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Added version tailored for pp (AliTrackletTaskMultipp) with additional
[u/mrichter/AliRoot.git] / ITS / UPGRADE / AliITStrackerUpgrade.cxx
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1d9af2d5 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// ITS Upgrade Stand alone tracker class //
20// Authors: A.Mastroserio C.Terrevoli //
21// e-mail:annalisa.mastroserio@cern.ch //
22// cristina.terrevoli@ba.infn.it //
23////////////////////////////////////////////////////
24
25#include <stdlib.h>
26
27#include <TArrayI.h>
28#include <TBranch.h>
29#include <TObjArray.h>
30#include <TTree.h>
31#include "AliRunLoader.h"
32#include "AliITSLoader.h"
33#include "AliESDEvent.h"
34#include "AliESDVertex.h"
35#include "AliESDtrack.h"
36#include "AliITSVertexer.h"
37#include "AliITSclusterTable.h"
0ac80088 38#include "AliITSRecPointU.h"
0b255a22 39#include "AliITStrackU.h"
1d9af2d5 40#include "AliITStrackerMI.h"
41#include "AliITSlayerUpgrade.h"
42#include "AliITSsegmentationUpgrade.h"
43#include "AliITStrackerUpgrade.h"
44#include "AliITSReconstructor.h"
45#include "AliLog.h"
46#include "AliRun.h"
47
48ClassImp(AliITStrackerUpgrade)
49
50//____________________________________________________________________________
556b741c 51 AliITStrackerUpgrade::AliITStrackerUpgrade():
52 AliITStrackerMI(),
53 fNLayers(), fPhiEstimate(0), fITSStandAlone(0), fLambdac(0),
54 fPhic(0), fCoef1(0), fCoef2(0), fCoef3(0), fNloop(0),
55 fPhiWin(0), fLambdaWin(0), fVert(0), fVertexer(0),
56 fListOfTracks(0), fListOfUTracks(0), fITSclusters(0),
57 fInwardFlag(0), fOuterStartLayer(0), fInnerStartLayer(0),
58 fMinNPoints(0), fMinQ(0), fTrackToFollow(), fLayers(0), fSegmentation(0x0),
59 fCluLayer(0), fCluCoord(0)
4211bbc5 60{
61 // Default constructor
62 Init();
665c0bc7 63
4211bbc5 64}
65//____________________________________________________________________________
556b741c 66AliITStrackerUpgrade::AliITStrackerUpgrade(Int_t nLay):
67 AliITStrackerMI(),
68 fNLayers(nLay), fPhiEstimate(0), fITSStandAlone(0), fLambdac(0),
69 fPhic(0), fCoef1(0), fCoef2(0), fCoef3(0), fNloop(0),
70 fPhiWin(0), fLambdaWin(0), fVert(0), fVertexer(0),
71 fListOfTracks(0), fListOfUTracks(0), fITSclusters(0),
72 fInwardFlag(0), fOuterStartLayer(0), fInnerStartLayer(nLay),
73 fMinNPoints(0), fMinQ(0), fTrackToFollow(), fLayers(0), fSegmentation(0x0),
74 fCluLayer(0), fCluCoord(0)
4211bbc5 75{
76 //
77 // constructor
78 //
79 Init();
1d9af2d5 80
4211bbc5 81}
665c0bc7 82
1d9af2d5 83//________________________________________________________________________
556b741c 84AliITStrackerUpgrade::AliITStrackerUpgrade(const AliITStrackerUpgrade& tracker):
85 AliITStrackerMI(),
86 fNLayers(tracker.fNLayers), fPhiEstimate(tracker.fPhiEstimate),
87 fITSStandAlone(tracker.fITSStandAlone), fLambdac(tracker.fLambdac),
88 fPhic(tracker.fPhic), fCoef1(tracker.fCoef1), fCoef2(tracker.fCoef2),
89 fCoef3(tracker.fCoef3), fNloop(tracker.fNloop), fPhiWin(tracker.fPhiWin),
90 fLambdaWin(tracker.fLambdaWin), fVert(tracker.fVert), fVertexer(tracker.fVertexer),
91 fListOfTracks(tracker.fListOfTracks), fListOfUTracks(tracker.fListOfUTracks),
92 fITSclusters(tracker.fITSclusters), fInwardFlag(tracker.fInwardFlag),
93 fOuterStartLayer(tracker.fOuterStartLayer), fInnerStartLayer(tracker.fInnerStartLayer),
94 fMinNPoints(tracker.fMinNPoints), fMinQ(tracker.fMinQ), fTrackToFollow(tracker.fTrackToFollow), fLayers(tracker.fLayers),
95 fSegmentation(tracker.fSegmentation), fCluLayer(tracker.fCluLayer), fCluCoord(tracker.fCluCoord)
4211bbc5 96{
97 //
98 // Copy constructor
99 for(Int_t i=0;i<2;i++){
100 fPoint1[i]=tracker.fPoint1[i];
101 fPoint2[i]=tracker.fPoint2[i];
102 fPoint3[i]=tracker.fPoint3[i];
103 fPointc[i]=tracker.fPointc[i];
104 }
105 if(tracker.fVertexer && tracker.fVert){
106 fVert = new AliESDVertex(*tracker.fVert);
107 }
108 else {
109 fVert = tracker.fVert;
110 }
111 for(Int_t i=0;i<fNLayers;i++){
112 fCluLayer[i] = tracker.fCluLayer[i];
113 fCluCoord[i] = tracker.fCluCoord[i];
114 }
1d9af2d5 115}
116//______________________________________________________________________
117AliITStrackerUpgrade& AliITStrackerUpgrade::operator=(const AliITStrackerUpgrade& source){
118 // Assignment operator.
119 this->~AliITStrackerUpgrade();
120 new(this) AliITStrackerUpgrade(source);
121 return *this;
122
123}
124
125//____________________________________________________________________________
126AliITStrackerUpgrade::~AliITStrackerUpgrade(){
127 // destructor
128 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
129 // and is deleted here
130 if(fVertexer){
131 if(fVert)delete fVert;
132 }
133 fVert = 0;
134 fVertexer = 0;
135
136 if(fPhiWin)delete []fPhiWin;
137 if(fLambdaWin)delete []fLambdaWin;
138 fListOfTracks->Delete();
139 delete fListOfTracks;
0b255a22 140 fListOfUTracks->Delete();
141 delete fListOfUTracks;
1d9af2d5 142 if(fCluLayer){
665c0bc7 143 for(Int_t i=0;i<fNLayers;i++){
1d9af2d5 144 if(fCluLayer[i]){
145 fCluLayer[i]->Delete();
146 delete fCluLayer[i];
147 }
148 }
149 delete [] fCluLayer;
150 }
151 if(fCluCoord){
665c0bc7 152 for(Int_t i=0;i<fNLayers;i++){
1d9af2d5 153 if(fCluCoord[i]){
154 fCluCoord[i]->Delete();
155 delete fCluCoord[i];
156 }
157 }
158 delete [] fCluCoord;
159 }
160
f059e2be 161 if(fSegmentation) delete fSegmentation;
1d9af2d5 162}
163
164//____________________________________________________________________________
165Int_t AliITStrackerUpgrade::Clusters2Tracks(AliESDEvent *event){
166 // This method is used to find and fit the tracks. By default the corresponding
167 // method in the parent class is invoked. In this way a combined tracking
168 // TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
169 // is done in the ITS only. In the standard reconstruction chain this option
170 // can be set via AliReconstruction::SetOption("ITS","onlyITS")
171 Int_t rc=0;
172 if(!fITSStandAlone){
173 rc=AliITStrackerMI::Clusters2Tracks(event);
174 }
175 else {
176 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
177 }
178 if(!rc){
179 rc=FindTracks(event,kFALSE);
180 if(AliITSReconstructor::GetRecoParam()->GetSAUseAllClusters()==kTRUE) {
181 rc=FindTracks(event,kTRUE);
182 }
183 }
184 return rc;
185}
186//_________________________________________________-
187void AliITStrackerUpgrade::Init(){
188 // Reset all data members
665c0bc7 189 const Int_t nL = fNLayers;
1d9af2d5 190 fPhiEstimate=0;
191 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
192 fLambdac=0;
193 fPhic=0;
194 fCoef1=0;
195 fCoef2=0;
196 fCoef3=0;
197 fPointc[0]=0;
198 fPointc[1]=0;
199 fVert = 0;
200 fVertexer = 0;
201 Int_t nLoops=AliITSReconstructor::GetRecoParam()->GetNLoopsSA();
202 if(nLoops==33){
203 SetFixedWindowSizes();
204 }else{
205 Double_t phimin=AliITSReconstructor::GetRecoParam()->GetMinPhiSA();
206 Double_t phimax=AliITSReconstructor::GetRecoParam()->GetMaxPhiSA();
207 Double_t lambmin=AliITSReconstructor::GetRecoParam()->GetMinLambdaSA();
