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Adding TDC channel delays to the calib object.
[u/mrichter/AliRoot.git] / ITS / AliITStrackerSA.cxx
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1/**************************************************************************
2 * Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
18////////////////////////////////////////////////////
19// Stand alone tracker class //
20// Origin: Elisabetta Crescio //
21// e-mail: crescio@to.infn.it //
22// tracks are saved as AliITStrackV2 objects //
23////////////////////////////////////////////////////
24
25#include <stdlib.h>
26
27#include <TArrayI.h>
28#include <TBranch.h>
29#include <TObjArray.h>
30#include <TTree.h>
31
32#include "AliESDEvent.h"
33#include "AliESDVertex.h"
34#include "AliESDtrack.h"
35#include "AliITSVertexer.h"
36#include "AliITSclusterTable.h"
37#include "AliITSRecPoint.h"
38#include "AliITSgeomTGeo.h"
39#include "AliITStrackSA.h"
40#include "AliITStrackerSA.h"
41#include "AliITSReconstructor.h"
42#include "AliLog.h"
43#include "AliRun.h"
44
45ClassImp(AliITStrackerSA)
46
47//____________________________________________________________________________
48AliITStrackerSA::AliITStrackerSA():AliITStrackerMI(),
49fPhiEstimate(0),
50fITSStandAlone(0),
51fLambdac(0),
52fPhic(0),
53fCoef1(0),
54fCoef2(0),
55fCoef3(0),
56fNloop(0),
57fPhiWin(0),
58fLambdaWin(0),
59fVert(0),
60fVertexer(0),
61fListOfTracks(0),
62fListOfSATracks(0),
63fITSclusters(0),
64fInwardFlag(0),
65fOuterStartLayer(0),
66fInnerStartLayer(5),
67fMinNPoints(0),
68fMinQ(0.),
69fCluLayer(0),
70fCluCoord(0){
71 // Default constructor
72 Init();
73
74}
75//____________________________________________________________________________
76AliITStrackerSA::AliITStrackerSA(const Char_t *geom):AliITStrackerMI(0),
77fPhiEstimate(0),
78fITSStandAlone(0),
79fLambdac(0),
80fPhic(0),
81fCoef1(0),
82fCoef2(0),
83fCoef3(0),
84fNloop(0),
85fPhiWin(0),
86fLambdaWin(0),
87fVert(0),
88fVertexer(0),
89fListOfTracks(0),
90fListOfSATracks(0),
91fITSclusters(0),
92fInwardFlag(0),
93fOuterStartLayer(0),
94fInnerStartLayer(5),
95fMinNPoints(0),
96fMinQ(0.),
97fCluLayer(0),
98fCluCoord(0)
99{
100 // Standard constructor (Vertex is known and passed to this obj.)
101 if (geom) {
102 AliWarning("\"geom\" is actually a dummy argument !");
103 }
104
105 Init();
106 fVert = 0;
107
108}
109
110//____________________________________________________________________________
111AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliESDVertex *vert):AliITStrackerMI(0),
112fPhiEstimate(0),
113fITSStandAlone(0),
114fLambdac(0),
115fPhic(0),
116fCoef1(0),
117fCoef2(0),
118fCoef3(0),
119fNloop(0),
120fPhiWin(0),
121fLambdaWin(0),
122fVert(vert),
123fVertexer(0),
124fListOfTracks(0),
125fListOfSATracks(0),
126fITSclusters(0),
127fInwardFlag(0),
128fOuterStartLayer(0),
129fInnerStartLayer(5),
130fMinNPoints(0),
131fMinQ(0.),
132fCluLayer(0),
133fCluCoord(0)
134{
135 // Standard constructor (Vertex is known and passed to this obj.)
136 if (geom) {
137 AliWarning("\"geom\" is actually a dummy argument !");
138 }
139 Init();
140
141}
142
143//____________________________________________________________________________
144AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliITSVertexer *vertexer):AliITStrackerMI(0),
145fPhiEstimate(0),
146fITSStandAlone(0),
147fLambdac(0),
148fPhic(0),
149fCoef1(0),
150fCoef2(0),
151fCoef3(0),
152fNloop(0),
153fPhiWin(0),
154fLambdaWin(0),
155fVert(),
156fVertexer(vertexer),
157fListOfTracks(0),
158fListOfSATracks(0),
159fITSclusters(0),
160fInwardFlag(0),
161fOuterStartLayer(0),
162fInnerStartLayer(5),
163fMinNPoints(0),
164fMinQ(0.),
165fCluLayer(0),
166fCluCoord(0)
167{
168 // Standard constructor (Vertex is unknown - vertexer is passed to this obj)
169 if (geom) {
170 AliWarning("\"geom\" is actually a dummy argument !");
171 }
172 Init();
173 fVertexer = vertexer;
174
175}
176
177//____________________________________________________________________________
178AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(),
179fPhiEstimate(tracker.fPhiEstimate),
180fITSStandAlone(tracker.fITSStandAlone),
181fLambdac(tracker.fLambdac),
182fPhic(tracker.fPhic),
183fCoef1(tracker.fCoef1),
184fCoef2(tracker.fCoef2),
185fCoef3(tracker.fCoef3),
186fNloop(tracker.fNloop),
187fPhiWin(tracker.fPhiWin),
188fLambdaWin(tracker.fLambdaWin),
189fVert(tracker.fVert),
190fVertexer(tracker.fVertexer),
191fListOfTracks(tracker.fListOfTracks),
192fListOfSATracks(tracker.fListOfSATracks),
193fITSclusters(tracker.fITSclusters),
194fInwardFlag(tracker.fInwardFlag),
195fOuterStartLayer(tracker.fOuterStartLayer),
196fInnerStartLayer(tracker.fInnerStartLayer),
197fMinNPoints(tracker.fMinNPoints),
198fMinQ(tracker.fMinQ),
199fCluLayer(tracker.fCluLayer),
200fCluCoord(tracker.fCluCoord) {
201 // Copy constructor
202 for(Int_t i=0;i<2;i++){
203 fPoint1[i]=tracker.fPoint1[i];
204 fPoint2[i]=tracker.fPoint2[i];
205 fPoint3[i]=tracker.fPoint3[i];
206 fPointc[i]=tracker.fPointc[i];
207 }
208 if(tracker.fVertexer && tracker.fVert){
209 fVert = new AliESDVertex(*tracker.fVert);
210 }
211 else {
212 fVert = tracker.fVert;
213 }
214 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
215 fCluLayer[i] = tracker.fCluLayer[i];
216 fCluCoord[i] = tracker.fCluCoord[i];
217 }
218}
219//______________________________________________________________________
220AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& source){
221 // Assignment operator.
