coverity fix
[u/mrichter/AliRoot.git] / ITS / UPGRADE / AliITStrackerUpgrade.cxx
CommitLineData
1d9af2d5 1/**************************************************************************
2 * Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
18////////////////////////////////////////////////////
19// ITS Upgrade Stand alone tracker class //
20// Authors: A.Mastroserio C.Terrevoli //
21// e-mail:annalisa.mastroserio@cern.ch //
22// cristina.terrevoli@ba.infn.it //
23////////////////////////////////////////////////////
24
25#include <stdlib.h>
26
27#include <TArrayI.h>
28#include <TBranch.h>
29#include <TObjArray.h>
30#include <TTree.h>
31#include "AliRunLoader.h"
32#include "AliITSLoader.h"
33#include "AliESDEvent.h"
34#include "AliESDVertex.h"
35#include "AliESDtrack.h"
36#include "AliITSVertexer.h"
37#include "AliITSclusterTable.h"
0ac80088 38#include "AliITSRecPointU.h"
0b255a22 39#include "AliITStrackU.h"
1d9af2d5 40#include "AliITStrackerMI.h"
41#include "AliITSlayerUpgrade.h"
42#include "AliITSsegmentationUpgrade.h"
43#include "AliITStrackerUpgrade.h"
44#include "AliITSReconstructor.h"
45#include "AliLog.h"
46#include "AliRun.h"
47
48ClassImp(AliITStrackerUpgrade)
49
50//____________________________________________________________________________
556b741c 51 AliITStrackerUpgrade::AliITStrackerUpgrade():
52 AliITStrackerMI(),
53 fNLayers(), fPhiEstimate(0), fITSStandAlone(0), fLambdac(0),
54 fPhic(0), fCoef1(0), fCoef2(0), fCoef3(0), fNloop(0),
55 fPhiWin(0), fLambdaWin(0), fVert(0), fVertexer(0),
56 fListOfTracks(0), fListOfUTracks(0), fITSclusters(0),
57 fInwardFlag(0), fOuterStartLayer(0), fInnerStartLayer(0),
58 fMinNPoints(0), fMinQ(0), fTrackToFollow(), fLayers(0), fSegmentation(0x0),
59 fCluLayer(0), fCluCoord(0)
4211bbc5 60{
61 // Default constructor
62 Init();
665c0bc7 63
4211bbc5 64}
65//____________________________________________________________________________
556b741c 66AliITStrackerUpgrade::AliITStrackerUpgrade(Int_t nLay):
67 AliITStrackerMI(),
68 fNLayers(nLay), fPhiEstimate(0), fITSStandAlone(0), fLambdac(0),
69 fPhic(0), fCoef1(0), fCoef2(0), fCoef3(0), fNloop(0),
70 fPhiWin(0), fLambdaWin(0), fVert(0), fVertexer(0),
71 fListOfTracks(0), fListOfUTracks(0), fITSclusters(0),
72 fInwardFlag(0), fOuterStartLayer(0), fInnerStartLayer(nLay),
73 fMinNPoints(0), fMinQ(0), fTrackToFollow(), fLayers(0), fSegmentation(0x0),
74 fCluLayer(0), fCluCoord(0)
4211bbc5 75{
76 //
77 // constructor
78 //
79 Init();
1d9af2d5 80
4211bbc5 81}
665c0bc7 82
1d9af2d5 83//________________________________________________________________________
556b741c 84AliITStrackerUpgrade::AliITStrackerUpgrade(const AliITStrackerUpgrade& tracker):
85 AliITStrackerMI(),
86 fNLayers(tracker.fNLayers), fPhiEstimate(tracker.fPhiEstimate),
87 fITSStandAlone(tracker.fITSStandAlone), fLambdac(tracker.fLambdac),
88 fPhic(tracker.fPhic), fCoef1(tracker.fCoef1), fCoef2(tracker.fCoef2),
89 fCoef3(tracker.fCoef3), fNloop(tracker.fNloop), fPhiWin(tracker.fPhiWin),
90 fLambdaWin(tracker.fLambdaWin), fVert(tracker.fVert), fVertexer(tracker.fVertexer),
91 fListOfTracks(tracker.fListOfTracks), fListOfUTracks(tracker.fListOfUTracks),
92 fITSclusters(tracker.fITSclusters), fInwardFlag(tracker.fInwardFlag),
93 fOuterStartLayer(tracker.fOuterStartLayer), fInnerStartLayer(tracker.fInnerStartLayer),
94 fMinNPoints(tracker.fMinNPoints), fMinQ(tracker.fMinQ), fTrackToFollow(tracker.fTrackToFollow), fLayers(tracker.fLayers),
95 fSegmentation(tracker.fSegmentation), fCluLayer(tracker.fCluLayer), fCluCoord(tracker.fCluCoord)
4211bbc5 96{
97 //
98 // Copy constructor
99 for(Int_t i=0;i<2;i++){
100 fPoint1[i]=tracker.fPoint1[i];
101 fPoint2[i]=tracker.fPoint2[i];
102 fPoint3[i]=tracker.fPoint3[i];
103 fPointc[i]=tracker.fPointc[i];
104 }
105 if(tracker.fVertexer && tracker.fVert){
106 fVert = new AliESDVertex(*tracker.fVert);
107 }
108 else {
109 fVert = tracker.fVert;
110 }
111 for(Int_t i=0;i<fNLayers;i++){
112 fCluLayer[i] = tracker.fCluLayer[i];
113 fCluCoord[i] = tracker.fCluCoord[i];
114 }
1d9af2d5 115}
116//______________________________________________________________________
117AliITStrackerUpgrade& AliITStrackerUpgrade::operator=(const AliITStrackerUpgrade& source){
118 // Assignment operator.
119 this->~AliITStrackerUpgrade();
120 new(this) AliITStrackerUpgrade(source);
121 return *this;
122
123}
124
125//____________________________________________________________________________
126AliITStrackerUpgrade::~AliITStrackerUpgrade(){
127 // destructor
128 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
129 // and is deleted here
130 if(fVertexer){
131 if(fVert)delete fVert;
132 }
133 fVert = 0;
134 fVertexer = 0;
135
136 if(fPhiWin)delete []fPhiWin;
137 if(fLambdaWin)delete []fLambdaWin;
138 fListOfTracks->Delete();
139 delete fListOfTracks;
0b255a22 140 fListOfUTracks->Delete();
141 delete fListOfUTracks;
1d9af2d5 142 if(fCluLayer){
665c0bc7 143 for(Int_t i=0;i<fNLayers;i++){
1d9af2d5 144 if(fCluLayer[i]){
145 fCluLayer[i]->Delete();
146 delete fCluLayer[i];
147 }
148 }
149 delete [] fCluLayer;
150 }
151 if(fCluCoord){
665c0bc7 152 for(Int_t i=0;i<fNLayers;i++){
1d9af2d5 153 if(fCluCoord[i]){
154 fCluCoord[i]->Delete();
155 delete fCluCoord[i];
156 }
157 }
158 delete [] fCluCoord;
159 }
160
f059e2be 161 if(fSegmentation) delete fSegmentation;
1d9af2d5 162}
163
164//____________________________________________________________________________
165Int_t AliITStrackerUpgrade::Clusters2Tracks(AliESDEvent *event){
166 // This method is used to find and fit the tracks. By default the corresponding
167 // method in the parent class is invoked. In this way a combined tracking
168 // TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
169 // is done in the ITS only. In the standard reconstruction chain this option
170 // can be set via AliReconstruction::SetOption("ITS","onlyITS")
171 Int_t rc=0;
172 if(!fITSStandAlone){
173 rc=AliITStrackerMI::Clusters2Tracks(event);
174 }
175 else {
176 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
177 }
178 if(!rc){
179 rc=FindTracks(event,kFALSE);
180 if(AliITSReconstructor::GetRecoParam()->GetSAUseAllClusters()==kTRUE) {
181 rc=FindTracks(event,kTRUE);
182 }
183 }
184 return rc;
185}
186//_________________________________________________-
187void AliITStrackerUpgrade::Init(){
188 // Reset all data members
665c0bc7 189 const Int_t nL = fNLayers;
1d9af2d5 190 fPhiEstimate=0;
3e1215c5 191 for(Int_t i=0;i<2;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
1d9af2d5 192 fLambdac=0;
193 fPhic=0;
194 fCoef1=0;
195 fCoef2=0;
196 fCoef3=0;
197 fPointc[0]=0;
198 fPointc[1]=0;
199 fVert = 0;
200 fVertexer = 0;
201 Int_t nLoops=AliITSReconstructor::GetRecoParam()->GetNLoopsSA();
202 if(nLoops==33){
203 SetFixedWindowSizes();
204 }else{
205 Double_t phimin=AliITSReconstructor::GetRecoParam()->GetMinPhiSA();
206 Double_t phimax=AliITSReconstructor::GetRecoParam()->GetMaxPhiSA();
207 Double_t lambmin=AliITSReconstructor::GetRecoParam()->GetMinLambdaSA();
