1 /**************************************************************************
2 * Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 **************************************************************************/
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 ////////////////////////////////////////////////////
29 #include <TObjArray.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"
38 #include "AliITSRecPoint.h"
39 #include "AliITStrackU.h"
40 #include "AliITStrackerMI.h"
41 #include "AliITSlayerUpgrade.h"
42 #include "AliITSsegmentationUpgrade.h"
43 #include "AliITStrackerUpgrade.h"
44 #include "AliITSReconstructor.h"
48 ClassImp(AliITStrackerUpgrade)
50 //____________________________________________________________________________
51 AliITStrackerUpgrade::AliITStrackerUpgrade():AliITStrackerMI(),
52 fNLayer(AliITSsegmentationUpgrade::GetNLayers()),
70 fInnerStartLayer(AliITSsegmentationUpgrade::GetNLayers()),
77 // Default constructor
81 //________________________________________________________________________
82 AliITStrackerUpgrade::AliITStrackerUpgrade(const AliITStrackerUpgrade& tracker):AliITStrackerMI(),
83 fNLayer(tracker.fNLayer),
84 fPhiEstimate(tracker.fPhiEstimate),
85 fITSStandAlone(tracker.fITSStandAlone),
86 fLambdac(tracker.fLambdac),
88 fCoef1(tracker.fCoef1),
89 fCoef2(tracker.fCoef2),
90 fCoef3(tracker.fCoef3),
91 fNloop(tracker.fNloop),
92 fPhiWin(tracker.fPhiWin),
93 fLambdaWin(tracker.fLambdaWin),
95 fVertexer(tracker.fVertexer),
96 fListOfTracks(tracker.fListOfTracks),
97 fListOfUTracks(tracker.fListOfUTracks),
98 fITSclusters(tracker.fITSclusters),
99 fInwardFlag(tracker.fInwardFlag),
100 fOuterStartLayer(tracker.fOuterStartLayer),
101 fInnerStartLayer(tracker.fInnerStartLayer),
102 fMinNPoints(tracker.fMinNPoints),
103 fMinQ(tracker.fMinQ),
104 fLayers(tracker.fLayers),
105 fSegmentation(tracker.fSegmentation),
106 fCluLayer(tracker.fCluLayer),
107 fCluCoord(tracker.fCluCoord) {
109 for(Int_t i=0;i<2;i++){
110 fPoint1[i]=tracker.fPoint1[i];
111 fPoint2[i]=tracker.fPoint2[i];
112 fPoint3[i]=tracker.fPoint3[i];
113 fPointc[i]=tracker.fPointc[i];
115 if(tracker.fVertexer && tracker.fVert){
116 fVert = new AliESDVertex(*tracker.fVert);
119 fVert = tracker.fVert;
121 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++){
122 fCluLayer[i] = tracker.fCluLayer[i];
123 fCluCoord[i] = tracker.fCluCoord[i];
126 //______________________________________________________________________
127 AliITStrackerUpgrade& AliITStrackerUpgrade::operator=(const AliITStrackerUpgrade& source){
128 // Assignment operator.
129 this->~AliITStrackerUpgrade();
130 new(this) AliITStrackerUpgrade(source);
135 //____________________________________________________________________________
136 AliITStrackerUpgrade::~AliITStrackerUpgrade(){
138 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
139 // and is deleted here
141 if(fVert)delete fVert;
146 if(fPhiWin)delete []fPhiWin;
147 if(fLambdaWin)delete []fLambdaWin;
148 fListOfTracks->Delete();
149 delete fListOfTracks;
150 fListOfUTracks->Delete();
151 delete fListOfUTracks;
153 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++){
155 fCluLayer[i]->Delete();
162 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++){
164 fCluCoord[i]->Delete();
171 if(fSegmentation) delete fSegmentation;
174 //____________________________________________________________________________
175 Int_t AliITStrackerUpgrade::Clusters2Tracks(AliESDEvent *event){
176 // This method is used to find and fit the tracks. By default the corresponding
177 // method in the parent class is invoked. In this way a combined tracking
178 // TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
179 // is done in the ITS only. In the standard reconstruction chain this option
180 // can be set via AliReconstruction::SetOption("ITS","onlyITS")
183 rc=AliITStrackerMI::Clusters2Tracks(event);
186 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
189 rc=FindTracks(event,kFALSE);
190 if(AliITSReconstructor::GetRecoParam()->GetSAUseAllClusters()==kTRUE) {
191 rc=FindTracks(event,kTRUE);
196 //_________________________________________________-
197 void AliITStrackerUpgrade::Init(){
198 // Reset all data members
200 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
210 Int_t nLoops=AliITSReconstructor::GetRecoParam()->GetNLoopsSA();
212 SetFixedWindowSizes();
214 Double_t phimin=AliITSReconstructor::GetRecoParam()->GetMinPhiSA();
215 Double_t phimax=AliITSReconstructor::GetRecoParam()->GetMaxPhiSA();
216 Double_t lambmin=AliITSReconstructor::GetRecoParam()->GetMinLambdaSA();
217 Double_t lambmax=AliITSReconstructor::GetRecoParam()->GetMaxLambdaSA();
218 SetCalculatedWindowSizes(nLoops,phimin,phimax,lambmin,lambmax);
220 fMinQ=AliITSReconstructor::GetRecoParam()->GetSAMinClusterCharge();
222 SetOuterStartLayer(1);
224 fListOfTracks=new TClonesArray("AliITStrackMI",100);
225 fListOfUTracks=new TClonesArray("AliITStrackU",100);
226 fLayers=new AliITSlayerUpgrade*[AliITSsegmentationUpgrade::GetNLayers()];//to be fixed
230 for(Int_t layer=0; layer<AliITSsegmentationUpgrade::GetNLayers(); layer++){
233 fLayers[layer] = new AliITSlayerUpgrade(p,zC);
236 fSegmentation = new AliITSsegmentationUpgrade();
239 //_______________________________________________________________________
240 Int_t AliITStrackerUpgrade::LoadClusters(TTree *clusTree){
242 // Load clusters for tracking
245 TClonesArray statITSCluster("AliITSRecPoint");
246 TClonesArray *ITSCluster = &statITSCluster;
248 TBranch* itsClusterBranch=clusTree->GetBranch("ITSRecPoints");
249 if (!itsClusterBranch){
250 AliError("can't get the branch with the ITS clusters ! \n");
253 itsClusterBranch->SetAddress(&ITSCluster);
254 clusTree->GetEvent(0);
255 Int_t nCluster = ITSCluster->GetEntriesFast();
256 for(Int_t i=0; i<nCluster; i++){
