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13918578 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
bf6adc12 16/* $Id$ */
17
13918578 18////////////////////////////////////////////////////
19// Stand alone tracker class //
20// Origin: Elisabetta Crescio //
21// e-mail: crescio@to.infn.it //
22// tracks are saved as AliITStrackV2 objects //
23////////////////////////////////////////////////////
24
aa4b78e1 25#include <stdlib.h>
bf6adc12 26
27#include <TArrayI.h>
13918578 28#include <TBranch.h>
13918578 29#include <TObjArray.h>
30#include <TTree.h>
bf6adc12 31
af885e0f 32#include "AliESDEvent.h"
bf6adc12 33#include "AliESDVertex.h"
34#include "AliESDtrack.h"
bf6adc12 35#include "AliITSVertexer.h"
13918578 36#include "AliITSclusterTable.h"
00a7cc50 37#include "AliITSRecPoint.h"
cc088660 38#include "AliITSgeomTGeo.h"
13918578 39#include "AliITStrackSA.h"
bf6adc12 40#include "AliITStrackerSA.h"
41#include "AliRun.h"
13918578 42
43ClassImp(AliITStrackerSA)
44
45//____________________________________________________________________________
e399f961 46AliITStrackerSA::AliITStrackerSA():AliITStrackerMI(),
47fPhiEstimate(0),
1966f03c 48fITSStandAlone(0),
e399f961 49fLambdac(0),
50fPhic(0),
51fCoef1(0),
52fCoef2(0),
53fCoef3(0),
54fNloop(0),
55fPhiWin(0),
56fLambdaWin(0),
57fVert(0),
58fVertexer(0),
e399f961 59fListOfTracks(0),
60fITSclusters(0),
61fSixPoints(0),
b8ed1a92 62fOuterStartLayer(0),
e399f961 63fCluLayer(0),
64fCluCoord(0){
13918578 65 // Default constructor
66 Init();
627b6db6 67
13918578 68}
2257f27e 69//____________________________________________________________________________
cc088660 70AliITStrackerSA::AliITStrackerSA(const Char_t *geom):AliITStrackerMI(0),
e399f961 71fPhiEstimate(0),
1966f03c 72fITSStandAlone(0),
e399f961 73fLambdac(0),
74fPhic(0),
75fCoef1(0),
76fCoef2(0),
77fCoef3(0),
78fNloop(0),
79fPhiWin(0),
80fLambdaWin(0),
81fVert(0),
82fVertexer(0),
e399f961 83fListOfTracks(0),
84fITSclusters(0),
85fSixPoints(0),
b8ed1a92 86fOuterStartLayer(0),
e399f961 87fCluLayer(0),
88fCluCoord(0)
2257f27e 89{
90 // Standard constructor (Vertex is known and passed to this obj.)
cc088660 91 if (geom) {
92 AliWarning("\"geom\" is actually a dummy argument !");
93 }
94
2257f27e 95 Init();
96 fVert = 0;
627b6db6 97
2257f27e 98}
99
13918578 100//____________________________________________________________________________
cc088660 101AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliESDVertex *vert):AliITStrackerMI(0),
e399f961 102fPhiEstimate(0),
1966f03c 103fITSStandAlone(0),
e399f961 104fLambdac(0),
105fPhic(0),
106fCoef1(0),
107fCoef2(0),
108fCoef3(0),
109fNloop(0),
110fPhiWin(0),
111fLambdaWin(0),
112fVert(vert),
113fVertexer(0),
e399f961 114fListOfTracks(0),
115fITSclusters(0),
116fSixPoints(0),
b8ed1a92 117fOuterStartLayer(0),
e399f961 118fCluLayer(0),
1966f03c 119fCluCoord(0)
13918578 120{
121 // Standard constructor (Vertex is known and passed to this obj.)
cc088660 122 if (geom) {
123 AliWarning("\"geom\" is actually a dummy argument !");
124 }
13918578 125 Init();
627b6db6 126
13918578 127}
128
13918578 129//____________________________________________________________________________
cc088660 130AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliITSVertexer *vertexer):AliITStrackerMI(0),
e399f961 131fPhiEstimate(0),
1966f03c 132fITSStandAlone(0),
e399f961 133fLambdac(0),
134fPhic(0),
135fCoef1(0),
136fCoef2(0),
137fCoef3(0),
138fNloop(0),
139fPhiWin(0),
140fLambdaWin(0),
141fVert(),
142fVertexer(vertexer),
e399f961 143fListOfTracks(0),
144fITSclusters(0),
145fSixPoints(0),
b8ed1a92 146fOuterStartLayer(0),
e399f961 147fCluLayer(0),
1966f03c 148fCluCoord(0)
13918578 149{
150 // Standard constructor (Vertex is unknown - vertexer is passed to this obj)
cc088660 151 if (geom) {
152 AliWarning("\"geom\" is actually a dummy argument !");
153 }
13918578 154 Init();
155 fVertexer = vertexer;
627b6db6 156
13918578 157}
158
159//____________________________________________________________________________
e399f961 160AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(),
161fPhiEstimate(tracker.fPhiEstimate),
1966f03c 162fITSStandAlone(tracker.fITSStandAlone),
e399f961 163fLambdac(tracker.fLambdac),
164fPhic(tracker.fPhic),
165fCoef1(tracker.fCoef1),
166fCoef2(tracker.fCoef2),
167fCoef3(tracker.fCoef3),
168fNloop(tracker.fNloop),
169fPhiWin(tracker.fPhiWin),
170fLambdaWin(tracker.fLambdaWin),
171fVert(tracker.fVert),
172fVertexer(tracker.fVertexer),
e399f961 173fListOfTracks(tracker.fListOfTracks),
174fITSclusters(tracker.fITSclusters),
175fSixPoints(tracker.fSixPoints),
b8ed1a92 176fOuterStartLayer(tracker.fOuterStartLayer),
e399f961 177fCluLayer(tracker.fCluLayer),
178fCluCoord(tracker.fCluCoord) {
13918578 179 // Copy constructor
13918578 180 for(Int_t i=0;i<2;i++){
181 fPoint1[i]=tracker.fPoint1[i];
182 fPoint2[i]=tracker.fPoint2[i];
183 fPoint3[i]=tracker.fPoint3[i];
184 fPointc[i]=tracker.fPointc[i];
185 }
13918578 186 if(tracker.fVertexer && tracker.fVert){
d681bb2d 187 fVert = new AliESDVertex(*tracker.fVert);
13918578 188 }
189 else {
190 fVert = tracker.fVert;
191 }
cc088660 192 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 193 fCluLayer[i] = tracker.fCluLayer[i];
194 fCluCoord[i] = tracker.fCluCoord[i];
195 }
13918578 196}
7d62fb64 197//______________________________________________________________________
e399f961 198AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& source){
199 // Assignment operator.
