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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 **************************************************************************/
9a5326b1 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>
afd25725 33
bf6adc12 34
af885e0f 35#include "AliESDEvent.h"
aad72f45 36#include "AliESDtrack.h"
9a5326b1 37#include "AliESDVertex.h"
6c94f330 38#include "AliV0.h"
bf6adc12 39#include "AliHelix.h"
00a7cc50 40#include "AliITSRecPoint.h"
e341247d 41#include "AliITSgeomTGeo.h"
e43c066c 42#include "AliITStrackerMI.h"
44347160 43#include "AliITSReconstructor.h"
df29e9a4 44#include "AliTrackPointArray.h"
45#include "AliAlignObj.h"
572f41f9 46#include "AliITSClusterParam.h"
4a66240a 47#include "AliITSPlaneEff.h"
e43c066c 48
49ClassImp(AliITStrackerMI)
e43c066c 50
e50912db 51AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[AliITSgeomTGeo::kNLayers]; // ITS layers
44347160 52
8221b41b 53AliITStrackerMI::AliITStrackerMI():AliTracker(),
54fI(0),
55fBestTrack(),
56fTrackToFollow(),
57fTrackHypothesys(),
58fBestHypothesys(),
59fOriginal(),
60fCurrentEsdTrack(),
61fPass(0),
62fAfterV0(kFALSE),
63fLastLayerToTrackTo(0),
afd25725 64fCoefficients(0),
8221b41b 65fEsd(0),
e50912db 66fTrackingPhase("Default"),
6518a6c5 67fUseTGeo(3),
e50912db 68fNtracks(0),
69fxOverX0Pipe(-1.),
70fxTimesRhoPipe(-1.),
71fxOverX0PipeTrks(0),
72fxTimesRhoPipeTrks(0),
73fxOverX0ShieldTrks(0),
74fxTimesRhoShieldTrks(0),
75fxOverX0LayerTrks(0),
76fxTimesRhoLayerTrks(0),
4a66240a 77fDebugStreamer(0),
78fPlaneEff(0){
8221b41b 79 //Default constructor
e50912db 80 Int_t i;
81 for(i=0;i<4;i++) fSPDdetzcentre[i]=0.;
82 for(i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
83 for(i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
8221b41b 84}
44347160 85//------------------------------------------------------------------------
1f3e997f 86AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
e50912db 87fI(AliITSgeomTGeo::GetNLayers()),
8221b41b 88fBestTrack(),
89fTrackToFollow(),
90fTrackHypothesys(),
91fBestHypothesys(),
92fOriginal(),
93fCurrentEsdTrack(),
94fPass(0),
95fAfterV0(kFALSE),
e50912db 96fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()),
afd25725 97fCoefficients(0),
8221b41b 98fEsd(0),
e50912db 99fTrackingPhase("Default"),
6518a6c5 100fUseTGeo(3),
e50912db 101fNtracks(0),
102fxOverX0Pipe(-1.),
103fxTimesRhoPipe(-1.),
104fxOverX0PipeTrks(0),
105fxTimesRhoPipeTrks(0),
106fxOverX0ShieldTrks(0),
107fxTimesRhoShieldTrks(0),
108fxOverX0LayerTrks(0),
109fxTimesRhoLayerTrks(0),
4a66240a 110fDebugStreamer(0),
111fPlaneEff(0){
e43c066c 112 //--------------------------------------------------------------------
113 //This is the AliITStrackerMI constructor
114 //--------------------------------------------------------------------
e341247d 115 if (geom) {
116 AliWarning("\"geom\" is actually a dummy argument !");
117 }
118
afd25725 119 fCoefficients = 0;
628e7bb0 120 fAfterV0 = kFALSE;
e341247d 121
e50912db 122 for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
e341247d 123 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
124 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
125
126 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
127 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
e43c066c 128 Double_t poff=TMath::ATan2(y,x);
129 Double_t zoff=z;
e341247d 130 Double_t r=TMath::Sqrt(x*x + y*y);
e43c066c 131
e341247d 132 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
e43c066c 133 r += TMath::Sqrt(x*x + y*y);
e341247d 134 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
e43c066c 135 r += TMath::Sqrt(x*x + y*y);
e341247d 136 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
e43c066c 137 r += TMath::Sqrt(x*x + y*y);
138 r*=0.25;
139
140 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
141
142 for (Int_t j=1; j<nlad+1; j++) {
143 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
e341247d 144 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
1f3e997f 145 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
146 m.Multiply(tm);
147 Double_t txyz[3]={0.}, xyz[3]={0.};
148 m.LocalToMaster(txyz,xyz);
149 Double_t r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
150 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
e341247d 151
152 if (phi<0) phi+=TMath::TwoPi();
153 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
154
e43c066c 155 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
156 new(&det) AliITSdetector(r,phi);
157 }
158 }
159
160 }
161
e50912db 162 fI=AliITSgeomTGeo::GetNLayers();
e43c066c 163
164 fPass=0;
165 fConstraint[0]=1; fConstraint[1]=0;
166
afd25725 167 Double_t xyzVtx[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
168 AliITSReconstructor::GetRecoParam()->GetYVdef(),
169 AliITSReconstructor::GetRecoParam()->GetZVdef()};
170 Double_t ersVtx[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
171 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
172 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
173 SetVertex(xyzVtx,ersVtx);
e43c066c 174
e50912db 175 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=AliITSRecoParam::GetLayersNotToSkip(i);
176 fLastLayerToTrackTo=AliITSRecoParam::GetLastLayerToTrackTo();
628e7bb0 177 for (Int_t i=0;i<100000;i++){
178 fBestTrackIndex[i]=0;
179 }
afd25725 180
181 // store positions of centre of SPD modules (in z)
182 Double_t tr[3];
183 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
184 fSPDdetzcentre[0] = tr[2];
185 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
186 fSPDdetzcentre[1] = tr[2];
187 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
188 fSPDdetzcentre[2] = tr[2];
189 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
190 fSPDdetzcentre[3] = tr[2];
191
afd25725 192 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
6518a6c5 193 if(AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance() && fUseTGeo!=1 && fUseTGeo!=3) {
194 AliWarning("fUseTGeo changed to 3 because fExtendedEtaAcceptance is kTRUE");
195 fUseTGeo = 3;
196 }
e50912db 197
198 for(Int_t i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
199 for(Int_t i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
200
81e97e0d 201 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
202
628e7bb0 203}
44347160 204//------------------------------------------------------------------------
8221b41b 205AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
206fI(tracker.fI),
207fBestTrack(tracker.fBestTrack),
208fTrackToFollow(tracker.fTrackToFollow),
209fTrackHypothesys(tracker.fTrackHypothesys),
210fBestHypothesys(tracker.fBestHypothesys),
211fOriginal(tracker.fOriginal),
212fCurrentEsdTrack(tracker.fCurrentEsdTrack),
213fPass(tracker.fPass),
214fAfterV0(tracker.fAfterV0),
215fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
afd25725 216fCoefficients(tracker.fCoefficients),
8221b41b 217fEsd(tracker.fEsd),
e50912db 218fTrackingPhase(tracker.fTrackingPhase),
afd25725 219fUseTGeo(tracker.fUseTGeo),
e50912db 220fNtracks(tracker.fNtracks),
221fxOverX0Pipe(tracker.fxOverX0Pipe),
222fxTimesRhoPipe(tracker.fxTimesRhoPipe),
223fxOverX0PipeTrks(0),
224fxTimesRhoPipeTrks(0),
225fxOverX0ShieldTrks(0),
226fxTimesRhoShieldTrks(0),
227fxOverX0LayerTrks(0),
228fxTimesRhoLayerTrks(0),
4a66240a 229fDebugStreamer(tracker.fDebugStreamer),
230fPlaneEff(tracker.fPlaneEff){
8221b41b 231 //Copy constructor
e50912db 232 Int_t i;
233 for(i=0;i<4;i++) {
234 fSPDdetzcentre[i]=tracker.fSPDdetzcentre[i];
235 }
236 for(i=0;i<6;i++) {
237 fxOverX0Layer[i]=tracker.fxOverX0Layer[i];
238 fxTimesRhoLayer[i]=tracker.fxTimesRhoLayer[i];
239 }
240 for(i=0;i<2;i++) {
241 fxOverX0Shield[i]=tracker.fxOverX0Shield[i];
242 fxTimesRhoShield[i]=tracker.fxTimesRhoShield[i];
243 }
8221b41b 244}
44347160 245//------------------------------------------------------------------------
8221b41b 246AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
247 //Assignment operator
248 this->~AliITStrackerMI();
249 new(this) AliITStrackerMI(tracker);
250 return *this;
251}
44347160 252//------------------------------------------------------------------------
628e7bb0 253AliITStrackerMI::~AliITStrackerMI()
254{
255 //
256 //destructor
257 //
e50912db 258 if (fCoefficients) delete [] fCoefficients;
259 DeleteTrksMaterialLUT();
81e97e0d 260 if (fDebugStreamer) {
261 //fDebugStreamer->Close();
262 delete fDebugStreamer;
263 }
e43c066c 264}
44347160 265//------------------------------------------------------------------------
e43c066c 266void AliITStrackerMI::SetLayersNotToSkip(Int_t *l) {
267 //--------------------------------------------------------------------
268 //This function set masks of the layers which must be not skipped
269 //--------------------------------------------------------------------
e50912db 270 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fLayersNotToSkip[i]=l[i];
e43c066c 271}
44347160 272//------------------------------------------------------------------------
e43c066c 273Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
274 //--------------------------------------------------------------------
275 //This function loads ITS clusters
276 //--------------------------------------------------------------------
00a7cc50 277 TBranch *branch=cTree->GetBranch("ITSRecPoints");
e43c066c 278 if (!branch) {
279 Error("LoadClusters"," can't get the branch !\n");
280 return 1;
281 }
282
00a7cc50 283 TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
e43c066c 284 branch->SetAddress(&clusters);
285
286 Int_t j=0;
287 Int_t detector=0;
e50912db 288 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
e43c066c 289 Int_t ndet=fgLayers[i].GetNdetectors();
290 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
291 for (; j<jmax; j++) {
292 if (!cTree->GetEvent(j)) continue;
293 Int_t ncl=clusters->GetEntriesFast();
294 SignDeltas(clusters,GetZ());
1f3e997f 295
e43c066c 296 while (ncl--) {
00a7cc50 297 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
75fb37cc 298 detector=c->GetDetectorIndex();
a504d56f 299
75fb37cc 300 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
a504d56f 301
00a7cc50 302 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
e43c066c 303 }
304 clusters->Delete();
afd25725 305 // add dead zone "virtual" cluster in SPD, if there is a cluster within
306 // zwindow cm from the dead zone
307 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
e50912db 308 for (Float_t xdead = 0; xdead < AliITSRecoParam::GetSPDdetxlength(); xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
afd25725 309 Int_t lab[4] = {0,0,0,detector};
310 Int_t info[3] = {0,0,i};
6518a6c5 311 Float_t q = 0.; // this identifies virtual clusters
afd25725 312 Float_t hit[5] = {xdead,
313 0.,
314 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
315 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
316 q};
317 Bool_t local = kTRUE;
318 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
e50912db 319 hit[1] = fSPDdetzcentre[0]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 320 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
321 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 322 hit[1] = fSPDdetzcentre[1]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 323 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
324 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 325 hit[1] = fSPDdetzcentre[1]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 326 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
327 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 328 hit[1] = fSPDdetzcentre[2]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 329 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
330 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 331 hit[1] = fSPDdetzcentre[2]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 332 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
333 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 334 hit[1] = fSPDdetzcentre[3]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 335 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
336 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e43c066c 337 }
6518a6c5 338 } // "virtual" clusters in SPD
e43c066c 339
340 }
341 //
342 fgLayers[i].ResetRoad(); //road defined by the cluster density
343 fgLayers[i].SortClusters();
344 }
345
346 return 0;
347}
44347160 348//------------------------------------------------------------------------
e43c066c 349void AliITStrackerMI::UnloadClusters() {
350 //--------------------------------------------------------------------
351 //This function unloads ITS clusters
352 //--------------------------------------------------------------------
e50912db 353 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
e43c066c 354}
44347160 355//------------------------------------------------------------------------
afd25725 356static Int_t CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
e43c066c 357 //--------------------------------------------------------------------
358 // Correction for the material between the TPC and the ITS
e43c066c 359 //--------------------------------------------------------------------
e50912db 360 if (t->GetX() > AliITSRecoParam::Getriw()) { // inward direction
361 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw(),1)) return 0;// TPC inner wall
362 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
363 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
364 } else if (t->GetX() < AliITSRecoParam::Getrs()) { // outward direction
365 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
366 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
367 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw()+0.001,1)) return 0;// TPC inner wall
e43c066c 368 } else {
afd25725 369 Error("CorrectForTPCtoITSDeadZoneMaterial","Track is already in the dead zone !");
e50912db 370 return 0;
e43c066c 371 }
372
e50912db 373 return 1;
e43c066c 374}
44347160 375//------------------------------------------------------------------------
af885e0f 376Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
e43c066c 377 //--------------------------------------------------------------------
378 // This functions reconstructs ITS tracks
379 // The clusters must be already loaded !
380 //--------------------------------------------------------------------
e50912db 381 fTrackingPhase="Clusters2Tracks";
382
e43c066c 383 TObjArray itsTracks(15000);
628e7bb0 384 fOriginal.Clear();
81e97e0d 385 fEsd = event; // store pointer to the esd
afd25725 386
9a5326b1 387 // temporary (for cosmics)
388 if(event->GetVertex()) {
389 TString title = event->GetVertex()->GetTitle();
390 if(title.Contains("cosmics")) {
391 Double_t xyz[3]={GetX(),GetY(),GetZ()};
392 Double_t exyz[3]={0.1,0.1,0.1};
393 SetVertex(xyz,exyz);
394 }
395 }
396 // temporary
afd25725 397
e43c066c 398 {/* Read ESD tracks */
afd25725 399 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
e43c066c 400 Int_t nentr=event->GetNumberOfTracks();
401 Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
402 while (nentr--) {
403 AliESDtrack *esd=event->GetTrack(nentr);
404
405 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
406 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
407 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
51ad6848 408 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
15dd636f 409 AliITStrackMI *t=0;
e43c066c 410 try {
15dd636f 411 t=new AliITStrackMI(*esd);
e43c066c 412 } catch (const Char_t *msg) {
628e7bb0 413 //Warning("Clusters2Tracks",msg);
e43c066c 414 delete t;
415 continue;
416 }
b9671574 417 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
418 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
6518a6c5 419
420
afd25725 421 // look at the ESD mass hypothesys !
422 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
e43c066c 423 // write expected q
b9671574 424 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 425
afd25725 426 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
81e97e0d 427 //track - can be V0 according to TPC
afd25725 428 } else {
429 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
81e97e0d 430 delete t;
431 continue;
e50912db 432 }
afd25725 433 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
81e97e0d 434 delete t;
435 continue;
436 }
6c23ffed 437 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
81e97e0d 438 delete t;
439 continue;
440 }
e50912db 441 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
81e97e0d 442 delete t;
443 continue;
444 }
e43c066c 445 }
b9671574 446 t->SetReconstructed(kFALSE);
e43c066c 447 itsTracks.AddLast(t);
628e7bb0 448 fOriginal.AddLast(t);
e43c066c 449 }
450 } /* End Read ESD tracks */
451
452 itsTracks.Sort();
628e7bb0 453 fOriginal.Sort();
e43c066c 454 Int_t nentr=itsTracks.GetEntriesFast();
455 fTrackHypothesys.Expand(nentr);
81e97e0d 456 fBestHypothesys.Expand(nentr);
afd25725 457 MakeCoefficients(nentr);
e50912db 458 if(fUseTGeo==3 || fUseTGeo==4) MakeTrksMaterialLUT(nentr);
e43c066c 459 Int_t ntrk=0;
afd25725 460 // THE TWO TRACKING PASSES
e43c066c 461 for (fPass=0; fPass<2; fPass++) {
462 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
e50912db 463 for (fCurrentEsdTrack=0; fCurrentEsdTrack<nentr; fCurrentEsdTrack++) {
2755f080 464 //cerr<<fPass<<" "<<fCurrentEsdTrack<<'\n';
e50912db 465 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(fCurrentEsdTrack);
e43c066c 466 if (t==0) continue; //this track has been already tracked
b9671574 467 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
791f9a2a 468 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
afd25725 469 if (fConstraint[fPass]) {
470 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
471 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
472 }
e43c066c 473
474 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
475 fI = 6;
476 ResetTrackToFollow(*t);
477 ResetBestTrack();
6518a6c5 478
e50912db 479 FollowProlongationTree(t,fCurrentEsdTrack,fConstraint[fPass]);
e43c066c 480
481 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
482 //
15dd636f 483 AliITStrackMI * besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
e43c066c 484 if (!besttrack) continue;
485 besttrack->SetLabel(tpcLabel);
486 // besttrack->CookdEdx();
487 CookdEdx(besttrack);
b9671574 488 besttrack->SetFakeRatio(1.);
e43c066c 489 CookLabel(besttrack,0.); //For comparison only
e43c066c 490 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
628e7bb0 491
628e7bb0 492 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
493
b9671574 494 t->SetReconstructed(kTRUE);
e43c066c 495 ntrk++;
496 }
497 GetBestHypothesysMIP(itsTracks);
afd25725 498 } // end loop on the two tracking passes
e43c066c 499
500 //GetBestHypothesysMIP(itsTracks);
afd25725 501 if(event->GetNumberOfV0s()>0) UpdateTPCV0(event);
502 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) FindV02(event);
628e7bb0 503 fAfterV0 = kTRUE;
504 //GetBestHypothesysMIP(itsTracks);
505 //
e43c066c 506 itsTracks.Delete();
507 //
508 Int_t entries = fTrackHypothesys.GetEntriesFast();
e50912db 509 for (Int_t ientry=0; ientry<entries; ientry++) {
e43c066c 510 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
511 if (array) array->Delete();
512 delete fTrackHypothesys.RemoveAt(ientry);
513 }
514
515 fTrackHypothesys.Delete();
81e97e0d 516 fBestHypothesys.Delete();
628e7bb0 517 fOriginal.Clear();
afd25725 518 delete [] fCoefficients;
519 fCoefficients=0;
e50912db 520 DeleteTrksMaterialLUT();
521
e43c066c 522 Info("Clusters2Tracks","Number of prolonged tracks: %d\n",ntrk);
e50912db 523
524 fTrackingPhase="Default";
628e7bb0 525
e43c066c 526 return 0;
527}
44347160 528//------------------------------------------------------------------------
af885e0f 529Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
e43c066c 530 //--------------------------------------------------------------------
531 // This functions propagates reconstructed ITS tracks back
532 // The clusters must be loaded !
533 //--------------------------------------------------------------------
e50912db 534 fTrackingPhase="PropagateBack";
e43c066c 535 Int_t nentr=event->GetNumberOfTracks();
536 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
537
538 Int_t ntrk=0;
539 for (Int_t i=0; i<nentr; i++) {
540 AliESDtrack *esd=event->GetTrack(i);
541
542 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
543 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
544
15dd636f 545 AliITStrackMI *t=0;
e43c066c 546 try {
15dd636f 547 t=new AliITStrackMI(*esd);
e43c066c 548 } catch (const Char_t *msg) {
628e7bb0 549 //Warning("PropagateBack",msg);
e43c066c 550 delete t;
551 continue;
552 }
b9671574 553 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 554
555 ResetTrackToFollow(*t);
556
9a5326b1 557 // propagate to vertex [SR, GSI 17.02.2003]
e43c066c 558 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
e50912db 559 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
560 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
561 fTrackToFollow.StartTimeIntegral();
562 // from vertex to outside pipe
563 CorrectForPipeMaterial(&fTrackToFollow,"outward");
e43c066c 564 }
565
6c94f330 566 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
e50912db 567 if (RefitAt(AliITSRecoParam::GetrInsideITSscreen(),&fTrackToFollow,t)) {
568 if (!CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)) {
e43c066c 569 delete t;
570 continue;
571 }
572 fTrackToFollow.SetLabel(t->GetLabel());
573 //fTrackToFollow.CookdEdx();
574 CookLabel(&fTrackToFollow,0.); //For comparison only
575 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
576 //UseClusters(&fTrackToFollow);
577 ntrk++;
578 }
579 delete t;
580 }
581
582 Info("PropagateBack","Number of back propagated ITS tracks: %d\n",ntrk);
583
e50912db 584 fTrackingPhase="Default";
585
e43c066c 586 return 0;
587}
44347160 588//------------------------------------------------------------------------
af885e0f 589Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
e43c066c 590 //--------------------------------------------------------------------
591 // This functions refits ITS tracks using the
592 // "inward propagated" TPC tracks
593 // The clusters must be loaded !
594 //--------------------------------------------------------------------
e50912db 595 fTrackingPhase="RefitInward";
afd25725 596 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) RefitV02(event);
e43c066c 597 Int_t nentr=event->GetNumberOfTracks();
598 Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
599
600 Int_t ntrk=0;
601 for (Int_t i=0; i<nentr; i++) {
602 AliESDtrack *esd=event->GetTrack(i);
603
604 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
605 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
606 if (esd->GetStatus()&AliESDtrack::kTPCout)
607 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
608
15dd636f 609 AliITStrackMI *t=0;
e43c066c 610 try {
15dd636f 611 t=new AliITStrackMI(*esd);
e43c066c 612 } catch (const Char_t *msg) {
628e7bb0 613 //Warning("RefitInward",msg);
e43c066c 614 delete t;
615 continue;
616 }
b9671574 617 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e50912db 618 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
e43c066c 619 delete t;
620 continue;
621 }
622
623 ResetTrackToFollow(*t);
624 fTrackToFollow.ResetClusters();
625
626 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
6c94f330 627 fTrackToFollow.ResetCovariance(10.);
e43c066c 628
629 //Refitting...
