Possibility to reconstruct tracks with 1 point + vertex, and possibility to reuse...
[u/mrichter/AliRoot.git] / ITS / AliITStrackerSA.cxx
CommitLineData
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}
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
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
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
261//____________________________________________________________________________
13918578 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();
5a03f353 318 if(AliITSReconstructor::GetRecoParam()->GetSAUseAllClusters()==kFALSE) {
319 while (nentr--) {
320 AliESDtrack *track=event->GetTrack(nentr);
321 if (track->GetStatus()&AliESDtrack::kITSin==AliESDtrack::kITSin){
322 Int_t idx[12];
323 Int_t ncl = track->GetITSclusters(idx);
324 for(Int_t k=0;k<ncl;k++){
325 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
326 cll->SetBit(kSAflag);
327 }
ebda3140 328 }
329 }
330 }
331 //Get primary vertex
332 Double_t primaryVertex[3];
333 event->GetVertex()->GetXYZ(primaryVertex);
334 //Creates TClonesArray with clusters for each layer. The clusters already used
335 //by AliITStrackerMI are not considered
336 Int_t nclusters[6]={0,0,0,0,0,0};
337 Int_t dmar[6]={0,0,0,0,0,0};
338 if (fCluLayer == 0) {
339 fCluLayer = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
340 fCluCoord = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
341 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
342 fCluLayer[i]=0;
343 fCluCoord[i]=0;
344 }
345 }
346 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
347 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
348 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
349 AliITSlayer &layer=fgLayers[i];
25be2b21 350 if (!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) {
351 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
352 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
353 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
354 if(cls->GetQ()==0) continue; //fake clusters dead zones
355 nclusters[i]++;
356 }
ebda3140 357 }
358 dmar[i]=0;
359 delete fCluLayer[i];
360 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
361 delete fCluCoord[i];
362 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
363 }
364
365 for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
366 TClonesArray &clulay = *fCluLayer[ilay];
367 TClonesArray &clucoo = *fCluCoord[ilay];
368 AliITSlayer &layer=fgLayers[ilay];
25be2b21 369 if (!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilay)) {
370 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
371 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
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;
377 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
378 GetCoorErrors(cls,sx,sy,sz);
379 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
380 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
381 dmar[ilay]++;
382 }
ebda3140 383 }
384 }
7e5bf5af 385
ebda3140 386 Int_t minNPoints = (fSixPoints ? AliITSgeomTGeo::GetNLayers() : AliITSgeomTGeo::GetNLayers()-1);
387 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
388 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) {
389 minNPoints--;
390 }
391 }
7e5bf5af 392
393
ebda3140 394 Int_t ntrack=0;
395 //loop on the different windows
396 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()];//counter for clusters on each layer
397 for(Int_t nloop=0;nloop<fNloop;nloop++){
398 for(Int_t ncl=0;ncl<fCluLayer[0]->GetEntries();ncl++){ //loop starting from layer 0
399
400 ResetForFinding();
401 Int_t pflag=0;
402
403 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[0]->At(ncl);
404
405 if(!cl) continue;
406 if (cl->GetQ()<=0) continue;
407
408 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(0,ncl);
409 fPhic = arr->GetPhi();
410 fLambdac = arr->GetLambda();
411 if (TMath::Abs(fLambdac)>0.26*TMath::Pi()) continue;
412 fPhiEstimate = fPhic;
413 AliITStrackSA* trs = new AliITStrackSA();
414 fPoint1[0]=primaryVertex[0];
415 fPoint1[1]=primaryVertex[1];
416
417
418 fPoint2[0]=arr->GetX();
419 fPoint2[1]=arr->GetY();
420 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ nn[i]=0;}
421 nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
422 nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 423 if(nn[1]>0){
424 pflag=1;
