
4047 Double_t param[5]={0.,0.,0.,0.,0.};
4048 for (Int_t i=0; i<n; i++) {
4049 phi = 2.*TMath::Pi()*gRandom->Rndm();
4050 cosphi = TMath::Cos(phi); sinphi = TMath::Sin(phi);
4051 z = 14.*(-1.+2.*gRandom->Rndm()); // SPD barrel
4052 point1[0] = rmin[imat]*cosphi;
4053 point1[1] = rmin[imat]*sinphi;
4054 point1[2] = z;
4055 point2[0] = rmax[imat]*cosphi;
4056 point2[1] = rmax[imat]*sinphi;
4057 point2[2] = z;
4058 AliTracker::MeanMaterialBudget(point1,point2,mparam);
4059 for(Int_t j=0;j<5;j++) param[j]+=mparam[j];
4060 }
4061 for(Int_t j=0;j<5;j++) param[j]/=(Float_t)n;
4062 if(imat<=5) {
4063 fxOverX0Layer[imat] = param[1];
4064 fxTimesRhoLayer[imat] = param[0]*param[4];
4065 } else if(imat==6) {
4066 fxOverX0Pipe = param[1];
4067 fxTimesRhoPipe = param[0]*param[4];
4068 } else if(imat==7) {
4069 fxOverX0Shield[0] = param[1];
4070 fxTimesRhoShield[0] = param[0]*param[4];
4071 } else if(imat==8) {
4072 fxOverX0Shield[1] = param[1];
4073 fxTimesRhoShield[1] = param[0]*param[4];
4074 }
4075 }
4076 /*
4077 printf("%s\n",material.Data());
4078 printf("%f %f\n",fxOverX0Pipe,fxTimesRhoPipe);
4079 printf("%f %f\n",fxOverX0Shield[0],fxTimesRhoShield[0]);
4080 printf("%f %f\n",fxOverX0Shield[1],fxTimesRhoShield[1]);
4081 printf("%f %f\n",fxOverX0Layer[0],fxTimesRhoLayer[0]);
4082 printf("%f %f\n",fxOverX0Layer[1],fxTimesRhoLayer[1]);
4083 printf("%f %f\n",fxOverX0Layer[2],fxTimesRhoLayer[2]);
4084 printf("%f %f\n",fxOverX0Layer[3],fxTimesRhoLayer[3]);
4085 printf("%f %f\n",fxOverX0Layer[4],fxTimesRhoLayer[4]);
4086 printf("%f %f\n",fxOverX0Layer[5],fxTimesRhoLayer[5]);
4087 */
4088 return;
4089}
4090//------------------------------------------------------------------------
4091Int_t AliITStrackerMI::CorrectForPipeMaterial(AliITStrackMI *t,
4092 TString direction) {
4093 //-------------------------------------------------------------------
4094 // Propagate beyond beam pipe and correct for material
4095 // (material budget in different ways according to fUseTGeo value)
4096 // Add time if going outward (PropagateTo or PropagateToTGeo)
4097 //-------------------------------------------------------------------
4098
4099 // Define budget mode:
4100 // 0: material from AliITSRecoParam (hard coded)
4101 // 1: material from TGeo in one step (on the fly)
4102 // 2: material from lut
4103 // 3: material from TGeo in one step (same for all hypotheses)
4104 Int_t mode;
4105 switch(fUseTGeo) {
4106 case 0:
4107 mode=0;
4108 break;
4109 case 1:
4110 mode=1;
4111 break;
4112 case 2:
4113 mode=2;
4114 break;
4115 case 3:
4116 if(fTrackingPhase.Contains("Clusters2Tracks"))
4117 { mode=3; } else { mode=1; }
4118 break;
4119 case 4:
4120 if(fTrackingPhase.Contains("Clusters2Tracks"))
4121 { mode=3; } else { mode=2; }
4122 break;
4123 default:
4124 mode=0;
4125 break;
4126 }
4127 if(fTrackingPhase.Contains("Default")) mode=0;
4128
4129 Int_t index=fCurrentEsdTrack;
4130
4131 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4132 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
4133 Double_t xToGo;
4134 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4135
4136 Double_t xOverX0,x0,lengthTimesMeanDensity;
4137
4138 switch(mode) {
4139 case 0:
4140 xOverX0 = AliITSRecoParam::GetdPipe();
4141 x0 = AliITSRecoParam::GetX0Be();
4142 lengthTimesMeanDensity = xOverX0*x0;
4143 lengthTimesMeanDensity *= dir;
4144 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4145 break;
4146 case 1:
4147 if (!t->PropagateToTGeo(xToGo,1)) return 0;
4148 break;
4149 case 2:
4150 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
4151 xOverX0 = fxOverX0Pipe;
4152 lengthTimesMeanDensity = fxTimesRhoPipe;
4153 lengthTimesMeanDensity *= dir;
4154 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4155 break;
4156 case 3:
4157 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
4158 if(fxOverX0PipeTrks[index]<0) {
4159 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4160 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4161 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4162 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
4163 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4164 return 1;
4165 }
4166 xOverX0 = fxOverX0PipeTrks[index];
4167 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
4168 lengthTimesMeanDensity *= dir;
4169 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4170 break;
4171 }
4172
4173 return 1;
4174}
4175//------------------------------------------------------------------------
4176Int_t AliITStrackerMI::CorrectForShieldMaterial(AliITStrackMI *t,
4177 TString shield,
4178 TString direction) {
4179 //-------------------------------------------------------------------
4180 // Propagate beyond SPD or SDD shield and correct for material
4181 // (material budget in different ways according to fUseTGeo value)
4182 // Add time if going outward (PropagateTo or PropagateToTGeo)
4183 //-------------------------------------------------------------------
4184
4185 // Define budget mode:
4186 // 0: material from AliITSRecoParam (hard coded)
4187 // 1: material from TGeo in steps of X cm (on the fly)
4188 // X = AliITSRecoParam::GetStepSizeTGeo()
4189 // 2: material from lut
