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Updated error definitions.
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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"
e340bb86 41#include "AliITSReconstructor.h"
bf6adc12 42#include "AliRun.h"
13918578 43
44ClassImp(AliITStrackerSA)
45
46//____________________________________________________________________________
e399f961 47AliITStrackerSA::AliITStrackerSA():AliITStrackerMI(),
48fPhiEstimate(0),
1966f03c 49fITSStandAlone(0),
e399f961 50fLambdac(0),
51fPhic(0),
52fCoef1(0),
53fCoef2(0),
54fCoef3(0),
55fNloop(0),
56fPhiWin(0),
57fLambdaWin(0),
58fVert(0),
59fVertexer(0),
e399f961 60fListOfTracks(0),
61fITSclusters(0),
62fSixPoints(0),
b8ed1a92 63fOuterStartLayer(0),
e399f961 64fCluLayer(0),
65fCluCoord(0){
13918578 66 // Default constructor
67 Init();
627b6db6 68
13918578 69}
2257f27e 70//____________________________________________________________________________
cc088660 71AliITStrackerSA::AliITStrackerSA(const Char_t *geom):AliITStrackerMI(0),
e399f961 72fPhiEstimate(0),
1966f03c 73fITSStandAlone(0),
e399f961 74fLambdac(0),
75fPhic(0),
76fCoef1(0),
77fCoef2(0),
78fCoef3(0),
79fNloop(0),
80fPhiWin(0),
81fLambdaWin(0),
82fVert(0),
83fVertexer(0),
e399f961 84fListOfTracks(0),
85fITSclusters(0),
86fSixPoints(0),
b8ed1a92 87fOuterStartLayer(0),
e399f961 88fCluLayer(0),
89fCluCoord(0)
2257f27e 90{
91 // Standard constructor (Vertex is known and passed to this obj.)
cc088660 92 if (geom) {
93 AliWarning("\"geom\" is actually a dummy argument !");
94 }
95
2257f27e 96 Init();
97 fVert = 0;
627b6db6 98
2257f27e 99}
100
13918578 101//____________________________________________________________________________
cc088660 102AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliESDVertex *vert):AliITStrackerMI(0),
e399f961 103fPhiEstimate(0),
1966f03c 104fITSStandAlone(0),
e399f961 105fLambdac(0),
106fPhic(0),
107fCoef1(0),
108fCoef2(0),
109fCoef3(0),
110fNloop(0),
111fPhiWin(0),
112fLambdaWin(0),
113fVert(vert),
114fVertexer(0),
e399f961 115fListOfTracks(0),
116fITSclusters(0),
117fSixPoints(0),
b8ed1a92 118fOuterStartLayer(0),
e399f961 119fCluLayer(0),
1966f03c 120fCluCoord(0)
13918578 121{
122 // Standard constructor (Vertex is known and passed to this obj.)
cc088660 123 if (geom) {
124 AliWarning("\"geom\" is actually a dummy argument !");
125 }
13918578 126 Init();
627b6db6 127
13918578 128}
129
13918578 130//____________________________________________________________________________
cc088660 131AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliITSVertexer *vertexer):AliITStrackerMI(0),
e399f961 132fPhiEstimate(0),
1966f03c 133fITSStandAlone(0),
e399f961 134fLambdac(0),
135fPhic(0),
136fCoef1(0),
137fCoef2(0),
138fCoef3(0),
139fNloop(0),
140fPhiWin(0),
141fLambdaWin(0),
142fVert(),
143fVertexer(vertexer),
e399f961 144fListOfTracks(0),
145fITSclusters(0),
146fSixPoints(0),
b8ed1a92 147fOuterStartLayer(0),
e399f961 148fCluLayer(0),
1966f03c 149fCluCoord(0)
13918578 150{
151 // Standard constructor (Vertex is unknown - vertexer is passed to this obj)
cc088660 152 if (geom) {
153 AliWarning("\"geom\" is actually a dummy argument !");
154 }
13918578 155 Init();
156 fVertexer = vertexer;
627b6db6 157
13918578 158}
159
160//____________________________________________________________________________
e399f961 161AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(),
162fPhiEstimate(tracker.fPhiEstimate),
1966f03c 163fITSStandAlone(tracker.fITSStandAlone),
e399f961 164fLambdac(tracker.fLambdac),
165fPhic(tracker.fPhic),
166fCoef1(tracker.fCoef1),
167fCoef2(tracker.fCoef2),
168fCoef3(tracker.fCoef3),
169fNloop(tracker.fNloop),
170fPhiWin(tracker.fPhiWin),
171fLambdaWin(tracker.fLambdaWin),
172fVert(tracker.fVert),
173fVertexer(tracker.fVertexer),
e399f961 174fListOfTracks(tracker.fListOfTracks),
175fITSclusters(tracker.fITSclusters),
176fSixPoints(tracker.fSixPoints),
b8ed1a92 177fOuterStartLayer(tracker.fOuterStartLayer),
e399f961 178fCluLayer(tracker.fCluLayer),
179fCluCoord(tracker.fCluCoord) {
13918578 180 // Copy constructor
13918578 181 for(Int_t i=0;i<2;i++){
182 fPoint1[i]=tracker.fPoint1[i];
183 fPoint2[i]=tracker.fPoint2[i];
184 fPoint3[i]=tracker.fPoint3[i];
185 fPointc[i]=tracker.fPointc[i];
186 }
13918578 187 if(tracker.fVertexer && tracker.fVert){
d681bb2d 188 fVert = new AliESDVertex(*tracker.fVert);
13918578 189 }
190 else {
191 fVert = tracker.fVert;
192 }
cc088660 193 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 194 fCluLayer[i] = tracker.fCluLayer[i];
195 fCluCoord[i] = tracker.fCluCoord[i];
196 }
13918578 197}
7d62fb64 198//______________________________________________________________________
e399f961 199AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& source){
200 // Assignment operator.