425 fPoint3[0] = fPointc[0];
426 fPoint3[1] = fPointc[1];
427 }
cfe729e0 428 nn[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 429 if(nn[1]==0 && nn[2]==0) pflag=0;
430 if(nn[2]!=0 && nn[1]!=0){ pflag=1; UpdatePoints();}
431 if(nn[2]!=0 && nn[1]==0){
432 pflag=1;
433 fPoint3[0]=fPointc[0];
434 fPoint3[1]=fPointc[1];
435 }
13918578 436
cfe729e0 437 nn[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 438 pflag=1;
439 if(nn[3]!=0) UpdatePoints();
cfe729e0 440 nn[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 441 pflag=1;
442 if(nn[4]!=0) UpdatePoints();
cfe729e0 443 nn[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 444
445
446 Int_t layOK=0;
2755f080 447 //check of the candidate track
448 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers();nnp++) {
bef31448 449 if(nn[nnp]!=0) layOK+=1;
450 }
7e5bf5af 451
5a03f353 452 if(layOK>=minNPoints) {
2755f080 453 AliITStrackV2* tr2 = 0;
ebda3140 454 tr2 = FitTrack(trs,primaryVertex);
2755f080 455 if(!tr2) continue;
7e5bf5af 456
bef31448 457 AliESDtrack outtrack;
458 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
459 event->AddTrack(&outtrack);
bef31448 460 ntrack++;
bef31448 461 }
462 delete trs;
7e5bf5af 463 }//end loop on clusters of layer1
7e5bf5af 464 //end loop2
ebda3140 465 }
2755f080 466
ebda3140 467 delete[] nn;
2755f080 468
7e5bf5af 469
ebda3140 470 minNPoints--;
7e5bf5af 471
ebda3140 472 //if 5/6 points are required, second loop starting
473 //from second layer (SPD2), to find tracks with point of
474 //layer 1 missing
475 if(!fSixPoints) {
476 //printf("looking from SPD2\n");
477 // counter for clusters on each layer
478 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-1];
479 for(Int_t nloop=0;nloop<fNloop;nloop++){
480 Int_t ncl2=fCluLayer[1]->GetEntries();
481 while(ncl2--){ //loop starting from layer 2
482 ResetForFinding();
483 Int_t pflag=0;
484 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[1]->At(ncl2);
485
486 if(!cl) continue;
487 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(1,ncl2);
488 fPhic = arr->GetPhi();
489 fLambdac = arr->GetLambda();
490 fPhiEstimate = fPhic;
491
492 AliITStrackSA* trs = new AliITStrackSA();
493 fPoint1[0]=primaryVertex[0];
494 fPoint1[1]=primaryVertex[1];
495
496 fPoint2[0]=arr->GetX();
497 fPoint2[1]=arr->GetY();
498 for(Int_t kk=0;kk<AliITSgeomTGeo::GetNLayers()-1;kk++)nn[kk] = 0;
499 nn[0] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],
500 trs,primaryVertex[2],pflag);
501 nn[1] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],
502 trs,primaryVertex[2],pflag);
503 if(nn[1]!=0){
504 pflag=1;
505 fPoint3[0]=fPointc[0];
506 fPoint3[1]=fPointc[1];
507 }
508 nn[2]= SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],
509 trs,primaryVertex[2],pflag);
510 if(nn[2]!=0){
511 pflag=1;
512 UpdatePoints();
513 }
514 nn[3]= SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],
515 trs,primaryVertex[2],pflag);
516 if(nn[3]!=0){
517 pflag=1;
518 UpdatePoints();
519 }
520 nn[4]=SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],
521 trs,primaryVertex[2],pflag);
522
5a03f353 523 Int_t layOK=0;
ebda3140 524 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-1;nnp++){
5a03f353 525 if(nn[nnp]!=0) layOK+=1;
ebda3140 526 }
5a03f353 527 if(layOK>=minNPoints){ // 5/6
ebda3140 528 AliITStrackV2* tr2 = 0;
529 tr2 = FitTrack(trs,primaryVertex);
530 if(!tr2) continue;
531
532 AliESDtrack outtrack;
533 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
534 event->AddTrack(&outtrack);
535 ntrack++;
536
537 }
538
bef31448 539 delete trs;
540 }//end loop on clusters of layer2
ebda3140 541 }
542
543 delete [] nn;
544 } //end opt="5/6"
545
546 // search for tracks starting from SPD2, SDD1, SDD2, SSD2
547 // for cosmics (A. Dainese 31.07.07)
548 if(fOuterStartLayer>0) {
549 for(Int_t innLay=1; innLay<=fOuterStartLayer; innLay++) {
550 //printf("Searching from layer %d outward\n",innLay);
551 minNPoints=AliITSgeomTGeo::GetNLayers()-innLay;
552 for(Int_t i=innLay;i<AliITSgeomTGeo::GetNLayers();i++)
553 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i))
554 minNPoints--;
555 // counter for clusters on each layer
556 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-innLay];
557 for(Int_t nloop=0;nloop<fNloop;nloop++){
558 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
