1 /**************************************************************************
2 * Copyright(c) 1998-1999, 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 ///////////////////////////////////////////////////////////////////////////////
20 // The standard TRD tracker //
22 ///////////////////////////////////////////////////////////////////////////////
24 #include <Riostream.h>
28 #include <TObjArray.h>
30 #include "AliTRDgeometry.h"
31 #include "AliTRDparameter.h"
32 #include "AliTRDpadPlane.h"
33 #include "AliTRDgeometryFull.h"
34 #include "AliTRDcluster.h"
35 #include "AliTRDtrack.h"
38 #include "AliTRDcalibDB.h"
39 #include "AliTRDCommonParam.h"
41 #include "TTreeStream.h"
43 #include "AliTRDtracker.h"
44 #include "TLinearFitter.h"
45 #include "AliRieman.h"
46 #include "AliTrackPointArray.h"
47 #include "AliAlignObj.h"
51 ClassImp(AliTRDtracker)
56 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
57 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
58 const Double_t AliTRDtracker::fgkMaxChi2 = 12.;
59 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // correspond to tan = 3
60 const Double_t AliTRDtracker::fgkMaxStep = 2.; // maximal step size in propagation
68 //____________________________________________________________________
69 AliTRDtracker::AliTRDtracker():AliTracker(),
81 // Default constructor
83 for(Int_t i=0;i<kTrackingSectors;i++) fTrSec[i]=0;
84 for(Int_t j=0;j<5;j++)
85 for(Int_t k=0;k<18;k++) fHoles[j][k]=kFALSE;
88 //____________________________________________________________________
89 AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker()
95 fAddTRDseeds = kFALSE;
99 TDirectory *savedir=gDirectory;
100 TFile *in=(TFile*)geomfile;
102 printf("AliTRDtracker::AliTRDtracker(): geometry file is not open!\n");
103 printf(" FULL TRD geometry and DEFAULT TRD parameter will be used\n");
107 fGeom = (AliTRDgeometry*) in->Get("TRDgeometry");
111 // printf("Found geometry version %d on file \n", fGeom->IsVersion());
114 printf("AliTRDtracker::AliTRDtracker(): can't find TRD geometry!\n");
115 fGeom = new AliTRDgeometryFull();
116 fGeom->SetPHOShole();
117 fGeom->SetRICHhole();
124 fClusters = new TObjArray(2000);
126 fSeeds = new TObjArray(2000);
128 fTracks = new TObjArray(1000);
130 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
131 Int_t trS = CookSectorIndex(geomS);
132 fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS);
133 for (Int_t icham=0;icham<AliTRDgeometry::kNcham; icham++){
134 fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS);
137 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
138 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
139 if(tiltAngle < 0.1) {
143 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
145 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
150 //___________________________________________________________________
151 AliTRDtracker::~AliTRDtracker()
154 // Destructor of AliTRDtracker
171 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
172 delete fTrSec[geomS];
174 if (fDebugStreamer) {
175 //fDebugStreamer->Close();
176 delete fDebugStreamer;
180 //_____________________________________________________________________
183 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid){
185 // transform internal TRD ID to global detector ID
187 Int_t isector = fGeom->GetSector(lid);
188 Int_t ichamber= fGeom->GetChamber(lid);
189 Int_t iplan = fGeom->GetPlane(lid);
191 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
194 iLayer = AliAlignObj::kTRD1;
197 iLayer = AliAlignObj::kTRD2;
200 iLayer = AliAlignObj::kTRD3;
203 iLayer = AliAlignObj::kTRD4;
206 iLayer = AliAlignObj::kTRD5;
209 iLayer = AliAlignObj::kTRD6;
212 Int_t modId = isector*fGeom->Ncham()+ichamber;
213 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
217 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid){
219 // transform global detector ID to local detector ID
222 AliAlignObj::ELayerID layerId = AliAlignObj::VolUIDToLayer(gid, modId);
223 Int_t isector = modId/fGeom->Ncham();
224 Int_t ichamber = modId%fGeom->Ncham();
227 case AliAlignObj::kTRD1:
230 case AliAlignObj::kTRD2:
233 case AliAlignObj::kTRD3:
236 case AliAlignObj::kTRD4:
239 case AliAlignObj::kTRD5:
242 case AliAlignObj::kTRD6:
248 if (iLayer<0) return -1;
249 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
254 Bool_t AliTRDtracker::Transform(AliTRDcluster * cluster){
257 const Double_t kDriftCorrection = 1.01; // drift coeficient correction
258 const Double_t kExBcor = 0.001; // ExB coef correction
259 const Double_t kTime0Cor = 0.32; // time0 correction
261 // apply alignment and calibration to transform cluster
264 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
265 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
267 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
268 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
269 cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
273 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
274 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
276 cluster->SetY(cluster->GetY() - driftX*(exB+ kExBcor));
280 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track) {
282 // Rotates the track when necessary
285 Double_t alpha = AliTRDgeometry::GetAlpha();
286 Double_t y = track->GetY();
287 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
289 //Int_t ns = AliTRDgeometry::kNsect;
290 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
294 if (!track->Rotate(alpha)) return kFALSE;
295 } else if (y <-ymax) {
297 if (!track->Rotate(-alpha)) return kFALSE;
304 AliTRDcluster * AliTRDtracker::GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin, UInt_t &index){
306 //try to find cluster in the backup list
308 AliTRDcluster * cl =0;
309 UInt_t *indexes = track->GetBackupIndexes();
310 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
311 if (indexes[i]==0) break;
312 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
314 if (cli->GetLocalTimeBin()!=timebin) continue;
315 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
326 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * track){
328 //return last updated plane
330 UInt_t *indexes = track->GetBackupIndexes();
331 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
332 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
334 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
335 if (iplane>lastplane) {
341 //___________________________________________________________________
342 Int_t AliTRDtracker::Clusters2Tracks(AliESD* event)
345 // Finds tracks within the TRD. The ESD event is expected to contain seeds
346 // at the outer part of the TRD. The seeds
347 // are found within the TRD if fAddTRDseeds is TRUE.
348 // The tracks are propagated to the innermost time bin
349 // of the TRD and the ESD event is updated
352 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
353 Float_t foundMin = fgkMinClustersInTrack * timeBins;
356 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
358 Int_t n = event->GetNumberOfTracks();
359 for (Int_t i=0; i<n; i++) {
360 AliESDtrack* seed=event->GetTrack(i);
361 ULong_t status=seed->GetStatus();
362 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
363 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
366 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
367 //seed2->ResetCovariance();
368 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
370 FollowProlongation(t, innerTB);
371 if (t.GetNumberOfClusters() >= foundMin) {
373 CookLabel(pt, 1-fgkLabelFraction);
377 // cout<<found<<'\r';
380 if (PropagateToX(t,xTPC,fgkMaxStep)) {
381 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
387 cout<<"Number of loaded seeds: "<<nseed<<endl;
388 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
390 // after tracks from loaded seeds are found and the corresponding
391 // clusters are used, look for additional seeds from TRD
394 cout<<"Total number of found tracks: "<<found<<endl;
401 //_____________________________________________________________________________
402 Int_t AliTRDtracker::PropagateBack(AliESD* event) {
404 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
405 // backpropagated by the TPC tracker. Each seed is first propagated
406 // to the TRD, and then its prolongation is searched in the TRD.
407 // If sufficiently long continuation of the track is found in the TRD
408 // the track is updated, otherwise it's stored as originaly defined
409 // by the TPC tracker.
413 Float_t foundMin = 20;
414 Int_t n = event->GetNumberOfTracks();
417 Float_t *quality =new Float_t[n];
418 Int_t *index =new Int_t[n];
419 for (Int_t i=0; i<n; i++) {
420 AliESDtrack* seed=event->GetTrack(i);
421 Double_t covariance[15];
422 seed->GetExternalCovariance(covariance);
423 quality[i] = covariance[0]+covariance[2];
425 TMath::Sort(n,quality,index,kFALSE);
427 for (Int_t i=0; i<n; i++) {
428 // AliESDtrack* seed=event->GetTrack(i);
429 AliESDtrack* seed=event->GetTrack(index[i]);
431 ULong_t status=seed->GetStatus();
432 if ( (status & AliESDtrack::kTPCout ) == 0 ) continue;
433 if ( (status & AliESDtrack::kTRDout) != 0 ) continue;
435 Int_t lbl = seed->GetLabel();
436 AliTRDtrack *track = new AliTRDtrack(*seed);
437 track->SetSeedLabel(lbl);
438 seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup); //make backup
440 Float_t p4 = track->GetC();
442 Int_t expectedClr = FollowBackProlongation(*track);
444 // only debug purpose
445 if (track->GetNumberOfClusters()<expectedClr/3){
446 AliTRDtrack *track1 = new AliTRDtrack(*seed);
447 track1->SetSeedLabel(lbl);
448 FollowBackProlongation(*track1);
449 AliTRDtrack *track2= new AliTRDtrack(*seed);
450 track->SetSeedLabel(lbl);
451 FollowBackProlongation(*track2);
456 if (TMath::Abs(track->GetC()-p4)/TMath::Abs(p4)<0.2 || TMath::Abs(track->GetPt())>0.8 ) {
458 //make backup for back propagation
460 Int_t foundClr = track->GetNumberOfClusters();
461 if (foundClr >= foundMin) {
463 CookdEdxTimBin(*track);
464 CookLabel(track, 1-fgkLabelFraction);
465 if (track->GetBackupTrack()) UseClusters(track->GetBackupTrack());
466 if(track->GetChi2()/track->GetNumberOfClusters()<4) { // sign only gold tracks
467 if (seed->GetKinkIndex(0)==0&&TMath::Abs(track->GetPt())<1.5 ) UseClusters(track);
469 Bool_t isGold = kFALSE;
471 if (track->GetChi2()/track->GetNumberOfClusters()<5) { //full gold track
472 // seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
473 if (track->GetBackupTrack()) seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
476 if (!isGold && track->GetNCross()==0&&track->GetChi2()/track->GetNumberOfClusters()<7){ //almost gold track
477 // seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
478 if (track->GetBackupTrack()) seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
481 if (!isGold && track->GetBackupTrack()){
482 if (track->GetBackupTrack()->GetNumberOfClusters()>foundMin&&
483 (track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1))<7){
484 seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
488 if (track->StatusForTOF()>0 &&track->fNCross==0 && Float_t(track->fN)/Float_t(track->fNExpected)>0.4){
489 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
493 // Debug part of tracking
494 TTreeSRedirector& cstream = *fDebugStreamer;
495 Int_t eventNr = event->GetEventNumber();
496 if (track->GetBackupTrack()){
498 "EventNr="<<eventNr<<
501 "trdback.="<<track->GetBackupTrack()<<
505 "EventNr="<<eventNr<<
512 //Propagation to the TOF (I.Belikov)
513 if (track->GetStop()==kFALSE){
516 Double_t c2=track->GetC()*xtof - track->GetEta();
517 if (TMath::Abs(c2)>=0.99) {
521 Double_t xTOF0 = 370. ;
522 PropagateToX(*track,xTOF0,fgkMaxStep);
524 //energy losses taken to the account - check one more time
525 c2=track->GetC()*xtof - track->GetEta();
526 if (TMath::Abs(c2)>=0.99) {
532 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
533 Double_t y=track->GetYat(xtof);
535 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
539 } else if (y <-ymax) {
540 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
546 if (track->PropagateTo(xtof)) {
547 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
548 for (Int_t i=0;i<kNPlane;i++) {
549 seed->SetTRDsignals(track->GetPIDsignals(i),i);
550 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
552 // seed->SetTRDtrack(new AliTRDtrack(*track));
553 if (track->GetNumberOfClusters()>foundMin) found++;
556 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
557 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
558 //seed->SetStatus(AliESDtrack::kTRDStop);
559 for (Int_t i=0;i<kNPlane;i++) {
560 seed->SetTRDsignals(track->GetPIDsignals(i),i);
561 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
563 //seed->SetTRDtrack(new AliTRDtrack(*track));
567 seed->SetTRDQuality(track->StatusForTOF());
568 seed->SetTRDBudget(track->fBudget[0]);
572 //End of propagation to the TOF
573 //if (foundClr>foundMin)
574 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
579 cerr<<"Number of seeds: "<<fNseeds<<endl;
580 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
582 // MakeSeedsMI(3,5,event); //new seeding
585 fSeeds->Clear(); fNseeds=0;
593 //_____________________________________________________________________________
594 Int_t AliTRDtracker::RefitInward(AliESD* event)
597 // Refits tracks within the TRD. The ESD event is expected to contain seeds
598 // at the outer part of the TRD.
