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>
42 #include "AliESDEvent.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 "AliTRDCalibraFillHisto.h"
59 ClassImp(AliTRDtracker)
61 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5; //
62 const Float_t AliTRDtracker::fgkLabelFraction = 0.8; //
63 const Double_t AliTRDtracker::fgkMaxChi2 = 12.0; //
64 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Corresponds to tan = 3
65 const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
67 //_____________________________________________________________________________
68 AliTRDtracker::AliTRDtracker()
95 // Default constructor
98 for (Int_t i = 0; i < kTrackingSectors; i++) {
101 for (Int_t j = 0; j < 5; j++) {
102 for (Int_t k = 0; k < 18; k++) {
103 fHoles[j][k] = kFALSE;
111 //_____________________________________________________________________________
112 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
133 ,fTimeBinsPerPlane(0)
134 ,fAddTRDseeds(kFALSE)
144 //_____________________________________________________________________________
145 AliTRDtracker::AliTRDtracker(const TFile */*geomfile*/)
161 ,fClusters(new TObjArray(2000))
163 ,fSeeds(new TObjArray(2000))
165 ,fTracks(new TObjArray(1000))
166 ,fTimeBinsPerPlane(0)
167 ,fAddTRDseeds(kFALSE)
175 TDirectory *savedir = gDirectory;
177 fGeom = new AliTRDgeometry();
178 fGeom->ReadGeoMatrices();
180 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
182 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
183 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
185 fHoles[icham][trS] = fGeom->IsHole(0,icham,geomS);
189 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(0,0);
190 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
191 if (tiltAngle < 0.1) {
195 if (!AliTRDcalibDB::Instance()) {
196 AliFatal("Could not get calibration object");
198 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
200 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
208 //_____________________________________________________________________________
209 AliTRDtracker::~AliTRDtracker()
212 // Destructor of AliTRDtracker
234 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
235 delete fTrSec[geomS];
238 if (fDebugStreamer) {
239 delete fDebugStreamer;
244 //_____________________________________________________________________________
245 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
248 // Transform internal TRD ID to global detector ID
251 Int_t isector = fGeom->GetSector(lid);
252 Int_t ichamber = fGeom->GetChamber(lid);
253 Int_t iplan = fGeom->GetPlane(lid);
255 AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
258 iLayer = AliGeomManager::kTRD1;
261 iLayer = AliGeomManager::kTRD2;
264 iLayer = AliGeomManager::kTRD3;
267 iLayer = AliGeomManager::kTRD4;
270 iLayer = AliGeomManager::kTRD5;
273 iLayer = AliGeomManager::kTRD6;
277 Int_t modId = isector * fGeom->Ncham() + ichamber;
278 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
284 //_____________________________________________________________________________
285 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
288 // Transform global detector ID to local detector ID
292 AliGeomManager::ELayerID layerId = AliGeomManager::VolUIDToLayer(gid,modId);
294 Int_t isector = modId / fGeom->Ncham();
295 Int_t ichamber = modId % fGeom->Ncham();
299 case AliGeomManager::kTRD1:
302 case AliGeomManager::kTRD2:
305 case AliGeomManager::kTRD3:
308 case AliGeomManager::kTRD4:
311 case AliGeomManager::kTRD5:
314 case AliGeomManager::kTRD6:
325 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
331 //_____________________________________________________________________________
332 Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
335 // Transform from cluster system to tracking system
338 // Magic constants for geo manager transformation
339 const Double_t kX0shift = 2.52;
342 // Apply alignment and calibration to transform cluster
344 Int_t detector = cluster->GetDetector();
345 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
346 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
347 Int_t sector = fGeom->GetSector(cluster->GetDetector());
349 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
350 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.0); // Drift distance
355 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
356 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
358 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(plane,chamber);
359 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
360 Double_t localPos[3];
361 Double_t localPosTracker[3];
362 localPos[0] = -cluster->GetX();
363 localPos[1] = cluster->GetY() - driftX * exB;
364 localPos[2] = cluster->GetZ() - zshiftIdeal;
366 cluster->SetY(cluster->GetY() - driftX*exB);
367 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
368 cluster->SetX(xplane - cluster->GetX());
370 TGeoHMatrix *matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
372 // No matrix found - if somebody used geometry with holes
373 AliError("Invalid Geometry - Default Geometry used\n");
376 matrix->LocalToMaster(localPos,localPosTracker);
378 if (AliTRDReconstructor::StreamLevel() > 1) {
379 (* fDebugStreamer) << "Transform"
381 << "matrix.=" << matrix
382 << "Detector=" << detector
383 << "Sector=" << sector
385 << "Chamber=" << chamber
386 << "lx0=" << localPosTracker[0]
387 << "ly0=" << localPosTracker[1]
388 << "lz0=" << localPosTracker[2]
392 cluster->SetX(localPosTracker[0]+kX0shift);
393 cluster->SetY(localPosTracker[1]);
394 cluster->SetZ(localPosTracker[2]);
400 //_____________________________________________________________________________
401 // Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
404 // // Is this still needed ????