559 while(nclInnLay--){ //loop starting from layer innLay
560 ResetForFinding();
561 Int_t pflag=0;
562 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay);
563
564 if(!cl) continue;
565 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay);
566 fPhic = arr->GetPhi();
567 fLambdac = arr->GetLambda();
568 fPhiEstimate = fPhic;
569
570 AliITStrackSA* trs = new AliITStrackSA();
571 fPoint1[0]=primaryVertex[0];
572 fPoint1[1]=primaryVertex[1];
573 fPoint2[0]=arr->GetX();
574 fPoint2[1]=arr->GetY();
575
576 Int_t kk;
577 for(kk=0;kk<AliITSgeomTGeo::GetNLayers()-innLay;kk++) nn[kk] = 0;
578
579 kk=0;
580 nn[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
b8ed1a92 581 trs,primaryVertex[2],pflag);
ebda3140 582 for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) {
583 kk++;
584 nn[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
585 trs,primaryVertex[2],pflag);
586 if(nn[kk]!=0){
587 pflag=1;
588 if(kk==1) {
589 fPoint3[0]=fPointc[0];
590 fPoint3[1]=fPointc[1];
591 } else {
592 UpdatePoints();
593 }
594 }
595 }
596
5a03f353 597 Int_t layOK=0;
ebda3140 598 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
5a03f353 599 if(nn[nnp]!=0) layOK+=1;
ebda3140 600 }
5a03f353 601 if(layOK>=minNPoints){
ebda3140 602 AliITStrackV2* tr2 = 0;
603 tr2 = FitTrack(trs,primaryVertex);
604 if(!tr2) continue;
605
606
607 AliESDtrack outtrack;
608 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
609 event->AddTrack(&outtrack);
610 ntrack++;
611
612 }
613
614 delete trs;
615 }//end loop on clusters of innLay
616 } //end loop on window sizes
617
618 delete [] nn;
619 } //end loop on innLay
620 } //end if(fOuterStartLayer>0)
621
5a03f353 622
623 // search for 1-point tracks, only for cosmics
624 // (A.Dainese 21.03.08)
625 if(AliITSReconstructor::GetRecoParam()->GetSAOnePointTracks() &&
626 TMath::Abs(event->GetMagneticField())<0.01) {
627 for(Int_t innLay=0; innLay<=fOuterStartLayer; innLay++) {
628 // counter for clusters on each layer
629 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-innLay];
630 for(Int_t nloop=0;nloop<fNloop;nloop++){
631 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
632 while(nclInnLay--){ //loop starting from layer innLay
633 ResetForFinding();
634 Int_t pflag=0;
635 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay);
636
637 if(!cl) continue;
638 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay);
639 fPhic = arr->GetPhi();
640 fLambdac = arr->GetLambda();
641 fPhiEstimate = fPhic;
642
643 AliITStrackSA* trs = new AliITStrackSA();
644 fPoint1[0]=primaryVertex[0];
645 fPoint1[1]=primaryVertex[1];
646 fPoint2[0]=arr->GetX();
647 fPoint2[1]=arr->GetY();
648
649 Int_t kk;
650 for(kk=0;kk<AliITSgeomTGeo::GetNLayers()-innLay;kk++) nn[kk] = 0;
651
652 kk=0;
653 nn[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
654 trs,primaryVertex[2],pflag);
655 for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) {
656 kk++;
657 nn[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
658 trs,primaryVertex[2],pflag);
659 if(nn[kk]!=0){
660 pflag=1;
661 if(kk==1) {
662 fPoint3[0]=fPointc[0];
663 fPoint3[1]=fPointc[1];
664 } else {
665 UpdatePoints();
666 }
667 }
668 }
669
670 Int_t layOK=0;
671 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
672 if(nn[nnp]!=0) layOK+=1;
673 }
674 if(layOK==1) {
675 AliITStrackV2* tr2 = 0;
676 Bool_t onePoint = kTRUE;
677 tr2 = FitTrack(trs,primaryVertex,onePoint);
678 if(!tr2) continue;
679
680 AliESDtrack outtrack;
681 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
682 event->AddTrack(&outtrack);
683 ntrack++;
684
685 }
686
687 delete trs;
688 }//end loop on clusters of innLay
689 } //end loop on window sizes
690
691 delete [] nn;
692 } //end loop on innLay
693 } // end search 1-point tracks
ebda3140 694
bef31448 695 delete [] firstmod;
bef31448 696 Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks());
2257f27e 697 return 0;
bef31448 698
699}
7e5bf5af 700
13918578 701//________________________________________________________________________
702
5a03f353 703AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex,Bool_t onePoint) {
ebda3140 704 //fit of the found track (most general case, also <6 points, layers missing)
705 // A.Dainese 16.11.07
13918578 706
13918578 707
cc088660 708 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
cc088660 709 TObjArray** listlayer = new TObjArray*[AliITSgeomTGeo::GetNLayers()];
