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 "AliITStrackSA.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(),
76 // Default constructor
80 //________________________________________________________________________
81 AliITStrackerUpgrade::AliITStrackerUpgrade(const AliITStrackerUpgrade& tracker):AliITStrackerMI(),
82 fNLayer(tracker.fNLayer),
83 fPhiEstimate(tracker.fPhiEstimate),
84 fITSStandAlone(tracker.fITSStandAlone),
85 fLambdac(tracker.fLambdac),
87 fCoef1(tracker.fCoef1),
88 fCoef2(tracker.fCoef2),
89 fCoef3(tracker.fCoef3),
90 fNloop(tracker.fNloop),
91 fPhiWin(tracker.fPhiWin),
92 fLambdaWin(tracker.fLambdaWin),
94 fVertexer(tracker.fVertexer),
95 fListOfTracks(tracker.fListOfTracks),
96 fListOfSATracks(tracker.fListOfSATracks),
97 fITSclusters(tracker.fITSclusters),
98 fInwardFlag(tracker.fInwardFlag),
99 fOuterStartLayer(tracker.fOuterStartLayer),
100 fInnerStartLayer(tracker.fInnerStartLayer),
101 fMinNPoints(tracker.fMinNPoints),
102 fMinQ(tracker.fMinQ),
103 fLayers(tracker.fLayers),
104 fCluLayer(tracker.fCluLayer),
105 fCluCoord(tracker.fCluCoord) {
107 for(Int_t i=0;i<2;i++){
108 fPoint1[i]=tracker.fPoint1[i];
109 fPoint2[i]=tracker.fPoint2[i];
110 fPoint3[i]=tracker.fPoint3[i];
111 fPointc[i]=tracker.fPointc[i];
113 if(tracker.fVertexer && tracker.fVert){
114 fVert = new AliESDVertex(*tracker.fVert);
117 fVert = tracker.fVert;
119 for(Int_t i=0;i<6;i++){
120 fCluLayer[i] = tracker.fCluLayer[i];
121 fCluCoord[i] = tracker.fCluCoord[i];
124 //______________________________________________________________________
125 AliITStrackerUpgrade& AliITStrackerUpgrade::operator=(const AliITStrackerUpgrade& source){
126 // Assignment operator.
127 this->~AliITStrackerUpgrade();
128 new(this) AliITStrackerUpgrade(source);
133 //____________________________________________________________________________
134 AliITStrackerUpgrade::~AliITStrackerUpgrade(){
136 // if fVertexer is not null, the AliESDVertex obj. is owned by this class
137 // and is deleted here
139 if(fVert)delete fVert;
144 if(fPhiWin)delete []fPhiWin;
145 if(fLambdaWin)delete []fLambdaWin;
146 fListOfTracks->Delete();
147 delete fListOfTracks;
148 fListOfSATracks->Delete();
149 delete fListOfSATracks;
151 for(Int_t i=0;i<6;i++){
153 fCluLayer[i]->Delete();
160 for(Int_t i=0;i<AliITSgeomTGeo::GetNLayers();i++){
162 fCluCoord[i]->Delete();
171 //____________________________________________________________________________
172 Int_t AliITStrackerUpgrade::Clusters2Tracks(AliESDEvent *event){
173 // This method is used to find and fit the tracks. By default the corresponding
174 // method in the parent class is invoked. In this way a combined tracking
175 // TPC+ITS is performed. If the flag fITSStandAlone is true, the tracking
176 // is done in the ITS only. In the standard reconstruction chain this option
177 // can be set via AliReconstruction::SetOption("ITS","onlyITS")
180 rc=AliITStrackerMI::Clusters2Tracks(event);
183 AliDebug(1,"Stand Alone flag set: doing tracking in ITS alone\n");
186 rc=FindTracks(event,kFALSE);
187 if(AliITSReconstructor::GetRecoParam()->GetSAUseAllClusters()==kTRUE) {
188 rc=FindTracks(event,kTRUE);
193 //_________________________________________________-
194 void AliITStrackerUpgrade::Init(){
195 // Reset all data members
197 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
207 Int_t nLoops=AliITSReconstructor::GetRecoParam()->GetNLoopsSA();
209 SetFixedWindowSizes();
211 Double_t phimin=AliITSReconstructor::GetRecoParam()->GetMinPhiSA();
212 Double_t phimax=AliITSReconstructor::GetRecoParam()->GetMaxPhiSA();
213 Double_t lambmin=AliITSReconstructor::GetRecoParam()->GetMinLambdaSA();
214 Double_t lambmax=AliITSReconstructor::GetRecoParam()->GetMaxLambdaSA();
215 SetCalculatedWindowSizes(nLoops,phimin,phimax,lambmin,lambmax);
217 fMinQ=AliITSReconstructor::GetRecoParam()->GetSAMinClusterCharge();
219 SetOuterStartLayer(1);
221 fListOfTracks=new TClonesArray("AliITStrackMI",100);
222 fListOfSATracks=new TClonesArray("AliITStrackSA",100);
223 fLayers=new AliITSlayerUpgrade*[6];//to be fixed
227 AliITSsegmentationUpgrade *segmentation2 = 0x0;
229 segmentation2 = new AliITSsegmentationUpgrade();
230 for(Int_t layer=0; layer<6; layer++){
233 fLayers[layer] = new AliITSlayerUpgrade(p,zC);
238 //_______________________________________________________________________
239 Int_t AliITStrackerUpgrade::LoadClusters(TTree *clusTree){
240 TClonesArray statITSCluster("AliITSRecPoint");
241 for(Int_t layer=0; layer<6; layer++){
242 TClonesArray *ITSCluster = &statITSCluster;
243 TBranch* itsClusterBranch=clusTree->GetBranch("ITSRecPoints");
244 if (!itsClusterBranch){
245 printf("can't get the branch with the ITS clusters ! \n");
248 itsClusterBranch->SetAddress(&ITSCluster);
249 if (!clusTree->GetEvent(layer)) continue;
250 Int_t nCluster = ITSCluster->GetEntriesFast();
251 for(Int_t i=0; i<nCluster; i++){
252 AliITSRecPoint *recp = (AliITSRecPoint*)ITSCluster->UncheckedAt(i);
254 fLayers[layer]->InsertCluster(new AliITSRecPoint(*recp));
258 SetClusterTree(clusTree);
262 //_______________________________________________________
263 void AliITStrackerUpgrade::ResetForFinding(){
264 // Reset data members used in all loops during track finding
266 for(Int_t i=0;i<3;i++){fPoint1[i]=0;fPoint2[i]=0;fPoint3[i]=0;}
274 fListOfTracks->Clear();
275 fListOfSATracks->Clear();
280 //______________________________________________________________________
281 Int_t AliITStrackerUpgrade::FindTracks(AliESDEvent* event,Bool_t useAllClusters){
283 // Track finder using the ESD object
284 AliDebug(2,Form(" field is %f",event->GetMagneticField()));
285 printf(" field is %f",event->GetMagneticField());
286 AliDebug(2,Form("SKIPPING %d %d %d %d %d %d",ForceSkippingOfLayer(0),ForceSkippingOfLayer(1),ForceSkippingOfLayer(2),ForceSkippingOfLayer(3),ForceSkippingOfLayer(4),ForceSkippingOfLayer(5)));
288 Fatal("FindTracks","ITS cluster tree is not accessed - Abort!!!\n Please use method SetClusterTree to pass the pointer to the tree\n");
292 //Reads event and mark clusters of traks already found, with flag kITSin
293 Int_t nentr=event->GetNumberOfTracks();
294 if(!useAllClusters) {
296 AliESDtrack *track=event->GetTrack(nentr);
297 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
299 Int_t ncl = track->GetITSclusters(idx);
300 for(Int_t k=0;k<ncl;k++){
301 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
302 cll->SetBit(kSAflag);
308 AliESDtrack *track=event->GetTrack(nentr);
309 if ((track->GetStatus()&AliESDtrack::kITSin) == AliESDtrack::kITSin){
311 Int_t ncl = track->GetITSclusters(idx);
312 for(Int_t k=0;k<ncl;k++){
313 AliITSRecPoint* cll = (AliITSRecPoint*)GetCluster(idx[k]);
314 cll->ResetBit(kSAflag);
320 Double_t primaryVertex[3];
321 event->GetVertex()->GetXYZ(primaryVertex);
322 Int_t nclusters[/*AliITSsegmentationUpgrade::GetNLayers()*/6]={0,0,0,0,0,0};
323 Int_t dmar[/*AliITSsegmentationUpgrade::GetNLayers()*/6]={0,0,0,0,0,0};
324 if (fCluLayer == 0) {
325 fCluLayer = new TClonesArray*[6];
326 fCluCoord = new TClonesArray*[6];
327 for(Int_t i=0;i<6;i++) {
332 for(Int_t i=0;i<6;i++){
333 if (!ForceSkippingOfLayer(i)) {
334 for(Int_t cli=0;cli<fLayers[i]->GetNumberOfClusters();cli++){
335 AliITSRecPoint* cls = (AliITSRecPoint*)fLayers[i]->GetCluster(cli);
336 if(cls->TestBit(kSAflag)==kTRUE) continue; //clusters used by TPC prol.
