]> git.uio.no Git - u/mrichter/AliRoot.git/blame - ITS/AliITStrackerSA.cxx
git://git.uio.no / u / mrichter / AliRoot.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
SDD services on the cones implemented and activated (M. Sitta)
[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}
2257f27e 70//____________________________________________________________________________
cc088660 71AliITStrackerSA::AliITStrackerSA(const Char_t *geom):AliITStrackerMI(0),
e399f961 72fPhiEstimate(0),
1966f03c 73fITSStandAlone(0),
e399f961 74fLambdac(0),
75fPhic(0),
76fCoef1(0),
77fCoef2(0),
78fCoef3(0),
79fNloop(0),
80fPhiWin(0),
81fLambdaWin(0),
82fVert(0),
83fVertexer(0),
e399f961 84fListOfTracks(0),
85fITSclusters(0),
86fSixPoints(0),
b8ed1a92 87fOuterStartLayer(0),
e399f961 88fCluLayer(0),
89fCluCoord(0)
2257f27e 90{
91 // Standard constructor (Vertex is known and passed to this obj.)
cc088660 92 if (geom) {
93 AliWarning("\"geom\" is actually a dummy argument !");
94 }
95
2257f27e 96 Init();
97 fVert = 0;
627b6db6 98
2257f27e 99}
100
13918578 101//____________________________________________________________________________
cc088660 102AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliESDVertex *vert):AliITStrackerMI(0),
e399f961 103fPhiEstimate(0),
1966f03c 104fITSStandAlone(0),
e399f961 105fLambdac(0),
106fPhic(0),
107fCoef1(0),
108fCoef2(0),
109fCoef3(0),
110fNloop(0),
111fPhiWin(0),
112fLambdaWin(0),
113fVert(vert),
114fVertexer(0),
e399f961 115fListOfTracks(0),
116fITSclusters(0),
117fSixPoints(0),
b8ed1a92 118fOuterStartLayer(0),
e399f961 119fCluLayer(0),
1966f03c 120fCluCoord(0)
13918578 121{
122 // Standard constructor (Vertex is known and passed to this obj.)
cc088660 123 if (geom) {
124 AliWarning("\"geom\" is actually a dummy argument !");
125 }
13918578 126 Init();
627b6db6 127
13918578 128}
129
13918578 130//____________________________________________________________________________
cc088660 131AliITStrackerSA::AliITStrackerSA(const Char_t *geom, AliITSVertexer *vertexer):AliITStrackerMI(0),
e399f961 132fPhiEstimate(0),
1966f03c 133fITSStandAlone(0),
e399f961 134fLambdac(0),
135fPhic(0),
136fCoef1(0),
137fCoef2(0),
138fCoef3(0),
139fNloop(0),
140fPhiWin(0),
141fLambdaWin(0),
142fVert(),
143fVertexer(vertexer),
e399f961 144fListOfTracks(0),
145fITSclusters(0),
146fSixPoints(0),
b8ed1a92 147fOuterStartLayer(0),
e399f961 148fCluLayer(0),
1966f03c 149fCluCoord(0)
13918578 150{
151 // Standard constructor (Vertex is unknown - vertexer is passed to this obj)
cc088660 152 if (geom) {
153 AliWarning("\"geom\" is actually a dummy argument !");
154 }
13918578 155 Init();
156 fVertexer = vertexer;
627b6db6 157
13918578 158}
159
160//____________________________________________________________________________
e399f961 161AliITStrackerSA::AliITStrackerSA(const AliITStrackerSA& tracker):AliITStrackerMI(),
162fPhiEstimate(tracker.fPhiEstimate),
1966f03c 163fITSStandAlone(tracker.fITSStandAlone),
e399f961 164fLambdac(tracker.fLambdac),
165fPhic(tracker.fPhic),
166fCoef1(tracker.fCoef1),
167fCoef2(tracker.fCoef2),
168fCoef3(tracker.fCoef3),
169fNloop(tracker.fNloop),
170fPhiWin(tracker.fPhiWin),
171fLambdaWin(tracker.fLambdaWin),
172fVert(tracker.fVert),
173fVertexer(tracker.fVertexer),
e399f961 174fListOfTracks(tracker.fListOfTracks),
175fITSclusters(tracker.fITSclusters),
176fSixPoints(tracker.fSixPoints),
b8ed1a92 177fOuterStartLayer(tracker.fOuterStartLayer),
e399f961 178fCluLayer(tracker.fCluLayer),
179fCluCoord(tracker.fCluCoord) {
13918578 180 // Copy constructor
13918578 181 for(Int_t i=0;i<2;i++){
182 fPoint1[i]=tracker.fPoint1[i];
183 fPoint2[i]=tracker.fPoint2[i];
184 fPoint3[i]=tracker.fPoint3[i];
185 fPointc[i]=tracker.fPointc[i];
186 }
13918578 187 if(tracker.fVertexer && tracker.fVert){
d681bb2d 188 fVert = new AliESDVertex(*tracker.fVert);
13918578 189 }
190 else {
191 fVert = tracker.fVert;
192 }
cc088660 193 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 194 fCluLayer[i] = tracker.fCluLayer[i];
195 fCluCoord[i] = tracker.fCluCoord[i];
196 }
13918578 197}
7d62fb64 198//______________________________________________________________________
e399f961 199AliITStrackerSA& AliITStrackerSA::operator=(const AliITStrackerSA& source){
200 // Assignment operator.