ebda3140 710 Int_t ** clind=new Int_t*[AliITSgeomTGeo::GetNLayers()];
711 Int_t ** clmark=new Int_t*[AliITSgeomTGeo::GetNLayers()];
cc088660 712 Int_t * nnn = new Int_t[AliITSgeomTGeo::GetNLayers()];
713 Int_t * kkk = new Int_t[AliITSgeomTGeo::GetNLayers()];
13918578 714
ebda3140 715 const Int_t maxclu=AliITStrackSA::GetMaxNumberOfClusters();
13918578 716
ebda3140 717 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
b8ed1a92 718 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
b8ed1a92 719 listlayer[i] = new TObjArray(0,0);
ebda3140 720 nnn[i]=0;
721 kkk[i]=0;
722 clind[i]=new Int_t[maxclu];
723 clmark[i]=new Int_t[maxclu];
724 for(Int_t j=0;j<maxclu; j++){
725 clind[i][j]=0;
726 clmark[i][j]=0;
b8ed1a92 727 }
728 }
2755f080 729
2755f080 730
731 Int_t nclusters = tr->GetNumberOfClustersSA();
2755f080 732 for(Int_t ncl=0;ncl<nclusters;ncl++){
733 Int_t index = tr->GetClusterIndexSA(ncl);
734 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
735 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
736 Int_t lay = (index & 0xf0000000) >> 28;
ebda3140 737 listlayer[lay]->AddLast(cl);
738 Int_t ind=nnn[lay];
739 clind[lay][ind]=index;
2755f080 740 }
741 delete [] nnn;
742
743 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
744 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
745 Int_t mark = tr->GetClusterMark(nlay,ncl);
ebda3140 746 Int_t ind=kkk[nlay];
747 clmark[nlay][ind]=mark;
2755f080 748 }
749 }
750
751 delete [] kkk;
752
753 Int_t firstLay=-1,secondLay=-1;
754 Int_t * end = new Int_t[AliITSgeomTGeo::GetNLayers()];
755 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
756 if(listlayer[i]->GetEntries()==0) {
757 end[i]=1;
758 } else {
759 end[i]=listlayer[i]->GetEntries();
760 if(firstLay==-1) {
761 firstLay=i;
762 } else if(secondLay==-1) {
763 secondLay=i;
764 }
765 }
766 }
767
5a03f353 768 if(firstLay==-1 || (secondLay==-1 && !onePoint)) {
225a692b 769 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
770 delete listlayer[i];
771 delete clind[i];
772 delete clmark[i];
773 }
774 delete [] listlayer;
775 delete [] clind;
776 delete [] clmark;
777 delete [] firstmod;
778 delete [] end;
779 return 0;
780 }
781
2755f080 782 TClonesArray* listSA = new TClonesArray("AliITStrackSA");
783 TClonesArray &tri = *listSA;
784 Int_t nlist=0;
785
786 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
787 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l0);
788 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
789 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l1);
790 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
791 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l2);
792 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
793 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3]->At(l3);
794 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
795 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l4);
796 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
797 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l5);
798
799
800 Double_t x1,y1,z1,sx1,sy1,sz1;
801 Double_t x2,y2,z2,sx2,sy2,sz2;
802 AliITSRecPoint* p1=0;
803 AliITSRecPoint* p2=0;
804 Int_t index1=0,index2=0;
805 Int_t mrk1=0,mrk2=0;
806
807 switch(firstLay) {
808 case 0:
809 p1=cl0;
ebda3140 810 index1=clind[0][l0];mrk1=clmark[0][l0];
2755f080 811 break;
812 case 1:
813 p1=cl1;
ebda3140 814 index1=clind[1][l1];mrk1=clmark[1][l1];
2755f080 815 break;
816 case 2:
817 p1=cl2;
ebda3140 818 index1=clind[2][l2];mrk1=clmark[2][l2];
2755f080 819 break;
820 case 3:
821 p1=cl3;
ebda3140 822 index1=clind[3][l3];mrk1=clmark[3][l3];
2755f080 823 break;
824 case 4:
825 p1=cl4;
ebda3140 826 index1=clind[4][l4];mrk1=clmark[4][l4];
2755f080 827 break;
828 }
829
830 switch(secondLay) {
831 case 1:
832 p2=cl1;
ebda3140 833 index2=clind[1][l1];mrk2=clmark[1][l1];
2755f080 834 break;
835 case 2:
836 p2=cl2;
ebda3140 837 index2=clind[2][l2];mrk2=clmark[2][l2];
2755f080 838 break;
839 case 3:
840 p2=cl3;
ebda3140 841 index2=clind[3][l3];mrk2=clmark[3][l3];
2755f080 842 break;
843 case 4:
844 p2=cl4;
ebda3140 845 index2=clind[4][l4];mrk2=clmark[4][l4];
2755f080 846 break;
847 case 5:
848 p2=cl5;
ebda3140 849 index2=clind[5][l5];mrk2=clmark[5][l5];
2755f080 850 break;
5a03f353 851 default:
852 p2=0;
853 index2=-1;mrk2=-1;
