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[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.cxx
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e43c066c 1/**************************************************************************
9a5326b1 2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
e43c066c 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 **************************************************************************/
fddf8459 15/* $Id$ */
bf6adc12 16
e43c066c 17//-------------------------------------------------------------------------
18// Implementation of the ITS tracker class
00a7cc50 19// It reads AliITSRecPoint clusters and creates AliITStrackMI tracks
e43c066c 20// and fills with them the ESD
15dd636f 21// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
afd25725 22// dE/dx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
23// Params moved to AliITSRecoParam by: Andrea Dainese, INFN
24// Material budget from TGeo by: Ludovic Gaudichet & Andrea Dainese, INFN
e43c066c 25//-------------------------------------------------------------------------
bf6adc12 26
27#include <TMatrixD.h>
e43c066c 28#include <TTree.h>
bf6adc12 29#include <TTreeStream.h>
afd25725 30#include <TDatabasePDG.h>
9a5326b1 31#include <TString.h>
e50912db 32#include <TRandom.h>
bf6adc12 33
af885e0f 34#include "AliESDEvent.h"
aad72f45 35#include "AliESDtrack.h"
9a5326b1 36#include "AliESDVertex.h"
6c94f330 37#include "AliV0.h"
bf6adc12 38#include "AliHelix.h"
00a7cc50 39#include "AliITSRecPoint.h"
e341247d 40#include "AliITSgeomTGeo.h"
44347160 41#include "AliITSReconstructor.h"
df29e9a4 42#include "AliTrackPointArray.h"
43#include "AliAlignObj.h"
572f41f9 44#include "AliITSClusterParam.h"
ae00569a 45#include "AliCDBManager.h"
46#include "AliCDBEntry.h"
47#include "AliITSCalibrationSPD.h"
48#include "AliITSCalibrationSDD.h"
49#include "AliITSCalibrationSSD.h"
7167ae53 50#include "AliITSPlaneEff.h"
51#include "AliITSPlaneEffSPD.h"
52#include "AliITSPlaneEffSDD.h"
53#include "AliITSPlaneEffSSD.h"
ae00569a 54#include "AliITStrackerMI.h"
e43c066c 55
56ClassImp(AliITStrackerMI)
e43c066c 57
e50912db 58AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[AliITSgeomTGeo::kNLayers]; // ITS layers
44347160 59
8221b41b 60AliITStrackerMI::AliITStrackerMI():AliTracker(),
61fI(0),
62fBestTrack(),
63fTrackToFollow(),
64fTrackHypothesys(),
65fBestHypothesys(),
66fOriginal(),
67fCurrentEsdTrack(),
68fPass(0),
69fAfterV0(kFALSE),
70fLastLayerToTrackTo(0),
afd25725 71fCoefficients(0),
8221b41b 72fEsd(0),
e50912db 73fTrackingPhase("Default"),
6518a6c5 74fUseTGeo(3),
e50912db 75fNtracks(0),
76fxOverX0Pipe(-1.),
77fxTimesRhoPipe(-1.),
78fxOverX0PipeTrks(0),
79fxTimesRhoPipeTrks(0),
80fxOverX0ShieldTrks(0),
81fxTimesRhoShieldTrks(0),
82fxOverX0LayerTrks(0),
83fxTimesRhoLayerTrks(0),
4a66240a 84fDebugStreamer(0),
ae00569a 85fPlaneEff(0) {
8221b41b 86 //Default constructor
e50912db 87 Int_t i;
88 for(i=0;i<4;i++) fSPDdetzcentre[i]=0.;
89 for(i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
90 for(i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
8221b41b 91}
44347160 92//------------------------------------------------------------------------
1f3e997f 93AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
e50912db 94fI(AliITSgeomTGeo::GetNLayers()),
8221b41b 95fBestTrack(),
96fTrackToFollow(),
97fTrackHypothesys(),
98fBestHypothesys(),
99fOriginal(),
100fCurrentEsdTrack(),
101fPass(0),
102fAfterV0(kFALSE),
e50912db 103fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()),
afd25725 104fCoefficients(0),
8221b41b 105fEsd(0),
e50912db 106fTrackingPhase("Default"),
6518a6c5 107fUseTGeo(3),
e50912db 108fNtracks(0),
109fxOverX0Pipe(-1.),
110fxTimesRhoPipe(-1.),
111fxOverX0PipeTrks(0),
112fxTimesRhoPipeTrks(0),
113fxOverX0ShieldTrks(0),
114fxTimesRhoShieldTrks(0),
115fxOverX0LayerTrks(0),
116fxTimesRhoLayerTrks(0),
4a66240a 117fDebugStreamer(0),
ae00569a 118fPlaneEff(0) {
e43c066c 119 //--------------------------------------------------------------------
120 //This is the AliITStrackerMI constructor
121 //--------------------------------------------------------------------
e341247d 122 if (geom) {
123 AliWarning("\"geom\" is actually a dummy argument !");
124 }
125
afd25725 126 fCoefficients = 0;
628e7bb0 127 fAfterV0 = kFALSE;
e341247d 128
e50912db 129 for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
e341247d 130 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
131 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
132
133 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
134 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
e43c066c 135 Double_t poff=TMath::ATan2(y,x);
136 Double_t zoff=z;
e341247d 137 Double_t r=TMath::Sqrt(x*x + y*y);
e43c066c 138
e341247d 139 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
e43c066c 140 r += TMath::Sqrt(x*x + y*y);
e341247d 141 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
e43c066c 142 r += TMath::Sqrt(x*x + y*y);
e341247d 143 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
e43c066c 144 r += TMath::Sqrt(x*x + y*y);
145 r*=0.25;
146
147 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
148
149 for (Int_t j=1; j<nlad+1; j++) {
150 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
e341247d 151 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
1f3e997f 152 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
153 m.Multiply(tm);
154 Double_t txyz[3]={0.}, xyz[3]={0.};
155 m.LocalToMaster(txyz,xyz);
156 Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
157 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
e341247d 158
159 if (phi<0) phi+=TMath::TwoPi();
160 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
161
e43c066c 162 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
163 new(&det) AliITSdetector(r,phi);
164 }
165 }
166
167 }
168
e50912db 169 fI=AliITSgeomTGeo::GetNLayers();
e43c066c 170
171 fPass=0;
172 fConstraint[0]=1; fConstraint[1]=0;
173
afd25725 174 Double_t xyzVtx[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
175 AliITSReconstructor::GetRecoParam()->GetYVdef(),
176 AliITSReconstructor::GetRecoParam()->GetZVdef()};
177 Double_t ersVtx[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
178 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
179 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
180 SetVertex(xyzVtx,ersVtx);
e43c066c 181
e50912db 182 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i);
183 fLastLayerToTrackTo=AliITSRecoParam::GetLastLayerToTrackTo();
628e7bb0 184 for (Int_t i=0;i<100000;i++){
185 fBestTrackIndex[i]=0;
186 }
afd25725 187
188 // store positions of centre of SPD modules (in z)
189 Double_t tr[3];
190 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
191 fSPDdetzcentre[0] = tr[2];
192 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
193 fSPDdetzcentre[1] = tr[2];
194 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
195 fSPDdetzcentre[2] = tr[2];
196 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
197 fSPDdetzcentre[3] = tr[2];
198
afd25725 199 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
6518a6c5 200 if(AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance() && fUseTGeo!=1 && fUseTGeo!=3) {
201 AliWarning("fUseTGeo changed to 3 because fExtendedEtaAcceptance is kTRUE");
202 fUseTGeo = 3;
203 }
e50912db 204
205 for(Int_t i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
206 for(Int_t i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
207
81e97e0d 208 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
209
7167ae53 210 // only for plane efficiency evaluation
211 if (AliITSReconstructor::GetRecoParam()->GetComputePlaneEff()) {
212 for(Int_t ilay=0;ilay<6;ilay++) {
213 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilay)) {
214 if (ilay<2) fPlaneEff = new AliITSPlaneEffSPD();
215 else if (ilay<4) fPlaneEff = new AliITSPlaneEffSDD();
216 else fPlaneEff = new AliITSPlaneEffSSD();
217 break; // only one layer type to skip at once
218 }
219 }
275a301c 220 if(AliITSReconstructor::GetRecoParam()->GetReadPlaneEffFromOCDB())
221 if(!fPlaneEff->ReadFromCDB()) {AliWarning("AliITStrackerMI reading of AliITSPlaneEff from OCDB failed") ;}
5fbd4fd6 222 if(AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) {
223 fPlaneEff->SetCreateHistos(kTRUE);
224 //fPlaneEff->ReadHistosFromFile();
225 }
7167ae53 226 }
628e7bb0 227}
44347160 228//------------------------------------------------------------------------
8221b41b 229AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
230fI(tracker.fI),
231fBestTrack(tracker.fBestTrack),
232fTrackToFollow(tracker.fTrackToFollow),
233fTrackHypothesys(tracker.fTrackHypothesys),
234fBestHypothesys(tracker.fBestHypothesys),
235fOriginal(tracker.fOriginal),
236fCurrentEsdTrack(tracker.fCurrentEsdTrack),
237fPass(tracker.fPass),
238fAfterV0(tracker.fAfterV0),
239fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
afd25725 240fCoefficients(tracker.fCoefficients),
8221b41b 241fEsd(tracker.fEsd),
e50912db 242fTrackingPhase(tracker.fTrackingPhase),
afd25725 243fUseTGeo(tracker.fUseTGeo),
e50912db 244fNtracks(tracker.fNtracks),
245fxOverX0Pipe(tracker.fxOverX0Pipe),
246fxTimesRhoPipe(tracker.fxTimesRhoPipe),
247fxOverX0PipeTrks(0),
248fxTimesRhoPipeTrks(0),
249fxOverX0ShieldTrks(0),
250fxTimesRhoShieldTrks(0),
251fxOverX0LayerTrks(0),
252fxTimesRhoLayerTrks(0),
4a66240a 253fDebugStreamer(tracker.fDebugStreamer),
ae00569a 254fPlaneEff(tracker.fPlaneEff) {
8221b41b 255 //Copy constructor
e50912db 256 Int_t i;
257 for(i=0;i<4;i++) {
258 fSPDdetzcentre[i]=tracker.fSPDdetzcentre[i];
259 }
260 for(i=0;i<6;i++) {
261 fxOverX0Layer[i]=tracker.fxOverX0Layer[i];
262 fxTimesRhoLayer[i]=tracker.fxTimesRhoLayer[i];
263 }
264 for(i=0;i<2;i++) {
265 fxOverX0Shield[i]=tracker.fxOverX0Shield[i];
266 fxTimesRhoShield[i]=tracker.fxTimesRhoShield[i];
267 }
8221b41b 268}
44347160 269//------------------------------------------------------------------------
8221b41b 270AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
271 //Assignment operator
272 this->~AliITStrackerMI();
273 new(this) AliITStrackerMI(tracker);
274 return *this;
275}
44347160 276//------------------------------------------------------------------------
628e7bb0 277AliITStrackerMI::~AliITStrackerMI()
278{
279 //
280 //destructor
281 //
e50912db 282 if (fCoefficients) delete [] fCoefficients;
283 DeleteTrksMaterialLUT();
81e97e0d 284 if (fDebugStreamer) {
285 //fDebugStreamer->Close();
286 delete fDebugStreamer;
287 }
e43c066c 288}
44347160 289//------------------------------------------------------------------------
e43c066c 290void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
291 //--------------------------------------------------------------------
292 //This function set masks of the layers which must be not skipped
293 //--------------------------------------------------------------------
e50912db 294 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=l[i];
e43c066c 295}
44347160 296//------------------------------------------------------------------------
e43c066c 297Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
298 //--------------------------------------------------------------------
299 //This function loads ITS clusters
300 //--------------------------------------------------------------------
00a7cc50 301 TBranch *branch=cTree->GetBranch("ITSRecPoints");
e43c066c 302 if (!branch) {
303 Error("LoadClusters"," can't get the branch !\n");
304 return 1;
305 }
306
00a7cc50 307 TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
e43c066c 308 branch->SetAddress(&clusters);
309
310 Int_t j=0;
311 Int_t detector=0;
e50912db 312 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
e43c066c 313 Int_t ndet=fgLayers[i].GetNdetectors();
314 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
315 for (; j<jmax; j++) {
316 if (!cTree->GetEvent(j)) continue;
317 Int_t ncl=clusters->GetEntriesFast();
318 SignDeltas(clusters,GetZ());
1f3e997f 319
e43c066c 320 while (ncl--) {
00a7cc50 321 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
75fb37cc 322 detector=c->GetDetectorIndex();
a504d56f 323
75fb37cc 324 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
a504d56f 325
00a7cc50 326 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
e43c066c 327 }
328 clusters->Delete();
afd25725 329 // add dead zone "virtual" cluster in SPD, if there is a cluster within
330 // zwindow cm from the dead zone
331 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
e50912db 332 for (Float_t xdead = 0; xdead < AliITSRecoParam::GetSPDdetxlength(); xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
afd25725 333 Int_t lab[4] = {0,0,0,detector};
334 Int_t info[3] = {0,0,i};
6518a6c5 335 Float_t q = 0.; // this identifies virtual clusters
afd25725 336 Float_t hit[5] = {xdead,
337 0.,
338 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
339 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
340 q};
341 Bool_t local = kTRUE;
342 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
e50912db 343 hit[1] = fSPDdetzcentre[0]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 344 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
345 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 346 hit[1] = fSPDdetzcentre[1]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 347 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
348 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 349 hit[1] = fSPDdetzcentre[1]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 350 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
351 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 352 hit[1] = fSPDdetzcentre[2]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 353 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
354 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 355 hit[1] = fSPDdetzcentre[2]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 356 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
357 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 358 hit[1] = fSPDdetzcentre[3]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 359 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
360 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e43c066c 361 }
6518a6c5 362 } // "virtual" clusters in SPD
e43c066c 363
364 }
365 //
366 fgLayers[i].ResetRoad(); //road defined by the cluster density
367 fgLayers[i].SortClusters();
368 }
369
370 return 0;
371}
44347160 372//------------------------------------------------------------------------
e43c066c 373void AliITStrackerMI::UnloadClusters() {
374 //--------------------------------------------------------------------
375 //This function unloads ITS clusters
376 //--------------------------------------------------------------------
e50912db 377 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
e43c066c 378}
44347160 379//------------------------------------------------------------------------
afd25725 380static Int_t CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
e43c066c 381 //--------------------------------------------------------------------
382 // Correction for the material between the TPC and the ITS
e43c066c 383 //--------------------------------------------------------------------
e50912db 384 if (t->GetX() > AliITSRecoParam::Getriw()) { // inward direction
385 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw(),1)) return 0;// TPC inner wall
386 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
387 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
388 } else if (t->GetX() < AliITSRecoParam::Getrs()) { // outward direction
389 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
390 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
391 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw()+0.001,1)) return 0;// TPC inner wall
e43c066c 392 } else {
afd25725 393 Error("CorrectForTPCtoITSDeadZoneMaterial","Track is already in the dead zone !");
e50912db 394 return 0;
e43c066c 395 }
396
e50912db 397 return 1;
e43c066c 398}
44347160 399//------------------------------------------------------------------------
af885e0f 400Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
e43c066c 401 //--------------------------------------------------------------------
402 // This functions reconstructs ITS tracks
403 // The clusters must be already loaded !