257 AliITSRecPoint *recp = (AliITSRecPoint*)ITSCluster->UncheckedAt(i);
258 fLayers[recp->GetLayer()]->InsertCluster(new AliITSRecPoint(*recp));
261 SetClusterTree(clusTree);
265 //_______________________________________________________
266 void AliITStrackerUpgrade::ResetForFinding(){
267 // Reset data members used in all loops during track finding
269 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
277 fListOfTracks->Clear();
278 fListOfUTracks->Clear();
283 //______________________________________________________________________
284 Int_t AliITStrackerUpgrade::FindTracks(AliESDEvent* event,Bool_t useAllClusters){
286 // Track finder using the ESD object
287 AliDebug(2,Form(" field is %f",event->GetMagneticField()));
288 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
290 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
294 //Reads event and mark clusters of traks already found, with flag kITSin
295 Int_t nentr=event->GetNumberOfTracks();
296 if(!useAllClusters) {
298 AliESDtrack *track=event->GetTrack(nentr);
299 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
301 Int_t ncl = track->GetITSclusters(idx);
302 for(Int_t k=0;k<ncl;k++){
303 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
304 cll->SetBit(kSAflag);
310 AliESDtrack *track=event->GetTrack(nentr);
311 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
313 Int_t ncl = track->GetITSclusters(idx);
314 for(Int_t k=0;k<ncl;k++){
315 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
316 cll->ResetBit(kSAflag);
322 Double_t primaryVertex[3];
323 event->GetVertex()->GetXYZ(primaryVertex);
324 Int_t nclusters[AliITSsegmentationUpgrade::GetNLayers()];//={0,0,0,0,0,0};
325 for(Int_t i=0; i<AliITSsegmentationUpgrade::GetNLayers(); i++){
329 Int_t dmar[AliITSsegmentationUpgrade::GetNLayers()];//={0,0,0,0,0,0};
330 for(Int_t i=0; i<AliITSsegmentationUpgrade::GetNLayers(); i++){
334 if (fCluLayer == 0) {
335 fCluLayer = new TClonesArray*[AliITSsegmentationUpgrade::GetNLayers()];
336 fCluCoord = new TClonesArray*[AliITSsegmentationUpgrade::GetNLayers()];
337 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++) {
342 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++){
343 if (!ForceSkippingOfLayer(i)) {
344 for(Int_t cli=0;cli<fLayers[i]->GetNumberOfClusters();cli++){
345 AliITSRecPoint* cls = (AliITSRecPoint*)fLayers[i]->GetCluster(cli);
346 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
347 if(cls->GetQ()==0) continue; //fake clusters dead zones
348 if(i>1 && cls->GetQ()<=fMinQ) continue; // cut on SDD and SSD cluster charge
354 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
356 fCluLayer[i]->Delete();
357 fCluLayer[i]->Expand(nclusters[i]);
360 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
362 fCluCoord[i]->Delete();
363 fCluCoord[i]->Expand(nclusters[i]);
366 for(Int_t ilay=0;ilay<AliITSsegmentationUpgrade::GetNLayers();ilay++){
367 TClonesArray &clulay = *fCluLayer[ilay];
368 TClonesArray &clucoo = *fCluCoord[ilay];
369 if (!ForceSkippingOfLayer(ilay)){
370 AliDebug(2,Form("number of clusters in layer %i : %i",ilay,fLayers[ilay]->GetNumberOfClusters()));
371 for(Int_t cli=0;cli<fLayers[ilay]->GetNumberOfClusters();cli++){
372 AliITSRecPoint* cls = (AliITSRecPoint*)fLayers[ilay]->GetCluster(cli);
373 if(cls->TestBit(kSAflag)==kTRUE) continue;
374 if(cls->GetQ()==0) continue;
375 Double_t phi=0;Double_t lambda=0;
376 Double_t x=0;Double_t y=0;Double_t z=0;
377 Float_t sx=0;Float_t sy=0;Float_t sz=0;
378 GetCoorAngles(cls,phi,lambda,x,y,z,primaryVertex);
379 GetCoorErrors(cls,sx,sy,sz);
380 new (clulay[dmar[ilay]]) AliITSRecPoint(*cls);
381 new (clucoo[dmar[ilay]]) AliITSclusterTable(x,y,z,sx,sy,sz,phi,lambda,cli);
384 } else AliDebug(2,Form("Force skipping layer %i",ilay));
391 static Int_t nClusLay[6];//counter for clusters on each layer
392 Int_t startLayForSeed=0;
393 Int_t lastLayForSeed=fOuterStartLayer;
394 Int_t nSeedSteps=lastLayForSeed-startLayForSeed;
397 startLayForSeed=AliITSsegmentationUpgrade::GetNLayers()-1;
398 lastLayForSeed=fInnerStartLayer;
399 nSeedSteps=startLayForSeed-lastLayForSeed;
402 // loop on minimum number of points
403 for(Int_t iMinNPoints=AliITSsegmentationUpgrade::GetNLayers(); iMinNPoints>=fMinNPoints; iMinNPoints--) {
404 // loop on starting layer for track finding
405 for(Int_t iSeedLay=0; iSeedLay<=nSeedSteps; iSeedLay++) {
406 Int_t theLay=startLayForSeed+iSeedLay*seedStep;
407 if(ForceSkippingOfLayer(theLay)) continue;
408 Int_t minNPoints=iMinNPoints-theLay;
409 if(fInwardFlag) minNPoints=iMinNPoints-(AliITSsegmentationUpgrade::GetNLayers()-1-theLay);
410 for(Int_t i=theLay+1;i<AliITSsegmentationUpgrade::GetNLayers();i++)
411 if(ForceSkippingOfLayer(i))
413 if(minNPoints<fMinNPoints) continue;
415 // loop on phi and lambda window size
416 for(Int_t nloop=0;nloop<fNloop;nloop++){
417 Int_t nclTheLay=fCluLayer[theLay]->GetEntries();
420 Bool_t useRP=SetFirstPoint(theLay,nclTheLay,primaryVertex);
426 for(kk=0;kk<AliITSsegmentationUpgrade::GetNLayers();kk++) nClusLay[kk] = 0;
429 nClusLay[kk] = SearchClusters(theLay,fPhiWin[nloop],fLambdaWin[nloop],
430 &trs,primaryVertex[2],pflag);
431 Int_t nextLay=theLay+seedStep;
436 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
437 &trs,primaryVertex[2],pflag);
442 fPoint3[0]=fPointc[0];
443 fPoint3[1]=fPointc[1];
449 if(nextLay<0 || nextLay==AliITSsegmentationUpgrade::GetNLayers()) goon=kFALSE;
455 for(Int_t nnp=0;nnp<AliITSsegmentationUpgrade::GetNLayers()-theLay;nnp++){
456 if(nClusLay[nnp]!=0) layOK+=1;
459 for(Int_t nnp=theLay; nnp>=0; nnp--){
460 if(nClusLay[nnp]!=0) layOK+=1;
463 if(layOK>=minNPoints){
464 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]));
465 AliITStrackV2* tr2 = 0;
466 Bool_t onePoint = kFALSE;
467 tr2 = FitTrack(&trs,primaryVertex,onePoint);
471 AliDebug(2,Form("---NPOINTS fit: %d\n",tr2->GetNumberOfClusters()));