599 // The tracks are propagated to the innermost time bin
600 // of the TRD and the ESD event is updated
601 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
604 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
605 Float_t foundMin = fgkMinClustersInTrack * timeBins;
608 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
611 Int_t n = event->GetNumberOfTracks();
612 for (Int_t i=0; i<n; i++) {
613 AliESDtrack* seed=event->GetTrack(i);
614 new(&seed2) AliTRDtrack(*seed);
615 if (seed2.GetX()<270){
616 seed->UpdateTrackParams(&seed2, AliESDtrack::kTRDbackup); // backup TPC track - only update
620 ULong_t status=seed->GetStatus();
621 if ( (status & AliESDtrack::kTRDout ) == 0 ) {
624 if ( (status & AliESDtrack::kTRDin) != 0 ) {
628 // if (1/seed2.Get1Pt()>1.5&& seed2.GetX()>260.) {
629 // Double_t oldx = seed2.GetX();
630 // seed2.PropagateTo(500.);
631 // seed2.ResetCovariance(1.);
632 // seed2.PropagateTo(oldx);
635 // seed2.ResetCovariance(5.);
638 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
639 UInt_t * indexes2 = seed2.GetIndexes();
640 for (Int_t i=0;i<kNPlane;i++) {
641 pt->SetPIDsignals(seed2.GetPIDsignals(i),i);
642 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
645 UInt_t * indexes3 = pt->GetBackupIndexes();
646 for (Int_t i=0;i<200;i++) {
647 if (indexes2[i]==0) break;
648 indexes3[i] = indexes2[i];
650 //AliTRDtrack *pt = seed2;
652 FollowProlongation(t, innerTB);
653 if (t.GetNumberOfClusters() >= foundMin) {
655 //CookLabel(pt, 1-fgkLabelFraction);
660 // cout<<found<<'\r';
662 if(PropagateToX(t,xTPC,fgkMaxStep)) {
663 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
664 for (Int_t i=0;i<kNPlane;i++) {
665 seed->SetTRDsignals(pt->GetPIDsignals(i),i);
666 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
669 //if not prolongation to TPC - propagate without update
670 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
671 seed2->ResetCovariance(5.);
672 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
674 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
675 //pt2->CookdEdx(0.,1.);
676 pt2->CookdEdx( ); // Modification by PS
677 CookdEdxTimBin(*pt2);
678 seed->UpdateTrackParams(pt2, AliESDtrack::kTRDrefit);
679 for (Int_t i=0;i<kNPlane;i++) {
680 seed->SetTRDsignals(pt2->GetPIDsignals(i),i);
681 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
689 cout<<"Number of loaded seeds: "<<nseed<<endl;
690 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
699 //---------------------------------------------------------------------------
700 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
702 // Starting from current position on track=t this function tries
703 // to extrapolate the track up to timeBin=0 and to confirm prolongation
704 // if a close cluster is found. Returns the number of clusters
705 // expected to be found in sensitive layers
706 // GeoManager used to estimate mean density
708 Int_t lastplane = GetLastPlane(&t);
709 Double_t radLength = 0.0;
712 Int_t expectedNumberOfClusters = 0;
715 Double_t alpha=AliTRDgeometry::GetAlpha();
716 Double_t tanmax = TMath::Tan(0.5*alpha);
718 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
721 Int_t currentplane = fTrSec[0]->GetLayer(nr)->GetPlane();
722 Double_t currentx = fTrSec[0]->GetLayer(nr)->GetX();
723 if (currentx < -fgkMaxStep +t.GetX()){
724 //propagate closer to chamber - safety space fgkMaxStep
725 if (!PropagateToX(t, currentx+fgkMaxStep, fgkMaxStep)) break;
727 if (!AdjustSector(&t)) break;
728 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
729 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
732 // propagate and update track in active layers
734 Int_t nr0 = nr; //first active layer
735 if (nr >rf && (fTrSec[0]->GetLayer(nr)->IsSensitive())){
737 // get all time bins at given plane
739 while (nr >rf && ((fTrSec[0]->GetLayer(nr)->IsSensitive())) && fTrSec[0]->GetLayer(nr)->GetPlane() == currentplane){
740 x = fTrSec[0]->GetLayer(nr)->GetX();
742 if (!t.GetProlongation(x,y,z)) break;
743 if (TMath::Abs(y)>x*tanmax){
749 x = fTrSec[0]->GetLayer(nr)->GetX();
750 if (!t.GetProlongation(x,y,z)) break;
751 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
752 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
754 // end global position
755 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
757 radLength = param[1]; // get mean propagation parameters
760 // propagate and update
761 if (nr0-nr< fTimeBinsPerPlane/2 ){
762 // short tracklet - do not update - edge effect
765 sector = t.GetSector();
768 for (Int_t ilayer=nr0;ilayer>=nr;ilayer--) {
769 expectedNumberOfClusters++;
771 if (t.fX>345) t.fNExpectedLast++;
772 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(ilayer));
775 Double_t maxChi2=fgkMaxChi2;
776 //dx = (fTrSec[sector]->GetLayer(ilayer+1))->GetX()-timeBin.GetX();
778 // t.PropagateTo(x,radLength,rho);
780 AliTRDcluster * cl0 = timeBin[0];
781 if (!cl0) continue; // no clusters in given time bin
782 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
783 if (plane>lastplane) continue;
784 Int_t timebin = cl0->GetLocalTimeBin();
785 AliTRDcluster * cl2= GetCluster(&t,plane, timebin,index);
789 Double_t h01 = GetTiltFactor(cl);
790 maxChi2=t.GetPredictedChi2(cl,h01);
794 // if (cl->GetNPads()<5)
795 Double_t dxsample = timeBin.GetdX();
796 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
797 Double_t h01 = GetTiltFactor(cl);
798 Int_t det = cl->GetDetector();
799 Int_t plane = fGeom->GetPlane(det);
802 t.fChi2Last+=maxChi2;
804 Double_t xcluster = cl->GetX();
805 t.PropagateTo(xcluster,radLength,rho);
806 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
807 if(!t.Update(cl,maxChi2,index,h01)) {
814 return expectedNumberOfClusters;
822 //___________________________________________________________________
823 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
826 // Starting from current radial position of track <t> this function
827 // extrapolates the track up to outer timebin and in the sensitive
828 // layers confirms prolongation if a close cluster is found.
829 // Returns the number of clusters expected to be found in sensitive layers
830 // Use GEO manager for material Description
833 Int_t clusters[1000];
834 for (Int_t i=0;i<1000;i++) clusters[i]=-1;
835 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
836 Double_t radLength = 0.0;
839 Int_t expectedNumberOfClusters = 0;
842 Double_t alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
843 Double_t tanmax = TMath::Tan(0.5*alpha);
846 AliTRDtracklet tracklet;
850 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB; nr++) {
852 // propagate to current X
854 Int_t currentplane = fTrSec[0]->GetLayer(nr)->GetPlane();
855 Double_t currentx = fTrSec[0]->GetLayer(nr)->GetX();
856 if (currentx > fgkMaxStep +t.GetX()){
857 //propagate closter to chamber
858 if (!PropagateToX(t, currentx-fgkMaxStep, fgkMaxStep)) break;
860 if (!AdjustSector(&t)) break;
861 if (TMath::Abs(t.GetSnp())>fgkMaxSnp) break;
862 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
863 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
868 if (nr <outerTB && (fTrSec[0]->GetLayer(nr)->IsSensitive())){
870 // get all time bins at given plane
872 while (nr <outerTB && fTrSec[0]->GetLayer(nr)->GetPlane() == currentplane){
873 x = fTrSec[0]->GetLayer(nr)->GetX();
875 if (!t.GetProlongation(x,y,z)) break;
876 if (TMath::Abs(y)>(x*tanmax)){
885 x = fTrSec[0]->GetLayer(nr)->GetX();
886 if (!t.GetProlongation(x,y,z)) break;
887 // minimal mean and maximal budget scan
888 Float_t minbudget =10000;
889 Float_t meanbudget =0;
890 Float_t maxbudget =-1;
891 // Float_t normbudget =0;
892 // for (Int_t idy=-1;idy<=1;idy++)
893 // for (Int_t idz=-1;idz<=1;idz++){
894 for (Int_t idy=0;idy<1;idy++)
895 for (Int_t idz=0;idz<1;idz++){
896 Double_t y2 = y+idy*TMath::Min(TMath::Sqrt(t.GetSigmaY2()),1.);
897 Double_t z2 = z+idz*TMath::Min(TMath::Sqrt(t.GetSigmaZ2()),1.);
899 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y2*TMath::Sin(t.GetAlpha());
900 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y2*TMath::Cos(t.GetAlpha());
902 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
903 Float_t budget = param[0]*param[4];
905 if (budget<minbudget) minbudget=budget;
906 if (budget>maxbudget) maxbudget=budget;
908 t.fBudget[0]+=minbudget;
909 t.fBudget[1]+=meanbudget/9.;
910 t.fBudget[2]+=minbudget;
912 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
913 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
915 // end global position
916 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
918 radLength = param[1]; // get mean propagation parameters
923 if (nr-nr0< fTimeBinsPerPlane/2){
924 // short tracklet - do not update - edge effect
929 sector = t.GetSector();
930 Float_t ncl = FindClusters(sector,nr0,nr,&t,clusters,tracklet);
931 if (tracklet.GetN()-2*tracklet.GetNCross()<10) continue;
934 for (Int_t ilayer=nr0;ilayer<=nr;ilayer++) {
935 expectedNumberOfClusters++;
937 if (t.fX>345) t.fNExpectedLast++;
938 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(ilayer));
941 Double_t maxChi2=fgkMaxChi2;
945 if (clusters[ilayer]>0) {
946 index = clusters[ilayer];
947 cl = (AliTRDcluster*)GetCluster(index);
948 Double_t h01 = GetTiltFactor(cl);
949 maxChi2=t.GetPredictedChi2(cl,h01);
953 // if (cl->GetNPads()<5)
954 Double_t dxsample = timeBin.GetdX();
955 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
956 Double_t h01 = GetTiltFactor(cl);
957 Int_t det = cl->GetDetector();
958 Int_t plane = fGeom->GetPlane(det);
961 t.fChi2Last+=maxChi2;
963 Double_t xcluster = cl->GetX();
964 t.PropagateTo(xcluster,radLength,rho);
965 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
966 if(!t.Update(cl,maxChi2,index,h01)) {
971 // if (cl->GetLocalTimeBin()==1&&t.fN>20 && float(t.fChi2)/float(t.fN)<5){
972 // Float_t ratio1 = Float_t(t.fN)/Float_t(t.fNExpected);
973 // if (tracklet.GetChi2()<18&&ratio0>0.8&&ratio1>0.6 &&ratio0+ratio1>1.5 && t.GetNCross()==0 && TMath::Abs(t.GetSnp())<0.85){
974 // t.MakeBackupTrack(); // make backup of the track until is gold
977 // reset material budget if 2 consecutive gold
979 if (t.fTracklets[plane].GetN()+t.fTracklets[plane-1].GetN()>20){
985 ratio0 = ncl/Float_t(fTimeBinsPerPlane);
986 Float_t ratio1 = Float_t(t.fN+1)/Float_t(t.fNExpected+1.);
987 if (tracklet.GetChi2()<18.&&ratio0>0.8 && ratio1>0.6 && ratio0+ratio1>1.5 && t.GetNCross()==0 && TMath::Abs(t.GetSnp())<0.85&&t.fN>20){
988 t.MakeBackupTrack(); // make backup of the track until is gold
997 return expectedNumberOfClusters;
1005 Int_t AliTRDtracker::PropagateToX(AliTRDtrack& t, Double_t xToGo, Double_t maxStep)
1007 // Starting from current radial position of track <t> this function
1008 // extrapolates the track up to radial position <xToGo>.
