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1/**************************************************************************
2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15/* $Id$ */
16
17//-------------------------------------------------------------------------
18// Implementation of the ITS tracker class
19// It reads AliITSRecPoint clusters and creates AliITStrackMI tracks
20// and fills with them the ESD
21// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
22// Current support and development:
23// Andrea Dainese, andrea.dainese@lnl.infn.it
24// dE/dx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
25// Params moved to AliITSRecoParam by: Andrea Dainese, INFN
26// Material budget from TGeo by: Ludovic Gaudichet & Andrea Dainese, INFN
27//-------------------------------------------------------------------------
28
29#include <TMatrixD.h>
30#include <TTree.h>
31#include <TDatabasePDG.h>
32#include <TString.h>
33#include <TRandom.h>
34#include <TTreeStream.h>
35
36#include "AliLog.h"
37#include "AliGeomManager.h"
38#include "AliITSPlaneEff.h"
39#include "AliTrackPointArray.h"
40#include "AliESDEvent.h"
41#include "AliESDtrack.h"
42#include "AliV0.h"
43#include "AliITSChannelStatus.h"
44#include "AliITSDetTypeRec.h"
45#include "AliITSRecPoint.h"
46#include "AliITSRecPointContainer.h"
47#include "AliITSgeomTGeo.h"
48#include "AliITSReconstructor.h"
49#include "AliITSClusterParam.h"
50#include "AliITSsegmentation.h"
51#include "AliITSCalibration.h"
52#include "AliITSPlaneEffSPD.h"
53#include "AliITSPlaneEffSDD.h"
54#include "AliITSPlaneEffSSD.h"
55#include "AliITSV0Finder.h"
56#include "AliITStrackerMI.h"
57#include "AliMathBase.h"
58
59ClassImp(AliITStrackerMI)
60
61AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[AliITSgeomTGeo::kNLayers]; // ITS layers
62
63AliITStrackerMI::AliITStrackerMI():AliTracker(),
64fI(0),
65fBestTrack(),
66fTrackToFollow(),
67fTrackHypothesys(),
68fBestHypothesys(),
69fOriginal(),
70fCurrentEsdTrack(),
71fPass(0),
72fAfterV0(kFALSE),
73fLastLayerToTrackTo(0),
74fCoefficients(0),
75fEsd(0),
76fTrackingPhase("Default"),
77fUseTGeo(3),
78fNtracks(0),
79fxOverX0Pipe(-1.),
80fxTimesRhoPipe(-1.),
81fxOverX0PipeTrks(0),
82fxTimesRhoPipeTrks(0),
83fxOverX0ShieldTrks(0),
84fxTimesRhoShieldTrks(0),
85fxOverX0LayerTrks(0),
86fxTimesRhoLayerTrks(0),
87fDebugStreamer(0),
88fITSChannelStatus(0),
89fkDetTypeRec(0),
90fPlaneEff(0) {
91 //Default constructor
92 Int_t i;
93 for(i=0;i<4;i++) fSPDdetzcentre[i]=0.;
94 for(i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
95 for(i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
96 fOriginal.SetOwner();
97}
98//------------------------------------------------------------------------
99AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
100fI(AliITSgeomTGeo::GetNLayers()),
101fBestTrack(),
102fTrackToFollow(),
103fTrackHypothesys(),
104fBestHypothesys(),
105fOriginal(),
106fCurrentEsdTrack(),
107fPass(0),
108fAfterV0(kFALSE),
109fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()),
110fCoefficients(0),
111fEsd(0),
112fTrackingPhase("Default"),
113fUseTGeo(3),
114fNtracks(0),
115fxOverX0Pipe(-1.),
116fxTimesRhoPipe(-1.),
117fxOverX0PipeTrks(0),
118fxTimesRhoPipeTrks(0),
119fxOverX0ShieldTrks(0),
120fxTimesRhoShieldTrks(0),
121fxOverX0LayerTrks(0),
122fxTimesRhoLayerTrks(0),
123fDebugStreamer(0),
124fITSChannelStatus(0),
125fkDetTypeRec(0),
126fPlaneEff(0) {
127 //--------------------------------------------------------------------
128 //This is the AliITStrackerMI constructor
129 //--------------------------------------------------------------------
130 if (geom) {
131 AliWarning("\"geom\" is actually a dummy argument !");
132 }
133
134 fOriginal.SetOwner();
135 fCoefficients = 0;
136 fAfterV0 = kFALSE;
137
138 for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
139 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
140 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
141
142 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
143 AliITSgeomTGeo::GetTranslation(i,1,1,xyz);
144 Double_t poff=TMath::ATan2(y,x);
145 Double_t zoff=z;
146
147 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
148 Double_t r=TMath::Sqrt(x*x + y*y);
149
150 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
151 r += TMath::Sqrt(x*x + y*y);
152 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
153 r += TMath::Sqrt(x*x + y*y);
154 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
155 r += TMath::Sqrt(x*x + y*y);
156 r*=0.25;
157
158 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
159
160 for (Int_t j=1; j<nlad+1; j++) {
161 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
162 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
163 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
164 m.Multiply(tm);
165 Double_t txyz[3]={0.};
166 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
167 m.LocalToMaster(txyz,xyz);
168 r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
169 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
170
171 if (phi<0) phi+=TMath::TwoPi();
172 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
173
174 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
175 new(&det) AliITSdetector(r,phi);
176 // compute the real radius (with misalignment)
177 TGeoHMatrix mmisal(*(AliITSgeomTGeo::GetMatrix(i,j,k)));
178 mmisal.Multiply(tm);
179 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
180 mmisal.LocalToMaster(txyz,xyz);
181 Double_t rmisal=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
182 det.SetRmisal(rmisal);
183
184 } // end loop on detectors
185 } // end loop on ladders
186 fForceSkippingOfLayer[i] = 0;
187 } // end loop on layers
188
189
190 fI=AliITSgeomTGeo::GetNLayers();
191
192 fPass=0;
193 fConstraint[0]=1; fConstraint[1]=0;
194
195 Double_t xyzVtx[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
196 AliITSReconstructor::GetRecoParam()->GetYVdef(),
197 AliITSReconstructor::GetRecoParam()->GetZVdef()};
198 Double_t ersVtx[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
199 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
200 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
201 SetVertex(xyzVtx,ersVtx);
202
203 fLastLayerToTrackTo=AliITSRecoParam::GetLastLayerToTrackTo();
204 for (Int_t i=0;i<100000;i++){
205 fBestTrackIndex[i]=0;
206 }
207
208 // store positions of centre of SPD modules (in z)
209 // The convetion is that fSPDdetzcentre is ordered from -z to +z
210 Double_t tr[3];
211 if (tr[2]<0) { // old geom (up to v5asymmPPR)
212 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
213 fSPDdetzcentre[0] = tr[2];
214 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
215 fSPDdetzcentre[1] = tr[2];
216 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
217 fSPDdetzcentre[2] = tr[2];
218 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
219 fSPDdetzcentre[3] = tr[2];
220 } else { // new geom (from v11Hybrid)
221 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
222 fSPDdetzcentre[0] = tr[2];
223 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
224 fSPDdetzcentre[1] = tr[2];
225 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
226 fSPDdetzcentre[2] = tr[2];
227 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
228 fSPDdetzcentre[3] = tr[2];
229 }
230
231 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
232 if(AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance() && fUseTGeo!=1 && fUseTGeo!=3) {
233 AliWarning("fUseTGeo changed to 3 because fExtendedEtaAcceptance is kTRUE");
234 fUseTGeo = 3;
235 }
236
237 for(Int_t i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
238 for(Int_t i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
239
240 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
241
242 // only for plane efficiency evaluation
243 if (AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
244 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0) {
245 Int_t iplane=AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff();
246 if(!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(iplane)==1)
247 AliWarning(Form("Evaluation of Plane Eff for layer %d will be attempted without removing it from tracker",iplane));
248 if (iplane<2) fPlaneEff = new AliITSPlaneEffSPD();
249 else if (iplane<4) fPlaneEff = new AliITSPlaneEffSDD();
250 else fPlaneEff = new AliITSPlaneEffSSD();
251 if(AliITSReconstructor::GetRecoParam()->GetReadPlaneEffFromOCDB())
252 if(!fPlaneEff->ReadFromCDB()) {AliWarning("AliITStrackerMI reading of AliITSPlaneEff from OCDB failed") ;}
253 if(AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) fPlaneEff->SetCreateHistos(kTRUE);
254 }
255}
256//------------------------------------------------------------------------
257AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
258fI(tracker.fI),
259fBestTrack(tracker.fBestTrack),
260fTrackToFollow(tracker.fTrackToFollow),
261fTrackHypothesys(tracker.fTrackHypothesys),
262fBestHypothesys(tracker.fBestHypothesys),
263fOriginal(tracker.fOriginal),
264fCurrentEsdTrack(tracker.fCurrentEsdTrack),
265fPass(tracker.fPass),
266fAfterV0(tracker.fAfterV0),
267fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
268fCoefficients(tracker.fCoefficients),
269fEsd(tracker.fEsd),
270fTrackingPhase(tracker.fTrackingPhase),
271fUseTGeo(tracker.fUseTGeo),
272fNtracks(tracker.fNtracks),
273fxOverX0Pipe(tracker.fxOverX0Pipe),
274fxTimesRhoPipe(tracker.fxTimesRhoPipe),
275fxOverX0PipeTrks(0),
276fxTimesRhoPipeTrks(0),
277fxOverX0ShieldTrks(0),
278fxTimesRhoShieldTrks(0),
279fxOverX0LayerTrks(0),
280fxTimesRhoLayerTrks(0),
281fDebugStreamer(tracker.fDebugStreamer),
282fITSChannelStatus(tracker.fITSChannelStatus),
283fkDetTypeRec(tracker.fkDetTypeRec),
284fPlaneEff(tracker.fPlaneEff) {
285 //Copy constructor
286 fOriginal.SetOwner();
287 Int_t i;
288 for(i=0;i<4;i++) {
289 fSPDdetzcentre[i]=tracker.fSPDdetzcentre[i];
290 }
291 for(i=0;i<6;i++) {
292 fxOverX0Layer[i]=tracker.fxOverX0Layer[i];
293 fxTimesRhoLayer[i]=tracker.fxTimesRhoLayer[i];
294 }
295 for(i=0;i<2;i++) {
296 fxOverX0Shield[i]=tracker.fxOverX0Shield[i];
297 fxTimesRhoShield[i]=tracker.fxTimesRhoShield[i];
298 }
299}
300//------------------------------------------------------------------------
301AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
302 //Assignment operator
303 this->~AliITStrackerMI();
304 new(this) AliITStrackerMI(tracker);
305 return *this;
306}
307//------------------------------------------------------------------------
308AliITStrackerMI::~AliITStrackerMI()
309{
310 //
311 //destructor
312 //
313 if (fCoefficients) delete [] fCoefficients;
314 DeleteTrksMaterialLUT();
315 if (fDebugStreamer) {
316 //fDebugStreamer->Close();
317 delete fDebugStreamer;
318 }
319 if(fITSChannelStatus) delete fITSChannelStatus;
320 if(fPlaneEff) delete fPlaneEff;
321}
322//------------------------------------------------------------------------
323void AliITStrackerMI::ReadBadFromDetTypeRec() {
324 //--------------------------------------------------------------------
325 //This function read ITS bad detectors, chips, channels from AliITSDetTypeRec
326 //i.e. from OCDB
327 //--------------------------------------------------------------------
328
329 if(!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return;
330
331 Info("ReadBadFromDetTypeRec","Reading info about bad ITS detectors and channels");
332
333 if(!fkDetTypeRec) Error("ReadBadFromDetTypeRec","AliITSDetTypeRec nof found!\n");
334
335 // ITS channels map
336 if(fITSChannelStatus) delete fITSChannelStatus;
337 fITSChannelStatus = new AliITSChannelStatus(fkDetTypeRec);
338
339 // ITS detectors and chips
340 Int_t i=0,j=0,k=0,ndet=0;
341 for (i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
342 Int_t nBadDetsPerLayer=0;
343 ndet=AliITSgeomTGeo::GetNDetectors(i);
344 for (j=1; j<AliITSgeomTGeo::GetNLadders(i)+1; j++) {
345 for (k=1; k<ndet+1; k++) {
346 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
347 det.ReadBadDetectorAndChips(i-1,(j-1)*ndet + k-1,fkDetTypeRec);
348 if(det.IsBad()) {nBadDetsPerLayer++;}
349 } // end loop on detectors
350 } // end loop on ladders
351 Info("ReadBadFromDetTypeRec",Form("Layer %d: %d bad out of %d",i-1,nBadDetsPerLayer,ndet*AliITSgeomTGeo::GetNLadders(i)));
352 } // end loop on layers
353
354 return;
355}
356//------------------------------------------------------------------------
357Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
358 //--------------------------------------------------------------------
359 //This function loads ITS clusters
360 //--------------------------------------------------------------------
361
362 TClonesArray *clusters = NULL;
363 AliITSRecPointContainer* rpcont=AliITSRecPointContainer::Instance();
364 clusters=rpcont->FetchClusters(0,cTree);
365 if(!(rpcont->IsSPDActive() || rpcont->IsSDDActive() || rpcont->IsSSDActive())){
366 AliError("ITS is not in a known running configuration: SPD, SDD and SSD are not active");
367 return 1;
368 }
369 Int_t i=0,j=0,ndet=0;
370 Int_t detector=0;
371 for (i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
372 ndet=fgLayers[i].GetNdetectors();
373 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
374 for (; j<jmax; j++) {
375 // if (!cTree->GetEvent(j)) continue;
376 clusters = rpcont->UncheckedGetClusters(j);
377 if(!clusters)continue;
378 Int_t ncl=clusters->GetEntriesFast();
379 SignDeltas(clusters,GetZ());
380
381 while (ncl--) {
382 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
383 detector=c->GetDetectorIndex();
384
385 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
386
387 Int_t retval = fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
388 if(retval) {
389 AliWarning(Form("Too many clusters on layer %d!",i));
390 break;
391 }
392 }
393
394 // add dead zone "virtual" cluster in SPD, if there is a cluster within
395 // zwindow cm from the dead zone
396 // This method assumes that fSPDdetzcentre is ordered from -z to +z
397 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
398 for (Float_t xdead = 0; xdead < AliITSRecoParam::GetSPDdetxlength(); xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
399 Int_t lab[4] = {0,0,0,detector};
400 Int_t info[3] = {0,0,i};
401 Float_t q = 0.; // this identifies virtual clusters
402 Float_t hit[5] = {xdead,
403 0.,
404 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
405 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
406 q};
407 Bool_t local = kTRUE;
408 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
409 hit[1] = fSPDdetzcentre[0]+0.5*AliITSRecoParam::GetSPDdetzlength();
410 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
411 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
412 hit[1] = fSPDdetzcentre[1]-0.5*AliITSRecoParam::GetSPDdetzlength();
413 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
414 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
415 hit[1] = fSPDdetzcentre[1]+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[2]-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[2]+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[3]-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 }
428 } // "virtual" clusters in SPD
429
430 }
431 //
432 fgLayers[i].ResetRoad(); //road defined by the cluster density
433 fgLayers[i].SortClusters();
434 }
435
436 // check whether we have to skip some layers
437 SetForceSkippingOfLayer();
438
439 return 0;
440}
441//------------------------------------------------------------------------
442void AliITStrackerMI::UnloadClusters() {
443 //--------------------------------------------------------------------
444 //This function unloads ITS clusters
445 //--------------------------------------------------------------------
446 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
447}
448//------------------------------------------------------------------------
449void AliITStrackerMI::FillClusterArray(TObjArray* array) const {
450 //--------------------------------------------------------------------
451 // Publishes all pointers to clusters known to the tracker into the
452 // passed object array.
453 // The ownership is not transfered - the caller is not expected to delete
454 // the clusters.
455 //--------------------------------------------------------------------
456
457 for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
458 for(Int_t icl=0; icl<fgLayers[i].GetNumberOfClusters(); icl++) {
459 AliCluster *cl = (AliCluster*)fgLayers[i].GetCluster(icl);
460 array->AddLast(cl);
461 }
462 }
463
464 return;
465}
466//------------------------------------------------------------------------
467Int_t AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
468 //--------------------------------------------------------------------
469 // Correction for the material between the TPC and the ITS
470 //--------------------------------------------------------------------
471 if (t->GetX() > AliITSRecoParam::Getriw()) { // inward direction
472 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw(),1)) return 0;// TPC inner wall
473 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
474 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
475 } else if (t->GetX() < AliITSRecoParam::Getrs()) { // outward direction
476 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
477 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
478 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw()+0.001,1)) return 0;// TPC inner wall
479 } else {
480 printf("CorrectForTPCtoITSDeadZoneMaterial: Track is already in the dead zone !\n");
481 return 0;
482 }
483
484 return 1;
485}
486//------------------------------------------------------------------------
487Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
488 //--------------------------------------------------------------------
489 // This functions reconstructs ITS tracks
490 // The clusters must be already loaded !
491 //--------------------------------------------------------------------
492
493 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
494
495 fTrackingPhase="Clusters2Tracks";
496
497 TObjArray itsTracks(15000);
498 fOriginal.Clear();
499 fEsd = event; // store pointer to the esd
500
501 // temporary (for cosmics)
502 if(event->GetVertex()) {
503 TString title = event->GetVertex()->GetTitle();
504 if(title.Contains("cosmics")) {
505 Double_t xyz[3]={GetX(),GetY(),GetZ()};
506 Double_t exyz[3]={0.1,0.1,0.1};
507 SetVertex(xyz,exyz);
508 }
509 }
510 // temporary
511 Int_t noesd = 0;
512 {/* Read ESD tracks */
513 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
514 Int_t nentr=event->GetNumberOfTracks();
515 noesd=nentr;
516 // Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
517 while (nentr--) {
518 AliESDtrack *esd=event->GetTrack(nentr);
519 // ---- for debugging:
520 //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); }
521
522 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
523 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
524 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
525 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
526 AliITStrackMI *t=0;
527 try {
528 t=new AliITStrackMI(*esd);
529 } catch (const Char_t *msg) {
530 //Warning("Clusters2Tracks",msg);
531 delete t;
532 continue;
533 }
534 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
535 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
536
537
538 // look at the ESD mass hypothesys !
539 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
540 // write expected q
541 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
542
543 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
544 //track - can be V0 according to TPC
545 } else {
546 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
547 delete t;
548 continue;
549 }
550 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
551 delete t;
552 continue;
553 }
554 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
555 delete t;
556 continue;
557 }
558 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
559 delete t;
560 continue;
561 }
562 }
563 t->SetReconstructed(kFALSE);
564 itsTracks.AddLast(t);
565 fOriginal.AddLast(t);
566 }
567 } /* End Read ESD tracks */
568
569 itsTracks.Sort();
570 fOriginal.Sort();
571 Int_t nentr=itsTracks.GetEntriesFast();
572 fTrackHypothesys.Expand(nentr);
573 fBestHypothesys.Expand(nentr);
574 MakeCoefficients(nentr);
575 if(fUseTGeo==3 || fUseTGeo==4) MakeTrksMaterialLUT(event->GetNumberOfTracks());
576 Int_t ntrk=0;
577 // THE TWO TRACKING PASSES
578 for (fPass=0; fPass<2; fPass++) {
579 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
580 for (fCurrentEsdTrack=0; fCurrentEsdTrack<nentr; fCurrentEsdTrack++) {
581 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(fCurrentEsdTrack);
582 if (t==0) continue; //this track has been already tracked
583 //cout<<"========== "<<fPass<<" "<<fCurrentEsdTrack<<" =========\n";
584 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
585 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
586 if (fConstraint[fPass]) {
587 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
588 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
589 }
590
591 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
592 AliDebug(2,Form("LABEL %d pass %d",tpcLabel,fPass));
593 fI = 6;
594 ResetTrackToFollow(*t);
595 ResetBestTrack();
596
597 FollowProlongationTree(t,fCurrentEsdTrack,fConstraint[fPass]);
598
599
600 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
601 //
602 AliITStrackMI *besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
603 if (!besttrack) continue;
604 besttrack->SetLabel(tpcLabel);
605 // besttrack->CookdEdx();
606 CookdEdx(besttrack);
607 besttrack->SetFakeRatio(1.);
608 CookLabel(besttrack,0.); //For comparison only
609 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
610
611 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
612
613 t->SetReconstructed(kTRUE);
614 ntrk++;
615 AliDebug(2,Form("TRACK! (label %d) ncls %d",besttrack->GetLabel(),besttrack->GetNumberOfClusters()));
616 }
617 GetBestHypothesysMIP(itsTracks);
618 } // end loop on the two tracking passes
619
620 if(event->GetNumberOfV0s()>0) AliITSV0Finder::UpdateTPCV0(event,this);
621 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::FindV02(event,this);
622 fAfterV0 = kTRUE;
623 //
624 itsTracks.Clear();
625 //
626 Int_t entries = fTrackHypothesys.GetEntriesFast();
627 for (Int_t ientry=0; ientry<entries; ientry++) {
628 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
629 if (array) array->Delete();
630 delete fTrackHypothesys.RemoveAt(ientry);
631 }
632
633 fTrackHypothesys.Delete();
634 entries = fBestHypothesys.GetEntriesFast();
635 for (Int_t ientry=0; ientry<entries; ientry++) {
636 TObjArray * array =(TObjArray*)fBestHypothesys.UncheckedAt(ientry);
637 if (array) array->Delete();
638 delete fBestHypothesys.RemoveAt(ientry);
639 }
640 fBestHypothesys.Delete();
641 fOriginal.Clear();
642 delete [] fCoefficients;
643 fCoefficients=0;
644 DeleteTrksMaterialLUT();
645
646 AliInfo(Form("Number of prolonged tracks: %d out of %d ESD tracks",ntrk,noesd));
647
648 fTrackingPhase="Default";
649
650 return 0;
651}
652//------------------------------------------------------------------------
653Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
654 //--------------------------------------------------------------------
655 // This functions propagates reconstructed ITS tracks back
656 // The clusters must be loaded !