208 Double_t lambmax=AliITSReconstructor::GetRecoParam()->GetMaxLambdaSA();
209 SetCalculatedWindowSizes(nLoops,phimin,phimax,lambmin,lambmax);
210 }
211 fMinQ=AliITSReconstructor::GetRecoParam()->GetSAMinClusterCharge();
212 fITSclusters = 0;
213 SetOuterStartLayer(1);
214 SetSAFlag(kFALSE);
4211bbc5 215 fListOfTracks=new TClonesArray("AliITStrackU",100);
0b255a22 216 fListOfUTracks=new TClonesArray("AliITStrackU",100);
665c0bc7 217 fLayers=new AliITSlayerUpgrade*[nL];//to be fixed
1d9af2d5 218 fCluLayer = 0;
219 fCluCoord = 0;
220 fMinNPoints = 3;
665c0bc7 221 for(Int_t layer=0; layer<fNLayers; layer++){
1d9af2d5 222 Double_t p=0.;
223 Double_t zC= 0.;
224 fLayers[layer] = new AliITSlayerUpgrade(p,zC);
225 }
226
db688ae2 227 fSegmentation = new AliITSsegmentationUpgrade();
1d9af2d5 228
229}
230//_______________________________________________________________________
231Int_t AliITStrackerUpgrade::LoadClusters(TTree *clusTree){
f059e2be 232 //
233 // Load clusters for tracking
234 //
8d499867 235
0ac80088 236 TClonesArray statITSCluster("AliITSRecPointU");
8d499867 237 TClonesArray *ITSCluster = &statITSCluster;
238
f059e2be 239 TBranch* itsClusterBranch=clusTree->GetBranch("ITSRecPoints");
240 if (!itsClusterBranch){
241 AliError("can't get the branch with the ITS clusters ! \n");
242 return 1;
243 }
244 itsClusterBranch->SetAddress(&ITSCluster);
245 clusTree->GetEvent(0);
246 Int_t nCluster = ITSCluster->GetEntriesFast();
247 for(Int_t i=0; i<nCluster; i++){
0ac80088 248 AliITSRecPointU *recp = (AliITSRecPointU*)ITSCluster->UncheckedAt(i);
249 fLayers[recp->GetLayer()]->InsertCluster(new AliITSRecPointU(*recp));
f059e2be 250 }//loop clusters
8d499867 251
1d9af2d5 252 SetClusterTree(clusTree);
253 return 0;
254}
255
256//_______________________________________________________
257void AliITStrackerUpgrade::ResetForFinding(){
258 // Reset data members used in all loops during track finding
259 fPhiEstimate=0;
260 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
261 fLambdac=0;
262 fPhic=0;
263 fCoef1=0;
264 fCoef2=0;
265 fCoef3=0;
266 fPointc[0]=0;
267 fPointc[1]=0;
268 fListOfTracks->Clear();
0b255a22 269 fListOfUTracks->Clear();
1d9af2d5 270}
271
1d9af2d5 272//______________________________________________________________________
273Int_t AliITStrackerUpgrade::FindTracks(AliESDEvent* event,Bool_t useAllClusters){
274
275 // Track finder using the ESD object
276 AliDebug(2,Form(" field is %f",event->GetMagneticField()));
1d9af2d5 277 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
278 if(!fITSclusters){
279 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
280 return -1;
281 }
282
283 //Reads event and mark clusters of traks already found, with flag kITSin
284 Int_t nentr=event->GetNumberOfTracks();
285 if(!useAllClusters) {
286 while (nentr--) {
287 AliESDtrack *track=event->GetTrack(nentr);
288 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
289 Int_t idx[12];
290 Int_t ncl = track->GetITSclusters(idx);
291 for(Int_t k=0;k<ncl;k++){
0ac80088 292 AliITSRecPointU* cll = (AliITSRecPointU*)GetCluster(idx[k]);
1d9af2d5 293 cll->SetBit(kSAflag);
294 }
295 }
296 }
297 }else{
298 while (nentr--) {
299 AliESDtrack *track=event->GetTrack(nentr);
300 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
301 Int_t idx[12];
302 Int_t ncl = track->GetITSclusters(idx);
303 for(Int_t k=0;k<ncl;k++){
0ac80088 304 AliITSRecPointU* cll = (AliITSRecPointU*)GetCluster(idx[k]);
1d9af2d5 305 cll->ResetBit(kSAflag);
306 }
307 }
308 }
309 }
310 //Get primary vertex
311 Double_t primaryVertex[3];
312 event->GetVertex()->GetXYZ(primaryVertex);
4211bbc5 313 Int_t nclusters[fNLayers];
665c0bc7 314 for(Int_t i=0; i<fNLayers; i++){
0b255a22 315 nclusters[i]=0;
316 }
317
4211bbc5 318 Int_t dmar[fNLayers];
665c0bc7 319 for(Int_t i=0; i<fNLayers; i++){
0b255a22 320 dmar[i]=0;
321 }
322
1d9af2d5 323 if (fCluLayer == 0) {
665c0bc7 324 fCluLayer = new TClonesArray*[fNLayers];
325 fCluCoord = new TClonesArray*[fNLayers];
326 for(Int_t i=0;i<fNLayers;i++) {
1d9af2d5 327 fCluLayer[i]=0;
328 fCluCoord[i]=0;
329 }
330 }
665c0bc7 331 for(Int_t i=0;i<fNLayers;i++){
1d9af2d5 332 if (!ForceSkippingOfLayer(i)) {
333 for(Int_t cli=0;cli<fLayers[i]->GetNumberOfClusters();cli++){
0ac80088 334 AliITSRecPointU* cls = (AliITSRecPointU*)fLayers[i]->GetCluster(cli);
1d9af2d5 335 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
336 if(cls->GetQ()==0) continue; //fake clusters dead zones
337 if(i>1 && cls->GetQ()<=fMinQ) continue; // cut on SDD and SSD cluster charge
338 nclusters[i]++;
339 }
340 }
341 dmar[i]=0;
342 if(!fCluLayer[i]){
0ac80088 343 fCluLayer[i] = new TClonesArray("AliITSRecPointU",nclusters[i]);
1d9af2d5 344 }else{
345 fCluLayer[i]->Delete();
346 fCluLayer[i]->Expand(nclusters[i]);
347 }
348 if(!fCluCoord[i]){
349 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
350 }else{
351 fCluCoord[i]->Delete();
352 fCluCoord[i]->Expand(nclusters[i]);
353 }
354 }
665c0bc7 355 for(Int_t ilay=0;ilay<fNLayers;ilay++){
1d9af2d5 356 TClonesArray &clulay = *fCluLayer[ilay];
357 TClonesArray &clucoo = *fCluCoord[ilay];
358 if (!ForceSkippingOfLayer(ilay)){
f059e2be 359 AliDebug(2,Form("number of clusters in layer %i : %i",ilay,fLayers[ilay]->GetNumberOfClusters()));
1d9af2d5 360 for(Int_t cli=0;cli<fLayers[ilay]->GetNumberOfClusters();cli++){
0ac80088 361 AliITSRecPointU* cls = (AliITSRecPointU*)fLayers[ilay]->GetCluster(cli);
1d9af2d5 362 if(cls->TestBit(kSAflag)==kTRUE) continue;
363 if(cls->GetQ()==0) continue;
364 Double_t phi=0;Double_t lambda=0;
365 Double_t x=0;Double_t y=0;Double_t z=0;
366 Float_t sx=0;Float_t sy=0;Float_t sz=0;
367 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
368 GetCoorErrors(cls,sx,sy,sz);
369 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
370 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
371 dmar[ilay]++;
372 }
db688ae2 373 } else AliDebug(2,Form("Force skipping layer %i",ilay));
1d9af2d5 374 }
375
376
377 // track counter
378 Int_t ntrack=0;
379
4211bbc5 380 static Int_t nClusLay[fgMaxNLayer];//counter for clusters on each layer
1d9af2d5 381 Int_t startLayForSeed=0;
382 Int_t lastLayForSeed=fOuterStartLayer;
383 Int_t nSeedSteps=lastLayForSeed-startLayForSeed;
384 Int_t seedStep=1;
385 if(fInwardFlag){
665c0bc7 386 startLayForSeed=fNLayers-1;
1d9af2d5 387 lastLayForSeed=fInnerStartLayer;
388 nSeedSteps=startLayForSeed-lastLayForSeed;
389 seedStep=-1;
390 }
391 // loop on minimum number of points
665c0bc7 392 for(Int_t iMinNPoints=fNLayers; iMinNPoints>=fMinNPoints; iMinNPoints--) {
1d9af2d5 393 // loop on starting layer for track finding
394 for(Int_t iSeedLay=0; iSeedLay<=nSeedSteps; iSeedLay++) {
395 Int_t theLay=startLayForSeed+iSeedLay*seedStep;
396 if(ForceSkippingOfLayer(theLay)) continue;
397 Int_t minNPoints=iMinNPoints-theLay;
665c0bc7 398 if(fInwardFlag) minNPoints=iMinNPoints-(fNLayers-1-theLay);
399 for(Int_t i=theLay+1;i<fNLayers;i++)
