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13918578 1/**************************************************************************
2 * Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
bf6adc12 16/* $Id$ */
17
13918578 18////////////////////////////////////////////////////
19// Stand alone tracker class //
20// Origin: Elisabetta Crescio //
21// e-mail: crescio@to.infn.it //
22// tracks are saved as AliITStrackV2 objects //
23////////////////////////////////////////////////////
24
aa4b78e1 25#include <stdlib.h>
bf6adc12 26
27#include <TArrayI.h>
13918578 28#include <TBranch.h>
13918578 29#include <TObjArray.h>
30#include <TTree.h>
bf6adc12 31
af885e0f 32#include "AliESDEvent.h"
bf6adc12 33#include "AliESDVertex.h"
34#include "AliESDtrack.h"
bf6adc12 35#include "AliITSVertexer.h"
13918578 36#include "AliITSclusterTable.h"
00a7cc50 37#include "AliITSRecPoint.h"
cc088660 38#include "AliITSgeomTGeo.h"
13918578 39#include "AliITStrackSA.h"
bf6adc12 40#include "AliITStrackerSA.h"
e340bb86 41#include "AliITSReconstructor.h"
bf6adc12 42#include "AliRun.h"
13918578 43
44ClassImp(AliITStrackerSA)
45
46//____________________________________________________________________________
e399f961 47AliITStrackerSA::AliITStrackerSA():AliITStrackerMI(),
48fPhiEstimate(0),
1966f03c 49fITSStandAlone(0),
e399f961 50fLambdac(0),
51fPhic(0),
52fCoef1(0),
53fCoef2(0),
54fCoef3(0),
55fNloop(0),
56fPhiWin(0),
57fLambdaWin(0),
58fVert(0),
59fVertexer(0),
e399f961 60fListOfTracks(0),
deae0246 61fListOfSATracks(0),
e399f961 62fITSclusters(0),
63fSixPoints(0),
b8ed1a92 64fOuterStartLayer(0),
e399f961 65fCluLayer(0),
66fCluCoord(0){
13918578 67 // Default constructor
68 Init();
627b6db6 69
13918578 70}
2257f27e 71//____________________________________________________________________________
cc088660 72AliITStrackerSA::AliITStrackerSA(const Char_t *geom):AliITStrackerMI(0),
e399f961 73fPhiEstimate(0),
1966f03c 74fITSStandAlone(0),
e399f961 75fLambdac(0),
76fPhic(0),
77fCoef1(0),
78fCoef2(0),
79fCoef3(0),
80fNloop(0),
81fPhiWin(0),
82fLambdaWin(0),
83fVert(0),
84fVertexer(0),
e399f961 85fListOfTracks(0),
deae0246 86fListOfSATracks(0),
e399f961 87fITSclusters(0),
88fSixPoints(0),
b8ed1a92 89fOuterStartLayer(0),
e399f961 90fCluLayer(0),
91fCluCoord(0)
2257f27e 92{
93 // Standard constructor (Vertex is known and passed to this obj.)
cc088660 94 if (geom) {
95 AliWarning("\"geom\" is actually a dummy argument !");
96 }
97
2257f27e 98 Init();
99 fVert = 0;
627b6db6 100
2257f27e 101}
102
13918578 103//____________________________________________________________________________
cc088660 104AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliESDVertex *vert):AliITStrackerMI(0),
e399f961 105fPhiEstimate(0),
1966f03c 106fITSStandAlone(0),
e399f961 107fLambdac(0),
108fPhic(0),
109fCoef1(0),
110fCoef2(0),
111fCoef3(0),
112fNloop(0),
113fPhiWin(0),
114fLambdaWin(0),
115fVert(vert),
116fVertexer(0),
e399f961 117fListOfTracks(0),
deae0246 118fListOfSATracks(0),
e399f961 119fITSclusters(0),
120fSixPoints(0),
b8ed1a92 121fOuterStartLayer(0),
e399f961 122fCluLayer(0),
1966f03c 123fCluCoord(0)
13918578 124{
125 // Standard constructor (Vertex is known and passed to this obj.)
cc088660 126 if (geom) {
127 AliWarning("\"geom\" is actually a dummy argument !");
128 }
13918578 129 Init();
627b6db6 130
13918578 131}
132
13918578 133//____________________________________________________________________________
cc088660 134AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliITSVertexer *vertexer):AliITStrackerMI(0),
e399f961 135fPhiEstimate(0),
1966f03c 136fITSStandAlone(0),
e399f961 137fLambdac(0),
138fPhic(0),
139fCoef1(0),
140fCoef2(0),
141fCoef3(0),
142fNloop(0),
143fPhiWin(0),
144fLambdaWin(0),
145fVert(),
146fVertexer(vertexer),
e399f961 147fListOfTracks(0),
deae0246 148fListOfSATracks(0),
e399f961 149fITSclusters(0),
150fSixPoints(0),
b8ed1a92 151fOuterStartLayer(0),
e399f961 152fCluLayer(0),
1966f03c 153fCluCoord(0)
13918578 154{
155 // Standard constructor (Vertex is unknown - vertexer is passed to this obj)
cc088660 156 if (geom) {
157 AliWarning("\"geom\" is actually a dummy argument !");
158 }
13918578 159 Init();
160 fVertexer = vertexer;
627b6db6 161
13918578 162}
163
164//____________________________________________________________________________
e399f961 165AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(),
166fPhiEstimate(tracker.fPhiEstimate),
1966f03c 167fITSStandAlone(tracker.fITSStandAlone),
e399f961 168fLambdac(tracker.fLambdac),
169fPhic(tracker.fPhic),
170fCoef1(tracker.fCoef1),
171fCoef2(tracker.fCoef2),
172fCoef3(tracker.fCoef3),
173fNloop(tracker.fNloop),
174fPhiWin(tracker.fPhiWin),
175fLambdaWin(tracker.fLambdaWin),
176fVert(tracker.fVert),
177fVertexer(tracker.fVertexer),
e399f961 178fListOfTracks(tracker.fListOfTracks),
deae0246 179fListOfSATracks(tracker.fListOfSATracks),
e399f961 180fITSclusters(tracker.fITSclusters),
181fSixPoints(tracker.fSixPoints),
b8ed1a92 182fOuterStartLayer(tracker.fOuterStartLayer),
e399f961 183fCluLayer(tracker.fCluLayer),
184fCluCoord(tracker.fCluCoord) {
13918578 185 // Copy constructor
13918578 186 for(Int_t i=0;i<2;i++){
187 fPoint1[i]=tracker.fPoint1[i];
188 fPoint2[i]=tracker.fPoint2[i];
189 fPoint3[i]=tracker.fPoint3[i];
190 fPointc[i]=tracker.fPointc[i];
191 }
13918578 192 if(tracker.fVertexer && tracker.fVert){
d681bb2d 193 fVert = new AliESDVertex(*tracker.fVert);
13918578 194 }
195 else {
196 fVert = tracker.fVert;
197 }
cc088660 198 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 199 fCluLayer[i] = tracker.fCluLayer[i];
200 fCluCoord[i] = tracker.fCluCoord[i];
201 }
13918578 202}
7d62fb64 203//______________________________________________________________________
e399f961 204AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& source){
205 // Assignment operator.
