track labels added
[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"
38#include "AliITSRecPoint.h"
39#include "AliITStrackSA.h"
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//____________________________________________________________________________
51 AliITStrackerUpgrade::AliITStrackerUpgrade():AliITStrackerMI(),
52 fNLayer(6),
53 fPhiEstimate(0),
54 fITSStandAlone(0),
55 fLambdac(0),
56 fPhic(0),
57 fCoef1(0),
58 fCoef2(0),
59 fCoef3(0),
60 fNloop(0),
61 fPhiWin(0),
62 fLambdaWin(0),
63 fVert(0),
64 fVertexer(0),
65 fListOfTracks(0),
66 fListOfSATracks(0),
67 fITSclusters(0),
68 fInwardFlag(0),
69 fOuterStartLayer(0),
70 fInnerStartLayer(5),
71 fMinNPoints(0),
72 fMinQ(0.),
73 fLayers(0),
db688ae2 74 fSegmentation(0x0),
1d9af2d5 75 fCluLayer(0),
76 fCluCoord(0){
77 // Default constructor
78 Init();
79
80 }
81//________________________________________________________________________
82AliITStrackerUpgrade::AliITStrackerUpgrade(const AliITStrackerUpgrade& tracker):AliITStrackerMI(),
83 fNLayer(tracker.fNLayer),
84 fPhiEstimate(tracker.fPhiEstimate),
85 fITSStandAlone(tracker.fITSStandAlone),
86 fLambdac(tracker.fLambdac),
87 fPhic(tracker.fPhic),
88 fCoef1(tracker.fCoef1),
89 fCoef2(tracker.fCoef2),
90 fCoef3(tracker.fCoef3),
91 fNloop(tracker.fNloop),
92 fPhiWin(tracker.fPhiWin),
93 fLambdaWin(tracker.fLambdaWin),
94 fVert(tracker.fVert),
95 fVertexer(tracker.fVertexer),
96 fListOfTracks(tracker.fListOfTracks),
97 fListOfSATracks(tracker.fListOfSATracks),
98 fITSclusters(tracker.fITSclusters),
99 fInwardFlag(tracker.fInwardFlag),
100 fOuterStartLayer(tracker.fOuterStartLayer),
101 fInnerStartLayer(tracker.fInnerStartLayer),
102 fMinNPoints(tracker.fMinNPoints),
103 fMinQ(tracker.fMinQ),
104 fLayers(tracker.fLayers),
db688ae2 105 fSegmentation(tracker.fSegmentation),
1d9af2d5 106 fCluLayer(tracker.fCluLayer),
107 fCluCoord(tracker.fCluCoord) {
108 // Copy constructor
109 for(Int_t i=0;i<2;i++){
110 fPoint1[i]=tracker.fPoint1[i];
111 fPoint2[i]=tracker.fPoint2[i];
112 fPoint3[i]=tracker.fPoint3[i];
113 fPointc[i]=tracker.fPointc[i];
114 }
115 if(tracker.fVertexer && tracker.fVert){
116 fVert = new AliESDVertex(*tracker.fVert);
117 }
118 else {
119 fVert = tracker.fVert;
120 }
121 for(Int_t i=0;i<6;i++){
122 fCluLayer[i] = tracker.fCluLayer[i];
123 fCluCoord[i] = tracker.fCluCoord[i];
124 }
125}
126//______________________________________________________________________
127AliITStrackerUpgrade& AliITStrackerUpgrade::operator=(const AliITStrackerUpgrade& source){
128 // Assignment operator.
129 this->~AliITStrackerUpgrade();
130 new(this) AliITStrackerUpgrade(source);
131 return *this;
132
133}
134
135//____________________________________________________________________________
136AliITStrackerUpgrade::~AliITStrackerUpgrade(){
137 // destructor
138 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
139 // and is deleted here
140 if(fVertexer){
141 if(fVert)delete fVert;
142 }
143 fVert = 0;
144 fVertexer = 0;
145
146 if(fPhiWin)delete []fPhiWin;
147 if(fLambdaWin)delete []fLambdaWin;
148 fListOfTracks->Delete();
149 delete fListOfTracks;
150 fListOfSATracks->Delete();
151 delete fListOfSATracks;
152 if(fCluLayer){
153 for(Int_t i=0;i<6;i++){
154 if(fCluLayer[i]){
155 fCluLayer[i]->Delete();
156 delete fCluLayer[i];
157 }
158 }
159 delete [] fCluLayer;
160 }
161 if(fCluCoord){
162 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
163 if(fCluCoord[i]){
164 fCluCoord[i]->Delete();
165 delete fCluCoord[i];
166 }
167 }
168 delete [] fCluCoord;
169 }
170
db688ae2 171 if(fSegmentation) delete fSegmentation;
1d9af2d5 172}
173
174//____________________________________________________________________________
175Int_t AliITStrackerUpgrade::Clusters2Tracks(AliESDEvent *event){
176 // This method is used to find and fit the tracks. By default the corresponding
177 // method in the parent class is invoked. In this way a combined tracking
178 // TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
179 // is done in the ITS only. In the standard reconstruction chain this option
180 // can be set via AliReconstruction::SetOption("ITS","onlyITS")
181 Int_t rc=0;
182 if(!fITSStandAlone){
183 rc=AliITStrackerMI::Clusters2Tracks(event);
184 }
185 else {
186 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
187 }
188 if(!rc){
189 rc=FindTracks(event,kFALSE);
190 if(AliITSReconstructor::GetRecoParam()->GetSAUseAllClusters()==kTRUE) {
191 rc=FindTracks(event,kTRUE);
192 }
193 }
194 return rc;
195}
196//_________________________________________________-
197void AliITStrackerUpgrade::Init(){
198 // Reset all data members
199 fPhiEstimate=0;
200 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
201 fLambdac=0;
202 fPhic=0;
203 fCoef1=0;
204 fCoef2=0;
205 fCoef3=0;
206 fPointc[0]=0;
207 fPointc[1]=0;
208 fVert = 0;
209 fVertexer = 0;
210 Int_t nLoops=AliITSReconstructor::GetRecoParam()->GetNLoopsSA();
211 if(nLoops==33){
212 SetFixedWindowSizes();
213 }else{
214 Double_t phimin=AliITSReconstructor::GetRecoParam()->GetMinPhiSA();
215 Double_t phimax=AliITSReconstructor::GetRecoParam()->GetMaxPhiSA();
216 Double_t lambmin=AliITSReconstructor::GetRecoParam()->GetMinLambdaSA();
217 Double_t lambmax=AliITSReconstructor::GetRecoParam()->GetMaxLambdaSA();
218 SetCalculatedWindowSizes(nLoops,phimin,phimax,lambmin,lambmax);
219 }
220 fMinQ=AliITSReconstructor::GetRecoParam()->GetSAMinClusterCharge();
221 fITSclusters = 0;
222 SetOuterStartLayer(1);
223 SetSAFlag(kFALSE);
224 fListOfTracks=new TClonesArray("AliITStrackMI",100);
225 fListOfSATracks=new TClonesArray("AliITStrackSA",100);
226 fLayers=new AliITSlayerUpgrade*[6];//to be fixed
227 fCluLayer = 0;
228 fCluCoord = 0;
229 fMinNPoints = 3;
1d9af2d5 230 for(Int_t layer=0; layer<6; layer++){
231 Double_t p=0.;
232 Double_t zC= 0.;
233 fLayers[layer] = new AliITSlayerUpgrade(p,zC);
234 }
235
db688ae2 236 fSegmentation = new AliITSsegmentationUpgrade();
1d9af2d5 237
238}
239//_______________________________________________________________________
240Int_t AliITStrackerUpgrade::LoadClusters(TTree *clusTree){
8d499867 241//
242// Load clusters for tracking
243//
244
1d9af2d5 245 TClonesArray statITSCluster("AliITSRecPoint");
8d499867 246 TClonesArray *ITSCluster = &statITSCluster;
247
1d9af2d5 248 TBranch* itsClusterBranch=clusTree->GetBranch("ITSRecPoints");
249 if (!itsClusterBranch){
6ea6235b 250 AliError("can't get the branch with the ITS clusters ! \n");
1d9af2d5 251 return 1;
252 }
253 itsClusterBranch->SetAddress(&ITSCluster);
8d499867 254 clusTree->GetEvent(0);
1d9af2d5 255 Int_t nCluster = ITSCluster->GetEntriesFast();
256 for(Int_t i=0; i<nCluster; i++){
257 AliITSRecPoint *recp = (AliITSRecPoint*)ITSCluster->UncheckedAt(i);
8d499867 258 fLayers[recp->GetLayer()]->InsertCluster(new AliITSRecPoint(*recp));