657 //--------------------------------------------------------------------
658 fTrackingPhase="PropagateBack";
659 Int_t nentr=event->GetNumberOfTracks();
660 // Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
661
662 Int_t ntrk=0;
663 for (Int_t i=0; i<nentr; i++) {
664 AliESDtrack *esd=event->GetTrack(i);
665
666 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
667 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
668
669 AliITStrackMI *t=0;
670 try {
671 t=new AliITStrackMI(*esd);
672 } catch (const Char_t *msg) {
673 //Warning("PropagateBack",msg);
674 delete t;
675 continue;
676 }
677 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
678
679 ResetTrackToFollow(*t);
680
681 /*
682 // propagate to vertex [SR, GSI 17.02.2003]
683 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
684 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
685 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
686 fTrackToFollow.StartTimeIntegral();
687 // from vertex to outside pipe
688 CorrectForPipeMaterial(&fTrackToFollow,"outward");
689 }*/
690 // Start time integral and add distance from current position to vertex
691 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
692 fTrackToFollow.GetXYZ(xyzTrk);
693 Double_t dst2 = 0.;
694 for (Int_t icoord=0; icoord<3; icoord++) {
695 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
696 dst2 += di*di;
697 }
698 fTrackToFollow.StartTimeIntegral();
699 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
700
701 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
702 if (RefitAt(AliITSRecoParam::GetrInsideITSscreen(),&fTrackToFollow,t)) {
703 if (!CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)) {
704 delete t;
705 continue;
706 }
707 fTrackToFollow.SetLabel(t->GetLabel());
708 //fTrackToFollow.CookdEdx();
709 CookLabel(&fTrackToFollow,0.); //For comparison only
710 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
711 //UseClusters(&fTrackToFollow);
712 ntrk++;
713 }
714 delete t;
715 }
716
717 AliInfo(Form("Number of back propagated ITS tracks: %d out of %d ESD tracks",ntrk,nentr));
718
719 fTrackingPhase="Default";
720
721 return 0;
722}
723//------------------------------------------------------------------------
724Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
725 //--------------------------------------------------------------------
726 // This functions refits ITS tracks using the
727 // "inward propagated" TPC tracks
728 // The clusters must be loaded !
729 //--------------------------------------------------------------------
730 fTrackingPhase="RefitInward";
731
732 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::RefitV02(event,this);
733
734 Int_t nentr=event->GetNumberOfTracks();
735 // Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
736
737 Int_t ntrk=0;
738 for (Int_t i=0; i<nentr; i++) {
739 AliESDtrack *esd=event->GetTrack(i);
740
741 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
742 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
743 if (esd->GetStatus()&AliESDtrack::kTPCout)
744 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
745
746 AliITStrackMI *t=0;
747 try {
748 t=new AliITStrackMI(*esd);
749 } catch (const Char_t *msg) {
750 //Warning("RefitInward",msg);
751 delete t;
752 continue;
753 }
754 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
755 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
756 delete t;
757 continue;
758 }
759
760 ResetTrackToFollow(*t);
761 fTrackToFollow.ResetClusters();
762
763 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
764 fTrackToFollow.ResetCovariance(10.);
765
766 //Refitting...
767 Bool_t pe=(AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
768 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0);
769
770 AliDebug(2,Form("Refit LABEL %d %d",t->GetLabel(),t->GetNumberOfClusters()));
771 if (RefitAt(AliITSRecoParam::GetrInsideSPD1(),&fTrackToFollow,t,kTRUE,pe)) {
772 AliDebug(2," refit OK");
773 fTrackToFollow.SetLabel(t->GetLabel());
774 // fTrackToFollow.CookdEdx();
775 CookdEdx(&fTrackToFollow);
776
777 CookLabel(&fTrackToFollow,0.0); //For comparison only
778
779 //The beam pipe
780 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
781 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
782 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
783 //printf(" %d\n",esdTrack->GetITSModuleIndex(0));
784 //esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); //original line
785 Double_t r[3]={0.,0.,0.};
786 Double_t maxD=3.;
787 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
788 ntrk++;
789 }
790 }
791 delete t;
792 }
793
794 AliInfo(Form("Number of refitted tracks: %d out of %d ESD tracks",ntrk,nentr));
795
796 fTrackingPhase="Default";
797
798 return 0;
799}
800//------------------------------------------------------------------------
801AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
802 //--------------------------------------------------------------------
803 // Return pointer to a given cluster
804 //--------------------------------------------------------------------
805 Int_t l=(index & 0xf0000000) >> 28;
806 Int_t c=(index & 0x0fffffff) >> 00;
807 return fgLayers[l].GetCluster(c);
808}
809//------------------------------------------------------------------------
810Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
811 //--------------------------------------------------------------------
812 // Get track space point with index i
813 //--------------------------------------------------------------------
814
815 Int_t l=(index & 0xf0000000) >> 28;
816 Int_t c=(index & 0x0fffffff) >> 00;
817 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
818 Int_t idet = cl->GetDetectorIndex();
819
820 Float_t xyz[3];
821 Float_t cov[6];
822 cl->GetGlobalXYZ(xyz);
823 cl->GetGlobalCov(cov);
824 p.SetXYZ(xyz, cov);
825 p.SetCharge(cl->GetQ());
826 p.SetDriftTime(cl->GetDriftTime());
827 p.SetChargeRatio(cl->GetChargeRatio());
828 p.SetClusterType(cl->GetClusterType());
829 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
830 switch (l) {
831 case 0:
832 iLayer = AliGeomManager::kSPD1;
833 break;
834 case 1:
835 iLayer = AliGeomManager::kSPD2;
836 break;
837 case 2:
838 iLayer = AliGeomManager::kSDD1;
839 break;
840 case 3:
841 iLayer = AliGeomManager::kSDD2;
842 break;
843 case 4:
844 iLayer = AliGeomManager::kSSD1;
845 break;
846 case 5:
847 iLayer = AliGeomManager::kSSD2;
848 break;
849 default:
850 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
851 break;
852 };
853 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
854 p.SetVolumeID((UShort_t)volid);
855 return kTRUE;
856}
857//------------------------------------------------------------------------
858Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
859 AliTrackPoint& p, const AliESDtrack *t) {
860 //--------------------------------------------------------------------
861 // Get track space point with index i
862 // (assign error estimated during the tracking)
863 //--------------------------------------------------------------------
864
865 Int_t l=(index & 0xf0000000) >> 28;
866 Int_t c=(index & 0x0fffffff) >> 00;
867 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
868 Int_t idet = cl->GetDetectorIndex();
869
870 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
871
872 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
873 Float_t detxy[2];
874 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
875 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
876 Double_t alpha = t->GetAlpha();
877 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
878 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe,GetBz()));
879 phi += alpha-det.GetPhi();
880 Float_t tgphi = TMath::Tan(phi);
881
882 Float_t tgl = t->GetTgl(); // tgl about const along track
883 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
884
885 Float_t errtrky,errtrkz,covyz;
886 Bool_t addMisalErr=kFALSE;
887 AliITSClusterParam::GetError(l,cl,tgl,tgphi,expQ,errtrky,errtrkz,covyz,addMisalErr);
888
889 Float_t xyz[3];
890 Float_t cov[6];
891 cl->GetGlobalXYZ(xyz);
892 // cl->GetGlobalCov(cov);
893 Float_t pos[3] = {0.,0.,0.};
894 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errtrky*errtrky,errtrkz*errtrkz,covyz);
895 tmpcl.GetGlobalCov(cov);
896
897 p.SetXYZ(xyz, cov);
898 p.SetCharge(cl->GetQ());
899 p.SetDriftTime(cl->GetDriftTime());
900 p.SetChargeRatio(cl->GetChargeRatio());
901 p.SetClusterType(cl->GetClusterType());
902
903 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
904 switch (l) {
905 case 0:
906 iLayer = AliGeomManager::kSPD1;
907 break;
908 case 1:
909 iLayer = AliGeomManager::kSPD2;
910 break;
911 case 2:
912 iLayer = AliGeomManager::kSDD1;
913 break;
914 case 3:
915 iLayer = AliGeomManager::kSDD2;
916 break;
917 case 4:
918 iLayer = AliGeomManager::kSSD1;
919 break;
920 case 5:
921 iLayer = AliGeomManager::kSSD2;
922 break;
923 default:
924 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
925 break;
926 };
927 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
928
929 p.SetVolumeID((UShort_t)volid);
930 return kTRUE;
931}
932//------------------------------------------------------------------------
933void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
934{
935 //--------------------------------------------------------------------
936 // Follow prolongation tree
937 //--------------------------------------------------------------------
938 //
939 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
940 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
941
942
943 AliESDtrack * esd = otrack->GetESDtrack();
944 if (esd->GetV0Index(0)>0) {
945 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
946 // mapping of ESD track is different as ITS track in Containers
947 // Need something more stable
948 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
949 for (Int_t i=0;i<3;i++){
950 Int_t index = esd->GetV0Index(i);
951 if (index==0) break;
952 AliESDv0 * vertex = fEsd->GetV0(index);
953 if (vertex->GetStatus()<0) continue; // rejected V0
954 //
955 if (esd->GetSign()>0) {
956 vertex->SetIndex(0,esdindex);
957 } else {
958 vertex->SetIndex(1,esdindex);
959 }
960 }
961 }
962 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
963 if (!bestarray){
964 bestarray = new TObjArray(5);
965 bestarray->SetOwner();
966 fBestHypothesys.AddAt(bestarray,esdindex);
967 }
968
969 //
970 //setup tree of the prolongations
971 //
972 static AliITStrackMI tracks[7][100];
973 AliITStrackMI *currenttrack;
974 static AliITStrackMI currenttrack1;
975 static AliITStrackMI currenttrack2;
976 static AliITStrackMI backuptrack;
977 Int_t ntracks[7];
978 Int_t nindexes[7][100];
979 Float_t normalizedchi2[100];
980 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
981 otrack->SetNSkipped(0);
982 new (&(tracks[6][0])) AliITStrackMI(*otrack);
983 ntracks[6]=1;
984 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
985 Int_t modstatus = 1; // found
986 Float_t xloc,zloc;
987 //
988 //
989 // follow prolongations
990 for (Int_t ilayer=5; ilayer>=0; ilayer--) {
991 AliDebug(2,Form("FollowProlongationTree: layer %d",ilayer));
992 fI = ilayer;
993 //
994 AliITSlayer &layer=fgLayers[ilayer];
995 Double_t r = layer.GetR();
996 ntracks[ilayer]=0;
997 //
998 //
999 Int_t nskipped=0;
1000 Float_t nused =0;
1001 for (Int_t itrack =0; itrack<ntracks[ilayer+1]; itrack++) {
1002 //set current track
1003 if (ntracks[ilayer]>=100) break;
1004 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
1005 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
1006 if (ntracks[ilayer]>15+ilayer){
1007 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
1008 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
1009 }
1010
1011 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
1012
1013 // material between SSD and SDD, SDD and SPD
1014 if (ilayer==3)
1015 if(!CorrectForShieldMaterial(&currenttrack1,"SDD","inward")) continue;
1016 if (ilayer==1)
1017 if(!CorrectForShieldMaterial(&currenttrack1,"SPD","inward")) continue;
1018
1019 // detector number
1020 Double_t phi,z;
1021 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
1022 Int_t idet=layer.FindDetectorIndex(phi,z);
1023
1024 Double_t trackGlobXYZ1[3];
1025 if (!currenttrack1.GetXYZ(trackGlobXYZ1)) continue;
1026
1027 // Get the budget to the primary vertex for the current track being prolonged
1028 Double_t budgetToPrimVertex = GetEffectiveThickness();
1029
1030 // check if we allow a prolongation without point
1031 Int_t skip = CheckSkipLayer(&currenttrack1,ilayer,idet);
1032 if (skip) {
1033 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1034 // propagate to the layer radius
1035 Double_t xToGo; if (!vtrack->GetLocalXat(r,xToGo)) continue;
1036 if(!vtrack->Propagate(xToGo)) continue;
1037 // apply correction for material of the current layer
1038 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1039 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
1040 vtrack->SetDeadZoneProbability(ilayer,1.); // no penalty for missing cluster
1041 vtrack->SetClIndex(ilayer,-1);
1042 modstatus = (skip==1 ? 3 : 4); // skipped : out in z
1043 if(LocalModuleCoord(ilayer,idet,vtrack,xloc,zloc)) { // local module coords
1044 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1045 }
1046 if(constrain) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1047 ntracks[ilayer]++;
1048 continue;
1049 }
1050
1051 // track outside layer acceptance in z
1052 if (idet<0) continue;
1053
1054 //propagate to the intersection with the detector plane
1055 const AliITSdetector &det=layer.GetDetector(idet);
1056 new(&currenttrack2) AliITStrackMI(currenttrack1);
1057 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
1058 if (!currenttrack2.Propagate(det.GetPhi(),det.GetR())) continue;
1059 currenttrack1.SetDetectorIndex(idet);
1060 currenttrack2.SetDetectorIndex(idet);
1061 if(!LocalModuleCoord(ilayer,idet,&currenttrack1,xloc,zloc)) continue; // local module coords
1062
1063 //***************
1064 // DEFINITION OF SEARCH ROAD AND CLUSTERS SELECTION
1065 //
1066 // road in global (rphi,z) [i.e. in tracking ref. system]
1067 Double_t zmin,zmax,ymin,ymax;
1068 if (!ComputeRoad(&currenttrack1,ilayer,idet,zmin,zmax,ymin,ymax)) continue;
1069
1070 // select clusters in road
1071 layer.SelectClusters(zmin,zmax,ymin,ymax);
1072 //********************
1073
1074 // Define criteria for track-cluster association
1075 Double_t msz = currenttrack1.GetSigmaZ2() +
1076 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1077 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1078 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
1079 Double_t msy = currenttrack1.GetSigmaY2() +
1080 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1081 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1082 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
1083 if (constrain) {
1084 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
1085 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
1086 } else {
1087 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
1088 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
1089 }
1090 msz = 1./msz; // 1/RoadZ^2
1091 msy = 1./msy; // 1/RoadY^2
1092
1093 //
1094 //
1095 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
1096 //
1097 const AliITSRecPoint *cl=0;
1098 Int_t clidx=-1;
1099 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
1100 Bool_t deadzoneSPD=kFALSE;
1101 currenttrack = &currenttrack1;
1102
1103 // check if the road contains a dead zone
1104 Bool_t noClusters = kFALSE;
1105 if (!layer.GetNextCluster(clidx,kTRUE)) noClusters=kTRUE;
1106 if (noClusters) AliDebug(2,"no clusters in road");
1107 Double_t dz=0.5*(zmax-zmin);
1108 Double_t dy=0.5*(ymax-ymin);
1109 Int_t dead = CheckDeadZone(&currenttrack1,ilayer,idet,dz,dy,noClusters);
1110 if(dead) AliDebug(2,Form("DEAD (%d)\n",dead));
1111 // create a prolongation without clusters (check also if there are no clusters in the road)
1112 if (dead ||
1113 (noClusters &&
1114 AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad())) {
1115 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1116 updatetrack->SetClIndex(ilayer,-1);
1117 if (dead==0) {
1118 modstatus = 5; // no cls in road
1119 } else if (dead==1) {
1120 modstatus = 7; // holes in z in SPD
1121 } else if (dead==2 || dead==3 || dead==4) {
1122 modstatus = 2; // dead from OCDB
1123 }
1124 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1125 // apply correction for material of the current layer
1126 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1127 if (constrain) { // apply vertex constrain
1128 updatetrack->SetConstrain(constrain);
1129 Bool_t isPrim = kTRUE;
1130 if (ilayer<4) { // check that it's close to the vertex
1131 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1132 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1133 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1134 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1135 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1136 }
1137 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1138 }
1139 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1140 if (dead) {
1141 if (dead==1) { // dead zone at z=0,+-7cm in SPD
1142 updatetrack->SetDeadZoneProbability(ilayer,GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1143 deadzoneSPD=kTRUE;
1144 } else if (dead==2 || dead==3) { // dead module or chip from OCDB
1145 updatetrack->SetDeadZoneProbability(ilayer,1.);
1146 } else if (dead==4) { // at least a single dead channel from OCDB
1147 updatetrack->SetDeadZoneProbability(ilayer,0.);
1148 }
1149 }
1150 ntracks[ilayer]++;
1151 }
1152
1153 clidx=-1;
1154 // loop over clusters in the road
1155 while ((cl=layer.GetNextCluster(clidx))!=0) {
1156 if (ntracks[ilayer]>95) break; //space for skipped clusters
1157 Bool_t changedet =kFALSE;
1158 if (TMath::Abs(cl->GetQ())<1.e-13 && deadzoneSPD==kTRUE) continue;
1159 Int_t idetc=cl->GetDetectorIndex();
1160
1161 if (currenttrack->GetDetectorIndex()==idetc) { // track already on the cluster's detector
1162 // take into account misalignment (bring track to real detector plane)
1163 Double_t xTrOrig = currenttrack->GetX();
1164 if (!currenttrack->Propagate(xTrOrig+cl->GetX())) continue;
1165 // a first cut on track-cluster distance
1166 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
1167 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
1168 { // cluster not associated to track
1169 AliDebug(2,"not associated");
1170 continue;
1171 }
1172 // bring track back to ideal detector plane
1173 if (!currenttrack->Propagate(xTrOrig)) continue;
1174 } else { // have to move track to cluster's detector
1175 const AliITSdetector &detc=layer.GetDetector(idetc);
1176 // a first cut on track-cluster distance
1177 Double_t y;
1178 if (!currenttrack2.GetProlongationFast(detc.GetPhi(),detc.GetR()+cl->GetX(),y,z)) continue;
1179 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
1180 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
1181 continue; // cluster not associated to track
1182 //
1183 new (&backuptrack) AliITStrackMI(currenttrack2);
1184 changedet = kTRUE;
1185 currenttrack =&currenttrack2;
1186 if (!currenttrack->Propagate(detc.GetPhi(),detc.GetR())) {
1187 new (currenttrack) AliITStrackMI(backuptrack);
1188 changedet = kFALSE;
1189 continue;
1190 }
1191 currenttrack->SetDetectorIndex(idetc);
1192 // Get again the budget to the primary vertex
1193 // for the current track being prolonged, if had to change detector
1194 //budgetToPrimVertex = GetEffectiveThickness();// not needed at the moment because anyway we take a mean material for this correction
1195 }
1196
1197 // calculate track-clusters chi2
1198 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
1199 // chi2 cut
1200 AliDebug(2,Form("chi2 %f max %f",chi2trkcl,AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)));
1201 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
1202 if (TMath::Abs(cl->GetQ())<1.e-13) deadzoneSPD=kTRUE; // only 1 prolongation with virtual cluster
1203 if (ntracks[ilayer]>=100) continue;
1204 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1205 updatetrack->SetClIndex(ilayer,-1);
1206 if (changedet) new (&currenttrack2) AliITStrackMI(backuptrack);
1207
1208 if (TMath::Abs(cl->GetQ())>1.e-13) { // real cluster
1209 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) {
1210 AliDebug(2,"update failed");
1211 continue;
1212 }
1213 updatetrack->SetSampledEdx(cl->GetQ(),ilayer-2);
1214 modstatus = 1; // found
1215 } else { // virtual cluster in dead zone
1216 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1217 updatetrack->SetDeadZoneProbability(ilayer,GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1218 modstatus = 7; // holes in z in SPD
1219 }
1220
1221 if (changedet) {
1222 Float_t xlocnewdet,zlocnewdet;
1223 if(LocalModuleCoord(ilayer,idet,updatetrack,xlocnewdet,zlocnewdet)) { // local module coords
1224 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xlocnewdet,zlocnewdet);
1225 }
1226 } else {
1227 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1228 }
1229 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1230
1231 // apply correction for material of the current layer
1232 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1233
1234 if (constrain) { // apply vertex constrain
1235 updatetrack->SetConstrain(constrain);
1236 Bool_t isPrim = kTRUE;
1237 if (ilayer<4) { // check that it's close to the vertex
1238 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1239 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1240 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1241 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1242 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1243 }
1244 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1245 } //apply vertex constrain
1246 ntracks[ilayer]++;
1247 } // create new hypothesis
1248 else {
1249 AliDebug(2,"chi2 too large");
1250 }
1251
1252 } // loop over possible prolongations
1253
1254 // allow one prolongation without clusters
1255 if (constrain && itrack<=1 && TMath::Abs(currenttrack1.GetNSkipped())<1.e-13 && deadzoneSPD==kFALSE && ntracks[ilayer]<100) {
1256 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
1257 // apply correction for material of the current layer
1258 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1259 vtrack->SetClIndex(ilayer,-1);
1260 modstatus = 3; // skipped
1261 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1262 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1263 vtrack->IncrementNSkipped();
1264 ntracks[ilayer]++;
1265 }
1266
1267
1268 } // loop over tracks in layer ilayer+1
1269
1270 //loop over track candidates for the current layer
1271 //
1272 //
1273 Int_t accepted=0;
1274
1275 Int_t golden=0;
1276 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1277 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
1278 if (normalizedchi2[itrack] <
1279 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
1280 if (ilayer>4) {
1281 accepted++;
1282 } else {
1283 if (constrain) { // constrain
1284 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1285 accepted++;
1286 } else { // !constrain
1287 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1288 accepted++;
1289 }
1290 }
1291 }
1292 // sort tracks by increasing normalized chi2
1293 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
1294 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
1295 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
1296 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
1297 } // end loop over layers
1298
1299
1300 //
1301 // Now select tracks to be kept
1302 //
1303 Int_t max = constrain ? 20 : 5;
1304
1305 // tracks that reach layer 0 (SPD inner)
1306 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
1307 AliITStrackMI & track= tracks[0][nindexes[0][i]];
1308 if (track.GetNumberOfClusters()<2) continue;
1309 if (!constrain && track.GetNormChi2(0) >
1310 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) {
1311 continue;
1312 }
1313 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1314 }
1315
1316 // tracks that reach layer 1 (SPD outer)
1317 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
1318 AliITStrackMI & track= tracks[1][nindexes[1][i]];
1319 if (track.GetNumberOfClusters()<4) continue;
1320 if (!constrain && track.GetNormChi2(1) >
1321 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1322 if (constrain) track.IncrementNSkipped();
1323 if (!constrain) {
1324 track.SetD(0,track.GetD(GetX(),GetY()));
1325 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
1326 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1327 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1328 }
1329 }
1330 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1331 }
1332
1333 // tracks that reach layer 2 (SDD inner), only during non-constrained pass
1334 if (!constrain){
1335 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
1336 AliITStrackMI & track= tracks[2][nindexes[2][i]];
1337 if (track.GetNumberOfClusters()<3) continue;
1338 if (!constrain && track.GetNormChi2(2) >
1339 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
1340 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
1341 if (!constrain){
1342 track.SetD(0,track.GetD(GetX(),GetY()));
1343 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
1344 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1345 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
1346 }
1347 }
1348 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1349 }
1350 }
1351
1352 if (!constrain) {
1353 //
1354 // register best track of each layer - important for V0 finder
1355 //
1356 for (Int_t ilayer=0;ilayer<5;ilayer++){
1357 if (ntracks[ilayer]==0) continue;
1358 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1359 if (track.GetNumberOfClusters()<1) continue;
1360 CookLabel(&track,0);
1361 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1362 }
1363 }
1364 //
1365 // update TPC V0 information
1366 //
1367 if (otrack->GetESDtrack()->GetV0Index(0)>0){
1368 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1369 for (Int_t i=0;i<3;i++){
1370 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
1371 if (index==0) break;
1372 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
1373 if (vertex->GetStatus()<0) continue; // rejected V0
1374 //
1375 if (otrack->GetSign()>0) {
1376 vertex->SetIndex(0,esdindex);
1377 }
1378 else{
1379 vertex->SetIndex(1,esdindex);
1380 }
1381 //find nearest layer with track info
1382 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1383 Int_t nearestold = GetNearestLayer(xrp); //I.B.