206 this->~AliITStrackerSA();
207 new(this) AliITStrackerSA(source);
208 return *this;
209
7d62fb64 210}
13918578 211
212//____________________________________________________________________________
213AliITStrackerSA::~AliITStrackerSA(){
214 // destructor
d681bb2d 215 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
13918578 216 // and is deleted here
217 if(fVertexer){
218 if(fVert)delete fVert;
219 }
220 fVert = 0;
221 fVertexer = 0;
7e5bf5af 222
13918578 223 if(fPhiWin)delete []fPhiWin;
224 if(fLambdaWin)delete []fLambdaWin;
4e05ab9a 225 fListOfTracks->Delete();
adda6c2b 226 delete fListOfTracks;
deae0246 227 fListOfSATracks->Delete();
228 delete fListOfSATracks;
7e5bf5af 229 if(fCluLayer){
cc088660 230 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 231 if(fCluLayer[i]){
232 fCluLayer[i]->Delete();
233 delete fCluLayer[i];
234 }
235 }
236 delete [] fCluLayer;
237 }
238 if(fCluCoord){
cc088660 239 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 240 if(fCluCoord[i]){
241 fCluCoord[i]->Delete();
242 delete fCluCoord[i];
243 }
244 }
245 delete [] fCluCoord;
627b6db6 246 }
7e5bf5af 247
7e5bf5af 248}
13918578 249
1966f03c 250//____________________________________________________________________________
af885e0f 251Int_t AliITStrackerSA::Clusters2Tracks(AliESDEvent *event){
1966f03c 252// This method is used to find and fit the tracks. By default the corresponding
253// method in the parent class is invoked. In this way a combined tracking
254// TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
255// is done in the ITS only. In the standard reconstruction chain this option
256// can be set via AliReconstruction::SetOption("ITS","onlyITS")
257 Int_t rc=0;
258 if(!fITSStandAlone){
259 rc=AliITStrackerMI::Clusters2Tracks(event);
260 }
261 else {
262 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
263 }
264 if(!rc) rc=FindTracks(event);
265 return rc;
266}
267
13918578 268//____________________________________________________________________________
269void AliITStrackerSA::Init(){
270 // Reset all data members
271 fPhiEstimate=0;
272 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
273 fLambdac=0;
274 fPhic=0;
275 fCoef1=0;
276 fCoef2=0;
277 fCoef3=0;
278 fPointc[0]=0;
279 fPointc[1]=0;
280 fVert = 0;
281 fVertexer = 0;
5b4dedce 282 Int_t nLoops=AliITSReconstructor::GetRecoParam()->GetNLoopsSA();
283 if(nLoops==33){
284 SetFixedWindowSizes();
285 }else{
286 Double_t phimin=AliITSReconstructor::GetRecoParam()->GetMinPhiSA();
287 Double_t phimax=AliITSReconstructor::GetRecoParam()->GetMaxPhiSA();
288 Double_t lambmin=AliITSReconstructor::GetRecoParam()->GetMinLambdaSA();
289 Double_t lambmax=AliITSReconstructor::GetRecoParam()->GetMaxLambdaSA();
290 SetCalculatedWindowSizes(nLoops,phimin,phimax,lambmin,lambmax);
291 }
2257f27e 292 fITSclusters = 0;
293 SetSixPoints();
b8ed1a92 294 SetOuterStartLayer(0);
1966f03c 295 SetSAFlag(kFALSE);
4e05ab9a 296 fListOfTracks=new TObjArray(0,0);
deae0246 297 fListOfSATracks=new TObjArray(0,0);
7e5bf5af 298 fCluLayer = 0;
299 fCluCoord = 0;
627b6db6 300 }
13918578 301//_______________________________________________________________________
302void AliITStrackerSA::ResetForFinding(){
303 // Reset data members used in all loops during track finding
304 fPhiEstimate=0;
305 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
306 fLambdac=0;
307 fPhic=0;
308 fCoef1=0;
309 fCoef2=0;
310 fCoef3=0;
311 fPointc[0]=0;
312 fPointc[1]=0;
4e05ab9a 313 fListOfTracks->Delete();
deae0246 314 fListOfSATracks->Delete();
13918578 315}
bef31448 316
7e5bf5af 317
2257f27e 318
bef31448 319//______________________________________________________________________
af885e0f 320Int_t AliITStrackerSA::FindTracks(AliESDEvent* event){
bef31448 321
7e5bf5af 322// Track finder using the ESD object
6f178e14 323
324
deae0246 325
2257f27e 326 if(!fITSclusters){
327 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
328 return -1;
bef31448 329 }
7e5bf5af 330 //Reads event and mark clusters of traks already found, with flag kITSin
ebda3140 331 Int_t nentr=event->GetNumberOfTracks();
5a03f353 332 if(AliITSReconstructor::GetRecoParam()->GetSAUseAllClusters()==kFALSE) {
333 while (nentr--) {
334 AliESDtrack *track=event->GetTrack(nentr);
5af4a2d0 335 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
5a03f353 336 Int_t idx[12];
337 Int_t ncl = track->GetITSclusters(idx);
338 for(Int_t k=0;k<ncl;k++){
339 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
340 cll->SetBit(kSAflag);
341 }
ebda3140 342 }
343 }
344 }
345 //Get primary vertex
346 Double_t primaryVertex[3];
347 event->GetVertex()->GetXYZ(primaryVertex);
348 //Creates TClonesArray with clusters for each layer. The clusters already used
349 //by AliITStrackerMI are not considered
deae0246 350 Int_t nclusters[AliITSgeomTGeo::kNLayers]={0,0,0,0,0,0};
351 Int_t dmar[AliITSgeomTGeo::kNLayers]={0,0,0,0,0,0};
ebda3140 352 if (fCluLayer == 0) {
deae0246 353 fCluLayer = new TClonesArray*[AliITSgeomTGeo::kNLayers];
354 fCluCoord = new TClonesArray*[AliITSgeomTGeo::kNLayers];
