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 ///////////////////////////////////////////////////////////////////////////////
30 #include <Riostream.h>
36 #include <TLinearFitter.h>
37 #include <TObjArray.h>
40 #include <TTreeStream.h>
43 #include "AliAlignObj.h"
44 #include "AliRieman.h"
45 #include "AliTrackPointArray.h"
47 #include "AliTRDgeometry.h"
48 #include "AliTRDpadPlane.h"
49 #include "AliTRDgeometry.h"
50 #include "AliTRDcluster.h"
51 #include "AliTRDtrack.h"
52 #include "AliTRDseed.h"
53 #include "AliTRDcalibDB.h"
54 #include "AliTRDCommonParam.h"
55 #include "AliTRDtracker.h"
56 #include "AliTRDReconstructor.h"
57 #include "AliTRDCalibra.h"
58 ClassImp(AliTRDtracker)
60 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
61 const Float_t AliTRDtracker::fgkLabelFraction = 0.8; // ??
62 const Double_t AliTRDtracker::fgkMaxChi2 = 12.0;
63 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Corresponds to tan = 3
64 const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
66 //_____________________________________________________________________________
67 AliTRDtracker::AliTRDtracker()
94 // Default constructor
97 for (Int_t i = 0; i < kTrackingSectors; i++) {
100 for (Int_t j = 0; j < 5; j++) {
101 for (Int_t k = 0; k < 18; k++) {
102 fHoles[j][k] = kFALSE;
110 //_____________________________________________________________________________
111 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
132 ,fTimeBinsPerPlane(0)
133 ,fAddTRDseeds(kFALSE)
143 //_____________________________________________________________________________
144 AliTRDtracker::AliTRDtracker(const TFile *geomfile)
160 ,fClusters(new TObjArray(2000))
162 ,fSeeds(new TObjArray(2000))
164 ,fTracks(new TObjArray(1000))
165 ,fTimeBinsPerPlane(0)
166 ,fAddTRDseeds(kFALSE)
174 TDirectory *savedir = gDirectory;
175 TFile *in = (TFile *) geomfile;
178 AliWarning("geometry file is not open!\n");
179 AliWarning("FULL TRD geometry and DEFAULT TRD parameter will be used\n");
183 fGeom = (AliTRDgeometry *) in->Get("TRDgeometry");
187 AliWarning("Cannot find TRD geometry!\n");
188 fGeom = new AliTRDgeometry();
190 fGeom->ReadGeoMatrices();
194 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
196 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
197 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
198 fHoles[icham][trS] = fGeom->IsHole(0,icham,geomS);
202 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
203 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
204 if (tiltAngle < 0.1) {
208 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
210 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
218 //_____________________________________________________________________________
219 AliTRDtracker::~AliTRDtracker()
222 // Destructor of AliTRDtracker
242 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
243 delete fTrSec[geomS];
246 if (fDebugStreamer) {
247 delete fDebugStreamer;
252 //_____________________________________________________________________________
253 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
256 // Transform internal TRD ID to global detector ID
259 Int_t isector = fGeom->GetSector(lid);
260 Int_t ichamber = fGeom->GetChamber(lid);
261 Int_t iplan = fGeom->GetPlane(lid);
263 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
266 iLayer = AliAlignObj::kTRD1;
269 iLayer = AliAlignObj::kTRD2;
272 iLayer = AliAlignObj::kTRD3;
275 iLayer = AliAlignObj::kTRD4;
278 iLayer = AliAlignObj::kTRD5;
281 iLayer = AliAlignObj::kTRD6;
285 Int_t modId = isector * fGeom->Ncham() + ichamber;
286 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
292 //_____________________________________________________________________________
293 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
296 // Transform global detector ID to local detector ID
300 AliAlignObj::ELayerID layerId = AliAlignObj::VolUIDToLayer(gid,modId);
302 Int_t isector = modId / fGeom->Ncham();
303 Int_t ichamber = modId % fGeom->Ncham();
307 case AliAlignObj::kTRD1:
310 case AliAlignObj::kTRD2:
313 case AliAlignObj::kTRD3:
316 case AliAlignObj::kTRD4:
319 case AliAlignObj::kTRD5:
322 case AliAlignObj::kTRD6:
333 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
339 //_____________________________________________________________________________
340 Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
343 // Transform something ... whatever ...
346 // Magic constants for geo manager transformation
347 const Double_t kX0shift = 2.52;
348 const Double_t kX0shift5 = 3.05;
351 // Apply alignment and calibration to transform cluster
353 Int_t detector = cluster->GetDetector();
354 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
355 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
356 Int_t sector = fGeom->GetSector(cluster->GetDetector());
358 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
359 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.0); // Drift distance
364 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
365 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
367 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
368 AliTRDpadPlane *padPlane = commonParam->GetPadPlane(plane,chamber);
369 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
370 Double_t localPos[3];
371 Double_t localPosTracker[3];
372 localPos[0] = -cluster->GetX();
373 localPos[1] = cluster->GetY() - driftX * exB;
374 localPos[2] = cluster->GetZ() - zshiftIdeal;
376 cluster->SetY(cluster->GetY() - driftX*exB);
377 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
378 cluster->SetX(xplane- cluster->GetX());
380 TGeoHMatrix *matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
382 // No matrix found - if somebody used geometry with holes
383 AliError("Invalid Geometry - Default Geometry used\n");
386 matrix->LocalToMaster(localPos,localPosTracker);
388 if (AliTRDReconstructor::StreamLevel() > 1) {
389 (* fDebugStreamer) << "Transform"
391 << "matrix.=" << matrix
392 << "Detector=" << detector
393 << "Sector=" << sector
395 << "Chamber=" << chamber
396 << "lx0=" << localPosTracker[0]
397 << "ly0=" << localPosTracker[1]
398 << "lz0=" << localPosTracker[2]
403 cluster->SetX(localPosTracker[0]+kX0shift5);
406 cluster->SetX(localPosTracker[0]+kX0shift);
409 cluster->SetY(localPosTracker[1]);
410 cluster->SetZ(localPosTracker[2]);
416 //_____________________________________________________________________________
417 // Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
420 // // Is this still needed ????
422 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
423 // const Double_t kTime0Cor = 0.32; // time0 correction
425 // const Double_t kX0shift = 2.52;
426 // const Double_t kX0shift5 = 3.05;
429 // // apply alignment and calibration to transform cluster
432 // Int_t detector = cluster->GetDetector();
433 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
434 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
435 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
437 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
438 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
442 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
443 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
446 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
447 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
448 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
449 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
450 // localPos[2] = -cluster->GetX();
451 // localPos[0] = cluster->GetY() - driftX*exB;
452 // localPos[1] = cluster->GetZ() -zshiftIdeal;
453 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
454 // matrix->LocalToMaster(localPos, globalPos);
456 // Double_t sectorAngle = 20.*(sector%18)+10;
457 // TGeoHMatrix rotSector;
458 // rotSector.RotateZ(sectorAngle);
459 // rotSector.LocalToMaster(globalPos, localPosTracker);
462 // TGeoHMatrix matrix2(*matrix);
463 // matrix2.MultiplyLeft(&rotSector);
464 // matrix2.LocalToMaster(localPos,localPosTracker2);
468 // cluster->SetY(cluster->GetY() - driftX*exB);
469 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
470 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
471 // (*fDebugStreamer)<<"Transform"<<
473 // "matrix.="<<matrix<<
474 // "matrix2.="<<&matrix2<<
475 // "Detector="<<detector<<
476 // "Sector="<<sector<<
478 // "Chamber="<<chamber<<
479 // "lx0="<<localPosTracker[0]<<
480 // "ly0="<<localPosTracker[1]<<
481 // "lz0="<<localPosTracker[2]<<
482 // "lx2="<<localPosTracker2[0]<<
483 // "ly2="<<localPosTracker2[1]<<
484 // "lz2="<<localPosTracker2[2]<<
488 // cluster->SetX(localPosTracker[0]+kX0shift5);
490 // cluster->SetX(localPosTracker[0]+kX0shift);
492 // cluster->SetY(localPosTracker[1]);
493 // cluster->SetZ(localPosTracker[2]);
497 //_____________________________________________________________________________
498 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
501 // Rotates the track when necessary
504 Double_t alpha = AliTRDgeometry::GetAlpha();
505 Double_t y = track->GetY();
506 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
508 // Is this still needed ????
509 //Int_t ns = AliTRDgeometry::kNsect;
510 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
514 if (!track->Rotate( alpha)) {
518 else if (y < -ymax) {
520 if (!track->Rotate(-alpha)) {
529 //_____________________________________________________________________________
530 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
531 , Int_t timebin, UInt_t &index)
534 // Try to find cluster in the backup list
537 AliTRDcluster *cl =0;
538 Int_t *indexes = track->GetBackupIndexes();
540 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
541 if (indexes[i] == 0) {
544 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
548 if (cli->GetLocalTimeBin() != timebin) {
551 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
552 if (iplane == plane) {
563 //_____________________________________________________________________________
564 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
567 // Return last updated plane
571 Int_t *indexes = track->GetBackupIndexes();
573 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
574 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
578 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
579 if (iplane > lastplane) {
588 //_____________________________________________________________________________
589 Int_t AliTRDtracker::Clusters2Tracks(AliESD *event)
592 // Finds tracks within the TRD. The ESD event is expected to contain seeds
593 // at the outer part of the TRD. The seeds
594 // are found within the TRD if fAddTRDseeds is TRUE.
595 // The tracks are propagated to the innermost time bin
596 // of the TRD and the ESD event is updated
599 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
600 Float_t foundMin = fgkMinClustersInTrack * timeBins;
603 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
605 Int_t n = event->GetNumberOfTracks();
606 for (Int_t i = 0; i < n; i++) {
608 AliESDtrack *seed = event->GetTrack(i);
609 ULong_t status = seed->GetStatus();
610 if ((status & AliESDtrack::kTRDout) == 0) {
613 if ((status & AliESDtrack::kTRDin) != 0) {
618 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
619 //seed2->ResetCovariance();
620 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
621 AliTRDtrack &t = *pt;
622 FollowProlongation(t);
623 if (t.GetNumberOfClusters() >= foundMin) {
625 CookLabel(pt,1 - fgkLabelFraction);
630 Double_t xTPC = 250.0;
631 if (PropagateToX(t,xTPC,fgkMaxStep)) {
632 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
639 AliInfo(Form("Number of loaded seeds: %d",nseed));
640 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
641 AliInfo(Form("Total number of found tracks: %d",found));
647 //_____________________________________________________________________________
648 Int_t AliTRDtracker::PropagateBack(AliESD *event)
651 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
652 // backpropagated by the TPC tracker. Each seed is first propagated
653 // to the TRD, and then its prolongation is searched in the TRD.
654 // If sufficiently long continuation of the track is found in the TRD
655 // the track is updated, otherwise it's stored as originaly defined
656 // by the TPC tracker.