1009 // Returns 1 if track reaches the plane, and 0 otherwise
1010 const Double_t kEpsilon = 0.00001;
1011 // Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1012 Double_t xpos = t.GetX();
1013 Double_t dir = (xpos<xToGo) ? 1.:-1.;
1015 while ( (xToGo-xpos)*dir > kEpsilon){
1016 Double_t step = dir*TMath::Min(TMath::Abs(xToGo-xpos), maxStep);
1018 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
1019 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
1022 if (!t.GetProlongation(x,y,z)) return 0; // no prolongation
1024 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
1025 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
1028 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1029 if (!t.PropagateTo(x,param[1],param[0])) return 0;
1039 //_____________________________________________________________________________
1040 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1042 // Fills clusters into TRD tracking_sectors
1043 // Note that the numbering scheme for the TRD tracking_sectors
1044 // differs from that of TRD sectors
1045 cout<<"\n Read Sectors clusters"<<endl;
1046 if (ReadClusters(fClusters,cTree)) {
1047 Error("LoadClusters","Problem with reading the clusters !");
1050 Int_t ncl=fClusters->GetEntriesFast();
1052 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1055 for (Int_t ichamber=0;ichamber<5;ichamber++)
1056 for (Int_t isector=0;isector<18;isector++){
1057 fHoles[ichamber][isector]=kTRUE;
1062 // printf("\r %d left ",ncl);
1063 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
1064 Int_t detector=c->GetDetector();
1065 Int_t localTimeBin=c->GetLocalTimeBin();
1066 Int_t sector=fGeom->GetSector(detector);
1067 Int_t plane=fGeom->GetPlane(detector);
1069 Int_t trackingSector = CookSectorIndex(sector);
1070 if (c->GetLabel(0)>0){
1071 Int_t chamber = fGeom->GetChamber(detector);
1072 fHoles[chamber][trackingSector]=kFALSE;
1075 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1076 if(gtb < 0) continue;
1077 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1081 // apply pos correction
1083 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1088 //_____________________________________________________________________________
1089 void AliTRDtracker::UnloadClusters()
1092 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1097 nentr = fClusters->GetEntriesFast();
1098 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1101 nentr = fSeeds->GetEntriesFast();
1102 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1104 nentr = fTracks->GetEntriesFast();
1105 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1107 Int_t nsec = AliTRDgeometry::kNsect;
1109 for (i = 0; i < nsec; i++) {
1110 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1111 fTrSec[i]->GetLayer(pl)->Clear();
1117 //__________________________________________________________________________
1118 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD * esd)
1121 // Creates seeds using clusters between position inner plane and outer plane
1123 const Double_t maxtheta = 1;
1124 const Double_t maxphi = 2.0;
1126 const Double_t kRoad0y = 6; // road for middle cluster
1127 const Double_t kRoad0z = 8.5; // road for middle cluster
1129 const Double_t kRoad1y = 2; // road in y for seeded cluster
1130 const Double_t kRoad1z = 20; // road in z for seeded cluster
1132 const Double_t kRoad2y = 3; // road in y for extrapolated cluster
1133 const Double_t kRoad2z = 20; // road in z for extrapolated cluster
1134 const Int_t maxseed = 3000;
1135 Int_t maxSec=AliTRDgeometry::kNsect;
1138 // linear fitters in planes
1139 TLinearFitter fitterTC(2,"hyp2"); // fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1140 TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed
1141 fitterTC.StoreData(kTRUE);
1142 fitterT2.StoreData(kTRUE);
1143 AliRieman rieman(1000); // rieman fitter
1144 AliRieman rieman2(1000); // rieman fitter
1146 // find the maximal and minimal layer for the planes
1149 AliTRDpropagationLayer* reflayers[6];
1150 for (Int_t i=0;i<6;i++){layers[i][0]=10000; layers[i][1]=0;}
1151 for (Int_t ns=0;ns<maxSec;ns++){
1152 for (Int_t ilayer=0;ilayer<fTrSec[ns]->GetNumberOfLayers();ilayer++){
1153 AliTRDpropagationLayer& layer=*(fTrSec[ns]->GetLayer(ilayer));
1154 if (layer==0) continue;
1155 Int_t det = layer[0]->GetDetector();
1156 Int_t plane = fGeom->GetPlane(det);
1157 if (ilayer<layers[plane][0]) layers[plane][0] = ilayer;
1158 if (ilayer>layers[plane][1]) layers[plane][1] = ilayer;
1162 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1163 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1164 Double_t hL[6]; // tilting angle
1165 Double_t xcl[6]; // x - position of reference cluster
1166 Double_t ycl[6]; // y - position of reference cluster
1167 Double_t zcl[6]; // z - position of reference cluster
1168 AliTRDcluster *cl[6]={0,0,0,0,0,0}; // seeding clusters
1169 Float_t padlength[6]={10,10,10,10,10,10}; //current pad-length
1170 Double_t chi2R =0, chi2Z=0;
1171 Double_t chi2RF =0, chi2ZF=0;
1173 Int_t nclusters; // total number of clusters
1174 for (Int_t i=0;i<6;i++) {hL[i]=h01; if (i%2==1) hL[i]*=-1.;}
1178 AliTRDseed *pseed = new AliTRDseed[maxseed*6];
1179 AliTRDseed *seed[maxseed];
1180 for (Int_t iseed=0;iseed<maxseed;iseed++) seed[iseed]= &pseed[iseed*6];
1181 AliTRDseed *cseed = seed[0];
1183 Double_t seedquality[maxseed];
1184 Double_t seedquality2[maxseed];
1185 Double_t seedparams[maxseed][7];
1186 Int_t seedlayer[maxseed];
1187 Int_t registered =0;
1188 Int_t sort[maxseed];
1192 for (Int_t ns = 0; ns<maxSec; ns++){ //loop over sectors
1193 //for (Int_t ns = 0; ns<5; ns++){ //loop over sectors
1194 registered = 0; // reset registerd seed counter
1195 cseed = seed[registered];
1197 for (Int_t sLayer=2; sLayer>=0;sLayer--){
1198 //for (Int_t dseed=5;dseed<15; dseed+=3){ //loop over central seeding time bins
1200 Int_t dseed = 5+Int_t(iter)*3;
1201 // Initialize seeding layers
1202 for (Int_t ilayer=0;ilayer<6;ilayer++){
1203 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1204 xcl[ilayer] = reflayers[ilayer]->GetX();
1207 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2])*0.5;
1208 AliTRDpropagationLayer& layer0=*reflayers[sLayer+0];
1209 AliTRDpropagationLayer& layer1=*reflayers[sLayer+1];
1210 AliTRDpropagationLayer& layer2=*reflayers[sLayer+2];
1211 AliTRDpropagationLayer& layer3=*reflayers[sLayer+3];
1213 Int_t maxn3 = layer3;
1214 for (Int_t icl3=0;icl3<maxn3;icl3++){
1215 AliTRDcluster *cl3 = layer3[icl3];
1217 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2()*12.);
1218 ycl[sLayer+3] = cl3->GetY();
1219 zcl[sLayer+3] = cl3->GetZ();
1220 Float_t yymin0 = ycl[sLayer+3] - 1- maxphi *(xcl[sLayer+3]-xcl[sLayer+0]);
1221 Float_t yymax0 = ycl[sLayer+3] + 1+ maxphi *(xcl[sLayer+3]-xcl[sLayer+0]);
1222 Int_t maxn0 = layer0; //
1223 for (Int_t icl0=layer0.Find(yymin0);icl0<maxn0;icl0++){
1224 AliTRDcluster *cl0 = layer0[icl0];
1226 if (cl3->IsUsed()&&cl0->IsUsed()) continue;
1227 ycl[sLayer+0] = cl0->GetY();
1228 zcl[sLayer+0] = cl0->GetZ();
1229 if ( ycl[sLayer+0]>yymax0) break;
1230 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]);
1231 if (TMath::Abs(tanphi)>maxphi) continue;
1232 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]);
1233 if (TMath::Abs(tantheta)>maxtheta) continue;
1234 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2()*12.);
1236 // expected position in 1 layer
1237 Double_t y1exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+1]-xcl[sLayer+0]);
1238 Double_t z1exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+1]-xcl[sLayer+0]);
1239 Float_t yymin1 = y1exp - kRoad0y-tanphi;
1240 Float_t yymax1 = y1exp + kRoad0y+tanphi;
1241 Int_t maxn1 = layer1; //
1243 for (Int_t icl1=layer1.Find(yymin1);icl1<maxn1;icl1++){
1244 AliTRDcluster *cl1 = layer1[icl1];
1247 if (cl3->IsUsed()) nusedCl++;
1248 if (cl0->IsUsed()) nusedCl++;
1249 if (cl1->IsUsed()) nusedCl++;
1250 if (nusedCl>1) continue;
1251 ycl[sLayer+1] = cl1->GetY();
1252 zcl[sLayer+1] = cl1->GetZ();
1253 if ( ycl[sLayer+1]>yymax1) break;
1254 if (TMath::Abs(ycl[sLayer+1]-y1exp)>kRoad0y+tanphi) continue;
1255 if (TMath::Abs(zcl[sLayer+1]-z1exp)>kRoad0z) continue;
1256 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2()*12.);
1258 Double_t y2exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+2]-xcl[sLayer+0])+(ycl[sLayer+1]-y1exp);
1259 Double_t z2exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+2]-xcl[sLayer+0]);
1260 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y, kRoad1z);
1261 if (index2<=0) continue;
1262 AliTRDcluster *cl2 = (AliTRDcluster*)GetCluster(index2);
1263 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2()*12.);
1264 ycl[sLayer+2] = cl2->GetY();
1265 zcl[sLayer+2] = cl2->GetZ();
1266 if (TMath::Abs(cl2->GetZ()-z2exp)>kRoad0z) continue;
1269 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1270 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1271 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1272 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1276 for (Int_t iLayer=0;iLayer<6;iLayer++){
1277 cseed[iLayer].Reset();
1279 chi2Z =0.; chi2R=0.;
1280 for (Int_t iLayer=0;iLayer<4;iLayer++){
1281 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1282 chi2Z += (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer])*
1283 (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer]);
1284 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1285 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1286 chi2R += (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer])*
1287 (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer]);
1288 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1290 if (TMath::Sqrt(chi2R)>1./iter) continue;
1291 if (TMath::Sqrt(chi2Z)>7./iter) continue;
1295 Float_t minmax[2]={-100,100};
1296 for (Int_t iLayer=0;iLayer<4;iLayer++){
1297 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer]*0.5+1 -cseed[sLayer+iLayer].fZref[0];
1298 if (max<minmax[1]) minmax[1]=max;
1299 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer]*0.5-1 -cseed[sLayer+iLayer].fZref[0];
1300 if (min>minmax[0]) minmax[0]=min;
1302 Bool_t isFake = kFALSE;
1303 if (cl0->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1304 if (cl1->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1305 if (cl2->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1306 if ((!isFake) || (icl3%10)==0 ){ //debugging print
1307 TTreeSRedirector& cstream = *fDebugStreamer;
1315 "X0="<<xcl[sLayer+0]<<
1316 "X1="<<xcl[sLayer+1]<<
1317 "X2="<<xcl[sLayer+2]<<
1318 "X3="<<xcl[sLayer+3]<<
1323 "Seed0.="<<&cseed[sLayer+0]<<
1324 "Seed1.="<<&cseed[sLayer+1]<<
1325 "Seed2.="<<&cseed[sLayer+2]<<
1326 "Seed3.="<<&cseed[sLayer+3]<<
1327 "Zmin="<<minmax[0]<<
1328 "Zmax="<<minmax[1]<<
1332 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1333 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1334 //<<<<<<<<<<<<<<<<<< FIT SEEDING PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1335 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1341 for (Int_t jLayer=0;jLayer<4;jLayer++){
1342 cseed[sLayer+jLayer].fTilt = hL[sLayer+jLayer];
1343 cseed[sLayer+jLayer].fPadLength = padlength[sLayer+jLayer];
1344 cseed[sLayer+jLayer].fX0 = xcl[sLayer+jLayer];
1345 for (Int_t iter=0; iter<2; iter++){
1347 // in iteration 0 we try only one pad-row
1348 // if quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1350 AliTRDseed tseed = cseed[sLayer+jLayer];
1351 Float_t roadz = padlength[sLayer+jLayer]*0.5;
1352 if (iter>0) roadz = padlength[sLayer+jLayer];
1354 Float_t quality =10000;
1355 for (Int_t iTime=2;iTime<20;iTime++){
1356 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1357 Double_t dxlayer= layer.GetX()-xcl[sLayer+jLayer];
1358 Double_t zexp = cl[sLayer+jLayer]->GetZ() ;
1360 // try 2 pad-rows in second iteration
1361 zexp = tseed.fZref[0]+ tseed.fZref[1]*dxlayer;
1362 if (zexp>cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()+padlength[sLayer+jLayer]*0.5;
1363 if (zexp<cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()-padlength[sLayer+jLayer]*0.5;
1366 Double_t yexp = tseed.fYref[0]+
1367 tseed.fYref[1]*dxlayer;
1368 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz);
1369 if (index<=0) continue;
1370 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1372 tseed.fIndexes[iTime] = index;
1373 tseed.fClusters[iTime] = cl; // register cluster
1374 tseed.fX[iTime] = dxlayer; // register cluster
1375 tseed.fY[iTime] = cl->GetY(); // register cluster
1376 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1379 //count the number of clusters and distortions into quality
1380 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1381 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1382 TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+
1383 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1384 if (iter==0 && tseed.isOK()) {
1385 cseed[sLayer+jLayer] = tseed;
1387 if (tquality<5) break;
1389 if (tseed.isOK() && tquality<quality)
1390 cseed[sLayer+jLayer] = tseed;
1392 if (!cseed[sLayer+jLayer].isOK()){
1396 cseed[sLayer+jLayer].CookLabels();
1397 cseed[sLayer+jLayer].UpdateUsed();
1398 nusedCl+= cseed[sLayer+jLayer].fNUsed;
1405 if (!isOK) continue;
1407 for (Int_t iLayer=0;iLayer<4;iLayer++){
1408 if (cseed[sLayer+iLayer].isOK()){
1409 nclusters+=cseed[sLayer+iLayer].fN2;
1415 for (Int_t iLayer=0;iLayer<4;iLayer++){
1416 rieman.AddPoint(xcl[sLayer+iLayer],cseed[sLayer+iLayer].fYfitR[0],
1417 cseed[sLayer+iLayer].fZProb,1,10);
1423 for (Int_t iLayer=0;iLayer<4;iLayer++){
1424 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1425 chi2R += (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0])*
1426 (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0]);
1427 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1428 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1429 chi2Z += (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz)*
1430 (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz);
1431 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1433 Double_t curv = rieman.GetC();
1438 TMath::Abs(cseed[sLayer+0].fYfitR[1]- cseed[sLayer+0].fYref[1])+
1439 TMath::Abs(cseed[sLayer+1].fYfitR[1]- cseed[sLayer+1].fYref[1])+
1440 TMath::Abs(cseed[sLayer+2].fYfitR[1]- cseed[sLayer+2].fYref[1])+
1441 TMath::Abs(cseed[sLayer+3].fYfitR[1]- cseed[sLayer+3].fYref[1]);