854 break;
2755f080 855 }
856
857 Int_t module1 = p1->GetDetectorIndex()+firstmod[firstLay];
5a03f353 858 Int_t layer,ladder,detector;
859 AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
860 Float_t yclu1 = p1->GetY();
861 Float_t zclu1 = p1->GetZ();
862 Double_t cv=0,tgl2=0,phi2=0;
2755f080 863
864 Int_t cln1=mrk1;
2755f080 865 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1);
2755f080 866 x1 = arr1->GetX();
2755f080 867 y1 = arr1->GetY();
2755f080 868 z1 = arr1->GetZ();
2755f080 869 sx1 = arr1->GetSx();
2755f080 870 sy1 = arr1->GetSy();
2755f080 871 sz1 = arr1->GetSz();
225a692b 872
5a03f353 873 if(secondLay>0) {
874 Int_t cln2=mrk2;
875 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2);
876 x2 = arr2->GetX();
877 y2 = arr2->GetY();
878 z2 = arr2->GetZ();
879 sx2 = arr2->GetSx();
880 sy2 = arr2->GetSy();
881 sz2 = arr2->GetSz();
882 cv = Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
883 tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
884 phi2 = TMath::ATan2((y2-y1),(x2-x1));
885 } else { // special case of 1-point tracks, only for cosmics (B=0)
886 x2 = primaryVertex[0];
887 y2 = primaryVertex[1];
888 z2 = primaryVertex[2];
889 cv = 0;
890 tgl2 = (z1-z2)/TMath::Sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
891 phi2 = TMath::ATan2((y1-y2),(x1-x2));
892 }
893
894
2755f080 895 AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
225a692b 896
897
2755f080 898 if(cl5!=0) {
ebda3140 899 trac->AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0);
900 trac->AddClusterMark(5,clmark[5][l5]);
b8ed1a92 901 }
902 if(cl4!=0){
ebda3140 903 trac->AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0);
904 trac->AddClusterMark(4,clmark[4][l4]);
b8ed1a92 905 }
906 if(cl3!=0){
ebda3140 907 trac->AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0);
908 trac->AddClusterMark(3,clmark[3][l3]);
b8ed1a92 909 }
910 if(cl2!=0){
ebda3140 911 trac->AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0);
912 trac->AddClusterMark(2,clmark[2][l2]);
b8ed1a92 913 }
914 if(cl1!=0){
ebda3140 915 trac->AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0);
916 trac->AddClusterMark(1,clmark[1][l1]);
b8ed1a92 917 }
918 if(cl0!=0){
ebda3140 919 trac->AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0);
920 trac->AddClusterMark(0,clmark[0][l0]);
b8ed1a92 921 }
922
b8ed1a92 923 //fit with Kalman filter using AliITStrackerMI::RefitAt()
924 AliITStrackMI* ot = new AliITStrackSA(*trac);
925
926 ot->ResetCovariance(10.);
927 ot->ResetClusters();
928
e50912db 929 if(RefitAt(AliITSRecoParam::GetrInsideITSscreen(),ot,trac)){ //fit from layer 1 to layer 6
b8ed1a92 930 AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
931 otrack2->ResetCovariance(10.);
932 otrack2->ResetClusters();
933 //fit from layer 6 to layer 1
e50912db 934 if(RefitAt(AliITSRecoParam::GetrInsideSPD1(),otrack2,ot)) {
b8ed1a92 935 fListOfTracks->AddLast(otrack2);
936 new (tri[nlist]) AliITStrackSA(*trac);
937 nlist++;
938 } else {
939 delete otrack2;
940 }
941
942 }
943
944 delete ot;
945 delete trac;
946 }//end loop layer 6
947 }//end loop layer 5
948 }//end loop layer 4
949 }//end loop layer 3
950 }//end loop layer 2
951 }//end loop layer 1
952
953 delete [] end;
954
225a692b 955
b8ed1a92 956
957 Int_t dim=fListOfTracks->GetEntries();
958 if(dim==0){
959 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
960 delete listlayer[i];
ebda3140 961 delete clind[i];
962 delete clmark[i];
b8ed1a92 963 }
964 delete [] listlayer;
ebda3140 965 delete [] clind;
966 delete [] clmark;
b8ed1a92 967 listSA->Delete();
968 delete listSA;
969 delete [] firstmod;
970 return 0;
971 }
972
973 Int_t lowchi2 = FindTrackLowChiSquare(fListOfTracks,dim);
974 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
975 AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2);
976
977 if(otrack==0) {
978 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
979 delete listlayer[i];
ebda3140 980 delete clind[i];
981 delete clmark[i];
b8ed1a92 982 }
983 delete [] listlayer;
ebda3140 984 delete [] clind;
985 delete [] clmark;
b8ed1a92 986 listSA->Delete();
987 delete listSA;
988 delete [] firstmod;
ebda3140 989 delete [] clind;
990 delete [] clmark;
b8ed1a92 991 return 0;
992 }
993 Int_t * indexc = new Int_t[AliITSgeomTGeo::GetNLayers()];
994 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