4190 // 3: material from TGeo in one step (same for all hypotheses)
4191 Int_t mode;
4192 switch(fUseTGeo) {
4193 case 0:
4194 mode=0;
4195 break;
4196 case 1:
4197 mode=1;
4198 break;
4199 case 2:
4200 mode=2;
4201 break;
4202 case 3:
4203 if(fTrackingPhase.Contains("Clusters2Tracks"))
4204 { mode=3; } else { mode=1; }
4205 break;
4206 case 4:
4207 if(fTrackingPhase.Contains("Clusters2Tracks"))
4208 { mode=3; } else { mode=2; }
4209 break;
4210 default:
4211 mode=0;
4212 break;
4213 }
4214 if(fTrackingPhase.Contains("Default")) mode=0;
4215
4216 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4217 Double_t rToGo;
4218 Int_t shieldindex=0;
4219 if (shield.Contains("SDD")) { // SDDouter
4220 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(1) : AliITSRecoParam::GetrOutsideShield(1));
4221 shieldindex=1;
4222 } else if (shield.Contains("SPD")) { // SPDouter
4223 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(0) : AliITSRecoParam::GetrOutsideShield(0));
4224 shieldindex=0;
4225 } else {
4226 Error("CorrectForShieldMaterial"," Wrong shield name\n");
4227 return 0;
4228 }
4229
4230 // do nothing if we are already beyond the shield
4231 Double_t rTrack = TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY());
4232 if(dir<0 && rTrack > rToGo) return 1; // going outward
4233 if(dir>0 && rTrack < rToGo) return 1; // going inward
4234
4235
4236 Double_t xToGo;
4237 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4238
4239 Int_t index=2*fCurrentEsdTrack+shieldindex;
4240
4241 Double_t xOverX0,x0,lengthTimesMeanDensity;
4242 Int_t nsteps=1;
4243
4244 switch(mode) {
4245 case 0:
4246 xOverX0 = AliITSRecoParam::Getdshield(shieldindex);
4247 x0 = AliITSRecoParam::GetX0shield(shieldindex);
4248 lengthTimesMeanDensity = xOverX0*x0;
4249 lengthTimesMeanDensity *= dir;
4250 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4251 break;
4252 case 1:
4253 nsteps= (Int_t)(TMath::Abs(t->GetX()-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4254 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4255 break;
4256 case 2:
4257 if(fxOverX0Shield[shieldindex]<0) BuildMaterialLUT("Shields");
4258 xOverX0 = fxOverX0Shield[shieldindex];
4259 lengthTimesMeanDensity = fxTimesRhoShield[shieldindex];
4260 lengthTimesMeanDensity *= dir;
4261 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4262 break;
4263 case 3:
4264 if(!fxOverX0ShieldTrks || index<0 || index>=2*fNtracks) Error("CorrectForShieldMaterial","Incorrect usage of UseTGeo option!\n");
4265 if(fxOverX0ShieldTrks[index]<0) {
4266 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4267 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4268 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4269 fxOverX0ShieldTrks[index] = TMath::Abs(xOverX0)/angle;
4270 fxTimesRhoShieldTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4271 return 1;
4272 }
4273 xOverX0 = fxOverX0ShieldTrks[index];
4274 lengthTimesMeanDensity = fxTimesRhoShieldTrks[index];
4275 lengthTimesMeanDensity *= dir;
4276 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4277 break;
4278 }
4279
4280 return 1;
4281}
4282//------------------------------------------------------------------------
4283Int_t AliITStrackerMI::CorrectForLayerMaterial(AliITStrackMI *t,
4284 Int_t layerindex,
4285 Double_t oldGlobXYZ[3],
4286 TString direction) {
4287 //-------------------------------------------------------------------
4288 // Propagate beyond layer and correct for material
4289 // (material budget in different ways according to fUseTGeo value)
4290 // Add time if going outward (PropagateTo or PropagateToTGeo)
4291 //-------------------------------------------------------------------
4292
4293 // Define budget mode:
4294 // 0: material from AliITSRecoParam (hard coded)
4295 // 1: material from TGeo in stepsof X cm (on the fly)
4296 // X = AliITSRecoParam::GetStepSizeTGeo()
4297 // 2: material from lut
4298 // 3: material from TGeo in one step (same for all hypotheses)
4299 Int_t mode;
4300 switch(fUseTGeo) {
4301 case 0:
4302 mode=0;
4303 break;
4304 case 1:
4305 mode=1;
4306 break;
4307 case 2:
4308 mode=2;
4309 break;
4310 case 3:
4311 if(fTrackingPhase.Contains("Clusters2Tracks"))
4312 { mode=3; } else { mode=1; }
4313 break;
4314 case 4:
4315 if(fTrackingPhase.Contains("Clusters2Tracks"))
4316 { mode=3; } else { mode=2; }
4317 break;
4318 default:
4319 mode=0;
4320 break;
4321 }
4322 if(fTrackingPhase.Contains("Default")) mode=0;
4323
4324 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4325
4326 Double_t r=fgLayers[layerindex].GetR();
4327 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
4328
4329 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
4330 Double_t xToGo;
4331 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4332
4333 Int_t index=6*fCurrentEsdTrack+layerindex;
4334
4335
4336 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
4337 Int_t nsteps=1;
4338
4339 // back before material (no correction)
4340 Double_t rOld,xOld;
4341 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
4342 if (!t->GetLocalXat(rOld,xOld)) return 0;
4343 if (!t->Propagate(xOld)) return 0;
4344
4345 switch(mode) {
4346 case 0:
4347 xOverX0 = fgLayers[layerindex].GetThickness(t->GetY(),t->GetZ(),x0);
4348 lengthTimesMeanDensity = xOverX0*x0;
4349 lengthTimesMeanDensity *= dir;
4350 // Bring the track beyond the material
4351 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4352 break;
4353 case 1:
4354 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4355 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4356 break;
4357 case 2:
4358 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
4359 xOverX0 = fxOverX0Layer[layerindex];
4360 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
4361 lengthTimesMeanDensity *= dir;
4362 // Bring the track beyond the material
4363 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4364 break;
4365 case 3:
4366 if(!fxOverX0LayerTrks || index<0 || index>=6*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
4367 if(fxOverX0LayerTrks[index]<0) {
4368 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4369 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
4370 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4371 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4372 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
4373 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4374 return 1;
4375 }
4376 xOverX0 = fxOverX0LayerTrks[index];
4377 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
4378 lengthTimesMeanDensity *= dir;
4379 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4380 break;
4381 }
4382
4383
4384 return 1;
4385}
4386//------------------------------------------------------------------------
4387void AliITStrackerMI::MakeTrksMaterialLUT(Int_t ntracks) {
4388 //-----------------------------------------------------------------
4389 // Initialize LUT for storing material for each prolonged track
4390 //-----------------------------------------------------------------
4391 fxOverX0PipeTrks = new Float_t[ntracks];
4392 fxTimesRhoPipeTrks = new Float_t[ntracks];
4393 fxOverX0ShieldTrks = new Float_t[ntracks*2];
4394 fxTimesRhoShieldTrks = new Float_t[ntracks*2];
4395 fxOverX0LayerTrks = new Float_t[ntracks*6];
4396 fxTimesRhoLayerTrks = new Float_t[ntracks*6];
4397
4398 for(Int_t i=0; i<ntracks; i++) {
4399 fxOverX0PipeTrks[i] = -1.;
4400 fxTimesRhoPipeTrks[i] = -1.;
4401 }
4402 for(Int_t j=0; j<ntracks*2; j++) {
4403 fxOverX0ShieldTrks[j] = -1.;
4404 fxTimesRhoShieldTrks[j] = -1.;
4405 }
4406 for(Int_t k=0; k<ntracks*6; k++) {
4407 fxOverX0LayerTrks[k] = -1.;
4408 fxTimesRhoLayerTrks[k] = -1.;
4409 }
4410
4411 fNtracks = ntracks;
4412
4413 return;
4414}
4415//------------------------------------------------------------------------
4416void AliITStrackerMI::DeleteTrksMaterialLUT() {
4417 //-----------------------------------------------------------------
4418 // Delete LUT for storing material for each prolonged track
4419 //-----------------------------------------------------------------
4420 if(fxOverX0PipeTrks) {
4421 delete [] fxOverX0PipeTrks; fxOverX0PipeTrks = 0;
4422 }
4423 if(fxOverX0ShieldTrks) {
4424 delete [] fxOverX0ShieldTrks; fxOverX0ShieldTrks = 0;
4425 }
4426
4427 if(fxOverX0LayerTrks) {
4428 delete [] fxOverX0LayerTrks; fxOverX0LayerTrks = 0;
4429 }
4430 if(fxTimesRhoPipeTrks) {
4431 delete [] fxTimesRhoPipeTrks; fxTimesRhoPipeTrks = 0;
4432 }
4433 if(fxTimesRhoShieldTrks) {
4434 delete [] fxTimesRhoShieldTrks; fxTimesRhoShieldTrks = 0;
4435 }
4436 if(fxTimesRhoLayerTrks) {
4437 delete [] fxTimesRhoLayerTrks; fxTimesRhoLayerTrks = 0;
4438 }
4439 return;
4440}
4441//------------------------------------------------------------------------
4442void AliITStrackerMI::SetForceSkippingOfLayer() {
4443 //-----------------------------------------------------------------
4444 // Check if we are forced to skip layers
4445 // either we set to skip them in RecoParam
4446 // or they were off during data-taking
4447 //-----------------------------------------------------------------
4448
4449 const AliEventInfo *eventInfo = GetEventInfo();
4450
4451 for(Int_t l=0; l<AliITSgeomTGeo::kNLayers; l++) {
4452 fForceSkippingOfLayer[l] = 0;
4453 // check reco param
4454 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(l)) fForceSkippingOfLayer[l] = 1;
4455 // check run info
4456
4457 if(eventInfo &&
4458 AliITSReconstructor::GetRecoParam()->GetSkipSubdetsNotInTriggerCluster()) {
4459 AliDebug(2,Form("GetEventInfo->GetTriggerCluster: %s",eventInfo->GetTriggerCluster()));
4460 if(l==0 || l==1) {
4461 if(!strstr(eventInfo->GetTriggerCluster(),"ITSSPD")) fForceSkippingOfLayer[l] = 1;
4462 } else if(l==2 || l==3) {
4463 if(!strstr(eventInfo->GetTriggerCluster(),"ITSSDD")) fForceSkippingOfLayer[l] = 1;
4464 } else {
4465 if(!strstr(eventInfo->GetTriggerCluster(),"ITSSSD")) fForceSkippingOfLayer[l] = 1;
4466 }
4467 }
4468 }
4469 return;
4470}
4471//------------------------------------------------------------------------
4472Int_t AliITStrackerMI::CheckSkipLayer(const AliITStrackMI *track,
4473 Int_t ilayer,Int_t idet) const {
4474 //-----------------------------------------------------------------
4475 // This method is used to decide whether to allow a prolongation
4476 // without clusters, because we want to skip the layer.