1442 Double_t likea = TMath::Exp(-sumda*10.6);
1443 Double_t likechi2 = 0.0000000001;
1444 if (chi2R<0.5) likechi2+=TMath::Exp(-TMath::Sqrt(chi2R)*7.73);
1445 Double_t likechi2z = TMath::Exp(-chi2Z*0.088)/TMath::Exp(-chi2Z*0.019);
1446 Double_t likeN = TMath::Exp(-(72-nclusters)*0.19);
1447 Double_t like = likea*likechi2*likechi2z*likeN;
1449 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fYref[1]-130*curv)*1.9);
1450 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fZref[1]-
1451 cseed[sLayer+0].fZref[0]/xcl[sLayer+0])*5.9);
1452 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1454 seedquality[registered] = like;
1455 seedlayer[registered] = sLayer;
1456 if (TMath::Log(0.000000000000001+like)<-15) continue;
1457 AliTRDseed seedb[6];
1458 for (Int_t iLayer=0;iLayer<6;iLayer++){
1459 seedb[iLayer] = cseed[iLayer];
1462 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1463 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1464 //<<<<<<<<<<<<<<< FULL TRACK FIT PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1465 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1471 // add new layers - avoid long extrapolation
1473 Int_t tLayer[2]={0,0};
1474 if (sLayer==2) {tLayer[0]=1; tLayer[1]=0;}
1475 if (sLayer==1) {tLayer[0]=5; tLayer[1]=0;}
1476 if (sLayer==0) {tLayer[0]=4; tLayer[1]=5;}
1478 for (Int_t iLayer=0;iLayer<2;iLayer++){
1479 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1480 cseed[jLayer].Reset();
1481 cseed[jLayer].fTilt = hL[jLayer];
1482 cseed[jLayer].fPadLength = padlength[jLayer];
1483 cseed[jLayer].fX0 = xcl[jLayer];
1484 // get pad length and rough cluster
1485 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].fYref[0],
1486 cseed[jLayer].fZref[0],kRoad2y,kRoad2z);
1487 if (indexdummy<=0) continue;
1488 AliTRDcluster *cldummy = (AliTRDcluster*)GetCluster(indexdummy);
1489 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2()*12.);
1491 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1493 for (Int_t iLayer=0;iLayer<2;iLayer++){
1494 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1495 if ( (jLayer==0) && !(cseed[1].isOK())) continue; // break not allowed
1496 if ( (jLayer==5) && !(cseed[4].isOK())) continue; // break not allowed
1497 Float_t zexp = cseed[jLayer].fZref[0];
1498 Double_t zroad = padlength[jLayer]*0.5+1.;
1501 for (Int_t iter=0;iter<2;iter++){
1502 AliTRDseed tseed = cseed[jLayer];
1503 Float_t quality = 10000;
1504 for (Int_t iTime=2;iTime<20;iTime++){
1505 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
1506 Double_t dxlayer = layer.GetX()-xcl[jLayer];
1507 Double_t yexp = tseed.fYref[0]+tseed.fYref[1]*dxlayer;
1508 Float_t yroad = kRoad1y;
1509 Int_t index = layer.FindNearestCluster(yexp,zexp, yroad, zroad);
1510 if (index<=0) continue;
1511 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1513 tseed.fIndexes[iTime] = index;
1514 tseed.fClusters[iTime] = cl; // register cluster
1515 tseed.fX[iTime] = dxlayer; // register cluster
1516 tseed.fY[iTime] = cl->GetY(); // register cluster
1517 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1521 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1522 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1523 TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+
1524 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1526 if (tquality<quality){
1527 cseed[jLayer]=tseed;
1533 if ( cseed[jLayer].isOK()){
1534 cseed[jLayer].CookLabels();
1535 cseed[jLayer].UpdateUsed();
1536 nusedf+= cseed[jLayer].fNUsed;
1537 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1543 AliTRDseed bseed[6];
1544 for (Int_t jLayer=0;jLayer<6;jLayer++){
1545 bseed[jLayer] = cseed[jLayer];
1547 Float_t lastquality = 10000;
1548 Float_t lastchi2 = 10000;
1549 Float_t chi2 = 1000;
1552 for (Int_t iter =0; iter<4;iter++){
1554 // sort tracklets according "quality", try to "improve" 4 worst
1556 Float_t sumquality = 0;
1557 Float_t squality[6];
1558 Int_t sortindexes[6];
1559 for (Int_t jLayer=0;jLayer<6;jLayer++){
1560 if (bseed[jLayer].isOK()){
1561 AliTRDseed &tseed = bseed[jLayer];
1562 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1563 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1564 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1565 TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+
1566 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1567 squality[jLayer] = tquality;
1569 else squality[jLayer]=-1;
1570 sumquality +=squality[jLayer];
1573 if (sumquality>=lastquality || chi2>lastchi2) break;
1574 lastquality = sumquality;
1577 for (Int_t jLayer=0;jLayer<6;jLayer++){
1578 cseed[jLayer] = bseed[jLayer];
1581 TMath::Sort(6,squality,sortindexes,kFALSE);
1584 for (Int_t jLayer=5;jLayer>1;jLayer--){
1585 Int_t bLayer = sortindexes[jLayer];
1586 AliTRDseed tseed = bseed[bLayer];
1587 for (Int_t iTime=2;iTime<20;iTime++){
1588 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
1589 Double_t dxlayer= layer.GetX()-xcl[bLayer];
1591 Double_t zexp = tseed.fZref[0];
1592 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1594 Float_t roadz = padlength[bLayer]+1;
1595 if (TMath::Abs(tseed.fZProb-zexp)> padlength[bLayer]*0.5) {roadz = padlength[bLayer]*0.5;}
1596 if (tseed.fZfit[1]*tseed.fZref[1]<0) {roadz = padlength[bLayer]*0.5;}
1597 if (TMath::Abs(tseed.fZProb-zexp)<0.1*padlength[bLayer]) {
1598 zexp = tseed.fZProb;
1599 roadz = padlength[bLayer]*0.5;
1602 Double_t yexp = tseed.fYref[0]+
1603 tseed.fYref[1]*dxlayer-zcor;
1604 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz);
1605 if (index<=0) continue;
1606 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1608 tseed.fIndexes[iTime] = index;
1609 tseed.fClusters[iTime] = cl; // register cluster
1610 tseed.fX[iTime] = dxlayer; // register cluster
1611 tseed.fY[iTime] = cl->GetY(); // register cluster
1612 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1616 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1617 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1619 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1620 TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+
1621 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1623 if (tquality<squality[bLayer])
1624 bseed[bLayer] = tseed;
1627 chi2 = AliTRDseed::FitRiemanTilt(bseed, kTRUE);
1635 for (Int_t iLayer=0;iLayer<6;iLayer++) {
1636 if (TMath::Abs(cseed[iLayer].fYref[0]/cseed[iLayer].fX0)<0.15)
1638 if (cseed[iLayer].isOK()){
1639 nclusters+=cseed[iLayer].fN2;
1643 if (nlayers<3) continue;
1645 for (Int_t iLayer=0;iLayer<6;iLayer++){
1646 if (cseed[iLayer].isOK()) rieman.AddPoint(xcl[iLayer],cseed[iLayer].fYfitR[0],
1647 cseed[iLayer].fZProb,1,10);
1653 for (Int_t iLayer=0;iLayer<6;iLayer++){
1654 if (cseed[iLayer].isOK()){
1655 cseed[iLayer].fYref[0] = rieman.GetYat(xcl[iLayer]);
1656 chi2RF += (cseed[iLayer].fYref[0]-cseed[iLayer].fYfitR[0])*
1657 (cseed[iLayer].fYref[0]-cseed[iLayer].fYfitR[0]);
1658 cseed[iLayer].fYref[1] = rieman.GetDYat(xcl[iLayer]);
1659 cseed[iLayer].fZref[0] = rieman.GetZat(xcl[iLayer]);
1660 chi2ZF += (cseed[iLayer].fZref[0]- cseed[iLayer].fMeanz)*
1661 (cseed[iLayer].fZref[0]- cseed[iLayer].fMeanz);
1662 cseed[iLayer].fZref[1] = rieman.GetDZat(xcl[iLayer]);
1665 chi2RF/=TMath::Max((nlayers-3.),1.);
1666 chi2ZF/=TMath::Max((nlayers-3.),1.);
1667 curv = rieman.GetC();
1671 Double_t xref2 = (xcl[2]+xcl[3])*0.5; // middle of the chamber
1672 Double_t dzmf = rieman.GetDZat(xref2);
1673 Double_t zmf = rieman.GetZat(xref2);
1678 fitterTC.ClearPoints();
1679 fitterT2.ClearPoints();
1681 for (Int_t iLayer=0; iLayer<6;iLayer++){
1682 if (!cseed[iLayer].isOK()) continue;
1683 for (Int_t itime=0;itime<25;itime++){
1684 if (!cseed[iLayer].fUsable[itime]) continue;
1685 Double_t x = cseed[iLayer].fX[itime]+cseed[iLayer].fX0-xref2; // x relative to the midle chamber
1686 Double_t y = cseed[iLayer].fY[itime];
1687 Double_t z = cseed[iLayer].fZ[itime];
1688 // ExB correction to the correction
1692 Double_t x2 = cseed[iLayer].fX[itime]+cseed[iLayer].fX0; // global x
1694 Double_t t = 1./(x2*x2+y*y);
1696 uvt[0] = 2.*x2*uvt[1]; // u
1698 uvt[2] = 2.0*hL[iLayer]*uvt[1];
1699 uvt[3] = 2.0*hL[iLayer]*x*uvt[1];
1700 uvt[4] = 2.0*(y+hL[iLayer]*z)*uvt[1];
1702 Double_t error = 2*0.2*uvt[1];
1703 fitterT2.AddPoint(uvt,uvt[4],error);
1705 // constrained rieman
1707 z =cseed[iLayer].fZ[itime];
1708 uvt[0] = 2.*x2*t; // u
1709 uvt[1] = 2*hL[iLayer]*x2*uvt[1];
1710 uvt[2] = 2*(y+hL[iLayer]*(z-GetZ()))*t;
1711 fitterTC.AddPoint(uvt,uvt[2],error);
1713 rieman2.AddPoint(x2,y,z,1,10);
1720 Double_t rpolz0 = fitterT2.GetParameter(3);
1721 Double_t rpolz1 = fitterT2.GetParameter(4);
1723 // linear fitter - not possible to make boundaries
1724 // non accept non possible z and dzdx combination
1726 Bool_t acceptablez =kTRUE;
1727 for (Int_t iLayer=0; iLayer<6;iLayer++){
1728 if (cseed[iLayer].isOK()){
1729 Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2);
1730 if (TMath::Abs(cseed[iLayer].fZProb-zT2)>padlength[iLayer]*0.5+1)
1731 acceptablez = kFALSE;
1735 fitterT2.FixParameter(3,zmf);
1736 fitterT2.FixParameter(4,dzmf);
1738 fitterT2.ReleaseParameter(3);
1739 fitterT2.ReleaseParameter(4);
1740 rpolz0 = fitterT2.GetParameter(3);
1741 rpolz1 = fitterT2.GetParameter(4);
1744 Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT);
1745 Double_t chi2TC = fitterTC.GetChisquare()/Float_t(npointsT);
1747 Double_t polz1c = fitterTC.GetParameter(2);
1748 Double_t polz0c = polz1c*xref2;
1750 Double_t aC = fitterTC.GetParameter(0);
1751 Double_t bC = fitterTC.GetParameter(1);
1752 Double_t CC = aC/TMath::Sqrt(bC*bC+1.); // curvature
1754 Double_t aR = fitterT2.GetParameter(0);
1755 Double_t bR = fitterT2.GetParameter(1);
1756 Double_t dR = fitterT2.GetParameter(2);
1757 Double_t CR = 1+bR*bR-dR*aR;
1760 dca = -dR/(TMath::Sqrt(1+bR*bR-dR*aR)+TMath::Sqrt(1+bR*bR));
1761 CR = aR/TMath::Sqrt(CR);
1764 Double_t chi2ZT2=0, chi2ZTC=0;
1765 for (Int_t iLayer=0; iLayer<6;iLayer++){
1766 if (cseed[iLayer].isOK()){
1767 Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2);
1768 Double_t zTC = polz0c+polz1c*(xcl[iLayer] - xref2);
1769 chi2ZT2 += TMath::Abs(cseed[iLayer].fMeanz-zT2);
1770 chi2ZTC += TMath::Abs(cseed[iLayer].fMeanz-zTC);
1773 chi2ZT2/=TMath::Max((nlayers-3.),1.);
1774 chi2ZTC/=TMath::Max((nlayers-3.),1.);
1778 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1780 for (Int_t iLayer=0;iLayer<6;iLayer++){
1781 if (cseed[iLayer].isOK())
1782 sumdaf += TMath::Abs((cseed[iLayer].fYfit[1]-cseed[iLayer].fYref[1])/cseed[iLayer].fSigmaY2);
1784 sumdaf /= Float_t (nlayers-2.);
1786 // likelihoods for full track
1788 Double_t likezf = TMath::Exp(-chi2ZF*0.14);
1789 Double_t likechi2C = TMath::Exp(-chi2TC*0.677);
1790 Double_t likechi2TR = TMath::Exp(-chi2TR*0.78);
1791 Double_t likeaf = TMath::Exp(-sumdaf*3.23);
1792 seedquality2[registered] = likezf*likechi2TR*likeaf;
1793 // Bool_t isGold = kFALSE;
1795 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
1796 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
1797 // if (isGold &&nusedf<10){
1798 // for (Int_t jLayer=0;jLayer<6;jLayer++){
1799 // if ( seed[index][jLayer].isOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
1800 // seed[index][jLayer].UseClusters(); //sign gold
1807 if (!cseed[0].isOK()){
1809 if (!cseed[1].isOK()) index0 = 2;
1811 seedparams[registered][0] = cseed[index0].fX0;
1812 seedparams[registered][1] = cseed[index0].fYref[0];
1813 seedparams[registered][2] = cseed[index0].fZref[0];
1814 seedparams[registered][5] = CR;
1815 seedparams[registered][3] = cseed[index0].fX0*CR - TMath::Sin(TMath::ATan(cseed[0].fYref[1]));
1816 seedparams[registered][4] = cseed[index0].fZref[1]/
1817 TMath::Sqrt(1+cseed[index0].fYref[1]*cseed[index0].fYref[1]);
1818 seedparams[registered][6] = ns;
1821 Int_t labels[12], outlab[24];
1823 for (Int_t iLayer=0;iLayer<6;iLayer++){
1824 if (!cseed[iLayer].isOK()) continue;
1825 if (cseed[iLayer].fLabels[0]>=0) {
1826 labels[nlab] = cseed[iLayer].fLabels[0];
1829 if (cseed[iLayer].fLabels[1]>=0) {
1830 labels[nlab] = cseed[iLayer].fLabels[1];
1834 Freq(nlab,labels,outlab,kFALSE);
1835 Int_t label = outlab[0];
1836 Int_t frequency = outlab[1];
1837 for (Int_t iLayer=0;iLayer<6;iLayer++){
1838 cseed[iLayer].fFreq = frequency;
1839 cseed[iLayer].fC = CR;
1840 cseed[iLayer].fCC = CC;
1841 cseed[iLayer].fChi2 = chi2TR;
1842 cseed[iLayer].fChi2Z = chi2ZF;
1845 if (1||(!isFake)){ //debugging print
1846 Float_t zvertex = GetZ();
1847 TTreeSRedirector& cstream = *fDebugStreamer;
1850 "Vertex="<<zvertex<<
1851 "Rieman2.="<<&rieman2<<
1852 "Rieman.="<<&rieman<<
1862 "Chi2RF="<<chi2RF<< //chi2 of trackletes on full track
1863 "Chi2ZF="<<chi2ZF<< //chi2 z on tracklets on full track
1864 "Chi2ZT2="<<chi2ZT2<< //chi2 z on tracklets on full track - rieman tilt
1865 "Chi2ZTC="<<chi2ZTC<< //chi2 z on tracklets on full track - rieman tilt const
1867 "Chi2TR="<<chi2TR<< //chi2 without vertex constrain
1868 "Chi2TC="<<chi2TC<< //chi2 with vertex constrain
1869 "C="<<curv<< // non constrained - no tilt correction
1870 "DR="<<dR<< // DR parameter - tilt correction
1871 "DCA="<<dca<< // DCA - tilt correction
1872 "CR="<<CR<< // non constrained curvature - tilt correction
1873 "CC="<<CC<< // constrained curvature
1879 "Nlayers="<<nlayers<<
1880 "NUsedS="<<nusedCl<<
1882 "Findable="<<findable<<
1884 "LikePrim="<<likePrim<<
1885 "Likechi2C="<<likechi2C<<
1886 "Likechi2TR="<<likechi2TR<<
1888 "LikeF="<<seedquality2[registered]<<
1895 "SB0.="<<&seedb[0]<<
1896 "SB1.="<<&seedb[1]<<
1897 "SB2.="<<&seedb[2]<<
1898 "SB3.="<<&seedb[3]<<
1899 "SB4.="<<&seedb[4]<<
1900 "SB5.="<<&seedb[5]<<
1902 "Freq="<<frequency<<
1906 if (registered<maxseed-1) {
1908 cseed = seed[registered];
1910 }// end of loop over layer 1
1911 } // end of loop over layer 0
1912 } // end of loop over layer 3
1913 } // end of loop over seeding time bins
1917 TMath::Sort(registered,seedquality2,sort,kTRUE);
1918 Bool_t signedseed[maxseed];
1919 for (Int_t i=0;i<registered;i++){
1920 signedseed[i]= kFALSE;
1922 for (Int_t iter=0; iter<5; iter++){
1923 for (Int_t iseed=0;iseed<registered;iseed++){
1924 Int_t index = sort[iseed];
1925 if (signedseed[index]) continue;
1926 Int_t labelsall[1000];
1929 Int_t sLayer = seedlayer[index];
1934 for (Int_t jLayer=0;jLayer<6;jLayer++){
1935 if (TMath::Abs(seed[index][jLayer].fYref[0]/xcl[jLayer])<0.15)
1937 if (seed[index][jLayer].isOK()){