404 //--------------------------------------------------------------------
fddf8459 405
406
e50912db 407 fTrackingPhase="Clusters2Tracks";
408
e43c066c 409 TObjArray itsTracks(15000);
628e7bb0 410 fOriginal.Clear();
81e97e0d 411 fEsd = event; // store pointer to the esd
afd25725 412
9a5326b1 413 // temporary (for cosmics)
414 if(event->GetVertex()) {
415 TString title = event->GetVertex()->GetTitle();
416 if(title.Contains("cosmics")) {
417 Double_t xyz[3]={GetX(),GetY(),GetZ()};
418 Double_t exyz[3]={0.1,0.1,0.1};
419 SetVertex(xyz,exyz);
420 }
421 }
422 // temporary
afd25725 423
e43c066c 424 {/* Read ESD tracks */
afd25725 425 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
e43c066c 426 Int_t nentr=event->GetNumberOfTracks();
427 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
428 while (nentr--) {
429 AliESDtrack *esd=event->GetTrack(nentr);
430
431 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
432 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
433 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
51ad6848 434 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
15dd636f 435 AliITStrackMI *t=0;
e43c066c 436 try {
15dd636f 437 t=new AliITStrackMI(*esd);
e43c066c 438 } catch (const Char_t *msg) {
628e7bb0 439 //Warning("Clusters2Tracks",msg);
e43c066c 440 delete t;
441 continue;
442 }
b9671574 443 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
444 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
6518a6c5 445
446
afd25725 447 // look at the ESD mass hypothesys !
448 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
e43c066c 449 // write expected q
b9671574 450 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 451
afd25725 452 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
81e97e0d 453 //track - can be V0 according to TPC
afd25725 454 } else {
455 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
81e97e0d 456 delete t;
457 continue;
e50912db 458 }
afd25725 459 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
81e97e0d 460 delete t;
461 continue;
462 }
6c23ffed 463 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
81e97e0d 464 delete t;
465 continue;
466 }
e50912db 467 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
81e97e0d 468 delete t;
469 continue;
470 }
e43c066c 471 }
b9671574 472 t->SetReconstructed(kFALSE);
e43c066c 473 itsTracks.AddLast(t);
628e7bb0 474 fOriginal.AddLast(t);
e43c066c 475 }
476 } /* End Read ESD tracks */
477
478 itsTracks.Sort();
628e7bb0 479 fOriginal.Sort();
e43c066c 480 Int_t nentr=itsTracks.GetEntriesFast();
481 fTrackHypothesys.Expand(nentr);
81e97e0d 482 fBestHypothesys.Expand(nentr);
afd25725 483 MakeCoefficients(nentr);
513ab112 484 if(fUseTGeo==3 || fUseTGeo==4) MakeTrksMaterialLUT(event->GetNumberOfTracks());
e43c066c 485 Int_t ntrk=0;
afd25725 486 // THE TWO TRACKING PASSES
e43c066c 487 for (fPass=0; fPass<2; fPass++) {
488 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
e50912db 489 for (fCurrentEsdTrack=0; fCurrentEsdTrack<nentr; fCurrentEsdTrack++) {
2755f080 490 //cerr<<fPass<<" "<<fCurrentEsdTrack<<'\n';
e50912db 491 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(fCurrentEsdTrack);
e43c066c 492 if (t==0) continue; //this track has been already tracked
b9671574 493 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
791f9a2a 494 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
afd25725 495 if (fConstraint[fPass]) {
496 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
497 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
498 }
e43c066c 499
500 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
501 fI = 6;
502 ResetTrackToFollow(*t);
503 ResetBestTrack();
6518a6c5 504
e50912db 505 FollowProlongationTree(t,fCurrentEsdTrack,fConstraint[fPass]);
e43c066c 506
507 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
508 //
ae00569a 509 AliITStrackMI *besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
e43c066c 510 if (!besttrack) continue;
511 besttrack->SetLabel(tpcLabel);
512 // besttrack->CookdEdx();
513 CookdEdx(besttrack);
b9671574 514 besttrack->SetFakeRatio(1.);
e43c066c 515 CookLabel(besttrack,0.); //For comparison only
e43c066c 516 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
628e7bb0 517
628e7bb0 518 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
519
b9671574 520 t->SetReconstructed(kTRUE);
e43c066c 521 ntrk++;
522 }
523 GetBestHypothesysMIP(itsTracks);
afd25725 524 } // end loop on the two tracking passes
e43c066c 525
afd25725 526 if(event->GetNumberOfV0s()>0) UpdateTPCV0(event);
527 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) FindV02(event);
628e7bb0 528 fAfterV0 = kTRUE;
628e7bb0 529 //
e43c066c 530 itsTracks.Delete();
531 //
532 Int_t entries = fTrackHypothesys.GetEntriesFast();
e50912db 533 for (Int_t ientry=0; ientry<entries; ientry++) {
e43c066c 534 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
535 if (array) array->Delete();
536 delete fTrackHypothesys.RemoveAt(ientry);
537 }
538
539 fTrackHypothesys.Delete();
81e97e0d 540 fBestHypothesys.Delete();
628e7bb0 541 fOriginal.Clear();
afd25725 542 delete [] fCoefficients;
543 fCoefficients=0;
e50912db 544 DeleteTrksMaterialLUT();
545
e43c066c 546 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
e50912db 547
548 fTrackingPhase="Default";
628e7bb0 549
e43c066c 550 return 0;
551}
44347160 552//------------------------------------------------------------------------
af885e0f 553Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
e43c066c 554 //--------------------------------------------------------------------
555 // This functions propagates reconstructed ITS tracks back
556 // The clusters must be loaded !
557 //--------------------------------------------------------------------
e50912db 558 fTrackingPhase="PropagateBack";
e43c066c 559 Int_t nentr=event->GetNumberOfTracks();
560 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
561
562 Int_t ntrk=0;
563 for (Int_t i=0; i<nentr; i++) {
564 AliESDtrack *esd=event->GetTrack(i);
565
566 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
567 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
568
15dd636f 569 AliITStrackMI *t=0;
e43c066c 570 try {
15dd636f 571 t=new AliITStrackMI(*esd);
e43c066c 572 } catch (const Char_t *msg) {
628e7bb0 573 //Warning("PropagateBack",msg);
e43c066c 574 delete t;
575 continue;
576 }
b9671574 577 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 578
579 ResetTrackToFollow(*t);
580
9a5326b1 581 // propagate to vertex [SR, GSI 17.02.2003]
e43c066c 582 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
e50912db 583 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
584 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
585 fTrackToFollow.StartTimeIntegral();
586 // from vertex to outside pipe
587 CorrectForPipeMaterial(&fTrackToFollow,"outward");
e43c066c 588 }
589
6c94f330 590 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
e50912db 591 if (RefitAt(AliITSRecoParam::GetrInsideITSscreen(),&fTrackToFollow,t)) {
592 if (!CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)) {
e43c066c 593 delete t;
594 continue;
595 }
596 fTrackToFollow.SetLabel(t->GetLabel());
597 //fTrackToFollow.CookdEdx();
598 CookLabel(&fTrackToFollow,0.); //For comparison only
599 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
600 //UseClusters(&fTrackToFollow);
601 ntrk++;
602 }
603 delete t;
604 }
605
606 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
607
e50912db 608 fTrackingPhase="Default";
609
e43c066c 610 return 0;
611}
44347160 612//------------------------------------------------------------------------
af885e0f 613Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
e43c066c 614 //--------------------------------------------------------------------
615 // This functions refits ITS tracks using the
616 // "inward propagated" TPC tracks
617 // The clusters must be loaded !
618 //--------------------------------------------------------------------
e50912db 619 fTrackingPhase="RefitInward";
afd25725 620 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) RefitV02(event);
e43c066c 621 Int_t nentr=event->GetNumberOfTracks();
622 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
623
624 Int_t ntrk=0;
625 for (Int_t i=0; i<nentr; i++) {
626 AliESDtrack *esd=event->GetTrack(i);
627
628 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
629 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
630 if (esd->GetStatus()&AliESDtrack::kTPCout)
631 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
632
15dd636f 633 AliITStrackMI *t=0;
e43c066c 634 try {
15dd636f 635 t=new AliITStrackMI(*esd);
e43c066c 636 } catch (const Char_t *msg) {
628e7bb0 637 //Warning("RefitInward",msg);
e43c066c 638 delete t;
639 continue;
640 }
b9671574 641 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e50912db 642 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
e43c066c 643 delete t;
644 continue;
645 }
646
647 ResetTrackToFollow(*t);
648 fTrackToFollow.ResetClusters();
649
650 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
6c94f330 651 fTrackToFollow.ResetCovariance(10.);
e43c066c 652
653 //Refitting...