406 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
407 // const Double_t kTime0Cor = 0.32; // time0 correction
409 // const Double_t kX0shift = 2.52;
410 // const Double_t kX0shift5 = 3.05;
413 // // apply alignment and calibration to transform cluster
416 // Int_t detector = cluster->GetDetector();
417 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
418 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
419 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
421 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
422 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
426 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
427 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
430 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
431 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
432 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
433 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
434 // localPos[2] = -cluster->GetX();
435 // localPos[0] = cluster->GetY() - driftX*exB;
436 // localPos[1] = cluster->GetZ() -zshiftIdeal;
437 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
438 // matrix->LocalToMaster(localPos, globalPos);
440 // Double_t sectorAngle = 20.*(sector%18)+10;
441 // TGeoHMatrix rotSector;
442 // rotSector.RotateZ(sectorAngle);
443 // rotSector.LocalToMaster(globalPos, localPosTracker);
446 // TGeoHMatrix matrix2(*matrix);
447 // matrix2.MultiplyLeft(&rotSector);
448 // matrix2.LocalToMaster(localPos,localPosTracker2);
452 // cluster->SetY(cluster->GetY() - driftX*exB);
453 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
454 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
455 // (*fDebugStreamer)<<"Transform"<<
457 // "matrix.="<<matrix<<
458 // "matrix2.="<<&matrix2<<
459 // "Detector="<<detector<<
460 // "Sector="<<sector<<
462 // "Chamber="<<chamber<<
463 // "lx0="<<localPosTracker[0]<<
464 // "ly0="<<localPosTracker[1]<<
465 // "lz0="<<localPosTracker[2]<<
466 // "lx2="<<localPosTracker2[0]<<
467 // "ly2="<<localPosTracker2[1]<<
468 // "lz2="<<localPosTracker2[2]<<
472 // cluster->SetX(localPosTracker[0]+kX0shift5);
474 // cluster->SetX(localPosTracker[0]+kX0shift);
476 // cluster->SetY(localPosTracker[1]);
477 // cluster->SetZ(localPosTracker[2]);
481 //_____________________________________________________________________________
482 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
485 // Rotates the track when necessary
488 Double_t alpha = AliTRDgeometry::GetAlpha();
489 Double_t y = track->GetY();
490 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
492 // Is this still needed ????
493 //Int_t ns = AliTRDgeometry::kNsect;
494 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
498 if (!track->Rotate( alpha)) {
502 else if (y < -ymax) {
504 if (!track->Rotate(-alpha)) {
513 //_____________________________________________________________________________
514 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
515 , Int_t timebin, UInt_t &index)
518 // Try to find cluster in the backup list
521 AliTRDcluster *cl =0;
522 Int_t *indexes = track->GetBackupIndexes();
524 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
525 if (indexes[i] == 0) {
528 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
532 if (cli->GetLocalTimeBin() != timebin) {
535 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
536 if (iplane == plane) {
547 //_____________________________________________________________________________
548 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
551 // Return last updated plane
555 Int_t *indexes = track->GetBackupIndexes();
557 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
558 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
562 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
563 if (iplane > lastplane) {
572 //_____________________________________________________________________________
573 Int_t AliTRDtracker::Clusters2Tracks(AliESDEvent *event)
576 // Finds tracks within the TRD. The ESD event is expected to contain seeds
577 // at the outer part of the TRD. The seeds
578 // are found within the TRD if fAddTRDseeds is TRUE.
579 // The tracks are propagated to the innermost time bin
580 // of the TRD and the ESD event is updated
583 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
584 Float_t foundMin = fgkMinClustersInTrack * timeBins;
587 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
589 Int_t n = event->GetNumberOfTracks();
590 for (Int_t i = 0; i < n; i++) {
592 AliESDtrack *seed = event->GetTrack(i);
593 ULong_t status = seed->GetStatus();
594 if ((status & AliESDtrack::kTRDout) == 0) {
597 if ((status & AliESDtrack::kTRDin) != 0) {
602 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
603 //seed2->ResetCovariance();
604 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
605 AliTRDtrack &t = *pt;
606 FollowProlongation(t);
607 if (t.GetNumberOfClusters() >= foundMin) {
609 CookLabel(pt,1 - fgkLabelFraction);
614 Double_t xTPC = 250.0;
615 if (PropagateToX(t,xTPC,fgkMaxStep)) {
616 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
623 AliInfo(Form("Number of loaded seeds: %d",nseed));
624 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
625 AliInfo(Form("Total number of found tracks: %d",found));
631 //_____________________________________________________________________________
632 Int_t AliTRDtracker::PropagateBack(AliESDEvent *event)
635 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
636 // backpropagated by the TPC tracker. Each seed is first propagated
637 // to the TRD, and then its prolongation is searched in the TRD.
638 // If sufficiently long continuation of the track is found in the TRD
639 // the track is updated, otherwise it's stored as originaly defined
640 // by the TPC tracker.
643 Int_t found = 0; // number of tracks found
644 Float_t foundMin = 20.0;
645 Int_t n = event->GetNumberOfTracks();
648 Float_t *quality = new Float_t[n];
649 Int_t *index = new Int_t[n];
650 for (Int_t i = 0; i < n; i++) {
651 AliESDtrack *seed = event->GetTrack(i);
652 Double_t covariance[15];
653 seed->GetExternalCovariance(covariance);
654 quality[i] = covariance[0]+covariance[2];
655 //quality[i] = covariance[0];
657 TMath::Sort(n,quality,index,kFALSE);
659 for (Int_t i = 0; i < n; i++) {
661 //AliESDtrack *seed = event->GetTrack(i);
662 AliESDtrack *seed = event->GetTrack(index[i]);
665 ULong_t status = seed->GetStatus();
666 if ((status & AliESDtrack::kTPCout) == 0) {
671 if ((status & AliESDtrack::kTRDout) != 0) {
676 Int_t lbl = seed->GetLabel();
677 AliTRDtrack *track = new AliTRDtrack(*seed);
678 track->SetSeedLabel(lbl);
679 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
681 Float_t p4 = track->GetC();
682 Int_t expectedClr = FollowBackProlongation(*track);
685 fHX->Fill(track->GetX());
688 // store the last measurement
690 fHNClTrack->Fill(track->GetNumberOfClusters());
691 if (track->GetNumberOfClusters() >= foundMin) {
695 CookdEdxTimBin(*track);
696 CookLabel(track,1 - fgkLabelFraction);
697 if (track->GetBackupTrack()) {
698 //fHBackfit->Fill(5);
699 UseClusters(track->GetBackupTrack());
700 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
706 // inter-tracks competition ???