1d9af2d5 400 if(ForceSkippingOfLayer(i))
401 minNPoints--;
402 if(minNPoints<fMinNPoints) continue;
403
404 // loop on phi and lambda window size
405 for(Int_t nloop=0;nloop<fNloop;nloop++){
406 Int_t nclTheLay=fCluLayer[theLay]->GetEntries();
407 while(nclTheLay--){
408 ResetForFinding();
409 Bool_t useRP=SetFirstPoint(theLay,nclTheLay,primaryVertex);
410 if(!useRP) continue;
665c0bc7 411 AliITStrackU trs(fNLayers);
1d9af2d5 412
413 Int_t pflag=0;
414 Int_t kk;
665c0bc7 415 for(kk=0;kk<fNLayers;kk++) nClusLay[kk] = 0;
1d9af2d5 416 kk=0;
417 nClusLay[kk] = SearchClusters(theLay,fPhiWin[nloop],fLambdaWin[nloop],
418 &trs,primaryVertex[2],pflag);
419 Int_t nextLay=theLay+seedStep;
420 Bool_t goon=kTRUE;
421 while(goon){
422
423 kk++;
424 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
425 &trs,primaryVertex[2],pflag);
426 if(nClusLay[kk]!=0){
427
428 pflag=1;
429 if(kk==1) {
430 fPoint3[0]=fPointc[0];
431 fPoint3[1]=fPointc[1];
432 } else {
433 UpdatePoints();
434 }
435 }
436 nextLay+=seedStep;
665c0bc7 437 if(nextLay<0 || nextLay==fNLayers) goon=kFALSE;
1d9af2d5 438 }
439
440
441 Int_t layOK=0;
442 if(!fInwardFlag){
665c0bc7 443 for(Int_t nnp=0;nnp<fNLayers-theLay;nnp++){
1d9af2d5 444 if(nClusLay[nnp]!=0) layOK+=1;
445 }
446 }else{
447 for(Int_t nnp=theLay; nnp>=0; nnp--){
448 if(nClusLay[nnp]!=0) layOK+=1;
449 }
450 }
451 if(layOK>=minNPoints){
452 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]));
453 AliITStrackV2* tr2 = 0;
454 Bool_t onePoint = kFALSE;
4211bbc5 455 tr2 = FitTrack(&trs,primaryVertex,onePoint);
456 if(!tr2){
457 continue;
458 }
459 AliDebug(2,Form("---NPOINTS fit: %d\n",tr2->GetNumberOfClusters()));
1d9af2d5 460
4211bbc5 461 StoreTrack(tr2,event,useAllClusters);
462 ntrack++;
463
464 }
1d9af2d5 465
466 }//end loop on clusters of theLay
467 } //end loop on window sizes
468 } //end loop on theLay
469 }//end loop on min points
470 if(!useAllClusters) AliInfo(Form("Number of found tracks: %d",event->GetNumberOfTracks()));
471
472 ResetForFinding();
473 return 0;
474
475}
476
477//________________________________________________________________________
478
0b255a22 479AliITStrackV2* AliITStrackerUpgrade::FitTrack(AliITStrackU* tr,Double_t *primaryVertex,Bool_t onePoint) {
1d9af2d5 480
0b255a22 481 const Int_t kMaxClu=AliITStrackU::kMaxNumberOfClusters;
1d9af2d5 482
483
4211bbc5 484 static Int_t clind[fgMaxNLayer][kMaxClu];
485 static Int_t clmark[fgMaxNLayer][kMaxClu];
486 static Int_t end[fgMaxNLayer];
0ac80088 487 static AliITSRecPointU *listlayer[fgMaxNLayer][kMaxClu];
556b741c 488 static Int_t indices[fgMaxNLayer];
489
4211bbc5 490 for(Int_t k=0;k<fgMaxNLayer; k++)end[k]=0;
1d9af2d5 491
665c0bc7 492 for(Int_t i=0;i<fNLayers;i++) {
1d9af2d5 493 for(Int_t j=0;j<kMaxClu; j++){
494 clind[i][j]=0;
495 clmark[i][j]=0;
496 listlayer[i][j]=0;
497 }
498 }
665c0bc7 499 Int_t inx[fNLayers];
500 for (Int_t k=0; k<fNLayers; k++) inx[k]=-1;
0b255a22 501 Int_t nclusters = tr->GetNumberOfClustersU();
1d9af2d5 502 for(Int_t ncl=0;ncl<nclusters;ncl++){
0b255a22 503 Int_t index = tr->GetClusterIndexU(ncl);
1d9af2d5 504 Int_t lay = (index & 0xf0000000) >> 28;
7dc6449a 505 //Int_t cli = index&0x0fffffff;
9e396337 506 //AliITSRecPoint* cl = (AliITSRecPoint*)fLayers[lay]->GetCluster(cli);
0ac80088 507 AliITSRecPointU* cl = (AliITSRecPointU*)GetCluster(index);
1d9af2d5 508 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
509 inx[lay]=index;
510
511 Int_t nInLay=end[lay];
512 listlayer[lay][nInLay]=cl;
513 clind[lay][nInLay]=index;
514 end[lay]++;
515 }
516
665c0bc7 517 for(Int_t nlay=0;nlay<fNLayers;nlay++){
1d9af2d5 518 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
519 Int_t mark = tr->GetClusterMark(nlay,ncl);
520 clmark[nlay][ncl]=mark;
521 }
522 }
523
524
525 Int_t firstLay=-1,secondLay=-1;
665c0bc7 526 for(Int_t i=0;i<fNLayers;i++) {
1d9af2d5 527 if(end[i]==0) {
528 end[i]=1;
529 }else{
530 if(firstLay==-1) {
531 firstLay=i;
532 } else if(secondLay==-1) {
533 secondLay=i;
534 }
535 }
536 }
537
4211bbc5 538 //---adding initialization for non existent layers
539 for(Int_t i=fNLayers;i<fgMaxNLayer;i++) {
540 if(end[i]==0) {
541 end[i]=1;
542 }
543 }
544
545
546
1d9af2d5 547 if(firstLay==-1 || (secondLay==-1 && !onePoint)) return 0;
4211bbc5 548
0b255a22 549 TClonesArray &arrSA= *fListOfUTracks;
1d9af2d5 550 Int_t nFoundTracks=0;
551
4211bbc5 552
1d9af2d5 553 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
556b741c 554 indices[0]=l0;
1d9af2d5 555 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
556b741c 556 indices[1]=l1;
1d9af2d5 557 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
556b741c 558 indices[2]=l2;
1d9af2d5 559 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
556b741c 560 indices[3]=l3;
1d9af2d5 561 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
556b741c 562 indices[4]=l4;
1d9af2d5 563 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
556b741c 564 indices[5]=l5;
4211bbc5 565 for(Int_t l6=0;l6<end[6];l6++){//loop on layer 7
556b741c 566 indices[6]=l6;
4211bbc5 567 for(Int_t l7=0;l7<end[7];l7++){ //loop on layer 8
556b741c 568 indices[7]=l7;
569
570 Int_t iFirstLay=indices[firstLay];
571 Int_t mrk1=clmark[firstLay][iFirstLay];
572
4211bbc5 573 Double_t x1,y1,z1,sx1,sy1,sz1;
574 Double_t x2,y2,z2,sx2,sy2,sz2;
556b741c 575 AliITSRecPointU* p1=(AliITSRecPointU*)listlayer[firstLay][iFirstLay];
4211bbc5 576 Int_t layer = 0;
577 Double_t radius = 0.;
578 Double_t yclu1 = p1->GetY();
579 Double_t zclu1 = p1->GetZ();
580 layer=p1->GetLayer();
581 radius = fSegmentation->GetRadius(layer);
582 Double_t cv=0.,tgl2=0.,phi2=0.;
556b741c 583 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,mrk1);
4211bbc5 584 x1 = arr1->GetX();
585 y1 = arr1->GetY();
586 z1 = arr1->GetZ();
587 sx1 = arr1->GetSx();
588 sy1 = arr1->GetSy();
589 sz1 = arr1->GetSz();
590
591 if(secondLay>0) {
556b741c 592 Int_t iSecondLay=indices[secondLay];
593 Int_t mrk2=clmark[secondLay][iSecondLay];
594 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,mrk2);
4211bbc5 595 x2 = arr2->GetX();
596 y2 = arr2->GetY();
597 z2 = arr2->GetZ();
598 sx2 = arr2->GetSx();
599 sy2 = arr2->GetSy();
600 sz2 = arr2->GetSz();
601 cv = Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
602 tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
603 phi2 = TMath::ATan2((y2-y1),(x2-x1));
604 }
556b741c 605
4211bbc5 606 Double_t x,y,z = 0.;
607 Double_t xz[2];
556b741c 608 xz[0]= p1->GetDetLocalX();
609 xz[1]= p1->GetDetLocalZ();
610 fSegmentation->DetToGlobal(layer,p1->GetModule(),xz[0], xz[1],x,y,z);
4211bbc5 611
612
0ac80088 613 Double_t phiclrad;
4211bbc5 614 phiclrad=TMath::ATan2(y,x);
615 if (phiclrad<0) phiclrad+=TMath::TwoPi();
616 else if (phiclrad>=TMath::TwoPi()) phiclrad-=TMath::TwoPi();
617
556b741c 618 Double_t alpha = fSegmentation->GetAlpha(fSegmentation->GetModule(phiclrad));
619
0ac80088 620
4211bbc5 621 AliITStrackU trac(alpha,radius,yclu1,zclu1,phi2,tgl2,cv,1,fNLayers);
556b741c 622
