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 //
21 // Based on Kalman filltering approach //
24 // M. Ivanov (Marian.Ivanov@cern.ch) //
25 // Y. Belikov (Jouri.Belikov@cern.ch) //
27 ///////////////////////////////////////////////////////////////////////////////
32 #include <TLinearFitter.h>
33 #include <TObjArray.h>
36 #include <TTreeStream.h>
38 #include "AliESDEvent.h"
39 #include "AliESDtrack.h"
40 #include "AliAlignObj.h"
41 #include "AliRieman.h"
42 #include "AliTrackPointArray.h"
44 #include "AliTRDgeometry.h"
45 #include "AliTRDpadPlane.h"
46 #include "AliTRDgeometry.h"
47 #include "AliTRDcluster.h"
48 #include "AliTRDtrack.h"
49 #include "AliTRDseed.h"
50 #include "AliTRDcalibDB.h"
51 #include "AliTRDCommonParam.h"
52 #include "AliTRDtracker.h"
53 #include "AliTRDReconstructor.h"
54 #include "AliTRDCalibraFillHisto.h"
56 ClassImp(AliTRDtracker)
58 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5; //
59 const Float_t AliTRDtracker::fgkLabelFraction = 0.8; //
60 const Double_t AliTRDtracker::fgkMaxChi2 = 12.0; //
61 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Maximum local sine of the azimuthal angle
62 const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
64 //_____________________________________________________________________________
65 AliTRDtracker::AliTRDtracker()
92 // Default constructor
95 for (Int_t i = 0; i < kTrackingSectors; i++) {
103 //_____________________________________________________________________________
104 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
113 ,fTimeBinsPerPlane(0)
114 ,fAddTRDseeds(kFALSE)
136 //_____________________________________________________________________________
137 AliTRDtracker::AliTRDtracker(const TFile */*geomfile*/)
141 ,fClusters(new TObjArray(2000))
143 ,fSeeds(new TObjArray(2000))
145 ,fTracks(new TObjArray(1000))
146 ,fTimeBinsPerPlane(0)
147 ,fAddTRDseeds(kFALSE)
167 TDirectory *savedir = gDirectory;
169 fGeom = new AliTRDgeometry();
171 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
173 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
176 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(0,0);
177 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
178 if (tiltAngle < 0.1) {
182 if (!AliTRDcalibDB::Instance()) {
183 AliFatal("Could not get calibration object");
185 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
187 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
195 //_____________________________________________________________________________
196 AliTRDtracker::~AliTRDtracker()
199 // Destructor of AliTRDtracker
221 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
222 delete fTrSec[geomS];
225 if (fDebugStreamer) {
226 delete fDebugStreamer;
231 //_____________________________________________________________________________
232 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
235 // Transform internal TRD ID to global detector ID
238 Int_t isector = fGeom->GetSector(lid);
239 Int_t ichamber = fGeom->GetChamber(lid);
240 Int_t iplan = fGeom->GetPlane(lid);
242 AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
245 iLayer = AliGeomManager::kTRD1;
248 iLayer = AliGeomManager::kTRD2;
251 iLayer = AliGeomManager::kTRD3;
254 iLayer = AliGeomManager::kTRD4;
257 iLayer = AliGeomManager::kTRD5;
260 iLayer = AliGeomManager::kTRD6;
264 Int_t modId = isector * fGeom->Ncham() + ichamber;
265 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
271 //_____________________________________________________________________________
272 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
275 // Transform global detector ID to local detector ID
279 AliGeomManager::ELayerID layerId = AliGeomManager::VolUIDToLayer(gid,modId);
281 Int_t isector = modId / fGeom->Ncham();
282 Int_t ichamber = modId % fGeom->Ncham();
286 case AliGeomManager::kTRD1:
289 case AliGeomManager::kTRD2:
292 case AliGeomManager::kTRD3:
295 case AliGeomManager::kTRD4:
298 case AliGeomManager::kTRD5:
301 case AliGeomManager::kTRD6:
312 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
318 //_____________________________________________________________________________
319 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
322 // Rotates the track when necessary
325 Double_t alpha = AliTRDgeometry::GetAlpha();
326 Double_t y = track->GetY();
327 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
330 if (!track->Rotate( alpha)) {
334 else if (y < -ymax) {
335 if (!track->Rotate(-alpha)) {
344 //_____________________________________________________________________________
345 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
346 , Int_t timebin, UInt_t &index)
349 // Try to find cluster in the backup list
352 AliTRDcluster *cl =0;
353 Int_t *indexes = track->GetBackupIndexes();
355 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
356 if (indexes[i] == 0) {
359 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
363 if (cli->GetLocalTimeBin() != timebin) {
366 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
367 if (iplane == plane) {
378 //_____________________________________________________________________________
379 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
382 // Return last updated plane
386 Int_t *indexes = track->GetBackupIndexes();
388 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
389 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
393 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
394 if (iplane > lastplane) {
403 //_____________________________________________________________________________
404 Int_t AliTRDtracker::Clusters2Tracks(AliESDEvent *event)
407 // Finds tracks within the TRD. The ESD event is expected to contain seeds
408 // at the outer part of the TRD. The seeds
409 // are found within the TRD if fAddTRDseeds is TRUE.
410 // The tracks are propagated to the innermost time bin
411 // of the TRD and the ESD event is updated
414 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
415 Float_t foundMin = fgkMinClustersInTrack * timeBins;
418 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
420 Int_t n = event->GetNumberOfTracks();
421 for (Int_t i = 0; i < n; i++) {
423 AliESDtrack *seed = event->GetTrack(i);
424 ULong_t status = seed->GetStatus();
425 if ((status & AliESDtrack::kTRDout) == 0) {
428 if ((status & AliESDtrack::kTRDin) != 0) {
433 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
434 //seed2->ResetCovariance();
435 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
436 AliTRDtrack &t = *pt;
437 FollowProlongation(t);
438 if (t.GetNumberOfClusters() >= foundMin) {
440 CookLabel(pt,1 - fgkLabelFraction);
445 Double_t xTPC = 250.0;
446 if (PropagateToX(t,xTPC,fgkMaxStep)) {
447 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
454 AliInfo(Form("Number of loaded seeds: %d",nseed));
455 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
456 AliInfo(Form("Total number of found tracks: %d",found));
462 //_____________________________________________________________________________
463 Int_t AliTRDtracker::PropagateBack(AliESDEvent *event)
466 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
467 // backpropagated by the TPC tracker. Each seed is first propagated
468 // to the TRD, and then its prolongation is searched in the TRD.
469 // If sufficiently long continuation of the track is found in the TRD
470 // the track is updated, otherwise it's stored as originaly defined
471 // by the TPC tracker.
474 Int_t found = 0; // number of tracks found
475 Float_t foundMin = 20.0;
477 // Sort tracks according to covariance of local Y and Z
478 Int_t nSeed = event->GetNumberOfTracks();
479 Float_t *quality = new Float_t[nSeed];
480 Int_t *index = new Int_t[nSeed];
481 for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) {
482 AliESDtrack *seed = event->GetTrack(iSeed);
483 Double_t covariance[15];
484 seed->GetExternalCovariance(covariance);
485 quality[iSeed] = covariance[0] + covariance[2];
487 TMath::Sort(nSeed,quality,index,kFALSE);
489 // Backpropagate all seeds
490 for (Int_t iSeed = 0; iSeed < nSeed; iSeed++) {
492 // Get the seeds in sorted sequence
493 AliESDtrack *seed = event->GetTrack(index[iSeed]);
494 fHBackfit->Fill(0); // All seeds
496 // Check the seed status
497 ULong_t status = seed->GetStatus();
498 if ((status & AliESDtrack::kTPCout) == 0) {
499 fHBackfit->Fill(1); // TPC outer edge reached
502 if ((status & AliESDtrack::kTRDout) != 0) {
503 fHBackfit->Fill(2); // TRD outer edge reached (does this happen ?)
507 // Do the back prolongation
508 Int_t lbl = seed->GetLabel();
509 AliTRDtrack *track = new AliTRDtrack(*seed);
510 track->SetSeedLabel(lbl);
511 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
513 Float_t p4 = track->GetC();
514 Int_t expectedClr = FollowBackProlongation(*track);
515 fHBackfit->Fill(3); // Back prolongation done
516 fHX->Fill(track->GetX());
517 // !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
519 if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
520 (track->Pt() > 0.8)) {
525 // Make backup for back propagation
528 Int_t foundClr = track->GetNumberOfClusters();
529 if (foundClr >= foundMin) {
531 track->CookdEdxTimBin(seed->GetID()); // A.Bercuci 25.07.07
532 CookLabel(track,1 - fgkLabelFraction);
533 if (track->GetBackupTrack()) {
534 UseClusters(track->GetBackupTrack());
537 // Sign only gold tracks
538 if (track->GetChi2() / track->GetNumberOfClusters() < 4) {
539 if ((seed->GetKinkIndex(0) == 0) &&
540 (track->Pt() < 1.5)) {
544 Bool_t isGold = kFALSE;
547 if (track->GetChi2() / track->GetNumberOfClusters() < 5) {
548 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
549 if (track->GetBackupTrack()) {
550 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
559 (track->GetNCross() == 0) &&
560 (track->GetChi2() / track->GetNumberOfClusters() < 7)) {
561 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
562 if (track->GetBackupTrack()) {
563 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
569 (track->GetBackupTrack())) {
570 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
571 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
572 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
577 if ((track->StatusForTOF() > 0) &&
578 (track->GetNCross() == 0) &&
579 (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) {
580 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
588 // Debug part of tracking
589 TTreeSRedirector &cstream = *fDebugStreamer;
590 Int_t eventNrInFile = event->GetEventNumberInFile(); // This is most likely NOT the event number you'd like to use. It has nothing to do with the 'real' event number.