201 this->~AliITStrackerSA();
202 new(this) AliITStrackerSA(source);
203 return *this;
204
7d62fb64 205}
13918578 206
207//____________________________________________________________________________
208AliITStrackerSA::~AliITStrackerSA(){
209 // destructor
d681bb2d 210 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
13918578 211 // and is deleted here
212 if(fVertexer){
213 if(fVert)delete fVert;
214 }
215 fVert = 0;
216 fVertexer = 0;
7e5bf5af 217
13918578 218 if(fPhiWin)delete []fPhiWin;
219 if(fLambdaWin)delete []fLambdaWin;
4e05ab9a 220 fListOfTracks->Delete();
adda6c2b 221 delete fListOfTracks;
7e5bf5af 222 if(fCluLayer){
cc088660 223 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 224 if(fCluLayer[i]){
225 fCluLayer[i]->Delete();
226 delete fCluLayer[i];
227 }
228 }
229 delete [] fCluLayer;
230 }
231 if(fCluCoord){
cc088660 232 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
7e5bf5af 233 if(fCluCoord[i]){
234 fCluCoord[i]->Delete();
235 delete fCluCoord[i];
236 }
237 }
238 delete [] fCluCoord;
627b6db6 239 }
7e5bf5af 240
7e5bf5af 241}
13918578 242
1966f03c 243//____________________________________________________________________________
af885e0f 244Int_t AliITStrackerSA::Clusters2Tracks(AliESDEvent *event){
1966f03c 245// This method is used to find and fit the tracks. By default the corresponding
246// method in the parent class is invoked. In this way a combined tracking
247// TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
248// is done in the ITS only. In the standard reconstruction chain this option
249// can be set via AliReconstruction::SetOption("ITS","onlyITS")
250 Int_t rc=0;
251 if(!fITSStandAlone){
252 rc=AliITStrackerMI::Clusters2Tracks(event);
253 }
254 else {
255 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
256 }
257 if(!rc) rc=FindTracks(event);
258 return rc;
259}
260
13918578 261//____________________________________________________________________________
262void AliITStrackerSA::Init(){
263 // Reset all data members
264 fPhiEstimate=0;
265 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
266 fLambdac=0;
267 fPhic=0;
268 fCoef1=0;
269 fCoef2=0;
270 fCoef3=0;
271 fPointc[0]=0;
272 fPointc[1]=0;
273 fVert = 0;
274 fVertexer = 0;
13918578 275 SetWindowSizes();
2257f27e 276 fITSclusters = 0;
277 SetSixPoints();
b8ed1a92 278 SetOuterStartLayer(0);
1966f03c 279 SetSAFlag(kFALSE);
4e05ab9a 280 fListOfTracks=new TObjArray(0,0);
7e5bf5af 281 fCluLayer = 0;
282 fCluCoord = 0;
627b6db6 283 }
13918578 284//_______________________________________________________________________
285void AliITStrackerSA::ResetForFinding(){
286 // Reset data members used in all loops during track finding
287 fPhiEstimate=0;
288 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
289 fLambdac=0;
290 fPhic=0;
291 fCoef1=0;
292 fCoef2=0;
293 fCoef3=0;
294 fPointc[0]=0;
295 fPointc[1]=0;
4e05ab9a 296 fListOfTracks->Delete();
13918578 297}
bef31448 298
7e5bf5af 299
2257f27e 300
bef31448 301//______________________________________________________________________
af885e0f 302Int_t AliITStrackerSA::FindTracks(AliESDEvent* event){
bef31448 303
7e5bf5af 304// Track finder using the ESD object
305
2257f27e 306
7e5bf5af 307 //controllare numero cluster sui layer1 e 2 (morti?)
308 //non trova tracce...controllare..
4e05ab9a 309
2257f27e 310 if(!fITSclusters){
311 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
312 return -1;
bef31448 313 }
7e5bf5af 314
315
316 //Reads event and mark clusters of traks already found, with flag kITSin
ebda3140 317 Int_t nentr=event->GetNumberOfTracks();
318 while (nentr--) {
319 AliESDtrack *track=event->GetTrack(nentr);
320 if (track->GetStatus()&AliESDtrack::kITSin==AliESDtrack::kITSin){
321 Int_t idx[12];
322 Int_t ncl = track->GetITSclusters(idx);
323 for(Int_t k=0;k<ncl;k++){
324 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
325 cll->SetBit(kSAflag);
326 }
327 }
328 }
329 //Get primary vertex
330 Double_t primaryVertex[3];
331 event->GetVertex()->GetXYZ(primaryVertex);
332 //Creates TClonesArray with clusters for each layer. The clusters already used
333 //by AliITStrackerMI are not considered
334 Int_t nclusters[6]={0,0,0,0,0,0};
335 Int_t dmar[6]={0,0,0,0,0,0};
336 if (fCluLayer == 0) {
337 fCluLayer = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
338 fCluCoord = new TClonesArray*[AliITSgeomTGeo::GetNLayers()];
339 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
340 fCluLayer[i]=0;
341 fCluCoord[i]=0;
342 }
343 }
344 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
345 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
346 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
347 AliITSlayer &layer=fgLayers[i];
25be2b21 348 if (!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) {
349 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
350 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
351 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
352 if(cls->GetQ()==0) continue; //fake clusters dead zones
353 nclusters[i]++;
354 }
ebda3140 355 }
356 dmar[i]=0;