7167ae53 654 Bool_t pe=AliITSReconstructor::GetRecoParam()->GetComputePlaneEff();
655 if (RefitAt(AliITSRecoParam::GetrInsideSPD1(),&fTrackToFollow,t,kTRUE,pe)) {
e43c066c 656 fTrackToFollow.SetLabel(t->GetLabel());
657 // fTrackToFollow.CookdEdx();
658 CookdEdx(&fTrackToFollow);
659
660 CookLabel(&fTrackToFollow,0.0); //For comparison only
661
9a5326b1 662 //The beam pipe
e50912db 663 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
ae00569a 664 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
9a5326b1 665 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
ae00569a 666 //printf(" %d\n",esdTrack->GetITSModuleIndex(0));
667 //esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); //original line
9a5326b1 668 Float_t r[3]={0.,0.,0.};
669 Double_t maxD=3.;
670 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
671 ntrk++;
e43c066c 672 }
673 }
674 delete t;
675 }
676
677 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
678
e50912db 679 fTrackingPhase="Default";
680
e43c066c 681 return 0;
682}
44347160 683//------------------------------------------------------------------------
e43c066c 684AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
685 //--------------------------------------------------------------------
686 // Return pointer to a given cluster
687 //--------------------------------------------------------------------
688 Int_t l=(index & 0xf0000000) >> 28;
689 Int_t c=(index & 0x0fffffff) >> 00;
690 return fgLayers[l].GetCluster(c);
691}
9a5326b1 692//------------------------------------------------------------------------
df29e9a4 693Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
9a5326b1 694 //--------------------------------------------------------------------
df29e9a4 695 // Get track space point with index i
9a5326b1 696 //--------------------------------------------------------------------
60066577 697
78b03929 698 Int_t l=(index & 0xf0000000) >> 28;
699 Int_t c=(index & 0x0fffffff) >> 00;
00a7cc50 700 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
df29e9a4 701 Int_t idet = cl->GetDetectorIndex();
4e65ff9e 702
60066577 703 Float_t xyz[3];
704 Float_t cov[6];
705 cl->GetGlobalXYZ(xyz);
706 cl->GetGlobalCov(cov);
707 p.SetXYZ(xyz, cov);
4e65ff9e 708
ae079791 709 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
df29e9a4 710 switch (l) {
711 case 0:
ae079791 712 iLayer = AliGeomManager::kSPD1;
df29e9a4 713 break;
714 case 1:
ae079791 715 iLayer = AliGeomManager::kSPD2;
df29e9a4 716 break;
717 case 2:
ae079791 718 iLayer = AliGeomManager::kSDD1;
df29e9a4 719 break;
720 case 3:
ae079791 721 iLayer = AliGeomManager::kSDD2;
9a5326b1 722 break;
723 case 4:
724 iLayer = AliGeomManager::kSSD1;
725 break;
726 case 5:
727 iLayer = AliGeomManager::kSSD2;
728 break;
729 default:
730 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
731 break;
732 };
733 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
734 p.SetVolumeID((UShort_t)volid);
735 return kTRUE;
736}
737//------------------------------------------------------------------------
738Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
739 AliTrackPoint& p, const AliESDtrack *t) {
740 //--------------------------------------------------------------------
741 // Get track space point with index i
742 // (assign error estimated during the tracking)
743 //--------------------------------------------------------------------
744
745 Int_t l=(index & 0xf0000000) >> 28;
746 Int_t c=(index & 0x0fffffff) >> 00;
747 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
748 Int_t idet = cl->GetDetectorIndex();
749 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
750
751 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
752 Float_t detxy[2];
753 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
754 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
755 Double_t alpha = t->GetAlpha();
756 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
757 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe,AliTracker::GetBz()));
758 phi += alpha-det.GetPhi();
759 Float_t tgphi = TMath::Tan(phi);
760
761 Float_t tgl = t->GetTgl(); // tgl about const along track
762 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
763
764 Float_t errlocalx,errlocalz;
e50912db 765 AliITSClusterParam::GetError(l,cl,tgl,tgphi,expQ,errlocalx,errlocalz);
9a5326b1 766
767 Float_t xyz[3];
768 Float_t cov[6];
769 cl->GetGlobalXYZ(xyz);
770 // cl->GetGlobalCov(cov);
771 Float_t pos[3] = {0.,0.,0.};
772 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errlocalx*errlocalx,errlocalz*errlocalz,0);
773 tmpcl.GetGlobalCov(cov);
774
775 p.SetXYZ(xyz, cov);
776
777 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
778 switch (l) {
779 case 0:
780 iLayer = AliGeomManager::kSPD1;
781 break;
782 case 1:
783 iLayer = AliGeomManager::kSPD2;
784 break;
785 case 2:
786 iLayer = AliGeomManager::kSDD1;
787 break;
788 case 3:
789 iLayer = AliGeomManager::kSDD2;
df29e9a4 790 break;
791 case 4:
ae079791 792 iLayer = AliGeomManager::kSSD1;
df29e9a4 793 break;
794 case 5:
ae079791 795 iLayer = AliGeomManager::kSSD2;
df29e9a4 796 break;
797 default:
798 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
799 break;
800 };
ae079791 801 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
df29e9a4 802 p.SetVolumeID((UShort_t)volid);
803 return kTRUE;
804}
44347160 805//------------------------------------------------------------------------
81e97e0d 806void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
e43c066c 807{
808 //--------------------------------------------------------------------
809 // Follow prolongation tree
810 //--------------------------------------------------------------------
81e97e0d 811 //
afd25725 812 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
813 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
814
2755f080 815
b9671574 816 AliESDtrack * esd = otrack->GetESDtrack();
afd25725 817 if (esd->GetV0Index(0)>0) {
81e97e0d 818 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
afd25725 819 // mapping of ESD track is different as ITS track in Containers
81e97e0d 820 // Need something more stable
44347160 821 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
81e97e0d 822 for (Int_t i=0;i<3;i++){
823 Int_t index = esd->GetV0Index(i);
824 if (index==0) break;
d6a49f20 825 AliESDv0 * vertex = fEsd->GetV0(index);
81e97e0d 826 if (vertex->GetStatus()<0) continue; // rejected V0
827 //
afd25725 828 if (esd->GetSign()>0) {
829 vertex->SetIndex(0,esdindex);
830 } else {
831 vertex->SetIndex(1,esdindex);
832 }
81e97e0d 833 }
834 }
835 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
836 if (!bestarray){
837 bestarray = new TObjArray(5);
838 fBestHypothesys.AddAt(bestarray,esdindex);
839 }
e43c066c 840
81e97e0d 841 //
e43c066c 842 //setup tree of the prolongations
843 //
15dd636f 844 static AliITStrackMI tracks[7][100];
845 AliITStrackMI *currenttrack;
846 static AliITStrackMI currenttrack1;
847 static AliITStrackMI currenttrack2;
848 static AliITStrackMI backuptrack;
e43c066c 849 Int_t ntracks[7];
850 Int_t nindexes[7][100];
851 Float_t normalizedchi2[100];
852 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
b9671574 853 otrack->SetNSkipped(0);
15dd636f 854 new (&(tracks[6][0])) AliITStrackMI(*otrack);
e43c066c 855 ntracks[6]=1;
81e97e0d 856 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
ae00569a 857 Int_t modstatus = 1; // found
858 Float_t xloc,zloc;
e43c066c 859 //
860 //
861 // follow prolongations
e50912db 862 for (Int_t ilayer=5; ilayer>=0; ilayer--) {
2755f080 863 fI = ilayer;
e43c066c 864 //
2755f080 865 AliITSlayer &layer=fgLayers[ilayer];
866 Double_t r = layer.GetR();
e43c066c 867 ntracks[ilayer]=0;
868 //
869 //
2755f080 870 Int_t nskipped=0;
e43c066c 871 Float_t nused =0;
e50912db 872 for (Int_t itrack =0; itrack<ntracks[ilayer+1]; itrack++) {
e43c066c 873 //set current track
874 if (ntracks[ilayer]>=100) break;
b9671574 875 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
876 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
e43c066c 877 if (ntracks[ilayer]>15+ilayer){
b9671574 878 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
879 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
e43c066c 880 }
881
15dd636f 882 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
44347160 883
afd25725 884 // material between SSD and SDD, SDD and SPD
e50912db 885 if (ilayer==3)
886 if(!CorrectForShieldMaterial(&currenttrack1,"SDD","inward")) continue;
887 if (ilayer==1)
888 if(!CorrectForShieldMaterial(&currenttrack1,"SPD","inward")) continue;
8602c008 889
2755f080 890 // detector number
8602c008 891 Double_t phi,z;
892 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
e43c066c 893 Int_t idet=layer.FindDetectorIndex(phi,z);
e50912db 894
895 Double_t trackGlobXYZ1[3];
896 currenttrack1.GetXYZ(trackGlobXYZ1);
897
2755f080 898 // Get the budget to the primary vertex for the current track being prolonged
899 Double_t budgetToPrimVertex = GetEffectiveThickness();
900
901 // check if we allow a prolongation without point
6518a6c5 902 Int_t skip = CheckSkipLayer(&currenttrack1,ilayer,idet);
2755f080 903 if (skip) {
904 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
6518a6c5 905 // propagate to the layer radius
906 Double_t xToGo; vtrack->GetLocalXat(r,xToGo);
907 vtrack->AliExternalTrackParam::PropagateTo(xToGo,GetBz());
2755f080 908 // apply correction for material of the current layer
909 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
910 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
911 vtrack->SetClIndex(ilayer,0);
ae00569a 912 modstatus = (skip==1 ? 3 : 4); // skipped : out in z
913 LocalModuleCoord(ilayer,idet,vtrack,xloc,zloc); // local module coords
914 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2755f080 915 if(constrain) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
916 ntracks[ilayer]++;
6518a6c5 917 continue;
2755f080 918 }
919
920 // track outside layer acceptance in z
921 if (idet<0) continue;
922
923 //propagate to the intersection with the detector plane
924 const AliITSdetector &det=layer.GetDetector(idet);
925 new(&currenttrack2) AliITStrackMI(currenttrack1);
44347160 926 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
ae00569a 927 LocalModuleCoord(ilayer,idet,&currenttrack1,xloc,zloc); // local module coords
44347160 928 currenttrack2.Propagate(det.GetPhi(),det.GetR());
e43c066c 929 currenttrack1.SetDetectorIndex(idet);
930 currenttrack2.SetDetectorIndex(idet);
6518a6c5 931
afd25725 932 //***************
933 // DEFINITION OF SEARCH ROAD FOR CLUSTERS SELECTION
e43c066c 934 //
44347160 935 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
936 TMath::Sqrt(currenttrack1.GetSigmaZ2() +
937 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
938 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
939 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
940 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
941 TMath::Sqrt(currenttrack1.GetSigmaY2() +
942 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
943 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
944 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
afd25725 945
44347160 946 // track at boundary between detectors, enlarge road
e50912db 947 Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidth();
948 if ( (currenttrack1.GetY()-dy < det.GetYmin()+boundaryWidth) ||
949 (currenttrack1.GetY()+dy > det.GetYmax()-boundaryWidth) ||
950 (currenttrack1.GetZ()-dz < det.GetZmin()+boundaryWidth) ||
951 (currenttrack1.GetZ()+dz > det.GetZmax()-boundaryWidth) ) {
afd25725 952 Float_t tgl = TMath::Abs(currenttrack1.GetTgl());
953 if (tgl > 1.) tgl=1.;
e50912db 954 Double_t deltaXNeighbDets=AliITSRecoParam::GetDeltaXNeighbDets();
955 dz = TMath::Sqrt(dz*dz+deltaXNeighbDets*deltaXNeighbDets*tgl*tgl);
afd25725 956 Float_t snp = TMath::Abs(currenttrack1.GetSnp());
957 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) continue;
e50912db 958 dy = TMath::Sqrt(dy*dy+deltaXNeighbDets*deltaXNeighbDets*snp*snp);
44347160 959 } // boundary
e43c066c 960
2755f080 961 // road in global (rphi,z) [i.e. in tracking ref. system]
44347160 962 Double_t zmin = currenttrack1.GetZ() - dz;
963 Double_t zmax = currenttrack1.GetZ() + dz;
964 Double_t ymin = currenttrack1.GetY() + r*det.GetPhi() - dy;
965 Double_t ymax = currenttrack1.GetY() + r*det.GetPhi() + dy;
2755f080 966
afd25725 967 // select clusters in road
e43c066c 968 layer.SelectClusters(zmin,zmax,ymin,ymax);
afd25725 969 //********************
44347160 970
afd25725 971 // Define criteria for track-cluster association
44347160 972 Double_t msz = currenttrack1.GetSigmaZ2() +
973 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
974 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
975 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
976 Double_t msy = currenttrack1.GetSigmaY2() +
977 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
978 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
979 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
980 if (constrain) {
981 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
982 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
983 } else {
984 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
985 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
986 }
987 msz = 1./msz; // 1/RoadZ^2
988 msy = 1./msy; // 1/RoadY^2
e43c066c 989 //
e43c066c 990 //
afd25725 991 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
e43c066c 992 //
afd25725 993 const AliITSRecPoint *cl=0;
994 Int_t clidx=-1;
995 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
6518a6c5 996 Bool_t deadzoneSPD=kFALSE;
e43c066c 997 currenttrack = &currenttrack1;
6518a6c5 998
ae00569a 999 // check if the road contains a dead zone
1000 Int_t dead = CheckDeadZone(ilayer,idet,zmin,zmax);
1001 // create a prolongation without clusters (check also if there are no clusters in the road)
1002 if (dead ||
1003 ((layer.GetNextCluster(clidx,kTRUE))==0 &&
1004 AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad())) {
6518a6c5 1005 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
1006 updatetrack->SetClIndex(ilayer,0);
ae00569a 1007 if (dead==0) {
1008 modstatus = 5; // no cls in road
1009 } else if (dead==1) {
1010 modstatus = 7; // holes in z in SPD
1011 } else if (dead==2) {
1012 modstatus = 2; // dead from OCDB
1013 }
1014 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
6518a6c5 1015 // apply correction for material of the current layer
1016 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1017 if (constrain) { // apply vertex constrain
1018 updatetrack->SetConstrain(constrain);
1019 Bool_t isPrim = kTRUE;
1020 if (ilayer<4) { // check that it's close to the vertex
1021 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1022 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1023 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1024 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1025 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1026 }
1027 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1028 }
ae00569a 1029 if (dead) {
1030 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