201 this->~AliITStrackerSA();
202 new(this) AliITStrackerSA(source);
203 return *this;
204
7d62fb64 205}
13918578 206
207//____________________________________________________________________________
208AliITStrackerSA::~AliITStrackerSA(){
209 // destructor
d681bb2d 210 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
13918578 211 // and is deleted here
212 if(fVertexer){
213 if(fVert)delete fVert;
214 }
215 fVert = 0;
216 fVertexer = 0;
7e5bf5af 217
13918578 218 if(fPhiWin)delete []fPhiWin;
219 if(fLambdaWin)delete []fLambdaWin;
4e05ab9a 220 fListOfTracks->Delete();
adda6c2b 221 delete fListOfTracks;
7e5bf5af 222 if(fCluLayer){
cc088660 223 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 224 if(fCluLayer[i]){
225 fCluLayer[i]->Delete();
226 delete fCluLayer[i];
227 }
228 }
229 delete [] fCluLayer;
230 }
231 if(fCluCoord){
cc088660 232 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 233 if(fCluCoord[i]){
234 fCluCoord[i]->Delete();
235 delete fCluCoord[i];
236 }
237 }
238 delete [] fCluCoord;
627b6db6 239 }
7e5bf5af 240
7e5bf5af 241}
13918578 242
1966f03c 243//____________________________________________________________________________
af885e0f 244Int_t AliITStrackerSA::Clusters2Tracks(AliESDEvent *event){
1966f03c 245// This method is used to find and fit the tracks. By default the corresponding
246// method in the parent class is invoked. In this way a combined tracking
247// TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
248// is done in the ITS only. In the standard reconstruction chain this option
249// can be set via AliReconstruction::SetOption("ITS","onlyITS")
250 Int_t rc=0;
251 if(!fITSStandAlone){
252 rc=AliITStrackerMI::Clusters2Tracks(event);
253 }
254 else {
255 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
256 }
257 if(!rc) rc=FindTracks(event);
258 return rc;
259}
260
13918578 261//____________________________________________________________________________
262void AliITStrackerSA::Init(){
263 // Reset all data members
264 fPhiEstimate=0;
265 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
266 fLambdac=0;
267 fPhic=0;
268 fCoef1=0;
269 fCoef2=0;
270 fCoef3=0;
271 fPointc[0]=0;
272 fPointc[1]=0;
273 fVert = 0;
274 fVertexer = 0;
13918578 275 SetWindowSizes();
2257f27e 276 fITSclusters = 0;
277 SetSixPoints();
b8ed1a92 278 SetOuterStartLayer(0);
1966f03c 279 SetSAFlag(kFALSE);
4e05ab9a 280 fListOfTracks=new TObjArray(0,0);
7e5bf5af 281 fCluLayer = 0;
282 fCluCoord = 0;
627b6db6 283 }
13918578 284//_______________________________________________________________________
285void AliITStrackerSA::ResetForFinding(){
286 // Reset data members used in all loops during track finding
287 fPhiEstimate=0;
288 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
289 fLambdac=0;
290 fPhic=0;
291 fCoef1=0;
292 fCoef2=0;
293 fCoef3=0;
294 fPointc[0]=0;
295 fPointc[1]=0;
4e05ab9a 296 fListOfTracks->Delete();
13918578 297}
bef31448 298
7e5bf5af 299
2257f27e 300
bef31448 301//______________________________________________________________________
af885e0f 302Int_t AliITStrackerSA::FindTracks(AliESDEvent* event){
bef31448 303
7e5bf5af 304// Track finder using the ESD object
305
2257f27e 306
7e5bf5af 307 //controllare numero cluster sui layer1 e 2 (morti?)
308 //non trova tracce...controllare..