707 if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
708 (TMath::Abs(track->GetPt()) > 0.8)) {
713 // Make backup for back propagation
716 Int_t foundClr = track->GetNumberOfClusters();
717 if (foundClr >= foundMin) {
719 CookdEdxTimBin(*track);
720 CookLabel(track,1 - fgkLabelFraction);
721 if (track->GetBackupTrack()) {
722 UseClusters(track->GetBackupTrack());
725 // Sign only gold tracks
726 if (track->GetChi2() / track->GetNumberOfClusters() < 4) {
727 if ((seed->GetKinkIndex(0) == 0) &&
728 (TMath::Abs(track->GetPt()) < 1.5)) {
732 Bool_t isGold = kFALSE;
735 if (track->GetChi2() / track->GetNumberOfClusters() < 5) {
736 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
737 if (track->GetBackupTrack()) {
738 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
747 (track->GetNCross() == 0) &&
748 (track->GetChi2() / track->GetNumberOfClusters() < 7)) {
749 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
750 if (track->GetBackupTrack()) {
751 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
757 (track->GetBackupTrack())) {
758 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
759 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
760 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
765 if ((track->StatusForTOF() > 0) &&
766 (track->GetNCross() == 0) &&
767 (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) {
768 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
776 // Debug part of tracking
777 TTreeSRedirector &cstream = *fDebugStreamer;
778 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.
779 if (AliTRDReconstructor::StreamLevel() > 0) {
780 if (track->GetBackupTrack()) {
782 << "EventNrInFile=" << eventNrInFile
785 << "trdback.=" << track->GetBackupTrack()
790 << "EventNrInFile=" << eventNrInFile
793 << "trdback.=" << track
799 // Propagation to the TOF (I.Belikov)
800 if (track->GetStop() == kFALSE) {
803 Double_t xtof = 371.0;
804 Double_t xTOF0 = 370.0;
806 Double_t c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
807 if (TMath::Abs(c2) >= 0.99) {
814 PropagateToX(*track,xTOF0,fgkMaxStep);
816 // Energy losses taken to the account - check one more time
817 c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
818 if (TMath::Abs(c2) >= 0.99) {
825 //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) {
826 // fHBackfit->Fill(7);
831 Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
833 track->GetYAt(xtof,GetBz(),y);
835 if (!track->Rotate( AliTRDgeometry::GetAlpha())) {
841 else if (y < -ymax) {
842 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
849 if (track->PropagateTo(xtof)) {
850 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
853 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
854 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
855 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
857 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
859 //seed->SetTRDtrack(new AliTRDtrack(*track));
860 if (track->GetNumberOfClusters() > foundMin) {
871 if ((track->GetNumberOfClusters() > 15) &&
872 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
874 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
877 //seed->SetStatus(AliESDtrack::kTRDStop);
878 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
879 for (Int_t j = 0; j <AliESDtrack::kNSlice; j++) {
880 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
882 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
884 //seed->SetTRDtrack(new AliTRDtrack(*track));
890 seed->SetTRDQuality(track->StatusForTOF());
891 seed->SetTRDBudget(track->GetBudget(0));
897 AliInfo(Form("Number of seeds: %d",fNseeds));
898 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
901 if (AliTRDReconstructor::SeedingOn()) {
902 MakeSeedsMI(3,5,event);
916 //_____________________________________________________________________________
917 Int_t AliTRDtracker::RefitInward(AliESDEvent *event)
920 // Refits tracks within the TRD. The ESD event is expected to contain seeds
921 // at the outer part of the TRD.
922 // The tracks are propagated to the innermost time bin
923 // of the TRD and the ESD event is updated
924 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
927 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
928 Float_t foundMin = fgkMinClustersInTrack * timeBins;
931 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
934 Int_t n = event->GetNumberOfTracks();
935 for (Int_t i = 0; i < n; i++) {
937 AliESDtrack *seed = event->GetTrack(i);
938 new (&seed2) AliTRDtrack(*seed);
941 if (seed2.GetX() < 270.0) {
942 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
947 ULong_t status = seed->GetStatus();
948 if ((status & AliESDtrack::kTRDout) == 0) {
952 if ((status & AliESDtrack::kTRDin) != 0) {
960 seed2.ResetCovariance(50.0);
962 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
963 Int_t *indexes2 = seed2.GetIndexes();
964 for (Int_t i = 0; i < AliESDtrack::kNPlane;i++) {
965 for (Int_t j = 0; j < AliESDtrack::kNSlice;j++) {
966 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
968 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
971 Int_t *indexes3 = pt->GetBackupIndexes();
972 for (Int_t i = 0; i < 200;i++) {
973 if (indexes2[i] == 0) {
976 indexes3[i] = indexes2[i];
979 //AliTRDtrack *pt = seed2;
980 AliTRDtrack &t = *pt;
981 FollowProlongation(t);
982 if (t.GetNumberOfClusters() >= foundMin) {
984 //CookLabel(pt, 1-fgkLabelFraction);
990 Double_t xTPC = 250.0;
991 if (PropagateToX(t,xTPC,fgkMaxStep)) {
993 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
996 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
997 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
998 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
1000 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
1004 // If not prolongation to TPC - propagate without update
1006 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
1007 seed2->ResetCovariance(5.0);
1008 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1010 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
1012 CookdEdxTimBin(*pt2);
1013 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
1016 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1017 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1018 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
1020 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
1030 AliInfo(Form("Number of loaded seeds: %d",nseed));
1031 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
1037 //_____________________________________________________________________________
1038 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
1041 // Starting from current position on track=t this function tries
1042 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1043 // if a close cluster is found. Returns the number of clusters
1044 // expected to be found in sensitive layers
1045 // GeoManager used to estimate mean density
1049 Int_t lastplane = GetLastPlane(&t);
1050 Double_t radLength = 0.0;
1052 Int_t expectedNumberOfClusters = 0;
1054 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
1056 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1057 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1060 // Propagate track close to the plane if neccessary
1062 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
1063 if (currentx < (-fgkMaxStep + t.GetX())) {
1064 // Propagate closer to chamber - safety space fgkMaxStep
1065 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
1070 if (!AdjustSector(&t)) {
1075 // Get material budget
1084 // Starting global position
1086 // End global position
1087 x = fTrSec[0]->GetLayer(row0)->GetX();
1088 if (!t.GetProlongation(x,y,z)) {
1091 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1092 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1094 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1096 radLength = param[1]; // Get mean propagation parameters
1099 // Propagate and update
1101 sector = t.GetSector();
1102 //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
1103 for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
1105 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
1106 expectedNumberOfClusters++;
1107 t.SetNExpected(t.GetNExpected() + 1);
1108 if (t.GetX() > 345.0) {
1109 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1111 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1112 AliTRDcluster *cl = 0;
1114 Double_t maxChi2 = fgkMaxChi2;
1119 AliTRDcluster *cl0 = timeBin[0];
1121 // No clusters in given time bin
1125 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1126 if (plane > lastplane) {
1130 Int_t timebin = cl0->GetLocalTimeBin();
1131 AliTRDcluster *cl2 = GetCluster(&t,plane,timebin,index);
1136 //Double_t h01 = GetTiltFactor(cl); //I.B's fix
1137 //maxChi2=t.GetPredictedChi2(cl,h01);
1142 //if (cl->GetNPads()<5)
1143 Double_t dxsample = timeBin.GetdX();
1144 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1145 Double_t h01 = GetTiltFactor(cl);
1146 Int_t det = cl->GetDetector();
1147 Int_t plane = fGeom->GetPlane(det);
1148 if (t.GetX() > 345.0) {
1149 t.SetNLast(t.GetNLast() + 1);
1150 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1153 Double_t xcluster = cl->GetX();
1154 t.PropagateTo(xcluster,radLength,rho);
1156 if (!AdjustSector(&t)) {
1159 maxChi2 = t.GetPredictedChi2(cl,h01);
1162 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1174 return expectedNumberOfClusters;
1178 //_____________________________________________________________________________
1179 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
1182 // Starting from current radial position of track <t> this function
1183 // extrapolates the track up to outer timebin and in the sensitive
1184 // layers confirms prolongation if a close cluster is found.