995 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
996 indexc[nind] = otrack->GetClusterIndex(nind);
997 }
998 Int_t labl[6][3];
999 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
1000 if(i<otrack->GetNumberOfClusters()) {
1001 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc[i]);
1002 labl[i][0]=cl->GetLabel(0);
1003 labl[i][1]=cl->GetLabel(1);
1004 labl[i][2]=cl->GetLabel(2);
1005 } else {
1006 labl[i][0]=-1;
1007 labl[i][1]=-1;
1008 labl[i][2]=-1;
1009 }
1010 }
1011 delete [] indexc;
2755f080 1012
b8ed1a92 1013 CookLabel(otrack,0.); //MI change - to see fake ratio
1014
1015 Int_t label=FindLabel(labl[0][0],labl[1][0],labl[2][0],labl[3][0],labl[4][0],labl[5][0]);
1016 Int_t lflag=0;
2755f080 1017 for(Int_t i=0;i<otrack->GetNumberOfClusters();i++)
b8ed1a92 1018 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
1019
2755f080 1020 if(lflag<otrack->GetNumberOfClusters()) label = -label;
b8ed1a92 1021 otrack->SetLabel(label);
1022
1023 //remove clusters of found track
1024 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
1025 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
1026 Int_t index = trsa->GetClusterMark(nlay,cln);
1027 fCluLayer[nlay]->RemoveAt(index);
1028 RemoveClusterCoord(nlay,index);
1029 fCluLayer[nlay]->Compress();
7e5bf5af 1030 }
1031 }
1032 listSA->Delete();
1033 delete listSA;
1034
cc088660 1035 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
13918578 1036 delete listlayer[i];
ebda3140 1037 delete clind[i];
1038 delete clmark[i];
13918578 1039 }
c09cece6 1040 delete [] listlayer;
037efb75 1041 delete [] firstmod;
ebda3140 1042 delete [] clind;
1043 delete [] clmark;
13918578 1044 return otrack;
1045
1046}
1047
bef31448 1048
4e05ab9a 1049
bef31448 1050//_______________________________________________________
7e5bf5af 1051Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){
13918578 1052 //function used to to find the clusters associated to the track
2755f080 1053
1054 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(layer)) return 0;
1055
13918578 1056 Int_t nc=0;
1057 AliITSlayer &lay = fgLayers[layer];
7e5bf5af 1058 Double_t r=lay.GetR();
2755f080 1059 if(pflag==1){
cfe729e0 1060 Float_t cx1,cx2,cy1,cy2;
1061 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
1062 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
1063 return 0;
1966f03c 1064 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
1065 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
cfe729e0 1066 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
1067 }
13918578 1068
7e5bf5af 1069
1070 Int_t ncl = fCluLayer[layer]->GetEntries();
1071 for (Int_t index=0; index<ncl; index++) {
00a7cc50 1072 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
7e5bf5af 1073 if (!c) continue;
1074 if (c->GetQ()<=0) continue;
1075
1076 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
1077 Double_t phi = arr->GetPhi();
cfe729e0 1078 if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue;
494fda7c 1079
7e5bf5af 1080 Double_t lambda = arr->GetLambda();
cfe729e0 1081 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
1082
7e5bf5af 1083 if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0;
1084 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
1085 Int_t orind = arr->GetOrInd();
1086 trs->AddClusterSA(layer,orind);
1087 trs->AddClusterMark(layer,index);
1088
cfe729e0 1089 nc++;
1090 fLambdac=lambda;
1091 fPhiEstimate=phi;
cfe729e0 1092
7e5bf5af 1093 fPointc[0]=arr->GetX();
1094 fPointc[1]=arr->GetY();
1095
cfe729e0 1096 }
1097 return nc;
1098}
13918578 1099
bef31448 1100//________________________________________________________________
1101void AliITStrackerSA::UpdatePoints(){
1102 //update of points for the estimation of the curvature
13918578 1103
bef31448 1104 fPoint2[0]=fPoint3[0];
1105 fPoint2[1]=fPoint3[1];
1106 fPoint3[0]=fPointc[0];
1107 fPoint3[1]=fPointc[1];
13918578 1108
1109
13918578 1110}
13918578 1111
13918578 1112//___________________________________________________________________
1113Int_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){
1114
1115 //given (x,y) of three recpoints (in global coordinates)
1116 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
1117
1118 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1119 if(den==0) return 0;