1384 Int_t nearest = nearestold;
1385 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1386 if (ntracks[nearest]==0){
1387 nearest = ilayer;
1388 }
1389 }
1390 //
1391 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1392 if (nearestold<5&&nearest<5){
1393 Bool_t accept = track.GetNormChi2(nearest)<10;
1394 if (accept){
1395 if (track.GetSign()>0) {
1396 vertex->SetParamP(track);
1397 vertex->Update(fprimvertex);
1398 //vertex->SetIndex(0,track.fESDtrack->GetID());
1399 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1400 }else{
1401 vertex->SetParamN(track);
1402 vertex->Update(fprimvertex);
1403 //vertex->SetIndex(1,track.fESDtrack->GetID());
1404 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1405 }
1406 vertex->SetStatus(vertex->GetStatus()+1);
1407 }else{
1408 //vertex->SetStatus(-2); // reject V0 - not enough clusters
1409 }
1410 }
1411 }
1412 }
1413
1414}
1415//------------------------------------------------------------------------
1416AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1417{
1418 //--------------------------------------------------------------------
1419 //
1420 //
1421 return fgLayers[layer];
1422}
1423//------------------------------------------------------------------------
1424AliITStrackerMI::AliITSlayer::AliITSlayer():
1425fR(0),
1426fPhiOffset(0),
1427fNladders(0),
1428fZOffset(0),
1429fNdetectors(0),
1430fDetectors(0),
1431fN(0),
1432fDy5(0),
1433fDy10(0),
1434fDy20(0),
1435fClustersCs(0),
1436fClusterIndexCs(0),
1437fYcs(0),
1438fZcs(0),
1439fNcs(0),
1440fCurrentSlice(-1),
1441fZmin(0),
1442fZmax(0),
1443fYmin(0),
1444fYmax(0),
1445fI(0),
1446fImax(0),
1447fSkip(0),
1448fAccepted(0),
1449fRoad(0),
1450fMaxSigmaClY(0),
1451fMaxSigmaClZ(0),
1452fNMaxSigmaCl(3)
1453{
1454 //--------------------------------------------------------------------
1455 //default AliITSlayer constructor
1456 //--------------------------------------------------------------------
1457 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1458 fClusterWeight[i]=0;
1459 fClusterTracks[0][i]=-1;
1460 fClusterTracks[1][i]=-1;
1461 fClusterTracks[2][i]=-1;
1462 fClusterTracks[3][i]=-1;
1463 }
1464}
1465//------------------------------------------------------------------------
1466AliITStrackerMI::AliITSlayer::
1467AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1468fR(r),
1469fPhiOffset(p),
1470fNladders(nl),
1471fZOffset(z),
1472fNdetectors(nd),
1473fDetectors(0),
1474fN(0),
1475fDy5(0),
1476fDy10(0),
1477fDy20(0),
1478fClustersCs(0),
1479fClusterIndexCs(0),
1480fYcs(0),
1481fZcs(0),
1482fNcs(0),
1483fCurrentSlice(-1),
1484fZmin(0),
1485fZmax(0),
1486fYmin(0),
1487fYmax(0),
1488fI(0),
1489fImax(0),
1490fSkip(0),
1491fAccepted(0),
1492fRoad(0),
1493fMaxSigmaClY(0),
1494fMaxSigmaClZ(0),
1495fNMaxSigmaCl(3) {
1496 //--------------------------------------------------------------------
1497 //main AliITSlayer constructor
1498 //--------------------------------------------------------------------
1499 fDetectors=new AliITSdetector[fNladders*fNdetectors];
1500 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
1501}
1502//------------------------------------------------------------------------
1503AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1504fR(layer.fR),
1505fPhiOffset(layer.fPhiOffset),
1506fNladders(layer.fNladders),
1507fZOffset(layer.fZOffset),
1508fNdetectors(layer.fNdetectors),
1509fDetectors(layer.fDetectors),
1510fN(layer.fN),
1511fDy5(layer.fDy5),
1512fDy10(layer.fDy10),
1513fDy20(layer.fDy20),
1514fClustersCs(layer.fClustersCs),
1515fClusterIndexCs(layer.fClusterIndexCs),
1516fYcs(layer.fYcs),
1517fZcs(layer.fZcs),
1518fNcs(layer.fNcs),
1519fCurrentSlice(layer.fCurrentSlice),
1520fZmin(layer.fZmin),
1521fZmax(layer.fZmax),
1522fYmin(layer.fYmin),
1523fYmax(layer.fYmax),
1524fI(layer.fI),
1525fImax(layer.fImax),
1526fSkip(layer.fSkip),
1527fAccepted(layer.fAccepted),
1528fRoad(layer.fRoad),
1529fMaxSigmaClY(layer.fMaxSigmaClY),
1530fMaxSigmaClZ(layer.fMaxSigmaClZ),
1531fNMaxSigmaCl(layer.fNMaxSigmaCl)
1532{
1533 //Copy constructor
1534}
1535//------------------------------------------------------------------------
1536AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1537 //--------------------------------------------------------------------
1538 // AliITSlayer destructor
1539 //--------------------------------------------------------------------
1540 delete [] fDetectors;
1541 for (Int_t i=0; i<fN; i++) delete fClusters[i];
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 }
1549}
1550//------------------------------------------------------------------------
1551void AliITStrackerMI::AliITSlayer::ResetClusters() {
1552 //--------------------------------------------------------------------
1553 // This function removes loaded clusters
1554 //--------------------------------------------------------------------
1555 for (Int_t i=0; i<fN; i++) delete fClusters[i];
1556 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++){
1557 fClusterWeight[i]=0;
1558 fClusterTracks[0][i]=-1;
1559 fClusterTracks[1][i]=-1;
1560 fClusterTracks[2][i]=-1;
1561 fClusterTracks[3][i]=-1;
1562 }
1563
1564 fN=0;
1565 fI=0;
1566}
1567//------------------------------------------------------------------------
1568void AliITStrackerMI::AliITSlayer::ResetWeights() {
1569 //--------------------------------------------------------------------
1570 // This function reset weights of the clusters
1571 //--------------------------------------------------------------------
1572 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
1573 fClusterWeight[i]=0;
1574 fClusterTracks[0][i]=-1;
1575 fClusterTracks[1][i]=-1;
1576 fClusterTracks[2][i]=-1;
1577 fClusterTracks[3][i]=-1;
1578 }
1579 for (Int_t i=0; i<fN;i++) {
1580 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
1581 if (cl&&cl->IsUsed()) cl->Use();
1582 }
1583
1584}
1585//------------------------------------------------------------------------
1586void AliITStrackerMI::AliITSlayer::ResetRoad() {
1587 //--------------------------------------------------------------------
1588 // This function calculates the road defined by the cluster density
1589 //--------------------------------------------------------------------
1590 Int_t n=0;
1591 for (Int_t i=0; i<fN; i++) {
1592 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1593 }
1594 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
1595}
1596//------------------------------------------------------------------------
1597Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
1598 //--------------------------------------------------------------------
1599 //This function adds a cluster to this layer
1600 //--------------------------------------------------------------------
1601 if (fN==AliITSRecoParam::GetMaxClusterPerLayer()) {
1602 return 1;
1603 }
1604 fCurrentSlice=-1;
1605 fClusters[fN]=cl;
1606 fN++;
1607 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
1608 //AD
1609 Double_t nSigmaY=fNMaxSigmaCl*TMath::Sqrt(cl->GetSigmaY2());
1610 Double_t nSigmaZ=fNMaxSigmaCl*TMath::Sqrt(cl->GetSigmaZ2());
1611 if (cl->GetY()-nSigmaY<det.GetYmin()) det.SetYmin(cl->GetY()-nSigmaY);
1612 if (cl->GetY()+nSigmaY>det.GetYmax()) det.SetYmax(cl->GetY()+nSigmaY);
1613 if (cl->GetZ()-nSigmaZ<det.GetZmin()) det.SetZmin(cl->GetZ()-nSigmaZ);
1614 if (cl->GetZ()+nSigmaZ>det.GetZmax()) det.SetZmax(cl->GetZ()+nSigmaZ);
1615 //AD
1616 /*
1617 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1618 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1619 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1620 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
1621 */
1622 return 0;
1623}
1624//------------------------------------------------------------------------
1625void AliITStrackerMI::AliITSlayer::SortClusters()
1626{
1627 //
1628 //sort clusters
1629 //
1630 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1631 Float_t *z = new Float_t[fN];
1632 Int_t * index = new Int_t[fN];
1633 //
1634 fMaxSigmaClY=0.; //AD
1635 fMaxSigmaClZ=0.; //AD
1636
1637 for (Int_t i=0;i<fN;i++){
1638 z[i] = fClusters[i]->GetZ();
1639 // save largest errors in y and z for this layer
1640 fMaxSigmaClY=TMath::Max(fMaxSigmaClY,TMath::Sqrt(fClusters[i]->GetSigmaY2()));
1641 fMaxSigmaClZ=TMath::Max(fMaxSigmaClZ,TMath::Sqrt(fClusters[i]->GetSigmaZ2()));
1642 }
1643 TMath::Sort(fN,z,index,kFALSE);
1644 for (Int_t i=0;i<fN;i++){
1645 clusters[i] = fClusters[index[i]];
1646 }
1647 //
1648 for (Int_t i=0;i<fN;i++){
1649 fClusters[i] = clusters[i];
1650 fZ[i] = fClusters[i]->GetZ();
1651 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1652 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1653 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1654 fY[i] = y;
1655 }
1656 delete[] index;
1657 delete[] z;
1658 delete[] clusters;
1659 //
1660
1661 fYB[0]=10000000;
1662 fYB[1]=-10000000;
1663 for (Int_t i=0;i<fN;i++){
1664 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1665 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1666 fClusterIndex[i] = i;
1667 }
1668 //
1669 // fill slices
1670 fDy5 = (fYB[1]-fYB[0])/5.;
1671 fDy10 = (fYB[1]-fYB[0])/10.;
1672 fDy20 = (fYB[1]-fYB[0])/20.;
1673 for (Int_t i=0;i<6;i++) fN5[i] =0;
1674 for (Int_t i=0;i<11;i++) fN10[i]=0;
1675 for (Int_t i=0;i<21;i++) fN20[i]=0;
1676 //
1677 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;}
1678 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;}
1679 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;}
1680 //
1681 //
1682 for (Int_t i=0;i<fN;i++)
1683 for (Int_t irot=-1;irot<=1;irot++){
1684 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1685 // slice 5
1686 for (Int_t slice=0; slice<6;slice++){
1687 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<AliITSRecoParam::GetMaxClusterPerLayer5()){
1688 fClusters5[slice][fN5[slice]] = fClusters[i];
1689 fY5[slice][fN5[slice]] = curY;
1690 fZ5[slice][fN5[slice]] = fZ[i];
1691 fClusterIndex5[slice][fN5[slice]]=i;
1692 fN5[slice]++;
1693 }
1694 }
1695 // slice 10
1696 for (Int_t slice=0; slice<11;slice++){
1697 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<AliITSRecoParam::GetMaxClusterPerLayer10()){
1698 fClusters10[slice][fN10[slice]] = fClusters[i];
1699 fY10[slice][fN10[slice]] = curY;
1700 fZ10[slice][fN10[slice]] = fZ[i];
1701 fClusterIndex10[slice][fN10[slice]]=i;
1702 fN10[slice]++;
1703 }
1704 }
1705 // slice 20
1706 for (Int_t slice=0; slice<21;slice++){
1707 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<AliITSRecoParam::GetMaxClusterPerLayer20()){
1708 fClusters20[slice][fN20[slice]] = fClusters[i];
1709 fY20[slice][fN20[slice]] = curY;
1710 fZ20[slice][fN20[slice]] = fZ[i];
1711 fClusterIndex20[slice][fN20[slice]]=i;
1712 fN20[slice]++;
1713 }
1714 }
1715 }
1716
1717 //
1718 // consistency check
1719 //
1720 for (Int_t i=0;i<fN-1;i++){
1721 if (fZ[i]>fZ[i+1]){
1722 printf("Bug\n");
1723 }
1724 }
1725 //
1726 for (Int_t slice=0;slice<21;slice++)
1727 for (Int_t i=0;i<fN20[slice]-1;i++){
1728 if (fZ20[slice][i]>fZ20[slice][i+1]){
1729 printf("Bug\n");
1730 }
1731 }
1732
1733
1734}
1735//------------------------------------------------------------------------
1736Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1737 //--------------------------------------------------------------------
1738 // This function returns the index of the nearest cluster
1739 //--------------------------------------------------------------------
1740 Int_t ncl=0;
1741 const Float_t *zcl;
1742 if (fCurrentSlice<0) {
1743 ncl = fN;
1744 zcl = fZ;
1745 }
1746 else{
1747 ncl = fNcs;
1748 zcl = fZcs;;
1749 }
1750
1751 if (ncl==0) return 0;
1752 Int_t b=0, e=ncl-1, m=(b+e)/2;
1753 for (; b<e; m=(b+e)/2) {
1754 // if (z > fClusters[m]->GetZ()) b=m+1;
1755 if (z > zcl[m]) b=m+1;
1756 else e=m;
1757 }
1758 return m;
1759}
1760//------------------------------------------------------------------------
1761Bool_t AliITStrackerMI::ComputeRoad(AliITStrackMI* track,Int_t ilayer,Int_t idet,Double_t &zmin,Double_t &zmax,Double_t &ymin,Double_t &ymax) const {
1762 //--------------------------------------------------------------------
1763 // This function computes the rectangular road for this track
1764 //--------------------------------------------------------------------
1765
1766
1767 AliITSdetector &det = fgLayers[ilayer].GetDetector(idet);
1768 // take into account the misalignment: propagate track to misaligned detector plane
1769 if (!track->Propagate(det.GetPhi(),det.GetRmisal())) return kFALSE;
1770
1771 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
1772 TMath::Sqrt(track->GetSigmaZ2() +
1773 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1774 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1775 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
1776 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
1777 TMath::Sqrt(track->GetSigmaY2() +
1778 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1779 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1780 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
1781
1782 // track at boundary between detectors, enlarge road
1783 Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidth();
1784 if ( (track->GetY()-dy < det.GetYmin()+boundaryWidth) ||
1785 (track->GetY()+dy > det.GetYmax()-boundaryWidth) ||
1786 (track->GetZ()-dz < det.GetZmin()+boundaryWidth) ||
1787 (track->GetZ()+dz > det.GetZmax()-boundaryWidth) ) {
1788 Float_t tgl = TMath::Abs(track->GetTgl());
1789 if (tgl > 1.) tgl=1.;
1790 Double_t deltaXNeighbDets=AliITSRecoParam::GetDeltaXNeighbDets();
1791 dz = TMath::Sqrt(dz*dz+deltaXNeighbDets*deltaXNeighbDets*tgl*tgl);
1792 Float_t snp = TMath::Abs(track->GetSnp());
1793 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) return kFALSE;
1794 dy = TMath::Sqrt(dy*dy+deltaXNeighbDets*deltaXNeighbDets*snp*snp);
1795 } // boundary
1796
1797 // add to the road a term (up to 2-3 mm) to deal with misalignments
1798 dy = TMath::Sqrt(dy*dy + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1799 dz = TMath::Sqrt(dz*dz + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1800
1801 Double_t r = fgLayers[ilayer].GetR();
1802 zmin = track->GetZ() - dz;
1803 zmax = track->GetZ() + dz;
1804 ymin = track->GetY() + r*det.GetPhi() - dy;
1805 ymax = track->GetY() + r*det.GetPhi() + dy;
1806
1807 // bring track back to idead detector plane
1808 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
1809
1810 return kTRUE;
1811}
1812//------------------------------------------------------------------------
1813void AliITStrackerMI::AliITSlayer::
1814SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1815 //--------------------------------------------------------------------
1816 // This function sets the "window"
1817 //--------------------------------------------------------------------
1818
1819 Double_t circle=2*TMath::Pi()*fR;
1820 fYmin = ymin;
1821 fYmax = ymax;
1822 fZmin = zmin;
1823 fZmax = zmax;
1824 // AD
1825 // enlarge road in y by maximum cluster error on this layer (3 sigma)
1826 fYmin -= fNMaxSigmaCl*fMaxSigmaClY;
1827 fYmax += fNMaxSigmaCl*fMaxSigmaClY;
1828 fZmin -= fNMaxSigmaCl*fMaxSigmaClZ;
1829 fZmax += fNMaxSigmaCl*fMaxSigmaClZ;
1830
1831 Float_t ymiddle = (fYmin+fYmax)*0.5;
1832 if (ymiddle<fYB[0]) {
1833 fYmin+=circle; fYmax+=circle; ymiddle+=circle;
1834 } else if (ymiddle>fYB[1]) {
1835 fYmin-=circle; fYmax-=circle; ymiddle-=circle;
1836 }
1837
1838 //
1839 fCurrentSlice =-1;
1840 // defualt take all
1841 fClustersCs = fClusters;
1842 fClusterIndexCs = fClusterIndex;
1843 fYcs = fY;
1844 fZcs = fZ;
1845 fNcs = fN;
1846 //
1847 //is in 20 slice?
1848 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1849 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1850 if (slice<0) slice=0;
1851 if (slice>20) slice=20;
1852 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1853 if (isOK) {
1854 fCurrentSlice=slice;
1855 fClustersCs = fClusters20[fCurrentSlice];
1856 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1857 fYcs = fY20[fCurrentSlice];
1858 fZcs = fZ20[fCurrentSlice];
1859 fNcs = fN20[fCurrentSlice];
1860 }
1861 }
1862 //
1863 //is in 10 slice?
1864 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1865 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1866 if (slice<0) slice=0;
1867 if (slice>10) slice=10;
1868 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1869 if (isOK) {
1870 fCurrentSlice=slice;
1871 fClustersCs = fClusters10[fCurrentSlice];
1872 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1873 fYcs = fY10[fCurrentSlice];
1874 fZcs = fZ10[fCurrentSlice];
1875 fNcs = fN10[fCurrentSlice];
1876 }
1877 }
1878 //
1879 //is in 5 slice?