222 this->~AliITStrackerSA();
223 new(this) AliITStrackerSA(source);
224 return *this;
225
226}
227
228//____________________________________________________________________________
229AliITStrackerSA::~AliITStrackerSA(){
230 // destructor
231 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
232 // and is deleted here
233 if(fVertexer){
234 if(fVert)delete fVert;
235 }
236 fVert = 0;
237 fVertexer = 0;
238
239 if(fPhiWin)delete []fPhiWin;
240 if(fLambdaWin)delete []fLambdaWin;
241 fListOfTracks->Delete();
242 delete fListOfTracks;
243 fListOfSATracks->Delete();
244 delete fListOfSATracks;
245 if(fCluLayer){
246 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
247 if(fCluLayer[i]){
248 fCluLayer[i]->Delete();
249 delete fCluLayer[i];
250 }
251 }
252 delete [] fCluLayer;
253 }
254 if(fCluCoord){
255 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
256 if(fCluCoord[i]){
257 fCluCoord[i]->Delete();
258 delete fCluCoord[i];
259 }
260 }
261 delete [] fCluCoord;
262 }
263
264}
265
266//____________________________________________________________________________
267Int_t AliITStrackerSA::Clusters2Tracks(AliESDEvent *event){
268// This method is used to find and fit the tracks. By default the corresponding
269// method in the parent class is invoked. In this way a combined tracking
270// TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
271// is done in the ITS only. In the standard reconstruction chain this option
272// can be set via AliReconstruction::SetOption("ITS","onlyITS")
273 Int_t rc=0;
274 if(!fITSStandAlone){
275 rc=AliITStrackerMI::Clusters2Tracks(event);
276 }
277 else {
278 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
279 }
280 if(!rc){
281 rc=FindTracks(event,kFALSE);
282 if(AliITSReconstructor::GetRecoParam()->GetSAUseAllClusters()==kTRUE) {
283 rc=FindTracks(event,kTRUE);
284 }
285 }
286
287 return rc;
288}
289
290//____________________________________________________________________________
291void AliITStrackerSA::Init(){
292 // Reset all data members
293 fPhiEstimate=0;
294 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
295 fLambdac=0;
296 fPhic=0;
297 fCoef1=0;
298 fCoef2=0;
299 fCoef3=0;
300 fPointc[0]=0;
301 fPointc[1]=0;
302 fVert = 0;
303 fVertexer = 0;
304 Int_t nLoops=AliITSReconstructor::GetRecoParam()->GetNLoopsSA();
305 if(nLoops==33){
306 SetFixedWindowSizes();
307 }else{
308 Double_t phimin=AliITSReconstructor::GetRecoParam()->GetMinPhiSA();
309 Double_t phimax=AliITSReconstructor::GetRecoParam()->GetMaxPhiSA();
310 Double_t lambmin=AliITSReconstructor::GetRecoParam()->GetMinLambdaSA();
311 Double_t lambmax=AliITSReconstructor::GetRecoParam()->GetMaxLambdaSA();
312 SetCalculatedWindowSizes(nLoops,phimin,phimax,lambmin,lambmax);
313 }
314 fMinQ=AliITSReconstructor::GetRecoParam()->GetSAMinClusterCharge();
315 fITSclusters = 0;
316 SetOuterStartLayer(1);
317 SetSAFlag(kFALSE);
318 fListOfTracks=new TObjArray(0,0);
319 fListOfSATracks=new TObjArray(0,0);
320 fCluLayer = 0;
321 fCluCoord = 0;
322 fMinNPoints = 3;
323 }
324//_______________________________________________________________________
325void AliITStrackerSA::ResetForFinding(){
326 // Reset data members used in all loops during track finding
327 fPhiEstimate=0;
328 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
329 fLambdac=0;
330 fPhic=0;
331 fCoef1=0;
332 fCoef2=0;
333 fCoef3=0;
334 fPointc[0]=0;
335 fPointc[1]=0;
336 fListOfTracks->Delete();
337 fListOfSATracks->Delete();
338}
339
340
341
342//______________________________________________________________________
343Int_t AliITStrackerSA::FindTracks(AliESDEvent* event, Bool_t useAllClusters){
344
345// Track finder using the ESD object
346
347 AliDebug(2,Form(" field is %f",event->GetMagneticField()));
348 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
349
350 if(!fITSclusters){
351 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
352 return -1;
353 }
354 //Reads event and mark clusters of traks already found, with flag kITSin
355 Int_t nentr=event->GetNumberOfTracks();
356 if(!useAllClusters) {
357 while (nentr--) {
358 AliESDtrack *track=event->GetTrack(nentr);
359 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
360 Int_t idx[12];
361 Int_t ncl = track->GetITSclusters(idx);
362 for(Int_t k=0;k<ncl;k++){
363 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
364 cll->SetBit(kSAflag);
365 }
366 }
367 }
368 }else{
369 while (nentr--) {
370 AliESDtrack *track=event->GetTrack(nentr);
371 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
372 Int_t idx[12];
373 Int_t ncl = track->GetITSclusters(idx);
374 for(Int_t k=0;k<ncl;k++){
375 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
376 cll->ResetBit(kSAflag);
377 }
378 }
379 }
380 }
381 //Get primary vertex
382 Double_t primaryVertex[3];
383 event->GetVertex()->GetXYZ(primaryVertex);