1185 // Returns the number of clusters expected to be found in sensitive layers
1186 // Use GEO manager for material Description
1188 // return number of assigned clusters ?
1193 Int_t clusters[1000];
1194 Double_t radLength = 0.0;
1196 Int_t expectedNumberOfClusters = 0;
1197 Float_t ratio0 = 0.0;
1198 AliTRDtracklet tracklet;
1200 // Calibration fill 2D
1201 AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance();
1203 AliInfo("Could not get Calibra instance\n");
1205 if (calibra->GetMITracking()) {
1206 calibra->ResetTrack();
1209 for (Int_t i = 0; i < 1000; i++) {
1213 for (Int_t iplane = 0; iplane < AliESDtrack::kNPlane; iplane++) {
1215 int hb = iplane * 10;
1216 fHClSearch->Fill(hb);
1218 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1219 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1220 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1221 if (currentx < t.GetX()) {
1222 fHClSearch->Fill(hb+1);
1227 // Propagate closer to chamber if neccessary
1229 if (currentx > (fgkMaxStep + t.GetX())) {
1230 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
1231 fHClSearch->Fill(hb+2);
1235 if (!AdjustSector(&t)) {
1236 fHClSearch->Fill(hb+3);
1239 if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
1240 fHClSearch->Fill(hb+4);
1245 // Get material budget inside of chamber
1253 // Starting global position
1255 // End global position
1256 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1257 if (!t.GetProlongation(x,y,z)) {
1258 fHClSearch->Fill(hb+5);
1261 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1262 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1264 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1266 radLength = param[1]; // Get mean propagation parameters
1271 sector = t.GetSector();
1272 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1273 fHNCl->Fill(tracklet.GetN());
1275 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
1276 fHClSearch->Fill(hb+6);
1281 // Propagate and update track
1283 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1285 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1286 expectedNumberOfClusters++;
1287 t.SetNExpected(t.GetNExpected() + 1);
1288 if (t.GetX() > 345.0) {
1289 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1291 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1292 AliTRDcluster *cl = 0;
1294 Double_t maxChi2 = fgkMaxChi2;
1299 if (clusters[ilayer] > 0) {
1300 index = clusters[ilayer];
1301 cl = (AliTRDcluster *)GetCluster(index);
1302 //Double_t h01 = GetTiltFactor(cl); // I.B's fix
1303 //maxChi2=t.GetPredictedChi2(cl,h01); //
1308 //if (cl->GetNPads() < 5)
1309 Double_t dxsample = timeBin.GetdX();
1310 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1311 Double_t h01 = GetTiltFactor(cl);
1312 Int_t det = cl->GetDetector();
1313 Int_t plane = fGeom->GetPlane(det);
1314 if (t.GetX() > 345.0) {
1315 t.SetNLast(t.GetNLast() + 1);
1316 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1318 Double_t xcluster = cl->GetX();
1319 t.PropagateTo(xcluster,radLength,rho);
1320 maxChi2 = t.GetPredictedChi2(cl,h01);
1323 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1324 if (!t.Update(cl,maxChi2,index,h01)) {
1329 if (calibra->GetMITracking()) {
1330 calibra->UpdateHistograms(cl,&t);
1333 // Reset material budget if 2 consecutive gold
1335 if ((t.GetTracklets(plane).GetN() + t.GetTracklets(plane-1).GetN()) > 20) {
1346 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1347 Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
1348 if ((tracklet.GetChi2() < 18.0) &&
1351 (ratio0+ratio1 > 1.5) &&
1352 (t.GetNCross() == 0) &&
1353 (TMath::Abs(t.GetSnp()) < 0.85) &&
1354 (t.GetNumberOfClusters() > 20)){
1355 //if (ratio0 > 0.8) {
1356 t.MakeBackupTrack(); // Make backup of the track until is gold
1361 return expectedNumberOfClusters;
1364 //_____________________________________________________________________________
1365 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1368 // Starting from current radial position of track <t> this function
1369 // extrapolates the track up to radial position <xToGo>.