357 delete fCluLayer[i];
358 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
359 delete fCluCoord[i];
360 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
361 }
362
363 for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
364 TClonesArray &clulay = *fCluLayer[ilay];
365 TClonesArray &clucoo = *fCluCoord[ilay];
366 AliITSlayer &layer=fgLayers[ilay];
25be2b21 367 if (!AliITSReconstructor::GetRecoParam()->GetLayersToSkip(ilay)) {
368 for(Int_t cli=0;cli<layer.GetNumberOfClusters();cli++){
369 AliITSRecPoint* cls = (AliITSRecPoint*)layer.GetCluster(cli);
370 if(cls->TestBit(kSAflag)==kTRUE) continue;
371 if(cls->GetQ()==0) continue;
372 Double_t phi=0;Double_t lambda=0;
373 Float_t x=0;Float_t y=0;Float_t z=0;
374 Float_t sx=0;Float_t sy=0;Float_t sz=0;
375 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
376 GetCoorErrors(cls,sx,sy,sz);
377 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
378 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
379 dmar[ilay]++;
380 }
ebda3140 381 }
382 }
7e5bf5af 383
ebda3140 384 Int_t minNPoints = (fSixPoints ? AliITSgeomTGeo::GetNLayers() : AliITSgeomTGeo::GetNLayers()-1);
385 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
386 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i)) {
387 minNPoints--;
388 }
389 }
7e5bf5af 390
391
ebda3140 392 Int_t ntrack=0;
393 //loop on the different windows
394 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()];//counter for clusters on each layer
395 for(Int_t nloop=0;nloop<fNloop;nloop++){
396 for(Int_t ncl=0;ncl<fCluLayer[0]->GetEntries();ncl++){ //loop starting from layer 0
397
398 ResetForFinding();
399 Int_t pflag=0;
400
401 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[0]->At(ncl);
402
403 if(!cl) continue;
404 if (cl->GetQ()<=0) continue;
405
406 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(0,ncl);
407 fPhic = arr->GetPhi();
408 fLambdac = arr->GetLambda();
409 if (TMath::Abs(fLambdac)>0.26*TMath::Pi()) continue;
410 fPhiEstimate = fPhic;
411 AliITStrackSA* trs = new AliITStrackSA();
412 fPoint1[0]=primaryVertex[0];
413 fPoint1[1]=primaryVertex[1];
414
415
416 fPoint2[0]=arr->GetX();
417 fPoint2[1]=arr->GetY();
418 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){ nn[i]=0;}
419 nn[0] = SearchClusters(0,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
420 nn[1] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 421 if(nn[1]>0){
422 pflag=1;
423 fPoint3[0] = fPointc[0];
424 fPoint3[1] = fPointc[1];
425 }
cfe729e0 426 nn[2] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 427 if(nn[1]==0 && nn[2]==0) pflag=0;
428 if(nn[2]!=0 && nn[1]!=0){ pflag=1; UpdatePoints();}
429 if(nn[2]!=0 && nn[1]==0){
430 pflag=1;
431 fPoint3[0]=fPointc[0];
432 fPoint3[1]=fPointc[1];
433 }
13918578 434
cfe729e0 435 nn[3] = SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 436 pflag=1;
437 if(nn[3]!=0) UpdatePoints();
cfe729e0 438 nn[4] = SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 439 pflag=1;
440 if(nn[4]!=0) UpdatePoints();
cfe729e0 441 nn[5] = SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],trs,primaryVertex[2],pflag);
bef31448 442
443
444 Int_t layOK=0;
2755f080 445 //check of the candidate track
446 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers();nnp++) {
bef31448 447 if(nn[nnp]!=0) layOK+=1;
448 }
7e5bf5af 449
2755f080 450 if(layOK>=minNPoints){
451 AliITStrackV2* tr2 = 0;
ebda3140 452 tr2 = FitTrack(trs,primaryVertex);
2755f080 453 if(!tr2) continue;
7e5bf5af 454
bef31448 455 AliESDtrack outtrack;
456 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
457 event->AddTrack(&outtrack);
bef31448 458 ntrack++;
bef31448 459 }
460 delete trs;
7e5bf5af 461 }//end loop on clusters of layer1
7e5bf5af 462 //end loop2
ebda3140 463 }
2755f080 464
ebda3140 465 delete[] nn;
2755f080 466
7e5bf5af 467
ebda3140 468 minNPoints--;
7e5bf5af 469
ebda3140 470 //if 5/6 points are required, second loop starting
471 //from second layer (SPD2), to find tracks with point of
472 //layer 1 missing
473 if(!fSixPoints) {
474 //printf("looking from SPD2\n");
475 // counter for clusters on each layer
476 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-1];
477 for(Int_t nloop=0;nloop<fNloop;nloop++){
478 Int_t ncl2=fCluLayer[1]->GetEntries();
479 while(ncl2--){ //loop starting from layer 2
480 ResetForFinding();
481 Int_t pflag=0;
482 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[1]->At(ncl2);
483
484 if(!cl) continue;
485 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(1,ncl2);
486 fPhic = arr->GetPhi();
487 fLambdac = arr->GetLambda();
488 fPhiEstimate = fPhic;
489
490 AliITStrackSA* trs = new AliITStrackSA();
491 fPoint1[0]=primaryVertex[0];
492 fPoint1[1]=primaryVertex[1];
493
494 fPoint2[0]=arr->GetX();
495 fPoint2[1]=arr->GetY();
496 for(Int_t kk=0;kk<AliITSgeomTGeo::GetNLayers()-1;kk++)nn[kk] = 0;
497 nn[0] = SearchClusters(1,fPhiWin[nloop],fLambdaWin[nloop],
498 trs,primaryVertex[2],pflag);
499 nn[1] = SearchClusters(2,fPhiWin[nloop],fLambdaWin[nloop],
500 trs,primaryVertex[2],pflag);
501 if(nn[1]!=0){