384 //Creates TClonesArray with clusters for each layer. The clusters already used
385 //by AliITStrackerMI are not considered
386 Int_t nclusters[AliITSgeomTGeo::kNLayers]={0,0,0,0,0,0};
387 Int_t dmar[AliITSgeomTGeo::kNLayers]={0,0,0,0,0,0};
388 if (fCluLayer == 0) {
389 fCluLayer = new TClonesArray*[AliITSgeomTGeo::kNLayers];
390 fCluCoord = new TClonesArray*[AliITSgeomTGeo::kNLayers];
391 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
392 fCluLayer[i]=0;
393 fCluCoord[i]=0;
394 }
395 }
396 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
397 AliITSlayer &layer=fgLayers[i];
398 if (!ForceSkippingOfLayer(i)) {
399 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
400 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
401 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
402 if(cls->GetQ()==0) continue; //fake clusters dead zones
403 if(i>1 && cls->GetQ()<=fMinQ) continue; // cut on SDD and SSD cluster charge
404 nclusters[i]++;
405 }
406 }
407 dmar[i]=0;
408 if(!fCluLayer[i]){
409 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
410 }else{
411 fCluLayer[i]->Delete();
412 fCluLayer[i]->Expand(nclusters[i]);
413 }
414 if(!fCluCoord[i]){
415 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
416 }else{
417 fCluCoord[i]->Delete();
418 fCluCoord[i]->Expand(nclusters[i]);
419 }
420 }
421
422 for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
423 TClonesArray &clulay = *fCluLayer[ilay];
424 TClonesArray &clucoo = *fCluCoord[ilay];
425 AliITSlayer &layer=fgLayers[ilay];
426 if (!ForceSkippingOfLayer(ilay)) {
427 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
428 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
429 if(cls->TestBit(kSAflag)==kTRUE) continue;
430 if(cls->GetQ()==0) continue;
431 if(ilay>1 && cls->GetQ()<=fMinQ) continue;
432 Double_t phi=0;Double_t lambda=0;
433 Float_t x=0;Float_t y=0;Float_t z=0;
434 Float_t sx=0;Float_t sy=0;Float_t sz=0;
435 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
436 GetCoorErrors(cls,sx,sy,sz);
437 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
438 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
439 dmar[ilay]++;
440 }
441 }
442 }
443
444 // track counter
445 Int_t ntrack=0;
446
447 static Int_t nClusLay[AliITSgeomTGeo::kNLayers];//counter for clusters on each layer
448
449 // loop on minimum number of points
450 for(Int_t iMinNPoints=AliITSgeomTGeo::GetNLayers(); iMinNPoints>=fMinNPoints; iMinNPoints--) {
451
452 if(!fInwardFlag){ // Tracking outwards from the inner layers
453 // loop on starting layer for track finding
454 for(Int_t innLay=0; innLay<=fOuterStartLayer; innLay++) {
455 if(ForceSkippingOfLayer(innLay)) continue;
456 Int_t minNPoints=iMinNPoints-innLay;
457 for(Int_t i=innLay+1;i<AliITSgeomTGeo::GetNLayers();i++)
458 if(ForceSkippingOfLayer(i))
459 minNPoints--;
460 if(minNPoints<fMinNPoints) continue;
461
462 // loop on phi and lambda window size
463 for(Int_t nloop=0;nloop<fNloop;nloop++){
464 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
465 while(nclInnLay--){
466 ResetForFinding();
467 Bool_t useRP=SetFirstPoint(innLay,nclInnLay,primaryVertex);
468 if(!useRP) continue;
469 AliITStrackSA* trs = new AliITStrackSA();
470
471 Int_t pflag=0;
472 Int_t kk;
473 for(kk=0;kk<AliITSgeomTGeo::GetNLayers();kk++) nClusLay[kk] = 0;
474
475 kk=0;
476 nClusLay[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
477 trs,primaryVertex[2],pflag);
478 for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) {
479 kk++;
480 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
481 trs,primaryVertex[2],pflag);
482 if(nClusLay[kk]!=0){
483 pflag=1;
484 if(kk==1) {
485 fPoint3[0]=fPointc[0];
486 fPoint3[1]=fPointc[1];
487 } else {
488 UpdatePoints();
489 }
490 }
491 }
492
493 Int_t layOK=0;
494 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
495 if(nClusLay[nnp]!=0) layOK+=1;
496 }
497 if(layOK>=minNPoints){
498 AliDebug(2,Form("---NPOINTS: %d; MAP: %d %d %d %d %d %d\n",layOK,nClusLay[0],nClusLay[1],nClusLay[2],nClusLay[3],nClusLay[4],nClusLay[5]));
499 AliITStrackV2* tr2 = 0;
500 tr2 = FitTrack(trs,primaryVertex);
501 if(!tr2){
502 delete trs;
503 continue;
504 }
505 AliDebug(2,Form("---NPOINTS fit: %d\n",tr2->GetNumberOfClusters()));
506
507 StoreTrack(tr2,event,useAllClusters);
508 ntrack++;
509
510 }
511
512 delete trs;
513 }//end loop on clusters of innLay
514 } //end loop on window sizes
515 } //end loop on innLay
516 }else{// Tracking inwards from the outer layers
517 // loop on starting layer for track finding
518 for(Int_t outLay=AliITSgeomTGeo::GetNLayers()-1; outLay>=fInnerStartLayer; outLay--) {
519
520 if(ForceSkippingOfLayer(outLay)) continue;
521 Int_t minNPoints=iMinNPoints-(AliITSgeomTGeo::GetNLayers()-1-outLay);
522 for(Int_t i=0;i<outLay-1;i++)
523 if(ForceSkippingOfLayer(i))