473 StoreTrack(tr2,event,useAllClusters);
478 }//end loop on clusters of theLay
479 } //end loop on window sizes
480 } //end loop on theLay
481 }//end loop on min points
482 if(!useAllClusters) AliInfo(Form("Number of found tracks: %d",event->GetNumberOfTracks()));
489 //________________________________________________________________________
491 AliITStrackV2* AliITStrackerUpgrade::FitTrack(AliITStrackU* tr,Double_t *primaryVertex,Bool_t onePoint) {
494 const Int_t kMaxClu=AliITStrackU::kMaxNumberOfClusters;
497 static Int_t clind[6][kMaxClu];
498 static Int_t clmark[6][kMaxClu];
500 static AliITSRecPoint *listlayer[6][kMaxClu];
502 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++) {
504 for(Int_t j=0;j<kMaxClu; j++){
510 Int_t inx[AliITSsegmentationUpgrade::GetNLayers()];
511 for (Int_t k=0; k<AliITSsegmentationUpgrade::GetNLayers(); k++) inx[k]=-1;
512 Int_t nclusters = tr->GetNumberOfClustersU();
513 for(Int_t ncl=0;ncl<nclusters;ncl++){
514 Int_t index = tr->GetClusterIndexU(ncl);
515 Int_t lay = (index & 0xf0000000) >> 28;
516 //Int_t cli = index&0x0fffffff;
517 //AliITSRecPoint* cl = (AliITSRecPoint*)fLayers[lay]->GetCluster(cli);
518 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(index);
519 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
522 Int_t nInLay=end[lay];
523 listlayer[lay][nInLay]=cl;
524 clind[lay][nInLay]=index;
528 for(Int_t nlay=0;nlay<AliITSsegmentationUpgrade::GetNLayers();nlay++){
529 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
530 Int_t mark = tr->GetClusterMark(nlay,ncl);
531 clmark[nlay][ncl]=mark;
536 Int_t firstLay=-1,secondLay=-1;
537 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++) {
543 } else if(secondLay==-1) {
549 if(firstLay==-1 || (secondLay==-1 && !onePoint)) return 0;
550 TClonesArray &arrMI= *fListOfTracks;
551 TClonesArray &arrSA= *fListOfUTracks;
552 Int_t nFoundTracks=0;
554 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
555 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0][l0];
556 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
557 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1][l1];
558 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
559 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2][l2];
560 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
561 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3][l3];
562 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
563 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4][l4];
564 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
565 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5][l5];
568 Double_t x1,y1,z1,sx1,sy1,sz1;
569 Double_t x2,y2,z2,sx2,sy2,sz2;
570 AliITSRecPoint* p1=0;
571 AliITSRecPoint* p2=0;
572 Int_t index1=0,index2=0;
578 index1=clind[0][l0];mrk1=clmark[0][l0];
582 index1=clind[1][l1];mrk1=clmark[1][l1];
586 index1=clind[2][l2];mrk1=clmark[2][l2];
590 index1=clind[3][l3];mrk1=clmark[3][l3];
594 index1=clind[4][l4];mrk1=clmark[4][l4];
601 index2=clind[1][l1];mrk2=clmark[1][l1];
605 index2=clind[2][l2];mrk2=clmark[2][l2];
609 index2=clind[3][l3];mrk2=clmark[3][l3];
613 index2=clind[4][l4];mrk2=clmark[4][l4];
617 index2=clind[5][l5];mrk2=clmark[5][l5];
626 Double_t radius = 0.;
627 Double_t yclu1 = p1->GetY();
628 Double_t zclu1 = p1->GetZ();
629 layer=p1->GetLayer();
630 radius = fSegmentation->GetRadius(layer);
631 Double_t cv=0.,tgl2=0.,phi2=0.;
633 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1);
643 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2);
650 cv = Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
651 tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
652 phi2 = TMath::ATan2((y2-y1),(x2-x1));
656 xz[0]= p1->GetDetLocalX();
657 xz[1]= p1->GetDetLocalZ();
659 check2 = fSegmentation->DetToGlobal(layer,xz[0], xz[1],x,y,z);
662 Double_t phiclrad, phicldeg;
663 phiclrad=TMath::ATan2(y,x);
664 if (phiclrad<0) phiclrad+=TMath::TwoPi();
665 else if (phiclrad>=TMath::TwoPi()) phiclrad-=TMath::TwoPi();
667 phicldeg=180.*phiclrad/TMath::Pi();
668 Int_t ladder=(Int_t)(phicldeg/18.);//virtual segmentation
669 Double_t alpha= (ladder*18.+9.)*TMath::Pi()/180.;
672 AliITStrackU trac(alpha,radius,yclu1,zclu1,phi2,tgl2,cv,1);
676 trac.AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0);
677 trac.AddClusterMark(5,clmark[5][l5]);
680 trac.AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0);
681 trac.AddClusterMark(4,clmark[4][l4]);
684 trac.AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0);
685 trac.AddClusterMark(3,clmark[3][l3]);
688 trac.AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0);
689 trac.AddClusterMark(2,clmark[2][l2]);
692 trac.AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0);
693 trac.AddClusterMark(1,clmark[1][l1]);
696 trac.AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0);
697 trac.AddClusterMark(0,clmark[0][l0]);
700 //fit with Kalman filter using AliITStrackerMI::RefitAtBase()
701 AliITStrackU ot(trac);
702 ot.ResetCovariance(10.);
705 // Propagate inside the innermost layer with a cluster
706 if(ot.Propagate(ot.GetX()-0.1*ot.GetX())) {
707 if(RefitAtBase(AliITSRecoParam::GetrInsideITSscreen(),&ot,inx)){ //fit from layer 1 to layer 6
708 AliITStrackMI otrack2(ot);
709 otrack2.ResetCovariance(10.);
710 otrack2.ResetClusters();
712 //fit from layer 6 to layer 1
713 if(RefitAtBase(/*AliITSRecoParam::GetrInsideSPD1()*/fSegmentation->GetRadius(0)-0.3,&otrack2,inx)) {//check clind
714 new(arrMI[nFoundTracks]) AliITStrackMI(otrack2);
715 new(arrSA[nFoundTracks]) AliITStrackU(trac);
731 if(fListOfTracks->GetEntries()==0) return 0;
733 Int_t lowchi2 = FindTrackLowChiSquare();
734 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
735 AliITStrackU* trsa = (AliITStrackU*)fListOfUTracks->At(lowchi2);
741 CookLabel(otrack,0.); //MI change - to see fake ratio
742 Int_t label=FindLabel(otrack);