502 pflag=1;
503 fPoint3[0]=fPointc[0];
504 fPoint3[1]=fPointc[1];
505 }
506 nn[2]= SearchClusters(3,fPhiWin[nloop],fLambdaWin[nloop],
507 trs,primaryVertex[2],pflag);
508 if(nn[2]!=0){
509 pflag=1;
510 UpdatePoints();
511 }
512 nn[3]= SearchClusters(4,fPhiWin[nloop],fLambdaWin[nloop],
513 trs,primaryVertex[2],pflag);
514 if(nn[3]!=0){
515 pflag=1;
516 UpdatePoints();
517 }
518 nn[4]=SearchClusters(5,fPhiWin[nloop],fLambdaWin[nloop],
519 trs,primaryVertex[2],pflag);
520
521 Int_t fl=0;
522 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-1;nnp++){
523 if(nn[nnp]!=0) fl+=1;
524 }
525 if(fl>=minNPoints){ // 5/6
526 AliITStrackV2* tr2 = 0;
527 tr2 = FitTrack(trs,primaryVertex);
528 if(!tr2) continue;
529
530 AliESDtrack outtrack;
531 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
532 event->AddTrack(&outtrack);
533 ntrack++;
534
535 }
536
bef31448 537 delete trs;
538 }//end loop on clusters of layer2
ebda3140 539 }
540
541 delete [] nn;
542 } //end opt="5/6"
543
544 // search for tracks starting from SPD2, SDD1, SDD2, SSD2
545 // for cosmics (A. Dainese 31.07.07)
546 if(fOuterStartLayer>0) {
547 for(Int_t innLay=1; innLay<=fOuterStartLayer; innLay++) {
548 //printf("Searching from layer %d outward\n",innLay);
549 minNPoints=AliITSgeomTGeo::GetNLayers()-innLay;
550 for(Int_t i=innLay;i<AliITSgeomTGeo::GetNLayers();i++)
551 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(i))
552 minNPoints--;
553 // counter for clusters on each layer
554 Int_t * nn = new Int_t[AliITSgeomTGeo::GetNLayers()-innLay];
555 for(Int_t nloop=0;nloop<fNloop;nloop++){
556 Int_t nclInnLay=fCluLayer[innLay]->GetEntries();
557 while(nclInnLay--){ //loop starting from layer innLay
558 ResetForFinding();
559 Int_t pflag=0;
560 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[innLay]->At(nclInnLay);
561
562 if(!cl) continue;
563 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(innLay,nclInnLay);
564 fPhic = arr->GetPhi();
565 fLambdac = arr->GetLambda();
566 fPhiEstimate = fPhic;
567
568 AliITStrackSA* trs = new AliITStrackSA();
569 fPoint1[0]=primaryVertex[0];
570 fPoint1[1]=primaryVertex[1];
571 fPoint2[0]=arr->GetX();
572 fPoint2[1]=arr->GetY();
573
574 Int_t kk;
575 for(kk=0;kk<AliITSgeomTGeo::GetNLayers()-innLay;kk++) nn[kk] = 0;
576
577 kk=0;
578 nn[kk] = SearchClusters(innLay,fPhiWin[nloop],fLambdaWin[nloop],
b8ed1a92 579 trs,primaryVertex[2],pflag);
ebda3140 580 for(Int_t nextLay=innLay+1; nextLay<AliITSgeomTGeo::GetNLayers(); nextLay++) {
581 kk++;
582 nn[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
583 trs,primaryVertex[2],pflag);
584 if(nn[kk]!=0){
585 pflag=1;
586 if(kk==1) {
587 fPoint3[0]=fPointc[0];
588 fPoint3[1]=fPointc[1];
589 } else {
590 UpdatePoints();
591 }
592 }
593 }
594
595 Int_t fl=0;
596 for(Int_t nnp=0;nnp<AliITSgeomTGeo::GetNLayers()-innLay;nnp++){
597 if(nn[nnp]!=0) fl+=1;
598 }
599 if(fl>=minNPoints){
600 AliITStrackV2* tr2 = 0;
601 tr2 = FitTrack(trs,primaryVertex);
602 if(!tr2) continue;
603
604
605 AliESDtrack outtrack;
606 outtrack.UpdateTrackParams(tr2,AliESDtrack::kITSin);
607 event->AddTrack(&outtrack);
608 ntrack++;
609
610 }
611
612 delete trs;
613 }//end loop on clusters of innLay
614 } //end loop on window sizes
615
616 delete [] nn;
617 } //end loop on innLay
618 } //end if(fOuterStartLayer>0)
619
620
bef31448 621 delete [] firstmod;
bef31448 622 Info("FindTracks","Number of found tracks: %d",event->GetNumberOfTracks());
2257f27e 623 return 0;
bef31448 624
625}
7e5bf5af 626
13918578 627//________________________________________________________________________
628
ebda3140 629AliITStrackV2* AliITStrackerSA::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex) {
630 //fit of the found track (most general case, also <6 points, layers missing)
631 // A.Dainese 16.11.07
13918578 632
13918578 633
cc088660 634 Int_t * firstmod = new Int_t[AliITSgeomTGeo::GetNLayers()];
cc088660 635 TObjArray** listlayer = new TObjArray*[AliITSgeomTGeo::GetNLayers()];
ebda3140 636 Int_t ** clind=new Int_t*[AliITSgeomTGeo::GetNLayers()];
637 Int_t ** clmark=new Int_t*[AliITSgeomTGeo::GetNLayers()];
cc088660 638 Int_t * nnn = new Int_t[AliITSgeomTGeo::GetNLayers()];
639 Int_t * kkk = new Int_t[AliITSgeomTGeo::GetNLayers()];
13918578 640
ebda3140 641 const Int_t maxclu=AliITStrackSA::GetMaxNumberOfClusters();
13918578 642
ebda3140 643 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
b8ed1a92 644 firstmod[i]=AliITSgeomTGeo::GetModuleIndex(i+1,1,1);
b8ed1a92 645 listlayer[i] = new TObjArray(0,0);
ebda3140 646 nnn[i]=0;
647 kkk[i]=0;
648 clind[i]=new Int_t[maxclu];
649 clmark[i]=new Int_t[maxclu];
650 for(Int_t j=0;j<maxclu; j++){
651 clind[i][j]=0;
652 clmark[i][j]=0;
b8ed1a92 653 }
654 }
2755f080 655
2755f080 656
657 Int_t nclusters = tr->GetNumberOfClustersSA();
2755f080 658 for(Int_t ncl=0;ncl<nclusters;ncl++){
659 Int_t index = tr->GetClusterIndexSA(ncl);
660 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
661 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
662 Int_t lay = (index & 0xf0000000) >> 28;
