Do not allow prolongation without clusters of tracks with |tan lambda| > 1.1 (A....
[u/mrichter/AliRoot.git] / ITS / AliITStrackerMI.cxx
CommitLineData
e43c066c 1/**************************************************************************
9a5326b1 2 * Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
e43c066c 3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
fddf8459 15/* $Id$ */
bf6adc12 16
e43c066c 17//-------------------------------------------------------------------------
18// Implementation of the ITS tracker class
00a7cc50 19// It reads AliITSRecPoint clusters and creates AliITStrackMI tracks
e43c066c 20// and fills with them the ESD
15dd636f 21// Origin: Marian Ivanov, CERN, Marian.Ivanov@cern.ch
23197852 22// Current support and development:
23// Andrea Dainese, andrea.dainese@lnl.infn.it
afd25725 24// dE/dx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
25// Params moved to AliITSRecoParam by: Andrea Dainese, INFN
26// Material budget from TGeo by: Ludovic Gaudichet & Andrea Dainese, INFN
e43c066c 27//-------------------------------------------------------------------------
bf6adc12 28
29#include <TMatrixD.h>
e43c066c 30#include <TTree.h>
afd25725 31#include <TDatabasePDG.h>
9a5326b1 32#include <TString.h>
e50912db 33#include <TRandom.h>
a70ed6ad 34#include <TTreeStream.h>
bf6adc12 35
4187a601 36#include "AliLog.h"
a70ed6ad 37#include "AliITSPlaneEff.h"
38#include "AliITSCalibrationSPD.h"
39#include "AliITSCalibrationSDD.h"
40#include "AliITSCalibrationSSD.h"
41#include "AliCDBEntry.h"
42#include "AliCDBManager.h"
43#include "AliAlignObj.h"
44#include "AliTrackPointArray.h"
45#include "AliESDVertex.h"
af885e0f 46#include "AliESDEvent.h"
aad72f45 47#include "AliESDtrack.h"
6c94f330 48#include "AliV0.h"
bf6adc12 49#include "AliHelix.h"
a70ed6ad 50#include "AliITSChannelStatus.h"
51#include "AliITSDetTypeRec.h"
00a7cc50 52#include "AliITSRecPoint.h"
e341247d 53#include "AliITSgeomTGeo.h"
44347160 54#include "AliITSReconstructor.h"
572f41f9 55#include "AliITSClusterParam.h"
23197852 56#include "AliITSsegmentation.h"
57#include "AliITSCalibration.h"
7167ae53 58#include "AliITSPlaneEffSPD.h"
59#include "AliITSPlaneEffSDD.h"
60#include "AliITSPlaneEffSSD.h"
44396017 61#include "AliITSV0Finder.h"
ae00569a 62#include "AliITStrackerMI.h"
e43c066c 63
64ClassImp(AliITStrackerMI)
e43c066c 65
e50912db 66AliITStrackerMI::AliITSlayer AliITStrackerMI::fgLayers[AliITSgeomTGeo::kNLayers]; // ITS layers
44347160 67
8221b41b 68AliITStrackerMI::AliITStrackerMI():AliTracker(),
69fI(0),
70fBestTrack(),
71fTrackToFollow(),
72fTrackHypothesys(),
73fBestHypothesys(),
74fOriginal(),
75fCurrentEsdTrack(),
76fPass(0),
77fAfterV0(kFALSE),
78fLastLayerToTrackTo(0),
afd25725 79fCoefficients(0),
8221b41b 80fEsd(0),
e50912db 81fTrackingPhase("Default"),
6518a6c5 82fUseTGeo(3),
e50912db 83fNtracks(0),
84fxOverX0Pipe(-1.),
85fxTimesRhoPipe(-1.),
86fxOverX0PipeTrks(0),
87fxTimesRhoPipeTrks(0),
88fxOverX0ShieldTrks(0),
89fxTimesRhoShieldTrks(0),
90fxOverX0LayerTrks(0),
91fxTimesRhoLayerTrks(0),
4a66240a 92fDebugStreamer(0),
23197852 93fITSChannelStatus(0),
a70ed6ad 94fkDetTypeRec(0),
ae00569a 95fPlaneEff(0) {
8221b41b 96 //Default constructor
e50912db 97 Int_t i;
98 for(i=0;i<4;i++) fSPDdetzcentre[i]=0.;
99 for(i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
100 for(i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
8221b41b 101}
44347160 102//------------------------------------------------------------------------
1f3e997f 103AliITStrackerMI::AliITStrackerMI(const Char_t *geom) : AliTracker(),
e50912db 104fI(AliITSgeomTGeo::GetNLayers()),
8221b41b 105fBestTrack(),
106fTrackToFollow(),
107fTrackHypothesys(),
108fBestHypothesys(),
109fOriginal(),
110fCurrentEsdTrack(),
111fPass(0),
112fAfterV0(kFALSE),
e50912db 113fLastLayerToTrackTo(AliITSRecoParam::GetLastLayerToTrackTo()),
afd25725 114fCoefficients(0),
8221b41b 115fEsd(0),
e50912db 116fTrackingPhase("Default"),
6518a6c5 117fUseTGeo(3),
e50912db 118fNtracks(0),
119fxOverX0Pipe(-1.),
120fxTimesRhoPipe(-1.),
121fxOverX0PipeTrks(0),
122fxTimesRhoPipeTrks(0),
123fxOverX0ShieldTrks(0),
124fxTimesRhoShieldTrks(0),
125fxOverX0LayerTrks(0),
126fxTimesRhoLayerTrks(0),
4a66240a 127fDebugStreamer(0),
23197852 128fITSChannelStatus(0),
a70ed6ad 129fkDetTypeRec(0),
ae00569a 130fPlaneEff(0) {
e43c066c 131 //--------------------------------------------------------------------
132 //This is the AliITStrackerMI constructor
133 //--------------------------------------------------------------------
e341247d 134 if (geom) {
135 AliWarning("\"geom\" is actually a dummy argument !");
136 }
137
afd25725 138 fCoefficients = 0;
628e7bb0 139 fAfterV0 = kFALSE;
e341247d 140
e50912db 141 for (Int_t i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
e341247d 142 Int_t nlad=AliITSgeomTGeo::GetNLadders(i);
143 Int_t ndet=AliITSgeomTGeo::GetNDetectors(i);
144
145 Double_t xyz[3], &x=xyz[0], &y=xyz[1], &z=xyz[2];
146 AliITSgeomTGeo::GetOrigTranslation(i,1,1,xyz);
e43c066c 147 Double_t poff=TMath::ATan2(y,x);
148 Double_t zoff=z;
e341247d 149 Double_t r=TMath::Sqrt(x*x + y*y);
e43c066c 150
e341247d 151 AliITSgeomTGeo::GetOrigTranslation(i,1,2,xyz);
e43c066c 152 r += TMath::Sqrt(x*x + y*y);
e341247d 153 AliITSgeomTGeo::GetOrigTranslation(i,2,1,xyz);
e43c066c 154 r += TMath::Sqrt(x*x + y*y);
e341247d 155 AliITSgeomTGeo::GetOrigTranslation(i,2,2,xyz);
e43c066c 156 r += TMath::Sqrt(x*x + y*y);
157 r*=0.25;
158
159 new (fgLayers+i-1) AliITSlayer(r,poff,zoff,nlad,ndet);
160
161 for (Int_t j=1; j<nlad+1; j++) {
162 for (Int_t k=1; k<ndet+1; k++) { //Fill this layer with detectors
e341247d 163 TGeoHMatrix m; AliITSgeomTGeo::GetOrigMatrix(i,j,k,m);
1f3e997f 164 const TGeoHMatrix *tm=AliITSgeomTGeo::GetTracking2LocalMatrix(i,j,k);
165 m.Multiply(tm);
a5d0fae6 166 Double_t txyz[3]={0.};
167 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
1f3e997f 168 m.LocalToMaster(txyz,xyz);
a5d0fae6 169 r=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
1f3e997f 170 Double_t phi=TMath::ATan2(xyz[1],xyz[0]);
e341247d 171
172 if (phi<0) phi+=TMath::TwoPi();
173 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();
174
e43c066c 175 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
176 new(&det) AliITSdetector(r,phi);
1c97ce2f 177 // compute the real radius (with misalignment)
178 TGeoHMatrix mmisal(*(AliITSgeomTGeo::GetMatrix(i,j,k)));
179 mmisal.Multiply(tm);
180 xyz[0]=0.;xyz[1]=0.;xyz[2]=0.;
181 mmisal.LocalToMaster(txyz,xyz);
182 Double_t rmisal=TMath::Sqrt(xyz[0]*xyz[0] + xyz[1]*xyz[1]);
183 det.SetRmisal(rmisal);
184
23197852 185 } // end loop on detectors
186 } // end loop on ladders
4fa7f7d1 187 fForceSkippingOfLayer[i] = 0;
23197852 188 } // end loop on layers
e43c066c 189
e43c066c 190
e50912db 191 fI=AliITSgeomTGeo::GetNLayers();
e43c066c 192
193 fPass=0;
194 fConstraint[0]=1; fConstraint[1]=0;
195
afd25725 196 Double_t xyzVtx[]={AliITSReconstructor::GetRecoParam()->GetXVdef(),
197 AliITSReconstructor::GetRecoParam()->GetYVdef(),
198 AliITSReconstructor::GetRecoParam()->GetZVdef()};
199 Double_t ersVtx[]={AliITSReconstructor::GetRecoParam()->GetSigmaXVdef(),
200 AliITSReconstructor::GetRecoParam()->GetSigmaYVdef(),
201 AliITSReconstructor::GetRecoParam()->GetSigmaZVdef()};
202 SetVertex(xyzVtx,ersVtx);
e43c066c 203
e50912db 204 fLastLayerToTrackTo=AliITSRecoParam::GetLastLayerToTrackTo();
628e7bb0 205 for (Int_t i=0;i<100000;i++){
206 fBestTrackIndex[i]=0;
207 }
afd25725 208
209 // store positions of centre of SPD modules (in z)
210 Double_t tr[3];
211 AliITSgeomTGeo::GetTranslation(1,1,1,tr);
212 fSPDdetzcentre[0] = tr[2];
213 AliITSgeomTGeo::GetTranslation(1,1,2,tr);
214 fSPDdetzcentre[1] = tr[2];
215 AliITSgeomTGeo::GetTranslation(1,1,3,tr);
216 fSPDdetzcentre[2] = tr[2];
217 AliITSgeomTGeo::GetTranslation(1,1,4,tr);
218 fSPDdetzcentre[3] = tr[2];
219
afd25725 220 fUseTGeo = AliITSReconstructor::GetRecoParam()->GetUseTGeoInTracker();
6518a6c5 221 if(AliITSReconstructor::GetRecoParam()->GetExtendedEtaAcceptance() && fUseTGeo!=1 && fUseTGeo!=3) {
222 AliWarning("fUseTGeo changed to 3 because fExtendedEtaAcceptance is kTRUE");
223 fUseTGeo = 3;
224 }
e50912db 225
226 for(Int_t i=0;i<2;i++) {fxOverX0Shield[i]=-1.;fxTimesRhoShield[i]=-1.;}
227 for(Int_t i=0;i<6;i++) {fxOverX0Layer[i]=-1.;fxTimesRhoLayer[i]=-1.;}
228
81e97e0d 229 fDebugStreamer = new TTreeSRedirector("ITSdebug.root");
230
7167ae53 231 // only for plane efficiency evaluation
58e8dc31 232 if (AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
233 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0) {
0ed58a47 234 Int_t iplane=AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff();
1a64bda6 235 if(!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(iplane)==1)
0ed58a47 236 AliWarning(Form("Evaluation of Plane Eff for layer %d will be attempted without removing it from tracker",iplane));
237 if (iplane<2) fPlaneEff = new AliITSPlaneEffSPD();
238 else if (iplane<4) fPlaneEff = new AliITSPlaneEffSDD();
239 else fPlaneEff = new AliITSPlaneEffSSD();
275a301c 240 if(AliITSReconstructor::GetRecoParam()->GetReadPlaneEffFromOCDB())
0ed58a47 241 if(!fPlaneEff->ReadFromCDB()) {AliWarning("AliITStrackerMI reading of AliITSPlaneEff from OCDB failed") ;}
242 if(AliITSReconstructor::GetRecoParam()->GetHistoPlaneEff()) fPlaneEff->SetCreateHistos(kTRUE);
7167ae53 243 }
628e7bb0 244}
44347160 245//------------------------------------------------------------------------
8221b41b 246AliITStrackerMI::AliITStrackerMI(const AliITStrackerMI &tracker):AliTracker(tracker),
247fI(tracker.fI),
248fBestTrack(tracker.fBestTrack),
249fTrackToFollow(tracker.fTrackToFollow),
250fTrackHypothesys(tracker.fTrackHypothesys),
251fBestHypothesys(tracker.fBestHypothesys),
252fOriginal(tracker.fOriginal),
253fCurrentEsdTrack(tracker.fCurrentEsdTrack),
254fPass(tracker.fPass),
255fAfterV0(tracker.fAfterV0),
256fLastLayerToTrackTo(tracker.fLastLayerToTrackTo),
afd25725 257fCoefficients(tracker.fCoefficients),
8221b41b 258fEsd(tracker.fEsd),
e50912db 259fTrackingPhase(tracker.fTrackingPhase),
afd25725 260fUseTGeo(tracker.fUseTGeo),
e50912db 261fNtracks(tracker.fNtracks),
262fxOverX0Pipe(tracker.fxOverX0Pipe),
263fxTimesRhoPipe(tracker.fxTimesRhoPipe),
264fxOverX0PipeTrks(0),
265fxTimesRhoPipeTrks(0),
266fxOverX0ShieldTrks(0),
267fxTimesRhoShieldTrks(0),
268fxOverX0LayerTrks(0),
269fxTimesRhoLayerTrks(0),
4a66240a 270fDebugStreamer(tracker.fDebugStreamer),
23197852 271fITSChannelStatus(tracker.fITSChannelStatus),
a70ed6ad 272fkDetTypeRec(tracker.fkDetTypeRec),
ae00569a 273fPlaneEff(tracker.fPlaneEff) {
8221b41b 274 //Copy constructor
e50912db 275 Int_t i;
276 for(i=0;i<4;i++) {
277 fSPDdetzcentre[i]=tracker.fSPDdetzcentre[i];
278 }
279 for(i=0;i<6;i++) {
280 fxOverX0Layer[i]=tracker.fxOverX0Layer[i];
281 fxTimesRhoLayer[i]=tracker.fxTimesRhoLayer[i];
282 }
283 for(i=0;i<2;i++) {
284 fxOverX0Shield[i]=tracker.fxOverX0Shield[i];
285 fxTimesRhoShield[i]=tracker.fxTimesRhoShield[i];
286 }
8221b41b 287}
44347160 288//------------------------------------------------------------------------
8221b41b 289AliITStrackerMI & AliITStrackerMI::operator=(const AliITStrackerMI &tracker){
290 //Assignment operator
291 this->~AliITStrackerMI();
292 new(this) AliITStrackerMI(tracker);
293 return *this;
294}
44347160 295//------------------------------------------------------------------------
628e7bb0 296AliITStrackerMI::~AliITStrackerMI()
297{
298 //
299 //destructor
300 //
e50912db 301 if (fCoefficients) delete [] fCoefficients;
302 DeleteTrksMaterialLUT();
81e97e0d 303 if (fDebugStreamer) {
304 //fDebugStreamer->Close();
305 delete fDebugStreamer;
306 }
23197852 307 if(fITSChannelStatus) delete fITSChannelStatus;
308 if(fPlaneEff) delete fPlaneEff;
e43c066c 309}
44347160 310//------------------------------------------------------------------------
23197852 311void AliITStrackerMI::ReadBadFromDetTypeRec() {
312 //--------------------------------------------------------------------
313 //This function read ITS bad detectors, chips, channels from AliITSDetTypeRec
314 //i.e. from OCDB
315 //--------------------------------------------------------------------
316
317 if(!AliITSReconstructor::GetRecoParam()->GetUseBadZonesFromOCDB()) return;
318
4187a601 319 Info("ReadBadFromDetTypeRec","Reading info about bad ITS detectors and channels");
23197852 320
a70ed6ad 321 if(!fkDetTypeRec) Error("ReadBadFromDetTypeRec","AliITSDetTypeRec nof found!\n");
23197852 322
323 // ITS channels map
324 if(fITSChannelStatus) delete fITSChannelStatus;
a70ed6ad 325 fITSChannelStatus = new AliITSChannelStatus(fkDetTypeRec);
23197852 326
327 // ITS detectors and chips
328 Int_t i=0,j=0,k=0,ndet=0;
329 for (i=1; i<AliITSgeomTGeo::GetNLayers()+1; i++) {
4187a601 330 Int_t nBadDetsPerLayer=0;
23197852 331 ndet=AliITSgeomTGeo::GetNDetectors(i);
332 for (j=1; j<AliITSgeomTGeo::GetNLadders(i)+1; j++) {
333 for (k=1; k<ndet+1; k++) {
334 AliITSdetector &det=fgLayers[i-1].GetDetector((j-1)*ndet + k-1);
a70ed6ad 335 det.ReadBadDetectorAndChips(i-1,(j-1)*ndet + k-1,fkDetTypeRec);
4187a601 336 if(det.IsBad()) {nBadDetsPerLayer++;}
23197852 337 } // end loop on detectors
338 } // end loop on ladders
4187a601 339 Info("ReadBadFromDetTypeRec",Form("Layer %d: %d bad out of %d",i-1,nBadDetsPerLayer,ndet*AliITSgeomTGeo::GetNLadders(i)));
23197852 340 } // end loop on layers
341
342 return;
343}
344//------------------------------------------------------------------------
e43c066c 345Int_t AliITStrackerMI::LoadClusters(TTree *cTree) {
346 //--------------------------------------------------------------------
347 //This function loads ITS clusters
348 //--------------------------------------------------------------------
00a7cc50 349 TBranch *branch=cTree->GetBranch("ITSRecPoints");
e43c066c 350 if (!branch) {
351 Error("LoadClusters"," can't get the branch !\n");
352 return 1;
353 }
354
23197852 355 static TClonesArray dummy("AliITSRecPoint",10000), *clusters=&dummy;
e43c066c 356 branch->SetAddress(&clusters);
0cc18512 357
23197852 358 Int_t i=0,j=0,ndet=0;
e43c066c 359 Int_t detector=0;
23197852 360 for (i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
361 ndet=fgLayers[i].GetNdetectors();
e43c066c 362 Int_t jmax = j + fgLayers[i].GetNladders()*ndet;
363 for (; j<jmax; j++) {
0cc18512 364 if (!cTree->GetEvent(j)) continue;
e43c066c 365 Int_t ncl=clusters->GetEntriesFast();
366 SignDeltas(clusters,GetZ());
1f3e997f 367
e43c066c 368 while (ncl--) {
00a7cc50 369 AliITSRecPoint *c=(AliITSRecPoint*)clusters->UncheckedAt(ncl);
75fb37cc 370 detector=c->GetDetectorIndex();
a504d56f 371
75fb37cc 372 if (!c->Misalign()) AliWarning("Can't misalign this cluster !");
a504d56f 373
00a7cc50 374 fgLayers[i].InsertCluster(new AliITSRecPoint(*c));
e43c066c 375 }
0cc18512 376 clusters->Clear();
afd25725 377 // add dead zone "virtual" cluster in SPD, if there is a cluster within
378 // zwindow cm from the dead zone
379 if (i<2 && AliITSReconstructor::GetRecoParam()->GetAddVirtualClustersInDeadZone()) {
e50912db 380 for (Float_t xdead = 0; xdead < AliITSRecoParam::GetSPDdetxlength(); xdead += (i+1.)*AliITSReconstructor::GetRecoParam()->GetXPassDeadZoneHits()) {
afd25725 381 Int_t lab[4] = {0,0,0,detector};
382 Int_t info[3] = {0,0,i};
6518a6c5 383 Float_t q = 0.; // this identifies virtual clusters
afd25725 384 Float_t hit[5] = {xdead,
385 0.,
386 AliITSReconstructor::GetRecoParam()->GetSigmaXDeadZoneHit2(),
387 AliITSReconstructor::GetRecoParam()->GetSigmaZDeadZoneHit2(),
388 q};
389 Bool_t local = kTRUE;
390 Double_t zwindow = AliITSReconstructor::GetRecoParam()->GetZWindowDeadZone();
e50912db 391 hit[1] = fSPDdetzcentre[0]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 392 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
393 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 394 hit[1] = fSPDdetzcentre[1]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 395 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
396 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 397 hit[1] = fSPDdetzcentre[1]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 398 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
399 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 400 hit[1] = fSPDdetzcentre[2]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 401 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
402 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 403 hit[1] = fSPDdetzcentre[2]+0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 404 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
405 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e50912db 406 hit[1] = fSPDdetzcentre[3]-0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 407 if (TMath::Abs(fgLayers[i].GetDetector(detector).GetZmax()-hit[1])<zwindow)
408 fgLayers[i].InsertCluster(new AliITSRecPoint(lab,hit,info,local));
e43c066c 409 }
6518a6c5 410 } // "virtual" clusters in SPD
e43c066c 411
412 }
413 //
414 fgLayers[i].ResetRoad(); //road defined by the cluster density
415 fgLayers[i].SortClusters();
416 }
417
4fa7f7d1 418 // check whether we have to skip some layers
419 SetForceSkippingOfLayer();
420
e43c066c 421 return 0;
422}
44347160 423//------------------------------------------------------------------------
e43c066c 424void AliITStrackerMI::UnloadClusters() {
425 //--------------------------------------------------------------------
426 //This function unloads ITS clusters
427 //--------------------------------------------------------------------
e50912db 428 for (Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) fgLayers[i].ResetClusters();
e43c066c 429}
44347160 430//------------------------------------------------------------------------
23197852 431void AliITStrackerMI::FillClusterArray(TObjArray* array) const {
432 //--------------------------------------------------------------------
433 // Publishes all pointers to clusters known to the tracker into the
434 // passed object array.