524 minNPoints--;
525 if(minNPoints<fMinNPoints) continue;
526
527 // loop on phi and lambda window size
528 for(Int_t nloop=0;nloop<fNloop;nloop++){
529 Int_t nclOutLay=fCluLayer[outLay]->GetEntries();
530 while(nclOutLay--){
531 ResetForFinding();
532 Bool_t useRP=SetFirstPoint(outLay,nclOutLay,primaryVertex);
533 if(!useRP) continue;
534 AliITStrackSA* trs = new AliITStrackSA();
535
536 Int_t pflag=0;
537 Int_t kk;
538 for(kk=0;kk<AliITSgeomTGeo::GetNLayers();kk++) nClusLay[kk] = 0;
539
540 kk=0;
541 nClusLay[kk] = SearchClusters(outLay,fPhiWin[nloop],fLambdaWin[nloop],
542 trs,primaryVertex[2],pflag);
543 for(Int_t nextLay=outLay-1; nextLay>=0; nextLay--) {
544 kk++;
545 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
546 trs,primaryVertex[2],pflag);
547 if(nClusLay[kk]!=0){
548 pflag=1;
549 if(kk==1) {
550 fPoint3[0]=fPointc[0];
551 fPoint3[1]=fPointc[1];
552 } else {
553 UpdatePoints();
554 }
555 }
556 }
557
558 Int_t layOK=0;
559 for(Int_t nnp=outLay; nnp>=0; nnp--){
560 if(nClusLay[nnp]!=0) layOK+=1;
561 }
562 if(layOK>=minNPoints){
563 AliDebug(2,Form("---NPOINTS: %d; MAP: %d %d %d %d %d %d\n",layOK,nClusLay[0],nClusLay[1],nClusLay[2],nClusLay[3],nClusLay[4],nClusLay[5]));
564 AliITStrackV2* tr2 = 0;
565 tr2 = FitTrack(trs,primaryVertex);
566 if(!tr2){
567 delete trs;
568 continue;
569 }
570 AliDebug(2,Form("---NPOINTS fit: %d\n",tr2->GetNumberOfClusters()));
571
572 StoreTrack(tr2,event,useAllClusters);
573 ntrack++;
574
575 }
576
577 delete trs;
578 }//end loop on clusters of innLay
579 } //end loop on window sizes
580 } //end loop on innLay
581 } // end if (fInwardFlag)
582 }//end loop on min points
583
584 // search for 1-point tracks in SPD, only for cosmics
585 // (A.Dainese 21.03.08)
586 if(AliITSReconstructor::GetRecoParam()->GetSAOnePointTracks() &&
587 TMath::Abs(event->GetMagneticField())<0.01) {
588 Int_t outerLayer=1; // only SPD
589 for(Int_t innLay=0; innLay<=TMath::Min(1,fOuterStartLayer); innLay++) {
590 // counter for clusters on each layer
591
592 for(Int_t nloop=0;nloop<fNloop;nloop++){
593 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
594 while(nclInnLay--){ //loop starting from layer innLay
595 ResetForFinding();
596 Bool_t useRP=SetFirstPoint(innLay,nclInnLay,primaryVertex);
597 if(!useRP) continue;
598 AliITStrackSA* trs = new AliITStrackSA();
599
600 Int_t pflag=0;
601 Int_t kk;
602 for(kk=0;kk<AliITSgeomTGeo::GetNLayers();kk++) nClusLay[kk] = 0;
603
604 kk=0;
605 nClusLay[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
606 trs,primaryVertex[2],pflag);
607 for(Int_t nextLay=innLay+1; nextLay<=outerLayer; nextLay++) {
608 kk++;
609 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
610 trs,primaryVertex[2],pflag);
611 if(nClusLay[kk]!=0){
612 pflag=1;
613 if(kk==1) {
614 fPoint3[0]=fPointc[0];
615 fPoint3[1]=fPointc[1];
616 } else {
617 UpdatePoints();
618 }
619 }
620 }
621
622 Int_t layOK=0;
623 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
624 if(nClusLay[nnp]!=0) layOK+=1;
625 }
626 if(layOK==1) {
627 AliDebug(2,Form("----NPOINTS: %d; MAP: %d %d %d %d %d %d\n",layOK,nClusLay[0],nClusLay[1],nClusLay[2],nClusLay[3],nClusLay[4],nClusLay[5]));
628 AliITStrackV2* tr2 = 0;
629 Bool_t onePoint = kTRUE;
630 tr2 = FitTrack(trs,primaryVertex,onePoint);
631 if(!tr2){
632 delete trs;
633 continue;
634 }
635 AliDebug(2,Form("----NPOINTS fit: %d\n",tr2->GetNumberOfClusters()));
636
637 StoreTrack(tr2,event,useAllClusters);
638 ntrack++;
639
640 }
641
642 delete trs;
643 }//end loop on clusters of innLay
644 } //end loop on window sizes
645
646 } //end loop on innLay
647 } // end search 1-point tracks
648
649 if(!useAllClusters) AliInfo(Form("Number of found tracks: %d",event->GetNumberOfTracks()));
650 ResetForFinding();
651 return 0;
652
653}
654
655//________________________________________________________________________
656
657AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex,Bool_t onePoint) {
658 //fit of the found track (most general case, also <6 points, layers missing)
659 // A.Dainese 16.11.07
660
661
662 const Int_t kMaxClu=AliITStrackSA::kMaxNumberOfClusters;
663
664 static Int_t firstmod[AliITSgeomTGeo::kNLayers];
665
666 static Int_t clind[AliITSgeomTGeo::kNLayers][kMaxClu];
667 static Int_t clmark[AliITSgeomTGeo::kNLayers][kMaxClu];
668 static Int_t end[AliITSgeomTGeo::kNLayers];
669 static AliITSRecPoint *listlayer[AliITSgeomTGeo::kNLayers][kMaxClu];
670
671 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
672 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
673 end[i]=0;
674 for(Int_t j=0;j<kMaxClu; j++){
675 clind[i][j]=0;
676 clmark[i][j]=0;
677 listlayer[i][j]=0;
678 }
679 }
680
681
682 Int_t nclusters = tr->GetNumberOfClustersSA();
683 for(Int_t ncl=0;ncl<nclusters;ncl++){
684 Int_t index = tr->GetClusterIndexSA(ncl);