208 Double_t lambmax=AliITSReconstructor::GetRecoParam()->GetMaxLambdaSA();
209 SetCalculatedWindowSizes(nLoops,phimin,phimax,lambmin,lambmax);
210 }
211 fMinQ=AliITSReconstructor::GetRecoParam()->GetSAMinClusterCharge();
212 fITSclusters = 0;
213 SetOuterStartLayer(1);
214 SetSAFlag(kFALSE);
4211bbc5 215 fListOfTracks=new TClonesArray("AliITStrackU",100);
0b255a22 216 fListOfUTracks=new TClonesArray("AliITStrackU",100);
665c0bc7 217 fLayers=new AliITSlayerUpgrade*[nL];//to be fixed
1d9af2d5 218 fCluLayer = 0;
219 fCluCoord = 0;
220 fMinNPoints = 3;
665c0bc7 221 for(Int_t layer=0; layer<fNLayers; layer++){
1d9af2d5 222 Double_t p=0.;
223 Double_t zC= 0.;
224 fLayers[layer] = new AliITSlayerUpgrade(p,zC);
225 }
226
db688ae2 227 fSegmentation = new AliITSsegmentationUpgrade();
1d9af2d5 228
229}
230//_______________________________________________________________________
231Int_t AliITStrackerUpgrade::LoadClusters(TTree *clusTree){
f059e2be 232 //
233 // Load clusters for tracking
234 //
8d499867 235
0ac80088 236 TClonesArray statITSCluster("AliITSRecPointU");
8d499867 237 TClonesArray *ITSCluster = &statITSCluster;
238
f059e2be 239 TBranch* itsClusterBranch=clusTree->GetBranch("ITSRecPoints");
240 if (!itsClusterBranch){
241 AliError("can't get the branch with the ITS clusters ! \n");
242 return 1;
243 }
244 itsClusterBranch->SetAddress(&ITSCluster);
245 clusTree->GetEvent(0);
246 Int_t nCluster = ITSCluster->GetEntriesFast();
247 for(Int_t i=0; i<nCluster; i++){
0ac80088 248 AliITSRecPointU *recp = (AliITSRecPointU*)ITSCluster->UncheckedAt(i);
249 fLayers[recp->GetLayer()]->InsertCluster(new AliITSRecPointU(*recp));
f059e2be 250 }//loop clusters
8d499867 251
1d9af2d5 252 SetClusterTree(clusTree);
253 return 0;
254}
255
256//_______________________________________________________
257void AliITStrackerUpgrade::ResetForFinding(){
258 // Reset data members used in all loops during track finding
259 fPhiEstimate=0;
3e1215c5 260 for(Int_t i=0;i<2;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
1d9af2d5 261 fLambdac=0;
262 fPhic=0;
263 fCoef1=0;
264 fCoef2=0;
265 fCoef3=0;
266 fPointc[0]=0;
267 fPointc[1]=0;
268 fListOfTracks->Clear();
0b255a22 269 fListOfUTracks->Clear();
1d9af2d5 270}
271
1d9af2d5 272//______________________________________________________________________
273Int_t AliITStrackerUpgrade::FindTracks(AliESDEvent* event,Bool_t useAllClusters){
274
275 // Track finder using the ESD object
276 AliDebug(2,Form(" field is %f",event->GetMagneticField()));
1d9af2d5 277 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
278 if(!fITSclusters){
279 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
280 return -1;
281 }
282
283 //Reads event and mark clusters of traks already found, with flag kITSin
284 Int_t nentr=event->GetNumberOfTracks();
285 if(!useAllClusters) {
286 while (nentr--) {
287 AliESDtrack *track=event->GetTrack(nentr);
288 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
289 Int_t idx[12];
290 Int_t ncl = track->GetITSclusters(idx);
291 for(Int_t k=0;k<ncl;k++){
0ac80088 292 AliITSRecPointU* cll = (AliITSRecPointU*)GetCluster(idx[k]);
1d9af2d5 293 cll->SetBit(kSAflag);
294 }
295 }
296 }
297 }else{
298 while (nentr--) {
299 AliESDtrack *track=event->GetTrack(nentr);
300 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
301 Int_t idx[12];
302 Int_t ncl = track->GetITSclusters(idx);
303 for(Int_t k=0;k<ncl;k++){
0ac80088 304 AliITSRecPointU* cll = (AliITSRecPointU*)GetCluster(idx[k]);
1d9af2d5 305 cll->ResetBit(kSAflag);
306 }
307 }
308 }
309 }
310 //Get primary vertex
311 Double_t primaryVertex[3];
312 event->GetVertex()->GetXYZ(primaryVertex);
4211bbc5 313 Int_t nclusters[fNLayers];
665c0bc7 314 for(Int_t i=0; i<fNLayers; i++){
0b255a22 315 nclusters[i]=0;
316 }
317
4211bbc5 318 Int_t dmar[fNLayers];
665c0bc7 319 for(Int_t i=0; i<fNLayers; i++){
0b255a22 320 dmar[i]=0;
321 }
322
1d9af2d5 323 if (fCluLayer == 0) {
665c0bc7 324 fCluLayer = new TClonesArray*[fNLayers];
325 fCluCoord = new TClonesArray*[fNLayers];
326 for(Int_t i=0;i<fNLayers;i++) {
1d9af2d5 327 fCluLayer[i]=0;
328 fCluCoord[i]=0;
329 }
330 }
665c0bc7 331 for(Int_t i=0;i<fNLayers;i++){
1d9af2d5 332 if (!ForceSkippingOfLayer(i)) {
333 for(Int_t cli=0;cli<fLayers[i]->GetNumberOfClusters();cli++){
0ac80088 334 AliITSRecPointU* cls = (AliITSRecPointU*)fLayers[i]->GetCluster(cli);
1d9af2d5 335 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
336 if(cls->GetQ()==0) continue; //fake clusters dead zones
337 if(i>1 && cls->GetQ()<=fMinQ) continue; // cut on SDD and SSD cluster charge
338 nclusters[i]++;
339 }
340 }
341 dmar[i]=0;
342 if(!fCluLayer[i]){
0ac80088 343 fCluLayer[i] = new TClonesArray("AliITSRecPointU",nclusters[i]);
1d9af2d5 344 }else{
345 fCluLayer[i]->Delete();
346 fCluLayer[i]->Expand(nclusters[i]);
347 }
348 if(!fCluCoord[i]){
349 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
350 }else{
351 fCluCoord[i]->Delete();
352 fCluCoord[i]->Expand(nclusters[i]);
353 }
354 }
665c0bc7 355 for(Int_t ilay=0;ilay<fNLayers;ilay++){
1d9af2d5 356 TClonesArray &clulay = *fCluLayer[ilay];
357 TClonesArray &clucoo = *fCluCoord[ilay];
358 if (!ForceSkippingOfLayer(ilay)){
f059e2be 359 AliDebug(2,Form("number of clusters in layer %i : %i",ilay,fLayers[ilay]->GetNumberOfClusters()));
1d9af2d5 360 for(Int_t cli=0;cli<fLayers[ilay]->GetNumberOfClusters();cli++){
0ac80088 361 AliITSRecPointU* cls = (AliITSRecPointU*)fLayers[ilay]->GetCluster(cli);
1d9af2d5 362 if(cls->TestBit(kSAflag)==kTRUE) continue;
363 if(cls->GetQ()==0) continue;
364 Double_t phi=0;Double_t lambda=0;
365 Double_t x=0;Double_t y=0;Double_t z=0;
366 Float_t sx=0;Float_t sy=0;Float_t sz=0;
367 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
368 GetCoorErrors(cls,sx,sy,sz);
369 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
370 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
371 dmar[ilay]++;
372 }
db688ae2 373 } else AliDebug(2,Form("Force skipping layer %i",ilay));
1d9af2d5 374 }
375
376
377 // track counter
378 Int_t ntrack=0;
379
4211bbc5 380 static Int_t nClusLay[fgMaxNLayer];//counter for clusters on each layer
1d9af2d5 381 Int_t startLayForSeed=0;
382 Int_t lastLayForSeed=fOuterStartLayer;
383 Int_t nSeedSteps=lastLayForSeed-startLayForSeed;
384 Int_t seedStep=1;
385 if(fInwardFlag){
665c0bc7 386 startLayForSeed=fNLayers-1;
1d9af2d5 387 lastLayForSeed=fInnerStartLayer;
388 nSeedSteps=startLayForSeed-lastLayForSeed;
389 seedStep=-1;
390 }
391 // loop on minimum number of points
665c0bc7 392 for(Int_t iMinNPoints=fNLayers; iMinNPoints>=fMinNPoints; iMinNPoints--) {
1d9af2d5 393 // loop on starting layer for track finding
394 for(Int_t iSeedLay=0; iSeedLay<=nSeedSteps; iSeedLay++) {
395 Int_t theLay=startLayForSeed+iSeedLay*seedStep;
396 if(ForceSkippingOfLayer(theLay)) continue;
397 Int_t minNPoints=iMinNPoints-theLay;
665c0bc7 398 if(fInwardFlag) minNPoints=iMinNPoints-(fNLayers-1-theLay);
399 for(Int_t i=theLay+1;i<fNLayers;i++)
1d9af2d5 400 if(ForceSkippingOfLayer(i))
401 minNPoints--;