ebda3140 355 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
356 fCluLayer[i]=0;
357 fCluCoord[i]=0;
358 }
359 }
ebda3140 360 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
ebda3140 361 AliITSlayer &layer=fgLayers[i];
25be2b21 362 if (!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) {
363 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
364 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
365 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
366 if(cls->GetQ()==0) continue; //fake clusters dead zones
367 nclusters[i]++;
368 }
ebda3140 369 }
370 dmar[i]=0;
371 delete fCluLayer[i];
372 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
373 delete fCluCoord[i];
374 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
375 }
376
377 for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
378 TClonesArray &clulay = *fCluLayer[ilay];
379 TClonesArray &clucoo = *fCluCoord[ilay];
380 AliITSlayer &layer=fgLayers[ilay];
25be2b21 381 if (!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilay)) {
382 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
383 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
384 if(cls->TestBit(kSAflag)==kTRUE) continue;
385 if(cls->GetQ()==0) continue;
386 Double_t phi=0;Double_t lambda=0;
387 Float_t x=0;Float_t y=0;Float_t z=0;
388 Float_t sx=0;Float_t sy=0;Float_t sz=0;
389 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
390 GetCoorErrors(cls,sx,sy,sz);
391 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
392 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
393 dmar[ilay]++;
394 }
ebda3140 395 }
396 }
7e5bf5af 397
6f178e14 398 // track counter
399 Int_t ntrack=0;
400
ebda3140 401 Int_t minNPoints = (fSixPoints ? AliITSgeomTGeo::GetNLayers() : AliITSgeomTGeo::GetNLayers()-1);
402 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
403 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) {
404 minNPoints--;
405 }
406 }
7e5bf5af 407
deae0246 408 static Int_t nClusLay[AliITSgeomTGeo::kNLayers];//counter for clusters on each layer
6f178e14 409
410 //loop on different minNPoints
411 Int_t minMinNPoints=minNPoints;
9870291d 412 if(AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad()) minMinNPoints=2;
6f178e14 413 for(Int_t iMinNPoints=minNPoints; iMinNPoints>=minMinNPoints; iMinNPoints--) {
414 //loop on the different windows
415 for(Int_t nloop=0;nloop<fNloop;nloop++){
416 for(Int_t ncl=0;ncl<fCluLayer[0]->GetEntries();ncl++){ //loop starting from layer 0
ebda3140 417
6f178e14 418 ResetForFinding();
419 Int_t pflag=0;
ebda3140 420
6f178e14 421 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[0]->At(ncl);
ebda3140 422
6f178e14 423 if(!cl) continue;
424 if (cl->GetQ()<=0) continue;
ebda3140 425
6f178e14 426 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(0,ncl);
427 fPhic = arr->GetPhi();
428 fLambdac = arr->GetLambda();
429 if (TMath::Abs(fLambdac)>0.26*TMath::Pi()) continue;
430 fPhiEstimate = fPhic;
431 AliITStrackSA* trs = new AliITStrackSA();
432 fPoint1[0]=primaryVertex[0];
433 fPoint1[1]=primaryVertex[1];
434
435
436 fPoint2[0]=arr->GetX();
437 fPoint2[1]=arr->GetY();
438 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) nClusLay[i]=0;
439 nClusLay[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
440 nClusLay[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
441 if(nClusLay[1]>0){
442 pflag=1;
443 fPoint3[0] = fPointc[0];
444 fPoint3[1] = fPointc[1];
445 }
446 nClusLay[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
447 if(nClusLay[1]==0 && nClusLay[2]==0) pflag=0;
448 if(nClusLay[2]!=0 && nClusLay[1]!=0){ pflag=1; UpdatePoints();}
449 if(nClusLay[2]!=0 && nClusLay[1]==0){
450 pflag=1;
451 fPoint3[0]=fPointc[0];
452 fPoint3[1]=fPointc[1];
453 }
454
455 nClusLay[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
456 pflag=1;
457 if(nClusLay[3]!=0) UpdatePoints();
458 nClusLay[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
459 pflag=1;
460 if(nClusLay[4]!=0) UpdatePoints();
461 nClusLay[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
462
463
464 Int_t layOK=0;
465 //check of the candidate track
466 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers();nnp++) {
467 if(nClusLay[nnp]!=0) layOK+=1;
468 }
469
470 if(layOK>=iMinNPoints) {
8403ece4 471 //printf("-NPOINTS: %d; MAP: %d %d %d %d %d %d\n",layOK,nClusLay[0],nClusLay[1],nClusLay[2],nClusLay[3],nClusLay[4],nClusLay[5]);
6f178e14 472 AliITStrackV2* tr2 = 0;
473 tr2 = FitTrack(trs,primaryVertex);
474 if(!tr2) continue;
8403ece4 475 //printf("-NPOINTS fit: %d\n",tr2->GetNumberOfClusters());
476
c421499f 477 StoreTrack(tr2,event);
6f178e14 478 ntrack++;
479 }
480 delete trs;
481 }//end loop on clusters of layer1
482 }//end loop on windows
483 }//end loop on min points
2755f080 484
7e5bf5af 485
ebda3140 486 minNPoints--;
7e5bf5af 487
ebda3140 488 //if 5/6 points are required, second loop starting
489 //from second layer (SPD2), to find tracks with point of
8403ece4 490 //layer 1 missing. Not done for cosmics.