1880 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1881 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1882 if (slice<0) slice=0;
1883 if (slice>5) slice=5;
1884 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1885 if (isOK) {
1886 fCurrentSlice=slice;
1887 fClustersCs = fClusters5[fCurrentSlice];
1888 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1889 fYcs = fY5[fCurrentSlice];
1890 fZcs = fZ5[fCurrentSlice];
1891 fNcs = fN5[fCurrentSlice];
1892 }
1893 }
1894 //
1895 fI = FindClusterIndex(fZmin);
1896 fImax = TMath::Min(FindClusterIndex(fZmax)+1,fNcs);
1897 fSkip = 0;
1898 fAccepted = 0;
1899
1900 return;
1901}
1902//------------------------------------------------------------------------
1903Int_t AliITStrackerMI::AliITSlayer::
1904FindDetectorIndex(Double_t phi, Double_t z) const {
1905 //--------------------------------------------------------------------
1906 //This function finds the detector crossed by the track
1907 //--------------------------------------------------------------------
1908 Double_t dphi;
1909 if (fZOffset<0) // old geometry
1910 dphi = -(phi-fPhiOffset);
1911 else // new geometry
1912 dphi = phi-fPhiOffset;
1913
1914
1915 if (dphi < 0) dphi += 2*TMath::Pi();
1916 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1917 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1918 if (np>=fNladders) np-=fNladders;
1919 if (np<0) np+=fNladders;
1920
1921
1922 Double_t dz=fZOffset-z;
1923 Double_t nnz = dz*(fNdetectors-1)*0.5/fZOffset+0.5;
1924 Int_t nz = (nnz<0 ? -1 : (Int_t)nnz);
1925 if (nz>=fNdetectors || nz<0) {
1926 //printf("ndet %d phi %f z %f np %d nz %d\n",fNdetectors,phi,z,np,nz);
1927 return -1;
1928 }
1929
1930 // ad hoc correction for 3rd ladder of SDD inner layer,
1931 // which is reversed (rotated by pi around local y)
1932 // this correction is OK only from AliITSv11Hybrid onwards
1933 if (GetR()>12. && GetR()<20.) { // SDD inner
1934 if(np==2) { // 3rd ladder
1935 Double_t posMod252[3];
1936 AliITSgeomTGeo::GetTranslation(252,posMod252);
1937 // check the Z coordinate of Mod 252: if negative
1938 // (old SDD geometry in AliITSv11Hybrid)
1939 // the swap of numeration whould be applied
1940 if(posMod252[2]<0.){
1941 nz = (fNdetectors-1) - nz;
1942 }
1943 }
1944 }
1945 //printf("ndet %d phi %f z %f np %d nz %d\n",fNdetectors,phi,z,np,nz);
1946
1947
1948 return np*fNdetectors + nz;
1949}
1950//------------------------------------------------------------------------
1951const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci,Bool_t test)
1952{
1953 //--------------------------------------------------------------------
1954 // This function returns clusters within the "window"
1955 //--------------------------------------------------------------------
1956
1957 if (fCurrentSlice<0) {
1958 Double_t rpi2 = 2.*fR*TMath::Pi();
1959 for (Int_t i=fI; i<fImax; i++) {
1960 Double_t y = fY[i];
1961 Double_t z = fZ[i];
1962 if (fYmax<y) y -= rpi2;
1963 if (fYmin>y) y += rpi2;
1964 if (y<fYmin) continue;
1965 if (y>fYmax) continue;
1966 // AD
1967 // skip clusters that are in "extended" road but they
1968 // 3sigma error does not touch the original road
1969 if (z+fNMaxSigmaCl*TMath::Sqrt(fClusters[i]->GetSigmaZ2())<fZmin+fNMaxSigmaCl*fMaxSigmaClZ) continue;
1970 if (z-fNMaxSigmaCl*TMath::Sqrt(fClusters[i]->GetSigmaZ2())>fZmax-fNMaxSigmaCl*fMaxSigmaClZ) continue;
1971 //
1972 if (TMath::Abs(fClusters[i]->GetQ())<1.e-13 && fSkip==2) continue;
1973 ci=i;
1974 if (!test) fI=i+1;
1975 return fClusters[i];
1976 }
1977 } else {
1978 for (Int_t i=fI; i<fImax; i++) {
1979 if (fYcs[i]<fYmin) continue;
1980 if (fYcs[i]>fYmax) continue;
1981 if (TMath::Abs(fClustersCs[i]->GetQ())<1.e-13 && fSkip==2) continue;
1982 ci=fClusterIndexCs[i];
1983 if (!test) fI=i+1;
1984 return fClustersCs[i];
1985 }
1986 }
1987 return 0;
1988}
1989//------------------------------------------------------------------------
1990Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1991const {
1992 //--------------------------------------------------------------------
1993 // This function returns the layer thickness at this point (units X0)
1994 //--------------------------------------------------------------------
1995 Double_t d=0.0085;
1996 x0=AliITSRecoParam::GetX0Air();
1997 if (43<fR&&fR<45) { //SSD2
1998 Double_t dd=0.0034;
1999 d=dd;
2000 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2001 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
2002 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
2003 for (Int_t i=0; i<12; i++) {
2004 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
2005 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2006 d+=0.0034;
2007 break;
2008 }
2009 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
2010 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2011 d+=0.0034;
2012 break;
2013 }
2014 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2015 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2016 }
2017 } else
2018 if (37<fR&&fR<41) { //SSD1
2019 Double_t dd=0.0034;
2020 d=dd;
2021 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2022 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
2023 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
2024 for (Int_t i=0; i<11; i++) {
2025 if (TMath::Abs(z-3.9*i)<0.15) {
2026 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2027 d+=dd;
2028 break;
2029 }
2030 if (TMath::Abs(z+3.9*i)<0.15) {
2031 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2032 d+=dd;
2033 break;
2034 }
2035 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2036 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2037 }
2038 } else
2039 if (13<fR&&fR<26) { //SDD
2040 Double_t dd=0.0033;
2041 d=dd;
2042 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2043
2044 if (TMath::Abs(y-1.80)<0.55) {
2045 d+=0.016;
2046 for (Int_t j=0; j<20; j++) {
2047 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2048 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2049 }
2050 }
2051 if (TMath::Abs(y+1.80)<0.55) {
2052 d+=0.016;
2053 for (Int_t j=0; j<20; j++) {
2054 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2055 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2056 }
2057 }
2058
2059 for (Int_t i=0; i<4; i++) {
2060 if (TMath::Abs(z-7.3*i)<0.60) {
2061 d+=dd;
2062 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2063 break;
2064 }
2065 if (TMath::Abs(z+7.3*i)<0.60) {
2066 d+=dd;
2067 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2068 break;
2069 }
2070 }
2071 } else
2072 if (6<fR&&fR<8) { //SPD2
2073 Double_t dd=0.0063; x0=21.5;
2074 d=dd;
2075 if (TMath::Abs(y-3.08)>0.5) d+=dd;
2076 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
2077 } else
2078 if (3<fR&&fR<5) { //SPD1
2079 Double_t dd=0.0063; x0=21.5;
2080 d=dd;
2081 if (TMath::Abs(y+0.21)>0.6) d+=dd;
2082 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
2083 }
2084
2085 return d;
2086}
2087//------------------------------------------------------------------------
2088AliITStrackerMI::AliITSdetector::AliITSdetector(const AliITSdetector& det):
2089fR(det.fR),
2090fRmisal(det.fRmisal),
2091fPhi(det.fPhi),
2092fSinPhi(det.fSinPhi),
2093fCosPhi(det.fCosPhi),
2094fYmin(det.fYmin),
2095fYmax(det.fYmax),
2096fZmin(det.fZmin),
2097fZmax(det.fZmax),
2098fIsBad(det.fIsBad),
2099fNChips(det.fNChips),
2100fChipIsBad(det.fChipIsBad)
2101{
2102 //Copy constructor
2103}
2104//------------------------------------------------------------------------
2105void AliITStrackerMI::AliITSdetector::ReadBadDetectorAndChips(Int_t ilayer,Int_t idet,
2106 const AliITSDetTypeRec *detTypeRec)
2107{
2108 //--------------------------------------------------------------------
2109 // Read bad detectors and chips from calibration objects in AliITSDetTypeRec
2110 //--------------------------------------------------------------------
2111
2112 // In AliITSDetTypeRec, detector numbers go from 0 to 2197
2113 // while in the tracker they start from 0 for each layer
2114 for(Int_t il=0; il<ilayer; il++)
2115 idet += AliITSgeomTGeo::GetNLadders(il+1)*AliITSgeomTGeo::GetNDetectors(il+1);
2116
2117 Int_t detType;
2118 if (ilayer==0 || ilayer==1) { // ---------- SPD
2119 detType = 0;
2120 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
2121 detType = 1;
2122 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
2123 detType = 2;
2124 } else {
2125 printf("AliITStrackerMI::AliITSdetector::InitBadFromOCDB: Wrong layer number %d\n",ilayer);
2126 return;
2127 }
2128
2129 // Get calibration from AliITSDetTypeRec
2130 AliITSCalibration *calib = (AliITSCalibration*)detTypeRec->GetCalibrationModel(idet);
2131 calib->SetModuleIndex(idet);
2132 AliITSCalibration *calibSPDdead = 0;
2133 if(detType==0) calibSPDdead = (AliITSCalibration*)detTypeRec->GetSPDDeadModel(idet); // TEMPORARY
2134 if (calib->IsBad() ||
2135 (detType==0 && calibSPDdead->IsBad())) // TEMPORARY
2136 {
2137 SetBad();
2138 // printf("lay %d bad %d\n",ilayer,idet);
2139 }
2140
2141 // Get segmentation from AliITSDetTypeRec
2142 AliITSsegmentation *segm = (AliITSsegmentation*)detTypeRec->GetSegmentationModel(detType);
2143
2144 // Read info about bad chips
2145 fNChips = segm->GetMaximumChipIndex()+1;
2146 //printf("ilayer %d detType %d idet %d fNChips %d %d GetNumberOfChips %d\n",ilayer,detType,idet,fNChips,segm->GetMaximumChipIndex(),segm->GetNumberOfChips());
2147 if(fChipIsBad) { delete [] fChipIsBad; fChipIsBad=NULL; }
2148 fChipIsBad = new Bool_t[fNChips];
2149 for (Int_t iCh=0;iCh<fNChips;iCh++) {
2150 fChipIsBad[iCh] = calib->IsChipBad(iCh);
2151 if (detType==0 && calibSPDdead->IsChipBad(iCh)) fChipIsBad[iCh] = kTRUE; // TEMPORARY
2152 //if(fChipIsBad[iCh]) {printf("lay %d det %d bad chip %d\n",ilayer,idet,iCh);}
2153 }
2154
2155 return;
2156}
2157//------------------------------------------------------------------------
2158Double_t AliITStrackerMI::GetEffectiveThickness()
2159{
2160 //--------------------------------------------------------------------
2161 // Returns the thickness between the current layer and the vertex (units X0)
2162 //--------------------------------------------------------------------
2163
2164 if(fUseTGeo!=0) {
2165 if(fxOverX0Layer[0]<0) BuildMaterialLUT("Layers");
2166 if(fxOverX0Shield[0]<0) BuildMaterialLUT("Shields");
2167 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
2168 }
2169
2170 // beam pipe
2171 Double_t dPipe = (fUseTGeo==0 ? AliITSRecoParam::GetdPipe() : fxOverX0Pipe);
2172 Double_t d=dPipe*AliITSRecoParam::GetrPipe()*AliITSRecoParam::GetrPipe();
2173
2174 // layers
2175 Double_t x0=0;
2176 Double_t xn=fgLayers[fI].GetR();
2177 for (Int_t i=0; i<fI; i++) {
2178 Double_t xi=fgLayers[i].GetR();
2179 Double_t dLayer = (fUseTGeo==0 ? fgLayers[i].GetThickness(0,0,x0) : fxOverX0Layer[i]);
2180 d+=dLayer*xi*xi;
2181 }
2182
2183 // shields
2184 if (fI>1) {
2185 Double_t dshieldSPD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(0) : fxOverX0Shield[0]);
2186 d+=dshieldSPD*AliITSRecoParam::GetrInsideShield(0)*AliITSRecoParam::GetrInsideShield(0);
2187 }
2188 if (fI>3) {
2189 Double_t dshieldSDD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(1) : fxOverX0Shield[1]);
2190 d+=dshieldSDD*AliITSRecoParam::GetrInsideShield(1)*AliITSRecoParam::GetrInsideShield(1);
2191 }
2192 return d/(xn*xn);
2193}
2194//------------------------------------------------------------------------
2195Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
2196 //-------------------------------------------------------------------
2197 // This function returns number of clusters within the "window"
2198 //--------------------------------------------------------------------
2199 Int_t ncl=0;
2200 for (Int_t i=fI; i<fN; i++) {
2201 const AliITSRecPoint *c=fClusters[i];
2202 if (c->GetZ() > fZmax) break;
2203 if (c->IsUsed()) continue;
2204 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
2205 Double_t y=fR*det.GetPhi() + c->GetY();
2206
2207 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
2208 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
2209
2210 if (y<fYmin) continue;
2211 if (y>fYmax) continue;
2212 ncl++;
2213 }
2214 return ncl;
2215}
2216//------------------------------------------------------------------------
2217Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2218 const AliITStrackMI *clusters,Bool_t extra, Bool_t planeeff)
2219{
2220 //--------------------------------------------------------------------
2221 // This function refits the track "track" at the position "x" using
2222 // the clusters from "clusters"
2223 // If "extra"==kTRUE,
2224 // the clusters from overlapped modules get attached to "track"
2225 // If "planeff"==kTRUE,
2226 // special approach for plane efficiency evaluation is applyed
2227 //--------------------------------------------------------------------
2228
2229 Int_t index[AliITSgeomTGeo::kNLayers];
2230 Int_t k;
2231 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2232 Int_t nc=clusters->GetNumberOfClusters();
2233 for (k=0; k<nc; k++) {
2234 Int_t idx=clusters->GetClusterIndex(k);
2235 Int_t ilayer=(idx&0xf0000000)>>28;
2236 index[ilayer]=idx;
2237 }
2238
2239 return RefitAt(xx,track,index,extra,planeeff); // call the method below
2240}
2241//------------------------------------------------------------------------
2242Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
2243 const Int_t *clusters,Bool_t extra, Bool_t planeeff)
2244{
2245 //--------------------------------------------------------------------
2246 // This function refits the track "track" at the position "x" using
2247 // the clusters from array
2248 // If "extra"==kTRUE,
2249 // the clusters from overlapped modules get attached to "track"
2250 // If "planeff"==kTRUE,
2251 // special approach for plane efficiency evaluation is applyed
2252 //--------------------------------------------------------------------
2253 Int_t index[AliITSgeomTGeo::kNLayers];
2254 Int_t k;
2255 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
2256 //
2257 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
2258 index[k]=clusters[k];
2259 }
2260
2261 // special for cosmics and TPC prolonged tracks:
2262 // propagate to the innermost of:
2263 // - innermost layer crossed by the track
2264 // - innermost layer where a cluster was associated to the track
2265 static AliITSRecoParam *repa = NULL;
2266 if(!repa){
2267 repa = (AliITSRecoParam*) AliITSReconstructor::GetRecoParam();
2268 if(!repa){
2269 repa = AliITSRecoParam::GetHighFluxParam();
2270 AliWarning("Using default AliITSRecoParam class");
2271 }
2272 }
2273 Int_t evsp=repa->GetEventSpecie();
2274
2275 Int_t innermostlayer=0;
2276 if((evsp&AliRecoParam::kCosmic) || (track->GetStatus()&AliESDtrack::kTPCin)) {
2277 innermostlayer=5;
2278 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
2279 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
2280 if( (drphi < (fgLayers[innermostlayer].GetR()+1.)) ||
2281 index[innermostlayer] >= 0 ) break;
2282 }
2283
2284 AliDebug(2,Form(" drphi %f innermost %d",drphi,innermostlayer));
2285 }
2286
2287 Int_t modstatus=1; // found
2288 Float_t xloc,zloc;
2289 Int_t from, to, step;
2290 if (xx > track->GetX()) {
2291 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
2292 step=+1;
2293 } else {
2294 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
2295 step=-1;
2296 }
2297 TString dir = (step>0 ? "outward" : "inward");
2298
2299 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
2300 AliITSlayer &layer=fgLayers[ilayer];
2301 Double_t r=layer.GetR();
2302
2303 if (step<0 && xx>r) break;
2304
2305 // material between SSD and SDD, SDD and SPD
2306 Double_t hI=ilayer-0.5*step;
2307 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
2308 if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
2309 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
2310 if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
2311
2312
2313 Double_t oldGlobXYZ[3];
2314 if (!track->GetXYZ(oldGlobXYZ)) return kFALSE;
2315
2316 // continue if we are already beyond this layer
2317 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
2318 if(step>0 && oldGlobR > r) continue; // going outward
2319 if(step<0 && oldGlobR < r) continue; // going inward
2320
2321 Double_t phi,z;
2322 if (!track->GetPhiZat(r,phi,z)) return kFALSE;
2323
2324 Int_t idet=layer.FindDetectorIndex(phi,z);
2325
2326 // check if we allow a prolongation without point for large-eta tracks
2327 Int_t skip = CheckSkipLayer(track,ilayer,idet);
2328 if (skip==2) {
2329 modstatus = 4; // out in z
2330 if(LocalModuleCoord(ilayer,idet,track,xloc,zloc)) { // local module coords
2331 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2332 }
2333 // cross layer
2334 // apply correction for material of the current layer
2335 // add time if going outward
2336 CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir);
2337 continue;
2338 }
2339
2340 if (idet<0) return kFALSE;
2341
2342
2343 const AliITSdetector &det=layer.GetDetector(idet);
2344 // only for ITS-SA tracks refit
2345 if (ilayer>1 && fTrackingPhase.Contains("RefitInward") && !(track->GetStatus()&AliESDtrack::kTPCin)) track->SetCheckInvariant(kFALSE);
2346 //
2347 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
2348
2349 track->SetDetectorIndex(idet);
2350 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2351
2352 Double_t dz,zmin,zmax,dy,ymin,ymax;
2353
2354 const AliITSRecPoint *clAcc=0;
2355 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2356
2357 Int_t idx=index[ilayer];
2358 if (idx>=0) { // cluster in this layer
2359 modstatus = 6; // no refit
2360 const AliITSRecPoint *cl=(AliITSRecPoint *)GetCluster(idx);
2361 if (cl) {
2362 if (idet != cl->GetDetectorIndex()) {
2363 idet=cl->GetDetectorIndex();
2364 const AliITSdetector &detc=layer.GetDetector(idet);
2365 if (!track->Propagate(detc.GetPhi(),detc.GetR())) return kFALSE;
2366 track->SetDetectorIndex(idet);
2367 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
2368 }
2369 Int_t cllayer = (idx & 0xf0000000) >> 28;;
2370 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
2371 if (chi2<maxchi2) {
2372 clAcc=cl;
2373 maxchi2=chi2;
2374 modstatus = 1; // found
2375 } else {
2376 return kFALSE; //
2377 }
2378 }
2379 } else { // no cluster in this layer
2380 if (skip==1) {
2381 modstatus = 3; // skipped
2382 // Plane Eff determination:
2383 if (planeeff && ilayer==AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()) {
2384 if (IsOKForPlaneEff(track,clusters,ilayer)) // only adequate track for plane eff. evaluation
2385 UseTrackForPlaneEff(track,ilayer);
2386 }
2387 } else {
2388 modstatus = 5; // no cls in road
2389 // check dead
2390 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2391 dz = 0.5*(zmax-zmin);
2392 dy = 0.5*(ymax-ymin);
2393 Int_t dead = CheckDeadZone(track,ilayer,idet,dz,dy,kTRUE);
2394 if (dead==1) modstatus = 7; // holes in z in SPD
2395 if (dead==2 || dead==3 || dead==4) modstatus = 2; // dead from OCDB
2396 }
2397 }
2398
2399 if (clAcc) {
2400 if (!UpdateMI(track,clAcc,maxchi2,idx)) return kFALSE;
2401 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
2402 }
2403 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2404
2405
2406 if (extra) { // search for extra clusters in overlapped modules
2407 AliITStrackV2 tmp(*track);
2408 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2409 layer.SelectClusters(zmin,zmax,ymin,ymax);
2410
2411 const AliITSRecPoint *clExtra=0; Int_t ci=-1,cci=-1;
2412 Int_t idetExtra=-1;
2413 maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2414 Double_t tolerance=0.1;
2415 while ((clExtra=layer.GetNextCluster(ci))!=0) {
2416 // only clusters in another module! (overlaps)
2417 idetExtra = clExtra->GetDetectorIndex();
2418 if (idet == idetExtra) continue;
2419
2420 const AliITSdetector &detx=layer.GetDetector(idetExtra);
2421
2422 if (!tmp.Propagate(detx.GetPhi(),detx.GetR()+clExtra->GetX())) continue;
2423 if (TMath::Abs(tmp.GetZ() - clExtra->GetZ()) > tolerance) continue;
2424 if (TMath::Abs(tmp.GetY() - clExtra->GetY()) > tolerance) continue;
2425 if (!tmp.Propagate(detx.GetPhi(),detx.GetR())) continue;
2426
2427 Double_t chi2=tmp.GetPredictedChi2(clExtra);
2428 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
2429 }
2430 if (cci>=0) {
2431 track->SetExtraCluster(ilayer,(ilayer<<28)+cci);
2432 track->SetExtraModule(ilayer,idetExtra);
2433 }
2434 } // end search for extra clusters in overlapped modules
2435
2436 // Correct for material of the current layer
2437 // cross material
2438 // add time if going outward
2439 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)) return kFALSE;
2440 track->SetCheckInvariant(kTRUE);
2441 } // end loop on layers
2442
2443 if (!track->PropagateTo(xx,0.,0.)) return kFALSE;
2444
2445 return kTRUE;
2446}
2447//------------------------------------------------------------------------
2448Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
2449{
2450 //
2451 // calculate normalized chi2
2452 // return NormalizedChi2(track,0);
2453 Float_t chi2 = 0;
2454 Float_t sum=0;
2455 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2456 // track->fdEdxMismatch=0;
2457 Float_t dedxmismatch =0;
2458 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2459 if (mode<100){
2460 for (Int_t i = 0;i<6;i++){
2461 if (track->GetClIndex(i)>=0){
2462 Float_t cerry, cerrz;
2463 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2464 else
2465 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2466 cerry*=cerry;
2467 cerrz*=cerrz;
2468 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
2469 if (i>1 && AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(i)) {
2470 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
2471 if (ratio<0.5) {
2472 cchi2+=(0.5-ratio)*10.;
2473 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2474 dedxmismatch+=(0.5-ratio)*10.;
2475 }
2476 }
2477 if (i<2 ||i>3){
2478 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
2479 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2480 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2481 if (i<2) chi2+=2*cl->GetDeltaProbability();
2482 }
2483 chi2+=cchi2;
2484 sum++;
2485 }
2486 }
2487 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2488 track->SetdEdxMismatch(dedxmismatch);
2489 }
2490 }
2491 else{
2492 for (Int_t i = 0;i<4;i++){
2493 if (track->GetClIndex(i)>=0){
2494 Float_t cerry, cerrz;
2495 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2496 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2497 cerry*=cerry;
2498 cerrz*=cerrz;
2499 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2500 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
2501 sum++;
2502 }
2503 }
2504 for (Int_t i = 4;i<6;i++){
2505 if (track->GetClIndex(i)>=0){
2506 Float_t cerry, cerrz;
2507 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2508 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
2509 cerry*=cerry;
2510 cerrz*=cerrz;
2511 Float_t cerryb, cerrzb;
2512 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
2513 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
2514 cerryb*=cerryb;
2515 cerrzb*=cerrzb;
2516 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2517 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
2518 sum++;
2519 }
2520 }
2521 }
2522 if (track->GetESDtrack()->GetTPCsignal()>85){
2523 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
2524 if (ratio<0.5) {
2525 chi2+=(0.5-ratio)*5.;
2526 }
2527 if (ratio>2){
2528 chi2+=(ratio-2.0)*3;
2529 }
2530 }
2531 //
2532 Double_t match = TMath::Sqrt(track->GetChi22());
2533 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2534 if (!track->GetConstrain()) {
2535 if (track->GetNumberOfClusters()>2) {
2536 match/=track->GetNumberOfClusters()-2.;
2537 } else {