402 if(minNPoints<fMinNPoints) continue;
403
404 // loop on phi and lambda window size
405 for(Int_t nloop=0;nloop<fNloop;nloop++){
eaaed734 406 Int_t nclTheLay=fCluLayer[theLay]->GetEntriesFast();
1d9af2d5 407 while(nclTheLay--){
408 ResetForFinding();
409 Bool_t useRP=SetFirstPoint(theLay,nclTheLay,primaryVertex);
410 if(!useRP) continue;
665c0bc7 411 AliITStrackU trs(fNLayers);
1d9af2d5 412
413 Int_t pflag=0;
414 Int_t kk;
665c0bc7 415 for(kk=0;kk<fNLayers;kk++) nClusLay[kk] = 0;
1d9af2d5 416 kk=0;
417 nClusLay[kk] = SearchClusters(theLay,fPhiWin[nloop],fLambdaWin[nloop],
418 &trs,primaryVertex[2],pflag);
419 Int_t nextLay=theLay+seedStep;
dd290e92 420 if(nextLay<0){
421 AliWarning("Negative layer id. Please check!");
422 continue;
423 }
1d9af2d5 424 Bool_t goon=kTRUE;
425 while(goon){
426
427 kk++;
428 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
429 &trs,primaryVertex[2],pflag);
430 if(nClusLay[kk]!=0){
431
432 pflag=1;
433 if(kk==1) {
434 fPoint3[0]=fPointc[0];
435 fPoint3[1]=fPointc[1];
436 } else {
437 UpdatePoints();
438 }
439 }
440 nextLay+=seedStep;
665c0bc7 441 if(nextLay<0 || nextLay==fNLayers) goon=kFALSE;
1d9af2d5 442 }
443
444
445 Int_t layOK=0;
446 if(!fInwardFlag){
665c0bc7 447 for(Int_t nnp=0;nnp<fNLayers-theLay;nnp++){
1d9af2d5 448 if(nClusLay[nnp]!=0) layOK+=1;
449 }
450 }else{
451 for(Int_t nnp=theLay; nnp>=0; nnp--){
452 if(nClusLay[nnp]!=0) layOK+=1;
453 }
454 }
455 if(layOK>=minNPoints){
456 AliDebug(2,Form("---NPOINTS: %d; MAP: %d %d %d %d %d %d\n",layOK,nClusLay[0],nClusLay[1],nClusLay[2],nClusLay[3],nClusLay[4],nClusLay[5]));
457 AliITStrackV2* tr2 = 0;
458 Bool_t onePoint = kFALSE;
4211bbc5 459 tr2 = FitTrack(&trs,primaryVertex,onePoint);
460 if(!tr2){
461 continue;
462 }
463 AliDebug(2,Form("---NPOINTS fit: %d\n",tr2->GetNumberOfClusters()));
1d9af2d5 464
4211bbc5 465 StoreTrack(tr2,event,useAllClusters);
466 ntrack++;
467
468 }
1d9af2d5 469
470 }//end loop on clusters of theLay
471 } //end loop on window sizes
472 } //end loop on theLay
473 }//end loop on min points
474 if(!useAllClusters) AliInfo(Form("Number of found tracks: %d",event->GetNumberOfTracks()));
475
476 ResetForFinding();
477 return 0;
478
479}
480
481//________________________________________________________________________
482
0b255a22 483AliITStrackV2* AliITStrackerUpgrade::FitTrack(AliITStrackU* tr,Double_t *primaryVertex,Bool_t onePoint) {
1d9af2d5 484
0b255a22 485 const Int_t kMaxClu=AliITStrackU::kMaxNumberOfClusters;
1d9af2d5 486
487
4211bbc5 488 static Int_t clind[fgMaxNLayer][kMaxClu];
489 static Int_t clmark[fgMaxNLayer][kMaxClu];
490 static Int_t end[fgMaxNLayer];
0ac80088 491 static AliITSRecPointU *listlayer[fgMaxNLayer][kMaxClu];
556b741c 492 static Int_t indices[fgMaxNLayer];
493
4211bbc5 494 for(Int_t k=0;k<fgMaxNLayer; k++)end[k]=0;
1d9af2d5 495
665c0bc7 496 for(Int_t i=0;i<fNLayers;i++) {
1d9af2d5 497 for(Int_t j=0;j<kMaxClu; j++){
498 clind[i][j]=0;
499 clmark[i][j]=0;
500 listlayer[i][j]=0;
501 }
502 }
665c0bc7 503 Int_t inx[fNLayers];
504 for (Int_t k=0; k<fNLayers; k++) inx[k]=-1;
0b255a22 505 Int_t nclusters = tr->GetNumberOfClustersU();
1d9af2d5 506 for(Int_t ncl=0;ncl<nclusters;ncl++){
0b255a22 507 Int_t index = tr->GetClusterIndexU(ncl);
1d9af2d5 508 Int_t lay = (index & 0xf0000000) >> 28;
7dc6449a 509 //Int_t cli = index&0x0fffffff;
9e396337 510 //AliITSRecPoint* cl = (AliITSRecPoint*)fLayers[lay]->GetCluster(cli);
0ac80088 511 AliITSRecPointU* cl = (AliITSRecPointU*)GetCluster(index);
1d9af2d5 512 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
513 inx[lay]=index;
514
515 Int_t nInLay=end[lay];
516 listlayer[lay][nInLay]=cl;
517 clind[lay][nInLay]=index;
518 end[lay]++;
519 }
520
665c0bc7 521 for(Int_t nlay=0;nlay<fNLayers;nlay++){
1d9af2d5 522 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
523 Int_t mark = tr->GetClusterMark(nlay,ncl);
524 clmark[nlay][ncl]=mark;
525 }
526 }
527
528
529 Int_t firstLay=-1,secondLay=-1;
665c0bc7 530 for(Int_t i=0;i<fNLayers;i++) {
1d9af2d5 531 if(end[i]==0) {
532 end[i]=1;
533 }else{
534 if(firstLay==-1) {
535 firstLay=i;
536 } else if(secondLay==-1) {
537 secondLay=i;
538 }
539 }
540 }
541
4211bbc5 542 //---adding initialization for non existent layers
543 for(Int_t i=fNLayers;i<fgMaxNLayer;i++) {
544 if(end[i]==0) {
545 end[i]=1;
546 }
547 }
548
549
550
1d9af2d5 551 if(firstLay==-1 || (secondLay==-1 && !onePoint)) return 0;
4211bbc5 552
0b255a22 553 TClonesArray &arrSA= *fListOfUTracks;
1d9af2d5 554 Int_t nFoundTracks=0;
555
4211bbc5 556
1d9af2d5 557 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
556b741c 558 indices[0]=l0;
1d9af2d5 559 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
556b741c 560 indices[1]=l1;
1d9af2d5 561 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
556b741c 562 indices[2]=l2;
1d9af2d5 563 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
556b741c 564 indices[3]=l3;
1d9af2d5 565 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
556b741c 566 indices[4]=l4;
1d9af2d5 567 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
556b741c 568 indices[5]=l5;
4211bbc5 569 for(Int_t l6=0;l6<end[6];l6++){//loop on layer 7
556b741c 570 indices[6]=l6;
4211bbc5 571 for(Int_t l7=0;l7<end[7];l7++){ //loop on layer 8
556b741c 572 indices[7]=l7;
573
574 Int_t iFirstLay=indices[firstLay];
575 Int_t mrk1=clmark[firstLay][iFirstLay];
576
4211bbc5 577 Double_t x1,y1,z1,sx1,sy1,sz1;
578 Double_t x2,y2,z2,sx2,sy2,sz2;
556b741c 579 AliITSRecPointU* p1=(AliITSRecPointU*)listlayer[firstLay][iFirstLay];
4211bbc5 580 Int_t layer = 0;
581 Double_t radius = 0.;
582 Double_t yclu1 = p1->GetY();
583 Double_t zclu1 = p1->GetZ();
584 layer=p1->GetLayer();
585 radius = fSegmentation->GetRadius(layer);
586 Double_t cv=0.,tgl2=0.,phi2=0.;
556b741c 587 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,mrk1);
4211bbc5 588 x1 = arr1->GetX();
589 y1 = arr1->GetY();
590 z1 = arr1->GetZ();
591 sx1 = arr1->GetSx();
592 sy1 = arr1->GetSy();
593 sz1 = arr1->GetSz();
594
595 if(secondLay>0) {
556b741c 596 Int_t iSecondLay=indices[secondLay];
597 Int_t mrk2=clmark[secondLay][iSecondLay];
598 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,mrk2);
4211bbc5 599 x2 = arr2->GetX();
600 y2 = arr2->GetY();
601 z2 = arr2->GetZ();
602 sx2 = arr2->GetSx();
603 sy2 = arr2->GetSy();
604 sz2 = arr2->GetSz();
605 cv = Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
606 tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
607 phi2 = TMath::ATan2((y2-y1),(x2-x1));
608 }
556b741c 609
4211bbc5 610 Double_t x,y,z = 0.;
611 Double_t xz[2];
556b741c 612 xz[0]= p1->GetDetLocalX();
613 xz[1]= p1->GetDetLocalZ();
614 fSegmentation->DetToGlobal(layer,p1->GetModule(),xz[0], xz[1],x,y,z);
4211bbc5 615
616
0ac80088 617 Double_t phiclrad;
4211bbc5 618 phiclrad=TMath::ATan2(y,x);
619 if (phiclrad<0) phiclrad+=TMath::TwoPi();
620 else if (phiclrad>=TMath::TwoPi()) phiclrad-=TMath::TwoPi();
621
556b741c 622 Double_t alpha = fSegmentation->GetAlpha(fSegmentation->GetModule(phiclrad));
623
0ac80088 624
