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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
16////////////////////////////////////////////////////
17// Stand alone tracker class //
18// Origin: Elisabetta Crescio //
19// e-mail: crescio@to.infn.it //
20// tracks are saved as AliITStrackV2 objects //
21////////////////////////////////////////////////////
22
aa4b78e1 23#include <stdlib.h>
13918578 24#include "TArrayI.h"
25#include <TBranch.h>
26#include <TMath.h>
27#include <TObjArray.h>
28#include <TTree.h>
29#include "AliRun.h"
30#include "AliITSclusterTable.h"
31#include "AliITSclusterV2.h"
32#include "AliITSgeom.h"
33#include "AliITSRiemannFit.h"
34#include "AliITStrackerSA.h"
35#include "AliITStrackSA.h"
36#include "AliITSVertexer.h"
d681bb2d 37#include "AliESDVertex.h"
bef31448 38#include "AliESD.h"
39#include "AliESDtrack.h"
13918578 40
41ClassImp(AliITStrackerSA)
42
43//____________________________________________________________________________
44AliITStrackerSA::AliITStrackerSA():AliITStrackerV2(){
45 // Default constructor
46 Init();
627b6db6 47
13918578 48}
2257f27e 49//____________________________________________________________________________
50AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom):AliITStrackerV2(geom)
51{
52 // Standard constructor (Vertex is known and passed to this obj.)
53 Init();
54 fVert = 0;
55 fGeom = geom;
627b6db6 56
2257f27e 57}
58
13918578 59//____________________________________________________________________________
d681bb2d 60AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom, AliESDVertex *vert):AliITStrackerV2(geom)
13918578 61{
62 // Standard constructor (Vertex is known and passed to this obj.)
63 Init();
64 fVert = vert;
65 fGeom = geom;
627b6db6 66
13918578 67}
68
69//______________________________________________________________________
70AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA &trkr) :
71 AliITStrackerV2(trkr) {
72 // Copy constructor
73 // Copies are not allowed. The method is protected to avoid misuse.
74 Error("AliITStrackerSA","Copy constructor not allowed\n");
75}
76
77//______________________________________________________________________
78AliITStrackerSA& AliITStrackerSA::operator=(const
79 AliITStrackerSA& /* trkr */){
80 // Assignment operator
81 // Assignment is not allowed. The method is protected to avoid misuse.
82 Error("= operator","Assignment operator not allowed\n");
83 return *this;
84}
85
86//____________________________________________________________________________
87AliITStrackerSA::AliITStrackerSA(AliITSgeom *geom, AliITSVertexer *vertexer):AliITStrackerV2(geom)
88{
89 // Standard constructor (Vertex is unknown - vertexer is passed to this obj)
90 Init();
91 fVertexer = vertexer;
92 fGeom = geom;
627b6db6 93
13918578 94}
95
96//____________________________________________________________________________
97AliITStrackerSA::AliITStrackerSA(AliITStrackerSA& tracker):AliITStrackerV2(){
98 // Copy constructor
99 fPhiEstimate = tracker.fPhiEstimate;
100 for(Int_t i=0;i<2;i++){
101 fPoint1[i]=tracker.fPoint1[i];
102 fPoint2[i]=tracker.fPoint2[i];
103 fPoint3[i]=tracker.fPoint3[i];
104 fPointc[i]=tracker.fPointc[i];
105 }
106 fLambdac = tracker.fLambdac;
107 fPhic = tracker.fPhic;
108 fCoef1 = tracker.fCoef1;
109 fCoef2 = tracker.fCoef2;
110 fCoef3 = tracker.fCoef3;
111 fNloop = tracker.fNloop;
112 fPhiWin = tracker.fPhiWin;
113 fLambdaWin = tracker.fLambdaWin;
114 if(tracker.fVertexer && tracker.fVert){
d681bb2d 115 fVert = new AliESDVertex(*tracker.fVert);
13918578 116 }
117 else {
118 fVert = tracker.fVert;
119 }
120 fVertexer = tracker.fVertexer;
121 fGeom = tracker.fGeom;
13918578 122 fTable = tracker.fTable;
4e05ab9a 123 fListOfTracks = tracker.fListOfTracks;
13918578 124}
125
126//____________________________________________________________________________
127AliITStrackerSA::~AliITStrackerSA(){
128 // destructor
d681bb2d 129 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
13918578 130 // and is deleted here
131 if(fVertexer){
132 if(fVert)delete fVert;
133 }
134 fVert = 0;
135 fVertexer = 0;
136 fGeom = 0;
13918578 137 if(fPhiWin)delete []fPhiWin;
138 if(fLambdaWin)delete []fLambdaWin;
139 fTable =0;
4e05ab9a 140 fListOfTracks->Delete();
627b6db6 141 }
13918578 142
143//____________________________________________________________________________
144void AliITStrackerSA::Init(){
145 // Reset all data members
146 fPhiEstimate=0;
147 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
148 fLambdac=0;
149 fPhic=0;
150 fCoef1=0;
151 fCoef2=0;
152 fCoef3=0;
153 fPointc[0]=0;
154 fPointc[1]=0;
155 fVert = 0;
156 fVertexer = 0;
157 fGeom = 0;
13918578 158 SetWindowSizes();
159 fTable = 0;
2257f27e 160 fITSclusters = 0;
161 SetSixPoints();
4e05ab9a 162 fListOfTracks=new TObjArray(0,0);
627b6db6 163 }
13918578 164//_______________________________________________________________________
165void AliITStrackerSA::ResetForFinding(){
166 // Reset data members used in all loops during track finding
167 fPhiEstimate=0;
168 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
169 fLambdac=0;
170 fPhic=0;
171 fCoef1=0;
172 fCoef2=0;
173 fCoef3=0;
174 fPointc[0]=0;
175 fPointc[1]=0;
4e05ab9a 176 fListOfTracks->Delete();
13918578 177}
178//____________________________________________________________________________
2257f27e 179void AliITStrackerSA::FindTracks(TTree *out,Int_t evnumber){
13918578 180
181 /**************************************************************************
bef31448 182 * This function finds primary tracks.