337 if(cls->GetQ()==0) continue; //fake clusters dead zones
338 if(i>1 && cls->GetQ()<=fMinQ) continue; // cut on SDD and SSD cluster charge
344 fCluLayer[i] = new TClonesArray("AliITSRecPoint",nclusters[i]);
346 fCluLayer[i]->Delete();
347 fCluLayer[i]->Expand(nclusters[i]);
350 fCluCoord[i] = new TClonesArray("AliITSclusterTable",nclusters[i]);
352 fCluCoord[i]->Delete();
353 fCluCoord[i]->Expand(nclusters[i]);
356 for(Int_t ilay=0;ilay<AliITSgeomTGeo::GetNLayers();ilay++){
357 TClonesArray &clulay = *fCluLayer[ilay];
358 TClonesArray &clucoo = *fCluCoord[ilay];
359 if (!ForceSkippingOfLayer(ilay)){
360 for(Int_t cli=0;cli<fLayers[ilay]->GetNumberOfClusters();cli++){
361 AliITSRecPoint* cls = (AliITSRecPoint*)fLayers[ilay]->GetCluster(cli);
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);
380 static Int_t nClusLay[6];//counter for clusters on each layer
381 Int_t startLayForSeed=0;
382 Int_t lastLayForSeed=fOuterStartLayer;
383 Int_t nSeedSteps=lastLayForSeed-startLayForSeed;
387 lastLayForSeed=fInnerStartLayer;
388 nSeedSteps=startLayForSeed-lastLayForSeed;
391 // loop on minimum number of points
392 for(Int_t iMinNPoints=6; iMinNPoints>=fMinNPoints; iMinNPoints--) {
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;
398 if(fInwardFlag) minNPoints=iMinNPoints-(6-1-theLay);
399 for(Int_t i=theLay+1;i<6;i++)
400 if(ForceSkippingOfLayer(i))
402 if(minNPoints<fMinNPoints) continue;
404 // loop on phi and lambda window size
405 for(Int_t nloop=0;nloop<fNloop;nloop++){
406 Int_t nclTheLay=fCluLayer[theLay]->GetEntries();
409 Bool_t useRP=SetFirstPoint(theLay,nclTheLay,primaryVertex);
415 for(kk=0;kk<6;kk++) nClusLay[kk] = 0;
418 nClusLay[kk] = SearchClusters(theLay,fPhiWin[nloop],fLambdaWin[nloop],
419 &trs,primaryVertex[2],pflag);
420 Int_t nextLay=theLay+seedStep;
425 nClusLay[kk] = SearchClusters(nextLay,fPhiWin[nloop],fLambdaWin[nloop],
426 &trs,primaryVertex[2],pflag);
431 fPoint3[0]=fPointc[0];
432 fPoint3[1]=fPointc[1];
438 if(nextLay<0 || nextLay==6) goon=kFALSE;
444 for(Int_t nnp=0;nnp<6-theLay;nnp++){
445 if(nClusLay[nnp]!=0) layOK+=1;
448 for(Int_t nnp=theLay; nnp>=0; nnp--){
449 if(nClusLay[nnp]!=0) layOK+=1;
452 if(layOK>=minNPoints){
453 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]));
454 AliITStrackV2* tr2 = 0;
455 Bool_t onePoint = kFALSE;
456 tr2 = FitTrack(&trs,primaryVertex,onePoint);
460 AliDebug(2,Form("---NPOINTS fit: %d\n",tr2->GetNumberOfClusters()));
462 StoreTrack(tr2,event,useAllClusters);
467 }//end loop on clusters of theLay
468 } //end loop on window sizes
469 } //end loop on theLay
470 }//end loop on min points
471 if(!useAllClusters) AliInfo(Form("Number of found tracks: %d",event->GetNumberOfTracks()));
478 //________________________________________________________________________
480 AliITStrackV2* AliITStrackerUpgrade::FitTrack(AliITStrackSA* tr,Double_t *primaryVertex,Bool_t onePoint) {
483 const Int_t kMaxClu=AliITStrackSA::kMaxNumberOfClusters;
486 static Int_t clind[6][kMaxClu];
487 static Int_t clmark[6][kMaxClu];
489 static AliITSRecPoint *listlayer[6][kMaxClu];
491 for(Int_t i=0;i<6;i++) {
493 for(Int_t j=0;j<kMaxClu; j++){
500 for (Int_t k=0; k<6; k++) inx[k]=-1;
501 Int_t nclusters = tr->GetNumberOfClustersSA();
502 for(Int_t ncl=0;ncl<nclusters;ncl++){
503 Int_t index = tr->GetClusterIndexSA(ncl);
504 Int_t lay = (index & 0xf0000000) >> 28;
505 Int_t cli = index&0x0fffffff;
506 AliITSRecPoint* cl = (AliITSRecPoint*)fLayers[lay]->GetCluster(cli);
507 if(cl->TestBit(kSAflag)==kTRUE) cl->ResetBit(kSAflag);
510 Int_t nInLay=end[lay];
511 listlayer[lay][nInLay]=cl;
512 clind[lay][nInLay]=index;
516 for(Int_t nlay=0;nlay<6;nlay++){
517 for(Int_t ncl=0;ncl<tr->GetNumberOfMarked(nlay);ncl++){
518 Int_t mark = tr->GetClusterMark(nlay,ncl);
519 clmark[nlay][ncl]=mark;
524 Int_t firstLay=-1,secondLay=-1;
525 for(Int_t i=0;i<6;i++) {
531 } else if(secondLay==-1) {
537 if(firstLay==-1 || (secondLay==-1 && !onePoint)) return 0;
538 TClonesArray &arrMI= *fListOfTracks;
539 TClonesArray &arrSA= *fListOfSATracks;
540 Int_t nFoundTracks=0;
542 for(Int_t l0=0;l0<end[0];l0++){ //loop on layer 1
543 AliITSRecPoint* cl0 = (AliITSRecPoint*)listlayer[0][l0];
544 for(Int_t l1=0;l1<end[1];l1++){ //loop on layer 2
545 AliITSRecPoint* cl1 = (AliITSRecPoint*)listlayer[1][l1];
546 for(Int_t l2=0;l2<end[2];l2++){ //loop on layer 3
547 AliITSRecPoint* cl2 = (AliITSRecPoint*)listlayer[2][l2];
548 for(Int_t l3=0;l3<end[3];l3++){ //loop on layer 4
549 AliITSRecPoint* cl3 = (AliITSRecPoint*)listlayer[3][l3];
550 for(Int_t l4=0;l4<end[4];l4++){ //loop on layer 5
551 AliITSRecPoint* cl4 = (AliITSRecPoint*)listlayer[4][l4];
552 for(Int_t l5=0;l5<end[5];l5++){ //loop on layer 6
553 AliITSRecPoint* cl5 = (AliITSRecPoint*)listlayer[5][l5];
556 Double_t x1,y1,z1,sx1,sy1,sz1;
557 Double_t x2,y2,z2,sx2,sy2,sz2;
558 AliITSRecPoint* p1=0;
559 AliITSRecPoint* p2=0;
560 Int_t index1=0,index2=0;
566 index1=clind[0][l0];mrk1=clmark[0][l0];
570 index1=clind[1][l1];mrk1=clmark[1][l1];
574 index1=clind[2][l2];mrk1=clmark[2][l2];
578 index1=clind[3][l3];mrk1=clmark[3][l3];
582 index1=clind[4][l4];mrk1=clmark[4][l4];
589 index2=clind[1][l1];mrk2=clmark[1][l1];