4e05ab9a 309
2257f27e 310 if(!fITSclusters){
311 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
312 return -1;
bef31448 313 }
7e5bf5af 314
315
316 //Reads event and mark clusters of traks already found, with flag kITSin
ebda3140 317 Int_t nentr=event->GetNumberOfTracks();
318 while (nentr--) {
319 AliESDtrack *track=event->GetTrack(nentr);
320 if (track->GetStatus()&AliESDtrack::kITSin==AliESDtrack::kITSin){
321 Int_t idx[12];
322 Int_t ncl = track->GetITSclusters(idx);
323 for(Int_t k=0;k<ncl;k++){
324 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
325 cll->SetBit(kSAflag);
326 }
327 }
328 }
329 //Get primary vertex
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 Int_t nclusters[6]={0,0,0,0,0,0};
335 Int_t dmar[6]={0,0,0,0,0,0};
336 if (fCluLayer == 0) {
337 fCluLayer = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
338 fCluCoord = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
339 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
340 fCluLayer[i]=0;
341 fCluCoord[i]=0;
342 }
343 }
344 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
345 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
346 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
347 AliITSlayer &layer=fgLayers[i];
348 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
349 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
350 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
351 if(cls->GetQ()==0) continue; //fake clusters dead zones
352 nclusters[i]++;
353 }
354 dmar[i]=0;
355 delete fCluLayer[i];
356 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
357 delete fCluCoord[i];
358 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
359 }
360
361 for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
362 TClonesArray &clulay = *fCluLayer[ilay];
363 TClonesArray &clucoo = *fCluCoord[ilay];
364 AliITSlayer &layer=fgLayers[ilay];
365 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
366 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
367 if(cls->TestBit(kSAflag)==kTRUE) continue;
368 if(cls->GetQ()==0) continue;
369 Double_t phi=0;Double_t lambda=0;
370 Float_t x=0;Float_t y=0;Float_t z=0;
371 Float_t sx=0;Float_t sy=0;Float_t sz=0;
372 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
373 GetCoorErrors(cls,sx,sy,sz);
374 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
375 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
376 dmar[ilay]++;
377 }
378 }
7e5bf5af 379
ebda3140 380 Int_t minNPoints = (fSixPoints ? AliITSgeomTGeo::GetNLayers() : AliITSgeomTGeo::GetNLayers()-1);
381 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
382 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) {
383 minNPoints--;
384 }
385 }
7e5bf5af 386
387
ebda3140 388 Int_t ntrack=0;
389 //loop on the different windows
390 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()];//counter for clusters on each layer
391 for(Int_t nloop=0;nloop<fNloop;nloop++){
392 for(Int_t ncl=0;ncl<fCluLayer[0]->GetEntries();ncl++){ //loop starting from layer 0
393
394 ResetForFinding();
395 Int_t pflag=0;
396
397 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[0]->At(ncl);
398
399 if(!cl) continue;
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();
414 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ nn[i]=0;}
415 nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
416 nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 417 if(nn[1]>0){
418 pflag=1;
419 fPoint3[0] = fPointc[0];
420 fPoint3[1] = fPointc[1];
421 }
cfe729e0 422 nn[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 423 if(nn[1]==0 && nn[2]==0) pflag=0;
424 if(nn[2]!=0 && nn[1]!=0){ pflag=1; UpdatePoints();}
425 if(nn[2]!=0 && nn[1]==0){
426 pflag=1;
427 fPoint3[0]=fPointc[0];
428 fPoint3[1]=fPointc[1];
429 }
13918578 430
cfe729e0 431 nn[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 432 pflag=1;
433 if(nn[3]!=0) UpdatePoints();
cfe729e0 434 nn[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 435 pflag=1;
436 if(nn[4]!=0) UpdatePoints();
cfe729e0 437 nn[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 438
439
440 Int_t layOK=0;
2755f080 441 //check of the candidate track
442 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers();nnp++) {
bef31448 443 if(nn[nnp]!=0) layOK+=1;
444 }
7e5bf5af 445
2755f080 446 if(layOK>=minNPoints){
447 AliITStrackV2* tr2 = 0;
ebda3140 448 tr2 = FitTrack(trs,primaryVertex);
2755f080 449 if(!tr2) continue;
7e5bf5af 450
bef31448 451 AliESDtrack outtrack;
452 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
453 event->AddTrack(&outtrack);
bef31448 454 ntrack++;
bef31448 455 }
456 delete trs;
7e5bf5af 457 }//end loop on clusters of layer1
7e5bf5af 458 //end loop2
ebda3140 459 }
2755f080 460
ebda3140 461 delete[] nn;
2755f080 462
7e5bf5af 463
ebda3140 464 minNPoints--;
7e5bf5af 465
ebda3140 466 //if 5/6 points are required, second loop starting
467 //from second layer (SPD2), to find tracks with point of
468 //layer 1 missing
469 if(!fSixPoints) {
470 //printf("looking from SPD2\n");
471 // counter for clusters on each layer