435 // The ownership is not transfered - the caller is not expected to delete
436 // the clusters.
437 //--------------------------------------------------------------------
438
439 for(Int_t i=0; i<AliITSgeomTGeo::GetNLayers(); i++) {
440 for(Int_t icl=0; icl<fgLayers[i].GetNumberOfClusters(); icl++) {
441 AliCluster *cl = (AliCluster*)fgLayers[i].GetCluster(icl);
442 array->AddLast(cl);
443 }
444 }
445
446 return;
447}
448//------------------------------------------------------------------------
44396017 449Int_t AliITStrackerMI::CorrectForTPCtoITSDeadZoneMaterial(AliITStrackMI *t) {
e43c066c 450 //--------------------------------------------------------------------
451 // Correction for the material between the TPC and the ITS
e43c066c 452 //--------------------------------------------------------------------
e50912db 453 if (t->GetX() > AliITSRecoParam::Getriw()) { // inward direction
454 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw(),1)) return 0;// TPC inner wall
455 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
456 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
457 } else if (t->GetX() < AliITSRecoParam::Getrs()) { // outward direction
458 if (!t->PropagateToTGeo(AliITSRecoParam::Getrs(),1)) return 0;// ITS screen
459 if (!t->PropagateToTGeo(AliITSRecoParam::Getrcd(),1)) return 0;// TPC central drum
460 if (!t->PropagateToTGeo(AliITSRecoParam::Getriw()+0.001,1)) return 0;// TPC inner wall
e43c066c 461 } else {
44396017 462 printf("CorrectForTPCtoITSDeadZoneMaterial: Track is already in the dead zone !\n");
e50912db 463 return 0;
e43c066c 464 }
465
e50912db 466 return 1;
e43c066c 467}
44347160 468//------------------------------------------------------------------------
af885e0f 469Int_t AliITStrackerMI::Clusters2Tracks(AliESDEvent *event) {
e43c066c 470 //--------------------------------------------------------------------
471 // This functions reconstructs ITS tracks
472 // The clusters must be already loaded !
473 //--------------------------------------------------------------------
fddf8459 474
4fa7f7d1 475 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
fddf8459 476
e50912db 477 fTrackingPhase="Clusters2Tracks";
478
e43c066c 479 TObjArray itsTracks(15000);
628e7bb0 480 fOriginal.Clear();
81e97e0d 481 fEsd = event; // store pointer to the esd
afd25725 482
9a5326b1 483 // temporary (for cosmics)
484 if(event->GetVertex()) {
485 TString title = event->GetVertex()->GetTitle();
486 if(title.Contains("cosmics")) {
487 Double_t xyz[3]={GetX(),GetY(),GetZ()};
488 Double_t exyz[3]={0.1,0.1,0.1};
489 SetVertex(xyz,exyz);
490 }
491 }
492 // temporary
75a74b11 493 Int_t noesd = 0;
e43c066c 494 {/* Read ESD tracks */
afd25725 495 Double_t pimass = TDatabasePDG::Instance()->GetParticle(211)->Mass();
e43c066c 496 Int_t nentr=event->GetNumberOfTracks();
75a74b11 497 noesd=nentr;
498 // Info("Clusters2Tracks", "Number of ESD tracks: %d\n", nentr);
e43c066c 499 while (nentr--) {
500 AliESDtrack *esd=event->GetTrack(nentr);
4187a601 501 // ---- for debugging:
502 //if(TMath::Abs(esd->GetX()-83.65)<0.1) { FILE *f=fopen("tpc.dat","a"); fprintf(f,"%f %f %f %f %f %f\n",(Float_t)event->GetEventNumberInFile(),(Float_t)TMath::Abs(esd->GetLabel()),(Float_t)esd->GetX(),(Float_t)esd->GetY(),(Float_t)esd->GetZ(),(Float_t)esd->Pt()); fclose(f); }
e43c066c 503
504 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0) continue;
505 if (esd->GetStatus()&AliESDtrack::kTPCout) continue;
506 if (esd->GetStatus()&AliESDtrack::kITSin) continue;
51ad6848 507 if (esd->GetKinkIndex(0)>0) continue; //kink daughter
15dd636f 508 AliITStrackMI *t=0;
e43c066c 509 try {
15dd636f 510 t=new AliITStrackMI(*esd);
e43c066c 511 } catch (const Char_t *msg) {
628e7bb0 512 //Warning("Clusters2Tracks",msg);
e43c066c 513 delete t;
514 continue;
515 }
b9671574 516 t->GetDZ(GetX(),GetY(),GetZ(),t->GetDP()); //I.B.
517 Double_t vdist = TMath::Sqrt(t->GetD(0)*t->GetD(0)+t->GetD(1)*t->GetD(1));
6518a6c5 518
519
afd25725 520 // look at the ESD mass hypothesys !
521 if (t->GetMass()<0.9*pimass) t->SetMass(pimass);
e43c066c 522 // write expected q
b9671574 523 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 524
afd25725 525 if (esd->GetV0Index(0)>0 && t->GetD(0)<AliITSReconstructor::GetRecoParam()->GetMaxDforV0dghtrForProlongation()){
81e97e0d 526 //track - can be V0 according to TPC
afd25725 527 } else {
528 if (TMath::Abs(t->GetD(0))>AliITSReconstructor::GetRecoParam()->GetMaxDForProlongation()) {
81e97e0d 529 delete t;
530 continue;
e50912db 531 }
afd25725 532 if (TMath::Abs(vdist)>AliITSReconstructor::GetRecoParam()->GetMaxDZForProlongation()) {
81e97e0d 533 delete t;
534 continue;
535 }
6c23ffed 536 if (t->Pt()<AliITSReconstructor::GetRecoParam()->GetMinPtForProlongation()) {
81e97e0d 537 delete t;
538 continue;
539 }
e50912db 540 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
81e97e0d 541 delete t;
542 continue;
543 }
e43c066c 544 }
b9671574 545 t->SetReconstructed(kFALSE);
e43c066c 546 itsTracks.AddLast(t);
628e7bb0 547 fOriginal.AddLast(t);
e43c066c 548 }
549 } /* End Read ESD tracks */
550
551 itsTracks.Sort();
628e7bb0 552 fOriginal.Sort();
e43c066c 553 Int_t nentr=itsTracks.GetEntriesFast();
554 fTrackHypothesys.Expand(nentr);
81e97e0d 555 fBestHypothesys.Expand(nentr);
afd25725 556 MakeCoefficients(nentr);
513ab112 557 if(fUseTGeo==3 || fUseTGeo==4) MakeTrksMaterialLUT(event->GetNumberOfTracks());
e43c066c 558 Int_t ntrk=0;
afd25725 559 // THE TWO TRACKING PASSES
e43c066c 560 for (fPass=0; fPass<2; fPass++) {
561 Int_t &constraint=fConstraint[fPass]; if (constraint<0) continue;
e50912db 562 for (fCurrentEsdTrack=0; fCurrentEsdTrack<nentr; fCurrentEsdTrack++) {
e50912db 563 AliITStrackMI *t=(AliITStrackMI*)itsTracks.UncheckedAt(fCurrentEsdTrack);
e43c066c 564 if (t==0) continue; //this track has been already tracked
1c97ce2f 565 //cout<<"========== "<<fPass<<" "<<fCurrentEsdTrack<<" =========\n";
b9671574 566 if (t->GetReconstructed()&&(t->GetNUsed()<1.5)) continue; //this track was already "succesfully" reconstructed
791f9a2a 567 Float_t dz[2]; t->GetDZ(GetX(),GetY(),GetZ(),dz); //I.B.
afd25725 568 if (fConstraint[fPass]) {
569 if (TMath::Abs(dz[0])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint() ||
570 TMath::Abs(dz[1])>AliITSReconstructor::GetRecoParam()->GetMaxDZToUseConstraint()) continue;
571 }
e43c066c 572
573 Int_t tpcLabel=t->GetLabel(); //save the TPC track label
4187a601 574 AliDebug(2,Form("LABEL %d pass %d",tpcLabel,fPass));
e43c066c 575 fI = 6;
576 ResetTrackToFollow(*t);
577 ResetBestTrack();
6518a6c5 578
e50912db 579 FollowProlongationTree(t,fCurrentEsdTrack,fConstraint[fPass]);
1c97ce2f 580
e43c066c 581
582 SortTrackHypothesys(fCurrentEsdTrack,20,0); //MI change
583 //
ae00569a 584 AliITStrackMI *besttrack = GetBestHypothesys(fCurrentEsdTrack,t,15);
e43c066c 585 if (!besttrack) continue;
586 besttrack->SetLabel(tpcLabel);
587 // besttrack->CookdEdx();
588 CookdEdx(besttrack);
b9671574 589 besttrack->SetFakeRatio(1.);
e43c066c 590 CookLabel(besttrack,0.); //For comparison only
e43c066c 591 UpdateESDtrack(besttrack,AliESDtrack::kITSin);
628e7bb0 592
628e7bb0 593 if (fConstraint[fPass]&&(!besttrack->IsGoldPrimary())) continue; //to be tracked also without vertex constrain
594
b9671574 595 t->SetReconstructed(kTRUE);
1c97ce2f 596 ntrk++;
4187a601 597 AliDebug(2,Form("TRACK! (label %d) ncls %d",besttrack->GetLabel(),besttrack->GetNumberOfClusters()));
e43c066c 598 }
599 GetBestHypothesysMIP(itsTracks);
afd25725 600 } // end loop on the two tracking passes
e43c066c 601
cd90f0a2 602 if(event->GetNumberOfV0s()>0) AliITSV0Finder::UpdateTPCV0(event,this);
603 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::FindV02(event,this);
628e7bb0 604 fAfterV0 = kTRUE;
628e7bb0 605 //
e43c066c 606 itsTracks.Delete();
607 //
608 Int_t entries = fTrackHypothesys.GetEntriesFast();
e50912db 609 for (Int_t ientry=0; ientry<entries; ientry++) {
e43c066c 610 TObjArray * array =(TObjArray*)fTrackHypothesys.UncheckedAt(ientry);
611 if (array) array->Delete();
612 delete fTrackHypothesys.RemoveAt(ientry);
613 }
614
615 fTrackHypothesys.Delete();
81e97e0d 616 fBestHypothesys.Delete();
628e7bb0 617 fOriginal.Clear();
afd25725 618 delete [] fCoefficients;
619 fCoefficients=0;
e50912db 620 DeleteTrksMaterialLUT();
621
75a74b11 622 AliInfo(Form("Number of prolonged tracks: %d out of %d ESD tracks",ntrk,noesd));
e50912db 623
624 fTrackingPhase="Default";
628e7bb0 625
e43c066c 626 return 0;
627}
44347160 628//------------------------------------------------------------------------
af885e0f 629Int_t AliITStrackerMI::PropagateBack(AliESDEvent *event) {
e43c066c 630 //--------------------------------------------------------------------
631 // This functions propagates reconstructed ITS tracks back
632 // The clusters must be loaded !
633 //--------------------------------------------------------------------
e50912db 634 fTrackingPhase="PropagateBack";
e43c066c 635 Int_t nentr=event->GetNumberOfTracks();
75a74b11 636 // Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
e43c066c 637
638 Int_t ntrk=0;
639 for (Int_t i=0; i<nentr; i++) {
640 AliESDtrack *esd=event->GetTrack(i);
641
642 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
643 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
644
15dd636f 645 AliITStrackMI *t=0;
e43c066c 646 try {
15dd636f 647 t=new AliITStrackMI(*esd);
e43c066c 648 } catch (const Char_t *msg) {
628e7bb0 649 //Warning("PropagateBack",msg);
e43c066c 650 delete t;
651 continue;
652 }
b9671574 653 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e43c066c 654
655 ResetTrackToFollow(*t);
4fa7f7d1 656
67178f34 657 /*
9a5326b1 658 // propagate to vertex [SR, GSI 17.02.2003]
e43c066c 659 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
e50912db 660 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
661 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
662 fTrackToFollow.StartTimeIntegral();
663 // from vertex to outside pipe
664 CorrectForPipeMaterial(&fTrackToFollow,"outward");
67178f34 665 }*/
666 // Start time integral and add distance from current position to vertex
667 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
668 fTrackToFollow.GetXYZ(xyzTrk);
669 Double_t dst2 = 0.;
670 for (Int_t icoord=0; icoord<3; icoord++) {
671 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
672 dst2 += di*di;
e43c066c 673 }
67178f34 674 fTrackToFollow.StartTimeIntegral();
675 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
e43c066c 676
6c94f330 677 fTrackToFollow.ResetCovariance(10.); fTrackToFollow.ResetClusters();
e50912db 678 if (RefitAt(AliITSRecoParam::GetrInsideITSscreen(),&fTrackToFollow,t)) {
679 if (!CorrectForTPCtoITSDeadZoneMaterial(&fTrackToFollow)) {
e43c066c 680 delete t;
681 continue;
682 }
683 fTrackToFollow.SetLabel(t->GetLabel());
684 //fTrackToFollow.CookdEdx();
685 CookLabel(&fTrackToFollow,0.); //For comparison only
686 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
687 //UseClusters(&fTrackToFollow);
688 ntrk++;
689 }
690 delete t;
691 }
692
75a74b11 693 AliInfo(Form("Number of back propagated ITS tracks: %d out of %d ESD tracks",ntrk,nentr));
e43c066c 694
e50912db 695 fTrackingPhase="Default";
696
e43c066c 697 return 0;
698}
44347160 699//------------------------------------------------------------------------
af885e0f 700Int_t AliITStrackerMI::RefitInward(AliESDEvent *event) {
e43c066c 701 //--------------------------------------------------------------------
702 // This functions refits ITS tracks using the
703 // "inward propagated" TPC tracks
704 // The clusters must be loaded !
705 //--------------------------------------------------------------------
e50912db 706 fTrackingPhase="RefitInward";
44396017 707
cd90f0a2 708 if(AliITSReconstructor::GetRecoParam()->GetFindV0s()) AliITSV0Finder::RefitV02(event,this);
44396017 709
e43c066c 710 Int_t nentr=event->GetNumberOfTracks();
75a74b11 711 // Info("RefitInward", "Number of ESD tracks: %d\n", nentr);
e43c066c 712
713 Int_t ntrk=0;
714 for (Int_t i=0; i<nentr; i++) {
715 AliESDtrack *esd=event->GetTrack(i);
716
717 if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
718 if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
719 if (esd->GetStatus()&AliESDtrack::kTPCout)
720 if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
721
15dd636f 722 AliITStrackMI *t=0;
e43c066c 723 try {
15dd636f 724 t=new AliITStrackMI(*esd);
e43c066c 725 } catch (const Char_t *msg) {
628e7bb0 726 //Warning("RefitInward",msg);
e43c066c 727 delete t;
728 continue;
729 }
b9671574 730 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
e50912db 731 if (!CorrectForTPCtoITSDeadZoneMaterial(t)) {
e43c066c 732 delete t;
733 continue;
734 }
735
736 ResetTrackToFollow(*t);
737 fTrackToFollow.ResetClusters();
738
739 if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
6c94f330 740 fTrackToFollow.ResetCovariance(10.);
e43c066c 741
742 //Refitting...