685 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
686 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
687 Int_t lay = (index & 0xf0000000) >> 28;
688 Int_t nInLay=end[lay];
689 listlayer[lay][nInLay]=cl;
690 clind[lay][nInLay]=index;
691 end[lay]++;
692 }
693
694 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
695 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
696 Int_t mark = tr->GetClusterMark(nlay,ncl);
697 clmark[nlay][ncl]=mark;
698 }
699 }
700
701
702 Int_t firstLay=-1,secondLay=-1;
703 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
704 if(end[i]==0) {
705 end[i]=1;
706 }else{
707 if(firstLay==-1) {
708 firstLay=i;
709 } else if(secondLay==-1) {
710 secondLay=i;
711 }
712 }
713 }
714
715 if(firstLay==-1 || (secondLay==-1 && !onePoint)) return 0;
716
717 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
718 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0][l0];
719 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
720 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1][l1];
721 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
722 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2][l2];
723 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
724 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3][l3];
725 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
726 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4][l4];
727 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
728 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5][l5];
729
730
731 Double_t x1,y1,z1,sx1,sy1,sz1;
732 Double_t x2,y2,z2,sx2,sy2,sz2;
733 AliITSRecPoint* p1=0;
734 AliITSRecPoint* p2=0;
735 Int_t index1=0,index2=0;
736 Int_t mrk1=0,mrk2=0;
737
738 switch(firstLay) {
739 case 0:
740 p1=cl0;
741 index1=clind[0][l0];mrk1=clmark[0][l0];
742 break;
743 case 1:
744 p1=cl1;
745 index1=clind[1][l1];mrk1=clmark[1][l1];
746 break;
747 case 2:
748 p1=cl2;
749 index1=clind[2][l2];mrk1=clmark[2][l2];
750 break;
751 case 3:
752 p1=cl3;
753 index1=clind[3][l3];mrk1=clmark[3][l3];
754 break;
755 case 4:
756 p1=cl4;
757 index1=clind[4][l4];mrk1=clmark[4][l4];
758 break;
759 }
760
761 switch(secondLay) {
762 case 1:
763 p2=cl1;
764 index2=clind[1][l1];mrk2=clmark[1][l1];
765 break;
766 case 2:
767 p2=cl2;
768 index2=clind[2][l2];mrk2=clmark[2][l2];
769 break;
770 case 3:
771 p2=cl3;
772 index2=clind[3][l3];mrk2=clmark[3][l3];
773 break;
774 case 4:
775 p2=cl4;
776 index2=clind[4][l4];mrk2=clmark[4][l4];
777 break;
778 case 5:
779 p2=cl5;
780 index2=clind[5][l5];mrk2=clmark[5][l5];
781 break;
782 default:
783 p2=0;
784 index2=-1;mrk2=-1;
785 break;
786 }
787
788 Int_t module1 = p1->GetDetectorIndex()+firstmod[firstLay];
789 Int_t layer,ladder,detector;
790 AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
791 Float_t yclu1 = p1->GetY();
792 Float_t zclu1 = p1->GetZ();
793 Double_t cv=0,tgl2=0,phi2=0;
794
795 Int_t cln1=mrk1;
796 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1);
797 x1 = arr1->GetX();
798 y1 = arr1->GetY();
799 z1 = arr1->GetZ();
800 sx1 = arr1->GetSx();
801 sy1 = arr1->GetSy();
802 sz1 = arr1->GetSz();
803
804 if(secondLay>0) {
805 Int_t cln2=mrk2;
806 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2);
807 x2 = arr2->GetX();
808 y2 = arr2->GetY();
809 z2 = arr2->GetZ();
810 sx2 = arr2->GetSx();
811 sy2 = arr2->GetSy();
812 sz2 = arr2->GetSz();
813 cv = Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
814 tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
815 phi2 = TMath::ATan2((y2-y1),(x2-x1));
816 } else { // special case of 1-point tracks, only for cosmics (B=0)
817 x2 = primaryVertex[0];
818 y2 = primaryVertex[1];
819 z2 = primaryVertex[2];
820 cv = 0;
821 tgl2 = (z1-z2)/TMath::Sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
822 phi2 = TMath::ATan2((y1-y2),(x1-x2));
823 }
824
825
826 AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
827
828
829 if(cl5!=0) {
830 trac->AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0);
831 trac->AddClusterMark(5,clmark[5][l5]);
832 }
833 if(cl4!=0){
834 trac->AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0);
835 trac->AddClusterMark(4,clmark[4][l4]);
836 }
837 if(cl3!=0){
838 trac->AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0);
839 trac->AddClusterMark(3,clmark[3][l3]);
840 }
841 if(cl2!=0){
842 trac->AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0);
843 trac->AddClusterMark(2,clmark[2][l2]);
844 }
845 if(cl1!=0){
846 trac->AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0);
847 trac->AddClusterMark(1,clmark[1][l1]);
848 }
849 if(cl0!=0){
850 trac->AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0);
851 trac->AddClusterMark(0,clmark[0][l0]);
852 }
853
854 //fit with Kalman filter using AliITStrackerMI::RefitAt()
855 AliITStrackMI* ot = new AliITStrackSA(*trac);
856
857 ot->ResetCovariance(10.);