1d9af2d5 259 }//loop clusters
8d499867 260
1d9af2d5 261 SetClusterTree(clusTree);
262 return 0;
263}
264
265//_______________________________________________________
266void AliITStrackerUpgrade::ResetForFinding(){
267 // Reset data members used in all loops during track finding
268 fPhiEstimate=0;
269 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
270 fLambdac=0;
271 fPhic=0;
272 fCoef1=0;
273 fCoef2=0;
274 fCoef3=0;
275 fPointc[0]=0;
276 fPointc[1]=0;
277 fListOfTracks->Clear();
278 fListOfSATracks->Clear();
279}
280
281
282
283//______________________________________________________________________
284Int_t AliITStrackerUpgrade::FindTracks(AliESDEvent* event,Bool_t useAllClusters){
285
286 // Track finder using the ESD object
287 AliDebug(2,Form(" field is %f",event->GetMagneticField()));
288 printf(" field is %f",event->GetMagneticField());
289 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
290 if(!fITSclusters){
291 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
292 return -1;
293 }
294
295 //Reads event and mark clusters of traks already found, with flag kITSin
296 Int_t nentr=event->GetNumberOfTracks();
297 if(!useAllClusters) {
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++){
304 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
305 cll->SetBit(kSAflag);
306 }
307 }
308 }
309 }else{
310 while (nentr--) {
311 AliESDtrack *track=event->GetTrack(nentr);
312 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
313 Int_t idx[12];
314 Int_t ncl = track->GetITSclusters(idx);
315 for(Int_t k=0;k<ncl;k++){
316 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
317 cll->ResetBit(kSAflag);
318 }
319 }
320 }
321 }
322 //Get primary vertex
323 Double_t primaryVertex[3];
324 event->GetVertex()->GetXYZ(primaryVertex);
325 Int_t nclusters[/*AliITSsegmentationUpgrade::GetNLayers()*/6]={0,0,0,0,0,0};
326 Int_t dmar[/*AliITSsegmentationUpgrade::GetNLayers()*/6]={0,0,0,0,0,0};
327 if (fCluLayer == 0) {
328 fCluLayer = new TClonesArray*[6];
329 fCluCoord = new TClonesArray*[6];
330 for(Int_t i=0;i<6;i++) {
331 fCluLayer[i]=0;
332 fCluCoord[i]=0;
333 }
334 }
335 for(Int_t i=0;i<6;i++){
336 if (!ForceSkippingOfLayer(i)) {
337 for(Int_t cli=0;cli<fLayers[i]->GetNumberOfClusters();cli++){
338 AliITSRecPoint* cls = (AliITSRecPoint*)fLayers[i]->GetCluster(cli);
339 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
340 if(cls->GetQ()==0) continue; //fake clusters dead zones
341 if(i>1 && cls->GetQ()<=fMinQ) continue; // cut on SDD and SSD cluster charge
342 nclusters[i]++;
343 }
344 }
345 dmar[i]=0;
346 if(!fCluLayer[i]){
347 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
348 }else{
349 fCluLayer[i]->Delete();
350 fCluLayer[i]->Expand(nclusters[i]);
351 }
352 if(!fCluCoord[i]){
353 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
354 }else{
355 fCluCoord[i]->Delete();
356 fCluCoord[i]->Expand(nclusters[i]);
357 }
358 }
359 for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
360 TClonesArray &clulay = *fCluLayer[ilay];
361 TClonesArray &clucoo = *fCluCoord[ilay];
362 if (!ForceSkippingOfLayer(ilay)){
8d499867 363 AliDebug(2,Form("number of clusters in layer %i : %i",ilay,fLayers[ilay]->GetNumberOfClusters()));
1d9af2d5 364 for(Int_t cli=0;cli<fLayers[ilay]->GetNumberOfClusters();cli++){
365 AliITSRecPoint* cls = (AliITSRecPoint*)fLayers[ilay]->GetCluster(cli);
366 if(cls->TestBit(kSAflag)==kTRUE) continue;
367 if(cls->GetQ()==0) continue;
368 Double_t phi=0;Double_t lambda=0;
369 Double_t x=0;Double_t y=0;Double_t z=0;
370 Float_t sx=0;Float_t sy=0;Float_t sz=0;
371 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
372 GetCoorErrors(cls,sx,sy,sz);
373 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
374 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
375 dmar[ilay]++;
376 }
db688ae2 377 } else AliDebug(2,Form("Force skipping layer %i",ilay));
1d9af2d5 378 }
379
380
381 // track counter
382 Int_t ntrack=0;
383
384 static Int_t nClusLay[6];//counter for clusters on each layer
385 Int_t startLayForSeed=0;
386 Int_t lastLayForSeed=fOuterStartLayer;
387 Int_t nSeedSteps=lastLayForSeed-startLayForSeed;
388 Int_t seedStep=1;
389 if(fInwardFlag){
390 startLayForSeed=6-1;
391 lastLayForSeed=fInnerStartLayer;
392 nSeedSteps=startLayForSeed-lastLayForSeed;
393 seedStep=-1;
394 }
395 // loop on minimum number of points
396 for(Int_t iMinNPoints=6; iMinNPoints>=fMinNPoints; iMinNPoints--) {
397 // loop on starting layer for track finding
398 for(Int_t iSeedLay=0; iSeedLay<=nSeedSteps; iSeedLay++) {
399 Int_t theLay=startLayForSeed+iSeedLay*seedStep;
400 if(ForceSkippingOfLayer(theLay)) continue;
401 Int_t minNPoints=iMinNPoints-theLay;
402 if(fInwardFlag) minNPoints=iMinNPoints-(6-1-theLay);
403 for(Int_t i=theLay+1;i<6;i++)
404 if(ForceSkippingOfLayer(i))
405 minNPoints--;
406 if(minNPoints<fMinNPoints) continue;
407
408 // loop on phi and lambda window size
409 for(Int_t nloop=0;nloop<fNloop;nloop++){
410 Int_t nclTheLay=fCluLayer[theLay]->GetEntries();
411 while(nclTheLay--){
412 ResetForFinding();
413 Bool_t useRP=SetFirstPoint(theLay,nclTheLay,primaryVertex);
414 if(!useRP) continue;
415 AliITStrackSA trs;
416
417 Int_t pflag=0;
418 Int_t kk;
419 for(kk=0;kk<6;kk++) nClusLay[kk] = 0;
420
421 kk=0;
422 nClusLay[kk] = SearchClusters(theLay,fPhiWin[nloop],fLambdaWin[nloop],
423 &trs,primaryVertex[2],pflag);
424 Int_t nextLay=theLay+seedStep;
425 Bool_t goon=kTRUE;
426 while(goon){
427
428 kk++;
429 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
430 &trs,primaryVertex[2],pflag);
431 if(nClusLay[kk]!=0){
432
433 pflag=1;
434 if(kk==1) {
435 fPoint3[0]=fPointc[0];
436 fPoint3[1]=fPointc[1];
437 } else {
438 UpdatePoints();
439 }
440 }
441 nextLay+=seedStep;
442 if(nextLay<0 || nextLay==6) goon=kFALSE;
443 }
444
445
446 Int_t layOK=0;
447 if(!fInwardFlag){
448 for(Int_t nnp=0;nnp<6-theLay;nnp++){
449 if(nClusLay[nnp]!=0) layOK+=1;
450 }
451 }else{
452 for(Int_t nnp=theLay; nnp>=0; nnp--){
453 if(nClusLay[nnp]!=0) layOK+=1;
454 }
455 }
456 if(layOK>=minNPoints){
457 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]));
458 AliITStrackV2* tr2 = 0;
459 Bool_t onePoint = kFALSE;
460 tr2 = FitTrack(&trs,primaryVertex,onePoint);
461 if(!tr2){
462 continue;
463 }
464 AliDebug(2,Form("---NPOINTS fit: %d\n",tr2->GetNumberOfClusters()));
465
466 StoreTrack(tr2,event,useAllClusters);
467 ntrack++;
468
469 }
470
471 }//end loop on clusters of theLay
472 } //end loop on window sizes
473 } //end loop on theLay
474 }//end loop on min points
475 if(!useAllClusters) AliInfo(Form("Number of found tracks: %d",event->GetNumberOfTracks()));
476
477 ResetForFinding();
478 return 0;
479
480}
481
482//________________________________________________________________________
483
484AliITStrackV2* AliITStrackerUpgrade::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex,Bool_t onePoint) {