58e8dc31 743 Bool_t pe=(AliITSReconstructor::GetRecoParam()->GetComputePlaneEff() &&
744 AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()>=0);
1a64bda6 745
4187a601 746 AliDebug(2,Form("Refit LABEL %d %d",t->GetLabel(),t->GetNumberOfClusters()));
7167ae53 747 if (RefitAt(AliITSRecoParam::GetrInsideSPD1(),&fTrackToFollow,t,kTRUE,pe)) {
4187a601 748 AliDebug(2," refit OK");
e43c066c 749 fTrackToFollow.SetLabel(t->GetLabel());
750 // fTrackToFollow.CookdEdx();
751 CookdEdx(&fTrackToFollow);
752
753 CookLabel(&fTrackToFollow,0.0); //For comparison only
754
9a5326b1 755 //The beam pipe
e50912db 756 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
ae00569a 757 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
9a5326b1 758 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
ae00569a 759 //printf(" %d\n",esdTrack->GetITSModuleIndex(0));
760 //esdTrack->UpdateTrackParams(&fTrackToFollow,AliESDtrack::kITSrefit); //original line
f7a1cc68 761 Double_t r[3]={0.,0.,0.};
9a5326b1 762 Double_t maxD=3.;
763 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
764 ntrk++;
e43c066c 765 }
766 }
767 delete t;
768 }
769
75a74b11 770 AliInfo(Form("Number of refitted tracks: %d out of %d ESD tracks",ntrk,nentr));
e43c066c 771
e50912db 772 fTrackingPhase="Default";
773
e43c066c 774 return 0;
775}
44347160 776//------------------------------------------------------------------------
e43c066c 777AliCluster *AliITStrackerMI::GetCluster(Int_t index) const {
778 //--------------------------------------------------------------------
779 // Return pointer to a given cluster
780 //--------------------------------------------------------------------
781 Int_t l=(index & 0xf0000000) >> 28;
782 Int_t c=(index & 0x0fffffff) >> 00;
783 return fgLayers[l].GetCluster(c);
784}
9a5326b1 785//------------------------------------------------------------------------
df29e9a4 786Bool_t AliITStrackerMI::GetTrackPoint(Int_t index, AliTrackPoint& p) const {
9a5326b1 787 //--------------------------------------------------------------------
df29e9a4 788 // Get track space point with index i
9a5326b1 789 //--------------------------------------------------------------------
60066577 790
78b03929 791 Int_t l=(index & 0xf0000000) >> 28;
792 Int_t c=(index & 0x0fffffff) >> 00;
00a7cc50 793 AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
df29e9a4 794 Int_t idet = cl->GetDetectorIndex();
4e65ff9e 795
60066577 796 Float_t xyz[3];
797 Float_t cov[6];
798 cl->GetGlobalXYZ(xyz);
799 cl->GetGlobalCov(cov);
800 p.SetXYZ(xyz, cov);
be77c8c9 801 p.SetCharge(cl->GetQ());
ebbcf1ea 802 p.SetDriftTime(cl->GetDriftTime());
b7bcc8ed 803 p.SetChargeRatio(cl->GetChargeRatio());
e3901fd8 804 p.SetClusterType(cl->GetClusterType());
ae079791 805 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
df29e9a4 806 switch (l) {
807 case 0:
ae079791 808 iLayer = AliGeomManager::kSPD1;
df29e9a4 809 break;
810 case 1:
ae079791 811 iLayer = AliGeomManager::kSPD2;
df29e9a4 812 break;
813 case 2:
ae079791 814 iLayer = AliGeomManager::kSDD1;
df29e9a4 815 break;
816 case 3:
ae079791 817 iLayer = AliGeomManager::kSDD2;
9a5326b1 818 break;
819 case 4:
820 iLayer = AliGeomManager::kSSD1;
821 break;
822 case 5:
823 iLayer = AliGeomManager::kSSD2;
824 break;
825 default:
826 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
827 break;
828 };
829 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
830 p.SetVolumeID((UShort_t)volid);
831 return kTRUE;
832}
833//------------------------------------------------------------------------
834Bool_t AliITStrackerMI::GetTrackPointTrackingError(Int_t index,
835 AliTrackPoint& p, const AliESDtrack *t) {
836 //--------------------------------------------------------------------
837 // Get track space point with index i
838 // (assign error estimated during the tracking)
839 //--------------------------------------------------------------------
840
841 Int_t l=(index & 0xf0000000) >> 28;
842 Int_t c=(index & 0x0fffffff) >> 00;
843 const AliITSRecPoint *cl = fgLayers[l].GetCluster(c);
844 Int_t idet = cl->GetDetectorIndex();
4187a601 845
9a5326b1 846 const AliITSdetector &det=fgLayers[l].GetDetector(idet);
847
848 // tgphi and tglambda of the track in tracking frame with alpha=det.GetPhi
849 Float_t detxy[2];
850 detxy[0] = det.GetR()*TMath::Cos(det.GetPhi());
851 detxy[1] = det.GetR()*TMath::Sin(det.GetPhi());
852 Double_t alpha = t->GetAlpha();
853 Double_t xdetintrackframe = detxy[0]*TMath::Cos(alpha)+detxy[1]*TMath::Sin(alpha);
9be1d1c7 854 Float_t phi = TMath::ASin(t->GetSnpAt(xdetintrackframe,GetBz()));
9a5326b1 855 phi += alpha-det.GetPhi();
856 Float_t tgphi = TMath::Tan(phi);
857
858 Float_t tgl = t->GetTgl(); // tgl about const along track
859 Float_t expQ = TMath::Max(0.8*t->GetTPCsignal(),30.);
860
d9ead1a0 861 Float_t errtrky,errtrkz,covyz;
8c139cf3 862 Bool_t addMisalErr=kFALSE;
d9ead1a0 863 AliITSClusterParam::GetError(l,cl,tgl,tgphi,expQ,errtrky,errtrkz,covyz,addMisalErr);
9a5326b1 864
865 Float_t xyz[3];
866 Float_t cov[6];
867 cl->GetGlobalXYZ(xyz);
868 // cl->GetGlobalCov(cov);
869 Float_t pos[3] = {0.,0.,0.};
d9ead1a0 870 AliCluster tmpcl((UShort_t)cl->GetVolumeId(),pos[0],pos[1],pos[2],errtrky*errtrky,errtrkz*errtrkz,covyz);
9a5326b1 871 tmpcl.GetGlobalCov(cov);
872
873 p.SetXYZ(xyz, cov);
be77c8c9 874 p.SetCharge(cl->GetQ());
ebbcf1ea 875 p.SetDriftTime(cl->GetDriftTime());
b7bcc8ed 876 p.SetChargeRatio(cl->GetChargeRatio());
e3901fd8 877 p.SetClusterType(cl->GetClusterType());
9a5326b1 878
879 AliGeomManager::ELayerID iLayer = AliGeomManager::kInvalidLayer;
880 switch (l) {
881 case 0:
882 iLayer = AliGeomManager::kSPD1;
883 break;
884 case 1:
885 iLayer = AliGeomManager::kSPD2;
886 break;
887 case 2:
888 iLayer = AliGeomManager::kSDD1;
889 break;
890 case 3:
891 iLayer = AliGeomManager::kSDD2;
df29e9a4 892 break;
893 case 4:
ae079791 894 iLayer = AliGeomManager::kSSD1;
df29e9a4 895 break;
896 case 5:
ae079791 897 iLayer = AliGeomManager::kSSD2;
df29e9a4 898 break;
899 default:
900 AliWarning(Form("Wrong layer index in ITS (%d) !",l));
901 break;
902 };
ae079791 903 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,idet);
4187a601 904
df29e9a4 905 p.SetVolumeID((UShort_t)volid);
906 return kTRUE;
907}
44347160 908//------------------------------------------------------------------------
81e97e0d 909void AliITStrackerMI::FollowProlongationTree(AliITStrackMI * otrack, Int_t esdindex, Bool_t constrain)
e43c066c 910{
911 //--------------------------------------------------------------------
912 // Follow prolongation tree
913 //--------------------------------------------------------------------
81e97e0d 914 //
afd25725 915 Double_t xyzVtx[]={GetX(),GetY(),GetZ()};
916 Double_t ersVtx[]={GetSigmaX(),GetSigmaY(),GetSigmaZ()};
917
2755f080 918
b9671574 919 AliESDtrack * esd = otrack->GetESDtrack();
afd25725 920 if (esd->GetV0Index(0)>0) {
81e97e0d 921 // TEMPORARY SOLLUTION: map V0 indexes to point to proper track
afd25725 922 // mapping of ESD track is different as ITS track in Containers
81e97e0d 923 // Need something more stable
44347160 924 // Indexes are set back again to the ESD track indexes in UpdateTPCV0
81e97e0d 925 for (Int_t i=0;i<3;i++){
926 Int_t index = esd->GetV0Index(i);
927 if (index==0) break;
d6a49f20 928 AliESDv0 * vertex = fEsd->GetV0(index);
81e97e0d 929 if (vertex->GetStatus()<0) continue; // rejected V0
930 //
afd25725 931 if (esd->GetSign()>0) {
932 vertex->SetIndex(0,esdindex);
933 } else {
934 vertex->SetIndex(1,esdindex);
935 }
81e97e0d 936 }
937 }
938 TObjArray *bestarray = (TObjArray*)fBestHypothesys.At(esdindex);
939 if (!bestarray){
940 bestarray = new TObjArray(5);
941 fBestHypothesys.AddAt(bestarray,esdindex);
942 }
e43c066c 943
81e97e0d 944 //
e43c066c 945 //setup tree of the prolongations
946 //
15dd636f 947 static AliITStrackMI tracks[7][100];
948 AliITStrackMI *currenttrack;
949 static AliITStrackMI currenttrack1;
950 static AliITStrackMI currenttrack2;
951 static AliITStrackMI backuptrack;
e43c066c 952 Int_t ntracks[7];
953 Int_t nindexes[7][100];
954 Float_t normalizedchi2[100];
955 for (Int_t ilayer=0;ilayer<6;ilayer++) ntracks[ilayer]=0;
b9671574 956 otrack->SetNSkipped(0);
15dd636f 957 new (&(tracks[6][0])) AliITStrackMI(*otrack);
e43c066c 958 ntracks[6]=1;
81e97e0d 959 for (Int_t i=0;i<7;i++) nindexes[i][0]=0;
ae00569a 960 Int_t modstatus = 1; // found
961 Float_t xloc,zloc;
e43c066c 962 //
963 //
964 // follow prolongations
e50912db 965 for (Int_t ilayer=5; ilayer>=0; ilayer--) {
4187a601 966 AliDebug(2,Form("FollowProlongationTree: layer %d",ilayer));
2755f080 967 fI = ilayer;
e43c066c 968 //
2755f080 969 AliITSlayer &layer=fgLayers[ilayer];
970 Double_t r = layer.GetR();
e43c066c 971 ntracks[ilayer]=0;
972 //
973 //
2755f080 974 Int_t nskipped=0;
e43c066c 975 Float_t nused =0;
e50912db 976 for (Int_t itrack =0; itrack<ntracks[ilayer+1]; itrack++) {
e43c066c 977 //set current track
978 if (ntracks[ilayer]>=100) break;
b9671574 979 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0) nskipped++;
980 if (tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2.) nused++;
e43c066c 981 if (ntracks[ilayer]>15+ilayer){
b9671574 982 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNSkipped()>0 && nskipped>4+ilayer) continue;
983 if (itrack>1&&tracks[ilayer+1][nindexes[ilayer+1][itrack]].GetNUsed()>2. && nused>3) continue;
e43c066c 984 }
985
15dd636f 986 new(&currenttrack1) AliITStrackMI(tracks[ilayer+1][nindexes[ilayer+1][itrack]]);
44347160 987
afd25725 988 // material between SSD and SDD, SDD and SPD
e50912db 989 if (ilayer==3)
990 if(!CorrectForShieldMaterial(&currenttrack1,"SDD","inward")) continue;
991 if (ilayer==1)
992 if(!CorrectForShieldMaterial(&currenttrack1,"SPD","inward")) continue;
8602c008 993
2755f080 994 // detector number
8602c008 995 Double_t phi,z;
996 if (!currenttrack1.GetPhiZat(r,phi,z)) continue;
e43c066c 997 Int_t idet=layer.FindDetectorIndex(phi,z);
e50912db 998
999 Double_t trackGlobXYZ1[3];
d1181f10 1000 if (!currenttrack1.GetXYZ(trackGlobXYZ1)) continue;
e50912db 1001
2755f080 1002 // Get the budget to the primary vertex for the current track being prolonged
1003 Double_t budgetToPrimVertex = GetEffectiveThickness();
1004
1005 // check if we allow a prolongation without point
6518a6c5 1006 Int_t skip = CheckSkipLayer(&currenttrack1,ilayer,idet);
2755f080 1007 if (skip) {
1008 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
6518a6c5 1009 // propagate to the layer radius
d1181f10 1010 Double_t xToGo; if (!vtrack->GetLocalXat(r,xToGo)) continue;
9be1d1c7 1011 if(!vtrack->Propagate(xToGo)) continue;
2755f080 1012 // apply correction for material of the current layer
1013 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
1014 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
f8720bda 1015 vtrack->SetDeadZoneProbability(ilayer,1.); // no penalty for missing cluster
9fd412a8 1016 vtrack->SetClIndex(ilayer,-1);
ae00569a 1017 modstatus = (skip==1 ? 3 : 4); // skipped : out in z
d1181f10 1018 if(LocalModuleCoord(ilayer,idet,vtrack,xloc,zloc)) { // local module coords
1019 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
1020 }
2755f080 1021 if(constrain) vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1022 ntracks[ilayer]++;
6518a6c5 1023 continue;
2755f080 1024 }
1025
1026 // track outside layer acceptance in z
1027 if (idet<0) continue;
1028
1029 //propagate to the intersection with the detector plane
1030 const AliITSdetector &det=layer.GetDetector(idet);
1031 new(&currenttrack2) AliITStrackMI(currenttrack1);
44347160 1032 if (!currenttrack1.Propagate(det.GetPhi(),det.GetR())) continue;
d1181f10 1033 if (!currenttrack2.Propagate(det.GetPhi(),det.GetR())) continue;
e43c066c 1034 currenttrack1.SetDetectorIndex(idet);
1035 currenttrack2.SetDetectorIndex(idet);
d1181f10 1036 if(!LocalModuleCoord(ilayer,idet,&currenttrack1,xloc,zloc)) continue; // local module coords
6518a6c5 1037
afd25725 1038 //***************
1c97ce2f 1039 // DEFINITION OF SEARCH ROAD AND CLUSTERS SELECTION
e43c066c 1040 //
2755f080 1041 // road in global (rphi,z) [i.e. in tracking ref. system]
1c97ce2f 1042 Double_t zmin,zmax,ymin,ymax;
1043 if (!ComputeRoad(&currenttrack1,ilayer,idet,zmin,zmax,ymin,ymax)) continue;
2755f080 1044
afd25725 1045 // select clusters in road
e43c066c 1046 layer.SelectClusters(zmin,zmax,ymin,ymax);
afd25725 1047 //********************
44347160 1048
afd25725 1049 // Define criteria for track-cluster association
44347160 1050 Double_t msz = currenttrack1.GetSigmaZ2() +
1051 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1052 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1053 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer);
1054 Double_t msy = currenttrack1.GetSigmaY2() +
1055 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1056 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1057 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer);
1058 if (constrain) {
1059 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZC();
1060 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYC();
1061 } else {
1062 msz *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadZNonC();
1063 msy *= AliITSReconstructor::GetRecoParam()->GetNSigma2RoadYNonC();
1064 }
1065 msz = 1./msz; // 1/RoadZ^2
1066 msy = 1./msy; // 1/RoadY^2
1c97ce2f 1067
e43c066c 1068 //
e43c066c 1069 //
afd25725 1070 // LOOP OVER ALL POSSIBLE TRACK PROLONGATIONS ON THIS LAYER
e43c066c 1071 //
afd25725 1072 const AliITSRecPoint *cl=0;
1073 Int_t clidx=-1;
1074 Double_t chi2trkcl=AliITSReconstructor::GetRecoParam()->GetMaxChi2(); // init with big value
6518a6c5 1075 Bool_t deadzoneSPD=kFALSE;
e43c066c 1076 currenttrack = &currenttrack1;
6518a6c5 1077
ae00569a 1078 // check if the road contains a dead zone
23197852 1079 Bool_t noClusters = kFALSE;
1080 if (!layer.GetNextCluster(clidx,kTRUE)) noClusters=kTRUE;
4187a601 1081 if (noClusters) AliDebug(2,"no clusters in road");
1c97ce2f 1082 Double_t dz=0.5*(zmax-zmin);
1083 Double_t dy=0.5*(ymax-ymin);
1084 Int_t dead = CheckDeadZone(&currenttrack1,ilayer,idet,dz,dy,noClusters);
4187a601 1085 if(dead) AliDebug(2,Form("DEAD (%d)\n",dead));
ae00569a 1086 // create a prolongation without clusters (check also if there are no clusters in the road)
1087 if (dead ||
23197852 1088 (noClusters &&
ae00569a 1089 AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad())) {
6518a6c5 1090 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
9fd412a8 1091 updatetrack->SetClIndex(ilayer,-1);
ae00569a 1092 if (dead==0) {
1093 modstatus = 5; // no cls in road
1094 } else if (dead==1) {
1095 modstatus = 7; // holes in z in SPD
f8720bda 1096 } else if (dead==2 || dead==3 || dead==4) {
ae00569a 1097 modstatus = 2; // dead from OCDB
1098 }
1099 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
6518a6c5 1100 // apply correction for material of the current layer
1101 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1102 if (constrain) { // apply vertex constrain
1103 updatetrack->SetConstrain(constrain);
1104 Bool_t isPrim = kTRUE;
1105 if (ilayer<4) { // check that it's close to the vertex
1106 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
1107 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1108 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1109 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1110 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
1111 }
1112 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
1113 }
f8720bda 1114 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
ae00569a 1115 if (dead) {
ae00569a 1116 if (dead==1) { // dead zone at z=0,+-7cm in SPD
f8720bda 1117 updatetrack->SetDeadZoneProbability(ilayer,GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
ae00569a 1118 deadzoneSPD=kTRUE;
f8720bda 1119 } else if (dead==2 || dead==3) { // dead module or chip from OCDB
1120 updatetrack->SetDeadZoneProbability(ilayer,1.);
1121 } else if (dead==4) { // at least a single dead channel from OCDB
1122 updatetrack->SetDeadZoneProbability(ilayer,0.);
1123 }
6518a6c5 1124 }
1125 ntracks[ilayer]++;
1126 }
1127
ae00569a 1128 clidx=-1;
6518a6c5 1129 // loop over clusters in the road
afd25725 1130 while ((cl=layer.GetNextCluster(clidx))!=0) {
e43c066c 1131 if (ntracks[ilayer]>95) break; //space for skipped clusters
afd25725 1132 Bool_t changedet =kFALSE;
6518a6c5 1133 if (cl->GetQ()==0 && deadzoneSPD==kTRUE) continue;
a5d0fae6 1134 Int_t idetc=cl->GetDetectorIndex();
afd25725 1135
a5d0fae6 1136 if (currenttrack->GetDetectorIndex()==idetc) { // track already on the cluster's detector
1c97ce2f 1137 // take into account misalignment (bring track to real detector plane)
1138 Double_t xTrOrig = currenttrack->GetX();
9be1d1c7 1139 if (!currenttrack->Propagate(xTrOrig+cl->GetX())) continue;
afd25725 1140 // a first cut on track-cluster distance
1141 if ( (currenttrack->GetZ()-cl->GetZ())*(currenttrack->GetZ()-cl->GetZ())*msz +
1142 (currenttrack->GetY()-cl->GetY())*(currenttrack->GetY()-cl->GetY())*msy > 1. )
1c97ce2f 1143 { // cluster not associated to track
4187a601 1144 AliDebug(2,"not associated");
1c97ce2f 1145 continue;
1146 }
1147 // bring track back to ideal detector plane
9be1d1c7 1148 if (!currenttrack->Propagate(xTrOrig)) continue;
afd25725 1149 } else { // have to move track to cluster's detector
a5d0fae6 1150 const AliITSdetector &detc=layer.GetDetector(idetc);
afd25725 1151 // a first cut on track-cluster distance
a5d0fae6 1152 Double_t y;
1c97ce2f 1153 if (!currenttrack2.GetProlongationFast(detc.GetPhi(),detc.GetR()+cl->GetX(),y,z)) continue;
afd25725 1154 if ( (z-cl->GetZ())*(z-cl->GetZ())*msz +
1155 (y-cl->GetY())*(y-cl->GetY())*msy > 1. )
44347160 1156 continue; // cluster not associated to track
e43c066c 1157 //
15dd636f 1158 new (&backuptrack) AliITStrackMI(currenttrack2);
afd25725 1159 changedet = kTRUE;
e43c066c 1160 currenttrack =&currenttrack2;
a5d0fae6 1161 if (!currenttrack->Propagate(detc.GetPhi(),detc.GetR())) {
15dd636f 1162 new (currenttrack) AliITStrackMI(backuptrack);
afd25725 1163 changedet = kFALSE;
e43c066c 1164 continue;
1165 }
a5d0fae6 1166 currenttrack->SetDetectorIndex(idetc);
e50912db 1167 // Get again the budget to the primary vertex
1168 // for the current track being prolonged, if had to change detector
1169 //budgetToPrimVertex = GetEffectiveThickness();// not needed at the moment because anyway we take a mean material for this correction
e43c066c 1170 }
1171
afd25725 1172 // calculate track-clusters chi2
1173 chi2trkcl = GetPredictedChi2MI(currenttrack,cl,ilayer);
1174 // chi2 cut
4187a601 1175 AliDebug(2,Form("chi2 %f max %f",chi2trkcl,AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)));
afd25725 1176 if (chi2trkcl < AliITSReconstructor::GetRecoParam()->GetMaxChi2s(ilayer)) {
6518a6c5 1177 if (cl->GetQ()==0) deadzoneSPD=kTRUE; // only 1 prolongation with virtual cluster
e43c066c 1178 if (ntracks[ilayer]>=100) continue;
15dd636f 1179 AliITStrackMI * updatetrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(*currenttrack);
9fd412a8 1180 updatetrack->SetClIndex(ilayer,-1);
afd25725 1181 if (changedet) new (&currenttrack2) AliITStrackMI(backuptrack);
ae00569a 1182
6518a6c5 1183 if (cl->GetQ()!=0) { // real cluster
1c97ce2f 1184 if (!UpdateMI(updatetrack,cl,chi2trkcl,(ilayer<<28)+clidx)) {
4187a601 1185 AliDebug(2,"update failed");
1c97ce2f 1186 continue;
1187 }
09cf9d66 1188 updatetrack->SetSampledEdx(cl->GetQ(),ilayer-2);
ae00569a 1189 modstatus = 1; // found
6518a6c5 1190 } else { // virtual cluster in dead zone
b9671574 1191 updatetrack->SetNDeadZone(updatetrack->GetNDeadZone()+1);
f8720bda 1192 updatetrack->SetDeadZoneProbability(ilayer,GetSPDDeadZoneProbability(updatetrack->GetZ(),TMath::Sqrt(updatetrack->GetSigmaZ2())));
ae00569a 1193 modstatus = 7; // holes in z in SPD
1194 }
1195
1196 if (changedet) {
1197 Float_t xlocnewdet,zlocnewdet;
d1181f10 1198 if(LocalModuleCoord(ilayer,idet,updatetrack,xlocnewdet,zlocnewdet)) { // local module coords
1199 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xlocnewdet,zlocnewdet);
1200 }
ae00569a 1201 } else {
1202 updatetrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
e43c066c 1203 }
afd25725 1204 if (cl->IsUsed()) updatetrack->IncrementNUsed();
1205
1206 // apply correction for material of the current layer
e50912db 1207 CorrectForLayerMaterial(updatetrack,ilayer,trackGlobXYZ1,"inward");
1208
afd25725 1209 if (constrain) { // apply vertex constrain
b9671574 1210 updatetrack->SetConstrain(constrain);
e43c066c 1211 Bool_t isPrim = kTRUE;
afd25725 1212 if (ilayer<4) { // check that it's close to the vertex
b9671574 1213 updatetrack->GetDZ(GetX(),GetY(),GetZ(),updatetrack->GetDP()); //I.B.