491 if(!fSixPoints && fOuterStartLayer==0) {
ebda3140 492 //printf("looking from SPD2\n");
493 // counter for clusters on each layer
ebda3140 494 for(Int_t nloop=0;nloop<fNloop;nloop++){
495 Int_t ncl2=fCluLayer[1]->GetEntries();
496 while(ncl2--){ //loop starting from layer 2
497 ResetForFinding();
498 Int_t pflag=0;
499 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[1]->At(ncl2);
500
501 if(!cl) continue;
502 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(1,ncl2);
503 fPhic = arr->GetPhi();
504 fLambdac = arr->GetLambda();
505 fPhiEstimate = fPhic;
506
507 AliITStrackSA* trs = new AliITStrackSA();
508 fPoint1[0]=primaryVertex[0];
509 fPoint1[1]=primaryVertex[1];
510
511 fPoint2[0]=arr->GetX();
512 fPoint2[1]=arr->GetY();
deae0246 513 for(Int_t kk=0;kk<AliITSgeomTGeo::GetNLayers();kk++) nClusLay[kk] = 0;
514 nClusLay[0] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],
ebda3140 515 trs,primaryVertex[2],pflag);
deae0246 516 nClusLay[1] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],
ebda3140 517 trs,primaryVertex[2],pflag);
deae0246 518 if(nClusLay[1]!=0){
ebda3140 519 pflag=1;
520 fPoint3[0]=fPointc[0];
521 fPoint3[1]=fPointc[1];
522 }
deae0246 523 nClusLay[2]= SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],
ebda3140 524 trs,primaryVertex[2],pflag);
deae0246 525 if(nClusLay[2]!=0){
ebda3140 526 pflag=1;
527 UpdatePoints();
528 }
deae0246 529 nClusLay[3]= SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],
ebda3140 530 trs,primaryVertex[2],pflag);
deae0246 531 if(nClusLay[3]!=0){
ebda3140 532 pflag=1;
533 UpdatePoints();
534 }
deae0246 535 nClusLay[4]=SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],
ebda3140 536 trs,primaryVertex[2],pflag);
537
5a03f353 538 Int_t layOK=0;
ebda3140 539 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-1;nnp++){
deae0246 540 if(nClusLay[nnp]!=0) layOK+=1;
ebda3140 541 }
8403ece4 542 if(layOK>=minNPoints){ // 5/6
543 //printf("--NPOINTS: %d; MAP: %d %d %d %d %d %d\n",layOK,nClusLay[0],nClusLay[1],nClusLay[2],nClusLay[3],nClusLay[4],nClusLay[5]);
544
ebda3140 545 AliITStrackV2* tr2 = 0;
546 tr2 = FitTrack(trs,primaryVertex);
547 if(!tr2) continue;
8403ece4 548 //printf("--NPOINTS fit: %d\n",tr2->GetNumberOfClusters());
ebda3140 549
c421499f 550 StoreTrack(tr2,event);
ebda3140 551 ntrack++;
552
553 }
554
bef31448 555 delete trs;
556 }//end loop on clusters of layer2
ebda3140 557 }
558
ebda3140 559 } //end opt="5/6"
560
561 // search for tracks starting from SPD2, SDD1, SDD2, SSD2
562 // for cosmics (A. Dainese 31.07.07)
9870291d 563 if(fOuterStartLayer>0 && !AliITSReconstructor::GetRecoParam()->GetAllowProlongationWithEmptyRoad()) {
ebda3140 564 for(Int_t innLay=1; innLay<=fOuterStartLayer; innLay++) {
565 //printf("Searching from layer %d outward\n",innLay);
566 minNPoints=AliITSgeomTGeo::GetNLayers()-innLay;
567 for(Int_t i=innLay;i<AliITSgeomTGeo::GetNLayers();i++)
568 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i))
569 minNPoints--;
570 // counter for clusters on each layer
deae0246 571
ebda3140 572 for(Int_t nloop=0;nloop<fNloop;nloop++){
573 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
574 while(nclInnLay--){ //loop starting from layer innLay
575 ResetForFinding();
576 Int_t pflag=0;
577 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay);
578
579 if(!cl) continue;
580 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay);
581 fPhic = arr->GetPhi();
582 fLambdac = arr->GetLambda();
583 fPhiEstimate = fPhic;
584
585 AliITStrackSA* trs = new AliITStrackSA();
586 fPoint1[0]=primaryVertex[0];
587 fPoint1[1]=primaryVertex[1];
588 fPoint2[0]=arr->GetX();
589 fPoint2[1]=arr->GetY();
590
591 Int_t kk;
deae0246 592 for(kk=0;kk<AliITSgeomTGeo::GetNLayers();kk++) nClusLay[kk] = 0;
ebda3140 593
594 kk=0;
deae0246 595 nClusLay[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
b8ed1a92 596 trs,primaryVertex[2],pflag);
ebda3140 597 for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) {
598 kk++;
deae0246 599 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
ebda3140 600 trs,primaryVertex[2],pflag);
deae0246 601 if(nClusLay[kk]!=0){
ebda3140 602 pflag=1;
603 if(kk==1) {
604 fPoint3[0]=fPointc[0];
605 fPoint3[1]=fPointc[1];
606 } else {
607 UpdatePoints();
608 }
609 }
610 }
611
5a03f353 612 Int_t layOK=0;
ebda3140 613 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
deae0246 614 if(nClusLay[nnp]!=0) layOK+=1;
ebda3140 615 }
5a03f353 616 if(layOK>=minNPoints){
8403ece4 617 //printf("---NPOINTS: %d; MAP: %d %d %d %d %d %d\n",layOK,nClusLay[0],nClusLay[1],nClusLay[2],nClusLay[3],nClusLay[4],nClusLay[5]);
ebda3140 618 AliITStrackV2* tr2 = 0;
619 tr2 = FitTrack(trs,primaryVertex);
620 if(!tr2) continue;
8403ece4 621 //printf("---NPOINTS fit: %d\n",tr2->GetNumberOfClusters());
ebda3140 622
c421499f 623 StoreTrack(tr2,event);
ebda3140 624 ntrack++;
625
626 }
627
628 delete trs;
629 }//end loop on clusters of innLay
630 } //end loop on window sizes
631
ebda3140 632 } //end loop on innLay
633 } //end if(fOuterStartLayer>0)
634
5a03f353 635
8403ece4 636 // search for 1-point tracks in SPD, only for cosmics
5a03f353 637 // (A.Dainese 21.03.08)
638 if(AliITSReconstructor::GetRecoParam()->GetSAOnePointTracks() &&
639 TMath::Abs(event->GetMagneticField())<0.01) {
8403ece4 640 Int_t outerLayer=1; // only SPD
641 for(Int_t innLay=0; innLay<=TMath::Min(1,fOuterStartLayer); innLay++) {
5a03f353 642 // counter for clusters on each layer
deae0246 643
5a03f353 644 for(Int_t nloop=0;nloop<fNloop;nloop++){
645 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
646 while(nclInnLay--){ //loop starting from layer innLay
647 ResetForFinding();
648 Int_t pflag=0;
649 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay);
650
651 if(!cl) continue;
652 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay);
653 fPhic = arr->GetPhi();