13918578 183 * *
184 * *
185 * Example: to execute function with only the ITS (no combined tracking *
186 * with TPC+ITS) and requiring 5/6 points to define a good track *
2257f27e 187 * call SetSixPoinbts(kFALSE) in advance and then *
188 * use: FindTracks(treein,treeout,evnumber) *
189 * to execute combined tracking, before using FindTracks, use *
13918578 190 * UseFoundTracksV2 *
191 *************************************************************************/
192
2257f27e 193 if(!fITSclusters){
194 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
195 exit(1);
196 }
13918578 197 //Get primary vertex
198 if(fVertexer){
199 if(fVert)delete fVert;
200 fVert = fVertexer->FindVertexForCurrentEvent(evnumber);
201 }
202 else {
203 gAlice->GetEvent(evnumber);
204 if(!fVert){
205 Fatal("FindTracks","Vertex is missing\n");
206 return;
207 }
208 }
209 Double_t primaryVertex[3];
210 Double_t errorsprimvert[3];
211 fVert->GetXYZ(primaryVertex);
212 fVert->GetSigmaXYZ(errorsprimvert);
213 if(errorsprimvert[0]==0 || errorsprimvert[1]==0){
214 Warning("FindTracks","Set errors on vertex positions x and y at 0.0001");
215 errorsprimvert[0]=0.0001;
216 errorsprimvert[1]=0.0001;
217 }
218 fVert->PrintStatus();
219
bef31448 220
221 //Fill array with cluster indices for each module
222 if(!fTable){
223 fTable = new AliITSclusterTable(fGeom,this,primaryVertex);
2257f27e 224 fTable->FillArray(fITSclusters);
225 fTable->FillArrayCoorAngles();
bef31448 226 }
227
13918578 228
229//Fill tree for found tracks
230 AliITStrackV2* outrack=0;
bef31448 231 TBranch* branch=out->Branch("tracks","AliITStrackV2",&outrack,32000,0);
13918578 232 if (!branch) out->Branch("tracks","AliITStrackV2",&outrack,32000,3);
233 else branch->SetAddress(&outrack);
234
235
037efb75 236 Int_t * firstmod = new Int_t[fGeom->GetNlayers()];
13918578 237 for(Int_t i=0;i<fGeom->GetNlayers();i++){
238 firstmod[i]=fGeom->GetModuleIndex(i+1,1,1);
239 }
240 // firstmod [i] number of the first module in the ITS layer i.
241
242 AliITSlayer &layer=fgLayers[0]; // first layer
243 Int_t ntrack=0;
bef31448 244 Int_t dim=layer.GetNumberOfClusters();
13918578 245 //loop on the different windows
246 for(Int_t nloop=0;nloop<fNloop;nloop++){
bef31448 247 for(Int_t ncl=0;ncl<dim;ncl++){
248 //loop starting from layer 0
13918578 249 ResetForFinding();
250 Int_t pflag=0;
251 AliITSclusterV2* cl = layer.GetCluster(ncl);
627b6db6 252 if(cl->IsUsed()==1) continue;
253 if(cl->TestBit(kSAflag)==kTRUE) continue;
254
bef31448 255 fPhic = fTable->GetPhiCluster(0,ncl);
256 fLambdac = fTable->GetLambdaCluster(0,ncl);
13918578 257 fPhiEstimate = fPhic;
258 AliITStrackSA* trs = new AliITStrackSA();
259 fPoint1[0]=primaryVertex[0];
260 fPoint1[1]=primaryVertex[1];
2257f27e 261 fPoint2[0]=fTable->GetXCluster(0,ncl);
262 fPoint2[1]=fTable->GetYCluster(0,ncl);
13918578 263
037efb75 264 Int_t * nn = new Int_t[fGeom->GetNlayers()];//counter for clusters on each layer
bef31448 265 for(Int_t i=0;i<fGeom->GetNlayers();i++){ nn[i]=0;}
cfe729e0 266 nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
267 nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
13918578 268
269 if(nn[1]>0){
bef31448 270 pflag=1;
271 fPoint3[0] = fPointc[0];
272 fPoint3[1] = fPointc[1];
13918578 273 }
cfe729e0 274 nn[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
13918578 275 if(nn[1]==0 && nn[2]==0) pflag=0;
276 if(nn[2]!=0 && nn[1]!=0){ pflag=1; UpdatePoints();}
277 if(nn[2]!=0 && nn[1]==0){
bef31448 278 pflag=1;
279 fPoint3[0]=fPointc[0];
280 fPoint3[1]=fPointc[1];
13918578 281 }
282
cfe729e0 283 nn[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
13918578 284 pflag=1;
285 if(nn[3]!=0) UpdatePoints();
cfe729e0 286 nn[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
13918578 287 pflag=1;
288 if(nn[4]!=0) UpdatePoints();
cfe729e0 289 nn[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
13918578 290
291
292 Int_t layOK=0;
293 Int_t numberofpoints;
2257f27e 294 if(fSixPoints) numberofpoints=6; //check of the candidate track
13918578 295 else numberofpoints=5; //if track is good (with the required number
296 for(Int_t nnp=0;nnp<fGeom->GetNlayers();nnp++){ //of points) it is written on file
bef31448 297 if(nn[nnp]!=0) layOK+=1;
13918578 298 }
299 if(layOK>=numberofpoints){
2257f27e 300 AliITStrackV2* tr2 = FitTrack(trs,primaryVertex,errorsprimvert);
bef31448 301 if(tr2==0){
302 Int_t nct = trs->GetNumberOfClustersSA();
303 while(nct--){
304 Int_t index = trs->GetClusterIndexSA(nct);
305 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
627b6db6 306 if(kl->TestBit(kSAflag)==kTRUE) kl->ResetBit(kSAflag);
bef31448 307 }
4e05ab9a 308 continue;
bef31448 309 }
310 outrack=tr2;
311 out->Fill();
312 ntrack++;
313 Int_t nct = tr2->GetNumberOfClusters();
314
315 while(nct--){
316 Int_t index = tr2->GetClusterIndex(nct);
317 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
627b6db6 318 kl->SetBit(kSAflag);
bef31448 319
320 }
321 }
13918578 322 else{
bef31448 323 Int_t nct = trs->GetNumberOfClustersSA();
324 while(nct--){
325 Int_t index = trs->GetClusterIndexSA(nct);
326 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
627b6db6 327 if(kl->TestBit(kSAflag)==kTRUE) kl->ResetBit(kSAflag);
bef31448 328 }
13918578 329 }
330 delete trs;
331
332 }//end loop on clusters of layer1
333
334 }//end loop2
335
336 //if 5/6 points are required, second loop starting
337 //from second layer, to find tracks with point of
338 //layer 1 missing
339
2257f27e 340 if(!fSixPoints){
13918578 341 // counter for clusters on each layer
037efb75 342 Int_t * nn = new Int_t[fGeom->GetNlayers()-1];
13918578 343 for(Int_t nloop=0;nloop<fNloop;nloop++){
344 AliITSlayer &layer2=fgLayers[1]; //loop on layer 2
345 Int_t ncl2=layer2.GetNumberOfClusters();
346 while(ncl2--){ //loop starting from layer 2
bef31448 347 ResetForFinding();
348 Int_t pflag=0;
349 AliITSclusterV2* cl = layer2.GetCluster(ncl2);
350 if(cl->IsUsed()==1) continue;
627b6db6 351 if(cl->TestBit(kSAflag)==kTRUE) continue;
bef31448 352 fPhic = fTable->GetPhiCluster(1,ncl2);
353 fLambdac = fTable->GetLambdaCluster(1,ncl2);
354 fPhiEstimate = fPhic;
355 AliITStrackSA* trs = new AliITStrackSA();
13918578 356
bef31448 357 fPoint1[0]=primaryVertex[0];
358 fPoint1[1]=primaryVertex[1];
359 fPoint2[0]=fTable->GetXCluster(1,ncl2);;
360 fPoint2[1]=fTable->GetYCluster(1,ncl2);;
13918578 361
bef31448 362 for(Int_t kk=0;kk<fGeom->GetNlayers()-1;kk++)nn[kk] = 0;
363 for(Int_t kk=0;kk<fGeom->GetNlayers()-1;kk++){
364 nn[kk] = SearchClusters(kk+1,fPhiWin[nloop],fLambdaWin[nloop],
cfe729e0 365 trs,primaryVertex[2],pflag);
bef31448 366 if(nn[kk]==0)break;
367 if(kk>0){
368 UpdatePoints();
369 pflag = 1;
370 }
371 }
372 Int_t fl=0;
373 for(Int_t nnp=0;nnp<fGeom->GetNlayers()-1;nnp++){
374 if(nn[nnp]!=0) fl+=1;
375 }
376 if(fl>=5){ // 5/6
2257f27e 377 AliITStrackV2* tr2 = FitTrack(trs,primaryVertex,errorsprimvert);
bef31448 378 if(tr2==0){
379 Int_t nct = trs->GetNumberOfClustersSA();
380 while(nct--){
381 Int_t index = trs->GetClusterIndexSA(nct);
382 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
627b6db6 383 if(kl->TestBit(kSAflag)==kTRUE) kl->ResetBit(kSAflag);
bef31448 384 }
385 continue;
386 }
387 outrack=tr2;
388 out->Fill();
389 Int_t nct = tr2->GetNumberOfClusters();
390 while(nct--){
391 Int_t index = tr2->GetClusterIndex(nct);
392 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
393 if(kl==0) continue;
627b6db6 394 kl->SetBit(kSAflag);
bef31448 395 }
396 }
397 else{
398 Int_t nct = trs->GetNumberOfClustersSA();
399 while(nct--){
400 Int_t index = trs->GetClusterIndexSA(nct);
401 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
402 if(kl==0) continue;
627b6db6 403 if(kl->TestBit(kSAflag)==kTRUE) kl->ResetBit(kSAflag);
404 }
bef31448 405 }
406 delete trs;
13918578 407 }//end loop on clusters of layer2
408 }
037efb75 409 delete [] nn;
2257f27e 410 } // if(!fSixPoints....