200 this->~AliITStrackerSA();
201 new(this) AliITStrackerSA(source);
202 return *this;
203
7d62fb64 204}
13918578 205
206//____________________________________________________________________________
207AliITStrackerSA::~AliITStrackerSA(){
208 // destructor
d681bb2d 209 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
13918578 210 // and is deleted here
211 if(fVertexer){
212 if(fVert)delete fVert;
213 }
214 fVert = 0;
215 fVertexer = 0;
7e5bf5af 216
13918578 217 if(fPhiWin)delete []fPhiWin;
218 if(fLambdaWin)delete []fLambdaWin;
4e05ab9a 219 fListOfTracks->Delete();
adda6c2b 220 delete fListOfTracks;
7e5bf5af 221 if(fCluLayer){
cc088660 222 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 223 if(fCluLayer[i]){
224 fCluLayer[i]->Delete();
225 delete fCluLayer[i];
226 }
227 }
228 delete [] fCluLayer;
229 }
230 if(fCluCoord){
cc088660 231 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 232 if(fCluCoord[i]){
233 fCluCoord[i]->Delete();
234 delete fCluCoord[i];
235 }
236 }
237 delete [] fCluCoord;
627b6db6 238 }
7e5bf5af 239
7e5bf5af 240}
13918578 241
1966f03c 242//____________________________________________________________________________
af885e0f 243Int_t AliITStrackerSA::Clusters2Tracks(AliESDEvent *event){
1966f03c 244// This method is used to find and fit the tracks. By default the corresponding
245// method in the parent class is invoked. In this way a combined tracking
246// TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
247// is done in the ITS only. In the standard reconstruction chain this option
248// can be set via AliReconstruction::SetOption("ITS","onlyITS")
249 Int_t rc=0;
250 if(!fITSStandAlone){
251 rc=AliITStrackerMI::Clusters2Tracks(event);
252 }
253 else {
254 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
255 }
256 if(!rc) rc=FindTracks(event);
257 return rc;
258}
259
13918578 260//____________________________________________________________________________
261void AliITStrackerSA::Init(){
262 // Reset all data members
263 fPhiEstimate=0;
264 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
265 fLambdac=0;
266 fPhic=0;
267 fCoef1=0;
268 fCoef2=0;
269 fCoef3=0;
270 fPointc[0]=0;
271 fPointc[1]=0;
272 fVert = 0;
273 fVertexer = 0;
13918578 274 SetWindowSizes();
2257f27e 275 fITSclusters = 0;
276 SetSixPoints();
b8ed1a92 277 SetOuterStartLayer(0);
1966f03c 278 SetSAFlag(kFALSE);
4e05ab9a 279 fListOfTracks=new TObjArray(0,0);
7e5bf5af 280 fCluLayer = 0;
281 fCluCoord = 0;
627b6db6 282 }
13918578 283//_______________________________________________________________________
284void AliITStrackerSA::ResetForFinding(){
285 // Reset data members used in all loops during track finding
286 fPhiEstimate=0;
287 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
288 fLambdac=0;
289 fPhic=0;
290 fCoef1=0;
291 fCoef2=0;
292 fCoef3=0;
293 fPointc[0]=0;
294 fPointc[1]=0;
4e05ab9a 295 fListOfTracks->Delete();
13918578 296}
bef31448 297
7e5bf5af 298
2257f27e 299
bef31448 300//______________________________________________________________________
af885e0f 301Int_t AliITStrackerSA::FindTracks(AliESDEvent* event){
bef31448 302
7e5bf5af 303// Track finder using the ESD object
304
2257f27e 305
7e5bf5af 306 //controllare numero cluster sui layer1 e 2 (morti?)
307 //non trova tracce...controllare..
4e05ab9a 308
2257f27e 309 if(!fITSclusters){
310 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
311 return -1;
bef31448 312 }
7e5bf5af 313
314
315 //Reads event and mark clusters of traks already found, with flag kITSin
316 Int_t nentr=event->GetNumberOfTracks();
317 while (nentr--) {
318 AliESDtrack *track=event->GetTrack(nentr);
319 if (track->GetStatus()&AliESDtrack::kITSin==AliESDtrack::kITSin){
ef7253ac 320 Int_t idx[12];
7e5bf5af 321 Int_t ncl = track->GetITSclusters(idx);
322 for(Int_t k=0;k<ncl;k++){
00a7cc50 323 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
7e5bf5af 324 cll->SetBit(kSAflag);
325 }
326 }
327 }
328
b8ed1a92 329 //Get primary vertex
7e5bf5af 330 Double_t primaryVertex[3];
331 event->GetVertex()->GetXYZ(primaryVertex);
332 //Creates TClonesArray with clusters for each layer. The clusters already used
333 //by AliITStrackerMI are not considered
334
335 Int_t nclusters[6]={0,0,0,0,0,0};
336 Int_t dmar[6]={0,0,0,0,0,0};
adda6c2b 337 if (fCluLayer == 0) {
cc088660 338 fCluLayer = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
339 fCluCoord = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
adda6c2b 340 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
341 fCluLayer[i]=0;
342 fCluCoord[i]=0;
343 }
344 }
cc088660 345 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 346 AliITSlayer &layer=fgLayers[i];
347 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
00a7cc50 348 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
7e5bf5af 349 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
350 if(cls->GetQ()==0) continue; //fake clusters dead zones
351 nclusters[i]++;
352 }
353 dmar[i]=0;
adda6c2b 354 delete fCluLayer[i];
00a7cc50 355 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
adda6c2b 356 delete fCluCoord[i];
7e5bf5af 357 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
358 }
359
360
cc088660 361 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
362 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
363 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
7e5bf5af 364 }
365
cc088660 366 for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
7e5bf5af 367 TClonesArray &clulay = *fCluLayer[ilay];
368 TClonesArray &clucoo = *fCluCoord[ilay];
369 AliITSlayer &layer=fgLayers[ilay];
370 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
00a7cc50 371 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
7e5bf5af 372 if(cls->TestBit(kSAflag)==kTRUE) continue;
373 if(cls->GetQ()==0) continue;
374 Double_t phi=0;Double_t lambda=0;
375 Float_t x=0;Float_t y=0;Float_t z=0;
376 Float_t sx=0;Float_t sy=0;Float_t sz=0;
cc088660 377 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
378 GetCoorErrors(cls,sx,sy,sz);
00a7cc50 379 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
7e5bf5af 380 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
381 dmar[ilay]++;
382 }
383 }
384
2257f27e 385
7e5bf5af 386
387 Int_t ntrack=0;
388 //loop on the different windows
389 for(Int_t nloop=0;nloop<fNloop;nloop++){
390 for(Int_t ncl=0;ncl<fCluLayer[0]->GetEntries();ncl++){ //loop starting from layer 0
391