ebda3140 663 listlayer[lay]->AddLast(cl);
664 Int_t ind=nnn[lay];
665 clind[lay][ind]=index;
2755f080 666 }
667 delete [] nnn;
668
669 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
670 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
671 Int_t mark = tr->GetClusterMark(nlay,ncl);
ebda3140 672 Int_t ind=kkk[nlay];
673 clmark[nlay][ind]=mark;
2755f080 674 }
675 }
676
677 delete [] kkk;
678
679 Int_t firstLay=-1,secondLay=-1;
680 Int_t * end = new Int_t[AliITSgeomTGeo::GetNLayers()];
681 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
682 if(listlayer[i]->GetEntries()==0) {
683 end[i]=1;
684 } else {
685 end[i]=listlayer[i]->GetEntries();
686 if(firstLay==-1) {
687 firstLay=i;
688 } else if(secondLay==-1) {
689 secondLay=i;
690 }
691 }
692 }
693
225a692b 694 if(firstLay==-1 || secondLay==-1) {
695 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
696 delete listlayer[i];
697 delete clind[i];
698 delete clmark[i];
699 }
700 delete [] listlayer;
701 delete [] clind;
702 delete [] clmark;
703 delete [] firstmod;
704 delete [] end;
705 return 0;
706 }
707
2755f080 708 TClonesArray* listSA = new TClonesArray("AliITStrackSA");
709 TClonesArray &tri = *listSA;
710 Int_t nlist=0;
711
712 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
713 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0]->At(l0);
714 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
715 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1]->At(l1);
716 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
717 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2]->At(l2);
718 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
719 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3]->At(l3);
720 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
721 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4]->At(l4);
722 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
723 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5]->At(l5);
724
725
726 Double_t x1,y1,z1,sx1,sy1,sz1;
727 Double_t x2,y2,z2,sx2,sy2,sz2;
728 AliITSRecPoint* p1=0;
729 AliITSRecPoint* p2=0;
730 Int_t index1=0,index2=0;
731 Int_t mrk1=0,mrk2=0;
732
733 switch(firstLay) {
734 case 0:
735 p1=cl0;
ebda3140 736 index1=clind[0][l0];mrk1=clmark[0][l0];
2755f080 737 break;
738 case 1:
739 p1=cl1;
ebda3140 740 index1=clind[1][l1];mrk1=clmark[1][l1];
2755f080 741 break;
742 case 2:
743 p1=cl2;
ebda3140 744 index1=clind[2][l2];mrk1=clmark[2][l2];
2755f080 745 break;
746 case 3:
747 p1=cl3;
ebda3140 748 index1=clind[3][l3];mrk1=clmark[3][l3];
2755f080 749 break;
750 case 4:
751 p1=cl4;
ebda3140 752 index1=clind[4][l4];mrk1=clmark[4][l4];
2755f080 753 break;
754 }
755
756 switch(secondLay) {
757 case 1:
758 p2=cl1;
ebda3140 759 index2=clind[1][l1];mrk2=clmark[1][l1];
2755f080 760 break;
761 case 2:
762 p2=cl2;
ebda3140 763 index2=clind[2][l2];mrk2=clmark[2][l2];
2755f080 764 break;
765 case 3:
766 p2=cl3;
ebda3140 767 index2=clind[3][l3];mrk2=clmark[3][l3];
2755f080 768 break;
769 case 4:
770 p2=cl4;
ebda3140 771 index2=clind[4][l4];mrk2=clmark[4][l4];
2755f080 772 break;
773 case 5:
774 p2=cl5;
ebda3140 775 index2=clind[5][l5];mrk2=clmark[5][l5];
2755f080 776 break;
777 }
778
779 Int_t module1 = p1->GetDetectorIndex()+firstmod[firstLay];
780
781 Int_t cln1=mrk1;
782 Int_t cln2=mrk2;
783 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1);
784 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2);
785 x1 = arr1->GetX();
786 x2 = arr2->GetX();
787 y1 = arr1->GetY();
788 y2 = arr2->GetY();
789 z1 = arr1->GetZ();
790 z2 = arr2->GetZ();
791 sx1 = arr1->GetSx();
792 sx2 = arr2->GetSx();
793 sy1 = arr1->GetSy();
794 sy2 = arr2->GetSy();
795 sz1 = arr1->GetSz();
796 sz2 = arr2->GetSz();
225a692b 797
2755f080 798 Int_t layer,ladder,detector;
799 AliITSgeomTGeo::GetModuleId(module1,layer,ladder,detector);
800 Float_t yclu1 = p1->GetY();
801 Float_t zclu1 = p1->GetZ();
802 Double_t cv=Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
803 Double_t tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
804 Double_t phi2 = TMath::ATan2((y2-y1),(x2-x1));
805 AliITStrackSA* trac = new AliITStrackSA(layer,ladder,detector,yclu1,zclu1,phi2,tgl2,cv,1);
225a692b 806
807
2755f080 808 if(cl5!=0) {
ebda3140 809 trac->AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0);
810 trac->AddClusterMark(5,clmark[5][l5]);
b8ed1a92 811 }
812 if(cl4!=0){
ebda3140 813 trac->AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0);
814 trac->AddClusterMark(4,clmark[4][l4]);
b8ed1a92 815 }
816 if(cl3!=0){
ebda3140 817 trac->AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0);
818 trac->AddClusterMark(3,clmark[3][l3]);
b8ed1a92 819 }
820 if(cl2!=0){
ebda3140 821 trac->AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0);
822 trac->AddClusterMark(2,clmark[2][l2]);
b8ed1a92 823 }
824 if(cl1!=0){
ebda3140 825 trac->AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0);
826 trac->AddClusterMark(1,clmark[1][l1]);
b8ed1a92 827 }
828 if(cl0!=0){
ebda3140 829 trac->AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0);