623 for(Int_t iLay=fgMaxNLayer-1; iLay>=0; iLay--){
624 Int_t iInLay=indices[iLay];
625 AliITSRecPointU* cl=(AliITSRecPointU*)listlayer[iLay][iInLay];
626 if(cl!=0){
627 trac.AddClusterV2(iLay,(clind[iLay][iInLay] & 0x0fffffff)>>0);
628 trac.AddClusterMark(iLay,clmark[iLay][iInLay]);
629 }
4211bbc5 630 }
556b741c 631
4211bbc5 632 //fit with Kalman filter using RefitAtBase()
633 AliITStrackU ot(trac, kFALSE);
634 ot.ResetCovariance(10.);
635 ot.ResetClusters();
1d9af2d5 636
4211bbc5 637 // Propagate inside the innermost layer with a cluster
638 if(ot.Propagate(ot.GetX()-0.1*ot.GetX())) {
639 if(RefitAtBase(AliITSRecoParam::GetrInsideITSscreen(),&ot,inx)){ //fit from layer 1 to layer 6
640 AliITStrackU otrack2(ot,kFALSE);
641 otrack2.ResetCovariance(10.);
642 otrack2.ResetClusters();
1d9af2d5 643
4211bbc5 644 //fit from last layer to layer 1
645 if(RefitAtBase(/*AliITSRecoParam::GetrInsideSPD1()*/fSegmentation->GetRadius(0)-0.3,&otrack2,inx)) {//check clind
646 new(arrSA[nFoundTracks]) AliITStrackU(otrack2);
647 ++nFoundTracks;
648 }
1d9af2d5 649
4211bbc5 650 }
651 }
652
4211bbc5 653 }//end loop layer 8
654 }//end loop layer 7
1d9af2d5 655 }//end loop layer 6
656 }//end loop layer 5
657 }//end loop layer 4
658 }//end loop layer 3
659 }//end loop layer 2
660 }//end loop layer 1
661
662
663
664
4211bbc5 665 if(fListOfUTracks->GetEntries()==0) return 0;
1d9af2d5 666
667 Int_t lowchi2 = FindTrackLowChiSquare();
4211bbc5 668 AliITStrackU* otrack = (AliITStrackU*)fListOfUTracks->At(lowchi2);
669
1d9af2d5 670 if(otrack==0) {
671 return 0;
672 }
0a64515a 673
674 CookLabel(otrack,0.); //MI change - to see fake ratio
675 Int_t label=FindLabel(otrack);
676 otrack->SetLabel(label);
677
665c0bc7 678 Int_t indexc[fNLayers];
679 for(Int_t i=0;i<fNLayers;i++) indexc[i]=0;
1d9af2d5 680 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
681 indexc[nind] = otrack->GetClusterIndex(nind);
682 }
1d9af2d5 683 //remove clusters of found track
665c0bc7 684 for(Int_t nlay=0;nlay<fNLayers;nlay++){
4211bbc5 685 for(Int_t cln=0;cln<otrack->GetNumberOfMarked(nlay);cln++){
686 Int_t index = otrack->GetClusterMark(nlay,cln);
1d9af2d5 687 fCluLayer[nlay]->RemoveAt(index);
688 RemoveClusterCoord(nlay,index);
689 fCluLayer[nlay]->Compress();
690 }
691 }
692 return otrack;
693
694}
695
696//_______________________________________________________
697void AliITStrackerUpgrade::StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) /*const*/
698{
699 //
700 // Add new track to the ESD
701 //
702 AliESDtrack outtrack;
703 outtrack.UpdateTrackParams(t,AliESDtrack::kITSin);
704 if(pureSA) outtrack.SetStatus(AliESDtrack::kITSpureSA);
705 outtrack.SetStatus(AliESDtrack::kITSout);
706 outtrack.SetStatus(AliESDtrack::kITSrefit);
707 Double_t sdedx[4]={0.,0.,0.,0.};
708 for(Int_t i=0; i<4; i++) sdedx[i]=t->GetSampledEdx(i);
709 outtrack.SetITSdEdxSamples(sdedx);
710 event->AddTrack(&outtrack);
711 return;
712}
713
714
715//_______________________________________________________
0b255a22 716Int_t AliITStrackerUpgrade::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackU* trs,Double_t /*zvertex*/,Int_t pflag){
1d9af2d5 717 //function used to to find the clusters associated to the track
718
8d499867 719 AliDebug(2,"Starting...");
720 if(ForceSkippingOfLayer(layer)) {
f059e2be 721 AliDebug(2,Form("Forcing skipping of layer %i. Exiting",layer));
722 return 0;
8d499867 723 }
1d9af2d5 724
725 Int_t nc=0;
db688ae2 726 Double_t r=fSegmentation->GetRadius(layer);
1d9af2d5 727 if(pflag==1){
728 Float_t cx1,cx2,cy1,cy2;
729 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
730 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
731 return 0;
732 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
733 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
734 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
735 }
736
737
738 Int_t ncl = fCluLayer[layer]->GetEntries();
8d499867 739 AliDebug(2,Form(" Number of clusters %i in layer %i.",ncl,layer));
1d9af2d5 740 for (Int_t index=0; index<ncl; index++) {
0ac80088 741 AliITSRecPointU *c = (AliITSRecPointU*)fCluLayer[layer]->At(index);
1d9af2d5 742 if (!c) continue;
743 if (c->GetQ()<=0) continue;
744 if(layer>1 && c->GetQ()<=fMinQ) continue;
745
746 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
747
748 Double_t phi;
749 Double_t xT,yT;
750 xT=arr->GetX();
751 yT=arr->GetY();
752 phi=arr->GetPhi();
753 if (TMath::Abs(phi-fPhiEstimate)>phiwindow)
754 {
755 continue;
756 }
757
758 Double_t lambda = arr->GetLambda();
759 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
760
0b255a22 761 if(trs->GetNumberOfClustersU()==trs->GetMaxNumberOfClusters()) return 0;
1d9af2d5 762 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
763 Int_t orind = arr->GetOrInd();
0b255a22 764 trs->AddClusterU(layer,orind);
1d9af2d5 765 trs->AddClusterMark(layer,index);
766
767 nc++;
768 fLambdac=lambda;
769 fPhiEstimate=phi;
770
771 fPointc[0]=arr->GetX();
772 fPointc[1]=arr->GetY();
773 }
774 return nc;
775}
776
777//________________________________________________________________
778Bool_t AliITStrackerUpgrade::SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex){
779 // Sets the first point (seed) for tracking
780
0ac80088 781 AliITSRecPointU* cl = (AliITSRecPointU*)fCluLayer[lay]->At(clu);
1d9af2d5 782 if(!cl) return kFALSE;
783 if (cl->GetQ()<=0) return kFALSE;
784 if(lay>1 && cl->GetQ()<=fMinQ) return kFALSE;
785 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(lay,clu);
786 fPhic = arr->GetPhi();
787 fLambdac = arr->GetLambda();
788 fPhiEstimate = fPhic;
789 fPoint1[0]=primaryVertex[0];
790 fPoint1[1]=primaryVertex[1];
791 fPoint2[0]=arr->GetX();
792 fPoint2[1]=arr->GetY();
793 return kTRUE;
794}
795
796//________________________________________________________________
797void AliITStrackerUpgrade::UpdatePoints(){
798 //update of points for the estimation of the curvature
799
800 fPoint2[0]=fPoint3[0];
801 fPoint2[1]=fPoint3[1];
802 fPoint3[0]=fPointc[0];
803 fPoint3[1]=fPointc[1];
1d9af2d5 804}
1d9af2d5 805//___________________________________________________________________
806Int_t AliITStrackerUpgrade::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){
807
808 //given (x,y) of three recpoints (in global coordinates)
809 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
810
811 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
812 if(den==0) return 0;
813 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
814 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
815 c = -x1*x1-y1*y1-a*x1-b*y1;
816 return 1;
817}
818//__________________________________________________________________________
819Int_t AliITStrackerUpgrade::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){
820
821 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
822 //c2 is -rlayer*rlayer
823
824 if(a1==0) return 0;
825 Double_t m = c2-c1;
826 Double_t aA = (b1*b1)/(a1*a1)+1;
827 Double_t bB = (-2*m*b1/(a1*a1));