4211bbc5 625 AliITStrackU trac(alpha,radius,yclu1,zclu1,phi2,tgl2,cv,1,fNLayers);
556b741c 626
627 for(Int_t iLay=fgMaxNLayer-1; iLay>=0; iLay--){
628 Int_t iInLay=indices[iLay];
629 AliITSRecPointU* cl=(AliITSRecPointU*)listlayer[iLay][iInLay];
630 if(cl!=0){
631 trac.AddClusterV2(iLay,(clind[iLay][iInLay] & 0x0fffffff)>>0);
632 trac.AddClusterMark(iLay,clmark[iLay][iInLay]);
633 }
4211bbc5 634 }
556b741c 635
4211bbc5 636 //fit with Kalman filter using RefitAtBase()
637 AliITStrackU ot(trac, kFALSE);
638 ot.ResetCovariance(10.);
639 ot.ResetClusters();
1d9af2d5 640
4211bbc5 641 // Propagate inside the innermost layer with a cluster
642 if(ot.Propagate(ot.GetX()-0.1*ot.GetX())) {
643 if(RefitAtBase(AliITSRecoParam::GetrInsideITSscreen(),&ot,inx)){ //fit from layer 1 to layer 6
644 AliITStrackU otrack2(ot,kFALSE);
645 otrack2.ResetCovariance(10.);
646 otrack2.ResetClusters();
1d9af2d5 647
4211bbc5 648 //fit from last layer to layer 1
649 if(RefitAtBase(/*AliITSRecoParam::GetrInsideSPD1()*/fSegmentation->GetRadius(0)-0.3,&otrack2,inx)) {//check clind
650 new(arrSA[nFoundTracks]) AliITStrackU(otrack2);
651 ++nFoundTracks;
652 }
1d9af2d5 653
4211bbc5 654 }
655 }
656
4211bbc5 657 }//end loop layer 8
658 }//end loop layer 7
1d9af2d5 659 }//end loop layer 6
660 }//end loop layer 5
661 }//end loop layer 4
662 }//end loop layer 3
663 }//end loop layer 2
664 }//end loop layer 1
665
666
667
668
4211bbc5 669 if(fListOfUTracks->GetEntries()==0) return 0;
1d9af2d5 670
671 Int_t lowchi2 = FindTrackLowChiSquare();
4211bbc5 672 AliITStrackU* otrack = (AliITStrackU*)fListOfUTracks->At(lowchi2);
673
1d9af2d5 674 if(otrack==0) {
675 return 0;
676 }
0a64515a 677
678 CookLabel(otrack,0.); //MI change - to see fake ratio
679 Int_t label=FindLabel(otrack);
680 otrack->SetLabel(label);
681
665c0bc7 682 Int_t indexc[fNLayers];
683 for(Int_t i=0;i<fNLayers;i++) indexc[i]=0;
1d9af2d5 684 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
685 indexc[nind] = otrack->GetClusterIndex(nind);
686 }
1d9af2d5 687 //remove clusters of found track
665c0bc7 688 for(Int_t nlay=0;nlay<fNLayers;nlay++){
4211bbc5 689 for(Int_t cln=0;cln<otrack->GetNumberOfMarked(nlay);cln++){
690 Int_t index = otrack->GetClusterMark(nlay,cln);
1d9af2d5 691 fCluLayer[nlay]->RemoveAt(index);
692 RemoveClusterCoord(nlay,index);
693 fCluLayer[nlay]->Compress();
694 }
695 }
696 return otrack;
697
698}
699
700//_______________________________________________________
701void AliITStrackerUpgrade::StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) /*const*/
702{
703 //
704 // Add new track to the ESD
705 //
706 AliESDtrack outtrack;
707 outtrack.UpdateTrackParams(t,AliESDtrack::kITSin);
708 if(pureSA) outtrack.SetStatus(AliESDtrack::kITSpureSA);
709 outtrack.SetStatus(AliESDtrack::kITSout);
710 outtrack.SetStatus(AliESDtrack::kITSrefit);
711 Double_t sdedx[4]={0.,0.,0.,0.};
712 for(Int_t i=0; i<4; i++) sdedx[i]=t->GetSampledEdx(i);
713 outtrack.SetITSdEdxSamples(sdedx);
714 event->AddTrack(&outtrack);
715 return;
716}
717
718
719//_______________________________________________________
0b255a22 720Int_t AliITStrackerUpgrade::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackU* trs,Double_t /*zvertex*/,Int_t pflag){
1d9af2d5 721 //function used to to find the clusters associated to the track
722
8d499867 723 AliDebug(2,"Starting...");
724 if(ForceSkippingOfLayer(layer)) {
f059e2be 725 AliDebug(2,Form("Forcing skipping of layer %i. Exiting",layer));
726 return 0;
8d499867 727 }
1d9af2d5 728
729 Int_t nc=0;
db688ae2 730 Double_t r=fSegmentation->GetRadius(layer);
1d9af2d5 731 if(pflag==1){
732 Float_t cx1,cx2,cy1,cy2;
733 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
734 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
735 return 0;
736 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
737 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
738 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
739 }
740
eaaed734 741
742 Double_t phiExpect=fPhiEstimate;
743 Double_t lamExpect=fLambdac;
744
745 Int_t ncl = fCluLayer[layer]->GetEntriesFast();
1d9af2d5 746 for (Int_t index=0; index<ncl; index++) {
eaaed734 747
1d9af2d5 748 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
1d9af2d5 749
750 Double_t lambda = arr->GetLambda();
eaaed734 751 if (TMath::Abs(lambda-lamExpect)>lambdawindow) continue;
752
753 Double_t phi = arr->GetPhi();
754 Double_t deltaPhi = phi-phiExpect;
755 if(deltaPhi>TMath::Pi()) deltaPhi-=2*TMath::Pi();
756 else if(deltaPhi<-TMath::Pi()) deltaPhi+=2*TMath::Pi();
757 if (TMath::Abs(deltaPhi)>phiwindow) continue;
1d9af2d5 758
0b255a22 759 if(trs->GetNumberOfClustersU()==trs->GetMaxNumberOfClusters()) return 0;
1d9af2d5 760 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
761 Int_t orind = arr->GetOrInd();
0b255a22 762 trs->AddClusterU(layer,orind);
1d9af2d5 763 trs->AddClusterMark(layer,index);
1d9af2d5 764 nc++;
765 fLambdac=lambda;
766 fPhiEstimate=phi;
767
768 fPointc[0]=arr->GetX();
769 fPointc[1]=arr->GetY();
eaaed734 770
1d9af2d5 771 }
772 return nc;
eaaed734 773
1d9af2d5 774}
775
776//________________________________________________________________
777Bool_t AliITStrackerUpgrade::SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex){
778 // Sets the first point (seed) for tracking
779
0ac80088 780 AliITSRecPointU* cl = (AliITSRecPointU*)fCluLayer[lay]->At(clu);
1d9af2d5 781 if(!cl) return kFALSE;
782 if (cl->GetQ()<=0) return kFALSE;
783 if(lay>1 && cl->GetQ()<=fMinQ) return kFALSE;
784 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(lay,clu);
785 fPhic = arr->GetPhi();
786 fLambdac = arr->GetLambda();
787 fPhiEstimate = fPhic;
788 fPoint1[0]=primaryVertex[0];
789 fPoint1[1]=primaryVertex[1];
790 fPoint2[0]=arr->GetX();
791 fPoint2[1]=arr->GetY();
792 return kTRUE;
793}
794
795//________________________________________________________________
796void AliITStrackerUpgrade::UpdatePoints(){
797 //update of points for the estimation of the curvature
798
799 fPoint2[0]=fPoint3[0];
800 fPoint2[1]=fPoint3[1];
801 fPoint3[0]=fPointc[0];
802 fPoint3[1]=fPointc[1];
1d9af2d5 803}
1d9af2d5 804//___________________________________________________________________
805Int_t AliITStrackerUpgrade::FindEquation(Float_t x1, Float_t y1, Float_t x2, Float_t y2, Float_t x3, Float_t y3,Float_t& a, Float_t& b, Float_t& c){
806
807 //given (x,y) of three recpoints (in global coordinates)
808 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
809
810 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
811 if(den==0) return 0;
812 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
813 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
814 c = -x1*x1-y1*y1-a*x1-b*y1;
815 return 1;
816}
817//__________________________________________________________________________
818Int_t AliITStrackerUpgrade::FindIntersection(Float_t a1, Float_t b1, Float_t c1, Float_t c2,Float_t& x1,Float_t& y1, Float_t& x2, Float_t& y2){
819
820 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