830 trac->AddClusterMark(0,clmark[0][l0]);
b8ed1a92 831 }
832
b8ed1a92 833 //fit with Kalman filter using AliITStrackerMI::RefitAt()
834 AliITStrackMI* ot = new AliITStrackSA(*trac);
835
836 ot->ResetCovariance(10.);
837 ot->ResetClusters();
838
e50912db 839 if(RefitAt(AliITSRecoParam::GetrInsideITSscreen(),ot,trac)){ //fit from layer 1 to layer 6
b8ed1a92 840 AliITStrackMI *otrack2 = new AliITStrackMI(*ot);
841 otrack2->ResetCovariance(10.);
842 otrack2->ResetClusters();
843 //fit from layer 6 to layer 1
e50912db 844 if(RefitAt(AliITSRecoParam::GetrInsideSPD1(),otrack2,ot)) {
b8ed1a92 845 fListOfTracks->AddLast(otrack2);
846 new (tri[nlist]) AliITStrackSA(*trac);
847 nlist++;
848 } else {
849 delete otrack2;
850 }
851
852 }
853
854 delete ot;
855 delete trac;
856 }//end loop layer 6
857 }//end loop layer 5
858 }//end loop layer 4
859 }//end loop layer 3
860 }//end loop layer 2
861 }//end loop layer 1
862
863 delete [] end;
864
225a692b 865
b8ed1a92 866
867 Int_t dim=fListOfTracks->GetEntries();
868 if(dim==0){
869 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
870 delete listlayer[i];
ebda3140 871 delete clind[i];
872 delete clmark[i];
b8ed1a92 873 }
874 delete [] listlayer;
ebda3140 875 delete [] clind;
876 delete [] clmark;
b8ed1a92 877 listSA->Delete();
878 delete listSA;
879 delete [] firstmod;
880 return 0;
881 }
882
883 Int_t lowchi2 = FindTrackLowChiSquare(fListOfTracks,dim);
884 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
885 AliITStrackSA* trsa = (AliITStrackSA*)listSA->At(lowchi2);
886
887 if(otrack==0) {
888 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
889 delete listlayer[i];
ebda3140 890 delete clind[i];
891 delete clmark[i];
b8ed1a92 892 }
893 delete [] listlayer;
ebda3140 894 delete [] clind;
895 delete [] clmark;
b8ed1a92 896 listSA->Delete();
897 delete listSA;
898 delete [] firstmod;
ebda3140 899 delete [] clind;
900 delete [] clmark;
b8ed1a92 901 return 0;
902 }
903 Int_t * indexc = new Int_t[AliITSgeomTGeo::GetNLayers()];
904 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) indexc[i]=0;
905 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
906 indexc[nind] = otrack->GetClusterIndex(nind);
907 }
908 Int_t labl[6][3];
909 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++) {
910 if(i<otrack->GetNumberOfClusters()) {
911 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc[i]);
912 labl[i][0]=cl->GetLabel(0);
913 labl[i][1]=cl->GetLabel(1);
914 labl[i][2]=cl->GetLabel(2);
915 } else {
916 labl[i][0]=-1;
917 labl[i][1]=-1;
918 labl[i][2]=-1;
919 }
920 }
921 delete [] indexc;
2755f080 922
b8ed1a92 923 CookLabel(otrack,0.); //MI change - to see fake ratio
924
925 Int_t label=FindLabel(labl[0][0],labl[1][0],labl[2][0],labl[3][0],labl[4][0],labl[5][0]);
926 Int_t lflag=0;
2755f080 927 for(Int_t i=0;i<otrack->GetNumberOfClusters();i++)
b8ed1a92 928 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
929
2755f080 930 if(lflag<otrack->GetNumberOfClusters()) label = -label;
b8ed1a92 931 otrack->SetLabel(label);
932
933 //remove clusters of found track
934 for(Int_t nlay=0;nlay<AliITSgeomTGeo::GetNLayers();nlay++){
935 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
936 Int_t index = trsa->GetClusterMark(nlay,cln);
937 fCluLayer[nlay]->RemoveAt(index);
938 RemoveClusterCoord(nlay,index);
939 fCluLayer[nlay]->Compress();
7e5bf5af 940 }
941 }
942 listSA->Delete();
943 delete listSA;
944
cc088660 945 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
13918578 946 delete listlayer[i];
ebda3140 947 delete clind[i];
948 delete clmark[i];
13918578 949 }
c09cece6 950 delete [] listlayer;
037efb75 951 delete [] firstmod;
ebda3140 952 delete [] clind;
953 delete [] clmark;
13918578 954 return otrack;
955
956}
957
bef31448 958
4e05ab9a 959
bef31448 960//_______________________________________________________
7e5bf5af 961Int_t AliITStrackerSA::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){
13918578 962 //function used to to find the clusters associated to the track
2755f080 963
964 if(AliITSReconstructor::GetRecoParam()->GetLayersToSkip(layer)) return 0;
965
13918578 966 Int_t nc=0;
967 AliITSlayer &lay = fgLayers[layer];
7e5bf5af 968 Double_t r=lay.GetR();
2755f080 969 if(pflag==1){
cfe729e0 970 Float_t cx1,cx2,cy1,cy2;
971 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
972 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
973 return 0;
1966f03c 974 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
975 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
cfe729e0 976 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
977 }
13918578 978
7e5bf5af 979
980 Int_t ncl = fCluLayer[layer]->GetEntries();
981 for (Int_t index=0; index<ncl; index++) {
00a7cc50 982 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
7e5bf5af 983 if (!c) continue;
984 if (c->GetQ()<=0) continue;
985
986 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
987 Double_t phi = arr->GetPhi();
cfe729e0 988 if (TMath::Abs(phi-fPhiEstimate)>phiwindow) continue;
494fda7c 989
7e5bf5af 990 Double_t lambda = arr->GetLambda();