2538 match=0;
2539 }
2540 }
2541 if (match<0) match=0;
2542
2543 // penalty factor for missing points (NDeadZone>0), but no penalty
2544 // for layer with deadZoneProb close to 1 (either we wanted to skip layer
2545 // or there is a dead from OCDB)
2546 Float_t deadzonefactor = 0.;
2547 if (track->GetNDeadZone()>0.) {
2548 Int_t sumDeadZoneProbability=0;
2549 for(Int_t ilay=0;ilay<6;ilay++) {
2550 if(track->GetDeadZoneProbability(ilay)>0.) sumDeadZoneProbability++;
2551 }
2552 Int_t nDeadZoneWithProbNot1=(Int_t)(track->GetNDeadZone())-sumDeadZoneProbability;
2553 if(nDeadZoneWithProbNot1>0) {
2554 Float_t deadZoneProbability = track->GetNDeadZone()-(Float_t)sumDeadZoneProbability;
2555 AliDebug(2,Form("nDeadZone %f sumDZProbability %f nDZWithProbNot1 %f deadZoneProb %f\n",track->GetNDeadZone(),sumDeadZoneProbability,nDeadZoneWithProbNot1,deadZoneProbability));
2556 deadZoneProbability /= (Float_t)nDeadZoneWithProbNot1;
2557 Float_t one = 1.;
2558 deadZoneProbability = TMath::Min(deadZoneProbability,one);
2559 deadzonefactor = 3.*(1.1-deadZoneProbability);
2560 }
2561 }
2562
2563 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2564 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2565 1./(1.+track->GetNSkipped()));
2566 AliDebug(2,Form("match %f deadzonefactor %f chi2 %f sum %f skipped\n",match,deadzonefactor,chi2,sum,track->GetNSkipped()));
2567 AliDebug(2,Form("NormChi2 %f cls %d\n",normchi2,track->GetNumberOfClusters()));
2568 return normchi2;
2569}
2570//------------------------------------------------------------------------
2571Double_t AliITStrackerMI::GetMatchingChi2(const AliITStrackMI * track1,const AliITStrackMI * track2)
2572{
2573 //
2574 // return matching chi2 between two tracks
2575 Double_t largeChi2=1000.;
2576
2577 AliITStrackMI track3(*track2);
2578 if (!track3.Propagate(track1->GetAlpha(),track1->GetX())) return largeChi2;
2579 TMatrixD vec(5,1);
2580 vec(0,0)=track1->GetY() - track3.GetY();
2581 vec(1,0)=track1->GetZ() - track3.GetZ();
2582 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2583 vec(3,0)=track1->GetTgl() - track3.GetTgl();
2584 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
2585 //
2586 TMatrixD cov(5,5);
2587 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2588 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2589 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2590 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2591 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
2592
2593 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2594 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2595 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2596 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
2597 //
2598 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2599 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2600 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
2601 //
2602 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2603 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
2604 //
2605 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
2606
2607 cov.Invert();
2608 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2609 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2610 return chi2(0,0);
2611}
2612//------------------------------------------------------------------------
2613Double_t AliITStrackerMI::GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr) const
2614{
2615 //
2616 // return probability that given point (characterized by z position and error)
2617 // is in SPD dead zone
2618 // This method assumes that fSPDdetzcentre is ordered from -z to +z
2619 //
2620 Double_t probability = 0.;
2621 Double_t nearestz = 0.,distz=0.;
2622 Int_t nearestzone = -1;
2623 Double_t mindistz = 1000.;
2624
2625 // find closest dead zone
2626 for (Int_t i=0; i<3; i++) {
2627 distz=TMath::Abs(zpos-0.5*(fSPDdetzcentre[i]+fSPDdetzcentre[i+1]));
2628 if (distz<mindistz) {
2629 nearestzone=i;
2630 nearestz=0.5*(fSPDdetzcentre[i]+fSPDdetzcentre[i+1]);
2631 mindistz=distz;
2632 }
2633 }
2634
2635 // too far from dead zone
2636 if (TMath::Abs(zpos-nearestz)>0.25+3.*zerr) return probability;
2637
2638
2639 Double_t zmin, zmax;
2640 if (nearestzone==0) { // dead zone at z = -7
2641 zmin = fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2642 zmax = fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2643 } else if (nearestzone==1) { // dead zone at z = 0
2644 zmin = fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2645 zmax = fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2646 } else if (nearestzone==2) { // dead zone at z = +7
2647 zmin = fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2648 zmax = fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength();
2649 } else {
2650 zmin = 0.;
2651 zmax = 0.;
2652 }
2653 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2654 // dead zone)
2655 probability = 0.5*( AliMathBase::ErfFast((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2656 AliMathBase::ErfFast((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
2657 AliDebug(2,Form("zpos %f +- %f nearestzone %d zmin zmax %f %f prob %f\n",zpos,zerr,nearestzone,zmin,zmax,probability));
2658 return probability;
2659}
2660//------------------------------------------------------------------------
2661Double_t AliITStrackerMI::GetTruncatedChi2(const AliITStrackMI * track, Float_t fac)
2662{
2663 //
2664 // calculate normalized chi2
2665 Float_t chi2[6];
2666 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2667 Float_t ncl = 0;
2668 for (Int_t i = 0;i<6;i++){
2669 if (TMath::Abs(track->GetDy(i))>0){
2670 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2671 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
2672 ncl++;
2673 }
2674 else{chi2[i]=10000;}
2675 }
2676 Int_t index[6];
2677 TMath::Sort(6,chi2,index,kFALSE);
2678 Float_t max = float(ncl)*fac-1.;
2679 Float_t sumchi=0, sumweight=0;
2680 for (Int_t i=0;i<max+1;i++){
2681 Float_t weight = (i<max)?1.:(max+1.-i);
2682 sumchi+=weight*chi2[index[i]];
2683 sumweight+=weight;
2684 }
2685 Double_t normchi2 = sumchi/sumweight;
2686 return normchi2;
2687}
2688//------------------------------------------------------------------------
2689Double_t AliITStrackerMI::GetInterpolatedChi2(const AliITStrackMI * forwardtrack,const AliITStrackMI * backtrack)
2690{
2691 //
2692 // calculate normalized chi2
2693 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2694 Int_t npoints = 0;
2695 Double_t res =0;
2696 for (Int_t i=0;i<6;i++){
2697 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2698 Double_t sy1 = forwardtrack->GetSigmaY(i);
2699 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2700 Double_t sy2 = backtrack->GetSigmaY(i);
2701 Double_t sz2 = backtrack->GetSigmaZ(i);
2702 if (i<2){ sy2=1000.;sz2=1000;}
2703 //
2704 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2705 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
2706 //
2707 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2708 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2709 //
2710 res+= nz0*nz0+ny0*ny0;
2711 npoints++;
2712 }
2713 if (npoints>1) return
2714 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
2715 //2*forwardtrack->fNUsed+
2716 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2717 1./(1.+forwardtrack->GetNSkipped()));
2718 return 1000;
2719}
2720//------------------------------------------------------------------------
2721Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2722 //--------------------------------------------------------------------
2723 // Return pointer to a given cluster
2724 //--------------------------------------------------------------------
2725 Int_t l=(index & 0xf0000000) >> 28;
2726 Int_t c=(index & 0x0fffffff) >> 00;
2727 return fgLayers[l].GetWeight(c);
2728}
2729//------------------------------------------------------------------------
2730void AliITStrackerMI::RegisterClusterTracks(const AliITStrackMI* track,Int_t id)
2731{
2732 //---------------------------------------------
2733 // register track to the list
2734 //
2735 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
2736 //
2737 //
2738 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2739 Int_t index = track->GetClusterIndex(icluster);
2740 Int_t l=(index & 0xf0000000) >> 28;
2741 Int_t c=(index & 0x0fffffff) >> 00;
2742 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2743 for (Int_t itrack=0;itrack<4;itrack++){
2744 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2745 fgLayers[l].SetClusterTracks(itrack,c,id);
2746 break;
2747 }
2748 }
2749 }
2750}
2751//------------------------------------------------------------------------
2752void AliITStrackerMI::UnRegisterClusterTracks(const AliITStrackMI* track, Int_t id)
2753{
2754 //---------------------------------------------
2755 // unregister track from the list
2756 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2757 Int_t index = track->GetClusterIndex(icluster);
2758 Int_t l=(index & 0xf0000000) >> 28;
2759 Int_t c=(index & 0x0fffffff) >> 00;
2760 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2761 for (Int_t itrack=0;itrack<4;itrack++){
2762 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2763 fgLayers[l].SetClusterTracks(itrack,c,-1);
2764 }
2765 }
2766 }
2767}
2768//------------------------------------------------------------------------
2769Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
2770{
2771 //-------------------------------------------------------------
2772 //get number of shared clusters
2773 //-------------------------------------------------------------
2774 Float_t shared=0;
2775 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2776 // mean number of clusters
2777 Float_t *ny = GetNy(id), *nz = GetNz(id);
2778
2779
2780 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2781 Int_t index = track->GetClusterIndex(icluster);
2782 Int_t l=(index & 0xf0000000) >> 28;
2783 Int_t c=(index & 0x0fffffff) >> 00;
2784 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2785 if (ny[l]<1.e-13){
2786 printf("problem\n");
2787 }
2788 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2789 Float_t weight=1;
2790 //
2791 Float_t deltan = 0;
2792 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2793 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2794 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2795 if (l<2 || l>3){
2796 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2797 }
2798 else{
2799 deltan = (cl->GetNz()-nz[l]);
2800 }
2801 if (deltan>2.0) continue; // extended - highly probable shared cluster
2802 weight = 2./TMath::Max(3.+deltan,2.);
2803 //
2804 for (Int_t itrack=0;itrack<4;itrack++){
2805 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
2806 list[l]=index;
2807 clist[l] = (AliITSRecPoint*)GetCluster(index);
2808 shared+=weight;
2809 break;
2810 }
2811 }
2812 }
2813 track->SetNUsed(shared);
2814 return shared;
2815}
2816//------------------------------------------------------------------------
2817Int_t AliITStrackerMI::GetOverlapTrack(const AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
2818{
2819 //
2820 // find first shared track
2821 //
2822 // mean number of clusters
2823 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2824 //
2825 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2826 Int_t sharedtrack=100000;
2827 Int_t tracks[24],trackindex=0;
2828 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2829 //
2830 for (Int_t icluster=0;icluster<6;icluster++){
2831 if (clusterlist[icluster]<0) continue;
2832 Int_t index = clusterlist[icluster];
2833 Int_t l=(index & 0xf0000000) >> 28;
2834 Int_t c=(index & 0x0fffffff) >> 00;
2835 if (ny[l]<1.e-13){
2836 printf("problem\n");
2837 }
2838 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2839 //if (l>3) continue;
2840 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2841 //
2842 Float_t deltan = 0;
2843 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
2844 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2845 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
2846 if (l<2 || l>3){
2847 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2848 }
2849 else{
2850 deltan = (cl->GetNz()-nz[l]);
2851 }
2852 if (deltan>2.0) continue; // extended - highly probable shared cluster
2853 //
2854 for (Int_t itrack=3;itrack>=0;itrack--){
2855 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2856 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2857 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
2858 trackindex++;
2859 }
2860 }
2861 }
2862 if (trackindex==0) return -1;
2863 if (trackindex==1){
2864 sharedtrack = tracks[0];
2865 }else{
2866 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2867 else{
2868 //
2869 Int_t tracks2[24], cluster[24];
2870 for (Int_t i=0;i<trackindex;i++){ tracks2[i]=-1; cluster[i]=0;}
2871 Int_t index =0;
2872 //
2873 for (Int_t i=0;i<trackindex;i++){
2874 if (tracks[i]<0) continue;
2875 tracks2[index] = tracks[i];
2876 cluster[index]++;
2877 for (Int_t j=i+1;j<trackindex;j++){
2878 if (tracks[j]<0) continue;
2879 if (tracks[j]==tracks[i]){
2880 cluster[index]++;
2881 tracks[j]=-1;
2882 }
2883 }
2884 index++;
2885 }
2886 Int_t max=0;
2887 for (Int_t i=0;i<index;i++){
2888 if (cluster[index]>max) {
2889 sharedtrack=tracks2[index];
2890 max=cluster[index];
2891 }
2892 }
2893 }
2894 }
2895
2896 if (sharedtrack>=100000) return -1;
2897 //
2898 // make list of overlaps
2899 shared =0;
2900 for (Int_t icluster=0;icluster<6;icluster++){
2901 if (clusterlist[icluster]<0) continue;
2902 Int_t index = clusterlist[icluster];
2903 Int_t l=(index & 0xf0000000) >> 28;
2904 Int_t c=(index & 0x0fffffff) >> 00;
2905 if (c>fgLayers[l].GetNumberOfClusters()) continue;
2906 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
2907 if (l==0 || l==1){
2908 if (cl->GetNy()>2) continue;
2909 if (cl->GetNz()>2) continue;
2910 }
2911 if (l==4 || l==5){
2912 if (cl->GetNy()>3) continue;
2913 if (cl->GetNz()>3) continue;
2914 }
2915 //
2916 for (Int_t itrack=3;itrack>=0;itrack--){
2917 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2918 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
2919 overlist[l]=index;
2920 shared++;
2921 }
2922 }
2923 }
2924 return sharedtrack;
2925}
2926//------------------------------------------------------------------------
2927AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
2928 //
2929 // try to find track hypothesys without conflicts
2930 // with minimal chi2;
2931 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2932 Int_t entries1 = arr1->GetEntriesFast();
2933 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
2934 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
2935 Int_t entries2 = arr2->GetEntriesFast();
2936 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
2937 //
2938 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2939 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
2940 if (track10->Pt()>0.5+track20->Pt()) return track10;
2941
2942 for (Int_t itrack=0;itrack<entries1;itrack++){
2943 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
2944 UnRegisterClusterTracks(track,trackID1);
2945 }
2946 //
2947 for (Int_t itrack=0;itrack<entries2;itrack++){
2948 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
2949 UnRegisterClusterTracks(track,trackID2);
2950 }
2951 Int_t index1=0;
2952 Int_t index2=0;
2953 Float_t maxconflicts=6;
2954 Double_t maxchi2 =1000.;
2955 //
2956 // get weight of hypothesys - using best hypothesy
2957 Double_t w1,w2;
2958
2959 Int_t list1[6],list2[6];
2960 AliITSRecPoint *clist1[6], *clist2[6] ;
2961 RegisterClusterTracks(track10,trackID1);
2962 RegisterClusterTracks(track20,trackID2);
2963 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2964 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2965 UnRegisterClusterTracks(track10,trackID1);
2966 UnRegisterClusterTracks(track20,trackID2);
2967 //
2968 // normalized chi2
2969 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2970 Float_t nerry[6],nerrz[6];
2971 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2972 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2973 for (Int_t i=0;i<6;i++){
2974 if ( (erry1[i]>0) && (erry2[i]>0)) {
2975 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2976 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2977 }else{
2978 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2979 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2980 }
2981 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2982 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2983 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
2984 ncl1++;
2985 }
2986 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2987 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2988 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
2989 ncl2++;
2990 }
2991 }
2992 chi21/=ncl1;
2993 chi22/=ncl2;
2994 //
2995 //
2996 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2997 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
2998 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2999 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
3000 //
3001 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
3002 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
3003 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
3004 );
3005 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
3006 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
3007 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
3008 );
3009
3010 Double_t sumw = w1+w2;
3011 w1/=sumw;
3012 w2/=sumw;
3013 if (w1<w2*0.5) {
3014 w1 = (d2+0.5)/(d1+d2+1.);
3015 w2 = (d1+0.5)/(d1+d2+1.);
3016 }
3017 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
3018 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
3019 //
3020 // get pair of "best" hypothesys
3021 //
3022 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
3023 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
3024
3025 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
3026 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
3027 //if (track1->fFakeRatio>0) continue;
3028 RegisterClusterTracks(track1,trackID1);
3029 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
3030 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
3031
3032 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
3033 //if (track2->fFakeRatio>0) continue;
3034 Float_t nskipped=0;
3035 RegisterClusterTracks(track2,trackID2);
3036 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
3037 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
3038 UnRegisterClusterTracks(track2,trackID2);
3039 //
3040 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
3041 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
3042 if (nskipped>0.5) continue;
3043 //
3044 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
3045 if (conflict1+1<cconflict1) continue;
3046 if (conflict2+1<cconflict2) continue;
3047 Float_t conflict=0;
3048 Float_t sumchi2=0;
3049 Float_t sum=0;
3050 for (Int_t i=0;i<6;i++){
3051 //
3052 Float_t c1 =0.; // conflict coeficients
3053 Float_t c2 =0.;
3054 if (clist1[i]&&clist2[i]){
3055 Float_t deltan = 0;
3056 if (i<2 || i>3){
3057 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
3058 }
3059 else{
3060 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
3061 }
3062 c1 = 2./TMath::Max(3.+deltan,2.);
3063 c2 = 2./TMath::Max(3.+deltan,2.);
3064 }
3065 else{
3066 if (clist1[i]){
3067 Float_t deltan = 0;
3068 if (i<2 || i>3){
3069 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
3070 }
3071 else{
3072 deltan = (clist1[i]->GetNz()-nz1[i]);
3073 }
3074 c1 = 2./TMath::Max(3.+deltan,2.);
3075 c2 = 0;
3076 }
3077
3078 if (clist2[i]){
3079 Float_t deltan = 0;
3080 if (i<2 || i>3){
3081 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
3082 }
3083 else{
3084 deltan = (clist2[i]->GetNz()-nz2[i]);
3085 }
3086 c2 = 2./TMath::Max(3.+deltan,2.);
3087 c1 = 0;
3088 }
3089 }
3090 //
3091 chi21=0;chi22=0;
3092 if (TMath::Abs(track1->GetDy(i))>0.) {
3093 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
3094 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
3095 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
3096 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
3097 }else{
3098 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
3099 }
3100 //
3101 if (TMath::Abs(track2->GetDy(i))>0.) {
3102 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
3103 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
3104 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
3105 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
3106 }
3107 else{
3108 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
3109 }
3110 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
3111 if (chi21>0) sum+=w1;
3112 if (chi22>0) sum+=w2;
3113 conflict+=(c1+c2);
3114 }
3115 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
3116 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
3117 Double_t normchi2 = 2*conflict+sumchi2/sum;
3118 if ( normchi2 <maxchi2 ){
3119 index1 = itrack1;
3120 index2 = itrack2;
3121 maxconflicts = conflict;
3122 maxchi2 = normchi2;
3123 }
3124 }
3125 UnRegisterClusterTracks(track1,trackID1);
3126 }
3127 //
3128 // if (maxconflicts<4 && maxchi2<th0){
3129 if (maxchi2<th0*2.){
3130 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
3131 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
3132 track1->SetChi2MIP(5,maxconflicts);
3133 track1->SetChi2MIP(6,maxchi2);
3134 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
3135 // track1->UpdateESDtrack(AliESDtrack::kITSin);
3136 track1->SetChi2MIP(8,index1);
3137 fBestTrackIndex[trackID1] =index1;
3138 UpdateESDtrack(track1, AliESDtrack::kITSin);
3139 }
3140 else if (track10->GetChi2MIP(0)<th1){
3141 track10->SetChi2MIP(5,maxconflicts);
3142 track10->SetChi2MIP(6,maxchi2);
3143 // track10->UpdateESDtrack(AliESDtrack::kITSin);
3144 UpdateESDtrack(track10,AliESDtrack::kITSin);
3145 }
3146
3147 for (Int_t itrack=0;itrack<entries1;itrack++){
3148 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
3149 UnRegisterClusterTracks(track,trackID1);
3150 }
3151 //
3152 for (Int_t itrack=0;itrack<entries2;itrack++){
3153 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
3154 UnRegisterClusterTracks(track,trackID2);
3155 }
3156
3157 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3158 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3159 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3160 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3161 RegisterClusterTracks(track10,trackID1);
3162 }
3163 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3164 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3165 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3166 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3167 RegisterClusterTracks(track20,trackID2);
3168 }
3169 return track10;
3170
3171}
3172//------------------------------------------------------------------------
3173void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
3174 //--------------------------------------------------------------------
3175 // This function marks clusters assigned to the track
3176 //--------------------------------------------------------------------
3177 AliTracker::UseClusters(t,from);
3178
3179 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
3180 //if (c->GetQ()>2) c->Use();
3181 if (c->GetSigmaZ2()>0.1) c->Use();
3182 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
3183 //if (c->GetQ()>2) c->Use();
3184 if (c->GetSigmaZ2()>0.1) c->Use();
3185
3186}
3187//------------------------------------------------------------------------