828 Double_t cC = c2+(m*m)/(a1*a1);
829 Double_t dD = bB*bB-4*aA*cC;
830 if(dD<0) return 0;
831
832 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
833 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
834 x1 = (c2-c1-b1*y1)/a1;
835 x2 = (c2-c1-b1*y2)/a1;
836
837 return 1;
838}
839//____________________________________________________________________
840Double_t AliITStrackerUpgrade::Curvature(Double_t x1,Double_t y1,Double_t
841 x2,Double_t y2,Double_t x3,Double_t y3){
842
843 //calculates the curvature of track
844 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
845 if(den==0) return 0;
846 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
847 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
848 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
849 Double_t xc=-a/2.;
850
851 if((a*a+b*b-4*c)<0) return 0;
852 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
853 if(rad==0) return 0;
854
855 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
856 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
857 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
858 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
859
860 return 1/rad;
861
862}
1d9af2d5 863//____________________________________________________________________
864Double_t AliITStrackerUpgrade::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
865
866 //Returns the point closest to pp
867
868 Double_t diff1 = p1-pp;
869 Double_t diff2 = p2-pp;
870
871 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
872 else fPhiEstimate=p2;
873 return fPhiEstimate;
874
875}
1d9af2d5 876//_________________________________________________________________
877Int_t AliITStrackerUpgrade::FindTrackLowChiSquare() const {
878 // returns track with lowest chi square
4211bbc5 879 Int_t dim=fListOfUTracks->GetEntries();
1d9af2d5 880 if(dim<=1) return 0;
4211bbc5 881 AliITStrackV2* trk = (AliITStrackV2*)fListOfUTracks->At(0);
1d9af2d5 882 Double_t minChi2=trk->GetChi2();
883 Int_t index=0;
884 for(Int_t i=1;i<dim;i++){
4211bbc5 885 trk = (AliITStrackV2*)fListOfUTracks->At(i);
1d9af2d5 886 Double_t chi2=trk->GetChi2();
887 if(chi2<minChi2){
888 minChi2=chi2;
889 index=i;
890 }
891 }
892 return index;
893}
894
895//__________________________________________________________
0a64515a 896Int_t AliITStrackerUpgrade::FindLabel(AliITStrackV2* track) const {
897 //
1d9af2d5 898
665c0bc7 899 Int_t labl[fNLayers][3];
900 Int_t cnts[fNLayers][3];
901 for(Int_t j=0;j<fNLayers;j++){
0a64515a 902 for(Int_t k=0;k<3;k++){
903 labl[j][k]=-2;
904 cnts[j][k]=1;
905 }
906 }
907 Int_t iNotLabel=0;
908 for(Int_t i=0;i<track->GetNumberOfClusters(); i++) {
909 Int_t indexc = track->GetClusterIndex(i);
0ac80088 910 AliITSRecPointU* cl = (AliITSRecPointU*)GetCluster(indexc);
0a64515a 911 AliDebug(2,Form(" cluster index %i ",indexc));
912 Int_t iLayer=cl->GetLayer();
913 for(Int_t k=0;k<3;k++){
914 labl[iLayer][k]=cl->GetLabel(k);
915 if(labl[iLayer][k]<0) iNotLabel++;
916 }
917 }
918 if(iNotLabel==3*track->GetNumberOfClusters()) return -2;
919
665c0bc7 920 for(Int_t j1=0;j1<fNLayers; j1++) {
0a64515a 921 for(Int_t j2=0; j2<j1; j2++){
922 for(Int_t k1=0; k1<3; k1++){
923 for(Int_t k2=0; k2<3; k2++){
924 if(labl[j1][k1]>=0 && labl[j1][k1]==labl[j2][k2] && cnts[j2][k2]>0){
925 cnts[j2][k2]++;
926 cnts[j1][k1]=0;
927 }
928 }
929 }
930 }
931 }
1d9af2d5 932
0a64515a 933
934 Int_t cntMax=0;
935 Int_t label=-1;
665c0bc7 936 for(Int_t j=0;j<fNLayers;j++){
0a64515a 937 for(Int_t k=0;k<3;k++){
938 if(cnts[j][k]>cntMax && labl[j][k]>=0){
939 cntMax=cnts[j][k];
940 label=labl[j][k];
941 }
942 }
943 }
944
945 Int_t lflag=0;
665c0bc7 946 for(Int_t i=0;i<fNLayers;i++)
f059e2be 947 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
0a64515a 948 if(lflag<track->GetNumberOfClusters()) label = -label;
949 return label;
1d9af2d5 950}
1d9af2d5 951//_____________________________________________________________________________
1d9af2d5 952void AliITStrackerUpgrade::SetCalculatedWindowSizes(Int_t n, Float_t phimin, Float_t phimax, Float_t lambdamin, Float_t lambdamax){
953 // Set sizes of the phi and lambda windows used for track finding
954 fNloop = n;
955 if(fPhiWin) delete [] fPhiWin;
956 if(fLambdaWin) delete [] fLambdaWin;
957 fPhiWin = new Double_t[fNloop];
958 fLambdaWin = new Double_t[fNloop];
959 Float_t stepPhi=(phimax-phimin)/(Float_t)(fNloop-1);
960 Float_t stepLambda=(lambdamax-lambdamin)/(Float_t)(fNloop-1);
961 for(Int_t k=0;k<fNloop;k++){
962 Float_t phi=phimin+k*stepPhi;
963 Float_t lam=lambdamin+k*stepLambda;
964 fPhiWin[k]=phi;
965 fLambdaWin[k]=lam;
966 }
967}
968//_____________________________________________________________________________
969void AliITStrackerUpgrade::SetFixedWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
970 // Set sizes of the phi and lambda windows used for track finding
971 fNloop = n;
972 if(phi){ // user defined values
973 fPhiWin = new Double_t[fNloop];
974 fLambdaWin = new Double_t[fNloop];
975 for(Int_t k=0;k<fNloop;k++){
976 fPhiWin[k]=phi[k];
977 fLambdaWin[k]=lam[k];
978 }
979 }
980 else { // default values
981
982 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
983 0.005,0.0053,0.0055,
984 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
985 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
986 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
987 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
988 0.005,0.005,0.006,
989 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
990 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
991 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
992
993 if(fNloop!=33){
994 fNloop = 33;
995 }
996
997
998 fPhiWin = new Double_t[fNloop];
999 fLambdaWin = new Double_t[fNloop];
1000
1001 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes();
1002
1003 for(Int_t k=0;k<fNloop;k++){
1004 fPhiWin[k]=phid[k]*factor;
1005 fLambdaWin[k]=lambdad[k]*factor;
1006 }
1007
1008 }
1009
1010}
1011//_______________________________________________________________________
0ac80088 1012void AliITStrackerUpgrade::GetCoorAngles(AliITSRecPointU* cl,Double_t &phi,Double_t &lambda, Double_t &x, Double_t &y,Double_t &z,Double_t* vertex){
1d9af2d5 1013 //Returns values of phi (azimuthal) and lambda angles for a given cluster
1d9af2d5 1014
1015 Double_t xz[2];
1016 xz[0]= cl->GetDetLocalX();
1017 xz[1]= cl->GetDetLocalZ() ;
1d9af2d5 1018 Int_t ilayer;
1019 ilayer = cl->GetLayer();
556b741c 1020 fSegmentation->DetToGlobal(ilayer,cl->GetModule(),xz[0], xz[1],x,y,z);
1d9af2d5 1021
1022 if(x!=0 && y!=0)
1023 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
1024 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1025}
1026
1027//________________________________________________________________________
0ac80088 1028void AliITStrackerUpgrade::GetCoorErrors(AliITSRecPointU* cl,Float_t &sx,Float_t &sy, Float_t &sz){
1d9af2d5 1029
1030 //returns sigmax, y, z of cluster in global coordinates