1938 seed[index][jLayer].UpdateUsed();
1939 ncl +=seed[index][jLayer].fN2;
1940 nused +=seed[index][jLayer].fNUsed;
1943 for (Int_t itime=0;itime<25;itime++){
1944 if (seed[index][jLayer].fUsable[itime]){
1946 for (Int_t ilab=0;ilab<3;ilab++){
1947 Int_t tindex = seed[index][jLayer].fClusters[itime]->GetLabel(ilab);
1949 labelsall[nlabelsall] = tindex;
1958 if (nused>30) continue;
1961 if (nlayers<6) continue;
1962 if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue; // gold
1966 if (nlayers<findable) continue;
1967 if (TMath::Log(0.000000001+seedquality2[index])<-4.) continue; //
1972 if (nlayers==findable || nlayers==6) continue;
1973 if (TMath::Log(0.000000001+seedquality2[index])<-6.) continue;
1977 if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue;
1981 if (TMath::Log(0.000000001+seedquality2[index])-nused/(nlayers-3.)<-15.) continue;
1984 signedseed[index] = kTRUE;
1986 Int_t labels[1000], outlab[1000];
1988 for (Int_t iLayer=0;iLayer<6;iLayer++){
1989 if (seed[index][iLayer].isOK()){
1990 if (seed[index][iLayer].fLabels[0]>=0) {
1991 labels[nlab] = seed[index][iLayer].fLabels[0];
1994 if (seed[index][iLayer].fLabels[1]>=0) {
1995 labels[nlab] = seed[index][iLayer].fLabels[1];
2000 Freq(nlab,labels,outlab,kFALSE);
2001 Int_t label = outlab[0];
2002 Int_t frequency = outlab[1];
2003 Freq(nlabelsall,labelsall,outlab,kFALSE);
2004 Int_t label1 = outlab[0];
2005 Int_t label2 = outlab[2];
2006 Float_t fakeratio = (naccepted-outlab[1])/Float_t(naccepted);
2007 Float_t ratio = Float_t(nused)/Float_t(ncl);
2009 for (Int_t jLayer=0;jLayer<6;jLayer++){
2010 if ( seed[index][jLayer].isOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.2 )
2011 seed[index][jLayer].UseClusters(); //sign gold
2015 Int_t eventNr = esd->GetEventNumber();
2016 TTreeSRedirector& cstream = *fDebugStreamer;
2020 AliTRDtrack * track = RegisterSeed(seed[index],seedparams[index]);
2022 if (!track) track=&dummy;
2024 AliESDtrack esdtrack;
2025 esdtrack.UpdateTrackParams(track, AliESDtrack::kTRDout);
2026 esdtrack.SetLabel(label);
2027 esd->AddTrack(&esdtrack);
2028 TTreeSRedirector& cstream = *fDebugStreamer;
2030 "EventNr="<<eventNr<<
2031 "ESD.="<<&esdtrack<<
2033 "trdback.="<<track<<
2040 "Like="<<seedquality[index]<<
2041 "LikeF="<<seedquality2[index]<<
2042 "S0.="<<&seed[index][0]<<
2043 "S1.="<<&seed[index][1]<<
2044 "S2.="<<&seed[index][2]<<
2045 "S3.="<<&seed[index][3]<<
2046 "S4.="<<&seed[index][4]<<
2047 "S5.="<<&seed[index][5]<<
2051 "FakeRatio="<<fakeratio<<
2052 "Freq="<<frequency<<
2054 "Nlayers="<<nlayers<<
2055 "Findable="<<findable<<
2058 "EventNr="<<eventNr<<
2062 } // end of loop over sectors
2066 //_____________________________________________________________________________
2067 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree) const
2070 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2071 // from the file. The names of the cluster tree and branches
2072 // should match the ones used in AliTRDclusterizer::WriteClusters()
2074 Int_t nsize = Int_t(ClusterTree->GetTotBytes()/(sizeof(AliTRDcluster)));
2075 TObjArray *clusterArray = new TObjArray(nsize+1000);
2077 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2079 Error("ReadClusters","Can't get the branch !");
2082 branch->SetAddress(&clusterArray);
2084 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2085 // printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
2087 // Loop through all entries in the tree
2089 AliTRDcluster *c = 0;
2091 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2094 nbytes += ClusterTree->GetEvent(iEntry);
2096 // Get the number of points in the detector
2097 Int_t nCluster = clusterArray->GetEntriesFast();
2098 // printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2100 // Loop through all TRD digits
2101 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2102 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
2103 AliTRDcluster *co = c;
2105 // delete clusterArray->RemoveAt(iCluster);
2106 clusterArray->RemoveAt(iCluster);
2109 // cout<<"Allocated"<<nsize<<"\tLoaded"<<array->GetEntriesFast()<<"\n";
2111 delete clusterArray;
2116 //__________________________________________________________________
2117 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint& p) const
2120 // Get track space point with index i
2121 // Origin: C.Cheshkov
2124 AliTRDcluster *cl = (AliTRDcluster*)fClusters->UncheckedAt(index);
2125 Int_t idet = cl->GetDetector();
2126 Int_t isector = fGeom->GetSector(idet);
2127 Int_t ichamber= fGeom->GetChamber(idet);
2128 Int_t iplan = fGeom->GetPlane(idet);
2130 local[0]=GetX(isector,iplan,cl->GetLocalTimeBin());
2131 local[1]=cl->GetY();
2132 local[2]=cl->GetZ();
2134 fGeom->RotateBack(idet,local,global);
2135 p.SetXYZ(global[0],global[1],global[2]);
2136 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
2139 iLayer = AliAlignObj::kTRD1;
2142 iLayer = AliAlignObj::kTRD2;
2145 iLayer = AliAlignObj::kTRD3;
2148 iLayer = AliAlignObj::kTRD4;
2151 iLayer = AliAlignObj::kTRD5;
2154 iLayer = AliAlignObj::kTRD6;
2157 Int_t modId = isector*fGeom->Ncham()+ichamber;
2158 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
2159 p.SetVolumeID(volid);
2165 //__________________________________________________________________
2166 void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2169 // This cooks a label. Mmmmh, smells good...
2172 Int_t label=123456789, index, i, j;
2173 Int_t ncl=pt->GetNumberOfClusters();
2174 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
2178 // Int_t s[kRange][2];
2179 Int_t **s = new Int_t* [kRange];
2180 for (i=0; i<kRange; i++) {
2181 s[i] = new Int_t[2];
2183 for (i=0; i<kRange; i++) {
2189 for (i=0; i<ncl; i++) {
2190 index=pt->GetClusterIndex(i);
2191 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2197 for (i=0; i<ncl; i++) {
2198 index=pt->GetClusterIndex(i);
2199 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2200 for (Int_t k=0; k<3; k++) {
2201 label=c->GetLabel(k);
2202 labelAdded=kFALSE; j=0;
2204 while ( (!labelAdded) && ( j < kRange ) ) {
2205 if (s[j][0]==label || s[j][1]==0) {
2219 for (i=0; i<kRange; i++) {
2221 max=s[i][1]; label=s[i][0];
2225 for (i=0; i<kRange; i++) {
2231 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
2233 pt->SetLabel(label);
2238 //__________________________________________________________________
2239 void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2242 // Use clusters, but don't abuse them!
2244 const Float_t kmaxchi2 =18;
2245 const Float_t kmincl =10;
2246 AliTRDtrack * track = (AliTRDtrack*)t;
2248 Int_t ncl=t->GetNumberOfClusters();
2249 for (Int_t i=from; i<ncl; i++) {
2250 Int_t index = t->GetClusterIndex(i);
2251 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2253 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2254 if (track->fTracklets[iplane].GetChi2()>kmaxchi2) continue;
2255 if (track->fTracklets[iplane].GetN()<kmincl) continue;
2256 if (!(c->IsUsed())) c->Use();
2261 //_____________________________________________________________________
2262 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2264 // Parametrised "expected" error of the cluster reconstruction in Y
2266 Double_t s = 0.08 * 0.08;
2270 //_____________________________________________________________________
2271 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2273 // Parametrised "expected" error of the cluster reconstruction in Z
2275 Double_t s = 9 * 9 /12.;
2279 //_____________________________________________________________________
2280 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2283 // Returns radial position which corresponds to time bin <localTB>
2284 // in tracking sector <sector> and plane <plane>
2287 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2288 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2289 return fTrSec[sector]->GetLayer(pl)->GetX();
2294 //_______________________________________________________
2295 AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
2296 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex, Int_t plane)
2299 // AliTRDpropagationLayer constructor
2302 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
2303 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
2306 for(Int_t i=0; i < (Int_t) kZones; i++) {
2307 fZc[i]=0; fZmax[i] = 0;
2312 if(fTimeBinIndex >= 0) {
2313 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2314 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2317 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
2328 //_______________________________________________________
2329 void AliTRDtracker::AliTRDpropagationLayer::SetHole(
2330 Double_t Zmax, Double_t Ymax, Double_t rho,
2331 Double_t radLength, Double_t Yc, Double_t Zc)
2334 // Sets hole in the layer
2342 fHoleX0 = radLength;
2346 //_______________________________________________________
2347 AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs)
2350 // AliTRDtrackingSector Constructor
2352 AliTRDpadPlane *padPlane = 0;
2358 // get holes description from geometry
2359 Bool_t holes[AliTRDgeometry::kNcham];
2360 //printf("sector\t%d\t",gs);
2361 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
2362 holes[icham] = fGeom->IsHole(0,icham,gs);
2363 //printf("%d",holes[icham]);
2367 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
2370 AliTRDpropagationLayer* ppl;
2372 Double_t x, dx, rho, radLength;
2375 // add layers for each of the planes
2376 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2377 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2380 const Int_t kNchambers = AliTRDgeometry::Ncham();
2382 Double_t ymaxsensitive=0;
2383 Double_t *zc = new Double_t[kNchambers];
2384 Double_t *zmax = new Double_t[kNchambers];
2385 Double_t *zmaxsensitive = new Double_t[kNchambers];
2387 AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
2390 printf("<AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector> ");
2391 printf("Could not get common params\n");
2395 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
2397 ymax = fGeom->GetChamberWidth(plane)/2.;
2398 // Modidified for new pad plane class, 22.04.05 (C.B.)
2399 padPlane = commonParam->GetPadPlane(plane,0);
2400 ymaxsensitive = (padPlane->GetColSize(1)*padPlane->GetNcols()-4)/2.;
2401 for(Int_t ch = 0; ch < kNchambers; ch++) {
2402 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
2404 // Modidified for new pad plane class, 22.04.05 (C.B.)
2405 Float_t pad = padPlane->GetRowSize(1);
2406 Float_t row0 = commonParam->GetRow0(plane,ch,0);
2407 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
2408 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
2409 zc[ch] = -(pad * nPads)/2 + row0;
2412 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
2413 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
2414 rho = 0.00295 * 0.85; radLength = 11.0;
2416 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
2417 Double_t xbottom = x0 - dxDrift;
2418 Double_t xtop = x0 + dxAmp;
2420 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2421 for (Int_t iTime = 0; iTime<nTimeBins; iTime++){
2422 Double_t xlayer = iTime*dx - dxAmp;
2423 //if (xlayer<0) xlayer=dxAmp/2.;
2426 tbIndex = CookTimeBinIndex(plane, iTime);
2427 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex, plane);
2428 ppl->SetYmax(ymax,ymaxsensitive);
2429 ppl->SetZ(zc, zmax, zmaxsensitive);
2430 ppl->SetHoles(holes);
2438 delete [] zmaxsensitive;
2442 //______________________________________________________
2444 Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
2447 // depending on the digitization parameters calculates "global"
2448 // time bin index for timebin <localTB> in plane <plane>
2451 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2452 Int_t gtb = (plane+1) * tbPerPlane - localTB;
2453 if (localTB<0) return -1;
2454 if (gtb<0) return -1;
2458 //______________________________________________________
2460 void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2463 // For all sensitive time bins sets corresponding layer index
2464 // in the array fTimeBins
2469 for(Int_t i = 0; i < fN; i++) {
2470 index = fLayers[i]->GetTimeBinIndex();
2472 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2474 if(index < 0) continue;
2475 if(index >= (Int_t) kMaxTimeBinIndex) {
2476 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2477 printf(" index %d exceeds allowed maximum of %d!\n",
2478 index, kMaxTimeBinIndex-1);
2481 fTimeBinIndex[index] = i;
2484 Double_t x1, dx1, x2, dx2, gap;
2486 for(Int_t i = 0; i < fN-1; i++) {
2487 x1 = fLayers[i]->GetX();
2488 dx1 = fLayers[i]->GetdX();
2489 x2 = fLayers[i+1]->GetX();
2490 dx2 = fLayers[i+1]->GetdX();
2491 gap = (x2 - dx2/2) - (x1 + dx1/2);
2492 // if(gap < -0.01) {
2493 // printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
2494 // printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
2497 // printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
2498 // printf(" (%f - %f) - (%f + %f) = %f\n",
2499 // x2, dx2/2, x1, dx1, gap);
2505 //______________________________________________________
2508 Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2511 // Returns the number of time bin which in radial position is closest to <x>
2514 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2515 if(x <= fLayers[0]->GetX()) return 0;
2517 Int_t b=0, e=fN-1, m=(b+e)/2;
2518 for (; b<e; m=(b+e)/2) {
2519 if (x > fLayers[m]->GetX()) b=m+1;
2522 if(TMath::Abs(x - fLayers[m]->GetX()) >
2523 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2528 //______________________________________________________
2530 Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2533 // Returns number of the innermost SENSITIVE propagation layer
2536 return GetLayerNumber(0);
2539 //______________________________________________________
2541 Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2544 // Returns number of the outermost SENSITIVE time bin
2547 return GetLayerNumber(GetNumberOfTimeBins() - 1);
2550 //______________________________________________________
2552 Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2555 // Returns number of SENSITIVE time bins
2559 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
2560 layer = GetLayerNumber(tb);
2566 //______________________________________________________
2568 void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2571 // Insert layer <pl> in fLayers array.