3188void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
3189{
3190 //------------------------------------------------------------------
3191 // add track to the list of hypothesys
3192 //------------------------------------------------------------------
3193
3194 if (esdindex>=fTrackHypothesys.GetEntriesFast())
3195 fTrackHypothesys.Expand(TMath::Max(fTrackHypothesys.GetSize(),esdindex*2+10));
3196 //
3197 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3198 if (!array) {
3199 array = new TObjArray(10);
3200 fTrackHypothesys.AddAt(array,esdindex);
3201 }
3202 array->AddLast(track);
3203}
3204//------------------------------------------------------------------------
3205void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
3206{
3207 //-------------------------------------------------------------------
3208 // compress array of track hypothesys
3209 // keep only maxsize best hypothesys
3210 //-------------------------------------------------------------------
3211 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
3212 if (! (fTrackHypothesys.At(esdindex)) ) return;
3213 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3214 Int_t entries = array->GetEntriesFast();
3215 //
3216 //- find preliminary besttrack as a reference
3217 Float_t minchi2=10000;
3218 Int_t maxn=0;
3219 AliITStrackMI * besttrack=0;
3220 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
3221 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3222 if (!track) continue;
3223 Float_t chi2 = NormalizedChi2(track,0);
3224 //
3225 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
3226 track->SetLabel(tpcLabel);
3227 CookdEdx(track);
3228 track->SetFakeRatio(1.);
3229 CookLabel(track,0.); //For comparison only
3230 //
3231 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
3232 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3233 if (track->GetNumberOfClusters()<maxn) continue;
3234 maxn = track->GetNumberOfClusters();
3235 if (chi2<minchi2){
3236 minchi2=chi2;
3237 besttrack=track;
3238 }
3239 }
3240 else{
3241 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3242 delete array->RemoveAt(itrack);
3243 }
3244 }
3245 }
3246 if (!besttrack) return;
3247 //
3248 //
3249 //take errors of best track as a reference
3250 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
3251 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3252 for (Int_t j=0;j<6;j++) {
3253 if (besttrack->GetClIndex(j)>=0){
3254 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3255 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3256 ny[j] = besttrack->GetNy(j);
3257 nz[j] = besttrack->GetNz(j);
3258 }
3259 }
3260 //
3261 // calculate normalized chi2
3262 //
3263 Float_t * chi2 = new Float_t[entries];
3264 Int_t * index = new Int_t[entries];
3265 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3266 for (Int_t itrack=0;itrack<entries;itrack++){
3267 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3268 if (track){
3269 AliDebug(2,Form("track %d ncls %d\n",itrack,track->GetNumberOfClusters()));
3270 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
3271 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3272 chi2[itrack] = track->GetChi2MIP(0);
3273 else{
3274 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3275 delete array->RemoveAt(itrack);
3276 }
3277 }
3278 }
3279 }
3280 //
3281 TMath::Sort(entries,chi2,index,kFALSE);
3282 besttrack = (AliITStrackMI*)array->At(index[0]);
3283 if(besttrack) AliDebug(2,Form("ncls best track %d\n",besttrack->GetNumberOfClusters()));
3284 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
3285 for (Int_t j=0;j<6;j++){
3286 if (besttrack->GetClIndex(j)>=0){
3287 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3288 errz[j] = besttrack->GetSigmaZ(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3289 ny[j] = besttrack->GetNy(j);
3290 nz[j] = besttrack->GetNz(j);
3291 }
3292 }
3293 }
3294 //
3295 // calculate one more time with updated normalized errors
3296 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
3297 for (Int_t itrack=0;itrack<entries;itrack++){
3298 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3299 if (track){
3300 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3301 AliDebug(2,Form("track %d ncls %d\n",itrack,track->GetNumberOfClusters()));
3302 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
3303 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
3304 else
3305 {
3306 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3307 delete array->RemoveAt(itrack);
3308 }
3309 }
3310 }
3311 }
3312 entries = array->GetEntriesFast();
3313 //
3314 //
3315 if (entries>0){
3316 TObjArray * newarray = new TObjArray();
3317 TMath::Sort(entries,chi2,index,kFALSE);
3318 besttrack = (AliITStrackMI*)array->At(index[0]);
3319 if (besttrack){
3320 AliDebug(2,Form("ncls best track %d %f %f\n",besttrack->GetNumberOfClusters(),besttrack->GetChi2MIP(0),chi2[index[0]]));
3321 //
3322 for (Int_t j=0;j<6;j++){
3323 if (besttrack->GetNz(j)>0&&besttrack->GetNy(j)>0){
3324 erry[j] = besttrack->GetSigmaY(j); erry[j+6] = besttrack->GetSigmaY(j+6);
3325 errz[j] = besttrack->GetSigmaZ(j); errz[j+6] = besttrack->GetSigmaZ(j+6);
3326 ny[j] = besttrack->GetNy(j);
3327 nz[j] = besttrack->GetNz(j);
3328 }
3329 }
3330 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
3331 minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
3332 Float_t minn = besttrack->GetNumberOfClusters()-3;
3333 Int_t accepted=0;
3334 for (Int_t i=0;i<entries;i++){
3335 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
3336 if (!track) continue;
3337 if (accepted>maxcut) break;
3338 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3339 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3340 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
3341 delete array->RemoveAt(index[i]);
3342 continue;
3343 }
3344 }
3345 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
3346 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
3347 if (!shortbest) accepted++;
3348 //
3349 newarray->AddLast(array->RemoveAt(index[i]));
3350 for (Int_t j=0;j<6;j++){
3351 if (nz[j]==0){
3352 erry[j] = track->GetSigmaY(j); erry[j+6] = track->GetSigmaY(j+6);
3353 errz[j] = track->GetSigmaZ(j); errz[j] = track->GetSigmaZ(j+6);
3354 ny[j] = track->GetNy(j);
3355 nz[j] = track->GetNz(j);
3356 }
3357 }
3358 }
3359 else{
3360 delete array->RemoveAt(index[i]);
3361 }
3362 }
3363 array->Delete();
3364 delete fTrackHypothesys.RemoveAt(esdindex);
3365 fTrackHypothesys.AddAt(newarray,esdindex);
3366 }
3367 else{
3368 array->Delete();
3369 delete fTrackHypothesys.RemoveAt(esdindex);
3370 }
3371 }
3372 delete [] chi2;
3373 delete [] index;
3374}
3375//------------------------------------------------------------------------
3376AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
3377{
3378 //-------------------------------------------------------------
3379 // try to find best hypothesy
3380 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
3381 //-------------------------------------------------------------
3382 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
3383 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3384 if (!array) return 0;
3385 Int_t entries = array->GetEntriesFast();
3386 if (!entries) return 0;
3387 Float_t minchi2 = 100000;
3388 AliITStrackMI * besttrack=0;
3389 //
3390 AliITStrackMI * backtrack = new AliITStrackMI(*original);
3391 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
3392 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
3393 Double_t ersVtx[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
3394 //
3395 for (Int_t i=0;i<entries;i++){
3396 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3397 if (!track) continue;
3398 Float_t sigmarfi,sigmaz;
3399 GetDCASigma(track,sigmarfi,sigmaz);
3400 track->SetDnorm(0,sigmarfi);
3401 track->SetDnorm(1,sigmaz);
3402 //
3403 track->SetChi2MIP(1,1000000);
3404 track->SetChi2MIP(2,1000000);
3405 track->SetChi2MIP(3,1000000);
3406 //
3407 // backtrack
3408 backtrack = new(backtrack) AliITStrackMI(*track);
3409 if (track->GetConstrain()) {
3410 if (!CorrectForPipeMaterial(backtrack,"inward")) continue;
3411 if (!backtrack->Improve(0,xyzVtx,ersVtx)) continue;
3412 backtrack->ResetCovariance(10.);
3413 }else{
3414 backtrack->ResetCovariance(10.);
3415 }
3416 backtrack->ResetClusters();
3417
3418 Double_t x = original->GetX();
3419 if (!RefitAt(x,backtrack,track)) continue;
3420 //
3421 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
3422 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
3423 if (track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)*6.) continue;
3424 track->SetChi22(GetMatchingChi2(backtrack,original));
3425
3426 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
3427 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
3428 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
3429
3430
3431 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)) continue;
3432 //
3433 //forward track - without constraint
3434 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
3435 forwardtrack->ResetClusters();
3436 x = track->GetX();
3437 RefitAt(x,forwardtrack,track);
3438 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
3439 if (track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)*6.0) continue;
3440 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)) continue;
3441
3442 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
3443 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3444 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
3445 forwardtrack->SetD(0,track->GetD(0));
3446 forwardtrack->SetD(1,track->GetD(1));
3447 {
3448 Int_t list[6];
3449 AliITSRecPoint* clist[6];
3450 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
3451 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
3452 }
3453
3454 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
3455 if ( (track->GetChi2MIP(3)>6.*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) continue;
3456 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) {
3457 track->SetChi2MIP(3,1000);
3458 continue;
3459 }
3460 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
3461 //
3462 for (Int_t ichi=0;ichi<5;ichi++){
3463 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
3464 }
3465 if (chi2 < minchi2){
3466 //besttrack = new AliITStrackMI(*forwardtrack);
3467 besttrack = track;
3468 besttrack->SetLabel(track->GetLabel());
3469 besttrack->SetFakeRatio(track->GetFakeRatio());
3470 minchi2 = chi2;
3471 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
3472 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
3473 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
3474 }
3475 }
3476 delete backtrack;
3477 delete forwardtrack;
3478 Int_t accepted=0;
3479 for (Int_t i=0;i<entries;i++){
3480 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3481
3482 if (!track) continue;
3483
3484 if (accepted>checkmax || track->GetChi2MIP(3)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)*6. ||
3485 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
3486 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
3487 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3488 delete array->RemoveAt(i);
3489 continue;
3490 }
3491 }
3492 else{
3493 accepted++;
3494 }
3495 }
3496 //
3497 array->Compress();
3498 SortTrackHypothesys(esdindex,checkmax,1);
3499
3500 array = (TObjArray*) fTrackHypothesys.At(esdindex);
3501 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
3502 besttrack = (AliITStrackMI*)array->At(0);
3503 if (!besttrack) return 0;
3504 besttrack->SetChi2MIP(8,0);
3505 fBestTrackIndex[esdindex]=0;
3506 entries = array->GetEntriesFast();
3507 AliITStrackMI *longtrack =0;
3508 minchi2 =1000;
3509 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
3510 for (Int_t itrack=entries-1;itrack>0;itrack--) {
3511 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
3512 if (!track->GetConstrain()) continue;
3513 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3514 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
3515 if (track->GetChi2MIP(0)>4.) continue;
3516 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
3517 longtrack =track;
3518 }
3519 //if (longtrack) besttrack=longtrack;
3520
3521 Int_t list[6];
3522 AliITSRecPoint * clist[6];
3523 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3524 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&besttrack->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3525 &&besttrack->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&besttrack->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
3526 RegisterClusterTracks(besttrack,esdindex);
3527 }
3528 //
3529 //
3530 if (shared>0.0){
3531 Int_t nshared;
3532 Int_t overlist[6];
3533 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
3534 if (sharedtrack>=0){
3535 //
3536 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
3537 if (besttrack){
3538 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3539 }
3540 else return 0;
3541 }
3542 }
3543
3544 if (shared>2.5) return 0;
3545 if (shared>1.0) return besttrack;
3546 //
3547 // Don't sign clusters if not gold track
3548 //
3549 if (!besttrack->IsGoldPrimary()) return besttrack;
3550 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
3551 //
3552 if (fConstraint[fPass]){
3553 //
3554 // sign clusters
3555 //
3556 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3557 for (Int_t i=0;i<6;i++){
3558 Int_t index = besttrack->GetClIndex(i);
3559 if (index<0) continue;
3560 Int_t ilayer = (index & 0xf0000000) >> 28;
3561 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
3562 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
3563 if (!c) continue;
3564 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3565 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3566 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
3567 if ( ilayer>2&& AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(ilayer))
3568 if (besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
3569 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3570
3571 Bool_t cansign = kTRUE;
3572 for (Int_t itrack=0;itrack<entries; itrack++){
3573 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
3574 if (!track) continue;
3575 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3576 if ( (track->GetClIndex(ilayer)>=0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
3577 cansign = kFALSE;
3578 break;
3579 }
3580 }
3581 if (cansign){
3582 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3583 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
3584 if (!c->IsUsed()) c->Use();
3585 }
3586 }
3587 }
3588 return besttrack;
3589}
3590//------------------------------------------------------------------------
3591void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3592{
3593 //
3594 // get "best" hypothesys
3595 //
3596
3597 Int_t nentries = itsTracks.GetEntriesFast();
3598 for (Int_t i=0;i<nentries;i++){
3599 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
3600 if (!track) continue;
3601 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3602 if (!array) continue;
3603 if (array->GetEntriesFast()<=0) continue;
3604 //
3605 AliITStrackMI* longtrack=0;
3606 Float_t minn=0;
3607 Float_t maxchi2=1000;
3608 for (Int_t j=0;j<array->GetEntriesFast();j++){
3609 AliITStrackMI* trackHyp = (AliITStrackMI*)array->At(j);
3610 if (!trackHyp) continue;
3611 if (trackHyp->GetGoldV0()) {
3612 longtrack = trackHyp; //gold V0 track taken
3613 break;
3614 }
3615 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()<minn) continue;
3616 Float_t chi2 = trackHyp->GetChi2MIP(0);
3617 if (fAfterV0){
3618 if (!trackHyp->GetGoldV0()&&trackHyp->GetConstrain()==kFALSE) chi2+=5;
3619 }
3620 if (trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone()>minn) maxchi2 = trackHyp->GetChi2MIP(0);
3621 //
3622 if (chi2 > maxchi2) continue;
3623 minn= trackHyp->GetNumberOfClusters()+trackHyp->GetNDeadZone();
3624 maxchi2 = chi2;
3625 longtrack=trackHyp;
3626 }
3627 //
3628 //
3629 //
3630 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
3631 if (!longtrack) {longtrack = besttrack;}
3632 else besttrack= longtrack;
3633 //
3634 if (besttrack) {
3635 Int_t list[6];
3636 AliITSRecPoint * clist[6];
3637 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3638 //
3639 track->SetNUsed(shared);
3640 track->SetNSkipped(besttrack->GetNSkipped());
3641 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
3642 if (shared>0) {
3643 if(!AliITSReconstructor::GetRecoParam()->GetAllowSharedClusters()) continue;
3644 Int_t nshared;
3645 Int_t overlist[6];
3646 //
3647 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3648 //if (sharedtrack==-1) sharedtrack=0;
3649 if (sharedtrack>=0) {
3650 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3651 }
3652 }
3653 if (besttrack&&fAfterV0) {
3654 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3655 }
3656 if (besttrack&&fConstraint[fPass])
3657 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3658 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5 && fConstraint[fPass]) {
3659 if ( TMath::Abs(besttrack->GetD(0))>0.1 ||
3660 TMath::Abs(besttrack->GetD(1))>0.1 ) track->SetReconstructed(kFALSE);
3661 }
3662
3663 }
3664 }
3665}
3666//------------------------------------------------------------------------
3667void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
3668 //--------------------------------------------------------------------
3669 //This function "cooks" a track label. If label<0, this track is fake.
3670 //--------------------------------------------------------------------
3671 Int_t tpcLabel=-1;
3672
3673 if (track->GetESDtrack()){
3674 tpcLabel = track->GetESDtrack()->GetTPCLabel();
3675 ULong_t trStatus=track->GetESDtrack()->GetStatus();
3676 if(!(trStatus&AliESDtrack::kTPCin)) tpcLabel=track->GetLabel(); // for ITSsa tracks
3677 }
3678 track->SetChi2MIP(9,0);
3679 Int_t nwrong=0;
3680 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3681 Int_t cindex = track->GetClusterIndex(i);
3682 Int_t l=(cindex & 0xf0000000) >> 28;
3683 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3684 Int_t isWrong=1;
3685 for (Int_t ind=0;ind<3;ind++){
3686 if (cl->GetLabel(ind)==TMath::Abs(tpcLabel)) isWrong=0;
3687 //AliDebug(2,Form("icl %d ilab %d lab %d",i,ind,cl->GetLabel(ind)));
3688 }
3689 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3690 nwrong+=isWrong;
3691 }
3692 Int_t nclusters = track->GetNumberOfClusters();
3693 if (nclusters > 0) //PH Some tracks don't have any cluster
3694 track->SetFakeRatio(double(nwrong)/double(nclusters));
3695 if (tpcLabel>0 && track->GetFakeRatio()>wrong) {
3696 track->SetLabel(-tpcLabel);
3697 } else {
3698 track->SetLabel(tpcLabel);
3699 }
3700 AliDebug(2,Form(" nls %d wrong %d label %d tpcLabel %d\n",nclusters,nwrong,track->GetLabel(),tpcLabel));
3701
3702}
3703//------------------------------------------------------------------------
3704void AliITStrackerMI::CookdEdx(AliITStrackMI* track){
3705 //
3706 // Fill the dE/dx in this track
3707 //
3708 track->SetChi2MIP(9,0);
3709 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3710 Int_t cindex = track->GetClusterIndex(i);
3711 Int_t l=(cindex & 0xf0000000) >> 28;
3712 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
3713 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
3714 Int_t isWrong=1;
3715 for (Int_t ind=0;ind<3;ind++){
3716 if (cl->GetLabel(ind)==lab) isWrong=0;
3717 }
3718 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
3719 }
3720 Double_t low=0.;
3721 Double_t up=0.51;
3722 track->CookdEdx(low,up);
3723}
3724//------------------------------------------------------------------------
3725void AliITStrackerMI::MakeCoefficients(Int_t ntracks){
3726 //
3727 // Create some arrays
3728 //
3729 if (fCoefficients) delete []fCoefficients;
3730 fCoefficients = new Float_t[ntracks*48];
3731 for (Int_t i=0;i<ntracks*48;i++) fCoefficients[i]=-1.;
3732}
3733//------------------------------------------------------------------------
3734Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
3735{
3736 //
3737 // Compute predicted chi2
3738 //
3739 Float_t erry,errz,covyz;
3740 Float_t theta = track->GetTgl();
3741 Float_t phi = track->GetSnp();
3742 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
3743 AliITSClusterParam::GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz,covyz);
3744 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()));
3745 // Take into account the mis-alignment (bring track to cluster plane)
3746 Double_t xTrOrig=track->GetX();
3747 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
3748 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()));
3749 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz,covyz);
3750 // Bring the track back to detector plane in ideal geometry
3751 // [mis-alignment will be accounted for in UpdateMI()]
3752 if (!track->Propagate(xTrOrig)) return 1000.;
3753 Float_t ny,nz;
3754 AliITSClusterParam::GetNTeor(layer,cluster,theta,phi,ny,nz);
3755 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3756 if (delta>1){
3757 chi2+=0.5*TMath::Min(delta/2,2.);
3758 chi2+=2.*cluster->GetDeltaProbability();
3759 }
3760 //
3761 track->SetNy(layer,ny);
3762 track->SetNz(layer,nz);
3763 track->SetSigmaY(layer,erry);
3764 track->SetSigmaZ(layer, errz);
3765 track->SetSigmaYZ(layer,covyz);
3766 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
3767 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
3768 return chi2;
3769
3770}
3771//------------------------------------------------------------------------
3772Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
3773{
3774 //
3775 // Update ITS track
3776 //
3777 Int_t layer = (index & 0xf0000000) >> 28;
3778 track->SetClIndex(layer, index);
3779 if (layer>1&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(layer)) {
3780 if (track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3781 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3782 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3783 }
3784 }
3785
3786 if (TMath::Abs(cl->GetQ())<1.e-13) return 0; // ingore the "virtual" clusters
3787
3788
3789 // Take into account the mis-alignment (bring track to cluster plane)
3790 Double_t xTrOrig=track->GetX();
3791 Float_t clxyz[3]; cl->GetGlobalXYZ(clxyz);Double_t trxyz[3]; track->GetXYZ(trxyz);
3792 AliDebug(2,Form("gtr %f %f %f",trxyz[0],trxyz[1],trxyz[2]));
3793 AliDebug(2,Form("gcl %f %f %f",clxyz[0],clxyz[1],clxyz[2]));
3794 AliDebug(2,Form(" xtr %f xcl %f",track->GetX(),cl->GetX()));
3795
3796 if (!track->Propagate(xTrOrig+cl->GetX())) return 0;
3797
3798 AliCluster c(*cl);
3799 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
3800 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
3801 c.SetSigmaYZ(track->GetSigmaYZ(layer));
3802
3803
3804 Int_t updated = track->UpdateMI(&c,chi2,index);
3805 // Bring the track back to detector plane in ideal geometry
3806 if (!track->Propagate(xTrOrig)) return 0;
3807
3808 if(!updated) AliDebug(2,"update failed");
3809 return updated;
3810}
3811
3812//------------------------------------------------------------------------
3813void AliITStrackerMI::GetDCASigma(const AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
3814{
3815 //
3816 //DCA sigmas parameterization
3817 //to be paramterized using external parameters in future
3818 //
3819 //
3820 sigmarfi = 0.0040+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3821 sigmaz = 0.0110+4.37*TMath::Abs(track->GetC());
3822}
3823//------------------------------------------------------------------------
3824void AliITStrackerMI::SignDeltas(const TObjArray *clusterArray, Float_t vz)
3825{
3826 //
3827 // Clusters from delta electrons?