858 ot->ResetClusters();
859
860 // Propagate inside the innermost layer with a cluster
861 if(ot->Propagate(ot->GetX()-0.1*ot->GetX())) {
862
863 if(RefitAt(AliITSRecoParam::GetrInsideITSscreen(),ot,trac)){ //fit from layer 1 to layer 6
864 AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
865 otrack2->ResetCovariance(10.);
866 otrack2->ResetClusters();
867 //fit from layer 6 to layer 1
868 if(RefitAt(AliITSRecoParam::GetrInsideSPD1(),otrack2,ot)) {
869 fListOfTracks->AddLast(otrack2);
870 fListOfSATracks->AddLast(trac);
871 } else {
872 delete otrack2;
873 delete trac;
874 }
875
876 }
877 }
878 delete ot;
879 }//end loop layer 6
880 }//end loop layer 5
881 }//end loop layer 4
882 }//end loop layer 3
883 }//end loop layer 2
884 }//end loop layer 1
885
886
887
888
889 if(fListOfTracks->GetEntries()==0) return 0;
890
891 Int_t lowchi2 = FindTrackLowChiSquare();
892 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
893 AliITStrackSA* trsa = (AliITStrackSA*)fListOfSATracks->At(lowchi2);
894
895 if(otrack==0) return 0;
896
897 Int_t indexc[AliITSgeomTGeo::kNLayers];
898 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
899 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
900 indexc[nind] = otrack->GetClusterIndex(nind);
901 }
902 Int_t labl[6][3];
903 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
904 if(i<otrack->GetNumberOfClusters()) {
905 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc[i]);
906 labl[i][0]=cl->GetLabel(0);
907 labl[i][1]=cl->GetLabel(1);
908 labl[i][2]=cl->GetLabel(2);
909 } else {
910 labl[i][0]=-1;
911 labl[i][1]=-1;
912 labl[i][2]=-1;
913 }
914 }
915
916 CookLabel(otrack,0.); //MI change - to see fake ratio
917
918 Int_t label=FindLabel(labl[0][0],labl[1][0],labl[2][0],labl[3][0],labl[4][0],labl[5][0]);
919 Int_t lflag=0;
920 for(Int_t i=0;i<otrack->GetNumberOfClusters();i++)
921 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
922
923 if(lflag<otrack->GetNumberOfClusters()) label = -label;
924 otrack->SetLabel(label);
925
926 //remove clusters of found track
927 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
928 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
929 Int_t index = trsa->GetClusterMark(nlay,cln);
930 fCluLayer[nlay]->RemoveAt(index);
931 RemoveClusterCoord(nlay,index);
932 fCluLayer[nlay]->Compress();
933 }
934 }
935
936 return otrack;
937
938}
939
940//_______________________________________________________
941void AliITStrackerSA::StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) const
942{
943 //
944 // Add new track to the ESD
945 //
946 AliESDtrack outtrack;
947 outtrack.UpdateTrackParams(t,AliESDtrack::kITSin);
948 if(pureSA) outtrack.SetStatus(AliESDtrack::kITSpureSA);
949 for(Int_t i=0;i<12;i++) {
950 outtrack.SetITSModuleIndex(i,t->GetModuleIndex(i));
951 }
952 Double_t sdedx[4]={0.,0.,0.,0.};
953 for(Int_t i=0; i<4; i++) sdedx[i]=t->GetSampledEdx(i);
954 outtrack.SetITSdEdxSamples(sdedx);
955 event->AddTrack(&outtrack);
956
957 return;
958}
959
960
961//_______________________________________________________
962Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){
963 //function used to to find the clusters associated to the track
964
965 if(ForceSkippingOfLayer(layer)) return 0;
966
967 Int_t nc=0;
968 AliITSlayer &lay = fgLayers[layer];
969 Double_t r=lay.GetR();
970 if(pflag==1){
971 Float_t cx1,cx2,cy1,cy2;
972 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
973 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
974 return 0;
975 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
976 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
977 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
978 }
979
980
981 Int_t ncl = fCluLayer[layer]->GetEntries();
982 for (Int_t index=0; index<ncl; index++) {
983 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
984 if (!c) continue;
985 if (c->GetQ()<=0) continue;
986 if(layer>1 && c->GetQ()<=fMinQ) continue;
987
988 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
989 Double_t phi = arr->GetPhi();
990 if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue;
991
992 Double_t lambda = arr->GetLambda();
993 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
994
995 if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0;
996 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
997 Int_t orind = arr->GetOrInd();
998 trs->AddClusterSA(layer,orind);
999 trs->AddClusterMark(layer,index);
1000
1001 nc++;
1002 fLambdac=lambda;
1003 fPhiEstimate=phi;
1004
1005 fPointc[0]=arr->GetX();
1006 fPointc[1]=arr->GetY();
1007
1008 }
1009 return nc;
1010}
1011
1012//________________________________________________________________
1013Bool_t AliITStrackerSA::SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex){
1014 // Sets the first point (seed) for tracking