e50912db 630 if (RefitAt(AliITSRecoParam::GetrInsideSPD1(), &fTrackToFollow, t,kTRUE)) {
e43c066c 631 fTrackToFollow.SetLabel(t->GetLabel());
632 // fTrackToFollow.CookdEdx();
633 CookdEdx(&fTrackToFollow);
634
635 CookLabel(&fTrackToFollow,0.0); //For comparison only
636
9a5326b1 637 //The beam pipe
e50912db 638 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
9a5326b1 639 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
640 esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit);
641 Float_t r[3]={0.,0.,0.};
642 Double_t maxD=3.;
643 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
644 ntrk++;
e43c066c 645 }
646 }
647 delete t;
648 }
649
650 Info("RefitInward","Number of refitted tracks: %d\n",ntrk);
651
e50912db 652 fTrackingPhase="Default";
653
e43c066c 654 return 0;
655}
44347160 656//------------------------------------------------------------------------
e43c066c 657AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
658 //--------------------------------------------------------------------
659 // Return pointer to a given cluster
660 //--------------------------------------------------------------------
661 Int_t l=(index & 0xf0000000) >> 28;
662 Int_t c=(index & 0x0fffffff) >> 00;
663 return fgLayers[l].GetCluster(c);
664}
9a5326b1 665//------------------------------------------------------------------------
df29e9a4 666Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
9a5326b1 667 //--------------------------------------------------------------------
df29e9a4 668 // Get track space point with index i
9a5326b1 669 //--------------------------------------------------------------------
60066577 670
78b03929 671 Int_t l=(index & 0xf0000000) >> 28;
672 Int_t c=(index & 0x0fffffff) >> 00;
00a7cc50 673 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
df29e9a4 674 Int_t idet = cl->GetDetectorIndex();
4e65ff9e 675
60066577 676 Float_t xyz[3];
677 Float_t cov[6];
678 cl->GetGlobalXYZ(xyz);
679 cl->GetGlobalCov(cov);
680 p.SetXYZ(xyz, cov);
4e65ff9e 681
ae079791 682 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
df29e9a4 683 switch (l) {
684 case 0:
ae079791 685 iLayer = AliGeomManager::kSPD1;
df29e9a4 686 break;
687 case 1:
ae079791 688 iLayer = AliGeomManager::kSPD2;
df29e9a4 689 break;
690 case 2:
ae079791 691 iLayer = AliGeomManager::kSDD1;
df29e9a4 692 break;
693 case 3:
ae079791 694 iLayer = AliGeomManager::kSDD2;
9a5326b1 695 break;
696 case 4:
697 iLayer = AliGeomManager::kSSD1;
698 break;
699 case 5:
700 iLayer = AliGeomManager::kSSD2;
701 break;
702 default:
703 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
704 break;
705 };
706 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
707 p.SetVolumeID((UShort_t)volid);
708 return kTRUE;
709}
710//------------------------------------------------------------------------
711Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
712 AliTrackPoint& p, const AliESDtrack *t) {
713 //--------------------------------------------------------------------
714 // Get track space point with index i
715 // (assign error estimated during the tracking)
716 //--------------------------------------------------------------------
717
718 Int_t l=(index & 0xf0000000) >> 28;
719 Int_t c=(index & 0x0fffffff) >> 00;
720 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
721 Int_t idet = cl->GetDetectorIndex();
722 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
723
724 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
725 Float_t detxy[2];
726 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
727 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
728 Double_t alpha = t->GetAlpha();
729 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
730 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe,AliTracker::GetBz()));
731 phi += alpha-det.GetPhi();
732 Float_t tgphi = TMath::Tan(phi);
733
734 Float_t tgl = t->GetTgl(); // tgl about const along track
735 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
736
737 Float_t errlocalx,errlocalz;
e50912db 738 AliITSClusterParam::GetError(l,cl,tgl,tgphi,expQ,errlocalx,errlocalz);
9a5326b1 739
740 Float_t xyz[3];
741 Float_t cov[6];
742 cl->GetGlobalXYZ(xyz);
743 // cl->GetGlobalCov(cov);
744 Float_t pos[3] = {0.,0.,0.};
745 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errlocalx*errlocalx,errlocalz*errlocalz,0);
746 tmpcl.GetGlobalCov(cov);
747
748 p.SetXYZ(xyz, cov);
749
750 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
751 switch (l) {
752 case 0:
753 iLayer = AliGeomManager::kSPD1;
754 break;
755 case 1:
756 iLayer = AliGeomManager::kSPD2;
757 break;
758 case 2:
759 iLayer = AliGeomManager::kSDD1;
760 break;
761 case 3:
762 iLayer = AliGeomManager::kSDD2;
df29e9a4 763 break;
764 case 4:
ae079791 765 iLayer = AliGeomManager::kSSD1;
df29e9a4 766 break;
767 case 5:
ae079791 768 iLayer = AliGeomManager::kSSD2;
df29e9a4 769 break;
770 default:
771 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
772 break;
773 };
ae079791 774 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
df29e9a4 775 p.SetVolumeID((UShort_t)volid);
776 return kTRUE;
777}
44347160 778//------------------------------------------------------------------------
81e97e0d 779void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
e43c066c 780{
781 //--------------------------------------------------------------------
782 // Follow prolongation tree
783 //--------------------------------------------------------------------
81e97e0d 784 //
afd25725 785 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
786 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
787
2755f080 788
b9671574 789 AliESDtrack * esd = otrack->GetESDtrack();
afd25725 790 if (esd->GetV0Index(0)>0) {
81e97e0d 791 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
afd25725 792 // mapping of ESD track is different as ITS track in Containers
81e97e0d 793 // Need something more stable
44347160 794 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
81e97e0d 795 for (Int_t i=0;i<3;i++){
796 Int_t index = esd->GetV0Index(i);
797 if (index==0) break;
d6a49f20 798 AliESDv0 * vertex = fEsd->GetV0(index);
81e97e0d 799 if (vertex->GetStatus()<0) continue; // rejected V0
800 //
afd25725 801 if (esd->GetSign()>0) {
802 vertex->SetIndex(0,esdindex);
803 } else {
804 vertex->SetIndex(1,esdindex);
805 }
81e97e0d 806 }
807 }
808 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
809 if (!bestarray){
810 bestarray = new TObjArray(5);
811 fBestHypothesys.AddAt(bestarray,esdindex);
812 }
e43c066c 813
81e97e0d 814 //
e43c066c 815 //setup tree of the prolongations
816 //
15dd636f 817 static AliITStrackMI tracks[7][100];
818 AliITStrackMI *currenttrack;
819 static AliITStrackMI currenttrack1;
820 static AliITStrackMI currenttrack2;
821 static AliITStrackMI backuptrack;
e43c066c 822 Int_t ntracks[7];
823 Int_t nindexes[7][100];
824 Float_t normalizedchi2[100];
825 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
b9671574 826 otrack->SetNSkipped(0);
15dd636f 827 new (&(tracks[6][0])) AliITStrackMI(*otrack);
e43c066c 828 ntracks[6]=1;
81e97e0d 829 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
e43c066c 830 //
831 //
832 // follow prolongations
e50912db 833 for (Int_t ilayer=5; ilayer>=0; ilayer--) {
2755f080 834 fI = ilayer;
e43c066c 835 //
2755f080 836 AliITSlayer &layer=fgLayers[ilayer];
837 Double_t r = layer.GetR();
e43c066c 838 ntracks[ilayer]=0;
839 //
840 //
2755f080 841 Int_t nskipped=0;
e43c066c 842 Float_t nused =0;
e50912db 843 for (Int_t itrack =0; itrack<ntracks[ilayer+1]; itrack++) {
e43c066c 844 //set current track
845 if (ntracks[ilayer]>=100) break;
b9671574 846 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
847 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
e43c066c 848 if (ntracks[ilayer]>15+ilayer){
b9671574 849 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
850 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
e43c066c 851 }
852
15dd636f 853 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
44347160 854
afd25725 855 // material between SSD and SDD, SDD and SPD
e50912db 856 if (ilayer==3)
857 if(!CorrectForShieldMaterial(&currenttrack1,"SDD","inward")) continue;
858 if (ilayer==1)
859 if(!CorrectForShieldMaterial(&currenttrack1,"SPD","inward")) continue;
8602c008 860
2755f080 861 // detector number
8602c008 862 Double_t phi,z;
863 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
e43c066c 864 Int_t idet=layer.FindDetectorIndex(phi,z);
e50912db 865
866 Double_t trackGlobXYZ1[3];
867 currenttrack1.GetXYZ(trackGlobXYZ1);
868
2755f080 869 // Get the budget to the primary vertex for the current track being prolonged
870 Double_t budgetToPrimVertex = GetEffectiveThickness();
871
872 // check if we allow a prolongation without point
6518a6c5 873 Int_t skip = CheckSkipLayer(&currenttrack1,ilayer,idet);
2755f080 874 if (skip) {
875 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
6518a6c5 876 // propagate to the layer radius
877 Double_t xToGo; vtrack->GetLocalXat(r,xToGo);
878 vtrack->AliExternalTrackParam::PropagateTo(xToGo,GetBz());
2755f080 879 // apply correction for material of the current layer
880 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
881 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
882 vtrack->SetClIndex(ilayer,0);
883 if(constrain) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
884 ntracks[ilayer]++;
6518a6c5 885 continue;
2755f080 886 }
887
888 // track outside layer acceptance in z
889 if (idet<0) continue;
890
891 //propagate to the intersection with the detector plane
892 const AliITSdetector &det=layer.GetDetector(idet);
893 new(&currenttrack2) AliITStrackMI(currenttrack1);
44347160 894 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
895 currenttrack2.Propagate(det.GetPhi(),det.GetR());
e43c066c 896 currenttrack1.SetDetectorIndex(idet);
897 currenttrack2.SetDetectorIndex(idet);
6518a6c5 898
afd25725 899 //***************
900 // DEFINITION OF SEARCH ROAD FOR CLUSTERS SELECTION
e43c066c 901 //
44347160 902 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
903 TMath::Sqrt(currenttrack1.GetSigmaZ2() +
904 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
905 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
906 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
907 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
908 TMath::Sqrt(currenttrack1.GetSigmaY2() +
909 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
910 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
911 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
afd25725 912
44347160 913 // track at boundary between detectors, enlarge road
e50912db 914 Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidth();
915 if ( (currenttrack1.GetY()-dy < det.GetYmin()+boundaryWidth) ||
916 (currenttrack1.GetY()+dy > det.GetYmax()-boundaryWidth) ||
917 (currenttrack1.GetZ()-dz < det.GetZmin()+boundaryWidth) ||
918 (currenttrack1.GetZ()+dz > det.GetZmax()-boundaryWidth) ) {
afd25725 919 Float_t tgl = TMath::Abs(currenttrack1.GetTgl());
920 if (tgl > 1.) tgl=1.;
e50912db 921 Double_t deltaXNeighbDets=AliITSRecoParam::GetDeltaXNeighbDets();
922 dz = TMath::Sqrt(dz*dz+deltaXNeighbDets*deltaXNeighbDets*tgl*tgl);
afd25725 923 Float_t snp = TMath::Abs(currenttrack1.GetSnp());
924 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) continue;
e50912db 925 dy = TMath::Sqrt(dy*dy+deltaXNeighbDets*deltaXNeighbDets*snp*snp);
44347160 926 } // boundary
e43c066c 927
2755f080 928 // road in global (rphi,z) [i.e. in tracking ref. system]
44347160 929 Double_t zmin = currenttrack1.GetZ() - dz;
930 Double_t zmax = currenttrack1.GetZ() + dz;
931 Double_t ymin = currenttrack1.GetY() + r*det.GetPhi() - dy;
932 Double_t ymax = currenttrack1.GetY() + r*det.GetPhi() + dy;
2755f080 933
afd25725 934 // select clusters in road
e43c066c 935 layer.SelectClusters(zmin,zmax,ymin,ymax);
afd25725 936 //********************
44347160 937
afd25725 938 // Define criteria for track-cluster association
44347160 939 Double_t msz = currenttrack1.GetSigmaZ2() +
940 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
941 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
942 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
943 Double_t msy = currenttrack1.GetSigmaY2() +
944 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
945 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
946 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
947 if (constrain) {
948 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
949 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
950 } else {
951 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
952 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
953 }
954 msz = 1./msz; // 1/RoadZ^2
955 msy = 1./msy; // 1/RoadY^2
e43c066c 956 //
e43c066c 957 //
afd25725 958 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
e43c066c 959 //
afd25725 960 const AliITSRecPoint *cl=0;
961 Int_t clidx=-1;
962 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
6518a6c5 963 Bool_t deadzoneSPD=kFALSE;
e43c066c 964 currenttrack = &currenttrack1;
6518a6c5 965
966 // check if the road contains a dead zone and create a prolongation
967 Int_t dead = CheckDeadZone(/*currenttrack,*/ilayer,/*idet,*/zmin,zmax/*,ymin,ymax*/);
968 if (dead) {
969 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
970 updatetrack->SetClIndex(ilayer,0);
971 // apply correction for material of the current layer
972 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
973 if (constrain) { // apply vertex constrain
974 updatetrack->SetConstrain(constrain);
975 Bool_t isPrim = kTRUE;
976 if (ilayer<4) { // check that it's close to the vertex
977 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
978 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
979 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
980 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
981 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
982 }
983 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
984 }
985 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
986 if (dead==1) { // dead zone at z=0,+-7cm in SPD
987 updatetrack->SetDeadZoneProbability(GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
988 deadzoneSPD=kTRUE;
989 }
990 ntracks[ilayer]++;
991 }
992
993 // loop over clusters in the road
afd25725 994 while ((cl=layer.GetNextCluster(clidx))!=0) {
e43c066c 995 if (ntracks[ilayer]>95) break; //space for skipped clusters
afd25725 996 Bool_t changedet =kFALSE;
6518a6c5 997 if (cl->GetQ()==0 && deadzoneSPD==kTRUE) continue;
afd25725 998 Int_t idet=cl->GetDetectorIndex();
999
1000 if (currenttrack->GetDetectorIndex()==idet) { // track already on the cluster's detector
1001 // a first cut on track-cluster distance
1002 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
1003 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
1004 continue; // cluster not associated to track
1005 } else { // have to move track to cluster's detector
e43c066c 1006 const AliITSdetector &det=layer.GetDetector(idet);
afd25725 1007 // a first cut on track-cluster distance
e43c066c 1008 Double_t y,z;
1009 if (!currenttrack2.GetProlongationFast(det.GetPhi(),det.GetR(),y,z)) continue;
afd25725 1010 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
1011 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
44347160 1012 continue; // cluster not associated to track
e43c066c 1013 //
15dd636f 1014 new (&backuptrack) AliITStrackMI(currenttrack2);
afd25725 1015 changedet = kTRUE;
e43c066c 1016 currenttrack =&currenttrack2;
1017 if (!currenttrack->Propagate(det.GetPhi(),det.GetR())) {
15dd636f 1018 new (currenttrack) AliITStrackMI(backuptrack);
afd25725 1019 changedet = kFALSE;
e43c066c 1020 continue;
1021 }
1022 currenttrack->SetDetectorIndex(idet);
e50912db 1023 // Get again the budget to the primary vertex
1024 // for the current track being prolonged, if had to change detector
1025 //budgetToPrimVertex = GetEffectiveThickness();// not needed at the moment because anyway we take a mean material for this correction
e43c066c 1026 }
1027
afd25725 1028 // calculate track-clusters chi2
1029 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
1030 // chi2 cut
1031 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
6518a6c5 1032 if (cl->GetQ()==0) deadzoneSPD=kTRUE; // only 1 prolongation with virtual cluster
e43c066c 1033 if (ntracks[ilayer]>=100) continue;
15dd636f 1034 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
b9671574 1035 updatetrack->SetClIndex(ilayer,0);
afd25725 1036 if (changedet) new (&currenttrack2) AliITStrackMI(backuptrack);
1037
6518a6c5 1038 if (cl->GetQ()!=0) { // real cluster
afd25725 1039 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) continue;
1040 updatetrack->SetSampledEdx(cl->GetQ(),updatetrack->GetNumberOfClusters()-1); //b.b.
6518a6c5 1041 } else { // virtual cluster in dead zone
b9671574 1042 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
6518a6c5 1043 updatetrack->SetDeadZoneProbability(GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
e43c066c 1044 }
afd25725 1045 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1046
1047 // apply correction for material of the current layer
e50912db 1048 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1049
afd25725 1050 if (constrain) { // apply vertex constrain
b9671574 1051 updatetrack->SetConstrain(constrain);
e43c066c 1052 Bool_t isPrim = kTRUE;
afd25725 1053 if (ilayer<4) { // check that it's close to the vertex
b9671574 1054 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
afd25725 1055 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1056 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1057 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1058 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
e43c066c 1059 }
afd25725 1060 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
e43c066c 1061 } //apply vertex constrain
1062 ntracks[ilayer]++;
afd25725 1063 } // create new hypothesis
2755f080 1064 } // loop over possible prolongations
1065
1066 // allow one prolongation without clusters
6518a6c5 1067 if (constrain && itrack<=1 && currenttrack1.GetNSkipped()==0 && deadzoneSPD==kFALSE && ntracks[ilayer]<100) {
15dd636f 1068 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
2755f080 1069 // apply correction for material of the current layer
1070 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
b9671574 1071 vtrack->SetClIndex(ilayer,0);
afd25725 1072 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
b9671574 1073 vtrack->IncrementNSkipped();
e43c066c 1074 ntracks[ilayer]++;
1075 }
628e7bb0 1076
2755f080 1077 // allow one prolongation without clusters for tracks with |tgl|>1.1
1078 if (constrain && itrack==0 && TMath::Abs(currenttrack1.GetTgl())>1.1) { //big theta - for low flux
628e7bb0 1079 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
2755f080 1080 // apply correction for material of the current layer
1081 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
b9671574 1082 vtrack->SetClIndex(ilayer,0);
afd25725 1083 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
b9671574 1084 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
628e7bb0 1085 ntracks[ilayer]++;
1086 }
1087
e43c066c 1088
e50912db 1089 } // loop over tracks in layer ilayer+1
afd25725 1090
1091 //loop over track candidates for the current layer
e43c066c 1092 //
1093 //
1094 Int_t accepted=0;
1095
afd25725 1096 Int_t golden=0;
e43c066c 1097 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1098 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
afd25725 1099 if (normalizedchi2[itrack] <
1100 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
44347160 1101 if (ilayer>4) {
1102 accepted++;
1103 } else {
1104 if (constrain) { // constrain
afd25725 1105 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1106 accepted++;
44347160 1107 } else { // !constrain
afd25725 1108 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1109 accepted++;
44347160 1110 }
e43c066c 1111 }
1112 }
afd25725 1113 // sort tracks by increasing normalized chi2
1114 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
e43c066c 1115 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
afd25725 1116 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
e43c066c 1117 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
afd25725 1118 } // end loop over layers
1119
afd25725 1120
1121 //
1122 // Now select tracks to be kept
1123 //
44347160 1124 Int_t max = constrain ? 20 : 5;
e43c066c 1125
afd25725 1126 // tracks that reach layer 0 (SPD inner)
44347160 1127 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
15dd636f 1128 AliITStrackMI & track= tracks[0][nindexes[0][i]];
628e7bb0 1129 if (track.GetNumberOfClusters()<2) continue;
afd25725 1130 if (!constrain && track.GetNormChi2(0) >
6518a6c5 1131 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) {
1132 continue;
1133 }
15dd636f 1134 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1135 }
afd25725 1136
1137 // tracks that reach layer 1 (SPD outer)
628e7bb0 1138 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
15dd636f 1139 AliITStrackMI & track= tracks[1][nindexes[1][i]];
e43c066c 1140 if (track.GetNumberOfClusters()<4) continue;
afd25725 1141 if (!constrain && track.GetNormChi2(1) >
1142 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
b9671574 1143 if (constrain) track.IncrementNSkipped();
81e97e0d 1144 if (!constrain) {
b9671574 1145 track.SetD(0,track.GetD(GetX(),GetY()));
afd25725 1146 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
b9671574 1147 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1148 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 1149 }
1150 }
15dd636f 1151 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1152 }
afd25725 1153
6518a6c5 1154 // tracks that reach layer 2 (SDD inner), only during non-constrained pass
81e97e0d 1155 if (!constrain){
628e7bb0 1156 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
15dd636f 1157 AliITStrackMI & track= tracks[2][nindexes[2][i]];
628e7bb0 1158 if (track.GetNumberOfClusters()<3) continue;
afd25725 1159 if (!constrain && track.GetNormChi2(2) >
1160 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
b9671574 1161 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
81e97e0d 1162 if (!constrain){
b9671574 1163 track.SetD(0,track.GetD(GetX(),GetY()));
afd25725 1164 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
b9671574 1165 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1166 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 1167 }
1168 }
15dd636f 1169 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1170 }
1171 }
81e97e0d 1172
afd25725 1173 if (!constrain) {
81e97e0d 1174 //
afd25725 1175 // register best track of each layer - important for V0 finder
81e97e0d 1176 //
1177 for (Int_t ilayer=0;ilayer<5;ilayer++){
1178 if (ntracks[ilayer]==0) continue;
1179 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1180 if (track.GetNumberOfClusters()<1) continue;
1181 CookLabel(&track,0);
1182 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1183 }
1184 }
1185 //
1186 // update TPC V0 information
1187 //
b9671574 1188 if (otrack->GetESDtrack()->GetV0Index(0)>0){
81e97e0d 1189 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1190 for (Int_t i=0;i<3;i++){
b9671574 1191 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
81e97e0d 1192 if (index==0) break;
44347160 1193 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
81e97e0d 1194 if (vertex->GetStatus()<0) continue; // rejected V0
1195 //
6c94f330 1196 if (otrack->GetSign()>0) {
81e97e0d 1197 vertex->SetIndex(0,esdindex);
1198 }
1199 else{
1200 vertex->SetIndex(1,esdindex);
1201 }
1202 //find nearest layer with track info
b75d63a7 1203 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1204 Int_t nearestold = GetNearestLayer(xrp); //I.B.
81e97e0d 1205 Int_t nearest = nearestold;
1206 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1207 if (ntracks[nearest]==0){
1208 nearest = ilayer;
1209 }
1210 }
1211 //
1212 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1213 if (nearestold<5&&nearest<5){
b9671574 1214 Bool_t accept = track.GetNormChi2(nearest)<10;
81e97e0d 1215 if (accept){
6c94f330 1216 if (track.GetSign()>0) {
b75d63a7 1217 vertex->SetParamP(track);
81e97e0d 1218 vertex->Update(fprimvertex);
44347160 1219 //vertex->SetIndex(0,track.fESDtrack->GetID());
81e97e0d 1220 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1221 }else{
b75d63a7 1222 vertex->SetParamN(track);
81e97e0d 1223 vertex->Update(fprimvertex);
1224 //vertex->SetIndex(1,track.fESDtrack->GetID());
1225 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1226 }
1227 vertex->SetStatus(vertex->GetStatus()+1);
1228 }else{
44347160 1229 //vertex->SetStatus(-2); // reject V0 - not enough clusters
81e97e0d 1230 }
1231 }
81e97e0d 1232 }
afd25725 1233 }
1234
e43c066c 1235}
44347160 1236//------------------------------------------------------------------------
e43c066c 1237AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1238{
1239 //--------------------------------------------------------------------
1240 //
1241 //
1242 return fgLayers[layer];
1243}
44347160 1244//------------------------------------------------------------------------
8221b41b 1245AliITStrackerMI::AliITSlayer::AliITSlayer():
1246fR(0),
1247fPhiOffset(0),
1248fNladders(0),
1249fZOffset(0),
1250fNdetectors(0),
1251fDetectors(0),
1252fN(0),
1253fDy5(0),
1254fDy10(0),
1255fDy20(0),
1256fClustersCs(0),
1257fClusterIndexCs(0),
1258fYcs(0),
1259fZcs(0),
1260fNcs(0),
1261fCurrentSlice(-1),
1262fZmax(0),
1263fYmin(0),
1264fYmax(0),
1265fI(0),
1266fImax(0),
1267fSkip(0),
1268fAccepted(0),
1269fRoad(0){
e43c066c 1270 //--------------------------------------------------------------------
1271 //default AliITSlayer constructor
1272 //--------------------------------------------------------------------
e50912db 1273 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1274 fClusterWeight[i]=0;
1275 fClusterTracks[0][i]=-1;
1276 fClusterTracks[1][i]=-1;
1277 fClusterTracks[2][i]=-1;
1278 fClusterTracks[3][i]=-1;
1279 }
1280}
44347160 1281//------------------------------------------------------------------------
e43c066c 1282AliITStrackerMI::AliITSlayer::
8221b41b 1283AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1284fR(r),
1285fPhiOffset(p),
1286fNladders(nl),
1287fZOffset(z),
1288fNdetectors(nd),
1289fDetectors(0),
1290fN(0),
1291fDy5(0),
1292fDy10(0),
1293fDy20(0),
1294fClustersCs(0),
1295fClusterIndexCs(0),
1296fYcs(0),
1297fZcs(0),
1298fNcs(0),
1299fCurrentSlice(-1),
1300fZmax(0),
1301fYmin(0),
1302fYmax(0),
1303fI(0),
1304fImax(0),
1305fSkip(0),
1306fAccepted(0),
1307fRoad(0) {
e43c066c 1308 //--------------------------------------------------------------------
1309 //main AliITSlayer constructor
1310 //--------------------------------------------------------------------
e43c066c 1311 fDetectors=new AliITSdetector[fNladders*fNdetectors];
afd25725 1312 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
e43c066c 1313}
44347160 1314//------------------------------------------------------------------------
8221b41b 1315AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1316fR(layer.fR),
1317fPhiOffset(layer.fPhiOffset),
1318fNladders(layer.fNladders),
1319fZOffset(layer.fZOffset),
1320fNdetectors(layer.fNdetectors),
1321fDetectors(layer.fDetectors),
1322fN(layer.fN),
1323fDy5(layer.fDy5),
1324fDy10(layer.fDy10),
1325fDy20(layer.fDy20),
1326fClustersCs(layer.fClustersCs),
1327fClusterIndexCs(layer.fClusterIndexCs),
1328fYcs(layer.fYcs),
1329fZcs(layer.fZcs),
1330fNcs(layer.fNcs),
1331fCurrentSlice(layer.fCurrentSlice),
1332fZmax(layer.fZmax),
1333fYmin(layer.fYmin),
1334fYmax(layer.fYmax),
1335fI(layer.fI),
1336fImax(layer.fImax),
1337fSkip(layer.fSkip),
1338fAccepted(layer.fAccepted),
1339fRoad(layer.fRoad){
1340 //Copy constructor
1341}
44347160 1342//------------------------------------------------------------------------
e43c066c 1343AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1344 //--------------------------------------------------------------------
1345 // AliITSlayer destructor
1346 //--------------------------------------------------------------------
1347 delete[] fDetectors;
1348 for (Int_t i=0; i<fN; i++) delete fClusters[i];
e50912db 1349 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1350 fClusterWeight[i]=0;
1351 fClusterTracks[0][i]=-1;
1352 fClusterTracks[1][i]=-1;
1353 fClusterTracks[2][i]=-1;
1354 fClusterTracks[3][i]=-1;
1355 }
1356}
44347160 1357//------------------------------------------------------------------------
e43c066c 1358void AliITStrackerMI::AliITSlayer::ResetClusters() {
1359 //--------------------------------------------------------------------
1360 // This function removes loaded clusters
1361 //--------------------------------------------------------------------
1362 for (Int_t i=0; i<fN; i++) delete fClusters[i];
e50912db 1363 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++){
e43c066c 1364 fClusterWeight[i]=0;
1365 fClusterTracks[0][i]=-1;
1366 fClusterTracks[1][i]=-1;
1367 fClusterTracks[2][i]=-1;
1368 fClusterTracks[3][i]=-1;
1369 }
1370
1371 fN=0;
1372 fI=0;
1373}
44347160 1374//------------------------------------------------------------------------
e43c066c 1375void AliITStrackerMI::AliITSlayer::ResetWeights() {
1376 //--------------------------------------------------------------------
1377 // This function reset weights of the clusters
1378 //--------------------------------------------------------------------
e50912db 1379 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1380 fClusterWeight[i]=0;
1381 fClusterTracks[0][i]=-1;
1382 fClusterTracks[1][i]=-1;
1383 fClusterTracks[2][i]=-1;
1384 fClusterTracks[3][i]=-1;
1385 }
1386 for (Int_t i=0; i<fN;i++) {
00a7cc50 1387 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
e43c066c 1388 if (cl&&cl->IsUsed()) cl->Use();
1389 }
1390
1391}
44347160 1392//------------------------------------------------------------------------
e43c066c 1393void AliITStrackerMI::AliITSlayer::ResetRoad() {
1394 //--------------------------------------------------------------------
1395 // This function calculates the road defined by the cluster density
1396 //--------------------------------------------------------------------
1397 Int_t n=0;
1398 for (Int_t i=0; i<fN; i++) {
1399 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1400 }
afd25725 1401 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
e43c066c 1402}
44347160 1403//------------------------------------------------------------------------
afd25725 1404Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
e43c066c 1405 //--------------------------------------------------------------------
1406 //This function adds a cluster to this layer
1407 //--------------------------------------------------------------------
e50912db 1408 if (fN==AliITSRecoParam::GetMaxClusterPerLayer()) {
e43c066c 1409 ::Error("InsertCluster","Too many clusters !\n");
1410 return 1;
1411 }
1412 fCurrentSlice=-1;
afd25725 1413 fClusters[fN]=cl;
1d4090b7 1414 fN++;
afd25725 1415 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
1416 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1417 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1418 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1419 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
e43c066c 1420
1421 return 0;
1422}
44347160 1423//------------------------------------------------------------------------
e43c066c 1424void AliITStrackerMI::AliITSlayer::SortClusters()
1425{
1426 //
1427 //sort clusters
1428 //
00a7cc50 1429 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1d4090b7 1430 Float_t *z = new Float_t[fN];
1431 Int_t * index = new Int_t[fN];
1432 //
1433 for (Int_t i=0;i<fN;i++){
1434 z[i] = fClusters[i]->GetZ();
1435 }
1436 TMath::Sort(fN,z,index,kFALSE);
1437 for (Int_t i=0;i<fN;i++){
1438 clusters[i] = fClusters[index[i]];
1439 }
1440 //
1441 for (Int_t i=0;i<fN;i++){
1442 fClusters[i] = clusters[i];
1443 fZ[i] = fClusters[i]->GetZ();
1444 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1445 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1446 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1447 fY[i] = y;
1448 }
1449 delete[] index;
1450 delete[] z;
1451 delete[] clusters;
1452 //
1453
e43c066c 1454 fYB[0]=10000000;
1455 fYB[1]=-10000000;
1456 for (Int_t i=0;i<fN;i++){
1457 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1458 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1459 fClusterIndex[i] = i;
1460 }
1461 //
1462 // fill slices
1463 fDy5 = (fYB[1]-fYB[0])/5.;
1464 fDy10 = (fYB[1]-fYB[0])/10.;
1465 fDy20 = (fYB[1]-fYB[0])/20.;
1466 for (Int_t i=0;i<6;i++) fN5[i] =0;
1467 for (Int_t i=0;i<11;i++) fN10[i]=0;
1468 for (Int_t i=0;i<21;i++) fN20[i]=0;
1469 //
1470 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;}
1471 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;}
1472 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;}
1473 //
1474 //
1d4090b7 1475 for (Int_t i=0;i<fN;i++)
1476 for (Int_t irot=-1;irot<=1;irot++){
1477 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1478 // slice 5
1479 for (Int_t slice=0; slice<6;slice++){
e50912db 1480 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<AliITSRecoParam::GetMaxClusterPerLayer5()){
1d4090b7 1481 fClusters5[slice][fN5[slice]] = fClusters[i];
1482 fY5[slice][fN5[slice]] = curY;
1483 fZ5[slice][fN5[slice]] = fZ[i];
1484 fClusterIndex5[slice][fN5[slice]]=i;
1485 fN5[slice]++;
1486 }
e43c066c 1487 }
1d4090b7 1488 // slice 10
1489 for (Int_t slice=0; slice<11;slice++){
e50912db 1490 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<AliITSRecoParam::GetMaxClusterPerLayer10()){
1d4090b7 1491 fClusters10[slice][fN10[slice]] = fClusters[i];
1492 fY10[slice][fN10[slice]] = curY;
1493 fZ10[slice][fN10[slice]] = fZ[i];
1494 fClusterIndex10[slice][fN10[slice]]=i;
1495 fN10[slice]++;
1496 }
e43c066c 1497 }
1d4090b7 1498 // slice 20
1499 for (Int_t slice=0; slice<21;slice++){
e50912db 1500 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<AliITSRecoParam::GetMaxClusterPerLayer20()){
1d4090b7 1501 fClusters20[slice][fN20[slice]] = fClusters[i];
1502 fY20[slice][fN20[slice]] = curY;
1503 fZ20[slice][fN20[slice]] = fZ[i];
1504 fClusterIndex20[slice][fN20[slice]]=i;
1505 fN20[slice]++;
1506 }
1507 }
e43c066c 1508 }
1d4090b7 1509
1510 //
1511 // consistency check
1512 //
1513 for (Int_t i=0;i<fN-1;i++){
1514 if (fZ[i]>fZ[i+1]){
1515 printf("Bugg\n");
e43c066c 1516 }
1517 }
1d4090b7 1518 //
1519 for (Int_t slice=0;slice<21;slice++)
1520 for (Int_t i=0;i<fN20[slice]-1;i++){
1521 if (fZ20[slice][i]>fZ20[slice][i+1]){
1522 printf("Bugg\n");
1523 }
1524 }
1525
1526
e43c066c 1527}
44347160 1528//------------------------------------------------------------------------
e43c066c 1529Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1530 //--------------------------------------------------------------------
1531 // This function returns the index of the nearest cluster
1532 //--------------------------------------------------------------------
1533 Int_t ncl=0;
1534 const Float_t *zcl;
1535 if (fCurrentSlice<0) {
1536 ncl = fN;
1537 zcl = fZ;
1538 }
1539 else{
1540 ncl = fNcs;
1541 zcl = fZcs;;
1542 }
1543
1544 if (ncl==0) return 0;
1545 Int_t b=0, e=ncl-1, m=(b+e)/2;
1546 for (; b<e; m=(b+e)/2) {
1547 // if (z > fClusters[m]->GetZ()) b=m+1;
1548 if (z > zcl[m]) b=m+1;
1549 else e=m;
1550 }
1551 return m;
1552}
44347160 1553//------------------------------------------------------------------------
e43c066c 1554void AliITStrackerMI::AliITSlayer::
1555SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1556 //--------------------------------------------------------------------
1557 // This function sets the "window"
1558 //--------------------------------------------------------------------
1559
628e7bb0 1560 Double_t circle=2*TMath::Pi()*fR;
e43c066c 1561 fYmin = ymin; fYmax =ymax;
1562 Float_t ymiddle = (fYmin+fYmax)*0.5;
1563 if (ymiddle<fYB[0]) {fYmin+=circle; fYmax+=circle;ymiddle+=circle;}
1564 else{
1565 if (ymiddle>fYB[1]) {fYmin-=circle; fYmax-=circle;ymiddle-=circle;}
1566 }
1567 //
1568 fCurrentSlice =-1;
1569 // defualt take all
1570 fClustersCs = fClusters;
1571 fClusterIndexCs = fClusterIndex;
1572 fYcs = fY;
1573 fZcs = fZ;
1574 fNcs = fN;
628e7bb0 1575 //
e43c066c 1576 //is in 20 slice?