1031 /*
1032 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1033 Int_t lay,lad,det;
1034 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
1035
1036 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1037 Double_t phi=TMath::Pi()/2+alpha;
1038 if (lay==1) phi+=TMath::Pi();
1039
1040 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
1041 */
1042 Float_t covm[6];
1043 cl->GetGlobalCov(covm);
1044 sx=TMath::Sqrt(covm[0]);
1045 sy=TMath::Sqrt(covm[3]);
1046 sz=TMath::Sqrt(covm[5]);
1047
1048
1049
1050 // Float_t covm[6];
1051 // cl->GetGlobalCov(covm);
1052 // sx=12*1e-04;//TMath::Sqrt(covm[0]);
1053 // sy=12*1e-04;//TMath::Sqrt(covm[3]);
1054 // sz=40*1e-04;//TMath::Sqrt(covm[5]);
1055 /*
1056 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1057 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1058 sz = TMath::Sqrt(cl->GetSigmaZ2());
1059 */
1060}
1061//_____________________________________________________________
1062void AliITStrackerUpgrade::UnloadClusters() {
1063 //--------------------------------------------------------------------
1064 //This function unloads ITS clusters
1065 //--------------------------------------------------------------------
665c0bc7 1066 for (Int_t i=0; i<fNLayers; i++) fLayers[i]->ResetClusters();
1d9af2d5 1067}
1068//______________________________________________________________________
4211bbc5 1069Bool_t AliITStrackerUpgrade::RefitAtBase(Double_t xx,AliITStrackU *track,
1d9af2d5 1070 const Int_t *clusters)
1071{
1072 //--------------------------------------------------------------------
1073 // Simplified version for ITS upgrade studies -- does not use module info
1074 //--------------------------------------------------------------------
665c0bc7 1075 Int_t index[fNLayers];
1d9af2d5 1076 Int_t k;
665c0bc7 1077 for (k=0; k<fNLayers; k++) index[k]=-1;
1d9af2d5 1078 //
665c0bc7 1079 for (k=0; k<fNLayers; k++) {
1d9af2d5 1080 index[k]=clusters[k];
1081 }
1d9af2d5 1082
1083 ULong_t trStatus=0;
1084 if(track->GetESDtrack()) trStatus=track->GetStatus();
1085 Int_t innermostlayer=0;
1086 if(trStatus&AliESDtrack::kTPCin) {
665c0bc7 1087 innermostlayer=fNLayers-1;
1d9af2d5 1088 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
665c0bc7 1089 for(innermostlayer=0; innermostlayer<fNLayers; innermostlayer++) {
db688ae2 1090 if( (drphi < (fSegmentation->GetRadius(innermostlayer)+1.)) ||
1d9af2d5 1091 index[innermostlayer] >= 0 ) break;
1092 }
1093 AliDebug(2,Form(" drphi %f innermost %d",drphi,innermostlayer));
1094 }
1095
1096 Int_t from, to, step;
1097 if (xx > track->GetX()) {
665c0bc7 1098 from=innermostlayer; to=fNLayers;
1d9af2d5 1099 step=+1;
1100 } else {
665c0bc7 1101 from=fNLayers-1; to=innermostlayer-1;
1d9af2d5 1102 step=-1;
1103 }
1104 TString dir = (step>0 ? "outward" : "inward");
1105
1106 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
1107 Double_t r=0.;
db688ae2 1108 r=fSegmentation->GetRadius(ilayer);
1d9af2d5 1109
1110 if (step<0 && xx>r){
1111 break;
1112 }
1113
1d9af2d5 1114
1115 Double_t oldGlobXYZ[3];
1116
1117 if (!track->GetXYZ(oldGlobXYZ)) {
1118 return kFALSE;
1119 }
1120 // continue if we are already beyond this layer
1121 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1122 if(step>0 && oldGlobR > r){
1123 continue; // going outward
1124 }
1125 if(step<0 && oldGlobR < r) {
1126 continue; // going inward
1127 }
1128 Double_t phi,z;
1129 if (!track->GetPhiZat(r,phi,z)){
1130 return kFALSE;
556b741c 1131 } // only for ITS-SA tracks refit
1d9af2d5 1132 track->SetCheckInvariant(kFALSE);
1133
1134 if (phi<0) phi+=TMath::TwoPi();//from 0 to 360 (rad)
1135 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();//
0ac80088 1136
1137 Double_t alpha = fSegmentation->GetAlpha(fSegmentation->GetModule(phi));
1d9af2d5 1138 if (!track->Propagate(alpha,r)) {
1d9af2d5 1139 return kFALSE;
1140 }
1141
0ac80088 1142 const AliITSRecPointU *clAcc=0;
1d9af2d5 1143 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
1144
1145 Int_t idx=index[ilayer];
1146 if (idx>=0) { // cluster in this layer
1147 Int_t cli = idx&0x0fffffff;
0ac80088 1148 const AliITSRecPointU *cl=(AliITSRecPointU *)fLayers[ilayer]->GetCluster(cli);
1d9af2d5 1149
1150 if (cl) {
1151 Int_t cllayer = (idx & 0xf0000000) >> 28;;
1152 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
1153 if (chi2<maxchi2) {
1154 clAcc=cl;
1155 maxchi2=chi2;
1156 } else {
f059e2be 1157 return kFALSE;
1d9af2d5 1158 }
1159 }
1160 }
1161
1162 if (clAcc) {
1163 if (!UpdateMI(track,clAcc,maxchi2,idx)){
1164 return kFALSE;
1165 }
1166 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
1167 }
1168
1169
1170 // Correct for material of the current layer
1171 // cross material
1172 // add time if going outward
1173 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)){
1174 return kFALSE;
1175 }
1176 track->SetCheckInvariant(kFALSE);
1177 } // end loop on layers
1178
1179 if (!track->PropagateTo(xx,0.,0.)){
1180 return kFALSE;
8d499867 1181 }
556b741c 1182
1d9af2d5 1183 return kTRUE;
1184}
1185
1186//_____________________________________________________________________
0ac80088 1187Int_t AliITStrackerUpgrade::UpdateMI(AliITStrackU* track, const AliITSRecPointU* cl,Double_t chi2,Int_t index) const
1d9af2d5 1188{
1189 //
1190 // Update ITS track
1191 //
1192 Int_t layer = (index & 0xf0000000) >> 28;
1193 track->SetClIndex(layer, index);
1194 if (TMath::Abs(cl->GetQ())<1.e-13) return 0; // ingore the "virtual" clusters
1195
1196
1197 // Take into account the mis-alignment (bring track to cluster plane)
1198 Double_t xTrOrig=track->GetX();
1199 Double_t trxyz[3]; track->GetXYZ(trxyz);
1200 Float_t xclu1 = cl->GetX();//upgrade clusters tracking coordinate
1201 //Float_t yclu1 = cl->GetY();
1202 //Float_t zclu1 = cl->GetZ();
1203 if (!track->Propagate(xTrOrig+xclu1)){
1204 return 0;
1205 }
1206 AliCluster c(*cl);
1207 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
1208 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
1209 c.SetSigmaYZ(track->GetSigmaYZ(layer));
1210
1211 // Bring the track back to detector plane in ideal geometry
1212 Int_t updated = track->UpdateMI(&c,chi2,index);
1213 if (!track->Propagate(xTrOrig)) {
1214 return 0;
1215 }
1216 if(!updated){
1217 AliDebug(2,"update failed");
1218 }
1219 return updated;
1220}
1221//____________________________________________________________________-
4211bbc5 1222Int_t AliITStrackerUpgrade::CorrectForLayerMaterial(AliITStrackU *t,
1d9af2d5 1223 Int_t layerindex,
1224 Double_t oldGlobXYZ[3],
1225 TString direction) {
1226 //-------------------------------------------------------------------
1227 // Propagate beyond layer and correct for material
1228 // (material budget in different ways according to fUseTGeo value)
1229 // Add time if going outward (PropagateTo or PropagateToTGeo)
1230 //-------------------------------------------------------------------
1231
1232 // Define budget mode:
1233 // 0: material from AliITSRecoParam (hard coded)