593 index2=clind[2][l2];mrk2=clmark[2][l2];
597 index2=clind[3][l3];mrk2=clmark[3][l3];
601 index2=clind[4][l4];mrk2=clmark[4][l4];
605 index2=clind[5][l5];mrk2=clmark[5][l5];
614 Double_t radius = 0.;
615 Double_t yclu1 = p1->GetY();
616 Double_t zclu1 = p1->GetZ();
617 layer=p1->GetLayer();
618 AliITSsegmentationUpgrade *segmentation = 0x0;
620 segmentation = new AliITSsegmentationUpgrade();
621 radius=segmentation->GetRadius(layer);
622 Double_t cv=0.,tgl2=0.,phi2=0.;
624 AliITSclusterTable* arr1 = (AliITSclusterTable*)GetClusterCoord(firstLay,cln1);
634 AliITSclusterTable* arr2 = (AliITSclusterTable*)GetClusterCoord(secondLay,cln2);
641 cv = Curvature(primaryVertex[0],primaryVertex[1],x1,y1,x2,y2);
642 tgl2 = (z2-z1)/TMath::Sqrt((x2-x1)*(x2-x1)+(y2-y1)*(y2-y1));
643 phi2 = TMath::ATan2((y2-y1),(x2-x1));
647 xz[0]= p1->GetDetLocalX();
648 xz[1]= p1->GetDetLocalZ();
650 check2 = segmentation->DetToGlobal(layer,xz[0], xz[1],x,y,z);
653 Double_t phiclrad, phicldeg;
654 phiclrad=TMath::ATan2(y,x);
655 if (phiclrad<0) phiclrad+=TMath::TwoPi();
656 else if (phiclrad>=TMath::TwoPi()) phiclrad-=TMath::TwoPi();
658 phicldeg=180.*phiclrad/TMath::Pi();
659 Int_t ladder=(Int_t)(phicldeg/18.);//virtual segmentation
660 Double_t alpha= (ladder*18.+9.)*TMath::Pi()/180.;
663 AliITStrackSA trac(alpha,radius,yclu1,zclu1,phi2,tgl2,cv,1);
667 trac.AddClusterV2(5,(clind[5][l5] & 0x0fffffff)>>0);
668 trac.AddClusterMark(5,clmark[5][l5]);
671 trac.AddClusterV2(4,(clind[4][l4] & 0x0fffffff)>>0);
672 trac.AddClusterMark(4,clmark[4][l4]);
675 trac.AddClusterV2(3,(clind[3][l3] & 0x0fffffff)>>0);
676 trac.AddClusterMark(3,clmark[3][l3]);
679 trac.AddClusterV2(2,(clind[2][l2] & 0x0fffffff)>>0);
680 trac.AddClusterMark(2,clmark[2][l2]);
683 trac.AddClusterV2(1,(clind[1][l1] & 0x0fffffff)>>0);
684 trac.AddClusterMark(1,clmark[1][l1]);
687 trac.AddClusterV2(0,(clind[0][l0] & 0x0fffffff)>>0);
688 trac.AddClusterMark(0,clmark[0][l0]);
691 //fit with Kalman filter using AliITStrackerMI::RefitAtBase()
692 AliITStrackSA ot(trac);
693 ot.ResetCovariance(10.);
696 // Propagate inside the innermost layer with a cluster
697 if(ot.Propagate(ot.GetX()-0.1*ot.GetX())) {
699 rt=segmentation->GetRadius(5);
700 if(RefitAtBase(rt,&ot,inx)){ //fit from layer 1 to layer 6
701 AliITStrackMI otrack2(ot);
702 otrack2.ResetCovariance(10.);
703 otrack2.ResetClusters();
705 //fit from layer 6 to layer 1
706 if(RefitAtBase(/*AliITSRecoParam::GetrInsideSPD1()*/segmentation->GetRadius(0),&otrack2,inx)) {//check clind
707 new(arrMI[nFoundTracks]) AliITStrackMI(otrack2);
708 new(arrSA[nFoundTracks]) AliITStrackSA(trac);
724 if(fListOfTracks->GetEntries()==0) return 0;
726 Int_t lowchi2 = FindTrackLowChiSquare();
727 AliITStrackV2* otrack =(AliITStrackV2*)fListOfTracks->At(lowchi2);
728 AliITStrackSA* trsa = (AliITStrackSA*)fListOfSATracks->At(lowchi2);
734 for(Int_t i=0;i<6;i++) indexc[i]=0;
735 for(Int_t nind=0;nind<otrack->GetNumberOfClusters();nind++){
736 indexc[nind] = otrack->GetClusterIndex(nind);
739 //remove clusters of found track
740 for(Int_t nlay=0;nlay<6;nlay++){
741 for(Int_t cln=0;cln<trsa->GetNumberOfMarked(nlay);cln++){
742 Int_t index = trsa->GetClusterMark(nlay,cln);
743 fCluLayer[nlay]->RemoveAt(index);
744 RemoveClusterCoord(nlay,index);
745 fCluLayer[nlay]->Compress();
752 //_______________________________________________________
753 void AliITStrackerUpgrade::StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) /*const*/
756 // Add new track to the ESD
758 AliESDtrack outtrack;
759 outtrack.UpdateTrackParams(t,AliESDtrack::kITSin);
760 if(pureSA) outtrack.SetStatus(AliESDtrack::kITSpureSA);
761 outtrack.SetStatus(AliESDtrack::kITSout);
762 outtrack.SetStatus(AliESDtrack::kITSrefit);
763 Double_t sdedx[4]={0.,0.,0.,0.};
764 for(Int_t i=0; i<4; i++) sdedx[i]=t->GetSampledEdx(i);
765 outtrack.SetITSdEdxSamples(sdedx);
766 event->AddTrack(&outtrack);
771 //_______________________________________________________
772 Int_t AliITStrackerUpgrade::SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, AliITStrackSA* trs,Double_t /*zvertex*/,Int_t pflag){
773 //function used to to find the clusters associated to the track
775 AliITSsegmentationUpgrade *segmentation = 0x0;
777 segmentation = new AliITSsegmentationUpgrade();
779 if(ForceSkippingOfLayer(layer)) return 0;
782 Double_t r=segmentation->GetRadius(layer);
784 Float_t cx1,cx2,cy1,cy2;
785 FindEquation(fPoint1[0],fPoint1[1],fPoint2[0],fPoint2[1],fPoint3[0],fPoint3[1],fCoef1,fCoef2,fCoef3);
786 if (FindIntersection(fCoef1,fCoef2,fCoef3,-r*r,cx1,cy1,cx2,cy2)==0)
788 Double_t fi1=TMath::ATan2(cy1-fPoint1[1],cx1-fPoint1[0]);
789 Double_t fi2=TMath::ATan2(cy2-fPoint1[1],cx2-fPoint1[0]);
790 fPhiEstimate=ChoosePoint(fi1,fi2,fPhic);
794 Int_t ncl = fCluLayer[layer]->GetEntries();
795 for (Int_t index=0; index<ncl; index++) {
796 AliITSRecPoint *c = (AliITSRecPoint*)fCluLayer[layer]->At(index);
798 if (c->GetQ()<=0) continue;
799 if(layer>1 && c->GetQ()<=fMinQ) continue;
801 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(layer,index);
808 if (TMath::Abs(phi-fPhiEstimate)>phiwindow)
813 Double_t lambda = arr->GetLambda();