472 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-1];
473 for(Int_t nloop=0;nloop<fNloop;nloop++){
474 Int_t ncl2=fCluLayer[1]->GetEntries();
475 while(ncl2--){ //loop starting from layer 2
476 ResetForFinding();
477 Int_t pflag=0;
478 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[1]->At(ncl2);
479
480 if(!cl) continue;
481 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(1,ncl2);
482 fPhic = arr->GetPhi();
483 fLambdac = arr->GetLambda();
484 fPhiEstimate = fPhic;
485
486 AliITStrackSA* trs = new AliITStrackSA();
487 fPoint1[0]=primaryVertex[0];
488 fPoint1[1]=primaryVertex[1];
489
490 fPoint2[0]=arr->GetX();
491 fPoint2[1]=arr->GetY();
492 for(Int_t kk=0;kk<AliITSgeomTGeo::GetNLayers()-1;kk++)nn[kk] = 0;
493 nn[0] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],
494 trs,primaryVertex[2],pflag);
495 nn[1] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],
496 trs,primaryVertex[2],pflag);
497 if(nn[1]!=0){
498 pflag=1;
499 fPoint3[0]=fPointc[0];
500 fPoint3[1]=fPointc[1];
501 }
502 nn[2]= SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],
503 trs,primaryVertex[2],pflag);
504 if(nn[2]!=0){
505 pflag=1;
506 UpdatePoints();
507 }
508 nn[3]= SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],
509 trs,primaryVertex[2],pflag);
510 if(nn[3]!=0){
511 pflag=1;
512 UpdatePoints();
513 }
514 nn[4]=SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],
515 trs,primaryVertex[2],pflag);
516
517 Int_t fl=0;
518 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-1;nnp++){
519 if(nn[nnp]!=0) fl+=1;
520 }
521 if(fl>=minNPoints){ // 5/6
522 AliITStrackV2* tr2 = 0;
523 tr2 = FitTrack(trs,primaryVertex);
524 if(!tr2) continue;
525
526 AliESDtrack outtrack;
527 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
528 event->AddTrack(&outtrack);
529 ntrack++;
530
531 }
532
bef31448 533 delete trs;
534 }//end loop on clusters of layer2
ebda3140 535 }
536
537 delete [] nn;
538 } //end opt="5/6"
539
540 // search for tracks starting from SPD2, SDD1, SDD2, SSD2
541 // for cosmics (A. Dainese 31.07.07)
542 if(fOuterStartLayer>0) {
543 for(Int_t innLay=1; innLay<=fOuterStartLayer; innLay++) {
544 //printf("Searching from layer %d outward\n",innLay);
545 minNPoints=AliITSgeomTGeo::GetNLayers()-innLay;
546 for(Int_t i=innLay;i<AliITSgeomTGeo::GetNLayers();i++)
547 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i))
548 minNPoints--;
549 // counter for clusters on each layer
550 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-innLay];
551 for(Int_t nloop=0;nloop<fNloop;nloop++){
552 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
553 while(nclInnLay--){ //loop starting from layer innLay
554 ResetForFinding();
555 Int_t pflag=0;
556 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay);
557
558 if(!cl) continue;
559 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay);
560 fPhic = arr->GetPhi();
561 fLambdac = arr->GetLambda();
562 fPhiEstimate = fPhic;
563
564 AliITStrackSA* trs = new AliITStrackSA();
565 fPoint1[0]=primaryVertex[0];
566 fPoint1[1]=primaryVertex[1];
567 fPoint2[0]=arr->GetX();
568 fPoint2[1]=arr->GetY();
569
570 Int_t kk;
571 for(kk=0;kk<AliITSgeomTGeo::GetNLayers()-innLay;kk++) nn[kk] = 0;
572
573 kk=0;
574 nn[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
b8ed1a92 575 trs,primaryVertex[2],pflag);
ebda3140 576 for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) {
577 kk++;
578 nn[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
579 trs,primaryVertex[2],pflag);
580 if(nn[kk]!=0){
581 pflag=1;
582 if(kk==1) {
583 fPoint3[0]=fPointc[0];
584 fPoint3[1]=fPointc[1];
585 } else {
586 UpdatePoints();
587 }
588 }
589 }
590
591 Int_t fl=0;
592 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
593 if(nn[nnp]!=0) fl+=1;
594 }
595 if(fl>=minNPoints){
596 AliITStrackV2* tr2 = 0;
597 tr2 = FitTrack(trs,primaryVertex);
598 if(!tr2) continue;
599
600
601 AliESDtrack outtrack;
602 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
603 event->AddTrack(&outtrack);
604 ntrack++;
605
606 }
607
608 delete trs;
609 }//end loop on clusters of innLay
610 } //end loop on window sizes
611
612 delete [] nn;
613 } //end loop on innLay
614 } //end if(fOuterStartLayer>0)
615
616
bef31448 617 delete [] firstmod;
bef31448 618 Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks());
2257f27e 619 return 0;
bef31448 620
621}
7e5bf5af 622
13918578 623//________________________________________________________________________
624
ebda3140 625AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex) {
626 //fit of the found track (most general case, also <6 points, layers missing)
627 // A.Dainese 16.11.07
13918578 628
13918578 629
cc088660 630 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
cc088660 631 TObjArray** listlayer = new TObjArray*[AliITSgeomTGeo::GetNLayers()];
ebda3140 632 Int_t ** clind=new Int_t*[AliITSgeomTGeo::GetNLayers()];
633 Int_t ** clmark=new Int_t*[AliITSgeomTGeo::GetNLayers()];
cc088660 634 Int_t * nnn = new Int_t[AliITSgeomTGeo::GetNLayers()];
635 Int_t * kkk = new Int_t[AliITSgeomTGeo::GetNLayers()];
13918578 636