654 fLambdac = arr->GetLambda();
655 fPhiEstimate = fPhic;
656
657 AliITStrackSA* trs = new AliITStrackSA();
658 fPoint1[0]=primaryVertex[0];
659 fPoint1[1]=primaryVertex[1];
660 fPoint2[0]=arr->GetX();
661 fPoint2[1]=arr->GetY();
662
663 Int_t kk;
deae0246 664 for(kk=0;kk<AliITSgeomTGeo::GetNLayers();kk++) nClusLay[kk] = 0;
5a03f353 665
666 kk=0;
deae0246 667 nClusLay[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
5a03f353 668 trs,primaryVertex[2],pflag);
8403ece4 669 for(Int_t nextLay=innLay+1; nextLay<=outerLayer; nextLay++) {
5a03f353 670 kk++;
deae0246 671 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
5a03f353 672 trs,primaryVertex[2],pflag);
deae0246 673 if(nClusLay[kk]!=0){
5a03f353 674 pflag=1;
675 if(kk==1) {
676 fPoint3[0]=fPointc[0];
677 fPoint3[1]=fPointc[1];
678 } else {
679 UpdatePoints();
680 }
681 }
682 }
683
684 Int_t layOK=0;
685 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
deae0246 686 if(nClusLay[nnp]!=0) layOK+=1;
5a03f353 687 }
688 if(layOK==1) {
8403ece4 689 //printf("----NPOINTS: %d; MAP: %d %d %d %d %d %d\n",layOK,nClusLay[0],nClusLay[1],nClusLay[2],nClusLay[3],nClusLay[4],nClusLay[5]);
5a03f353 690 AliITStrackV2* tr2 = 0;
691 Bool_t onePoint = kTRUE;
692 tr2 = FitTrack(trs,primaryVertex,onePoint);
693 if(!tr2) continue;
8403ece4 694 //printf("----NPOINTS fit: %d\n",tr2->GetNumberOfClusters());
5a03f353 695
c421499f 696 StoreTrack(tr2,event);
5a03f353 697 ntrack++;
698
699 }
700
701 delete trs;
702 }//end loop on clusters of innLay
703 } //end loop on window sizes
704
5a03f353 705 } //end loop on innLay
706 } // end search 1-point tracks
ebda3140 707
bef31448 708 Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks());
2257f27e 709 return 0;
bef31448 710
711}
7e5bf5af 712
13918578 713//________________________________________________________________________
714
5a03f353 715AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex,Bool_t onePoint) {
ebda3140 716 //fit of the found track (most general case, also <6 points, layers missing)
717 // A.Dainese 16.11.07
13918578 718
13918578 719
deae0246 720 const Int_t kMaxClu=AliITStrackSA::kMaxNumberOfClusters;
13918578 721
deae0246 722 static Int_t firstmod[AliITSgeomTGeo::kNLayers];
723
724 static Int_t clind[AliITSgeomTGeo::kNLayers][kMaxClu];
725 static Int_t clmark[AliITSgeomTGeo::kNLayers][kMaxClu];
726 static Int_t nnn[AliITSgeomTGeo::kNLayers];
727 static Int_t kkk[AliITSgeomTGeo::kNLayers];
728 static Int_t end[AliITSgeomTGeo::kNLayers];
729 static AliITSRecPoint *listlayer[AliITSgeomTGeo::kNLayers][kMaxClu];
13918578 730
ebda3140 731 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
b8ed1a92 732 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
ebda3140 733 nnn[i]=0;
734 kkk[i]=0;
deae0246 735 end[i]=0;
736 for(Int_t j=0;j<kMaxClu; j++){
ebda3140 737 clind[i][j]=0;
738 clmark[i][j]=0;
deae0246 739 listlayer[i][j]=0;
740 }
b8ed1a92 741 }
2755f080 742
2755f080 743
744 Int_t nclusters = tr->GetNumberOfClustersSA();
2755f080 745 for(Int_t ncl=0;ncl<nclusters;ncl++){
746 Int_t index = tr->GetClusterIndexSA(ncl);
747 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
748 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
749 Int_t lay = (index & 0xf0000000) >> 28;
deae0246 750 Int_t nInLay=end[lay];
751 listlayer[lay][nInLay]=cl;
ebda3140 752 Int_t ind=nnn[lay];
753 clind[lay][ind]=index;
deae0246 754 end[lay]++;
2755f080 755 }
2755f080 756
757 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
758 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
759 Int_t mark = tr->GetClusterMark(nlay,ncl);
ebda3140 760 Int_t ind=kkk[nlay];
761 clmark[nlay][ind]=mark;
2755f080 762 }
763 }
764
2755f080 765
766 Int_t firstLay=-1,secondLay=-1;
2755f080 767 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
deae0246 768 if(end[i]==0) {
2755f080 769 end[i]=1;
deae0246 770 }else{
2755f080 771 if(firstLay==-1) {
772 firstLay=i;
773 } else if(secondLay==-1) {
774 secondLay=i;
775 }
776 }
777 }
778
deae0246 779 if(firstLay==-1 || (secondLay==-1 && !onePoint)) return 0;
780
2755f080 781 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
deae0246 782 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0][l0];
2755f080 783 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
deae0246 784 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1][l1];
2755f080 785 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
deae0246 786 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2][l2];
2755f080 787 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
deae0246 788 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3][l3];
2755f080 789 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
deae0246 790 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4][l4];
2755f080 791 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
deae0246 792 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5][l5];
2755f080 793
794
795 Double_t x1,y1,z1,sx1,sy1,sz1;
796 Double_t x2,y2,z2,sx2,sy2,sz2;
797 AliITSRecPoint* p1=0;
798 AliITSRecPoint* p2=0;
799 Int_t index1=0,index2=0;
800 Int_t mrk1=0,mrk2=0;
801
802 switch(firstLay) {
803 case 0:
804 p1=cl0;
ebda3140 805 index1=clind[0][l0];mrk1=clmark[0][l0];
2755f080 806 break;
807 case 1:
808 p1=cl1;
ebda3140 809 index1=clind[1][l1];mrk1=clmark[1][l1];
2755f080 810 break;
811 case 2:
812 p1=cl2;
ebda3140 813 index1=clind[2][l2];mrk1=clmark[2][l2];
2755f080 814 break;
815 case 3:
816 p1=cl3;
ebda3140 817 index1=clind[3][l3];mrk1=clmark[3][l3];
2755f080 818 break;
819 case 4:
820 p1=cl4;
ebda3140 821 index1=clind[4][l4];mrk1=clmark[4][l4];
2755f080 822 break;
823 }
824
825 switch(secondLay) {
826 case 1:
827 p2=cl1;
ebda3140 828 index2=clind[1][l1];mrk2=clmark[1][l1];
2755f080 829 break;
830 case 2:
831 p2=cl2;
ebda3140 832 index2=clind[2][l2];mrk2=clmark[2][l2];