591 if (AliTRDReconstructor::StreamLevel() > 0) {
592 if (track->GetBackupTrack()) {
594 << "EventNrInFile=" << eventNrInFile
597 << "trdback.=" << track->GetBackupTrack()
602 << "EventNrInFile=" << eventNrInFile
605 << "trdback.=" << track
611 // Propagation to the TOF (I.Belikov)
612 if (track->GetStop() == kFALSE) {
615 Double_t xtof = 371.0;
616 Double_t xTOF0 = 370.0;
618 Double_t c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
619 if (TMath::Abs(c2) >= 0.99) {
626 PropagateToX(*track,xTOF0,fgkMaxStep);
628 // Energy losses taken to the account - check one more time
629 c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
630 if (TMath::Abs(c2) >= 0.99) {
637 //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) {
638 // fHBackfit->Fill(7);
643 Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
645 track->GetYAt(xtof,GetBz(),y);
647 if (!track->Rotate( AliTRDgeometry::GetAlpha())) {
653 else if (y < -ymax) {
654 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
661 if (track->PropagateTo(xtof)) {
662 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
665 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
666 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
667 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
669 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
671 //seed->SetTRDtrack(new AliTRDtrack(*track));
672 if (track->GetNumberOfClusters() > foundMin) {
683 if ((track->GetNumberOfClusters() > 15) &&
684 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
686 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
689 //seed->SetStatus(AliESDtrack::kTRDStop);
690 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
691 for (Int_t j = 0; j <AliESDtrack::kNSlice; j++) {
692 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
694 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
696 //seed->SetTRDtrack(new AliTRDtrack(*track));
702 seed->SetTRDQuality(track->StatusForTOF());
703 seed->SetTRDBudget(track->GetBudget(0));
709 AliInfo(Form("Number of seeds: %d",fNseeds));
710 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
713 if (AliTRDReconstructor::SeedingOn()) {
714 MakeSeedsMI(3,5,event);
729 //_____________________________________________________________________________
730 Int_t AliTRDtracker::RefitInward(AliESDEvent *event)
733 // Refits tracks within the TRD. The ESD event is expected to contain seeds
734 // at the outer part of the TRD.
735 // The tracks are propagated to the innermost time bin
736 // of the TRD and the ESD event is updated
737 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
740 //Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
741 //Float_t foundMin = fgkMinClustersInTrack * timeBins;
745 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
748 Int_t n = event->GetNumberOfTracks();
749 for (Int_t i = 0; i < n; i++) {
751 AliESDtrack *seed = event->GetTrack(i);
752 new (&seed2) AliTRDtrack(*seed);
755 if (seed2.GetX() < 270.0) {
756 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
761 ULong_t status = seed->GetStatus();
762 if ((status & AliESDtrack::kTRDout) == 0) {
766 if ((status & AliESDtrack::kTRDin) != 0) {
774 seed2.ResetCovariance(50.0);
776 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
777 Int_t *indexes2 = seed2.GetIndexes();
778 for (Int_t i = 0; i < AliESDtrack::kNPlane;i++) {
779 for (Int_t j = 0; j < AliESDtrack::kNSlice;j++) {
780 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
782 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
785 Int_t *indexes3 = pt->GetBackupIndexes();
786 for (Int_t i = 0; i < 200;i++) {
787 if (indexes2[i] == 0) {
790 indexes3[i] = indexes2[i];
793 FollowProlongation(*pt);
795 pt->CookdEdxTimBin(seed->GetID());
796 pt->SetPIDMethod(AliTRDtrack::kLQ); //switch between TRD PID methods
800 Double_t xTPC = 250.0;
801 if (PropagateToX(*pt,xTPC,fgkMaxStep)) {
803 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
806 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
807 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
808 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
810 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
816 // If not prolongation to TPC - propagate without update
818 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
819 seed2->ResetCovariance(5.0);
820 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
823 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
826 pt2->CookdEdxTimBin(seed->GetID());
827 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
830 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
831 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
832 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
834 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
839 // Add TRD track to ESDfriendTrack - maybe this tracks are
840 // not useful for post-processing - TODO make decision
841 if (AliTRDReconstructor::StreamLevel() > 0) {
842 seed->AddCalibObject(new AliTRDtrack(*pt2/*, kTRUE*/));
848 // Add TRD track to ESDfriendTrack
849 if (AliTRDReconstructor::StreamLevel() > 0) {
850 seed->AddCalibObject(new AliTRDtrack(*pt/*, kTRUE*/));
856 AliInfo(Form("Number of loaded seeds: %d",nseed));
857 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
865 //_____________________________________________________________________________
866 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
869 // Starting from current position on track=t this function tries
870 // to extrapolate the track up to timeBin=0 and to confirm prolongation
871 // if a close cluster is found. Returns the number of clusters
872 // expected to be found in sensitive layers
873 // GeoManager used to estimate mean density
877 Int_t lastplane = GetLastPlane(&t);
880 Int_t expectedNumberOfClusters = 0;
882 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
884 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
885 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
887 // Propagate track close to the plane if neccessary
888 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
889 if (currentx < (-fgkMaxStep + t.GetX())) {
890 // Propagate closer to chamber - safety space fgkMaxStep
891 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
896 if (!AdjustSector(&t)) {
900 // Get material budget
908 // Starting global position
910 // End global position
911 x = fTrSec[0]->GetLayer(row0)->GetX();
912 if (!t.GetProlongation(x,y,z)) {
915 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
916 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
918 AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
919 xrho= param[0]*param[4];
920 xx0 = param[1]; // Get mean propagation parameters
922 // Flags for marking the track momentum and direction. The track is
923 // marked only if it has at least 1 cluster picked up in the current
925 Bool_t kUPDATED = kFALSE;
926 Bool_t kMARKED = kFALSE;
928 // Propagate and update
929 sector = t.GetSector();
930 //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
931 for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
933 // Mark track kinematics
934 if (itime > 10 && kUPDATED && !kMARKED) {
935 t.SetTrackSegmentDirMom(iplane);
939 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
940 expectedNumberOfClusters++;
941 t.SetNExpected(t.GetNExpected() + 1);
942 if (t.GetX() > 345.0) {
943 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
945 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
946 AliTRDcluster *cl = 0;
948 Double_t maxChi2 = fgkMaxChi2;
953 AliTRDcluster *cl0 = timeBin[0];
955 // No clusters in given time bin
959 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
960 if (plane > lastplane) {
964 Int_t timebin = cl0->GetLocalTimeBin();
965 AliTRDcluster *cl2 = GetCluster(&t,plane,timebin,index);
969 //Double_t h01 = GetTiltFactor(cl); //I.B's fix
970 //maxChi2=t.GetPredictedChi2(cl,h01);
975 //if (cl->GetNPads()<5)
976 Double_t dxsample = timeBin.GetdX();
977 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
978 Double_t h01 = GetTiltFactor(cl);
979 Int_t det = cl->GetDetector();
980 Int_t plane = fGeom->GetPlane(det);
982 if (t.GetX() > 345.0) {
983 t.SetNLast(t.GetNLast() + 1);
984 t.SetChi2Last(t.GetChi2Last() + maxChi2);
987 Double_t xcluster = cl->GetX();
988 t.PropagateTo(xcluster,xx0,xrho);
989 if (!AdjustSector(&t)) {
993 maxChi2 = t.GetPredictedChi2(cl,h01);
994 if (maxChi2 < 1e+10) {
995 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
999 //SetCluster(cl, GetNumberOfClusters()-1);
1012 return expectedNumberOfClusters;
1016 //_____________________________________________________________________________
1017 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
1020 // Starting from current radial position of track <t> this function
1021 // extrapolates the track up to the outer timebin and in the sensitive
1022 // layers confirms prolongation if a close cluster is found.
1023 // Returns the number of clusters expected to be found in sensitive layers
1024 // Uses the geomanager for material description
1026 // return number of assigned clusters ?
1032 Double_t xrho = 0.0;
1034 Float_t ratio0 = 0.0;
1036 Int_t expectedNumberOfClusters = 0;
1038 AliTRDtracklet tracklet;
1040 const Int_t kNclusters = 1000;
1041 Int_t clusters[kNclusters];
1042 for (Int_t i = 0; i < kNclusters; i++) {
1046 // Calibration fill 2D
1047 AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance();
1049 AliInfo("Could not get Calibra instance\n");
1051 if (calibra->GetMITracking()) {
1052 calibra->ResetTrack();
1055 // Loop through the TRD planes
1056 for (Int_t iplane = 0; iplane < AliESDtrack::kNPlane; iplane++) {
1058 Int_t hb = iplane * 10;
1059 fHClSearch->Fill(hb);
1061 // Get the global time bin numbers for the first an last
1062 // local time bin of the given plane
1063 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1064 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1066 // Get the X coordinates of the propagation layer for the first time bin
1067 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1068 if (currentx < t.GetX()) {
1069 fHClSearch->Fill(hb+1);
1073 // Propagate closer to the current chamber if neccessary
1074 if (currentx > (fgkMaxStep + t.GetX())) {
1075 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
1076 fHClSearch->Fill(hb+2);
1081 // Rotate track to adjacent sector if neccessary
1082 if (!AdjustSector(&t)) {
1083 fHClSearch->Fill(hb+3);
1087 // Check whether azimuthal angle is getting too large
1088 if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
1089 fHClSearch->Fill(hb+4);
1099 // Global start position (beginning of chamber)
1101 // X-position of the end of the chamber
1102 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1103 // Get local Y and Z at the X-position of the end of the chamber
1104 if (!t.GetProlongation(x,y,z)) {
1105 fHClSearch->Fill(hb+5);
1108 // Global end position (end of chamber)
1109 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1110 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1113 // Calculate the mean material budget along the path inside the chamber
1114 AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
1115 // The mean propagation parameters (density*length and radiation length)
1116 xrho = param[0]*param[4];
1119 // Find the clusters and tracklet along the path inside the chamber
1120 sector = t.GetSector();
1121 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1122 fHNCl->Fill(tracklet.GetN());
1124 // Discard if in less than 1/3 of the available timebins
1125 // clusters are found
1126 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
1127 fHClSearch->Fill(hb+6);
1130 //!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
1133 // Propagate and update track
1135 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1137 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1138 expectedNumberOfClusters++;
1139 t.SetNExpected(t.GetNExpected() + 1);
1140 if (t.GetX() > 345.0) {
1141 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1143 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1144 AliTRDcluster *cl = 0;
1146 Double_t maxChi2 = fgkMaxChi2;
1151 if (clusters[ilayer] > 0) {
1152 index = clusters[ilayer];
1153 cl = (AliTRDcluster *)GetCluster(index);
1154 //Double_t h01 = GetTiltFactor(cl); // I.B's fix
1155 //maxChi2=t.GetPredictedChi2(cl,h01); //
1160 //if (cl->GetNPads() < 5)
1161 Double_t dxsample = timeBin.GetdX();
1162 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1163 Double_t h01 = GetTiltFactor(cl);
1164 Int_t det = cl->GetDetector();
1165 Int_t plane = fGeom->GetPlane(det);
1166 if (t.GetX() > 345.0) {
1167 t.SetNLast(t.GetNLast() + 1);
1168 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1170 Double_t xcluster = cl->GetX();
1171 t.PropagateTo(xcluster,xx0,xrho);
1172 maxChi2 = t.GetPredictedChi2(cl,h01);
1175 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1176 if (!t.Update(cl,maxChi2,index,h01)) {
1179 } // else SetCluster(cl, GetNumberOfClusters()-1); // A.Bercuci 25.07.07
1182 if (calibra->GetMITracking()) {
1183 calibra->UpdateHistograms(cl,&t);
1186 // Reset material budget if 2 consecutive gold
1188 if ((t.GetTracklets(plane).GetN() + t.GetTracklets(plane-1).GetN()) > 20) {
1199 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1200 Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
1201 if ((tracklet.GetChi2() < 18.0) &&
1204 (ratio0+ratio1 > 1.5) &&
1205 (t.GetNCross() == 0) &&
1206 (TMath::Abs(t.GetSnp()) < 0.85) &&
1207 (t.GetNumberOfClusters() > 20)){
1208 //if (ratio0 > 0.8) {
1209 t.MakeBackupTrack(); // Make backup of the track until is gold
1214 return expectedNumberOfClusters;
1218 //_____________________________________________________________________________
1219 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1222 // Starting from current X-position of track <t> this function
1223 // extrapolates the track up to radial position <xToGo>.