392 ResetForFinding();
393 Int_t pflag=0;
394
00a7cc50 395 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[0]->At(ncl);
7e5bf5af 396
397 if(!cl) continue;
398
399
400 if (cl->GetQ()<=0) continue;
401
402 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(0,ncl);
403 fPhic = arr->GetPhi();
404 fLambdac = arr->GetLambda();
405 if (TMath::Abs(fLambdac)>0.26*TMath::Pi()) continue;
406 fPhiEstimate = fPhic;
407 AliITStrackSA* trs = new AliITStrackSA();
408 fPoint1[0]=primaryVertex[0];
409 fPoint1[1]=primaryVertex[1];
410
411
412 fPoint2[0]=arr->GetX();
413 fPoint2[1]=arr->GetY();
cc088660 414 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()];//counter for clusters on each layer
415 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ nn[i]=0;}
7e5bf5af 416 nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
417
418 nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 419 if(nn[1]>0){
420 pflag=1;
421 fPoint3[0] = fPointc[0];
422 fPoint3[1] = fPointc[1];
423 }
cfe729e0 424 nn[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 425 if(nn[1]==0 && nn[2]==0) pflag=0;
426 if(nn[2]!=0 && nn[1]!=0){ pflag=1; UpdatePoints();}
427 if(nn[2]!=0 && nn[1]==0){
428 pflag=1;
429 fPoint3[0]=fPointc[0];
430 fPoint3[1]=fPointc[1];
431 }
13918578 432
cfe729e0 433 nn[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 434 pflag=1;
435 if(nn[3]!=0) UpdatePoints();
cfe729e0 436 nn[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 437 pflag=1;
438 if(nn[4]!=0) UpdatePoints();
cfe729e0 439 nn[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 440
441
442 Int_t layOK=0;
443 Int_t numberofpoints;
2257f27e 444 if(fSixPoints) numberofpoints=6; //check of the candidate track
bef31448 445 else numberofpoints=5; //if track is good (with the required number
cc088660 446 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers();nnp++){ //of points) it is written on file
bef31448 447 if(nn[nnp]!=0) layOK+=1;
448 }
449 if(layOK>=numberofpoints){
7e5bf5af 450
451 AliITStrackV2* tr2 = FitTrack(trs,primaryVertex);
bef31448 452
7e5bf5af 453 if(tr2==0) continue;
454
bef31448 455 AliESDtrack outtrack;
456 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
457 event->AddTrack(&outtrack);
bef31448 458 ntrack++;
bef31448 459 }
7e5bf5af 460
461
bef31448 462 delete trs;
2257f27e 463 delete[] nn;
627b6db6 464
7e5bf5af 465 }//end loop on clusters of layer1
627b6db6 466
7e5bf5af 467 //end loop2
468 }
bef31448 469
7e5bf5af 470 //if 5/6 points are required, second loop starting
b8ed1a92 471 //from second layer (SPD2), to find tracks with point of
472 //layer 1 missing
473 if(!fSixPoints) {
474 //printf("looking from SPD2\n");
7e5bf5af 475 // counter for clusters on each layer
cc088660 476 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-1];
7e5bf5af 477 for(Int_t nloop=0;nloop<fNloop;nloop++){
478 Int_t ncl2=fCluLayer[1]->GetEntries();
479 while(ncl2--){ //loop starting from layer 2
480 ResetForFinding();
481 Int_t pflag=0;
00a7cc50 482 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[1]->At(ncl2);
7e5bf5af 483
484 if(!cl) continue;
485 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(1,ncl2);
486 fPhic = arr->GetPhi();
487 fLambdac = arr->GetLambda();
488 fPhiEstimate = fPhic;
489
490 AliITStrackSA* trs = new AliITStrackSA();
491 fPoint1[0]=primaryVertex[0];
492 fPoint1[1]=primaryVertex[1];
493
494 fPoint2[0]=arr->GetX();
495 fPoint2[1]=arr->GetY();
cc088660 496 for(Int_t kk=0;kk<AliITSgeomTGeo::GetNLayers()-1;kk++)nn[kk] = 0;
7e5bf5af 497 nn[0] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],
498 trs,primaryVertex[2],pflag);
499 nn[1] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],
500 trs,primaryVertex[2],pflag);
501 if(nn[1]!=0){
502 pflag=1;
503 fPoint3[0]=fPointc[0];
504 fPoint3[1]=fPointc[1];
505 }
506 nn[2]= SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],
507 trs,primaryVertex[2],pflag);
508 if(nn[2]!=0){
509 pflag=1;
510 UpdatePoints();
511 }
512 nn[3]= SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],
513 trs,primaryVertex[2],pflag);
514 if(nn[3]!=0){
515 pflag=1;
516 UpdatePoints();
517 }
518 nn[4]=SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],
519 trs,primaryVertex[2],pflag);
520
521 Int_t fl=0;
cc088660 522 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-1;nnp++){
7e5bf5af 523 if(nn[nnp]!=0) fl+=1;
524 }
525 if(fl>=5){ // 5/6
526 AliITStrackV2* tr2 = FitTrack(trs,primaryVertex);
527 if(tr2==0){
528 continue;
529 }
530
531 AliESDtrack outtrack;
532 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
533 event->AddTrack(&outtrack);
534 ntrack++;
535
536 }
b8ed1a92 537
bef31448 538 delete trs;
539 }//end loop on clusters of layer2
7e5bf5af 540 }
541
bef31448 542 delete [] nn;
b8ed1a92 543 } //end opt="5/6"
544
545
546
547 // search for tracks starting from SPD2, SDD1, SDD2, SSD2
548 // for cosmics (A. Dainese 31.07.07)
549 if(fOuterStartLayer>0) {
550 for(Int_t innLay=1; innLay<=fOuterStartLayer; innLay++) {
551 printf("Searching from layer %d outward\n",innLay);
552 // counter for clusters on each layer
553 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-innLay];
554 for(Int_t nloop=0;nloop<fNloop;nloop++){
555 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
556 while(nclInnLay--){ //loop starting from layer innLay
557 ResetForFinding();
558 Int_t pflag=0;
559 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay);
560
561 if(!cl) continue;
562 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay);
563 fPhic = arr->GetPhi();
564 fLambdac = arr->GetLambda();
565 fPhiEstimate = fPhic;
566
567 AliITStrackSA* trs = new AliITStrackSA();
568 fPoint1[0]=primaryVertex[0];
569 fPoint1[1]=primaryVertex[1];
570 fPoint2[0]=arr->GetX();
571 fPoint2[1]=arr->GetY();
572
573 Int_t kk;
574 for(kk=0;kk<AliITSgeomTGeo::GetNLayers()-innLay;kk++) nn[kk] = 0;
575
576 kk=0;
577 nn[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
578 trs,primaryVertex[2],pflag);
579 for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) {
580 kk++;
581 nn[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
582 trs,primaryVertex[2],pflag);
583 if(nn[kk]!=0){
584 pflag=1;
585 if(kk==1) {
586 fPoint3[0]=fPointc[0];
587 fPoint3[1]=fPointc[1];
588 } else {
589 UpdatePoints();
590 }
591 }
592 }
593
594 Int_t fl=0;
595 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
596 if(nn[nnp]!=0) fl+=1;
597 }
598 if(fl>=AliITSgeomTGeo::GetNLayers()-innLay){