485
486
487 const Int_t kMaxClu=AliITStrackSA::kMaxNumberOfClusters;
488
489
490 static Int_t clind[6][kMaxClu];
491 static Int_t clmark[6][kMaxClu];
492 static Int_t end[6];
493 static AliITSRecPoint *listlayer[6][kMaxClu];
494
495 for(Int_t i=0;i<6;i++) {
496 end[i]=0;
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 }
503 Int_t inx[6];
504 for (Int_t k=0; k<6; k++) inx[k]=-1;
505 Int_t nclusters = tr->GetNumberOfClustersSA();
506 for(Int_t ncl=0;ncl<nclusters;ncl++){
507 Int_t index = tr->GetClusterIndexSA(ncl);
508 Int_t lay = (index & 0xf0000000) >> 28;
509 Int_t cli = index&0x0fffffff;
510 AliITSRecPoint* cl = (AliITSRecPoint*)fLayers[lay]->GetCluster(cli);
511 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
512 inx[lay]=index;
513
514 Int_t nInLay=end[lay];
515 listlayer[lay][nInLay]=cl;
516 clind[lay][nInLay]=index;
517 end[lay]++;
518 }
519
520 for(Int_t nlay=0;nlay<6;nlay++){
521 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
522 Int_t mark = tr->GetClusterMark(nlay,ncl);
523 clmark[nlay][ncl]=mark;
524 }
525 }
526
527
528 Int_t firstLay=-1,secondLay=-1;
529 for(Int_t i=0;i<6;i++) {
530 if(end[i]==0) {
531 end[i]=1;
532 }else{
533 if(firstLay==-1) {
534 firstLay=i;
535 } else if(secondLay==-1) {
536 secondLay=i;
537 }
538 }
539 }
540
541 if(firstLay==-1 || (secondLay==-1 && !onePoint)) return 0;
542 TClonesArray &arrMI= *fListOfTracks;
543 TClonesArray &arrSA= *fListOfSATracks;
544 Int_t nFoundTracks=0;
545
546 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
547 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0][l0];
548 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
549 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1][l1];
550 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
551 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2][l2];
552 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
553 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3][l3];
554 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
555 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4][l4];
556 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
557 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5][l5];
558
559
560 Double_t x1,y1,z1,sx1,sy1,sz1;
561 Double_t x2,y2,z2,sx2,sy2,sz2;
562 AliITSRecPoint* p1=0;
563 AliITSRecPoint* p2=0;
564 Int_t index1=0,index2=0;
565 Int_t mrk1=0,mrk2=0;
566
567 switch(firstLay) {
568 case 0:
569 p1=cl0;
570 index1=clind[0][l0];mrk1=clmark[0][l0];
571 break;
572 case 1:
573 p1=cl1;
574 index1=clind[1][l1];mrk1=clmark[1][l1];
575 break;
576 case 2:
577 p1=cl2;
578 index1=clind[2][l2];mrk1=clmark[2][l2];
579 break;
580 case 3:
581 p1=cl3;
582 index1=clind[3][l3];mrk1=clmark[3][l3];
583 break;
584 case 4:
585 p1=cl4;
586 index1=clind[4][l4];mrk1=clmark[4][l4];
587 break;
588 }
589
590 switch(secondLay) {
591 case 1:
592 p2=cl1;
593 index2=clind[1][l1];mrk2=clmark[1][l1];
594 break;
595 case 2:
596 p2=cl2;
597 index2=clind[2][l2];mrk2=clmark[2][l2];
598 break;
599 case 3:
600 p2=cl3;
601 index2=clind[3][l3];mrk2=clmark[3][l3];
602 break;
603 case 4:
604 p2=cl4;
605 index2=clind[4][l4];mrk2=clmark[4][l4];
606 break;
607 case 5:
608 p2=cl5;
609 index2=clind[5][l5];mrk2=clmark[5][l5];
610 break;
611 default:
612 p2=0;
613 index2=-1;mrk2=-1;
614 break;
615 }
616
617 Int_t layer = 0;
618 Double_t radius = 0.;
619 Double_t yclu1 = p1->GetY();
620 Double_t zclu1 = p1->GetZ();
621 layer=p1->GetLayer();
db688ae2 622 fSegmentation->GetRadius(layer);
1d9af2d5 623 Double_t cv=0.,tgl2=0.,phi2=0.;
624 Int_t cln1=mrk1;
625 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1);
626 x1 = arr1->GetX();
627 y1 = arr1->GetY();
628 z1 = arr1->GetZ();
629 sx1 = arr1->GetSx();
630 sy1 = arr1->GetSy();
631 sz1 = arr1->GetSz();
632
633 if(secondLay>0) {
634 Int_t cln2=mrk2;
635 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2);
636 x2 = arr2->GetX();
637 y2 = arr2->GetY();
638 z2 = arr2->GetZ();
639 sx2 = arr2->GetSx();
640 sy2 = arr2->GetSy();
641 sz2 = arr2->GetSz();
642 cv = Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
643 tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
644 phi2 = TMath::ATan2((y2-y1),(x2-x1));
645 }
646 Double_t x,y,z = 0.;
647 Double_t xz[2];
648 xz[0]= p1->GetDetLocalX();
649 xz[1]= p1->GetDetLocalZ();
650 Bool_t check2;
db688ae2 651 check2 = fSegmentation->DetToGlobal(layer,xz[0], xz[1],x,y,z);
1d9af2d5 652
653
654 Double_t phiclrad, phicldeg;
655 phiclrad=TMath::ATan2(y,x);
656 if (phiclrad<0) phiclrad+=TMath::TwoPi();
657 else if (phiclrad>=TMath::TwoPi()) phiclrad-=TMath::TwoPi();
658
659 phicldeg=180.*phiclrad/TMath::Pi();
660 Int_t ladder=(Int_t)(phicldeg/18.);//virtual segmentation
661 Double_t alpha= (ladder*18.+9.)*TMath::Pi()/180.;
662
663
664 AliITStrackSA trac(alpha,radius,yclu1,zclu1,phi2,tgl2,cv,1);
665
666
667 if(cl5!=0) {
668 trac.AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0);
669 trac.AddClusterMark(5,clmark[5][l5]);
670 }
671 if(cl4!=0){
672 trac.AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0);
673 trac.AddClusterMark(4,clmark[4][l4]);
674 }
675 if(cl3!=0){
676 trac.AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0);
677 trac.AddClusterMark(3,clmark[3][l3]);
678 }
679 if(cl2!=0){
680 trac.AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0);
681 trac.AddClusterMark(2,clmark[2][l2]);
682 }
683 if(cl1!=0){
684 trac.AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0);
685 trac.AddClusterMark(1,clmark[1][l1]);
686 }
687 if(cl0!=0){
688 trac.AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0);
689 trac.AddClusterMark(0,clmark[0][l0]);
690 }
691
692 //fit with Kalman filter using AliITStrackerMI::RefitAtBase()
693 AliITStrackSA ot(trac);
694 ot.ResetCovariance(10.);
695 ot.ResetClusters();
696
697 // Propagate inside the innermost layer with a cluster
698 if(ot.Propagate(ot.GetX()-0.1*ot.GetX())) {
699 Double_t rt=0.;
db688ae2 700 rt=fSegmentation->GetRadius(5);
1d9af2d5 701 if(RefitAtBase(rt,&ot,inx)){ //fit from layer 1 to layer 6
702 AliITStrackMI otrack2(ot);
703 otrack2.ResetCovariance(10.);
704 otrack2.ResetClusters();
705
706 //fit from layer 6 to layer 1
db688ae2 707 if(RefitAtBase(/*AliITSRecoParam::GetrInsideSPD1()*/fSegmentation->GetRadius(0),&otrack2,inx)) {//check clind
1d9af2d5 708 new(arrMI[nFoundTracks]) AliITStrackMI(otrack2);
709 new(arrSA[nFoundTracks]) AliITStrackSA(trac);
710 ++nFoundTracks;
711 }
712
713 }
714 }
715 }//end loop layer 6
716 }//end loop layer 5
717 }//end loop layer 4
718 }//end loop layer 3
719 }//end loop layer 2
720 }//end loop layer 1
721
722
723
724
725 if(fListOfTracks->GetEntries()==0) return 0;
726
727 Int_t lowchi2 = FindTrackLowChiSquare();
728 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
729 AliITStrackSA* trsa = (AliITStrackSA*)fListOfSATracks->At(lowchi2);