afd25725 1214 if (TMath::Abs(updatetrack->GetD(0)/(1.+ilayer)) > // y
1215 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk() ||
1216 TMath::Abs(updatetrack->GetD(1)/(1.+ilayer)) > // z
1217 AliITSReconstructor::GetRecoParam()->GetMaxDZforPrimTrk()) isPrim=kFALSE;
e43c066c 1218 }
afd25725 1219 if (isPrim) updatetrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
e43c066c 1220 } //apply vertex constrain
1221 ntracks[ilayer]++;
afd25725 1222 } // create new hypothesis
4187a601 1223 else {
1224 AliDebug(2,"chi2 too large");
1225 }
1226
2755f080 1227 } // loop over possible prolongations
1228
1229 // allow one prolongation without clusters
6518a6c5 1230 if (constrain && itrack<=1 && currenttrack1.GetNSkipped()==0 && deadzoneSPD==kFALSE && ntracks[ilayer]<100) {
15dd636f 1231 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
2755f080 1232 // apply correction for material of the current layer
1233 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
9fd412a8 1234 vtrack->SetClIndex(ilayer,-1);
ae00569a 1235 modstatus = 3; // skipped
1236 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
afd25725 1237 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
b9671574 1238 vtrack->IncrementNSkipped();
e43c066c 1239 ntracks[ilayer]++;
1240 }
1d7cd831 1241 /*
2755f080 1242 // allow one prolongation without clusters for tracks with |tgl|>1.1
1243 if (constrain && itrack==0 && TMath::Abs(currenttrack1.GetTgl())>1.1) { //big theta - for low flux
628e7bb0 1244 AliITStrackMI* vtrack = new (&tracks[ilayer][ntracks[ilayer]]) AliITStrackMI(currenttrack1);
2755f080 1245 // apply correction for material of the current layer
1246 CorrectForLayerMaterial(vtrack,ilayer,trackGlobXYZ1,"inward");
9fd412a8 1247 vtrack->SetClIndex(ilayer,-1);
ae00569a 1248 modstatus = 3; // skipped
1249 vtrack->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
afd25725 1250 vtrack->Improve(budgetToPrimVertex,xyzVtx,ersVtx);
b9671574 1251 vtrack->SetNDeadZone(vtrack->GetNDeadZone()+1);
628e7bb0 1252 ntracks[ilayer]++;
1253 }
1d7cd831 1254 */
e43c066c 1255
e50912db 1256 } // loop over tracks in layer ilayer+1
afd25725 1257
1258 //loop over track candidates for the current layer
e43c066c 1259 //
1260 //
1261 Int_t accepted=0;
1262
afd25725 1263 Int_t golden=0;
e43c066c 1264 for (Int_t itrack=0;itrack<ntracks[ilayer];itrack++){
1265 normalizedchi2[itrack] = NormalizedChi2(&tracks[ilayer][itrack],ilayer);
afd25725 1266 if (normalizedchi2[itrack] <
1267 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2ForGolden(ilayer)) golden++;
44347160 1268 if (ilayer>4) {
1269 accepted++;
1270 } else {
1271 if (constrain) { // constrain
afd25725 1272 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2C(ilayer)+1)
1273 accepted++;
44347160 1274 } else { // !constrain
afd25725 1275 if (normalizedchi2[itrack]<AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonC(ilayer)+1)
1276 accepted++;
44347160 1277 }
e43c066c 1278 }
1279 }
afd25725 1280 // sort tracks by increasing normalized chi2
1281 TMath::Sort(ntracks[ilayer],normalizedchi2,nindexes[ilayer],kFALSE);
e43c066c 1282 ntracks[ilayer] = TMath::Min(accepted,7+2*ilayer);
afd25725 1283 if (ntracks[ilayer]<golden+2+ilayer) ntracks[ilayer]=TMath::Min(golden+2+ilayer,accepted);
e43c066c 1284 if (ntracks[ilayer]>90) ntracks[ilayer]=90;
afd25725 1285 } // end loop over layers
1286
afd25725 1287
1288 //
1289 // Now select tracks to be kept
1290 //
44347160 1291 Int_t max = constrain ? 20 : 5;
e43c066c 1292
afd25725 1293 // tracks that reach layer 0 (SPD inner)
44347160 1294 for (Int_t i=0; i<TMath::Min(max,ntracks[0]); i++) {
15dd636f 1295 AliITStrackMI & track= tracks[0][nindexes[0][i]];
628e7bb0 1296 if (track.GetNumberOfClusters()<2) continue;
afd25725 1297 if (!constrain && track.GetNormChi2(0) >
6518a6c5 1298 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) {
1299 continue;
1300 }
15dd636f 1301 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1302 }
afd25725 1303
1304 // tracks that reach layer 1 (SPD outer)
628e7bb0 1305 for (Int_t i=0;i<TMath::Min(2,ntracks[1]);i++) {
15dd636f 1306 AliITStrackMI & track= tracks[1][nindexes[1][i]];
e43c066c 1307 if (track.GetNumberOfClusters()<4) continue;
afd25725 1308 if (!constrain && track.GetNormChi2(1) >
1309 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
b9671574 1310 if (constrain) track.IncrementNSkipped();
81e97e0d 1311 if (!constrain) {
b9671574 1312 track.SetD(0,track.GetD(GetX(),GetY()));
afd25725 1313 track.SetNSkipped(track.GetNSkipped()+4./(4.+8.*TMath::Abs(track.GetD(0))));
b9671574 1314 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1315 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 1316 }
1317 }
15dd636f 1318 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1319 }
afd25725 1320
6518a6c5 1321 // tracks that reach layer 2 (SDD inner), only during non-constrained pass
81e97e0d 1322 if (!constrain){
628e7bb0 1323 for (Int_t i=0;i<TMath::Min(2,ntracks[2]);i++) {
15dd636f 1324 AliITStrackMI & track= tracks[2][nindexes[2][i]];
628e7bb0 1325 if (track.GetNumberOfClusters()<3) continue;
afd25725 1326 if (!constrain && track.GetNormChi2(2) >
1327 AliITSReconstructor::GetRecoParam()->GetMaxNormChi2NonCForHypothesis()) continue;
b9671574 1328 if (constrain) track.SetNSkipped(track.GetNSkipped()+2);
81e97e0d 1329 if (!constrain){
b9671574 1330 track.SetD(0,track.GetD(GetX(),GetY()));
afd25725 1331 track.SetNSkipped(track.GetNSkipped()+7./(7.+8.*TMath::Abs(track.GetD(0))));
b9671574 1332 if (track.GetNumberOfClusters()+track.GetNDeadZone()+track.GetNSkipped()>6) {
1333 track.SetNSkipped(6-track.GetNumberOfClusters()+track.GetNDeadZone());
e43c066c 1334 }
1335 }
15dd636f 1336 AddTrackHypothesys(new AliITStrackMI(track), esdindex);
e43c066c 1337 }
1338 }
81e97e0d 1339
afd25725 1340 if (!constrain) {
81e97e0d 1341 //
afd25725 1342 // register best track of each layer - important for V0 finder
81e97e0d 1343 //
1344 for (Int_t ilayer=0;ilayer<5;ilayer++){
1345 if (ntracks[ilayer]==0) continue;
1346 AliITStrackMI & track= tracks[ilayer][nindexes[ilayer][0]];
1347 if (track.GetNumberOfClusters()<1) continue;
1348 CookLabel(&track,0);
1349 bestarray->AddAt(new AliITStrackMI(track),ilayer);
1350 }
1351 }
1352 //
1353 // update TPC V0 information
1354 //
b9671574 1355 if (otrack->GetESDtrack()->GetV0Index(0)>0){
81e97e0d 1356 Float_t fprimvertex[3]={GetX(),GetY(),GetZ()};
1357 for (Int_t i=0;i<3;i++){
b9671574 1358 Int_t index = otrack->GetESDtrack()->GetV0Index(i);
81e97e0d 1359 if (index==0) break;
44347160 1360 AliV0 *vertex = (AliV0*)fEsd->GetV0(index);
81e97e0d 1361 if (vertex->GetStatus()<0) continue; // rejected V0
1362 //
6c94f330 1363 if (otrack->GetSign()>0) {
81e97e0d 1364 vertex->SetIndex(0,esdindex);
1365 }
1366 else{
1367 vertex->SetIndex(1,esdindex);
1368 }
1369 //find nearest layer with track info
b75d63a7 1370 Double_t xrp[3]; vertex->GetXYZ(xrp[0],xrp[1],xrp[2]); //I.B.