1234 // 1: material from TGeo in stepsof X cm (on the fly)
1235 // X = AliITSRecoParam::GetStepSizeTGeo()
1236 // 2: material from lut
1237 // 3: material from TGeo in one step (same for all hypotheses)
1238 Int_t mode;
1239 switch(fUseTGeo) {
1240 case 0:
1241 mode=0;
1242 break;
1243 case 1:
1244 mode=1;
1245 break;
1246 case 2:
1247 mode=2;
1248 break;
1249 case 3:
1250 if(fTrackingPhase.Contains("Clusters2Tracks"))
1251 { mode=3; } else { mode=1; }
1252 break;
1253 case 4:
1254 if(fTrackingPhase.Contains("Clusters2Tracks"))
1255 { mode=3; } else { mode=2; }
1256 break;
1257 default:
1258 mode=0;
1259 break;
1260 }
1261 if(fTrackingPhase.Contains("Default")) {
1262 mode=0;
1263 }
1264 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1265 Double_t r = 0.;
db688ae2 1266 r=fSegmentation->GetRadius(layerindex);
1d9af2d5 1267 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
1268 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
1269 Double_t xToGo;
1270 if (!t->GetLocalXat(rToGo,xToGo)) {
1271 return 0;
1272 }
665c0bc7 1273 Int_t index=fNLayers*fCurrentEsdTrack+layerindex;
1d9af2d5 1274
1275
1276 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
1277 Int_t nsteps=1;
1278 // back before material (no correction)
1279 Double_t rOld,xOld;
1280 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1281 if (!t->GetLocalXat(rOld,xOld)) return 0;
1282 if (!t->Propagate(xOld)) return 0;
1283
1284 switch(mode) {
1285 case 1:
1286 x0=21.82;
db688ae2 1287 xOverX0 = fSegmentation->GetThickness(layerindex)/x0;
1d9af2d5 1288
1289 lengthTimesMeanDensity = xOverX0*x0;
1290 lengthTimesMeanDensity *= dir;
1291 // Bring the track beyond the material
1292 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1293 return 0;
1294 }
1295 break;
1296 case 0:
1297 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1298 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
1299 break;
1300 case 2:
1301 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
1302 xOverX0 = fxOverX0Layer[layerindex];
1303 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
1304 lengthTimesMeanDensity *= dir;
1305 // Bring the track beyond the material
1306 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1307 break;
1308 case 3:
665c0bc7 1309 if(!fxOverX0LayerTrks || index<0 || index>=fNLayers*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
1d9af2d5 1310 if(fxOverX0LayerTrks[index]<0) {
1311 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1312 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
1313 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1314 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1315 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
1316 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1317 return 1;
1318 }
1319 xOverX0 = fxOverX0LayerTrks[index];
1320 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
1321 lengthTimesMeanDensity *= dir;
1322 // Bring the track beyond the material
1323 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1324 return 0;
1325 }
1326 break;
1327 }
1328
1329
1330 return 1;
1331}
1332
1333
1334//_____________________________________________________________________________
0ac80088 1335Double_t AliITStrackerUpgrade::GetPredictedChi2MI(AliITStrackU* track, const AliITSRecPointU *cluster,Int_t layer)
1d9af2d5 1336{
1337 //
1338 // Compute predicted chi2
1339 //
1340 Float_t erry,errz,covyz;
1341 Float_t theta = track->GetTgl();
1342 Float_t phi = track->GetSnp();
1343 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
1344 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz,covyz);
1345 AliDebug(2,Form(" chi2: tr-cl %f %f tr X %f cl X %f",track->GetY()-cluster->GetY(),track->GetZ()-cluster->GetZ(),track->GetX(),cluster->GetX()));
1346 // Take into account the mis-alignment (bring track to cluster plane)
1347 Double_t xTrOrig=track->GetX();
1348 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
1349 AliDebug(2,Form(" chi2: tr-cl %f %f tr X %f cl X %f",track->GetY()-cluster->GetY(),track->GetZ()-cluster->GetZ(),track->GetX(),cluster->GetX()));
1350 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz,covyz);
1351 // Bring the track back to detector plane in ideal geometry
1352 // [mis-alignment will be accounted for in UpdateMI()]
1353 if (!track->Propagate(xTrOrig)) return 1000.;
1354 Float_t ny=0.,nz=0.;
1355 //GetNTeor(layer,cluster,theta,phi,ny,nz);
1356 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
1357 if (delta>1){
1358 chi2+=0.5*TMath::Min(delta/2,2.);
1359 chi2+=2.*cluster->GetDeltaProbability();
1360 }
1361 //
1362 track->SetNy(layer,ny);
1363 track->SetNz(layer,nz);
1364 track->SetSigmaY(layer,erry);
1365 track->SetSigmaZ(layer, errz);
1366 track->SetSigmaYZ(layer,covyz);
4211bbc5 1367
1d9af2d5 1368 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
1369 return chi2;
1370}
1371//________________________________________________________________
1372Int_t AliITStrackerUpgrade::GetError(Int_t /*layer*/,
0ac80088 1373 const AliITSRecPointU *cl,
1d9af2d5 1374 Float_t /*tgl*/,Float_t /*tgphitr*/,Float_t /*expQ*/,
1375 Float_t &erry,Float_t &errz,Float_t &covyz,
1376 Bool_t /*addMisalErr*/)
1377{
1378 //
1379 // Calculate cluster position error for the upgrade
1380 //
1381 Int_t retval=0;
1382 covyz=0.;
1383 retval = GetErrorOrigRecPoint(cl,erry,errz,covyz);
1384
1385
1386
1387 return retval;
1388
1389}
1390//____________________________________________________________________-
1391
0ac80088 1392Int_t AliITStrackerUpgrade::GetErrorOrigRecPoint(const AliITSRecPointU *cl,
1d9af2d5 1393 Float_t &erry,Float_t &errz,Float_t &covyz)
1394{
1395 //
1396 // Calculate cluster position error (just take error from AliITSRecPoint)
1397 //
1398 erry = TMath::Sqrt(cl->GetSigmaY2());
1399 errz = TMath::Sqrt(cl->GetSigmaZ2());
1400 covyz = cl->GetSigmaYZ();
1401 return 1;
1402}
1403//__________________________
0ac80088 1404void AliITStrackerUpgrade::GetNTeor(Int_t layer,const AliITSRecPointU* /*cl*/,
1d9af2d5 1405 Float_t tgl,Float_t tgphitr,
1406 Float_t &ny,Float_t &nz)
1407{
1408 //
1409 // Get "mean shape" (original parametrization from AliITStrackerMI)
1410 //
1411 tgl = TMath::Abs(tgl);
1412 tgphitr = TMath::Abs(tgphitr);
1413
1414 // SPD
1415 if (layer==0) {
1416 ny = 1.+tgphitr*3.2;
1417 nz = 1.+tgl*0.34;
1418 return;
1419 }
1420 if (layer==1) {
1421 ny = 1.+tgphitr*3.2;
1422 nz = 1.+tgl*0.28;
1423 return;
1424 }
1425 // SSD
1426 if (layer==4 || layer==5) {
1427 ny = 2.02+tgphitr*1.95;
1428 nz = 2.02+tgphitr*2.35;
1429 return;
1430 }
1431 // SDD
1432 ny = 6.6-2.7*tgphitr;
1433 nz = 2.8-3.11*tgphitr+0.45*tgl;
1434 return;
1435}
1436//_________________________________________________________________
1437Int_t AliITStrackerUpgrade::PropagateBack(AliESDEvent *event) {
1438 //--------------------------------------------------------------------
1439 // This functions propagates reconstructed ITS tracks back
1440 // The clusters must be loaded !