659 Int_t found = 0; // number of tracks found
660 Float_t foundMin = 20.0;
661 Int_t n = event->GetNumberOfTracks();
664 Float_t *quality = new Float_t[n];
665 Int_t *index = new Int_t[n];
666 for (Int_t i = 0; i < n; i++) {
667 AliESDtrack *seed = event->GetTrack(i);
668 Double_t covariance[15];
669 seed->GetExternalCovariance(covariance);
670 quality[i] = covariance[0]+covariance[2];
671 //quality[i] = covariance[0];
673 TMath::Sort(n,quality,index,kFALSE);
675 for (Int_t i = 0; i < n; i++) {
677 //AliESDtrack *seed = event->GetTrack(i);
678 AliESDtrack *seed = event->GetTrack(index[i]);
681 ULong_t status = seed->GetStatus();
682 if ((status & AliESDtrack::kTPCout) == 0) {
687 if ((status & AliESDtrack::kTRDout) != 0) {
692 Int_t lbl = seed->GetLabel();
693 AliTRDtrack *track = new AliTRDtrack(*seed);
694 track->SetSeedLabel(lbl);
695 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
697 Float_t p4 = track->GetC();
698 Int_t expectedClr = FollowBackProlongation(*track);
701 fHX->Fill(track->GetX());
704 // store the last measurement
706 fHNClTrack->Fill(track->GetNumberOfClusters());
707 if (track->GetNumberOfClusters() >= foundMin) {
711 CookdEdxTimBin(*track);
712 CookLabel(track,1 - fgkLabelFraction);
713 if (track->GetBackupTrack()) {
714 //fHBackfit->Fill(5);
715 UseClusters(track->GetBackupTrack());
716 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
722 // inter-tracks competition ???
723 if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
724 (TMath::Abs(track->GetPt()) > 0.8)) {
729 // Make backup for back propagation
732 Int_t foundClr = track->GetNumberOfClusters();
733 if (foundClr >= foundMin) {
735 CookdEdxTimBin(*track);
736 CookLabel(track,1 - fgkLabelFraction);
737 if (track->GetBackupTrack()) {
738 UseClusters(track->GetBackupTrack());
741 // Sign only gold tracks
742 if (track->GetChi2() / track->GetNumberOfClusters() < 4) {
743 if ((seed->GetKinkIndex(0) == 0) &&
744 (TMath::Abs(track->GetPt()) < 1.5)) {
748 Bool_t isGold = kFALSE;
751 if (track->GetChi2() / track->GetNumberOfClusters() < 5) {
752 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
753 if (track->GetBackupTrack()) {
754 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
763 (track->GetNCross() == 0) &&
764 (track->GetChi2() / track->GetNumberOfClusters() < 7)) {
765 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
766 if (track->GetBackupTrack()) {
767 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
773 (track->GetBackupTrack())) {
774 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
775 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
776 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
781 if ((track->StatusForTOF() > 0) &&
782 (track->GetNCross() == 0) &&
783 (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) {
784 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
792 // Debug part of tracking
793 TTreeSRedirector &cstream = *fDebugStreamer;
794 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.
795 if (AliTRDReconstructor::StreamLevel() > 0) {
796 if (track->GetBackupTrack()) {
798 << "EventNrInFile=" << eventNrInFile
801 << "trdback.=" << track->GetBackupTrack()
806 << "EventNrInFile=" << eventNrInFile
809 << "trdback.=" << track
815 // Propagation to the TOF (I.Belikov)
816 if (track->GetStop() == kFALSE) {
819 Double_t xtof = 371.0;
820 Double_t xTOF0 = 370.0;
822 Double_t c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
823 if (TMath::Abs(c2) >= 0.99) {
830 PropagateToX(*track,xTOF0,fgkMaxStep);
832 // Energy losses taken to the account - check one more time
833 c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
834 if (TMath::Abs(c2) >= 0.99) {
841 //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) {
842 // fHBackfit->Fill(7);
847 Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
849 track->GetYAt(xtof,GetBz(),y);
851 if (!track->Rotate( AliTRDgeometry::GetAlpha())) {
857 else if (y < -ymax) {
858 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
865 if (track->PropagateTo(xtof)) {
866 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
869 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
870 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
871 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
873 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
875 //seed->SetTRDtrack(new AliTRDtrack(*track));
876 if (track->GetNumberOfClusters() > foundMin) {
887 if ((track->GetNumberOfClusters() > 15) &&
888 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
890 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
893 //seed->SetStatus(AliESDtrack::kTRDStop);
894 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
895 for (Int_t j = 0; j <AliESDtrack::kNSlice; j++) {
896 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
898 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
900 //seed->SetTRDtrack(new AliTRDtrack(*track));
906 seed->SetTRDQuality(track->StatusForTOF());
907 seed->SetTRDBudget(track->GetBudget(0));
913 AliInfo(Form("Number of seeds: %d",fNseeds));
914 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
917 if (AliTRDReconstructor::SeedingOn()) {
918 MakeSeedsMI(3,5,event);
932 //_____________________________________________________________________________
933 Int_t AliTRDtracker::RefitInward(AliESD *event)
936 // Refits tracks within the TRD. The ESD event is expected to contain seeds
937 // at the outer part of the TRD.
938 // The tracks are propagated to the innermost time bin
939 // of the TRD and the ESD event is updated
940 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
943 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
944 Float_t foundMin = fgkMinClustersInTrack * timeBins;
947 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
950 Int_t n = event->GetNumberOfTracks();
951 for (Int_t i = 0; i < n; i++) {
953 AliESDtrack *seed = event->GetTrack(i);
954 new (&seed2) AliTRDtrack(*seed);
957 if (seed2.GetX() < 270.0) {
958 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
963 ULong_t status = seed->GetStatus();
964 if ((status & AliESDtrack::kTRDout) == 0) {
968 if ((status & AliESDtrack::kTRDin) != 0) {
976 seed2.ResetCovariance(50.0);
978 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
979 Int_t *indexes2 = seed2.GetIndexes();
980 for (Int_t i = 0; i < AliESDtrack::kNPlane;i++) {
981 for (Int_t j = 0; j < AliESDtrack::kNSlice;j++) {
982 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
984 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
987 Int_t *indexes3 = pt->GetBackupIndexes();
988 for (Int_t i = 0; i < 200;i++) {
989 if (indexes2[i] == 0) {
992 indexes3[i] = indexes2[i];
995 //AliTRDtrack *pt = seed2;
996 AliTRDtrack &t = *pt;
997 FollowProlongation(t);
998 if (t.GetNumberOfClusters() >= foundMin) {
1000 //CookLabel(pt, 1-fgkLabelFraction);
1006 Double_t xTPC = 250.0;
1007 if (PropagateToX(t,xTPC,fgkMaxStep)) {
1009 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
1012 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1013 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1014 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
1016 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
1020 // If not prolongation to TPC - propagate without update
1022 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
1023 seed2->ResetCovariance(5.0);
1024 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1026 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
1028 CookdEdxTimBin(*pt2);
1029 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
1032 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1033 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1034 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
1036 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
1046 AliInfo(Form("Number of loaded seeds: %d",nseed));
1047 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
1053 //_____________________________________________________________________________
1054 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
1057 // Starting from current position on track=t this function tries
1058 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1059 // if a close cluster is found. Returns the number of clusters
1060 // expected to be found in sensitive layers
1061 // GeoManager used to estimate mean density
1065 Int_t lastplane = GetLastPlane(&t);
1066 Double_t radLength = 0.0;
1068 Int_t expectedNumberOfClusters = 0;
1070 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
1072 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1073 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1076 // Propagate track close to the plane if neccessary
1078 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
1079 if (currentx < (-fgkMaxStep + t.GetX())) {
1080 // Propagate closer to chamber - safety space fgkMaxStep
1081 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
1086 if (!AdjustSector(&t)) {
1091 // Get material budget
1100 // Starting global position
1102 // End global position
1103 x = fTrSec[0]->GetLayer(row0)->GetX();
1104 if (!t.GetProlongation(x,y,z)) {
1107 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1108 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1110 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1112 radLength = param[1]; // Get mean propagation parameters
1115 // Propagate and update
1117 sector = t.GetSector();
1118 //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
1119 for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
1121 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
1122 expectedNumberOfClusters++;
1123 t.SetNExpected(t.GetNExpected() + 1);
1124 if (t.GetX() > 345.0) {
1125 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1127 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1128 AliTRDcluster *cl = 0;
1130 Double_t maxChi2 = fgkMaxChi2;
1135 AliTRDcluster *cl0 = timeBin[0];
1137 // No clusters in given time bin
1141 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1142 if (plane > lastplane) {
1146 Int_t timebin = cl0->GetLocalTimeBin();
1147 AliTRDcluster *cl2 = GetCluster(&t,plane,timebin,index);
1152 //Double_t h01 = GetTiltFactor(cl); //I.B's fix
1153 //maxChi2=t.GetPredictedChi2(cl,h01);
1158 //if (cl->GetNPads()<5)
1159 Double_t dxsample = timeBin.GetdX();
1160 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1161 Double_t h01 = GetTiltFactor(cl);
1162 Int_t det = cl->GetDetector();
1163 Int_t plane = fGeom->GetPlane(det);
1164 if (t.GetX() > 345.0) {
1165 t.SetNLast(t.GetNLast() + 1);
1166 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1169 Double_t xcluster = cl->GetX();
1170 t.PropagateTo(xcluster,radLength,rho);
1172 if (!AdjustSector(&t)) {
1175 maxChi2 = t.GetPredictedChi2(cl,h01);
1178 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1190 return expectedNumberOfClusters;
1194 //_____________________________________________________________________________
1195 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
1198 // Starting from current radial position of track <t> this function
1199 // extrapolates the track up to outer timebin and in the sensitive
1200 // layers confirms prolongation if a close cluster is found.
1201 // Returns the number of clusters expected to be found in sensitive layers
1202 // Use GEO manager for material Description
1204 // return number of assigned clusters ?
1209 Int_t clusters[1000];
1210 Double_t radLength = 0.0;
1212 Int_t expectedNumberOfClusters = 0;
1213 Float_t ratio0 = 0.0;
1214 AliTRDtracklet tracklet;
1216 // Calibration fill 2D
1217 AliTRDCalibra *calibra = AliTRDCalibra::Instance();
1219 AliInfo("Could not get Calibra instance\n");
1221 if (calibra->GetMITracking()) {
1222 calibra->ResetTrack();
1225 for (Int_t i = 0; i < 1000; i++) {
1229 for (Int_t iplane = 0; iplane < AliESDtrack::kNPlane; iplane++) {
1231 int hb = iplane * 10;
1232 fHClSearch->Fill(hb);
1234 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1235 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1236 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1237 if (currentx < t.GetX()) {
1238 fHClSearch->Fill(hb+1);
1243 // Propagate closer to chamber if neccessary
1245 if (currentx > (fgkMaxStep + t.GetX())) {
1246 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
1247 fHClSearch->Fill(hb+2);
1251 if (!AdjustSector(&t)) {
1252 fHClSearch->Fill(hb+3);
1255 if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
1256 fHClSearch->Fill(hb+4);
1261 // Get material budget inside of chamber
1269 // Starting global position
1271 // End global position
1272 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1273 if (!t.GetProlongation(x,y,z)) {
1274 fHClSearch->Fill(hb+5);
1277 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1278 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1280 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1282 radLength = param[1]; // Get mean propagation parameters
1287 sector = t.GetSector();
1288 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1289 fHNCl->Fill(tracklet.GetN());
1291 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
1292 fHClSearch->Fill(hb+6);
1297 // Propagate and update track
1299 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1301 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1302 expectedNumberOfClusters++;
1303 t.SetNExpected(t.GetNExpected() + 1);
1304 if (t.GetX() > 345.0) {
1305 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1307 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1308 AliTRDcluster *cl = 0;
1310 Double_t maxChi2 = fgkMaxChi2;
1315 if (clusters[ilayer] > 0) {
1316 index = clusters[ilayer];
1317 cl = (AliTRDcluster *)GetCluster(index);
1318 //Double_t h01 = GetTiltFactor(cl); // I.B's fix
1319 //maxChi2=t.GetPredictedChi2(cl,h01); //
1324 //if (cl->GetNPads() < 5)
1325 Double_t dxsample = timeBin.GetdX();
1326 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1327 Double_t h01 = GetTiltFactor(cl);
1328 Int_t det = cl->GetDetector();
1329 Int_t plane = fGeom->GetPlane(det);
1330 if (t.GetX() > 345.0) {
1331 t.SetNLast(t.GetNLast() + 1);
1332 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1334 Double_t xcluster = cl->GetX();
1335 t.PropagateTo(xcluster,radLength,rho);
1336 maxChi2 = t.GetPredictedChi2(cl,h01);
1339 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1340 if (!t.Update(cl,maxChi2,index,h01)) {
1345 if (calibra->GetMITracking()) {
1346 calibra->UpdateHistograms(cl,&t);
1349 // Reset material budget if 2 consecutive gold
1351 if ((t.GetTracklets(plane).GetN() + t.GetTracklets(plane-1).GetN()) > 20) {
1362 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1363 Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
1364 if ((tracklet.GetChi2() < 18.0) &&
1367 (ratio0+ratio1 > 1.5) &&
1368 (t.GetNCross() == 0) &&
1369 (TMath::Abs(t.GetSnp()) < 0.85) &&
1370 (t.GetNumberOfClusters() > 20)){
1371 //if (ratio0 > 0.8) {
1372 t.MakeBackupTrack(); // Make backup of the track until is gold
1377 return expectedNumberOfClusters;
1380 //_____________________________________________________________________________
1381 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1384 // Starting from current radial position of track <t> this function
1385 // extrapolates the track up to radial position <xToGo>.