814 if (TMath::Abs(lambda-fLambdac)>lambdawindow) continue;
816 if(trs->GetNumberOfClustersSA()==trs->GetMaxNumberOfClusters()) return 0;
817 if(trs->GetNumberOfMarked(layer)==trs->GetMaxNMarkedPerLayer()) return 0;
818 Int_t orind = arr->GetOrInd();
819 trs->AddClusterSA(layer,orind);
820 trs->AddClusterMark(layer,index);
826 fPointc[0]=arr->GetX();
827 fPointc[1]=arr->GetY();
832 //________________________________________________________________
833 Bool_t AliITStrackerUpgrade::SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex){
834 // Sets the first point (seed) for tracking
836 AliITSRecPoint* cl = (AliITSRecPoint*)fCluLayer[lay]->At(clu);
837 if(!cl) return kFALSE;
838 if (cl->GetQ()<=0) return kFALSE;
839 if(lay>1 && cl->GetQ()<=fMinQ) return kFALSE;
840 AliITSclusterTable* arr = (AliITSclusterTable*)GetClusterCoord(lay,clu);
841 fPhic = arr->GetPhi();
842 fLambdac = arr->GetLambda();
843 fPhiEstimate = fPhic;
844 fPoint1[0]=primaryVertex[0];
845 fPoint1[1]=primaryVertex[1];
846 fPoint2[0]=arr->GetX();
847 fPoint2[1]=arr->GetY();
851 //________________________________________________________________
852 void AliITStrackerUpgrade::UpdatePoints(){
853 //update of points for the estimation of the curvature
855 fPoint2[0]=fPoint3[0];
856 fPoint2[1]=fPoint3[1];
857 fPoint3[0]=fPointc[0];
858 fPoint3[1]=fPointc[1];
863 //___________________________________________________________________
864 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){
866 //given (x,y) of three recpoints (in global coordinates)
867 //returns the parameters a,b,c of circonference x*x + y*y +a*x + b*y +c
869 Float_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
871 a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
872 b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
873 c = -x1*x1-y1*y1-a*x1-b*y1;
876 //__________________________________________________________________________
877 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){
879 //Finds the intersection between the circonference of the track and the circonference centered in (0,0) represented by one layer
880 //c2 is -rlayer*rlayer
884 Double_t aA = (b1*b1)/(a1*a1)+1;
885 Double_t bB = (-2*m*b1/(a1*a1));
886 Double_t cC = c2+(m*m)/(a1*a1);
887 Double_t dD = bB*bB-4*aA*cC;
890 y1 = (-bB+TMath::Sqrt(dD))/(2*aA);
891 y2 = (-bB-TMath::Sqrt(dD))/(2*aA);
892 x1 = (c2-c1-b1*y1)/a1;
893 x2 = (c2-c1-b1*y2)/a1;
897 //____________________________________________________________________
898 Double_t AliITStrackerUpgrade::Curvature(Double_t x1,Double_t y1,Double_t
899 x2,Double_t y2,Double_t x3,Double_t y3){
901 //calculates the curvature of track
902 Double_t den = (x3-x1)*(y2-y1)-(x2-x1)*(y3-y1);
904 Double_t a = ((y3-y1)*(x2*x2+y2*y2-x1*x1-y1*y1)-(y2-y1)*(x3*x3+y3*y3-x1*x1-y1*y1))/den;
905 Double_t b = -(x2*x2-x1*x1+y2*y2-y1*y1+a*(x2-x1))/(y2-y1);
906 Double_t c = -x1*x1-y1*y1-a*x1-b*y1;
909 if((a*a+b*b-4*c)<0) return 0;
910 Double_t rad = TMath::Sqrt(a*a+b*b-4*c)/2.;
913 if((x1>0 && y1>0 && x1<xc)) rad*=-1;
914 if((x1<0 && y1>0 && x1<xc)) rad*=-1;
915 // if((x1<0 && y1<0 && x1<xc)) rad*=-1;
916 // if((x1>0 && y1<0 && x1<xc)) rad*=-1;
923 //____________________________________________________________________
924 Double_t AliITStrackerUpgrade::ChoosePoint(Double_t p1, Double_t p2, Double_t pp){
926 //Returns the point closest to pp
928 Double_t diff1 = p1-pp;
929 Double_t diff2 = p2-pp;
931 if(TMath::Abs(diff1)<TMath::Abs(diff2)) fPhiEstimate=p1;
932 else fPhiEstimate=p2;
938 //_________________________________________________________________
939 Int_t AliITStrackerUpgrade::FindTrackLowChiSquare() const {
940 // returns track with lowest chi square
941 Int_t dim=fListOfTracks->GetEntries();
943 AliITStrackV2* trk = (AliITStrackV2*)fListOfTracks->At(0);
944 Double_t minChi2=trk->GetChi2();
946 for(Int_t i=1;i<dim;i++){
947 trk = (AliITStrackV2*)fListOfTracks->At(i);
948 Double_t chi2=trk->GetChi2();
957 //__________________________________________________________
958 /*Int_t AliITStrackerUpgrade::FindLabel(Int_t l0, Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5){
960 //function used to determine the track label
962 Int_t lb[6] = {l0,l1,l2,l3,l4,l5};
963 Int_t aa[6]={1,1,1,1,1,1};
966 Int_t k=0;Int_t w=0;Int_t num=6;
967 for(Int_t i=5;i>=0;i--) if(lb[i]==-1) num=i;
971 for(Int_t i=k+1;i<num;i++){
973 if(lb[k]==lb[i] && aa[k]!=0){
984 for(Int_t j=0;j<6;j++){
1001 //_____________________________________________________________________________
1002 /*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,
1003 Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, Int_t gl17, Int_t gl18, Int_t minNPoints){
1006 //function used to assign label to the found track. If track is fake, the label is negative
1008 Int_t lb0[6] = {gl1,gl2,gl3,gl4,gl5,gl6};
1009 Int_t lb1[6] = {gl7,gl8,gl9,gl10,gl11,gl12};
1010 Int_t lb2[6] = {gl13,gl14,gl15,gl16,gl17,gl18};
1011 Int_t ll=FindLabel(lb0[0],lb0[1],lb0[2],lb0[3],lb0[4],lb0[5]);
1012 Int_t lflag=0;Int_t num=6;
1013 if(lb0[5]==-1 && lb1[5]==-1 && lb2[5]==-1) num=5;
1015 for(Int_t i=0;i<num;i++){
1016 if(lb0[i]==ll || lb1[i]==ll || lb2[i]==ll) lflag+=1;