4477 // In this case the return value is > 0:
4478 // return 1: the user requested to skip a layer
4479 // return 2: track outside z acceptance
4480 //-----------------------------------------------------------------
4481
4482 if (ForceSkippingOfLayer(ilayer)) return 1;
4483
4484 Int_t innerLayCanSkip=0; // was 2, changed on 05.11.2009
4485
4486 if (idet<0 && // out in z
4487 ilayer>innerLayCanSkip &&
4488 AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance()) {
4489 // check if track will cross SPD outer layer
4490 Double_t phiAtSPD2,zAtSPD2;
4491 if (track->GetPhiZat(fgLayers[1].GetR(),phiAtSPD2,zAtSPD2)) {
4492 if (TMath::Abs(zAtSPD2)<2.*AliITSRecoParam::GetSPDdetzlength()) return 2;
4493 }
4494 return 2; // always allow skipping, changed on 05.11.2009
4495 }
4496
4497 return 0;
4498}
4499//------------------------------------------------------------------------
4500Int_t AliITStrackerMI::CheckDeadZone(AliITStrackMI *track,
4501 Int_t ilayer,Int_t idet,
4502 Double_t dz,Double_t dy,
4503 Bool_t noClusters) const {
4504 //-----------------------------------------------------------------
4505 // This method is used to decide whether to allow a prolongation
4506 // without clusters, because there is a dead zone in the road.
4507 // In this case the return value is > 0:
4508 // return 1: dead zone at z=0,+-7cm in SPD
4509 // This method assumes that fSPDdetzcentre is ordered from -z to +z
4510 // return 2: all road is "bad" (dead or noisy) from the OCDB
4511 // return 3: at least a chip is "bad" (dead or noisy) from the OCDB
4512 // return 4: at least a single channel is "bad" (dead or noisy) from the OCDB
4513 //-----------------------------------------------------------------
4514
4515 // check dead zones at z=0,+-7cm in the SPD
4516 if (ilayer<2 && !AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
4517 Double_t zmindead[3]={fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
4518 fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
4519 fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength()};
4520 Double_t zmaxdead[3]={fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
4521 fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
4522 fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength()};
4523 for (Int_t i=0; i<3; i++)
4524 if (track->GetZ()-dz<zmaxdead[i] && track->GetZ()+dz>zmindead[i]) {
4525 AliDebug(2,Form("crack SPD %d track z %f %f %f %f\n",ilayer,track->GetZ(),dz,zmaxdead[i],zmindead[i]));
4526 if (GetSPDDeadZoneProbability(track->GetZ(),TMath::Sqrt(track->GetSigmaZ2()))>0.1) return 1;
4527 }
4528 }
4529
4530 // check bad zones from OCDB
4531 if (!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return 0;
4532
4533 if (idet<0) return 0;
4534
4535 AliITSdetector &det=fgLayers[ilayer].GetDetector(idet);
4536
4537 Int_t detType=-1;
4538 Float_t detSizeFactorX=0.0001,detSizeFactorZ=0.0001;
4539 if (ilayer==0 || ilayer==1) { // ---------- SPD
4540 detType = 0;
4541 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
4542 detType = 1;
4543 detSizeFactorX *= 2.;
4544 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
4545 detType = 2;
4546 }
4547 AliITSsegmentation *segm = (AliITSsegmentation*)fkDetTypeRec->GetSegmentationModel(detType);
4548 if (detType==2) segm->SetLayer(ilayer+1);
4549 Float_t detSizeX = detSizeFactorX*segm->Dx();
4550 Float_t detSizeZ = detSizeFactorZ*segm->Dz();
4551
4552 // check if the road overlaps with bad chips
4553 Float_t xloc,zloc;
4554 if(!(LocalModuleCoord(ilayer,idet,track,xloc,zloc)))return 0;
4555 Float_t zlocmin = zloc-dz;
4556 Float_t zlocmax = zloc+dz;
4557 Float_t xlocmin = xloc-dy;
4558 Float_t xlocmax = xloc+dy;
4559 Int_t chipsInRoad[100];
4560
4561 // check if road goes out of detector
4562 Bool_t touchNeighbourDet=kFALSE;
4563 if (TMath::Abs(xlocmin)>0.5*detSizeX) {xlocmin=-0.4999*detSizeX; touchNeighbourDet=kTRUE;}
4564 if (TMath::Abs(xlocmax)>0.5*detSizeX) {xlocmax=+0.4999*detSizeX; touchNeighbourDet=kTRUE;}
4565 if (TMath::Abs(zlocmin)>0.5*detSizeZ) {zlocmin=-0.4999*detSizeZ; touchNeighbourDet=kTRUE;}
4566 if (TMath::Abs(zlocmax)>0.5*detSizeZ) {zlocmax=+0.4999*detSizeZ; touchNeighbourDet=kTRUE;}
4567 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));
4568