743 otrack->SetLabel(label);
746 Int_t indexc[AliITSsegmentationUpgrade::GetNLayers()];
747 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++) indexc[i]=0;
748 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
749 indexc[nind] = otrack->GetClusterIndex(nind);
752 //remove clusters of found track
753 for(Int_t nlay=0;nlay<AliITSsegmentationUpgrade::GetNLayers();nlay++){
754 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
755 Int_t index = trsa->GetClusterMark(nlay,cln);
756 fCluLayer[nlay]->RemoveAt(index);
757 RemoveClusterCoord(nlay,index);
758 fCluLayer[nlay]->Compress();
765 //_______________________________________________________
766 void AliITStrackerUpgrade::StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) /*const*/
769 // Add new track to the ESD
771 AliESDtrack outtrack;
772 outtrack.UpdateTrackParams(t,AliESDtrack::kITSin);
773 if(pureSA) outtrack.SetStatus(AliESDtrack::kITSpureSA);
774 outtrack.SetStatus(AliESDtrack::kITSout);
775 outtrack.SetStatus(AliESDtrack::kITSrefit);
776 Double_t sdedx[4]={0.,0.,0.,0.};
777 for(Int_t i=0; i<4; i++) sdedx[i]=t->GetSampledEdx(i);
778 outtrack.SetITSdEdxSamples(sdedx);
779 event->AddTrack(&outtrack);
784 //_______________________________________________________
785 Int_t AliITStrackerUpgrade::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackU* trs,Double_t /*zvertex*/,Int_t pflag){
786 //function used to to find the clusters associated to the track
788 AliDebug(2,"Starting...");
789 if(ForceSkippingOfLayer(layer)) {
790 AliDebug(2,Form("Forcing skipping of layer %i. Exiting",layer));
795 Double_t r=fSegmentation->GetRadius(layer);
797 Float_t cx1,cx2,cy1,cy2;
798 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
799 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
801 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
802 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
803 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
807 Int_t ncl = fCluLayer[layer]->GetEntries();
808 AliDebug(2,Form(" Number of clusters %i in layer %i.",ncl,layer));
809 for (Int_t index=0; index<ncl; index++) {
810 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
812 if (c->GetQ()<=0) continue;
813 if(layer>1 && c->GetQ()<=fMinQ) continue;
815 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
822 if (TMath::Abs(phi-fPhiEstimate)>phiwindow)
827 Double_t lambda = arr->GetLambda();
828 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
830 if(trs->GetNumberOfClustersU()==trs->GetMaxNumberOfClusters()) return 0;
831 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
832 Int_t orind = arr->GetOrInd();
833 trs->AddClusterU(layer,orind);
834 trs->AddClusterMark(layer,index);
840 fPointc[0]=arr->GetX();
841 fPointc[1]=arr->GetY();
846 //________________________________________________________________
847 Bool_t AliITStrackerUpgrade::SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex){
848 // Sets the first point (seed) for tracking
850 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[lay]->At(clu);
851 if(!cl) return kFALSE;
852 if (cl->GetQ()<=0) return kFALSE;
853 if(lay>1 && cl->GetQ()<=fMinQ) return kFALSE;
854 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(lay,clu);
855 fPhic = arr->GetPhi();
856 fLambdac = arr->GetLambda();
857 fPhiEstimate = fPhic;
858 fPoint1[0]=primaryVertex[0];
859 fPoint1[1]=primaryVertex[1];
860 fPoint2[0]=arr->GetX();
861 fPoint2[1]=arr->GetY();
865 //________________________________________________________________
866 void AliITStrackerUpgrade::UpdatePoints(){
867 //update of points for the estimation of the curvature
869 fPoint2[0]=fPoint3[0];
870 fPoint2[1]=fPoint3[1];
871 fPoint3[0]=fPointc[0];
872 fPoint3[1]=fPointc[1];
877 //___________________________________________________________________
878 Int_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){
880 //given (x,y) of three recpoints (in global coordinates)
881 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
883 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
885 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
886 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
887 c = -x1*x1-y1*y1-a*x1-b*y1;
890 //__________________________________________________________________________
891 Int_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){
893 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
894 //c2 is -rlayer*rlayer
898 Double_t aA = (b1*b1)/(a1*a1)+1;
899 Double_t bB = (-2*m*b1/(a1*a1));
900 Double_t cC = c2+(m*m)/(a1*a1);
901 Double_t dD = bB*bB-4*aA*cC;
904 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
905 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
906 x1 = (c2-c1-b1*y1)/a1;
907 x2 = (c2-c1-b1*y2)/a1;
911 //____________________________________________________________________
912 Double_t AliITStrackerUpgrade::Curvature(Double_t x1,Double_t y1,Double_t
913 x2,Double_t y2,Double_t x3,Double_t y3){
915 //calculates the curvature of track
916 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
918 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
919 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
920 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
923 if((a*a+b*b-4*c)<0) return 0;
924 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
927 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
928 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
929 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
930 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
937 //____________________________________________________________________
938 Double_t AliITStrackerUpgrade::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
940 //Returns the point closest to pp
942 Double_t diff1 = p1-pp;
943 Double_t diff2 = p2-pp;
945 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