1386 // Returns 1 if track reaches the plane, and 0 otherwise
1389 const Double_t kEpsilon = 0.00001;
1390 //Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1391 Double_t xpos = t.GetX();
1392 Double_t dir = (xpos<xToGo) ? 1.0 : -1.0;
1394 while (((xToGo-xpos)*dir) > kEpsilon) {
1396 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1404 // Starting global position
1408 if (!t.GetProlongation(x,y,z)) {
1409 return 0; // No prolongation
1412 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1413 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1416 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1417 if (!t.PropagateTo(x,param[1],param[0])) {
1429 //_____________________________________________________________________________
1430 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1433 // Fills clusters into TRD tracking_sectors
1434 // Note that the numbering scheme for the TRD tracking_sectors
1435 // differs from that of TRD sectors
1438 if (ReadClusters(fClusters,cTree)) {
1439 AliError("Problem with reading the clusters !");
1442 Int_t ncl = fClusters->GetEntriesFast();
1444 AliInfo(Form("Sorting %d clusters",ncl));
1447 for (Int_t ichamber = 0; ichamber < 5; ichamber++) {
1448 for (Int_t isector = 0; isector < 18; isector++) {
1449 fHoles[ichamber][isector] = kTRUE;
1455 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1456 Int_t detector = c->GetDetector();
1457 Int_t localTimeBin = c->GetLocalTimeBin();
1458 Int_t sector = fGeom->GetSector(detector);
1459 Int_t plane = fGeom->GetPlane(detector);
1460 Int_t trackingSector = sector;
1462 //if (c->GetLabel(0) > 0) {
1463 if (c->GetQ() > 10) {
1464 Int_t chamber = fGeom->GetChamber(detector);
1465 fHoles[chamber][trackingSector] = kFALSE;
1468 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1472 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1476 // Apply pos correction
1478 fHXCl->Fill(c->GetX());
1480 fTrSec[trackingSector]->GetLayer(layer)->SetX(c->GetX());
1481 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1488 //_____________________________________________________________________________
1489 void AliTRDtracker::UnloadClusters()
1492 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1498 nentr = fClusters->GetEntriesFast();
1499 for (i = 0; i < nentr; i++) {
1500 delete fClusters->RemoveAt(i);
1504 nentr = fSeeds->GetEntriesFast();
1505 for (i = 0; i < nentr; i++) {
1506 delete fSeeds->RemoveAt(i);
1509 nentr = fTracks->GetEntriesFast();
1510 for (i = 0; i < nentr; i++) {
1511 delete fTracks->RemoveAt(i);
1514 Int_t nsec = AliTRDgeometry::kNsect;
1515 for (i = 0; i < nsec; i++) {
1516 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1517 fTrSec[i]->GetLayer(pl)->Clear();
1523 //_____________________________________________________________________________
1524 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD *esd)
1527 // Creates seeds using clusters between position inner plane and outer plane
1530 const Double_t kMaxTheta = 1.0;
1531 const Double_t kMaxPhi = 2.0;
1533 const Double_t kRoad0y = 6.0; // Road for middle cluster
1534 const Double_t kRoad0z = 8.5; // Road for middle cluster
1536 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1537 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1539 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1540 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1541 const Int_t kMaxSeed = 3000;
1543 Int_t maxSec = AliTRDgeometry::kNsect;
1545 // Linear fitters in planes
1546 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1547 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1548 fitterTC.StoreData(kTRUE);
1549 fitterT2.StoreData(kTRUE);
1550 AliRieman rieman(1000); // Rieman fitter
1551 AliRieman rieman2(1000); // Rieman fitter
1553 // Find the maximal and minimal layer for the planes
1555 AliTRDpropagationLayer *reflayers[6];
1556 for (Int_t i = 0; i < 6; i++) {
1557 layers[i][0] = 10000;
1560 for (Int_t ns = 0; ns < maxSec; ns++) {
1561 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1562 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(ilayer));
1566 Int_t det = layer[0]->GetDetector();
1567 Int_t plane = fGeom->GetPlane(det);
1568 if (ilayer < layers[plane][0]) {
1569 layers[plane][0] = ilayer;
1571 if (ilayer > layers[plane][1]) {
1572 layers[plane][1] = ilayer;
1577 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1578 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1579 Double_t hL[6]; // Tilting angle
1580 Double_t xcl[6]; // X - position of reference cluster
1581 Double_t ycl[6]; // Y - position of reference cluster
1582 Double_t zcl[6]; // Z - position of reference cluster
1584 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1585 Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
1587 Double_t chi2R = 0.0;
1588 Double_t chi2Z = 0.0;
1589 Double_t chi2RF = 0.0;
1590 Double_t chi2ZF = 0.0;
1592 Int_t nclusters; // Total number of clusters
1593 for (Int_t i = 0; i < 6; i++) {
1601 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1602 AliTRDseed *seed[kMaxSeed];
1603 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1604 seed[iseed]= &pseed[iseed*6];
1606 AliTRDseed *cseed = seed[0];
1608 Double_t seedquality[kMaxSeed];
1609 Double_t seedquality2[kMaxSeed];
1610 Double_t seedparams[kMaxSeed][7];
1611 Int_t seedlayer[kMaxSeed];
1612 Int_t registered = 0;
1613 Int_t sort[kMaxSeed];
1618 for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
1619 //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
1621 registered = 0; // Reset registerd seed counter
1622 cseed = seed[registered];
1625 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1626 //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
1629 Int_t dseed = 5 + Int_t(iter) * 3;
1631 // Initialize seeding layers
1632 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1633 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1634 xcl[ilayer] = reflayers[ilayer]->GetX();
1637 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1638 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1639 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1640 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1641 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1643 Int_t maxn3 = layer3;
1644 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1646 AliTRDcluster *cl3 = layer3[icl3];
1650 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
1651 ycl[sLayer+3] = cl3->GetY();
1652 zcl[sLayer+3] = cl3->GetZ();
1653 Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1654 Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1655 Int_t maxn0 = layer0;
1657 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1659 AliTRDcluster *cl0 = layer0[icl0];
1663 if (cl3->IsUsed() && cl0->IsUsed()) {
1666 ycl[sLayer+0] = cl0->GetY();
1667 zcl[sLayer+0] = cl0->GetZ();
1668 if (ycl[sLayer+0] > yymax0) {
1671 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1672 if (TMath::Abs(tanphi) > kMaxPhi) {
1675 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1676 if (TMath::Abs(tantheta) > kMaxTheta) {
1679 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
1681 // Expected position in 1 layer
1682 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
1683 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
1684 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1685 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1686 Int_t maxn1 = layer1;
1688 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1690 AliTRDcluster *cl1 = layer1[icl1];
1695 if (cl3->IsUsed()) nusedCl++;
1696 if (cl0->IsUsed()) nusedCl++;
1697 if (cl1->IsUsed()) nusedCl++;
1701 ycl[sLayer+1] = cl1->GetY();
1702 zcl[sLayer+1] = cl1->GetZ();
1703 if (ycl[sLayer+1] > yymax1) {
1706 if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
1709 if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
1712 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
1714 Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
1715 Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
1716 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1720 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1721 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
1722 ycl[sLayer+2] = cl2->GetY();
1723 zcl[sLayer+2] = cl2->GetZ();
1724 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
1729 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1730 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1731 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1732 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1736 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1737 cseed[iLayer].Reset();
1742 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1743 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1744 chi2Z += (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer])
1745 * (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer]);
1746 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1747 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1748 chi2R += (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer])
1749 * (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer]);
1750 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1752 if (TMath::Sqrt(chi2R) > 1.0/iter) {
1755 if (TMath::Sqrt(chi2Z) > 7.0/iter) {
1759 Float_t minmax[2] = { -100.0, 100.0 };
1760 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1761 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
1762 + 1.0 - cseed[sLayer+iLayer].GetZref(0);
1763 if (max < minmax[1]) {
1766 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
1767 - 1.0 - cseed[sLayer+iLayer].GetZref(0);
1768 if (min > minmax[0]) {
1773 Bool_t isFake = kFALSE;
1774 if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
1777 if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
1780 if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
1784 if (AliTRDReconstructor::StreamLevel() > 0) {
1785 if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
1786 TTreeSRedirector &cstream = *fDebugStreamer;
1788 << "isFake=" << isFake
1794 << "X0=" << xcl[sLayer+0]
1795 << "X1=" << xcl[sLayer+1]
1796 << "X2=" << xcl[sLayer+2]
1797 << "X3=" << xcl[sLayer+3]
1798 << "Y2exp=" << y2exp
1799 << "Z2exp=" << z2exp
1800 << "Chi2R=" << chi2R
1801 << "Chi2Z=" << chi2Z
1802 << "Seed0.=" << &cseed[sLayer+0]
1803 << "Seed1.=" << &cseed[sLayer+1]
1804 << "Seed2.=" << &cseed[sLayer+2]
1805 << "Seed3.=" << &cseed[sLayer+3]
1806 << "Zmin=" << minmax[0]
1807 << "Zmax=" << minmax[1]
1812 ////////////////////////////////////////////////////////////////////////////////////
1816 ////////////////////////////////////////////////////////////////////////////////////
1822 Bool_t isOK = kTRUE;
1824 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1826 cseed[sLayer+jLayer].SetTilt(hL[sLayer+jLayer]);
1827 cseed[sLayer+jLayer].SetPadLength(padlength[sLayer+jLayer]);
1828 cseed[sLayer+jLayer].SetX0(xcl[sLayer+jLayer]);
1830 for (Int_t iter = 0; iter < 2; iter++) {
1833 // In iteration 0 we try only one pad-row
1834 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1836 AliTRDseed tseed = cseed[sLayer+jLayer];
1837 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1839 roadz = padlength[sLayer+jLayer];
1842 Float_t quality = 10000.0;
1844 for (Int_t iTime = 2; iTime < 20; iTime++) {
1846 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1847 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1848 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1851 // Try 2 pad-rows in second iteration
1852 zexp = tseed.GetZref(0) + tseed.GetZref(1) * dxlayer;
1853 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1854 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
1856 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1857 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
1861 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1862 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1866 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1868 tseed.SetIndexes(iTime,index);
1869 tseed.SetClusters(iTime,cl); // Register cluster
1870 tseed.SetX(iTime,dxlayer); // Register cluster
1871 tseed.SetY(iTime,cl->GetY()); // Register cluster
1872 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1878 // Count the number of clusters and distortions into quality
1879 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1880 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1881 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1882 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1883 if ((iter == 0) && tseed.IsOK()) {
1884 cseed[sLayer+jLayer] = tseed;
1890 if (tseed.IsOK() && (tquality < quality)) {