1577 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1578 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1579 if (slice<0) slice=0;
1580 if (slice>20) slice=20;
1581 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1582 if (isOK) {
1583 fCurrentSlice=slice;
1584 fClustersCs = fClusters20[fCurrentSlice];
1585 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1586 fYcs = fY20[fCurrentSlice];
1587 fZcs = fZ20[fCurrentSlice];
1588 fNcs = fN20[fCurrentSlice];
1589 }
1590 }
1591 //
1592 //is in 10 slice?
1593 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1594 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1595 if (slice<0) slice=0;
1596 if (slice>10) slice=10;
1597 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1598 if (isOK) {
1599 fCurrentSlice=slice;
1600 fClustersCs = fClusters10[fCurrentSlice];
1601 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1602 fYcs = fY10[fCurrentSlice];
1603 fZcs = fZ10[fCurrentSlice];
1604 fNcs = fN10[fCurrentSlice];
1605 }
1606 }
1607 //
1608 //is in 5 slice?
1609 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1610 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1611 if (slice<0) slice=0;
1612 if (slice>5) slice=5;
1613 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
1614 if ( isOK){
1615 fCurrentSlice=slice;
1616 fClustersCs = fClusters5[fCurrentSlice];
1617 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1618 fYcs = fY5[fCurrentSlice];
1619 fZcs = fZ5[fCurrentSlice];
1620 fNcs = fN5[fCurrentSlice];
1621 }
1622 }
628e7bb0 1623 //
e43c066c 1624 fI=FindClusterIndex(zmin); fZmax=zmax;
1625 fImax = TMath::Min(FindClusterIndex(zmax)+1,fNcs);
1626 fSkip = 0;
1627 fAccepted =0;
6518a6c5 1628
1629 return;
e43c066c 1630}
44347160 1631//------------------------------------------------------------------------
628e7bb0 1632Int_t AliITStrackerMI::AliITSlayer::
1633FindDetectorIndex(Double_t phi, Double_t z) const {
1634 //--------------------------------------------------------------------
1635 //This function finds the detector crossed by the track
1636 //--------------------------------------------------------------------
31fb8575 1637 Double_t dphi;
1638 if (fZOffset<0) // old geometry
1639 dphi = -(phi-fPhiOffset);
1640 else // new geometry
1641 dphi = phi-fPhiOffset;
1642
6518a6c5 1643
628e7bb0 1644 if (dphi < 0) dphi += 2*TMath::Pi();
1645 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1646 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1647 if (np>=fNladders) np-=fNladders;
1648 if (np<0) np+=fNladders;
1649
6518a6c5 1650
628e7bb0 1651 Double_t dz=fZOffset-z;
6518a6c5 1652 Double_t nnz = dz*(fNdetectors-1)*0.5/fZOffset+0.5;
1653 Int_t nz = (nnz<0 ? -1 : (Int_t)nnz);
628e7bb0 1654 if (nz>=fNdetectors) return -1;
1655 if (nz<0) return -1;
1656
1657 return np*fNdetectors + nz;
1658}
44347160 1659//------------------------------------------------------------------------
00a7cc50 1660const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci){
e43c066c 1661 //--------------------------------------------------------------------
1662 // This function returns clusters within the "window"
1663 //--------------------------------------------------------------------
1664
1665 if (fCurrentSlice<0){
1666 Double_t rpi2 = 2.*fR*TMath::Pi();
1667 for (Int_t i=fI; i<fImax; i++) {
1668 Double_t y = fY[i];
1669 if (fYmax<y) y -= rpi2;
1d4090b7 1670 if (fYmin>y) y += rpi2;
e43c066c 1671 if (y<fYmin) continue;
1672 if (y>fYmax) continue;
1673 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1674 ci=i;
1675 fI=i+1;
1676 return fClusters[i];
1677 }
1678 }
1679 else{
1680 for (Int_t i=fI; i<fImax; i++) {
1681 if (fYcs[i]<fYmin) continue;
1682 if (fYcs[i]>fYmax) continue;
1683 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1684 ci=fClusterIndexCs[i];
1685 fI=i+1;
1686 return fClustersCs[i];
1687 }
1688 }
1689 return 0;
1690}
44347160 1691//------------------------------------------------------------------------
e43c066c 1692Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1693const {
1694 //--------------------------------------------------------------------
afd25725 1695 // This function returns the layer thickness at this point (units X0)
e43c066c 1696 //--------------------------------------------------------------------
1697 Double_t d=0.0085;
e50912db 1698 x0=AliITSRecoParam::GetX0Air();
e43c066c 1699 if (43<fR&&fR<45) { //SSD2
1700 Double_t dd=0.0034;
1701 d=dd;
1702 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1703 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1704 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1705 for (Int_t i=0; i<12; i++) {
1706 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1707 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1708 d+=0.0034;
1709 break;
1710 }
1711 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1712 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1713 d+=0.0034;
1714 break;
1715 }
1716 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1717 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1718 }
1719 } else
1720 if (37<fR&&fR<41) { //SSD1
1721 Double_t dd=0.0034;
1722 d=dd;
1723 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1724 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1725 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1726 for (Int_t i=0; i<11; i++) {
1727 if (TMath::Abs(z-3.9*i)<0.15) {
1728 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1729 d+=dd;
1730 break;
1731 }
1732 if (TMath::Abs(z+3.9*i)<0.15) {
1733 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1734 d+=dd;
1735 break;
1736 }
1737 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1738 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1739 }
1740 } else
1741 if (13<fR&&fR<26) { //SDD
1742 Double_t dd=0.0033;
1743 d=dd;
1744 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1745
1746 if (TMath::Abs(y-1.80)<0.55) {
1747 d+=0.016;
1748 for (Int_t j=0; j<20; j++) {
1749 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1750 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1751 }
1752 }
1753 if (TMath::Abs(y+1.80)<0.55) {
1754 d+=0.016;
1755 for (Int_t j=0; j<20; j++) {
1756 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1757 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
1758 }
1759 }
1760
1761 for (Int_t i=0; i<4; i++) {
1762 if (TMath::Abs(z-7.3*i)<0.60) {
1763 d+=dd;
1764 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1765 break;
1766 }
1767 if (TMath::Abs(z+7.3*i)<0.60) {
1768 d+=dd;
1769 if (TMath::Abs(y-0.00)>3.30) d+=dd;
1770 break;
1771 }
1772 }
1773 } else
1774 if (6<fR&&fR<8) { //SPD2
1775 Double_t dd=0.0063; x0=21.5;
1776 d=dd;
1777 if (TMath::Abs(y-3.08)>0.5) d+=dd;
afd25725 1778 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
e43c066c 1779 } else
1780 if (3<fR&&fR<5) { //SPD1
1781 Double_t dd=0.0063; x0=21.5;
1782 d=dd;
1783 if (TMath::Abs(y+0.21)>0.6) d+=dd;
afd25725 1784 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
e43c066c 1785 }
1786
1787 return d;
1788}
44347160 1789//------------------------------------------------------------------------
e50912db 1790Double_t AliITStrackerMI::GetEffectiveThickness()
e43c066c 1791{
1792 //--------------------------------------------------------------------
afd25725 1793 // Returns the thickness between the current layer and the vertex (units X0)
e43c066c 1794 //--------------------------------------------------------------------
e43c066c 1795
e50912db 1796 if(fUseTGeo!=0) {
1797 if(fxOverX0Layer[0]<0) BuildMaterialLUT("Layers");
1798 if(fxOverX0Shield[0]<0) BuildMaterialLUT("Shields");
1799 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
1800 }
1801
afd25725 1802 // beam pipe
e50912db 1803 Double_t dPipe = (fUseTGeo==0 ? AliITSRecoParam::GetdPipe() : fxOverX0Pipe);
1804 Double_t d=dPipe*AliITSRecoParam::GetrPipe()*AliITSRecoParam::GetrPipe();
afd25725 1805
1806 // layers
1807 Double_t x0=0;
e43c066c 1808 Double_t xn=fgLayers[fI].GetR();
1809 for (Int_t i=0; i<fI; i++) {
1810 Double_t xi=fgLayers[i].GetR();
e50912db 1811 Double_t dLayer = (fUseTGeo==0 ? fgLayers[i].GetThickness(0,0,x0) : fxOverX0Layer[i]);
1812 d+=dLayer*xi*xi;
e43c066c 1813 }
1814
afd25725 1815 // shields
e43c066c 1816 if (fI>1) {
e50912db 1817 Double_t dshieldSPD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(0) : fxOverX0Shield[0]);
1818 d+=dshieldSPD*AliITSRecoParam::GetrInsideShield(0)*AliITSRecoParam::GetrInsideShield(0);
e43c066c 1819 }
e43c066c 1820 if (fI>3) {
e50912db 1821 Double_t dshieldSDD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(1) : fxOverX0Shield[1]);
1822 d+=dshieldSDD*AliITSRecoParam::GetrInsideShield(1)*AliITSRecoParam::GetrInsideShield(1);
e43c066c 1823 }
e43c066c 1824 return d/(xn*xn);
1825}
44347160 1826//------------------------------------------------------------------------
e43c066c 1827Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
1828 //--------------------------------------------------------------------
1829 // This function returns number of clusters within the "window"
1830 //--------------------------------------------------------------------
1831 Int_t ncl=0;
1832 for (Int_t i=fI; i<fN; i++) {
00a7cc50 1833 const AliITSRecPoint *c=fClusters[i];
e43c066c 1834 if (c->GetZ() > fZmax) break;
1835 if (c->IsUsed()) continue;
1836 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
1837 Double_t y=fR*det.GetPhi() + c->GetY();
1838
1839 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
1840 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
1841
1842 if (y<fYmin) continue;
1843 if (y>fYmax) continue;
1844 ncl++;
1845 }
1846 return ncl;
1847}
44347160 1848//------------------------------------------------------------------------
ef7253ac 1849Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,
1850 const AliITStrackMI *c, Bool_t extra) {
e43c066c 1851 //--------------------------------------------------------------------
1852 // This function refits the track "t" at the position "x" using
1853 // the clusters from "c"
ef7253ac 1854 // If "extra"==kTRUE,
1855 // the clusters from overlapped modules get attached to "t"
e43c066c 1856 //--------------------------------------------------------------------
6518a6c5 1857
e50912db 1858 Int_t index[AliITSgeomTGeo::kNLayers];
e43c066c 1859 Int_t k;
e50912db 1860 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
e43c066c 1861 Int_t nc=c->GetNumberOfClusters();
1862 for (k=0; k<nc; k++) {
1863 Int_t idx=c->GetClusterIndex(k),nl=(idx&0xf0000000)>>28;
1864 index[nl]=idx;
1865 }
1866
6518a6c5 1867 // special for cosmics: check which is the innermost layer crossed
afd25725 1868 // by the track
1869 Int_t innermostlayer=5;
1870 Double_t d = TMath::Abs(t->GetD(0.,0.));
e50912db 1871 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++)
afd25725 1872 if(d<fgLayers[innermostlayer].GetR()) break;
1873 //printf(" d %f innermost %d\n",d,innermostlayer);
1874
e43c066c 1875 Int_t from, to, step;
1876 if (xx > t->GetX()) {
e50912db 1877 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
e43c066c 1878 step=+1;
1879 } else {
e50912db 1880 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
e43c066c 1881 step=-1;
1882 }
e50912db 1883 TString dir=(step>0 ? "outward" : "inward");
e43c066c 1884
afd25725 1885 // loop on the layers
6518a6c5 1886 for (Int_t ilayer=from; ilayer != to; ilayer += step) {
1887 AliITSlayer &layer=fgLayers[ilayer];
e43c066c 1888 Double_t r=layer.GetR();
1889
afd25725 1890 // material between SSD and SDD, SDD and SPD
6518a6c5 1891 Double_t hI=ilayer-0.5*step;
e50912db 1892 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
1893 if(!CorrectForShieldMaterial(t,"SDD",dir)) return kFALSE;
1894 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
1895 if(!CorrectForShieldMaterial(t,"SPD",dir)) return kFALSE;
afd25725 1896
e43c066c 1897 // remember old position [SR, GSI 18.02.2003]
1898 Double_t oldX=0., oldY=0., oldZ=0.;
1899 if (t->IsStartedTimeIntegral() && step==1) {
1900 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
1901 }
1902 //
1903
afd25725 1904 Double_t oldGlobXYZ[3];
1905 t->GetXYZ(oldGlobXYZ);
1906
8602c008 1907 Double_t phi,z;
1908 if (!t->GetPhiZat(r,phi,z)) return kFALSE;
1909
e43c066c 1910 Int_t idet=layer.FindDetectorIndex(phi,z);
6518a6c5 1911
1912 // check if we allow a prolongation without point for large-eta tracks
1913 Int_t skip = CheckSkipLayer(t,ilayer,idet);
1914 if (skip==2) {
1915 // propagate to the layer radius
1916 Double_t xToGo; t->GetLocalXat(r,xToGo);
1917 t->AliExternalTrackParam::PropagateTo(xToGo,GetBz());
1918 // apply correction for material of the current layer
1919 CorrectForLayerMaterial(t,ilayer,oldGlobXYZ,dir);
1920 // track time update [SR, GSI 17.02.2003]
1921 if (t->IsStartedTimeIntegral() && step==1) {
1922 Double_t newX, newY, newZ;
1923 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
1924 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
1925 (oldZ-newZ)*(oldZ-newZ);
1926 t->AddTimeStep(TMath::Sqrt(dL2));
1927 }
1928 continue;
1929 }
1930
e50912db 1931 if (idet<0) return kFALSE;
8602c008 1932
e43c066c 1933 const AliITSdetector &det=layer.GetDetector(idet);
1934 phi=det.GetPhi();
e50912db 1935 if (!t->Propagate(phi,det.GetR())) return kFALSE;
e43c066c 1936 t->SetDetectorIndex(idet);
1937
00a7cc50 1938 const AliITSRecPoint *cl=0;
44347160 1939 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
e43c066c 1940
6518a6c5 1941 Int_t idx=index[ilayer];
0653282c 1942 if (idx>=0) {
00a7cc50 1943 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
6518a6c5 1944 if (c) {
67c1e979 1945 if (idet != c->GetDetectorIndex()) {
1946 idet=c->GetDetectorIndex();
1947 const AliITSdetector &det=layer.GetDetector(idet);
1948 if (!t->Propagate(det.GetPhi(),det.GetR())) {
1949 return kFALSE;
1950 }
1951 t->SetDetectorIndex(idet);
1952 }
1953 //Double_t chi2=t->GetPredictedChi2(c);
1954 Int_t layer = (idx & 0xf0000000) >> 28;;
1955 Double_t chi2=GetPredictedChi2MI(t,c,layer);
1956 if (chi2<maxchi2) {
1957 cl=c;
1958 maxchi2=chi2;
1959 } else {
1960 return kFALSE;
1961 }
1962 }
1963 }
67c1e979 1964
67c1e979 1965 if (cl) {
afd25725 1966 if (!UpdateMI(t,cl,maxchi2,idx)) return kFALSE;
67c1e979 1967 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
1968 }
1969
ef7253ac 1970 if (extra) { //search for extra clusters
1971 AliITStrackV2 tmp(*t);
6518a6c5 1972 Double_t dz=4*TMath::Sqrt(tmp.GetSigmaZ2()+AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
ef7253ac 1973 if (dz < 0.5*TMath::Abs(tmp.GetTgl())) dz=0.5*TMath::Abs(tmp.GetTgl());
6518a6c5 1974 Double_t dy=4*TMath::Sqrt(t->GetSigmaY2()+AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
ef7253ac 1975 if (dy < 0.5*TMath::Abs(tmp.GetSnp())) dy=0.5*TMath::Abs(tmp.GetSnp());
1976 Double_t zmin=t->GetZ() - dz;
1977 Double_t zmax=t->GetZ() + dz;
1978 Double_t ymin=t->GetY() + phi*r - dy;
1979 Double_t ymax=t->GetY() + phi*r + dy;
1980 layer.SelectClusters(zmin,zmax,ymin,ymax);
1981
1982 const AliITSRecPoint *c=0; Int_t ci=-1,cci=-1;
44347160 1983 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2(), tolerance=0.1;
ef7253ac 1984 while ((c=layer.GetNextCluster(ci))!=0) {
1985 if (idet == c->GetDetectorIndex()) continue;
1986
1987 const AliITSdetector &det=layer.GetDetector(c->GetDetectorIndex());
1988
1989 if (!tmp.Propagate(det.GetPhi(),det.GetR())) continue;
1990
1991 if (TMath::Abs(tmp.GetZ() - c->GetZ()) > tolerance) continue;
1992 if (TMath::Abs(tmp.GetY() - c->GetY()) > tolerance) continue;
1993
1994 Double_t chi2=tmp.GetPredictedChi2(c);
1995 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
1996 }
6518a6c5 1997 if (cci>=0) t->SetExtraCluster(ilayer,(ilayer<<28)+cci);
ef7253ac 1998 }
1999
67c1e979 2000 // track time update [SR, GSI 17.02.2003]
2001 if (t->IsStartedTimeIntegral() && step==1) {
2002 Double_t newX, newY, newZ;
2003 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
2004 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
2005 (oldZ-newZ)*(oldZ-newZ);
2006 t->AddTimeStep(TMath::Sqrt(dL2));
2007 }
2008 //
2009
e50912db 2010 // Correct for material of the current layer
6518a6c5 2011 if(!CorrectForLayerMaterial(t,ilayer,oldGlobXYZ,dir)) return kFALSE;
e50912db 2012
afd25725 2013 } // end loop on the layers
67c1e979 2014
2015 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
2016 return kTRUE;
2017}
44347160 2018//------------------------------------------------------------------------
67c1e979 2019Bool_t
2020AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *t,const Int_t *clindex) {
2021 //--------------------------------------------------------------------
2022 // This function refits the track "t" at the position "x" using
2023 // the clusters from array
2024 //--------------------------------------------------------------------
e50912db 2025 Int_t index[AliITSgeomTGeo::kNLayers];
67c1e979 2026 Int_t k;
e50912db 2027 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
67c1e979 2028 //
e50912db 2029 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
67c1e979 2030 index[k]=clindex[k];
2031 }
2032
afd25725 2033 // special for cosmics: check which the innermost layer crossed
2034 // by the track
2035 Int_t innermostlayer=5;
2036 Double_t d = TMath::Abs(t->GetD(0.,0.));
e50912db 2037 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++)
afd25725 2038 if(d<fgLayers[innermostlayer].GetR()) break;
2039 //printf(" d %f innermost %d\n",d,innermostlayer);
2040
67c1e979 2041 Int_t from, to, step;
2042 if (xx > t->GetX()) {
e50912db 2043 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
67c1e979 2044 step=+1;
2045 } else {
e50912db 2046 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
67c1e979 2047 step=-1;
2048 }
e50912db 2049 TString dir=(step>0 ? "outward" : "inward");
67c1e979 2050
6518a6c5 2051 for (Int_t ilayer=from; ilayer != to; ilayer += step) {
2052 AliITSlayer &layer=fgLayers[ilayer];
67c1e979 2053 Double_t r=layer.GetR();
afd25725 2054 if (step<0 && xx>r) break;
2055
2056 // material between SSD and SDD, SDD and SPD
6518a6c5 2057 Double_t hI=ilayer-0.5*step;
e50912db 2058 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
2059 if(!CorrectForShieldMaterial(t,"SDD",dir)) return kFALSE;
2060 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
2061 if(!CorrectForShieldMaterial(t,"SPD",dir)) return kFALSE;
67c1e979 2062
2063 // remember old position [SR, GSI 18.02.2003]
2064 Double_t oldX=0., oldY=0., oldZ=0.;
2065 if (t->IsStartedTimeIntegral() && step==1) {
2066 t->GetGlobalXYZat(t->GetX(),oldX,oldY,oldZ);
2067 }
2068 //
afd25725 2069 Double_t oldGlobXYZ[3];
2070 t->GetXYZ(oldGlobXYZ);
2071
8602c008 2072 Double_t phi,z;
2073 if (!t->GetPhiZat(r,phi,z)) return kFALSE;
67c1e979 2074
67c1e979 2075 Int_t idet=layer.FindDetectorIndex(phi,z);
6518a6c5 2076
2077 // check if we allow a prolongation without point for large-eta tracks
2078 Int_t skip = CheckSkipLayer(t,ilayer,idet);
2079 if (skip==2) {
2080 // propagate to the layer radius
2081 Double_t xToGo; t->GetLocalXat(r,xToGo);
2082 t->AliExternalTrackParam::PropagateTo(xToGo,GetBz());
2083 // apply correction for material of the current layer
2084 CorrectForLayerMaterial(t,ilayer,oldGlobXYZ,dir);
2085 // track time update [SR, GSI 17.02.2003]
2086 if (t->IsStartedTimeIntegral() && step==1) {
2087 Double_t newX, newY, newZ;
2088 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
2089 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
2090 (oldZ-newZ)*(oldZ-newZ);
2091 t->AddTimeStep(TMath::Sqrt(dL2));
2092 }
2093 continue;
2094 }
2095
e50912db 2096 if (idet<0) return kFALSE;
67c1e979 2097 const AliITSdetector &det=layer.GetDetector(idet);
2098 phi=det.GetPhi();
e50912db 2099 if (!t->Propagate(phi,det.GetR())) return kFALSE;
67c1e979 2100 t->SetDetectorIndex(idet);
2101
00a7cc50 2102 const AliITSRecPoint *cl=0;
44347160 2103 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
67c1e979 2104
6518a6c5 2105 Int_t idx=index[ilayer];
0653282c 2106 if (idx>=0) {
00a7cc50 2107 const AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(idx);
67c1e979 2108 if (c){
2109 if (idet != c->GetDetectorIndex()) {
2110 idet=c->GetDetectorIndex();
2111 const AliITSdetector &det=layer.GetDetector(idet);
2112 if (!t->Propagate(det.GetPhi(),det.GetR())) {
2113 return kFALSE;
2114 }
2115 t->SetDetectorIndex(idet);
2116 }
2117 //Double_t chi2=t->GetPredictedChi2(c);
2118 Int_t layer = (idx & 0xf0000000) >> 28;;
2119 Double_t chi2=GetPredictedChi2MI(t,c,layer);
2120 if (chi2<maxchi2) {
2121 cl=c;
2122 maxchi2=chi2;
2123 } else {
2124 return kFALSE;
2125 }
e43c066c 2126 }
2127 }
e43c066c 2128
e43c066c 2129 if (cl) {
afd25725 2130 if (!UpdateMI(t,cl,maxchi2,idx)) return kFALSE;
e43c066c 2131 t->SetSampledEdx(cl->GetQ(),t->GetNumberOfClusters()-1);
2132 }
2133
afd25725 2134 // Correct for material of the current layer
6518a6c5 2135 if(!CorrectForLayerMaterial(t,ilayer,oldGlobXYZ,dir)) return kFALSE;
e43c066c 2136
2137 // track time update [SR, GSI 17.02.2003]
2138 if (t->IsStartedTimeIntegral() && step==1) {
2139 Double_t newX, newY, newZ;
2140 t->GetGlobalXYZat(t->GetX(),newX,newY,newZ);
2141 Double_t dL2 = (oldX-newX)*(oldX-newX) + (oldY-newY)*(oldY-newY) +
2142 (oldZ-newZ)*(oldZ-newZ);
2143 t->AddTimeStep(TMath::Sqrt(dL2));
2144 }
2145 //
2146
2147 }
2148
2149 if (!t->PropagateTo(xx,0.,0.)) return kFALSE;
2150 return kTRUE;
2151}
44347160 2152//------------------------------------------------------------------------
15dd636f 2153Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
e43c066c 2154{
2155 //
2156 // calculate normalized chi2
2157 // return NormalizedChi2(track,0);
2158 Float_t chi2 = 0;
2159 Float_t sum=0;
2160 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2161 // track->fdEdxMismatch=0;
2162 Float_t dedxmismatch =0;
2163 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2164 if (mode<100){
2165 for (Int_t i = 0;i<6;i++){
b9671574 2166 if (track->GetClIndex(i)>0){
e43c066c 2167 Float_t cerry, cerrz;
2168 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2169 else
b9671574 2170 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2171 cerry*=cerry;
2172 cerrz*=cerrz;
b9671574 2173 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
572f41f9 2174 if (i>1 && AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(i)) {
b9671574 2175 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
e43c066c 2176 if (ratio<0.5) {
2177 cchi2+=(0.5-ratio)*10.;
2178 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2179 dedxmismatch+=(0.5-ratio)*10.;
2180 }
2181 }
2182 if (i<2 ||i>3){
b9671574 2183 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
e43c066c 2184 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2185 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2186 if (i<2) chi2+=2*cl->GetDeltaProbability();
2187 }
2188 chi2+=cchi2;
2189 sum++;
2190 }
2191 }
b9671574 2192 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2193 track->SetdEdxMismatch(dedxmismatch);
e43c066c 2194 }
2195 }
2196 else{
2197 for (Int_t i = 0;i<4;i++){
b9671574 2198 if (track->GetClIndex(i)>0){
e43c066c 2199 Float_t cerry, cerrz;