1019 if(lflag>=minNPoints) return ll;
1025 //_____________________________________________________________________________
1026 void AliITStrackerUpgrade::SetCalculatedWindowSizes(Int_t n, Float_t phimin, Float_t phimax, Float_t lambdamin, Float_t lambdamax){
1027 // Set sizes of the phi and lambda windows used for track finding
1029 if(fPhiWin) delete [] fPhiWin;
1030 if(fLambdaWin) delete [] fLambdaWin;
1031 fPhiWin = new Double_t[fNloop];
1032 fLambdaWin = new Double_t[fNloop];
1033 Float_t stepPhi=(phimax-phimin)/(Float_t)(fNloop-1);
1034 Float_t stepLambda=(lambdamax-lambdamin)/(Float_t)(fNloop-1);
1035 for(Int_t k=0;k<fNloop;k++){
1036 Float_t phi=phimin+k*stepPhi;
1037 Float_t lam=lambdamin+k*stepLambda;
1042 //_____________________________________________________________________________
1043 void AliITStrackerUpgrade::SetFixedWindowSizes(Int_t n, Double_t *phi, Double_t *lam){
1044 // Set sizes of the phi and lambda windows used for track finding
1046 if(phi){ // user defined values
1047 fPhiWin = new Double_t[fNloop];
1048 fLambdaWin = new Double_t[fNloop];
1049 for(Int_t k=0;k<fNloop;k++){
1051 fLambdaWin[k]=lam[k];
1054 else { // default values
1056 Double_t phid[33] = {0.002,0.003,0.004,0.0045,0.0047,
1057 0.005,0.0053,0.0055,
1058 0.006,0.0063,0.0065,0.007,0.0073,0.0075,0.0077,
1059 0.008,0.0083,0.0085,0.0087,0.009,0.0095,0.0097,
1060 0.01,0.0105,0.011,0.0115,0.012,0.0125,0.013,0.0135,0.0140,0.0145};
1061 Double_t lambdad[33] = {0.003,0.004,0.005,0.005,0.005,
1063 0.006,0.006,0.006,0.007,0.007,0.007,0.007,
1064 0.007,0.007,0.007,0.007,0.007,0.007,0.007,
1065 0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008,0.008};
1072 fPhiWin = new Double_t[fNloop];
1073 fLambdaWin = new Double_t[fNloop];
1075 Double_t factor=AliITSReconstructor::GetRecoParam()->GetFactorSAWindowSizes();
1077 for(Int_t k=0;k<fNloop;k++){
1078 fPhiWin[k]=phid[k]*factor;
1079 fLambdaWin[k]=lambdad[k]*factor;
1085 //_______________________________________________________________________
1086 void AliITStrackerUpgrade::GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda, Double_t &x, Double_t &y,Double_t &z,Double_t* vertex){
1087 //Returns values of phi (azimuthal) and lambda angles for a given cluster
1089 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1090 Int_t lay,lad,det; fGeom->GetModuleId(module,lay,lad,det);
1091 Float_t tx,ty,tz; fGeom->GetTrans(lay,lad,det,tx,ty,tz);
1093 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1094 Double_t phi1=TMath::Pi()/2+alpha;
1095 if (lay==1) phi1+=TMath::Pi();
1097 Float_t cp=TMath::Cos(phi1), sp=TMath::Sin(phi1);
1098 Float_t r=tx*cp+ty*sp;
1100 xyz= r*cp - cl->GetY()*sp;
1101 y= r*sp + cl->GetY()*cp;
1106 xz[0]= cl->GetDetLocalX();
1107 xz[1]= cl->GetDetLocalZ() ;
1108 AliITSsegmentationUpgrade *segmentation2 = 0x0;
1110 segmentation2 = new AliITSsegmentationUpgrade();
1113 ilayer = cl->GetLayer();
1114 check2 = segmentation2->DetToGlobal(ilayer,xz[0], xz[1],x,y,z);
1117 phi=TMath::ATan2(y-vertex[1],x-vertex[0]);
1118 lambda=TMath::ATan2(z-vertex[2],TMath::Sqrt((x-vertex[0])*(x-vertex[0])+(y-vertex[1])*(y-vertex[1])));
1121 //________________________________________________________________________
1122 void AliITStrackerUpgrade::GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz){
1124 //returns sigmax, y, z of cluster in global coordinates
1126 Double_t rot[9]; fGeom->GetRotMatrix(module,rot);
1128 AliITSgeomTGeo::GetModuleId(module,lay,lad,det);
1130 Double_t alpha=TMath::ATan2(rot[1],rot[0])+TMath::Pi();
1131 Double_t phi=TMath::Pi()/2+alpha;
1132 if (lay==1) phi+=TMath::Pi();
1134 Float_t cp=TMath::Cos(phi), sp=TMath::Sin(phi);
1137 cl->GetGlobalCov(covm);
1138 sx=TMath::Sqrt(covm[0]);
1139 sy=TMath::Sqrt(covm[3]);
1140 sz=TMath::Sqrt(covm[5]);
1145 // cl->GetGlobalCov(covm);
1146 // sx=12*1e-04;//TMath::Sqrt(covm[0]);
1147 // sy=12*1e-04;//TMath::Sqrt(covm[3]);
1148 // sz=40*1e-04;//TMath::Sqrt(covm[5]);
1150 sx = TMath::Sqrt(sp*sp*cl->GetSigmaY2());
1151 sy = TMath::Sqrt(cp*cp*cl->GetSigmaY2());
1152 sz = TMath::Sqrt(cl->GetSigmaZ2());
1155 //_____________________________________________________________
1156 void AliITStrackerUpgrade::UnloadClusters() {
1157 //--------------------------------------------------------------------
1158 //This function unloads ITS clusters
1159 //--------------------------------------------------------------------
1160 for (Int_t i=0; i<6; i++) fLayers[i]->ResetClusters();
1162 //______________________________________________________________________
1163 Bool_t AliITStrackerUpgrade::RefitAtBase(Double_t xx,AliITStrackMI *track,
1164 const Int_t *clusters)
1166 //--------------------------------------------------------------------
1167 // Simplified version for ITS upgrade studies -- does not use module info
1168 //--------------------------------------------------------------------
1169 Int_t index[AliITSgeomTGeo::kNLayers];
1171 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) index[k]=-1;
1173 for (k=0; k<AliITSgeomTGeo::GetNLayers(); k++) {
1174 index[k]=clusters[k];
1176 AliITSsegmentationUpgrade *segmentation = 0x0;
1178 segmentation = new AliITSsegmentationUpgrade();