1120 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1121 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1122 c = -x1*x1-y1*y1-a*x1-b*y1;
1123 return 1;
1124 }
1125//__________________________________________________________________________
1126 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){
1127
1128 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
1129 //c2 is -rlayer*rlayer
1130
1131 if(a1==0) return 0;
3a2f227d 1132 Double_t m = c2-c1;
1133 Double_t aA = (b1*b1)/(a1*a1)+1;
1134 Double_t bB = (-2*m*b1/(a1*a1));
1135 Double_t cC = c2+(m*m)/(a1*a1);
1136 Double_t dD = bB*bB-4*aA*cC;
1137 if(dD<0) return 0;
13918578 1138
3a2f227d 1139 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
1140 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
13918578 1141 x1 = (c2-c1-b1*y1)/a1;
1142 x2 = (c2-c1-b1*y2)/a1;
1143
1144 return 1;
1145}
1146//____________________________________________________________________
1147Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t
1148x2,Double_t y2,Double_t x3,Double_t y3){
1149
1150 //calculates the curvature of track
1151 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1152 if(den==0) return 0;
1153 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1154 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1155 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
1156 Double_t xc=-a/2.;
1157
1158 if((a*a+b*b-4*c)<0) return 0;
1159 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
1160 if(rad==0) return 0;
1161
1162 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
1163 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
1164 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
1165 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
1166
1167 return 1/rad;
1168
1169}
7e5bf5af 1170
1171
13918578 1172//____________________________________________________________________
1173Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
1174
1175 //Returns the point closest to pp
1176
1177 Double_t diff1 = p1-pp;
1178 Double_t diff2 = p2-pp;
1179
1180 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
1181 else fPhiEstimate=p2;
1182 return fPhiEstimate;
1183
1184}
1185
1186
1187//_________________________________________________________________
7e5bf5af 1188Int_t AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const {
52a9777e 1189 // returns track with lowers chi square
13918578 1190 if(dim==1){
7e5bf5af 1191 //AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(0);
1192 //return trk;
1193 return 0;
13918578 1194 }
52a9777e 1195 if(dim==0) return 0;
037efb75 1196 Double_t * chi2 = new Double_t[dim];
1197 Int_t * index = new Int_t[dim];
13918578 1198 for(Int_t i=0;i<dim;i++){
1199 AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(i);
1200 chi2[i]=trk->GetChi2();
1201 index[i]=i;
1202 }
1203
1204 Int_t w=0;Double_t value;
1205 Int_t lp;
1206 while(w<dim){
1207 for(Int_t j=w+1;j<dim;j++){
1208 if(chi2[w]<chi2[j]){
bef31448 1209 value=chi2[w];
1210 chi2[w]=chi2[j];
1211 chi2[j]=value;
1212 lp=index[w];
1213 index[w]=index[j];
1214 index[j]=lp;
13918578 1215 }
1216 }
1217 w++;
1218 }
52a9777e 1219 Int_t tmp = index[dim-1];
037efb75 1220 delete [] chi2;
1221 delete [] index;
52a9777e 1222 return tmp;
13918578 1223}
1224
1225//__________________________________________________________
2755f080 1226Int_t AliITStrackerSA::FindLabel(Int_t l0, Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5){
13918578 1227
1228 //function used to determine the track label
1229
2755f080 1230 Int_t lb[6] = {l0,l1,l2,l3,l4,l5};
13918578 1231 Int_t aa[6]={1,1,1,1,1,1};
1232 Int_t ff=0;
1233 Int_t ll=0;
1234 Int_t k=0;Int_t w=0;Int_t num=6;
8b3779ef 1235 for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i;
13918578 1236
1237 while(k<num){
1238
1239 for(Int_t i=k+1;i<num;i++){
1240
1241 if(lb[k]==lb[i] && aa[k]!=0){
1242
1243 aa[k]+=1;
1244 aa[i]=0;
1245 }
1246 }
8b3779ef 1247 k++;
13918578 1248 }
1249
1250 while(w<num){
8b3779ef 1251
13918578 1252 for(Int_t j=0;j<6;j++){
1253 if(aa[w]<aa[j]){
1254 ff=aa[w];
1255 aa[w]=aa[j];
1256 aa[j]=ff;
1257 ll=lb[w];
1258 lb[w]=lb[j];
1259 lb[j]=ll;
1260 }
1261 }
8b3779ef 1262 w++;
13918578 1263 }
8b3779ef 1264
1265 if(num<1) return -1;
1266 return lb[num-1];
13918578 1267}
1268
1269//_____________________________________________________________________________