599 AliITStrackV2* tr2 = FitShortTrack(trs,primaryVertex,innLay);
600 if(tr2==0){
601 continue;
602 }
603
604 AliESDtrack outtrack;
605 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
606 event->AddTrack(&outtrack);
607 ntrack++;
608
609 }
610
611 delete trs;
612 }//end loop on clusters of innLay
613 } //end loop on window sizes
614
615 delete [] nn;
616 } //end loop on innLay
617 } //end if(fOuterStartLayer>0)
618
7e5bf5af 619
bef31448 620 delete [] firstmod;
bef31448 621 Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks());
2257f27e 622 return 0;
bef31448 623
624}
7e5bf5af 625
626
627
2257f27e 628
629
13918578 630//________________________________________________________________________
631
7e5bf5af 632AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex){
13918578 633 //fit of the found track
634
13918578 635
cc088660 636 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
637 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
638 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
13918578 639 }
15dd636f 640
13918578 641 Int_t nclusters = tr->GetNumberOfClustersSA();
cc088660 642 TObjArray** listlayer = new TObjArray*[AliITSgeomTGeo::GetNLayers()];
643 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
13918578 644 listlayer[i] = new TObjArray(0,0);
645 }
646
647 TArrayI clind0(20);
648 TArrayI clind1(20);
649 TArrayI clind2(20);
650 TArrayI clind3(20);
651 TArrayI clind4(20);
652 TArrayI clind5(20);
653
7e5bf5af 654 TArrayI mark0(20);
655 TArrayI mark1(20);
656 TArrayI mark2(20);
657 TArrayI mark3(20);
658 TArrayI mark4(20);
659 TArrayI mark5(20);
660
661
cc088660 662 Int_t * nnn = new Int_t[AliITSgeomTGeo::GetNLayers()];
663 Int_t * kkk = new Int_t[AliITSgeomTGeo::GetNLayers()];
664 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {nnn[i]=0;kkk[i]=0;}
13918578 665
666 for(Int_t ncl=0;ncl<nclusters;ncl++){
7e5bf5af 667 Int_t index = tr->GetClusterIndexSA(ncl);
00a7cc50 668 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
627b6db6 669 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
13918578 670 Int_t lay = (index & 0xf0000000) >> 28;
671 if(lay==0) { listlayer[0]->AddLast(cl); clind0[nnn[0]]=index;nnn[0]++;}
672 if(lay==1) { listlayer[1]->AddLast(cl); clind1[nnn[1]]=index;nnn[1]++;}
673 if(lay==2) { listlayer[2]->AddLast(cl); clind2[nnn[2]]=index;nnn[2]++;}
674 if(lay==3) { listlayer[3]->AddLast(cl); clind3[nnn[3]]=index;nnn[3]++;}
675 if(lay==4) { listlayer[4]->AddLast(cl); clind4[nnn[4]]=index;nnn[4]++;}
676 if(lay==5) { listlayer[5]->AddLast(cl); clind5[nnn[5]]=index;nnn[5]++;}
677 }
037efb75 678 delete [] nnn;
13918578 679
cc088660 680 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
7e5bf5af 681 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
682 Int_t mark = tr->GetClusterMark(nlay,ncl);
683 if(nlay==0) { mark0[kkk[0]]=mark;kkk[0]++;}
684 if(nlay==1) { mark1[kkk[1]]=mark;kkk[1]++;}
685 if(nlay==2) { mark2[kkk[2]]=mark;kkk[2]++;}
686 if(nlay==3) { mark3[kkk[3]]=mark;kkk[3]++;}
687 if(nlay==4) { mark4[kkk[4]]=mark;kkk[4]++;}
688 if(nlay==5) { mark5[kkk[5]]=mark;kkk[5]++;}
689
690 }
691 }
692
693 delete [] kkk;
694
13918578 695
cc088660 696 Int_t * end = new Int_t[AliITSgeomTGeo::GetNLayers()];
697 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
13918578 698 if(listlayer[i]->GetEntries()==0) end[i]=1;
699 else end[i]=listlayer[i]->GetEntries();
700 }
701
7e5bf5af 702 TClonesArray* listSA = new TClonesArray("AliITStrackSA");
703 TClonesArray &tri = *listSA;
704 Int_t nlist=0;
705
706 if(end[0]==0) end[0]=1; //for tracks with cluster on layer 0 missing
b8ed1a92 707 for(Int_t l1=0;l1<end[0];l1++){ //loop on layer 1
00a7cc50 708 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l1);
13918578 709 Double_t x1,y1,z1,sx1,sy1,sz1;
710 Double_t x2,y2,z2,sx2,sy2,sz2;
00a7cc50 711 AliITSRecPoint* p1=0;
712 AliITSRecPoint* p2=0;
bef31448 713 Int_t index1=clind0[l1];
714 Int_t index2=0;
7e5bf5af 715 Int_t mrk1 = mark0[l1];
716 Int_t mrk2 = 0;
717 Int_t lay1=0;
718 Int_t lay2=1;
719 Int_t module1=-1;
b8ed1a92 720 for(Int_t l2=0;l2<end[1];l2++){ //loop on layer 2
00a7cc50 721 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l2);
bef31448 722 index2=clind1[l2];
7e5bf5af 723 mrk2 = mark1[l2];
13918578 724 for(Int_t l3=0;l3<end[2];l3++){ //loop on layer 3
00a7cc50 725 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l3);
bef31448 726
727 if(cl0==0 && cl1!=0) {
bef31448 728 p1=cl1;
b8ed1a92 729 p2=cl2;
730 index1=clind1[l2];mrk1=mark1[l2];
731 index2=clind2[l3];mrk2=mark2[l3];
732 lay1=1;
733 lay2=2;
7e5bf5af 734 module1 = p1->GetDetectorIndex()+firstmod[1];
bef31448 735 }
736 if(cl0!=0 && cl1==0){
737 p1=cl0;
b8ed1a92 738 p2=cl2;index2=clind2[l3];mrk2=mark2[l3];
739 lay1=0;
740 lay2=2;
7e5bf5af 741 module1 = p1->GetDetectorIndex()+firstmod[0];
bef31448 742 }
743 if(cl0!=0 && cl1!=0){
744 p1=cl0;
745 p2=cl1;
b8ed1a92 746 lay1=0;
747 lay2=1;
7e5bf5af 748 module1 = p1->GetDetectorIndex()+firstmod[0];
bef31448 749 }
7e5bf5af 750
751 Int_t cln1=mrk1;
752 Int_t cln2=mrk2;
b8ed1a92 753 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(lay1,cln1);
754 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(lay2,cln2);
755 x1 = arr1->GetX();
756 x2 = arr2->GetX();
757 y1 = arr1->GetY();
758 y2 = arr2->GetY();
759 z1 = arr1->GetZ();
760 z2 = arr2->GetZ();
761 sx1 = arr1->GetSx();
762 sx2 = arr2->GetSx();
763 sy1 = arr1->GetSy();
764 sy2 = arr2->GetSy();
765 sz1 = arr1->GetSz();
766 sz2 = arr2->GetSz();
7e5bf5af 767
13918578 768 Int_t layer,ladder,detector;
cc088660 769 AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
bef31448 770 Float_t yclu1 = p1->GetY();
771 Float_t zclu1 = p1->GetZ();
b8ed1a92 772 Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
7e5bf5af 773 Double_t tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
774 Double_t phi2 = TMath::ATan2((y2-y1),(x2-x1));
775
bef31448 776 for(Int_t l4=0;l4<end[3];l4++){ //loop on layer 4
00a7cc50 777 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3]->At(l4);
bef31448 778 for(Int_t l5=0;l5<end[4];l5++){ //loop on layer 5
00a7cc50 779 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l5);
bef31448 780 for(Int_t l6=0;l6<end[5];l6++){ //loop on layer 6
00a7cc50 781 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l6);
cc088660 782 AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
bef31448 783
7e5bf5af 784 if(cl5!=0) {
785 trac->AddClusterV2(5,(clind5[l6] & 0x0fffffff)>>0);