730
731 if(otrack==0) {
732 return 0;
733 }
0a64515a 734
735 CookLabel(otrack,0.); //MI change - to see fake ratio
736 Int_t label=FindLabel(otrack);
737 otrack->SetLabel(label);
738
739
1d9af2d5 740 Int_t indexc[6];
741 for(Int_t i=0;i<6;i++) indexc[i]=0;
742 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
743 indexc[nind] = otrack->GetClusterIndex(nind);
744 }
745
746 //remove clusters of found track
747 for(Int_t nlay=0;nlay<6;nlay++){
748 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
749 Int_t index = trsa->GetClusterMark(nlay,cln);
750 fCluLayer[nlay]->RemoveAt(index);
751 RemoveClusterCoord(nlay,index);
752 fCluLayer[nlay]->Compress();
753 }
754 }
755 return otrack;
756
757}
758
759//_______________________________________________________
760void AliITStrackerUpgrade::StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) /*const*/
761{
762 //
763 // Add new track to the ESD
764 //
765 AliESDtrack outtrack;
766 outtrack.UpdateTrackParams(t,AliESDtrack::kITSin);
767 if(pureSA) outtrack.SetStatus(AliESDtrack::kITSpureSA);
768 outtrack.SetStatus(AliESDtrack::kITSout);
769 outtrack.SetStatus(AliESDtrack::kITSrefit);
770 Double_t sdedx[4]={0.,0.,0.,0.};
771 for(Int_t i=0; i<4; i++) sdedx[i]=t->GetSampledEdx(i);
772 outtrack.SetITSdEdxSamples(sdedx);
773 event->AddTrack(&outtrack);
774 return;
775}
776
777
778//_______________________________________________________
779Int_t AliITStrackerUpgrade::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){
780 //function used to to find the clusters associated to the track
781
8d499867 782 AliDebug(2,"Starting...");
783 if(ForceSkippingOfLayer(layer)) {
784 AliDebug(2,Form("Forcing skipping of layer %i. Exiting",layer));
785 return 0;
786 }
1d9af2d5 787
788 Int_t nc=0;
db688ae2 789 Double_t r=fSegmentation->GetRadius(layer);
1d9af2d5 790 if(pflag==1){
791 Float_t cx1,cx2,cy1,cy2;
792 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
793 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
794 return 0;
795 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
796 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
797 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
798 }
799
800
801 Int_t ncl = fCluLayer[layer]->GetEntries();
8d499867 802 AliDebug(2,Form(" Number of clusters %i in layer %i.",ncl,layer));
1d9af2d5 803 for (Int_t index=0; index<ncl; index++) {
804 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
805 if (!c) continue;
806 if (c->GetQ()<=0) continue;
807 if(layer>1 && c->GetQ()<=fMinQ) continue;
808
809 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
810
811 Double_t phi;
812 Double_t xT,yT;
813 xT=arr->GetX();
814 yT=arr->GetY();
815 phi=arr->GetPhi();
816 if (TMath::Abs(phi-fPhiEstimate)>phiwindow)
817 {
818 continue;
819 }
820
821 Double_t lambda = arr->GetLambda();
822 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
823
824 if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0;
825 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
826 Int_t orind = arr->GetOrInd();
827 trs->AddClusterSA(layer,orind);
828 trs->AddClusterMark(layer,index);
829
830 nc++;
831 fLambdac=lambda;
832 fPhiEstimate=phi;
833
834 fPointc[0]=arr->GetX();
835 fPointc[1]=arr->GetY();
836 }
837 return nc;
838}
839
840//________________________________________________________________
841Bool_t AliITStrackerUpgrade::SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex){
842 // Sets the first point (seed) for tracking
843
844 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[lay]->At(clu);
845 if(!cl) return kFALSE;
846 if (cl->GetQ()<=0) return kFALSE;
847 if(lay>1 && cl->GetQ()<=fMinQ) return kFALSE;
848 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(lay,clu);
849 fPhic = arr->GetPhi();
850 fLambdac = arr->GetLambda();
851 fPhiEstimate = fPhic;
852 fPoint1[0]=primaryVertex[0];
853 fPoint1[1]=primaryVertex[1];
854 fPoint2[0]=arr->GetX();
855 fPoint2[1]=arr->GetY();
856 return kTRUE;
857}
858
859//________________________________________________________________
860void AliITStrackerUpgrade::UpdatePoints(){
861 //update of points for the estimation of the curvature
862
863 fPoint2[0]=fPoint3[0];
864 fPoint2[1]=fPoint3[1];
865 fPoint3[0]=fPointc[0];
866 fPoint3[1]=fPointc[1];
867
868
869}
870
871//___________________________________________________________________
872Int_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){
873
874 //given (x,y) of three recpoints (in global coordinates)
875 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
876
877 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
878 if(den==0) return 0;
879 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
880 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
881 c = -x1*x1-y1*y1-a*x1-b*y1;
882 return 1;
883}
884//__________________________________________________________________________
885Int_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){
886
887 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
888 //c2 is -rlayer*rlayer
889
890 if(a1==0) return 0;
891 Double_t m = c2-c1;
892 Double_t aA = (b1*b1)/(a1*a1)+1;
893 Double_t bB = (-2*m*b1/(a1*a1));
894 Double_t cC = c2+(m*m)/(a1*a1);
895 Double_t dD = bB*bB-4*aA*cC;
896 if(dD<0) return 0;
897
898 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
899 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
900 x1 = (c2-c1-b1*y1)/a1;
901 x2 = (c2-c1-b1*y2)/a1;
902
903 return 1;
904}
905//____________________________________________________________________
906Double_t AliITStrackerUpgrade::Curvature(Double_t x1,Double_t y1,Double_t
907 x2,Double_t y2,Double_t x3,Double_t y3){
908
909 //calculates the curvature of track
910 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
911 if(den==0) return 0;
912 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
913 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
914 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
915 Double_t xc=-a/2.;
916
917 if((a*a+b*b-4*c)<0) return 0;
918 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
919 if(rad==0) return 0;
920
921 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
922 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
923 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
924 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
925
926 return 1/rad;
927
928}
929
930
931//____________________________________________________________________
932Double_t AliITStrackerUpgrade::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
933
934 //Returns the point closest to pp
935
936 Double_t diff1 = p1-pp;
937 Double_t diff2 = p2-pp;
938
939 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
940 else fPhiEstimate=p2;
941 return fPhiEstimate;
942
943}
944
945
946//_________________________________________________________________