821 //c2 is -rlayer*rlayer
822
823 if(a1==0) return 0;
824 Double_t m = c2-c1;
825 Double_t aA = (b1*b1)/(a1*a1)+1;
826 Double_t bB = (-2*m*b1/(a1*a1));
827 Double_t cC = c2+(m*m)/(a1*a1);
828 Double_t dD = bB*bB-4*aA*cC;
829 if(dD<0) return 0;
830
831 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
832 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
833 x1 = (c2-c1-b1*y1)/a1;
834 x2 = (c2-c1-b1*y2)/a1;
835
836 return 1;
837}
838//____________________________________________________________________
839Double_t AliITStrackerUpgrade::Curvature(Double_t x1,Double_t y1,Double_t
840 x2,Double_t y2,Double_t x3,Double_t y3){
841
842 //calculates the curvature of track
843 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
844 if(den==0) return 0;
845 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
846 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
847 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
848 Double_t xc=-a/2.;
849
850 if((a*a+b*b-4*c)<0) return 0;
851 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
852 if(rad==0) return 0;
853
854 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
855 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
856 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
857 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
858
859 return 1/rad;
860
861}
1d9af2d5 862//____________________________________________________________________
863Double_t AliITStrackerUpgrade::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
864
865 //Returns the point closest to pp
866
867 Double_t diff1 = p1-pp;
868 Double_t diff2 = p2-pp;
869
870 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
871 else fPhiEstimate=p2;
872 return fPhiEstimate;
873
874}
1d9af2d5 875//_________________________________________________________________
876Int_t AliITStrackerUpgrade::FindTrackLowChiSquare() const {
877 // returns track with lowest chi square
4211bbc5 878 Int_t dim=fListOfUTracks->GetEntries();
1d9af2d5 879 if(dim<=1) return 0;
4211bbc5 880 AliITStrackV2* trk = (AliITStrackV2*)fListOfUTracks->At(0);
1d9af2d5 881 Double_t minChi2=trk->GetChi2();
882 Int_t index=0;
883 for(Int_t i=1;i<dim;i++){
4211bbc5 884 trk = (AliITStrackV2*)fListOfUTracks->At(i);
1d9af2d5 885 Double_t chi2=trk->GetChi2();
886 if(chi2<minChi2){
887 minChi2=chi2;
888 index=i;
889 }
890 }
891 return index;
892}
893
894//__________________________________________________________
0a64515a 895Int_t AliITStrackerUpgrade::FindLabel(AliITStrackV2* track) const {
896 //
1d9af2d5 897
665c0bc7 898 Int_t labl[fNLayers][3];
899 Int_t cnts[fNLayers][3];
900 for(Int_t j=0;j<fNLayers;j++){
0a64515a 901 for(Int_t k=0;k<3;k++){
902 labl[j][k]=-2;
903 cnts[j][k]=1;
904 }
905 }
906 Int_t iNotLabel=0;
907 for(Int_t i=0;i<track->GetNumberOfClusters(); i++) {
908 Int_t indexc = track->GetClusterIndex(i);
0ac80088 909 AliITSRecPointU* cl = (AliITSRecPointU*)GetCluster(indexc);
0a64515a 910 AliDebug(2,Form(" cluster index %i ",indexc));
911 Int_t iLayer=cl->GetLayer();
912 for(Int_t k=0;k<3;k++){
913 labl[iLayer][k]=cl->GetLabel(k);
914 if(labl[iLayer][k]<0) iNotLabel++;
915 }
916 }
917 if(iNotLabel==3*track->GetNumberOfClusters()) return -2;
918
665c0bc7 919 for(Int_t j1=0;j1<fNLayers; j1++) {
0a64515a 920 for(Int_t j2=0; j2<j1; j2++){
921 for(Int_t k1=0; k1<3; k1++){
922 for(Int_t k2=0; k2<3; k2++){
923 if(labl[j1][k1]>=0 && labl[j1][k1]==labl[j2][k2] && cnts[j2][k2]>0){
924 cnts[j2][k2]++;
925 cnts[j1][k1]=0;
926 }
927 }
928 }
929 }
930 }
1d9af2d5 931
0a64515a 932
933 Int_t cntMax=0;
934 Int_t label=-1;
665c0bc7 935 for(Int_t j=0;j<fNLayers;j++){
0a64515a 936 for(Int_t k=0;k<3;k++){
937 if(cnts[j][k]>cntMax && labl[j][k]>=0){
938 cntMax=cnts[j][k];
939 label=labl[j][k];
940 }
941 }
942 }
943
944 Int_t lflag=0;
665c0bc7 945 for(Int_t i=0;i<fNLayers;i++)
f059e2be 946 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
0a64515a 947 if(lflag<track->GetNumberOfClusters()) label = -label;
948 return label;
1d9af2d5 949}
1d9af2d5 950//_____________________________________________________________________________
1d9af2d5 951void AliITStrackerUpgrade::SetCalculatedWindowSizes(Int_t n, Float_t phimin, Float_t phimax, Float_t lambdamin, Float_t lambdamax){
952 // Set sizes of the phi and lambda windows used for track finding
953 fNloop = n;
954 if(fPhiWin) delete [] fPhiWin;
955 if(fLambdaWin) delete [] fLambdaWin;
956 fPhiWin = new Double_t[fNloop];
957 fLambdaWin = new Double_t[fNloop];
958 Float_t stepPhi=(phimax-phimin)/(Float_t)(fNloop-1);
959 Float_t stepLambda=(lambdamax-lambdamin)/(Float_t)(fNloop-1);
960 for(Int_t k=0;k<fNloop;k++){
961 Float_t phi=phimin+k*stepPhi;
962 Float_t lam=lambdamin+k*stepLambda;
963 fPhiWin[k]=phi;
964 fLambdaWin[k]=lam;
965 }
966}
967//_____________________________________________________________________________
968void AliITStrackerUpgrade::SetFixedWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
969 // Set sizes of the phi and lambda windows used for track finding
970 fNloop = n;
971 if(phi){ // user defined values
972 fPhiWin = new Double_t[fNloop];
973 fLambdaWin = new Double_t[fNloop];
974 for(Int_t k=0;k<fNloop;k++){
975 fPhiWin[k]=phi[k];
976 fLambdaWin[k]=lam[k];
977 }
978 }
979 else { // default values
980
981 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
982 0.005,0.0053,0.0055,
983 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
984 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
985 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
986 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
987 0.005,0.005,0.006,
988 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
989 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
990 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
991
992 if(fNloop!=33){
993 fNloop = 33;
994 }
995
996
997 fPhiWin = new Double_t[fNloop];
998 fLambdaWin = new Double_t[fNloop];
999
1000 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes();
1001
1002 for(Int_t k=0;k<fNloop;k++){
1003 fPhiWin[k]=phid[k]*factor;
1004 fLambdaWin[k]=lambdad[k]*factor;
1005 }
1006
1007 }
1008
1009}
1010//_______________________________________________________________________
0ac80088 1011void AliITStrackerUpgrade::GetCoorAngles(AliITSRecPointU* cl,Double_t &phi,Double_t &lambda, Double_t &x, Double_t &y,Double_t &z,Double_t* vertex){
1d9af2d5 1012 //Returns values of phi (azimuthal) and lambda angles for a given cluster
1d9af2d5 1013
1014 Double_t xz[2];
1015 xz[0]= cl->GetDetLocalX();
1016 xz[1]= cl->GetDetLocalZ() ;
1d9af2d5 1017 Int_t ilayer;
1018 ilayer = cl->GetLayer();
556b741c 1019 fSegmentation->DetToGlobal(ilayer,cl->GetModule(),xz[0], xz[1],x,y,z);
1d9af2d5 1020
1021 if(x!=0 && y!=0)
1022 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
1023 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1024}
1025
1026//________________________________________________________________________
0ac80088 1027void AliITStrackerUpgrade::GetCoorErrors(AliITSRecPointU* cl,Float_t &sx,Float_t &sy, Float_t &sz){