1224 // Returns 1 if track reaches the plane, and 0 otherwise
1227 const Double_t kEpsilon = 0.00001;
1229 // Current track X-position
1230 Double_t xpos = t.GetX();
1232 // Direction: inward or outward
1233 Double_t dir = (xpos < xToGo) ? 1.0 : -1.0;
1235 while (((xToGo - xpos) * dir) > kEpsilon) {
1244 // The next step size
1245 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1247 // Get the global position of the starting point
1250 // X-position after next step
1253 // Get local Y and Z at the X-position of the next step
1254 if (!t.GetProlongation(x,y,z)) {
1255 return 0; // No prolongation possible
1258 // The global position of the end point of this prolongation step
1259 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1260 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1263 // Calculate the mean material budget between start and
1264 // end point of this prolongation step
1265 AliTracker::MeanMaterialBudget(xyz0,xyz1,param);
1267 // Propagate the track to the X-position after the next step
1268 if (!t.PropagateTo(x,param[1],param[0]*param[4])) {
1272 // Rotate the track if necessary
1275 // New track X-position
1284 //_____________________________________________________________________________
1285 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1288 // Fills clusters into TRD tracking_sectors
1289 // Note that the numbering scheme for the TRD tracking_sectors
1290 // differs from that of TRD sectors
1293 if (ReadClusters(fClusters,cTree)) {
1294 AliError("Problem with reading the clusters !");
1297 Int_t ncl = fClusters->GetEntriesFast();
1299 AliInfo(Form("Sorting %d clusters",ncl));
1304 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1305 Int_t detector = c->GetDetector();
1306 Int_t localTimeBin = c->GetLocalTimeBin();
1307 Int_t sector = fGeom->GetSector(detector);
1308 Int_t plane = fGeom->GetPlane(detector);
1309 Int_t trackingSector = sector;
1311 //if (c->GetQ() > 10) {
1312 // Int_t chamber = fGeom->GetChamber(detector);
1315 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1319 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1323 fHXCl->Fill(c->GetX());
1325 fTrSec[trackingSector]->GetLayer(layer)->SetX(c->GetX());
1326 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1334 //_____________________________________________________________________________
1335 void AliTRDtracker::UnloadClusters()
1338 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1344 nentr = fClusters->GetEntriesFast();
1345 for (i = 0; i < nentr; i++) {
1346 delete fClusters->RemoveAt(i);
1350 nentr = fSeeds->GetEntriesFast();
1351 for (i = 0; i < nentr; i++) {
1352 delete fSeeds->RemoveAt(i);
1355 nentr = fTracks->GetEntriesFast();
1356 for (i = 0; i < nentr; i++) {
1357 delete fTracks->RemoveAt(i);
1360 Int_t nsec = AliTRDgeometry::kNsect;
1361 for (i = 0; i < nsec; i++) {
1362 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1363 fTrSec[i]->GetLayer(pl)->Clear();
1369 //_____________________________________________________________________________
1370 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESDEvent *esd)
1373 // Creates seeds using clusters between position inner plane and outer plane
1376 const Double_t kMaxTheta = 1.0;
1377 const Double_t kMaxPhi = 2.0;
1379 const Double_t kRoad0y = 6.0; // Road for middle cluster
1380 const Double_t kRoad0z = 8.5; // Road for middle cluster
1382 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1383 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1385 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1386 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1387 const Int_t kMaxSeed = 3000;
1389 Int_t maxSec = AliTRDgeometry::kNsect;
1391 // Linear fitters in planes
1392 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1393 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1394 fitterTC.StoreData(kTRUE);
1395 fitterT2.StoreData(kTRUE);
1396 AliRieman rieman(1000); // Rieman fitter
1397 AliRieman rieman2(1000); // Rieman fitter
1399 // Find the maximal and minimal layer for the planes
1401 AliTRDpropagationLayer *reflayers[6];
1402 for (Int_t i = 0; i < 6; i++) {
1403 layers[i][0] = 10000;
1406 for (Int_t ns = 0; ns < maxSec; ns++) {
1407 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1408 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(ilayer));
1412 Int_t det = layer[0]->GetDetector();
1413 Int_t plane = fGeom->GetPlane(det);
1414 if (ilayer < layers[plane][0]) {
1415 layers[plane][0] = ilayer;
1417 if (ilayer > layers[plane][1]) {
1418 layers[plane][1] = ilayer;
1423 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(0,0);
1424 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1425 Double_t hL[6]; // Tilting angle
1426 Double_t xcl[6]; // X - position of reference cluster
1427 Double_t ycl[6]; // Y - position of reference cluster
1428 Double_t zcl[6]; // Z - position of reference cluster
1430 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1431 Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
1433 Double_t chi2R = 0.0;
1434 Double_t chi2Z = 0.0;
1435 Double_t chi2RF = 0.0;
1436 Double_t chi2ZF = 0.0;
1438 Int_t nclusters; // Total number of clusters
1439 for (Int_t i = 0; i < 6; i++) {
1447 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1448 AliTRDseed *seed[kMaxSeed];
1449 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1450 seed[iseed]= &pseed[iseed*6];
1452 AliTRDseed *cseed = seed[0];
1454 Double_t seedquality[kMaxSeed];
1455 Double_t seedquality2[kMaxSeed];
1456 Double_t seedparams[kMaxSeed][7];
1457 Int_t seedlayer[kMaxSeed];
1458 Int_t registered = 0;
1459 Int_t sort[kMaxSeed];
1464 for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
1465 //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
1467 registered = 0; // Reset registerd seed counter
1468 cseed = seed[registered];
1471 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1472 //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
1475 Int_t dseed = 5 + Int_t(iter) * 3;
1477 // Initialize seeding layers
1478 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1479 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1480 xcl[ilayer] = reflayers[ilayer]->GetX();
1483 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1484 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1485 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1486 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1487 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1489 Int_t maxn3 = layer3;
1490 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1492 AliTRDcluster *cl3 = layer3[icl3];
1496 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
1497 ycl[sLayer+3] = cl3->GetY();
1498 zcl[sLayer+3] = cl3->GetZ();
1499 Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1500 Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1501 Int_t maxn0 = layer0;
1503 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1505 AliTRDcluster *cl0 = layer0[icl0];
1509 if (cl3->IsUsed() && cl0->IsUsed()) {
1512 ycl[sLayer+0] = cl0->GetY();
1513 zcl[sLayer+0] = cl0->GetZ();
1514 if (ycl[sLayer+0] > yymax0) {
1517 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1518 if (TMath::Abs(tanphi) > kMaxPhi) {
1521 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1522 if (TMath::Abs(tantheta) > kMaxTheta) {
1525 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
1527 // Expected position in 1 layer
1528 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
1529 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
1530 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1531 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1532 Int_t maxn1 = layer1;
1534 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1536 AliTRDcluster *cl1 = layer1[icl1];
1541 if (cl3->IsUsed()) nusedCl++;
1542 if (cl0->IsUsed()) nusedCl++;
1543 if (cl1->IsUsed()) nusedCl++;
1547 ycl[sLayer+1] = cl1->GetY();
1548 zcl[sLayer+1] = cl1->GetZ();
1549 if (ycl[sLayer+1] > yymax1) {
1552 if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
1555 if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
1558 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
1560 Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
1561 Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
1562 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1566 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1567 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
1568 ycl[sLayer+2] = cl2->GetY();
1569 zcl[sLayer+2] = cl2->GetZ();
1570 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
1575 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1576 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1577 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1578 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1582 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1583 cseed[iLayer].Reset();
1588 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1589 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1590 chi2Z += (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer])
1591 * (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer]);
1592 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1593 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1594 chi2R += (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer])
1595 * (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer]);
1596 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1598 if (TMath::Sqrt(chi2R) > 1.0/iter) {
1601 if (TMath::Sqrt(chi2Z) > 7.0/iter) {
1605 Float_t minmax[2] = { -100.0, 100.0 };
1606 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1607 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
1608 + 1.0 - cseed[sLayer+iLayer].GetZref(0);
1609 if (max < minmax[1]) {
1612 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
1613 - 1.0 - cseed[sLayer+iLayer].GetZref(0);
1614 if (min > minmax[0]) {
1619 Bool_t isFake = kFALSE;
1620 if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
1623 if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
1626 if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
1630 if (AliTRDReconstructor::StreamLevel() > 0) {
1631 if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
1632 TTreeSRedirector &cstream = *fDebugStreamer;
1634 << "isFake=" << isFake
1640 << "X0=" << xcl[sLayer+0]
1641 << "X1=" << xcl[sLayer+1]
1642 << "X2=" << xcl[sLayer+2]
1643 << "X3=" << xcl[sLayer+3]
1644 << "Y2exp=" << y2exp
1645 << "Z2exp=" << z2exp
1646 << "Chi2R=" << chi2R
1647 << "Chi2Z=" << chi2Z
1648 << "Seed0.=" << &cseed[sLayer+0]
1649 << "Seed1.=" << &cseed[sLayer+1]
1650 << "Seed2.=" << &cseed[sLayer+2]
1651 << "Seed3.=" << &cseed[sLayer+3]
1652 << "Zmin=" << minmax[0]
1653 << "Zmax=" << minmax[1]
1658 ////////////////////////////////////////////////////////////////////////////////////
1662 ////////////////////////////////////////////////////////////////////////////////////
1668 Bool_t isOK = kTRUE;
1670 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1672 cseed[sLayer+jLayer].SetTilt(hL[sLayer+jLayer]);
1673 cseed[sLayer+jLayer].SetPadLength(padlength[sLayer+jLayer]);
1674 cseed[sLayer+jLayer].SetX0(xcl[sLayer+jLayer]);
1676 for (Int_t iter = 0; iter < 2; iter++) {
1679 // In iteration 0 we try only one pad-row
1680 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1682 AliTRDseed tseed = cseed[sLayer+jLayer];
1683 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1685 roadz = padlength[sLayer+jLayer];
1688 Float_t quality = 10000.0;
1690 for (Int_t iTime = 2; iTime < 20; iTime++) {
1692 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1693 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1694 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1697 // Try 2 pad-rows in second iteration
1698 zexp = tseed.GetZref(0) + tseed.GetZref(1) * dxlayer;
1699 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1700 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
1702 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1703 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
1707 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1708 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1712 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1714 tseed.SetIndexes(iTime,index);
1715 tseed.SetClusters(iTime,cl); // Register cluster
1716 tseed.SetX(iTime,dxlayer); // Register cluster
1717 tseed.SetY(iTime,cl->GetY()); // Register cluster
1718 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1724 // Count the number of clusters and distortions into quality
1725 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1726 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1727 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1728 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1729 if ((iter == 0) && tseed.IsOK()) {