1015
1016 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[lay]->At(clu);
1017 if(!cl) return kFALSE;
1018 if (cl->GetQ()<=0) return kFALSE;
1019 if(lay>1 && cl->GetQ()<=fMinQ) return kFALSE;
1020
1021 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(lay,clu);
1022 fPhic = arr->GetPhi();
1023 fLambdac = arr->GetLambda();
1024 fPhiEstimate = fPhic;
1025 fPoint1[0]=primaryVertex[0];
1026 fPoint1[1]=primaryVertex[1];
1027 fPoint2[0]=arr->GetX();
1028 fPoint2[1]=arr->GetY();
1029 return kTRUE;
1030}
1031
1032//________________________________________________________________
1033void AliITStrackerSA::UpdatePoints(){
1034 //update of points for the estimation of the curvature
1035
1036 fPoint2[0]=fPoint3[0];
1037 fPoint2[1]=fPoint3[1];
1038 fPoint3[0]=fPointc[0];
1039 fPoint3[1]=fPointc[1];
1040
1041
1042}
1043
1044//___________________________________________________________________
1045Int_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){
1046
1047 //given (x,y) of three recpoints (in global coordinates)
1048 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
1049
1050 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1051 if(den==0) return 0;
1052 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1053 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1054 c = -x1*x1-y1*y1-a*x1-b*y1;
1055 return 1;
1056 }
1057//__________________________________________________________________________
1058 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){
1059
1060 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
1061 //c2 is -rlayer*rlayer
1062
1063 if(a1==0) return 0;
1064 Double_t m = c2-c1;
1065 Double_t aA = (b1*b1)/(a1*a1)+1;
1066 Double_t bB = (-2*m*b1/(a1*a1));
1067 Double_t cC = c2+(m*m)/(a1*a1);
1068 Double_t dD = bB*bB-4*aA*cC;
1069 if(dD<0) return 0;
1070
1071 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
1072 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
1073 x1 = (c2-c1-b1*y1)/a1;
1074 x2 = (c2-c1-b1*y2)/a1;
1075
1076 return 1;
1077}
1078//____________________________________________________________________
1079Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t
1080x2,Double_t y2,Double_t x3,Double_t y3){
1081
1082 //calculates the curvature of track
1083 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1084 if(den==0) return 0;
1085 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1086 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1087 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
1088 Double_t xc=-a/2.;
1089
1090 if((a*a+b*b-4*c)<0) return 0;
1091 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
1092 if(rad==0) return 0;
1093
1094 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
1095 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
1096 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
1097 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
1098
1099 return 1/rad;
1100
1101}
1102
1103
1104//____________________________________________________________________
1105Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
1106
1107 //Returns the point closest to pp
1108
1109 Double_t diff1 = p1-pp;
1110 Double_t diff2 = p2-pp;
1111
1112 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
1113 else fPhiEstimate=p2;
1114 return fPhiEstimate;
1115
1116}
1117
1118
1119//_________________________________________________________________
1120Int_t AliITStrackerSA::FindTrackLowChiSquare() const {
1121 // returns track with lowest chi square
1122 Int_t dim=fListOfTracks->GetEntries();
1123 if(dim<=1) return 0;
1124 AliITStrackV2* trk = (AliITStrackV2*)fListOfTracks->At(0);
1125 Double_t minChi2=trk->GetChi2();
1126 Int_t index=0;
1127 for(Int_t i=1;i<dim;i++){
1128 trk = (AliITStrackV2*)fListOfTracks->At(i);
1129 Double_t chi2=trk->GetChi2();
1130 if(chi2<minChi2){
1131 minChi2=chi2;
1132 index=i;
1133 }
1134 }
1135 return index;
1136}
1137
1138//__________________________________________________________
1139Int_t AliITStrackerSA::FindLabel(Int_t l0, Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5){
1140
1141 //function used to determine the track label
1142
1143 Int_t lb[6] = {l0,l1,l2,l3,l4,l5};
1144 Int_t aa[6]={1,1,1,1,1,1};
1145 Int_t ff=0;
1146 Int_t ll=0;
1147 Int_t k=0;Int_t w=0;Int_t num=6;
1148 for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i;
1149
1150 while(k<num){
1151
1152 for(Int_t i=k+1;i<num;i++){
1153
1154 if(lb[k]==lb[i] && aa[k]!=0){
1155
1156 aa[k]+=1;
1157 aa[i]=0;
1158 }
1159 }
1160 k++;
1161 }
1162
1163 while(w<num){
1164
1165 for(Int_t j=0;j<6;j++){
1166 if(aa[w]<aa[j]){
1167 ff=aa[w];
1168 aa[w]=aa[j];
1169 aa[j]=ff;
1170 ll=lb[w];
1171 lb[w]=lb[j];
1172 lb[j]=ll;
1173 }
1174 }
1175 w++;
1176 }
1177
1178 if(num<1) return -1;
1179 return lb[num-1];
1180}
1181
1182//_____________________________________________________________________________