1d9af2d5 1028
1029 //returns sigmax, y, z of cluster in global coordinates
1030 /*
1031 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1032 Int_t lay,lad,det;
1033 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
1034
1035 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1036 Double_t phi=TMath::Pi()/2+alpha;
1037 if (lay==1) phi+=TMath::Pi();
1038
1039 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
1040 */
1041 Float_t covm[6];
1042 cl->GetGlobalCov(covm);
1043 sx=TMath::Sqrt(covm[0]);
1044 sy=TMath::Sqrt(covm[3]);
1045 sz=TMath::Sqrt(covm[5]);
1046
1047
1048
1049 // Float_t covm[6];
1050 // cl->GetGlobalCov(covm);
1051 // sx=12*1e-04;//TMath::Sqrt(covm[0]);
1052 // sy=12*1e-04;//TMath::Sqrt(covm[3]);
1053 // sz=40*1e-04;//TMath::Sqrt(covm[5]);
1054 /*
1055 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1056 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1057 sz = TMath::Sqrt(cl->GetSigmaZ2());
1058 */
1059}
1060//_____________________________________________________________
1061void AliITStrackerUpgrade::UnloadClusters() {
1062 //--------------------------------------------------------------------
1063 //This function unloads ITS clusters
1064 //--------------------------------------------------------------------
665c0bc7 1065 for (Int_t i=0; i<fNLayers; i++) fLayers[i]->ResetClusters();
1d9af2d5 1066}
1067//______________________________________________________________________
4211bbc5 1068Bool_t AliITStrackerUpgrade::RefitAtBase(Double_t xx,AliITStrackU *track,
1d9af2d5 1069 const Int_t *clusters)
1070{
1071 //--------------------------------------------------------------------
1072 // Simplified version for ITS upgrade studies -- does not use module info
1073 //--------------------------------------------------------------------
665c0bc7 1074 Int_t index[fNLayers];
1d9af2d5 1075 Int_t k;
665c0bc7 1076 for (k=0; k<fNLayers; k++) index[k]=-1;
1d9af2d5 1077 //
665c0bc7 1078 for (k=0; k<fNLayers; k++) {
1d9af2d5 1079 index[k]=clusters[k];
1080 }
1d9af2d5 1081
1082 ULong_t trStatus=0;
1083 if(track->GetESDtrack()) trStatus=track->GetStatus();
1084 Int_t innermostlayer=0;
1085 if(trStatus&AliESDtrack::kTPCin) {
665c0bc7 1086 innermostlayer=fNLayers-1;
1d9af2d5 1087 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
665c0bc7 1088 for(innermostlayer=0; innermostlayer<fNLayers; innermostlayer++) {
db688ae2 1089 if( (drphi < (fSegmentation->GetRadius(innermostlayer)+1.)) ||
1d9af2d5 1090 index[innermostlayer] >= 0 ) break;
1091 }
1092 AliDebug(2,Form(" drphi %f innermost %d",drphi,innermostlayer));
1093 }
1094
1095 Int_t from, to, step;
1096 if (xx > track->GetX()) {
665c0bc7 1097 from=innermostlayer; to=fNLayers;
1d9af2d5 1098 step=+1;
1099 } else {
665c0bc7 1100 from=fNLayers-1; to=innermostlayer-1;
1d9af2d5 1101 step=-1;
1102 }
1103 TString dir = (step>0 ? "outward" : "inward");
1104
1105 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
1106 Double_t r=0.;
db688ae2 1107 r=fSegmentation->GetRadius(ilayer);
1d9af2d5 1108
1109 if (step<0 && xx>r){
1110 break;
1111 }
1112
1d9af2d5 1113
1114 Double_t oldGlobXYZ[3];
1115
1116 if (!track->GetXYZ(oldGlobXYZ)) {
1117 return kFALSE;
1118 }
1119 // continue if we are already beyond this layer
1120 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1121 if(step>0 && oldGlobR > r){
1122 continue; // going outward
1123 }
1124 if(step<0 && oldGlobR < r) {
1125 continue; // going inward
1126 }
1127 Double_t phi,z;
1128 if (!track->GetPhiZat(r,phi,z)){
1129 return kFALSE;
556b741c 1130 } // only for ITS-SA tracks refit
1d9af2d5 1131 track->SetCheckInvariant(kFALSE);
1132
1133 if (phi<0) phi+=TMath::TwoPi();//from 0 to 360 (rad)
1134 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();//
0ac80088 1135
1136 Double_t alpha = fSegmentation->GetAlpha(fSegmentation->GetModule(phi));
1d9af2d5 1137 if (!track->Propagate(alpha,r)) {
1d9af2d5 1138 return kFALSE;
1139 }
1140
0ac80088 1141 const AliITSRecPointU *clAcc=0;
1d9af2d5 1142 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
1143
1144 Int_t idx=index[ilayer];
1145 if (idx>=0) { // cluster in this layer
1146 Int_t cli = idx&0x0fffffff;
0ac80088 1147 const AliITSRecPointU *cl=(AliITSRecPointU *)fLayers[ilayer]->GetCluster(cli);
1d9af2d5 1148
1149 if (cl) {
1150 Int_t cllayer = (idx & 0xf0000000) >> 28;;
1151 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
1152 if (chi2<maxchi2) {
1153 clAcc=cl;
1154 maxchi2=chi2;
1155 } else {
f059e2be 1156 return kFALSE;
1d9af2d5 1157 }
1158 }
1159 }
1160
1161 if (clAcc) {
1162 if (!UpdateMI(track,clAcc,maxchi2,idx)){
1163 return kFALSE;
1164 }
1165 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
1166 }
1167
1168
1169 // Correct for material of the current layer
1170 // cross material
1171 // add time if going outward
1172 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)){
1173 return kFALSE;
1174 }
1175 track->SetCheckInvariant(kFALSE);
1176 } // end loop on layers
1177
1178 if (!track->PropagateTo(xx,0.,0.)){
1179 return kFALSE;
8d499867 1180 }
556b741c 1181
1d9af2d5 1182 return kTRUE;
1183}
1184
1185//_____________________________________________________________________
0ac80088 1186Int_t AliITStrackerUpgrade::UpdateMI(AliITStrackU* track, const AliITSRecPointU* cl,Double_t chi2,Int_t index) const
1d9af2d5 1187{
1188 //
1189 // Update ITS track
1190 //
1191 Int_t layer = (index & 0xf0000000) >> 28;
1192 track->SetClIndex(layer, index);
1193 if (TMath::Abs(cl->GetQ())<1.e-13) return 0; // ingore the "virtual" clusters
1194
1195
1196 // Take into account the mis-alignment (bring track to cluster plane)
1197 Double_t xTrOrig=track->GetX();
1198 Double_t trxyz[3]; track->GetXYZ(trxyz);
1199 Float_t xclu1 = cl->GetX();//upgrade clusters tracking coordinate
1200 //Float_t yclu1 = cl->GetY();
1201 //Float_t zclu1 = cl->GetZ();
1202 if (!track->Propagate(xTrOrig+xclu1)){
1203 return 0;
1204 }
1205 AliCluster c(*cl);
1206 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
1207 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
1208 c.SetSigmaYZ(track->GetSigmaYZ(layer));
1209
1210 // Bring the track back to detector plane in ideal geometry
1211 Int_t updated = track->UpdateMI(&c,chi2,index);
1212 if (!track->Propagate(xTrOrig)) {
1213 return 0;
1214 }
1215 if(!updated){
1216 AliDebug(2,"update failed");
1217 }
1218 return updated;
1219}
1220//____________________________________________________________________-
4211bbc5 1221Int_t AliITStrackerUpgrade::CorrectForLayerMaterial(AliITStrackU *t,
1d9af2d5 1222 Int_t layerindex,
1223 Double_t oldGlobXYZ[3],
1224 TString direction) {
1225 //-------------------------------------------------------------------
1226 // Propagate beyond layer and correct for material
1227 // (material budget in different ways according to fUseTGeo value)
1228 // Add time if going outward (PropagateTo or PropagateToTGeo)
1229 //-------------------------------------------------------------------
1230
1231 // Define budget mode:
1232 // 0: material from AliITSRecoParam (hard coded)
1233 // 1: material from TGeo in stepsof X cm (on the fly)
1234 // X = AliITSRecoParam::GetStepSizeTGeo()
1235 // 2: material from lut
1236 // 3: material from TGeo in one step (same for all hypotheses)
1237 Int_t mode;
1238 switch(fUseTGeo) {
1239 case 0:
1240 mode=0;
1241 break;
1242 case 1:
1243 mode=1;
1244 break;
1245 case 2:
1246 mode=2;
1247 break;
1248 case 3:
1249 if(fTrackingPhase.Contains("Clusters2Tracks"))
1250 { mode=3; } else { mode=1; }
1251 break;
1252 case 4:
1253 if(fTrackingPhase.Contains("Clusters2Tracks"))
1254 { mode=3; } else { mode=2; }
1255 break;
1256 default:
1257 mode=0;
1258 break;
1259 }
1260 if(fTrackingPhase.Contains("Default")) {
1261 mode=0;
1262 }
1263 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1264 Double_t r = 0.;
db688ae2 1265 r=fSegmentation->GetRadius(layerindex);
1d9af2d5 1266 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
1267 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
1268 Double_t xToGo;
1269 if (!t->GetLocalXat(rToGo,xToGo)) {
1270 return 0;
1271 }
665c0bc7 1272 Int_t index=fNLayers*fCurrentEsdTrack+layerindex;
1d9af2d5 1273
1274
1275 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
1276 Int_t nsteps=1;
1277 // back before material (no correction)
1278 Double_t rOld,xOld;
1279 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1280 if (!t->GetLocalXat(rOld,xOld)) return 0;
1281 if (!t->Propagate(xOld)) return 0;
1282
1283 switch(mode) {
1284 case 1:
1285 x0=21.82;
db688ae2 1286 xOverX0 = fSegmentation->GetThickness(layerindex)/x0;
1d9af2d5 1287
1288 lengthTimesMeanDensity = xOverX0*x0;
1289 lengthTimesMeanDensity *= dir;
1290 // Bring the track beyond the material
1291 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1292 return 0;
1293 }
1294 break;
1295 case 0:
1296 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1297 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
1298 break;
1299 case 2:
1300 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
1301 xOverX0 = fxOverX0Layer[layerindex];
1302 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
1303 lengthTimesMeanDensity *= dir;
1304 // Bring the track beyond the material
1305 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1306 break;
1307 case 3:
665c0bc7 1308 if(!fxOverX0LayerTrks || index<0 || index>=fNLayers*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
1d9af2d5 1309 if(fxOverX0LayerTrks[index]<0) {
1310 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1311 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
1312 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1313 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1314 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
1315 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1316 return 1;
1317 }
1318 xOverX0 = fxOverX0LayerTrks[index];
1319 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
1320 lengthTimesMeanDensity *= dir;
1321 // Bring the track beyond the material
1322 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1323 return 0;
1324 }
1325 break;
1326 }
1327
1328
1329 return 1;
1330}
1331
1332
1333//_____________________________________________________________________________
0ac80088 1334Double_t AliITStrackerUpgrade::GetPredictedChi2MI(AliITStrackU* track, const AliITSRecPointU *cluster,Int_t layer)
1d9af2d5 1335{
1336 //
1337 // Compute predicted chi2
1338 //
1339 Float_t erry,errz,covyz;
1340 Float_t theta = track->GetTgl();
1341 Float_t phi = track->GetSnp();
1342 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
1343 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz,covyz);
1344 AliDebug(2,Form(" chi2: tr-cl %f %f tr X %f cl X %f",track->GetY()-cluster->GetY(),track->GetZ()-cluster->GetZ(),track->GetX(),cluster->GetX()));
1345 // Take into account the mis-alignment (bring track to cluster plane)
1346 Double_t xTrOrig=track->GetX();
1347 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
1348 AliDebug(2,Form(" chi2: tr-cl %f %f tr X %f cl X %f",track->GetY()-cluster->GetY(),track->GetZ()-cluster->GetZ(),track->GetX(),cluster->GetX()));
1349 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz,covyz);
1350 // Bring the track back to detector plane in ideal geometry
1351 // [mis-alignment will be accounted for in UpdateMI()]
1352 if (!track->Propagate(xTrOrig)) return 1000.;
1353 Float_t ny=0.,nz=0.;
1354 //GetNTeor(layer,cluster,theta,phi,ny,nz);
1355 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
1356 if (delta>1){
1357 chi2+=0.5*TMath::Min(delta/2,2.);
1358 chi2+=2.*cluster->GetDeltaProbability();
1359 }
1360 //
1361 track->SetNy(layer,ny);
1362 track->SetNz(layer,nz);
1363 track->SetSigmaY(layer,erry);
1364 track->SetSigmaZ(layer, errz);
1365 track->SetSigmaYZ(layer,covyz);
4211bbc5 1366
1d9af2d5 1367 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
1368 return chi2;
1369}
1370//________________________________________________________________
1371Int_t AliITStrackerUpgrade::GetError(Int_t /*layer*/,
0ac80088 1372 const AliITSRecPointU *cl,
1d9af2d5 1373 Float_t /*tgl*/,Float_t /*tgphitr*/,Float_t /*expQ*/,
1374 Float_t &erry,Float_t &errz,Float_t &covyz,
1375 Bool_t /*addMisalErr*/)
1376{
1377 //
1378 // Calculate cluster position error for the upgrade
1379 //
1380 Int_t retval=0;
1381 covyz=0.;
1382 retval = GetErrorOrigRecPoint(cl,erry,errz,covyz);
1383
1384
1385
1386 return retval;
1387
1388}
1389//____________________________________________________________________-
1390
0ac80088 1391Int_t AliITStrackerUpgrade::GetErrorOrigRecPoint(const AliITSRecPointU *cl,
1d9af2d5 1392 Float_t &erry,Float_t &errz,Float_t &covyz)
1393{
1394 //
1395 // Calculate cluster position error (just take error from AliITSRecPoint)
1396 //
1397 erry = TMath::Sqrt(cl->GetSigmaY2());
1398 errz = TMath::Sqrt(cl->GetSigmaZ2());
1399 covyz = cl->GetSigmaYZ();
1400 return 1;
1401}
1402//__________________________
0ac80088 1403void AliITStrackerUpgrade::GetNTeor(Int_t layer,const AliITSRecPointU* /*cl*/,
1d9af2d5 1404 Float_t tgl,Float_t tgphitr,
1405 Float_t &ny,Float_t &nz)
1406{
1407 //
1408 // Get "mean shape" (original parametrization from AliITStrackerMI)
1409 //
1410 tgl = TMath::Abs(tgl);
1411 tgphitr = TMath::Abs(tgphitr);
1412
1413 // SPD
1414 if (layer==0) {
1415 ny = 1.+tgphitr*3.2;
1416 nz = 1.+tgl*0.34;
1417 return;
1418 }
1419 if (layer==1) {
1420 ny = 1.+tgphitr*3.2;
1421 nz = 1.+tgl*0.28;
1422 return;
1423 }
1424 // SSD
1425 if (layer==4 || layer==5) {
1426 ny = 2.02+tgphitr*1.95;
1427 nz = 2.02+tgphitr*2.35;
1428 return;
1429 }
1430 // SDD
1431 ny = 6.6-2.7*tgphitr;
1432 nz = 2.8-3.11*tgphitr+0.45*tgl;
1433 return;
1434}
1435//_________________________________________________________________
1436Int_t AliITStrackerUpgrade::PropagateBack(AliESDEvent *event) {
1437 //--------------------------------------------------------------------
1438 // This functions propagates reconstructed ITS tracks back
1439 // The clusters must be loaded !