13918578 411
037efb75 412 delete [] firstmod;
627b6db6 413 delete fTable; fTable=0;
13918578 414}
bef31448 415
2257f27e 416
bef31448 417//______________________________________________________________________
2257f27e 418Int_t AliITStrackerSA::FindTracks(AliESD* event){
bef31448 419
2257f27e 420 // Track finder using the ESD object
421
4e05ab9a 422
2257f27e 423 if(!fITSclusters){
424 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
425 return -1;
bef31448 426 }
2257f27e 427
428 //Get primary vertex
bef31448 429 Double_t errorsprimvert[3];
2257f27e 430 Double_t primaryVertex[3];
431 event->GetVertex()->GetXYZ(primaryVertex);
432 event->GetVertex()->GetSigmaXYZ(errorsprimvert);
433
bef31448 434 if(errorsprimvert[0]==0 || errorsprimvert[1]==0){
2257f27e 435 // Warning("FindTracks","Set errors on vertex positions x and y at 0.005");
436 errorsprimvert[0]=0.005;
437 errorsprimvert[1]=0.005;
bef31448 438 }
bef31448 439
440 //Fill array with cluster indices for each module
4e05ab9a 441 if(!fTable){
442 fTable = new AliITSclusterTable(fGeom,this,primaryVertex);
443 fTable->FillArray(fITSclusters);
444 fTable->FillArrayCoorAngles();
627b6db6 445 }
bef31448 446
447 Int_t * firstmod = new Int_t[fGeom->GetNlayers()];
448 for(Int_t i=0;i<fGeom->GetNlayers();i++){
449 firstmod[i]=fGeom->GetModuleIndex(i+1,1,1);
13918578 450 }
bef31448 451 // firstmod [i] number of the first module in the ITS layer i.
452
453
627b6db6 454 AliITSlayer &layer=fgLayers[0];
bef31448 455 Int_t ntrack=0;
627b6db6 456 Int_t dim=layer.GetNumberOfClusters();
bef31448 457 //loop on the different windows
458 for(Int_t nloop=0;nloop<fNloop;nloop++){
459 for(Int_t ncl=0;ncl<dim;ncl++){ //loop starting from layer 0
627b6db6 460
bef31448 461 ResetForFinding();
462 Int_t pflag=0;
463 AliITSclusterV2* cl = (AliITSclusterV2*)layer.GetCluster(ncl);
464 if(cl==0) continue;
465 if(cl->IsUsed()==1) continue;
627b6db6 466 if(cl->TestBit(kSAflag)==kTRUE) continue;
cfe729e0 467 if (cl->GetQ()<=0) continue;
627b6db6 468
bef31448 469 fPhic = fTable->GetPhiCluster(0,ncl);
470 fLambdac = fTable->GetLambdaCluster(0,ncl);
cfe729e0 471
472 if (TMath::Abs(fLambdac)>0.26*TMath::Pi()) continue;
473
bef31448 474 fPhiEstimate = fPhic;
475 AliITStrackSA* trs = new AliITStrackSA();
476 fPoint1[0]=primaryVertex[0];
477 fPoint1[1]=primaryVertex[1];
478 fPoint2[0]=fTable->GetXCluster(0,ncl);
479 fPoint2[1]=fTable->GetYCluster(0,ncl);
480 Int_t * nn = new Int_t[fGeom->GetNlayers()];//counter for clusters on each layer
481 for(Int_t i=0;i<fGeom->GetNlayers();i++){ nn[i]=0;}
cfe729e0 482 nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 483
cfe729e0 484 nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 485 if(nn[1]>0){
486 pflag=1;
487 fPoint3[0] = fPointc[0];
488 fPoint3[1] = fPointc[1];
489 }
cfe729e0 490 nn[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 491 if(nn[1]==0 && nn[2]==0) pflag=0;
492 if(nn[2]!=0 && nn[1]!=0){ pflag=1; UpdatePoints();}
493 if(nn[2]!=0 && nn[1]==0){
494 pflag=1;
495 fPoint3[0]=fPointc[0];
496 fPoint3[1]=fPointc[1];
497 }
13918578 498
cfe729e0 499 nn[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 500 pflag=1;
501 if(nn[3]!=0) UpdatePoints();
cfe729e0 502 nn[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 503 pflag=1;
504 if(nn[4]!=0) UpdatePoints();
cfe729e0 505 nn[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 506
507
508 Int_t layOK=0;
509 Int_t numberofpoints;
2257f27e 510 if(fSixPoints) numberofpoints=6; //check of the candidate track
bef31448 511 else numberofpoints=5; //if track is good (with the required number
512 for(Int_t nnp=0;nnp<fGeom->GetNlayers();nnp++){ //of points) it is written on file
513 if(nn[nnp]!=0) layOK+=1;
514 }
515 if(layOK>=numberofpoints){
2257f27e 516 AliITStrackV2* tr2 = FitTrack(trs,primaryVertex,errorsprimvert);
bef31448 517 if(tr2==0){
518 Int_t nct = trs->GetNumberOfClustersSA();
519 while(nct--){
520 Int_t index = trs->GetClusterIndexSA(nct);
521 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
627b6db6 522 if(kl->TestBit(kSAflag)==kTRUE) kl->ResetBit(kSAflag);
523
bef31448 524 }
4e05ab9a 525 continue;
bef31448 526 }
527
528 AliESDtrack outtrack;
529 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
530 event->AddTrack(&outtrack);
bef31448 531 ntrack++;
627b6db6 532 Int_t nct = tr2->GetNumberOfClusters();
bef31448 533 while(nct--){
534 Int_t index = tr2->GetClusterIndex(nct);
535 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
627b6db6 536 kl->SetBit(kSAflag);
537
538 }
539 }
bef31448 540 else{
627b6db6 541 Int_t nct = trs->GetNumberOfClustersSA();
542 while(nct--){
543 Int_t index = trs->GetClusterIndexSA(nct);
544 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
545 if(kl->TestBit(kSAflag)==kTRUE) kl->ResetBit(kSAflag);
546
4e05ab9a 547 }
bef31448 548 }
549 delete trs;
2257f27e 550 delete[] nn;
627b6db6 551
bef31448 552 }//end loop on clusters of layer1
627b6db6 553
bef31448 554 }//end loop2
555
627b6db6 556
557
bef31448 558 //if 5/6 points are required, second loop starting
559 //from second layer, to find tracks with point of
560 //layer 1 missing
561
2257f27e 562 if(!fSixPoints){
bef31448 563 // counter for clusters on each layer
564 Int_t * nn = new Int_t[fGeom->GetNlayers()-1];
565 for(Int_t nloop=0;nloop<fNloop;nloop++){
627b6db6 566 AliITSlayer &layer2=fgLayers[1];