2572 // Layers are sorted according to X coordinate.
2574 if ( fN == ((Int_t) kMaxLayersPerSector)) {
2575 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2578 if (fN==0) {fLayers[fN++] = pl; return;}
2579 Int_t i=Find(pl->GetX());
2581 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2582 fLayers[i]=pl; fN++;
2586 //______________________________________________________
2588 Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2591 // Returns index of the propagation layer nearest to X
2594 if (x <= fLayers[0]->GetX()) return 0;
2595 if (x > fLayers[fN-1]->GetX()) return fN;
2596 Int_t b=0, e=fN-1, m=(b+e)/2;
2597 for (; b<e; m=(b+e)/2) {
2598 if (x > fLayers[m]->GetX()) b=m+1;
2608 //______________________________________________________
2609 void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2612 // set centers and the width of sectors
2613 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2614 fZc[icham] = center[icham];
2615 fZmax[icham] = w[icham];
2616 fZmaxSensitive[icham] = wsensitive[icham];
2617 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2620 //______________________________________________________
2622 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2625 // set centers and the width of sectors
2627 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2628 fIsHole[icham] = holes[icham];
2629 if (holes[icham]) fHole = kTRUE;
2637 //______________________________________________________
2639 void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
2642 // Insert cluster in cluster array.
2643 // Clusters are sorted according to Y coordinate.
2645 if(fTimeBinIndex < 0) {
2646 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
2650 if (fN== (Int_t) kMaxClusterPerTimeBin) {
2651 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
2654 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
2655 Int_t i=Find(c->GetY());
2656 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
2657 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
2658 fIndex[i]=index; fClusters[i]=c; fN++;
2661 //______________________________________________________
2663 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const {
2665 // Returns index of the cluster nearest in Y
2667 if (fN<=0) return 0;
2668 if (y <= fClusters[0]->GetY()) return 0;
2669 if (y > fClusters[fN-1]->GetY()) return fN;
2670 Int_t b=0, e=fN-1, m=(b+e)/2;
2671 for (; b<e; m=(b+e)/2) {
2672 if (y > fClusters[m]->GetY()) b=m+1;
2678 Int_t AliTRDtracker::AliTRDpropagationLayer::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad, Float_t maxroadz) const
2681 // Returns index of the cluster nearest to the given y,z
2685 Float_t mindist = maxroad;
2687 for (Int_t i=Find(y-maxroad); i<maxn; i++) {
2688 AliTRDcluster* c=(AliTRDcluster*)(fClusters[i]);
2689 Float_t ycl = c->GetY();
2691 if (ycl > y+maxroad) break;
2692 if (TMath::Abs(c->GetZ()-z) > maxroadz) continue;
2693 if (TMath::Abs(ycl-y)<mindist){
2694 mindist = TMath::Abs(ycl-y);
2702 //---------------------------------------------------------
2704 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
2706 // Returns correction factor for tilted pads geometry
2708 Int_t det = c->GetDetector();
2709 Int_t plane = fGeom->GetPlane(det);
2710 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
2711 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
2713 if(fNoTilt) h01 = 0;
2718 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack& TRDtrack)
2720 // *** ADDED TO GET MORE INFORMATION FOR TRD PID ---- PS
2721 // This is setting fdEdxPlane and fTimBinPlane
2722 // Sums up the charge in each plane for track TRDtrack and also get the
2723 // Time bin for Max. Cluster
2724 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
2726 Double_t clscharge[kNPlane], maxclscharge[kNPlane];
2727 Int_t nCluster[kNPlane], timebin[kNPlane];
2729 //Initialization of cluster charge per plane.
2730 for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2731 clscharge[iPlane] = 0.0;
2732 nCluster[iPlane] = 0;
2733 timebin[iPlane] = -1;
2734 maxclscharge[iPlane] = 0.0;
2737 // Loop through all clusters associated to track TRDtrack
2738 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
2739 for (Int_t iClus = 0; iClus < nClus; iClus++) {
2740 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
2741 Int_t index = TRDtrack.GetClusterIndex(iClus);
2742 AliTRDcluster *TRDcluster = (AliTRDcluster *) GetCluster(index);
2743 if (!TRDcluster) continue;
2744 Int_t tb = TRDcluster->GetLocalTimeBin();
2746 Int_t detector = TRDcluster->GetDetector();
2747 Int_t iPlane = fGeom->GetPlane(detector);
2748 clscharge[iPlane] = clscharge[iPlane]+charge;
2749 if(charge > maxclscharge[iPlane]) {
2750 maxclscharge[iPlane] = charge;
2751 timebin[iPlane] = tb;
2754 } // end of loop over cluster
2756 // Setting the fdEdxPlane and fTimBinPlane variabales
2757 Double_t Total_ch = 0;
2758 for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2759 // Quality control of TRD track.
2760 if (nCluster[iPlane]<= 5) {
2761 clscharge[iPlane]=0.0;
2764 if (nCluster[iPlane]) clscharge[iPlane] /= nCluster[iPlane];
2765 TRDtrack.SetPIDsignals(clscharge[iPlane], iPlane);
2766 TRDtrack.SetPIDTimBin(timebin[iPlane], iPlane);
2767 Total_ch= Total_ch+clscharge[iPlane];
2770 // Int_t nc=TRDtrack.GetNumberOfClusters();
2772 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
2774 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2775 // TRDtrack.SetPIDsignals(dedx, iPlane);
2776 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
2779 } // end of function
2782 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack * track, Int_t *clusters,AliTRDtracklet&tracklet)
2786 // try to find nearest clusters to the track in timebins from t0 to t1
2790 // correction coeficients - depends on TRD parameters - to be changed according it
2793 Double_t x[100],yt[100],zt[100];
2794 Double_t xmean=0; //reference x
2795 Double_t dz[10][100],dy[10][100];
2796 Float_t zmean[100], nmean[100];
2798 Int_t indexes[10][100]; // indexes of the clusters in the road
2799 AliTRDcluster *cl[10][100]; // pointers to the clusters in the road
2800 Int_t best[10][100]; // index of best matching cluster
2804 for (Int_t it=0;it<=t1-t0; it++){
2812 for (Int_t ih=0;ih<10;ih++){
2813 indexes[ih][it]=-2; //reset indexes1
2821 Double_t x0 = track->GetX();
2822 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
2827 Float_t padlength=0;
2828 AliTRDtrack track2(*track);
2829 Float_t snpy = track->GetSnp();
2830 Float_t tany = TMath::Sqrt(snpy*snpy/(1.-snpy*snpy));
2831 if (snpy<0) tany*=-1;
2833 Double_t sy2=ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
2834 Double_t sz2=ExpectedSigmaZ2(x0,track->GetTgl());
2835 Double_t road = 15.*sqrt(track->GetSigmaY2() + sy2);
2836 if (road>6.) road=6.;
2839 for (Int_t it=0;it<t1-t0;it++){
2840 Double_t maxChi2[2]={fgkMaxChi2,fgkMaxChi2};
2841 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(it+t0));
2842 if (timeBin==0) continue; // no indexes1
2843 Int_t maxn = timeBin;
2844 x[it] = timeBin.GetX();
2845 track2.PropagateTo(x[it]);
2846 yt[it] = track2.GetY();
2847 zt[it] = track2.GetZ();
2849 Double_t y=yt[it],z=zt[it];
2850 Double_t chi2 =1000000;
2853 // find 2 nearest cluster at given time bin
2856 for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
2857 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
2858 h01 = GetTiltFactor(c);
2860 Int_t det = c->GetDetector();
2861 plane = fGeom->GetPlane(det);
2862 padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
2864 // if (c->GetLocalTimeBin()==0) continue;
2865 if (c->GetY() > y+road) break;
2866 if((c->GetZ()-z)*(c->GetZ()-z) > 12. * sz2) continue;
2868 Double_t dist = TMath::Abs(c->GetZ()-z);
2869 if (dist> (0.5*padlength+6.*sigmaz)) continue; // 6 sigma boundary cut
2872 if (dist> (0.5*padlength-sigmaz)){ // sigma boundary cost function
2873 cost = (dist-0.5*padlength)/(2.*sigmaz);
2874 if (cost>-1) cost= (cost+1.)*(cost+1.);
2877 // Int_t label = TMath::Abs(track->GetLabel());
2878 // if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
2879 chi2=track2.GetPredictedChi2(c,h01)+cost;
2882 if (chi2 > maxChi2[1]) continue;
2884 for (Int_t ih=2;ih<9; ih++){ //store the clusters in the road
2887 indexes[ih][it] =timeBin.GetIndex(i); // index - 9 - reserved for outliers
2892 if (chi2 <maxChi2[0]){
2893 maxChi2[1] = maxChi2[0];
2895 indexes[1][it] = indexes[0][it];
2896 cl[1][it] = cl[0][it];
2897 indexes[0][it] = timeBin.GetIndex(i);
2903 indexes[1][it] =timeBin.GetIndex(i);
2911 if (nfound<4) return 0;
2912 xmean /=Float_t(nfound); // middle x
2913 track2.PropagateTo(xmean); // propagate track to the center
2915 // choose one of the variants
2921 Double_t sumdy2 = 0;
2931 Double_t moffset[10]; // mean offset
2932 Double_t mean[10]; // mean value
2933 Double_t angle[10]; // angle
2935 Double_t smoffset[10]; // sigma of mean offset
2936 Double_t smean[10]; // sigma of mean value
2937 Double_t sangle[10]; // sigma of angle
2938 Double_t smeanangle[10]; // correlation
2940 Double_t sigmas[10];
2941 Double_t tchi2s[10]; // chi2s for tracklet
2945 for (Int_t it=0;it<t1-t0;it++){
2946 if (!cl[0][it]) continue;
2947 for (Int_t dt=-3;dt<=3;dt++){
2948 if (it+dt<0) continue;
2949 if (it+dt>t1-t0) continue;
2950 if (!cl[0][it+dt]) continue;
2951 zmean[it]+=cl[0][it+dt]->GetZ();
2954 zmean[it]/=nmean[it];
2957 for (Int_t it=0; it<t1-t0;it++){
2959 for (Int_t ih=0;ih<10;ih++){
2962 if (!cl[ih][it]) continue;
2963 Double_t xcluster = cl[ih][it]->GetX();
2964 Double_t ytrack,ztrack;
2965 track2.GetProlongation(xcluster, ytrack, ztrack );
2966 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // calculate distance from track in z
2967 dy[ih][it] = cl[ih][it]->GetY()+ dz[ih][it]*h01 -ytrack; // in y
2970 if (!cl[0][it]) continue;
2971 if (TMath::Abs(cl[0][it]->GetZ()-zmean[it])> padlength*0.8 &&cl[1][it])
2972 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it])< padlength*0.5){
2977 // iterative choosing of "best path"
2980 Int_t label = TMath::Abs(track->GetLabel());
2983 for (Int_t iter=0;iter<9;iter++){
2986 sumz = 0; sum=0; sumdy=0;sumdy2=0;sumx=0;sumx2=0;sumxy=0;mpads=0; ngood[iter]=0; nbad[iter]=0;
2988 for (Int_t it=0;it<t1-t0;it++){
2989 if (!cl[best[iter][it]][it]) continue;
2990 //calculates pad-row changes
2991 Double_t zbefore= cl[best[iter][it]][it]->GetZ();
2992 Double_t zafter = cl[best[iter][it]][it]->GetZ();
2993 for (Int_t itd = it-1; itd>=0;itd--) {
2994 if (cl[best[iter][itd]][itd]) {
2995 zbefore= cl[best[iter][itd]][itd]->GetZ();
2999 for (Int_t itd = it+1; itd<t1-t0;itd++) {
3000 if (cl[best[iter][itd]][itd]) {
3001 zafter= cl[best[iter][itd]][itd]->GetZ();
3005 if (TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore)>0.1&&TMath::Abs(cl[best[iter][it]][it]->GetZ()-zafter)>0.1) changes[iter]++;
3007 Double_t dx = x[it]-xmean; // distance to reference x
3008 sumz += cl[best[iter][it]][it]->GetZ();
3010 sumdy += dy[best[iter][it]][it];
3011 sumdy2+= dy[best[iter][it]][it]*dy[best[iter][it]][it];
3014 sumxy += dx*dy[best[iter][it]][it];
3015 mpads += cl[best[iter][it]][it]->GetNPads();
3016 if (cl[best[iter][it]][it]->GetLabel(0)==label || cl[best[iter][it]][it]->GetLabel(1)==label||cl[best[iter][it]][it]->GetLabel(2)==label){
3024 // calculates line parameters
3026 Double_t det = sum*sumx2-sumx*sumx;