2200 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 2201 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2202 cerry*=cerry;
2203 cerrz*=cerrz;
b9671574 2204 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2205 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 2206 sum++;
2207 }
2208 }
2209 for (Int_t i = 4;i<6;i++){
b9671574 2210 if (track->GetClIndex(i)>0){
e43c066c 2211 Float_t cerry, cerrz;
2212 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 2213 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2214 cerry*=cerry;
2215 cerrz*=cerrz;
2216 Float_t cerryb, cerrzb;
2217 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
b9671574 2218 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
e43c066c 2219 cerryb*=cerryb;
2220 cerrzb*=cerrzb;
b9671574 2221 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2222 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 2223 sum++;
2224 }
2225 }
2226 }
b9671574 2227 if (track->GetESDtrack()->GetTPCsignal()>85){
2228 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
e43c066c 2229 if (ratio<0.5) {
2230 chi2+=(0.5-ratio)*5.;
2231 }
2232 if (ratio>2){
2233 chi2+=(ratio-2.0)*3;
2234 }
2235 }
2236 //
b9671574 2237 Double_t match = TMath::Sqrt(track->GetChi22());
2238 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2755f080 2239 if (!track->GetConstrain()) {
2240 if (track->GetNumberOfClusters()>2) {
2241 match/=track->GetNumberOfClusters()-2.;
2242 } else {
2243 match=0;
2244 }
2245 }
e43c066c 2246 if (match<0) match=0;
b9671574 2247 Float_t deadzonefactor = (track->GetNDeadZone()>0) ? 3*(1.1-track->GetDeadZoneProbability()):0.;
2248 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2249 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2250 1./(1.+track->GetNSkipped()));
e43c066c 2251
2252 return normchi2;
2253}
44347160 2254//------------------------------------------------------------------------
15dd636f 2255Double_t AliITStrackerMI::GetMatchingChi2(AliITStrackMI * track1, AliITStrackMI * track2)
e43c066c 2256{
2257 //
2258 // return matching chi2 between two tracks
15dd636f 2259 AliITStrackMI track3(*track2);
e43c066c 2260 track3.Propagate(track1->GetAlpha(),track1->GetX());
2261 TMatrixD vec(5,1);
6c94f330 2262 vec(0,0)=track1->GetY() - track3.GetY();
2263 vec(1,0)=track1->GetZ() - track3.GetZ();
2264 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2265 vec(3,0)=track1->GetTgl() - track3.GetTgl();
6c23ffed 2266 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
e43c066c 2267 //
2268 TMatrixD cov(5,5);
6c94f330 2269 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2270 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2271 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2272 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2273 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
e43c066c 2274
6c94f330 2275 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2276 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2277 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2278 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
e43c066c 2279 //
6c94f330 2280 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2281 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2282 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
e43c066c 2283 //
6c94f330 2284 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2285 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
e43c066c 2286 //
6c94f330 2287 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
e43c066c 2288
2289 cov.Invert();
2290 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2291 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2292 return chi2(0,0);
2293}
44347160 2294//------------------------------------------------------------------------
6518a6c5 2295Double_t AliITStrackerMI::GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr)
e43c066c 2296{
2297 //
afd25725 2298 // return probability that given point (characterized by z position and error)
2299 // is in SPD dead zone
e43c066c 2300 //
afd25725 2301 Double_t probability = 0.;
e43c066c 2302 Double_t absz = TMath::Abs(zpos);
afd25725 2303 Double_t nearestz = (absz<2.) ? 0.5*(fSPDdetzcentre[1]+fSPDdetzcentre[2]) :
2304 0.5*(fSPDdetzcentre[2]+fSPDdetzcentre[3]);
2305 if (TMath::Abs(absz-nearestz)>0.25+3.*zerr) return probability;
2306 Double_t zmin, zmax;
2307 if (zpos<-6.) { // dead zone at z = -7
e50912db 2308 zmin = fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2309 zmax = fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2310 } else if (zpos>6.) { // dead zone at z = +7
e50912db 2311 zmin = fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2312 zmax = fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2313 } else if (absz<2.) { // dead zone at z = 0
e50912db 2314 zmin = fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2315 zmax = fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2316 } else {
2317 zmin = 0.;
2318 zmax = 0.;
e43c066c 2319 }
afd25725 2320 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2321 // dead zone)
2322 probability = 0.5*( TMath::Erf((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2323 TMath::Erf((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
e43c066c 2324 return probability;
2325}
44347160 2326//------------------------------------------------------------------------
15dd636f 2327Double_t AliITStrackerMI::GetTruncatedChi2(AliITStrackMI * track, Float_t fac)
e43c066c 2328{
2329 //
2330 // calculate normalized chi2
2331 Float_t chi2[6];
2332 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2333 Float_t ncl = 0;
2334 for (Int_t i = 0;i<6;i++){
b9671574 2335 if (TMath::Abs(track->GetDy(i))>0){
2336 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2337 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
e43c066c 2338 ncl++;
2339 }
2340 else{chi2[i]=10000;}
2341 }
2342 Int_t index[6];
2343 TMath::Sort(6,chi2,index,kFALSE);
2344 Float_t max = float(ncl)*fac-1.;
2345 Float_t sumchi=0, sumweight=0;
2346 for (Int_t i=0;i<max+1;i++){
2347 Float_t weight = (i<max)?1.:(max+1.-i);
2348 sumchi+=weight*chi2[index[i]];
2349 sumweight+=weight;
2350 }
2351 Double_t normchi2 = sumchi/sumweight;
2352 return normchi2;
2353}
44347160 2354//------------------------------------------------------------------------
15dd636f 2355Double_t AliITStrackerMI::GetInterpolatedChi2(AliITStrackMI * forwardtrack, AliITStrackMI * backtrack)
e43c066c 2356{
2357 //
2358 // calculate normalized chi2
2359 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2360 Int_t npoints = 0;
2361 Double_t res =0;
2362 for (Int_t i=0;i<6;i++){
b9671574 2363 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2364 Double_t sy1 = forwardtrack->GetSigmaY(i);
2365 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2366 Double_t sy2 = backtrack->GetSigmaY(i);
2367 Double_t sz2 = backtrack->GetSigmaZ(i);
e43c066c 2368 if (i<2){ sy2=1000.;sz2=1000;}
2369 //
b9671574 2370 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2371 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
e43c066c 2372 //
2373 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2374 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2375 //
2376 res+= nz0*nz0+ny0*ny0;
2377 npoints++;
2378 }
2379 if (npoints>1) return
6c23ffed 2380 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
e43c066c 2381 //2*forwardtrack->fNUsed+
b9671574 2382 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2383 1./(1.+forwardtrack->GetNSkipped()));
e43c066c 2384 return 1000;
2385}
44347160 2386//------------------------------------------------------------------------
e43c066c 2387Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2388 //--------------------------------------------------------------------
2389 // Return pointer to a given cluster
2390 //--------------------------------------------------------------------
2391 Int_t l=(index & 0xf0000000) >> 28;
2392 Int_t c=(index & 0x0fffffff) >> 00;
2393 return fgLayers[l].GetWeight(c);
2394}
44347160 2395//------------------------------------------------------------------------
15dd636f 2396void AliITStrackerMI::RegisterClusterTracks(AliITStrackMI* track,Int_t id)
e43c066c 2397{
2398 //---------------------------------------------
2399 // register track to the list
628e7bb0 2400 //
b9671574 2401 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
628e7bb0 2402 //
2403 //
e43c066c 2404 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2405 Int_t index = track->GetClusterIndex(icluster);
2406 Int_t l=(index & 0xf0000000) >> 28;
2407 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2408 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2409 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2410 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2411 fgLayers[l].SetClusterTracks(itrack,c,id);
e43c066c 2412 break;
2413 }
2414 }
2415 }
2416}
44347160 2417//------------------------------------------------------------------------
15dd636f 2418void AliITStrackerMI::UnRegisterClusterTracks(AliITStrackMI* track, Int_t id)
e43c066c 2419{
2420 //---------------------------------------------
2421 // unregister track from the list
2422 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2423 Int_t index = track->GetClusterIndex(icluster);
2424 Int_t l=(index & 0xf0000000) >> 28;
2425 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2426 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2427 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2428 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2429 fgLayers[l].SetClusterTracks(itrack,c,-1);
e43c066c 2430 }
2431 }
2432 }
2433}
44347160 2434//------------------------------------------------------------------------
00a7cc50 2435Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
e43c066c 2436{
2437 //-------------------------------------------------------------
2438 //get number of shared clusters
2439 //-------------------------------------------------------------
2440 Float_t shared=0;
2441 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2442 // mean number of clusters
2443 Float_t *ny = GetNy(id), *nz = GetNz(id);
2444
2445
2446 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2447 Int_t index = track->GetClusterIndex(icluster);
2448 Int_t l=(index & 0xf0000000) >> 28;
2449 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2450 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2451 if (ny[l]==0){
2452 printf("problem\n");
2453 }
00a7cc50 2454 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2455 Float_t weight=1;
2456 //
2457 Float_t deltan = 0;
2458 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
572f41f9 2459 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2460 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2461 if (l<2 || l>3){
2462 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2463 }
2464 else{
2465 deltan = (cl->GetNz()-nz[l]);
2466 }
2467 if (deltan>2.0) continue; // extended - highly probable shared cluster
2468 weight = 2./TMath::Max(3.+deltan,2.);
2469 //
2470 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2471 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
e43c066c 2472 list[l]=index;
00a7cc50 2473 clist[l] = (AliITSRecPoint*)GetCluster(index);
e43c066c 2474 shared+=weight;
2475 break;
2476 }
2477 }
2478 }
b9671574 2479 track->SetNUsed(shared);
e43c066c 2480 return shared;
2481}
44347160 2482//------------------------------------------------------------------------
15dd636f 2483Int_t AliITStrackerMI::GetOverlapTrack(AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
e43c066c 2484{
2485 //
2486 // find first shared track
2487 //
2488 // mean number of clusters
2489 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2490 //
2491 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2492 Int_t sharedtrack=100000;
2493 Int_t tracks[24],trackindex=0;
2494 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2495 //
2496 for (Int_t icluster=0;icluster<6;icluster++){
2497 if (clusterlist[icluster]<0) continue;
2498 Int_t index = clusterlist[icluster];
2499 Int_t l=(index & 0xf0000000) >> 28;
2500 Int_t c=(index & 0x0fffffff) >> 00;
2501 if (ny[l]==0){
2502 printf("problem\n");
2503 }
b9671574 2504 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2505 //if (l>3) continue;
00a7cc50 2506 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2507 //
2508 Float_t deltan = 0;
2509 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
572f41f9 2510 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2511 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2512 if (l<2 || l>3){
2513 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2514 }
2515 else{
2516 deltan = (cl->GetNz()-nz[l]);
2517 }
2518 if (deltan>2.0) continue; // extended - highly probable shared cluster
2519 //
2520 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2521 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2522 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2523 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
e43c066c 2524 trackindex++;
2525 }
2526 }
2527 }
2528 if (trackindex==0) return -1;
2529 if (trackindex==1){
2530 sharedtrack = tracks[0];
2531 }else{
2532 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2533 else{
2534 //
2535 Int_t track[24], cluster[24];
2536 for (Int_t i=0;i<trackindex;i++){ track[i]=-1; cluster[i]=0;}
2537 Int_t index =0;
2538 //
2539 for (Int_t i=0;i<trackindex;i++){
2540 if (tracks[i]<0) continue;
2541 track[index] = tracks[i];
2542 cluster[index]++;
2543 for (Int_t j=i+1;j<trackindex;j++){
2544 if (tracks[j]<0) continue;
2545 if (tracks[j]==tracks[i]){
2546 cluster[index]++;
2547 tracks[j]=-1;
2548 }
2549 }
2550 index++;
2551 }
2552 Int_t max=0;
2553 for (Int_t i=0;i<index;i++){
2554 if (cluster[index]>max) {
2555 sharedtrack=track[index];
2556 max=cluster[index];
2557 }
2558 }
2559 }
2560 }
2561
2562 if (sharedtrack>=100000) return -1;
2563 //
2564 // make list of overlaps
2565 shared =0;
2566 for (Int_t icluster=0;icluster<6;icluster++){
2567 if (clusterlist[icluster]<0) continue;
2568 Int_t index = clusterlist[icluster];
2569 Int_t l=(index & 0xf0000000) >> 28;
2570 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2571 if (c>fgLayers[l].GetNumberOfClusters()) continue;
00a7cc50 2572 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2573 if (l==0 || l==1){
2574 if (cl->GetNy()>2) continue;
2575 if (cl->GetNz()>2) continue;
2576 }
2577 if (l==4 || l==5){
2578 if (cl->GetNy()>3) continue;
2579 if (cl->GetNz()>3) continue;
2580 }
2581 //
2582 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2583 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2584 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
e43c066c 2585 overlist[l]=index;
2586 shared++;
2587 }
2588 }
2589 }
2590 return sharedtrack;
2591}
44347160 2592//------------------------------------------------------------------------
15dd636f 2593AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
e43c066c 2594 //
2595 // try to find track hypothesys without conflicts
2596 // with minimal chi2;
2597 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2598 Int_t entries1 = arr1->GetEntriesFast();
2599 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
15dd636f 2600 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2601 Int_t entries2 = arr2->GetEntriesFast();
15dd636f 2602 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2603 //
15dd636f 2604 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2605 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
6c23ffed 2606 if (track10->Pt()>0.5+track20->Pt()) return track10;
e43c066c 2607
2608 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2609 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2610 UnRegisterClusterTracks(track,trackID1);
2611 }
2612 //
2613 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2614 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2615 UnRegisterClusterTracks(track,trackID2);
2616 }
2617 Int_t index1=0;
2618 Int_t index2=0;
2619 Float_t maxconflicts=6;
2620 Double_t maxchi2 =1000.;
2621 //
2622 // get weight of hypothesys - using best hypothesy
2623 Double_t w1,w2;
2624
2625 Int_t list1[6],list2[6];
00a7cc50 2626 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2627 RegisterClusterTracks(track10,trackID1);
2628 RegisterClusterTracks(track20,trackID2);
2629 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2630 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2631 UnRegisterClusterTracks(track10,trackID1);
2632 UnRegisterClusterTracks(track20,trackID2);
2633 //
2634 // normalized chi2
2635 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2636 Float_t nerry[6],nerrz[6];
2637 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2638 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2639 for (Int_t i=0;i<6;i++){
2640 if ( (erry1[i]>0) && (erry2[i]>0)) {
2641 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2642 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2643 }else{
2644 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2645 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2646 }
b9671574 2647 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2648 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2649 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2650 ncl1++;
2651 }
b9671574 2652 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2653 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2654 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2655 ncl2++;
2656 }
2657 }
2658 chi21/=ncl1;
2659 chi22/=ncl2;
2660 //
2661 //
b9671574 2662 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2663 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
e43c066c 2664 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2665 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2666 //
2667 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2668 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
6c23ffed 2669 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
e43c066c 2670 );
2671 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2672 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
6c23ffed 2673 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
e43c066c 2674 );
2675
2676 Double_t sumw = w1+w2;
2677 w1/=sumw;
2678 w2/=sumw;
2679 if (w1<w2*0.5) {
2680 w1 = (d2+0.5)/(d1+d2+1.);
2681 w2 = (d1+0.5)/(d1+d2+1.);
2682 }
2683 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2684 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2685 //
2686 // get pair of "best" hypothesys
2687 //
2688 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2689 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2690
2691 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
15dd636f 2692 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
e43c066c 2693 //if (track1->fFakeRatio>0) continue;
2694 RegisterClusterTracks(track1,trackID1);
2695 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
15dd636f 2696 AliITStrackMI * track2=(AliITStrackMI*) arr2->UncheckedAt(itrack2);
e43c066c 2697
2698 // Float_t current = w1*track1->fChi2MIP[0]+w2*track2->fChi2MIP[0];
2699 //if (track2->fFakeRatio>0) continue;
2700 Float_t nskipped=0;
2701 RegisterClusterTracks(track2,trackID2);
2702 Int_t list1[6],list2[6];
00a7cc50 2703 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2704 Float_t cconflict1 = GetNumberOfSharedClusters(track1,trackID1,list1,clist1);
2705 Float_t cconflict2 = GetNumberOfSharedClusters(track2,trackID2,list2,clist2);
2706 UnRegisterClusterTracks(track2,trackID2);
2707 //
b9671574 2708 if (track1->GetConstrain()) nskipped+=w1*track1->GetNSkipped();
2709 if (track2->GetConstrain()) nskipped+=w2*track2->GetNSkipped();
e43c066c 2710 if (nskipped>0.5) continue;
2711 //
2712 //if ( w1*conflict1+w2*conflict2>maxconflicts0) continue;
2713 if (conflict1+1<cconflict1) continue;
2714 if (conflict2+1<cconflict2) continue;
2715 Float_t conflict=0;
2716 Float_t sumchi2=0;
2717 Float_t sum=0;
2718 for (Int_t i=0;i<6;i++){
2719 //
2720 Float_t c1 =0.; // conflict coeficients
2721 Float_t c2 =0.;
2722 if (clist1[i]&&clist2[i]){
2723 Float_t deltan = 0;
2724 if (i<2 || i>3){
2725 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-TMath::Max(ny1[i],ny2[i])-TMath::Max(nz1[i],nz2[i]));
2726 }
2727 else{
2728 deltan = (clist1[i]->GetNz()-TMath::Max(nz1[i],nz2[i]));
2729 }
2730 c1 = 2./TMath::Max(3.+deltan,2.);
2731 c2 = 2./TMath::Max(3.+deltan,2.);
2732 }
2733 else{
2734 if (clist1[i]){
2735 Float_t deltan = 0;
2736 if (i<2 || i>3){
2737 deltan = (clist1[i]->GetNy()+clist1[i]->GetNz()-ny1[i]-nz1[i]);
2738 }
2739 else{
2740 deltan = (clist1[i]->GetNz()-nz1[i]);
2741 }
2742 c1 = 2./TMath::Max(3.+deltan,2.);
2743 c2 = 0;
2744 }
2745
2746 if (clist2[i]){
2747 Float_t deltan = 0;
2748 if (i<2 || i>3){
2749 deltan = (clist2[i]->GetNy()+clist2[i]->GetNz()-ny2[i]-nz2[i]);
2750 }
2751 else{
2752 deltan = (clist2[i]->GetNz()-nz2[i]);
2753 }
2754 c2 = 2./TMath::Max(3.+deltan,2.);
2755 c1 = 0;
2756 }
2757 }
2758 //
2759 Double_t chi21=0,chi22=0;
b9671574 2760 if (TMath::Abs(track1->GetDy(i))>0.) {
2761 chi21 = (track1->GetDy(i)/track1->GetSigmaY(i))*(track1->GetDy(i)/track1->GetSigmaY(i))+
2762 (track1->GetDz(i)/track1->GetSigmaZ(i))*(track1->GetDz(i)/track1->GetSigmaZ(i));
e43c066c 2763 //chi21 = (track1->fDy[i]*track1->fDy[i])/(nerry[i]*nerry[i])+
b9671574 2764 // (track1->GetDz(i)*track1->GetDz(i))/(nerrz[i]*nerrz[i]);
e43c066c 2765 }else{
b9671574 2766 if (TMath::Abs(track1->GetSigmaY(i)>0.)) c1=1;
e43c066c 2767 }
2768 //
b9671574 2769 if (TMath::Abs(track2->GetDy(i))>0.) {
2770 chi22 = (track2->GetDy(i)/track2->GetSigmaY(i))*(track2->GetDy(i)/track2->GetSigmaY(i))+
2771 (track2->GetDz(i)/track2->GetSigmaZ(i))*(track2->GetDz(i)/track2->GetSigmaZ(i));
e43c066c 2772 //chi22 = (track2->fDy[i]*track2->fDy[i])/(nerry[i]*nerry[i])+
2773 // (track2->fDz[i]*track2->fDz[i])/(nerrz[i]*nerrz[i]);
2774 }
2775 else{
b9671574 2776 if (TMath::Abs(track2->GetSigmaY(i)>0.)) c2=1;
e43c066c 2777 }
2778 sumchi2+=w1*(1.+c1)*(1+c1)*(chi21+c1)+w2*(1.+c2)*(1+c2)*(chi22+c2);
2779 if (chi21>0) sum+=w1;
2780 if (chi22>0) sum+=w2;
2781 conflict+=(c1+c2);
2782 }
b9671574 2783 Double_t norm = sum-w1*track1->GetNSkipped()-w2*track2->GetNSkipped();
2784 if (norm<0) norm =1/(w1*track1->GetNSkipped()+w2*track2->GetNSkipped());
e43c066c 2785 Double_t normchi2 = 2*conflict+sumchi2/sum;
2786 if ( normchi2 <maxchi2 ){
2787 index1 = itrack1;
2788 index2 = itrack2;
2789 maxconflicts = conflict;
2790 maxchi2 = normchi2;
2791 }
2792 }
2793 UnRegisterClusterTracks(track1,trackID1);
2794 }
2795 //
2796 // if (maxconflicts<4 && maxchi2<th0){
2797 if (maxchi2<th0*2.){
b9671574 2798 Float_t orig = track10->GetFakeRatio()*track10->GetNumberOfClusters();
15dd636f 2799 AliITStrackMI* track1=(AliITStrackMI*) arr1->UncheckedAt(index1);
b9671574 2800 track1->SetChi2MIP(5,maxconflicts);
2801 track1->SetChi2MIP(6,maxchi2);
2802 track1->SetChi2MIP(7,0.01+orig-(track1->GetFakeRatio()*track1->GetNumberOfClusters()));