786 trac->AddClusterMark(5,mark5[l6]);
787 }
788 if(cl4!=0){
789 trac->AddClusterV2(4,(clind4[l5] & 0x0fffffff)>>0);
790 trac->AddClusterMark(4,mark4[l5]);
791 }
792 if(cl3!=0){
793 trac->AddClusterV2(3,(clind3[l4] & 0x0fffffff)>>0);
794 trac->AddClusterMark(3,mark3[l4]);
795 }
796 if(cl2!=0){
797 trac->AddClusterV2(2,(clind2[l3] & 0x0fffffff)>>0);
798 trac->AddClusterMark(2,mark2[l3]);
799 }
800 if(cl1!=0){
801 trac->AddClusterV2(1,(clind1[l2] & 0x0fffffff)>>0);
802 trac->AddClusterMark(1,mark1[l2]);
803 }
804 if(cl0!=0){
805 trac->AddClusterV2(0,(clind0[l1] & 0x0fffffff)>>0);
806 trac->AddClusterMark(0,mark0[l1]);
807 }
e43c066c 808 //fit with Kalman filter using AliITStrackerMI::RefitAt()
bef31448 809
7e5bf5af 810
15dd636f 811 AliITStrackMI* ot = new AliITStrackSA(*trac);
bef31448 812
6c94f330 813 ot->ResetCovariance(10.);
bef31448 814 ot->ResetClusters();
815
b8ed1a92 816 if(RefitAt(krInsideITSscreen,ot,trac)){ //fit from layer 1 to layer 6
15dd636f 817 AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
6c94f330 818 otrack2->ResetCovariance(10.);
bef31448 819 otrack2->ResetClusters();
820 //fit from layer 6 to layer 1
b8ed1a92 821 if(RefitAt(krInsideSPD1,otrack2,ot)) {
73f446a0 822 fListOfTracks->AddLast(otrack2);
7e5bf5af 823 new (tri[nlist]) AliITStrackSA(*trac);
824 nlist++;
73f446a0 825 } else {
826 delete otrack2;
827 }
bef31448 828
829 }
830
831 delete ot;
832 delete trac;
833 }//end loop layer 6
834 }//end loop layer 5
b8ed1a92 835 }//end loop layer 4
13918578 836 }//end loop layer 3
bef31448 837 }//end loop layer 2
13918578 838 }//end loop layer 1
839
037efb75 840 delete [] end;
841
7e5bf5af 842
843
4e05ab9a 844 Int_t dim=fListOfTracks->GetEntries();
13918578 845 if(dim==0){
cc088660 846 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
13918578 847 delete listlayer[i];
848 }
c09cece6 849 delete [] listlayer;
00a7cc50 850 listSA->Delete();
851 delete listSA;
73f446a0 852 delete [] firstmod;
13918578 853 return 0;
854 }
855
7e5bf5af 856 Int_t lowchi2 = FindTrackLowChiSquare(fListOfTracks,dim);
857 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
858 AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2);
859
73f446a0 860 if(otrack==0) {
cc088660 861 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
73f446a0 862 delete listlayer[i];
863 }
c09cece6 864 delete [] listlayer;
00a7cc50 865 listSA->Delete();
866 delete listSA;
73f446a0 867 delete [] firstmod;
868 return 0;
869 }
cc088660 870 Int_t * indexc = new Int_t[AliITSgeomTGeo::GetNLayers()];
871 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
13918578 872 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
873 indexc[nind] = otrack->GetClusterIndex(nind);
874 }
00a7cc50 875 AliITSRecPoint* cl0 = (AliITSRecPoint*)GetCluster(indexc[0]);
876 AliITSRecPoint* cl1 = (AliITSRecPoint*)GetCluster(indexc[1]);
877 AliITSRecPoint* cl2 = (AliITSRecPoint*)GetCluster(indexc[2]);
878 AliITSRecPoint* cl3 = (AliITSRecPoint*)GetCluster(indexc[3]);
879 AliITSRecPoint* cl4 = (AliITSRecPoint*)GetCluster(indexc[4]);
13918578 880 Int_t labl[3]={-1,-1,-1};
cc088660 881 if(otrack->GetNumberOfClusters()==AliITSgeomTGeo::GetNLayers()){
00a7cc50 882 AliITSRecPoint* cl5 = (AliITSRecPoint*)GetCluster(indexc[5]);
13918578 883 labl[0]=cl5->GetLabel(0);
884 labl[1]=cl5->GetLabel(1);
885 labl[2]=cl5->GetLabel(2);
886 }
037efb75 887 delete [] indexc;
cc088660 888 if(otrack->GetNumberOfClusters()==(AliITSgeomTGeo::GetNLayers()-1)){
13918578 889 labl[0]=-1;
890 labl[1]=-1;
891 labl[2]=-1;
892 }
893 Int_t numberofpoints;
2257f27e 894 if(fSixPoints) numberofpoints=6;
13918578 895 else numberofpoints=5;
e43c066c 896 CookLabel(otrack,0.); //MI change - to see fake ratio
13918578 897 Int_t label = Label(cl0->GetLabel(0),cl1->GetLabel(0),
bef31448 898 cl2->GetLabel(0),cl3->GetLabel(0),
899 cl4->GetLabel(0),labl[0],
900 cl0->GetLabel(1),cl1->GetLabel(1),
901 cl2->GetLabel(1),cl3->GetLabel(1),
902 cl4->GetLabel(1),labl[1],
903 cl0->GetLabel(2),cl1->GetLabel(2),
904 cl2->GetLabel(2),cl3->GetLabel(2),
905 cl4->GetLabel(2),labl[2],numberofpoints);
13918578 906
907 otrack->SetLabel(label);
7e5bf5af 908 //remove clusters of found track
909
cc088660 910 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
7e5bf5af 911 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
912 Int_t index = trsa->GetClusterMark(nlay,cln);
913 fCluLayer[nlay]->RemoveAt(index);
914 RemoveClusterCoord(nlay,index);
915 fCluLayer[nlay]->Compress();
b8ed1a92 916 }
917 }
918 listSA->Delete();
919 delete listSA;
920
921 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
922 delete listlayer[i];
923 }
924 delete [] listlayer;
925 delete [] firstmod;
926 return otrack;
927
928}
929
930//________________________________________________________________________
931
932AliITStrackV2* AliITStrackerSA::FitShortTrack(AliITStrackSA* tr,Double_t *primaryVertex,Int_t innLay){
933 //fit of the found track (short tracks, <6 points, for cosmics). A.Dainese 31.07.07
934
935
936 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
937 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
938 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
939 }
940
941 Int_t nclusters = tr->GetNumberOfClustersSA();
942 TObjArray** listlayer = new TObjArray*[AliITSgeomTGeo::GetNLayers()];
943 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
944 listlayer[i] = new TObjArray(0,0);
945 }
946
947 TArrayI clind0(20);
948 TArrayI clind1(20);
949 TArrayI clind2(20);
950 TArrayI clind3(20);
951 TArrayI clind4(20);
952 TArrayI clind5(20);
953
954 TArrayI mark0(20);
955 TArrayI mark1(20);
956 TArrayI mark2(20);
957 TArrayI mark3(20);
958 TArrayI mark4(20);
959 TArrayI mark5(20);
960
961
962 Int_t * nnn = new Int_t[AliITSgeomTGeo::GetNLayers()];
963 Int_t * kkk = new Int_t[AliITSgeomTGeo::GetNLayers()];
964 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {nnn[i]=0;kkk[i]=0;}
965
966 for(Int_t ncl=0;ncl<nclusters;ncl++){
967 Int_t index = tr->GetClusterIndexSA(ncl);
968 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
969 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
970 Int_t lay = (index & 0xf0000000) >> 28;
971 if(lay==0) { listlayer[0]->AddLast(cl); clind0[nnn[0]]=index;nnn[0]++;}
972 if(lay==1) { listlayer[1]->AddLast(cl); clind1[nnn[1]]=index;nnn[1]++;}
973 if(lay==2) { listlayer[2]->AddLast(cl); clind2[nnn[2]]=index;nnn[2]++;}