1183Int_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,
1184Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){
1185
1186
1187 //function used to assign label to the found track. If track is fake, the label is negative
1188
1189 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1190 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1191 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1192 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1193 Int_t lflag=0;Int_t num=6;
1194 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1195
1196 for(Int_t i=0;i<num;i++){
1197 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1198 }
1199
1200 if(lflag>=minNPoints) return ll;
1201 else return -ll;
1202
1203
1204}
1205//_____________________________________________________________________________
1206void AliITStrackerSA::SetCalculatedWindowSizes(Int_t n, Float_t phimin, Float_t phimax, Float_t lambdamin, Float_t lambdamax){
1207 // Set sizes of the phi and lambda windows used for track finding
1208 fNloop = n;
1209 if(fPhiWin) delete [] fPhiWin;
1210 if(fLambdaWin) delete [] fLambdaWin;
1211 fPhiWin = new Double_t[fNloop];
1212 fLambdaWin = new Double_t[fNloop];
1213 Float_t stepPhi=(phimax-phimin)/(Float_t)(fNloop-1);
1214 Float_t stepLambda=(lambdamax-lambdamin)/(Float_t)(fNloop-1);
1215 for(Int_t k=0;k<fNloop;k++){
1216 Float_t phi=phimin+k*stepPhi;
1217 Float_t lam=lambdamin+k*stepLambda;
1218 fPhiWin[k]=phi;
1219 fLambdaWin[k]=lam;
1220 }
1221}
1222//_____________________________________________________________________________
1223void AliITStrackerSA::SetFixedWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1224 // Set sizes of the phi and lambda windows used for track finding
1225 fNloop = n;
1226 if(phi){ // user defined values
1227 fPhiWin = new Double_t[fNloop];
1228 fLambdaWin = new Double_t[fNloop];
1229 for(Int_t k=0;k<fNloop;k++){
1230 fPhiWin[k]=phi[k];
1231 fLambdaWin[k]=lam[k];
1232 }
1233 }
1234 else { // default values
1235
1236 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
1237 0.005,0.0053,0.0055,
1238 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1239 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
1240 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1241 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1242 0.005,0.005,0.006,
1243 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1244 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1245 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
1246
1247 if(fNloop!=33){
1248 fNloop = 33;
1249 }
1250
1251
1252 fPhiWin = new Double_t[fNloop];
1253 fLambdaWin = new Double_t[fNloop];
1254
1255 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes(); // possibility to enlarge windows for cosmics reco with large misalignments (A.Dainese)
1256
1257 for(Int_t k=0;k<fNloop;k++){
1258 fPhiWin[k]=phid[k]*factor;
1259 fLambdaWin[k]=lambdad[k]*factor;
1260 }
1261
1262 }
1263
1264}
1265//_______________________________________________________________________
1266void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){
1267 //Returns values of phi (azimuthal) and lambda angles for a given cluster
1268/*
1269 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1270 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1271 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1272
1273 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1274 Double_t phi1=TMath::Pi()/2+alpha;
1275 if (lay==1) phi1+=TMath::Pi();
1276
1277 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1278 Float_t r=tx*cp+ty*sp;
1279
1280 xyz= r*cp - cl->GetY()*sp;
1281 y= r*sp + cl->GetY()*cp;
1282 z=cl->GetZ();
1283*/
1284 Float_t xyz[3];
1285 cl->GetGlobalXYZ(xyz);
1286 x=xyz[0];
1287 y=xyz[1];
1288 z=xyz[2];
1289
1290 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
1291 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1292}
1293
1294//________________________________________________________________________
1295void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
1296
1297 //returns sigmax, y, z of cluster in global coordinates
1298/*
1299 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1300 Int_t lay,lad,det;
1301 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
1302
1303 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1304 Double_t phi=TMath::Pi()/2+alpha;
1305 if (lay==1) phi+=TMath::Pi();
1306
1307 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
1308*/
1309 Float_t covm[6];
1310 cl->GetGlobalCov(covm);
1311 sx=TMath::Sqrt(covm[0]);
1312 sy=TMath::Sqrt(covm[3]);
1313 sz=TMath::Sqrt(covm[5]);
1314/*
1315 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1316 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1317 sz = TMath::Sqrt(cl->GetSigmaZ2());
1318*/
1319}