e43c066c 2803 // track1->UpdateESDtrack(AliESDtrack::kITSin);
b9671574 2804 track1->SetChi2MIP(8,index1);
e43c066c 2805 fBestTrackIndex[trackID1] =index1;
2806 UpdateESDtrack(track1, AliESDtrack::kITSin);
2807 }
b9671574 2808 else if (track10->GetChi2MIP(0)<th1){
2809 track10->SetChi2MIP(5,maxconflicts);
2810 track10->SetChi2MIP(6,maxchi2);
e43c066c 2811 // track10->UpdateESDtrack(AliESDtrack::kITSin);
2812 UpdateESDtrack(track10,AliESDtrack::kITSin);
2813 }
2814
2815 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2816 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2817 UnRegisterClusterTracks(track,trackID1);
2818 }
2819 //
2820 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2821 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2822 UnRegisterClusterTracks(track,trackID2);
2823 }
2824
44347160 2825 if (track10->GetConstrain()&&track10->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2826 &&track10->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2827 // if (track10->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track10->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2828 // &&track10->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track10->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
e43c066c 2829 RegisterClusterTracks(track10,trackID1);
2830 }
44347160 2831 if (track20->GetConstrain()&&track20->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2832 &&track20->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
2833 //if (track20->fChi2MIP[0]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track20->fChi2MIP[1]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
2834 // &&track20->fChi2MIP[2]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&track20->fChi2MIP[3]<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
e43c066c 2835 RegisterClusterTracks(track20,trackID2);
2836 }
2837 return track10;
2838
2839}
44347160 2840//------------------------------------------------------------------------
e43c066c 2841void AliITStrackerMI::UseClusters(const AliKalmanTrack *t, Int_t from) const {
2842 //--------------------------------------------------------------------
2843 // This function marks clusters assigned to the track
2844 //--------------------------------------------------------------------
2845 AliTracker::UseClusters(t,from);
2846
00a7cc50 2847 AliITSRecPoint *c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(0));
e43c066c 2848 //if (c->GetQ()>2) c->Use();
2849 if (c->GetSigmaZ2()>0.1) c->Use();
00a7cc50 2850 c=(AliITSRecPoint *)GetCluster(t->GetClusterIndex(1));
e43c066c 2851 //if (c->GetQ()>2) c->Use();
2852 if (c->GetSigmaZ2()>0.1) c->Use();
2853
2854}
44347160 2855//------------------------------------------------------------------------
15dd636f 2856void AliITStrackerMI::AddTrackHypothesys(AliITStrackMI * track, Int_t esdindex)
e43c066c 2857{
2858 //------------------------------------------------------------------
2859 // add track to the list of hypothesys
2860 //------------------------------------------------------------------
2861
2862 if (esdindex>=fTrackHypothesys.GetEntriesFast()) fTrackHypothesys.Expand(esdindex*2+10);
2863 //
2864 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2865 if (!array) {
2866 array = new TObjArray(10);
2867 fTrackHypothesys.AddAt(array,esdindex);
2868 }
2869 array->AddLast(track);
2870}
44347160 2871//------------------------------------------------------------------------
e43c066c 2872void AliITStrackerMI::SortTrackHypothesys(Int_t esdindex, Int_t maxcut, Int_t mode)
2873{
2874 //-------------------------------------------------------------------
2875 // compress array of track hypothesys
2876 // keep only maxsize best hypothesys
2877 //-------------------------------------------------------------------
2878 if (esdindex>fTrackHypothesys.GetEntriesFast()) return;
2879 if (! (fTrackHypothesys.At(esdindex)) ) return;
2880 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
2881 Int_t entries = array->GetEntriesFast();
2882 //
2883 //- find preliminary besttrack as a reference
2884 Float_t minchi2=10000;
2885 Int_t maxn=0;
15dd636f 2886 AliITStrackMI * besttrack=0;
e43c066c 2887 for (Int_t itrack=0;itrack<array->GetEntriesFast();itrack++){
15dd636f 2888 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2889 if (!track) continue;
2890 Float_t chi2 = NormalizedChi2(track,0);
2891 //
b9671574 2892 Int_t tpcLabel=track->GetESDtrack()->GetTPCLabel();
e43c066c 2893 track->SetLabel(tpcLabel);
2894 CookdEdx(track);
b9671574 2895 track->SetFakeRatio(1.);
e43c066c 2896 CookLabel(track,0.); //For comparison only
2897 //
44347160 2898 //if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&track->fFakeRatio==0){
2899 if (chi2<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
e43c066c 2900 if (track->GetNumberOfClusters()<maxn) continue;
2901 maxn = track->GetNumberOfClusters();
2902 if (chi2<minchi2){
2903 minchi2=chi2;
2904 besttrack=track;
2905 }
2906 }
2907 else{
b9671574 2908 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2909 delete array->RemoveAt(itrack);
2910 }
e43c066c 2911 }
2912 }
2913 if (!besttrack) return;
2914 //
2915 //
2916 //take errors of best track as a reference
2917 Float_t *erry = GetErrY(esdindex), *errz = GetErrZ(esdindex);
2918 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
2919 for (Int_t i=0;i<6;i++) {
b9671574 2920 if (besttrack->GetClIndex(i)>0){
2921 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2922 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2923 ny[i] = besttrack->GetNy(i);
2924 nz[i] = besttrack->GetNz(i);
e43c066c 2925 }
2926 }
2927 //
2928 // calculate normalized chi2
2929 //
2930 Float_t * chi2 = new Float_t[entries];
2931 Int_t * index = new Int_t[entries];
2932 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2933 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2934 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2935 if (track){
b9671574 2936 track->SetChi2MIP(0,GetNormalizedChi2(track, mode));
44347160 2937 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
b9671574 2938 chi2[itrack] = track->GetChi2MIP(0);
628e7bb0 2939 else{
b9671574 2940 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2941 delete array->RemoveAt(itrack);
2942 }
2943 }
e43c066c 2944 }
2945 }
2946 //
2947 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2948 besttrack = (AliITStrackMI*)array->At(index[0]);
44347160 2949 if (besttrack&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)){
e43c066c 2950 for (Int_t i=0;i<6;i++){
b9671574 2951 if (besttrack->GetClIndex(i)>0){
2952 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2953 errz[i] = besttrack->GetSigmaZ(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2954 ny[i] = besttrack->GetNy(i);
2955 nz[i] = besttrack->GetNz(i);
e43c066c 2956 }
2957 }
2958 }
2959 //
2960 // calculate one more time with updated normalized errors
2961 for (Int_t i=0;i<entries;i++) chi2[i] =10000;
2962 for (Int_t itrack=0;itrack<entries;itrack++){
15dd636f 2963 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
e43c066c 2964 if (track){
b9671574 2965 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
44347160 2966 if (track->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0))
b9671574 2967 chi2[itrack] = track->GetChi2MIP(0)-0*(track->GetNumberOfClusters()+track->GetNDeadZone());
628e7bb0 2968 else
2969 {
b9671574 2970 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 2971 delete array->RemoveAt(itrack);
2972 }
2973 }
e43c066c 2974 }
2975 }
2976 entries = array->GetEntriesFast();
2977 //
628e7bb0 2978 //
e43c066c 2979 if (entries>0){
2980 TObjArray * newarray = new TObjArray();
2981 TMath::Sort(entries,chi2,index,kFALSE);
15dd636f 2982 besttrack = (AliITStrackMI*)array->At(index[0]);
e43c066c 2983 if (besttrack){
2984 //
2985 for (Int_t i=0;i<6;i++){
b9671574 2986 if (besttrack->GetNz(i)>0&&besttrack->GetNy(i)>0){
2987 erry[i] = besttrack->GetSigmaY(i); erry[i+6] = besttrack->GetSigmaY(i+6);
2988 errz[i] = besttrack->GetSigmaZ(i); errz[i+6] = besttrack->GetSigmaZ(i+6);
2989 ny[i] = besttrack->GetNy(i);
2990 nz[i] = besttrack->GetNz(i);
e43c066c 2991 }
2992 }
b9671574 2993 besttrack->SetChi2MIP(0,GetNormalizedChi2(besttrack,mode));
44347160 2994 Float_t minchi2 = TMath::Min(besttrack->GetChi2MIP(0)+5.+besttrack->GetNUsed(), double(AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)));
e43c066c 2995 Float_t minn = besttrack->GetNumberOfClusters()-3;
2996 Int_t accepted=0;
2997 for (Int_t i=0;i<entries;i++){
15dd636f 2998 AliITStrackMI * track = (AliITStrackMI*)array->At(index[i]);
e43c066c 2999 if (!track) continue;
3000 if (accepted>maxcut) break;
b9671574 3001 track->SetChi2MIP(0,GetNormalizedChi2(track,mode));
3002 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
3003 if (track->GetNumberOfClusters()<6 && (track->GetChi2MIP(0)+track->GetNUsed()>minchi2)){
628e7bb0 3004 delete array->RemoveAt(index[i]);
3005 continue;
3006 }
e43c066c 3007 }
b9671574 3008 Bool_t shortbest = !track->GetConstrain() && track->GetNumberOfClusters()<6;
3009 if ((track->GetChi2MIP(0)+track->GetNUsed()<minchi2 && track->GetNumberOfClusters()>=minn) ||shortbest){
628e7bb0 3010 if (!shortbest) accepted++;
e43c066c 3011 //
3012 newarray->AddLast(array->RemoveAt(index[i]));
3013 for (Int_t i=0;i<6;i++){
3014 if (nz[i]==0){
b9671574 3015 erry[i] = track->GetSigmaY(i); erry[i+6] = track->GetSigmaY(i+6);
3016 errz[i] = track->GetSigmaZ(i); errz[i] = track->GetSigmaZ(i+6);
3017 ny[i] = track->GetNy(i);
3018 nz[i] = track->GetNz(i);
e43c066c 3019 }
3020 }
3021 }
3022 else{
3023 delete array->RemoveAt(index[i]);
3024 }
3025 }
3026 array->Delete();
3027 delete fTrackHypothesys.RemoveAt(esdindex);
3028 fTrackHypothesys.AddAt(newarray,esdindex);
3029 }
3030 else{
3031 array->Delete();
3032 delete fTrackHypothesys.RemoveAt(esdindex);
3033 }
3034 }
3035 delete [] chi2;
3036 delete [] index;
3037}
44347160 3038//------------------------------------------------------------------------
15dd636f 3039AliITStrackMI * AliITStrackerMI::GetBestHypothesys(Int_t esdindex, AliITStrackMI * original, Int_t checkmax)
e43c066c 3040{
3041 //-------------------------------------------------------------
3042 // try to find best hypothesy
3043 // currently - minimal chi2 of track+backpropagated track+matching to the tpc track
3044 //-------------------------------------------------------------
3045 if (fTrackHypothesys.GetEntriesFast()<=esdindex) return 0;
3046 TObjArray * array = (TObjArray*) fTrackHypothesys.At(esdindex);
3047 if (!array) return 0;
3048 Int_t entries = array->GetEntriesFast();
3049 if (!entries) return 0;
3050 Float_t minchi2 = 100000;
15dd636f 3051 AliITStrackMI * besttrack=0;
e43c066c 3052 //
15dd636f 3053 AliITStrackMI * backtrack = new AliITStrackMI(*original);
3054 AliITStrackMI * forwardtrack = new AliITStrackMI(*original);
afd25725 3055 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
3056 Double_t ersVtx[]={GetSigmaX()/3.,GetSigmaY()/3.,GetSigmaZ()/3.};
e43c066c 3057 //
3058 for (Int_t i=0;i<entries;i++){
15dd636f 3059 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 3060 if (!track) continue;
628e7bb0 3061 Float_t sigmarfi,sigmaz;
3062 GetDCASigma(track,sigmarfi,sigmaz);
b9671574 3063 track->SetDnorm(0,sigmarfi);
3064 track->SetDnorm(1,sigmaz);
628e7bb0 3065 //
b9671574 3066 track->SetChi2MIP(1,1000000);
3067 track->SetChi2MIP(2,1000000);
3068 track->SetChi2MIP(3,1000000);
e43c066c 3069 //
3070 // backtrack
15dd636f 3071 backtrack = new(backtrack) AliITStrackMI(*track);
afd25725 3072 if (track->GetConstrain()) {
e50912db 3073 if (!CorrectForPipeMaterial(backtrack,"inward")) continue;
afd25725 3074 if (!backtrack->Improve(0,xyzVtx,ersVtx)) continue;
6c94f330 3075 backtrack->ResetCovariance(10.);
628e7bb0 3076 }else{
6c94f330 3077 backtrack->ResetCovariance(10.);
628e7bb0 3078 }
e43c066c 3079 backtrack->ResetClusters();
628e7bb0 3080
e43c066c 3081 Double_t x = original->GetX();
3082 if (!RefitAt(x,backtrack,track)) continue;
628e7bb0 3083 //
b9671574 3084 track->SetChi2MIP(1,NormalizedChi2(backtrack,0));
e43c066c 3085 //for (Int_t i=2;i<6;i++){track->fDy[i]+=backtrack->fDy[i]; track->fDz[i]+=backtrack->fDz[i];}
44347160 3086 if (track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)*6.) continue;
b9671574 3087 track->SetChi22(GetMatchingChi2(backtrack,original));
e43c066c 3088
b9671574 3089 if ((track->GetConstrain()) && track->GetChi22()>90.) continue;
3090 if ((!track->GetConstrain()) && track->GetChi22()>30.) continue;
3091 if ( track->GetChi22()/track->GetNumberOfClusters()>11.) continue;
e43c066c 3092
3093
44347160 3094 if (!(track->GetConstrain())&&track->GetChi2MIP(1)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)) continue;
e43c066c 3095 //
3096 //forward track - without constraint
15dd636f 3097 forwardtrack = new(forwardtrack) AliITStrackMI(*original);
e43c066c 3098 forwardtrack->ResetClusters();
3099 x = track->GetX();
628e7bb0 3100 RefitAt(x,forwardtrack,track);
b9671574 3101 track->SetChi2MIP(2,NormalizedChi2(forwardtrack,0));
44347160 3102 if (track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)*6.0) continue;
3103 if (!(track->GetConstrain())&&track->GetChi2MIP(2)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)) continue;
e43c066c 3104
791f9a2a 3105 //track->fD[0] = forwardtrack->GetD(GetX(),GetY());
3106 //track->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
b9671574 3107 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),track->GetDP()); //I.B.
3108 forwardtrack->SetD(0,track->GetD(0));
3109 forwardtrack->SetD(1,track->GetD(1));
e43c066c 3110 {
3111 Int_t list[6];
00a7cc50 3112 AliITSRecPoint* clist[6];
b9671574 3113 track->SetChi2MIP(4,GetNumberOfSharedClusters(track,esdindex,list,clist));
3114 if ( (!track->GetConstrain()) && track->GetChi2MIP(4)>1.0) continue;
e43c066c 3115 }
3116
b9671574 3117 track->SetChi2MIP(3,GetInterpolatedChi2(forwardtrack,backtrack));
44347160 3118 if ( (track->GetChi2MIP(3)>6.*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) continue;
3119 if ( (!track->GetConstrain()) && (track->GetChi2MIP(3)>2*AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3))) {
b9671574 3120 track->SetChi2MIP(3,1000);
e43c066c 3121 continue;
3122 }
b9671574 3123 Double_t chi2 = track->GetChi2MIP(0)+track->GetNUsed();
e43c066c 3124 //
3125 for (Int_t ichi=0;ichi<5;ichi++){
b9671574 3126 forwardtrack->SetChi2MIP(ichi, track->GetChi2MIP(ichi));
e43c066c 3127 }
3128 if (chi2 < minchi2){
15dd636f 3129 //besttrack = new AliITStrackMI(*forwardtrack);
99c2ee26 3130 besttrack = track;
e43c066c 3131 besttrack->SetLabel(track->GetLabel());
b9671574 3132 besttrack->SetFakeRatio(track->GetFakeRatio());
e43c066c 3133 minchi2 = chi2;
791f9a2a 3134 //original->fD[0] = forwardtrack->GetD(GetX(),GetY());
3135 //original->fD[1] = forwardtrack->GetZat(GetX())-GetZ();
b9671574 3136 forwardtrack->GetDZ(GetX(),GetY(),GetZ(),original->GetDP()); //I.B.
e43c066c 3137 }
3138 }
3139 delete backtrack;
3140 delete forwardtrack;
3141 Int_t accepted=0;
3142 for (Int_t i=0;i<entries;i++){
15dd636f 3143 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 3144 if (!track) continue;
628e7bb0 3145
44347160 3146 if (accepted>checkmax || track->GetChi2MIP(3)>AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)*6. ||
e43c066c 3147 (track->GetNumberOfClusters()<besttrack->GetNumberOfClusters()-1.)||
b9671574 3148 track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*besttrack->GetNUsed()+3.){
3149 if (track->GetConstrain() || track->GetNumberOfClusters()>5){ //keep best short tracks - without vertex constrain
628e7bb0 3150 delete array->RemoveAt(i);
3151 continue;
3152 }
e43c066c 3153 }
3154 else{
3155 accepted++;
3156 }
3157 }
3158 //
3159 array->Compress();
3160 SortTrackHypothesys(esdindex,checkmax,1);
3161 array = (TObjArray*) fTrackHypothesys.At(esdindex);
afdf9b9c 3162 if (!array) return 0; // PH What can be the reason? Check SortTrackHypothesys
15dd636f 3163 besttrack = (AliITStrackMI*)array->At(0);
e43c066c 3164 if (!besttrack) return 0;
b9671574 3165 besttrack->SetChi2MIP(8,0);
e43c066c 3166 fBestTrackIndex[esdindex]=0;
3167 entries = array->GetEntriesFast();
15dd636f 3168 AliITStrackMI *longtrack =0;
e43c066c 3169 minchi2 =1000;
b9671574 3170 Float_t minn=besttrack->GetNumberOfClusters()+besttrack->GetNDeadZone();
6518a6c5 3171 for (Int_t itrack=entries-1;itrack>0;itrack--) {
15dd636f 3172 AliITStrackMI * track = (AliITStrackMI*)array->At(itrack);
b9671574 3173 if (!track->GetConstrain()) continue;
3174 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3175 if (track->GetChi2MIP(0)-besttrack->GetChi2MIP(0)>0.0) continue;
3176 if (track->GetChi2MIP(0)>4.) continue;
3177 minn = track->GetNumberOfClusters()+track->GetNDeadZone();
e43c066c 3178 longtrack =track;
3179 }
3180 //if (longtrack) besttrack=longtrack;
3181
3182 Int_t list[6];
00a7cc50 3183 AliITSRecPoint * clist[6];
e43c066c 3184 Float_t shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
44347160 3185 if (besttrack->GetConstrain()&&besttrack->GetChi2MIP(0)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(0)&&besttrack->GetChi2MIP(1)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(1)
3186 &&besttrack->GetChi2MIP(2)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(2)&&besttrack->GetChi2MIP(3)<AliITSReconstructor::GetRecoParam()->GetMaxChi2PerCluster(3)){
e43c066c 3187 RegisterClusterTracks(besttrack,esdindex);
3188 }
3189 //
3190 //
3191 if (shared>0.0){
3192 Int_t nshared;
3193 Int_t overlist[6];
3194 Int_t sharedtrack = GetOverlapTrack(besttrack, esdindex, nshared, list, overlist);
3195 if (sharedtrack>=0){
3196 //
3197 besttrack = GetBest2Tracks(esdindex,sharedtrack,10,5.5);
3198 if (besttrack){
3199 shared = GetNumberOfSharedClusters(besttrack,esdindex,list,clist);
3200 }
3201 else return 0;
3202 }
3203 }
3204
3205 if (shared>2.5) return 0;
3206 if (shared>1.0) return besttrack;
3207 //
628e7bb0 3208 // Don't sign clusters if not gold track
3209 //
3210 if (!besttrack->IsGoldPrimary()) return besttrack;
b9671574 3211 if (besttrack->GetESDtrack()->GetKinkIndex(0)!=0) return besttrack; //track belong to kink
628e7bb0 3212 //
e43c066c 3213 if (fConstraint[fPass]){
3214 //
3215 // sign clusters
3216 //
3217 Float_t *ny = GetNy(esdindex), *nz = GetNz(esdindex);
3218 for (Int_t i=0;i<6;i++){
b9671574 3219 Int_t index = besttrack->GetClIndex(i);
e43c066c 3220 if (index<=0) continue;
3221 Int_t ilayer = (index & 0xf0000000) >> 28;
b9671574 3222 if (besttrack->GetSigmaY(ilayer)<0.00000000001) continue;
00a7cc50 3223 AliITSRecPoint *c = (AliITSRecPoint*)GetCluster(index);
e43c066c 3224 if (!c) continue;
3225 if (ilayer>3&&c->GetNy()+c->GetNz()>6) continue;
3226 if ( (c->GetNy()+c->GetNz() )> ny[i]+nz[i]+0.7) continue; //shared track
3227 if ( c->GetNz()> nz[i]+0.7) continue; //shared track
572f41f9 3228 if ( ilayer>2&& AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(ilayer))
3229 if (besttrack->GetNormQ(ilayer)/besttrack->GetExpQ()>1.5) continue;
e43c066c 3230 //if ( c->GetNy()> ny[i]+0.7) continue; //shared track
3231
3232 Bool_t cansign = kTRUE;
3233 for (Int_t itrack=0;itrack<entries; itrack++){
15dd636f 3234 AliITStrackMI * track = (AliITStrackMI*)array->At(i);
e43c066c 3235 if (!track) continue;
b9671574 3236 if (track->GetChi2MIP(0)>besttrack->GetChi2MIP(0)+2.*shared+1.) break;
3237 if ( (track->GetClIndex(ilayer)>0) && (track->GetClIndex(ilayer)!=besttrack->GetClIndex(ilayer))){
e43c066c 3238 cansign = kFALSE;
3239 break;
3240 }
3241 }
3242 if (cansign){
b9671574 3243 if (TMath::Abs(besttrack->GetDy(ilayer)/besttrack->GetSigmaY(ilayer))>3.) continue;
3244 if (TMath::Abs(besttrack->GetDz(ilayer)/besttrack->GetSigmaZ(ilayer))>3.) continue;
e43c066c 3245 if (!c->IsUsed()) c->Use();
3246 }
3247 }
3248 }
3249 return besttrack;
3250}
44347160 3251//------------------------------------------------------------------------
e43c066c 3252void AliITStrackerMI::GetBestHypothesysMIP(TObjArray &itsTracks)
3253{
3254 //
3255 // get "best" hypothesys
628e7bb0 3256 //
e43c066c 3257
3258 Int_t nentries = itsTracks.GetEntriesFast();
3259 for (Int_t i=0;i<nentries;i++){
15dd636f 3260 AliITStrackMI* track = (AliITStrackMI*)itsTracks.At(i);
e43c066c 3261 if (!track) continue;
3262 TObjArray * array = (TObjArray*) fTrackHypothesys.At(i);
3263 if (!array) continue;
3264 if (array->GetEntriesFast()<=0) continue;
3265 //
15dd636f 3266 AliITStrackMI* longtrack=0;
e43c066c 3267 Float_t minn=0;
3268 Float_t maxchi2=1000;
3269 for (Int_t j=0;j<array->GetEntriesFast();j++){
15dd636f 3270 AliITStrackMI* track = (AliITStrackMI*)array->At(j);
e43c066c 3271 if (!track) continue;
b9671574 3272 if (track->GetGoldV0()) {
628e7bb0 3273 longtrack = track; //gold V0 track taken
3274 break;
3275 }
b9671574 3276 if (track->GetNumberOfClusters()+track->GetNDeadZone()<minn) continue;
3277 Float_t chi2 = track->GetChi2MIP(0);
628e7bb0 3278 if (fAfterV0){
b9671574 3279 if (!track->GetGoldV0()&&track->GetConstrain()==kFALSE) chi2+=5;
628e7bb0 3280 }
b9671574 3281 if (track->GetNumberOfClusters()+track->GetNDeadZone()>minn) maxchi2 = track->GetChi2MIP(0);
628e7bb0 3282 //
3283 if (chi2 > maxchi2) continue;
b9671574 3284 minn= track->GetNumberOfClusters()+track->GetNDeadZone();
628e7bb0 3285 maxchi2 = chi2;
e43c066c 3286 longtrack=track;
e43c066c 3287 }
628e7bb0 3288 //
3289 //
3290 //
15dd636f 3291 AliITStrackMI * besttrack = (AliITStrackMI*)array->At(0);
e43c066c 3292 if (!longtrack) {longtrack = besttrack;}
3293 else besttrack= longtrack;
628e7bb0 3294 //
afd25725 3295 if (besttrack) {
e43c066c 3296 Int_t list[6];
00a7cc50 3297 AliITSRecPoint * clist[6];
e43c066c 3298 Float_t shared = GetNumberOfSharedClusters(longtrack,i,list,clist);
3299 //
b9671574 3300 track->SetNUsed(shared);
3301 track->SetNSkipped(besttrack->GetNSkipped());
3302 track->SetChi2MIP(0,besttrack->GetChi2MIP(0));
afd25725 3303 if (shared>0) {
3304 if(!AliITSReconstructor::GetRecoParam()->GetAllowSharedClusters()) continue;
e43c066c 3305 Int_t nshared;
3306 Int_t overlist[6];
3307 //
3308 Int_t sharedtrack = GetOverlapTrack(longtrack, i, nshared, list, overlist);
3309 //if (sharedtrack==-1) sharedtrack=0;
afd25725 3310 if (sharedtrack>=0) {
e43c066c 3311 besttrack = GetBest2Tracks(i,sharedtrack,10,5.5);
3312 }
3313 }
afd25725 3314 if (besttrack&&fAfterV0) {
628e7bb0 3315 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
3316 }
e43c066c 3317 if (besttrack&&fConstraint[fPass])
3318 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
afd25725 3319 if (besttrack->GetChi2MIP(0)+besttrack->GetNUsed()>1.5 && fConstraint[fPass]) {
3320 if ( TMath::Abs(besttrack->GetD(0))>0.1 ||
3321 TMath::Abs(besttrack->GetD(1))>0.1 ) track->SetReconstructed(kFALSE);
e43c066c 3322 }
3323
3324 }
3325 }
3326}
44347160 3327//------------------------------------------------------------------------
15dd636f 3328void AliITStrackerMI::CookLabel(AliITStrackMI *track,Float_t wrong) const {
e43c066c 3329 //--------------------------------------------------------------------
3330 //This function "cooks" a track label. If label<0, this track is fake.