bef31448 567 Int_t ncl2=layer2.GetNumberOfClusters();
568 while(ncl2--){ //loop starting from layer 2
569 ResetForFinding();
570 Int_t pflag=0;
571 AliITSclusterV2* cl = layer2.GetCluster(ncl2);
572 if(cl->IsUsed()==1) continue;
627b6db6 573 if(cl->TestBit(kSAflag)==kTRUE) continue;
bef31448 574 fPhic = fTable->GetPhiCluster(1,ncl2);
575 fLambdac = fTable->GetLambdaCluster(1,ncl2);
576 fPhiEstimate = fPhic;
577 AliITStrackSA* trs = new AliITStrackSA();
578 fPoint1[0]=primaryVertex[0];
579 fPoint1[1]=primaryVertex[1];
580 fPoint2[0]=fTable->GetXCluster(1,ncl2);
581 fPoint2[1]=fTable->GetYCluster(1,ncl2);
582
583 for(Int_t kk=0;kk<fGeom->GetNlayers()-1;kk++)nn[kk] = 0;
584 for(Int_t kk=0;kk<fGeom->GetNlayers()-1;kk++){
585 nn[kk] = SearchClusters(kk+1,fPhiWin[nloop],fLambdaWin[nloop],
cfe729e0 586 trs,primaryVertex[2],pflag);
bef31448 587 if(nn[kk]==0)break;
588 if(kk>0){
589 UpdatePoints();
590 pflag = 1;
591 }
592 }
593 Int_t fl=0;
594 for(Int_t nnp=0;nnp<fGeom->GetNlayers()-1;nnp++){
595 if(nn[nnp]!=0) fl+=1;
596 }
597 if(fl>=5){ // 5/6
2257f27e 598 AliITStrackV2* tr2 = FitTrack(trs,primaryVertex,errorsprimvert);
bef31448 599 if(tr2==0){
627b6db6 600 Int_t nct = trs->GetNumberOfClustersSA();
bef31448 601 while(nct--){
602 Int_t index = trs->GetClusterIndexSA(nct);
603 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
627b6db6 604 if(kl->TestBit(kSAflag)==kTRUE) kl->ResetBit(kSAflag);
605
bef31448 606 }
4e05ab9a 607
bef31448 608 continue;
609 }
610
611 AliESDtrack outtrack;
612 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
613 event->AddTrack(&outtrack);
627b6db6 614 ntrack++;
bef31448 615 Int_t nct = tr2->GetNumberOfClusters();
616 while(nct--){
617 Int_t index = tr2->GetClusterIndex(nct);
618 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
619 if(kl==0) continue;
627b6db6 620 kl->SetBit(kSAflag);
621 }
bef31448 622 }
623 else{
624 Int_t nct = trs->GetNumberOfClustersSA();
625 while(nct--){
626 Int_t index = trs->GetClusterIndexSA(nct);
627 AliITSclusterV2* kl = (AliITSclusterV2*)GetCluster(index);
628 if(kl==0) continue;
627b6db6 629 if(kl->TestBit(kSAflag)==kTRUE) kl->ResetBit(kSAflag);
630
bef31448 631 }
632 }
633 delete trs;
634 }//end loop on clusters of layer2
13918578 635 }
bef31448 636 delete [] nn;
637 } //end opt="5/6"
13918578 638
bef31448 639 delete [] firstmod;
627b6db6 640 delete fTable;fTable=0;
bef31448 641 Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks());
2257f27e 642 return 0;
bef31448 643
644}
2257f27e 645
646
13918578 647//________________________________________________________________________
648
2257f27e 649AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex,Double_t *errorsprimvert){
13918578 650 //fit of the found track
651
13918578 652
037efb75 653 Int_t * firstmod = new Int_t[fGeom->GetNlayers()];
13918578 654 for(Int_t i=0;i<fGeom->GetNlayers();i++){
655 firstmod[i]=fGeom->GetModuleIndex(i+1,1,1);
656 }
13918578 657 AliITStrackV2* otrack2;
658 Int_t nclusters = tr->GetNumberOfClustersSA();
659 TObjArray** listlayer = new TObjArray*[fGeom->GetNlayers()];
660 for(Int_t i=0;i<fGeom->GetNlayers();i++){
661 listlayer[i] = new TObjArray(0,0);
662 }
663
664 TArrayI clind0(20);
665 TArrayI clind1(20);
666 TArrayI clind2(20);
667 TArrayI clind3(20);
668 TArrayI clind4(20);
669 TArrayI clind5(20);
670
037efb75 671 Int_t * nnn = new Int_t[fGeom->GetNlayers()];
13918578 672 for(Int_t i=0;i<fGeom->GetNlayers();i++)nnn[i]=0;
673
674 for(Int_t ncl=0;ncl<nclusters;ncl++){
675 Int_t index = tr->GetClusterIndexSA(ncl);
676 AliITSclusterV2* cl = (AliITSclusterV2*)GetCluster(index);
bef31448 677
627b6db6 678 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
13918578 679 Int_t lay = (index & 0xf0000000) >> 28;
680 if(lay==0) { listlayer[0]->AddLast(cl); clind0[nnn[0]]=index;nnn[0]++;}
681 if(lay==1) { listlayer[1]->AddLast(cl); clind1[nnn[1]]=index;nnn[1]++;}
682 if(lay==2) { listlayer[2]->AddLast(cl); clind2[nnn[2]]=index;nnn[2]++;}
683 if(lay==3) { listlayer[3]->AddLast(cl); clind3[nnn[3]]=index;nnn[3]++;}
684 if(lay==4) { listlayer[4]->AddLast(cl); clind4[nnn[4]]=index;nnn[4]++;}
685 if(lay==5) { listlayer[5]->AddLast(cl); clind5[nnn[5]]=index;nnn[5]++;}
686 }
037efb75 687 delete [] nnn;
13918578 688
689
037efb75 690 Int_t * end = new Int_t[fGeom->GetNlayers()];
13918578 691 for(Int_t i=0;i<fGeom->GetNlayers();i++){
692 if(listlayer[i]->GetEntries()==0) end[i]=1;
693 else end[i]=listlayer[i]->GetEntries();
694 }
695
696 for(Int_t l1=0;l1<end[0];l1++){//loop on layer 1
697 AliITSclusterV2* cl0 = (AliITSclusterV2*)listlayer[0]->At(l1);
698 TVector3** recp = new TVector3*[3];
699 TVector3** errs = new TVector3*[3];
700 recp[0] = new TVector3(primaryVertex[0],primaryVertex[1],primaryVertex[2]);
701 errs[0] = new TVector3(errorsprimvert[0],errorsprimvert[1],errorsprimvert[2]);
702 Double_t x1,y1,z1,sx1,sy1,sz1;
703 Double_t x2,y2,z2,sx2,sy2,sz2;
704 AliITSclusterV2* p1=0;
705 AliITSclusterV2* p2=0;
bef31448 706 Int_t index1=clind0[l1];
707 Int_t index2=0;
13918578 708 for(Int_t l2=0;l2<end[1];l2++){//loop on layer 2
bef31448 709 AliITSclusterV2* cl1 = (AliITSclusterV2*)listlayer[1]->At(l2);
710 index2=clind1[l2];
13918578 711 for(Int_t l3=0;l3<end[2];l3++){ //loop on layer 3
bef31448 712 AliITSclusterV2* cl2 = (AliITSclusterV2*)listlayer[2]->At(l3);
713
714 if(cl0==0 && cl1!=0) {
715 p2 = cl2;index1=clind2[l3];