947Int_t AliITStrackerUpgrade::FindTrackLowChiSquare() const {
948 // returns track with lowest chi square
949 Int_t dim=fListOfTracks->GetEntries();
950 if(dim<=1) return 0;
951 AliITStrackV2* trk = (AliITStrackV2*)fListOfTracks->At(0);
952 Double_t minChi2=trk->GetChi2();
953 Int_t index=0;
954 for(Int_t i=1;i<dim;i++){
955 trk = (AliITStrackV2*)fListOfTracks->At(i);
956 Double_t chi2=trk->GetChi2();
957 if(chi2<minChi2){
958 minChi2=chi2;
959 index=i;
960 }
961 }
962 return index;
963}
964
965//__________________________________________________________
0a64515a 966Int_t AliITStrackerUpgrade::FindLabel(AliITStrackV2* track) const {
967 //
1d9af2d5 968
0a64515a 969 Int_t labl[AliITSgeomTGeo::kNLayers][3];
970 Int_t cnts[AliITSgeomTGeo::kNLayers][3];
971 for(Int_t j=0;j<AliITSgeomTGeo::GetNLayers();j++){
972 for(Int_t k=0;k<3;k++){
973 labl[j][k]=-2;
974 cnts[j][k]=1;
975 }
976 }
977 Int_t iNotLabel=0;
978 for(Int_t i=0;i<track->GetNumberOfClusters(); i++) {
979 Int_t indexc = track->GetClusterIndex(i);
980 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc);
981 AliDebug(2,Form(" cluster index %i ",indexc));
982 Int_t iLayer=cl->GetLayer();
983 for(Int_t k=0;k<3;k++){
984 labl[iLayer][k]=cl->GetLabel(k);
985 if(labl[iLayer][k]<0) iNotLabel++;
986 }
987 }
988 if(iNotLabel==3*track->GetNumberOfClusters()) return -2;
989
990 for(Int_t j1=0;j1<AliITSgeomTGeo::kNLayers; j1++) {
991 for(Int_t j2=0; j2<j1; j2++){
992 for(Int_t k1=0; k1<3; k1++){
993 for(Int_t k2=0; k2<3; k2++){
994 if(labl[j1][k1]>=0 && labl[j1][k1]==labl[j2][k2] && cnts[j2][k2]>0){
995 cnts[j2][k2]++;
996 cnts[j1][k1]=0;
997 }
998 }
999 }
1000 }
1001 }
1d9af2d5 1002
0a64515a 1003
1004 Int_t cntMax=0;
1005 Int_t label=-1;
1006 for(Int_t j=0;j<AliITSgeomTGeo::kNLayers;j++){
1007 for(Int_t k=0;k<3;k++){
1008 if(cnts[j][k]>cntMax && labl[j][k]>=0){
1009 cntMax=cnts[j][k];
1010 label=labl[j][k];
1011 }
1012 }
1013 }
1014
1015 Int_t lflag=0;
1016 for(Int_t i=0;i<AliITSgeomTGeo::kNLayers;i++)
1017 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
1018 if(lflag<track->GetNumberOfClusters()) label = -label;
1019 return label;
1d9af2d5 1020}
1d9af2d5 1021//_____________________________________________________________________________
1022/*Int_t AliITStrackerUpgrade::Label(Int_t gl1, Int_t gl2, Int_t gl3, Int_t gl4, Int_t gl5, Int_t gl6,Int_t gl7, Int_t gl8, Int_t gl9, Int_t gl10,Int_t gl11,
1023 Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){
1024
1025
1026 //function used to assign label to the found track. If track is fake, the label is negative
1027
1028 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1029 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1030 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1031 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1032 Int_t lflag=0;Int_t num=6;
1033 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1034
1035 for(Int_t i=0;i<num;i++){
1036 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1037 }
1038
1039 if(lflag>=minNPoints) return ll;
1040 else return -ll;
1041
1042
1043 }
1044*/
1045//_____________________________________________________________________________
1046void AliITStrackerUpgrade::SetCalculatedWindowSizes(Int_t n, Float_t phimin, Float_t phimax, Float_t lambdamin, Float_t lambdamax){
1047 // Set sizes of the phi and lambda windows used for track finding
1048 fNloop = n;
1049 if(fPhiWin) delete [] fPhiWin;
1050 if(fLambdaWin) delete [] fLambdaWin;
1051 fPhiWin = new Double_t[fNloop];
1052 fLambdaWin = new Double_t[fNloop];
1053 Float_t stepPhi=(phimax-phimin)/(Float_t)(fNloop-1);
1054 Float_t stepLambda=(lambdamax-lambdamin)/(Float_t)(fNloop-1);
1055 for(Int_t k=0;k<fNloop;k++){
1056 Float_t phi=phimin+k*stepPhi;
1057 Float_t lam=lambdamin+k*stepLambda;
1058 fPhiWin[k]=phi;
1059 fLambdaWin[k]=lam;
1060 }
1061}
1062//_____________________________________________________________________________
1063void AliITStrackerUpgrade::SetFixedWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1064 // Set sizes of the phi and lambda windows used for track finding
1065 fNloop = n;
1066 if(phi){ // user defined values
1067 fPhiWin = new Double_t[fNloop];
1068 fLambdaWin = new Double_t[fNloop];
1069 for(Int_t k=0;k<fNloop;k++){
1070 fPhiWin[k]=phi[k];
1071 fLambdaWin[k]=lam[k];
1072 }
1073 }
1074 else { // default values
1075
1076 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
1077 0.005,0.0053,0.0055,
1078 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1079 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
1080 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1081 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1082 0.005,0.005,0.006,
1083 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1084 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1085 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
1086
1087 if(fNloop!=33){
1088 fNloop = 33;
1089 }
1090
1091
1092 fPhiWin = new Double_t[fNloop];
1093 fLambdaWin = new Double_t[fNloop];
1094
1095 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes();
1096
1097 for(Int_t k=0;k<fNloop;k++){
1098 fPhiWin[k]=phid[k]*factor;
1099 fLambdaWin[k]=lambdad[k]*factor;
1100 }
1101
1102 }
1103
1104}
1105//_______________________________________________________________________
1106void AliITStrackerUpgrade::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Double_t &x, Double_t &y,Double_t &z,Double_t* vertex){
1107 //Returns values of phi (azimuthal) and lambda angles for a given cluster
1108 /*
1109 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1110 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1111 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1112
1113 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1114 Double_t phi1=TMath::Pi()/2+alpha;
1115 if (lay==1) phi1+=TMath::Pi();
1116
1117 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1118 Float_t r=tx*cp+ty*sp;
1119
1120 xyz= r*cp - cl->GetY()*sp;
1121 y= r*sp + cl->GetY()*cp;
1122 z=cl->GetZ();
1123 */
1124
1125 Double_t xz[2];
1126 xz[0]= cl->GetDetLocalX();
1127 xz[1]= cl->GetDetLocalZ() ;
1d9af2d5 1128 Bool_t check2;
1129 Int_t ilayer;
1130 ilayer = cl->GetLayer();
db688ae2 1131 check2 = fSegmentation->DetToGlobal(ilayer,xz[0], xz[1],x,y,z);
1d9af2d5 1132
1133 if(x!=0 && y!=0)
1134 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
1135 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1136}
1137
1138//________________________________________________________________________
1139void AliITStrackerUpgrade::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
1140
1141 //returns sigmax, y, z of cluster in global coordinates
1142 /*
1143 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1144 Int_t lay,lad,det;
1145 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