1371 Int_t nearestold = GetNearestLayer(xrp); //I.B.
81e97e0d 1372 Int_t nearest = nearestold;
1373 for (Int_t ilayer =nearest;ilayer<8;ilayer++){
1374 if (ntracks[nearest]==0){
1375 nearest = ilayer;
1376 }
1377 }
1378 //
1379 AliITStrackMI & track= tracks[nearest][nindexes[nearest][0]];
1380 if (nearestold<5&&nearest<5){
b9671574 1381 Bool_t accept = track.GetNormChi2(nearest)<10;
81e97e0d 1382 if (accept){
6c94f330 1383 if (track.GetSign()>0) {
b75d63a7 1384 vertex->SetParamP(track);
81e97e0d 1385 vertex->Update(fprimvertex);
44347160 1386 //vertex->SetIndex(0,track.fESDtrack->GetID());
81e97e0d 1387 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1388 }else{
b75d63a7 1389 vertex->SetParamN(track);
81e97e0d 1390 vertex->Update(fprimvertex);
1391 //vertex->SetIndex(1,track.fESDtrack->GetID());
1392 if (track.GetNumberOfClusters()>2) AddTrackHypothesys(new AliITStrackMI(track), esdindex);
1393 }
1394 vertex->SetStatus(vertex->GetStatus()+1);
1395 }else{
44347160 1396 //vertex->SetStatus(-2); // reject V0 - not enough clusters
81e97e0d 1397 }
1398 }
81e97e0d 1399 }
afd25725 1400 }
1401
e43c066c 1402}
44347160 1403//------------------------------------------------------------------------
e43c066c 1404AliITStrackerMI::AliITSlayer & AliITStrackerMI::GetLayer(Int_t layer) const
1405{
1406 //--------------------------------------------------------------------
1407 //
1408 //
1409 return fgLayers[layer];
1410}
44347160 1411//------------------------------------------------------------------------
8221b41b 1412AliITStrackerMI::AliITSlayer::AliITSlayer():
1413fR(0),
1414fPhiOffset(0),
1415fNladders(0),
1416fZOffset(0),
1417fNdetectors(0),
1418fDetectors(0),
1419fN(0),
1420fDy5(0),
1421fDy10(0),
1422fDy20(0),
1423fClustersCs(0),
1424fClusterIndexCs(0),
1425fYcs(0),
1426fZcs(0),
1427fNcs(0),
1428fCurrentSlice(-1),
d9ead1a0 1429fZmin(0),
8221b41b 1430fZmax(0),
1431fYmin(0),
1432fYmax(0),
1433fI(0),
1434fImax(0),
1435fSkip(0),
1436fAccepted(0),
d9ead1a0 1437fRoad(0),
1438fMaxSigmaClY(0),
1439fMaxSigmaClZ(0),
1440fNMaxSigmaCl(3)
1441{
e43c066c 1442 //--------------------------------------------------------------------
1443 //default AliITSlayer constructor
1444 //--------------------------------------------------------------------
e50912db 1445 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1446 fClusterWeight[i]=0;
1447 fClusterTracks[0][i]=-1;
1448 fClusterTracks[1][i]=-1;
1449 fClusterTracks[2][i]=-1;
1450 fClusterTracks[3][i]=-1;
1451 }
1452}
44347160 1453//------------------------------------------------------------------------
e43c066c 1454AliITStrackerMI::AliITSlayer::
8221b41b 1455AliITSlayer(Double_t r,Double_t p,Double_t z,Int_t nl,Int_t nd):
1456fR(r),
1457fPhiOffset(p),
1458fNladders(nl),
1459fZOffset(z),
1460fNdetectors(nd),
1461fDetectors(0),
1462fN(0),
1463fDy5(0),
1464fDy10(0),
1465fDy20(0),
1466fClustersCs(0),
1467fClusterIndexCs(0),
1468fYcs(0),
1469fZcs(0),
1470fNcs(0),
1471fCurrentSlice(-1),
d9ead1a0 1472fZmin(0),
8221b41b 1473fZmax(0),
1474fYmin(0),
1475fYmax(0),
1476fI(0),
1477fImax(0),
1478fSkip(0),
1479fAccepted(0),
d9ead1a0 1480fRoad(0),
1481fMaxSigmaClY(0),
1482fMaxSigmaClZ(0),
1483fNMaxSigmaCl(3) {
e43c066c 1484 //--------------------------------------------------------------------
1485 //main AliITSlayer constructor
1486 //--------------------------------------------------------------------
e43c066c 1487 fDetectors=new AliITSdetector[fNladders*fNdetectors];
afd25725 1488 fRoad=2*fR*TMath::Sqrt(TMath::Pi()/1.);//assuming that there's only one cluster
e43c066c 1489}
44347160 1490//------------------------------------------------------------------------
8221b41b 1491AliITStrackerMI::AliITSlayer::AliITSlayer(const AliITSlayer& layer):
1492fR(layer.fR),
1493fPhiOffset(layer.fPhiOffset),
1494fNladders(layer.fNladders),
1495fZOffset(layer.fZOffset),
1496fNdetectors(layer.fNdetectors),
1497fDetectors(layer.fDetectors),
1498fN(layer.fN),
1499fDy5(layer.fDy5),
1500fDy10(layer.fDy10),
1501fDy20(layer.fDy20),
1502fClustersCs(layer.fClustersCs),
1503fClusterIndexCs(layer.fClusterIndexCs),
1504fYcs(layer.fYcs),
1505fZcs(layer.fZcs),
1506fNcs(layer.fNcs),
1507fCurrentSlice(layer.fCurrentSlice),
d9ead1a0 1508fZmin(layer.fZmin),
8221b41b 1509fZmax(layer.fZmax),
1510fYmin(layer.fYmin),
1511fYmax(layer.fYmax),
1512fI(layer.fI),
1513fImax(layer.fImax),
1514fSkip(layer.fSkip),
1515fAccepted(layer.fAccepted),
d9ead1a0 1516fRoad(layer.fRoad),
1517fMaxSigmaClY(layer.fMaxSigmaClY),
1518fMaxSigmaClZ(layer.fMaxSigmaClZ),
1519fNMaxSigmaCl(layer.fNMaxSigmaCl)
1520{
8221b41b 1521 //Copy constructor
1522}
44347160 1523//------------------------------------------------------------------------
e43c066c 1524AliITStrackerMI::AliITSlayer::~AliITSlayer() {
1525 //--------------------------------------------------------------------
1526 // AliITSlayer destructor
1527 //--------------------------------------------------------------------
23197852 1528 delete [] fDetectors;
e43c066c 1529 for (Int_t i=0; i<fN; i++) delete fClusters[i];
e50912db 1530 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1531 fClusterWeight[i]=0;
1532 fClusterTracks[0][i]=-1;
1533 fClusterTracks[1][i]=-1;
1534 fClusterTracks[2][i]=-1;
1535 fClusterTracks[3][i]=-1;
1536 }
1537}
44347160 1538//------------------------------------------------------------------------
e43c066c 1539void AliITStrackerMI::AliITSlayer::ResetClusters() {
1540 //--------------------------------------------------------------------
1541 // This function removes loaded clusters
1542 //--------------------------------------------------------------------
1543 for (Int_t i=0; i<fN; i++) delete fClusters[i];
e50912db 1544 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++){
e43c066c 1545 fClusterWeight[i]=0;
1546 fClusterTracks[0][i]=-1;
1547 fClusterTracks[1][i]=-1;
1548 fClusterTracks[2][i]=-1;
1549 fClusterTracks[3][i]=-1;
1550 }
1551
1552 fN=0;
1553 fI=0;
1554}
44347160 1555//------------------------------------------------------------------------
e43c066c 1556void AliITStrackerMI::AliITSlayer::ResetWeights() {
1557 //--------------------------------------------------------------------
1558 // This function reset weights of the clusters
1559 //--------------------------------------------------------------------
e50912db 1560 for (Int_t i=0; i<AliITSRecoParam::GetMaxClusterPerLayer(); i++) {
e43c066c 1561 fClusterWeight[i]=0;
1562 fClusterTracks[0][i]=-1;
1563 fClusterTracks[1][i]=-1;
1564 fClusterTracks[2][i]=-1;
1565 fClusterTracks[3][i]=-1;
1566 }
1567 for (Int_t i=0; i<fN;i++) {
00a7cc50 1568 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster(i);
e43c066c 1569 if (cl&&cl->IsUsed()) cl->Use();
1570 }
1571
1572}
44347160 1573//------------------------------------------------------------------------
e43c066c 1574void AliITStrackerMI::AliITSlayer::ResetRoad() {
1575 //--------------------------------------------------------------------
1576 // This function calculates the road defined by the cluster density
1577 //--------------------------------------------------------------------
1578 Int_t n=0;
1579 for (Int_t i=0; i<fN; i++) {
1580 if (TMath::Abs(fClusters[i]->GetZ())<fR) n++;
1581 }
afd25725 1582 if (n>1) fRoad=2*fR*TMath::Sqrt(TMath::Pi()/n);
e43c066c 1583}
44347160 1584//------------------------------------------------------------------------
afd25725 1585Int_t AliITStrackerMI::AliITSlayer::InsertCluster(AliITSRecPoint *cl) {
e43c066c 1586 //--------------------------------------------------------------------
1587 //This function adds a cluster to this layer
1588 //--------------------------------------------------------------------
e50912db 1589 if (fN==AliITSRecoParam::GetMaxClusterPerLayer()) {
e43c066c 1590 ::Error("InsertCluster","Too many clusters !\n");
1591 return 1;
1592 }
1593 fCurrentSlice=-1;
afd25725 1594 fClusters[fN]=cl;
1d4090b7 1595 fN++;
afd25725 1596 AliITSdetector &det=GetDetector(cl->GetDetectorIndex());
d9ead1a0 1597 //AD
1598 Double_t nSigmaY=fNMaxSigmaCl*TMath::Sqrt(cl->GetSigmaY2());
1599 Double_t nSigmaZ=fNMaxSigmaCl*TMath::Sqrt(cl->GetSigmaZ2());
1600 if (cl->GetY()-nSigmaY<det.GetYmin()) det.SetYmin(cl->GetY()-nSigmaY);
1601 if (cl->GetY()+nSigmaY>det.GetYmax()) det.SetYmax(cl->GetY()+nSigmaY);
1602 if (cl->GetZ()-nSigmaZ<det.GetZmin()) det.SetZmin(cl->GetZ()-nSigmaZ);
1603 if (cl->GetZ()+nSigmaZ>det.GetZmax()) det.SetZmax(cl->GetZ()+nSigmaZ);
1604 //AD
1605 /*
afd25725 1606 if (cl->GetY()<det.GetYmin()) det.SetYmin(cl->GetY());
1607 if (cl->GetY()>det.GetYmax()) det.SetYmax(cl->GetY());
1608 if (cl->GetZ()<det.GetZmin()) det.SetZmin(cl->GetZ());
1609 if (cl->GetZ()>det.GetZmax()) det.SetZmax(cl->GetZ());
d9ead1a0 1610 */
e43c066c 1611 return 0;
1612}
44347160 1613//------------------------------------------------------------------------
e43c066c 1614void AliITStrackerMI::AliITSlayer::SortClusters()
1615{
1616 //
1617 //sort clusters
1618 //
00a7cc50 1619 AliITSRecPoint **clusters = new AliITSRecPoint*[fN];
1d4090b7 1620 Float_t *z = new Float_t[fN];
1621 Int_t * index = new Int_t[fN];
1622 //
d9ead1a0 1623 fMaxSigmaClY=0.; //AD
1624 fMaxSigmaClZ=0.; //AD
1625
1d4090b7 1626 for (Int_t i=0;i<fN;i++){
1627 z[i] = fClusters[i]->GetZ();
d9ead1a0 1628 // save largest errors in y and z for this layer
1629 fMaxSigmaClY=TMath::Max(fMaxSigmaClY,TMath::Sqrt(fClusters[i]->GetSigmaY2()));
1630 fMaxSigmaClZ=TMath::Max(fMaxSigmaClZ,TMath::Sqrt(fClusters[i]->GetSigmaZ2()));
1d4090b7 1631 }
1632 TMath::Sort(fN,z,index,kFALSE);
1633 for (Int_t i=0;i<fN;i++){
1634 clusters[i] = fClusters[index[i]];
1635 }
1636 //
1637 for (Int_t i=0;i<fN;i++){
1638 fClusters[i] = clusters[i];
1639 fZ[i] = fClusters[i]->GetZ();
1640 AliITSdetector &det=GetDetector(fClusters[i]->GetDetectorIndex());
1641 Double_t y=fR*det.GetPhi() + fClusters[i]->GetY();
1642 if (y>2.*fR*TMath::Pi()) y -= 2.*fR*TMath::Pi();
1643 fY[i] = y;
1644 }
1645 delete[] index;
1646 delete[] z;
1647 delete[] clusters;
1648 //
1649
e43c066c 1650 fYB[0]=10000000;
1651 fYB[1]=-10000000;
1652 for (Int_t i=0;i<fN;i++){
1653 if (fY[i]<fYB[0]) fYB[0]=fY[i];
1654 if (fY[i]>fYB[1]) fYB[1]=fY[i];
1655 fClusterIndex[i] = i;
1656 }
1657 //
1658 // fill slices
1659 fDy5 = (fYB[1]-fYB[0])/5.;
1660 fDy10 = (fYB[1]-fYB[0])/10.;
1661 fDy20 = (fYB[1]-fYB[0])/20.;
1662 for (Int_t i=0;i<6;i++) fN5[i] =0;
1663 for (Int_t i=0;i<11;i++) fN10[i]=0;
1664 for (Int_t i=0;i<21;i++) fN20[i]=0;
1665 //
1666 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;}
1667 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;}
1668 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;}
1669 //
1670 //
1d4090b7 1671 for (Int_t i=0;i<fN;i++)
1672 for (Int_t irot=-1;irot<=1;irot++){
1673 Float_t curY = fY[i]+irot*TMath::TwoPi()*fR;
1674 // slice 5
1675 for (Int_t slice=0; slice<6;slice++){
e50912db 1676 if (fBy5[slice][0]<curY && curY<fBy5[slice][1]&&fN5[slice]<AliITSRecoParam::GetMaxClusterPerLayer5()){
1d4090b7 1677 fClusters5[slice][fN5[slice]] = fClusters[i];
1678 fY5[slice][fN5[slice]] = curY;
1679 fZ5[slice][fN5[slice]] = fZ[i];
1680 fClusterIndex5[slice][fN5[slice]]=i;
1681 fN5[slice]++;
1682 }
e43c066c 1683 }
1d4090b7 1684 // slice 10
1685 for (Int_t slice=0; slice<11;slice++){
e50912db 1686 if (fBy10[slice][0]<curY && curY<fBy10[slice][1]&&fN10[slice]<AliITSRecoParam::GetMaxClusterPerLayer10()){
1d4090b7 1687 fClusters10[slice][fN10[slice]] = fClusters[i];
1688 fY10[slice][fN10[slice]] = curY;
1689 fZ10[slice][fN10[slice]] = fZ[i];
1690 fClusterIndex10[slice][fN10[slice]]=i;
1691 fN10[slice]++;
1692 }
e43c066c 1693 }
1d4090b7 1694 // slice 20
1695 for (Int_t slice=0; slice<21;slice++){
e50912db 1696 if (fBy20[slice][0]<curY && curY<fBy20[slice][1]&&fN20[slice]<AliITSRecoParam::GetMaxClusterPerLayer20()){
1d4090b7 1697 fClusters20[slice][fN20[slice]] = fClusters[i];
1698 fY20[slice][fN20[slice]] = curY;
1699 fZ20[slice][fN20[slice]] = fZ[i];
1700 fClusterIndex20[slice][fN20[slice]]=i;
1701 fN20[slice]++;
1702 }
1703 }
e43c066c 1704 }
1d4090b7 1705
1706 //
1707 // consistency check
1708 //
1709 for (Int_t i=0;i<fN-1;i++){
1710 if (fZ[i]>fZ[i+1]){
ae00569a 1711 printf("Bug\n");
e43c066c 1712 }
1713 }
1d4090b7 1714 //
1715 for (Int_t slice=0;slice<21;slice++)
1716 for (Int_t i=0;i<fN20[slice]-1;i++){
1717 if (fZ20[slice][i]>fZ20[slice][i+1]){
ae00569a 1718 printf("Bug\n");
1d4090b7 1719 }
1720 }
1721
1722
e43c066c 1723}
44347160 1724//------------------------------------------------------------------------
e43c066c 1725Int_t AliITStrackerMI::AliITSlayer::FindClusterIndex(Float_t z) const {
1726 //--------------------------------------------------------------------
1727 // This function returns the index of the nearest cluster
1728 //--------------------------------------------------------------------
1729 Int_t ncl=0;
1730 const Float_t *zcl;
1731 if (fCurrentSlice<0) {
1732 ncl = fN;
1733 zcl = fZ;
1734 }
1735 else{
1736 ncl = fNcs;
1737 zcl = fZcs;;
1738 }
1739
1740 if (ncl==0) return 0;
1741 Int_t b=0, e=ncl-1, m=(b+e)/2;
1742 for (; b<e; m=(b+e)/2) {
1743 // if (z > fClusters[m]->GetZ()) b=m+1;
1744 if (z > zcl[m]) b=m+1;
1745 else e=m;
1746 }
1747 return m;
1748}
44347160 1749//------------------------------------------------------------------------
1c97ce2f 1750Bool_t AliITStrackerMI::ComputeRoad(AliITStrackMI* track,Int_t ilayer,Int_t idet,Double_t &zmin,Double_t &zmax,Double_t &ymin,Double_t &ymax) const {
1751 //--------------------------------------------------------------------
1752 // This function computes the rectangular road for this track
1753 //--------------------------------------------------------------------
1754
1755
1756 AliITSdetector &det = fgLayers[ilayer].GetDetector(idet);
1757 // take into account the misalignment: propagate track to misaligned detector plane
1758 if (!track->Propagate(det.GetPhi(),det.GetRmisal())) return kFALSE;
1759
1760 Double_t dz=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadZ()*
1761 TMath::Sqrt(track->GetSigmaZ2() +
1762 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1763 AliITSReconstructor::GetRecoParam()->GetNSigmaZLayerForRoadZ()*
1764 AliITSReconstructor::GetRecoParam()->GetSigmaZ2(ilayer));
1765 Double_t dy=AliITSReconstructor::GetRecoParam()->GetNSigmaRoadY()*
1766 TMath::Sqrt(track->GetSigmaY2() +
1767 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1768 AliITSReconstructor::GetRecoParam()->GetNSigmaYLayerForRoadY()*
1769 AliITSReconstructor::GetRecoParam()->GetSigmaY2(ilayer));
1770
1771 // track at boundary between detectors, enlarge road
1772 Double_t boundaryWidth=AliITSRecoParam::GetBoundaryWidth();
1773 if ( (track->GetY()-dy < det.GetYmin()+boundaryWidth) ||
1774 (track->GetY()+dy > det.GetYmax()-boundaryWidth) ||
1775 (track->GetZ()-dz < det.GetZmin()+boundaryWidth) ||
1776 (track->GetZ()+dz > det.GetZmax()-boundaryWidth) ) {
1777 Float_t tgl = TMath::Abs(track->GetTgl());
1778 if (tgl > 1.) tgl=1.;
1779 Double_t deltaXNeighbDets=AliITSRecoParam::GetDeltaXNeighbDets();
1780 dz = TMath::Sqrt(dz*dz+deltaXNeighbDets*deltaXNeighbDets*tgl*tgl);
1781 Float_t snp = TMath::Abs(track->GetSnp());
1782 if (snp > AliITSReconstructor::GetRecoParam()->GetMaxSnp()) return kFALSE;
1783 dy = TMath::Sqrt(dy*dy+deltaXNeighbDets*deltaXNeighbDets*snp*snp);
1784 } // boundary
1785
1786 // add to the road a term (up to 2-3 mm) to deal with misalignments
1787 dy = TMath::Sqrt(dy*dy + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1788 dz = TMath::Sqrt(dz*dz + AliITSReconstructor::GetRecoParam()->GetRoadMisal()*AliITSReconstructor::GetRecoParam()->GetRoadMisal());
1789
1790 Double_t r = fgLayers[ilayer].GetR();
1791 zmin = track->GetZ() - dz;
1792 zmax = track->GetZ() + dz;
1793 ymin = track->GetY() + r*det.GetPhi() - dy;
1794 ymax = track->GetY() + r*det.GetPhi() + dy;
1795
1796 // bring track back to idead detector plane
1797 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
1798
1799 return kTRUE;
1800}
1801//------------------------------------------------------------------------
e43c066c 1802void AliITStrackerMI::AliITSlayer::
1803SelectClusters(Double_t zmin,Double_t zmax,Double_t ymin, Double_t ymax) {
1804 //--------------------------------------------------------------------
1805 // This function sets the "window"
1806 //--------------------------------------------------------------------
1807
628e7bb0 1808 Double_t circle=2*TMath::Pi()*fR;
d9ead1a0 1809 fYmin = ymin;
1810 fYmax = ymax;
1811 fZmin = zmin;
1812 fZmax = zmax;
1813 // AD
1814 // enlarge road in y by maximum cluster error on this layer (3 sigma)
1815 fYmin -= fNMaxSigmaCl*fMaxSigmaClY;
1816 fYmax += fNMaxSigmaCl*fMaxSigmaClY;
1817 fZmin -= fNMaxSigmaCl*fMaxSigmaClZ;
1818 fZmax += fNMaxSigmaCl*fMaxSigmaClZ;
1819
e43c066c 1820 Float_t ymiddle = (fYmin+fYmax)*0.5;
ae00569a 1821 if (ymiddle<fYB[0]) {
1822 fYmin+=circle; fYmax+=circle; ymiddle+=circle;
1823 } else if (ymiddle>fYB[1]) {
1824 fYmin-=circle; fYmax-=circle; ymiddle-=circle;
e43c066c 1825 }
ae00569a 1826
e43c066c 1827 //
1828 fCurrentSlice =-1;
1829 // defualt take all
1830 fClustersCs = fClusters;
1831 fClusterIndexCs = fClusterIndex;
1832 fYcs = fY;
1833 fZcs = fZ;
1834 fNcs = fN;
628e7bb0 1835 //
e43c066c 1836 //is in 20 slice?
1837 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy20){
1838 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy20);
1839 if (slice<0) slice=0;
1840 if (slice>20) slice=20;
1841 Bool_t isOK = (fYmin>fBy20[slice][0]&&fYmax<fBy20[slice][1]);
1842 if (isOK) {
1843 fCurrentSlice=slice;
1844 fClustersCs = fClusters20[fCurrentSlice];
1845 fClusterIndexCs = fClusterIndex20[fCurrentSlice];
1846 fYcs = fY20[fCurrentSlice];
1847 fZcs = fZ20[fCurrentSlice];
1848 fNcs = fN20[fCurrentSlice];
1849 }
1850 }
1851 //
1852 //is in 10 slice?
1853 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy10){
1854 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy10);
1855 if (slice<0) slice=0;
1856 if (slice>10) slice=10;
1857 Bool_t isOK = (fYmin>fBy10[slice][0]&&fYmax<fBy10[slice][1]);
1858 if (isOK) {
1859 fCurrentSlice=slice;
1860 fClustersCs = fClusters10[fCurrentSlice];
1861 fClusterIndexCs = fClusterIndex10[fCurrentSlice];
1862 fYcs = fY10[fCurrentSlice];
1863 fZcs = fZ10[fCurrentSlice];
1864 fNcs = fN10[fCurrentSlice];
1865 }
1866 }
1867 //
1868 //is in 5 slice?