946 else fPhiEstimate=p2;
952 //_________________________________________________________________
953 Int_t AliITStrackerUpgrade::FindTrackLowChiSquare() const {
954 // returns track with lowest chi square
955 Int_t dim=fListOfTracks->GetEntries();
957 AliITStrackV2* trk = (AliITStrackV2*)fListOfTracks->At(0);
958 Double_t minChi2=trk->GetChi2();
960 for(Int_t i=1;i<dim;i++){
961 trk = (AliITStrackV2*)fListOfTracks->At(i);
962 Double_t chi2=trk->GetChi2();
971 //__________________________________________________________
972 Int_t AliITStrackerUpgrade::FindLabel(AliITStrackV2* track) const {
975 Int_t labl[AliITSsegmentationUpgrade::GetNLayers()][3];
976 Int_t cnts[AliITSsegmentationUpgrade::GetNLayers()][3];
977 for(Int_t j=0;j<AliITSsegmentationUpgrade::GetNLayers();j++){
978 for(Int_t k=0;k<3;k++){
984 for(Int_t i=0;i<track->GetNumberOfClusters(); i++) {
985 Int_t indexc = track->GetClusterIndex(i);
986 AliITSRecPoint* cl = (AliITSRecPoint*)GetCluster(indexc);
987 AliDebug(2,Form(" cluster index %i ",indexc));
988 Int_t iLayer=cl->GetLayer();
989 for(Int_t k=0;k<3;k++){
990 labl[iLayer][k]=cl->GetLabel(k);
991 if(labl[iLayer][k]<0) iNotLabel++;
994 if(iNotLabel==3*track->GetNumberOfClusters()) return -2;
996 for(Int_t j1=0;j1<AliITSsegmentationUpgrade::GetNLayers(); j1++) {
997 for(Int_t j2=0; j2<j1; j2++){
998 for(Int_t k1=0; k1<3; k1++){
999 for(Int_t k2=0; k2<3; k2++){
1000 if(labl[j1][k1]>=0 && labl[j1][k1]==labl[j2][k2] && cnts[j2][k2]>0){
1012 for(Int_t j=0;j<AliITSsegmentationUpgrade::GetNLayers();j++){
1013 for(Int_t k=0;k<3;k++){
1014 if(cnts[j][k]>cntMax && labl[j][k]>=0){
1022 for(Int_t i=0;i<AliITSsegmentationUpgrade::GetNLayers();i++)
1023 if(labl[i][0]==label || labl[i][1]==label || labl[i][2]==label) lflag++;
1024 if(lflag<track->GetNumberOfClusters()) label = -label;
1027 //_____________________________________________________________________________
1028 /*Int_t AliITStrackerUpgrade::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,
1029 Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){
1032 //function used to assign label to the found track. If track is fake, the label is negative
1034 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1035 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1036 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1037 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1038 Int_t lflag=0;Int_t num=6;
1039 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1041 for(Int_t i=0;i<num;i++){
1042 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1045 if(lflag>=minNPoints) return ll;
1051 //_____________________________________________________________________________
1052 void AliITStrackerUpgrade::SetCalculatedWindowSizes(Int_t n, Float_t phimin, Float_t phimax, Float_t lambdamin, Float_t lambdamax){
1053 // Set sizes of the phi and lambda windows used for track finding
1055 if(fPhiWin) delete [] fPhiWin;
1056 if(fLambdaWin) delete [] fLambdaWin;
1057 fPhiWin = new Double_t[fNloop];
1058 fLambdaWin = new Double_t[fNloop];
1059 Float_t stepPhi=(phimax-phimin)/(Float_t)(fNloop-1);
1060 Float_t stepLambda=(lambdamax-lambdamin)/(Float_t)(fNloop-1);
1061 for(Int_t k=0;k<fNloop;k++){
1062 Float_t phi=phimin+k*stepPhi;
1063 Float_t lam=lambdamin+k*stepLambda;
1068 //_____________________________________________________________________________
1069 void AliITStrackerUpgrade::SetFixedWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1070 // Set sizes of the phi and lambda windows used for track finding
1072 if(phi){ // user defined values
1073 fPhiWin = new Double_t[fNloop];
1074 fLambdaWin = new Double_t[fNloop];
1075 for(Int_t k=0;k<fNloop;k++){
1077 fLambdaWin[k]=lam[k];
1080 else { // default values
1082 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
1083 0.005,0.0053,0.0055,
1084 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1085 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
1086 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1087 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1089 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1090 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1091 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
1098 fPhiWin = new Double_t[fNloop];
1099 fLambdaWin = new Double_t[fNloop];
1101 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes();
1103 for(Int_t k=0;k<fNloop;k++){
1104 fPhiWin[k]=phid[k]*factor;
1105 fLambdaWin[k]=lambdad[k]*factor;
1111 //_______________________________________________________________________
1112 void AliITStrackerUpgrade::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Double_t &x, Double_t &y,Double_t &z,Double_t* vertex){
1113 //Returns values of phi (azimuthal) and lambda angles for a given cluster
1115 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1116 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1117 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1119 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1120 Double_t phi1=TMath::Pi()/2+alpha;
1121 if (lay==1) phi1+=TMath::Pi();
1123 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1124 Float_t r=tx*cp+ty*sp;
1126 xyz= r*cp - cl->GetY()*sp;
1127 y= r*sp + cl->GetY()*cp;
1132 xz[0]= cl->GetDetLocalX();
1133 xz[1]= cl->GetDetLocalZ() ;
1136 ilayer = cl->GetLayer();
1137 check2 = fSegmentation->DetToGlobal(ilayer,xz[0], xz[1],x,y,z);
1140 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
1141 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1144 //________________________________________________________________________
1145 void AliITStrackerUpgrade::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
1147 //returns sigmax, y, z of cluster in global coordinates
1149 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1151 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