1181 if(track->GetESDtrack()) trStatus=track->GetStatus();
1182 Int_t innermostlayer=0;
1183 if(trStatus&AliESDtrack::kTPCin) {
1185 Double_t drphi = TMath::Abs(track->GetD(0.,0.));
1186 for(innermostlayer=0; innermostlayer<AliITSgeomTGeo::GetNLayers(); innermostlayer++) {
1187 if( (drphi < (segmentation->GetRadius(innermostlayer)+1.)) ||
1188 index[innermostlayer] >= 0 ) break;
1190 AliDebug(2,Form(" drphi %f innermost %d",drphi,innermostlayer));
1193 Int_t from, to, step;
1194 if (xx > track->GetX()) {
1195 from=innermostlayer; to=6;
1198 from=AliITSgeomTGeo::GetNLayers()-1; to=innermostlayer-1;
1201 TString dir = (step>0 ? "outward" : "inward");
1203 for (Int_t ilayer = from; ilayer != to; ilayer += step) {
1205 r=segmentation->GetRadius(ilayer);
1207 if (step<0 && xx>r){
1211 // material between SSD and SDD, SDD and SPD
1212 // Double_t hI=ilayer-0.5*step;
1213 // if (TMath::Abs(hI-3.5)<0.01) // SDDouter
1214 // if(!CorrectForShieldMaterial(track,"SDD",dir)) return kFALSE;
1215 // if (TMath::Abs(hI-1.5)<0.01) // SPDouter
1216 // if(!CorrectForShieldMaterial(track,"SPD",dir)) return kFALSE;
1219 Double_t oldGlobXYZ[3];
1221 if (!track->GetXYZ(oldGlobXYZ)) {
1224 // continue if we are already beyond this layer
1225 Double_t oldGlobR = TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1226 if(step>0 && oldGlobR > r){
1227 continue; // going outward
1229 if(step<0 && oldGlobR < r) {
1230 continue; // going inward
1233 if (!track->GetPhiZat(r,phi,z)){
1236 // only for ITS-SA tracks refit
1237 track->SetCheckInvariant(kFALSE);
1239 if (phi<0) phi+=TMath::TwoPi();//from 0 to 360 (rad)
1240 else if (phi>=TMath::TwoPi()) phi-=TMath::TwoPi();//
1242 phideg=180.*phi/TMath::Pi();// in deg
1243 Int_t ladder=(Int_t)(phideg/18.);// virtual segmentation
1244 Double_t alpha= (ladder*18.+9.)*TMath::Pi()/180.;
1246 if (!track->Propagate(alpha,r)) {
1251 const AliITSRecPoint *clAcc=0;
1252 Double_t maxchi2=1000.*AliITSReconstructor::GetRecoParam()->GetMaxChi2();
1254 Int_t idx=index[ilayer];
1255 if (idx>=0) { // cluster in this layer
1256 Int_t cli = idx&0x0fffffff;
1257 const AliITSRecPoint *cl=(AliITSRecPoint *)fLayers[ilayer]->GetCluster(cli);
1260 Int_t cllayer = (idx & 0xf0000000) >> 28;;
1261 Double_t chi2=GetPredictedChi2MI(track,cl,cllayer);
1272 if (!UpdateMI(track,clAcc,maxchi2,idx)){
1275 track->SetSampledEdx(clAcc->GetQ(),ilayer-2);
1279 // Correct for material of the current layer
1281 // add time if going outward
1282 if(!CorrectForLayerMaterial(track,ilayer,oldGlobXYZ,dir)){
1285 track->SetCheckInvariant(kFALSE);
1286 } // end loop on layers
1288 if (!track->PropagateTo(xx,0.,0.)){
1294 //_____________________________________________________________________
1295 Int_t AliITStrackerUpgrade::UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t index) const
1300 Int_t layer = (index & 0xf0000000) >> 28;
1301 track->SetClIndex(layer, index);
1302 if (TMath::Abs(cl->GetQ())<1.e-13) return 0; // ingore the "virtual" clusters
1305 // Take into account the mis-alignment (bring track to cluster plane)
1306 Double_t xTrOrig=track->GetX();
1307 Double_t trxyz[3]; track->GetXYZ(trxyz);
1308 Float_t xclu1 = cl->GetX();//upgrade clusters tracking coordinate
1309 //Float_t yclu1 = cl->GetY();
1310 //Float_t zclu1 = cl->GetZ();
1311 if (!track->Propagate(xTrOrig+xclu1)){
1315 c.SetSigmaY2(track->GetSigmaY(layer)*track->GetSigmaY(layer));
1316 c.SetSigmaZ2(track->GetSigmaZ(layer)*track->GetSigmaZ(layer));
1317 c.SetSigmaYZ(track->GetSigmaYZ(layer));
1319 // Bring the track back to detector plane in ideal geometry
1320 Int_t updated = track->UpdateMI(&c,chi2,index);
1321 if (!track->Propagate(xTrOrig)) {
1325 AliDebug(2,"update failed");
1329 //____________________________________________________________________-
1330 Int_t AliITStrackerUpgrade::CorrectForLayerMaterial(AliITStrackMI *t,
1332 Double_t oldGlobXYZ[3],
1333 TString direction) {
1334 //-------------------------------------------------------------------
1335 // Propagate beyond layer and correct for material
1336 // (material budget in different ways according to fUseTGeo value)
1337 // Add time if going outward (PropagateTo or PropagateToTGeo)
1338 //-------------------------------------------------------------------
1340 // Define budget mode:
1341 // 0: material from AliITSRecoParam (hard coded)
1342 // 1: material from TGeo in stepsof X cm (on the fly)
1343 // X = AliITSRecoParam::GetStepSizeTGeo()
1344 // 2: material from lut
1345 // 3: material from TGeo in one step (same for all hypotheses)
1358 if(fTrackingPhase.Contains("Clusters2Tracks"))
1359 { mode=3; } else { mode=1; }
1362 if(fTrackingPhase.Contains("Clusters2Tracks"))
1363 { mode=3; } else { mode=2; }
1369 if(fTrackingPhase.Contains("Default")) {
1372 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1374 AliITSsegmentationUpgrade *segmentation = 0x0;
1376 segmentation = new AliITSsegmentationUpgrade();
1377 r=segmentation->GetRadius(layerindex);
1378 Double_t deltar=(layerindex<2 ? 0.10*r : 0.05*r);
1379 Double_t rToGo=TMath::Sqrt(t->GetX()*t->GetX()+t->GetY()*t->GetY())-deltar*dir;
1381 if (!t->GetLocalXat(rToGo,xToGo)) {