1370 // Returns 1 if track reaches the plane, and 0 otherwise
1373 const Double_t kEpsilon = 0.00001;
1374 //Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1375 Double_t xpos = t.GetX();
1376 Double_t dir = (xpos<xToGo) ? 1.0 : -1.0;
1378 while (((xToGo-xpos)*dir) > kEpsilon) {
1380 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1388 // Starting global position
1392 if (!t.GetProlongation(x,y,z)) {
1393 return 0; // No prolongation
1396 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1397 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1400 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1401 if (!t.PropagateTo(x,param[1],param[0])) {
1413 //_____________________________________________________________________________
1414 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1417 // Fills clusters into TRD tracking_sectors
1418 // Note that the numbering scheme for the TRD tracking_sectors
1419 // differs from that of TRD sectors
1422 if (ReadClusters(fClusters,cTree)) {
1423 AliError("Problem with reading the clusters !");
1426 Int_t ncl = fClusters->GetEntriesFast();
1428 AliInfo(Form("Sorting %d clusters",ncl));
1431 for (Int_t ichamber = 0; ichamber < 5; ichamber++) {
1432 for (Int_t isector = 0; isector < 18; isector++) {
1433 fHoles[ichamber][isector] = kTRUE;
1439 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1440 Int_t detector = c->GetDetector();
1441 Int_t localTimeBin = c->GetLocalTimeBin();
1442 Int_t sector = fGeom->GetSector(detector);
1443 Int_t plane = fGeom->GetPlane(detector);
1444 Int_t trackingSector = sector;
1446 //if (c->GetLabel(0) > 0) {
1447 if (c->GetQ() > 10) {
1448 Int_t chamber = fGeom->GetChamber(detector);
1449 fHoles[chamber][trackingSector] = kFALSE;
1452 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1456 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1460 // Apply pos correction
1462 fHXCl->Fill(c->GetX());
1464 fTrSec[trackingSector]->GetLayer(layer)->SetX(c->GetX());
1465 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1472 //_____________________________________________________________________________
1473 void AliTRDtracker::UnloadClusters()
1476 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1482 nentr = fClusters->GetEntriesFast();
1483 for (i = 0; i < nentr; i++) {
1484 delete fClusters->RemoveAt(i);
1488 nentr = fSeeds->GetEntriesFast();
1489 for (i = 0; i < nentr; i++) {
1490 delete fSeeds->RemoveAt(i);
1493 nentr = fTracks->GetEntriesFast();
1494 for (i = 0; i < nentr; i++) {
1495 delete fTracks->RemoveAt(i);
1498 Int_t nsec = AliTRDgeometry::kNsect;
1499 for (i = 0; i < nsec; i++) {
1500 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1501 fTrSec[i]->GetLayer(pl)->Clear();
1507 //_____________________________________________________________________________
1508 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESDEvent *esd)
1511 // Creates seeds using clusters between position inner plane and outer plane
1514 const Double_t kMaxTheta = 1.0;
1515 const Double_t kMaxPhi = 2.0;
1517 const Double_t kRoad0y = 6.0; // Road for middle cluster
1518 const Double_t kRoad0z = 8.5; // Road for middle cluster
1520 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1521 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1523 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1524 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1525 const Int_t kMaxSeed = 3000;
1527 Int_t maxSec = AliTRDgeometry::kNsect;
1529 // Linear fitters in planes
1530 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1531 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1532 fitterTC.StoreData(kTRUE);
1533 fitterT2.StoreData(kTRUE);
1534 AliRieman rieman(1000); // Rieman fitter
1535 AliRieman rieman2(1000); // Rieman fitter
1537 // Find the maximal and minimal layer for the planes
1539 AliTRDpropagationLayer *reflayers[6];
1540 for (Int_t i = 0; i < 6; i++) {
1541 layers[i][0] = 10000;
1544 for (Int_t ns = 0; ns < maxSec; ns++) {
1545 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1546 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(ilayer));
1550 Int_t det = layer[0]->GetDetector();
1551 Int_t plane = fGeom->GetPlane(det);
1552 if (ilayer < layers[plane][0]) {
1553 layers[plane][0] = ilayer;
1555 if (ilayer > layers[plane][1]) {
1556 layers[plane][1] = ilayer;
1561 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(0,0);
1562 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1563 Double_t hL[6]; // Tilting angle
1564 Double_t xcl[6]; // X - position of reference cluster
1565 Double_t ycl[6]; // Y - position of reference cluster
1566 Double_t zcl[6]; // Z - position of reference cluster
1568 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1569 Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
1571 Double_t chi2R = 0.0;
1572 Double_t chi2Z = 0.0;
1573 Double_t chi2RF = 0.0;
1574 Double_t chi2ZF = 0.0;
1576 Int_t nclusters; // Total number of clusters
1577 for (Int_t i = 0; i < 6; i++) {
1585 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1586 AliTRDseed *seed[kMaxSeed];
1587 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1588 seed[iseed]= &pseed[iseed*6];
1590 AliTRDseed *cseed = seed[0];
1592 Double_t seedquality[kMaxSeed];
1593 Double_t seedquality2[kMaxSeed];
1594 Double_t seedparams[kMaxSeed][7];
1595 Int_t seedlayer[kMaxSeed];
1596 Int_t registered = 0;
1597 Int_t sort[kMaxSeed];
1602 for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
1603 //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
1605 registered = 0; // Reset registerd seed counter
1606 cseed = seed[registered];
1609 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1610 //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
1613 Int_t dseed = 5 + Int_t(iter) * 3;
1615 // Initialize seeding layers
1616 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1617 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1618 xcl[ilayer] = reflayers[ilayer]->GetX();
1621 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1622 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1623 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1624 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1625 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1627 Int_t maxn3 = layer3;
1628 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1630 AliTRDcluster *cl3 = layer3[icl3];
1634 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
1635 ycl[sLayer+3] = cl3->GetY();
1636 zcl[sLayer+3] = cl3->GetZ();
1637 Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1638 Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1639 Int_t maxn0 = layer0;
1641 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1643 AliTRDcluster *cl0 = layer0[icl0];
1647 if (cl3->IsUsed() && cl0->IsUsed()) {