2755f080 833 break;
834 case 3:
835 p2=cl3;
ebda3140 836 index2=clind[3][l3];mrk2=clmark[3][l3];
2755f080 837 break;
838 case 4:
839 p2=cl4;
ebda3140 840 index2=clind[4][l4];mrk2=clmark[4][l4];
2755f080 841 break;
842 case 5:
843 p2=cl5;
ebda3140 844 index2=clind[5][l5];mrk2=clmark[5][l5];
2755f080 845 break;
5a03f353 846 default:
847 p2=0;
848 index2=-1;mrk2=-1;
849 break;
2755f080 850 }
851
852 Int_t module1 = p1->GetDetectorIndex()+firstmod[firstLay];
5a03f353 853 Int_t layer,ladder,detector;
854 AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
855 Float_t yclu1 = p1->GetY();
856 Float_t zclu1 = p1->GetZ();
857 Double_t cv=0,tgl2=0,phi2=0;
2755f080 858
859 Int_t cln1=mrk1;
2755f080 860 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1);
2755f080 861 x1 = arr1->GetX();
2755f080 862 y1 = arr1->GetY();
2755f080 863 z1 = arr1->GetZ();
2755f080 864 sx1 = arr1->GetSx();
2755f080 865 sy1 = arr1->GetSy();
2755f080 866 sz1 = arr1->GetSz();
225a692b 867
5a03f353 868 if(secondLay>0) {
869 Int_t cln2=mrk2;
870 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2);
871 x2 = arr2->GetX();
872 y2 = arr2->GetY();
873 z2 = arr2->GetZ();
874 sx2 = arr2->GetSx();
875 sy2 = arr2->GetSy();
876 sz2 = arr2->GetSz();
877 cv = Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
878 tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
879 phi2 = TMath::ATan2((y2-y1),(x2-x1));
880 } else { // special case of 1-point tracks, only for cosmics (B=0)
881 x2 = primaryVertex[0];
882 y2 = primaryVertex[1];
883 z2 = primaryVertex[2];
884 cv = 0;
885 tgl2 = (z1-z2)/TMath::Sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
886 phi2 = TMath::ATan2((y1-y2),(x1-x2));
887 }
888
889
2755f080 890 AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
225a692b 891
892
2755f080 893 if(cl5!=0) {
ebda3140 894 trac->AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0);
895 trac->AddClusterMark(5,clmark[5][l5]);
b8ed1a92 896 }
897 if(cl4!=0){
ebda3140 898 trac->AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0);
899 trac->AddClusterMark(4,clmark[4][l4]);
b8ed1a92 900 }
901 if(cl3!=0){
ebda3140 902 trac->AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0);
903 trac->AddClusterMark(3,clmark[3][l3]);
b8ed1a92 904 }
905 if(cl2!=0){
ebda3140 906 trac->AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0);
907 trac->AddClusterMark(2,clmark[2][l2]);
b8ed1a92 908 }
909 if(cl1!=0){
ebda3140 910 trac->AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0);
911 trac->AddClusterMark(1,clmark[1][l1]);
b8ed1a92 912 }
913 if(cl0!=0){
ebda3140 914 trac->AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0);
915 trac->AddClusterMark(0,clmark[0][l0]);
b8ed1a92 916 }
917
b8ed1a92 918 //fit with Kalman filter using AliITStrackerMI::RefitAt()
919 AliITStrackMI* ot = new AliITStrackSA(*trac);
920
921 ot->ResetCovariance(10.);
922 ot->ResetClusters();
923
e50912db 924 if(RefitAt(AliITSRecoParam::GetrInsideITSscreen(),ot,trac)){ //fit from layer 1 to layer 6
b8ed1a92 925 AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
926 otrack2->ResetCovariance(10.);
927 otrack2->ResetClusters();
928 //fit from layer 6 to layer 1
e50912db 929 if(RefitAt(AliITSRecoParam::GetrInsideSPD1(),otrack2,ot)) {
b8ed1a92 930 fListOfTracks->AddLast(otrack2);
deae0246 931 fListOfSATracks->AddLast(trac);
b8ed1a92 932 } else {
933 delete otrack2;
deae0246 934 delete trac;
b8ed1a92 935 }
936
937 }
938
939 delete ot;
b8ed1a92 940 }//end loop layer 6
941 }//end loop layer 5
942 }//end loop layer 4
943 }//end loop layer 3
944 }//end loop layer 2
945 }//end loop layer 1
946
b8ed1a92 947
225a692b 948
b8ed1a92 949
deae0246 950 if(fListOfTracks->GetEntries()==0) return 0;
b8ed1a92 951
deae0246 952 Int_t lowchi2 = FindTrackLowChiSquare();
b8ed1a92 953 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
deae0246 954 AliITStrackSA* trsa = (AliITStrackSA*)fListOfSATracks->At(lowchi2);
b8ed1a92 955
deae0246 956 if(otrack==0) return 0;
957
958 Int_t indexc[AliITSgeomTGeo::kNLayers];
b8ed1a92 959 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
960 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
961 indexc[nind] = otrack->GetClusterIndex(nind);
962 }
963 Int_t labl[6][3];
964 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
965 if(i<otrack->GetNumberOfClusters()) {
966 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc[i]);
967 labl[i][0]=cl->GetLabel(0);
968 labl[i][1]=cl->GetLabel(1);
969 labl[i][2]=cl->GetLabel(2);
970 } else {
971 labl[i][0]=-1;
972 labl[i][1]=-1;
973 labl[i][2]=-1;
974 }
975 }
2755f080 976
b8ed1a92 977 CookLabel(otrack,0.); //MI change - to see fake ratio
978
979 Int_t label=FindLabel(labl[0][0],labl[1][0],labl[2][0],labl[3][0],labl[4][0],labl[5][0]);
980 Int_t lflag=0;
2755f080 981 for(Int_t i=0;i<otrack->GetNumberOfClusters();i++)
b8ed1a92 982 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
983
2755f080 984 if(lflag<otrack->GetNumberOfClusters()) label = -label;
b8ed1a92 985 otrack->SetLabel(label);
986
987 //remove clusters of found track
988 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
989 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
990 Int_t index = trsa->GetClusterMark(nlay,cln);
991 fCluLayer[nlay]->RemoveAt(index);
992 RemoveClusterCoord(nlay,index);
993 fCluLayer[nlay]->Compress();
7e5bf5af 994 }
995 }
7e5bf5af 996
13918578 997 return otrack;
998
999}
1000
c421499f 1001//_______________________________________________________
1002void AliITStrackerSA::StoreTrack(AliITStrackV2 *t,AliESDEvent *event) const
1003{
1004 //
1005 // Add new track to the ESD
1006 //
1007 AliESDtrack outtrack;
1008 outtrack.UpdateTrackParams(t,AliESDtrack::kITSin);
1009 for(Int_t i=0;i<12;i++) {
1010 outtrack.SetITSModuleIndex(i,t->GetModuleIndex(i));
1011 }
1012 event->AddTrack(&outtrack);
1013
1014 return;
1015}
bef31448 1016