1031 if (dead==1) { // dead zone at z=0,+-7cm in SPD
1032 updatetrack->SetDeadZoneProbability(GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
1033 deadzoneSPD=kTRUE;
1034 }
6518a6c5 1035 }
1036 ntracks[ilayer]++;
1037 }
1038
ae00569a 1039 clidx=-1;
6518a6c5 1040 // loop over clusters in the road
afd25725 1041 while ((cl=layer.GetNextCluster(clidx))!=0) {
e43c066c 1042 if (ntracks[ilayer]>95) break; //space for skipped clusters
afd25725 1043 Bool_t changedet =kFALSE;
6518a6c5 1044 if (cl->GetQ()==0 && deadzoneSPD==kTRUE) continue;
afd25725 1045 Int_t idet=cl->GetDetectorIndex();
1046
1047 if (currenttrack->GetDetectorIndex()==idet) { // track already on the cluster's detector
1048 // a first cut on track-cluster distance
1049 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
1050 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
1051 continue; // cluster not associated to track
1052 } else { // have to move track to cluster's detector
e43c066c 1053 const AliITSdetector &det=layer.GetDetector(idet);
afd25725 1054 // a first cut on track-cluster distance
e43c066c 1055 Double_t y,z;
1056 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
afd25725 1057 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
1058 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
44347160 1059 continue; // cluster not associated to track
e43c066c 1060 //
15dd636f 1061 new (&backuptrack) AliITStrackMI(currenttrack2);
afd25725 1062 changedet = kTRUE;
e43c066c 1063 currenttrack =&currenttrack2;
1064 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
15dd636f 1065 new (currenttrack) AliITStrackMI(backuptrack);
afd25725 1066 changedet = kFALSE;
e43c066c 1067 continue;
1068 }
1069 currenttrack->SetDetectorIndex(idet);
e50912db 1070 // Get again the budget to the primary vertex
1071 // for the current track being prolonged, if had to change detector
1072 //budgetToPrimVertex = GetEffectiveThickness();// not needed at the moment because anyway we take a mean material for this correction
e43c066c 1073 }
1074
afd25725 1075 // calculate track-clusters chi2
1076 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
1077 // chi2 cut
1078 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
6518a6c5 1079 if (cl->GetQ()==0) deadzoneSPD=kTRUE; // only 1 prolongation with virtual cluster
e43c066c 1080 if (ntracks[ilayer]>=100) continue;
15dd636f 1081 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
b9671574 1082 updatetrack->SetClIndex(ilayer,0);
afd25725 1083 if (changedet) new (&currenttrack2) AliITStrackMI(backuptrack);
ae00569a 1084
6518a6c5 1085 if (cl->GetQ()!=0) { // real cluster
afd25725 1086 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) continue;
1087 updatetrack->SetSampledEdx(cl->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
ae00569a 1088 modstatus = 1; // found
6518a6c5 1089 } else { // virtual cluster in dead zone
b9671574 1090 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
6518a6c5 1091 updatetrack->SetDeadZoneProbability(GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
ae00569a 1092 modstatus = 7; // holes in z in SPD
1093 }
1094
1095 if (changedet) {
1096 Float_t xlocnewdet,zlocnewdet;
1097 LocalModuleCoord(ilayer,idet,updatetrack,xlocnewdet,zlocnewdet); // local module coords
1098 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xlocnewdet,zlocnewdet);
1099 } else {
1100 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
e43c066c 1101 }
afd25725 1102 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1103
1104 // apply correction for material of the current layer
e50912db 1105 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1106
afd25725 1107 if (constrain) { // apply vertex constrain
b9671574 1108 updatetrack->SetConstrain(constrain);
e43c066c 1109 Bool_t isPrim = kTRUE;
afd25725 1110 if (ilayer<4) { // check that it's close to the vertex
b9671574 1111 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
afd25725 1112 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1113 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1114 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1115 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
e43c066c 1116 }
afd25725 1117 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
e43c066c 1118 } //apply vertex constrain
1119 ntracks[ilayer]++;
afd25725 1120 } // create new hypothesis
2755f080 1121 } // loop over possible prolongations
1122
1123 // allow one prolongation without clusters
6518a6c5 1124 if (constrain && itrack<=1 && currenttrack1.GetNSkipped()==0 && deadzoneSPD==kFALSE && ntracks[ilayer]<100) {
15dd636f 1125 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
2755f080 1126 // apply correction for material of the current layer
1127 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
b9671574 1128 vtrack->SetClIndex(ilayer,0);
ae00569a 1129 modstatus = 3; // skipped
1130 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
afd25725 1131 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
b9671574 1132 vtrack->IncrementNSkipped();
e43c066c 1133 ntracks[ilayer]++;
1134 }
628e7bb0 1135
2755f080 1136 // allow one prolongation without clusters for tracks with |tgl|>1.1
1137 if (constrain && itrack==0 && TMath::Abs(currenttrack1.GetTgl())>1.1) { //big theta - for low flux
628e7bb0 1138 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
2755f080 1139 // apply correction for material of the current layer
1140 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
b9671574 1141 vtrack->SetClIndex(ilayer,0);
ae00569a 1142 modstatus = 3; // skipped
1143 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
afd25725 1144 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
b9671574 1145 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
628e7bb0 1146 ntracks[ilayer]++;
1147 }
1148
e43c066c 1149
e50912db 1150 } // loop over tracks in layer ilayer+1
afd25725 1151
1152 //loop over track candidates for the current layer
e43c066c 1153 //
1154 //
1155 Int_t accepted=0;
1156
afd25725 1157 Int_t golden=0;
e43c066c 1158 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1159 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
afd25725 1160 if (normalizedchi2[itrack] <
1161 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
44347160 1162 if (ilayer>4) {
1163 accepted++;
1164 } else {
1165 if (constrain) { // constrain
afd25725 1166 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1167 accepted++;
44347160 1168 } else { // !constrain
afd25725 1169 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1170 accepted++;
44347160 1171 }
e43c066c 1172 }
1173 }
afd25725 1174 // sort tracks by increasing normalized chi2
1175 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
e43c066c 1176 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
afd25725 1177 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
e43c066c 1178 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
afd25725 1179 } // end loop over layers
1180
afd25725 1181
1182 //
1183 // Now select tracks to be kept
1184 //
44347160 1185 Int_t max = constrain ? 20 : 5;
e43c066c 1186
afd25725 1187 // tracks that reach layer 0 (SPD inner)
44347160 1188 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
15dd636f 1189 AliITStrackMI & track= tracks[0][nindexes[0][i]];
628e7bb0 1190 if (track.GetNumberOfClusters()<2) continue;
afd25725 1191 if (!constrain && track.GetNormChi2(0) >
6518a6c5 1192 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) {
1193 continue;
1194 }
15dd636f 1195 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1196 }
afd25725 1197
1198 // tracks that reach layer 1 (SPD outer)
628e7bb0 1199 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
15dd636f 1200 AliITStrackMI & track= tracks[1][nindexes[1][i]];
e43c066c 1201 if (track.GetNumberOfClusters()<4) continue;
afd25725 1202 if (!constrain && track.GetNormChi2(1) >
1203 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
b9671574 1204 if (constrain) track.IncrementNSkipped();
81e97e0d 1205 if (!constrain) {
b9671574 1206 track.SetD(0,track.GetD(GetX(),GetY()));
afd25725 1207 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
b9671574 1208 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1209 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 1210 }
1211 }
15dd636f 1212 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1213 }
afd25725 1214
6518a6c5 1215 // tracks that reach layer 2 (SDD inner), only during non-constrained pass
81e97e0d 1216 if (!constrain){
628e7bb0 1217 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
15dd636f 1218 AliITStrackMI & track= tracks[2][nindexes[2][i]];
628e7bb0 1219 if (track.GetNumberOfClusters()<3) continue;
afd25725 1220 if (!constrain && track.GetNormChi2(2) >
1221 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
b9671574 1222 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
81e97e0d 1223 if (!constrain){
b9671574 1224 track.SetD(0,track.GetD(GetX(),GetY()));
afd25725 1225 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
b9671574 1226 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1227 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 1228 }
1229 }
15dd636f 1230 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1231 }
1232 }
81e97e0d 1233
afd25725 1234 if (!constrain) {
81e97e0d 1235 //
afd25725 1236 // register best track of each layer - important for V0 finder
81e97e0d 1237 //
1238 for (Int_t ilayer=0;ilayer<5;ilayer++){
1239 if (ntracks[ilayer]==0) continue;
1240 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1241 if (track.GetNumberOfClusters()<1) continue;
1242 CookLabel(&track,0);
1243 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1244 }
1245 }
1246 //
1247 // update TPC V0 information
1248 //
b9671574 1249 if (otrack->GetESDtrack()->GetV0Index(0)>0){
81e97e0d 1250 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1251 for (Int_t i=0;i<3;i++){
b9671574 1252 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
81e97e0d 1253 if (index==0) break;
44347160 1254 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
81e97e0d 1255 if (vertex->GetStatus()<0) continue; // rejected V0
1256 //
6c94f330 1257 if (otrack->GetSign()>0) {
81e97e0d 1258 vertex->SetIndex(0,esdindex);
1259 }
1260 else{
1261 vertex->SetIndex(1,esdindex);
1262 }
1263 //find nearest layer with track info
b75d63a7 1264 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1265 Int_t nearestold = GetNearestLayer(xrp); //I.B.
81e97e0d 1266 Int_t nearest = nearestold;
1267 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1268 if (ntracks[nearest]==0){
1269 nearest = ilayer;
1270 }
1271 }
1272 //
1273 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1274 if (nearestold<5&&nearest<5){
b9671574 1275 Bool_t accept = track.GetNormChi2(nearest)<10;
81e97e0d 1276 if (accept){
6c94f330 1277 if (track.GetSign()>0) {
b75d63a7 1278 vertex->SetParamP(track);
81e97e0d 1279 vertex->Update(fprimvertex);
44347160 1280 //vertex->SetIndex(0,track.fESDtrack->GetID());
81e97e0d 1281 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1282 }else{
b75d63a7 1283 vertex->SetParamN(track);
81e97e0d 1284 vertex->Update(fprimvertex);
1285 //vertex->SetIndex(1,track.fESDtrack->GetID());
1286 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1287 }
1288 vertex->SetStatus(vertex->GetStatus()+1);
1289 }else{
44347160 1290 //vertex->SetStatus(-2); // reject V0 - not enough clusters
81e97e0d 1291 }
1292 }
81e97e0d 1293 }
afd25725 1294 }
1295
e43c066c 1296}
44347160 1297//------------------------------------------------------------------------
e43c066c 1298AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1299{
1300 //--------------------------------------------------------------------
1301 //
1302 //
1303 return fgLayers[layer];
1304}
44347160 1305//------------------------------------------------------------------------
8221b41b 1306AliITStrackerMI::AliITSlayer::AliITSlayer():
1307fR(0),
1308fPhiOffset(0),
1309fNladders(0),
1310fZOffset(0),
1311fNdetectors(0),
1312fDetectors(0),
1313fN(0),
1314fDy5(0),
1315fDy10(0),
1316fDy20(0),
1317fClustersCs(0),
1318fClusterIndexCs(0),
1319fYcs(0),
1320fZcs(0),
1321fNcs(0),
1322fCurrentSlice(-1),
1323fZmax(0),
1324fYmin(0),
1325fYmax(0),
1326fI(0),
1327fImax(0),
1328fSkip(0),
1329fAccepted(0),
1330fRoad(0){
e43c066c 1331 //--------------------------------------------------------------------
1332 //default AliITSlayer constructor
1333 //--------------------------------------------------------------------
e50912db 1334 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1335 fClusterWeight[i]=0;
1336 fClusterTracks[0][i]=-1;
1337 fClusterTracks[1][i]=-1;
1338 fClusterTracks[2][i]=-1;
1339 fClusterTracks[3][i]=-1;
1340 }
1341}
44347160 1342//------------------------------------------------------------------------
e43c066c 1343AliITStrackerMI::AliITSlayer::
8221b41b 1344AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1345fR(r),
1346fPhiOffset(p),
1347fNladders(nl),
1348fZOffset(z),
1349fNdetectors(nd),
1350fDetectors(0),
1351fN(0),
1352fDy5(0),
1353fDy10(0),
1354fDy20(0),
1355fClustersCs(0),
1356fClusterIndexCs(0),
1357fYcs(0),
1358fZcs(0),
1359fNcs(0),
1360fCurrentSlice(-1),
1361fZmax(0),
1362fYmin(0),
1363fYmax(0),
1364fI(0),
1365fImax(0),
1366fSkip(0),
1367fAccepted(0),
1368fRoad(0) {
e43c066c 1369 //--------------------------------------------------------------------
1370 //main AliITSlayer constructor
1371 //--------------------------------------------------------------------
e43c066c 1372 fDetectors=new AliITSdetector[fNladders*fNdetectors];
afd25725 1373 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
e43c066c 1374}
44347160 1375//------------------------------------------------------------------------
8221b41b 1376AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1377fR(layer.fR),
1378fPhiOffset(layer.fPhiOffset),
1379fNladders(layer.fNladders),
1380fZOffset(layer.fZOffset),
1381fNdetectors(layer.fNdetectors),
1382fDetectors(layer.fDetectors),
1383fN(layer.fN),
1384fDy5(layer.fDy5),
1385fDy10(layer.fDy10),
1386fDy20(layer.fDy20),
1387fClustersCs(layer.fClustersCs),
1388fClusterIndexCs(layer.fClusterIndexCs),
1389fYcs(layer.fYcs),
1390fZcs(layer.fZcs),
1391fNcs(layer.fNcs),
1392fCurrentSlice(layer.fCurrentSlice),
1393fZmax(layer.fZmax),
1394fYmin(layer.fYmin),
1395fYmax(layer.fYmax),
1396fI(layer.fI),
1397fImax(layer.fImax),
1398fSkip(layer.fSkip),
1399fAccepted(layer.fAccepted),
1400fRoad(layer.fRoad){
1401 //Copy constructor
1402}
44347160 1403//------------------------------------------------------------------------
e43c066c 1404AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1405 //--------------------------------------------------------------------
1406 // AliITSlayer destructor
1407 //--------------------------------------------------------------------
1408 delete[] fDetectors;
1409 for (Int_t i=0; i<fN; i++) delete fClusters[i];
e50912db 1410 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1411 fClusterWeight[i]=0;
1412 fClusterTracks[0][i]=-1;
1413 fClusterTracks[1][i]=-1;
1414 fClusterTracks[2][i]=-1;
1415 fClusterTracks[3][i]=-1;
1416 }
1417}