1730 cseed[sLayer+jLayer] = tseed;
1736 if (tseed.IsOK() && (tquality < quality)) {
1737 cseed[sLayer+jLayer] = tseed;
1742 if (!cseed[sLayer+jLayer].IsOK()) {
1747 cseed[sLayer+jLayer].CookLabels();
1748 cseed[sLayer+jLayer].UpdateUsed();
1749 nusedCl += cseed[sLayer+jLayer].GetNUsed();
1761 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1762 if (cseed[sLayer+iLayer].IsOK()) {
1763 nclusters += cseed[sLayer+iLayer].GetN2();
1769 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1770 rieman.AddPoint(xcl[sLayer+iLayer]
1771 ,cseed[sLayer+iLayer].GetYfitR(0)
1772 ,cseed[sLayer+iLayer].GetZProb()
1781 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1782 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1783 chi2R += (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0))
1784 * (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0));
1785 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1786 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1787 chi2Z += (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz())
1788 * (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz());
1789 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1791 Double_t curv = rieman.GetC();
1796 Double_t sumda = TMath::Abs(cseed[sLayer+0].GetYfitR(1) - cseed[sLayer+0].GetYref(1))
1797 + TMath::Abs(cseed[sLayer+1].GetYfitR(1) - cseed[sLayer+1].GetYref(1))
1798 + TMath::Abs(cseed[sLayer+2].GetYfitR(1) - cseed[sLayer+2].GetYref(1))
1799 + TMath::Abs(cseed[sLayer+3].GetYfitR(1) - cseed[sLayer+3].GetYref(1));
1800 Double_t likea = TMath::Exp(-sumda*10.6);
1801 Double_t likechi2 = 0.0000000001;
1803 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1805 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1806 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1807 Double_t like = likea * likechi2 * likechi2z * likeN;
1808 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetYref(1) - 130.0*curv) * 1.9);
1809 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetZref(1)
1810 - cseed[sLayer+0].GetZref(0) / xcl[sLayer+0]) * 5.9);
1811 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1813 seedquality[registered] = like;
1814 seedlayer[registered] = sLayer;
1815 if (TMath::Log(0.000000000000001 + like) < -15) {
1818 AliTRDseed seedb[6];
1819 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1820 seedb[iLayer] = cseed[iLayer];
1823 ////////////////////////////////////////////////////////////////////////////////////
1825 // Full track fit part
1827 ////////////////////////////////////////////////////////////////////////////////////
1834 // Add new layers - avoid long extrapolation
1836 Int_t tLayer[2] = { 0, 0 };
1850 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1851 Int_t jLayer = tLayer[iLayer]; // Set tracking layer
1852 cseed[jLayer].Reset();
1853 cseed[jLayer].SetTilt(hL[jLayer]);
1854 cseed[jLayer].SetPadLength(padlength[jLayer]);
1855 cseed[jLayer].SetX0(xcl[jLayer]);
1856 // Get pad length and rough cluster
1857 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].GetYref(0)
1858 ,cseed[jLayer].GetZref(0)
1861 if (indexdummy <= 0) {
1864 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
1865 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
1867 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
1869 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1871 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1872 if ((jLayer == 0) && !(cseed[1].IsOK())) {
1873 continue; // break not allowed
1875 if ((jLayer == 5) && !(cseed[4].IsOK())) {
1876 continue; // break not allowed
1878 Float_t zexp = cseed[jLayer].GetZref(0);
1879 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
1881 for (Int_t iter = 0; iter < 2; iter++) {
1883 AliTRDseed tseed = cseed[jLayer];
1884 Float_t quality = 10000.0;
1886 for (Int_t iTime = 2; iTime < 20; iTime++) {
1887 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
1888 Double_t dxlayer = layer.GetX()-xcl[jLayer];
1889 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1890 Float_t yroad = kRoad1y;
1891 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
1895 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1896 tseed.SetIndexes(iTime,index);
1897 tseed.SetClusters(iTime,cl); // Register cluster
1898 tseed.SetX(iTime,dxlayer); // Register cluster
1899 tseed.SetY(iTime,cl->GetY()); // Register cluster
1900 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1905 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1906 Float_t tquality = (18.0 - tseed.GetN2())/2.0 + TMath::Abs(dangle) / 0.1
1907 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1908 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1909 if (tquality < quality) {
1910 cseed[jLayer] = tseed;
1919 if ( cseed[jLayer].IsOK()) {
1920 cseed[jLayer].CookLabels();
1921 cseed[jLayer].UpdateUsed();
1922 nusedf += cseed[jLayer].GetNUsed();
1923 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
1929 AliTRDseed bseed[6];
1930 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1931 bseed[jLayer] = cseed[jLayer];
1933 Float_t lastquality = 10000.0;
1934 Float_t lastchi2 = 10000.0;
1935 Float_t chi2 = 1000.0;
1937 for (Int_t iter = 0; iter < 4; iter++) {
1939 // Sort tracklets according "quality", try to "improve" 4 worst
1940 Float_t sumquality = 0.0;
1941 Float_t squality[6];
1942 Int_t sortindexes[6];
1944 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1945 if (bseed[jLayer].IsOK()) {
1946 AliTRDseed &tseed = bseed[jLayer];
1947 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
1948 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1949 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1950 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
1951 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1952 squality[jLayer] = tquality;
1955 squality[jLayer] = -1.0;
1957 sumquality +=squality[jLayer];
1960 if ((sumquality >= lastquality) ||
1961 (chi2 > lastchi2)) {
1964 lastquality = sumquality;
1967 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1968 cseed[jLayer] = bseed[jLayer];
1971 TMath::Sort(6,squality,sortindexes,kFALSE);
1973 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
1975 Int_t bLayer = sortindexes[jLayer];
1976 AliTRDseed tseed = bseed[bLayer];
1978 for (Int_t iTime = 2; iTime < 20; iTime++) {
1980 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
1981 Double_t dxlayer = layer.GetX() - xcl[bLayer];
1982 Double_t zexp = tseed.GetZref(0);
1983 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
1984 Float_t roadz = padlength[bLayer] + 1;
1985 if (TMath::Abs(tseed.GetZProb() - zexp) > 0.5*padlength[bLayer]) {
1986 roadz = padlength[bLayer] * 0.5;
1988 if (tseed.GetZfit(1)*tseed.GetZref(1) < 0.0) {
1989 roadz = padlength[bLayer] * 0.5;
1991 if (TMath::Abs(tseed.GetZProb() - zexp) < 0.1*padlength[bLayer]) {
1992 zexp = tseed.GetZProb();
1993 roadz = padlength[bLayer] * 0.5;
1996 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer - zcor;
1997 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
2001 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2003 tseed.SetIndexes(iTime,index);
2004 tseed.SetClusters(iTime,cl); // Register cluster
2005 tseed.SetX(iTime,dxlayer); // Register cluster
2006 tseed.SetY(iTime,cl->GetY()); // Register cluster
2007 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2013 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2014 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2015 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0
2016 + TMath::Abs(dangle) / 0.1
2017 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2018 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2019 if (tquality<squality[bLayer]) {
2020 bseed[bLayer] = tseed;
2026 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
2033 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2034 if (TMath::Abs(cseed[iLayer].GetYref(0) / cseed[iLayer].GetX0()) < 0.15) {
2037 if (cseed[iLayer].IsOK()) {
2038 nclusters += cseed[iLayer].GetN2();
2046 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2047 if (cseed[iLayer].IsOK()) {
2048 rieman.AddPoint(xcl[iLayer]
2049 ,cseed[iLayer].GetYfitR(0)
2050 ,cseed[iLayer].GetZProb()
2059 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2060 if (cseed[iLayer].IsOK()) {
2061 cseed[iLayer].SetYref(0,rieman.GetYat(xcl[iLayer]));
2062 chi2RF += (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0))
2063 * (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0));
2064 cseed[iLayer].SetYref(1,rieman.GetDYat(xcl[iLayer]));
2065 cseed[iLayer].SetZref(0,rieman.GetZat(xcl[iLayer]));
2066 chi2ZF += (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz())
2067 * (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz());
2068 cseed[iLayer].SetZref(1,rieman.GetDZat(xcl[iLayer]));
2071 chi2RF /= TMath::Max((nlayers - 3.0),1.0);
2072 chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
2073 curv = rieman.GetC();
2075 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
2076 Double_t dzmf = rieman.GetDZat(xref2);
2077 Double_t zmf = rieman.GetZat(xref2);
2083 fitterTC.ClearPoints();
2084 fitterT2.ClearPoints();
2087 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2089 if (!cseed[iLayer].IsOK()) {
2093 for (Int_t itime = 0; itime < 25; itime++) {
2095 if (!cseed[iLayer].IsUsable(itime)) {
2098 // X relative to the middle chamber
2099 Double_t x = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0() - xref2;
2100 Double_t y = cseed[iLayer].GetY(itime);
2101 Double_t z = cseed[iLayer].GetZ(itime);
2102 // ExB correction to the correction
2106 Double_t x2 = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0();
2107 Double_t t = 1.0 / (x2*x2 + y*y);
2109 uvt[0] = 2.0 * x2 * uvt[1]; // u
2110 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
2111 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
2112 uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
2113 Double_t error = 2.0 * 0.2 * uvt[1];
2114 fitterT2.AddPoint(uvt,uvt[4],error);
2117 // Constrained rieman
2119 z = cseed[iLayer].GetZ(itime);
2120 uvt[0] = 2.0 * x2 * t; // u
2121 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
2122 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
2123 fitterTC.AddPoint(uvt,uvt[2],error);
2124 rieman2.AddPoint(x2,y,z,1,10);
2134 Double_t rpolz0 = fitterT2.GetParameter(3);
2135 Double_t rpolz1 = fitterT2.GetParameter(4);
2138 // Linear fitter - not possible to make boundaries
2139 // Do not accept non possible z and dzdx combinations
2141 Bool_t acceptablez = kTRUE;
2142 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2143 if (cseed[iLayer].IsOK()) {
2144 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2145 if (TMath::Abs(cseed[iLayer].GetZProb() - zT2) > padlength[iLayer] * 0.5 + 1.0) {
2146 acceptablez = kFALSE;
2151 fitterT2.FixParameter(3,zmf);
2152 fitterT2.FixParameter(4,dzmf);
2154 fitterT2.ReleaseParameter(3);
2155 fitterT2.ReleaseParameter(4);
2156 rpolz0 = fitterT2.GetParameter(3);
2157 rpolz1 = fitterT2.GetParameter(4);
2160 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2161 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2162 Double_t polz1c = fitterTC.GetParameter(2);
2163 Double_t polz0c = polz1c * xref2;
2164 Double_t aC = fitterTC.GetParameter(0);
2165 Double_t bC = fitterTC.GetParameter(1);
2166 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2167 Double_t aR = fitterT2.GetParameter(0);
2168 Double_t bR = fitterT2.GetParameter(1);
2169 Double_t dR = fitterT2.GetParameter(2);
2170 Double_t cR = 1.0 + bR*bR - dR*aR;
2173 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2174 cR = aR / TMath::Sqrt(cR);
2177 Double_t chi2ZT2 = 0.0;
2178 Double_t chi2ZTC = 0.0;
2179 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2180 if (cseed[iLayer].IsOK()) {
2181 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2182 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2183 chi2ZT2 += TMath::Abs(cseed[iLayer].GetMeanz() - zT2);
2184 chi2ZTC += TMath::Abs(cseed[iLayer].GetMeanz() - zTC);
2187 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2188 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2190 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2191 Float_t sumdaf = 0.0;
2192 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2193 if (cseed[iLayer].IsOK()) {
2194 sumdaf += TMath::Abs((cseed[iLayer].GetYfit(1) - cseed[iLayer].GetYref(1))
2195 / cseed[iLayer].GetSigmaY2());
2198 sumdaf /= Float_t (nlayers - 2.0);
2201 // Likelihoods for full track
2203 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2204 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2205 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2206 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2207 seedquality2[registered] = likezf * likechi2TR * likeaf;
2209 // Still needed ????