4e05ab9a 1017
bef31448 1018//_______________________________________________________
7e5bf5af 1019Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){
13918578 1020 //function used to to find the clusters associated to the track
2755f080 1021
1022 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(layer)) return 0;
1023
13918578 1024 Int_t nc=0;
1025 AliITSlayer &lay = fgLayers[layer];
7e5bf5af 1026 Double_t r=lay.GetR();
2755f080 1027 if(pflag==1){
cfe729e0 1028 Float_t cx1,cx2,cy1,cy2;
1029 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
1030 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
1031 return 0;
1966f03c 1032 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
1033 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
cfe729e0 1034 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
1035 }
13918578 1036
7e5bf5af 1037
1038 Int_t ncl = fCluLayer[layer]->GetEntries();
1039 for (Int_t index=0; index<ncl; index++) {
00a7cc50 1040 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
7e5bf5af 1041 if (!c) continue;
1042 if (c->GetQ()<=0) continue;
1043
1044 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
1045 Double_t phi = arr->GetPhi();
cfe729e0 1046 if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue;
494fda7c 1047
7e5bf5af 1048 Double_t lambda = arr->GetLambda();
cfe729e0 1049 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
1050
7e5bf5af 1051 if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0;
1052 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
1053 Int_t orind = arr->GetOrInd();
1054 trs->AddClusterSA(layer,orind);
1055 trs->AddClusterMark(layer,index);
1056
cfe729e0 1057 nc++;
1058 fLambdac=lambda;
1059 fPhiEstimate=phi;
cfe729e0 1060
7e5bf5af 1061 fPointc[0]=arr->GetX();
1062 fPointc[1]=arr->GetY();
1063
cfe729e0 1064 }
1065 return nc;
1066}
13918578 1067
bef31448 1068//________________________________________________________________
1069void AliITStrackerSA::UpdatePoints(){
1070 //update of points for the estimation of the curvature
13918578 1071
bef31448 1072 fPoint2[0]=fPoint3[0];
1073 fPoint2[1]=fPoint3[1];
1074 fPoint3[0]=fPointc[0];
1075 fPoint3[1]=fPointc[1];
13918578 1076
1077
13918578 1078}
13918578 1079
13918578 1080//___________________________________________________________________
1081Int_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){
1082
1083 //given (x,y) of three recpoints (in global coordinates)
1084 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
1085
1086 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1087 if(den==0) return 0;
1088 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1089 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1090 c = -x1*x1-y1*y1-a*x1-b*y1;
1091 return 1;
1092 }
1093//__________________________________________________________________________
1094 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){
1095
1096 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
1097 //c2 is -rlayer*rlayer
1098
1099 if(a1==0) return 0;
3a2f227d 1100 Double_t m = c2-c1;
1101 Double_t aA = (b1*b1)/(a1*a1)+1;
1102 Double_t bB = (-2*m*b1/(a1*a1));
1103 Double_t cC = c2+(m*m)/(a1*a1);
1104 Double_t dD = bB*bB-4*aA*cC;
1105 if(dD<0) return 0;
13918578 1106
3a2f227d 1107 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
1108 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
13918578 1109 x1 = (c2-c1-b1*y1)/a1;
1110 x2 = (c2-c1-b1*y2)/a1;
1111
1112 return 1;
1113}
1114//____________________________________________________________________
1115Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t
1116x2,Double_t y2,Double_t x3,Double_t y3){
1117
1118 //calculates the curvature of track
1119 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1120 if(den==0) return 0;
1121 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1122 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1123 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
1124 Double_t xc=-a/2.;
1125
1126 if((a*a+b*b-4*c)<0) return 0;
1127 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
1128 if(rad==0) return 0;
1129
1130 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
1131 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
1132 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
1133 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
1134
1135 return 1/rad;
1136
1137}
7e5bf5af 1138
1139
13918578 1140//____________________________________________________________________
1141Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
1142
1143 //Returns the point closest to pp
1144
1145 Double_t diff1 = p1-pp;
1146 Double_t diff2 = p2-pp;
1147
1148 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
1149 else fPhiEstimate=p2;
1150 return fPhiEstimate;
1151
1152}
1153
1154
1155//_________________________________________________________________
deae0246 1156Int_t AliITStrackerSA::FindTrackLowChiSquare() const {
1157 // returns track with lowest chi square
1158 Int_t dim=fListOfTracks->GetEntries();
1159 if(dim<=1) return 0;
1160 AliITStrackV2* trk = (AliITStrackV2*)fListOfTracks->At(0);
1161 Double_t minChi2=trk->GetChi2();
1162 Int_t index=0;
1163 for(Int_t i=1;i<dim;i++){
4adcf390 1164 trk = (AliITStrackV2*)fListOfTracks->At(i);
deae0246 1165 Double_t chi2=trk->GetChi2();
1166 if(chi2<minChi2){
1167 minChi2=chi2;
1168 index=i;
13918578 1169 }
13918578 1170 }
deae0246 1171 return index;
13918578 1172}
1173
1174//__________________________________________________________
2755f080 1175Int_t AliITStrackerSA::FindLabel(Int_t l0, Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5){
13918578 1176
1177 //function used to determine the track label
1178
2755f080 1179 Int_t lb[6] = {l0,l1,l2,l3,l4,l5};
13918578 1180 Int_t aa[6]={1,1,1,1,1,1};
1181 Int_t ff=0;
1182 Int_t ll=0;
1183 Int_t k=0;Int_t w=0;Int_t num=6;