4569 // check if this detector is bad
4570 if (det.IsBad()) {
4571 AliDebug(2,Form("lay %d bad detector %d",ilayer,idet));
4572 if(!touchNeighbourDet) {
4573 return 2; // all detectors in road are bad
4574 } else {
4575 return 3; // at least one is bad
4576 }
4577 }
4578
4579 Int_t nChipsInRoad = segm->GetChipsInLocalWindow(chipsInRoad,zlocmin,zlocmax,xlocmin,xlocmax);
4580 AliDebug(2,Form("lay %d nChipsInRoad %d",ilayer,nChipsInRoad));
4581 if (!nChipsInRoad) return 0;
4582
4583 Bool_t anyBad=kFALSE,anyGood=kFALSE;
4584 for (Int_t iCh=0; iCh<nChipsInRoad; iCh++) {
4585 if (chipsInRoad[iCh]<0 || chipsInRoad[iCh]>det.GetNChips()-1) continue;
4586 AliDebug(2,Form(" chip %d bad %d",chipsInRoad[iCh],(Int_t)det.IsChipBad(chipsInRoad[iCh])));
4587 if (det.IsChipBad(chipsInRoad[iCh])) {
4588 anyBad=kTRUE;
4589 } else {
4590 anyGood=kTRUE;
4591 }
4592 }
4593
4594 if (!anyGood) {
4595 if(!touchNeighbourDet) {
4596 AliDebug(2,"all bad in road");
4597 return 2; // all chips in road are bad
4598 } else {
4599 return 3; // at least a bad chip in road
4600 }
4601 }
4602
4603 if (anyBad) {
4604 AliDebug(2,"at least a bad in road");
4605 return 3; // at least a bad chip in road
4606 }
4607
4608
4609 if (!AliITSReconstructor::GetRecoParam()->GetUseSingleBadChannelsFromOCDB()
4610 || !noClusters) return 0;
4611
4612 // There are no clusters in road: check if there is at least
4613 // a bad SPD pixel or SDD anode or SSD strips on both sides
4614
4615 Int_t idetInITS=idet;
4616 for(Int_t l=0;l<ilayer;l++) idetInITS+=AliITSgeomTGeo::GetNLadders(l+1)*AliITSgeomTGeo::GetNDetectors(l+1);
4617
4618 if (fITSChannelStatus->AnyBadInRoad(idetInITS,zlocmin,zlocmax,xlocmin,xlocmax)) {
4619 AliDebug(2,Form("Bad channel in det %d of layer %d\n",idet,ilayer));
4620 return 4;
4621 }
4622 //if (fITSChannelStatus->FractionOfBadInRoad(idet,zlocmin,zlocmax,xlocmin,xlocmax) > AliITSReconstructor::GetRecoParam()->GetMinFractionOfBadInRoad()) return 3;
4623
4624 return 0;
4625}
4626//------------------------------------------------------------------------
4627Bool_t AliITStrackerMI::LocalModuleCoord(Int_t ilayer,Int_t idet,
4628 const AliITStrackMI *track,
4629 Float_t &xloc,Float_t &zloc) const {
4630 //-----------------------------------------------------------------
4631 // Gives position of track in local module ref. frame
4632 //-----------------------------------------------------------------
4633
4634 xloc=0.;
4635 zloc=0.;
4636
4637 if(idet<0) return kTRUE; // track out of z acceptance of layer
4638
4639 Int_t ndet=AliITSgeomTGeo::GetNDetectors(ilayer+1); // layers from 1 to 6
4640
4641 Int_t lad = Int_t(idet/ndet) + 1;
4642
4643 Int_t det = idet - (lad-1)*ndet + 1;
4644
4645 Double_t xyzGlob[3],xyzLoc[3];
4646
4647 AliITSdetector &detector = fgLayers[ilayer].GetDetector(idet);
4648 // take into account the misalignment: xyz at real detector plane
4649 if(!track->GetXYZAt(detector.GetRmisal(),GetBz(),xyzGlob)) return kFALSE;
4650
4651 if(!AliITSgeomTGeo::GlobalToLocal(ilayer+1,lad,det,xyzGlob,xyzLoc)) return kFALSE;
4652
4653 xloc = (Float_t)xyzLoc[0];
4654 zloc = (Float_t)xyzLoc[2];
4655
4656 return kTRUE;
4657}
4658//------------------------------------------------------------------------
4659//------------------------------------------------------------------------
4660Bool_t AliITStrackerMI::IsOKForPlaneEff(const AliITStrackMI* track, const Int_t *clusters, Int_t ilayer) const {
4661//
4662// Method to be optimized further:
4663// Aim: decide whether a track can be used for PlaneEff evaluation
4664// the decision is taken based on the track quality at the layer under study
4665// no information on the clusters on this layer has to be used
4666// The criterium is to reject tracks at boundaries between basic block (e.g. SPD chip)
4667// the cut is done on number of sigmas from the boundaries
4668//
4669// Input: Actual track, layer [0,5] under study
4670// Output: none
4671// Return: kTRUE if this is a good track
4672//
4673// it will apply a pre-selection to obtain good quality tracks.
4674// Here also you will have the possibility to put a control on the
4675// impact point of the track on the basic block, in order to exclude border regions
4676// this will be done by calling a proper method of the AliITSPlaneEff class.