2210 // Bool_t isGold = kFALSE;
2212 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2213 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2214 // if (isGold &&nusedf<10){
2215 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2216 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2217 // seed[index][jLayer].UseClusters(); //sign gold
2222 if (!cseed[0].IsOK()) {
2224 if (!cseed[1].IsOK()) {
2228 seedparams[registered][0] = cseed[index0].GetX0();
2229 seedparams[registered][1] = cseed[index0].GetYref(0);
2230 seedparams[registered][2] = cseed[index0].GetZref(0);
2231 seedparams[registered][5] = cR;
2232 seedparams[registered][3] = cseed[index0].GetX0() * cR - TMath::Sin(TMath::ATan(cseed[0].GetYref(1)));
2233 seedparams[registered][4] = cseed[index0].GetZref(1)
2234 / TMath::Sqrt(1.0 + cseed[index0].GetYref(1) * cseed[index0].GetYref(1));
2235 seedparams[registered][6] = ns;
2240 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2241 if (!cseed[iLayer].IsOK()) {
2244 if (cseed[iLayer].GetLabels(0) >= 0) {
2245 labels[nlab] = cseed[iLayer].GetLabels(0);
2248 if (cseed[iLayer].GetLabels(1) >= 0) {
2249 labels[nlab] = cseed[iLayer].GetLabels(1);
2253 Freq(nlab,labels,outlab,kFALSE);
2254 Int_t label = outlab[0];
2255 Int_t frequency = outlab[1];
2256 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2257 cseed[iLayer].SetFreq(frequency);
2258 cseed[iLayer].SetC(cR);
2259 cseed[iLayer].SetCC(cC);
2260 cseed[iLayer].SetChi2(chi2TR);
2261 cseed[iLayer].SetChi2Z(chi2ZF);
2265 if (1 || (!isFake)) {
2266 Float_t zvertex = GetZ();
2267 TTreeSRedirector &cstream = *fDebugStreamer;
2268 if (AliTRDReconstructor::StreamLevel() > 0) {
2270 << "isFake=" << isFake
2271 << "Vertex=" << zvertex
2272 << "Rieman2.=" << &rieman2
2273 << "Rieman.=" << &rieman
2281 << "Chi2R=" << chi2R
2282 << "Chi2Z=" << chi2Z
2283 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2284 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2285 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2286 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2287 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2288 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2289 << "C=" << curv // Non constrained - no tilt correction
2290 << "DR=" << dR // DR parameter - tilt correction
2291 << "DCA=" << dca // DCA - tilt correction
2292 << "CR=" << cR // Non constrained curvature - tilt correction
2293 << "CC=" << cC // Constrained curvature
2294 << "Polz0=" << polz0c
2295 << "Polz1=" << polz1c
2296 << "RPolz0=" << rpolz0
2297 << "RPolz1=" << rpolz1
2298 << "Ncl=" << nclusters
2299 << "Nlayers=" << nlayers
2300 << "NUsedS=" << nusedCl
2301 << "NUsed=" << nusedf
2302 << "Findable=" << findable
2304 << "LikePrim=" << likePrim
2305 << "Likechi2C=" << likechi2C
2306 << "Likechi2TR=" << likechi2TR
2307 << "Likezf=" << likezf
2308 << "LikeF=" << seedquality2[registered]
2309 << "S0.=" << &cseed[0]
2310 << "S1.=" << &cseed[1]
2311 << "S2.=" << &cseed[2]
2312 << "S3.=" << &cseed[3]
2313 << "S4.=" << &cseed[4]
2314 << "S5.=" << &cseed[5]
2315 << "SB0.=" << &seedb[0]
2316 << "SB1.=" << &seedb[1]
2317 << "SB2.=" << &seedb[2]
2318 << "SB3.=" << &seedb[3]
2319 << "SB4.=" << &seedb[4]
2320 << "SB5.=" << &seedb[5]
2321 << "Label=" << label
2322 << "Freq=" << frequency
2323 << "sLayer=" << sLayer
2328 if (registered<kMaxSeed - 1) {
2330 cseed = seed[registered];
2333 } // End of loop over layer 1
2335 } // End of loop over layer 0
2337 } // End of loop over layer 3
2339 } // End of loop over seeding time bins
2345 TMath::Sort(registered,seedquality2,sort,kTRUE);
2346 Bool_t signedseed[kMaxSeed];
2347 for (Int_t i = 0; i < registered; i++) {
2348 signedseed[i] = kFALSE;
2351 for (Int_t iter = 0; iter < 5; iter++) {
2353 for (Int_t iseed = 0; iseed < registered; iseed++) {
2355 Int_t index = sort[iseed];
2356 if (signedseed[index]) {
2359 Int_t labelsall[1000];
2360 Int_t nlabelsall = 0;
2361 Int_t naccepted = 0;;
2362 Int_t sLayer = seedlayer[index];
2368 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2370 if (TMath::Abs(seed[index][jLayer].GetYref(0) / xcl[jLayer]) < 0.15) {
2373 if (seed[index][jLayer].IsOK()) {
2374 seed[index][jLayer].UpdateUsed();
2375 ncl +=seed[index][jLayer].GetN2();
2376 nused +=seed[index][jLayer].GetNUsed();
2379 for (Int_t itime = 0; itime < 25; itime++) {
2380 if (seed[index][jLayer].IsUsable(itime)) {
2382 for (Int_t ilab = 0; ilab < 3; ilab++) {
2383 Int_t tindex = seed[index][jLayer].GetClusters(itime)->GetLabel(ilab);
2385 labelsall[nlabelsall] = tindex;
2403 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2409 if (nlayers < findable) {
2412 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
2418 if ((nlayers == findable) ||
2422 if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
2428 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2434 if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
2439 signedseed[index] = kTRUE;
2444 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2445 if (seed[index][iLayer].IsOK()) {
2446 if (seed[index][iLayer].GetLabels(0) >= 0) {
2447 labels[nlab] = seed[index][iLayer].GetLabels(0);
2450 if (seed[index][iLayer].GetLabels(1) >= 0) {
2451 labels[nlab] = seed[index][iLayer].GetLabels(1);
2456 Freq(nlab,labels,outlab,kFALSE);
2457 Int_t label = outlab[0];
2458 Int_t frequency = outlab[1];
2459 Freq(nlabelsall,labelsall,outlab,kFALSE);
2460 Int_t label1 = outlab[0];
2461 Int_t label2 = outlab[2];
2462 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2463 Float_t ratio = Float_t(nused) / Float_t(ncl);
2465 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2466 if ((seed[index][jLayer].IsOK()) &&
2467 (TMath::Abs(seed[index][jLayer].GetYfit(1) - seed[index][jLayer].GetYfit(1)) < 0.2)) {
2468 seed[index][jLayer].UseClusters(); // Sign gold
2473 Int_t eventNrInFile = esd->GetEventNumberInFile(); // This is most likely NOT the event number you'd like to use. It has nothing to do with the 'real' event number.
2474 TTreeSRedirector &cstream = *fDebugStreamer;
2479 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2485 AliESDtrack esdtrack;
2486 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2487 esdtrack.SetLabel(label);
2488 esd->AddTrack(&esdtrack);
2489 TTreeSRedirector &cstream = *fDebugStreamer;
2490 if (AliTRDReconstructor::StreamLevel() > 0) {
2492 << "EventNrInFile=" << eventNrInFile
2493 << "ESD.=" << &esdtrack
2495 << "trdback.=" << track
2500 if (AliTRDReconstructor::StreamLevel() > 0) {
2503 << "Track.=" << track
2504 << "Like=" << seedquality[index]
2505 << "LikeF=" << seedquality2[index]
2506 << "S0.=" << &seed[index][0]
2507 << "S1.=" << &seed[index][1]
2508 << "S2.=" << &seed[index][2]
2509 << "S3.=" << &seed[index][3]
2510 << "S4.=" << &seed[index][4]
2511 << "S5.=" << &seed[index][5]
2512 << "Label=" << label
2513 << "Label1=" << label1
2514 << "Label2=" << label2
2515 << "FakeRatio=" << fakeratio
2516 << "Freq=" << frequency
2518 << "Nlayers=" << nlayers
2519 << "Findable=" << findable
2520 << "NUsed=" << nused
2521 << "sLayer=" << sLayer
2522 << "EventNrInFile=" << eventNrInFile
2530 } // End of loop over sectors
2536 //_____________________________________________________________________________
2537 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *clusterTree) const
2540 // Reads AliTRDclusters from the file.