1891 cseed[sLayer+jLayer] = tseed;
1896 if (!cseed[sLayer+jLayer].IsOK()) {
1901 cseed[sLayer+jLayer].CookLabels();
1902 cseed[sLayer+jLayer].UpdateUsed();
1903 nusedCl += cseed[sLayer+jLayer].GetNUsed();
1915 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1916 if (cseed[sLayer+iLayer].IsOK()) {
1917 nclusters += cseed[sLayer+iLayer].GetN2();
1923 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1924 rieman.AddPoint(xcl[sLayer+iLayer]
1925 ,cseed[sLayer+iLayer].GetYfitR(0)
1926 ,cseed[sLayer+iLayer].GetZProb()
1935 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1936 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1937 chi2R += (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0))
1938 * (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0));
1939 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1940 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1941 chi2Z += (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz())
1942 * (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz());
1943 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1945 Double_t curv = rieman.GetC();
1950 Double_t sumda = TMath::Abs(cseed[sLayer+0].GetYfitR(1) - cseed[sLayer+0].GetYref(1))
1951 + TMath::Abs(cseed[sLayer+1].GetYfitR(1) - cseed[sLayer+1].GetYref(1))
1952 + TMath::Abs(cseed[sLayer+2].GetYfitR(1) - cseed[sLayer+2].GetYref(1))
1953 + TMath::Abs(cseed[sLayer+3].GetYfitR(1) - cseed[sLayer+3].GetYref(1));
1954 Double_t likea = TMath::Exp(-sumda*10.6);
1955 Double_t likechi2 = 0.0000000001;
1957 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1959 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1960 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1961 Double_t like = likea * likechi2 * likechi2z * likeN;
1962 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetYref(1) - 130.0*curv) * 1.9);
1963 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetZref(1)
1964 - cseed[sLayer+0].GetZref(0) / xcl[sLayer+0]) * 5.9);
1965 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1967 seedquality[registered] = like;
1968 seedlayer[registered] = sLayer;
1969 if (TMath::Log(0.000000000000001 + like) < -15) {
1972 AliTRDseed seedb[6];
1973 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1974 seedb[iLayer] = cseed[iLayer];
1977 ////////////////////////////////////////////////////////////////////////////////////
1979 // Full track fit part
1981 ////////////////////////////////////////////////////////////////////////////////////
1988 // Add new layers - avoid long extrapolation
1990 Int_t tLayer[2] = { 0, 0 };
2004 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2005 Int_t jLayer = tLayer[iLayer]; // Set tracking layer
2006 cseed[jLayer].Reset();
2007 cseed[jLayer].SetTilt(hL[jLayer]);
2008 cseed[jLayer].SetPadLength(padlength[jLayer]);
2009 cseed[jLayer].SetX0(xcl[jLayer]);
2010 // Get pad length and rough cluster
2011 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].GetYref(0)
2012 ,cseed[jLayer].GetZref(0)
2015 if (indexdummy <= 0) {
2018 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
2019 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
2021 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2023 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2025 Int_t jLayer = tLayer[iLayer]; // set tracking layer
2026 if ((jLayer == 0) && !(cseed[1].IsOK())) {
2027 continue; // break not allowed
2029 if ((jLayer == 5) && !(cseed[4].IsOK())) {
2030 continue; // break not allowed
2032 Float_t zexp = cseed[jLayer].GetZref(0);
2033 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
2035 for (Int_t iter = 0; iter < 2; iter++) {
2037 AliTRDseed tseed = cseed[jLayer];
2038 Float_t quality = 10000.0;
2040 for (Int_t iTime = 2; iTime < 20; iTime++) {
2041 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
2042 Double_t dxlayer = layer.GetX()-xcl[jLayer];
2043 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
2044 Float_t yroad = kRoad1y;
2045 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
2049 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2050 tseed.SetIndexes(iTime,index);
2051 tseed.SetClusters(iTime,cl); // Register cluster
2052 tseed.SetX(iTime,dxlayer); // Register cluster
2053 tseed.SetY(iTime,cl->GetY()); // Register cluster
2054 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2059 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2060 Float_t tquality = (18.0 - tseed.GetN2())/2.0 + TMath::Abs(dangle) / 0.1
2061 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
2062 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2063 if (tquality < quality) {
2064 cseed[jLayer] = tseed;
2073 if ( cseed[jLayer].IsOK()) {
2074 cseed[jLayer].CookLabels();
2075 cseed[jLayer].UpdateUsed();
2076 nusedf += cseed[jLayer].GetNUsed();
2077 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2083 AliTRDseed bseed[6];
2084 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2085 bseed[jLayer] = cseed[jLayer];
2087 Float_t lastquality = 10000.0;
2088 Float_t lastchi2 = 10000.0;
2089 Float_t chi2 = 1000.0;
2091 for (Int_t iter = 0; iter < 4; iter++) {
2093 // Sort tracklets according "quality", try to "improve" 4 worst
2094 Float_t sumquality = 0.0;
2095 Float_t squality[6];
2096 Int_t sortindexes[6];
2098 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2099 if (bseed[jLayer].IsOK()) {
2100 AliTRDseed &tseed = bseed[jLayer];
2101 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2102 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2103 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
2104 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2105 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2106 squality[jLayer] = tquality;
2109 squality[jLayer] = -1.0;
2111 sumquality +=squality[jLayer];
2114 if ((sumquality >= lastquality) ||
2115 (chi2 > lastchi2)) {
2118 lastquality = sumquality;
2121 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2122 cseed[jLayer] = bseed[jLayer];
2125 TMath::Sort(6,squality,sortindexes,kFALSE);
2127 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
2129 Int_t bLayer = sortindexes[jLayer];
2130 AliTRDseed tseed = bseed[bLayer];
2132 for (Int_t iTime = 2; iTime < 20; iTime++) {
2134 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
2135 Double_t dxlayer = layer.GetX() - xcl[bLayer];
2136 Double_t zexp = tseed.GetZref(0);
2137 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2138 Float_t roadz = padlength[bLayer] + 1;
2139 if (TMath::Abs(tseed.GetZProb() - zexp) > 0.5*padlength[bLayer]) {
2140 roadz = padlength[bLayer] * 0.5;
2142 if (tseed.GetZfit(1)*tseed.GetZref(1) < 0.0) {
2143 roadz = padlength[bLayer] * 0.5;
2145 if (TMath::Abs(tseed.GetZProb() - zexp) < 0.1*padlength[bLayer]) {
2146 zexp = tseed.GetZProb();
2147 roadz = padlength[bLayer] * 0.5;
2150 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer - zcor;
2151 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
2155 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2157 tseed.SetIndexes(iTime,index);
2158 tseed.SetClusters(iTime,cl); // Register cluster
2159 tseed.SetX(iTime,dxlayer); // Register cluster
2160 tseed.SetY(iTime,cl->GetY()); // Register cluster
2161 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2167 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2168 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2169 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0
2170 + TMath::Abs(dangle) / 0.1
2171 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2172 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2173 if (tquality<squality[bLayer]) {
2174 bseed[bLayer] = tseed;
2180 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
2187 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2188 if (TMath::Abs(cseed[iLayer].GetYref(0) / cseed[iLayer].GetX0()) < 0.15) {
2191 if (cseed[iLayer].IsOK()) {
2192 nclusters += cseed[iLayer].GetN2();
2200 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2201 if (cseed[iLayer].IsOK()) {
2202 rieman.AddPoint(xcl[iLayer]
2203 ,cseed[iLayer].GetYfitR(0)
2204 ,cseed[iLayer].GetZProb()
2213 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2214 if (cseed[iLayer].IsOK()) {
2215 cseed[iLayer].SetYref(0,rieman.GetYat(xcl[iLayer]));
2216 chi2RF += (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0))
2217 * (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0));
2218 cseed[iLayer].SetYref(1,rieman.GetDYat(xcl[iLayer]));
2219 cseed[iLayer].SetZref(0,rieman.GetZat(xcl[iLayer]));
2220 chi2ZF += (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz())
2221 * (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz());
2222 cseed[iLayer].SetZref(1,rieman.GetDZat(xcl[iLayer]));
2225 chi2RF /= TMath::Max((nlayers - 3.0),1.0);
2226 chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
2227 curv = rieman.GetC();
2229 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
2230 Double_t dzmf = rieman.GetDZat(xref2);
2231 Double_t zmf = rieman.GetZat(xref2);
2237 fitterTC.ClearPoints();
2238 fitterT2.ClearPoints();
2241 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2243 if (!cseed[iLayer].IsOK()) {
2247 for (Int_t itime = 0; itime < 25; itime++) {
2249 if (!cseed[iLayer].IsUsable(itime)) {
2252 // X relative to the middle chamber
2253 Double_t x = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0() - xref2;
2254 Double_t y = cseed[iLayer].GetY(itime);
2255 Double_t z = cseed[iLayer].GetZ(itime);
2256 // ExB correction to the correction
2260 Double_t x2 = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0();
2261 Double_t t = 1.0 / (x2*x2 + y*y);
2263 uvt[0] = 2.0 * x2 * uvt[1]; // u
2264 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
2265 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
2266 uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
2267 Double_t error = 2.0 * 0.2 * uvt[1];
2268 fitterT2.AddPoint(uvt,uvt[4],error);
2271 // Constrained rieman
2273 z = cseed[iLayer].GetZ(itime);
2274 uvt[0] = 2.0 * x2 * t; // u
2275 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
2276 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
2277 fitterTC.AddPoint(uvt,uvt[2],error);
2278 rieman2.AddPoint(x2,y,z,1,10);
2288 Double_t rpolz0 = fitterT2.GetParameter(3);
2289 Double_t rpolz1 = fitterT2.GetParameter(4);
2292 // Linear fitter - not possible to make boundaries
2293 // Do not accept non possible z and dzdx combinations
2295 Bool_t acceptablez = kTRUE;
2296 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2297 if (cseed[iLayer].IsOK()) {
2298 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2299 if (TMath::Abs(cseed[iLayer].GetZProb() - zT2) > padlength[iLayer] * 0.5 + 1.0) {
2300 acceptablez = kFALSE;
2305 fitterT2.FixParameter(3,zmf);
2306 fitterT2.FixParameter(4,dzmf);
2308 fitterT2.ReleaseParameter(3);
2309 fitterT2.ReleaseParameter(4);
2310 rpolz0 = fitterT2.GetParameter(3);
2311 rpolz1 = fitterT2.GetParameter(4);
2314 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2315 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2316 Double_t polz1c = fitterTC.GetParameter(2);
2317 Double_t polz0c = polz1c * xref2;
2318 Double_t aC = fitterTC.GetParameter(0);
2319 Double_t bC = fitterTC.GetParameter(1);
2320 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2321 Double_t aR = fitterT2.GetParameter(0);
2322 Double_t bR = fitterT2.GetParameter(1);
2323 Double_t dR = fitterT2.GetParameter(2);
2324 Double_t cR = 1.0 + bR*bR - dR*aR;
2327 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2328 cR = aR / TMath::Sqrt(cR);
2331 Double_t chi2ZT2 = 0.0;
2332 Double_t chi2ZTC = 0.0;
2333 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2334 if (cseed[iLayer].IsOK()) {
2335 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2336 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2337 chi2ZT2 += TMath::Abs(cseed[iLayer].GetMeanz() - zT2);
2338 chi2ZTC += TMath::Abs(cseed[iLayer].GetMeanz() - zTC);
2341 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2342 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2344 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2345 Float_t sumdaf = 0.0;
2346 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2347 if (cseed[iLayer].IsOK()) {
2348 sumdaf += TMath::Abs((cseed[iLayer].GetYfit(1) - cseed[iLayer].GetYref(1))
2349 / cseed[iLayer].GetSigmaY2());
2352 sumdaf /= Float_t (nlayers - 2.0);
2355 // Likelihoods for full track
2357 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2358 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2359 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2360 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2361 seedquality2[registered] = likezf * likechi2TR * likeaf;
2363 // Still needed ????