4677//
4678// input: AliITStrackMI* track, ilayer= layer number [0,5]
4679// return: Bool_t -> kTRUE if usable track, kFALSE if not usable.
4680//
4681 Int_t index[AliITSgeomTGeo::kNLayers];
4682 Int_t k;
4683 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
4684 //
4685 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
4686 index[k]=clusters[k];
4687 }
4688
4689 if(!fPlaneEff)
4690 {AliWarning("IsOKForPlaneEff: null pointer to AliITSPlaneEff"); return kFALSE;}
4691 AliITSlayer &layer=fgLayers[ilayer];
4692 Double_t r=layer.GetR();
4693 AliITStrackMI tmp(*track);
4694
4695// require a minimal number of cluster in other layers and eventually clusters in closest layers
4696 Int_t ncl_out=0; Int_t ncl_in=0;
4697 for(Int_t lay=AliITSgeomTGeo::kNLayers-1;lay>ilayer;lay--) { // count n. of cluster in outermost layers
4698 AliDebug(2,Form("trak=%d lay=%d ; index=%d ESD label= %d",tmp.GetLabel(),lay,
4699 tmp.GetClIndex(lay),((AliESDtrack*)tmp.GetESDtrack())->GetLabel())) ;
4700 // if (tmp.GetClIndex(lay)>=0) ncl_out++;
4701if(index[lay]>=0)ncl_out++;
4702 }
4703 for(Int_t lay=ilayer-1; lay>=0;lay--) { // count n. of cluster in innermost layers
4704 AliDebug(2,Form("trak=%d lay=%d ; index=%d ESD label= %d",tmp.GetLabel(),lay,
4705 tmp.GetClIndex(lay),((AliESDtrack*)tmp.GetESDtrack())->GetLabel())) ;
4706 if (index[lay]>=0) ncl_in++;
4707 }
4708 Int_t ncl=ncl_out+ncl_in;
4709 Bool_t nextout = kFALSE;
4710 if(ilayer==AliITSgeomTGeo::kNLayers-1) nextout=kTRUE; // you are already on the outermost layer
4711 else nextout = ((tmp.GetClIndex(ilayer+1)>=0)? kTRUE : kFALSE );
4712 Bool_t nextin = kFALSE;
4713 if(ilayer==0) nextin=kTRUE; // you are already on the innermost layer
4714 else nextin = ((index[ilayer-1]>=0)? kTRUE : kFALSE );
4715 // maximum number of missing clusters allowed in outermost layers
4716 if(ncl_out<AliITSgeomTGeo::kNLayers-(ilayer+1)-AliITSReconstructor::GetRecoParam()->GetMaxMissingClustersOutPlaneEff())
4717 return kFALSE;
4718 // maximum number of missing clusters allowed (both in innermost and in outermost layers)
4719 if(ncl<AliITSgeomTGeo::kNLayers-1-AliITSReconstructor::GetRecoParam()->GetMaxMissingClustersPlaneEff())
4720 return kFALSE;
4721 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInOuterLayerPlaneEff() && !nextout) return kFALSE;
4722 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInInnerLayerPlaneEff() && !nextin) return kFALSE;
4723 if(tmp.Pt() < AliITSReconstructor::GetRecoParam()->GetMinPtPlaneEff()) return kFALSE;
4724 // if(AliITSReconstructor::GetRecoParam()->GetOnlyConstraintPlaneEff() && !tmp.GetConstrain()) return kFALSE;
4725
4726// detector number
4727 Double_t phi,z;
4728 if (!tmp.GetPhiZat(r,phi,z)) return kFALSE;
4729 Int_t idet=layer.FindDetectorIndex(phi,z);
4730 if(idet<0) { AliInfo(Form("cannot find detector"));
4731 return kFALSE;}
4732
4733 // here check if it has good Chi Square.
4734
4735 //propagate to the intersection with the detector plane
4736 const AliITSdetector &det=layer.GetDetector(idet);
4737 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return kFALSE;
4738
4739 Float_t locx; //
4740 Float_t locz; //
4741 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return kFALSE;
4742 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
4743 if(key>fPlaneEff->Nblock()) return kFALSE;
4744 Float_t blockXmn,blockXmx,blockZmn,blockZmx;
4745 if (!fPlaneEff->GetBlockBoundaries(key,blockXmn,blockXmx,blockZmn,blockZmx)) return kFALSE;
4746 //***************
4747 // DEFINITION OF SEARCH ROAD FOR accepting a track
4748 //
4749 Double_t nsigx=AliITSReconstructor::GetRecoParam()->GetNSigXFromBoundaryPlaneEff();
4750 Double_t nsigz=AliITSReconstructor::GetRecoParam()->GetNSigZFromBoundaryPlaneEff();
4751 Double_t dx=nsigx*TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
4752 Double_t dz=nsigz*TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
4753 // done for RecPoints
4754
4755 // exclude tracks at boundary between detectors
4756 //Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidthPlaneEff();
4757 Double_t boundaryWidth=0; // for the time being hard-wired, later on from AliITSRecoParam
4758 AliDebug(2,Form("Tracking: track impact x=%f, y=%f, z=%f",tmp.GetX(), tmp.GetY(), tmp.GetZ()));
4759 AliDebug(2,Form("Local: track impact x=%f, z=%f",locx,locz));
4760 AliDebug(2,Form("Search Road. Tracking: dy=%f , dz=%f",dx,dz));
4761 if ( (locx-dx < blockXmn+boundaryWidth) ||
4762 (locx+dx > blockXmx-boundaryWidth) ||
4763 (locz-dz < blockZmn+boundaryWidth) ||
4764 (locz+dz > blockZmx-boundaryWidth) ) return kFALSE;
4765 return kTRUE;
4766}
4767//------------------------------------------------------------------------
4768void AliITStrackerMI::UseTrackForPlaneEff(const AliITStrackMI* track, Int_t ilayer) {
4769//
4770// This Method has to be optimized! For the time-being it uses the same criteria
4771// as those used in the search of extra clusters for overlapping modules.