2541 // The names of the cluster tree and branches
2542 // should match the ones used in AliTRDclusterizer::WriteClusters()
2545 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2546 TObjArray *clusterArray = new TObjArray(nsize+1000);
2548 TBranch *branch = clusterTree->GetBranch("TRDcluster");
2550 AliError("Can't get the branch !");
2553 branch->SetAddress(&clusterArray);
2555 // Loop through all entries in the tree
2556 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2558 AliTRDcluster *c = 0;
2559 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2562 nbytes += clusterTree->GetEvent(iEntry);
2564 // Get the number of points in the detector
2565 Int_t nCluster = clusterArray->GetEntriesFast();
2567 // Loop through all TRD digits
2568 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2569 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2570 AliTRDcluster *co = c;
2572 clusterArray->RemoveAt(iCluster);
2577 delete clusterArray;
2583 //_____________________________________________________________________________
2584 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2587 // Get track space point with index i
2588 // Origin: C.Cheshkov
2591 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2592 Int_t idet = cl->GetDetector();
2593 Int_t isector = fGeom->GetSector(idet);
2594 Int_t ichamber = fGeom->GetChamber(idet);
2595 Int_t iplan = fGeom->GetPlane(idet);
2597 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2598 local[1] = cl->GetY();
2599 local[2] = cl->GetZ();
2601 fGeom->RotateBack(idet,local,global);
2602 p.SetXYZ(global[0],global[1],global[2]);
2603 AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
2606 iLayer = AliGeomManager::kTRD1;
2609 iLayer = AliGeomManager::kTRD2;
2612 iLayer = AliGeomManager::kTRD3;
2615 iLayer = AliGeomManager::kTRD4;
2618 iLayer = AliGeomManager::kTRD5;
2621 iLayer = AliGeomManager::kTRD6;
2624 Int_t modId = isector * fGeom->Ncham() + ichamber;
2625 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
2626 p.SetVolumeID(volid);
2632 //_____________________________________________________________________________
2633 void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
2636 // This cooks a label. Mmmmh, smells good...
2639 Int_t label = 123456789;
2643 Int_t ncl = pt->GetNumberOfClusters();
2645 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2649 Int_t **s = new Int_t* [kRange];
2650 for (i = 0; i < kRange; i++) {
2651 s[i] = new Int_t[2];
2653 for (i = 0; i < kRange; i++) {
2662 for (i = 0; i < ncl; i++) {
2663 index = pt->GetClusterIndex(i);
2664 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2670 for (i = 0; i < ncl; i++) {
2671 index = pt->GetClusterIndex(i);
2672 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2673 for (Int_t k = 0; k < 3; k++) {
2674 label = c->GetLabel(k);
2675 labelAdded = kFALSE;
2678 while ((!labelAdded) && (j < kRange)) {
2679 if ((s[j][0] == label) ||
2682 s[j][1] = s[j][1] + 1;
2694 for (i = 0; i < kRange; i++) {
2695 if (s[i][1] > max) {
2701 for (i = 0; i < kRange; i++) {
2707 if ((1.0 - Float_t(max)/ncl) > wrong) {
2711 pt->SetLabel(label);
2715 //_____________________________________________________________________________
2716 void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
2719 // Use clusters, but don't abuse them!
2722 const Float_t kmaxchi2 = 18;
2723 const Float_t kmincl = 10;
2725 AliTRDtrack *track = (AliTRDtrack *) t;
2727 Int_t ncl = t->GetNumberOfClusters();
2728 for (Int_t i = from; i < ncl; i++) {
2729 Int_t index = t->GetClusterIndex(i);
2730 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2731 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2732 if (track->GetTracklets(iplane).GetChi2() > kmaxchi2) {
2735 if (track->GetTracklets(iplane).GetN() < kmincl) {
2738 if (!(c->IsUsed())) {
2745 //_____________________________________________________________________________
2746 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2749 // Parametrised "expected" error of the cluster reconstruction in Y
2752 Double_t s = 0.08 * 0.08;
2757 //_____________________________________________________________________________
2758 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2761 // Parametrised "expected" error of the cluster reconstruction in Z
2764 Double_t s = 9.0 * 9.0 / 12.0;
2769 //_____________________________________________________________________________
2770 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2773 // Returns radial position which corresponds to time bin <localTB>
2774 // in tracking sector <sector> and plane <plane>
2777 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2778 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2780 return fTrSec[sector]->GetLayer(pl)->GetX();
2784 //_____________________________________________________________________________
2785 AliTRDtracker::AliTRDpropagationLayer
2786 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2787 , Double_t radLength, Int_t tbIndex, Int_t plane)
2796 ,fTimeBinIndex(tbIndex)
2809 // AliTRDpropagationLayer constructor
2812 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2817 if (fTimeBinIndex >= 0) {
2818 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2819 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2822 for (Int_t i = 0; i < 5; i++) {
2823 fIsHole[i] = kFALSE;
2828 //_____________________________________________________________________________
2829 void AliTRDtracker::AliTRDpropagationLayer
2830 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2831 , Double_t radLength, Double_t Yc, Double_t Zc)
2834 // Sets hole in the layer
2843 fHoleX0 = radLength;
2847 //_____________________________________________________________________________
2848 AliTRDtracker::AliTRDtrackingSector
2849 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
2855 // AliTRDtrackingSector Constructor
2858 AliTRDpadPlane *padPlane = 0;
2859 AliTRDpropagationLayer *ppl = 0;
2861 // Get holes description from geometry
2862 Bool_t holes[AliTRDgeometry::kNcham];
2863 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
2864 holes[icham] = fGeom->IsHole(0,icham,gs);
2867 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
2868 fTimeBinIndex[i] = -1;
2876 // Add layers for each of the planes
2877 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2878 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2880 const Int_t kNchambers = AliTRDgeometry::Ncham();
2883 Double_t ymaxsensitive = 0;
2884 Double_t *zc = new Double_t[kNchambers];
2885 Double_t *zmax = new Double_t[kNchambers];
2886 Double_t *zmaxsensitive = new Double_t[kNchambers];
2888 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
2890 ymax = fGeom->GetChamberWidth(plane) / 2.0;
2891 padPlane = fGeom->GetPadPlane(plane,0);
2892 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
2894 for (Int_t ch = 0; ch < kNchambers; ch++) {
2895 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
2896 Float_t pad = padPlane->GetRowSize(1);
2897 Float_t row0 = fGeom->GetRow0(plane,ch,0);
2898 Int_t nPads = fGeom->GetRowMax(plane,ch,0);
2899 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
2900 zc[ch] = -(pad * nPads) / 2.0 + row0;
2903 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
2904 / AliTRDCommonParam::Instance()->GetSamplingFrequency();
2905 rho = 0.00295 * 0.85; //????
2908 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
2909 //Double_t xbottom = x0 - dxDrift;
2910 //Double_t xtop = x0 + dxAmp;
2912 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2913 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
2915 Double_t xlayer = iTime * dx - dxAmp;
2916 //if (xlayer<0) xlayer = dxAmp / 2.0;
2919 tbIndex = CookTimeBinIndex(plane,iTime);
2920 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
2921 ppl->SetYmax(ymax,ymaxsensitive);
2922 ppl->SetZ(zc,zmax,zmaxsensitive);
2923 ppl->SetHoles(holes);
2934 delete [] zmaxsensitive;
2938 //_____________________________________________________________________________
2939 AliTRDtracker::AliTRDtrackingSector
2940 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
2951 //_____________________________________________________________________________
2952 AliTRDtracker::AliTRDtrackingSector
2953 ::~AliTRDtrackingSector()
2959 for (Int_t i = 0; i < fN; i++) {
2965 //_____________________________________________________________________________
2966 Int_t AliTRDtracker::AliTRDtrackingSector
2967 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
2970 // Depending on the digitization parameters calculates global
2971 // (i.e. for a whole TRD stack of 6 planes) time bin index for
2972 // timebin <localTB> in plane <plane>
2975 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2976 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
2988 //_____________________________________________________________________________
2989 void AliTRDtracker::AliTRDtrackingSector
2990 ::MapTimeBinLayers()
2993 // For all sensitive time bins sets corresponding layer index
2994 // in the array fTimeBins
2999 for (Int_t i = 0; i < fN; i++) {
3001 index = fLayers[i]->GetTimeBinIndex();
3006 if (index >= (Int_t) kMaxTimeBinIndex) {
3007 //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
3008 // ,index,kMaxTimeBinIndex-1));
3012 fTimeBinIndex[index] = i;
3018 //_____________________________________________________________________________
3019 Int_t AliTRDtracker::AliTRDtrackingSector
3020 ::GetLayerNumber(Double_t x) const
3023 // Returns the number of time bin which in radial position is closest to <x>
3026 if (x >= fLayers[fN-1]->GetX()) {
3029 if (x <= fLayers[ 0]->GetX()) {
3035 Int_t m = (b + e) / 2;
3037 for ( ; b < e; m = (b + e) / 2) {
3038 if (x > fLayers[m]->GetX()) {
3046 if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
3055 //_____________________________________________________________________________
3056 Int_t AliTRDtracker::AliTRDtrackingSector
3057 ::GetInnerTimeBin() const
3060 // Returns number of the innermost SENSITIVE propagation layer
3063 return GetLayerNumber(0);
3067 //_____________________________________________________________________________
3068 Int_t AliTRDtracker::AliTRDtrackingSector
3069 ::GetOuterTimeBin() const
3072 // Returns number of the outermost SENSITIVE time bin
3075 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3079 //_____________________________________________________________________________
3080 Int_t AliTRDtracker::AliTRDtrackingSector
3081 ::GetNumberOfTimeBins() const
3084 // Returns number of SENSITIVE time bins
3090 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
3091 layer = GetLayerNumber(tb);
3101 //_____________________________________________________________________________
3102 void AliTRDtracker::AliTRDtrackingSector
3103 ::InsertLayer(AliTRDpropagationLayer *pl)
3106 // Insert layer <pl> in fLayers array.
3107 // Layers are sorted according to X coordinate.
3110 if (fN == ((Int_t) kMaxLayersPerSector)) {
3111 //AliWarning("Too many layers !\n");
3120 Int_t i = Find(pl->GetX());
3122 memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3129 //_____________________________________________________________________________
3130 Int_t AliTRDtracker::AliTRDtrackingSector
3131 ::Find(Double_t x) const
3134 // Returns index of the propagation layer nearest to X
3137 if (x <= fLayers[0]->GetX()) {
3141 if (x > fLayers[fN-1]->GetX()) {
3147 Int_t m = (b + e) / 2;
3149 for (; b < e; m = (b + e) / 2) {
3150 if (x > fLayers[m]->GetX()) {
3162 //_____________________________________________________________________________
3163 void AliTRDtracker::AliTRDpropagationLayer
3164 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3167 // set centers and the width of sectors
3170 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3171 fZc[icham] = center[icham];
3172 fZmax[icham] = w[icham];
3173 fZmaxSensitive[icham] = wsensitive[icham];
3178 //_____________________________________________________________________________
3179 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3182 // set centers and the width of sectors
3187 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3188 fIsHole[icham] = holes[icham];
3196 //_____________________________________________________________________________
3197 void AliTRDtracker::AliTRDpropagationLayer
3198 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3201 // Insert cluster in cluster array.
3202 // Clusters are sorted according to Y coordinate.