974 if(lay==3) { listlayer[3]->AddLast(cl); clind3[nnn[3]]=index;nnn[3]++;}
975 if(lay==4) { listlayer[4]->AddLast(cl); clind4[nnn[4]]=index;nnn[4]++;}
976 if(lay==5) { listlayer[5]->AddLast(cl); clind5[nnn[5]]=index;nnn[5]++;}
977 }
978 delete [] nnn;
979
980 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
981 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
982 Int_t mark = tr->GetClusterMark(nlay,ncl);
983 if(nlay==0) { mark0[kkk[0]]=mark;kkk[0]++;}
984 if(nlay==1) { mark1[kkk[1]]=mark;kkk[1]++;}
985 if(nlay==2) { mark2[kkk[2]]=mark;kkk[2]++;}
986 if(nlay==3) { mark3[kkk[3]]=mark;kkk[3]++;}
987 if(nlay==4) { mark4[kkk[4]]=mark;kkk[4]++;}
988 if(nlay==5) { mark5[kkk[5]]=mark;kkk[5]++;}
989
990 }
991 }
992
993 delete [] kkk;
994
995
996 Int_t * end = new Int_t[AliITSgeomTGeo::GetNLayers()];
997 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
998 if(listlayer[i]->GetEntries()==0) end[i]=1;
999 else end[i]=listlayer[i]->GetEntries();
1000 }
1001
1002 TClonesArray* listSA = new TClonesArray("AliITStrackSA");
1003 TClonesArray &tri = *listSA;
1004 Int_t nlist=0;
1005
1006 // if(end[0]==0) end[0]=1; //for tracks with cluster on layer 0 missing
1007 for(Int_t l1=0;l1<end[0];l1++){ //loop on layer 1
1008 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l1);
1009 for(Int_t l2=0;l2<end[1];l2++){ //loop on layer 2
1010 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l2);
1011 for(Int_t l3=0;l3<end[2];l3++){ //loop on layer 3
1012 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l3);
1013 for(Int_t l4=0;l4<end[3];l4++){ //loop on layer 4
1014 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3]->At(l4);
1015 for(Int_t l5=0;l5<end[4];l5++){ //loop on layer 5
1016 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l5);
1017 for(Int_t l6=0;l6<end[5];l6++){ //loop on layer 6
1018 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l6);
1019
1020
1021 Double_t x1,y1,z1,sx1,sy1,sz1;
1022 Double_t x2,y2,z2,sx2,sy2,sz2;
1023 AliITSRecPoint* p1=0;
1024 AliITSRecPoint* p2=0;
1025 Int_t index1=0,index2=0;
1026 Int_t mrk1=0,mrk2=0;
1027 if(innLay==1) {
1028 p1=cl1;
1029 p2=cl2;
1030 index1=clind1[l2];mrk1=mark1[l2];
1031 index2=clind2[l3];mrk2=mark2[l3];
1032 } else if(innLay==2) {
1033 p1=cl2;
1034 p2=cl3;
1035 index1=clind2[l3];mrk1=mark2[l3];
1036 index2=clind3[l4];mrk2=mark3[l4];
1037 } else if(innLay==3) {
1038 p1=cl3;
1039 p2=cl4;
1040 index1=clind3[l4];mrk1=mark3[l4];
1041 index2=clind4[l5];mrk2=mark4[l5];
1042 } else if(innLay==4) {
1043 p1=cl4;
1044 p2=cl5;
1045 index1=clind4[l5];mrk1=mark4[l5];
1046 index2=clind5[l6];mrk2=mark5[l6];
1047 }
1048 Int_t lay1=innLay;
1049 Int_t lay2=innLay+1;
1050 Int_t module1 = p1->GetDetectorIndex()+firstmod[innLay];
1051
1052 Int_t cln1=mrk1;
1053 Int_t cln2=mrk2;
1054 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(lay1,cln1);
1055 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(lay2,cln2);
1056 x1 = arr1->GetX();
1057 x2 = arr2->GetX();
1058 y1 = arr1->GetY();
1059 y2 = arr2->GetY();
1060 z1 = arr1->GetZ();
1061 z2 = arr2->GetZ();
1062 sx1 = arr1->GetSx();
1063 sx2 = arr2->GetSx();
1064 sy1 = arr1->GetSy();
1065 sy2 = arr2->GetSy();
1066 sz1 = arr1->GetSz();
1067 sz2 = arr2->GetSz();
1068
1069 Int_t layer,ladder,detector;
1070 AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
1071 Float_t yclu1 = p1->GetY();
1072 Float_t zclu1 = p1->GetZ();
1073 Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
1074 Double_t tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
1075 Double_t phi2 = TMath::ATan2((y2-y1),(x2-x1));
1076 //printf("phi2: %f tgl2: %f\n",phi2,tgl2);
1077 AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
1078
1079 //Float_t clxyz[3];
1080 if(cl5!=0) {
1081 trac->AddClusterV2(5,(clind5[l6] & 0x0fffffff)>>0);
1082 trac->AddClusterMark(5,mark5[l6]);
1083 //cl5->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);
1084 }
1085 if(cl4!=0){
1086 trac->AddClusterV2(4,(clind4[l5] & 0x0fffffff)>>0);
1087 trac->AddClusterMark(4,mark4[l5]);
1088 //cl4->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);
1089 }
1090 if(cl3!=0){
1091 trac->AddClusterV2(3,(clind3[l4] & 0x0fffffff)>>0);
1092 trac->AddClusterMark(3,mark3[l4]);
1093 //cl3->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);
1094 }
1095 if(cl2!=0){
1096 trac->AddClusterV2(2,(clind2[l3] & 0x0fffffff)>>0);
1097 trac->AddClusterMark(2,mark2[l3]);
1098 //cl2->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);
1099 }
1100 if(cl1!=0){
1101 trac->AddClusterV2(1,(clind1[l2] & 0x0fffffff)>>0);
1102 trac->AddClusterMark(1,mark1[l2]);
1103 //cl1->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);
1104 }
1105 if(cl0!=0){
1106 trac->AddClusterV2(0,(clind0[l1] & 0x0fffffff)>>0);
1107 trac->AddClusterMark(0,mark0[l1]);
1108 //cl0->GetGlobalXYZ(clxyz);printf("gcl %f %f %f\n",clxyz[0],clxyz[1],clxyz[2]);
1109 }
1110
1111
1112 //fit with Kalman filter using AliITStrackerMI::RefitAt()
1113 AliITStrackMI* ot = new AliITStrackSA(*trac);
1114
1115 ot->ResetCovariance(10.);
1116 ot->ResetClusters();
1117
1118 //printf("%d \n",trac->GetNumberOfClusters());for(Int_t ijk=0;ijk<trac->GetNumberOfClusters();ijk++) printf(" %d",trac->GetClusterIndex(ijk)); printf("\n");
1119 if(RefitAt(krInsideITSscreen,ot,trac)){ //fit from layer 1 to layer 6
1120 AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
1121 otrack2->ResetCovariance(10.);
1122 otrack2->ResetClusters();
1123 //fit from layer 6 to layer 1
1124 if(RefitAt(krInsideSPD1,otrack2,ot)) {
1125 fListOfTracks->AddLast(otrack2);
1126 new (tri[nlist]) AliITStrackSA(*trac);
1127 nlist++;
1128 } else {
1129 delete otrack2;
1130 }
1131
1132 }
1133
1134 delete ot;
1135 delete trac;
1136 }//end loop layer 6
1137 }//end loop layer 5
1138 }//end loop layer 4
1139 }//end loop layer 3
1140 }//end loop layer 2
1141 }//end loop layer 1
1142
1143 delete [] end;
1144
1145
1146
1147 Int_t dim=fListOfTracks->GetEntries();
1148 if(dim==0){
1149 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
1150 delete listlayer[i];
1151 }
1152 delete [] listlayer;
1153 listSA->Delete();
1154 delete listSA;
1155 delete [] firstmod;
1156 return 0;
1157 }
1158
1159 Int_t lowchi2 = FindTrackLowChiSquare(fListOfTracks,dim);
1160 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
1161 AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2);
1162
1163 if(otrack==0) {
1164 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
1165 delete listlayer[i];
1166 }