1153 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1154 Double_t phi=TMath::Pi()/2+alpha;
1155 if (lay==1) phi+=TMath::Pi();
1157 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
1160 cl->GetGlobalCov(covm);
1161 sx=TMath::Sqrt(covm[0]);
1162 sy=TMath::Sqrt(covm[3]);
1163 sz=TMath::Sqrt(covm[5]);
1168 // cl->GetGlobalCov(covm);
1169 // sx=12*1e-04;//TMath::Sqrt(covm[0]);
1170 // sy=12*1e-04;//TMath::Sqrt(covm[3]);
1171 // sz=40*1e-04;//TMath::Sqrt(covm[5]);
1173 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1174 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1175 sz = TMath::Sqrt(cl->GetSigmaZ2());
1178 //_____________________________________________________________
1179 void AliITStrackerUpgrade::UnloadClusters() {
1180 //--------------------------------------------------------------------
1181 //This function unloads ITS clusters
1182 //--------------------------------------------------------------------
1183 for (Int_t i=0; i<AliITSsegmentationUpgrade::GetNLayers(); i++) fLayers[i]->ResetClusters();
1185 //______________________________________________________________________
1186 Bool_t AliITStrackerUpgrade::RefitAtBase(Double_t xx,AliITStrackMI *track,
1187 const Int_t *clusters)
1189 //--------------------------------------------------------------------
1190 // Simplified version for ITS upgrade studies -- does not use module info
1191 //--------------------------------------------------------------------
1192 Int_t index[AliITSsegmentationUpgrade::GetNLayers()];
1194 for (k=0; k<AliITSsegmentationUpgrade::GetNLayers(); k++) index[k]=-1;
1196 for (k=0; k<AliITSsegmentationUpgrade::GetNLayers(); k++) {
1197 index[k]=clusters[k];
1201 if(track->GetESDtrack()) trStatus=track->GetStatus();
1202 Int_t innermostlayer=0;
1203 if(trStatus&AliESDtrack::kTPCin) {
1204 innermostlayer=AliITSsegmentationUpgrade::GetNLayers()-1;
1205 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
1206 for(innermostlayer=0; innermostlayer<AliITSsegmentationUpgrade::GetNLayers(); innermostlayer++) {
1207 if( (drphi < (fSegmentation->GetRadius(innermostlayer)+1.)) ||
1208 index[innermostlayer] >= 0 ) break;
1210 AliDebug(2,Form(" drphi %f innermost %d",drphi,innermostlayer));
1213 Int_t from, to, step;
1214 if (xx > track->GetX()) {
1215 from=innermostlayer; to=AliITSsegmentationUpgrade::GetNLayers();
1218 from=AliITSsegmentationUpgrade::GetNLayers()-1; to=innermostlayer-1;
1221 TString dir = (step>0 ? "outward" : "inward");
1223 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
1225 r=fSegmentation->GetRadius(ilayer);
1227 if (step<0 && xx>r){
1231 // material between SSD and SDD, SDD and SPD
1232 // Double_t hI=ilayer-0.5*step;
1233 // if (TMath::Abs(hI-3.5)<0.01) // SDDouter
1234 // if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
1235 // if (TMath::Abs(hI-1.5)<0.01) // SPDouter
1236 // if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
1239 Double_t oldGlobXYZ[3];
1241 if (!track->GetXYZ(oldGlobXYZ)) {
1244 // continue if we are already beyond this layer
1245 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1246 if(step>0 && oldGlobR > r){
1247 continue; // going outward
1249 if(step<0 && oldGlobR < r) {
1250 continue; // going inward
1253 if (!track->GetPhiZat(r,phi,z)){
1256 // only for ITS-SA tracks refit
1257 track->SetCheckInvariant(kFALSE);
1259 if (phi<0) phi+=TMath::TwoPi();//from 0 to 360 (rad)
1260 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();//
1262 phideg=180.*phi/TMath::Pi();// in deg
1263 Int_t ladder=(Int_t)(phideg/18.);// virtual segmentation
1264 Double_t alpha= (ladder*18.+9.)*TMath::Pi()/180.;
1266 if (!track->Propagate(alpha,r)) {
1270 const AliITSRecPoint *clAcc=0;
1271 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
1273 Int_t idx=index[ilayer];
1274 if (idx>=0) { // cluster in this layer
1275 Int_t cli = idx&0x0fffffff;
1276 const AliITSRecPoint *cl=(AliITSRecPoint *)fLayers[ilayer]->GetCluster(cli);
1279 Int_t cllayer = (idx & 0xf0000000) >> 28;;
1280 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
1291 if (!UpdateMI(track,clAcc,maxchi2,idx)){
1294 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
1298 // Correct for material of the current layer
1300 // add time if going outward
1301 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)){
1304 track->SetCheckInvariant(kFALSE);
1305 } // end loop on layers
1307 if (!track->PropagateTo(xx,0.,0.)){
1313 //_____________________________________________________________________
1314 Int_t AliITStrackerUpgrade::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
1319 Int_t layer = (index & 0xf0000000) >> 28;
1320 track->SetClIndex(layer, index);
1321 if (TMath::Abs(cl->GetQ())<1.e-13) return 0; // ingore the "virtual" clusters
1324 // Take into account the mis-alignment (bring track to cluster plane)
1325 Double_t xTrOrig=track->GetX();
1326 Double_t trxyz[3]; track->GetXYZ(trxyz);
1327 Float_t xclu1 = cl->GetX();//upgrade clusters tracking coordinate
1328 //Float_t yclu1 = cl->GetY();
1329 //Float_t zclu1 = cl->GetZ();
1330 if (!track->Propagate(xTrOrig+xclu1)){
1334 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
1335 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
1336 c.SetSigmaYZ(track->GetSigmaYZ(layer));
1338 // Bring the track back to detector plane in ideal geometry
1339 Int_t updated = track->UpdateMI(&c,chi2,index);
1340 if (!track->Propagate(xTrOrig)) {
1344 AliDebug(2,"update failed");
1348 //____________________________________________________________________-
1349 Int_t AliITStrackerUpgrade::CorrectForLayerMaterial(AliITStrackMI *t,
1351 Double_t oldGlobXYZ[3],
1352 TString direction) {
1353 //-------------------------------------------------------------------
1354 // Propagate beyond layer and correct for material
1355 // (material budget in different ways according to fUseTGeo value)