1440 //--------------------------------------------------------------------
1441 fTrackingPhase="PropagateBack";
1442 Int_t nentr=event->GetNumberOfTracks();
1443 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
1444 Int_t ntrk=0;
1445 for (Int_t i=0; i<nentr; i++) {
1446 AliESDtrack *esd=event->GetTrack(i);
1447
1448 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
1449 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
1450
f059e2be 1451 /*
1452 AliITStrackMI *t=0;
1453 try {
1d9af2d5 1454 t=new AliITStrackMI(*esd);
f059e2be 1455 } catch (const Char_t *msg) {
1d9af2d5 1456 //Warning("PropagateBack",msg);
1457 delete t;
1458 continue;
f059e2be 1459 }
1460 */
4211bbc5 1461 AliITStrackU *t = new AliITStrackU(*esd);
1d9af2d5 1462 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
1463
1464 ResetTrackToFollow(*t);
1465
1466 /*
1467 // propagate to vertex [SR, GSI 17.02.2003]
1468 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
1469 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1470 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
1471 fTrackToFollow.StartTimeIntegral();
1472 // from vertex to outside pipe
1473 CorrectForPipeMaterial(&fTrackToFollow,"outward");
1474 }*/
1475 // Start time integral and add distance from current position to vertex
1476 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
1477 fTrackToFollow.GetXYZ(xyzTrk);
1478 Double_t dst2 = 0.;
1479 for (Int_t icoord=0; icoord<3; icoord++) {
1480 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
1481 dst2 += di*di;
1482 }
1483 fTrackToFollow.StartTimeIntegral();
1484 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
1485
1486 fTrackToFollow.ResetCovariance(10.);
1487 fTrackToFollow.ResetClusters();
1488 //
665c0bc7 1489 Int_t inx[fNLayers];
1490 for (Int_t k=0; k<fNLayers; k++) inx[k]=-1;
1d9af2d5 1491 Int_t nclusters = t->GetNumberOfClusters();
1492 for(Int_t ncl=0;ncl<nclusters;ncl++){
1493 Int_t index = t-> GetClIndex(ncl);
1494 Int_t lay = (index & 0xf0000000) >> 28;
1495 inx[lay]=index;
1496 }
1497 //
665c0bc7 1498 if (RefitAtBase(fSegmentation->GetRadius(fNLayers-1),&fTrackToFollow,inx)) {
1d9af2d5 1499 //fTrackToFollow.SetLabel(t->GetLabel());//
1500 //fTrackToFollow.CookdEdx();
1501 //CookLabel(&fTrackToFollow,0.); //For comparison only
1502 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
db688ae2 1503 //UseClusters(&fTrackToFollow);
1d9af2d5 1504 ntrk++;
1505 }
1506 delete t;
1507 }
1508
1d9af2d5 1509 fTrackingPhase="Default";
1510
1511 return 0;
1512}
1513//_________________________________________________________________________
1514AliCluster *AliITStrackerUpgrade::GetCluster(Int_t index) const {
1515 //--------------------------------------------------------------------
1516 // Return pointer to a given cluster
1517 //--------------------------------------------------------------------
1518 Int_t l=(index & 0xf0000000) >> 28;
0a64515a 1519 Int_t c=(index & 0x0fffffff) >> 0;
84ab81bf 1520 AliDebug(2,Form("index %i cluster index %i layer %i", index,c,l));
0a64515a 1521 return fLayers[l]->GetCluster(c);
1d9af2d5 1522}
1523//______________________________________________________________________________
4211bbc5 1524Int_t AliITStrackerUpgrade::CorrectForPipeMaterial(AliITStrackU *t, TString direction) {
f059e2be 1525 //-------------------------------------------------------------------
1526 // Propagate beyond beam pipe and correct for material
1527 // (material budget in different ways according to fUseTGeo value)
1528 // Add time if going outward (PropagateTo or PropagateToTGeo)
1529 //-------------------------------------------------------------------
1530
1531 // Define budget mode:
1532 // 0: material from AliITSRecoParam (hard coded)
1533 // 1: material from TGeo in one step (on the fly)
1534 // 2: material from lut
1535 // 3: material from TGeo in one step (same for all hypotheses)
1536 Int_t mode;
1537 switch(fUseTGeo) {
1538 case 0:
1539 mode=0;
1540 break;
1541 case 1:
1542 mode=1;
1543 break;
1544 case 2:
1545 mode=2;
1546 break;
1547 case 3:
1548 if(fTrackingPhase.Contains("Clusters2Tracks"))
1549 { mode=3; } else { mode=1; }
1550 break;
1551 case 4:
1552 if(fTrackingPhase.Contains("Clusters2Tracks"))
1553 { mode=3; } else { mode=2; }
1554 break;
1555 default:
1556 mode=0;
1557 break;
1558 }
1559 if(fTrackingPhase.Contains("Default")) mode=0;
1560 Int_t index=fCurrentEsdTrack;
1561
1562 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1563 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
1564 Double_t xToGo;
1565 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
1566
1567 Double_t xOverX0,x0,lengthTimesMeanDensity;
1568
1569 switch(mode) {
1570 case 0:
1571 xOverX0 = AliITSRecoParam::GetdPipe();
1572 x0 = AliITSRecoParam::GetX0Be();
1573 lengthTimesMeanDensity = xOverX0*x0;
1574 lengthTimesMeanDensity *= dir;
1575 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1576 break;
1577 case 1:
1578 if (!t->PropagateToTGeo(xToGo,1)) return 0;
1579 break;
1580 case 2:
1581 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
1582 xOverX0 = fxOverX0Pipe;
1583 lengthTimesMeanDensity = fxTimesRhoPipe;
1584 lengthTimesMeanDensity *= dir;
1585 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1586 break;
1587 case 3:
1588 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
1589 if(fxOverX0PipeTrks[index]<0) {
1590 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
1591 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1592 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1593 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
1594 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1595 return 1;
1596 }
1597 xOverX0 = fxOverX0PipeTrks[index];
1598 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
1599 lengthTimesMeanDensity *= dir;
1600 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1601 break;
1602 }
1603
1604 return 1;
1d9af2d5 1605}
1606//__________________________________________________________________________
1607Int_t AliITStrackerUpgrade::RefitInward(AliESDEvent *event) {
1608 //--------------------------------------------------------------------
1609 // This functions refits ITS tracks using the
1610 // "inward propagated" TPC tracks
1611 // The clusters must be loaded !
1612 //--------------------------------------------------------------------
1613 fTrackingPhase="RefitInward";
1614 Int_t nentr=event->GetNumberOfTracks();
1615 for (Int_t i=0; i<nentr; i++) {
1616 AliESDtrack *esd=event->GetTrack(i);
1617
1618 // if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
1619 // if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
1620 //if (esd->GetStatus()&AliESDtrack::kTPCout)
1621 // if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
4211bbc5 1622 AliITStrackU *t=0;
1d9af2d5 1623 try {
4211bbc5 1624 t=new AliITStrackU(*esd);
1d9af2d5 1625 } catch (const Char_t *msg) {
1626 //Warning("RefitInward",msg);
1627 delete t;
1628 continue;
1629 }
1630
1631 ResetTrackToFollow(*t);
1632 // fTrackToFollow.ResetClusters();
1633 // if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
1634 // fTrackToFollow.ResetCovariance(10.);
1635 //Refitting...
1636 //The beam pipe
f059e2be 1637 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1638 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
1639 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
1640 Double_t r[3]={0.,0.,0.};
1641 Double_t maxD=3.;
1642 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
1643 }
1d9af2d5 1644 delete t;
1645 }
1646
1647 fTrackingPhase="Default";
1648 return 0;
1649}
1650
1651
1652