2364 // Bool_t isGold = kFALSE;
2366 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2367 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2368 // if (isGold &&nusedf<10){
2369 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2370 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2371 // seed[index][jLayer].UseClusters(); //sign gold
2376 if (!cseed[0].IsOK()) {
2378 if (!cseed[1].IsOK()) {
2382 seedparams[registered][0] = cseed[index0].GetX0();
2383 seedparams[registered][1] = cseed[index0].GetYref(0);
2384 seedparams[registered][2] = cseed[index0].GetZref(0);
2385 seedparams[registered][5] = cR;
2386 seedparams[registered][3] = cseed[index0].GetX0() * cR - TMath::Sin(TMath::ATan(cseed[0].GetYref(1)));
2387 seedparams[registered][4] = cseed[index0].GetZref(1)
2388 / TMath::Sqrt(1.0 + cseed[index0].GetYref(1) * cseed[index0].GetYref(1));
2389 seedparams[registered][6] = ns;
2394 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2395 if (!cseed[iLayer].IsOK()) {
2398 if (cseed[iLayer].GetLabels(0) >= 0) {
2399 labels[nlab] = cseed[iLayer].GetLabels(0);
2402 if (cseed[iLayer].GetLabels(1) >= 0) {
2403 labels[nlab] = cseed[iLayer].GetLabels(1);
2407 Freq(nlab,labels,outlab,kFALSE);
2408 Int_t label = outlab[0];
2409 Int_t frequency = outlab[1];
2410 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2411 cseed[iLayer].SetFreq(frequency);
2412 cseed[iLayer].SetC(cR);
2413 cseed[iLayer].SetCC(cC);
2414 cseed[iLayer].SetChi2(chi2TR);
2415 cseed[iLayer].SetChi2Z(chi2ZF);
2419 if (1 || (!isFake)) {
2420 Float_t zvertex = GetZ();
2421 TTreeSRedirector &cstream = *fDebugStreamer;
2422 if (AliTRDReconstructor::StreamLevel() > 0) {
2424 << "isFake=" << isFake
2425 << "Vertex=" << zvertex
2426 << "Rieman2.=" << &rieman2
2427 << "Rieman.=" << &rieman
2435 << "Chi2R=" << chi2R
2436 << "Chi2Z=" << chi2Z
2437 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2438 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2439 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2440 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2441 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2442 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2443 << "C=" << curv // Non constrained - no tilt correction
2444 << "DR=" << dR // DR parameter - tilt correction
2445 << "DCA=" << dca // DCA - tilt correction
2446 << "CR=" << cR // Non constrained curvature - tilt correction
2447 << "CC=" << cC // Constrained curvature
2448 << "Polz0=" << polz0c
2449 << "Polz1=" << polz1c
2450 << "RPolz0=" << rpolz0
2451 << "RPolz1=" << rpolz1
2452 << "Ncl=" << nclusters
2453 << "Nlayers=" << nlayers
2454 << "NUsedS=" << nusedCl
2455 << "NUsed=" << nusedf
2456 << "Findable=" << findable
2458 << "LikePrim=" << likePrim
2459 << "Likechi2C=" << likechi2C
2460 << "Likechi2TR=" << likechi2TR
2461 << "Likezf=" << likezf
2462 << "LikeF=" << seedquality2[registered]
2463 << "S0.=" << &cseed[0]
2464 << "S1.=" << &cseed[1]
2465 << "S2.=" << &cseed[2]
2466 << "S3.=" << &cseed[3]
2467 << "S4.=" << &cseed[4]
2468 << "S5.=" << &cseed[5]
2469 << "SB0.=" << &seedb[0]
2470 << "SB1.=" << &seedb[1]
2471 << "SB2.=" << &seedb[2]
2472 << "SB3.=" << &seedb[3]
2473 << "SB4.=" << &seedb[4]
2474 << "SB5.=" << &seedb[5]
2475 << "Label=" << label
2476 << "Freq=" << frequency
2477 << "sLayer=" << sLayer
2482 if (registered<kMaxSeed - 1) {
2484 cseed = seed[registered];
2487 } // End of loop over layer 1
2489 } // End of loop over layer 0
2491 } // End of loop over layer 3
2493 } // End of loop over seeding time bins
2499 TMath::Sort(registered,seedquality2,sort,kTRUE);
2500 Bool_t signedseed[kMaxSeed];
2501 for (Int_t i = 0; i < registered; i++) {
2502 signedseed[i] = kFALSE;
2505 for (Int_t iter = 0; iter < 5; iter++) {
2507 for (Int_t iseed = 0; iseed < registered; iseed++) {
2509 Int_t index = sort[iseed];
2510 if (signedseed[index]) {
2513 Int_t labelsall[1000];
2514 Int_t nlabelsall = 0;
2515 Int_t naccepted = 0;;
2516 Int_t sLayer = seedlayer[index];
2522 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2524 if (TMath::Abs(seed[index][jLayer].GetYref(0) / xcl[jLayer]) < 0.15) {
2527 if (seed[index][jLayer].IsOK()) {
2528 seed[index][jLayer].UpdateUsed();
2529 ncl +=seed[index][jLayer].GetN2();
2530 nused +=seed[index][jLayer].GetNUsed();
2533 for (Int_t itime = 0; itime < 25; itime++) {
2534 if (seed[index][jLayer].IsUsable(itime)) {
2536 for (Int_t ilab = 0; ilab < 3; ilab++) {
2537 Int_t tindex = seed[index][jLayer].GetClusters(itime)->GetLabel(ilab);
2539 labelsall[nlabelsall] = tindex;
2557 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2563 if (nlayers < findable) {
2566 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
2572 if ((nlayers == findable) ||
2576 if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
2582 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2588 if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
2593 signedseed[index] = kTRUE;
2598 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2599 if (seed[index][iLayer].IsOK()) {
2600 if (seed[index][iLayer].GetLabels(0) >= 0) {
2601 labels[nlab] = seed[index][iLayer].GetLabels(0);
2604 if (seed[index][iLayer].GetLabels(1) >= 0) {
2605 labels[nlab] = seed[index][iLayer].GetLabels(1);
2610 Freq(nlab,labels,outlab,kFALSE);
2611 Int_t label = outlab[0];
2612 Int_t frequency = outlab[1];
2613 Freq(nlabelsall,labelsall,outlab,kFALSE);
2614 Int_t label1 = outlab[0];
2615 Int_t label2 = outlab[2];
2616 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2617 Float_t ratio = Float_t(nused) / Float_t(ncl);
2619 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2620 if ((seed[index][jLayer].IsOK()) &&
2621 (TMath::Abs(seed[index][jLayer].GetYfit(1) - seed[index][jLayer].GetYfit(1)) < 0.2)) {
2622 seed[index][jLayer].UseClusters(); // Sign gold
2627 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.
2628 TTreeSRedirector &cstream = *fDebugStreamer;
2633 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2639 AliESDtrack esdtrack;
2640 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2641 esdtrack.SetLabel(label);
2642 esd->AddTrack(&esdtrack);
2643 TTreeSRedirector &cstream = *fDebugStreamer;
2644 if (AliTRDReconstructor::StreamLevel() > 0) {
2646 << "EventNrInFile=" << eventNrInFile
2647 << "ESD.=" << &esdtrack
2649 << "trdback.=" << track
2654 if (AliTRDReconstructor::StreamLevel() > 0) {
2657 << "Track.=" << track
2658 << "Like=" << seedquality[index]
2659 << "LikeF=" << seedquality2[index]
2660 << "S0.=" << &seed[index][0]
2661 << "S1.=" << &seed[index][1]
2662 << "S2.=" << &seed[index][2]
2663 << "S3.=" << &seed[index][3]
2664 << "S4.=" << &seed[index][4]
2665 << "S5.=" << &seed[index][5]
2666 << "Label=" << label
2667 << "Label1=" << label1
2668 << "Label2=" << label2
2669 << "FakeRatio=" << fakeratio
2670 << "Freq=" << frequency
2672 << "Nlayers=" << nlayers
2673 << "Findable=" << findable
2674 << "NUsed=" << nused
2675 << "sLayer=" << sLayer
2676 << "EventNrInFile=" << eventNrInFile
2684 } // End of loop over sectors
2690 //_____________________________________________________________________________
2691 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *clusterTree) const
2694 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2695 // from the file. The names of the cluster tree and branches
2696 // should match the ones used in AliTRDclusterizer::WriteClusters()
2699 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2700 TObjArray *clusterArray = new TObjArray(nsize+1000);
2702 TBranch *branch = clusterTree->GetBranch("TRDcluster");
2704 AliError("Can't get the branch !");
2707 branch->SetAddress(&clusterArray);
2709 // Loop through all entries in the tree
2710 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2712 AliTRDcluster *c = 0;
2713 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2716 nbytes += clusterTree->GetEvent(iEntry);
2718 // Get the number of points in the detector
2719 Int_t nCluster = clusterArray->GetEntriesFast();
2721 // Loop through all TRD digits
2722 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2723 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2724 AliTRDcluster *co = c;
2726 clusterArray->RemoveAt(iCluster);
2731 delete clusterArray;
2737 //_____________________________________________________________________________
2738 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2741 // Get track space point with index i
2742 // Origin: C.Cheshkov
2745 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2746 Int_t idet = cl->GetDetector();
2747 Int_t isector = fGeom->GetSector(idet);
2748 Int_t ichamber = fGeom->GetChamber(idet);
2749 Int_t iplan = fGeom->GetPlane(idet);
2751 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2752 local[1] = cl->GetY();
2753 local[2] = cl->GetZ();
2755 fGeom->RotateBack(idet,local,global);
2756 p.SetXYZ(global[0],global[1],global[2]);
2757 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
2760 iLayer = AliAlignObj::kTRD1;
2763 iLayer = AliAlignObj::kTRD2;
2766 iLayer = AliAlignObj::kTRD3;
2769 iLayer = AliAlignObj::kTRD4;
2772 iLayer = AliAlignObj::kTRD5;
2775 iLayer = AliAlignObj::kTRD6;
2778 Int_t modId = isector * fGeom->Ncham() + ichamber;
2779 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
2780 p.SetVolumeID(volid);
2786 //_____________________________________________________________________________
2787 void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
2790 // This cooks a label. Mmmmh, smells good...