ebda3140 637 const Int_t maxclu=AliITStrackSA::GetMaxNumberOfClusters();
13918578 638
ebda3140 639 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
b8ed1a92 640 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
b8ed1a92 641 listlayer[i] = new TObjArray(0,0);
ebda3140 642 nnn[i]=0;
643 kkk[i]=0;
644 clind[i]=new Int_t[maxclu];
645 clmark[i]=new Int_t[maxclu];
646 for(Int_t j=0;j<maxclu; j++){
647 clind[i][j]=0;
648 clmark[i][j]=0;
b8ed1a92 649 }
650 }
2755f080 651
2755f080 652
653 Int_t nclusters = tr->GetNumberOfClustersSA();
2755f080 654 for(Int_t ncl=0;ncl<nclusters;ncl++){
655 Int_t index = tr->GetClusterIndexSA(ncl);
656 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
657 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
658 Int_t lay = (index & 0xf0000000) >> 28;
ebda3140 659 listlayer[lay]->AddLast(cl);
660 Int_t ind=nnn[lay];
661 clind[lay][ind]=index;
2755f080 662 }
663 delete [] nnn;
664
665 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
666 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
667 Int_t mark = tr->GetClusterMark(nlay,ncl);
ebda3140 668 Int_t ind=kkk[nlay];
669 clmark[nlay][ind]=mark;
2755f080 670 }
671 }
672
673 delete [] kkk;
674
675 Int_t firstLay=-1,secondLay=-1;
676 Int_t * end = new Int_t[AliITSgeomTGeo::GetNLayers()];
677 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
678 if(listlayer[i]->GetEntries()==0) {
679 end[i]=1;
680 } else {
681 end[i]=listlayer[i]->GetEntries();
682 if(firstLay==-1) {
683 firstLay=i;
684 } else if(secondLay==-1) {
685 secondLay=i;
686 }
687 }
688 }
689
690 TClonesArray* listSA = new TClonesArray("AliITStrackSA");
691 TClonesArray &tri = *listSA;
692 Int_t nlist=0;
693
694 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
695 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l0);
696 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
697 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l1);
698 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
699 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l2);
700 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
701 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3]->At(l3);
702 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
703 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l4);
704 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
705 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l5);
706
707
708 Double_t x1,y1,z1,sx1,sy1,sz1;
709 Double_t x2,y2,z2,sx2,sy2,sz2;
710 AliITSRecPoint* p1=0;
711 AliITSRecPoint* p2=0;
712 Int_t index1=0,index2=0;
713 Int_t mrk1=0,mrk2=0;
714
715 switch(firstLay) {
716 case 0:
717 p1=cl0;
ebda3140 718 index1=clind[0][l0];mrk1=clmark[0][l0];
2755f080 719 break;
720 case 1:
721 p1=cl1;
ebda3140 722 index1=clind[1][l1];mrk1=clmark[1][l1];
2755f080 723 break;
724 case 2:
725 p1=cl2;
ebda3140 726 index1=clind[2][l2];mrk1=clmark[2][l2];
2755f080 727 break;
728 case 3:
729 p1=cl3;
ebda3140 730 index1=clind[3][l3];mrk1=clmark[3][l3];
2755f080 731 break;
732 case 4:
733 p1=cl4;
ebda3140 734 index1=clind[4][l4];mrk1=clmark[4][l4];
2755f080 735 break;
736 }
737
738 switch(secondLay) {
739 case 1:
740 p2=cl1;
ebda3140 741 index2=clind[1][l1];mrk2=clmark[1][l1];
2755f080 742 break;
743 case 2:
744 p2=cl2;
ebda3140 745 index2=clind[2][l2];mrk2=clmark[2][l2];
2755f080 746 break;
747 case 3:
748 p2=cl3;
ebda3140 749 index2=clind[3][l3];mrk2=clmark[3][l3];
2755f080 750 break;
751 case 4:
752 p2=cl4;
ebda3140 753 index2=clind[4][l4];mrk2=clmark[4][l4];
2755f080 754 break;
755 case 5:
756 p2=cl5;
ebda3140 757 index2=clind[5][l5];mrk2=clmark[5][l5];
2755f080 758 break;
759 }
760
761 Int_t module1 = p1->GetDetectorIndex()+firstmod[firstLay];
762
763 Int_t cln1=mrk1;
764 Int_t cln2=mrk2;
765 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1);
766 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2);
767 x1 = arr1->GetX();
768 x2 = arr2->GetX();
769 y1 = arr1->GetY();
770 y2 = arr2->GetY();
771 z1 = arr1->GetZ();
772 z2 = arr2->GetZ();
773 sx1 = arr1->GetSx();
774 sx2 = arr2->GetSx();
775 sy1 = arr1->GetSy();
776 sy2 = arr2->GetSy();
777 sz1 = arr1->GetSz();
778 sz2 = arr2->GetSz();
779
780 Int_t layer,ladder,detector;
781 AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
782 Float_t yclu1 = p1->GetY();
783 Float_t zclu1 = p1->GetZ();
784 Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
785 Double_t tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
786 Double_t phi2 = TMath::ATan2((y2-y1),(x2-x1));
787 AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
788
789 if(cl5!=0) {
ebda3140 790 trac->AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0);
791 trac->AddClusterMark(5,clmark[5][l5]);
b8ed1a92 792 }
793 if(cl4!=0){
ebda3140 794 trac->AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0);
795 trac->AddClusterMark(4,clmark[4][l4]);
b8ed1a92 796 }
797 if(cl3!=0){
ebda3140 798 trac->AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0);
799 trac->AddClusterMark(3,clmark[3][l3]);
b8ed1a92 800 }
801 if(cl2!=0){
ebda3140 802 trac->AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0);