3828 //
3829 Int_t entries = clusterArray->GetEntriesFast();
3830 if (entries<4) return;
3831 AliITSRecPoint* cluster = (AliITSRecPoint*)clusterArray->At(0);
3832 Int_t layer = cluster->GetLayer();
3833 if (layer>1) return;
3834 Int_t index[10000];
3835 Int_t ncandidates=0;
3836 Float_t r = (layer>0)? 7:4;
3837 //
3838 for (Int_t i=0;i<entries;i++){
3839 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(i);
3840 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3841 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3842 index[ncandidates] = i; //candidate to belong to delta electron track
3843 ncandidates++;
3844 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3845 cl0->SetDeltaProbability(1);
3846 }
3847 }
3848 //
3849 //
3850 //
3851 for (Int_t i=0;i<ncandidates;i++){
3852 AliITSRecPoint* cl0 = (AliITSRecPoint*)clusterArray->At(index[i]);
3853 if (cl0->GetDeltaProbability()>0.8) continue;
3854 //
3855 Int_t ncl = 0;
3856 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3857 sumy=sumz=sumy2=sumyz=sumw=0.0;
3858 for (Int_t j=0;j<ncandidates;j++){
3859 if (i==j) continue;
3860 AliITSRecPoint* cl1 = (AliITSRecPoint*)clusterArray->At(index[j]);
3861 //
3862 Float_t dz = cl0->GetZ()-cl1->GetZ();
3863 Float_t dy = cl0->GetY()-cl1->GetY();
3864 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3865 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3866 y[ncl] = cl1->GetY();
3867 z[ncl] = cl1->GetZ();
3868 sumy+= y[ncl]*weight;
3869 sumz+= z[ncl]*weight;
3870 sumy2+=y[ncl]*y[ncl]*weight;
3871 sumyz+=y[ncl]*z[ncl]*weight;
3872 sumw+=weight;
3873 ncl++;
3874 }
3875 }
3876 if (ncl<4) continue;
3877 Float_t det = sumw*sumy2 - sumy*sumy;
3878 Float_t delta=1000;
3879 if (TMath::Abs(det)>0.01){
3880 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3881 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3882 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3883 }
3884 else{
3885 Float_t z0 = sumyz/sumy;
3886 delta = TMath::Abs(cl0->GetZ()-z0);
3887 }
3888 if ( delta<0.05) {
3889 cl0->SetDeltaProbability(1-20.*delta);
3890 }
3891 }
3892}
3893//------------------------------------------------------------------------
3894void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
3895{
3896 //
3897 // Update ESD track
3898 //
3899 track->UpdateESDtrack(flags);
3900 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
3901 if (oldtrack) delete oldtrack;
3902 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3903 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
3904 printf("Problem\n");
3905 }
3906}
3907//------------------------------------------------------------------------
3908Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3909 //
3910 // Get nearest upper layer close to the point xr.
3911 // rough approximation
3912 //
3913 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
3914 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3915 Int_t res =6;
3916 for (Int_t i=0;i<6;i++){
3917 if (radius<kRadiuses[i]){
3918 res =i;
3919 break;
3920 }
3921 }
3922 return res;
3923}
3924//------------------------------------------------------------------------
3925void AliITStrackerMI::BuildMaterialLUT(TString material) {
3926 //--------------------------------------------------------------------
3927 // Fill a look-up table with mean material
3928 //--------------------------------------------------------------------
3929
3930 Int_t n=1000;
3931 Double_t mparam[7];
3932 Double_t point1[3],point2[3];
3933 Double_t phi,cosphi,sinphi,z;
3934 // 0-5 layers, 6 pipe, 7-8 shields
3935 Double_t rmin[9]={ 3.5, 5.5,13.0,22.0,35.0,41.0, 2.0, 8.0,25.0};
3936 Double_t rmax[9]={ 5.5, 8.0,17.0,26.0,41.0,47.0, 3.0,10.5,30.0};
3937
3938 Int_t ifirst=0,ilast=0;
3939 if(material.Contains("Pipe")) {
3940 ifirst=6; ilast=6;
3941 } else if(material.Contains("Shields")) {
3942 ifirst=7; ilast=8;
3943 } else if(material.Contains("Layers")) {
3944 ifirst=0; ilast=5;
3945 } else {
3946 Error("BuildMaterialLUT","Wrong layer name\n");
3947 }
3948
3949 for(Int_t imat=ifirst; imat<=ilast; imat++) {
3950 Double_t param[5]={0.,0.,0.,0.,0.};
3951 for (Int_t i=0; i<n; i++) {
3952 phi = 2.*TMath::Pi()*gRandom->Rndm();
3953 cosphi = TMath::Cos(phi); sinphi = TMath::Sin(phi);
3954 z = 14.*(-1.+2.*gRandom->Rndm()); // SPD barrel
3955 point1[0] = rmin[imat]*cosphi;
3956 point1[1] = rmin[imat]*sinphi;
3957 point1[2] = z;
3958 point2[0] = rmax[imat]*cosphi;
3959 point2[1] = rmax[imat]*sinphi;
3960 point2[2] = z;
3961 AliTracker::MeanMaterialBudget(point1,point2,mparam);
3962 for(Int_t j=0;j<5;j++) param[j]+=mparam[j];
3963 }
3964 for(Int_t j=0;j<5;j++) param[j]/=(Float_t)n;
3965 if(imat<=5) {
3966 fxOverX0Layer[imat] = param[1];
3967 fxTimesRhoLayer[imat] = param[0]*param[4];
3968 } else if(imat==6) {
3969 fxOverX0Pipe = param[1];
3970 fxTimesRhoPipe = param[0]*param[4];
3971 } else if(imat==7) {
3972 fxOverX0Shield[0] = param[1];
3973 fxTimesRhoShield[0] = param[0]*param[4];
3974 } else if(imat==8) {
3975 fxOverX0Shield[1] = param[1];
3976 fxTimesRhoShield[1] = param[0]*param[4];
3977 }
3978 }
3979 /*
3980 printf("%s\n",material.Data());
3981 printf("%f %f\n",fxOverX0Pipe,fxTimesRhoPipe);
3982 printf("%f %f\n",fxOverX0Shield[0],fxTimesRhoShield[0]);
3983 printf("%f %f\n",fxOverX0Shield[1],fxTimesRhoShield[1]);
3984 printf("%f %f\n",fxOverX0Layer[0],fxTimesRhoLayer[0]);
3985 printf("%f %f\n",fxOverX0Layer[1],fxTimesRhoLayer[1]);
3986 printf("%f %f\n",fxOverX0Layer[2],fxTimesRhoLayer[2]);
3987 printf("%f %f\n",fxOverX0Layer[3],fxTimesRhoLayer[3]);
3988 printf("%f %f\n",fxOverX0Layer[4],fxTimesRhoLayer[4]);
3989 printf("%f %f\n",fxOverX0Layer[5],fxTimesRhoLayer[5]);
3990 */
3991 return;
3992}
3993//------------------------------------------------------------------------
3994Int_t AliITStrackerMI::CorrectForPipeMaterial(AliITStrackMI *t,
3995 TString direction) {
3996 //-------------------------------------------------------------------
3997 // Propagate beyond beam pipe and correct for material
3998 // (material budget in different ways according to fUseTGeo value)
3999 // Add time if going outward (PropagateTo or PropagateToTGeo)
4000 //-------------------------------------------------------------------
4001
4002 // Define budget mode:
4003 // 0: material from AliITSRecoParam (hard coded)
4004 // 1: material from TGeo in one step (on the fly)
4005 // 2: material from lut
4006 // 3: material from TGeo in one step (same for all hypotheses)
4007 Int_t mode;
4008 switch(fUseTGeo) {
4009 case 0:
4010 mode=0;
4011 break;
4012 case 1:
4013 mode=1;
4014 break;
4015 case 2:
4016 mode=2;
4017 break;
4018 case 3:
4019 if(fTrackingPhase.Contains("Clusters2Tracks"))
4020 { mode=3; } else { mode=1; }
4021 break;
4022 case 4:
4023 if(fTrackingPhase.Contains("Clusters2Tracks"))
4024 { mode=3; } else { mode=2; }
4025 break;
4026 default:
4027 mode=0;
4028 break;
4029 }
4030 if(fTrackingPhase.Contains("Default")) mode=0;
4031
4032 Int_t index=fCurrentEsdTrack;
4033
4034 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4035 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
4036 Double_t xToGo;
4037 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4038
4039 Double_t xOverX0,x0,lengthTimesMeanDensity;
4040
4041 switch(mode) {
4042 case 0:
4043 xOverX0 = AliITSRecoParam::GetdPipe();
4044 x0 = AliITSRecoParam::GetX0Be();
4045 lengthTimesMeanDensity = xOverX0*x0;
4046 lengthTimesMeanDensity *= dir;
4047 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4048 break;
4049 case 1:
4050 if (!t->PropagateToTGeo(xToGo,1)) return 0;
4051 break;
4052 case 2:
4053 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
4054 xOverX0 = fxOverX0Pipe;
4055 lengthTimesMeanDensity = fxTimesRhoPipe;
4056 lengthTimesMeanDensity *= dir;
4057 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4058 break;
4059 case 3:
4060 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
4061 if(fxOverX0PipeTrks[index]<0) {
4062 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4063 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4064 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4065 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
4066 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4067 return 1;
4068 }
4069 xOverX0 = fxOverX0PipeTrks[index];
4070 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
4071 lengthTimesMeanDensity *= dir;
4072 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4073 break;
4074 }
4075
4076 return 1;
4077}
4078//------------------------------------------------------------------------
4079Int_t AliITStrackerMI::CorrectForShieldMaterial(AliITStrackMI *t,
4080 TString shield,
4081 TString direction) {
4082 //-------------------------------------------------------------------
4083 // Propagate beyond SPD or SDD shield and correct for material
4084 // (material budget in different ways according to fUseTGeo value)
4085 // Add time if going outward (PropagateTo or PropagateToTGeo)
4086 //-------------------------------------------------------------------
4087
4088 // Define budget mode:
4089 // 0: material from AliITSRecoParam (hard coded)
4090 // 1: material from TGeo in steps of X cm (on the fly)
4091 // X = AliITSRecoParam::GetStepSizeTGeo()
4092 // 2: material from lut
4093 // 3: material from TGeo in one step (same for all hypotheses)
4094 Int_t mode;
4095 switch(fUseTGeo) {
4096 case 0:
4097 mode=0;
4098 break;
4099 case 1:
4100 mode=1;
4101 break;
4102 case 2:
4103 mode=2;
4104 break;
4105 case 3:
4106 if(fTrackingPhase.Contains("Clusters2Tracks"))
4107 { mode=3; } else { mode=1; }
4108 break;
4109 case 4:
4110 if(fTrackingPhase.Contains("Clusters2Tracks"))
4111 { mode=3; } else { mode=2; }
4112 break;
4113 default:
4114 mode=0;
4115 break;
4116 }
4117 if(fTrackingPhase.Contains("Default")) mode=0;
4118
4119 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4120 Double_t rToGo;
4121 Int_t shieldindex=0;
4122 if (shield.Contains("SDD")) { // SDDouter
4123 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(1) : AliITSRecoParam::GetrOutsideShield(1));
4124 shieldindex=1;
4125 } else if (shield.Contains("SPD")) { // SPDouter
4126 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(0) : AliITSRecoParam::GetrOutsideShield(0));
4127 shieldindex=0;
4128 } else {
4129 Error("CorrectForShieldMaterial"," Wrong shield name\n");
4130 return 0;
4131 }
4132
4133 // do nothing if we are already beyond the shield
4134 Double_t rTrack = TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY());
4135 if(dir<0 && rTrack > rToGo) return 1; // going outward
4136 if(dir>0 && rTrack < rToGo) return 1; // going inward
4137
4138
4139 Double_t xToGo;
4140 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4141
4142 Int_t index=2*fCurrentEsdTrack+shieldindex;
4143
4144 Double_t xOverX0,x0,lengthTimesMeanDensity;
4145 Int_t nsteps=1;
4146
4147 switch(mode) {
4148 case 0:
4149 xOverX0 = AliITSRecoParam::Getdshield(shieldindex);
4150 x0 = AliITSRecoParam::GetX0shield(shieldindex);
4151 lengthTimesMeanDensity = xOverX0*x0;
4152 lengthTimesMeanDensity *= dir;
4153 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4154 break;
4155 case 1:
4156 nsteps= (Int_t)(TMath::Abs(t->GetX()-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4157 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4158 break;
4159 case 2:
4160 if(fxOverX0Shield[shieldindex]<0) BuildMaterialLUT("Shields");
4161 xOverX0 = fxOverX0Shield[shieldindex];
4162 lengthTimesMeanDensity = fxTimesRhoShield[shieldindex];
4163 lengthTimesMeanDensity *= dir;
4164 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4165 break;
4166 case 3:
4167 if(!fxOverX0ShieldTrks || index<0 || index>=2*fNtracks) Error("CorrectForShieldMaterial","Incorrect usage of UseTGeo option!\n");
4168 if(fxOverX0ShieldTrks[index]<0) {
4169 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4170 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4171 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4172 fxOverX0ShieldTrks[index] = TMath::Abs(xOverX0)/angle;
4173 fxTimesRhoShieldTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4174 return 1;
4175 }
4176 xOverX0 = fxOverX0ShieldTrks[index];
4177 lengthTimesMeanDensity = fxTimesRhoShieldTrks[index];
4178 lengthTimesMeanDensity *= dir;
4179 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4180 break;
4181 }
4182
4183 return 1;
4184}
4185//------------------------------------------------------------------------
4186Int_t AliITStrackerMI::CorrectForLayerMaterial(AliITStrackMI *t,
4187 Int_t layerindex,
4188 Double_t oldGlobXYZ[3],
4189 TString direction) {
4190 //-------------------------------------------------------------------
4191 // Propagate beyond layer and correct for material
4192 // (material budget in different ways according to fUseTGeo value)
4193 // Add time if going outward (PropagateTo or PropagateToTGeo)
4194 //-------------------------------------------------------------------
4195
4196 // Define budget mode:
4197 // 0: material from AliITSRecoParam (hard coded)
4198 // 1: material from TGeo in stepsof X cm (on the fly)
4199 // X = AliITSRecoParam::GetStepSizeTGeo()
4200 // 2: material from lut
4201 // 3: material from TGeo in one step (same for all hypotheses)
4202 Int_t mode;
4203 switch(fUseTGeo) {
4204 case 0:
4205 mode=0;
4206 break;
4207 case 1:
4208 mode=1;
4209 break;
4210 case 2:
4211 mode=2;
4212 break;
4213 case 3:
4214 if(fTrackingPhase.Contains("Clusters2Tracks"))
4215 { mode=3; } else { mode=1; }
4216 break;
4217 case 4:
4218 if(fTrackingPhase.Contains("Clusters2Tracks"))
4219 { mode=3; } else { mode=2; }
4220 break;
4221 default:
4222 mode=0;
4223 break;
4224 }
4225 if(fTrackingPhase.Contains("Default")) mode=0;
4226
4227 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4228
4229 Double_t r=fgLayers[layerindex].GetR();
4230 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
4231
4232 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
4233 Double_t xToGo;
4234 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
4235
4236 Int_t index=6*fCurrentEsdTrack+layerindex;
4237
4238
4239 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
4240 Int_t nsteps=1;
4241
4242 // back before material (no correction)
4243 Double_t rOld,xOld;
4244 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
4245 if (!t->GetLocalXat(rOld,xOld)) return 0;
4246 if (!t->Propagate(xOld)) return 0;
4247
4248 switch(mode) {
4249 case 0:
4250 xOverX0 = fgLayers[layerindex].GetThickness(t->GetY(),t->GetZ(),x0);
4251 lengthTimesMeanDensity = xOverX0*x0;
4252 lengthTimesMeanDensity *= dir;
4253 // Bring the track beyond the material
4254 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4255 break;
4256 case 1:
4257 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4258 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
4259 break;
4260 case 2:
4261 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
4262 xOverX0 = fxOverX0Layer[layerindex];
4263 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
4264 lengthTimesMeanDensity *= dir;
4265 // Bring the track beyond the material
4266 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4267 break;
4268 case 3:
4269 if(!fxOverX0LayerTrks || index<0 || index>=6*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
4270 if(fxOverX0LayerTrks[index]<0) {
4271 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
4272 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
4273 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4274 ((1.-t->GetSnp())*(1.+t->GetSnp())));
4275 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
4276 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4277 return 1;
4278 }
4279 xOverX0 = fxOverX0LayerTrks[index];
4280 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
4281 lengthTimesMeanDensity *= dir;
4282 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
4283 break;
4284 }
4285
4286
4287 return 1;
4288}
4289//------------------------------------------------------------------------
4290void AliITStrackerMI::MakeTrksMaterialLUT(Int_t ntracks) {
4291 //-----------------------------------------------------------------
4292 // Initialize LUT for storing material for each prolonged track
4293 //-----------------------------------------------------------------
4294 fxOverX0PipeTrks = new Float_t[ntracks];
4295 fxTimesRhoPipeTrks = new Float_t[ntracks];
4296 fxOverX0ShieldTrks = new Float_t[ntracks*2];
4297 fxTimesRhoShieldTrks = new Float_t[ntracks*2];
4298 fxOverX0LayerTrks = new Float_t[ntracks*6];
4299 fxTimesRhoLayerTrks = new Float_t[ntracks*6];
4300
4301 for(Int_t i=0; i<ntracks; i++) {
4302 fxOverX0PipeTrks[i] = -1.;
4303 fxTimesRhoPipeTrks[i] = -1.;
4304 }
4305 for(Int_t j=0; j<ntracks*2; j++) {
4306 fxOverX0ShieldTrks[j] = -1.;
4307 fxTimesRhoShieldTrks[j] = -1.;
4308 }
4309 for(Int_t k=0; k<ntracks*6; k++) {
4310 fxOverX0LayerTrks[k] = -1.;
4311 fxTimesRhoLayerTrks[k] = -1.;
4312 }
4313
4314 fNtracks = ntracks;
4315
4316 return;
4317}
4318//------------------------------------------------------------------------
4319void AliITStrackerMI::DeleteTrksMaterialLUT() {
4320 //-----------------------------------------------------------------
4321 // Delete LUT for storing material for each prolonged track
4322 //-----------------------------------------------------------------
4323 if(fxOverX0PipeTrks) {
4324 delete [] fxOverX0PipeTrks; fxOverX0PipeTrks = 0;
4325 }
4326 if(fxOverX0ShieldTrks) {
4327 delete [] fxOverX0ShieldTrks; fxOverX0ShieldTrks = 0;
4328 }
4329
4330 if(fxOverX0LayerTrks) {
4331 delete [] fxOverX0LayerTrks; fxOverX0LayerTrks = 0;
4332 }
4333 if(fxTimesRhoPipeTrks) {
4334 delete [] fxTimesRhoPipeTrks; fxTimesRhoPipeTrks = 0;
4335 }
4336 if(fxTimesRhoShieldTrks) {
4337 delete [] fxTimesRhoShieldTrks; fxTimesRhoShieldTrks = 0;
4338 }
4339 if(fxTimesRhoLayerTrks) {
4340 delete [] fxTimesRhoLayerTrks; fxTimesRhoLayerTrks = 0;
4341 }
4342 return;
4343}
4344//------------------------------------------------------------------------
4345void AliITStrackerMI::SetForceSkippingOfLayer() {
4346 //-----------------------------------------------------------------
4347 // Check if we are forced to skip layers
4348 // either we set to skip them in RecoParam
4349 // or they were off during data-taking
4350 //-----------------------------------------------------------------
4351
4352 const AliEventInfo *eventInfo = GetEventInfo();
4353
4354 for(Int_t l=0; l<AliITSgeomTGeo::kNLayers; l++) {
4355 fForceSkippingOfLayer[l] = 0;
4356 // check reco param
4357 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(l)) fForceSkippingOfLayer[l] = 1;
4358 // check run info
4359
4360 if(eventInfo &&
4361 AliITSReconstructor::GetRecoParam()->GetSkipSubdetsNotInTriggerCluster()) {
4362 AliDebug(2,Form("GetEventInfo->GetTriggerCluster: %s",eventInfo->GetTriggerCluster()));
4363 if(l==0 || l==1) {
4364 if(!strstr(eventInfo->GetTriggerCluster(),"ITSSPD")) fForceSkippingOfLayer[l] = 1;
4365 } else if(l==2 || l==3) {
4366 if(!strstr(eventInfo->GetTriggerCluster(),"ITSSDD")) fForceSkippingOfLayer[l] = 1;
4367 } else {
4368 if(!strstr(eventInfo->GetTriggerCluster(),"ITSSSD")) fForceSkippingOfLayer[l] = 1;
4369 }
4370 }
4371 }
4372 return;
4373}
4374//------------------------------------------------------------------------
4375Int_t AliITStrackerMI::CheckSkipLayer(const AliITStrackMI *track,
4376 Int_t ilayer,Int_t idet) const {
4377 //-----------------------------------------------------------------
4378 // This method is used to decide whether to allow a prolongation
4379 // without clusters, because we want to skip the layer.
4380 // In this case the return value is > 0:
4381 // return 1: the user requested to skip a layer
4382 // return 2: track outside z acceptance
4383 //-----------------------------------------------------------------
4384
4385 if (ForceSkippingOfLayer(ilayer)) return 1;
4386
4387 Int_t innerLayCanSkip=0; // was 2, changed on 05.11.2009
4388
4389 if (idet<0 && // out in z
4390 ilayer>innerLayCanSkip &&
4391 AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance()) {
4392 // check if track will cross SPD outer layer
4393 Double_t phiAtSPD2,zAtSPD2;
4394 if (track->GetPhiZat(fgLayers[1].GetR(),phiAtSPD2,zAtSPD2)) {
4395 if (TMath::Abs(zAtSPD2)<2.*AliITSRecoParam::GetSPDdetzlength()) return 2;
4396 }
4397 return 2; // always allow skipping, changed on 05.11.2009
4398 }
4399
4400 return 0;
4401}
4402//------------------------------------------------------------------------
4403Int_t AliITStrackerMI::CheckDeadZone(AliITStrackMI *track,
4404 Int_t ilayer,Int_t idet,
4405 Double_t dz,Double_t dy,
4406 Bool_t noClusters) const {
4407 //-----------------------------------------------------------------
4408 // This method is used to decide whether to allow a prolongation
4409 // without clusters, because there is a dead zone in the road.