1441 //--------------------------------------------------------------------
1442 fTrackingPhase="PropagateBack";
1443 Int_t nentr=event->GetNumberOfTracks();
1444 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
1445 Int_t ntrk=0;
1446 for (Int_t i=0; i<nentr; i++) {
1447 AliESDtrack *esd=event->GetTrack(i);
1448
1449 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
1450 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
1451
f059e2be 1452 /*
1453 AliITStrackMI *t=0;
1454 try {
1d9af2d5 1455 t=new AliITStrackMI(*esd);
f059e2be 1456 } catch (const Char_t *msg) {
1d9af2d5 1457 //Warning("PropagateBack",msg);
1458 delete t;
1459 continue;
f059e2be 1460 }
1461 */
4211bbc5 1462 AliITStrackU *t = new AliITStrackU(*esd);
1d9af2d5 1463 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
1464
1465 ResetTrackToFollow(*t);
1466
1467 /*
1468 // propagate to vertex [SR, GSI 17.02.2003]
1469 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
1470 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1471 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
1472 fTrackToFollow.StartTimeIntegral();
1473 // from vertex to outside pipe
1474 CorrectForPipeMaterial(&fTrackToFollow,"outward");
1475 }*/
1476 // Start time integral and add distance from current position to vertex
1477 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
1478 fTrackToFollow.GetXYZ(xyzTrk);
1479 Double_t dst2 = 0.;
1480 for (Int_t icoord=0; icoord<3; icoord++) {
1481 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
1482 dst2 += di*di;
1483 }
1484 fTrackToFollow.StartTimeIntegral();
1485 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
1486
1487 fTrackToFollow.ResetCovariance(10.);
1488 fTrackToFollow.ResetClusters();
1489 //
665c0bc7 1490 Int_t inx[fNLayers];
1491 for (Int_t k=0; k<fNLayers; k++) inx[k]=-1;
1d9af2d5 1492 Int_t nclusters = t->GetNumberOfClusters();
1493 for(Int_t ncl=0;ncl<nclusters;ncl++){
1494 Int_t index = t-> GetClIndex(ncl);
1495 Int_t lay = (index & 0xf0000000) >> 28;
1496 inx[lay]=index;
1497 }
1498 //
665c0bc7 1499 if (RefitAtBase(fSegmentation->GetRadius(fNLayers-1),&fTrackToFollow,inx)) {
1d9af2d5 1500 //fTrackToFollow.SetLabel(t->GetLabel());//
1501 //fTrackToFollow.CookdEdx();
1502 //CookLabel(&fTrackToFollow,0.); //For comparison only
1503 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
db688ae2 1504 //UseClusters(&fTrackToFollow);
1d9af2d5 1505 ntrk++;
1506 }
1507 delete t;
1508 }
1509
1d9af2d5 1510 fTrackingPhase="Default";
1511
1512 return 0;
1513}
1514//_________________________________________________________________________
1515AliCluster *AliITStrackerUpgrade::GetCluster(Int_t index) const {
1516 //--------------------------------------------------------------------
1517 // Return pointer to a given cluster
1518 //--------------------------------------------------------------------
1519 Int_t l=(index & 0xf0000000) >> 28;
0a64515a 1520 Int_t c=(index & 0x0fffffff) >> 0;
84ab81bf 1521 AliDebug(2,Form("index %i cluster index %i layer %i", index,c,l));
0a64515a 1522 return fLayers[l]->GetCluster(c);
1d9af2d5 1523}
1524//______________________________________________________________________________
4211bbc5 1525Int_t AliITStrackerUpgrade::CorrectForPipeMaterial(AliITStrackU *t, TString direction) {
f059e2be 1526 //-------------------------------------------------------------------
1527 // Propagate beyond beam pipe and correct for material
1528 // (material budget in different ways according to fUseTGeo value)
1529 // Add time if going outward (PropagateTo or PropagateToTGeo)
1530 //-------------------------------------------------------------------
1531
1532 // Define budget mode:
1533 // 0: material from AliITSRecoParam (hard coded)
1534 // 1: material from TGeo in one step (on the fly)
1535 // 2: material from lut
1536 // 3: material from TGeo in one step (same for all hypotheses)
1537 Int_t mode;
1538 switch(fUseTGeo) {
1539 case 0:
1540 mode=0;
1541 break;
1542 case 1:
1543 mode=1;
1544 break;
1545 case 2:
1546 mode=2;
1547 break;
1548 case 3:
1549 if(fTrackingPhase.Contains("Clusters2Tracks"))
1550 { mode=3; } else { mode=1; }
1551 break;
1552 case 4:
1553 if(fTrackingPhase.Contains("Clusters2Tracks"))
1554 { mode=3; } else { mode=2; }
1555 break;
1556 default:
1557 mode=0;
1558 break;
1559 }
1560 if(fTrackingPhase.Contains("Default")) mode=0;
1561 Int_t index=fCurrentEsdTrack;
1562
1563 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1564 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
1565 Double_t xToGo;
1566 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
1567
1568 Double_t xOverX0,x0,lengthTimesMeanDensity;
1569
1570 switch(mode) {
1571 case 0:
1572 xOverX0 = AliITSRecoParam::GetdPipe();
1573 x0 = AliITSRecoParam::GetX0Be();
1574 lengthTimesMeanDensity = xOverX0*x0;
1575 lengthTimesMeanDensity *= dir;
1576 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1577 break;
1578 case 1:
1579 if (!t->PropagateToTGeo(xToGo,1)) return 0;
1580 break;
1581 case 2:
1582 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
1583 xOverX0 = fxOverX0Pipe;
1584 lengthTimesMeanDensity = fxTimesRhoPipe;
1585 lengthTimesMeanDensity *= dir;
1586 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1587 break;
1588 case 3:
1589 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
1590 if(fxOverX0PipeTrks[index]<0) {
1591 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
1592 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1593 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1594 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
1595 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1596 return 1;
1597 }
1598 xOverX0 = fxOverX0PipeTrks[index];
1599 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
1600 lengthTimesMeanDensity *= dir;
1601 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1602 break;
1603 }
1604
1605 return 1;
1d9af2d5 1606}
1607//__________________________________________________________________________
1608Int_t AliITStrackerUpgrade::RefitInward(AliESDEvent *event) {
1609 //--------------------------------------------------------------------
1610 // This functions refits ITS tracks using the
1611 // "inward propagated" TPC tracks
1612 // The clusters must be loaded !
1613 //--------------------------------------------------------------------
1614 fTrackingPhase="RefitInward";
1615 Int_t nentr=event->GetNumberOfTracks();
1616 for (Int_t i=0; i<nentr; i++) {
1617 AliESDtrack *esd=event->GetTrack(i);
1618
1619 // if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
1620 // if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
1621 //if (esd->GetStatus()&AliESDtrack::kTPCout)
1622 // if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
4211bbc5 1623 AliITStrackU *t=0;
1d9af2d5 1624 try {
4211bbc5 1625 t=new AliITStrackU(*esd);
1d9af2d5 1626 } catch (const Char_t *msg) {
1627 //Warning("RefitInward",msg);
1628 delete t;
1629 continue;
1630 }
1631
1632 ResetTrackToFollow(*t);
1633 // fTrackToFollow.ResetClusters();
1634 // if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
1635 // fTrackToFollow.ResetCovariance(10.);
1636 //Refitting...
1637 //The beam pipe
f059e2be 1638 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1639 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
1640 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
1641 Double_t r[3]={0.,0.,0.};
1642 Double_t maxD=3.;
1643 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
1644 }
1d9af2d5 1645 delete t;
1646 }
1647
1648 fTrackingPhase="Default";
1649 return 0;
1650}
1651
1652
1653