1384 Int_t index=6*fCurrentEsdTrack+layerindex;
1387 Double_t xOverX0=0.0,x0=0.0,lengthTimesMeanDensity=0.0;
1389 // back before material (no correction)
1391 rOld=TMath::Sqrt(oldGlobXYZ[0]*oldGlobXYZ[0]+oldGlobXYZ[1]*oldGlobXYZ[1]);
1392 if (!t->GetLocalXat(rOld,xOld)) return 0;
1393 if (!t->Propagate(xOld)) return 0;
1398 xOverX0 = segmentation->GetThickness(layerindex)/x0;
1400 lengthTimesMeanDensity = xOverX0*x0;
1401 lengthTimesMeanDensity *= dir;
1402 // Bring the track beyond the material
1403 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1408 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1409 if (!t->PropagateToTGeo(xToGo,nsteps)) return 0; // cross the material and apply correction
1412 if(fxOverX0Layer[layerindex]<0) BuildMaterialLUT("Layers");
1413 xOverX0 = fxOverX0Layer[layerindex];
1414 lengthTimesMeanDensity = fxTimesRhoLayer[layerindex];
1415 lengthTimesMeanDensity *= dir;
1416 // Bring the track beyond the material
1417 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1420 if(!fxOverX0LayerTrks || index<0 || index>=6*fNtracks) Error("CorrectForLayerMaterial","Incorrect usage of UseTGeo option!\n");
1421 if(fxOverX0LayerTrks[index]<0) {
1422 nsteps = (Int_t)(TMath::Abs(xOld-xToGo)/AliITSReconstructor::GetRecoParam()->GetStepSizeTGeo())+1;
1423 if (!t->PropagateToTGeo(xToGo,nsteps,xOverX0,lengthTimesMeanDensity)) return 0;
1424 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1425 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1426 fxOverX0LayerTrks[index] = TMath::Abs(xOverX0)/angle;
1427 fxTimesRhoLayerTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1430 xOverX0 = fxOverX0LayerTrks[index];
1431 lengthTimesMeanDensity = fxTimesRhoLayerTrks[index];
1432 lengthTimesMeanDensity *= dir;
1433 // Bring the track beyond the material
1434 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)){
1445 //_____________________________________________________________________________
1446 Double_t AliITStrackerUpgrade::GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer)
1449 // Compute predicted chi2
1451 Float_t erry,errz,covyz;
1452 Float_t theta = track->GetTgl();
1453 Float_t phi = track->GetSnp();
1454 phi = TMath::Abs(phi)*TMath::Sqrt(1./((1.-phi)*(1.+phi)));
1455 GetError(layer,cluster,theta,phi,track->GetExpQ(),erry,errz,covyz);
1456 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()));
1457 // Take into account the mis-alignment (bring track to cluster plane)
1458 Double_t xTrOrig=track->GetX();
1459 if (!track->Propagate(xTrOrig+cluster->GetX())) return 1000.;
1460 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()));
1461 Double_t chi2 = track->GetPredictedChi2MI(cluster->GetY(),cluster->GetZ(),erry,errz,covyz);
1462 // Bring the track back to detector plane in ideal geometry
1463 // [mis-alignment will be accounted for in UpdateMI()]
1464 if (!track->Propagate(xTrOrig)) return 1000.;
1465 Float_t ny=0.,nz=0.;
1466 //GetNTeor(layer,cluster,theta,phi,ny,nz);
1467 Double_t delta = cluster->GetNy()+cluster->GetNz()-nz-ny;
1469 chi2+=0.5*TMath::Min(delta/2,2.);
1470 chi2+=2.*cluster->GetDeltaProbability();
1473 track->SetNy(layer,ny);
1474 track->SetNz(layer,nz);
1475 track->SetSigmaY(layer,erry);
1476 track->SetSigmaZ(layer, errz);
1477 track->SetSigmaYZ(layer,covyz);
1478 //track->fNormQ[layer] = cluster->GetQ()/TMath::Sqrt(1+theta*theta+phi*phi);
1479 track->SetNormQ(layer,cluster->GetQ()/TMath::Sqrt((1.+ track->GetTgl()*track->GetTgl())/((1.-track->GetSnp())*(1.+track->GetSnp()))));
1482 //________________________________________________________________
1483 Int_t AliITStrackerUpgrade::GetError(Int_t /*layer*/,
1484 const AliITSRecPoint *cl,
1485 Float_t /*tgl*/,Float_t /*tgphitr*/,Float_t /*expQ*/,
1486 Float_t &erry,Float_t &errz,Float_t &covyz,
1487 Bool_t /*addMisalErr*/)
1490 // Calculate cluster position error for the upgrade
1494 retval = GetErrorOrigRecPoint(cl,erry,errz,covyz);
1501 //____________________________________________________________________-
1503 Int_t AliITStrackerUpgrade::GetErrorOrigRecPoint(const AliITSRecPoint*cl,
1504 Float_t &erry,Float_t &errz,Float_t &covyz)
1507 // Calculate cluster position error (just take error from AliITSRecPoint)
1509 erry = TMath::Sqrt(cl->GetSigmaY2());
1510 errz = TMath::Sqrt(cl->GetSigmaZ2());
1511 covyz = cl->GetSigmaYZ();
1514 //__________________________
1515 void AliITStrackerUpgrade::GetNTeor(Int_t layer,const AliITSRecPoint* /*cl*/,
1516 Float_t tgl,Float_t tgphitr,
1517 Float_t &ny,Float_t &nz)
1520 // Get "mean shape" (original parametrization from AliITStrackerMI)
1522 tgl = TMath::Abs(tgl);
1523 tgphitr = TMath::Abs(tgphitr);
1527 ny = 1.+tgphitr*3.2;
1532 ny = 1.+tgphitr*3.2;
1537 if (layer==4 || layer==5) {
1538 ny = 2.02+tgphitr*1.95;
1539 nz = 2.02+tgphitr*2.35;
1543 ny = 6.6-2.7*tgphitr;
1544 nz = 2.8-3.11*tgphitr+0.45*tgl;
1547 //_________________________________________________________________
1548 Int_t AliITStrackerUpgrade::PropagateBack(AliESDEvent *event) {
1549 //--------------------------------------------------------------------
1550 // This functions propagates reconstructed ITS tracks back
1551 // The clusters must be loaded !