1270Int_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 1271Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){
13918578 1272
1273
1274 //function used to assign label to the found track. If track is fake, the label is negative
1275
1276 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1277 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1278 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1279 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1280 Int_t lflag=0;Int_t num=6;
1281 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1282
1283 for(Int_t i=0;i<num;i++){
1284 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1285 }
1286
2755f080 1287 if(lflag>=minNPoints) return ll;
13918578 1288 else return -ll;
1289
1290
1291}
1292
1293//_____________________________________________________________________________
1294void AliITStrackerSA::SetWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1295 // Set sizes of the phi and lambda windows used for track finding
1296 fNloop = n;
1297 if(phi){ // user defined values
1298 fPhiWin = new Double_t[fNloop];
1299 fLambdaWin = new Double_t[fNloop];
1300 for(Int_t k=0;k<fNloop;k++){
1301 fPhiWin[k]=phi[k];
1302 fLambdaWin[k]=lam[k];
1303 }
1304 }
1305 else { // default values
627b6db6 1306
1307 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
bef31448 1308 0.005,0.0053,0.0055,
1309 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1310 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
627b6db6 1311 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1312 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1313 0.005,0.005,0.006,
1314 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1315 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1316 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
bef31448 1317
627b6db6 1318 if(fNloop!=33){
1319 fNloop = 33;
13918578 1320 }
627b6db6 1321
1322
13918578 1323 fPhiWin = new Double_t[fNloop];
1324 fLambdaWin = new Double_t[fNloop];
e340bb86 1325
e340bb86 1326 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes(); // possibility to enlarge windows for cosmics reco with large misalignments (A.Dainese)
2755f080 1327
1328 for(Int_t k=0;k<fNloop;k++){
e340bb86 1329 fPhiWin[k]=phid[k]*factor;
1330 fLambdaWin[k]=lambdad[k]*factor;
13918578 1331 }
1332
1333 }
1334
1335}
7e5bf5af 1336//_______________________________________________________________________
cc088660 1337void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){
7e5bf5af 1338 //Returns values of phi (azimuthal) and lambda angles for a given cluster
cc088660 1339/*
7e5bf5af 1340 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1341 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1342 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1343
1344 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1345 Double_t phi1=TMath::Pi()/2+alpha;
1346 if (lay==1) phi1+=TMath::Pi();
1347
1348 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1349 Float_t r=tx*cp+ty*sp;
1350
cc088660 1351 xyz= r*cp - cl->GetY()*sp;
7e5bf5af 1352 y= r*sp + cl->GetY()*cp;
1353 z=cl->GetZ();
cc088660 1354*/
1355 Float_t xyz[3];
1356 cl->GetGlobalXYZ(xyz);
1357 x=xyz[0];
1358 y=xyz[1];
1359 z=xyz[2];
1360
1966f03c 1361 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
7e5bf5af 1362 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1363}
13918578 1364
7e5bf5af 1365//________________________________________________________________________
cc088660 1366void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
7e5bf5af 1367
cc088660 1368 //returns sigmax, y, z of cluster in global coordinates
1369/*
7e5bf5af 1370 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
cc088660 1371 Int_t lay,lad,det;
1372 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
7e5bf5af 1373
1374 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1375 Double_t phi=TMath::Pi()/2+alpha;
1376 if (lay==1) phi+=TMath::Pi();
1377
1378 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
cc088660 1379*/
1380 Float_t covm[6];
1381 cl->GetGlobalCov(covm);
1382 sx=TMath::Sqrt(covm[0]);
1383 sy=TMath::Sqrt(covm[3]);
1384 sz=TMath::Sqrt(covm[5]);
1385/*
7e5bf5af 1386 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1387 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1388 sz = TMath::Sqrt(cl->GetSigmaZ2());
cc088660 1389*/
7e5bf5af 1390}