3027 angle[iter] = (sum*sumxy-sumx*sumdy)/det;
3028 mean[iter] = (sumx2*sumdy-sumx*sumxy)/det;
3029 meanz[iter] = sumz/sum;
3030 moffset[iter] = sumdy/sum;
3031 mpads /= sum; // mean number of pads
3034 Double_t sigma2 = 0; // normalized residuals - for line fit
3035 Double_t sigma1 = 0; // normalized residuals - constant fit
3037 for (Int_t it=0;it<t1-t0;it++){
3038 if (!cl[best[iter][it]][it]) continue;
3039 Double_t dx = x[it]-xmean;
3040 Double_t ytr = mean[iter]+angle[iter]*dx;
3041 sigma2 += (dy[best[iter][it]][it]-ytr)*(dy[best[iter][it]][it]-ytr);
3042 sigma1 += (dy[best[iter][it]][it]-moffset[iter])*(dy[best[iter][it]][it]-moffset[iter]);
3045 sigma2 /=(sum-2); // normalized residuals
3046 sigma1 /=(sum-1); // normalized residuals
3048 smean[iter] = sigma2*(sumx2/det); // estimated error2 of mean
3049 sangle[iter] = sigma2*(sum/det); // estimated error2 of angle
3050 smeanangle[iter] = sigma2*(-sumx/det); // correlation
3053 sigmas[iter] = TMath::Sqrt(sigma1); //
3054 smoffset[iter]= (sigma1/sum)+0.01*0.01; // sigma of mean offset + unisochronity sigma
3056 // iterative choosing of "better path"
3058 for (Int_t it=0;it<t1-t0;it++){
3059 if (!cl[best[iter][it]][it]) continue;
3061 Double_t sigmatr2 = smoffset[iter]+0.5*tany*tany; //add unisochronity + angular effect contribution
3062 Double_t sweight = 1./sigmatr2+1./track->GetSigmaY2();
3063 Double_t weighty = (moffset[iter]/sigmatr2)/sweight; // weighted mean
3064 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1+track->GetSigmaY2()); //
3065 Double_t mindist=100000;
3067 for (Int_t ih=0;ih<10;ih++){
3068 if (!cl[ih][it]) break;
3069 Double_t dist2 = (dy[ih][it]-weighty)/sigmacl;
3070 dist2*=dist2; //chi2 distance
3076 best[iter+1][it]=ihbest;
3079 // update best hypothesy if better chi2 according tracklet position and angle
3081 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3082 Double_t sa2 = sangle[iter] + track->fCee;
3083 Double_t say = track->fCey;
3084 // Double_t chi20 = mean[bestiter]*mean[bestiter]/sy2+angle[bestiter]*angle[bestiter]/sa2;
3085 // Double_t chi21 = mean[iter]*mean[iter]/sy2+angle[iter]*angle[iter]/sa2;
3087 Double_t detchi = sy2*sa2-say*say;
3088 Double_t invers[3] = {sa2/detchi, sy2/detchi, -say/detchi}; //inverse value of covariance matrix
3090 Double_t chi20 = mean[bestiter]*mean[bestiter]*invers[0]+angle[bestiter]*angle[bestiter]*invers[1]+
3091 2.*mean[bestiter]*angle[bestiter]*invers[2];
3092 Double_t chi21 = mean[iter]*mean[iter]*invers[0]+angle[iter]*angle[iter]*invers[1]+
3093 2*mean[iter]*angle[iter]*invers[2];
3094 tchi2s[iter] =chi21;
3096 if (changes[iter]<=changes[bestiter] && chi21<chi20) {
3103 Double_t sigma2 = sigmas[0]; // choose as sigma from 0 iteration
3104 Short_t maxpos = -1;
3105 Float_t maxcharge = 0;
3106 Short_t maxpos4 = -1;
3107 Float_t maxcharge4 = 0;
3108 Short_t maxpos5 = -1;
3109 Float_t maxcharge5 = 0;
3111 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
3112 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
3114 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0));
3115 Double_t expectederr = sigma2*sigma2+0.01*0.01;
3116 if (mpads>3.5) expectederr += (mpads-3.5)*0.04;
3117 if (changes[bestiter]>1) expectederr+= changes[bestiter]*0.01;
3118 expectederr+=(0.03*(tany-exB)*(tany-exB))*15;
3119 // if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
3120 //expectederr+=10000;
3121 for (Int_t it=0;it<t1-t0;it++){
3122 if (!cl[best[bestiter][it]][it]) continue;
3123 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // set cluster error
3124 if (!cl[best[bestiter][it]][it]->IsUsed()){
3125 cl[best[bestiter][it]][it]->SetY( cl[best[bestiter][it]][it]->GetY());
3126 // cl[best[bestiter][it]][it]->Use();
3129 // time bins with maximal charge
3130 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){
3131 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3132 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3135 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){
3136 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){
3137 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3138 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3141 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){
3142 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){
3143 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3144 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3148 // time bins with maximal charge
3149 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){
3150 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3151 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3154 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){
3155 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){
3156 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3157 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3160 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){
3161 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){
3162 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3163 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3166 clusters[it+t0] = indexes[best[bestiter][it]][it];
3167 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 && cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0] = indexes[best[bestiter][it]][it]; //Test
3170 // set tracklet parameters
3172 Double_t trackleterr2 = smoffset[bestiter]+0.01*0.01;
3173 if (mpads>3.5) trackleterr2 += (mpads-3.5)*0.04;
3174 trackleterr2+= changes[bestiter]*0.01;
3175 trackleterr2*= TMath::Max(14.-nfound,1.);
3176 trackleterr2+= 0.2*(tany-exB)*(tany-exB);
3178 tracklet.Set(xmean, track2.GetY()+moffset[bestiter], meanz[bestiter], track2.GetAlpha(), trackleterr2); //set tracklet parameters
3179 tracklet.SetTilt(h01);
3180 tracklet.SetP0(mean[bestiter]);
3181 tracklet.SetP1(angle[bestiter]);
3182 tracklet.SetN(nfound);
3183 tracklet.SetNCross(changes[bestiter]);
3184 tracklet.SetPlane(plane);
3185 tracklet.SetSigma2(expectederr);
3186 tracklet.SetChi2(tchi2s[bestiter]);
3187 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
3188 track->fTracklets[plane] = tracklet;
3189 track->fNWrong+=nbad[0];
3193 TClonesArray array0("AliTRDcluster");
3194 TClonesArray array1("AliTRDcluster");
3195 array0.ExpandCreateFast(t1-t0+1);
3196 array1.ExpandCreateFast(t1-t0+1);
3197 TTreeSRedirector& cstream = *fDebugStreamer;
3198 AliTRDcluster dummy;
3202 for (Int_t it=0;it<t1-t0;it++){
3203 dy0[it] = dy[0][it];
3204 dyb[it] = dy[best[bestiter][it]][it];
3206 new(array0[it]) AliTRDcluster(*cl[0][it]);
3209 new(array0[it]) AliTRDcluster(dummy);
3211 if(cl[best[bestiter][it]][it]) {
3212 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
3215 new(array1[it]) AliTRDcluster(dummy);
3218 TGraph graph0(t1-t0,x,dy0);
3219 TGraph graph1(t1-t0,x,dyb);
3220 TGraph graphy(t1-t0,x,yt);
3221 TGraph graphz(t1-t0,x,zt);
3224 cstream<<"tracklet"<<
3225 "track.="<<track<< // track parameters
3226 "tany="<<tany<< // tangent of the local track angle
3227 "xmean="<<xmean<< // xmean - reference x of tracklet
3228 "tilt="<<h01<< // tilt angle
3229 "nall="<<nall<< // number of foundable clusters
3230 "nfound="<<nfound<< // number of found clusters
3231 "clfound="<<clfound<< // total number of found clusters in road
3232 "mpads="<<mpads<< // mean number of pads per cluster
3233 "plane="<<plane<< // plane number
3234 "road="<<road<< // the width of the used road
3235 "graph0.="<<&graph0<< // x - y = dy for closest cluster
3236 "graph1.="<<&graph1<< // x - y = dy for second closest cluster
3237 "graphy.="<<&graphy<< // y position of the track
3238 "graphz.="<<&graphz<< // z position of the track
3239 // "fCl.="<<&array0<< // closest cluster
3240 //"fCl2.="<<&array1<< // second closest cluster
3241 "maxpos="<<maxpos<< // maximal charge postion
3242 "maxcharge="<<maxcharge<< // maximal charge
3243 "maxpos4="<<maxpos4<< // maximal charge postion - after bin 4
3244 "maxcharge4="<<maxcharge4<< // maximal charge - after bin 4
3245 "maxpos5="<<maxpos5<< // maximal charge postion - after bin 5
3246 "maxcharge5="<<maxcharge5<< // maximal charge - after bin 5
3248 "bestiter="<<bestiter<< // best iteration number
3249 "tracklet.="<<&tracklet<< // corrspond to the best iteration
3250 "tchi20="<<tchi2s[0]<< // chi2 of cluster in the 0 iteration
3251 "tchi2b="<<tchi2s[bestiter]<< // chi2 of cluster in the best iteration
3252 "sigmas0="<<sigmas[0]<< // residuals sigma
3253 "sigmasb="<<sigmas[bestiter]<< // residulas sigma
3255 "ngood0="<<ngood[0]<< // number of good clusters in 0 iteration
3256 "nbad0="<<nbad[0]<< // number of bad clusters in 0 iteration
3257 "ngoodb="<<ngood[bestiter]<< // in best iteration
3258 "nbadb="<<nbad[bestiter]<< // in best iteration
3260 "changes0="<<changes[0]<< // changes of pardrows in iteration number 0
3261 "changesb="<<changes[bestiter]<< // changes of pardrows in best iteration
3263 "moffset0="<<moffset[0]<< // offset fixing angle in iter=0
3264 "smoffset0="<<smoffset[0]<< // sigma of offset fixing angle in iter=0
3265 "moffsetb="<<moffset[bestiter]<< // offset fixing angle in iter=best
3266 "smoffsetb="<<smoffset[bestiter]<< // sigma of offset fixing angle in iter=best
3268 "mean0="<<mean[0]<< // mean dy in iter=0;
3269 "smean0="<<smean[0]<< // sigma of mean dy in iter=0
3270 "meanb="<<mean[bestiter]<< // mean dy in iter=best
3271 "smeanb="<<smean[bestiter]<< // sigma of mean dy in iter=best
3273 "angle0="<<angle[0]<< // angle deviation in the iteration number 0
3274 "sangle0="<<sangle[0]<< // sigma of angular deviation in iteration number 0
3275 "angleb="<<angle[bestiter]<< // angle deviation in the best iteration
3276 "sangleb="<<sangle[bestiter]<< // sigma of angle deviation in the best iteration
3278 "expectederr="<<expectederr<< // expected error of cluster position
3286 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down)
3289 // Sort eleements according occurancy
3290 // The size of output array has is 2*n
3292 Int_t * sindexS = new Int_t[n]; // temp array for sorting
3293 Int_t * sindexF = new Int_t[2*n];
3294 for (Int_t i=0;i<n;i++) sindexF[i]=0;
3296 TMath::Sort(n,inlist, sindexS, down);
3297 Int_t last = inlist[sindexS[0]];
3300 sindexF[0+n] = last;
3304 for(Int_t i=1;i<n; i++){
3305 val = inlist[sindexS[i]];
3306 if (last == val) sindexF[countPos]++;
3309 sindexF[countPos+n] = val;
3310 sindexF[countPos]++;
3314 if (last==val) countPos++;
3315 // sort according frequency
3316 TMath::Sort(countPos, sindexF, sindexS, kTRUE);
3317 for (Int_t i=0;i<countPos;i++){
3318 outlist[2*i ] = sindexF[sindexS[i]+n];
3319 outlist[2*i+1] = sindexF[sindexS[i]];
3327 AliTRDtrack * AliTRDtracker::RegisterSeed(AliTRDseed * seeds, Double_t * params)
3332 Double_t alpha=AliTRDgeometry::GetAlpha();
3333 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
3336 c[1] = 0 ; c[2] = 2;
3337 c[3] = 0 ; c[4] = 0; c[5] = 0.02;
3338 c[6] = 0 ; c[7] = 0; c[8] = 0; c[9] = 0.1;
3339 c[10] = 0 ; c[11] = 0; c[12] = 0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
3342 AliTRDcluster *cl =0;
3343 for (Int_t ilayer=0;ilayer<6;ilayer++){
3344 if (seeds[ilayer].isOK()){
3345 for (Int_t itime=22;itime>0;itime--){
3346 if (seeds[ilayer].fIndexes[itime]>0){
3347 index = seeds[ilayer].fIndexes[itime];
3348 cl = seeds[ilayer].fClusters[itime];
3355 if (cl==0) return 0;
3356 AliTRDtrack * track = new AliTRDtrack(cl,index,¶ms[1],c, params[0],params[6]*alpha+shift);