3331 //--------------------------------------------------------------------
3332 Int_t tpcLabel=-1;
3333
b9671574 3334 if ( track->GetESDtrack()) tpcLabel = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
e43c066c 3335
b9671574 3336 track->SetChi2MIP(9,0);
e43c066c 3337 Int_t nwrong=0;
3338 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3339 Int_t cindex = track->GetClusterIndex(i);
3340 Int_t l=(cindex & 0xf0000000) >> 28;
00a7cc50 3341 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
e43c066c 3342 Int_t isWrong=1;
3343 for (Int_t ind=0;ind<3;ind++){
3344 if (tpcLabel>0)
3345 if (cl->GetLabel(ind)==tpcLabel) isWrong=0;
3346 }
b9671574 3347 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
e43c066c 3348 nwrong+=isWrong;
3349 }
7d43b4c4 3350 Int_t nclusters = track->GetNumberOfClusters();
3351 if (nclusters > 0) //PH Some tracks don't have any cluster
3352 track->SetFakeRatio(double(nwrong)/double(nclusters));
e43c066c 3353 if (tpcLabel>0){
b9671574 3354 if (track->GetFakeRatio()>wrong) track->SetLabel(-tpcLabel);
e43c066c 3355 else
b9671574 3356 track->SetLabel(tpcLabel);
e43c066c 3357 }
3358
3359}
44347160 3360//------------------------------------------------------------------------
15dd636f 3361void AliITStrackerMI::CookdEdx(AliITStrackMI* track)
e43c066c 3362{
3363 //
3364 //
3365 // Int_t list[6];
00a7cc50 3366 //AliITSRecPoint * clist[6];
e43c066c 3367 // Int_t shared = GetNumberOfSharedClusters(track,index,list,clist);
3368 Float_t dedx[4];
3369 Int_t accepted=0;
b9671574 3370 track->SetChi2MIP(9,0);
e43c066c 3371 for (Int_t i=0;i<track->GetNumberOfClusters();i++){
3372 Int_t cindex = track->GetClusterIndex(i);
3373 Int_t l=(cindex & 0xf0000000) >> 28;
00a7cc50 3374 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(cindex);
b9671574 3375 Int_t lab = TMath::Abs(track->GetESDtrack()->GetTPCLabel());
e43c066c 3376 Int_t isWrong=1;
3377 for (Int_t ind=0;ind<3;ind++){
3378 if (cl->GetLabel(ind)==lab) isWrong=0;
3379 }
b9671574 3380 track->SetChi2MIP(9,track->GetChi2MIP(9)+isWrong*(2<<l));
e43c066c 3381 if (l<2) continue;
3382 //if (l>3 && (cl->GetNy()>4) || (cl->GetNz()>4)) continue; //shared track
3383 //if (l>3&& !(cl->GetType()==1||cl->GetType()==10)) continue;
3384 //if (l<4&& !(cl->GetType()==1)) continue;
b9671574 3385 dedx[accepted]= track->GetSampledEdx(i);
e43c066c 3386 //dedx[accepted]= track->fNormQ[l];
3387 accepted++;
3388 }
3389 if (accepted<1) {
3390 track->SetdEdx(0);
3391 return;
3392 }
3393 Int_t indexes[4];
3394 TMath::Sort(accepted,dedx,indexes,kFALSE);
3395 Double_t low=0.;
3396 Double_t up=0.51;
3397 Double_t nl=low*accepted, nu =up*accepted;
3398 Float_t sumamp = 0;
3399 Float_t sumweight =0;
3400 for (Int_t i=0; i<accepted; i++) {
3401 Float_t weight =1;
3402 if (i<nl+0.1) weight = TMath::Max(1.-(nl-i),0.);
3403 if (i>nu-1) weight = TMath::Max(nu-i,0.);
3404 sumamp+= dedx[indexes[i]]*weight;
3405 sumweight+=weight;
3406 }
3407 track->SetdEdx(sumamp/sumweight);
3408}
44347160 3409//------------------------------------------------------------------------
e50912db 3410void AliITStrackerMI::MakeCoefficients(Int_t ntracks){
e43c066c 3411 //
3412 //
afd25725 3413 if (fCoefficients) delete []fCoefficients;
3414 fCoefficients = new Float_t[ntracks*48];
3415 for (Int_t i=0;i<ntracks*48;i++) fCoefficients[i]=-1.;
e43c066c 3416}
44347160 3417//------------------------------------------------------------------------
00a7cc50 3418Double_t AliITStrackerMI::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
e43c066c 3419{
3420 //
3421 //
3422 //
3423 Float_t erry,errz;
3424 Float_t theta = track->GetTgl();
3425 Float_t phi = track->GetSnp();
3426 phi = TMath::Sqrt(phi*phi/(1.-phi*phi));
e50912db 3427 AliITSClusterParam::GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz);
e43c066c 3428 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz);
3429 Float_t ny,nz;
e50912db 3430 AliITSClusterParam::GetNTeor(layer,cluster,theta,phi,ny,nz);
e43c066c 3431 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
3432 if (delta>1){
3433 chi2+=0.5*TMath::Min(delta/2,2.);
3434 chi2+=2.*cluster->GetDeltaProbability();
3435 }
3436 //
b9671574 3437 track->SetNy(layer,ny);
3438 track->SetNz(layer,nz);
3439 track->SetSigmaY(layer,erry);
3440 track->SetSigmaZ(layer, errz);
e43c066c 3441 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
b9671574 3442 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/(1.- track->GetSnp()*track->GetSnp())));
e43c066c 3443 return chi2;
3444
3445}
e50912db 3446//------------------------------------------------------------------------
3447Int_t AliITStrackerMI::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
e43c066c 3448{
3449 //
3450 //
3451 //
3452 Int_t layer = (index & 0xf0000000) >> 28;
b9671574 3453 track->SetClIndex(layer, index);
572f41f9 3454 if (layer>1&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(layer)) {
3455 if (track->GetNormQ(layer)/track->GetExpQ()<0.5 ) {
3456 chi2+= (0.5-track->GetNormQ(layer)/track->GetExpQ())*10.;
3457 track->SetdEdxMismatch(track->GetdEdxMismatch()+(0.5-track->GetNormQ(layer)/track->GetExpQ())*10.);
3458 }
e43c066c 3459 }
a504d56f 3460
1f3e997f 3461 if (cl->GetQ()<=0) return 0; // ingore the "virtual" clusters
a504d56f 3462
afd25725 3463 //Float_t clxyz[3]; cl->GetGlobalXYZ(clxyz);Double_t trxyz[3]; track->GetXYZ(trxyz);printf("gtr %f %f %f\n",trxyz[0],trxyz[1],trxyz[2]);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);
3464
3465
1f3e997f 3466 // Take into account the mis-alignment
3467 Double_t x=track->GetX()+cl->GetX();
3468 if (!track->PropagateTo(x,0.,0.)) return 0;
3469
b9671574 3470 return track->UpdateMI(cl->GetY(),cl->GetZ(),track->GetSigmaY(layer),track->GetSigmaZ(layer),chi2,index);
e43c066c 3471}
44347160 3472//------------------------------------------------------------------------
e50912db 3473void AliITStrackerMI::GetDCASigma(AliITStrackMI* track, Float_t & sigmarfi, Float_t &sigmaz)
628e7bb0 3474{
3475 //
3476 //DCA sigmas parameterization
3477 //to be paramterized using external parameters in future
3478 //
3479 //
afd25725 3480 sigmarfi = 0.0040+1.4 *TMath::Abs(track->GetC())+332.*track->GetC()*track->GetC();
3481 sigmaz = 0.0110+4.37*TMath::Abs(track->GetC());
628e7bb0 3482}
e50912db 3483//------------------------------------------------------------------------
e43c066c 3484void AliITStrackerMI::SignDeltas( TObjArray *ClusterArray, Float_t vz)
3485{
3486 //
3487 //
3488 Int_t entries = ClusterArray->GetEntriesFast();
3489 if (entries<4) return;
00a7cc50 3490 AliITSRecPoint* cluster = (AliITSRecPoint*)ClusterArray->At(0);
e43c066c 3491 Int_t layer = cluster->GetLayer();
3492 if (layer>1) return;
3493 Int_t index[10000];
3494 Int_t ncandidates=0;
3495 Float_t r = (layer>0)? 7:4;
3496 //
3497 for (Int_t i=0;i<entries;i++){
00a7cc50 3498 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(i);
e43c066c 3499 Float_t nz = 1+TMath::Abs((cl0->GetZ()-vz)/r);
3500 if (cl0->GetNy()+cl0->GetNz()<=5+2*layer+nz) continue;
3501 index[ncandidates] = i; //candidate to belong to delta electron track
3502 ncandidates++;
3503 if (cl0->GetNy()+cl0->GetNz()>9+2*layer+nz) {
3504 cl0->SetDeltaProbability(1);
3505 }
3506 }
3507 //
3508 //
3509 //
3510 for (Int_t i=0;i<ncandidates;i++){
00a7cc50 3511 AliITSRecPoint* cl0 = (AliITSRecPoint*)ClusterArray->At(index[i]);
e43c066c 3512 if (cl0->GetDeltaProbability()>0.8) continue;
3513 //
3514 Int_t ncl = 0;
3515 Float_t y[100],z[100],sumy,sumz,sumy2, sumyz, sumw;
3516 sumy=sumz=sumy2=sumyz=sumw=0.0;
3517 for (Int_t j=0;j<ncandidates;j++){
3518 if (i==j) continue;
00a7cc50 3519 AliITSRecPoint* cl1 = (AliITSRecPoint*)ClusterArray->At(index[j]);
e43c066c 3520 //
3521 Float_t dz = cl0->GetZ()-cl1->GetZ();
3522 Float_t dy = cl0->GetY()-cl1->GetY();
3523 if (TMath::Sqrt(dz*dz+dy*dy)<0.2){
3524 Float_t weight = cl1->GetNy()+cl1->GetNz()-2;
3525 y[ncl] = cl1->GetY();
3526 z[ncl] = cl1->GetZ();
3527 sumy+= y[ncl]*weight;
3528 sumz+= z[ncl]*weight;
3529 sumy2+=y[ncl]*y[ncl]*weight;
3530 sumyz+=y[ncl]*z[ncl]*weight;
3531 sumw+=weight;
3532 ncl++;
3533 }
3534 }
3535 if (ncl<4) continue;
3536 Float_t det = sumw*sumy2 - sumy*sumy;
3537 Float_t delta=1000;
3538 if (TMath::Abs(det)>0.01){
3539 Float_t z0 = (sumy2*sumz - sumy*sumyz)/det;
3540 Float_t k = (sumyz*sumw - sumy*sumz)/det;
3541 delta = TMath::Abs(cl0->GetZ()-(z0+k*cl0->GetY()));
3542 }
3543 else{
3544 Float_t z0 = sumyz/sumy;
3545 delta = TMath::Abs(cl0->GetZ()-z0);
3546 }
3547 if ( delta<0.05) {
3548 cl0->SetDeltaProbability(1-20.*delta);
3549 }
3550 }
3551}
44347160 3552//------------------------------------------------------------------------
15dd636f 3553void AliITStrackerMI::UpdateESDtrack(AliITStrackMI* track, ULong_t flags) const
e43c066c 3554{
3555 //
3556 //
3557 track->UpdateESDtrack(flags);
b9671574 3558 AliITStrackMI * oldtrack = (AliITStrackMI*)(track->GetESDtrack()->GetITStrack());
99c2ee26 3559 if (oldtrack) delete oldtrack;
b9671574 3560 track->GetESDtrack()->SetITStrack(new AliITStrackMI(*track));
3561 if (TMath::Abs(track->GetDnorm(1))<0.000000001){
628e7bb0 3562 printf("Problem\n");
3563 }
e43c066c 3564}
44347160 3565//------------------------------------------------------------------------
81e97e0d 3566Int_t AliITStrackerMI::GetNearestLayer(const Double_t *xr) const{
3567 //
3568 //Get nearest upper layer close to the point xr.
3569 // rough approximation
3570 //
bf6adc12 3571 const Float_t kRadiuses[6]={4,6.5,15.03,24.,38.5,43.7};
81e97e0d 3572 Float_t radius = TMath::Sqrt(xr[0]*xr[0]+xr[1]*xr[1]);
3573 Int_t res =6;
3574 for (Int_t i=0;i<6;i++){
bf6adc12 3575 if (radius<kRadiuses[i]){
81e97e0d 3576 res =i;
3577 break;
3578 }
3579 }
3580 return res;
3581}
44347160 3582//------------------------------------------------------------------------
af885e0f 3583void AliITStrackerMI::UpdateTPCV0(AliESDEvent *event){
81e97e0d 3584 //
3585 //try to update, or reject TPC V0s
3586 //
d6a49f20 3587 Int_t nv0s = event->GetNumberOfV0s();
81e97e0d 3588 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
51ad6848 3589
81e97e0d 3590 for (Int_t i=0;i<nv0s;i++){
d6a49f20 3591 AliESDv0 * vertex = event->GetV0(i);
81e97e0d 3592 Int_t ip = vertex->GetIndex(0);
3593 Int_t im = vertex->GetIndex(1);
3594 //
3595 TObjArray * arrayp = (ip<nitstracks) ? (TObjArray*)fTrackHypothesys.At(ip):0;
3596 TObjArray * arraym = (im<nitstracks) ? (TObjArray*)fTrackHypothesys.At(im):0;
3597 AliITStrackMI * trackp = (arrayp!=0) ? (AliITStrackMI*)arrayp->At(0):0;
3598 AliITStrackMI * trackm = (arraym!=0) ? (AliITStrackMI*)arraym->At(0):0;
3599 //
3600 //
3601 if (trackp){
b9671574 3602 if (trackp->GetNumberOfClusters()+trackp->GetNDeadZone()>5.5){
3603 if (trackp->GetConstrain()&&trackp->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3604 if (!trackp->GetConstrain()&&trackp->GetChi2MIP(0)<2) vertex->SetStatus(-100);
81e97e0d 3605 }
3606 }
51ad6848 3607
81e97e0d 3608 if (trackm){
b9671574 3609 if (trackm->GetNumberOfClusters()+trackm->GetNDeadZone()>5.5){
3610 if (trackm->GetConstrain()&&trackm->GetChi2MIP(0)<3) vertex->SetStatus(-100);
3611 if (!trackm->GetConstrain()&&trackm->GetChi2MIP(0)<2) vertex->SetStatus(-100);
81e97e0d 3612 }
3613 }
3614 if (vertex->GetStatus()==-100) continue;
3615 //
b75d63a7 3616 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
3617 Int_t clayer = GetNearestLayer(xrp); //I.B.
81e97e0d 3618 vertex->SetNBefore(clayer); //
3619 vertex->SetChi2Before(9*clayer); //
3620 vertex->SetNAfter(6-clayer); //
3621 vertex->SetChi2After(0); //
3622 //
3623 if (clayer >1 ){ // calculate chi2 before vertex
3624 Float_t chi2p = 0, chi2m=0;
3625 //
3626 if (trackp){
3627 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
b9671574 3628 if (trackp->GetClIndex(ilayer)>0){
3629 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3630 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
81e97e0d 3631 }
3632 else{
3633 chi2p+=9;
3634 }
3635 }
3636 }else{
3637 chi2p = 9*clayer;
3638 }
3639 //
3640 if (trackm){
3641 for (Int_t ilayer=0;ilayer<clayer;ilayer++){
b9671574 3642 if (trackm->GetClIndex(ilayer)>0){
3643 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3644 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
81e97e0d 3645 }
3646 else{
3647 chi2m+=9;
3648 }
3649 }
3650 }else{
3651 chi2m = 9*clayer;
3652 }
3653 vertex->SetChi2Before(TMath::Min(chi2p,chi2m));
3654 if (TMath::Min(chi2p,chi2m)/Float_t(clayer)<4) vertex->SetStatus(-10); // track exist before vertex
3655 }
3656
3657 if (clayer < 5 ){ // calculate chi2 after vertex
3658 Float_t chi2p = 0, chi2m=0;
3659 //
6c94f330 3660 if (trackp&&TMath::Abs(trackp->GetTgl())<1.){
81e97e0d 3661 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
b9671574 3662 if (trackp->GetClIndex(ilayer)>0){
3663 chi2p+=trackp->GetDy(ilayer)*trackp->GetDy(ilayer)/(trackp->GetSigmaY(ilayer)*trackp->GetSigmaY(ilayer))+
3664 trackp->GetDz(ilayer)*trackp->GetDz(ilayer)/(trackp->GetSigmaZ(ilayer)*trackp->GetSigmaZ(ilayer));
81e97e0d 3665 }
3666 else{
3667 chi2p+=9;
3668 }
3669 }
3670 }else{
3671 chi2p = 0;
3672 }
3673 //
6c94f330 3674 if (trackm&&TMath::Abs(trackm->GetTgl())<1.){
81e97e0d 3675 for (Int_t ilayer=clayer;ilayer<6;ilayer++){
b9671574 3676 if (trackm->GetClIndex(ilayer)>0){
3677 chi2m+=trackm->GetDy(ilayer)*trackm->GetDy(ilayer)/(trackm->GetSigmaY(ilayer)*trackm->GetSigmaY(ilayer))+
3678 trackm->GetDz(ilayer)*trackm->GetDz(ilayer)/(trackm->GetSigmaZ(ilayer)*trackm->GetSigmaZ(ilayer));
81e97e0d 3679 }
3680 else{
3681 chi2m+=9;
3682 }
3683 }
3684 }else{
3685 chi2m = 0;
3686 }
3687 vertex->SetChi2After(TMath::Max(chi2p,chi2m));
3688 if (TMath::Max(chi2m,chi2p)/Float_t(6-clayer)>9) vertex->SetStatus(-20); // track not found in ITS
3689 }
3690 }
3691 //
3692}
44347160 3693//------------------------------------------------------------------------
e50912db 3694void AliITStrackerMI::FindV02(AliESDEvent *event)
e43c066c 3695{
3696 //
81e97e0d 3697 // V0 finder
3698 //
3699 // Cuts on DCA - R dependent
3700 // max distance DCA between 2 tracks cut
3701 // maxDist = TMath::Min(kMaxDist,kMaxDist0+pvertex->GetRr()*kMaxDist);
3702 //
3703 const Float_t kMaxDist0 = 0.1;
3704 const Float_t kMaxDist1 = 0.1;
3705 const Float_t kMaxDist = 1;
3706 const Float_t kMinPointAngle = 0.85;
3707 const Float_t kMinPointAngle2 = 0.99;
3708 const Float_t kMinR = 0.5;
3709 const Float_t kMaxR = 220;
3710 //const Float_t kCausality0Cut = 0.19;
3711 //const Float_t kLikelihood01Cut = 0.25;
3712 //const Float_t kPointAngleCut = 0.9996;
3713 const Float_t kCausality0Cut = 0.19;
3714 const Float_t kLikelihood01Cut = 0.45;
3715 const Float_t kLikelihood1Cut = 0.5;
3716 const Float_t kCombinedCut = 0.55;
3717
3718 //
3719 //
3720 TTreeSRedirector &cstream = *fDebugStreamer;
3721 Int_t ntracks = event->GetNumberOfTracks();
3722 Int_t nitstracks = fTrackHypothesys.GetEntriesFast();
3723 fOriginal.Expand(ntracks);
3724 fTrackHypothesys.Expand(ntracks);
3725 fBestHypothesys.Expand(ntracks);
3726 //
3727 AliHelix * helixes = new AliHelix[ntracks+2];
3728 TObjArray trackarray(ntracks+2); //array with tracks - with vertex constrain
3729 TObjArray trackarrayc(ntracks+2); //array of "best tracks" - without vertex constrain
3730 TObjArray trackarrayl(ntracks+2); //array of "longest tracks" - without vertex constrain
3731 Bool_t * forbidden = new Bool_t [ntracks+2];
3732 Int_t *itsmap = new Int_t [ntracks+2];
3733 Float_t *dist = new Float_t[ntracks+2];
3734 Float_t *normdist0 = new Float_t[ntracks+2];
3735 Float_t *normdist1 = new Float_t[ntracks+2];
3736 Float_t *normdist = new Float_t[ntracks+2];
3737 Float_t *norm = new Float_t[ntracks+2];
3738 Float_t *maxr = new Float_t[ntracks+2];
3739 Float_t *minr = new Float_t[ntracks+2];
3740 Float_t *minPointAngle= new Float_t[ntracks+2];
3741 //
6c94f330 3742 AliV0 *pvertex = new AliV0;
81e97e0d 3743 AliITStrackMI * dummy= new AliITStrackMI;
3744 dummy->SetLabel(0);
3745 AliITStrackMI trackat0; //temporary track for DCA calculation
e43c066c 3746 //
81e97e0d 3747 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
628e7bb0 3748 //
afd25725 3749 // make ITS - ESD map
e43c066c 3750 //
81e97e0d 3751 for (Int_t itrack=0;itrack<ntracks+2;itrack++) {
3752 itsmap[itrack] = -1;
3753 forbidden[itrack] = kFALSE;
3754 maxr[itrack] = kMaxR;
3755 minr[itrack] = kMinR;
3756 minPointAngle[itrack] = kMinPointAngle;
3757 }
3758 for (Int_t itrack=0;itrack<nitstracks;itrack++){
3759 AliITStrackMI * original = (AliITStrackMI*)(fOriginal.At(itrack));
b9671574 3760 Int_t esdindex = original->GetESDtrack()->GetID();
81e97e0d 3761 itsmap[esdindex] = itrack;
3762 }
3763 //
afd25725 3764 // create ITS tracks from ESD tracks if not done before
81e97e0d 3765 //
3766 for (Int_t itrack=0;itrack<ntracks;itrack++){
3767 if (itsmap[itrack]>=0) continue;
3768 AliITStrackMI * tpctrack = new AliITStrackMI(*(event->GetTrack(itrack)));
791f9a2a 3769 //tpctrack->fD[0] = tpctrack->GetD(GetX(),GetY());
3770 //tpctrack->fD[1] = tpctrack->GetZat(GetX())-GetZ();
b9671574 3771 tpctrack->GetDZ(GetX(),GetY(),GetZ(),tpctrack->GetDP()); //I.B.