716 p1=cl1;
717
718 }
719 if(cl0!=0 && cl1==0){
720 p1=cl0;
721 p2=cl2;index2=clind2[l3];
722 }
723 if(cl0!=0 && cl1!=0){
724 p1=cl0;
725 p2=cl1;
726 }
727 Int_t lay1=(index1 & 0xf0000000) >> 28;
728 Int_t cln1=(index1 & 0x0fffffff) >> 00;
729 Int_t lay2=(index2 & 0xf0000000) >> 28;
730 Int_t cln2=(index2 & 0x0fffffff) >> 00;
731 x1 = fTable->GetXCluster(lay1,cln1);
732 x2 = fTable->GetXCluster(lay2,cln2);
733 y1 = fTable->GetYCluster(lay1,cln1);
734 y2 = fTable->GetYCluster(lay2,cln2);
735 z1 = fTable->GetZCluster(lay1,cln1);
736 z2 = fTable->GetZCluster(lay2,cln2);
737 sx1 = fTable->GetXClusterError(lay1,cln1);
738 sx2 = fTable->GetXClusterError(lay2,cln2);
739 sy1 = fTable->GetYClusterError(lay1,cln1);
740 sy2 = fTable->GetYClusterError(lay2,cln2);
741 sz1 = fTable->GetZClusterError(lay1,cln1);
742 sz2 = fTable->GetZClusterError(lay2,cln2);
743 Double_t phi1 = fTable->GetPhiCluster(lay1,cln1);
744 Int_t module1 = p1->GetDetectorIndex()+firstmod[0];
13918578 745 recp[1] = new TVector3(x1,y1,z1);
bef31448 746 errs[1] = new TVector3(sx1,sy1,sz1);
747 recp[2] = new TVector3(x2,y2,z2);
748 errs[2] = new TVector3(sx2,sy2,sz2);
749
750 //fit on the Riemann sphere
751 Float_t seed1,seed2,seed3;
752 AliITSRiemannFit fit;
753 Int_t rf = fit.FitHelix(3,recp,errs,seed1,seed2,seed3); //this gives phi,tgl,curvature to start Kalman Filter
754 if(rf==0) continue;
755 Double_t phi=seed1;
756 Double_t tgl=seed2;
757
758 if(phi1>0){
759 if(seed1>-TMath::Pi() && seed1<-0.5*TMath::Pi()){
760 phi=seed1+1.5*TMath::Pi();
761 tgl=seed2;
762 }
763 if(seed1>-0.5*TMath::Pi() && seed1<0.5*TMath::Pi()){
764 phi=seed1+0.5*TMath::Pi();
765 tgl=(-1)*seed2;
766 }
767 if(seed1>0.5*TMath::Pi() && seed1<TMath::Pi()){
768 phi=seed1-0.5*TMath::Pi();
769 tgl=seed2;
770 }
771 }
772 if(phi1<0){
773 if(seed1>-TMath::Pi() && seed1<-0.5*TMath::Pi()){
774 phi=seed1+0.5*TMath::Pi();
775 tgl=(-1)*seed2;
776 }
777 if(seed1>-0.5*TMath::Pi() && seed1<0.5*TMath::Pi()){
778 phi=seed1-0.5*TMath::Pi();
779 tgl=seed2;
780 }
781 if(seed1>0.5*TMath::Pi() && seed1<TMath::Pi()){
782 phi=seed1-1.5*TMath::Pi();
783 tgl=(-1)*seed2;
784 }
785 }
786
13918578 787 Int_t layer,ladder,detector;
788 fGeom->GetModuleId(module1,layer,ladder,detector);
bef31448 789 Float_t yclu1 = p1->GetY();
790 Float_t zclu1 = p1->GetZ();
791 Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
792
793 for(Int_t l4=0;l4<end[3];l4++){ //loop on layer 4
794 AliITSclusterV2* cl3 = (AliITSclusterV2*)listlayer[3]->At(l4);
795 for(Int_t l5=0;l5<end[4];l5++){ //loop on layer 5
796 AliITSclusterV2* cl4 = (AliITSclusterV2*)listlayer[4]->At(l5);
797 for(Int_t l6=0;l6<end[5];l6++){ //loop on layer 6
798 AliITSclusterV2* cl5 = (AliITSclusterV2*)listlayer[5]->At(l6);
799 AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi,tgl,cv,1);
800
801 if(cl5!=0) trac->AddClusterV2(5,(clind5[l6] & 0x0fffffff)>>0);
802 if(cl4!=0) trac->AddClusterV2(4,(clind4[l5] & 0x0fffffff)>>0);
803 if(cl3!=0) trac->AddClusterV2(3,(clind3[l4] & 0x0fffffff)>>0);
804 if(cl2!=0) trac->AddClusterV2(2,(clind2[l3] & 0x0fffffff)>>0);
805 if(cl1!=0) trac->AddClusterV2(1,(clind1[l2] & 0x0fffffff)>>0);
806 if(cl0!=0) trac->AddClusterV2(0,(clind0[l1] & 0x0fffffff)>>0);
807
808 //fit with Kalman filter using AliITStrackerV2::RefitAt()
809
810 AliITStrackV2* ot = new AliITStrackV2(*trac);
811
812 ot->ResetCovariance();
813 ot->ResetClusters();
814
815 if(RefitAt(49.,ot,trac)){ //fit from layer 1 to layer 6
816
817 otrack2 = new AliITStrackV2(*ot);
818 otrack2->ResetCovariance();
819 otrack2->ResetClusters();
820 //fit from layer 6 to layer 1
4e05ab9a 821 if(RefitAt(3.7,otrack2,ot)) fListOfTracks->AddLast(otrack2);
bef31448 822
823 }
824
825 delete ot;
826 delete trac;
827 }//end loop layer 6
828 }//end loop layer 5
829 }//end loop layer 4
830
831 for(Int_t i=1;i<3;i++){
832 delete recp[i];
833 delete errs[i];
834 }
13918578 835 }//end loop layer 3
bef31448 836 }//end loop layer 2
13918578 837 delete recp[0];
838 delete errs[0];
839 delete[] recp;
840 delete[] errs;
841 }//end loop layer 1
842
037efb75 843 delete [] end;
844
4e05ab9a 845 Int_t dim=fListOfTracks->GetEntries();
13918578 846 if(dim==0){
13918578 847 for(Int_t i=0;i<fGeom->GetNlayers();i++){
848 delete listlayer[i];
849 }
850 delete listlayer;
851 return 0;
852 }
853
4e05ab9a 854 AliITStrackV2* otrack =(AliITStrackV2*)FindTrackLowChiSquare(fListOfTracks,dim);
13918578 855
856 if(otrack==0) return 0;
037efb75 857 Int_t * indexc = new Int_t[fGeom->GetNlayers()];
13918578 858 for(Int_t i=0;i<fGeom->GetNlayers();i++) indexc[i]=0;
859 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
860 indexc[nind] = otrack->GetClusterIndex(nind);
861 }
862 AliITSclusterV2* cl0 = (AliITSclusterV2*)GetCluster(indexc[0]);
863 AliITSclusterV2* cl1 = (AliITSclusterV2*)GetCluster(indexc[1]);
864 AliITSclusterV2* cl2 = (AliITSclusterV2*)GetCluster(indexc[2]);
865 AliITSclusterV2* cl3 = (AliITSclusterV2*)GetCluster(indexc[3]);
866 AliITSclusterV2* cl4 = (AliITSclusterV2*)GetCluster(indexc[4]);
867 Int_t labl[3]={-1,-1,-1};
868 if(otrack->GetNumberOfClusters()==fGeom->GetNlayers()){
869 AliITSclusterV2* cl5 = (AliITSclusterV2*)GetCluster(indexc[5]);
870 labl[0]=cl5->GetLabel(0);
871 labl[1]=cl5->GetLabel(1);
872 labl[2]=cl5->GetLabel(2);
873 }
037efb75 874 delete [] indexc;
13918578 875 if(otrack->GetNumberOfClusters()==(fGeom->GetNlayers()-1)){