1167 delete [] listlayer;
1168 listSA->Delete();
1169 delete listSA;
1170 delete [] firstmod;
1171 return 0;
1172 }
1173 Int_t * indexc = new Int_t[AliITSgeomTGeo::GetNLayers()];
1174 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
1175 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
1176 indexc[nind] = otrack->GetClusterIndex(nind);
1177 }
1178 Int_t labl[6][3];
1179 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
1180 if(i<otrack->GetNumberOfClusters()) {
1181 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc[i]);
1182 labl[i][0]=cl->GetLabel(0);
1183 labl[i][1]=cl->GetLabel(1);
1184 labl[i][2]=cl->GetLabel(2);
1185 } else {
1186 labl[i][0]=-1;
1187 labl[i][1]=-1;
1188 labl[i][2]=-1;
1189 }
1190 }
1191 delete [] indexc;
1192 Int_t numberofpoints=AliITSgeomTGeo::GetNLayers()-innLay;
1193 CookLabel(otrack,0.); //MI change - to see fake ratio
1194
1195 Int_t label=FindLabel(labl[0][0],labl[1][0],labl[2][0],labl[3][0],labl[4][0],labl[5][0]);
1196 Int_t lflag=0;
1197 for(Int_t i=0;i<numberofpoints;i++)
1198 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
1199
1200 if(lflag<numberofpoints) label = -label;
1201 otrack->SetLabel(label);
1202
1203 //remove clusters of found track
1204 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
1205 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
1206 Int_t index = trsa->GetClusterMark(nlay,cln);
1207 fCluLayer[nlay]->RemoveAt(index);
1208 RemoveClusterCoord(nlay,index);
1209 fCluLayer[nlay]->Compress();
7e5bf5af 1210 }
1211 }
1212 listSA->Delete();
1213 delete listSA;
1214
cc088660 1215 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
13918578 1216 delete listlayer[i];
1217 }
c09cece6 1218 delete [] listlayer;
037efb75 1219 delete [] firstmod;
13918578 1220 return otrack;
1221
1222}
1223
bef31448 1224
4e05ab9a 1225
bef31448 1226//_______________________________________________________
7e5bf5af 1227Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){
13918578 1228 //function used to to find the clusters associated to the track
1229 Int_t nc=0;
1230 AliITSlayer &lay = fgLayers[layer];
7e5bf5af 1231 Double_t r=lay.GetR();
1232 if(pflag==1){
cfe729e0 1233 Float_t cx1,cx2,cy1,cy2;
1234 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
1235 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
1236 return 0;
1966f03c 1237 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
1238 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
cfe729e0 1239 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
1240 }
13918578 1241
7e5bf5af 1242
1243 Int_t ncl = fCluLayer[layer]->GetEntries();
1244 for (Int_t index=0; index<ncl; index++) {
00a7cc50 1245 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
7e5bf5af 1246 if (!c) continue;
1247 if (c->GetQ()<=0) continue;
1248
1249 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
1250 Double_t phi = arr->GetPhi();
cfe729e0 1251 if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue;
494fda7c 1252
7e5bf5af 1253 Double_t lambda = arr->GetLambda();
cfe729e0 1254 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
1255
7e5bf5af 1256 if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0;
1257 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
1258 Int_t orind = arr->GetOrInd();
1259 trs->AddClusterSA(layer,orind);
1260 trs->AddClusterMark(layer,index);
1261
cfe729e0 1262 nc++;
1263 fLambdac=lambda;
1264 fPhiEstimate=phi;
cfe729e0 1265
7e5bf5af 1266 fPointc[0]=arr->GetX();
1267 fPointc[1]=arr->GetY();
1268
cfe729e0 1269 }
1270 return nc;
1271}
13918578 1272
bef31448 1273//________________________________________________________________
1274void AliITStrackerSA::UpdatePoints(){
1275 //update of points for the estimation of the curvature
13918578 1276
bef31448 1277 fPoint2[0]=fPoint3[0];
1278 fPoint2[1]=fPoint3[1];
1279 fPoint3[0]=fPointc[0];
1280 fPoint3[1]=fPointc[1];
13918578 1281
1282
13918578 1283}
13918578 1284
13918578 1285//___________________________________________________________________
1286Int_t AliITStrackerSA::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){
1287
1288 //given (x,y) of three recpoints (in global coordinates)
1289 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
1290
1291 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1292 if(den==0) return 0;
1293 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1294 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1295 c = -x1*x1-y1*y1-a*x1-b*y1;
1296 return 1;
1297 }
1298//__________________________________________________________________________
1299 Int_t AliITStrackerSA::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){
1300
1301 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
1302 //c2 is -rlayer*rlayer
1303
1304 if(a1==0) return 0;
3a2f227d 1305 Double_t m = c2-c1;
1306 Double_t aA = (b1*b1)/(a1*a1)+1;
1307 Double_t bB = (-2*m*b1/(a1*a1));
1308 Double_t cC = c2+(m*m)/(a1*a1);
1309 Double_t dD = bB*bB-4*aA*cC;
1310 if(dD<0) return 0;
13918578 1311
3a2f227d 1312 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
1313 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
13918578 1314 x1 = (c2-c1-b1*y1)/a1;
1315 x2 = (c2-c1-b1*y2)/a1;
1316
1317 return 1;
1318}
1319//____________________________________________________________________
1320Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t
1321x2,Double_t y2,Double_t x3,Double_t y3){
1322
1323 //calculates the curvature of track
1324 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1325 if(den==0) return 0;
1326 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1327 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1328 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
1329 Double_t xc=-a/2.;
1330
1331 if((a*a+b*b-4*c)<0) return 0;
1332 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
1333 if(rad==0) return 0;
1334
1335 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
1336 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
1337 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
1338 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
1339
1340 return 1/rad;
1341
1342}
7e5bf5af 1343
1344
13918578 1345//____________________________________________________________________
1346Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
1347
1348 //Returns the point closest to pp
1349
1350 Double_t diff1 = p1-pp;
1351 Double_t diff2 = p2-pp;
1352
1353 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