1869 if (fCurrentSlice<0&&TMath::Abs(fYmax-fYmin)<1.49*fDy5){
1870 Int_t slice = int(0.5+(ymiddle-fYB[0])/fDy5);
1871 if (slice<0) slice=0;
1872 if (slice>5) slice=5;
1873 Bool_t isOK = (fYmin>fBy5[slice][0]&&fYmax<fBy5[slice][1]);
ae00569a 1874 if (isOK) {
e43c066c 1875 fCurrentSlice=slice;
1876 fClustersCs = fClusters5[fCurrentSlice];
1877 fClusterIndexCs = fClusterIndex5[fCurrentSlice];
1878 fYcs = fY5[fCurrentSlice];
1879 fZcs = fZ5[fCurrentSlice];
1880 fNcs = fN5[fCurrentSlice];
1881 }
1882 }
628e7bb0 1883 //
d9ead1a0 1884 fI = FindClusterIndex(fZmin);
1885 fImax = TMath::Min(FindClusterIndex(fZmax)+1,fNcs);
1886 fSkip = 0;
1887 fAccepted = 0;
6518a6c5 1888
1889 return;
e43c066c 1890}
44347160 1891//------------------------------------------------------------------------
628e7bb0 1892Int_t AliITStrackerMI::AliITSlayer::
1893FindDetectorIndex(Double_t phi, Double_t z) const {
1894 //--------------------------------------------------------------------
1895 //This function finds the detector crossed by the track
1896 //--------------------------------------------------------------------
31fb8575 1897 Double_t dphi;
1898 if (fZOffset<0) // old geometry
1899 dphi = -(phi-fPhiOffset);
1900 else // new geometry
1901 dphi = phi-fPhiOffset;
1902
6518a6c5 1903
628e7bb0 1904 if (dphi < 0) dphi += 2*TMath::Pi();
1905 else if (dphi >= 2*TMath::Pi()) dphi -= 2*TMath::Pi();
1906 Int_t np=Int_t(dphi*fNladders*0.5/TMath::Pi()+0.5);
1907 if (np>=fNladders) np-=fNladders;
1908 if (np<0) np+=fNladders;
1909
6518a6c5 1910
628e7bb0 1911 Double_t dz=fZOffset-z;
6518a6c5 1912 Double_t nnz = dz*(fNdetectors-1)*0.5/fZOffset+0.5;
1913 Int_t nz = (nnz<0 ? -1 : (Int_t)nnz);
628e7bb0 1914 if (nz>=fNdetectors) return -1;
1915 if (nz<0) return -1;
1916
23197852 1917 // ad hoc correction for 3rd ladder of SDD inner layer,
1918 // which is reversed (rotated by pi around local y)
1919 // this correction is OK only from AliITSv11Hybrid onwards
1920 if (GetR()>12. && GetR()<20.) { // SDD inner
1921 if(np==2) { // 3rd ladder
1922 nz = (fNdetectors-1) - nz;
1923 }
1924 }
1925 //printf("ndet %d phi %f z %f np %d nz %d\n",fNdetectors,phi,z,np,nz);
1926
1927
628e7bb0 1928 return np*fNdetectors + nz;
1929}
44347160 1930//------------------------------------------------------------------------
ae00569a 1931const AliITSRecPoint *AliITStrackerMI::AliITSlayer::GetNextCluster(Int_t &ci,Bool_t test)
1932{
e43c066c 1933 //--------------------------------------------------------------------
1934 // This function returns clusters within the "window"
1935 //--------------------------------------------------------------------
1936
ae00569a 1937 if (fCurrentSlice<0) {
e43c066c 1938 Double_t rpi2 = 2.*fR*TMath::Pi();
1939 for (Int_t i=fI; i<fImax; i++) {
1940 Double_t y = fY[i];
d9ead1a0 1941 Double_t z = fZ[i];
e43c066c 1942 if (fYmax<y) y -= rpi2;
1d4090b7 1943 if (fYmin>y) y += rpi2;
e43c066c 1944 if (y<fYmin) continue;
1945 if (y>fYmax) continue;
d9ead1a0 1946 // AD
1947 // skip clusters that are in "extended" road but they
1948 // 3sigma error does not touch the original road
1949 if (z+fNMaxSigmaCl*TMath::Sqrt(fClusters[i]->GetSigmaZ2())<fZmin+fNMaxSigmaCl*fMaxSigmaClZ) continue;
1950 if (z-fNMaxSigmaCl*TMath::Sqrt(fClusters[i]->GetSigmaZ2())>fZmax-fNMaxSigmaCl*fMaxSigmaClZ) continue;
1951 //
e43c066c 1952 if (fClusters[i]->GetQ()==0&&fSkip==2) continue;
1953 ci=i;
ae00569a 1954 if (!test) fI=i+1;
e43c066c 1955 return fClusters[i];
1956 }
ae00569a 1957 } else {
e43c066c 1958 for (Int_t i=fI; i<fImax; i++) {
1959 if (fYcs[i]<fYmin) continue;
1960 if (fYcs[i]>fYmax) continue;
1961 if (fClustersCs[i]->GetQ()==0&&fSkip==2) continue;
1962 ci=fClusterIndexCs[i];
ae00569a 1963 if (!test) fI=i+1;
e43c066c 1964 return fClustersCs[i];
1965 }
1966 }
1967 return 0;
1968}
44347160 1969//------------------------------------------------------------------------
e43c066c 1970Double_t AliITStrackerMI::AliITSlayer::GetThickness(Double_t y,Double_t z,Double_t &x0)
1971const {
1972 //--------------------------------------------------------------------
afd25725 1973 // This function returns the layer thickness at this point (units X0)
e43c066c 1974 //--------------------------------------------------------------------
1975 Double_t d=0.0085;
e50912db 1976 x0=AliITSRecoParam::GetX0Air();
e43c066c 1977 if (43<fR&&fR<45) { //SSD2
1978 Double_t dd=0.0034;
1979 d=dd;
1980 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1981 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
1982 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
1983 for (Int_t i=0; i<12; i++) {
1984 if (TMath::Abs(z-3.9*(i+0.5))<0.15) {
1985 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1986 d+=0.0034;
1987 break;
1988 }
1989 if (TMath::Abs(z+3.9*(i+0.5))<0.15) {
1990 if (TMath::Abs(y-0.00)>3.40) d+=dd;
1991 d+=0.0034;
1992 break;
1993 }
1994 if (TMath::Abs(z-3.4-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1995 if (TMath::Abs(z+0.5+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
1996 }
1997 } else
1998 if (37<fR&&fR<41) { //SSD1
1999 Double_t dd=0.0034;
2000 d=dd;
2001 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2002 if (TMath::Abs(y-1.90)<0.45) {d+=(0.013-0.0034);}
2003 if (TMath::Abs(y+1.90)<0.45) {d+=(0.013-0.0034);}
2004 for (Int_t i=0; i<11; i++) {
2005 if (TMath::Abs(z-3.9*i)<0.15) {
2006 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2007 d+=dd;
2008 break;
2009 }
2010 if (TMath::Abs(z+3.9*i)<0.15) {
2011 if (TMath::Abs(y-0.00)>3.40) d+=dd;
2012 d+=dd;
2013 break;
2014 }
2015 if (TMath::Abs(z-1.85-3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2016 if (TMath::Abs(z+2.05+3.9*i)<0.50) {d+=(0.016-0.0034); break;}
2017 }
2018 } else
2019 if (13<fR&&fR<26) { //SDD
2020 Double_t dd=0.0033;
2021 d=dd;
2022 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2023
2024 if (TMath::Abs(y-1.80)<0.55) {
2025 d+=0.016;
2026 for (Int_t j=0; j<20; j++) {
2027 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2028 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2029 }
2030 }
2031 if (TMath::Abs(y+1.80)<0.55) {
2032 d+=0.016;
2033 for (Int_t j=0; j<20; j++) {
2034 if (TMath::Abs(z-0.7-1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2035 if (TMath::Abs(z+0.7+1.47*j)<0.12) {d+=0.08; x0=9.; break;}
2036 }
2037 }
2038
2039 for (Int_t i=0; i<4; i++) {
2040 if (TMath::Abs(z-7.3*i)<0.60) {
2041 d+=dd;
2042 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2043 break;
2044 }
2045 if (TMath::Abs(z+7.3*i)<0.60) {
2046 d+=dd;
2047 if (TMath::Abs(y-0.00)>3.30) d+=dd;
2048 break;
2049 }
2050 }
2051 } else
2052 if (6<fR&&fR<8) { //SPD2
2053 Double_t dd=0.0063; x0=21.5;
2054 d=dd;
2055 if (TMath::Abs(y-3.08)>0.5) d+=dd;
afd25725 2056 if (TMath::Abs(y-3.03)<0.10) d+=0.014;
e43c066c 2057 } else
2058 if (3<fR&&fR<5) { //SPD1
2059 Double_t dd=0.0063; x0=21.5;
2060 d=dd;
2061 if (TMath::Abs(y+0.21)>0.6) d+=dd;
afd25725 2062 if (TMath::Abs(y+0.10)<0.10) d+=0.014;
e43c066c 2063 }
2064
2065 return d;
2066}
44347160 2067//------------------------------------------------------------------------
23197852 2068AliITStrackerMI::AliITSdetector::AliITSdetector(const AliITSdetector& det):
2069fR(det.fR),
1c97ce2f 2070fRmisal(det.fRmisal),
23197852 2071fPhi(det.fPhi),
2072fSinPhi(det.fSinPhi),
2073fCosPhi(det.fCosPhi),
2074fYmin(det.fYmin),
2075fYmax(det.fYmax),
2076fZmin(det.fZmin),
2077fZmax(det.fZmax),
2078fIsBad(det.fIsBad),
2079fNChips(det.fNChips),
2080fChipIsBad(det.fChipIsBad)
2081{
2082 //Copy constructor
2083}
2084//------------------------------------------------------------------------
2085void AliITStrackerMI::AliITSdetector::ReadBadDetectorAndChips(Int_t ilayer,Int_t idet,
a70ed6ad 2086 const AliITSDetTypeRec *detTypeRec)
23197852 2087{
2088 //--------------------------------------------------------------------
2089 // Read bad detectors and chips from calibration objects in AliITSDetTypeRec
2090 //--------------------------------------------------------------------
2091
2092 // In AliITSDetTypeRec, detector numbers go from 0 to 2197
2093 // while in the tracker they start from 0 for each layer
2094 for(Int_t il=0; il<ilayer; il++)
2095 idet += AliITSgeomTGeo::GetNLadders(il+1)*AliITSgeomTGeo::GetNDetectors(il+1);
2096
2097 Int_t detType;
2098 if (ilayer==0 || ilayer==1) { // ---------- SPD
2099 detType = 0;
2100 } else if (ilayer==2 || ilayer==3) { // ---------- SDD
2101 detType = 1;
2102 } else if (ilayer==4 || ilayer==5) { // ---------- SSD
2103 detType = 2;
2104 } else {
2105 printf("AliITStrackerMI::AliITSdetector::InitBadFromOCDB: Wrong layer number %d\n",ilayer);
2106 return;
2107 }
2108
2109 // Get calibration from AliITSDetTypeRec
2110 AliITSCalibration *calib = (AliITSCalibration*)detTypeRec->GetCalibrationModel(idet);
d1181f10 2111 calib->SetModuleIndex(idet);
23197852 2112 AliITSCalibration *calibSPDdead = 0;
2113 if(detType==0) calibSPDdead = (AliITSCalibration*)detTypeRec->GetSPDDeadModel(idet); // TEMPORARY
2114 if (calib->IsBad() ||
2115 (detType==0 && calibSPDdead->IsBad())) // TEMPORARY
2116 {
2117 SetBad();
359ac74d 2118 // printf("lay %d bad %d\n",ilayer,idet);
23197852 2119 }
2120
2121 // Get segmentation from AliITSDetTypeRec
2122 AliITSsegmentation *segm = (AliITSsegmentation*)detTypeRec->GetSegmentationModel(detType);
2123
2124 // Read info about bad chips
2125 fNChips = segm->GetMaximumChipIndex()+1;
2126 //printf("ilayer %d detType %d idet %d fNChips %d %d GetNumberOfChips %d\n",ilayer,detType,idet,fNChips,segm->GetMaximumChipIndex(),segm->GetNumberOfChips());
2127 if(fChipIsBad) { delete [] fChipIsBad; fChipIsBad=NULL; }
2128 fChipIsBad = new Bool_t[fNChips];
2129 for (Int_t iCh=0;iCh<fNChips;iCh++) {
2130 fChipIsBad[iCh] = calib->IsChipBad(iCh);
2131 if (detType==0 && calibSPDdead->IsChipBad(iCh)) fChipIsBad[iCh] = kTRUE; // TEMPORARY
4187a601 2132 //if(fChipIsBad[iCh]) {printf("lay %d det %d bad chip %d\n",ilayer,idet,iCh);}
23197852 2133 }
2134
2135 return;
2136}
2137//------------------------------------------------------------------------
e50912db 2138Double_t AliITStrackerMI::GetEffectiveThickness()
e43c066c 2139{
2140 //--------------------------------------------------------------------
afd25725 2141 // Returns the thickness between the current layer and the vertex (units X0)
e43c066c 2142 //--------------------------------------------------------------------
e43c066c 2143
e50912db 2144 if(fUseTGeo!=0) {
2145 if(fxOverX0Layer[0]<0) BuildMaterialLUT("Layers");
2146 if(fxOverX0Shield[0]<0) BuildMaterialLUT("Shields");
2147 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
2148 }
2149
afd25725 2150 // beam pipe
e50912db 2151 Double_t dPipe = (fUseTGeo==0 ? AliITSRecoParam::GetdPipe() : fxOverX0Pipe);
2152 Double_t d=dPipe*AliITSRecoParam::GetrPipe()*AliITSRecoParam::GetrPipe();
afd25725 2153
2154 // layers
2155 Double_t x0=0;
e43c066c 2156 Double_t xn=fgLayers[fI].GetR();
2157 for (Int_t i=0; i<fI; i++) {
2158 Double_t xi=fgLayers[i].GetR();
e50912db 2159 Double_t dLayer = (fUseTGeo==0 ? fgLayers[i].GetThickness(0,0,x0) : fxOverX0Layer[i]);
2160 d+=dLayer*xi*xi;
e43c066c 2161 }
2162
afd25725 2163 // shields
e43c066c 2164 if (fI>1) {
e50912db 2165 Double_t dshieldSPD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(0) : fxOverX0Shield[0]);
2166 d+=dshieldSPD*AliITSRecoParam::GetrInsideShield(0)*AliITSRecoParam::GetrInsideShield(0);
e43c066c 2167 }
e43c066c 2168 if (fI>3) {
e50912db 2169 Double_t dshieldSDD = (fUseTGeo==0 ? AliITSRecoParam::Getdshield(1) : fxOverX0Shield[1]);
2170 d+=dshieldSDD*AliITSRecoParam::GetrInsideShield(1)*AliITSRecoParam::GetrInsideShield(1);
e43c066c 2171 }
e43c066c 2172 return d/(xn*xn);
2173}
44347160 2174//------------------------------------------------------------------------
e43c066c 2175Int_t AliITStrackerMI::AliITSlayer::InRoad() const {
ae00569a 2176 //-------------------------------------------------------------------
e43c066c 2177 // This function returns number of clusters within the "window"
2178 //--------------------------------------------------------------------
2179 Int_t ncl=0;
2180 for (Int_t i=fI; i<fN; i++) {
00a7cc50 2181 const AliITSRecPoint *c=fClusters[i];
e43c066c 2182 if (c->GetZ() > fZmax) break;
2183 if (c->IsUsed()) continue;
2184 const AliITSdetector &det=GetDetector(c->GetDetectorIndex());
2185 Double_t y=fR*det.GetPhi() + c->GetY();
2186
2187 if (y>2.*fR*TMath::Pi()) y -= 2*fR*TMath::Pi();
2188 if (y>1.*fR*TMath::Pi() && fYmax<y) y -= 2*fR*TMath::Pi();
2189
2190 if (y<fYmin) continue;
2191 if (y>fYmax) continue;
2192 ncl++;
2193 }
2194 return ncl;
2195}
44347160 2196//------------------------------------------------------------------------
ae00569a 2197Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
7167ae53 2198 const AliITStrackMI *clusters,Bool_t extra, Bool_t planeeff)
ae00569a 2199{
e43c066c 2200 //--------------------------------------------------------------------
ae00569a 2201 // This function refits the track "track" at the position "x" using
2202 // the clusters from "clusters"
ef7253ac 2203 // If "extra"==kTRUE,
ae00569a 2204 // the clusters from overlapped modules get attached to "track"
7167ae53 2205 // If "planeff"==kTRUE,
2206 // special approach for plane efficiency evaluation is applyed
e43c066c 2207 //--------------------------------------------------------------------
6518a6c5 2208
e50912db 2209 Int_t index[AliITSgeomTGeo::kNLayers];
e43c066c 2210 Int_t k;
e50912db 2211 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
ae00569a 2212 Int_t nc=clusters->GetNumberOfClusters();
e43c066c 2213 for (k=0; k<nc; k++) {
ae00569a 2214 Int_t idx=clusters->GetClusterIndex(k);
2215 Int_t ilayer=(idx&0xf0000000)>>28;
2216 index[ilayer]=idx;
e43c066c 2217 }
67c1e979 2218
7167ae53 2219 return RefitAt(xx,track,index,extra,planeeff); // call the method below
67c1e979 2220}
44347160 2221//------------------------------------------------------------------------
ae00569a 2222Bool_t AliITStrackerMI::RefitAt(Double_t xx,AliITStrackMI *track,
7167ae53 2223 const Int_t *clusters,Bool_t extra, Bool_t planeeff)
ae00569a 2224{
67c1e979 2225 //--------------------------------------------------------------------
ae00569a 2226 // This function refits the track "track" at the position "x" using
67c1e979 2227 // the clusters from array
ae00569a 2228 // If "extra"==kTRUE,
2229 // the clusters from overlapped modules get attached to "track"
7167ae53 2230 // If "planeff"==kTRUE,
2231 // special approach for plane efficiency evaluation is applyed
67c1e979 2232 //--------------------------------------------------------------------
e50912db 2233 Int_t index[AliITSgeomTGeo::kNLayers];
67c1e979 2234 Int_t k;
e50912db 2235 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
67c1e979 2236 //
e50912db 2237 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
ae00569a 2238 index[k]=clusters[k];
67c1e979 2239 }
2240