876 labl[0]=-1;
877 labl[1]=-1;
878 labl[2]=-1;
879 }
880 Int_t numberofpoints;
2257f27e 881 if(fSixPoints) numberofpoints=6;
13918578 882 else numberofpoints=5;
883 Int_t label = Label(cl0->GetLabel(0),cl1->GetLabel(0),
bef31448 884 cl2->GetLabel(0),cl3->GetLabel(0),
885 cl4->GetLabel(0),labl[0],
886 cl0->GetLabel(1),cl1->GetLabel(1),
887 cl2->GetLabel(1),cl3->GetLabel(1),
888 cl4->GetLabel(1),labl[1],
889 cl0->GetLabel(2),cl1->GetLabel(2),
890 cl2->GetLabel(2),cl3->GetLabel(2),
891 cl4->GetLabel(2),labl[2],numberofpoints);
13918578 892
893 otrack->SetLabel(label);
13918578 894 for(Int_t i=0;i<fGeom->GetNlayers();i++){
895 delete listlayer[i];
896 }
897 delete listlayer;
037efb75 898 delete [] firstmod;
13918578 899 return otrack;
900
901}
902
bef31448 903//_______________________________________________________________________
4e05ab9a 904void AliITStrackerSA::UseFoundTracksV2(Int_t evnum,TTree* treev2){
bef31448 905 // Marks as used clusters belonging to tracks found with V2 TPC+ITS tracking
906 //(or AliITStrackV2 tracks found with function FindTracks of this class)
4e05ab9a 907
13918578 908
bef31448 909 //Get primary vertex
910 if(fVertexer){
911 if(fVert)delete fVert;
912 fVert = fVertexer->FindVertexForCurrentEvent(evnum);
913 }
914 else {
915 gAlice->GetEvent(evnum);
916 if(!fVert){
917 Fatal("FindTracks","Vertex is missing\n");
918 return;
919 }
920 }
921 Double_t primaryVertex[3];
922 fVert->GetXYZ(primaryVertex);
13918578 923
bef31448 924 if(!fTable){
925 fTable = new AliITSclusterTable(fGeom,this,primaryVertex);
2257f27e 926 fTable->FillArray(fITSclusters);
927 fTable->FillArrayCoorAngles();
bef31448 928 }
bef31448 929
930 TBranch* bra = (TBranch*)treev2->GetBranch("tracks");
931 if(!bra) Warning("UseFoundTracksV2","No branch for track tree");
932 AliITStrackV2* ttrrt = new AliITStrackV2;
933 bra->SetAddress(&ttrrt);
934
935 for(Int_t nj=0;nj<treev2->GetEntries();nj++){
936 treev2->GetEvent(nj);
937 Int_t ncl = ttrrt->GetNumberOfClusters();
938 for(Int_t k=0;k<ncl;k++){
939 Int_t index = ttrrt->GetClusterIndex(k);
940 AliITSclusterV2* clui = (AliITSclusterV2*)GetCluster(index);
627b6db6 941 if(clui->IsUsed()==0) clui->Use();
942
bef31448 943 }
944 }
945 delete ttrrt;
13918578 946
947}
948
bef31448 949//_______________________________________________________________________
4e05ab9a 950void AliITStrackerSA::UseFoundTracksV2(AliESD *event){
bef31448 951 // Marks as used clusters belonging to tracks found with V2 TPC+ITS tracking
952
953 //Get primary vertex
4e05ab9a 954
bef31448 955 Double_t primaryVertex[3];
4e05ab9a 956 event->GetVertex()->GetXYZ(primaryVertex);
13918578 957
bef31448 958 if(!fTable){
959 fTable = new AliITSclusterTable(fGeom,this,primaryVertex);
2257f27e 960 fTable->FillArray(fITSclusters);
961 fTable->FillArrayCoorAngles();
bef31448 962 }
4e05ab9a 963
bef31448 964 Int_t ntracks = event->GetNumberOfTracks();
965 while (ntracks--) {
966 AliESDtrack *esd=event->GetTrack(ntracks);
967 if ((esd->GetStatus()&
968 AliESDtrack::kITSin|AliESDtrack::kTPCin)==0) continue;
969 UInt_t idx[6];
970 Int_t ncl = esd->GetITSclusters(idx);
971 for(Int_t clu=0; clu<ncl; clu++){
972 AliITSclusterV2* cl = (AliITSclusterV2*)GetCluster(idx[clu]);
973 if(cl->IsUsed()==0) cl->Use();
974 }
975 }
976
977 Info("UseFoundTracksV2","Clusters of tracks prolonged from TPC deleted");
978
979
980}
981
cfe729e0 982/*
bef31448 983//_______________________________________________________
cfe729e0 984Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t zvertex,Int_t pflag){
13918578 985 //function used to to find the clusters associated to the track
986 Int_t nc=0;
987 AliITSlayer &lay = fgLayers[layer];
037efb75 988 Int_t * firstmod = new Int_t[fGeom->GetNlayers()];
13918578 989 for(Int_t i=0;i<fGeom->GetNlayers();i++){
990 firstmod[i]=fGeom->GetModuleIndex(i+1,1,1);
991 }
992 if(pflag==1){
993
994 Float_t cx1,cx2,cy1,cy2;
995 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
996 Int_t fun = FindIntersection(fCoef1,fCoef2,fCoef3,-(lay.GetR()*lay.GetR()),cx1,cy1,cx2,cy2);
2257f27e 997 if(fun==0) {
998 delete[] firstmod;
999 return 0;
1000 }
627b6db6 1001
13918578 1002 Double_t fi1 =TMath::ATan2(cy1,cx1);
1003 Double_t fi2 =TMath::ATan2(cy2,cx2);
1004 fPhiEstimate = ChoosePoint(fi1,fi2,fPhic);
1005 }
1006
1007 Double_t zed = TMath::Tan(fLambdac)*lay.GetR()+zvertex;
1008 Double_t zed1 = TMath::Tan(fLambdac+lambdawindow)*lay.GetR()+zvertex;
1009 Double_t zed2 = TMath::Tan(fLambdac-lambdawindow)*lay.GetR()+zvertex;
1010
1011 Double_t fi = fPhiEstimate;
2257f27e 1012 Int_t nmod = lay.FindDetectorIndex(fi,zed);
1013 if (nmod < 0) {
1014 delete[] firstmod;
1015 return 0;
1016 }
1017 nmod += firstmod[layer];
13918578 1018
1019 Int_t nm[8]={0,0,0,0,0,0,0,0};
2257f27e 1020 nm[0] = lay.FindDetectorIndex(fi+phiwindow,zed);
1021 nm[1] = lay.FindDetectorIndex(fi-phiwindow,zed);
4e05ab9a 1022 nm[2] = lay.FindDetectorIndex(fi,zed1);
1023 nm[3] = lay.FindDetectorIndex(fi,zed2);
1024 nm[4] = lay.FindDetectorIndex(fi+phiwindow,zed1);
1025 nm[5] = lay.FindDetectorIndex(fi-phiwindow,zed1);
1026 nm[6] = lay.FindDetectorIndex(fi+phiwindow,zed2);
1027 nm[7] = lay.FindDetectorIndex(fi-phiwindow,zed2);
1028
13918578 1029
13918578 1030 Int_t nn=0;
cfe729e0 1031 TArrayI* array =(TArrayI*)fTable->GetListOfClusters(nmod);