3205 if (fTimeBinIndex < 0) {
3206 //AliWarning("Attempt to insert cluster into non-sensitive time bin!\n");
3210 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3211 //AliWarning("Too many clusters !\n");
3217 fClusters[fN++] = c;
3221 Int_t i = Find(c->GetY());
3222 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3223 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3230 //_____________________________________________________________________________
3231 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3234 // Returns index of the cluster nearest in Y
3240 if (y <= fClusters[0]->GetY()) {
3243 if (y > fClusters[fN-1]->GetY()) {
3249 Int_t m = (b + e) / 2;
3251 for ( ; b < e; m = (b + e) / 2) {
3252 if (y > fClusters[m]->GetY()) {
3264 //_____________________________________________________________________________
3265 Int_t AliTRDtracker::AliTRDpropagationLayer
3266 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3267 , Float_t maxroadz) const
3270 // Returns index of the cluster nearest to the given y,z
3275 Float_t mindist = maxroad;
3277 for (Int_t i = Find(y-maxroad); i < maxn; i++) {
3278 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3279 Float_t ycl = c->GetY();
3280 if (ycl > (y + maxroad)) {
3283 if (TMath::Abs(c->GetZ() - z) > maxroadz) {
3286 if (TMath::Abs(ycl - y) < mindist) {
3287 mindist = TMath::Abs(ycl - y);
3296 //_____________________________________________________________________________
3297 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
3300 // Returns correction factor for tilted pads geometry
3303 Int_t det = c->GetDetector();
3304 Int_t plane = fGeom->GetPlane(det);
3305 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(plane,0);
3306 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3317 //_____________________________________________________________________________
3318 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3319 , AliTRDtrack *track
3321 , AliTRDtracklet &tracklet)
3324 // Try to find the nearest clusters to the track in the time bins
3325 // between <t0> and <t1>.
3326 // Also the corresponding tracklet is calculated
3327 // Correction coeficients - depend on TRD parameters - to be changed accordingly
3330 const Int_t kN1 = 100;
3331 const Int_t kN2 = 10;
3339 Double_t dz[kN2][kN1];
3340 Double_t dy[kN2][kN1];
3341 Int_t indexes[kN2][kN1]; // Indexes of the clusters in the road
3342 Int_t best[kN2][kN1]; // Index of best matching cluster
3343 AliTRDcluster *cl[kN2][kN1]; // Pointers to the clusters in the road
3345 Double_t xmean = 0.0; // Reference x
3348 // Initialize the arrays
3349 for (Int_t it = 0; it < kN1; it++) {
3358 for (Int_t ih = 0; ih < kN2; ih++) {
3359 indexes[ih][it] = -2;
3361 dz[ih][it] = -100.0;
3362 dy[ih][it] = -100.0;
3368 Double_t x0 = track->GetX();
3369 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3374 Int_t detector = -1;
3375 Float_t padlength = 0.0;
3377 AliTRDtrack track2(* track);
3378 Float_t snpy = track->GetSnp();
3379 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3384 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetSignedPt());
3385 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3386 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3391 for (Int_t it = 0; it < t1-t0; it++) {
3393 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3394 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
3396 continue; // No indexes1
3399 Int_t maxn = timeBin;
3400 x[it] = timeBin.GetX();
3401 track2.PropagateTo(x[it]);
3402 yt[it] = track2.GetY();
3403 zt[it] = track2.GetZ();
3405 Double_t y = yt[it];
3406 Double_t z = zt[it];
3407 Double_t chi2 = 1000000.0;
3411 // Find 2 nearest cluster at given time bin
3413 Int_t checkPoint[4] = { 0, 0, 0, 0 };
3414 Double_t minY = 123456789.0;
3415 Double_t minD[2] = { 1.0, 1.0 };
3417 for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
3419 AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
3420 h01 = GetTiltFactor(c);
3422 Int_t det = c->GetDetector();
3423 plane = fGeom->GetPlane(det);
3424 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3427 if (c->GetY() > (y + road)) {
3431 fHDeltaX->Fill(c->GetX() - x[it]);
3433 if (TMath::Abs(c->GetY()-y) < TMath::Abs(minY)) {
3434 minY = c->GetY() - y;
3435 minD[0] = c->GetY() - y;
3436 minD[1] = c->GetZ() - z;
3441 fHMinZ->Fill(c->GetZ() - z);
3442 if ((c->GetZ() - z) * (c->GetZ() - z) > 2 * (12.0 * sz2)) {
3447 Double_t dist = TMath::Abs(c->GetZ() - z);
3448 if (dist > (0.5 * padlength + 6.0 * sigmaz)) {
3449 continue; // 6 sigma boundary cut
3453 // Sigma boundary cost function
3454 Double_t cost = 0.0;
3455 if (dist> (0.5 * padlength - sigmaz)){
3456 cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
3458 cost = (cost + 1.0) * (cost + 1.0);
3464 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3467 if (chi2 > maxChi2[1]) {
3472 // Store the clusters in the road
3473 detector = c->GetDetector();
3474 for (Int_t ih = 2; ih < 9; ih++) {
3475 if (cl[ih][it] == 0) {
3477 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3482 if (chi2 < maxChi2[0]) {
3483 maxChi2[1] = maxChi2[0];
3485 indexes[1][it] = indexes[0][it];
3486 cl[1][it] = cl[0][it];
3487 indexes[0][it] = timeBin.GetIndex(i);
3493 indexes[1][it] = timeBin.GetIndex(i);
3497 for(int iCheckPoint = 0; iCheckPoint<4; iCheckPoint++) {
3498 fHFindCl[iCheckPoint]->Fill(checkPoint[iCheckPoint]);
3501 if (checkPoint[3]) {
3502 if (track->GetSignedPt() > 0) {
3503 fHMinYPos->Fill(minY);
3506 fHMinYNeg->Fill(minY);
3508 fHMinD->Fill(minD[0],minD[1]);
3521 xmean /= Float_t(nfound); // Middle x
3522 track2.PropagateTo(xmean); // Propagate track to the center
3525 // Choose one of the variants
3529 Double_t sumdy = 0.0;
3530 Double_t sumdy2 = 0.0;
3531 Double_t sumx = 0.0;
3532 Double_t sumxy = 0.0;
3533 Double_t sumx2 = 0.0;
3534 Double_t mpads = 0.0;
3541 Double_t meanz[kN2];
3542 Double_t moffset[kN2]; // Mean offset
3543 Double_t mean[kN2]; // Mean value
3544 Double_t angle[kN2]; // Angle
3546 Double_t smoffset[kN2]; // Sigma of mean offset
3547 Double_t smean[kN2]; // Sigma of mean value
3548 Double_t sangle[kN2]; // Sigma of angle
3549 Double_t smeanangle[kN2]; // Correlation
3551 Double_t sigmas[kN2];
3552 Double_t tchi2s[kN2]; // Chi2s for tracklet
3554 for (Int_t it = 0; it < kN2; it++) {
3560 moffset[it] = 0.0; // Mean offset
3561 mean[it] = 0.0; // Mean value
3562 angle[it] = 0.0; // Angle
3564 smoffset[it] = 1.0e5; // Sigma of mean offset
3565 smean[it] = 1.0e5; // Sigma of mean value
3566 sangle[it] = 1.0e5; // Sigma of angle
3567 smeanangle[it] = 0.0; // Correlation
3570 tchi2s[it] = 1.0e5; // Chi2s for tracklet
3577 for (Int_t it = 0; it < t1 - t0; it++) {
3581 for (Int_t dt = -3; dt <= 3; dt++) {
3585 if (it+dt > t1-t0) {
3588 if (!cl[0][it+dt]) {
3591 zmean[it] += cl[0][it+dt]->GetZ();
3594 zmean[it] /= nmean[it];
3597 for (Int_t it = 0; it < t1 - t0; it++) {
3601 for (Int_t ih = 0; ih < 10; ih++) {
3602 dz[ih][it] = -100.0;
3603 dy[ih][it] = -100.0;
3607 Double_t xcluster = cl[ih][it]->GetX();
3610 track2.GetProlongation(xcluster,ytrack,ztrack );
3611 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
3612 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
3619 if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
3621 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
3629 // Iterative choice of "best path"
3631 Int_t label = TMath::Abs(track->GetLabel());
3634 for (Int_t iter = 0; iter < 9; iter++) {
3649 for (Int_t it = 0; it < t1 - t0; it++) {
3651 if (!cl[best[iter][it]][it]) {
3655 // Calculates pad-row changes
3656 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3657 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3658 for (Int_t itd = it - 1; itd >= 0; itd--) {
3659 if (cl[best[iter][itd]][itd]) {
3660 zbefore = cl[best[iter][itd]][itd]->GetZ();
3664 for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
3665 if (cl[best[iter][itd]][itd]) {
3666 zafter = cl[best[iter][itd]][itd]->GetZ();
3670 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
3671 (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
3675 // Distance to reference x
3676 Double_t dx = x[it]-xmean;
3677 sumz += cl[best[iter][it]][it]->GetZ();
3679 sumdy += dy[best[iter][it]][it];
3680 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3683 sumxy += dx*dy[best[iter][it]][it];
3684 mpads += cl[best[iter][it]][it]->GetNPads();
3685 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3686 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3687 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3697 // Calculates line parameters
3699 Double_t det = sum*sumx2 - sumx*sumx;
3700 angle[iter] = (sum*sumxy - sumx*sumdy) / det;
3701 mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
3702 meanz[iter] = sumz / sum;
3703 moffset[iter] = sumdy / sum;
3704 mpads /= sum; // Mean number of pads
3706 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3707 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3709 for (Int_t it = 0; it < t1 - t0; it++) {
3710 if (!cl[best[iter][it]][it]) {
3713 Double_t dx = x[it] - xmean;
3714 Double_t ytr = mean[iter] + angle[iter] * dx;
3715 sigma2 += (dy[best[iter][it]][it] - ytr)
3716 * (dy[best[iter][it]][it] - ytr);
3717 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3718 * (dy[best[iter][it]][it] - moffset[iter]);
3721 sigma2 /= (sum - 2); // Normalized residuals
3722 sigma1 /= (sum - 1); // Normalized residuals
3723 smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
3724 sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
3725 smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
3726 sigmas[iter] = TMath::Sqrt(sigma1);
3727 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3730 // Iterative choice of "better path"
3732 for (Int_t it = 0; it < t1 - t0; it++) {
3734 if (!cl[best[iter][it]][it]) {
3738 // Add unisochronity + angular effect contribution
3739 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3740 Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
3741 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3742 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3743 Double_t mindist = 100000.0;
3746 for (Int_t ih = 0; ih < kN2; ih++) {
3750 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3751 dist2 *= dist2; // Chi2 distance
3752 if (dist2 < mindist) {
3758 best[iter+1][it] = ihbest;
3763 // Update best hypothesy if better chi2 according tracklet position and angle
3765 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3766 Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
3767 Double_t say = track->GetSigmaSnpY(); // track->fCey;
3769 Double_t detchi = sy2*sa2 - say*say;
3770 Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
3772 Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
3773 + angle[bestiter] * angle[bestiter] * invers[1]
3774 + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
3775 Double_t chi21 = mean[iter] * mean[iter] * invers[0]