3772 if (tpctrack->GetD(0)<20 && tpctrack->GetD(1)<20){
81e97e0d 3773 // tracks which can reach inner part of ITS
3774 // propagate track to outer its volume - with correction for material
afd25725 3775 CorrectForTPCtoITSDeadZoneMaterial(tpctrack);
81e97e0d 3776 }
3777 itsmap[itrack] = nitstracks;
3778 fOriginal.AddAt(tpctrack,nitstracks);
3779 nitstracks++;
3780 }
3781 //
3782 // fill temporary arrays
3783 //
3784 for (Int_t itrack=0;itrack<ntracks;itrack++){
3785 AliESDtrack * esdtrack = event->GetTrack(itrack);
3786 Int_t itsindex = itsmap[itrack];
3787 AliITStrackMI *original = (AliITStrackMI*)fOriginal.At(itsmap[itrack]);
3788 if (!original) continue;
3789 AliITStrackMI *bestConst = 0;
3790 AliITStrackMI *bestLong = 0;
3791 AliITStrackMI *best = 0;
3792 //
628e7bb0 3793 //
81e97e0d 3794 TObjArray * array = (TObjArray*) fTrackHypothesys.At(itsindex);
3795 Int_t hentries = (array==0) ? 0 : array->GetEntriesFast();
3796 // Get best track with vertex constrain
628e7bb0 3797 for (Int_t ih=0;ih<hentries;ih++){
3798 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
b9671574 3799 if (!trackh->GetConstrain()) continue;
81e97e0d 3800 if (!bestConst) bestConst = trackh;
b9671574 3801 if (trackh->GetNumberOfClusters()>5.0){
81e97e0d 3802 bestConst = trackh; // full track - with minimal chi2
3803 break;
3804 }
b9671574 3805 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()) continue;
81e97e0d 3806 bestConst = trackh;
628e7bb0 3807 break;
81e97e0d 3808 }
3809 // Get best long track without vertex constrain and best track without vertex constrain
628e7bb0 3810 for (Int_t ih=0;ih<hentries;ih++){
3811 AliITStrackMI * trackh = (AliITStrackMI*)array->At(ih);
b9671574 3812 if (trackh->GetConstrain()) continue;
81e97e0d 3813 if (!best) best = trackh;
3814 if (!bestLong) bestLong = trackh;
b9671574 3815 if (trackh->GetNumberOfClusters()>5.0){
81e97e0d 3816 bestLong = trackh; // full track - with minimal chi2
3817 break;
3818 }
b9671574 3819 if (trackh->GetNumberOfClusters()+trackh->GetNDeadZone()<=bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()) continue;
81e97e0d 3820 bestLong = trackh;
628e7bb0 3821 }
81e97e0d 3822 if (!best) {
3823 best = original;
3824 bestLong = original;
628e7bb0 3825 }
6c94f330 3826 //I.B. trackat0 = *bestLong;
420c3064 3827 new (&trackat0) AliITStrackMI(*bestLong);
81e97e0d 3828 Double_t xx,yy,zz,alpha;
3829 bestLong->GetGlobalXYZat(bestLong->GetX(),xx,yy,zz);
3830 alpha = TMath::ATan2(yy,xx);
3831 trackat0.Propagate(alpha,0);
3832 // calculate normalized distances to the vertex
628e7bb0 3833 //
6c94f330 3834 Float_t ptfac = (1.+100.*TMath::Abs(trackat0.GetC()));
b9671574 3835 if ( bestLong->GetNumberOfClusters()>3 ){
6c94f330 3836 dist[itsindex] = trackat0.GetY();
3837 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3838 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3839 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
81e97e0d 3840 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
29641977 3841 if (!bestConst){
b9671574 3842 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<6) normdist[itsindex]*=2.;
3843 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<5) normdist[itsindex]*=2.;
3844 if (bestLong->GetNumberOfClusters()+bestLong->GetNDeadZone()<4) normdist[itsindex]*=2.;
29641977 3845 }else{
b9671574 3846 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<6) normdist[itsindex]*=1.5;
3847 if (bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()<5) normdist[itsindex]*=1.5;
29641977 3848 }
81e97e0d 3849 }
3850 else{
b9671574 3851 if (bestConst&&bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5){
3852 dist[itsindex] = bestConst->GetD(0);
3853 norm[itsindex] = bestConst->GetDnorm(0);
3854 normdist0[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
3855 normdist1[itsindex] = TMath::Abs(bestConst->GetD(0)/norm[itsindex]);
81e97e0d 3856 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
3857 }else{
6c94f330 3858 dist[itsindex] = trackat0.GetY();
3859 norm[itsindex] = ptfac*TMath::Sqrt(trackat0.GetSigmaY2());
3860 normdist0[itsindex] = TMath::Abs(trackat0.GetY()/norm[itsindex]);
3861 normdist1[itsindex] = TMath::Abs((trackat0.GetZ()-primvertex[2])/(ptfac*TMath::Sqrt(trackat0.GetSigmaZ2())));
81e97e0d 3862 normdist[itsindex] = TMath::Sqrt(normdist0[itsindex]*normdist0[itsindex]+normdist1[itsindex]*normdist1[itsindex]);
6c94f330 3863 if (TMath::Abs(trackat0.GetTgl())>1.05){
67c1e979 3864 if (normdist[itsindex]<3) forbidden[itsindex]=kTRUE;
3865 if (normdist[itsindex]>3) {
3866 minr[itsindex] = TMath::Max(Float_t(40.),minr[itsindex]);
3867 }
81e97e0d 3868 }
3869 }
3870 }
628e7bb0 3871 //
81e97e0d 3872 //-----------------------------------------------------------
3873 //Forbid primary track candidates -
628e7bb0 3874 //
81e97e0d 3875 //treetr->SetAlias("forbidden0","Tr0.fN<4&&Tr1.fN+Tr1.fNDeadZone>4.5");
3876 //treetr->SetAlias("forbidden1","ND<3&&Tr1.fN+Tr1.fNDeadZone>5.5");
3877 //treetr->SetAlias("forbidden2","ND<2&&Tr1.fClIndex[0]>0&&Tr1.fClIndex[0]>0");
3878 //treetr->SetAlias("forbidden3","ND<1&&Tr1.fClIndex[0]>0");
3879 //treetr->SetAlias("forbidden4","ND<4&&Tr1.fNormChi2[0]<2");
3880 //treetr->SetAlias("forbidden5","ND<5&&Tr1.fNormChi2[0]<1");
3881 //-----------------------------------------------------------
3882 if (bestConst){
b9671574 3883 if (bestLong->GetNumberOfClusters()<4 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>4.5) forbidden[itsindex]=kTRUE;
3884 if (normdist[itsindex]<3 && bestConst->GetNumberOfClusters()+bestConst->GetNDeadZone()>5.5) forbidden[itsindex]=kTRUE;
3885 if (normdist[itsindex]<2 && bestConst->GetClIndex(0)>0 && bestConst->GetClIndex(1)>0 ) forbidden[itsindex]=kTRUE;
3886 if (normdist[itsindex]<1 && bestConst->GetClIndex(0)>0) forbidden[itsindex]=kTRUE;
3887 if (normdist[itsindex]<4 && bestConst->GetNormChi2(0)<2) forbidden[itsindex]=kTRUE;
3888 if (normdist[itsindex]<5 && bestConst->GetNormChi2(0)<1) forbidden[itsindex]=kTRUE;
3889 if (bestConst->GetNormChi2(0)<2.5) {
81e97e0d 3890 minPointAngle[itsindex]= 0.9999;
3891 maxr[itsindex] = 10;
628e7bb0 3892 }
e43c066c 3893 }
81e97e0d 3894 //
3895 //forbid daughter kink candidates
3896 //
3897 if (esdtrack->GetKinkIndex(0)>0) forbidden[itsindex] = kTRUE;
3898 Bool_t isElectron = kTRUE;
29641977 3899 Bool_t isProton = kTRUE;
81e97e0d 3900 Double_t pid[5];
3901 esdtrack->GetESDpid(pid);
3902 for (Int_t i=1;i<5;i++){
3903 if (pid[0]<pid[i]) isElectron= kFALSE;
29641977 3904 if (pid[4]<pid[i]) isProton= kFALSE;
81e97e0d 3905 }
3906 if (isElectron){
3907 forbidden[itsindex]=kFALSE;
29641977 3908 normdist[itsindex]*=-1;
3909 }
3910 if (isProton){
3911 if (normdist[itsindex]>2) forbidden[itsindex]=kFALSE;
3912 normdist[itsindex]*=-1;
81e97e0d 3913 }
29641977 3914
81e97e0d 3915 //
3916 // Causality cuts in TPC volume
3917 //
3918 if (esdtrack->GetTPCdensity(0,10) >0.6) maxr[itsindex] = TMath::Min(Float_t(110),maxr[itsindex]);
3919 if (esdtrack->GetTPCdensity(10,30)>0.6) maxr[itsindex] = TMath::Min(Float_t(120),maxr[itsindex]);
3920 if (esdtrack->GetTPCdensity(20,40)>0.6) maxr[itsindex] = TMath::Min(Float_t(130),maxr[itsindex]);
3921 if (esdtrack->GetTPCdensity(30,50)>0.6) maxr[itsindex] = TMath::Min(Float_t(140),maxr[itsindex]);
3922 //
b9671574 3923 if (esdtrack->GetTPCdensity(0,60)<0.4&&bestLong->GetNumberOfClusters()<3) minr[itsindex]=100;
81e97e0d 3924 //
3925 //
29641977 3926 if (kFALSE){
81e97e0d 3927 cstream<<"Track"<<
3928 "Tr0.="<<best<<
3929 "Tr1.="<<((bestConst)? bestConst:dummy)<<
3930 "Tr2.="<<bestLong<<
3931 "Tr3.="<<&trackat0<<
3932 "Esd.="<<esdtrack<<
3933 "Dist="<<dist[itsindex]<<
3934 "ND0="<<normdist0[itsindex]<<
3935 "ND1="<<normdist1[itsindex]<<
3936 "ND="<<normdist[itsindex]<<
3937 "Pz="<<primvertex[2]<<
3938 "Forbid="<<forbidden[itsindex]<<
3939 "\n";
3940 //
3941 }
3942 trackarray.AddAt(best,itsindex);
3943 trackarrayc.AddAt(bestConst,itsindex);
3944 trackarrayl.AddAt(bestLong,itsindex);
3945 new (&helixes[itsindex]) AliHelix(*best);
e43c066c 3946 }
628e7bb0 3947 //
3948 //
81e97e0d 3949 //
3950 // first iterration of V0 finder
3951 //
3952 for (Int_t iesd0=0;iesd0<ntracks;iesd0++){
3953 Int_t itrack0 = itsmap[iesd0];
3954 if (forbidden[itrack0]) continue;
3955 AliITStrackMI * btrack0 = (AliITStrackMI*)trackarray.At(itrack0);
3956 if (!btrack0) continue;
420c3064 3957 if (btrack0->GetSign()>0) continue;
628e7bb0 3958 AliITStrackMI *trackc0 = (AliITStrackMI*)trackarrayc.At(itrack0);
3959 //
81e97e0d 3960 for (Int_t iesd1=0;iesd1<ntracks;iesd1++){
3961 Int_t itrack1 = itsmap[iesd1];
3962 if (forbidden[itrack1]) continue;
3963
3964 AliITStrackMI * btrack1 = (AliITStrackMI*)trackarray.At(itrack1);
3965 if (!btrack1) continue;
420c3064 3966 if (btrack1->GetSign()<0) continue;
81e97e0d 3967 Bool_t isGold = kFALSE;
3968 if (TMath::Abs(TMath::Abs(btrack0->GetLabel())-TMath::Abs(btrack1->GetLabel()))==1){
3969 isGold = kTRUE;
628e7bb0 3970 }
81e97e0d 3971 AliITStrackMI *trackc1 = (AliITStrackMI*)trackarrayc.At(itrack1);
3972 AliHelix &h1 = helixes[itrack0];
3973 AliHelix &h2 = helixes[itrack1];
628e7bb0 3974 //
81e97e0d 3975 // find linear distance
3976 Double_t rmin =0;
628e7bb0 3977 //
51ad6848 3978 //
51ad6848 3979 //
81e97e0d 3980 Double_t phase[2][2],radius[2];
3981 Int_t points = h1.GetRPHIintersections(h2, phase, radius);
3982 if (points==0) continue;
c49fe0bf 3983 Double_t delta[2]={1000000,1000000};
81e97e0d 3984 rmin = radius[0];
3985 h1.ParabolicDCA(h2,phase[0][0],phase[0][1],radius[0],delta[0]);
3986 if (points==2){
3987 if (radius[1]<rmin) rmin = radius[1];
3988 h1.ParabolicDCA(h2,phase[1][0],phase[1][1],radius[1],delta[1]);
3989 }
3990 rmin = TMath::Sqrt(rmin);
3991 Double_t distance = 0;
3992 Double_t radiusC = 0;
3993 Int_t iphase = 0;
c49fe0bf 3994 if (points==1 || delta[0]<delta[1]){
81e97e0d 3995 distance = TMath::Sqrt(delta[0]);
3996 radiusC = TMath::Sqrt(radius[0]);
3997 }else{
3998 distance = TMath::Sqrt(delta[1]);
3999 radiusC = TMath::Sqrt(radius[1]);
4000 iphase=1;
4001 }
4002 if (radiusC<TMath::Max(minr[itrack0],minr[itrack1])) continue;
4003 if (radiusC>TMath::Min(maxr[itrack0],maxr[itrack1])) continue;
4004 Float_t maxDist = TMath::Min(kMaxDist,Float_t(kMaxDist0+radiusC*kMaxDist1));
4005 if (distance>maxDist) continue;
4006 Float_t pointAngle = h1.GetPointAngle(h2,phase[iphase],primvertex);
4007 if (pointAngle<TMath::Max(minPointAngle[itrack0],minPointAngle[itrack1])) continue;
628e7bb0 4008 //
51ad6848 4009 //
81e97e0d 4010 // Double_t distance = TestV0(h1,h2,pvertex,rmin);
51ad6848 4011 //
81e97e0d 4012 // if (distance>maxDist) continue;
4013 // if (pvertex->GetRr()<kMinR) continue;
4014 // if (pvertex->GetRr()>kMaxR) continue;
4015 AliITStrackMI * track0=btrack0;
4016 AliITStrackMI * track1=btrack1;
4017 // if (pvertex->GetRr()<3.5){
4018 if (radiusC<3.5){
4019 //use longest tracks inside the pipe
4020 track0 = (AliITStrackMI*)trackarrayl.At(itrack0);
4021 track1 = (AliITStrackMI*)trackarrayl.At(itrack1);
4022 }
51ad6848 4023 //
4024 //
b75d63a7 4025 pvertex->SetParamN(*track0);
4026 pvertex->SetParamP(*track1);
81e97e0d 4027 pvertex->Update(primvertex);
b9671574 4028 pvertex->SetClusters(track0->ClIndex(),track1->ClIndex()); // register clusters
67c1e979 4029
81e97e0d 4030 if (pvertex->GetRr()<kMinR) continue;
4031 if (pvertex->GetRr()>kMaxR) continue;
b75d63a7 4032 if (pvertex->GetV0CosineOfPointingAngle()<kMinPointAngle) continue;
4033//Bo: if (pvertex->GetDist2()>maxDist) continue;
4034 if (pvertex->GetDcaV0Daughters()>maxDist) continue;
4035//Bo: pvertex->SetLab(0,track0->GetLabel());
4036//Bo: pvertex->SetLab(1,track1->GetLabel());
b9671574 4037 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4038 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
81e97e0d 4039 //
4040 AliITStrackMI * htrackc0 = trackc0 ? trackc0:dummy;
4041 AliITStrackMI * htrackc1 = trackc1 ? trackc1:dummy;
51ad6848 4042
81e97e0d 4043 //
4044 //
4045 TObjArray * array0b = (TObjArray*)fBestHypothesys.At(itrack0);
6c94f330 4046 if (!array0b&&pvertex->GetRr()<40 && TMath::Abs(track0->GetTgl())<1.1)
81e97e0d 4047 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack0),itrack0, kFALSE);
4048 TObjArray * array1b = (TObjArray*)fBestHypothesys.At(itrack1);
6c94f330 4049 if (!array1b&&pvertex->GetRr()<40 && TMath::Abs(track1->GetTgl())<1.1)
81e97e0d 4050 FollowProlongationTree((AliITStrackMI*)fOriginal.At(itrack1),itrack1, kFALSE);
4051 //
4052 AliITStrackMI * track0b = (AliITStrackMI*)fOriginal.At(itrack0);
4053 AliITStrackMI * track1b = (AliITStrackMI*)fOriginal.At(itrack1);
4054 AliITStrackMI * track0l = (AliITStrackMI*)fOriginal.At(itrack0);
4055 AliITStrackMI * track1l = (AliITStrackMI*)fOriginal.At(itrack1);
4056
4057 Float_t minchi2before0=16;
4058 Float_t minchi2before1=16;
4059 Float_t minchi2after0 =16;
4060 Float_t minchi2after1 =16;
b75d63a7 4061 Double_t xrp[3]; pvertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
4062 Int_t maxLayer = GetNearestLayer(xrp); //I.B.
81e97e0d 4063
4064 if (array0b) for (Int_t i=0;i<5;i++){
4065 // best track after vertex
4066 AliITStrackMI * btrack = (AliITStrackMI*)array0b->At(i);
4067 if (!btrack) continue;
b9671574 4068 if (btrack->GetNumberOfClusters()>track0l->GetNumberOfClusters()) track0l = btrack;
29641977 4069 // if (btrack->fX<pvertex->GetRr()-2.-0.5/(0.1+pvertex->GetAnglep()[2])) {
6c94f330 4070 if (btrack->GetX()<pvertex->GetRr()-2.) {
b9671574 4071 if ( (maxLayer>i+2|| (i==0)) && btrack->GetNumberOfClusters()==(6-i)&&i<3){
81e97e0d 4072 Float_t sumchi2= 0;
4073 Float_t sumn = 0;
29641977 4074 if (maxLayer<3){ // take prim vertex as additional measurement
4075 if (normdist[itrack0]>0 && htrackc0){
97f754fa 4076 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack0]*normdist[itrack0],16.);
29641977 4077 }else{
97f754fa 4078 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack0]*normdist[itrack0]+3.),16.);
29641977 4079 }
4080 sumn += 3-maxLayer;
4081 }
81e97e0d 4082 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
97f754fa 4083 sumn+=1.;
b9671574 4084 if (!btrack->GetClIndex(ilayer)){
81e97e0d 4085 sumchi2+=25;
4086 continue;
4087 }else{
b9671574 4088 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
97f754fa 4089 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 4090 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack0){
97f754fa 4091 sumchi2+=18.; //shared cluster
4092 break;
4093 }
4094 }
b9671574 4095 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4096 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
81e97e0d 4097 }
4098 }
4099 sumchi2/=sumn;
4100 if (sumchi2<minchi2before0) minchi2before0=sumchi2;
51ad6848 4101 }
81e97e0d 4102 continue; //safety space - Geo manager will give exact layer
51ad6848 4103 }
81e97e0d 4104 track0b = btrack;
b9671574 4105 minchi2after0 = btrack->GetNormChi2(i);
81e97e0d 4106 break;
4107 }
4108 if (array1b) for (Int_t i=0;i<5;i++){
4109 // best track after vertex
4110 AliITStrackMI * btrack = (AliITStrackMI*)array1b->At(i);
4111 if (!btrack) continue;
b9671574 4112 if (btrack->GetNumberOfClusters()>track1l->GetNumberOfClusters()) track1l = btrack;
29641977 4113 // if (btrack->fX<pvertex->GetRr()-2-0.5/(0.1+pvertex->GetAnglep()[2])){
6c94f330 4114 if (btrack->GetX()<pvertex->GetRr()-2){
b9671574 4115 if ((maxLayer>i+2 || (i==0))&&btrack->GetNumberOfClusters()==(6-i)&&(i<3)){
81e97e0d 4116 Float_t sumchi2= 0;
4117 Float_t sumn = 0;
29641977 4118 if (maxLayer<3){ // take prim vertex as additional measurement
4119 if (normdist[itrack1]>0 && htrackc1){
97f754fa 4120 sumchi2 += TMath::Min((3.-maxLayer)*normdist[itrack1]*normdist[itrack1],16.);
29641977 4121 }else{
97f754fa 4122 sumchi2 += TMath::Min((3.-maxLayer)*(3*normdist[itrack1]*normdist[itrack1]+3.),16.);
29641977 4123 }
4124 sumn += 3-maxLayer;
4125 }
81e97e0d 4126 for (Int_t ilayer=i;ilayer<maxLayer;ilayer++){
4127 sumn+=1.;
b9671574 4128 if (!btrack->GetClIndex(ilayer)){
81e97e0d 4129 sumchi2+=30;
4130 continue;
4131 }else{
b9671574 4132 Int_t c=( btrack->GetClIndex(ilayer) & 0x0fffffff);
97f754fa 4133 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 4134 if (fgLayers[ilayer].GetClusterTracks(itrack,c)>=0 && fgLayers[ilayer].GetClusterTracks(itrack,c)!=itrack1){
97f754fa 4135 sumchi2+=18.; //shared cluster
4136 break;
4137 }
4138 }
b9671574 4139 sumchi2+=btrack->GetDy(ilayer)*btrack->GetDy(ilayer)/(btrack->GetSigmaY(ilayer)*btrack->GetSigmaY(ilayer));
4140 sumchi2+=btrack->GetDz(ilayer)*btrack->GetDz(ilayer)/(btrack->GetSigmaZ(ilayer)*btrack->GetSigmaZ(ilayer));
81e97e0d 4141 }
4142 }
4143 sumchi2/=sumn;
4144 if (sumchi2<minchi2before1) minchi2before1=sumchi2;
51ad6848 4145 }
81e97e0d 4146 continue; //safety space - Geo manager will give exact layer
51ad6848 4147 }
81e97e0d 4148 track1b = btrack;
b9671574 4149 minchi2after1 = btrack->GetNormChi2(i);
81e97e0d 4150 break;
e43c066c 4151 }
628e7bb0 4152 //
81e97e0d 4153 // position resolution - used for DCA cut
6c94f330 4154 Float_t sigmad = track0b->GetSigmaY2()+track0b->GetSigmaZ2()+track1b->GetSigmaY2()+track1b->GetSigmaZ2()+
4155 (track0b->GetX()-pvertex->GetRr())*(track0b->GetX()-pvertex->GetRr())*(track0b->GetSigmaSnp2()+track0b->GetSigmaTgl2())+
4156 (track1b->GetX()-pvertex->GetRr())*(track1b->GetX()-pvertex->GetRr())*(track1b->GetSigmaSnp2()+track1b->GetSigmaTgl2());
81e97e0d 4157 sigmad =TMath::Sqrt(sigmad)+0.04;
4158 if (pvertex->GetRr()>50){
4159 Double_t cov0[15],cov1[15];
b9671574 4160 track0b->GetESDtrack()->GetInnerExternalCovariance(cov0);
4161 track1b->GetESDtrack()->GetInnerExternalCovariance(cov1);
81e97e0d 4162 sigmad = cov0[0]+cov0[2]+cov1[0]+cov1[2]+
4163 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov0[5]+cov0[9])+
4164 (80.-pvertex->GetRr())*(80.-pvertex->GetRr())*(cov1[5]+cov1[9]);
4165 sigmad =TMath::Sqrt(sigmad)+0.05;
4166 }
4167 //
6c94f330 4168 AliV0 vertex2;
b75d63a7 4169 vertex2.SetParamN(*track0b);
4170 vertex2.SetParamP(*track1b);
81e97e0d 4171 vertex2.Update(primvertex);
b75d63a7 4172 //Bo: if (vertex2.GetDist2()<=pvertex->GetDist2()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4173 if (vertex2.GetDcaV0Daughters()<=pvertex->GetDcaV0Daughters()&&(vertex2.GetV0CosineOfPointingAngle()>=pvertex->GetV0CosineOfPointingAngle())){
4174 pvertex->SetParamN(*track0b);
4175 pvertex->SetParamP(*track1b);
81e97e0d 4176 pvertex->Update(primvertex);
b9671574 4177 pvertex->SetClusters(track0b->ClIndex(),track1b->ClIndex()); // register clusters
4178 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());
4179 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());
81e97e0d 4180 }
4181 pvertex->SetDistSigma(sigmad);
b75d63a7 4182 //Bo: pvertex->SetDistNorm(pvertex->GetDist2()/sigmad);
29641977 4183 pvertex->SetNormDCAPrim(normdist[itrack0],normdist[itrack1]);
628e7bb0 4184 //
81e97e0d 4185 // define likelihhod and causalities
628e7bb0 4186 //
81e97e0d 4187 Float_t pa0=1, pa1=1, pb0=0.26, pb1=0.26;
29641977 4188 if (maxLayer<1){
4189 Float_t fnorm0 = normdist[itrack0];
4190 if (fnorm0<0) fnorm0*=-3;
4191 Float_t fnorm1 = normdist[itrack1];
4192 if (fnorm1<0) fnorm1*=-3;
4193 if (pvertex->GetAnglep()[2]>0.1 || (pvertex->GetRr()<10.5)&& pvertex->GetAnglep()[2]>0.05 || pvertex->GetRr()<3){
4194 pb0 = TMath::Exp(-TMath::Min(fnorm0,Float_t(16.))/12.);
4195 pb1 = TMath::Exp(-TMath::Min(fnorm1,Float_t(16.))/12.);
67c1e979 4196 }
81e97e0d 4197 pvertex->SetChi2Before(normdist[itrack0]);
4198 pvertex->SetChi2After(normdist[itrack1]);
4199 pvertex->SetNAfter(0);
4200 pvertex->SetNBefore(0);
4201 }else{
4202 pvertex->SetChi2Before(minchi2before0);
4203 pvertex->SetChi2After(minchi2before1);
29641977 4204 if (pvertex->GetAnglep()[2]>0.1 || ( pvertex->GetRr()<10.5 && pvertex->GetAnglep()[2]>0.05) || pvertex->GetRr()<3){
4205 pb0 = TMath::Exp(-TMath::Min(minchi2before0,Float_t(16))/12.);
4206 pb1 = TMath::Exp(-TMath::Min(minchi2before1,Float_t(16))/12.);
4207 }
4208 pvertex->SetNAfter(maxLayer);
4209 pvertex->SetNBefore(maxLayer);
628e7bb0 4210 }
81e97e0d 4211 if (pvertex->GetRr()<90){
f941f7fa 4212 pa0 *= TMath::Min(track0->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
4213 pa1 *= TMath::Min(track1->GetESDtrack()->GetTPCdensity(0,60),Double_t(1.));
628e7bb0 4214 }
81e97e0d 4215 if (pvertex->GetRr()<20){
4216 pa0 *= (0.2+TMath::Exp(-TMath::Min(minchi2after0,Float_t(16))/8.))/1.2;
4217 pa1 *= (0.2+TMath::Exp(-TMath::Min(minchi2after1,Float_t(16))/8.))/1.2;
e43c066c 4218 }
628e7bb0 4219 //
81e97e0d 4220 pvertex->SetCausality(pb0,pb1,pa0,pa1);
628e7bb0 4221 //
81e97e0d 4222 // Likelihood calculations - apply cuts
4223 //
4224 Bool_t v0OK = kTRUE;
4225 Float_t p12 = pvertex->GetParamP()->GetParameter()[4]*pvertex->GetParamP()->GetParameter()[4];
b75d63a7 4226 p12 += pvertex->GetParamN()->GetParameter()[4]*pvertex->GetParamN()->GetParameter()[4];
81e97e0d 4227 p12 = TMath::Sqrt(p12); // "mean" momenta
4228 Float_t sigmap0 = 0.0001+0.001/(0.1+pvertex->GetRr());
4229 Float_t sigmap = 0.5*sigmap0*(0.6+0.4*p12); // "resolution: of point angle - as a function of radius and momenta
4230
bf6adc12 4231 Float_t causalityA = (1.0-pvertex->GetCausalityP()[0])*(1.0-pvertex->GetCausalityP()[1]);
f941f7fa 4232 Float_t causalityB = TMath::Sqrt(TMath::Min(pvertex->GetCausalityP()[2],Double_t(0.7))*
4233 TMath::Min(pvertex->GetCausalityP()[3],Double_t(0.7)));
628e7bb0 4234 //
b75d63a7 4235 //Bo: Float_t likelihood0 = (TMath::Exp(-pvertex->GetDistNorm())+0.1) *(pvertex->GetDist2()<0.5)*(pvertex->GetDistNorm()<5);
4236 Float_t lDistNorm = pvertex->GetDcaV0Daughters()/pvertex->GetDistSigma();
4237 Float_t likelihood0 = (TMath::Exp(-lDistNorm)+0.1) *(pvertex->GetDcaV0Daughters()<0.5)*(lDistNorm<5);
4238
4239 Float_t likelihood1 = TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/sigmap)+
4240 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(4.*sigmap))+
4241 0.4*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/(8.*sigmap))+
4242 0.1*TMath::Exp(-(1.0001-pvertex->GetV0CosineOfPointingAngle())/0.01);
628e7bb0 4243 //
bf6adc12 4244 if (causalityA<kCausality0Cut) v0OK = kFALSE;
4245 if (TMath::Sqrt(likelihood0*likelihood1)<kLikelihood01Cut) v0OK = kFALSE;
4246 if (likelihood1<kLikelihood1Cut) v0OK = kFALSE;
4247 if (TMath::Power(likelihood0*likelihood1*causalityB,0.33)<kCombinedCut) v0OK = kFALSE;
81e97e0d 4248
628e7bb0 4249 //
628e7bb0 4250 //
67c1e979 4251 if (kFALSE){
81e97e0d 4252 Bool_t gold = TMath::Abs(TMath::Abs(track0->GetLabel())-TMath::Abs(track1->GetLabel()))==1;
4253 cstream<<"It0"<<
4254 "Tr0.="<<track0<< //best without constrain
4255 "Tr1.="<<track1<< //best without constrain
4256 "Tr0B.="<<track0b<< //best without constrain after vertex
4257 "Tr1B.="<<track1b<< //best without constrain after vertex
4258 "Tr0C.="<<htrackc0<< //best with constrain if exist
4259 "Tr1C.="<<htrackc1<< //best with constrain if exist
4260 "Tr0L.="<<track0l<< //longest best
4261 "Tr1L.="<<track1l<< //longest best
b9671574 4262 "Esd0.="<<track0->GetESDtrack()<< // esd track0 params
4263 "Esd1.="<<track1->GetESDtrack()<< // esd track1 params
81e97e0d 4264 "V0.="<<pvertex<< //vertex properties
4265 "V0b.="<<&vertex2<< //vertex properties at "best" track
4266 "ND0="<<normdist[itrack0]<< //normalize distance for track0
4267 "ND1="<<normdist[itrack1]<< //normalize distance for track1
4268 "Gold="<<gold<< //
4269 // "RejectBase="<<rejectBase<< //rejection in First itteration
4270 "OK="<<v0OK<<
4271 "rmin="<<rmin<<
4272 "sigmad="<<sigmad<<
4273 "\n";
4274 }
4275 //if (rejectBase) continue;
628e7bb0 4276 //
81e97e0d 4277 pvertex->SetStatus(0);
4278 // if (rejectBase) {
4279 // pvertex->SetStatus(-100);
4280 //}
b75d63a7 4281 if (pvertex->GetV0CosineOfPointingAngle()>kMinPointAngle2) {
4282 //Bo: pvertex->SetESDindexes(track0->GetESDtrack()->GetID(),track1->GetESDtrack()->GetID());
4283 pvertex->SetIndex(0,track0->GetESDtrack()->GetID());//Bo: consistency 0 for neg
4284 pvertex->SetIndex(1,track1->GetESDtrack()->GetID());//Bo: consistency 1 for pos
67c1e979 4285 if (v0OK){
4286 // AliV0vertex vertexjuri(*track0,*track1);
4287 // vertexjuri.SetESDindexes(track0->fESDtrack->GetID(),track1->fESDtrack->GetID());
4288 // event->AddV0(&vertexjuri);
81e97e0d 4289 pvertex->SetStatus(100);
4290 }
d6a49f20 4291 pvertex->SetOnFlyStatus(kTRUE);
b75d63a7 4292 pvertex->ChangeMassHypothesis(kK0Short);
d6a49f20 4293 event->AddV0(pvertex);
628e7bb0 4294 }
51ad6848 4295 }
4296 }
628e7bb0 4297 //
4298 //
81e97e0d 4299 // delete temporary arrays
4300 //
316c6cd9 4301 delete[] forbidden;
81e97e0d 4302 delete[] minPointAngle;
4303 delete[] maxr;
4304 delete[] minr;
4305 delete[] norm;
4306 delete[] normdist;
4307 delete[] normdist1;
4308 delete[] normdist0;
4309 delete[] dist;
4310 delete[] itsmap;
4311 delete[] helixes;
4312 delete pvertex;
e43c066c 4313}
44347160 4314//------------------------------------------------------------------------
af885e0f 4315void AliITStrackerMI::RefitV02(AliESDEvent *event)
67c1e979 4316{
4317 //
4318 //try to refit V0s in the third path of the reconstruction
4319 //
4320 TTreeSRedirector &cstream = *fDebugStreamer;
4321 //
d6a49f20 4322 Int_t nv0s = event->GetNumberOfV0s();
67c1e979 4323 Float_t primvertex[3]={GetX(),GetY(),GetZ()};
6c94f330 4324 AliV0 v0temp;
67c1e979 4325 for (Int_t iv0 = 0; iv0<nv0s;iv0++){
d6a49f20 4326 AliV0 * v0mi = (AliV0*)event->GetV0(iv0);
67c1e979 4327 if (!v0mi) continue;
4328 Int_t itrack0 = v0mi->GetIndex(0);
4329 Int_t itrack1 = v0mi->GetIndex(1);
4330 AliESDtrack *esd0 = event->GetTrack(itrack0);
4331 AliESDtrack *esd1 = event->GetTrack(itrack1);
4332 if (!esd0||!esd1) continue;
4333 AliITStrackMI tpc0(*esd0);
4334 AliITStrackMI tpc1(*esd1);
b75d63a7 4335 Double_t x,y,z; v0mi->GetXYZ(x,y,z); //I.B.