4e05ab9a 1032 TArrayI* listc = new TArrayI(array->GetSize());
13918578 1033 for(Int_t i=0;i<array->GetSize();i++){
1034 Int_t in=(Int_t)array->At(i);
4e05ab9a 1035 listc->AddAt(in,nn);
13918578 1036 nn++;
1037 }
627b6db6 1038
4e05ab9a 1039 Int_t k=0;
1040 Int_t val;
1041 while(k<8){
1042 for(Int_t h=k+1;h<8;h++){
1043 if(nm[k]>nm[h]){
1044 val=nm[k];
1045 nm[k]=nm[h];
1046 nm[h]=val;
1047 }
1048
1049 }
1050 k++;
1051 }
1052
1053 Int_t value=-5;
1054
13918578 1055 for(Int_t ii=0;ii<8;ii++){
4e05ab9a 1056 if(nm[ii]!=value && nm[ii]!=nmod && nm[ii]>=0){
cfe729e0 1057 TArrayI* ar =(TArrayI*)fTable->GetListOfClusters(nm[ii]+firstmod[layer]);
4e05ab9a 1058 listc->Set(listc->GetSize()+ar->GetSize());
13918578 1059 for(Int_t j=0;j<ar->GetSize();j++){
4e05ab9a 1060 Int_t in=(Int_t)ar->At(j);
1061 listc->AddAt(in,nn);
1062 nn++;
1063 value=nm[ii];
13918578 1064 }
1065 }
1066 }
4e05ab9a 1067
1068
1069 for(Int_t i=0;i<listc->GetSize();i++){
1070 Int_t index = (Int_t)listc->At(i);
13918578 1071 AliITSclusterV2* cllay = lay.GetCluster(index);
1072 if(cllay==0) continue;
627b6db6 1073 if(cllay->IsUsed()==1) continue;
1074 if(cllay->TestBit(kSAflag)==kTRUE) continue;
bef31448 1075 Double_t phi = fTable->GetPhiCluster(layer,index);
1076 Double_t lambda= fTable->GetLambdaCluster(layer,index);
1077
13918578 1078 if(TMath::Abs(fLambdac-lambda)<lambdawindow &&
1079 TMath::Abs(fPhiEstimate-phi)<phiwindow){
1080 nc+=1;
1081 fLambdac = lambda;
4e05ab9a 1082 if(trs->GetNumberOfClustersSA()==15){
2257f27e 1083 delete[] firstmod;
4e05ab9a 1084 delete listc;
bef31448 1085 return 0;
13918578 1086 }
1087 trs->AddClusterSA(layer,index);
627b6db6 1088 cllay->SetBit(kSAflag);
13918578 1089 fPhiEstimate=phi;
bef31448 1090 fPointc[0]=fTable->GetXCluster(layer,index);
1091 fPointc[1]=fTable->GetYCluster(layer,index);
13918578 1092 }
1093
1094 }
4e05ab9a 1095 delete listc;
037efb75 1096 delete [] firstmod;
13918578 1097 return nc;
1098
1099}
cfe729e0 1100*/
1101
1102
1103//_______________________________________________________
1104Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t zvertex,Int_t pflag){
1105 //function used to to find the clusters associated to the track
1106 Int_t nc=0;
1107 AliITSlayer &lay = fgLayers[layer];
1108 Double_t r=lay.GetR(),tgl=TMath::Tan(fLambdac);
1109
1110 if(pflag==1){
1111 Float_t cx1,cx2,cy1,cy2;
1112 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
1113 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
1114 return 0;
1115 Double_t fi1=TMath::ATan2(cy1,cx1);
1116 Double_t fi2=TMath::ATan2(cy2,cx2);
1117 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
1118 }
13918578 1119
cfe729e0 1120 Double_t dz=r*lambdawindow*TMath::Sqrt(1+tgl*tgl) + 0.3*TMath::Abs(tgl);
1121 Double_t zmax=r*tgl + zvertex + dz;
1122 Double_t zmin=r*tgl + zvertex - dz;
1123
1124 Int_t ncl=lay.GetNumberOfClusters();
1125 for (Int_t index=lay.FindClusterIndex(zmin); index<ncl; index++) {
1126 AliITSclusterV2 *c=lay.GetCluster(index);
1127 if (c->IsUsed()) continue;
1128 if (c->GetQ()<=0) continue;
1129 if (c->TestBit(kSAflag)==kTRUE) continue;
1130 if (c->GetZ() > zmax) break;
1131 Double_t phi =fTable->GetPhiCluster(layer,index);
1132 Double_t lambda=fTable->GetLambdaCluster(layer,index);
1133
1134 if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue;
1135 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
1136
1137 if(trs->GetNumberOfClustersSA()==15) return 0;
1138
1139 trs->AddClusterSA(layer,index);
1140 nc++;
1141 fLambdac=lambda;
1142 fPhiEstimate=phi;
1143 fPointc[0]=fTable->GetXCluster(layer,index);
1144 fPointc[1]=fTable->GetYCluster(layer,index);
1145
1146 c->SetBit(kSAflag);
1147 }
1148 return nc;
1149}
13918578 1150
13918578 1151
bef31448 1152//________________________________________________________________
1153void AliITStrackerSA::UpdatePoints(){
1154 //update of points for the estimation of the curvature
13918578 1155
627b6db6 1156 //fPoint1[0]=fPoint2[0];
1157 //fPoint1[1]=fPoint2[1];
bef31448 1158 fPoint2[0]=fPoint3[0];
1159 fPoint2[1]=fPoint3[1];
1160 fPoint3[0]=fPointc[0];
1161 fPoint3[1]=fPointc[1];
13918578 1162
1163
13918578 1164}
13918578 1165
13918578 1166//___________________________________________________________________
1167Int_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){
1168
1169 //given (x,y) of three recpoints (in global coordinates)
1170 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
1171
1172 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1173 if(den==0) return 0;
1174 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1175 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1176 c = -x1*x1-y1*y1-a*x1-b*y1;
1177 return 1;
1178 }
1179//__________________________________________________________________________
1180 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){
1181
1182 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
1183 //c2 is -rlayer*rlayer
1184
1185 if(a1==0) return 0;
1186 Float_t m = c2-c1;
1187 Float_t aA = (b1*b1)/(a1*a1)+1;
1188 Float_t bB = (-2*m*b1/(a1*a1));
1189 Float_t cC = c2+(m*m)/(a1*a1);
1190 if((bB*bB-4*aA*cC)<0) return 0;
1191
1192 y1 = (-bB+TMath::Sqrt(bB*bB-4*aA*cC))/(2*aA);
1193 y2 = (-bB-TMath::Sqrt(bB*bB-4*aA*cC))/(2*aA);
1194 x1 = (c2-c1-b1*y1)/a1;
1195 x2 = (c2-c1-b1*y2)/a1;
1196
1197 return 1;
1198}
1199//____________________________________________________________________