8b3779ef 1184 for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i;
13918578 1185
1186 while(k<num){
1187
1188 for(Int_t i=k+1;i<num;i++){
1189
1190 if(lb[k]==lb[i] && aa[k]!=0){
1191
1192 aa[k]+=1;
1193 aa[i]=0;
1194 }
1195 }
8b3779ef 1196 k++;
13918578 1197 }
1198
1199 while(w<num){
8b3779ef 1200
13918578 1201 for(Int_t j=0;j<6;j++){
1202 if(aa[w]<aa[j]){
1203 ff=aa[w];
1204 aa[w]=aa[j];
1205 aa[j]=ff;
1206 ll=lb[w];
1207 lb[w]=lb[j];
1208 lb[j]=ll;
1209 }
1210 }
8b3779ef 1211 w++;
13918578 1212 }
8b3779ef 1213
1214 if(num<1) return -1;
1215 return lb[num-1];
13918578 1216}
1217
1218//_____________________________________________________________________________
1219Int_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 1220Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){
13918578 1221
1222
1223 //function used to assign label to the found track. If track is fake, the label is negative
1224
1225 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1226 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1227 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1228 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1229 Int_t lflag=0;Int_t num=6;
1230 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1231
1232 for(Int_t i=0;i<num;i++){
1233 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1234 }
1235
2755f080 1236 if(lflag>=minNPoints) return ll;
13918578 1237 else return -ll;
1238
1239
1240}
13918578 1241//_____________________________________________________________________________
5b4dedce 1242void AliITStrackerSA::SetCalculatedWindowSizes(Int_t n, Float_t phimin, Float_t phimax, Float_t lambdamin, Float_t lambdamax){
1243 // Set sizes of the phi and lambda windows used for track finding
1244 fNloop = n;
1245 if(fPhiWin) delete [] fPhiWin;
1246 if(fLambdaWin) delete [] fLambdaWin;
1247 fPhiWin = new Double_t[fNloop];
1248 fLambdaWin = new Double_t[fNloop];
1249 Float_t stepPhi=(phimax-phimin)/(Float_t)(fNloop-1);
1250 Float_t stepLambda=(lambdamax-lambdamin)/(Float_t)(fNloop-1);
1251 for(Int_t k=0;k<fNloop;k++){
1252 Float_t phi=phimin+k*stepPhi;
1253 Float_t lam=lambdamin+k*stepLambda;
1254 fPhiWin[k]=phi;
1255 fLambdaWin[k]=lam;
1256 }
1257}
1258//_____________________________________________________________________________
1259void AliITStrackerSA::SetFixedWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
13918578 1260 // Set sizes of the phi and lambda windows used for track finding
1261 fNloop = n;
1262 if(phi){ // user defined values
1263 fPhiWin = new Double_t[fNloop];
1264 fLambdaWin = new Double_t[fNloop];
1265 for(Int_t k=0;k<fNloop;k++){
1266 fPhiWin[k]=phi[k];
1267 fLambdaWin[k]=lam[k];
1268 }
1269 }
1270 else { // default values
627b6db6 1271
1272 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
bef31448 1273 0.005,0.0053,0.0055,
1274 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1275 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
627b6db6 1276 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1277 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1278 0.005,0.005,0.006,
1279 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1280 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1281 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
bef31448 1282
627b6db6 1283 if(fNloop!=33){
1284 fNloop = 33;
13918578 1285 }
627b6db6 1286
1287
13918578 1288 fPhiWin = new Double_t[fNloop];
1289 fLambdaWin = new Double_t[fNloop];
e340bb86 1290
e340bb86 1291 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes(); // possibility to enlarge windows for cosmics reco with large misalignments (A.Dainese)
2755f080 1292
1293 for(Int_t k=0;k<fNloop;k++){
e340bb86 1294 fPhiWin[k]=phid[k]*factor;
1295 fLambdaWin[k]=lambdad[k]*factor;
13918578 1296 }
1297
1298 }
1299
1300}
7e5bf5af 1301//_______________________________________________________________________
cc088660 1302void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){
7e5bf5af 1303 //Returns values of phi (azimuthal) and lambda angles for a given cluster
cc088660 1304/*
7e5bf5af 1305 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1306 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1307 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1308
1309 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1310 Double_t phi1=TMath::Pi()/2+alpha;
1311 if (lay==1) phi1+=TMath::Pi();
1312
1313 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1314 Float_t r=tx*cp+ty*sp;
1315
cc088660 1316 xyz= r*cp - cl->GetY()*sp;
7e5bf5af 1317 y= r*sp + cl->GetY()*cp;
1318 z=cl->GetZ();
cc088660 1319*/
1320 Float_t xyz[3];
1321 cl->GetGlobalXYZ(xyz);
1322 x=xyz[0];
1323 y=xyz[1];
1324 z=xyz[2];
1325
1966f03c 1326 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
7e5bf5af 1327 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1328}
13918578 1329
7e5bf5af 1330//________________________________________________________________________
cc088660 1331void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
7e5bf5af 1332
cc088660 1333 //returns sigmax, y, z of cluster in global coordinates
1334/*
7e5bf5af 1335 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
cc088660 1336 Int_t lay,lad,det;
1337 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
7e5bf5af 1338
1339 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1340 Double_t phi=TMath::Pi()/2+alpha;
1341 if (lay==1) phi+=TMath::Pi();
1342
1343 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
cc088660 1344*/
1345 Float_t covm[6];
1346 cl->GetGlobalCov(covm);
1347 sx=TMath::Sqrt(covm[0]);
1348 sy=TMath::Sqrt(covm[3]);
1349 sz=TMath::Sqrt(covm[5]);
1350/*
7e5bf5af 1351 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1352 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1353 sz = TMath::Sqrt(cl->GetSigmaZ2());
cc088660 1354*/
7e5bf5af 1355}