2793 Int_t label = 123456789;
2797 Int_t ncl = pt->GetNumberOfClusters();
2799 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2803 Int_t **s = new Int_t* [kRange];
2804 for (i = 0; i < kRange; i++) {
2805 s[i] = new Int_t[2];
2807 for (i = 0; i < kRange; i++) {
2816 for (i = 0; i < ncl; i++) {
2817 index = pt->GetClusterIndex(i);
2818 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2824 for (i = 0; i < ncl; i++) {
2825 index = pt->GetClusterIndex(i);
2826 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2827 for (Int_t k = 0; k < 3; k++) {
2828 label = c->GetLabel(k);
2829 labelAdded = kFALSE;
2832 while ((!labelAdded) && (j < kRange)) {
2833 if ((s[j][0] == label) ||
2836 s[j][1] = s[j][1] + 1;
2848 for (i = 0; i < kRange; i++) {
2849 if (s[i][1] > max) {
2855 for (i = 0; i < kRange; i++) {
2861 if ((1.0 - Float_t(max)/ncl) > wrong) {
2865 pt->SetLabel(label);
2869 //_____________________________________________________________________________
2870 void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
2873 // Use clusters, but don't abuse them!
2876 const Float_t kmaxchi2 = 18;
2877 const Float_t kmincl = 10;
2879 AliTRDtrack *track = (AliTRDtrack *) t;
2881 Int_t ncl = t->GetNumberOfClusters();
2882 for (Int_t i = from; i < ncl; i++) {
2883 Int_t index = t->GetClusterIndex(i);
2884 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2885 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2886 if (track->GetTracklets(iplane).GetChi2() > kmaxchi2) {
2889 if (track->GetTracklets(iplane).GetN() < kmincl) {
2892 if (!(c->IsUsed())) {
2899 //_____________________________________________________________________________
2900 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2903 // Parametrised "expected" error of the cluster reconstruction in Y
2906 Double_t s = 0.08 * 0.08;
2911 //_____________________________________________________________________________
2912 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2915 // Parametrised "expected" error of the cluster reconstruction in Z
2918 Double_t s = 9.0 * 9.0 / 12.0;
2923 //_____________________________________________________________________________
2924 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2927 // Returns radial position which corresponds to time bin <localTB>
2928 // in tracking sector <sector> and plane <plane>
2931 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2932 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2934 return fTrSec[sector]->GetLayer(pl)->GetX();
2938 //_____________________________________________________________________________
2939 AliTRDtracker::AliTRDpropagationLayer
2940 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2941 , Double_t radLength, Int_t tbIndex, Int_t plane)
2950 ,fTimeBinIndex(tbIndex)
2963 // AliTRDpropagationLayer constructor
2966 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2971 if (fTimeBinIndex >= 0) {
2972 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2973 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2976 for (Int_t i = 0; i < 5; i++) {
2977 fIsHole[i] = kFALSE;
2982 //_____________________________________________________________________________
2983 void AliTRDtracker::AliTRDpropagationLayer
2984 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2985 , Double_t radLength, Double_t Yc, Double_t Zc)
2988 // Sets hole in the layer
2997 fHoleX0 = radLength;
3001 //_____________________________________________________________________________
3002 AliTRDtracker::AliTRDtrackingSector
3003 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
3009 // AliTRDtrackingSector Constructor
3012 AliTRDpadPlane *padPlane = 0;
3013 AliTRDpropagationLayer *ppl = 0;
3015 // Get holes description from geometry
3016 Bool_t holes[AliTRDgeometry::kNcham];
3017 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3018 holes[icham] = fGeom->IsHole(0,icham,gs);
3021 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
3022 fTimeBinIndex[i] = -1;
3030 // Add layers for each of the planes
3031 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
3032 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
3034 const Int_t kNchambers = AliTRDgeometry::Ncham();
3037 Double_t ymaxsensitive = 0;
3038 Double_t *zc = new Double_t[kNchambers];
3039 Double_t *zmax = new Double_t[kNchambers];
3040 Double_t *zmaxsensitive = new Double_t[kNchambers];
3042 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
3044 AliErrorGeneral("AliTRDtrackingSector::Ctor"
3045 ,"Could not get common parameters\n");
3049 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3051 ymax = fGeom->GetChamberWidth(plane) / 2.0;
3052 padPlane = commonParam->GetPadPlane(plane,0);
3053 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
3055 for (Int_t ch = 0; ch < kNchambers; ch++) {
3056 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
3057 Float_t pad = padPlane->GetRowSize(1);
3058 Float_t row0 = commonParam->GetRow0(plane,ch,0);
3059 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
3060 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
3061 zc[ch] = -(pad * nPads) / 2.0 + row0;
3064 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
3065 / commonParam->GetSamplingFrequency();
3066 rho = 0.00295 * 0.85; //????
3069 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
3070 //Double_t xbottom = x0 - dxDrift;
3071 //Double_t xtop = x0 + dxAmp;
3073 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3074 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
3076 Double_t xlayer = iTime * dx - dxAmp;
3077 //if (xlayer<0) xlayer = dxAmp / 2.0;
3080 tbIndex = CookTimeBinIndex(plane,iTime);
3081 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
3082 ppl->SetYmax(ymax,ymaxsensitive);
3083 ppl->SetZ(zc,zmax,zmaxsensitive);
3084 ppl->SetHoles(holes);
3095 delete [] zmaxsensitive;
3099 //_____________________________________________________________________________
3100 AliTRDtracker::AliTRDtrackingSector
3101 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
3112 //_____________________________________________________________________________
3113 Int_t AliTRDtracker::AliTRDtrackingSector
3114 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
3117 // depending on the digitization parameters calculates "global"
3118 // time bin index for timebin <localTB> in plane <plane>
3122 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3123 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
3135 //_____________________________________________________________________________
3136 void AliTRDtracker::AliTRDtrackingSector
3137 ::MapTimeBinLayers()
3140 // For all sensitive time bins sets corresponding layer index
3141 // in the array fTimeBins
3146 for (Int_t i = 0; i < fN; i++) {
3148 index = fLayers[i]->GetTimeBinIndex();
3153 if (index >= (Int_t) kMaxTimeBinIndex) {
3154 //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
3155 // ,index,kMaxTimeBinIndex-1));
3159 fTimeBinIndex[index] = i;
3165 //_____________________________________________________________________________
3166 Int_t AliTRDtracker::AliTRDtrackingSector
3167 ::GetLayerNumber(Double_t x) const
3170 // Returns the number of time bin which in radial position is closest to <x>
3173 if (x >= fLayers[fN-1]->GetX()) {
3176 if (x <= fLayers[ 0]->GetX()) {
3182 Int_t m = (b + e) / 2;
3184 for ( ; b < e; m = (b + e) / 2) {
3185 if (x > fLayers[m]->GetX()) {
3193 if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
3202 //_____________________________________________________________________________
3203 Int_t AliTRDtracker::AliTRDtrackingSector
3204 ::GetInnerTimeBin() const
3207 // Returns number of the innermost SENSITIVE propagation layer
3210 return GetLayerNumber(0);
3214 //_____________________________________________________________________________
3215 Int_t AliTRDtracker::AliTRDtrackingSector
3216 ::GetOuterTimeBin() const
3219 // Returns number of the outermost SENSITIVE time bin
3222 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3226 //_____________________________________________________________________________
3227 Int_t AliTRDtracker::AliTRDtrackingSector
3228 ::GetNumberOfTimeBins() const
3231 // Returns number of SENSITIVE time bins
3237 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
3238 layer = GetLayerNumber(tb);
3248 //_____________________________________________________________________________
3249 void AliTRDtracker::AliTRDtrackingSector
3250 ::InsertLayer(AliTRDpropagationLayer *pl)
3253 // Insert layer <pl> in fLayers array.
3254 // Layers are sorted according to X coordinate.
3257 if (fN == ((Int_t) kMaxLayersPerSector)) {
3258 //AliWarning("Too many layers !\n");
3267 Int_t i = Find(pl->GetX());
3269 memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3276 //_____________________________________________________________________________
3277 Int_t AliTRDtracker::AliTRDtrackingSector
3278 ::Find(Double_t x) const
3281 // Returns index of the propagation layer nearest to X
3284 if (x <= fLayers[0]->GetX()) {
3288 if (x > fLayers[fN-1]->GetX()) {
3294 Int_t m = (b + e) / 2;
3296 for (; b < e; m = (b + e) / 2) {
3297 if (x > fLayers[m]->GetX()) {
3309 //_____________________________________________________________________________
3310 void AliTRDtracker::AliTRDpropagationLayer
3311 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3314 // set centers and the width of sectors
3317 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3318 fZc[icham] = center[icham];
3319 fZmax[icham] = w[icham];
3320 fZmaxSensitive[icham] = wsensitive[icham];
3325 //_____________________________________________________________________________
3326 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3329 // set centers and the width of sectors
3334 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3335 fIsHole[icham] = holes[icham];
3343 //_____________________________________________________________________________
3344 void AliTRDtracker::AliTRDpropagationLayer
3345 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3348 // Insert cluster in cluster array.
3349 // Clusters are sorted according to Y coordinate.
3352 if (fTimeBinIndex < 0) {
3353 //AliWarning("Attempt to insert cluster into non-sensitive time bin!\n");
3357 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3358 //AliWarning("Too many clusters !\n");
3364 fClusters[fN++] = c;
3368 Int_t i = Find(c->GetY());
3369 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3370 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3377 //_____________________________________________________________________________
3378 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3381 // Returns index of the cluster nearest in Y
3387 if (y <= fClusters[0]->GetY()) {
3390 if (y > fClusters[fN-1]->GetY()) {
3396 Int_t m = (b + e) / 2;
3398 for ( ; b < e; m = (b + e) / 2) {
3399 if (y > fClusters[m]->GetY()) {
3411 //_____________________________________________________________________________
3412 Int_t AliTRDtracker::AliTRDpropagationLayer
3413 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3414 , Float_t maxroadz) const
3417 // Returns index of the cluster nearest to the given y,z
3422 Float_t mindist = maxroad;
3424 for (Int_t i = Find(y-maxroad); i < maxn; i++) {
3425 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3426 Float_t ycl = c->GetY();
3427 if (ycl > (y + maxroad)) {
3430 if (TMath::Abs(c->GetZ() - z) > maxroadz) {
3433 if (TMath::Abs(ycl - y) < mindist) {
3434 mindist = TMath::Abs(ycl - y);
3443 //_____________________________________________________________________________
3444 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
3447 // Returns correction factor for tilted pads geometry
3450 Int_t det = c->GetDetector();
3451 Int_t plane = fGeom->GetPlane(det);
3452 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
3453 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3463 //_____________________________________________________________________________
3464 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack &TRDtrack)
3467 // This is setting fdEdxPlane and fTimBinPlane
3468 // Sums up the charge in each plane for track TRDtrack and also get the
3469 // Time bin for Max. Cluster
3470 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
3473 Double_t clscharge[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3474 Double_t maxclscharge[AliESDtrack::kNPlane];
3475 Int_t nCluster[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3476 Int_t timebin[AliESDtrack::kNPlane];
3478 // Initialization of cluster charge per plane.