4336 Double_t alpha =TMath::ATan2(y,x); //I.B.
67c1e979 4337 if (v0mi->GetRr()>85){
4338 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
b75d63a7 4339 v0temp.SetParamN(tpc0);
4340 v0temp.SetParamP(tpc1);
67c1e979 4341 v0temp.Update(primvertex);
29641977 4342 if (kFALSE) cstream<<"Refit"<<
67c1e979 4343 "V0.="<<v0mi<<
4344 "V0refit.="<<&v0temp<<
4345 "Tr0.="<<&tpc0<<
4346 "Tr1.="<<&tpc1<<
4347 "\n";
b75d63a7 4348 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4349 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4350 v0mi->SetParamN(tpc0);
4351 v0mi->SetParamP(tpc1);
67c1e979 4352 v0mi->Update(primvertex);
4353 }
4354 }
4355 continue;
4356 }
4357 if (v0mi->GetRr()>35){
afd25725 4358 CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
4359 CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
67c1e979 4360 if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
b75d63a7 4361 v0temp.SetParamN(tpc0);
4362 v0temp.SetParamP(tpc1);
67c1e979 4363 v0temp.Update(primvertex);
29641977 4364 if (kFALSE) cstream<<"Refit"<<
67c1e979 4365 "V0.="<<v0mi<<
4366 "V0refit.="<<&v0temp<<
4367 "Tr0.="<<&tpc0<<
4368 "Tr1.="<<&tpc1<<
4369 "\n";
b75d63a7 4370 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4371 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4372 v0mi->SetParamN(tpc0);
4373 v0mi->SetParamP(tpc1);
67c1e979 4374 v0mi->Update(primvertex);
4375 }
4376 }
4377 continue;
4378 }
afd25725 4379 CorrectForTPCtoITSDeadZoneMaterial(&tpc0);
4380 CorrectForTPCtoITSDeadZoneMaterial(&tpc1);
67c1e979 4381 // if (tpc0.Propagate(alpha,v0mi->GetRr())&&tpc1.Propagate(alpha,v0mi->GetRr())){
4382 if (RefitAt(v0mi->GetRr(),&tpc0, v0mi->GetClusters(0)) && RefitAt(v0mi->GetRr(),&tpc1, v0mi->GetClusters(1))){
b75d63a7 4383 v0temp.SetParamN(tpc0);
4384 v0temp.SetParamP(tpc1);
67c1e979 4385 v0temp.Update(primvertex);
29641977 4386 if (kFALSE) cstream<<"Refit"<<
67c1e979 4387 "V0.="<<v0mi<<
4388 "V0refit.="<<&v0temp<<
4389 "Tr0.="<<&tpc0<<
4390 "Tr1.="<<&tpc1<<
4391 "\n";
b75d63a7 4392 //Bo: if (v0temp.GetDist2()<v0mi->GetDist2() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4393 if (v0temp.GetDcaV0Daughters()<v0mi->GetDcaV0Daughters() || v0temp.GetV0CosineOfPointingAngle()>v0mi->GetV0CosineOfPointingAngle()){
4394 v0mi->SetParamN(tpc0);
4395 v0mi->SetParamP(tpc1);
67c1e979 4396 v0mi->Update(primvertex);
4397 }
4398 }
4399 }
4400}
44347160 4401//------------------------------------------------------------------------
e50912db 4402void AliITStrackerMI::BuildMaterialLUT(TString material) {
4403 //--------------------------------------------------------------------
4404 // Fill a look-up table with mean material
4405 //--------------------------------------------------------------------
4406
4407 Int_t n=1000;
4408 Double_t mparam[7];
4409 Double_t point1[3],point2[3];
4410 Double_t phi,cosphi,sinphi,z;
4411 // 0-5 layers, 6 pipe, 7-8 shields
4412 Double_t rmin[9]={ 3.5, 5.5,13.0,22.0,35.0,41.0, 2.0, 7.5,25.0};
4413 Double_t rmax[9]={ 5.5, 7.3,17.0,26.0,41.0,47.0, 3.0,10.5,30.0};
4414
4415 Int_t ifirst=0,ilast=0;
4416 if(material.Contains("Pipe")) {
4417 ifirst=6; ilast=6;
4418 } else if(material.Contains("Shields")) {
4419 ifirst=7; ilast=8;
4420 } else if(material.Contains("Layers")) {
4421 ifirst=0; ilast=5;
4422 } else {
4423 Error("BuildMaterialLUT","Wrong layer name\n");
4424 }
4425
4426 for(Int_t imat=ifirst; imat<=ilast; imat++) {
4427 Double_t param[5]={0.,0.,0.,0.,0.};
4428 for (Int_t i=0; i<n; i++) {
4429 phi = 2.*TMath::Pi()*gRandom->Rndm();
4430 cosphi = TMath::Cos(phi); sinphi = TMath::Sin(phi);
4431 z = 14.*(-1.+2.*gRandom->Rndm()); // SPD barrel
4432 point1[0] = rmin[imat]*cosphi;
4433 point1[1] = rmin[imat]*sinphi;
4434 point1[2] = z;
4435 point2[0] = rmax[imat]*cosphi;
4436 point2[1] = rmax[imat]*sinphi;
4437 point2[2] = z;
4438 AliTracker::MeanMaterialBudget(point1,point2,mparam);
4439 for(Int_t j=0;j<5;j++) param[j]+=mparam[j];
4440 }
4441 for(Int_t j=0;j<5;j++) param[j]/=(Float_t)n;
4442 if(imat<=5) {
4443 fxOverX0Layer[imat] = param[1];
4444 fxTimesRhoLayer[imat] = param[0]*param[4];
4445 } else if(imat==6) {
4446 fxOverX0Pipe = param[1];
4447 fxTimesRhoPipe = param[0]*param[4];
4448 } else if(imat==7) {
4449 fxOverX0Shield[0] = param[1];
4450 fxTimesRhoShield[0] = param[0]*param[4];
4451 } else if(imat==8) {
4452 fxOverX0Shield[1] = param[1];
4453 fxTimesRhoShield[1] = param[0]*param[4];
4454 }
4455 }
4456 /*
4457 printf("%s\n",material.Data());
4458 printf("%f %f\n",fxOverX0Pipe,fxTimesRhoPipe);
4459 printf("%f %f\n",fxOverX0Shield[0],fxTimesRhoShield[0]);
4460 printf("%f %f\n",fxOverX0Shield[1],fxTimesRhoShield[1]);
4461 printf("%f %f\n",fxOverX0Layer[0],fxTimesRhoLayer[0]);
4462 printf("%f %f\n",fxOverX0Layer[1],fxTimesRhoLayer[1]);
4463 printf("%f %f\n",fxOverX0Layer[2],fxTimesRhoLayer[2]);
4464 printf("%f %f\n",fxOverX0Layer[3],fxTimesRhoLayer[3]);
4465 printf("%f %f\n",fxOverX0Layer[4],fxTimesRhoLayer[4]);
4466 printf("%f %f\n",fxOverX0Layer[5],fxTimesRhoLayer[5]);
4467 */
4468 return;
4469}
4470//------------------------------------------------------------------------
4471Int_t AliITStrackerMI::CorrectForPipeMaterial(AliITStrackMI *t,
4472 TString direction) {
4473 //-------------------------------------------------------------------
4474 // Propagate beyond beam pipe and correct for material
4475 // (material budget in different ways according to fUseTGeo value)
4476 //-------------------------------------------------------------------
4477
4478 // Define budget mode:
4479 // 0: material from AliITSRecoParam (hard coded)
4480 // 1: material from TGeo (on the fly)
4481 // 2: material from lut
4482 // 3: material from TGeo (same for all hypotheses)
4483 Int_t mode;
4484 switch(fUseTGeo) {
4485 case 0:
4486 mode=0;
4487 break;
4488 case 1:
4489 mode=1;
4490 break;
4491 case 2:
4492 mode=2;
4493 break;
4494 case 3:
4495 if(fTrackingPhase.Contains("Clusters2Tracks"))
4496 { mode=3; } else { mode=1; }
4497 break;
4498 case 4:
4499 if(fTrackingPhase.Contains("Clusters2Tracks"))
4500 { mode=3; } else { mode=2; }
4501 break;
4502 default:
4503 mode=0;
4504 break;
4505 }
4506 if(fTrackingPhase.Contains("Default")) mode=0;
4507
4508 Int_t index=fCurrentEsdTrack;
4509
4510 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4511 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
4512 Double_t xToGo; t->GetLocalXat(rToGo,xToGo);
4513
4514 Double_t xOverX0,x0,lengthTimesMeanDensity;
4515 Bool_t anglecorr=kTRUE;
4516
4517 switch(mode) {
4518 case 0:
4519 xOverX0 = AliITSRecoParam::GetdPipe();
4520 x0 = AliITSRecoParam::GetX0Be();
4521 lengthTimesMeanDensity = xOverX0*x0;
4522 break;
4523 case 1:
4524 if (!t->PropagateToTGeo(xToGo,1)) return 0;
4525 return 1;
4526 break;
4527 case 2:
4528 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
4529 xOverX0 = fxOverX0Pipe;
4530 lengthTimesMeanDensity = fxTimesRhoPipe;
4531 break;
4532 case 3:
4533 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
4534 if(fxOverX0PipeTrks[index]<0) {
4535 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4536 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4537 (1.-t->GetSnp()*t->GetSnp()));
4538 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
4539 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4540 return 1;
4541 }
4542 xOverX0 = fxOverX0PipeTrks[index];
4543 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
4544 break;
4545 }
4546
4547 lengthTimesMeanDensity *= dir;
4548
4549 if (!t->AliExternalTrackParam::PropagateTo(xToGo,GetBz())) return 0;
4550 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4551
4552 return 1;
4553}
4554//------------------------------------------------------------------------
4555Int_t AliITStrackerMI::CorrectForShieldMaterial(AliITStrackMI *t,
4556 TString shield,
4557 TString direction) {
4558 //-------------------------------------------------------------------
4559 // Propagate beyond SPD or SDD shield and correct for material
4560 // (material budget in different ways according to fUseTGeo value)
4561 //-------------------------------------------------------------------
4562
4563 // Define budget mode:
4564 // 0: material from AliITSRecoParam (hard coded)
4565 // 1: material from TGeo (on the fly)
4566 // 2: material from lut
4567 // 3: material from TGeo (same for all hypotheses)
4568 Int_t mode;
4569 switch(fUseTGeo) {
4570 case 0:
4571 mode=0;
4572 break;
4573 case 1:
4574 mode=1;
4575 break;
4576 case 2:
4577 mode=2;
4578 break;
4579 case 3:
4580 if(fTrackingPhase.Contains("Clusters2Tracks"))
4581 { mode=3; } else { mode=1; }
4582 break;
4583 case 4:
4584 if(fTrackingPhase.Contains("Clusters2Tracks"))
4585 { mode=3; } else { mode=2; }
4586 break;
4587 default:
4588 mode=0;
4589 break;
4590 }
4591 if(fTrackingPhase.Contains("Default")) mode=0;
4592
4593 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4594 Double_t rToGo;
4595 Int_t shieldindex=0;
4596 if (shield.Contains("SDD")) { // SDDouter
4597 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(1) : AliITSRecoParam::GetrOutsideShield(1));
4598 shieldindex=1;
4599 } else if (shield.Contains("SPD")) { // SPDouter
4600 rToGo=(dir>0 ? AliITSRecoParam::GetrInsideShield(0) : AliITSRecoParam::GetrOutsideShield(0));
4601 shieldindex=0;
4602 } else {
4603 Error("CorrectForShieldMaterial"," Wrong shield name\n");
e50912db 4604 return 0;
4605 }
4606 Double_t xToGo; t->GetLocalXat(rToGo,xToGo);
4607
4608 Int_t index=2*fCurrentEsdTrack+shieldindex;
4609
4610 Double_t xOverX0,x0,lengthTimesMeanDensity;
4611 Bool_t anglecorr=kTRUE;
4612
4613 switch(mode) {
4614 case 0:
4615 xOverX0 = AliITSRecoParam::Getdshield(shieldindex);
4616 x0 = AliITSRecoParam::GetX0shield(shieldindex);
4617 lengthTimesMeanDensity = xOverX0*x0;
4618 break;
4619 case 1:
4620 if (!t->PropagateToTGeo(xToGo,1)) return 0;
4621 return 1;
4622 break;
4623 case 2:
4624 if(fxOverX0Shield[shieldindex]<0) BuildMaterialLUT("Shields");
4625 xOverX0 = fxOverX0Shield[shieldindex];
4626 lengthTimesMeanDensity = fxTimesRhoShield[shieldindex];
4627 break;
4628 case 3:
4629 if(!fxOverX0ShieldTrks || index<0 || index>=2*fNtracks) Error("CorrectForShieldMaterial","Incorrect usage of UseTGeo option!\n");
4630 if(fxOverX0ShieldTrks[index]<0) {
4631 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
4632 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4633 (1.-t->GetSnp()*t->GetSnp()));
4634 fxOverX0ShieldTrks[index] = TMath::Abs(xOverX0)/angle;
4635 fxTimesRhoShieldTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
4636 return 1;
4637 }
4638 xOverX0 = fxOverX0ShieldTrks[index];
4639 lengthTimesMeanDensity = fxTimesRhoShieldTrks[index];
4640 break;
4641 }
4642
4643 lengthTimesMeanDensity *= dir;
4644
4645 if (!t->AliExternalTrackParam::PropagateTo(xToGo,GetBz())) return 0;
4646 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4647
4648 return 1;
4649}
4650//------------------------------------------------------------------------
4651Int_t AliITStrackerMI::CorrectForLayerMaterial(AliITStrackMI *t,
4652 Int_t layerindex,
4653 Double_t oldGlobXYZ[3],
4654 TString direction) {
4655 //-------------------------------------------------------------------
4656 // Propagate beyond layer and correct for material
4657 // (material budget in different ways according to fUseTGeo value)
4658 //-------------------------------------------------------------------
4659
4660 // Define budget mode:
4661 // 0: material from AliITSRecoParam (hard coded)
4662 // 1: material from TGeo (on the fly)
4663 // 2: material from lut
4664 // 3: material from TGeo (same for all hypotheses)
4665 Int_t mode;
4666 switch(fUseTGeo) {
4667 case 0:
4668 mode=0;
4669 break;
4670 case 1:
4671 mode=1;
4672 break;
4673 case 2:
4674 mode=2;
4675 break;
4676 case 3:
4677 if(fTrackingPhase.Contains("Clusters2Tracks"))
4678 { mode=3; } else { mode=1; }
4679 break;
4680 case 4:
4681 if(fTrackingPhase.Contains("Clusters2Tracks"))
4682 { mode=3; } else { mode=2; }
4683 break;
4684 default:
4685 mode=0;
4686 break;
4687 }
4688 if(fTrackingPhase.Contains("Default")) mode=0;
4689
4690 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
4691
4692 Double_t r=fgLayers[layerindex].GetR();
4693 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
4694
4695 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
4696 Double_t xToGo; t->GetLocalXat(rToGo,xToGo);
4697
4698 Int_t index=6*fCurrentEsdTrack+layerindex;
4699
4700 // Bring the track beyond the material
4701 if (!t->AliExternalTrackParam::PropagateTo(xToGo,GetBz())) return 0;
4702 Double_t globXYZ[3];
4703 t->GetXYZ(globXYZ);
4704
4705 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
4706 Double_t mparam[7];
4707 Bool_t anglecorr=kTRUE;
4708
4709 switch(mode) {
4710 case 0:
4711 xOverX0 = fgLayers[layerindex].GetThickness(t->GetY(),t->GetZ(),x0);
4712 lengthTimesMeanDensity = xOverX0*x0;
4713 break;
4714 case 1:
4715 AliTracker::MeanMaterialBudget(oldGlobXYZ,globXYZ,mparam);
4716 if(mparam[1]>900000) return 0;
4717 xOverX0=mparam[1];
4718 lengthTimesMeanDensity=mparam[0]*mparam[4];
4719 anglecorr=kFALSE;
4720 break;
4721 case 2:
4722 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
4723 xOverX0 = fxOverX0Layer[layerindex];
4724 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
4725 break;
4726 case 3:
4727 if(!fxOverX0LayerTrks || index<0 || index>=6*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
4728 if(fxOverX0LayerTrks[index]<0) {
4729 AliTracker::MeanMaterialBudget(oldGlobXYZ,globXYZ,mparam);
4730 if(mparam[1]>900000) return 0;
4731 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
4732 (1.-t->GetSnp()*t->GetSnp()));
4733 xOverX0=mparam[1]/angle;
4734 lengthTimesMeanDensity=mparam[0]*mparam[4]/angle;
4735 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0);
4736 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity);
4737 }
4738 xOverX0 = fxOverX0LayerTrks[index];
4739 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
4740 break;
4741 }
4742
4743 lengthTimesMeanDensity *= dir;
4744
4745 if (!t->CorrectForMeanMaterial(xOverX0,lengthTimesMeanDensity,anglecorr)) return 0;
4746
4747 return 1;
4748}
4749//------------------------------------------------------------------------
4750void AliITStrackerMI::MakeTrksMaterialLUT(Int_t ntracks) {
4751 //-----------------------------------------------------------------
4752 // Initialize LUT for storing material for each prolonged track
4753 //-----------------------------------------------------------------
4754 fxOverX0PipeTrks = new Float_t[ntracks];
4755 fxTimesRhoPipeTrks = new Float_t[ntracks];
4756 fxOverX0ShieldTrks = new Float_t[ntracks*2];
4757 fxTimesRhoShieldTrks = new Float_t[ntracks*2];
4758 fxOverX0LayerTrks = new Float_t[ntracks*6];
4759 fxTimesRhoLayerTrks = new Float_t[ntracks*6];
4760
4761 for(Int_t i=0; i<ntracks; i++) {
4762 fxOverX0PipeTrks[i] = -1.;
4763 fxTimesRhoPipeTrks[i] = -1.;
4764 }
4765 for(Int_t j=0; j<ntracks*2; j++) {
4766 fxOverX0ShieldTrks[j] = -1.;
4767 fxTimesRhoShieldTrks[j] = -1.;
4768 }
4769 for(Int_t k=0; k<ntracks*6; k++) {
4770 fxOverX0LayerTrks[k] = -1.;
4771 fxTimesRhoLayerTrks[k] = -1.;
4772 }
4773
4774 fNtracks = ntracks;
4775
4776 return;
4777}
4778//------------------------------------------------------------------------
4779void AliITStrackerMI::DeleteTrksMaterialLUT() {
4780 //-----------------------------------------------------------------
4781 // Delete LUT for storing material for each prolonged track
4782 //-----------------------------------------------------------------
4783 if(fxOverX0PipeTrks) {
4784 delete [] fxOverX0PipeTrks; fxOverX0PipeTrks = 0;
4785 }
4786 if(fxOverX0ShieldTrks) {
4787 delete [] fxOverX0ShieldTrks; fxOverX0ShieldTrks = 0;
4788 }
4789
4790 if(fxOverX0LayerTrks) {
4791 delete [] fxOverX0LayerTrks; fxOverX0LayerTrks = 0;
4792 }
4793 if(fxTimesRhoPipeTrks) {
4794 delete [] fxTimesRhoPipeTrks; fxTimesRhoPipeTrks = 0;
4795 }
4796 if(fxTimesRhoShieldTrks) {
4797 delete [] fxTimesRhoShieldTrks; fxTimesRhoShieldTrks = 0;
4798 }
4799 if(fxTimesRhoLayerTrks) {
4800 delete [] fxTimesRhoLayerTrks; fxTimesRhoLayerTrks = 0;
4801 }
4802 return;
4803}
4804//------------------------------------------------------------------------
6518a6c5 4805Int_t AliITStrackerMI::CheckSkipLayer(AliITStrackMI *track,
4806 Int_t ilayer,Int_t idet) const {
2755f080 4807 //-----------------------------------------------------------------
4808 // This method is used to decide whether to allow a prolongation
4809 // without clusters, because we want to skip the layer.
4810 // In this case the return value is > 0:
4811 // return 1: the user requested to skip a layer
4812 // return 2: track outside z acceptance of SSD/SDD and will cross both SPD
4813 //-----------------------------------------------------------------
e43c066c 4814
2755f080 4815 if (AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilayer)) return 1;
51ad6848 4816
2755f080 4817 if (idet<0 && ilayer>1 && AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance()) {
4818 // check if track will cross SPD outer layer
4819 Double_t phiAtSPD2,zAtSPD2;
6518a6c5 4820 if (track->GetPhiZat(fgLayers[1].GetR(),phiAtSPD2,zAtSPD2)) {
2755f080 4821 if (TMath::Abs(zAtSPD2)<2.*AliITSRecoParam::GetSPDdetzlength()) return 2;
4822 }
4823 }
51ad6848 4824
2755f080 4825 return 0;
4826}
4827//------------------------------------------------------------------------
6518a6c5 4828Int_t AliITStrackerMI::CheckDeadZone(/*AliITStrackMI *track,*/
4829 Int_t ilayer,/*Int_t idet,*/
4830 Double_t zmin,Double_t zmax/*,Double_t ymin,Double_t ymax*/) const {
4831 //-----------------------------------------------------------------
4832 // This method is used to decide whether to allow a prolongation
4833 // without clusters, because there is dead zone in the road.
4834 // In this case the return value is > 0:
4835 // return 1: dead zone at z=0,+-7cm in SPD
4836 // return 2: dead area from the OCDB
4837 //-----------------------------------------------------------------
4838
4839 // check dead zones at z=0,+-7cm in the SPD
4840 if (ilayer<2 && !AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
4841 Double_t zmindead[3]={fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
4842 fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength(),
4843 fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength()};
4844 Double_t zmaxdead[3]={fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
4845 fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength(),
4846 fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength()};
4847 for (Int_t i=0; i<3; i++)
4848 if (zmin<zmaxdead[i] && zmax>zmindead[i]) return 1;
4849
4850 }
4851
4852 if (AliITSReconstructor::GetRecoParam()->GetUseDeadZonesFromOCDB()) {
4853 // NOT YET IMPLEMENTED
4854 // look in OCDB
4855 //if (deadfromOCDB) return 2;
4856 }
4857
4858 return 0;
4859}
4860//------------------------------------------------------------------------
4a66240a 4861