3776 + angle[iter] * angle[iter] * invers[1]
3777 + 2.0 * mean[iter] * angle[iter] * invers[2];
3778 tchi2s[iter] = chi21;
3780 if ((changes[iter] <= changes[bestiter]) &&
3790 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
3791 Short_t maxpos = -1;
3792 Float_t maxcharge = 0.0;
3793 Short_t maxpos4 = -1;
3794 Float_t maxcharge4 = 0.0;
3795 Short_t maxpos5 = -1;
3796 Float_t maxcharge5 = 0.0;
3798 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
3799 ,-AliTracker::GetBz()*0.1);
3800 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
3802 expectederr += (mpads - 3.5) * 0.04;
3804 if (changes[bestiter] > 1) {
3805 expectederr += changes[bestiter] * 0.01;
3807 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
3809 for (Int_t it = 0; it < t1 - t0; it++) {
3811 if (!cl[best[bestiter][it]][it]) {
3815 // Set cluster error
3816 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr);
3817 if (!cl[best[bestiter][it]][it]->IsUsed()) {
3818 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
3821 // Time bins with maximal charge
3822 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
3823 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3824 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3827 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3828 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3829 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3830 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3834 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3835 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3836 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3837 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3841 // Time bins with maximal charge
3842 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
3843 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3844 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3847 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3848 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3849 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3850 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3854 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3855 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3856 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3857 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3861 clusters[it+t0] = indexes[best[bestiter][it]][it];
3865 // Set tracklet parameters
3866 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
3868 trackleterr2 += (mpads - 3.5) * 0.04;
3870 trackleterr2 += changes[bestiter] * 0.01;
3871 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
3872 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
3875 ,track2.GetY() + moffset[bestiter]
3879 tracklet.SetTilt(h01);
3880 tracklet.SetP0(mean[bestiter]);
3881 tracklet.SetP1(angle[bestiter]);
3882 tracklet.SetN(nfound);
3883 tracklet.SetNCross(changes[bestiter]);
3884 tracklet.SetPlane(plane);
3885 tracklet.SetSigma2(expectederr);
3886 tracklet.SetChi2(tchi2s[bestiter]);
3887 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
3888 track->SetTracklets(plane,tracklet);
3889 track->SetNWrong(track->GetNWrong() + nbad[0]);
3894 TClonesArray array0("AliTRDcluster");
3895 TClonesArray array1("AliTRDcluster");
3896 array0.ExpandCreateFast(t1 - t0 + 1);
3897 array1.ExpandCreateFast(t1 - t0 + 1);
3898 TTreeSRedirector &cstream = *fDebugStreamer;
3899 AliTRDcluster dummy;
3903 for (Int_t it = 0; it < t1 - t0; it++) {
3904 dy0[it] = dy[0][it];
3905 dyb[it] = dy[best[bestiter][it]][it];
3907 new(array0[it]) AliTRDcluster(*cl[0][it]);
3910 new(array0[it]) AliTRDcluster(dummy);
3912 if(cl[best[bestiter][it]][it]) {
3913 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
3916 new(array1[it]) AliTRDcluster(dummy);
3920 TGraph graph0(t1-t0,x,dy0);
3921 TGraph graph1(t1-t0,x,dyb);
3922 TGraph graphy(t1-t0,x,yt);
3923 TGraph graphz(t1-t0,x,zt);
3925 if (AliTRDReconstructor::StreamLevel() > 0) {
3926 cstream << "tracklet"
3927 << "track.=" << track // Track parameters
3928 << "tany=" << tany // Tangent of the local track angle
3929 << "xmean=" << xmean // Xmean - reference x of tracklet
3930 << "tilt=" << h01 // Tilt angle
3931 << "nall=" << nall // Number of foundable clusters
3932 << "nfound=" << nfound // Number of found clusters
3933 << "clfound=" << clfound // Total number of found clusters in road
3934 << "mpads=" << mpads // Mean number of pads per cluster
3935 << "plane=" << plane // Plane number
3936 << "detector=" << detector // Detector number
3937 << "road=" << road // The width of the used road
3938 << "graph0.=" << &graph0 // x - y = dy for closest cluster
3939 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
3940 << "graphy.=" << &graphy // y position of the track
3941 << "graphz.=" << &graphz // z position of the track
3942 //<< "fCl.=" << &array0 // closest cluster
3943 //<< "fCl2.=" << &array1 // second closest cluster
3944 << "maxpos=" << maxpos // Maximal charge postion
3945 << "maxcharge=" << maxcharge // Maximal charge
3946 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
3947 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
3948 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
3949 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
3950 << "bestiter=" << bestiter // Best iteration number
3951 << "tracklet.=" << &tracklet // Corrspond to the best iteration
3952 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
3953 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
3954 << "sigmas0=" << sigmas[0] // Residuals sigma
3955 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
3956 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
3957 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
3958 << "ngoodb=" << ngood[bestiter] // in best iteration
3959 << "nbadb=" << nbad[bestiter] // in best iteration
3960 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
3961 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
3962 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
3963 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
3964 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
3965 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
3966 << "mean0=" << mean[0] // Mean dy in iter=0;
3967 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
3968 << "meanb=" << mean[bestiter] // Mean dy in iter=best
3969 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
3970 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
3971 << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
3972 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
3973 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
3974 << "expectederr=" << expectederr // Expected error of cluster position
3982 //_____________________________________________________________________________
3983 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
3984 , Int_t *outlist, Bool_t down)
3987 // Sort eleements according occurancy
3988 // The size of output array has is 2*n
3995 Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
3996 Int_t *sindexF = new Int_t[2*n];
3997 for (Int_t i = 0; i < n; i++) {
4001 TMath::Sort(n,inlist,sindexS,down);
4003 Int_t last = inlist[sindexS[0]];
4006 sindexF[0+n] = last;
4010 for (Int_t i = 1; i < n; i++) {
4011 val = inlist[sindexS[i]];
4013 sindexF[countPos]++;
4017 sindexF[countPos+n] = val;
4018 sindexF[countPos]++;
4026 // Sort according frequency
4027 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
4029 for (Int_t i = 0; i < countPos; i++) {
4030 outlist[2*i ] = sindexF[sindexS[i]+n];
4031 outlist[2*i+1] = sindexF[sindexS[i]];
4041 //_____________________________________________________________________________
4042 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
4048 Double_t alpha = AliTRDgeometry::GetAlpha();
4049 Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
4053 c[ 1] = 0.0; c[ 2] = 2.0;
4054 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
4055 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
4056 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4059 AliTRDcluster *cl = 0;
4061 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
4062 if (seeds[ilayer].IsOK()) {
4063 for (Int_t itime = 22; itime > 0; itime--) {
4064 if (seeds[ilayer].GetIndexes(itime) > 0) {
4065 index = seeds[ilayer].GetIndexes(itime);
4066 cl = seeds[ilayer].GetClusters(itime);
4079 AliTRDtrack *track = new AliTRDtrack(cl
4084 ,params[6]*alpha+shift);
4085 // SetCluster(cl, 0); // A. Bercuci
4086 track->PropagateTo(params[0]-5.0);
4087 track->ResetCovariance(1);
4089 Int_t rc = FollowBackProlongation(*track);
4096 track->CookdEdxTimBin(-1);
4097 CookLabel(track,0.9);
4104 //_____________________________________________________________________________
4105 void AliTRDtracker::InitLogHists()
4108 // Create the log histograms
4111 fHBackfit = new TH1D("logTRD_backfit" ,""
4113 fHRefit = new TH1D("logTRD_refit" ,""
4115 fHClSearch = new TH1D("logTRD_clSearch",""
4118 fHX = new TH1D("logTRD_X" ,";x (cm)"
4120 fHNCl = new TH1D("logTRD_ncl" ,""
4122 fHNClTrack = new TH1D("logTRD_nclTrack",""
4125 fHMinYPos = new TH1D("logTRD_minYPos" ,";#delta Y (cm)"
4127 fHMinYNeg = new TH1D("logTRD_minYNeg" ,";#delta Y (cm)"
4129 fHMinZ = new TH1D("logTRD_minZ" ,";#delta Z (cm)"
4131 fHMinD = new TH2D("logTRD_minD" ,";#delta Y (cm);#delta Z (cm)"
4135 fHDeltaX = new TH1D("logTRD_deltaX" ,";#delta X (cm)"
4137 fHXCl = new TH1D("logTRD_xCl" ,";cluster x position (cm)"
4140 const Char_t *nameFindCl[4] = { "logTRD_clY"
4145 for (Int_t i = 0; i < 4; i++) {
4146 fHFindCl[i] = new TH1D(nameFindCl[i],"",30,-0.5,29.5);
4151 //_____________________________________________________________________________
4152 void AliTRDtracker::SaveLogHists()
4155 // Save the log histograms in AliESDs.root
4158 TDirectory *sav = gDirectory;
4161 TSeqCollection *col = gROOT->GetListOfFiles();
4162 Int_t nn = col->GetEntries();
4163 for (Int_t i = 0; i < nn; i++) {
4164 logFile = (TFile *) col->At(i);
4165 if (strstr(logFile->GetName(),"AliESDs.root")) {
4172 fHBackfit->Write(fHBackfit->GetName(),TObject::kOverwrite);
4173 fHRefit->Write(fHRefit->GetName(),TObject::kOverwrite);
4174 fHClSearch->Write(fHClSearch->GetName(),TObject::kOverwrite);
4175 fHX->Write(fHX->GetName(),TObject::kOverwrite);
4176 fHNCl->Write(fHNCl->GetName(),TObject::kOverwrite);
4177 fHNClTrack->Write(fHNClTrack->GetName(),TObject::kOverwrite);
4179 fHMinYPos->Write(fHMinYPos->GetName(),TObject::kOverwrite);
4180 fHMinYNeg->Write(fHMinYNeg->GetName(),TObject::kOverwrite);
4181 fHMinD->Write(fHMinD->GetName(),TObject::kOverwrite);
4182 fHMinZ->Write(fHMinZ->GetName(),TObject::kOverwrite);
4184 fHDeltaX->Write(fHDeltaX->GetName(),TObject::kOverwrite);
4185 fHXCl->Write(fHXCl->GetName(),TObject::kOverwrite);
4187 for (Int_t i = 0; i < 4; i++) {
4188 fHFindCl[i]->Write(fHFindCl[i]->GetName(),TObject::kOverwrite);