3479 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3480 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3481 clscharge[iPlane][iSlice] = 0.0;
3482 nCluster[iPlane][iSlice] = 0;
3486 // Initialization of cluster charge per plane.
3487 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3488 timebin[iPlane] = -1;
3489 maxclscharge[iPlane] = 0.0;
3492 // Loop through all clusters associated to track TRDtrack
3493 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
3494 for (Int_t iClus = 0; iClus < nClus; iClus++) {
3495 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
3496 Int_t index = TRDtrack.GetClusterIndex(iClus);
3497 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
3501 Int_t tb = pTRDcluster->GetLocalTimeBin();
3505 Int_t detector = pTRDcluster->GetDetector();
3506 Int_t iPlane = fGeom->GetPlane(detector);
3507 Int_t iSlice = tb * AliESDtrack::kNSlice / AliTRDtrack::kNtimeBins;
3508 clscharge[iPlane][iSlice] = clscharge[iPlane][iSlice] + charge;
3509 if (charge > maxclscharge[iPlane]) {
3510 maxclscharge[iPlane] = charge;
3511 timebin[iPlane] = tb;
3513 nCluster[iPlane][iSlice]++;
3514 } // End of loop over cluster
3516 // Setting the fdEdxPlane and fTimBinPlane variabales
3517 Double_t totalCharge = 0.0;
3519 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3520 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3521 if (nCluster[iPlane][iSlice]) {
3522 clscharge[iPlane][iSlice] /= nCluster[iPlane][iSlice];
3524 TRDtrack.SetPIDsignals(clscharge[iPlane][iSlice],iPlane,iSlice);
3525 totalCharge = totalCharge+clscharge[iPlane][iSlice];
3527 TRDtrack.SetPIDTimBin(timebin[iPlane],iPlane);
3530 // Still needed ????
3532 // Int_t nc=TRDtrack.GetNumberOfClusters();
3534 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
3536 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3537 // TRDtrack.SetPIDsignals(dedx, iPlane);
3538 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
3543 //_____________________________________________________________________________
3544 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3545 , AliTRDtrack *track
3546 , Int_t *clusters, AliTRDtracklet &tracklet)
3550 // Try to find nearest clusters to the track in timebins from t0 to t1
3552 // Correction coeficients - depend on TRD parameters - to be changed accordingly
3558 Double_t xmean = 0.0; // Reference x
3559 Double_t dz[10][100];
3560 Double_t dy[10][100];
3564 Int_t indexes[10][100]; // Indexes of the clusters in the road
3565 Int_t best[10][100]; // Index of best matching cluster
3566 AliTRDcluster *cl[10][100]; // Pointers to the clusters in the road
3568 for (Int_t it = 0; it < 100; it++) {
3575 for (Int_t ih = 0; ih < 10;ih++) {
3576 indexes[ih][it] = -2; // Reset indexes1
3578 dz[ih][it] = -100.0;
3579 dy[ih][it] = -100.0;
3584 Double_t x0 = track->GetX();
3585 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3590 Int_t detector = -1;
3591 Float_t padlength = 0.0;
3592 AliTRDtrack track2(* track);
3593 Float_t snpy = track->GetSnp();
3594 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3599 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
3600 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3601 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3607 for (Int_t it = 0; it < t1-t0; it++) {
3609 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3610 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
3612 continue; // No indexes1
3615 Int_t maxn = timeBin;
3616 x[it] = timeBin.GetX();
3617 track2.PropagateTo(x[it]);
3618 yt[it] = track2.GetY();
3619 zt[it] = track2.GetZ();
3621 Double_t y = yt[it];
3622 Double_t z = zt[it];
3623 Double_t chi2 = 1000000.0;
3627 // Find 2 nearest cluster at given time bin
3629 int checkPoint[4] = {0,0,0,0};
3630 double minY = 123456789;
3631 double minD[2] = {1,1};
3633 for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
3634 //for (Int_t i = 0; i < maxn; i++) {
3636 AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
3637 h01 = GetTiltFactor(c);
3639 Int_t det = c->GetDetector();
3640 plane = fGeom->GetPlane(det);
3641 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3644 //if (c->GetLocalTimeBin()==0) continue;
3645 if (c->GetY() > (y + road)) {
3649 fHDeltaX->Fill(c->GetX() - x[it]);
3650 //printf("%f\t%f\t%f \n", c->GetX(), x[it], c->GetX()-x[it]);
3652 if (TMath::Abs(c->GetY()-y) < TMath::Abs(minY)) {
3654 minD[0] = c->GetY()-y;
3655 minD[1] = c->GetZ()-z;
3660 fHMinZ->Fill(c->GetZ() - z);
3661 if ((c->GetZ() - z) * (c->GetZ() - z) > 2 * (12.0 * sz2)) {
3666 Double_t dist = TMath::Abs(c->GetZ() - z);
3667 if (dist > (0.5 * padlength + 6.0 * sigmaz)) { // 0.5
3668 continue; // 6 sigma boundary cut
3672 Double_t cost = 0.0;
3673 // Sigma boundary cost function
3674 if (dist> (0.5 * padlength - sigmaz)){
3675 cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
3677 cost = (cost + 1.0) * (cost + 1.0);
3683 //Int_t label = TMath::Abs(track->GetLabel());
3684 //if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
3685 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3688 if (chi2 > maxChi2[1]) {
3693 detector = c->GetDetector();
3694 // Store the clusters in the road
3695 for (Int_t ih = 2; ih < 9; ih++) {
3696 if (cl[ih][it] == 0) {
3698 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3703 if (chi2 < maxChi2[0]) {
3704 maxChi2[1] = maxChi2[0];
3706 indexes[1][it] = indexes[0][it];
3707 cl[1][it] = cl[0][it];
3708 indexes[0][it] = timeBin.GetIndex(i);
3714 indexes[1][it] = timeBin.GetIndex(i);
3718 for(int iCheckPoint = 0; iCheckPoint<4; iCheckPoint++)
3719 fHFindCl[iCheckPoint]->Fill(checkPoint[iCheckPoint]);
3721 if (checkPoint[3]) {
3722 if (track->GetPt() > 0) fHMinYPos->Fill(minY);
3723 else fHMinYNeg->Fill(minY);
3725 fHMinD->Fill(minD[0], minD[1]);
3738 xmean /= Float_t(nfound); // Middle x
3739 track2.PropagateTo(xmean); // Propagate track to the center
3742 // Choose one of the variants
3747 Double_t sumdy = 0.0;
3748 Double_t sumdy2 = 0.0;
3749 Double_t sumx = 0.0;
3750 Double_t sumxy = 0.0;
3751 Double_t sumx2 = 0.0;
3752 Double_t mpads = 0.0;
3758 Double_t moffset[10]; // Mean offset
3759 Double_t mean[10]; // Mean value
3760 Double_t angle[10]; // Angle
3762 Double_t smoffset[10]; // Sigma of mean offset
3763 Double_t smean[10]; // Sigma of mean value
3764 Double_t sangle[10]; // Sigma of angle
3765 Double_t smeanangle[10]; // Correlation
3767 Double_t sigmas[10];
3768 Double_t tchi2s[10]; // Chi2s for tracklet
3770 for (Int_t it = 0; it < 10; it++) {
3776 moffset[it] = 0.0; // Mean offset
3777 mean[it] = 0.0; // Mean value
3778 angle[it] = 0.0; // Angle
3780 smoffset[it] = 1.0e5; // Sigma of mean offset
3781 smean[it] = 1.0e5; // Sigma of mean value
3782 sangle[it] = 1.0e5; // Sigma of angle
3783 smeanangle[it] = 0.0; // Correlation
3786 tchi2s[it] = 1.0e5; // Chi2s for tracklet
3793 for (Int_t it = 0; it < t1 - t0; it++) {
3797 for (Int_t dt = -3; dt <= 3; dt++) {
3801 if (it+dt > t1-t0) {
3804 if (!cl[0][it+dt]) {
3807 zmean[it] += cl[0][it+dt]->GetZ();
3810 zmean[it] /= nmean[it];
3813 for (Int_t it = 0; it < t1 - t0; it++) {
3817 for (Int_t ih = 0; ih < 10; ih++) {
3818 dz[ih][it] = -100.0;
3819 dy[ih][it] = -100.0;
3823 Double_t xcluster = cl[ih][it]->GetX();
3826 track2.GetProlongation(xcluster,ytrack,ztrack );
3827 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
3828 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
3835 if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
3837 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
3845 // Iterative choice of "best path"
3847 Int_t label = TMath::Abs(track->GetLabel());
3850 for (Int_t iter = 0; iter < 9; iter++) {
3865 for (Int_t it = 0; it < t1 - t0; it++) {
3867 if (!cl[best[iter][it]][it]) {
3871 // Calculates pad-row changes
3872 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3873 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3874 for (Int_t itd = it - 1; itd >= 0; itd--) {
3875 if (cl[best[iter][itd]][itd]) {
3876 zbefore = cl[best[iter][itd]][itd]->GetZ();
3880 for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
3881 if (cl[best[iter][itd]][itd]) {
3882 zafter = cl[best[iter][itd]][itd]->GetZ();
3886 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
3887 (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
3891 Double_t dx = x[it]-xmean; // Distance to reference x
3892 sumz += cl[best[iter][it]][it]->GetZ();
3894 sumdy += dy[best[iter][it]][it];
3895 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3898 sumxy += dx*dy[best[iter][it]][it];
3899 mpads += cl[best[iter][it]][it]->GetNPads();
3900 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3901 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3902 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3912 // calculates line parameters
3914 Double_t det = sum*sumx2 - sumx*sumx;
3915 angle[iter] = (sum*sumxy - sumx*sumdy) / det;
3916 mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
3917 meanz[iter] = sumz / sum;
3918 moffset[iter] = sumdy / sum;
3919 mpads /= sum; // Mean number of pads
3921 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3922 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3924 for (Int_t it = 0; it < t1 - t0; it++) {
3925 if (!cl[best[iter][it]][it]) {
3928 Double_t dx = x[it] - xmean;
3929 Double_t ytr = mean[iter] + angle[iter] * dx;
3930 sigma2 += (dy[best[iter][it]][it] - ytr)
3931 * (dy[best[iter][it]][it] - ytr);
3932 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3933 * (dy[best[iter][it]][it] - moffset[iter]);
3936 sigma2 /= (sum - 2); // Normalized residuals
3937 sigma1 /= (sum - 1); // Normalized residuals
3938 smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
3939 sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
3940 smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
3941 sigmas[iter] = TMath::Sqrt(sigma1);
3942 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3945 // Iterative choice of "better path"
3947 for (Int_t it = 0; it < t1 - t0; it++) {
3949 if (!cl[best[iter][it]][it]) {
3953 // Add unisochronity + angular effect contribution
3954 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3955 Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
3956 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3957 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3958 Double_t mindist = 100000.0;
3961 for (Int_t ih = 0; ih < 10; ih++) {
3965 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3966 dist2 *= dist2; // Chi2 distance
3967 if (dist2 < mindist) {
3972 best[iter+1][it] = ihbest;
3976 // Update best hypothesy if better chi2 according tracklet position and angle
3978 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3979 Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
3980 Double_t say = track->GetSigmaSnpY(); // track->fCey;
3981 //Double_t chi20 = mean[bestiter]*mean[bestiter ] / sy2+angle[bestiter]*angle[bestiter]/sa2;
3982 //Double_t chi21 = mean[iter]*mean[iter] / sy2+angle[iter]*angle[iter]/sa2;
3984 Double_t detchi = sy2*sa2 - say*say;
3985 Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
3987 Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
3988 + angle[bestiter] * angle[bestiter] * invers[1]
3989 + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
3990 Double_t chi21 = mean[iter] * mean[iter] * invers[0]
3991 + angle[iter] * angle[iter] * invers[1]
3992 + 2.0 * mean[iter] * angle[iter] * invers[2];
3993 tchi2s[iter] = chi21;
3995 if ((changes[iter] <= changes[bestiter]) &&
4005 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
4006 Short_t maxpos = -1;
4007 Float_t maxcharge = 0.0;
4008 Short_t maxpos4 = -1;
4009 Float_t maxcharge4 = 0.0;
4010 Short_t maxpos5 = -1;
4011 Float_t maxcharge5 = 0.0;
4013 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
4014 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
4016 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
4017 ,-AliTracker::GetBz()*0.1);
4018 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
4020 expectederr += (mpads - 3.5) * 0.04;
4022 if (changes[bestiter] > 1) {
4023 expectederr += changes[bestiter] * 0.01;
4025 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
4026 //if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
4027 //expectederr+=10000;
4029 for (Int_t it = 0; it < t1 - t0; it++) {
4031 if (!cl[best[bestiter][it]][it]) {
4035 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // Set cluster error
4036 if (!cl[best[bestiter][it]][it]->IsUsed()) {
4037 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
4038 //cl[best[bestiter][it]][it]->Use();
4041 // Time bins with maximal charge
4042 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
4043 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4044 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4047 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
4048 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
4049 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4050 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4054 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
4055 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
4056 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4057 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4061 // Time bins with maximal charge
4062 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
4063 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4064 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4067 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
4068 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
4069 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4070 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4074 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
4075 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
4076 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4077 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4081 clusters[it+t0] = indexes[best[bestiter][it]][it];
4083 // Still needed ????