4772//
4773// Method Purpose: estabilish whether a track has produced a recpoint or not
4774// in the layer under study (For Plane efficiency)
4775//
4776// inputs: AliITStrackMI* track (pointer to a usable track)
4777// outputs: none
4778// side effects: update (by 1 count) the Plane Efficiency statistics of the basic block
4779// traversed by this very track. In details:
4780// - if a cluster can be associated to the track then call
4781// AliITSPlaneEff::UpDatePlaneEff(key,kTRUE);
4782// - if not, the AliITSPlaneEff::UpDatePlaneEff(key,kFALSE) is called
4783//
4784 if(!fPlaneEff)
4785 {AliWarning("UseTrackForPlaneEff: null pointer to AliITSPlaneEff"); return;}
4786 AliITSlayer &layer=fgLayers[ilayer];
4787 Double_t r=layer.GetR();
4788 AliITStrackMI tmp(*track);
4789
4790// detector number
4791 Double_t phi,z;
4792 if (!tmp.GetPhiZat(r,phi,z)) return;
4793 Int_t idet=layer.FindDetectorIndex(phi,z);
4794
4795 if(idet<0) { AliInfo(Form("cannot find detector"));
4796 return;}
4797
4798
4799//propagate to the intersection with the detector plane
4800 const AliITSdetector &det=layer.GetDetector(idet);
4801 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return;
4802
4803
4804//***************
4805// DEFINITION OF SEARCH ROAD FOR CLUSTERS SELECTION
4806//
4807 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
4808 TMath::Sqrt(tmp.GetSigmaZ2() +
4809 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4810 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4811 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
4812 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
4813 TMath::Sqrt(tmp.GetSigmaY2() +
4814 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4815 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4816 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
4817
4818// road in global (rphi,z) [i.e. in tracking ref. system]
4819 Double_t zmin = tmp.GetZ() - dz;
4820 Double_t zmax = tmp.GetZ() + dz;
4821 Double_t ymin = tmp.GetY() + r*det.GetPhi() - dy;
4822 Double_t ymax = tmp.GetY() + r*det.GetPhi() + dy;
4823
4824// select clusters in road
4825 layer.SelectClusters(zmin,zmax,ymin,ymax);
4826
4827// Define criteria for track-cluster association
4828 Double_t msz = tmp.GetSigmaZ2() +
4829 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4830 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4831 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
4832 Double_t msy = tmp.GetSigmaY2() +
4833 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4834 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4835 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
4836 if (tmp.GetConstrain()) {
4837 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
4838 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
4839 } else {
4840 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
4841 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
4842 }
4843 msz = 1./msz; // 1/RoadZ^2
4844 msy = 1./msy; // 1/RoadY^2
4845//
4846
4847 const AliITSRecPoint *cl=0; Int_t clidx=-1, ci=-1;
4848 Int_t idetc=-1;
4849 Double_t chi2trkcl=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
4850 //Double_t tolerance=0.2;
4851 /*while ((cl=layer.GetNextCluster(clidx))!=0) {
4852 idetc = cl->GetDetectorIndex();
4853 if(idet!=idetc) continue;
4854 //Int_t ilay = cl->GetLayer();
4855
4856 if (TMath::Abs(tmp.GetZ() - cl->GetZ()) > tolerance) continue;
4857 if (TMath::Abs(tmp.GetY() - cl->GetY()) > tolerance) continue;
4858
4859 Double_t chi2=tmp.GetPredictedChi2(cl);
4860 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; }
4861 }*/
4862 Float_t locx; //
4863 Float_t locz; //
4864 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return;
4865//
4866 AliDebug(2,Form("ilayer= %d, idet=%d, x= %f, z=%f",ilayer,idet,locx,locz));
4867 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
4868 if(key>fPlaneEff->Nblock()) return;
4869 Bool_t found=kFALSE;
4870 //if (ci>=0) {
4871 Double_t chi2;
4872 while ((cl=layer.GetNextCluster(clidx))!=0) {
4873 idetc = cl->GetDetectorIndex();
4874 if(idet!=idetc) continue;
4875 // here real control to see whether the cluster can be associated to the track.