44347160 1418//------------------------------------------------------------------------
e43c066c 1419void AliITStrackerMI::AliITSlayer::ResetClusters() {
1420 //--------------------------------------------------------------------
1421 // This function removes loaded clusters
1422 //--------------------------------------------------------------------
1423 for (Int_t i=0; i<fN; i++) delete fClusters[i];
e50912db 1424 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++){
e43c066c 1425 fClusterWeight[i]=0;
1426 fClusterTracks[0][i]=-1;
1427 fClusterTracks[1][i]=-1;
1428 fClusterTracks[2][i]=-1;
1429 fClusterTracks[3][i]=-1;
1430 }
1431
1432 fN=0;
1433 fI=0;
1434}
44347160 1435//------------------------------------------------------------------------
e43c066c 1436void AliITStrackerMI::AliITSlayer::ResetWeights() {
1437 //--------------------------------------------------------------------
1438 // This function reset weights of the clusters
1439 //--------------------------------------------------------------------
e50912db 1440 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1441 fClusterWeight[i]=0;
1442 fClusterTracks[0][i]=-1;
1443 fClusterTracks[1][i]=-1;
1444 fClusterTracks[2][i]=-1;
1445 fClusterTracks[3][i]=-1;
1446 }
1447 for (Int_t i=0; i<fN;i++) {
00a7cc50 1448 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
e43c066c 1449 if (cl&&cl->IsUsed()) cl->Use();
1450 }
1451
1452}
44347160 1453//------------------------------------------------------------------------
e43c066c 1454void AliITStrackerMI::AliITSlayer::ResetRoad() {
1455 //--------------------------------------------------------------------
1456 // This function calculates the road defined by the cluster density
1457 //--------------------------------------------------------------------
1458 Int_t n=0;
1459 for (Int_t i=0; i<fN; i++) {
1460 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1461 }
afd25725 1462 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
e43c066c 1463}
44347160 1464//------------------------------------------------------------------------
afd25725 1465Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
e43c066c 1466 //--------------------------------------------------------------------
1467 //This function adds a cluster to this layer
1468 //--------------------------------------------------------------------
e50912db 1469 if (fN==AliITSRecoParam::GetMaxClusterPerLayer()) {
e43c066c 1470 ::Error("InsertCluster","Too many clusters !\n");
1471 return 1;
1472 }
1473 fCurrentSlice=-1;
afd25725 1474 fClusters[fN]=cl;
1d4090b7 1475 fN++;
afd25725 1476 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
1477 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1478 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1479 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1480 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
e43c066c 1481
1482 return 0;
1483}
44347160 1484//------------------------------------------------------------------------
e43c066c 1485void AliITStrackerMI::AliITSlayer::SortClusters()
1486{
1487 //
1488 //sort clusters
1489 //
00a7cc50 1490 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1d4090b7 1491 Float_t *z = new Float_t[fN];
1492 Int_t * index = new Int_t[fN];
1493 //
1494 for (Int_t i=0;i<fN;i++){
1495 z[i] = fClusters[i]->GetZ();
1496 }
1497 TMath::Sort(fN,z,index,kFALSE);
1498 for (Int_t i=0;i<fN;i++){
1499 clusters[i] = fClusters[index[i]];
1500 }
1501 //
1502 for (Int_t i=0;i<fN;i++){
1503 fClusters[i] = clusters[i];
1504 fZ[i] = fClusters[i]->GetZ();
1505 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1506 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1507 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1508 fY[i] = y;
1509 }
1510 delete[] index;
1511 delete[] z;
1512 delete[] clusters;
1513 //
1514
e43c066c 1515 fYB[0]=10000000;
1516 fYB[1]=-10000000;
1517 for (Int_t i=0;i<fN;i++){
1518 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1519 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1520 fClusterIndex[i] = i;
1521 }
1522 //
1523 // fill slices
1524 fDy5 = (fYB[1]-fYB[0])/5.;
1525 fDy10 = (fYB[1]-fYB[0])/10.;
1526 fDy20 = (fYB[1]-fYB[0])/20.;
1527 for (Int_t i=0;i<6;i++) fN5[i] =0;
1528 for (Int_t i=0;i<11;i++) fN10[i]=0;
1529 for (Int_t i=0;i<21;i++) fN20[i]=0;
1530 //
1531 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;}
1532 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;}
1533 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;}
1534 //
1535 //
1d4090b7 1536 for (Int_t i=0;i<fN;i++)
1537 for (Int_t irot=-1;irot<=1;irot++){
1538 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1539 // slice 5
1540 for (Int_t slice=0; slice<6;slice++){
e50912db 1541 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<AliITSRecoParam::GetMaxClusterPerLayer5()){
1d4090b7 1542 fClusters5[slice][fN5[slice]] = fClusters[i];
1543 fY5[slice][fN5[slice]] = curY;
1544 fZ5[slice][fN5[slice]] = fZ[i];
1545 fClusterIndex5[slice][fN5[slice]]=i;
1546 fN5[slice]++;
1547 }
e43c066c 1548 }
1d4090b7 1549 // slice 10
1550 for (Int_t slice=0; slice<11;slice++){
e50912db 1551 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<AliITSRecoParam::GetMaxClusterPerLayer10()){
1d4090b7 1552 fClusters10[slice][fN10[slice]] = fClusters[i];
1553 fY10[slice][fN10[slice]] = curY;
1554 fZ10[slice][fN10[slice]] = fZ[i];
1555 fClusterIndex10[slice][fN10[slice]]=i;
1556 fN10[slice]++;
1557 }
e43c066c 1558 }
1d4090b7 1559 // slice 20
1560 for (Int_t slice=0; slice<21;slice++){
e50912db 1561 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<AliITSRecoParam::GetMaxClusterPerLayer20()){
1d4090b7 1562 fClusters20[slice][fN20[slice]] = fClusters[i];
1563 fY20[slice][fN20[slice]] = curY;
1564 fZ20[slice][fN20[slice]] = fZ[i];
1565 fClusterIndex20[slice][fN20[slice]]=i;
1566 fN20[slice]++;
1567 }
1568 }
e43c066c 1569 }
1d4090b7 1570
1571 //
1572 // consistency check
1573 //
1574 for (Int_t i=0;i<fN-1;i++){
1575 if (fZ[i]>fZ[i+1]){
ae00569a 1576 printf("Bug\n");
e43c066c 1577 }
1578 }
1d4090b7 1579 //
1580 for (Int_t slice=0;slice<21;slice++)
1581 for (Int_t i=0;i<fN20[slice]-1;i++){
1582 if (fZ20[slice][i]>fZ20[slice][i+1]){
ae00569a 1583 printf("Bug\n");
1d4090b7 1584 }
1585 }
1586
1587
e43c066c 1588}
44347160 1589//------------------------------------------------------------------------
e43c066c 1590Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1591 //--------------------------------------------------------------------
1592 // This function returns the index of the nearest cluster
1593 //--------------------------------------------------------------------
1594 Int_t ncl=0;
1595 const Float_t *zcl;
1596 if (fCurrentSlice<0) {
1597 ncl = fN;
1598 zcl = fZ;
1599 }
1600 else{
1601 ncl = fNcs;
1602 zcl = fZcs;;
1603 }
1604
1605 if (ncl==0) return 0;
1606 Int_t b=0, e=ncl-1, m=(b+e)/2;
1607 for (; b<e; m=(b+e)/2) {
1608 // if (z > fClusters[m]->GetZ()) b=m+1;
1609 if (z > zcl[m]) b=m+1;
1610 else e=m;
1611 }
1612 return m;
1613}
44347160 1614//------------------------------------------------------------------------
e43c066c 1615void AliITStrackerMI::AliITSlayer::
1616SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1617 //--------------------------------------------------------------------
1618 // This function sets the "window"
1619 //--------------------------------------------------------------------
1620
628e7bb0 1621 Double_t circle=2*TMath::Pi()*fR;
e43c066c 1622 fYmin = ymin; fYmax =ymax;
1623 Float_t ymiddle = (fYmin+fYmax)*0.5;
ae00569a 1624 if (ymiddle<fYB[0]) {
1625 fYmin+=circle; fYmax+=circle; ymiddle+=circle;
1626 } else if (ymiddle>fYB[1]) {
1627 fYmin-=circle; fYmax-=circle; ymiddle-=circle;
e43c066c 1628 }
ae00569a 1629
e43c066c 1630 //
1631 fCurrentSlice =-1;
1632 // defualt take all
1633 fClustersCs = fClusters;
1634 fClusterIndexCs = fClusterIndex;
1635 fYcs = fY;
1636 fZcs = fZ;
1637 fNcs = fN;
628e7bb0 1638 //
e43c066c 1639 //is in 20 slice?
1640 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1641 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1642 if (slice<0) slice=0;
1643 if (slice>20) slice=20;
1644 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1645 if (isOK) {
1646 fCurrentSlice=slice;
1647 fClustersCs = fClusters20[fCurrentSlice];
1648 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1649 fYcs = fY20[fCurrentSlice];
1650 fZcs = fZ20[fCurrentSlice];
1651 fNcs = fN20[fCurrentSlice];
1652 }
1653 }
1654 //
1655 //is in 10 slice?
1656 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1657 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1658 if (slice<0) slice=0;
1659 if (slice>10) slice=10;
1660 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1661 if (isOK) {
1662 fCurrentSlice=slice;
1663 fClustersCs = fClusters10[fCurrentSlice];
1664 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1665 fYcs = fY10[fCurrentSlice];
1666 fZcs = fZ10[fCurrentSlice];
1667 fNcs = fN10[fCurrentSlice];
1668 }
1669 }
1670 //
1671 //is in 5 slice?
1672 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1673 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1674 if (slice<0) slice=0;
1675 if (slice>5) slice=5;
1676 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
ae00569a 1677 if (isOK) {
e43c066c 1678 fCurrentSlice=slice;
1679 fClustersCs = fClusters5[fCurrentSlice];
1680 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1681 fYcs = fY5[fCurrentSlice];
1682 fZcs = fZ5[fCurrentSlice];
1683 fNcs = fN5[fCurrentSlice];
1684 }
1685 }
628e7bb0 1686 //
e43c066c 1687 fI=FindClusterIndex(zmin); fZmax=zmax;
1688 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1689 fSkip = 0;
1690 fAccepted =0;
6518a6c5 1691
1692 return;
e43c066c 1693}
44347160 1694//------------------------------------------------------------------------
628e7bb0 1695Int_t AliITStrackerMI::AliITSlayer::
1696FindDetectorIndex(Double_t phi, Double_t z) const {
1697 //--------------------------------------------------------------------
1698 //This function finds the detector crossed by the track
1699 //--------------------------------------------------------------------
31fb8575 1700 Double_t dphi;
1701 if (fZOffset<0) // old geometry
1702 dphi = -(phi-fPhiOffset);
1703 else // new geometry
1704 dphi = phi-fPhiOffset;
1705
6518a6c5 1706
628e7bb0 1707 if (dphi < 0) dphi += 2*TMath::Pi();
1708 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1709 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1710 if (np>=fNladders) np-=fNladders;
1711 if (np<0) np+=fNladders;
1712
6518a6c5 1713
628e7bb0 1714 Double_t dz=fZOffset-z;
6518a6c5 1715 Double_t nnz = dz*(fNdetectors-1)*0.5/fZOffset+0.5;
1716 Int_t nz = (nnz<0 ? -1 : (Int_t)nnz);
628e7bb0 1717 if (nz>=fNdetectors) return -1;
1718 if (nz<0) return -1;
1719
1720 return np*fNdetectors + nz;
1721}
44347160 1722//------------------------------------------------------------------------
ae00569a 1723const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci,Bool_t test)
1724{
e43c066c 1725 //--------------------------------------------------------------------
1726 // This function returns clusters within the "window"
1727 //--------------------------------------------------------------------
1728
ae00569a 1729 if (fCurrentSlice<0) {
e43c066c 1730 Double_t rpi2 = 2.*fR*TMath::Pi();
1731 for (Int_t i=fI; i<fImax; i++) {
1732 Double_t y = fY[i];
1733 if (fYmax<y) y -= rpi2;
1d4090b7 1734 if (fYmin>y) y += rpi2;
e43c066c 1735 if (y<fYmin) continue;
1736 if (y>fYmax) continue;
1737 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1738 ci=i;
ae00569a 1739 if (!test) fI=i+1;
e43c066c 1740 return fClusters[i];
1741 }
ae00569a 1742 } else {
e43c066c 1743 for (Int_t i=fI; i<fImax; i++) {
1744 if (fYcs[i]<fYmin) continue;
1745 if (fYcs[i]>fYmax) continue;
1746 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1747 ci=fClusterIndexCs[i];
ae00569a 1748 if (!test) fI=i+1;
e43c066c 1749 return fClustersCs[i];
1750 }
1751 }
1752 return 0;
1753}
44347160 1754//------------------------------------------------------------------------
e43c066c 1755Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1756const {
1757 //--------------------------------------------------------------------
afd25725 1758 // This function returns the layer thickness at this point (units X0)
e43c066c 1759 //--------------------------------------------------------------------
1760 Double_t d=0.0085;
e50912db 1761 x0=AliITSRecoParam::GetX0Air();
e43c066c 1762 if (43<fR&&fR<45) { //SSD2
1763 Double_t dd=0.0034;
1764 d=dd;
1765 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1766 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1767 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1768 for (Int_t i=0; i<12; i++) {
1769 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1770 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1771 d+=0.0034;
1772 break;
1773 }
1774 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1775 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1776 d+=0.0034;
1777 break;
1778 }
1779 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1780 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1781 }
1782 } else
1783 if (37<fR&&fR<41) { //SSD1
1784 Double_t dd=0.0034;
1785 d=dd;
1786 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1787 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1788 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1789 for (Int_t i=0; i<11; i++) {
1790 if (TMath::Abs(z-3.9*i)<0.15) {
1791 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1792 d+=dd;
1793 break;
1794 }
1795 if (TMath::Abs(z+3.9*i)<0.15) {
1796 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1797 d+=dd;
1798 break;
1799 }
1800 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1801 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1802 }
1803 } else
1804 if (13<fR&&fR<26) { //SDD
1805 Double_t dd=0.0033;
1806 d=dd;
1807 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1808
1809 if (TMath::Abs(y-1.80)<0.55) {
1810 d+=0.016;
1811 for (Int_t j=0; j<20; j++) {
1812 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1813 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1814 }
1815 }
1816 if (TMath::Abs(y+1.80)<0.55) {
1817 d+=0.016;
1818 for (Int_t j=0; j<20; j++) {
1819 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1820 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1821 }
1822 }
1823
1824 for (Int_t i=0; i<4; i++) {
1825 if (TMath::Abs(z-7.3*i)<0.60) {
1826 d+=dd;
1827 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1828 break;
1829 }
1830 if (TMath::Abs(z+7.3*i)<0.60) {
1831 d+=dd;
1832 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1833 break;
1834 }
1835 }
1836 } else
1837 if (6<fR&&fR<8) { //SPD2
1838 Double_t dd=0.0063; x0=21.5;
1839 d=dd;
1840 if (TMath::Abs(y-3.08)>0.5) d+=dd;
afd25725 1841 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
e43c066c 1842 } else
1843 if (3<fR&&fR<5) { //SPD1
1844 Double_t dd=0.0063; x0=21.5;
1845 d=dd;
1846 if (TMath::Abs(y+0.21)>0.6) d+=dd;
afd25725 1847 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
e43c066c 1848 }
1849
1850 return d;
1851}