803 trac->AddClusterMark(2,clmark[2][l2]);
b8ed1a92 804 }
805 if(cl1!=0){
ebda3140 806 trac->AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0);
807 trac->AddClusterMark(1,clmark[1][l1]);
b8ed1a92 808 }
809 if(cl0!=0){
ebda3140 810 trac->AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0);
811 trac->AddClusterMark(0,clmark[0][l0]);
b8ed1a92 812 }
813
814
815 //fit with Kalman filter using AliITStrackerMI::RefitAt()
816 AliITStrackMI* ot = new AliITStrackSA(*trac);
817
818 ot->ResetCovariance(10.);
819 ot->ResetClusters();
820
e50912db 821 if(RefitAt(AliITSRecoParam::GetrInsideITSscreen(),ot,trac)){ //fit from layer 1 to layer 6
b8ed1a92 822 AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
823 otrack2->ResetCovariance(10.);
824 otrack2->ResetClusters();
825 //fit from layer 6 to layer 1
e50912db 826 if(RefitAt(AliITSRecoParam::GetrInsideSPD1(),otrack2,ot)) {
b8ed1a92 827 fListOfTracks->AddLast(otrack2);
828 new (tri[nlist]) AliITStrackSA(*trac);
829 nlist++;
830 } else {
831 delete otrack2;
832 }
833
834 }
835
836 delete ot;
837 delete trac;
838 }//end loop layer 6
839 }//end loop layer 5
840 }//end loop layer 4
841 }//end loop layer 3
842 }//end loop layer 2
843 }//end loop layer 1
844
845 delete [] end;
846
847
848
849 Int_t dim=fListOfTracks->GetEntries();
850 if(dim==0){
851 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
852 delete listlayer[i];
ebda3140 853 delete clind[i];
854 delete clmark[i];
b8ed1a92 855 }
856 delete [] listlayer;
ebda3140 857 delete [] clind;
858 delete [] clmark;
b8ed1a92 859 listSA->Delete();
860 delete listSA;
861 delete [] firstmod;
862 return 0;
863 }
864
865 Int_t lowchi2 = FindTrackLowChiSquare(fListOfTracks,dim);
866 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
867 AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2);
868
869 if(otrack==0) {
870 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
871 delete listlayer[i];
ebda3140 872 delete clind[i];
873 delete clmark[i];
b8ed1a92 874 }
875 delete [] listlayer;
ebda3140 876 delete [] clind;
877 delete [] clmark;
b8ed1a92 878 listSA->Delete();
879 delete listSA;
880 delete [] firstmod;
ebda3140 881 delete [] clind;
882 delete [] clmark;
b8ed1a92 883 return 0;
884 }
885 Int_t * indexc = new Int_t[AliITSgeomTGeo::GetNLayers()];
886 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
887 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
888 indexc[nind] = otrack->GetClusterIndex(nind);
889 }
890 Int_t labl[6][3];
891 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
892 if(i<otrack->GetNumberOfClusters()) {
893 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc[i]);
894 labl[i][0]=cl->GetLabel(0);
895 labl[i][1]=cl->GetLabel(1);
896 labl[i][2]=cl->GetLabel(2);
897 } else {
898 labl[i][0]=-1;
899 labl[i][1]=-1;
900 labl[i][2]=-1;
901 }
902 }
903 delete [] indexc;
2755f080 904
b8ed1a92 905 CookLabel(otrack,0.); //MI change - to see fake ratio
906
907 Int_t label=FindLabel(labl[0][0],labl[1][0],labl[2][0],labl[3][0],labl[4][0],labl[5][0]);
908 Int_t lflag=0;
2755f080 909 for(Int_t i=0;i<otrack->GetNumberOfClusters();i++)
b8ed1a92 910 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
911
2755f080 912 if(lflag<otrack->GetNumberOfClusters()) label = -label;
b8ed1a92 913 otrack->SetLabel(label);
914
915 //remove clusters of found track
916 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
917 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
918 Int_t index = trsa->GetClusterMark(nlay,cln);
919 fCluLayer[nlay]->RemoveAt(index);
920 RemoveClusterCoord(nlay,index);
921 fCluLayer[nlay]->Compress();
7e5bf5af 922 }
923 }
924 listSA->Delete();
925 delete listSA;
926
cc088660 927 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
13918578 928 delete listlayer[i];
ebda3140 929 delete clind[i];
930 delete clmark[i];
13918578 931 }
c09cece6 932 delete [] listlayer;
037efb75 933 delete [] firstmod;
ebda3140 934 delete [] clind;
935 delete [] clmark;
13918578 936 return otrack;
937
938}
939
bef31448 940
4e05ab9a 941
bef31448 942//_______________________________________________________
7e5bf5af 943Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){
13918578 944 //function used to to find the clusters associated to the track
2755f080 945
946 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(layer)) return 0;
947
13918578 948 Int_t nc=0;
949 AliITSlayer &lay = fgLayers[layer];
7e5bf5af 950 Double_t r=lay.GetR();
2755f080 951 if(pflag==1){
cfe729e0 952 Float_t cx1,cx2,cy1,cy2;
953 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
954 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
955 return 0;
1966f03c 956 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
957 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
cfe729e0 958 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
959 }
13918578 960
7e5bf5af 961
962 Int_t ncl = fCluLayer[layer]->GetEntries();
963 for (Int_t index=0; index<ncl; index++) {
00a7cc50 964 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
7e5bf5af 965 if (!c) continue;
966 if (c->GetQ()<=0) continue;
967