1354 else fPhiEstimate=p2;
1355 return fPhiEstimate;
1356
1357}
1358
1359
1360//_________________________________________________________________
7e5bf5af 1361Int_t AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const {
52a9777e 1362 // returns track with lowers chi square
13918578 1363 if(dim==1){
7e5bf5af 1364 //AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(0);
1365 //return trk;
1366 return 0;
13918578 1367 }
52a9777e 1368 if(dim==0) return 0;
037efb75 1369 Double_t * chi2 = new Double_t[dim];
1370 Int_t * index = new Int_t[dim];
13918578 1371 for(Int_t i=0;i<dim;i++){
1372 AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(i);
1373 chi2[i]=trk->GetChi2();
1374 index[i]=i;
1375 }
1376
1377 Int_t w=0;Double_t value;
1378 Int_t lp;
1379 while(w<dim){
1380 for(Int_t j=w+1;j<dim;j++){
1381 if(chi2[w]<chi2[j]){
bef31448 1382 value=chi2[w];
1383 chi2[w]=chi2[j];
1384 chi2[j]=value;
1385 lp=index[w];
1386 index[w]=index[j];
1387 index[j]=lp;
13918578 1388 }
1389 }
1390 w++;
1391 }
52a9777e 1392 Int_t tmp = index[dim-1];
037efb75 1393 delete [] chi2;
1394 delete [] index;
52a9777e 1395 return tmp;
13918578 1396}
1397
1398//__________________________________________________________
1399Int_t AliITStrackerSA::FindLabel(Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5, Int_t l6){
1400
1401 //function used to determine the track label
1402
1403 Int_t lb[6] = {l1,l2,l3,l4,l5,l6};
1404 Int_t aa[6]={1,1,1,1,1,1};
1405 Int_t ff=0;
1406 Int_t ll=0;
1407 Int_t k=0;Int_t w=0;Int_t num=6;
8b3779ef 1408 for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i;
13918578 1409
1410 while(k<num){
1411
1412 for(Int_t i=k+1;i<num;i++){
1413
1414 if(lb[k]==lb[i] && aa[k]!=0){
1415
1416 aa[k]+=1;
1417 aa[i]=0;
1418 }
1419 }
8b3779ef 1420 k++;
13918578 1421 }
1422
1423 while(w<num){
8b3779ef 1424
13918578 1425 for(Int_t j=0;j<6;j++){
1426 if(aa[w]<aa[j]){
1427 ff=aa[w];
1428 aa[w]=aa[j];
1429 aa[j]=ff;
1430 ll=lb[w];
1431 lb[w]=lb[j];
1432 lb[j]=ll;
1433 }
1434 }
8b3779ef 1435 w++;
13918578 1436 }
8b3779ef 1437
1438 if(num<1) return -1;
1439 return lb[num-1];
13918578 1440}
1441
1442//_____________________________________________________________________________
1443Int_t AliITStrackerSA::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,
1444Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t numberofpoints){
1445
1446
1447 //function used to assign label to the found track. If track is fake, the label is negative
1448
1449 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1450 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1451 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1452 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1453 Int_t lflag=0;Int_t num=6;
1454 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1455
1456 for(Int_t i=0;i<num;i++){
1457 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1458 }
1459
1460 if(lflag>=numberofpoints) return ll;
1461 else return -ll;
1462
1463
1464}
1465
1466//_____________________________________________________________________________
1467void AliITStrackerSA::SetWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1468 // Set sizes of the phi and lambda windows used for track finding
1469 fNloop = n;
1470 if(phi){ // user defined values
1471 fPhiWin = new Double_t[fNloop];
1472 fLambdaWin = new Double_t[fNloop];
1473 for(Int_t k=0;k<fNloop;k++){
1474 fPhiWin[k]=phi[k];
1475 fLambdaWin[k]=lam[k];
1476 }
1477 }
1478 else { // default values
627b6db6 1479
1480 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
bef31448 1481 0.005,0.0053,0.0055,
1482 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1483 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
627b6db6 1484 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1485 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1486 0.005,0.005,0.006,
1487 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1488 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1489 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
bef31448 1490
627b6db6 1491 if(fNloop!=33){
1492 fNloop = 33;
13918578 1493 }
627b6db6 1494
1495
13918578 1496 fPhiWin = new Double_t[fNloop];
1497 fLambdaWin = new Double_t[fNloop];
1498
1499 for(Int_t k=0;k<fNloop;k++){
1500 fPhiWin[k]=phid[k];
1501 fLambdaWin[k]=lambdad[k];
1502 }
1503
1504 }
1505
1506}
7e5bf5af 1507//_______________________________________________________________________
cc088660 1508void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){
7e5bf5af 1509 //Returns values of phi (azimuthal) and lambda angles for a given cluster
cc088660 1510/*
7e5bf5af 1511 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1512 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1513 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1514
1515 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1516 Double_t phi1=TMath::Pi()/2+alpha;
1517 if (lay==1) phi1+=TMath::Pi();
1518
1519 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1520 Float_t r=tx*cp+ty*sp;
1521
cc088660 1522 xyz= r*cp - cl->GetY()*sp;
7e5bf5af 1523 y= r*sp + cl->GetY()*cp;
1524 z=cl->GetZ();
cc088660 1525*/
1526 Float_t xyz[3];
1527 cl->GetGlobalXYZ(xyz);
1528 x=xyz[0];
1529 y=xyz[1];
1530 z=xyz[2];
1531
1966f03c 1532 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
7e5bf5af 1533 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1534}
13918578 1535
7e5bf5af 1536//________________________________________________________________________
cc088660 1537void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
7e5bf5af 1538
cc088660 1539 //returns sigmax, y, z of cluster in global coordinates
1540/*
7e5bf5af 1541 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
cc088660 1542 Int_t lay,lad,det;
1543 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
7e5bf5af 1544
1545 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1546 Double_t phi=TMath::Pi()/2+alpha;
1547 if (lay==1) phi+=TMath::Pi();
1548
1549 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
cc088660 1550*/
1551 Float_t covm[6];
1552 cl->GetGlobalCov(covm);
1553 sx=TMath::Sqrt(covm[0]);
1554 sy=TMath::Sqrt(covm[3]);
1555 sz=TMath::Sqrt(covm[5]);
1556/*
7e5bf5af 1557 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1558 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1559 sz = TMath::Sqrt(cl->GetSigmaZ2());
cc088660 1560*/
7e5bf5af 1561}
cc088660 1562