1356 // Add time if going outward (PropagateTo or PropagateToTGeo)
1357 //-------------------------------------------------------------------
1359 // Define budget mode:
1360 // 0: material from AliITSRecoParam (hard coded)
1361 // 1: material from TGeo in stepsof X cm (on the fly)
1362 // X = AliITSRecoParam::GetStepSizeTGeo()
1363 // 2: material from lut
1364 // 3: material from TGeo in one step (same for all hypotheses)
1377 if(fTrackingPhase.Contains("Clusters2Tracks"))
1378 { mode=3; } else { mode=1; }
1381 if(fTrackingPhase.Contains("Clusters2Tracks"))
1382 { mode=3; } else { mode=2; }
1388 if(fTrackingPhase.Contains("Default")) {
1391 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1393 r=fSegmentation->GetRadius(layerindex);
1394 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
1395 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
1397 if (!t->GetLocalXat(rToGo,xToGo)) {
1400 Int_t index=AliITSsegmentationUpgrade::GetNLayers()*fCurrentEsdTrack+layerindex;
1403 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
1405 // back before material (no correction)
1407 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1408 if (!t->GetLocalXat(rOld,xOld)) return 0;
1409 if (!t->Propagate(xOld)) return 0;
1414 xOverX0 = fSegmentation->GetThickness(layerindex)/x0;
1416 lengthTimesMeanDensity = xOverX0*x0;
1417 lengthTimesMeanDensity *= dir;
1418 // Bring the track beyond the material
1419 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1424 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1425 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
1428 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
1429 xOverX0 = fxOverX0Layer[layerindex];
1430 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
1431 lengthTimesMeanDensity *= dir;
1432 // Bring the track beyond the material
1433 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1436 if(!fxOverX0LayerTrks || index<0 || index>=AliITSsegmentationUpgrade::GetNLayers()*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
1437 if(fxOverX0LayerTrks[index]<0) {
1438 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1439 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
1440 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1441 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1442 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
1443 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1446 xOverX0 = fxOverX0LayerTrks[index];
1447 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
1448 lengthTimesMeanDensity *= dir;
1449 // Bring the track beyond the material
1450 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1461 //_____________________________________________________________________________
1462 Double_t AliITStrackerUpgrade::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
1465 // Compute predicted chi2
1467 Float_t erry,errz,covyz;
1468 Float_t theta = track->GetTgl();
1469 Float_t phi = track->GetSnp();
1470 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
1471 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz,covyz);
1472 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()));
1473 // Take into account the mis-alignment (bring track to cluster plane)
1474 Double_t xTrOrig=track->GetX();
1475 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
1476 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()));
1477 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz,covyz);
1478 // Bring the track back to detector plane in ideal geometry
1479 // [mis-alignment will be accounted for in UpdateMI()]
1480 if (!track->Propagate(xTrOrig)) return 1000.;
1481 Float_t ny=0.,nz=0.;
1482 //GetNTeor(layer,cluster,theta,phi,ny,nz);
1483 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
1485 chi2+=0.5*TMath::Min(delta/2,2.);
1486 chi2+=2.*cluster->GetDeltaProbability();
1489 track->SetNy(layer,ny);
1490 track->SetNz(layer,nz);
1491 track->SetSigmaY(layer,erry);
1492 track->SetSigmaZ(layer, errz);
1493 track->SetSigmaYZ(layer,covyz);
1494 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
1495 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
1498 //________________________________________________________________
1499 Int_t AliITStrackerUpgrade::GetError(Int_t /*layer*/,
1500 const AliITSRecPoint *cl,
1501 Float_t /*tgl*/,Float_t /*tgphitr*/,Float_t /*expQ*/,
1502 Float_t &erry,Float_t &errz,Float_t &covyz,
1503 Bool_t /*addMisalErr*/)
1506 // Calculate cluster position error for the upgrade
1510 retval = GetErrorOrigRecPoint(cl,erry,errz,covyz);
1517 //____________________________________________________________________-
1519 Int_t AliITStrackerUpgrade::GetErrorOrigRecPoint(const AliITSRecPoint*cl,
1520 Float_t &erry,Float_t &errz,Float_t &covyz)
1523 // Calculate cluster position error (just take error from AliITSRecPoint)
1525 erry = TMath::Sqrt(cl->GetSigmaY2());
1526 errz = TMath::Sqrt(cl->GetSigmaZ2());
1527 covyz = cl->GetSigmaYZ();
1530 //__________________________
1531 void AliITStrackerUpgrade::GetNTeor(Int_t layer,const AliITSRecPoint* /*cl*/,
1532 Float_t tgl,Float_t tgphitr,
1533 Float_t &ny,Float_t &nz)
1536 // Get "mean shape" (original parametrization from AliITStrackerMI)
1538 tgl = TMath::Abs(tgl);
1539 tgphitr = TMath::Abs(tgphitr);
1543 ny = 1.+tgphitr*3.2;
1548 ny = 1.+tgphitr*3.2;
1553 if (layer==4 || layer==5) {
1554 ny = 2.02+tgphitr*1.95;
1555 nz = 2.02+tgphitr*2.35;
1559 ny = 6.6-2.7*tgphitr;
1560 nz = 2.8-3.11*tgphitr+0.45*tgl;
1563 //_________________________________________________________________
1564 Int_t AliITStrackerUpgrade::PropagateBack(AliESDEvent *event) {
1565 //--------------------------------------------------------------------
1566 // This functions propagates reconstructed ITS tracks back
1567 // The clusters must be loaded !