1650 ycl[sLayer+0] = cl0->GetY();
1651 zcl[sLayer+0] = cl0->GetZ();
1652 if (ycl[sLayer+0] > yymax0) {
1655 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1656 if (TMath::Abs(tanphi) > kMaxPhi) {
1659 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1660 if (TMath::Abs(tantheta) > kMaxTheta) {
1663 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
1665 // Expected position in 1 layer
1666 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
1667 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
1668 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1669 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1670 Int_t maxn1 = layer1;
1672 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1674 AliTRDcluster *cl1 = layer1[icl1];
1679 if (cl3->IsUsed()) nusedCl++;
1680 if (cl0->IsUsed()) nusedCl++;
1681 if (cl1->IsUsed()) nusedCl++;
1685 ycl[sLayer+1] = cl1->GetY();
1686 zcl[sLayer+1] = cl1->GetZ();
1687 if (ycl[sLayer+1] > yymax1) {
1690 if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
1693 if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
1696 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
1698 Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
1699 Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
1700 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1704 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1705 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
1706 ycl[sLayer+2] = cl2->GetY();
1707 zcl[sLayer+2] = cl2->GetZ();
1708 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
1713 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1714 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1715 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1716 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1720 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1721 cseed[iLayer].Reset();
1726 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1727 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1728 chi2Z += (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer])
1729 * (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer]);
1730 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1731 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1732 chi2R += (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer])
1733 * (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer]);
1734 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1736 if (TMath::Sqrt(chi2R) > 1.0/iter) {
1739 if (TMath::Sqrt(chi2Z) > 7.0/iter) {
1743 Float_t minmax[2] = { -100.0, 100.0 };
1744 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1745 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
1746 + 1.0 - cseed[sLayer+iLayer].GetZref(0);
1747 if (max < minmax[1]) {
1750 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
1751 - 1.0 - cseed[sLayer+iLayer].GetZref(0);
1752 if (min > minmax[0]) {
1757 Bool_t isFake = kFALSE;
1758 if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
1761 if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
1764 if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
1768 if (AliTRDReconstructor::StreamLevel() > 0) {
1769 if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
1770 TTreeSRedirector &cstream = *fDebugStreamer;
1772 << "isFake=" << isFake
1778 << "X0=" << xcl[sLayer+0]
1779 << "X1=" << xcl[sLayer+1]
1780 << "X2=" << xcl[sLayer+2]
1781 << "X3=" << xcl[sLayer+3]
1782 << "Y2exp=" << y2exp
1783 << "Z2exp=" << z2exp
1784 << "Chi2R=" << chi2R
1785 << "Chi2Z=" << chi2Z
1786 << "Seed0.=" << &cseed[sLayer+0]
1787 << "Seed1.=" << &cseed[sLayer+1]
1788 << "Seed2.=" << &cseed[sLayer+2]
1789 << "Seed3.=" << &cseed[sLayer+3]
1790 << "Zmin=" << minmax[0]
1791 << "Zmax=" << minmax[1]
1796 ////////////////////////////////////////////////////////////////////////////////////
1800 ////////////////////////////////////////////////////////////////////////////////////
1806 Bool_t isOK = kTRUE;
1808 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1810 cseed[sLayer+jLayer].SetTilt(hL[sLayer+jLayer]);
1811 cseed[sLayer+jLayer].SetPadLength(padlength[sLayer+jLayer]);
1812 cseed[sLayer+jLayer].SetX0(xcl[sLayer+jLayer]);
1814 for (Int_t iter = 0; iter < 2; iter++) {
1817 // In iteration 0 we try only one pad-row
1818 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1820 AliTRDseed tseed = cseed[sLayer+jLayer];
1821 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1823 roadz = padlength[sLayer+jLayer];
1826 Float_t quality = 10000.0;
1828 for (Int_t iTime = 2; iTime < 20; iTime++) {
1830 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1831 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1832 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1835 // Try 2 pad-rows in second iteration
1836 zexp = tseed.GetZref(0) + tseed.GetZref(1) * dxlayer;
1837 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1838 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
1840 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1841 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
1845 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1846 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1850 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1852 tseed.SetIndexes(iTime,index);
1853 tseed.SetClusters(iTime,cl); // Register cluster
1854 tseed.SetX(iTime,dxlayer); // Register cluster
1855 tseed.SetY(iTime,cl->GetY()); // Register cluster
1856 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1862 // Count the number of clusters and distortions into quality
1863 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1864 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1865 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1866 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1867 if ((iter == 0) && tseed.IsOK()) {
1868 cseed[sLayer+jLayer] = tseed;
1874 if (tseed.IsOK() && (tquality < quality)) {
1875 cseed[sLayer+jLayer] = tseed;
1880 if (!cseed[sLayer+jLayer].IsOK()) {
1885 cseed[sLayer+jLayer].CookLabels();
1886 cseed[sLayer+jLayer].UpdateUsed();
1887 nusedCl += cseed[sLayer+jLayer].GetNUsed();
1899 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1900 if (cseed[sLayer+iLayer].IsOK()) {
1901 nclusters += cseed[sLayer+iLayer].GetN2();
1907 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1908 rieman.AddPoint(xcl[sLayer+iLayer]
1909 ,cseed[sLayer+iLayer].GetYfitR(0)
1910 ,cseed[sLayer+iLayer].GetZProb()
1919 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1920 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1921 chi2R += (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0))
1922 * (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0));