afd25725 2241 // special for cosmics: check which the innermost layer crossed
2242 // by the track
2243 Int_t innermostlayer=5;
ae00569a 2244 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
2245 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
2246 if(drphi < fgLayers[innermostlayer].GetR()) break;
2247 }
4fa7f7d1 2248 AliDebug(2,Form(" drphi %f innermost %d",drphi,innermostlayer));
afd25725 2249
ae00569a 2250 Int_t modstatus=1; // found
2251 Float_t xloc,zloc;
67c1e979 2252 Int_t from, to, step;
ae00569a 2253 if (xx > track->GetX()) {
e50912db 2254 from=innermostlayer; to=AliITSgeomTGeo::GetNLayers();
67c1e979 2255 step=+1;
2256 } else {
e50912db 2257 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
67c1e979 2258 step=-1;
2259 }
ae00569a 2260 TString dir = (step>0 ? "outward" : "inward");
67c1e979 2261
ae00569a 2262 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
6518a6c5 2263 AliITSlayer &layer=fgLayers[ilayer];
67c1e979 2264 Double_t r=layer.GetR();
4fa7f7d1 2265
afd25725 2266 if (step<0 && xx>r) break;
2267
2268 // material between SSD and SDD, SDD and SPD
6518a6c5 2269 Double_t hI=ilayer-0.5*step;
e50912db 2270 if (TMath::Abs(hI-3.5)<0.01) // SDDouter
ae00569a 2271 if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
e50912db 2272 if (TMath::Abs(hI-1.5)<0.01) // SPDouter
ae00569a 2273 if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
67c1e979 2274
ae00569a 2275
afd25725 2276 Double_t oldGlobXYZ[3];
d1181f10 2277 if (!track->GetXYZ(oldGlobXYZ)) return kFALSE;
afd25725 2278
67178f34 2279 // continue if we are already beyond this layer
2280 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
2281 if(step>0 && oldGlobR > r) continue; // going outward
2282 if(step<0 && oldGlobR < r) continue; // going inward
2283
8602c008 2284 Double_t phi,z;
ae00569a 2285 if (!track->GetPhiZat(r,phi,z)) return kFALSE;
67c1e979 2286
67c1e979 2287 Int_t idet=layer.FindDetectorIndex(phi,z);
6518a6c5 2288
2289 // check if we allow a prolongation without point for large-eta tracks
ae00569a 2290 Int_t skip = CheckSkipLayer(track,ilayer,idet);
6518a6c5 2291 if (skip==2) {
ae00569a 2292 modstatus = 4; // out in z
d1181f10 2293 if(LocalModuleCoord(ilayer,idet,track,xloc,zloc)) { // local module coords
2294 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2295 }
7131593b 2296 // cross layer
2297 // apply correction for material of the current layer
2298 // add time if going outward
2299 CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir);
6518a6c5 2300 continue;
2301 }
2302
e50912db 2303 if (idet<0) return kFALSE;
ae00569a 2304
4fa7f7d1 2305
67c1e979 2306 const AliITSdetector &det=layer.GetDetector(idet);
1c97ce2f 2307 if (!track->Propagate(det.GetPhi(),det.GetR())) return kFALSE;
23197852 2308
ae00569a 2309 track->SetDetectorIndex(idet);
d1181f10 2310 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
67c1e979 2311
23197852 2312 Double_t dz,zmin,zmax,dy,ymin,ymax;
ae00569a 2313
2314 const AliITSRecPoint *clAcc=0;
44347160 2315 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
67c1e979 2316
6518a6c5 2317 Int_t idx=index[ilayer];
ae00569a 2318 if (idx>=0) { // cluster in this layer
2319 modstatus = 6; // no refit
2320 const AliITSRecPoint *cl=(AliITSRecPoint *)GetCluster(idx);
2321 if (cl) {
2322 if (idet != cl->GetDetectorIndex()) {
2323 idet=cl->GetDetectorIndex();
a5d0fae6 2324 const AliITSdetector &detc=layer.GetDetector(idet);
2325 if (!track->Propagate(detc.GetPhi(),detc.GetR())) return kFALSE;
ae00569a 2326 track->SetDetectorIndex(idet);
d1181f10 2327 if(!LocalModuleCoord(ilayer,idet,track,xloc,zloc)) return kFALSE; // local module coords
ae00569a 2328 }
ae00569a 2329 Int_t cllayer = (idx & 0xf0000000) >> 28;;
2330 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
2331 if (chi2<maxchi2) {
2332 clAcc=cl;
2333 maxchi2=chi2;
2334 modstatus = 1; // found
2335 } else {
7167ae53 2336 return kFALSE; //
ae00569a 2337 }
2338 }
2339 } else { // no cluster in this layer
2340 if (skip==1) {
2341 modstatus = 3; // skipped
0ed58a47 2342 // Plane Eff determination:
2343 if (planeeff && ilayer==AliITSReconstructor::GetRecoParam()->GetIPlanePlaneEff()) {
2344 if (IsOKForPlaneEff(track,clusters,ilayer)) // only adequate track for plane eff. evaluation
2345 UseTrackForPlaneEff(track,ilayer);
7167ae53 2346 }
ae00569a 2347 } else {
2348 modstatus = 5; // no cls in road
2349 // check dead
1c97ce2f 2350 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2351 dz = 0.5*(zmax-zmin);
2352 dy = 0.5*(ymax-ymin);
2353 Int_t dead = CheckDeadZone(track,ilayer,idet,dz,dy,kTRUE);
ae00569a 2354 if (dead==1) modstatus = 7; // holes in z in SPD
f8720bda 2355 if (dead==2 || dead==3 || dead==4) modstatus = 2; // dead from OCDB
ae00569a 2356 }
e43c066c 2357 }
ae00569a 2358
2359 if (clAcc) {
2360 if (!UpdateMI(track,clAcc,maxchi2,idx)) return kFALSE;
09cf9d66 2361 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
e43c066c 2362 }
ae00569a 2363 track->SetModuleIndexInfo(ilayer,idet,modstatus,xloc,zloc);
2364
2365
2366 if (extra) { // search for extra clusters in overlapped modules
2367 AliITStrackV2 tmp(*track);
1c97ce2f 2368 if (!ComputeRoad(track,ilayer,idet,zmin,zmax,ymin,ymax)) return kFALSE;
2369 layer.SelectClusters(zmin,zmax,ymin,ymax);
ae00569a 2370
2371 const AliITSRecPoint *clExtra=0; Int_t ci=-1,cci=-1;
2372 Int_t idetExtra=-1;
a5d0fae6 2373 maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
2374 Double_t tolerance=0.1;
ae00569a 2375 while ((clExtra=layer.GetNextCluster(ci))!=0) {
2376 // only clusters in another module! (overlaps)
2377 idetExtra = clExtra->GetDetectorIndex();
2378 if (idet == idetExtra) continue;
2379
a5d0fae6 2380 const AliITSdetector &detx=layer.GetDetector(idetExtra);
ae00569a 2381
1c97ce2f 2382 if (!tmp.Propagate(detx.GetPhi(),detx.GetR()+clExtra->GetX())) continue;
ae00569a 2383 if (TMath::Abs(tmp.GetZ() - clExtra->GetZ()) > tolerance) continue;
2384 if (TMath::Abs(tmp.GetY() - clExtra->GetY()) > tolerance) continue;
1c97ce2f 2385 if (!tmp.Propagate(detx.GetPhi(),detx.GetR())) continue;
ae00569a 2386
2387 Double_t chi2=tmp.GetPredictedChi2(clExtra);
2388 if (chi2<maxchi2) { maxchi2=chi2; cci=ci; }
2389 }
2390 if (cci>=0) {
2391 track->SetExtraCluster(ilayer,(ilayer<<28)+cci);
2392 track->SetExtraModule(ilayer,idetExtra);
2393 }
2394 } // end search for extra clusters in overlapped modules
1c97ce2f 2395
afd25725 2396 // Correct for material of the current layer
7131593b 2397 // cross material
2398 // add time if going outward
ae00569a 2399 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)) return kFALSE;
e43c066c 2400
ae00569a 2401 } // end loop on layers
2402
db355ee7 2403 if (!track->PropagateTo(xx,0.,0.)) return kFALSE;
e43c066c 2404
e43c066c 2405 return kTRUE;
2406}
44347160 2407//------------------------------------------------------------------------
15dd636f 2408Double_t AliITStrackerMI::GetNormalizedChi2(AliITStrackMI * track, Int_t mode)
e43c066c 2409{
2410 //
2411 // calculate normalized chi2
2412 // return NormalizedChi2(track,0);
2413 Float_t chi2 = 0;
2414 Float_t sum=0;
2415 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2416 // track->fdEdxMismatch=0;
2417 Float_t dedxmismatch =0;
2418 Float_t *ny = GetNy(fCurrentEsdTrack), *nz = GetNz(fCurrentEsdTrack);
2419 if (mode<100){
2420 for (Int_t i = 0;i<6;i++){
9fd412a8 2421 if (track->GetClIndex(i)>=0){
e43c066c 2422 Float_t cerry, cerrz;
2423 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
2424 else
b9671574 2425 { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2426 cerry*=cerry;
2427 cerrz*=cerrz;
b9671574 2428 Float_t cchi2 = (track->GetDy(i)*track->GetDy(i)/cerry)+(track->GetDz(i)*track->GetDz(i)/cerrz);
572f41f9 2429 if (i>1 && AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(i)) {
b9671574 2430 Float_t ratio = track->GetNormQ(i)/track->GetExpQ();
e43c066c 2431 if (ratio<0.5) {
2432 cchi2+=(0.5-ratio)*10.;
2433 //track->fdEdxMismatch+=(0.5-ratio)*10.;
2434 dedxmismatch+=(0.5-ratio)*10.;
2435 }
2436 }
2437 if (i<2 ||i>3){
b9671574 2438 AliITSRecPoint * cl = (AliITSRecPoint*)GetCluster( track->GetClIndex(i));
e43c066c 2439 Double_t delta = cl->GetNy()+cl->GetNz()-ny[i]-nz[i];
2440 if (delta>1) chi2 +=0.5*TMath::Min(delta/2,2.);
2441 if (i<2) chi2+=2*cl->GetDeltaProbability();
2442 }
2443 chi2+=cchi2;
2444 sum++;
2445 }
2446 }
b9671574 2447 if (TMath::Abs(track->GetdEdxMismatch()-dedxmismatch)>0.0001){
2448 track->SetdEdxMismatch(dedxmismatch);
e43c066c 2449 }
2450 }
2451 else{
2452 for (Int_t i = 0;i<4;i++){
9fd412a8 2453 if (track->GetClIndex(i)>=0){
e43c066c 2454 Float_t cerry, cerrz;
2455 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 2456 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2457 cerry*=cerry;
2458 cerrz*=cerrz;
b9671574 2459 chi2+= (track->GetDy(i)*track->GetDy(i)/cerry);
2460 chi2+= (track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 2461 sum++;
2462 }
2463 }
2464 for (Int_t i = 4;i<6;i++){
9fd412a8 2465 if (track->GetClIndex(i)>=0){
e43c066c 2466 Float_t cerry, cerrz;
2467 if (ny[i]>0) {cerry = erry[i]; cerrz=errz[i];}
b9671574 2468 else { cerry= track->GetSigmaY(i); cerrz = track->GetSigmaZ(i);}
e43c066c 2469 cerry*=cerry;
2470 cerrz*=cerrz;
2471 Float_t cerryb, cerrzb;
2472 if (ny[i+6]>0) {cerryb = erry[i+6]; cerrzb=errz[i+6];}
b9671574 2473 else { cerryb= track->GetSigmaY(i+6); cerrzb = track->GetSigmaZ(i+6);}
e43c066c 2474 cerryb*=cerryb;
2475 cerrzb*=cerrzb;
b9671574 2476 chi2+= TMath::Min((track->GetDy(i+6)*track->GetDy(i+6)/cerryb),track->GetDy(i)*track->GetDy(i)/cerry);
2477 chi2+= TMath::Min((track->GetDz(i+6)*track->GetDz(i+6)/cerrzb),track->GetDz(i)*track->GetDz(i)/cerrz);
e43c066c 2478 sum++;
2479 }
2480 }
2481 }
b9671574 2482 if (track->GetESDtrack()->GetTPCsignal()>85){
2483 Float_t ratio = track->GetdEdx()/track->GetESDtrack()->GetTPCsignal();
e43c066c 2484 if (ratio<0.5) {
2485 chi2+=(0.5-ratio)*5.;
2486 }
2487 if (ratio>2){
2488 chi2+=(ratio-2.0)*3;
2489 }
2490 }
2491 //
b9671574 2492 Double_t match = TMath::Sqrt(track->GetChi22());
2493 if (track->GetConstrain()) match/=track->GetNumberOfClusters();
2755f080 2494 if (!track->GetConstrain()) {
2495 if (track->GetNumberOfClusters()>2) {
2496 match/=track->GetNumberOfClusters()-2.;
2497 } else {
2498 match=0;
2499 }
2500 }
e43c066c 2501 if (match<0) match=0;
f8720bda 2502
2503 // penalty factor for missing points (NDeadZone>0), but no penalty
2504 // for layer with deadZoneProb close to 1 (either we wanted to skip layer
2505 // or there is a dead from OCDB)
2506 Float_t deadzonefactor = 0.;
2507 if (track->GetNDeadZone()>0.) {
2508 Float_t sumDeadZoneProbability=0;
2509 for(Int_t ilay=0;ilay<6;ilay++) sumDeadZoneProbability+=track->GetDeadZoneProbability(ilay);
2510 Float_t nDeadZoneWithProbNot1=(Float_t)(track->GetNDeadZone())-sumDeadZoneProbability;
2511 if(nDeadZoneWithProbNot1>0.) {
2512 Float_t deadZoneProbability = sumDeadZoneProbability - (Float_t)((Int_t)sumDeadZoneProbability);
2513 deadZoneProbability /= nDeadZoneWithProbNot1;
2514 deadzonefactor = 3.*(1.1-deadZoneProbability);
2515 }
2516 }
2517
b9671574 2518 Double_t normchi2 = 2*track->GetNSkipped()+match+deadzonefactor+(1+(2*track->GetNSkipped()+deadzonefactor)/track->GetNumberOfClusters())*
2519 (chi2)/TMath::Max(double(sum-track->GetNSkipped()),
2520 1./(1.+track->GetNSkipped()));
e43c066c 2521
2522 return normchi2;
2523}
44347160 2524//------------------------------------------------------------------------
a70ed6ad 2525Double_t AliITStrackerMI::GetMatchingChi2(const AliITStrackMI * track1,const AliITStrackMI * track2)
e43c066c 2526{
2527 //
2528 // return matching chi2 between two tracks
d1181f10 2529 Double_t largeChi2=1000.;
2530
15dd636f 2531 AliITStrackMI track3(*track2);
d1181f10 2532 if (!track3.Propagate(track1->GetAlpha(),track1->GetX())) return largeChi2;
e43c066c 2533 TMatrixD vec(5,1);
6c94f330 2534 vec(0,0)=track1->GetY() - track3.GetY();
2535 vec(1,0)=track1->GetZ() - track3.GetZ();
2536 vec(2,0)=track1->GetSnp() - track3.GetSnp();
2537 vec(3,0)=track1->GetTgl() - track3.GetTgl();
6c23ffed 2538 vec(4,0)=track1->GetSigned1Pt() - track3.GetSigned1Pt();
e43c066c 2539 //
2540 TMatrixD cov(5,5);
6c94f330 2541 cov(0,0) = track1->GetSigmaY2()+track3.GetSigmaY2();
2542 cov(1,1) = track1->GetSigmaZ2()+track3.GetSigmaZ2();
2543 cov(2,2) = track1->GetSigmaSnp2()+track3.GetSigmaSnp2();
2544 cov(3,3) = track1->GetSigmaTgl2()+track3.GetSigmaTgl2();
2545 cov(4,4) = track1->GetSigma1Pt2()+track3.GetSigma1Pt2();
e43c066c 2546
6c94f330 2547 cov(0,1)=cov(1,0) = track1->GetSigmaZY()+track3.GetSigmaZY();
2548 cov(0,2)=cov(2,0) = track1->GetSigmaSnpY()+track3.GetSigmaSnpY();
2549 cov(0,3)=cov(3,0) = track1->GetSigmaTglY()+track3.GetSigmaTglY();
2550 cov(0,4)=cov(4,0) = track1->GetSigma1PtY()+track3.GetSigma1PtY();
e43c066c 2551 //
6c94f330 2552 cov(1,2)=cov(2,1) = track1->GetSigmaSnpZ()+track3.GetSigmaSnpZ();
2553 cov(1,3)=cov(3,1) = track1->GetSigmaTglZ()+track3.GetSigmaTglZ();
2554 cov(1,4)=cov(4,1) = track1->GetSigma1PtZ()+track3.GetSigma1PtZ();
e43c066c 2555 //
6c94f330 2556 cov(2,3)=cov(3,2) = track1->GetSigmaTglSnp()+track3.GetSigmaTglSnp();
2557 cov(2,4)=cov(4,2) = track1->GetSigma1PtSnp()+track3.GetSigma1PtSnp();
e43c066c 2558 //
6c94f330 2559 cov(3,4)=cov(4,3) = track1->GetSigma1PtTgl()+track3.GetSigma1PtTgl();
e43c066c 2560
2561 cov.Invert();
2562 TMatrixD vec2(cov,TMatrixD::kMult,vec);
2563 TMatrixD chi2(vec2,TMatrixD::kTransposeMult,vec);
2564 return chi2(0,0);
2565}
44347160 2566//------------------------------------------------------------------------
a70ed6ad 2567Double_t AliITStrackerMI::GetSPDDeadZoneProbability(Double_t zpos, Double_t zerr) const
e43c066c 2568{
2569 //
afd25725 2570 // return probability that given point (characterized by z position and error)
2571 // is in SPD dead zone
e43c066c 2572 //
afd25725 2573 Double_t probability = 0.;
e43c066c 2574 Double_t absz = TMath::Abs(zpos);
afd25725 2575 Double_t nearestz = (absz<2.) ? 0.5*(fSPDdetzcentre[1]+fSPDdetzcentre[2]) :
2576 0.5*(fSPDdetzcentre[2]+fSPDdetzcentre[3]);
2577 if (TMath::Abs(absz-nearestz)>0.25+3.*zerr) return probability;
2578 Double_t zmin, zmax;
2579 if (zpos<-6.) { // dead zone at z = -7
e50912db 2580 zmin = fSPDdetzcentre[0] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2581 zmax = fSPDdetzcentre[1] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2582 } else if (zpos>6.) { // dead zone at z = +7
e50912db 2583 zmin = fSPDdetzcentre[2] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2584 zmax = fSPDdetzcentre[3] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2585 } else if (absz<2.) { // dead zone at z = 0
e50912db 2586 zmin = fSPDdetzcentre[1] + 0.5*AliITSRecoParam::GetSPDdetzlength();
2587 zmax = fSPDdetzcentre[2] - 0.5*AliITSRecoParam::GetSPDdetzlength();
afd25725 2588 } else {
2589 zmin = 0.;
2590 zmax = 0.;
e43c066c 2591 }
afd25725 2592 // probability that the true z is in the range [zmin,zmax] (i.e. inside