3357 track->PropagateTo(params[0]-5.);
3358 track->ResetCovariance(1);
3360 Int_t rc=FollowBackProlongation(*track);
3366 CookdEdxTimBin(*track);
3367 CookLabel(track, 0.9);
3377 AliTRDseed::AliTRDseed()
3381 fTilt =0; // tilting angle
3382 fPadLength = 0; // pad length
3383 fX0 = 0; // x0 position
3384 for (Int_t i=0;i<25;i++){
3385 fX[i]=0; // !x position
3386 fY[i]=0; // !y position
3387 fZ[i]=0; // !z position
3388 fIndexes[i]=0; // !indexes
3389 fClusters[i]=0; // !clusters
3391 for (Int_t i=0;i<2;i++){
3392 fYref[i]=0; // reference y
3393 fZref[i]=0; // reference z
3394 fYfit[i]=0; // y fit position +derivation
3395 fYfitR[i]=0; // y fit position +derivation
3396 fZfit[i]=0; // z fit position
3397 fZfitR[i]=0; // z fit position
3398 fLabels[i]=0; // labels
3402 fMeanz=0; // mean vaue of z
3403 fZProb=0; // max probbable z
3406 fN=0; // number of associated clusters
3407 fN2=0; // number of not crossed
3408 fNUsed=0; // number of used clusters
3409 fNChange=0; // change z counter
3412 void AliTRDseed::Reset(){
3416 for (Int_t i=0;i<25;i++){
3417 fX[i]=0; // !x position
3418 fY[i]=0; // !y position
3419 fZ[i]=0; // !z position
3420 fIndexes[i]=0; // !indexes
3421 fClusters[i]=0; // !clusters
3422 fUsable[i] = kFALSE;
3424 for (Int_t i=0;i<2;i++){
3425 fYref[i]=0; // reference y
3426 fZref[i]=0; // reference z
3427 fYfit[i]=0; // y fit position +derivation
3428 fYfitR[i]=0; // y fit position +derivation
3429 fZfit[i]=0; // z fit position
3430 fZfitR[i]=0; // z fit position
3431 fLabels[i]=-1; // labels
3433 fSigmaY =0; //"robust" sigma in y
3434 fSigmaY2=0; //"robust" sigma in y
3435 fMeanz =0; // mean vaue of z
3436 fZProb =0; // max probbable z
3439 fN=0; // number of associated clusters
3440 fN2=0; // number of not crossed
3441 fNUsed=0; // number of used clusters
3442 fNChange=0; // change z counter
3445 void AliTRDseed::CookLabels(){
3447 // cook 2 labels for seed
3452 for (Int_t i=0;i<25;i++){
3453 if (!fClusters[i]) continue;
3454 for (Int_t ilab=0;ilab<3;ilab++){
3455 if (fClusters[i]->GetLabel(ilab)>=0){
3456 labels[nlab] = fClusters[i]->GetLabel(ilab);
3461 Int_t nlab2 = AliTRDtracker::Freq(nlab,labels,out,kTRUE);
3462 fLabels[0] = out[0];
3463 if (nlab2>1 && out[3]>1) fLabels[1] =out[2];
3466 void AliTRDseed::UseClusters()
3471 for (Int_t i=0;i<25;i++){
3472 if (!fClusters[i]) continue;
3473 if (!(fClusters[i]->IsUsed())) fClusters[i]->Use();
3478 void AliTRDseed::Update(){
3482 const Float_t ratio = 0.8;
3483 const Int_t kClmin = 6;
3484 const Float_t kmaxtan = 2;
3485 if (TMath::Abs(fYref[1])>kmaxtan) return; // too much inclined track
3487 Float_t sigmaexp = 0.05+TMath::Abs(fYref[1]*0.25); // expected r.m.s in y direction
3488 Float_t ycrosscor = fPadLength*fTilt*0.5; // y correction for crossing
3491 Double_t sumw, sumwx,sumwx2;
3492 Double_t sumwy, sumwxy, sumwz,sumwxz;
3493 Int_t zints[25]; // histograming of the z coordinate - get 1 and second max probable coodinates in z
3495 Float_t allowedz[25]; // allowed z for given time bin
3496 Float_t yres[25]; // residuals from reference
3497 Float_t anglecor = fTilt*fZref[1]; //correction to the angle
3501 for (Int_t i=0;i<25;i++){
3503 if (!fClusters[i]) continue;
3504 yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y
3505 zints[fN] = Int_t(fZ[i]);
3508 if (fN<kClmin) return;
3509 Int_t nz = AliTRDtracker::Freq(fN,zints,zouts,kFALSE);
3511 if (nz<=1) zouts[3]=0;
3512 if (zouts[1]+zouts[3]<kClmin) return;
3514 if (TMath::Abs(zouts[0]-zouts[2])>12.) zouts[3]=0; // z distance bigger than pad - length
3516 Int_t breaktime = -1;
3517 Bool_t mbefore = kFALSE;
3519 Int_t counts[2]={0,0};
3523 // find the break time allowing one chage on pad-rows with maximal numebr of accepted clusters
3526 for (Int_t i=0;i<25;i++){
3527 cumul[i][0] = counts[0];
3528 cumul[i][1] = counts[1];
3529 if (TMath::Abs(fZ[i]-zouts[0])<2) counts[0]++;
3530 if (TMath::Abs(fZ[i]-zouts[2])<2) counts[1]++;
3533 for (Int_t i=0;i<24;i++) {
3534 Int_t after = cumul[24][0]-cumul[i][0];
3535 Int_t before = cumul[i][1];
3536 if (after+before>maxcount) {
3537 maxcount=after+before;
3541 after = cumul[24][1]-cumul[i][1];
3542 before = cumul[i][0];
3543 if (after+before>maxcount) {
3544 maxcount=after+before;
3551 for (Int_t i=0;i<25;i++){
3552 if (i>breaktime) allowedz[i] = mbefore ? zouts[2]:zouts[0];
3553 if (i<=breaktime) allowedz[i] = (!mbefore) ? zouts[2]:zouts[0];
3555 if ( (allowedz[0]>allowedz[24] && fZref[1]<0) || (allowedz[0]<allowedz[24] && fZref[1]>0)){
3557 // tracklet z-direction not in correspondance with track z direction
3560 for (Int_t i=0;i<25;i++){
3561 allowedz[i] = zouts[0]; //only longest taken
3567 // cross pad -row tracklet - take the step change into account
3569 for (Int_t i=0;i<25;i++){
3570 if (!fClusters[i]) continue;
3571 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3572 yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y
3573 if (TMath::Abs(fZ[i]-fZProb)>2){
3574 if (fZ[i]>fZProb) yres[i]+=fTilt*fPadLength;
3575 if (fZ[i]<fZProb) yres[i]-=fTilt*fPadLength;
3581 Double_t mean,sigma;
3582 for (Int_t i=0;i<25;i++){
3583 if (!fClusters[i]) continue;
3584 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3585 yres2[fN2] = yres[i];
3592 EvaluateUni(fN2,yres2,mean,sigma,Int_t(fN2*ratio-2));
3593 if (sigma<sigmaexp*0.8) sigma=sigmaexp;
3598 sumw=0; sumwx=0; sumwx2=0;
3599 sumwy=0; sumwxy=0; sumwz=0;sumwxz=0;
3604 for (Int_t i=0;i<25;i++){
3606 if (!fClusters[i]) continue;
3607 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3608 if (TMath::Abs(yres[i]-mean)>4.*sigma) continue;
3611 fMPads+=fClusters[i]->GetNPads();
3613 if (fClusters[i]->GetNPads()>4) weight=0.5;
3614 if (fClusters[i]->GetNPads()>5) weight=0.2;
3617 sumw+=weight; sumwx+=x*weight; sumwx2+=x*x*weight;
3618 sumwy+=weight*yres[i]; sumwxy+=weight*(yres[i])*x;
3619 sumwz+=weight*fZ[i]; sumwxz+=weight*fZ[i]*x;
3625 fMeanz = sumwz/sumw;
3626 Float_t correction =0;
3628 // tracklet on boundary
3629 if (fMeanz<fZProb) correction = ycrosscor;
3630 if (fMeanz>fZProb) correction = -ycrosscor;
3632 Double_t det = sumw*sumwx2-sumwx*sumwx;
3633 fYfitR[0] = (sumwx2*sumwy-sumwx*sumwxy)/det;
3634 fYfitR[1] = (sumw*sumwxy-sumwx*sumwy)/det;
3637 for (Int_t i=0;i<25;i++){
3638 if (!fUsable[i]) continue;
3639 Float_t delta = yres[i]-fYfitR[0]-fYfitR[1]*fX[i];
3640 fSigmaY2+=delta*delta;
3642 fSigmaY2 = TMath::Sqrt(fSigmaY2/Float_t(fN2-2));
3644 fZfitR[0] = (sumwx2*sumwz-sumwx*sumwxz)/det;
3645 fZfitR[1] = (sumw*sumwxz-sumwx*sumwz)/det;
3646 fZfit[0] = (sumwx2*sumwz-sumwx*sumwxz)/det;
3647 fZfit[1] = (sumw*sumwxz-sumwx*sumwz)/det;
3648 fYfitR[0] += fYref[0]+correction;
3649 fYfitR[1] += fYref[1];
3650 fYfit[0] = fYfitR[0];
3651 fYfit[1] = fYfitR[1];
3662 void AliTRDseed::UpdateUsed(){
3665 for (Int_t i=0;i<25;i++){
3666 if (!fClusters[i]) continue;
3667 if ((fClusters[i]->IsUsed())) fNUsed++;
3672 void AliTRDseed::EvaluateUni(Int_t nvectors, Double_t *data, Double_t &mean, Double_t &sigma, Int_t hh)
3675 // robust estimator in 1D case MI version
3677 //for the univariate case
3678 //estimates of location and scatter are returned in mean and sigma parameters
3679 //the algorithm works on the same principle as in multivariate case -
3680 //it finds a subset of size hh with smallest sigma, and then returns mean and
3681 //sigma of this subset
3685 Double_t faclts[]={2.6477,2.5092,2.3826,2.2662,2.1587,2.0589,1.9660,1.879,1.7973,1.7203,1.6473};
3686 Int_t *index=new Int_t[nvectors];
3687 TMath::Sort(nvectors, data, index, kFALSE);
3689 Int_t nquant = TMath::Min(Int_t(Double_t(((hh*1./nvectors)-0.5)*40))+1, 11);
3690 Double_t factor = faclts[nquant-1];
3695 Int_t bestindex = -1;
3696 Double_t bestmean = 0;
3697 Double_t bestsigma = data[index[nvectors-1]]-data[index[0]]; // maximal possible sigma
3698 for (Int_t i=0; i<hh; i++){
3699 sumx += data[index[i]];
3700 sumx2 += data[index[i]]*data[index[i]];
3703 Double_t norm = 1./Double_t(hh);
3704 Double_t norm2 = 1./Double_t(hh-1);
3705 for (Int_t i=hh; i<nvectors; i++){
3706 Double_t cmean = sumx*norm;
3707 Double_t csigma = (sumx2 - hh*cmean*cmean)*norm2;
3708 if (csigma<bestsigma){
3715 sumx += data[index[i]]-data[index[i-hh]];
3716 sumx2 += data[index[i]]*data[index[i]]-data[index[i-hh]]*data[index[i-hh]];
3719 Double_t bstd=factor*TMath::Sqrt(TMath::Abs(bestsigma));
3726 Float_t AliTRDseed::FitRiemanTilt(AliTRDseed * cseed, Bool_t terror){
3730 TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed
3731 fitterT2.StoreData(kTRUE);
3732 Float_t xref2 = (cseed[2].fX0+cseed[3].fX0)*0.5; // reference x0 for z
3735 fitterT2.ClearPoints();
3736 for (Int_t iLayer=0; iLayer<6;iLayer++){
3737 if (!cseed[iLayer].isOK()) continue;
3738 Double_t tilt = cseed[iLayer].fTilt;
3740 for (Int_t itime=0;itime<25;itime++){
3741 if (!cseed[iLayer].fUsable[itime]) continue;
3742 Double_t x = cseed[iLayer].fX[itime]+cseed[iLayer].fX0-xref2; // x relative to the midle chamber
3743 Double_t y = cseed[iLayer].fY[itime];
3744 Double_t z = cseed[iLayer].fZ[itime];
3748 Double_t x2 = cseed[iLayer].fX[itime]+cseed[iLayer].fX0; // global x
3749 Double_t t = 1./(x2*x2+y*y);
3751 uvt[0] = 2.*x2*uvt[1]; // u
3752 uvt[2] = 2.0*tilt*uvt[1];
3753 uvt[3] = 2.0*tilt*x*uvt[1];
3754 uvt[4] = 2.0*(y+tilt*z)*uvt[1];
3756 Double_t error = 2*uvt[1];
3757 if (terror) error*=cseed[iLayer].fSigmaY;
3758 else {error *=0.2;} //default error
3759 fitterT2.AddPoint(uvt,uvt[4],error);
3764 Double_t rpolz0 = fitterT2.GetParameter(3);
3765 Double_t rpolz1 = fitterT2.GetParameter(4);
3767 // linear fitter - not possible to make boundaries
3768 // non accept non possible z and dzdx combination
3770 Bool_t acceptablez =kTRUE;
3771 for (Int_t iLayer=0; iLayer<6;iLayer++){
3772 if (cseed[iLayer].isOK()){
3773 Double_t zT2 = rpolz0+rpolz1*(cseed[iLayer].fX0 - xref2);
3774 if (TMath::Abs(cseed[iLayer].fZProb-zT2)>cseed[iLayer].fPadLength*0.5+1)
3775 acceptablez = kFALSE;
3779 Double_t zmf = cseed[2].fZref[0]+cseed[2].fZref[1]*(xref2-cseed[2].fX0);
3780 Double_t dzmf = (cseed[2].fZref[1]+ cseed[3].fZref[1])*0.5;
3781 fitterT2.FixParameter(3,zmf);
3782 fitterT2.FixParameter(4,dzmf);
3784 fitterT2.ReleaseParameter(3);
3785 fitterT2.ReleaseParameter(4);
3786 rpolz0 = fitterT2.GetParameter(3);
3787 rpolz1 = fitterT2.GetParameter(4);
3790 Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT);
3792 params[0] = fitterT2.GetParameter(0);
3793 params[1] = fitterT2.GetParameter(1);
3794 params[2] = fitterT2.GetParameter(2);
3795 Double_t CR = 1+params[1]*params[1]-params[2]*params[0];
3796 for (Int_t iLayer = 0; iLayer<6;iLayer++){
3797 Double_t x = cseed[iLayer].fX0;
3798 Double_t y=0,dy=0, z=0, dz=0;
3800 Double_t res2 = (x*params[0]+params[1]);
3802 res2 = 1.-params[2]*params[0]+params[1]*params[1]-res2;
3804 res2 = TMath::Sqrt(res2);
3805 y = (1-res2)/params[0];
3808 Double_t x0 = -params[1]/params[0];
3809 if (-params[2]*params[0]+params[1]*params[1]+1>0){
3810 Double_t Rm1 = params[0]/TMath::Sqrt(-params[2]*params[0]+params[1]*params[1]+1);
3811 if ( 1./(Rm1*Rm1)-(x-x0)*(x-x0)>0){
3812 Double_t res = (x-x0)/TMath::Sqrt(1./(Rm1*Rm1)-(x-x0)*(x-x0));
3813 if (params[0]<0) res*=-1.;
3817 z = rpolz0+rpolz1*(x-xref2);
3819 cseed[iLayer].fYref[0] = y;
3820 cseed[iLayer].fYref[1] = dy;
3821 cseed[iLayer].fZref[0] = z;
3822 cseed[iLayer].fZref[1] = dz;
3823 cseed[iLayer].fC = CR;