4084 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 &&
4085 //cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0]
4086 // = indexes[best[bestiter][it]][it]; //Test
4091 // Set tracklet parameters
4093 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
4095 trackleterr2 += (mpads - 3.5) * 0.04;
4097 trackleterr2 += changes[bestiter] * 0.01;
4098 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
4099 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
4101 // Set tracklet parameters
4103 ,track2.GetY() + moffset[bestiter]
4107 tracklet.SetTilt(h01);
4108 tracklet.SetP0(mean[bestiter]);
4109 tracklet.SetP1(angle[bestiter]);
4110 tracklet.SetN(nfound);
4111 tracklet.SetNCross(changes[bestiter]);
4112 tracklet.SetPlane(plane);
4113 tracklet.SetSigma2(expectederr);
4114 tracklet.SetChi2(tchi2s[bestiter]);
4115 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
4116 track->SetTracklets(plane,tracklet);
4117 track->SetNWrong(track->GetNWrong() + nbad[0]);
4122 TClonesArray array0("AliTRDcluster");
4123 TClonesArray array1("AliTRDcluster");
4124 array0.ExpandCreateFast(t1 - t0 + 1);
4125 array1.ExpandCreateFast(t1 - t0 + 1);
4126 TTreeSRedirector &cstream = *fDebugStreamer;
4127 AliTRDcluster dummy;
4131 for (Int_t it = 0; it < t1 - t0; it++) {
4132 dy0[it] = dy[0][it];
4133 dyb[it] = dy[best[bestiter][it]][it];
4135 new(array0[it]) AliTRDcluster(*cl[0][it]);
4138 new(array0[it]) AliTRDcluster(dummy);
4140 if(cl[best[bestiter][it]][it]) {
4141 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
4144 new(array1[it]) AliTRDcluster(dummy);
4147 TGraph graph0(t1-t0,x,dy0);
4148 TGraph graph1(t1-t0,x,dyb);
4149 TGraph graphy(t1-t0,x,yt);
4150 TGraph graphz(t1-t0,x,zt);
4152 if (AliTRDReconstructor::StreamLevel() > 0) {
4153 cstream << "tracklet"
4154 << "track.=" << track // Track parameters
4155 << "tany=" << tany // Tangent of the local track angle
4156 << "xmean=" << xmean // Xmean - reference x of tracklet
4157 << "tilt=" << h01 // Tilt angle
4158 << "nall=" << nall // Number of foundable clusters
4159 << "nfound=" << nfound // Number of found clusters
4160 << "clfound=" << clfound // Total number of found clusters in road
4161 << "mpads=" << mpads // Mean number of pads per cluster
4162 << "plane=" << plane // Plane number
4163 << "detector=" << detector // Detector number
4164 << "road=" << road // The width of the used road
4165 << "graph0.=" << &graph0 // x - y = dy for closest cluster
4166 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
4167 << "graphy.=" << &graphy // y position of the track
4168 << "graphz.=" << &graphz // z position of the track
4169 //<< "fCl.=" << &array0 // closest cluster
4170 //<< "fCl2.=" << &array1 // second closest cluster
4171 << "maxpos=" << maxpos // Maximal charge postion
4172 << "maxcharge=" << maxcharge // Maximal charge
4173 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
4174 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
4175 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
4176 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
4177 << "bestiter=" << bestiter // Best iteration number
4178 << "tracklet.=" << &tracklet // Corrspond to the best iteration
4179 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
4180 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
4181 << "sigmas0=" << sigmas[0] // Residuals sigma
4182 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
4183 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
4184 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
4185 << "ngoodb=" << ngood[bestiter] // in best iteration
4186 << "nbadb=" << nbad[bestiter] // in best iteration
4187 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
4188 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
4189 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
4190 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
4191 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
4192 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
4193 << "mean0=" << mean[0] // Mean dy in iter=0;
4194 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
4195 << "meanb=" << mean[bestiter] // Mean dy in iter=best
4196 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
4197 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
4198 << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
4199 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
4200 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
4201 << "expectederr=" << expectederr // Expected error of cluster position
4209 //_____________________________________________________________________________
4210 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
4211 , Int_t *outlist, Bool_t down)
4214 // Sort eleements according occurancy
4215 // The size of output array has is 2*n
4218 Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
4219 Int_t *sindexF = new Int_t[2*n];
4220 for (Int_t i = 0; i < n; i++) {
4224 TMath::Sort(n,inlist,sindexS,down);
4226 Int_t last = inlist[sindexS[0]];
4229 sindexF[0+n] = last;
4233 for (Int_t i = 1; i < n; i++) {
4234 val = inlist[sindexS[i]];
4236 sindexF[countPos]++;
4240 sindexF[countPos+n] = val;
4241 sindexF[countPos]++;
4249 // Sort according frequency
4250 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
4252 for (Int_t i = 0; i < countPos; i++) {
4253 outlist[2*i ] = sindexF[sindexS[i]+n];
4254 outlist[2*i+1] = sindexF[sindexS[i]];
4264 //_____________________________________________________________________________
4265 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
4271 Double_t alpha = AliTRDgeometry::GetAlpha();
4272 Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
4276 c[ 1] = 0.0; c[ 2] = 2.0;
4277 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
4278 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
4279 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4282 AliTRDcluster *cl = 0;
4284 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
4285 if (seeds[ilayer].IsOK()) {
4286 for (Int_t itime = 22; itime > 0; itime--) {
4287 if (seeds[ilayer].GetIndexes(itime) > 0) {
4288 index = seeds[ilayer].GetIndexes(itime);
4289 cl = seeds[ilayer].GetClusters(itime);
4302 AliTRDtrack *track = new AliTRDtrack(cl
4307 ,params[6]*alpha+shift);
4308 track->PropagateTo(params[0]-5.0);
4309 track->ResetCovariance(1);
4311 Int_t rc = FollowBackProlongation(*track);
4318 CookdEdxTimBin(*track);
4319 CookLabel(track,0.9);
4325 //////////////////////////////////////////////////////////////////////////////////////////
4327 void AliTRDtracker::InitLogHists() {
4329 fHBackfit = new TH1D("logTRD_backfit", "", 40, -0.5, 39.5);
4330 fHRefit = new TH1D("logTRD_refit", "", 40, -0.5, 39.5);
4331 fHClSearch = new TH1D("logTRD_clSearch", "", 60, -0.5, 59.5);
4333 fHX = new TH1D("logTRD_X", ";x (cm)", 200, 50, 400);
4334 fHNCl = new TH1D("logTRD_ncl", "", 40, -0.5, 39.5);
4335 fHNClTrack = new TH1D("logTRD_nclTrack", "", 180, -0.5, 179.5);
4337 fHMinYPos = new TH1D("logTRD_minYPos", ";#delta Y (cm)", 400, -6, 6);
4338 fHMinYNeg = new TH1D("logTRD_minYNeg", ";#delta Y (cm)", 400, -6, 6);
4339 fHMinZ = new TH1D("logTRD_minZ", ";#delta Z (cm)", 400, -20, 20);
4340 fHMinD = new TH2D("logTRD_minD", ";#delta Y (cm);#delta Z (cm)", 100, -6, 6, 100, -50, 50);
4342 fHDeltaX = new TH1D("logTRD_deltaX", ";#delta X (cm)", 100, -5, 5);
4343 fHXCl = new TH1D("logTRD_xCl", ";cluster x position (cm)", 1000, 280, 380);
4345 const char *nameFindCl[4] = {"logTRD_clY", "logTRD_clZ", "logTRD_clB", "logTRD_clG"};
4347 for(int i=0; i<4; i++) {
4348 fHFindCl[i] = new TH1D(nameFindCl[i], "", 30, -0.5, 29.5);
4352 //////////////////////////////////////////////////////////////////////////////////////////
4354 void AliTRDtracker::SaveLogHists() {
4356 TDirectory *sav = gDirectory;
4359 TSeqCollection *col = gROOT->GetListOfFiles();
4360 int N = col->GetEntries();
4361 for(int i=0; i<N; i++) {
4362 logFile = (TFile*)col->At(i);
4363 if (strstr(logFile->GetName(), "AliESDs.root")) break;
4367 fHBackfit->Write(fHBackfit->GetName(), TObject::kOverwrite);
4368 fHRefit->Write(fHRefit->GetName(), TObject::kOverwrite);
4369 fHClSearch->Write(fHClSearch->GetName(), TObject::kOverwrite);
4370 fHX->Write(fHX->GetName(), TObject::kOverwrite);
4371 fHNCl->Write(fHNCl->GetName(), TObject::kOverwrite);
4372 fHNClTrack->Write(fHNClTrack->GetName(), TObject::kOverwrite);
4374 fHMinYPos->Write(fHMinYPos->GetName(), TObject::kOverwrite);
4375 fHMinYNeg->Write(fHMinYNeg->GetName(), TObject::kOverwrite);
4376 fHMinD->Write(fHMinD->GetName(), TObject::kOverwrite);
4377 fHMinZ->Write(fHMinZ->GetName(), TObject::kOverwrite);
4379 fHDeltaX->Write(fHDeltaX->GetName(), TObject::kOverwrite);
4380 fHXCl->Write(fHXCl->GetName(), TObject::kOverwrite);
4383 for(int i=0; i<4; i++)
4384 fHFindCl[i]->Write(fHFindCl[i]->GetName(), TObject::kOverwrite);
4391 //////////////////////////////////////////////////////////////////////////////////////////