1146
1147 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1148 Double_t phi=TMath::Pi()/2+alpha;
1149 if (lay==1) phi+=TMath::Pi();
1150
1151 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
1152 */
1153 Float_t covm[6];
1154 cl->GetGlobalCov(covm);
1155 sx=TMath::Sqrt(covm[0]);
1156 sy=TMath::Sqrt(covm[3]);
1157 sz=TMath::Sqrt(covm[5]);
1158
1159
1160
1161 // Float_t covm[6];
1162 // cl->GetGlobalCov(covm);
1163 // sx=12*1e-04;//TMath::Sqrt(covm[0]);
1164 // sy=12*1e-04;//TMath::Sqrt(covm[3]);
1165 // sz=40*1e-04;//TMath::Sqrt(covm[5]);
1166 /*
1167 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1168 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1169 sz = TMath::Sqrt(cl->GetSigmaZ2());
1170 */
1171}
1172//_____________________________________________________________
1173void AliITStrackerUpgrade::UnloadClusters() {
1174 //--------------------------------------------------------------------
1175 //This function unloads ITS clusters
1176 //--------------------------------------------------------------------
1177 for (Int_t i=0; i<6; i++) fLayers[i]->ResetClusters();
1178}
1179//______________________________________________________________________
1180Bool_t AliITStrackerUpgrade::RefitAtBase(Double_t xx,AliITStrackMI *track,
1181 const Int_t *clusters)
1182{
1183 //--------------------------------------------------------------------
1184 // Simplified version for ITS upgrade studies -- does not use module info
1185 //--------------------------------------------------------------------
1186 Int_t index[AliITSgeomTGeo::kNLayers];
1187 Int_t k;
1188 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
1189 //
1190 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
1191 index[k]=clusters[k];
1192 }
1d9af2d5 1193
1194 ULong_t trStatus=0;
1195 if(track->GetESDtrack()) trStatus=track->GetStatus();
1196 Int_t innermostlayer=0;
1197 if(trStatus&AliESDtrack::kTPCin) {
1198 innermostlayer=5;
1199 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
1200 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
db688ae2 1201 if( (drphi < (fSegmentation->GetRadius(innermostlayer)+1.)) ||
1d9af2d5 1202 index[innermostlayer] >= 0 ) break;
1203 }
1204 AliDebug(2,Form(" drphi %f innermost %d",drphi,innermostlayer));
1205 }
1206
1207 Int_t from, to, step;
1208 if (xx > track->GetX()) {
1209 from=innermostlayer; to=6;
1210 step=+1;
1211 } else {
1212 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
1213 step=-1;
1214 }
1215 TString dir = (step>0 ? "outward" : "inward");
1216
1217 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
1218 Double_t r=0.;
db688ae2 1219 r=fSegmentation->GetRadius(ilayer);
1d9af2d5 1220
1221 if (step<0 && xx>r){
1222 break;
1223 }
1224
1225 // material between SSD and SDD, SDD and SPD
1226 // Double_t hI=ilayer-0.5*step;
1227 // if (TMath::Abs(hI-3.5)<0.01) // SDDouter
1228 // if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
1229 // if (TMath::Abs(hI-1.5)<0.01) // SPDouter
1230 // if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
1231
1232
1233 Double_t oldGlobXYZ[3];
1234
1235 if (!track->GetXYZ(oldGlobXYZ)) {
1236 return kFALSE;
1237 }
1238 // continue if we are already beyond this layer
1239 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1240 if(step>0 && oldGlobR > r){
1241 continue; // going outward
1242 }
1243 if(step<0 && oldGlobR < r) {
1244 continue; // going inward
1245 }
1246 Double_t phi,z;
1247 if (!track->GetPhiZat(r,phi,z)){
1248 return kFALSE;
1249 }
1250 // only for ITS-SA tracks refit
1251 track->SetCheckInvariant(kFALSE);
1252
1253 if (phi<0) phi+=TMath::TwoPi();//from 0 to 360 (rad)
1254 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();//
1255 Double_t phideg=0.;
1256 phideg=180.*phi/TMath::Pi();// in deg
1257 Int_t ladder=(Int_t)(phideg/18.);// virtual segmentation
1258 Double_t alpha= (ladder*18.+9.)*TMath::Pi()/180.;
1259
1260 if (!track->Propagate(alpha,r)) {
1d9af2d5 1261 return kFALSE;
1262 }
1263
1264 const AliITSRecPoint *clAcc=0;
1265 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
1266
1267 Int_t idx=index[ilayer];
1268 if (idx>=0) { // cluster in this layer
1269 Int_t cli = idx&0x0fffffff;
1270 const AliITSRecPoint *cl=(AliITSRecPoint *)fLayers[ilayer]->GetCluster(cli);
1271
1272 if (cl) {
1273 Int_t cllayer = (idx & 0xf0000000) >> 28;;
1274 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
1275 if (chi2<maxchi2) {
1276 clAcc=cl;
1277 maxchi2=chi2;
1278 } else {
8d499867 1279 return kFALSE;
1d9af2d5 1280 }
1281 }
1282 }
1283
1284 if (clAcc) {
1285 if (!UpdateMI(track,clAcc,maxchi2,idx)){
1286 return kFALSE;
1287 }
1288 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
1289 }
1290
1291
1292 // Correct for material of the current layer
1293 // cross material
1294 // add time if going outward
1295 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)){
1296 return kFALSE;
1297 }
1298 track->SetCheckInvariant(kFALSE);
1299 } // end loop on layers
1300
1301 if (!track->PropagateTo(xx,0.,0.)){
1302 return kFALSE;
8d499867 1303 }
1d9af2d5 1304 return kTRUE;
1305}
1306
1307//_____________________________________________________________________
1308Int_t AliITStrackerUpgrade::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
1309{
1310 //
1311 // Update ITS track
1312 //
1313 Int_t layer = (index & 0xf0000000) >> 28;
1314 track->SetClIndex(layer, index);
1315 if (TMath::Abs(cl->GetQ())<1.e-13) return 0; // ingore the "virtual" clusters
1316
1317
1318 // Take into account the mis-alignment (bring track to cluster plane)
1319 Double_t xTrOrig=track->GetX();
1320 Double_t trxyz[3]; track->GetXYZ(trxyz);
1321 Float_t xclu1 = cl->GetX();//upgrade clusters tracking coordinate
1322 //Float_t yclu1 = cl->GetY();
1323 //Float_t zclu1 = cl->GetZ();
1324 if (!track->Propagate(xTrOrig+xclu1)){
1325 return 0;
1326 }
1327 AliCluster c(*cl);
1328 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
1329 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
1330 c.SetSigmaYZ(track->GetSigmaYZ(layer));
1331
1332 // Bring the track back to detector plane in ideal geometry
1333 Int_t updated = track->UpdateMI(&c,chi2,index);
1334 if (!track->Propagate(xTrOrig)) {
1335 return 0;
1336 }
1337 if(!updated){
1338 AliDebug(2,"update failed");
1339 }
1340 return updated;
1341}
1342//____________________________________________________________________-
1343Int_t AliITStrackerUpgrade::CorrectForLayerMaterial(AliITStrackMI *t,
1344 Int_t layerindex,
1345 Double_t oldGlobXYZ[3],
1346 TString direction) {
1347 //-------------------------------------------------------------------
1348 // Propagate beyond layer and correct for material
1349 // (material budget in different ways according to fUseTGeo value)
1350 // Add time if going outward (PropagateTo or PropagateToTGeo)