44347160 1852//------------------------------------------------------------------------
e50912db 1853Double_t AliITStrackerMI::GetEffectiveThickness()
e43c066c 1854{
1855 //--------------------------------------------------------------------
afd25725 1856 // Returns the thickness between the current layer and the vertex (units X0)
e43c066c 1857 //--------------------------------------------------------------------
e43c066c 1858
e50912db 1859 if(fUseTGeo!=0) {
1860 if(fxOverX0Layer[0]<0) BuildMaterialLUT("Layers");
1861 if(fxOverX0Shield[0]<0) BuildMaterialLUT("Shields");
1862 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
1863 }
1864
afd25725 1865 // beam pipe
e50912db 1866 Double_t dPipe = (fUseTGeo==0 ? AliITSRecoParam::GetdPipe() : fxOverX0Pipe);
1867 Double_t d=dPipe*AliITSRecoParam::GetrPipe()*AliITSRecoParam::GetrPipe();
afd25725 1868
1869 // layers
1870 Double_t x0=0;
e43c066c 1871 Double_t xn=fgLayers[fI].GetR();
1872 for (Int_t i=0; i<fI; i++) {
1873 Double_t xi=fgLayers[i].GetR();
e50912db 1874 Double_t dLayer = (fUseTGeo==0 ? fgLayers[i].GetThickness(0,0,x0) : fxOverX0Layer[i]);
1875 d+=dLayer*xi*xi;
e43c066c 1876 }
1877
afd25725 1878 // shields
e43c066c 1879 if (fI>1) {
e50912db 1880 Double_t dshieldSPD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(0) : fxOverX0Shield[0]);
1881 d+=dshieldSPD*AliITSRecoParam::GetrInsideShield(0)*AliITSRecoParam::GetrInsideShield(0);
e43c066c 1882 }
e43c066c 1883 if (fI>3) {
e50912db 1884 Double_t dshieldSDD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(1) : fxOverX0Shield[1]);
1885 d+=dshieldSDD*AliITSRecoParam::GetrInsideShield(1)*AliITSRecoParam::GetrInsideShield(1);
e43c066c 1886 }
e43c066c 1887 return d/(xn*xn);
1888}
44347160 1889//------------------------------------------------------------------------
e43c066c 1890Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
ae00569a 1891 //-------------------------------------------------------------------
e43c066c 1892 // This function returns number of clusters within the "window"
1893 //--------------------------------------------------------------------
1894 Int_t ncl=0;
1895 for (Int_t i=fI; i<fN; i++) {
00a7cc50 1896 const AliITSRecPoint *c=fClusters[i];
e43c066c 1897 if (c->GetZ() > fZmax) break;
1898 if (c->IsUsed()) continue;
1899 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1900 Double_t y=fR*det.GetPhi() + c->GetY();
1901
1902 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1903 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1904
1905 if (y<fYmin) continue;
1906 if (y>fYmax) continue;
1907 ncl++;
1908 }
1909 return ncl;
1910}
44347160 1911//------------------------------------------------------------------------
ae00569a 1912Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
7167ae53 1913 const AliITStrackMI *clusters,Bool_t extra, Bool_t planeeff)
ae00569a 1914{
e43c066c 1915 //--------------------------------------------------------------------
ae00569a 1916 // This function refits the track "track" at the position "x" using
1917 // the clusters from "clusters"
ef7253ac 1918 // If "extra"==kTRUE,
ae00569a 1919 // the clusters from overlapped modules get attached to "track"
7167ae53 1920 // If "planeff"==kTRUE,
1921 // special approach for plane efficiency evaluation is applyed
e43c066c 1922 //--------------------------------------------------------------------
6518a6c5 1923
e50912db 1924 Int_t index[AliITSgeomTGeo::kNLayers];
e43c066c 1925 Int_t k;
e50912db 1926 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
ae00569a 1927 Int_t nc=clusters->GetNumberOfClusters();
e43c066c 1928 for (k=0; k<nc; k++) {
ae00569a 1929 Int_t idx=clusters->GetClusterIndex(k);
1930 Int_t ilayer=(idx&0xf0000000)>>28;
1931 index[ilayer]=idx;
e43c066c 1932 }
67c1e979 1933
7167ae53 1934 return RefitAt(xx,track,index,extra,planeeff); // call the method below
67c1e979 1935}
44347160 1936//------------------------------------------------------------------------
ae00569a 1937Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
7167ae53 1938 const Int_t *clusters,Bool_t extra, Bool_t planeeff)
ae00569a 1939{
67c1e979 1940 //--------------------------------------------------------------------
ae00569a 1941 // This function refits the track "track" at the position "x" using
67c1e979 1942 // the clusters from array
ae00569a 1943 // If "extra"==kTRUE,
1944 // the clusters from overlapped modules get attached to "track"
7167ae53 1945 // If "planeff"==kTRUE,
1946 // special approach for plane efficiency evaluation is applyed
67c1e979 1947 //--------------------------------------------------------------------
e50912db 1948 Int_t index[AliITSgeomTGeo::kNLayers];
67c1e979 1949 Int_t k;
e50912db 1950 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
67c1e979 1951 //
e50912db 1952 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
ae00569a 1953 index[k]=clusters[k];
67c1e979 1954 }
1955
afd25725 1956 // special for cosmics: check which the innermost layer crossed
1957 // by the track
1958 Int_t innermostlayer=5;
ae00569a 1959 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
1960 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
1961 if(drphi < fgLayers[innermostlayer].GetR()) break;
1962 }
1963 //printf(" drphi %f innermost %d\n",drphi,innermostlayer);
afd25725 1964
ae00569a 1965 Int_t modstatus=1; // found
1966 Float_t xloc,zloc;
67c1e979 1967 Int_t from, to, step;
ae00569a 1968 if (xx > track->GetX()) {
e50912db 1969 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
67c1e979 1970 step=+1;
1971 } else {
e50912db 1972 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
67c1e979 1973 step=-1;
1974 }
ae00569a 1975 TString dir = (step>0 ? "outward" : "inward");
67c1e979 1976
ae00569a 1977 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
6518a6c5 1978 AliITSlayer &layer=fgLayers[ilayer];
67c1e979 1979 Double_t r=layer.GetR();
afd25725 1980 if (step<0 && xx>r) break;
1981
1982 // material between SSD and SDD, SDD and SPD
6518a6c5 1983 Double_t hI=ilayer-0.5*step;
e50912db 1984 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
ae00569a 1985 if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
e50912db 1986 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
ae00569a 1987 if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
67c1e979 1988
1989 // remember old position [SR, GSI 18.02.2003]
1990 Double_t oldX=0., oldY=0., oldZ=0.;
ae00569a 1991 if (track->IsStartedTimeIntegral() && step==1) {
1992 track->GetGlobalXYZat(track->GetX(),oldX,oldY,oldZ);
67c1e979 1993 }
1994 //
ae00569a 1995
afd25725 1996 Double_t oldGlobXYZ[3];
ae00569a 1997 track->GetXYZ(oldGlobXYZ);
afd25725 1998
8602c008 1999 Double_t phi,z;
ae00569a 2000 if (!track->GetPhiZat(r,phi,z)) return kFALSE;
67c1e979 2001
67c1e979 2002 Int_t idet=layer.FindDetectorIndex(phi,z);
6518a6c5 2003
2004 // check if we allow a prolongation without point for large-eta tracks
ae00569a 2005 Int_t skip = CheckSkipLayer(track,ilayer,idet);
6518a6c5 2006 if (skip==2) {
2007 // propagate to the layer radius
ae00569a 2008 Double_t xToGo; track->GetLocalXat(r,xToGo);
2009 track->AliExternalTrackParam::PropagateTo(xToGo,GetBz());
6518a6c5 2010 // apply correction for material of the current layer
ae00569a 2011 CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir);
2012 modstatus = 4; // out in z
2013 LocalModuleCoord(ilayer,idet,track,xloc,zloc); // local module coords
2014 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
6518a6c5 2015 // track time update [SR, GSI 17.02.2003]
ae00569a 2016 if (track->IsStartedTimeIntegral() && step==1) {
6518a6c5 2017 Double_t newX, newY, newZ;
ae00569a 2018 track->GetGlobalXYZat(track->GetX(),newX,newY,newZ);
6518a6c5 2019 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
2020 (oldZ-newZ)*(oldZ-newZ);
ae00569a 2021 track->AddTimeStep(TMath::Sqrt(dL2));
6518a6c5 2022 }
2023 continue;
2024 }
2025
e50912db 2026 if (idet<0) return kFALSE;
ae00569a 2027
67c1e979 2028 const AliITSdetector &det=layer.GetDetector(idet);
2029 phi=det.GetPhi();
ae00569a 2030 if (!track->Propagate(phi,det.GetR())) return kFALSE;
2031 track->SetDetectorIndex(idet);
2032 LocalModuleCoord(ilayer,idet,track,xloc,zloc); // local module coords
67c1e979 2033
ae00569a 2034 Double_t dz,zmin,zmax;
2035
2036 const AliITSRecPoint *clAcc=0;
44347160 2037 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
67c1e979 2038
6518a6c5 2039 Int_t idx=index[ilayer];
ae00569a 2040 if (idx>=0) { // cluster in this layer
2041 modstatus = 6; // no refit
2042 const AliITSRecPoint *cl=(AliITSRecPoint *)GetCluster(idx);
2043 if (cl) {
2044 if (idet != cl->GetDetectorIndex()) {
2045 idet=cl->GetDetectorIndex();
2046 const AliITSdetector &det=layer.GetDetector(idet);
2047 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
2048 track->SetDetectorIndex(idet);
2049 LocalModuleCoord(ilayer,idet,track,xloc,zloc); // local module coords
2050 }
2051 //Double_t chi2=track->GetPredictedChi2(cl);
2052 Int_t cllayer = (idx & 0xf0000000) >> 28;;
2053 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
2054 if (chi2<maxchi2) {
2055 clAcc=cl;
2056 maxchi2=chi2;
2057 modstatus = 1; // found
2058 } else {
7167ae53 2059 return kFALSE; //
ae00569a 2060 }
2061 }
2062 } else { // no cluster in this layer
2063 if (skip==1) {
2064 modstatus = 3; // skipped
8a32c4b5 2065 // Plane Eff determination:
2066 if (planeeff && AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilayer)) {
7167ae53 2067 if (IsOKForPlaneEff(track,ilayer)) // only adequate track for plane eff. evaluation
2068 UseTrackForPlaneEff(track,ilayer);
2069 }
ae00569a 2070 } else {
2071 modstatus = 5; // no cls in road
2072 // check dead
2073 dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
2074 TMath::Sqrt(track->GetSigmaZ2() +
2075 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
2076 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
2077 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
2078 zmin=track->GetZ() - dz;
2079 zmax=track->GetZ() + dz;
2080 Int_t dead = CheckDeadZone(ilayer,idet,zmin,zmax);
2081 if (dead==1) modstatus = 7; // holes in z in SPD
2082 if (dead==2) modstatus = 2; // dead from OCDB
2083 }
e43c066c 2084 }
ae00569a 2085
2086 if (clAcc) {
2087 if (!UpdateMI(track,clAcc,maxchi2,idx)) return kFALSE;
2088 track->SetSampledEdx(clAcc->GetQ(),track->GetNumberOfClusters()-1);
e43c066c 2089 }
ae00569a 2090 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2091
2092
2093 if (extra) { // search for extra clusters in overlapped modules
2094 AliITStrackV2 tmp(*track);
2095 Double_t dy,ymin,ymax;
2096 dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
2097 if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
2098 dy=4*TMath::Sqrt(track->GetSigmaY2()+AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
2099 if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
2100 zmin=track->GetZ() - dz;
2101 zmax=track->GetZ() + dz;
2102 ymin=track->GetY() + phi*r - dy;
2103 ymax=track->GetY() + phi*r + dy;
2104 layer.SelectClusters(zmin,zmax,ymin,ymax);
2105
2106 const AliITSRecPoint *clExtra=0; Int_t ci=-1,cci=-1;
2107 Int_t idetExtra=-1;
2108 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2(), tolerance=0.1;
2109 while ((clExtra=layer.GetNextCluster(ci))!=0) {
2110 // only clusters in another module! (overlaps)
2111 idetExtra = clExtra->GetDetectorIndex();
2112 if (idet == idetExtra) continue;
2113
2114 const AliITSdetector &det=layer.GetDetector(idetExtra);
2115
2116 if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
2117
2118 if (TMath::Abs(tmp.GetZ() - clExtra->GetZ()) > tolerance) continue;
2119 if (TMath::Abs(tmp.GetY() - clExtra->GetY()) > tolerance) continue;
2120
2121 Double_t chi2=tmp.GetPredictedChi2(clExtra);
2122 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
2123 }
2124 if (cci>=0) {
2125 track->SetExtraCluster(ilayer,(ilayer<<28)+cci);
2126 track->SetExtraModule(ilayer,idetExtra);
2127 }
2128 } // end search for extra clusters in overlapped modules
2129
afd25725 2130 // Correct for material of the current layer
ae00569a 2131 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)) return kFALSE;
e43c066c 2132
2133 // track time update [SR, GSI 17.02.2003]
ae00569a 2134 if (track->IsStartedTimeIntegral() && step==1) {
e43c066c 2135 Double_t newX, newY, newZ;
ae00569a 2136 track->GetGlobalXYZat(track->GetX(),newX,newY,newZ);
e43c066c 2137 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
2138 (oldZ-newZ)*(oldZ-newZ);
ae00569a 2139 track->AddTimeStep(TMath::Sqrt(dL2));
e43c066c 2140 }
2141 //
2142
ae00569a 2143 } // end loop on layers
2144
2145 if (!track->PropagateTo(xx,0.,0.)) return kFALSE;
e43c066c 2146
e43c066c 2147 return kTRUE;
2148}
44347160 2149//------------------------------------------------------------------------
15dd636f 2150Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
e43c066c 2151{
2152 //
2153 // calculate normalized chi2
2154 // return NormalizedChi2(track,0);
2155 Float_t chi2 = 0;
2156 Float_t sum=0;
2157 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2158 // track->fdEdxMismatch=0;
2159 Float_t dedxmismatch =0;
2160 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2161 if (mode<100){
2162 for (Int_t i = 0;i<6;i++){
b9671574 2163 if (track->GetClIndex(i)>0){
e43c066c 2164 Float_t cerry, cerrz;
2165 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2166 else
b9671574 2167 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2168 cerry*=cerry;
2169 cerrz*=cerrz;
b9671574 2170 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
572f41f9 2171 if (i>1 && AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(i)) {
b9671574 2172 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
e43c066c 2173 if (ratio<0.5) {
2174 cchi2+=(0.5-ratio)*10.;
2175 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2176 dedxmismatch+=(0.5-ratio)*10.;
2177 }
2178 }
2179 if (i<2 ||i>3){
b9671574 2180 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
e43c066c 2181 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2182 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2183 if (i<2) chi2+=2*cl->GetDeltaProbability();
2184 }
2185 chi2+=cchi2;
2186 sum++;
2187 }
2188 }
b9671574 2189 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2190 track->SetdEdxMismatch(dedxmismatch);
e43c066c 2191 }
2192 }
2193 else{
2194 for (Int_t i = 0;i<4;i++){
b9671574 2195 if (track->GetClIndex(i)>0){
e43c066c 2196 Float_t cerry, cerrz;
2197 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 2198 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2199 cerry*=cerry;
2200 cerrz*=cerrz;
b9671574 2201 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2202 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 2203 sum++;
2204 }
2205 }
2206 for (Int_t i = 4;i<6;i++){
b9671574 2207 if (track->GetClIndex(i)>0){
e43c066c 2208 Float_t cerry, cerrz;
2209 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 2210 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2211 cerry*=cerry;
2212 cerrz*=cerrz;
2213 Float_t cerryb, cerrzb;
2214 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
b9671574 2215 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
e43c066c 2216 cerryb*=cerryb;