4410 // In this case the return value is > 0:
4411 // return 1: dead zone at z=0,+-7cm in SPD
4412 // This method assumes that fSPDdetzcentre is ordered from -z to +z
4413 // return 2: all road is "bad" (dead or noisy) from the OCDB
4414 // return 3: at least a chip is "bad" (dead or noisy) from the OCDB
4415 // return 4: at least a single channel is "bad" (dead or noisy) from the OCDB
4416 //-----------------------------------------------------------------
4417
4418 // check dead zones at z=0,+-7cm in the SPD
4419 if (ilayer<2 && !AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
4420 Double_t zmindead[3]={fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
4421 fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
4422 fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength()};
4423 Double_t zmaxdead[3]={fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
4424 fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
4425 fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength()};
4426 for (Int_t i=0; i<3; i++)
4427 if (track->GetZ()-dz<zmaxdead[i] && track->GetZ()+dz>zmindead[i]) {
4428 AliDebug(2,Form("crack SPD %d track z %f %f %f %f\n",ilayer,track->GetZ(),dz,zmaxdead[i],zmindead[i]));
4429 if (GetSPDDeadZoneProbability(track->GetZ(),TMath::Sqrt(track->GetSigmaZ2()))>0.1) return 1;
4430 }
4431 }
4432
4433 // check bad zones from OCDB
4434 if (!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return 0;
4435
4436 if (idet<0) return 0;
4437
4438 AliITSdetector &det=fgLayers[ilayer].GetDetector(idet);
4439
4440 Int_t detType=-1;
4441 Float_t detSizeFactorX=0.0001,detSizeFactorZ=0.0001;
4442 if (ilayer==0 || ilayer==1) { // ---------- SPD
4443 detType = 0;
4444 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
4445 detType = 1;
4446 detSizeFactorX *= 2.;
4447 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
4448 detType = 2;
4449 }
4450 AliITSsegmentation *segm = (AliITSsegmentation*)fkDetTypeRec->GetSegmentationModel(detType);
4451 if (detType==2) segm->SetLayer(ilayer+1);
4452 Float_t detSizeX = detSizeFactorX*segm->Dx();
4453 Float_t detSizeZ = detSizeFactorZ*segm->Dz();
4454
4455 // check if the road overlaps with bad chips
4456 Float_t xloc,zloc;
4457 LocalModuleCoord(ilayer,idet,track,xloc,zloc);
4458 Float_t zlocmin = zloc-dz;
4459 Float_t zlocmax = zloc+dz;
4460 Float_t xlocmin = xloc-dy;
4461 Float_t xlocmax = xloc+dy;
4462 Int_t chipsInRoad[100];
4463
4464 // check if road goes out of detector
4465 Bool_t touchNeighbourDet=kFALSE;
4466 if (TMath::Abs(xlocmin)>0.5*detSizeX) {xlocmin=-0.4999*detSizeX; touchNeighbourDet=kTRUE;}
4467 if (TMath::Abs(xlocmax)>0.5*detSizeX) {xlocmax=+0.4999*detSizeX; touchNeighbourDet=kTRUE;}
4468 if (TMath::Abs(zlocmin)>0.5*detSizeZ) {zlocmin=-0.4999*detSizeZ; touchNeighbourDet=kTRUE;}
4469 if (TMath::Abs(zlocmax)>0.5*detSizeZ) {zlocmax=+0.4999*detSizeZ; touchNeighbourDet=kTRUE;}
4470 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));
4471
4472 // check if this detector is bad
4473 if (det.IsBad()) {
4474 AliDebug(2,Form("lay %d bad detector %d",ilayer,idet));
4475 if(!touchNeighbourDet) {
4476 return 2; // all detectors in road are bad
4477 } else {
4478 return 3; // at least one is bad
4479 }
4480 }
4481
4482 Int_t nChipsInRoad = segm->GetChipsInLocalWindow(chipsInRoad,zlocmin,zlocmax,xlocmin,xlocmax);
4483 AliDebug(2,Form("lay %d nChipsInRoad %d",ilayer,nChipsInRoad));
4484 if (!nChipsInRoad) return 0;
4485
4486 Bool_t anyBad=kFALSE,anyGood=kFALSE;
4487 for (Int_t iCh=0; iCh<nChipsInRoad; iCh++) {
4488 if (chipsInRoad[iCh]<0 || chipsInRoad[iCh]>det.GetNChips()-1) continue;
4489 AliDebug(2,Form(" chip %d bad %d",chipsInRoad[iCh],(Int_t)det.IsChipBad(chipsInRoad[iCh])));
4490 if (det.IsChipBad(chipsInRoad[iCh])) {
4491 anyBad=kTRUE;
4492 } else {
4493 anyGood=kTRUE;
4494 }
4495 }
4496
4497 if (!anyGood) {
4498 if(!touchNeighbourDet) {
4499 AliDebug(2,"all bad in road");
4500 return 2; // all chips in road are bad
4501 } else {
4502 return 3; // at least a bad chip in road
4503 }
4504 }
4505
4506 if (anyBad) {
4507 AliDebug(2,"at least a bad in road");
4508 return 3; // at least a bad chip in road
4509 }
4510
4511
4512 if (!AliITSReconstructor::GetRecoParam()->GetUseSingleBadChannelsFromOCDB()
4513 || !noClusters) return 0;
4514
4515 // There are no clusters in road: check if there is at least
4516 // a bad SPD pixel or SDD anode or SSD strips on both sides
4517
4518 Int_t idetInITS=idet;
4519 for(Int_t l=0;l<ilayer;l++) idetInITS+=AliITSgeomTGeo::GetNLadders(l+1)*AliITSgeomTGeo::GetNDetectors(l+1);
4520
4521 if (fITSChannelStatus->AnyBadInRoad(idetInITS,zlocmin,zlocmax,xlocmin,xlocmax)) {
4522 AliDebug(2,Form("Bad channel in det %d of layer %d\n",idet,ilayer));
4523 return 4;
4524 }
4525 //if (fITSChannelStatus->FractionOfBadInRoad(idet,zlocmin,zlocmax,xlocmin,xlocmax) > AliITSReconstructor::GetRecoParam()->GetMinFractionOfBadInRoad()) return 3;
4526
4527 return 0;
4528}
4529//------------------------------------------------------------------------
4530Bool_t AliITStrackerMI::LocalModuleCoord(Int_t ilayer,Int_t idet,
4531 const AliITStrackMI *track,
4532 Float_t &xloc,Float_t &zloc) const {
4533 //-----------------------------------------------------------------
4534 // Gives position of track in local module ref. frame
4535 //-----------------------------------------------------------------
4536
4537 xloc=0.;
4538 zloc=0.;
4539
4540 if(idet<0) return kTRUE; // track out of z acceptance of layer
4541
4542 Int_t ndet=AliITSgeomTGeo::GetNDetectors(ilayer+1); // layers from 1 to 6
4543
4544 Int_t lad = Int_t(idet/ndet) + 1;
4545
4546 Int_t det = idet - (lad-1)*ndet + 1;
4547
4548 Double_t xyzGlob[3],xyzLoc[3];
4549
4550 AliITSdetector &detector = fgLayers[ilayer].GetDetector(idet);
4551 // take into account the misalignment: xyz at real detector plane
4552 if(!track->GetXYZAt(detector.GetRmisal(),GetBz(),xyzGlob)) return kFALSE;
4553
4554 if(!AliITSgeomTGeo::GlobalToLocal(ilayer+1,lad,det,xyzGlob,xyzLoc)) return kFALSE;
4555
4556 xloc = (Float_t)xyzLoc[0];
4557 zloc = (Float_t)xyzLoc[2];
4558
4559 return kTRUE;
4560}
4561//------------------------------------------------------------------------
4562Bool_t AliITStrackerMI::IsOKForPlaneEff(const AliITStrackMI* track, const Int_t *clusters, Int_t ilayer) const {
4563//
4564// Method to be optimized further:
4565// Aim: decide whether a track can be used for PlaneEff evaluation
4566// the decision is taken based on the track quality at the layer under study
4567// no information on the clusters on this layer has to be used
4568// The criterium is to reject tracks at boundaries between basic block (e.g. SPD chip)
4569// the cut is done on number of sigmas from the boundaries
4570//
4571// Input: Actual track, layer [0,5] under study
4572// Output: none
4573// Return: kTRUE if this is a good track
4574//
4575// it will apply a pre-selection to obtain good quality tracks.
4576// Here also you will have the possibility to put a control on the
4577// impact point of the track on the basic block, in order to exclude border regions
4578// this will be done by calling a proper method of the AliITSPlaneEff class.
4579//
4580// input: AliITStrackMI* track, ilayer= layer number [0,5]
4581// return: Bool_t -> kTRUE if usable track, kFALSE if not usable.
4582//
4583 Int_t index[AliITSgeomTGeo::kNLayers];
4584 Int_t k;
4585 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
4586 //
4587 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
4588 index[k]=clusters[k];
4589 }
4590
4591 if(!fPlaneEff)
4592 {AliWarning("IsOKForPlaneEff: null pointer to AliITSPlaneEff"); return kFALSE;}
4593 AliITSlayer &layer=fgLayers[ilayer];
4594 Double_t r=layer.GetR();
4595 AliITStrackMI tmp(*track);
4596
4597// require a minimal number of cluster in other layers and eventually clusters in closest layers
4598 Int_t ncl_out=0; Int_t ncl_in=0;
4599 for(Int_t lay=AliITSgeomTGeo::kNLayers-1;lay>ilayer;lay--) { // count n. of cluster in outermost layers
4600 AliDebug(2,Form("trak=%d lay=%d ; index=%d ESD label= %d",tmp.GetLabel(),lay,
4601 tmp.GetClIndex(lay),((AliESDtrack*)tmp.GetESDtrack())->GetLabel())) ;
4602 if (tmp.GetClIndex(lay)>=0) ncl_out++;
4603 }
4604 for(Int_t lay=ilayer-1; lay>=0;lay--) { // count n. of cluster in innermost layers
4605 AliDebug(2,Form("trak=%d lay=%d ; index=%d ESD label= %d",tmp.GetLabel(),lay,
4606 tmp.GetClIndex(lay),((AliESDtrack*)tmp.GetESDtrack())->GetLabel())) ;
4607 if (tmp.GetClIndex(lay)>=0) ncl_in++;
4608 }
4609 Int_t ncl=ncl_out+ncl_out;
4610 Bool_t nextout = kFALSE;
4611 if(ilayer==AliITSgeomTGeo::kNLayers-1) nextout=kTRUE; // you are already on the outermost layer
4612 else nextout = ((tmp.GetClIndex(ilayer+1)>=0)? kTRUE : kFALSE );
4613 Bool_t nextin = kFALSE;
4614 if(ilayer==0) nextin=kTRUE; // you are already on the innermost layer
4615 else nextin = ((index[ilayer-1]>=0)? kTRUE : kFALSE );
4616 // maximum number of missing clusters allowed in outermost layers
4617 if(ncl_out<AliITSgeomTGeo::kNLayers-(ilayer+1)-AliITSReconstructor::GetRecoParam()->GetMaxMissingClustersOutPlaneEff())
4618 return kFALSE;
4619 // maximum number of missing clusters allowed (both in innermost and in outermost layers)
4620 if(ncl<AliITSgeomTGeo::kNLayers-1-AliITSReconstructor::GetRecoParam()->GetMaxMissingClustersPlaneEff())
4621 return kFALSE;
4622 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInOuterLayerPlaneEff() && !nextout) return kFALSE;
4623 if(AliITSReconstructor::GetRecoParam()->GetRequireClusterInInnerLayerPlaneEff() && !nextin) return kFALSE;
4624 if(tmp.Pt() < AliITSReconstructor::GetRecoParam()->GetMinPtPlaneEff()) return kFALSE;
4625 // if(AliITSReconstructor::GetRecoParam()->GetOnlyConstraintPlaneEff() && !tmp.GetConstrain()) return kFALSE;
4626
4627// detector number
4628 Double_t phi,z;
4629 if (!tmp.GetPhiZat(r,phi,z)) return kFALSE;
4630 Int_t idet=layer.FindDetectorIndex(phi,z);
4631 if(idet<0) { AliInfo(Form("cannot find detector"));
4632 return kFALSE;}
4633
4634 // here check if it has good Chi Square.
4635
4636 //propagate to the intersection with the detector plane
4637 const AliITSdetector &det=layer.GetDetector(idet);
4638 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return kFALSE;
4639
4640 Float_t locx; //
4641 Float_t locz; //
4642 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return kFALSE;
4643 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
4644 if(key>fPlaneEff->Nblock()) return kFALSE;
4645 Float_t blockXmn,blockXmx,blockZmn,blockZmx;
4646 if (!fPlaneEff->GetBlockBoundaries(key,blockXmn,blockXmx,blockZmn,blockZmx)) return kFALSE;
4647 //***************
4648 // DEFINITION OF SEARCH ROAD FOR accepting a track
4649 //
4650 //For the time being they are hard-wired, later on from AliITSRecoParam
4651 Double_t nsigx=AliITSReconstructor::GetRecoParam()->GetNSigXFromBoundaryPlaneEff();
4652 Double_t nsigz=AliITSReconstructor::GetRecoParam()->GetNSigZFromBoundaryPlaneEff();
4653 // Double_t nsigz=4;
4654 // Double_t nsigx=4;
4655 Double_t dx=nsigx*TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
4656 Double_t dz=nsigz*TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
4657 // done for RecPoints
4658
4659 // exclude tracks at boundary between detectors
4660 //Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidthPlaneEff();
4661 Double_t boundaryWidth=0; // for the time being hard-wired, later on from AliITSRecoParam
4662 AliDebug(2,Form("Tracking: track impact x=%f, y=%f, z=%f",tmp.GetX(), tmp.GetY(), tmp.GetZ()));
4663 AliDebug(2,Form("Local: track impact x=%f, z=%f",locx,locz));
4664 AliDebug(2,Form("Search Road. Tracking: dy=%f , dz=%f",dx,dz));
4665
4666 if ( (locx-dx < blockXmn+boundaryWidth) ||
4667 (locx+dx > blockXmx-boundaryWidth) ||
4668 (locz-dz < blockZmn+boundaryWidth) ||
4669 (locz+dz > blockZmx-boundaryWidth) ) return kFALSE;
4670 return kTRUE;
4671}
4672//------------------------------------------------------------------------
4673void AliITStrackerMI::UseTrackForPlaneEff(const AliITStrackMI* track, Int_t ilayer) {
4674//
4675// This Method has to be optimized! For the time-being it uses the same criteria
4676// as those used in the search of extra clusters for overlapping modules.
4677//
4678// Method Purpose: estabilish whether a track has produced a recpoint or not
4679// in the layer under study (For Plane efficiency)
4680//
4681// inputs: AliITStrackMI* track (pointer to a usable track)
4682// outputs: none
4683// side effects: update (by 1 count) the Plane Efficiency statistics of the basic block
4684// traversed by this very track. In details:
4685// - if a cluster can be associated to the track then call
4686// AliITSPlaneEff::UpDatePlaneEff(key,kTRUE);
4687// - if not, the AliITSPlaneEff::UpDatePlaneEff(key,kFALSE) is called
4688//
4689 if(!fPlaneEff)
4690 {AliWarning("UseTrackForPlaneEff: null pointer to AliITSPlaneEff"); return;}
4691 AliITSlayer &layer=fgLayers[ilayer];
4692 Double_t r=layer.GetR();
4693 AliITStrackMI tmp(*track);
4694
4695// detector number
4696 Double_t phi,z;
4697 if (!tmp.GetPhiZat(r,phi,z)) return;
4698 Int_t idet=layer.FindDetectorIndex(phi,z);
4699
4700 if(idet<0) { AliInfo(Form("cannot find detector"));
4701 return;}
4702
4703
4704//propagate to the intersection with the detector plane
4705 const AliITSdetector &det=layer.GetDetector(idet);
4706 if (!tmp.Propagate(det.GetPhi(),det.GetR())) return;
4707
4708
4709//***************
4710// DEFINITION OF SEARCH ROAD FOR CLUSTERS SELECTION
4711//
4712 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
4713 TMath::Sqrt(tmp.GetSigmaZ2() +
4714 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4715 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4716 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
4717 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
4718 TMath::Sqrt(tmp.GetSigmaY2() +
4719 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4720 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4721 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
4722
4723// road in global (rphi,z) [i.e. in tracking ref. system]
4724 Double_t zmin = tmp.GetZ() - dz;
4725 Double_t zmax = tmp.GetZ() + dz;
4726 Double_t ymin = tmp.GetY() + r*det.GetPhi() - dy;
4727 Double_t ymax = tmp.GetY() + r*det.GetPhi() + dy;
4728
4729// select clusters in road
4730 layer.SelectClusters(zmin,zmax,ymin,ymax);
4731
4732// Define criteria for track-cluster association
4733 Double_t msz = tmp.GetSigmaZ2() +
4734 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4735 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
4736 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
4737 Double_t msy = tmp.GetSigmaY2() +
4738 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4739 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
4740 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
4741 if (tmp.GetConstrain()) {
4742 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
4743 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
4744 } else {
4745 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
4746 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
4747 }
4748 msz = 1./msz; // 1/RoadZ^2
4749 msy = 1./msy; // 1/RoadY^2
4750//
4751
4752 const AliITSRecPoint *cl=0; Int_t clidx=-1, ci=-1;
4753 Int_t idetc=-1;
4754 Double_t chi2trkcl=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
4755 //Double_t tolerance=0.2;
4756 /*while ((cl=layer.GetNextCluster(clidx))!=0) {
4757 idetc = cl->GetDetectorIndex();
4758 if(idet!=idetc) continue;
4759 //Int_t ilay = cl->GetLayer();
4760
4761 if (TMath::Abs(tmp.GetZ() - cl->GetZ()) > tolerance) continue;
4762 if (TMath::Abs(tmp.GetY() - cl->GetY()) > tolerance) continue;
4763
4764 Double_t chi2=tmp.GetPredictedChi2(cl);
4765 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; }
4766 }*/
4767 Float_t locx; //
4768 Float_t locz; //
4769 if(!LocalModuleCoord(ilayer,idet,&tmp,locx,locz)) return;
4770//
4771 AliDebug(2,Form("ilayer= %d, idet=%d, x= %f, z=%f",ilayer,idet,locx,locz));
4772 UInt_t key=fPlaneEff->GetKeyFromDetLocCoord(ilayer,idet,locx,locz);
4773 if(key>fPlaneEff->Nblock()) return;
4774 Bool_t found=kFALSE;
4775 //if (ci>=0) {
4776 Double_t chi2;
4777 while ((cl=layer.GetNextCluster(clidx))!=0) {
4778 idetc = cl->GetDetectorIndex();
4779 if(idet!=idetc) continue;
4780 // here real control to see whether the cluster can be associated to the track.
4781 // cluster not associated to track
4782 if ( (tmp.GetZ()-cl->GetZ())*(tmp.GetZ()-cl->GetZ())*msz +
4783 (tmp.GetY()-cl->GetY())*(tmp.GetY()-cl->GetY())*msy > 1. ) continue;
4784 // calculate track-clusters chi2
4785 chi2 = GetPredictedChi2MI(&tmp,cl,ilayer); // note that this method change track tmp
4786 // in particular, the error associated to the cluster
4787 //Double_t chi2 = tmp.GetPredictedChi(cl); // this method does not change track tmp
4788 // chi2 cut
4789 if (chi2 > AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) continue;
4790 found=kTRUE;
4791 if (chi2<chi2trkcl) { chi2trkcl=chi2; ci=clidx; } // this just to trace which cluster is selected
4792 // track->SetExtraCluster(ilayer,(ilayer<<28)+ci);
4793 // track->SetExtraModule(ilayer,idetExtra);
4794 }
4795 if(!fPlaneEff->UpDatePlaneEff(found,key))
4796 AliWarning(Form("UseTrackForPlaneEff: cannot UpDate PlaneEff for key=%d",key));
4797 if(fPlaneEff->GetCreateHistos()&& AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) {
4798 Float_t tr[4]={99999.,99999.,9999.,9999.}; // initialize to high values
4799 Float_t clu[4]={-99999.,-99999.,9999.,9999.}; // (in some cases GetCov fails)
4800 Int_t cltype[2]={-999,-999};
4801
4802 tr[0]=locx;
4803 tr[1]=locz;
4804 tr[2]=TMath::Sqrt(tmp.GetSigmaY2()); // those are precisions in the tracking reference system
4805 tr[3]=TMath::Sqrt(tmp.GetSigmaZ2()); // Use it also for the module reference system, as it is
4806
4807 if (found){
4808 clu[0]=layer.GetCluster(ci)->GetDetLocalX();
4809 clu[1]=layer.GetCluster(ci)->GetDetLocalZ();
4810 cltype[0]=layer.GetCluster(ci)->GetNy();
4811 cltype[1]=layer.GetCluster(ci)->GetNz();
4812
4813 // Without the following 6 lines you would retrieve the nominal error of a cluster (e.g. for the SPD:
4814 // X->50/sqrt(12)=14 micron Z->450/sqrt(12)= 120 micron)
4815 // Within AliTrackerMI/AliTrackMI the error on the cluster is associated to the AliITStrackMI (fSigmaY,Z)
4816 // It is computed properly by calling the method
4817 // AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
4818 // T
4819 //Double_t x=0.5*(tmp.GetX()+layer.GetCluster(ci)->GetX()); // Take into account the mis-alignment
4820 //if (tmp.PropagateTo(x,0.,0.)) {
4821 chi2=GetPredictedChi2MI(&tmp,layer.GetCluster(ci),ilayer);
4822 AliCluster c(*layer.GetCluster(ci));
4823 c.SetSigmaY2(tmp.GetSigmaY(ilayer)*tmp.GetSigmaY(ilayer));
4824 c.SetSigmaZ2(tmp.GetSigmaZ(ilayer)*tmp.GetSigmaZ(ilayer));
4825 //if (layer.GetCluster(ci)->GetGlobalCov(cov)) // by using this, instead, you got nominal cluster errors
4826 clu[2]=TMath::Sqrt(c.GetSigmaY2());
4827 clu[3]=TMath::Sqrt(c.GetSigmaZ2());
4828 //}
4829 }
4830 fPlaneEff->FillHistos(key,found,tr,clu,cltype);
4831 }
4832return;
4833}
4834