1923 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1924 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1925 chi2Z += (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz())
1926 * (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz());
1927 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1929 Double_t curv = rieman.GetC();
1934 Double_t sumda = TMath::Abs(cseed[sLayer+0].GetYfitR(1) - cseed[sLayer+0].GetYref(1))
1935 + TMath::Abs(cseed[sLayer+1].GetYfitR(1) - cseed[sLayer+1].GetYref(1))
1936 + TMath::Abs(cseed[sLayer+2].GetYfitR(1) - cseed[sLayer+2].GetYref(1))
1937 + TMath::Abs(cseed[sLayer+3].GetYfitR(1) - cseed[sLayer+3].GetYref(1));
1938 Double_t likea = TMath::Exp(-sumda*10.6);
1939 Double_t likechi2 = 0.0000000001;
1941 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1943 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1944 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1945 Double_t like = likea * likechi2 * likechi2z * likeN;
1946 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetYref(1) - 130.0*curv) * 1.9);
1947 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetZref(1)
1948 - cseed[sLayer+0].GetZref(0) / xcl[sLayer+0]) * 5.9);
1949 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1951 seedquality[registered] = like;
1952 seedlayer[registered] = sLayer;
1953 if (TMath::Log(0.000000000000001 + like) < -15) {
1956 AliTRDseed seedb[6];
1957 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1958 seedb[iLayer] = cseed[iLayer];
1961 ////////////////////////////////////////////////////////////////////////////////////
1963 // Full track fit part
1965 ////////////////////////////////////////////////////////////////////////////////////
1972 // Add new layers - avoid long extrapolation
1974 Int_t tLayer[2] = { 0, 0 };
1988 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1989 Int_t jLayer = tLayer[iLayer]; // Set tracking layer
1990 cseed[jLayer].Reset();
1991 cseed[jLayer].SetTilt(hL[jLayer]);
1992 cseed[jLayer].SetPadLength(padlength[jLayer]);
1993 cseed[jLayer].SetX0(xcl[jLayer]);
1994 // Get pad length and rough cluster
1995 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].GetYref(0)
1996 ,cseed[jLayer].GetZref(0)
1999 if (indexdummy <= 0) {
2002 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
2003 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
2005 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2007 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2009 Int_t jLayer = tLayer[iLayer]; // set tracking layer
2010 if ((jLayer == 0) && !(cseed[1].IsOK())) {
2011 continue; // break not allowed
2013 if ((jLayer == 5) && !(cseed[4].IsOK())) {
2014 continue; // break not allowed
2016 Float_t zexp = cseed[jLayer].GetZref(0);
2017 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
2019 for (Int_t iter = 0; iter < 2; iter++) {
2021 AliTRDseed tseed = cseed[jLayer];
2022 Float_t quality = 10000.0;
2024 for (Int_t iTime = 2; iTime < 20; iTime++) {
2025 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
2026 Double_t dxlayer = layer.GetX()-xcl[jLayer];
2027 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
2028 Float_t yroad = kRoad1y;
2029 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
2033 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2034 tseed.SetIndexes(iTime,index);
2035 tseed.SetClusters(iTime,cl); // Register cluster
2036 tseed.SetX(iTime,dxlayer); // Register cluster
2037 tseed.SetY(iTime,cl->GetY()); // Register cluster
2038 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2043 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2044 Float_t tquality = (18.0 - tseed.GetN2())/2.0 + TMath::Abs(dangle) / 0.1
2045 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
2046 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2047 if (tquality < quality) {
2048 cseed[jLayer] = tseed;
2057 if ( cseed[jLayer].IsOK()) {
2058 cseed[jLayer].CookLabels();
2059 cseed[jLayer].UpdateUsed();
2060 nusedf += cseed[jLayer].GetNUsed();
2061 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2067 AliTRDseed bseed[6];
2068 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2069 bseed[jLayer] = cseed[jLayer];
2071 Float_t lastquality = 10000.0;
2072 Float_t lastchi2 = 10000.0;
2073 Float_t chi2 = 1000.0;
2075 for (Int_t iter = 0; iter < 4; iter++) {
2077 // Sort tracklets according "quality", try to "improve" 4 worst
2078 Float_t sumquality = 0.0;
2079 Float_t squality[6];
2080 Int_t sortindexes[6];
2082 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2083 if (bseed[jLayer].IsOK()) {
2084 AliTRDseed &tseed = bseed[jLayer];
2085 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2086 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2087 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
2088 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2089 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2090 squality[jLayer] = tquality;
2093 squality[jLayer] = -1.0;
2095 sumquality +=squality[jLayer];
2098 if ((sumquality >= lastquality) ||
2099 (chi2 > lastchi2)) {
2102 lastquality = sumquality;
2105 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2106 cseed[jLayer] = bseed[jLayer];
2109 TMath::Sort(6,squality,sortindexes,kFALSE);
2111 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
2113 Int_t bLayer = sortindexes[jLayer];
2114 AliTRDseed tseed = bseed[bLayer];
2116 for (Int_t iTime = 2; iTime < 20; iTime++) {
2118 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
2119 Double_t dxlayer = layer.GetX() - xcl[bLayer];
2120 Double_t zexp = tseed.GetZref(0);
2121 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2122 Float_t roadz = padlength[bLayer] + 1;
2123 if (TMath::Abs(tseed.GetZProb() - zexp) > 0.5*padlength[bLayer]) {
2124 roadz = padlength[bLayer] * 0.5;
2126 if (tseed.GetZfit(1)*tseed.GetZref(1) < 0.0) {
2127 roadz = padlength[bLayer] * 0.5;
2129 if (TMath::Abs(tseed.GetZProb() - zexp) < 0.1*padlength[bLayer]) {
2130 zexp = tseed.GetZProb();
2131 roadz = padlength[bLayer] * 0.5;
2134 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer - zcor;
2135 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
2139 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2141 tseed.SetIndexes(iTime,index);
2142 tseed.SetClusters(iTime,cl); // Register cluster
2143 tseed.SetX(iTime,dxlayer); // Register cluster
2144 tseed.SetY(iTime,cl->GetY()); // Register cluster
2145 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2151 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2152 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2153 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0
2154 + TMath::Abs(dangle) / 0.1
2155 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2156 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2157 if (tquality<squality[bLayer]) {
2158 bseed[bLayer] = tseed;