1351 //-------------------------------------------------------------------
1352
1353 // Define budget mode:
1354 // 0: material from AliITSRecoParam (hard coded)
1355 // 1: material from TGeo in stepsof X cm (on the fly)
1356 // X = AliITSRecoParam::GetStepSizeTGeo()
1357 // 2: material from lut
1358 // 3: material from TGeo in one step (same for all hypotheses)
1359 Int_t mode;
1360 switch(fUseTGeo) {
1361 case 0:
1362 mode=0;
1363 break;
1364 case 1:
1365 mode=1;
1366 break;
1367 case 2:
1368 mode=2;
1369 break;
1370 case 3:
1371 if(fTrackingPhase.Contains("Clusters2Tracks"))
1372 { mode=3; } else { mode=1; }
1373 break;
1374 case 4:
1375 if(fTrackingPhase.Contains("Clusters2Tracks"))
1376 { mode=3; } else { mode=2; }
1377 break;
1378 default:
1379 mode=0;
1380 break;
1381 }
1382 if(fTrackingPhase.Contains("Default")) {
1383 mode=0;
1384 }
1385 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1386 Double_t r = 0.;
db688ae2 1387 r=fSegmentation->GetRadius(layerindex);
1d9af2d5 1388 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
1389 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
1390 Double_t xToGo;
1391 if (!t->GetLocalXat(rToGo,xToGo)) {
1392 return 0;
1393 }
1394 Int_t index=6*fCurrentEsdTrack+layerindex;
1395
1396
1397 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
1398 Int_t nsteps=1;
1399 // back before material (no correction)
1400 Double_t rOld,xOld;
1401 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1402 if (!t->GetLocalXat(rOld,xOld)) return 0;
1403 if (!t->Propagate(xOld)) return 0;
1404
1405 switch(mode) {
1406 case 1:
1407 x0=21.82;
db688ae2 1408 xOverX0 = fSegmentation->GetThickness(layerindex)/x0;
1d9af2d5 1409
1410 lengthTimesMeanDensity = xOverX0*x0;
1411 lengthTimesMeanDensity *= dir;
1412 // Bring the track beyond the material
1413 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1414 return 0;
1415 }
1416 break;
1417 case 0:
1418 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1419 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
1420 break;
1421 case 2:
1422 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
1423 xOverX0 = fxOverX0Layer[layerindex];
1424 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
1425 lengthTimesMeanDensity *= dir;
1426 // Bring the track beyond the material
1427 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1428 break;
1429 case 3:
1430 if(!fxOverX0LayerTrks || index<0 || index>=6*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
1431 if(fxOverX0LayerTrks[index]<0) {
1432 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1433 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
1434 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1435 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1436 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
1437 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1438 return 1;
1439 }
1440 xOverX0 = fxOverX0LayerTrks[index];
1441 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
1442 lengthTimesMeanDensity *= dir;
1443 // Bring the track beyond the material
1444 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1445 return 0;
1446 }
1447 break;
1448 }
1449
1450
1451 return 1;
1452}
1453
1454
1455//_____________________________________________________________________________
1456Double_t AliITStrackerUpgrade::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
1457{
1458 //
1459 // Compute predicted chi2
1460 //
1461 Float_t erry,errz,covyz;
1462 Float_t theta = track->GetTgl();
1463 Float_t phi = track->GetSnp();
1464 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
1465 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz,covyz);
1466 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()));
1467 // Take into account the mis-alignment (bring track to cluster plane)
1468 Double_t xTrOrig=track->GetX();
1469 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
1470 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()));
1471 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz,covyz);
1472 // Bring the track back to detector plane in ideal geometry
1473 // [mis-alignment will be accounted for in UpdateMI()]
1474 if (!track->Propagate(xTrOrig)) return 1000.;
1475 Float_t ny=0.,nz=0.;
1476 //GetNTeor(layer,cluster,theta,phi,ny,nz);
1477 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
1478 if (delta>1){
1479 chi2+=0.5*TMath::Min(delta/2,2.);
1480 chi2+=2.*cluster->GetDeltaProbability();
1481 }
1482 //
1483 track->SetNy(layer,ny);
1484 track->SetNz(layer,nz);
1485 track->SetSigmaY(layer,erry);
1486 track->SetSigmaZ(layer, errz);
1487 track->SetSigmaYZ(layer,covyz);
1488 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
1489 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
1490 return chi2;
1491}
1492//________________________________________________________________
1493Int_t AliITStrackerUpgrade::GetError(Int_t /*layer*/,
1494 const AliITSRecPoint *cl,
1495 Float_t /*tgl*/,Float_t /*tgphitr*/,Float_t /*expQ*/,
1496 Float_t &erry,Float_t &errz,Float_t &covyz,
1497 Bool_t /*addMisalErr*/)
1498{
1499 //
1500 // Calculate cluster position error for the upgrade
1501 //
1502 Int_t retval=0;
1503 covyz=0.;
1504 retval = GetErrorOrigRecPoint(cl,erry,errz,covyz);
1505
1506
1507
1508 return retval;
1509
1510}
1511//____________________________________________________________________-
1512
1513Int_t AliITStrackerUpgrade::GetErrorOrigRecPoint(const AliITSRecPoint*cl,
1514 Float_t &erry,Float_t &errz,Float_t &covyz)
1515{
1516 //
1517 // Calculate cluster position error (just take error from AliITSRecPoint)
1518 //
1519 erry = TMath::Sqrt(cl->GetSigmaY2());
1520 errz = TMath::Sqrt(cl->GetSigmaZ2());
1521 covyz = cl->GetSigmaYZ();
1522 return 1;
1523}
1524//__________________________
1525void AliITStrackerUpgrade::GetNTeor(Int_t layer,const AliITSRecPoint* /*cl*/,
1526 Float_t tgl,Float_t tgphitr,
1527 Float_t &ny,Float_t &nz)
1528{
1529 //
1530 // Get "mean shape" (original parametrization from AliITStrackerMI)
1531 //
1532 tgl = TMath::Abs(tgl);
1533 tgphitr = TMath::Abs(tgphitr);
1534
1535 // SPD
1536 if (layer==0) {
1537 ny = 1.+tgphitr*3.2;
1538 nz = 1.+tgl*0.34;
1539 return;
1540 }
1541 if (layer==1) {
1542 ny = 1.+tgphitr*3.2;
1543 nz = 1.+tgl*0.28;
1544 return;
1545 }
1546 // SSD
1547 if (layer==4 || layer==5) {
1548 ny = 2.02+tgphitr*1.95;
1549 nz = 2.02+tgphitr*2.35;
1550 return;
1551 }
1552 // SDD
1553 ny = 6.6-2.7*tgphitr;
1554 nz = 2.8-3.11*tgphitr+0.45*tgl;
1555 return;
1556}
1557//_________________________________________________________________
1558Int_t AliITStrackerUpgrade::PropagateBack(AliESDEvent *event) {
1559 //--------------------------------------------------------------------
1560 // This functions propagates reconstructed ITS tracks back
1561 // The clusters must be loaded !