968 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
969 Double_t phi = arr->GetPhi();
cfe729e0 970 if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue;
494fda7c 971
7e5bf5af 972 Double_t lambda = arr->GetLambda();
cfe729e0 973 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
974
7e5bf5af 975 if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0;
976 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
977 Int_t orind = arr->GetOrInd();
978 trs->AddClusterSA(layer,orind);
979 trs->AddClusterMark(layer,index);
980
cfe729e0 981 nc++;
982 fLambdac=lambda;
983 fPhiEstimate=phi;
cfe729e0 984
7e5bf5af 985 fPointc[0]=arr->GetX();
986 fPointc[1]=arr->GetY();
987
cfe729e0 988 }
989 return nc;
990}
13918578 991
bef31448 992//________________________________________________________________
993void AliITStrackerSA::UpdatePoints(){
994 //update of points for the estimation of the curvature
13918578 995
bef31448 996 fPoint2[0]=fPoint3[0];
997 fPoint2[1]=fPoint3[1];
998 fPoint3[0]=fPointc[0];
999 fPoint3[1]=fPointc[1];
13918578 1000
1001
13918578 1002}
13918578 1003
13918578 1004//___________________________________________________________________
1005Int_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){
1006
1007 //given (x,y) of three recpoints (in global coordinates)
1008 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
1009
1010 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1011 if(den==0) return 0;
1012 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1013 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1014 c = -x1*x1-y1*y1-a*x1-b*y1;
1015 return 1;
1016 }
1017//__________________________________________________________________________
1018 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){
1019
1020 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
1021 //c2 is -rlayer*rlayer
1022
1023 if(a1==0) return 0;
3a2f227d 1024 Double_t m = c2-c1;
1025 Double_t aA = (b1*b1)/(a1*a1)+1;
1026 Double_t bB = (-2*m*b1/(a1*a1));
1027 Double_t cC = c2+(m*m)/(a1*a1);
1028 Double_t dD = bB*bB-4*aA*cC;
1029 if(dD<0) return 0;
13918578 1030
3a2f227d 1031 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
1032 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
13918578 1033 x1 = (c2-c1-b1*y1)/a1;
1034 x2 = (c2-c1-b1*y2)/a1;
1035
1036 return 1;
1037}
1038//____________________________________________________________________
1039Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t
1040x2,Double_t y2,Double_t x3,Double_t y3){
1041
1042 //calculates the curvature of track
1043 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1044 if(den==0) return 0;
1045 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1046 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1047 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
1048 Double_t xc=-a/2.;
1049
1050 if((a*a+b*b-4*c)<0) return 0;
1051 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
1052 if(rad==0) return 0;
1053
1054 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
1055 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
1056 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
1057 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
1058
1059 return 1/rad;
1060
1061}
7e5bf5af 1062
1063
13918578 1064//____________________________________________________________________
1065Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
1066
1067 //Returns the point closest to pp
1068
1069 Double_t diff1 = p1-pp;
1070 Double_t diff2 = p2-pp;
1071
1072 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
1073 else fPhiEstimate=p2;
1074 return fPhiEstimate;
1075
1076}
1077
1078
1079//_________________________________________________________________
7e5bf5af 1080Int_t AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const {
52a9777e 1081 // returns track with lowers chi square
13918578 1082 if(dim==1){
7e5bf5af 1083 //AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(0);
1084 //return trk;
1085 return 0;
13918578 1086 }
52a9777e 1087 if(dim==0) return 0;
037efb75 1088 Double_t * chi2 = new Double_t[dim];
1089 Int_t * index = new Int_t[dim];
13918578 1090 for(Int_t i=0;i<dim;i++){
1091 AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(i);
1092 chi2[i]=trk->GetChi2();
1093 index[i]=i;
1094 }
1095
1096 Int_t w=0;Double_t value;
1097 Int_t lp;
1098 while(w<dim){
1099 for(Int_t j=w+1;j<dim;j++){
1100 if(chi2[w]<chi2[j]){
bef31448 1101 value=chi2[w];
1102 chi2[w]=chi2[j];
1103 chi2[j]=value;
1104 lp=index[w];
1105 index[w]=index[j];
1106 index[j]=lp;
13918578 1107 }
1108 }
1109 w++;
1110 }
52a9777e 1111 Int_t tmp = index[dim-1];
037efb75 1112 delete [] chi2;
1113 delete [] index;
52a9777e 1114 return tmp;
13918578 1115}
1116
1117//__________________________________________________________
2755f080 1118Int_t AliITStrackerSA::FindLabel(Int_t l0, Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5){
13918578 1119
1120 //function used to determine the track label
1121
2755f080 1122 Int_t lb[6] = {l0,l1,l2,l3,l4,l5};
13918578 1123 Int_t aa[6]={1,1,1,1,1,1};
1124 Int_t ff=0;
1125 Int_t ll=0;
1126 Int_t k=0;Int_t w=0;Int_t num=6;