cfe729e0 991 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
992
7e5bf5af 993 if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0;
994 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
995 Int_t orind = arr->GetOrInd();
996 trs->AddClusterSA(layer,orind);
997 trs->AddClusterMark(layer,index);
998
cfe729e0 999 nc++;
1000 fLambdac=lambda;
1001 fPhiEstimate=phi;
cfe729e0 1002
7e5bf5af 1003 fPointc[0]=arr->GetX();
1004 fPointc[1]=arr->GetY();
1005
cfe729e0 1006 }
1007 return nc;
1008}
13918578 1009
bef31448 1010//________________________________________________________________
1011void AliITStrackerSA::UpdatePoints(){
1012 //update of points for the estimation of the curvature
13918578 1013
bef31448 1014 fPoint2[0]=fPoint3[0];
1015 fPoint2[1]=fPoint3[1];
1016 fPoint3[0]=fPointc[0];
1017 fPoint3[1]=fPointc[1];
13918578 1018
1019
13918578 1020}
13918578 1021
13918578 1022//___________________________________________________________________
1023Int_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){
1024
1025 //given (x,y) of three recpoints (in global coordinates)
1026 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
1027
1028 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1029 if(den==0) return 0;
1030 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1031 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1032 c = -x1*x1-y1*y1-a*x1-b*y1;
1033 return 1;
1034 }
1035//__________________________________________________________________________
1036 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){
1037
1038 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
1039 //c2 is -rlayer*rlayer
1040
1041 if(a1==0) return 0;
3a2f227d 1042 Double_t m = c2-c1;
1043 Double_t aA = (b1*b1)/(a1*a1)+1;
1044 Double_t bB = (-2*m*b1/(a1*a1));
1045 Double_t cC = c2+(m*m)/(a1*a1);
1046 Double_t dD = bB*bB-4*aA*cC;
1047 if(dD<0) return 0;
13918578 1048
3a2f227d 1049 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
1050 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
13918578 1051 x1 = (c2-c1-b1*y1)/a1;
1052 x2 = (c2-c1-b1*y2)/a1;
1053
1054 return 1;
1055}
1056//____________________________________________________________________
1057Double_t AliITStrackerSA::Curvature(Double_t x1,Double_t y1,Double_t
1058x2,Double_t y2,Double_t x3,Double_t y3){
1059
1060 //calculates the curvature of track
1061 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
1062 if(den==0) return 0;
1063 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
1064 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
1065 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
1066 Double_t xc=-a/2.;
1067
1068 if((a*a+b*b-4*c)<0) return 0;
1069 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
1070 if(rad==0) return 0;
1071
1072 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
1073 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
1074 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
1075 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
1076
1077 return 1/rad;
1078
1079}
7e5bf5af 1080
1081
13918578 1082//____________________________________________________________________
1083Double_t AliITStrackerSA::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
1084
1085 //Returns the point closest to pp
1086
1087 Double_t diff1 = p1-pp;
1088 Double_t diff2 = p2-pp;
1089
1090 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
1091 else fPhiEstimate=p2;
1092 return fPhiEstimate;
1093
1094}
1095
1096
1097//_________________________________________________________________
7e5bf5af 1098Int_t AliITStrackerSA::FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const {
52a9777e 1099 // returns track with lowers chi square
13918578 1100 if(dim==1){
7e5bf5af 1101 //AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(0);
1102 //return trk;
1103 return 0;
13918578 1104 }
52a9777e 1105 if(dim==0) return 0;
037efb75 1106 Double_t * chi2 = new Double_t[dim];
1107 Int_t * index = new Int_t[dim];
13918578 1108 for(Int_t i=0;i<dim;i++){
1109 AliITStrackV2* trk = (AliITStrackV2*)tracklist->At(i);
1110 chi2[i]=trk->GetChi2();
1111 index[i]=i;
1112 }
1113
1114 Int_t w=0;Double_t value;
1115 Int_t lp;
1116 while(w<dim){
1117 for(Int_t j=w+1;j<dim;j++){
1118 if(chi2[w]<chi2[j]){
bef31448 1119 value=chi2[w];
1120 chi2[w]=chi2[j];
1121 chi2[j]=value;
1122 lp=index[w];
1123 index[w]=index[j];
1124 index[j]=lp;
13918578 1125 }
1126 }
1127 w++;
1128 }
52a9777e 1129 Int_t tmp = index[dim-1];
037efb75 1130 delete [] chi2;
1131 delete [] index;
52a9777e 1132 return tmp;
13918578 1133}
1134
1135//__________________________________________________________
2755f080 1136Int_t AliITStrackerSA::FindLabel(Int_t l0, Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5){
13918578 1137
1138 //function used to determine the track label
1139
2755f080 1140 Int_t lb[6] = {l0,l1,l2,l3,l4,l5};
13918578 1141 Int_t aa[6]={1,1,1,1,1,1};
1142 Int_t ff=0;
1143 Int_t ll=0;
1144 Int_t k=0;Int_t w=0;Int_t num=6;
8b3779ef 1145 for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i;
13918578 1146