2217 cerrzb*=cerrzb;
b9671574 2218 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2219 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 2220 sum++;
2221 }
2222 }
2223 }
b9671574 2224 if (track->GetESDtrack()->GetTPCsignal()>85){
2225 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
e43c066c 2226 if (ratio<0.5) {
2227 chi2+=(0.5-ratio)*5.;
2228 }
2229 if (ratio>2){
2230 chi2+=(ratio-2.0)*3;
2231 }
2232 }
2233 //
b9671574 2234 Double_t match = TMath::Sqrt(track->GetChi22());
2235 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2755f080 2236 if (!track->GetConstrain()) {
2237 if (track->GetNumberOfClusters()>2) {
2238 match/=track->GetNumberOfClusters()-2.;
2239 } else {
2240 match=0;
2241 }
2242 }
e43c066c 2243 if (match<0) match=0;
b9671574 2244 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2245 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2246 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2247 1./(1.+track->GetNSkipped()));
e43c066c 2248
2249 return normchi2;
2250}
44347160 2251//------------------------------------------------------------------------
15dd636f 2252Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
e43c066c 2253{
2254 //
2255 // return matching chi2 between two tracks
15dd636f 2256 AliITStrackMI track3(*track2);
e43c066c 2257 track3.Propagate(track1->GetAlpha(),track1->GetX());
2258 TMatrixD vec(5,1);
6c94f330 2259 vec(0,0)=track1->GetY() - track3.GetY();
2260 vec(1,0)=track1->GetZ() - track3.GetZ();
2261 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2262 vec(3,0)=track1->GetTgl() - track3.GetTgl();
6c23ffed 2263 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
e43c066c 2264 //
2265 TMatrixD cov(5,5);
6c94f330 2266 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2267 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2268 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2269 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2270 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
e43c066c 2271
6c94f330 2272 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2273 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2274 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2275 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
e43c066c 2276 //
6c94f330 2277 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2278 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2279 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
e43c066c 2280 //
6c94f330 2281 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2282 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
e43c066c 2283 //
6c94f330 2284 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
e43c066c 2285
2286 cov.Invert();
2287 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2288 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2289 return chi2(0,0);
2290}
44347160 2291//------------------------------------------------------------------------
6518a6c5 2292Double_t AliITStrackerMI::GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr)
e43c066c 2293{
2294 //
afd25725 2295 // return probability that given point (characterized by z position and error)
2296 // is in SPD dead zone
e43c066c 2297 //
afd25725 2298 Double_t probability = 0.;
e43c066c 2299 Double_t absz = TMath::Abs(zpos);
afd25725 2300 Double_t nearestz = (absz<2.) ? 0.5*(fSPDdetzcentre[1]+fSPDdetzcentre[2]) :
2301 0.5*(fSPDdetzcentre[2]+fSPDdetzcentre[3]);
2302 if (TMath::Abs(absz-nearestz)>0.25+3.*zerr) return probability;
2303 Double_t zmin, zmax;
2304 if (zpos<-6.) { // dead zone at z = -7
e50912db 2305 zmin = fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2306 zmax = fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2307 } else if (zpos>6.) { // dead zone at z = +7
e50912db 2308 zmin = fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2309 zmax = fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2310 } else if (absz<2.) { // dead zone at z = 0
e50912db 2311 zmin = fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2312 zmax = fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2313 } else {
2314 zmin = 0.;
2315 zmax = 0.;
e43c066c 2316 }
afd25725 2317 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2318 // dead zone)
2319 probability = 0.5*( TMath::Erf((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2320 TMath::Erf((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
e43c066c 2321 return probability;
2322}
44347160 2323//------------------------------------------------------------------------
15dd636f 2324Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
e43c066c 2325{
2326 //
2327 // calculate normalized chi2
2328 Float_t chi2[6];
2329 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2330 Float_t ncl = 0;
2331 for (Int_t i = 0;i<6;i++){
b9671574 2332 if (TMath::Abs(track->GetDy(i))>0){
2333 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2334 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
e43c066c 2335 ncl++;
2336 }
2337 else{chi2[i]=10000;}
2338 }
2339 Int_t index[6];
2340 TMath::Sort(6,chi2,index,kFALSE);
2341 Float_t max = float(ncl)*fac-1.;
2342 Float_t sumchi=0, sumweight=0;
2343 for (Int_t i=0;i<max+1;i++){
2344 Float_t weight = (i<max)?1.:(max+1.-i);
2345 sumchi+=weight*chi2[index[i]];
2346 sumweight+=weight;
2347 }
2348 Double_t normchi2 = sumchi/sumweight;
2349 return normchi2;
2350}
44347160 2351//------------------------------------------------------------------------
15dd636f 2352Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
e43c066c 2353{
2354 //
2355 // calculate normalized chi2
2356 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2357 Int_t npoints = 0;
2358 Double_t res =0;
2359 for (Int_t i=0;i<6;i++){
b9671574 2360 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2361 Double_t sy1 = forwardtrack->GetSigmaY(i);
2362 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2363 Double_t sy2 = backtrack->GetSigmaY(i);
2364 Double_t sz2 = backtrack->GetSigmaZ(i);
e43c066c 2365 if (i<2){ sy2=1000.;sz2=1000;}
2366 //
b9671574 2367 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2368 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
e43c066c 2369 //
2370 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2371 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2372 //
2373 res+= nz0*nz0+ny0*ny0;
2374 npoints++;
2375 }
2376 if (npoints>1) return
6c23ffed 2377 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
e43c066c 2378 //2*forwardtrack->fNUsed+
b9671574 2379 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2380 1./(1.+forwardtrack->GetNSkipped()));
e43c066c 2381 return 1000;
2382}
44347160 2383//------------------------------------------------------------------------
e43c066c 2384Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2385 //--------------------------------------------------------------------
2386 // Return pointer to a given cluster
2387 //--------------------------------------------------------------------
2388 Int_t l=(index & 0xf0000000) >> 28;
2389 Int_t c=(index & 0x0fffffff) >> 00;
2390 return fgLayers[l].GetWeight(c);
2391}
44347160 2392//------------------------------------------------------------------------
15dd636f 2393void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
e43c066c 2394{
2395 //---------------------------------------------
2396 // register track to the list
628e7bb0 2397 //
b9671574 2398 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
628e7bb0 2399 //
2400 //
e43c066c 2401 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2402 Int_t index = track->GetClusterIndex(icluster);
2403 Int_t l=(index & 0xf0000000) >> 28;
2404 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2405 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2406 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2407 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2408 fgLayers[l].SetClusterTracks(itrack,c,id);
e43c066c 2409 break;
2410 }
2411 }
2412 }
2413}
44347160 2414//------------------------------------------------------------------------
15dd636f 2415void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
e43c066c 2416{
2417 //---------------------------------------------
2418 // unregister track from the list
2419 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2420 Int_t index = track->GetClusterIndex(icluster);
2421 Int_t l=(index & 0xf0000000) >> 28;
2422 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2423 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2424 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2425 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2426 fgLayers[l].SetClusterTracks(itrack,c,-1);
e43c066c 2427 }
2428 }
2429 }
2430}
44347160 2431//------------------------------------------------------------------------
00a7cc50 2432Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
e43c066c 2433{
2434 //-------------------------------------------------------------
2435 //get number of shared clusters
2436 //-------------------------------------------------------------
2437 Float_t shared=0;
2438 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2439 // mean number of clusters
2440 Float_t *ny = GetNy(id), *nz = GetNz(id);
2441
2442
2443 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2444 Int_t index = track->GetClusterIndex(icluster);
2445 Int_t l=(index & 0xf0000000) >> 28;
2446 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2447 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2448 if (ny[l]==0){
2449 printf("problem\n");
2450 }
00a7cc50 2451 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2452 Float_t weight=1;
2453 //
2454 Float_t deltan = 0;
2455 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
572f41f9 2456 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2457 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2458 if (l<2 || l>3){
2459 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2460 }
2461 else{
2462 deltan = (cl->GetNz()-nz[l]);
2463 }
2464 if (deltan>2.0) continue; // extended - highly probable shared cluster
2465 weight = 2./TMath::Max(3.+deltan,2.);
2466 //
2467 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2468 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
e43c066c 2469 list[l]=index;
00a7cc50 2470 clist[l] = (AliITSRecPoint*)GetCluster(index);
e43c066c 2471 shared+=weight;
2472 break;
2473 }
2474 }
2475 }
b9671574 2476 track->SetNUsed(shared);
e43c066c 2477 return shared;
2478}
44347160 2479//------------------------------------------------------------------------
15dd636f 2480Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
e43c066c 2481{
2482 //
2483 // find first shared track
2484 //
2485 // mean number of clusters
2486 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2487 //
2488 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2489 Int_t sharedtrack=100000;
2490 Int_t tracks[24],trackindex=0;
2491 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2492 //
2493 for (Int_t icluster=0;icluster<6;icluster++){
2494 if (clusterlist[icluster]<0) continue;
2495 Int_t index = clusterlist[icluster];
2496 Int_t l=(index & 0xf0000000) >> 28;
2497 Int_t c=(index & 0x0fffffff) >> 00;
2498 if (ny[l]==0){
2499 printf("problem\n");
2500 }
b9671574 2501 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2502 //if (l>3) continue;
00a7cc50 2503 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2504 //
2505 Float_t deltan = 0;
2506 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
572f41f9 2507 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2508 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2509 if (l<2 || l>3){
2510 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2511 }
2512 else{
2513 deltan = (cl->GetNz()-nz[l]);
2514 }
2515 if (deltan>2.0) continue; // extended - highly probable shared cluster
2516 //
2517 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2518 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2519 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2520 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
e43c066c 2521 trackindex++;
2522 }
2523 }
2524 }
2525 if (trackindex==0) return -1;
2526 if (trackindex==1){
2527 sharedtrack = tracks[0];
2528 }else{
2529 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2530 else{
2531 //
2532 Int_t track[24], cluster[24];
2533 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
2534 Int_t index =0;
2535 //
2536 for (Int_t i=0;i<trackindex;i++){
2537 if (tracks[i]<0) continue;
2538 track[index] = tracks[i];
2539 cluster[index]++;
2540 for (Int_t j=i+1;j<trackindex;j++){
2541 if (tracks[j]<0) continue;
2542 if (tracks[j]==tracks[i]){
2543 cluster[index]++;
2544 tracks[j]=-1;
2545 }
2546 }
2547 index++;
2548 }
2549 Int_t max=0;
2550 for (Int_t i=0;i<index;i++){
2551 if (cluster[index]>max) {
2552 sharedtrack=track[index];
2553 max=cluster[index];
2554 }
2555 }
2556 }
2557 }
2558
2559 if (sharedtrack>=100000) return -1;
2560 //
2561 // make list of overlaps
2562 shared =0;
2563 for (Int_t icluster=0;icluster<6;icluster++){
2564 if (clusterlist[icluster]<0) continue;
2565 Int_t index = clusterlist[icluster];
2566 Int_t l=(index & 0xf0000000) >> 28;
2567 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2568 if (c>fgLayers[l].GetNumberOfClusters()) continue;
00a7cc50 2569 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2570 if (l==0 || l==1){
2571 if (cl->GetNy()>2) continue;
2572 if (cl->GetNz()>2) continue;
2573 }
2574 if (l==4 || l==5){
2575 if (cl->GetNy()>3) continue;
2576 if (cl->GetNz()>3) continue;
2577 }
2578 //
2579 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2580 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2581 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
e43c066c 2582 overlist[l]=index;
2583 shared++;
2584 }
2585 }
2586 }
2587 return sharedtrack;
2588}
44347160 2589//------------------------------------------------------------------------
15dd636f 2590AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
e43c066c 2591 //
2592 // try to find track hypothesys without conflicts
2593 // with minimal chi2;
2594 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2595 Int_t entries1 = arr1->GetEntriesFast();
2596 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
15dd636f 2597 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2598 Int_t entries2 = arr2->GetEntriesFast();
15dd636f 2599 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2600 //
15dd636f 2601 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2602 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
6c23ffed 2603 if (track10->Pt()>0.5+track20->Pt()) return track10;
e43c066c 2604
2605 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2606 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2607 UnRegisterClusterTracks(track,trackID1);
2608 }
2609 //
2610 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2611 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2612 UnRegisterClusterTracks(track,trackID2);
2613 }
2614 Int_t index1=0;
2615 Int_t index2=0;
2616 Float_t maxconflicts=6;
2617 Double_t maxchi2 =1000.;
2618 //
2619 // get weight of hypothesys - using best hypothesy