8b3779ef 1127 for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i;
13918578 1128
1129 while(k<num){
1130
1131 for(Int_t i=k+1;i<num;i++){
1132
1133 if(lb[k]==lb[i] && aa[k]!=0){
1134
1135 aa[k]+=1;
1136 aa[i]=0;
1137 }
1138 }
8b3779ef 1139 k++;
13918578 1140 }
1141
1142 while(w<num){
8b3779ef 1143
13918578 1144 for(Int_t j=0;j<6;j++){
1145 if(aa[w]<aa[j]){
1146 ff=aa[w];
1147 aa[w]=aa[j];
1148 aa[j]=ff;
1149 ll=lb[w];
1150 lb[w]=lb[j];
1151 lb[j]=ll;
1152 }
1153 }
8b3779ef 1154 w++;
13918578 1155 }
8b3779ef 1156
1157 if(num<1) return -1;
1158 return lb[num-1];
13918578 1159}
1160
1161//_____________________________________________________________________________
1162Int_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,
2755f080 1163Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){
13918578 1164
1165
1166 //function used to assign label to the found track. If track is fake, the label is negative
1167
1168 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1169 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1170 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1171 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1172 Int_t lflag=0;Int_t num=6;
1173 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1174
1175 for(Int_t i=0;i<num;i++){
1176 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1177 }
1178
2755f080 1179 if(lflag>=minNPoints) return ll;
13918578 1180 else return -ll;
1181
1182
1183}
1184
1185//_____________________________________________________________________________
1186void AliITStrackerSA::SetWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1187 // Set sizes of the phi and lambda windows used for track finding
1188 fNloop = n;
1189 if(phi){ // user defined values
1190 fPhiWin = new Double_t[fNloop];
1191 fLambdaWin = new Double_t[fNloop];
1192 for(Int_t k=0;k<fNloop;k++){
1193 fPhiWin[k]=phi[k];
1194 fLambdaWin[k]=lam[k];
1195 }
1196 }
1197 else { // default values
627b6db6 1198
1199 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
bef31448 1200 0.005,0.0053,0.0055,
1201 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1202 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
627b6db6 1203 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1204 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1205 0.005,0.005,0.006,
1206 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1207 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1208 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
bef31448 1209
627b6db6 1210 if(fNloop!=33){
1211 fNloop = 33;
13918578 1212 }
627b6db6 1213
1214
13918578 1215 fPhiWin = new Double_t[fNloop];
1216 fLambdaWin = new Double_t[fNloop];
e340bb86 1217
e340bb86 1218 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes(); // possibility to enlarge windows for cosmics reco with large misalignments (A.Dainese)
2755f080 1219
1220 for(Int_t k=0;k<fNloop;k++){
e340bb86 1221 fPhiWin[k]=phid[k]*factor;
1222 fLambdaWin[k]=lambdad[k]*factor;
13918578 1223 }
1224
1225 }
1226
1227}
7e5bf5af 1228//_______________________________________________________________________
cc088660 1229void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){
7e5bf5af 1230 //Returns values of phi (azimuthal) and lambda angles for a given cluster
cc088660 1231/*
7e5bf5af 1232 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1233 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1234 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1235
1236 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1237 Double_t phi1=TMath::Pi()/2+alpha;
1238 if (lay==1) phi1+=TMath::Pi();
1239
1240 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1241 Float_t r=tx*cp+ty*sp;
1242
cc088660 1243 xyz= r*cp - cl->GetY()*sp;
7e5bf5af 1244 y= r*sp + cl->GetY()*cp;
1245 z=cl->GetZ();
cc088660 1246*/
1247 Float_t xyz[3];
1248 cl->GetGlobalXYZ(xyz);
1249 x=xyz[0];
1250 y=xyz[1];
1251 z=xyz[2];
1252
1966f03c 1253 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
7e5bf5af 1254 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1255}
13918578 1256
7e5bf5af 1257//________________________________________________________________________
cc088660 1258void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
7e5bf5af 1259
cc088660 1260 //returns sigmax, y, z of cluster in global coordinates
1261/*
7e5bf5af 1262 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
cc088660 1263 Int_t lay,lad,det;
1264 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
7e5bf5af 1265
1266 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1267 Double_t phi=TMath::Pi()/2+alpha;
1268 if (lay==1) phi+=TMath::Pi();
1269
1270 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
cc088660 1271*/
1272 Float_t covm[6];
1273 cl->GetGlobalCov(covm);
1274 sx=TMath::Sqrt(covm[0]);
1275 sy=TMath::Sqrt(covm[3]);
1276 sz=TMath::Sqrt(covm[5]);
1277/*
7e5bf5af 1278 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1279 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1280 sz = TMath::Sqrt(cl->GetSigmaZ2());
cc088660 1281*/
7e5bf5af 1282}
cc088660 1283