1552 //--------------------------------------------------------------------
1553 fTrackingPhase="PropagateBack";
1554 Int_t nentr=event->GetNumberOfTracks();
1555 Info("PropagateBack", "Number of ESD tracks: %d\n", nentr);
1557 for (Int_t i=0; i<nentr; i++) {
1558 AliESDtrack *esd=event->GetTrack(i);
1560 if ((esd->GetStatus()&AliESDtrack::kITSin)==0) continue;
1561 if (esd->GetStatus()&AliESDtrack::kITSout) continue;
1565 t=new AliITStrackMI(*esd);
1566 } catch (const Char_t *msg) {
1567 //Warning("PropagateBack",msg);
1571 t->SetExpQ(TMath::Max(0.8*t->GetESDtrack()->GetTPCsignal(),30.));
1573 ResetTrackToFollow(*t);
1576 // propagate to vertex [SR, GSI 17.02.2003]
1577 // Start Time measurement [SR, GSI 17.02.2003], corrected by I.Belikov
1578 if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1579 if (fTrackToFollow.PropagateToVertex(event->GetVertex()))
1580 fTrackToFollow.StartTimeIntegral();
1581 // from vertex to outside pipe
1582 CorrectForPipeMaterial(&fTrackToFollow,"outward");
1584 // Start time integral and add distance from current position to vertex
1585 Double_t xyzTrk[3],xyzVtx[3]={GetX(),GetY(),GetZ()};
1586 fTrackToFollow.GetXYZ(xyzTrk);
1588 for (Int_t icoord=0; icoord<3; icoord++) {
1589 Double_t di = xyzTrk[icoord] - xyzVtx[icoord];
1592 fTrackToFollow.StartTimeIntegral();
1593 fTrackToFollow.AddTimeStep(TMath::Sqrt(dst2));
1595 fTrackToFollow.ResetCovariance(10.);
1596 fTrackToFollow.ResetClusters();
1599 for (Int_t k=0; k<6; k++) inx[k]=-1;
1600 Int_t nclusters = t->GetNumberOfClusters();
1601 for(Int_t ncl=0;ncl<nclusters;ncl++){
1602 Int_t index = t-> GetClIndex(ncl);
1603 Int_t lay = (index & 0xf0000000) >> 28;
1607 if (RefitAtBase(43.6,&fTrackToFollow,inx)) {
1608 //fTrackToFollow.SetLabel(t->GetLabel());//
1609 //fTrackToFollow.CookdEdx();
1610 //CookLabel(&fTrackToFollow,0.); //For comparison only
1611 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSout);
1612 UseClusters(&fTrackToFollow);
1618 AliInfo(Form("Number of back propagated ITS tracks: %d out of %d ESD tracks",ntrk,nentr));
1620 fTrackingPhase="Default";
1624 //_________________________________________________________________________
1625 AliCluster *AliITStrackerUpgrade::GetCluster(Int_t index) const {
1626 //--------------------------------------------------------------------
1627 // Return pointer to a given cluster
1628 //--------------------------------------------------------------------
1629 Int_t l=(index & 0xf0000000) >> 28;
1630 AliInfo(Form("index %i cluster index %i layer %i", index,index & 0x0fffffff,index & 0xf0000000));
1631 return fLayers[l]->GetCluster(index);
1633 //______________________________________________________________________________
1634 Int_t AliITStrackerUpgrade::CorrectForPipeMaterial(AliITStrackMI *t, TString direction) {
1635 //-------------------------------------------------------------------
1636 // Propagate beyond beam pipe and correct for material
1637 // (material budget in different ways according to fUseTGeo value)
1638 // Add time if going outward (PropagateTo or PropagateToTGeo)
1639 //-------------------------------------------------------------------
1641 // Define budget mode:
1642 // 0: material from AliITSRecoParam (hard coded)
1643 // 1: material from TGeo in one step (on the fly)
1644 // 2: material from lut
1645 // 3: material from TGeo in one step (same for all hypotheses)
1658 if(fTrackingPhase.Contains("Clusters2Tracks"))
1659 { mode=3; } else { mode=1; }
1662 if(fTrackingPhase.Contains("Clusters2Tracks"))
1663 { mode=3; } else { mode=2; }
1669 if(fTrackingPhase.Contains("Default")) mode=0;
1670 Int_t index=fCurrentEsdTrack;
1672 Float_t dir = (direction.Contains("inward") ? 1. : -1.);
1673 Double_t rToGo=(dir>0 ? AliITSRecoParam::GetrInsidePipe() : AliITSRecoParam::GetrOutsidePipe());
1675 if (!t->GetLocalXat(rToGo,xToGo)) return 0;
1677 Double_t xOverX0,x0,lengthTimesMeanDensity;
1681 xOverX0 = AliITSRecoParam::GetdPipe();
1682 x0 = AliITSRecoParam::GetX0Be();
1683 lengthTimesMeanDensity = xOverX0*x0;
1684 lengthTimesMeanDensity *= dir;
1685 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1688 if (!t->PropagateToTGeo(xToGo,1)) return 0;
1691 if(fxOverX0Pipe<0) BuildMaterialLUT("Pipe");
1692 xOverX0 = fxOverX0Pipe;
1693 lengthTimesMeanDensity = fxTimesRhoPipe;
1694 lengthTimesMeanDensity *= dir;
1695 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1698 if(!fxOverX0PipeTrks || index<0 || index>=fNtracks) Error("CorrectForPipeMaterial","Incorrect usage of UseTGeo option!\n");
1699 if(fxOverX0PipeTrks[index]<0) {
1700 if (!t->PropagateToTGeo(xToGo,1,xOverX0,lengthTimesMeanDensity)) return 0;
1701 Double_t angle=TMath::Sqrt((1.+t->GetTgl()*t->GetTgl())/
1702 ((1.-t->GetSnp())*(1.+t->GetSnp())));
1703 fxOverX0PipeTrks[index] = TMath::Abs(xOverX0)/angle;
1704 fxTimesRhoPipeTrks[index] = TMath::Abs(lengthTimesMeanDensity)/angle;
1707 xOverX0 = fxOverX0PipeTrks[index];
1708 lengthTimesMeanDensity = fxTimesRhoPipeTrks[index];
1709 lengthTimesMeanDensity *= dir;
1710 if (!t->PropagateTo(xToGo,xOverX0,lengthTimesMeanDensity/xOverX0)) return 0;
1716 //__________________________________________________________________________
1717 Int_t AliITStrackerUpgrade::RefitInward(AliESDEvent *event) {
1718 //--------------------------------------------------------------------
1719 // This functions refits ITS tracks using the
1720 // "inward propagated" TPC tracks
1721 // The clusters must be loaded !
1722 //--------------------------------------------------------------------
1723 fTrackingPhase="RefitInward";
1724 Int_t nentr=event->GetNumberOfTracks();
1725 for (Int_t i=0; i<nentr; i++) {
1726 AliESDtrack *esd=event->GetTrack(i);
1728 // if ((esd->GetStatus()&AliESDtrack::kITSout) == 0) continue;
1729 // if (esd->GetStatus()&AliESDtrack::kITSrefit) continue;
1730 //if (esd->GetStatus()&AliESDtrack::kTPCout)
1731 // if ((esd->GetStatus()&AliESDtrack::kTPCrefit)==0) continue;
1734 t=new AliITStrackMI(*esd);
1735 } catch (const Char_t *msg) {
1736 //Warning("RefitInward",msg);
1741 ResetTrackToFollow(*t);
1742 // fTrackToFollow.ResetClusters();
1743 // if ((esd->GetStatus()&AliESDtrack::kTPCin)==0)
1744 // fTrackToFollow.ResetCovariance(10.);
1747 // if (CorrectForPipeMaterial(&fTrackToFollow,"inward")) {
1748 fTrackToFollow.UpdateESDtrack(AliESDtrack::kITSrefit);
1749 AliESDtrack *esdTrack =fTrackToFollow.GetESDtrack();
1750 Double_t r[3]={0.,0.,0.};
1752 esdTrack->RelateToVertex(event->GetVertex(),GetBz(r),maxD);
1757 fTrackingPhase="Default";