1562 //--------------------------------------------------------------------
1563 fTrackingPhase="PropagateBack";
1564 Int_t nentr=event->GetNumberOfTracks();
1565 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
1566 Int_t ntrk=0;
1567 for (Int_t i=0; i<nentr; i++) {
1568 AliESDtrack *esd=event->GetTrack(i);
1569
1570 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
1571 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
1572
db688ae2 1573/*
1d9af2d5 1574 AliITStrackMI *t=0;
1575 try {
1576 t=new AliITStrackMI(*esd);
1577 } catch (const Char_t *msg) {
1578 //Warning("PropagateBack",msg);
1579 delete t;
1580 continue;
1581 }
db688ae2 1582*/
1583 AliITStrackMI *t = new AliITStrackMI(*esd);
1d9af2d5 1584 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
1585
1586 ResetTrackToFollow(*t);
1587
1588 /*
1589 // propagate to vertex [SR, GSI 17.02.2003]
1590 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
1591 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1592 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
1593 fTrackToFollow.StartTimeIntegral();
1594 // from vertex to outside pipe
1595 CorrectForPipeMaterial(&fTrackToFollow,"outward");
1596 }*/
1597 // Start time integral and add distance from current position to vertex
1598 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
1599 fTrackToFollow.GetXYZ(xyzTrk);
1600 Double_t dst2 = 0.;
1601 for (Int_t icoord=0; icoord<3; icoord++) {
1602 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
1603 dst2 += di*di;
1604 }
1605 fTrackToFollow.StartTimeIntegral();
1606 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
1607
1608 fTrackToFollow.ResetCovariance(10.);
1609 fTrackToFollow.ResetClusters();
1610 //
1611 Int_t inx[6];
1612 for (Int_t k=0; k<6; k++) inx[k]=-1;
1613 Int_t nclusters = t->GetNumberOfClusters();
1614 for(Int_t ncl=0;ncl<nclusters;ncl++){
1615 Int_t index = t-> GetClIndex(ncl);
1616 Int_t lay = (index & 0xf0000000) >> 28;
1617 inx[lay]=index;
1618 }
1619 //
1620 if (RefitAtBase(43.6,&fTrackToFollow,inx)) {
1621 //fTrackToFollow.SetLabel(t->GetLabel());//
1622 //fTrackToFollow.CookdEdx();
1623 //CookLabel(&fTrackToFollow,0.); //For comparison only
1624 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
db688ae2 1625 //UseClusters(&fTrackToFollow);
1d9af2d5 1626 ntrk++;
1627 }
1628 delete t;
1629 }
1630
1631 AliInfo(Form("Number of back propagated ITS tracks: %d out of %d ESD tracks",ntrk,nentr));
1632
1633 fTrackingPhase="Default";
1634
1635 return 0;
1636}
1637//_________________________________________________________________________
1638AliCluster *AliITStrackerUpgrade::GetCluster(Int_t index) const {
1639 //--------------------------------------------------------------------
1640 // Return pointer to a given cluster
1641 //--------------------------------------------------------------------
1642 Int_t l=(index & 0xf0000000) >> 28;
0a64515a 1643 Int_t c=(index & 0x0fffffff) >> 0;
1d9af2d5 1644 AliInfo(Form("index %i cluster index %i layer %i", index,index & 0x0fffffff,index & 0xf0000000));
0a64515a 1645 return fLayers[l]->GetCluster(c);
1d9af2d5 1646}
1647//______________________________________________________________________________
1648Int_t AliITStrackerUpgrade::CorrectForPipeMaterial(AliITStrackMI *t, TString direction) {
1649//-------------------------------------------------------------------
1650// Propagate beyond beam pipe and correct for material
1651// (material budget in different ways according to fUseTGeo value)
1652// Add time if going outward (PropagateTo or PropagateToTGeo)
1653//-------------------------------------------------------------------
1654
1655// Define budget mode:
1656// 0: material from AliITSRecoParam (hard coded)
1657// 1: material from TGeo in one step (on the fly)
1658// 2: material from lut
1659// 3: material from TGeo in one step (same for all hypotheses)
1660Int_t mode;
1661switch(fUseTGeo) {
1662 case 0:
1663 mode=0;
1664 break;
1665 case 1:
1666 mode=1;
1667 break;
1668 case 2:
1669 mode=2;
1670 break;
1671 case 3:
1672 if(fTrackingPhase.Contains("Clusters2Tracks"))
1673 { mode=3; } else { mode=1; }
1674 break;
1675 case 4:
1676 if(fTrackingPhase.Contains("Clusters2Tracks"))
1677 { mode=3; } else { mode=2; }
1678 break;
1679 default:
1680 mode=0;
1681 break;
1682 }
1683if(fTrackingPhase.Contains("Default")) mode=0;
1684Int_t index=fCurrentEsdTrack;
1685
1686Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1687Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
1688Double_t xToGo;
1689if (!t->GetLocalXat(rToGo,xToGo)) return 0;
1690
1691Double_t xOverX0,x0,lengthTimesMeanDensity;
1692
1693switch(mode) {
0a64515a 1694 case 0:
1d9af2d5 1695 xOverX0 = AliITSRecoParam::GetdPipe();
1696 x0 = AliITSRecoParam::GetX0Be();
1697 lengthTimesMeanDensity = xOverX0*x0;
1698 lengthTimesMeanDensity *= dir;
1699 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1700 break;
0a64515a 1701 case 1:
1702 if (!t->PropagateToTGeo(xToGo,20)) return 0; // "20" removes the d0 mean shift of ~20 um -> To be understood.
1d9af2d5 1703 break;
1704 case 2:
1705 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
1706 xOverX0 = fxOverX0Pipe;
1707 lengthTimesMeanDensity = fxTimesRhoPipe;
1708 lengthTimesMeanDensity *= dir;
1709 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1710 break;
1711 case 3:
1712 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
1713 if(fxOverX0PipeTrks[index]<0) {
1714 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
1715 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1716 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1717 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
1718 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1719 return 1;
1720 }
1721 xOverX0 = fxOverX0PipeTrks[index];
1722 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
1723 lengthTimesMeanDensity *= dir;
1724 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1725 break;
1726 }
1727
1728return 1;
1729}
1730//__________________________________________________________________________
1731Int_t AliITStrackerUpgrade::RefitInward(AliESDEvent *event) {
1732 //--------------------------------------------------------------------
1733 // This functions refits ITS tracks using the
1734 // "inward propagated" TPC tracks
1735 // The clusters must be loaded !
1736 //--------------------------------------------------------------------
1737 fTrackingPhase="RefitInward";
1738 Int_t nentr=event->GetNumberOfTracks();
1739 for (Int_t i=0; i<nentr; i++) {
1740 AliESDtrack *esd=event->GetTrack(i);
1741
1742 // if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
1743 // if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
1744 //if (esd->GetStatus()&AliESDtrack::kTPCout)
1745 // if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
1746 AliITStrackMI *t=0;
1747 try {
1748 t=new AliITStrackMI(*esd);
1749 } catch (const Char_t *msg) {
1750 //Warning("RefitInward",msg);
1751 delete t;
1752 continue;
1753 }
1754
1755 ResetTrackToFollow(*t);
1756 // fTrackToFollow.ResetClusters();
1757 // if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
1758 // fTrackToFollow.ResetCovariance(10.);
1759 //Refitting...
1760 //The beam pipe
1761 // if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1762 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
1763 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
1764 Double_t r[3]={0.,0.,0.};
1765 Double_t maxD=3.;
1766 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
1767 // }
1768 delete t;
1769 }
1770
1771 fTrackingPhase="Default";
1772 return 0;
1773}
1774
1775
1776