1147 while(k<num){
1148
1149 for(Int_t i=k+1;i<num;i++){
1150
1151 if(lb[k]==lb[i] && aa[k]!=0){
1152
1153 aa[k]+=1;
1154 aa[i]=0;
1155 }
1156 }
8b3779ef 1157 k++;
13918578 1158 }
1159
1160 while(w<num){
8b3779ef 1161
13918578 1162 for(Int_t j=0;j<6;j++){
1163 if(aa[w]<aa[j]){
1164 ff=aa[w];
1165 aa[w]=aa[j];
1166 aa[j]=ff;
1167 ll=lb[w];
1168 lb[w]=lb[j];
1169 lb[j]=ll;
1170 }
1171 }
8b3779ef 1172 w++;
13918578 1173 }
8b3779ef 1174
1175 if(num<1) return -1;
1176 return lb[num-1];
13918578 1177}
1178
1179//_____________________________________________________________________________
1180Int_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 1181Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){
13918578 1182
1183
1184 //function used to assign label to the found track. If track is fake, the label is negative
1185
1186 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1187 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1188 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1189 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1190 Int_t lflag=0;Int_t num=6;
1191 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1192
1193 for(Int_t i=0;i<num;i++){
1194 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1195 }
1196
2755f080 1197 if(lflag>=minNPoints) return ll;
13918578 1198 else return -ll;
1199
1200
1201}
1202
1203//_____________________________________________________________________________
1204void AliITStrackerSA::SetWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1205 // Set sizes of the phi and lambda windows used for track finding
1206 fNloop = n;
1207 if(phi){ // user defined values
1208 fPhiWin = new Double_t[fNloop];
1209 fLambdaWin = new Double_t[fNloop];
1210 for(Int_t k=0;k<fNloop;k++){
1211 fPhiWin[k]=phi[k];
1212 fLambdaWin[k]=lam[k];
1213 }
1214 }
1215 else { // default values
627b6db6 1216
1217 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
bef31448 1218 0.005,0.0053,0.0055,
1219 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1220 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
627b6db6 1221 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1222 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1223 0.005,0.005,0.006,
1224 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1225 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1226 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
bef31448 1227
627b6db6 1228 if(fNloop!=33){
1229 fNloop = 33;
13918578 1230 }
627b6db6 1231
1232
13918578 1233 fPhiWin = new Double_t[fNloop];
1234 fLambdaWin = new Double_t[fNloop];
e340bb86 1235
e340bb86 1236 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes(); // possibility to enlarge windows for cosmics reco with large misalignments (A.Dainese)
2755f080 1237
1238 for(Int_t k=0;k<fNloop;k++){
e340bb86 1239 fPhiWin[k]=phid[k]*factor;
1240 fLambdaWin[k]=lambdad[k]*factor;
13918578 1241 }
1242
1243 }
1244
1245}
7e5bf5af 1246//_______________________________________________________________________
cc088660 1247void AliITStrackerSA::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Float_t &x, Float_t &y,Float_t &z,Double_t* vertex){
7e5bf5af 1248 //Returns values of phi (azimuthal) and lambda angles for a given cluster
cc088660 1249/*
7e5bf5af 1250 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1251 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1252 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1253
1254 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1255 Double_t phi1=TMath::Pi()/2+alpha;
1256 if (lay==1) phi1+=TMath::Pi();
1257
1258 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1259 Float_t r=tx*cp+ty*sp;
1260
cc088660 1261 xyz= r*cp - cl->GetY()*sp;
7e5bf5af 1262 y= r*sp + cl->GetY()*cp;
1263 z=cl->GetZ();
cc088660 1264*/
1265 Float_t xyz[3];
1266 cl->GetGlobalXYZ(xyz);
1267 x=xyz[0];
1268 y=xyz[1];
1269 z=xyz[2];
1270
1966f03c 1271 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
7e5bf5af 1272 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1273}
13918578 1274
7e5bf5af 1275//________________________________________________________________________
cc088660 1276void AliITStrackerSA::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
7e5bf5af 1277
cc088660 1278 //returns sigmax, y, z of cluster in global coordinates
1279/*
7e5bf5af 1280 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
cc088660 1281 Int_t lay,lad,det;
1282 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
7e5bf5af 1283
1284 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1285 Double_t phi=TMath::Pi()/2+alpha;
1286 if (lay==1) phi+=TMath::Pi();
1287
1288 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
cc088660 1289*/
1290 Float_t covm[6];
1291 cl->GetGlobalCov(covm);
1292 sx=TMath::Sqrt(covm[0]);
1293 sy=TMath::Sqrt(covm[3]);
1294 sz=TMath::Sqrt(covm[5]);
1295/*
7e5bf5af 1296 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1297 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1298 sz = TMath::Sqrt(cl->GetSigmaZ2());
cc088660 1299*/
7e5bf5af 1300}