2593 // dead zone)
2594 probability = 0.5*( TMath::Erf((zpos-zmin)/zerr/TMath::Sqrt(2.)) -
2595 TMath::Erf((zpos-zmax)/zerr/TMath::Sqrt(2.)) );
e43c066c 2596 return probability;
2597}
44347160 2598//------------------------------------------------------------------------
a70ed6ad 2599Double_t AliITStrackerMI::GetTruncatedChi2(const AliITStrackMI * track, Float_t fac)
e43c066c 2600{
2601 //
2602 // calculate normalized chi2
2603 Float_t chi2[6];
2604 Float_t *erry = GetErrY(fCurrentEsdTrack), *errz = GetErrZ(fCurrentEsdTrack);
2605 Float_t ncl = 0;
2606 for (Int_t i = 0;i<6;i++){
b9671574 2607 if (TMath::Abs(track->GetDy(i))>0){
2608 chi2[i]= (track->GetDy(i)/erry[i])*(track->GetDy(i)/erry[i]);
2609 chi2[i]+= (track->GetDz(i)/errz[i])*(track->GetDz(i)/errz[i]);
e43c066c 2610 ncl++;
2611 }
2612 else{chi2[i]=10000;}
2613 }
2614 Int_t index[6];
2615 TMath::Sort(6,chi2,index,kFALSE);
2616 Float_t max = float(ncl)*fac-1.;
2617 Float_t sumchi=0, sumweight=0;
2618 for (Int_t i=0;i<max+1;i++){
2619 Float_t weight = (i<max)?1.:(max+1.-i);
2620 sumchi+=weight*chi2[index[i]];
2621 sumweight+=weight;
2622 }
2623 Double_t normchi2 = sumchi/sumweight;
2624 return normchi2;
2625}
44347160 2626//------------------------------------------------------------------------
a70ed6ad 2627Double_t AliITStrackerMI::GetInterpolatedChi2(const AliITStrackMI * forwardtrack,const AliITStrackMI * backtrack)
e43c066c 2628{
2629 //
2630 // calculate normalized chi2
2631 // if (forwardtrack->fNUsed>0.3*float(forwardtrack->GetNumberOfClusters())) return 10000;
2632 Int_t npoints = 0;
2633 Double_t res =0;
2634 for (Int_t i=0;i<6;i++){
b9671574 2635 if ( (backtrack->GetSigmaY(i)<0.000000001) || (forwardtrack->GetSigmaY(i)<0.000000001)) continue;
2636 Double_t sy1 = forwardtrack->GetSigmaY(i);
2637 Double_t sz1 = forwardtrack->GetSigmaZ(i);
2638 Double_t sy2 = backtrack->GetSigmaY(i);
2639 Double_t sz2 = backtrack->GetSigmaZ(i);
e43c066c 2640 if (i<2){ sy2=1000.;sz2=1000;}
2641 //
b9671574 2642 Double_t dy0 = (forwardtrack->GetDy(i)/(sy1*sy1) +backtrack->GetDy(i)/(sy2*sy2))/(1./(sy1*sy1)+1./(sy2*sy2));
2643 Double_t dz0 = (forwardtrack->GetDz(i)/(sz1*sz1) +backtrack->GetDz(i)/(sz2*sz2))/(1./(sz1*sz1)+1./(sz2*sz2));
e43c066c 2644 //
2645 Double_t nz0 = dz0*TMath::Sqrt((1./(sz1*sz1)+1./(sz2*sz2)));
2646 Double_t ny0 = dy0*TMath::Sqrt((1./(sy1*sy1)+1./(sy2*sy2)));
2647 //
2648 res+= nz0*nz0+ny0*ny0;
2649 npoints++;
2650 }
2651 if (npoints>1) return
6c23ffed 2652 TMath::Max(0.3*forwardtrack->OneOverPt()-0.5,0.)+
e43c066c 2653 //2*forwardtrack->fNUsed+
b9671574 2654 res/TMath::Max(double(npoints-forwardtrack->GetNSkipped()),
2655 1./(1.+forwardtrack->GetNSkipped()));
e43c066c 2656 return 1000;
2657}
44347160 2658//------------------------------------------------------------------------
e43c066c 2659Float_t *AliITStrackerMI::GetWeight(Int_t index) {
2660 //--------------------------------------------------------------------
2661 // Return pointer to a given cluster
2662 //--------------------------------------------------------------------
2663 Int_t l=(index & 0xf0000000) >> 28;
2664 Int_t c=(index & 0x0fffffff) >> 00;
2665 return fgLayers[l].GetWeight(c);
2666}
44347160 2667//------------------------------------------------------------------------
a70ed6ad 2668void AliITStrackerMI::RegisterClusterTracks(const AliITStrackMI* track,Int_t id)
e43c066c 2669{
2670 //---------------------------------------------
2671 // register track to the list
628e7bb0 2672 //
b9671574 2673 if (track->GetESDtrack()->GetKinkIndex(0)!=0) return; //don't register kink tracks
628e7bb0 2674 //
2675 //
e43c066c 2676 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2677 Int_t index = track->GetClusterIndex(icluster);
2678 Int_t l=(index & 0xf0000000) >> 28;
2679 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2680 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2681 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2682 if (fgLayers[l].GetClusterTracks(itrack,c)<0){
2683 fgLayers[l].SetClusterTracks(itrack,c,id);
e43c066c 2684 break;
2685 }
2686 }
2687 }
2688}
44347160 2689//------------------------------------------------------------------------
a70ed6ad 2690void AliITStrackerMI::UnRegisterClusterTracks(const AliITStrackMI* track, Int_t id)
e43c066c 2691{
2692 //---------------------------------------------
2693 // unregister track from the list
2694 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2695 Int_t index = track->GetClusterIndex(icluster);
2696 Int_t l=(index & 0xf0000000) >> 28;
2697 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2698 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2699 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2700 if (fgLayers[l].GetClusterTracks(itrack,c)==id){
2701 fgLayers[l].SetClusterTracks(itrack,c,-1);
e43c066c 2702 }
2703 }
2704 }
2705}
44347160 2706//------------------------------------------------------------------------
00a7cc50 2707Float_t AliITStrackerMI::GetNumberOfSharedClusters(AliITStrackMI* track,Int_t id, Int_t list[6], AliITSRecPoint *clist[6])
e43c066c 2708{
2709 //-------------------------------------------------------------
2710 //get number of shared clusters
2711 //-------------------------------------------------------------
2712 Float_t shared=0;
2713 for (Int_t i=0;i<6;i++) { list[i]=-1, clist[i]=0;}
2714 // mean number of clusters
2715 Float_t *ny = GetNy(id), *nz = GetNz(id);
2716
2717
2718 for (Int_t icluster=0;icluster<track->GetNumberOfClusters();icluster++){
2719 Int_t index = track->GetClusterIndex(icluster);
2720 Int_t l=(index & 0xf0000000) >> 28;
2721 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2722 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2723 if (ny[l]==0){
2724 printf("problem\n");
2725 }
00a7cc50 2726 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2727 Float_t weight=1;
2728 //
2729 Float_t deltan = 0;
2730 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
572f41f9 2731 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2732 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2733 if (l<2 || l>3){
2734 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2735 }
2736 else{
2737 deltan = (cl->GetNz()-nz[l]);
2738 }
2739 if (deltan>2.0) continue; // extended - highly probable shared cluster
2740 weight = 2./TMath::Max(3.+deltan,2.);
2741 //
2742 for (Int_t itrack=0;itrack<4;itrack++){
b9671574 2743 if (fgLayers[l].GetClusterTracks(itrack,c)>=0 && fgLayers[l].GetClusterTracks(itrack,c)!=id){
e43c066c 2744 list[l]=index;
00a7cc50 2745 clist[l] = (AliITSRecPoint*)GetCluster(index);
e43c066c 2746 shared+=weight;
2747 break;
2748 }
2749 }
2750 }
b9671574 2751 track->SetNUsed(shared);
e43c066c 2752 return shared;
2753}
44347160 2754//------------------------------------------------------------------------
a70ed6ad 2755Int_t AliITStrackerMI::GetOverlapTrack(const AliITStrackMI *track, Int_t trackID, Int_t &shared, Int_t clusterlist[6],Int_t overlist[6])
e43c066c 2756{
2757 //
2758 // find first shared track
2759 //
2760 // mean number of clusters
2761 Float_t *ny = GetNy(trackID), *nz = GetNz(trackID);
2762 //
2763 for (Int_t i=0;i<6;i++) overlist[i]=-1;
2764 Int_t sharedtrack=100000;
2765 Int_t tracks[24],trackindex=0;
2766 for (Int_t i=0;i<24;i++) {tracks[i]=-1;}
2767 //
2768 for (Int_t icluster=0;icluster<6;icluster++){
2769 if (clusterlist[icluster]<0) continue;
2770 Int_t index = clusterlist[icluster];
2771 Int_t l=(index & 0xf0000000) >> 28;
2772 Int_t c=(index & 0x0fffffff) >> 00;
2773 if (ny[l]==0){
2774 printf("problem\n");
2775 }
b9671574 2776 if (c>fgLayers[l].GetNumberOfClusters()) continue;
e43c066c 2777 //if (l>3) continue;
00a7cc50 2778 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2779 //
2780 Float_t deltan = 0;
2781 if (l>3&&cl->GetNy()+cl->GetNz()>6) continue;
572f41f9 2782 if (l>2&&AliITSReconstructor::GetRecoParam()->GetUseAmplitudeInfo(l))
2783 if (track->GetNormQ(l)/track->GetExpQ()>3.5) continue;
e43c066c 2784 if (l<2 || l>3){
2785 deltan = (cl->GetNy()+cl->GetNz()-ny[l]-nz[l]);
2786 }
2787 else{
2788 deltan = (cl->GetNz()-nz[l]);
2789 }
2790 if (deltan>2.0) continue; // extended - highly probable shared cluster
2791 //
2792 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2793 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2794 if (fgLayers[l].GetClusterTracks(itrack,c)!=trackID){
2795 tracks[trackindex] = fgLayers[l].GetClusterTracks(itrack,c);
e43c066c 2796 trackindex++;
2797 }
2798 }
2799 }
2800 if (trackindex==0) return -1;
2801 if (trackindex==1){
2802 sharedtrack = tracks[0];
2803 }else{
2804 if (trackindex==2) sharedtrack =TMath::Min(tracks[0],tracks[1]);
2805 else{
2806 //
a5d0fae6 2807 Int_t tracks2[24], cluster[24];
2808 for (Int_t i=0;i<trackindex;i++){ tracks2[i]=-1; cluster[i]=0;}
e43c066c 2809 Int_t index =0;
2810 //
2811 for (Int_t i=0;i<trackindex;i++){
2812 if (tracks[i]<0) continue;
a5d0fae6 2813 tracks2[index] = tracks[i];
e43c066c 2814 cluster[index]++;
2815 for (Int_t j=i+1;j<trackindex;j++){
2816 if (tracks[j]<0) continue;
2817 if (tracks[j]==tracks[i]){
2818 cluster[index]++;
2819 tracks[j]=-1;
2820 }
2821 }
2822 index++;
2823 }
2824 Int_t max=0;
2825 for (Int_t i=0;i<index;i++){
2826 if (cluster[index]>max) {
a5d0fae6 2827 sharedtrack=tracks2[index];
e43c066c 2828 max=cluster[index];
2829 }
2830 }
2831 }
2832 }
2833
2834 if (sharedtrack>=100000) return -1;
2835 //
2836 // make list of overlaps
2837 shared =0;
2838 for (Int_t icluster=0;icluster<6;icluster++){
2839 if (clusterlist[icluster]<0) continue;
2840 Int_t index = clusterlist[icluster];
2841 Int_t l=(index & 0xf0000000) >> 28;
2842 Int_t c=(index & 0x0fffffff) >> 00;
b9671574 2843 if (c>fgLayers[l].GetNumberOfClusters()) continue;
00a7cc50 2844 AliITSRecPoint *cl = (AliITSRecPoint*)GetCluster(index);
e43c066c 2845 if (l==0 || l==1){
2846 if (cl->GetNy()>2) continue;
2847 if (cl->GetNz()>2) continue;
2848 }
2849 if (l==4 || l==5){
2850 if (cl->GetNy()>3) continue;
2851 if (cl->GetNz()>3) continue;
2852 }
2853 //
2854 for (Int_t itrack=3;itrack>=0;itrack--){
b9671574 2855 if (fgLayers[l].GetClusterTracks(itrack,c)<0) continue;
2856 if (fgLayers[l].GetClusterTracks(itrack,c)==sharedtrack){
e43c066c 2857 overlist[l]=index;
2858 shared++;
2859 }
2860 }
2861 }
2862 return sharedtrack;
2863}
44347160 2864//------------------------------------------------------------------------
15dd636f 2865AliITStrackMI * AliITStrackerMI::GetBest2Tracks(Int_t trackID1, Int_t trackID2, Float_t th0, Float_t th1){
e43c066c 2866 //
2867 // try to find track hypothesys without conflicts
2868 // with minimal chi2;
2869 TClonesArray *arr1 = (TClonesArray*)fTrackHypothesys.At(trackID1);
2870 Int_t entries1 = arr1->GetEntriesFast();
2871 TClonesArray *arr2 = (TClonesArray*)fTrackHypothesys.At(trackID2);
15dd636f 2872 if (!arr2) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2873 Int_t entries2 = arr2->GetEntriesFast();
15dd636f 2874 if (entries2<=0) return (AliITStrackMI*) arr1->UncheckedAt(0);
e43c066c 2875 //
15dd636f 2876 AliITStrackMI * track10=(AliITStrackMI*) arr1->UncheckedAt(0);
2877 AliITStrackMI * track20=(AliITStrackMI*) arr2->UncheckedAt(0);
6c23ffed 2878 if (track10->Pt()>0.5+track20->Pt()) return track10;
e43c066c 2879
2880 for (Int_t itrack=0;itrack<entries1;itrack++){
15dd636f 2881 AliITStrackMI * track=(AliITStrackMI*) arr1->UncheckedAt(itrack);
e43c066c 2882 UnRegisterClusterTracks(track,trackID1);
2883 }
2884 //
2885 for (Int_t itrack=0;itrack<entries2;itrack++){
15dd636f 2886 AliITStrackMI * track=(AliITStrackMI*) arr2->UncheckedAt(itrack);
e43c066c 2887 UnRegisterClusterTracks(track,trackID2);
2888 }
2889 Int_t index1=0;
2890 Int_t index2=0;
2891 Float_t maxconflicts=6;
2892 Double_t maxchi2 =1000.;
2893 //
2894 // get weight of hypothesys - using best hypothesy
2895 Double_t w1,w2;
2896
2897 Int_t list1[6],list2[6];
00a7cc50 2898 AliITSRecPoint *clist1[6], *clist2[6] ;
e43c066c 2899 RegisterClusterTracks(track10,trackID1);
2900 RegisterClusterTracks(track20,trackID2);
2901 Float_t conflict1 = GetNumberOfSharedClusters(track10,trackID1,list1,clist1);
2902 Float_t conflict2 = GetNumberOfSharedClusters(track20,trackID2,list2,clist2);
2903 UnRegisterClusterTracks(track10,trackID1);
2904 UnRegisterClusterTracks(track20,trackID2);
2905 //
2906 // normalized chi2
2907 Float_t chi21 =0,chi22=0,ncl1=0,ncl2=0;
2908 Float_t nerry[6],nerrz[6];
2909 Float_t *erry1=GetErrY(trackID1),*errz1 = GetErrZ(trackID1);
2910 Float_t *erry2=GetErrY(trackID2),*errz2 = GetErrZ(trackID2);
2911 for (Int_t i=0;i<6;i++){
2912 if ( (erry1[i]>0) && (erry2[i]>0)) {
2913 nerry[i] = TMath::Min(erry1[i],erry2[i]);
2914 nerrz[i] = TMath::Min(errz1[i],errz2[i]);
2915 }else{
2916 nerry[i] = TMath::Max(erry1[i],erry2[i]);
2917 nerrz[i] = TMath::Max(errz1[i],errz2[i]);
2918 }
b9671574 2919 if (TMath::Abs(track10->GetDy(i))>0.000000000000001){
2920 chi21 += track10->GetDy(i)*track10->GetDy(i)/(nerry[i]*nerry[i]);
2921 chi21 += track10->GetDz(i)*track10->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2922 ncl1++;
2923 }
b9671574 2924 if (TMath::Abs(track20->GetDy(i))>0.000000000000001){
2925 chi22 += track20->GetDy(i)*track20->GetDy(i)/(nerry[i]*nerry[i]);
2926 chi22 += track20->GetDz(i)*track20->GetDz(i)/(nerrz[i]*nerrz[i]);
e43c066c 2927 ncl2++;
2928 }
2929 }
2930 chi21/=ncl1;
2931 chi22/=ncl2;
2932 //
2933 //
b9671574 2934 Float_t d1 = TMath::Sqrt(track10->GetD(0)*track10->GetD(0)+track10->GetD(1)*track10->GetD(1))+0.1;
2935 Float_t d2 = TMath::Sqrt(track20->GetD(0)*track20->GetD(0)+track20->GetD(1)*track20->GetD(1))+0.1;
e43c066c 2936 Float_t s1 = TMath::Sqrt(track10->GetSigmaY2()*track10->GetSigmaZ2());
2937 Float_t s2 = TMath::Sqrt(track20->GetSigmaY2()*track20->GetSigmaZ2());
2938 //
2939 w1 = (d2/(d1+d2)+ 2*s2/(s1+s2)+
2940 +s2/(s1+s2)*0.5*(chi22+2.)/(chi21+chi22+4.)
6c23ffed 2941 +1.*track10->Pt()/(track10->Pt()+track20->Pt())
e43c066c 2942 );
2943 w2 = (d1/(d1+d2)+ 2*s1/(s1+s2)+
2944 s1/(s1+s2)*0.5*(chi21+2.)/(chi21+chi22+4.)
6c23ffed 2945 +1.*track20->Pt()/(track10->Pt()+track20->Pt())
e43c066c 2946 );
2947
2948 Double_t sumw = w1+w2;
2949 w1/=sumw;
2950 w2/=sumw;
2951 if (w1<w2*0.5) {
2952 w1 = (d2+0.5)/(d1+d2+1.);
2953 w2 = (d1+0.5)/(d1+d2+1.);
2954 }
2955 // Float_t maxmax = w1*track10->fChi2MIP[0]+w2*track20->fChi2MIP[0]+w1*conflict1+w2*conflict2+1.;
2956 //Float_t maxconflicts0 = w1*conflict1+w2*conflict2;
2957 //
2958 // get pair of "best" hypothesys
2959 //
2960 Float_t * ny1 = GetNy(trackID1), * nz1 = GetNz(trackID1);
2961 Float_t * ny2 = GetNy(trackID2), * nz2 = GetNz(trackID2);
2962
2963 for (Int_t itrack1=0;itrack1<entries1;itrack1++){
15dd636f 2964 AliITStrackMI * track1=(AliITStrackMI*) arr1->UncheckedAt(itrack1);
e43c066c 2965 //if (track1->fFakeRatio>0) continue;
2966 RegisterClusterTracks(track1,trackID1);
2967 for (Int_t itrack2=0;itrack2<entries2;itrack2++){
15dd636f