2620 Double_t w1,w2;
2621
2622 Int_t list1[6],list2[6];
00a7cc50 2623 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2624 RegisterClusterTracks(track10,trackID1);
2625 RegisterClusterTracks(track20,trackID2);
2626 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2627 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2628 UnRegisterClusterTracks(track10,trackID1);
2629 UnRegisterClusterTracks(track20,trackID2);
2630 //
2631 // normalized chi2
2632 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2633 Float_t nerry[6],nerrz[6];
2634 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2635 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2636 for (Int_t i=0;i<6;i++){
2637 if ( (erry1[i]>0) && (erry2[i]>0)) {
2638 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2639 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2640 }else{
2641 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2642 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2643 }
b9671574 2644 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2645 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2646 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2647 ncl1++;
2648 }
b9671574 2649 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2650 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2651 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2652 ncl2++;
2653 }
2654 }
2655 chi21/=ncl1;
2656 chi22/=ncl2;
2657 //
2658 //
b9671574 2659 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2660 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
e43c066c 2661 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2662 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2663 //
2664 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2665 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
6c23ffed 2666 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
e43c066c 2667 );
2668 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2669 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
6c23ffed 2670 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
e43c066c 2671 );
2672
2673 Double_t sumw = w1+w2;
2674 w1/=sumw;
2675 w2/=sumw;
2676 if (w1<w2*0.5) {
2677 w1 = (d2+0.5)/(d1+d2+1.);
2678 w2 = (d1+0.5)/(d1+d2+1.);
2679 }
2680 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2681 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2682 //
2683 // get pair of "best" hypothesys
2684 //
2685 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2686 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2687
2688 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
15dd636f 2689 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
e43c066c 2690 //if (track1->fFakeRatio>0) continue;
2691 RegisterClusterTracks(track1,trackID1);
2692 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
15dd636f 2693 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
e43c066c 2694
2695 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2696 //if (track2->fFakeRatio>0) continue;
2697 Float_t nskipped=0;
2698 RegisterClusterTracks(track2,trackID2);
2699 Int_t list1[6],list2[6];
00a7cc50 2700 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2701 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2702 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2703 UnRegisterClusterTracks(track2,trackID2);
2704 //
b9671574 2705 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2706 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
e43c066c 2707 if (nskipped>0.5) continue;
2708 //
2709 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2710 if (conflict1+1<cconflict1) continue;
2711 if (conflict2+1<cconflict2) continue;
2712 Float_t conflict=0;
2713 Float_t sumchi2=0;
2714 Float_t sum=0;
2715 for (Int_t i=0;i<6;i++){
2716 //
2717 Float_t c1 =0.; // conflict coeficients
2718 Float_t c2 =0.;
2719 if (clist1[i]&&clist2[i]){
2720 Float_t deltan = 0;
2721 if (i<2 || i>3){
2722 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2723 }
2724 else{
2725 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2726 }
2727 c1 = 2./TMath::Max(3.+deltan,2.);
2728 c2 = 2./TMath::Max(3.+deltan,2.);
2729 }
2730 else{
2731 if (clist1[i]){
2732 Float_t deltan = 0;
2733 if (i<2 || i>3){
2734 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2735 }
2736 else{
2737 deltan = (clist1[i]->GetNz()-nz1[i]);
2738 }
2739 c1 = 2./TMath::Max(3.+deltan,2.);
2740 c2 = 0;
2741 }
2742
2743 if (clist2[i]){
2744 Float_t deltan = 0;
2745 if (i<2 || i>3){
2746 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2747 }
2748 else{
2749 deltan = (clist2[i]->GetNz()-nz2[i]);
2750 }
2751 c2 = 2./TMath::Max(3.+deltan,2.);
2752 c1 = 0;
2753 }
2754 }
2755 //
2756 Double_t chi21=0,chi22=0;
b9671574 2757 if (TMath::Abs(track1->GetDy(i))>0.) {
2758 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2759 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
e43c066c 2760 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
b9671574 2761 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
e43c066c 2762 }else{
b9671574 2763 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
e43c066c 2764 }
2765 //
b9671574 2766 if (TMath::Abs(track2->GetDy(i))>0.) {
2767 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2768 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
e43c066c 2769 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2770 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2771 }
2772 else{
b9671574 2773 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
e43c066c 2774 }
2775 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2776 if (chi21>0) sum+=w1;
2777 if (chi22>0) sum+=w2;
2778 conflict+=(c1+c2);
2779 }
b9671574 2780 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2781 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
e43c066c 2782 Double_t normchi2 = 2*conflict+sumchi2/sum;
2783 if ( normchi2 <maxchi2 ){
2784 index1 = itrack1;
2785 index2 = itrack2;
2786 maxconflicts = conflict;
2787 maxchi2 = normchi2;
2788 }
2789 }
2790 UnRegisterClusterTracks(track1,trackID1);
2791 }
2792 //
2793 // if (maxconflicts<4 && maxchi2<th0){
2794 if (maxchi2<th0*2.){
b9671574 2795 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
15dd636f 2796 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
b9671574 2797 track1->SetChi2MIP(5,maxconflicts);
2798 track1->SetChi2MIP(6,maxchi2);
2799 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
e43c066c 2800 // track1->UpdateESDtrack(AliESDtrack::kITSin);
b9671574 2801 track1->SetChi2MIP(8,index1);
e43c066c 2802 fBestTrackIndex[trackID1] =index1;
2803 UpdateESDtrack(track1, AliESDtrack::kITSin);
2804 }
b9671574 2805 else if (track10->GetChi2MIP(0)<th1){
2806 track10->SetChi2MIP(5,maxconflicts);
2807 track10->SetChi2MIP(6,maxchi2);
e43c066c 2808 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2809 UpdateESDtrack(track10,AliESDtrack::kITSin);
2810 }
2811
2812 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2813 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2814 UnRegisterClusterTracks(track,trackID1);
2815 }
2816 //
2817 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2818 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2819 UnRegisterClusterTracks(track,trackID2);
2820 }
2821
44347160 2822 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2823 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2824 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2825 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
e43c066c 2826 RegisterClusterTracks(track10,trackID1);
2827 }
44347160 2828 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2829 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2830 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2831 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
e43c066c 2832 RegisterClusterTracks(track20,trackID2);
2833 }
2834 return track10;
2835
2836}
44347160 2837//------------------------------------------------------------------------
e43c066c 2838void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2839 //--------------------------------------------------------------------
2840 // This function marks clusters assigned to the track
2841 //--------------------------------------------------------------------
2842 AliTracker::UseClusters(t,from);
2843
00a7cc50 2844 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
e43c066c 2845 //if (c->GetQ()>2) c->Use();
2846 if (c->GetSigmaZ2()>0.1) c->Use();
00a7cc50 2847 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
e43c066c 2848 //if (c->GetQ()>2) c->Use();
2849 if (c->GetSigmaZ2()>0.1) c->Use();
2850
2851}
44347160 2852//------------------------------------------------------------------------
15dd636f 2853void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
e43c066c 2854{
2855 //------------------------------------------------------------------
2856 // add track to the list of hypothesys
2857 //------------------------------------------------------------------
2858
fddf8459 2859 if (esdindex>=fTrackHypothesys.GetEntriesFast())
2860 fTrackHypothesys.Expand(TMath::Max(fTrackHypothesys.GetSize(),esdindex*2+10));
e43c066c 2861 //
2862 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2863 if (!array) {
2864 array = new TObjArray(10);
2865 fTrackHypothesys.AddAt(array,esdindex);
2866 }
2867 array->AddLast(track);
2868}
44347160 2869//------------------------------------------------------------------------
e43c066c 2870void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2871{
2872 //-------------------------------------------------------------------
2873 // compress array of track hypothesys
2874 // keep only maxsize best hypothesys
2875 //-------------------------------------------------------------------
2876 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2877 if (! (fTrackHypothesys.At(esdindex)) ) return;
2878 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2879 Int_t entries = array->GetEntriesFast();
2880 //
2881 //- find preliminary besttrack as a reference
2882 Float_t minchi2=10000;
2883 Int_t maxn=0;
15dd636f 2884 AliITStrackMI * besttrack=0;
e43c066c 2885 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
15dd636f 2886 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2887 if (!track) continue;
2888 Float_t chi2 = NormalizedChi2(track,0);
2889 //
b9671574 2890 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
e43c066c 2891 track->SetLabel(tpcLabel);
2892 CookdEdx(track);
b9671574 2893 track->SetFakeRatio(1.);
e43c066c 2894 CookLabel(track,0.); //For comparison only
2895 //
44347160 2896 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
2897 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
e43c066c 2898 if (track->GetNumberOfClusters()<maxn) continue;
2899 maxn = track->GetNumberOfClusters();
2900 if (chi2<minchi2){
2901 minchi2=chi2;
2902 besttrack=track;
2903 }
2904 }
2905 else{
b9671574 2906 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2907 delete array->RemoveAt(itrack);
2908 }
e43c066c 2909 }
2910 }
2911 if (!besttrack) return;
2912 //
2913 //
2914 //take errors of best track as a reference
2915 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2916 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2917 for (Int_t i=0;i<6;i++) {
b9671574 2918 if (besttrack->GetClIndex(i)>0){
2919 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2920 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2921 ny[i] = besttrack->GetNy(i);
2922 nz[i] = besttrack->GetNz(i);
e43c066c 2923 }
2924 }
2925 //
2926 // calculate normalized chi2
2927 //
2928 Float_t * chi2 = new Float_t[entries];
2929 Int_t * index = new Int_t[entries];
2930 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2931 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2932 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2933 if (track){
b9671574 2934 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
44347160 2935 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
b9671574 2936 chi2[itrack] = track->GetChi2MIP(0);
628e7bb0 2937 else{
b9671574 2938 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2939 delete array->RemoveAt(itrack);
2940 }
2941 }
e43c066c 2942 }
2943 }
2944 //
2945 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2946 besttrack = (AliITStrackMI*)array->At(index[0]);
44347160 2947 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
e43c066c 2948 for (Int_t i=0;i<6;i++){
b9671574 2949 if (besttrack->GetClIndex(i)>0){
2950 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2951 errz[i] = besttrack->GetSigmaZ(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2952 ny[i] = besttrack->GetNy(i);
2953 nz[i] = besttrack->GetNz(i);
e43c066c 2954 }
2955 }
2956 }
2957 //
2958 // calculate one more time with updated normalized errors
2959 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2960 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2961 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2962 if (track){
b9671574 2963 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
44347160 2964 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
b9671574 2965 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
628e7bb0 2966 else
2967 {
b9671574 2968 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2969 delete array->RemoveAt(itrack);
2970 }
2971 }
e43c066c 2972 }
2973 }
2974 entries = array->GetEntriesFast();
2975 //
628e7bb0 2976 //
e43c066c 2977 if (entries>0){
2978 TObjArray * newarray = new TObjArray();
2979 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2980 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2981 if (besttrack){
2982 //
2983 for (Int_t i=0;i<6;i++){
b9671574 2984 if (besttrack->GetNz(i)>0&&besttrack->GetNy(i)>0){
2985 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2986 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2987 ny[i] = besttrack->GetNy(i);
2988 nz[i] = besttrack->GetNz(i);
e43c066c 2989 }
2990 }
b9671574 2991 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
44347160 2992 Float_t minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
e43c066c 2993 Float_t minn = besttrack->GetNumberOfClusters()-3;
2994 Int_t accepted=0;
2995 for (Int_t i=0;i<entries;i++){
15dd636f 2996 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
e43c066c 2997 if (!track) continue;
2998 if (accepted>maxcut) break;
b9671574 2999 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3000 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3001 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
628e7bb0 3002 delete array->RemoveAt(index[i]);
3003 continue;
3004 }
e43c066c 3005 }
b9671574 3006 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
3007 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
628e7bb0 3008 if (!shortbest) accepted++;
e43c066c 3009 //
3010 newarray->AddLast(array->RemoveAt(index[i]));
3011 for (Int_t i=0;i<6;i++){
3012 if (nz[i]==0){
b9671574 3013 erry[i] = track->GetSigmaY(i); erry[i+6] = track->GetSigmaY(i+6);
3014 errz[i] = track->GetSigmaZ(i); errz[i] = track->GetSigmaZ(i+6);
3015 ny[i] = track->GetNy(i);
3016 nz[i] = track->GetNz(i);
e43c066c 3017 }