1568 //--------------------------------------------------------------------
1569 fTrackingPhase="PropagateBack";
1570 Int_t nentr=event->GetNumberOfTracks();
1571 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
1573 for (Int_t i=0; i<nentr; i++) {
1574 AliESDtrack *esd=event->GetTrack(i);
1576 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
1577 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
1582 t=new AliITStrackMI(*esd);
1583 } catch (const Char_t *msg) {
1584 //Warning("PropagateBack",msg);
1589 AliITStrackMI *t = new AliITStrackMI(*esd);
1590 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
1592 ResetTrackToFollow(*t);
1595 // propagate to vertex [SR, GSI 17.02.2003]
1596 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
1597 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1598 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
1599 fTrackToFollow.StartTimeIntegral();
1600 // from vertex to outside pipe
1601 CorrectForPipeMaterial(&fTrackToFollow,"outward");
1603 // Start time integral and add distance from current position to vertex
1604 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
1605 fTrackToFollow.GetXYZ(xyzTrk);
1607 for (Int_t icoord=0; icoord<3; icoord++) {
1608 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
1611 fTrackToFollow.StartTimeIntegral();
1612 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
1614 fTrackToFollow.ResetCovariance(10.);
1615 fTrackToFollow.ResetClusters();
1617 Int_t inx[AliITSsegmentationUpgrade::GetNLayers()];
1618 for (Int_t k=0; k<AliITSsegmentationUpgrade::GetNLayers(); k++) inx[k]=-1;
1619 Int_t nclusters = t->GetNumberOfClusters();
1620 for(Int_t ncl=0;ncl<nclusters;ncl++){
1621 Int_t index = t-> GetClIndex(ncl);
1622 Int_t lay = (index & 0xf0000000) >> 28;
1626 if (RefitAtBase(fSegmentation->GetRadius(AliITSsegmentationUpgrade::GetNLayers()-1),&fTrackToFollow,inx)) {
1627 //fTrackToFollow.SetLabel(t->GetLabel());//
1628 //fTrackToFollow.CookdEdx();
1629 //CookLabel(&fTrackToFollow,0.); //For comparison only
1630 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
1631 //UseClusters(&fTrackToFollow);
1637 AliInfo(Form("Number of back propagated ITS tracks: %d out of %d ESD tracks",ntrk,nentr));
1639 fTrackingPhase="Default";
1643 //_________________________________________________________________________
1644 AliCluster *AliITStrackerUpgrade::GetCluster(Int_t index) const {
1645 //--------------------------------------------------------------------
1646 // Return pointer to a given cluster
1647 //--------------------------------------------------------------------
1648 Int_t l=(index & 0xf0000000) >> 28;
1649 Int_t c=(index & 0x0fffffff) >> 0;
1650 AliInfo(Form("index %i cluster index %i layer %i", index,c,l));
1651 return fLayers[l]->GetCluster(c);
1653 //______________________________________________________________________________
1654 Int_t AliITStrackerUpgrade::CorrectForPipeMaterial(AliITStrackMI *t, TString direction) {
1655 //-------------------------------------------------------------------
1656 // Propagate beyond beam pipe and correct for material
1657 // (material budget in different ways according to fUseTGeo value)
1658 // Add time if going outward (PropagateTo or PropagateToTGeo)
1659 //-------------------------------------------------------------------
1661 // Define budget mode:
1662 // 0: material from AliITSRecoParam (hard coded)
1663 // 1: material from TGeo in one step (on the fly)
1664 // 2: material from lut
1665 // 3: material from TGeo in one step (same for all hypotheses)
1678 if(fTrackingPhase.Contains("Clusters2Tracks"))
1679 { mode=3; } else { mode=1; }
1682 if(fTrackingPhase.Contains("Clusters2Tracks"))
1683 { mode=3; } else { mode=2; }
1689 if(fTrackingPhase.Contains("Default")) mode=0;
1690 Int_t index=fCurrentEsdTrack;
1692 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1693 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
1695 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
1697 Double_t xOverX0,x0,lengthTimesMeanDensity;
1701 xOverX0 = AliITSRecoParam::GetdPipe();
1702 x0 = AliITSRecoParam::GetX0Be();
1703 lengthTimesMeanDensity = xOverX0*x0;
1704 lengthTimesMeanDensity *= dir;
1705 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1708 if (!t->PropagateToTGeo(xToGo,1)) return 0;
1711 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
1712 xOverX0 = fxOverX0Pipe;
1713 lengthTimesMeanDensity = fxTimesRhoPipe;
1714 lengthTimesMeanDensity *= dir;
1715 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1718 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
1719 if(fxOverX0PipeTrks[index]<0) {
1720 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
1721 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1722 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1723 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
1724 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1727 xOverX0 = fxOverX0PipeTrks[index];
1728 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
1729 lengthTimesMeanDensity *= dir;
1730 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1736 //__________________________________________________________________________
1737 Int_t AliITStrackerUpgrade::RefitInward(AliESDEvent *event) {
1738 //--------------------------------------------------------------------
1739 // This functions refits ITS tracks using the
1740 // "inward propagated" TPC tracks
1741 // The clusters must be loaded !
1742 //--------------------------------------------------------------------
1743 fTrackingPhase="RefitInward";
1744 Int_t nentr=event->GetNumberOfTracks();
1745 for (Int_t i=0; i<nentr; i++) {
1746 AliESDtrack *esd=event->GetTrack(i);
1748 // if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
1749 // if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
1750 //if (esd->GetStatus()&AliESDtrack::kTPCout)
1751 // if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
1754 t=new AliITStrackMI(*esd);
1755 } catch (const Char_t *msg) {
1756 //Warning("RefitInward",msg);
1761 ResetTrackToFollow(*t);
1762 // fTrackToFollow.ResetClusters();
1763 // if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
1764 // fTrackToFollow.ResetCovariance(10.);
1767 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1768 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
1769 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
1770 Double_t r[3]={0.,0.,0.};
1772 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
1777 fTrackingPhase="Default";