1200Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t
1201x2,Double_t y2,Double_t x3,Double_t y3){
1202
1203 //calculates the curvature of track
1204 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1205 if(den==0) return 0;
1206 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1207 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1208 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
1209 Double_t xc=-a/2.;
1210
1211 if((a*a+b*b-4*c)<0) return 0;
1212 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
1213 if(rad==0) return 0;
1214
1215 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
1216 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
1217 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
1218 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
1219
1220 return 1/rad;
1221
1222}
1223//____________________________________________________________________
1224Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
1225
1226 //Returns the point closest to pp
1227
1228 Double_t diff1 = p1-pp;
1229 Double_t diff2 = p2-pp;
1230
1231 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
1232 else fPhiEstimate=p2;
1233 return fPhiEstimate;
1234
1235}
1236
1237
1238//_________________________________________________________________
1239AliITStrackV2* AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const {
1240 // returns track with lowes chi square
1241 if(dim==1){
1242 AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(0);
1243 return trk;
1244 }
1245 if(dim==0) return 0;
037efb75 1246 Double_t * chi2 = new Double_t[dim];
1247 Int_t * index = new Int_t[dim];
13918578 1248 for(Int_t i=0;i<dim;i++){
1249 AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(i);
1250 chi2[i]=trk->GetChi2();
1251 index[i]=i;
1252 }
1253
1254 Int_t w=0;Double_t value;
1255 Int_t lp;
1256 while(w<dim){
1257 for(Int_t j=w+1;j<dim;j++){
1258 if(chi2[w]<chi2[j]){
bef31448 1259 value=chi2[w];
1260 chi2[w]=chi2[j];
1261 chi2[j]=value;
1262 lp=index[w];
1263 index[w]=index[j];
1264 index[j]=lp;
13918578 1265 }
1266 }
1267 w++;
1268 }
1269
1270 AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(index[dim-1]);
037efb75 1271 delete [] chi2;
1272 delete [] index;
13918578 1273 return trk;
1274
1275}
1276
1277//__________________________________________________________
1278Int_t AliITStrackerSA::FindLabel(Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5, Int_t l6){
1279
1280 //function used to determine the track label
1281
1282 Int_t lb[6] = {l1,l2,l3,l4,l5,l6};
1283 Int_t aa[6]={1,1,1,1,1,1};
1284 Int_t ff=0;
1285 Int_t ll=0;
1286 Int_t k=0;Int_t w=0;Int_t num=6;
1287 if(lb[5]==-1) num=5;
1288
1289 while(k<num){
1290
1291 for(Int_t i=k+1;i<num;i++){
1292
1293 if(lb[k]==lb[i] && aa[k]!=0){
1294
1295 aa[k]+=1;
1296 aa[i]=0;
1297 }
1298 }
1299 k++;
1300 }
1301
1302 while(w<num){
1303
1304 for(Int_t j=0;j<6;j++){
1305 if(aa[w]<aa[j]){
1306 ff=aa[w];
1307 aa[w]=aa[j];
1308 aa[j]=ff;
1309 ll=lb[w];
1310 lb[w]=lb[j];
1311 lb[j]=ll;
1312 }
1313 }
1314 w++;
1315 }
1316 if(num==6) return lb[5];
1317 else return lb[4];
1318}
1319
1320//_____________________________________________________________________________
1321Int_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,
1322Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t numberofpoints){
1323
1324
1325 //function used to assign label to the found track. If track is fake, the label is negative
1326
1327 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1328 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1329 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1330 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1331 Int_t lflag=0;Int_t num=6;
1332 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1333
1334 for(Int_t i=0;i<num;i++){
1335 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1336 }
1337
1338 if(lflag>=numberofpoints) return ll;
1339 else return -ll;
1340
1341
1342}
1343
1344//_____________________________________________________________________________
1345void AliITStrackerSA::SetWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1346 // Set sizes of the phi and lambda windows used for track finding
1347 fNloop = n;
1348 if(phi){ // user defined values
1349 fPhiWin = new Double_t[fNloop];
1350 fLambdaWin = new Double_t[fNloop];
1351 for(Int_t k=0;k<fNloop;k++){
1352 fPhiWin[k]=phi[k];
1353 fLambdaWin[k]=lam[k];
1354 }
1355 }
1356 else { // default values
627b6db6 1357
1358 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
bef31448 1359 0.005,0.0053,0.0055,
1360 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1361 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
627b6db6 1362 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1363 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1364 0.005,0.005,0.006,
1365 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1366 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1367 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
bef31448 1368
627b6db6 1369 if(fNloop!=33){
1370 fNloop = 33;
13918578 1371 }
627b6db6 1372
1373
13918578 1374 fPhiWin = new Double_t[fNloop];
1375 fLambdaWin = new Double_t[fNloop];
1376
1377 for(Int_t k=0;k<fNloop;k++){
1378 fPhiWin[k]=phid[k];
1379 fLambdaWin[k]=lambdad[k];
1380 }
1381
1382 }
1383
1384}
13918578 1385