4876 // cluster not associated to track
4877 if ( (tmp.GetZ()-cl->GetZ())*(tmp.GetZ()-cl->GetZ())*msz +
4878 (tmp.GetY()-cl->GetY())*(tmp.GetY()-cl->GetY())*msy > 1. ) continue;
4879 // calculate track-clusters chi2
4880 chi2 = GetPredictedChi2MI(&tmp,cl,ilayer); // note that this method change track tmp
4881 // in particular, the error associated to the cluster
4882 //Double_t chi2 = tmp.GetPredictedChi(cl); // this method does not change track tmp
4883 // chi2 cut
4884 if (chi2 > AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) continue;
4885 found=kTRUE;
4886 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; } // this just to trace which cluster is selected
4887 // track->SetExtraCluster(ilayer,(ilayer<<28)+ci);
4888 // track->SetExtraModule(ilayer,idetExtra);
4889 }
4890 if(!fPlaneEff->UpDatePlaneEff(found,key))
4891 AliWarning(Form("UseTrackForPlaneEff: cannot UpDate PlaneEff for key=%d",key));
4892 if(fPlaneEff->GetCreateHistos()&& AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) {
4893 Float_t tr[4]={99999.,99999.,9999.,9999.}; // initialize to high values
4894 Float_t clu[4]={-99999.,-99999.,9999.,9999.}; // (in some cases GetCov fails)
4895 Int_t cltype[2]={-999,-999};
4896 // and the module
4897
4898Float_t AngleModTrack[3]={99999.,99999.,99999.}; // angles (phi, z and "absolute angle") between the track and the mormal to the module (see below)
4899
4900 tr[0]=locx;
4901 tr[1]=locz;
4902 tr[2]=TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
4903 tr[3]=TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
4904
4905 if (found){
4906 clu[0]=layer.GetCluster(ci)->GetDetLocalX();
4907 clu[1]=layer.GetCluster(ci)->GetDetLocalZ();
4908 cltype[0]=layer.GetCluster(ci)->GetNy();
4909 cltype[1]=layer.GetCluster(ci)->GetNz();
4910
4911 // Without the following 6 lines you would retrieve the nominal error of a cluster (e.g. for the SPD:
4912 // X->50/sqrt(12)=14 micron Z->450/sqrt(12)= 120 micron)
4913 // Within AliTrackerMI/AliTrackMI the error on the cluster is associated to the AliITStrackMI (fSigmaY,Z)
4914 // It is computed properly by calling the method
4915 // AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
4916 // T
4917 //Double_t x=0.5*(tmp.GetX()+layer.GetCluster(ci)->GetX()); // Take into account the mis-alignment
4918 //if (tmp.PropagateTo(x,0.,0.)) {
4919 chi2=GetPredictedChi2MI(&tmp,layer.GetCluster(ci),ilayer);
4920 AliCluster c(*layer.GetCluster(ci));
4921 c.SetSigmaY2(tmp.GetSigmaY(ilayer)*tmp.GetSigmaY(ilayer));
4922 c.SetSigmaZ2(tmp.GetSigmaZ(ilayer)*tmp.GetSigmaZ(ilayer));
4923 //if (layer.GetCluster(ci)->GetGlobalCov(cov)) // by using this, instead, you got nominal cluster errors
4924 clu[2]=TMath::Sqrt(c.GetSigmaY2());
4925 clu[3]=TMath::Sqrt(c.GetSigmaZ2());
4926 //}
4927 }
4928 // Compute the angles between the track and the module
4929 // compute the angle "in phi direction", i.e. the angle in the transverse plane
4930 // between the normal to the module and the projection (in the transverse plane) of the
4931 // track trajectory
4932 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
4933 Float_t tgl = tmp.GetTgl();
4934 Float_t phitr = tmp.GetSnp();
4935 phitr = TMath::ASin(phitr);
4936 Int_t volId = AliGeomManager::LayerToVolUIDSafe(ilayer+1 ,idet );
4937
4938 Double_t tra[3]; AliGeomManager::GetOrigTranslation(volId,tra);
4939 Double_t rot[9]; AliGeomManager::GetOrigRotation(volId,rot);
4940 Double_t alpha =0.;
4941 alpha = tmp.GetAlpha();
4942 Double_t phiglob = alpha+phitr;
4943 Double_t p[3];
4944 p[0] = TMath::Cos(phiglob);
4945 p[1] = TMath::Sin(phiglob);
4946 p[2] = tgl;
4947 TVector3 pvec(p[0],p[1],p[2]);
4948 TVector3 normvec(rot[1],rot[4],rot[7]);
4949 Double_t angle = pvec.Angle(normvec);
4950
4951 if(angle>0.5*TMath::Pi()) angle = (TMath::Pi()-angle);
4952 angle *= 180./TMath::Pi();
4953
4954 //Trasverse Plane
4955 TVector3 pt(p[0],p[1],0);
4956 TVector3 normt(rot[1],rot[4],0);
4957 Double_t anglet = pt.Angle(normt);
4958
4959 Double_t phiPt = TMath::ATan2(p[1],p[0]);
4960 if(phiPt<0)phiPt+=2.*TMath::Pi();
4961 Double_t phiNorm = TMath::ATan2(rot[4],rot[1]);
4962 if(phiNorm<0) phiNorm+=2.*TMath::Pi();
4963 if(anglet>0.5*TMath::Pi()) anglet = (TMath::Pi()-anglet);
4964 if(phiNorm>phiPt) anglet*=-1.;// pt-->normt clockwise: anglet>0
4965 if((phiNorm-phiPt)>TMath::Pi()) anglet*=-1.;
4966 anglet *= 180./TMath::Pi();
4967
4968 AngleModTrack[2]=(Float_t) angle;
4969 AngleModTrack[0]=(Float_t) anglet;
4970 // now the "angle in z" (much easier, i.e. the angle between the z axis and the track momentum + 90)
4971 AngleModTrack[1]=TMath::ACos(tgl/TMath::Sqrt(tgl*tgl+1.));
4972 AngleModTrack[1]-=TMath::Pi()/2.; // range of angle is -pi/2 , pi/2
4973 AngleModTrack[1]*=180./TMath::Pi(); // in degree
4974
4975 fPlaneEff->FillHistos(key,found,tr,clu,cltype,AngleModTrack);
4976 }
4977return;
4978}
4979