2164 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
2171 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2172 if (TMath::Abs(cseed[iLayer].GetYref(0) / cseed[iLayer].GetX0()) < 0.15) {
2175 if (cseed[iLayer].IsOK()) {
2176 nclusters += cseed[iLayer].GetN2();
2184 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2185 if (cseed[iLayer].IsOK()) {
2186 rieman.AddPoint(xcl[iLayer]
2187 ,cseed[iLayer].GetYfitR(0)
2188 ,cseed[iLayer].GetZProb()
2197 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2198 if (cseed[iLayer].IsOK()) {
2199 cseed[iLayer].SetYref(0,rieman.GetYat(xcl[iLayer]));
2200 chi2RF += (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0))
2201 * (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0));
2202 cseed[iLayer].SetYref(1,rieman.GetDYat(xcl[iLayer]));
2203 cseed[iLayer].SetZref(0,rieman.GetZat(xcl[iLayer]));
2204 chi2ZF += (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz())
2205 * (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz());
2206 cseed[iLayer].SetZref(1,rieman.GetDZat(xcl[iLayer]));
2209 chi2RF /= TMath::Max((nlayers - 3.0),1.0);
2210 chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
2211 curv = rieman.GetC();
2213 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
2214 Double_t dzmf = rieman.GetDZat(xref2);
2215 Double_t zmf = rieman.GetZat(xref2);
2221 fitterTC.ClearPoints();
2222 fitterT2.ClearPoints();
2225 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2227 if (!cseed[iLayer].IsOK()) {
2231 for (Int_t itime = 0; itime < 25; itime++) {
2233 if (!cseed[iLayer].IsUsable(itime)) {
2236 // X relative to the middle chamber
2237 Double_t x = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0() - xref2;
2238 Double_t y = cseed[iLayer].GetY(itime);
2239 Double_t z = cseed[iLayer].GetZ(itime);
2240 // ExB correction to the correction
2244 Double_t x2 = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0();
2245 Double_t t = 1.0 / (x2*x2 + y*y);
2247 uvt[0] = 2.0 * x2 * uvt[1]; // u
2248 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
2249 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
2250 uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
2251 Double_t error = 2.0 * 0.2 * uvt[1];
2252 fitterT2.AddPoint(uvt,uvt[4],error);
2255 // Constrained rieman
2257 z = cseed[iLayer].GetZ(itime);
2258 uvt[0] = 2.0 * x2 * t; // u
2259 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
2260 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
2261 fitterTC.AddPoint(uvt,uvt[2],error);
2262 rieman2.AddPoint(x2,y,z,1,10);
2272 Double_t rpolz0 = fitterT2.GetParameter(3);
2273 Double_t rpolz1 = fitterT2.GetParameter(4);
2276 // Linear fitter - not possible to make boundaries
2277 // Do not accept non possible z and dzdx combinations
2279 Bool_t acceptablez = kTRUE;
2280 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2281 if (cseed[iLayer].IsOK()) {
2282 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2283 if (TMath::Abs(cseed[iLayer].GetZProb() - zT2) > padlength[iLayer] * 0.5 + 1.0) {
2284 acceptablez = kFALSE;
2289 fitterT2.FixParameter(3,zmf);
2290 fitterT2.FixParameter(4,dzmf);
2292 fitterT2.ReleaseParameter(3);
2293 fitterT2.ReleaseParameter(4);
2294 rpolz0 = fitterT2.GetParameter(3);
2295 rpolz1 = fitterT2.GetParameter(4);
2298 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2299 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2300 Double_t polz1c = fitterTC.GetParameter(2);
2301 Double_t polz0c = polz1c * xref2;
2302 Double_t aC = fitterTC.GetParameter(0);
2303 Double_t bC = fitterTC.GetParameter(1);
2304 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2305 Double_t aR = fitterT2.GetParameter(0);
2306 Double_t bR = fitterT2.GetParameter(1);
2307 Double_t dR = fitterT2.GetParameter(2);
2308 Double_t cR = 1.0 + bR*bR - dR*aR;
2311 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2312 cR = aR / TMath::Sqrt(cR);
2315 Double_t chi2ZT2 = 0.0;
2316 Double_t chi2ZTC = 0.0;
2317 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2318 if (cseed[iLayer].IsOK()) {
2319 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2320 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2321 chi2ZT2 += TMath::Abs(cseed[iLayer].GetMeanz() - zT2);
2322 chi2ZTC += TMath::Abs(cseed[iLayer].GetMeanz() - zTC);
2325 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2326 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2328 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2329 Float_t sumdaf = 0.0;
2330 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2331 if (cseed[iLayer].IsOK()) {
2332 sumdaf += TMath::Abs((cseed[iLayer].GetYfit(1) - cseed[iLayer].GetYref(1))
2333 / cseed[iLayer].GetSigmaY2());
2336 sumdaf /= Float_t (nlayers - 2.0);
2339 // Likelihoods for full track
2341 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2342 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2343 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2344 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2345 seedquality2[registered] = likezf * likechi2TR * likeaf;
2347 // Still needed ????
2348 // Bool_t isGold = kFALSE;
2350 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2351 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2352 // if (isGold &&nusedf<10){
2353 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2354 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2355 // seed[index][jLayer].UseClusters(); //sign gold
2360 if (!cseed[0].IsOK()) {
2362 if (!cseed[1].IsOK()) {
2366 seedparams[registered][0] = cseed[index0].GetX0();
2367 seedparams[registered][1] = cseed[index0].GetYref(0);
2368 seedparams[registered][2] = cseed[index0].GetZref(0);
2369 seedparams[registered][5] = cR;
2370 seedparams[registered][3] = cseed[index0].GetX0() * cR - TMath::Sin(TMath::ATan(cseed[0].GetYref(1)));
2371 seedparams[registered][4] = cseed[index0].GetZref(1)
2372 / TMath::Sqrt(1.0 + cseed[index0].GetYref(1) * cseed[index0].GetYref(1));
2373 seedparams[registered][6] = ns;
2378 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2379 if (!cseed[iLayer].IsOK()) {
2382 if (cseed[iLayer].GetLabels(0) >= 0) {
2383 labels[nlab] = cseed[iLayer].GetLabels(0);
2386 if (cseed[iLayer].GetLabels(1) >= 0) {
2387 labels[nlab] = cseed[iLayer].GetLabels(1);
2391 Freq(nlab,labels,outlab,kFALSE);
2392 Int_t label = outlab[0];
2393 Int_t frequency = outlab[1];
2394 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2395 cseed[iLayer].SetFreq(frequency);
2396 cseed[iLayer].SetC(cR);
2397 cseed[iLayer].SetCC(cC);
2398 cseed[iLayer].SetChi2(chi2TR);
2399 cseed[iLayer].SetChi2Z(chi2ZF);
2403 if (1 || (!isFake)) {
2404 Float_t zvertex = GetZ();
2405 TTreeSRedirector &cstream = *fDebugStreamer;
2406 if (AliTRDReconstructor::StreamLevel() > 0) {
2408 << "isFake=" << isFake
2409 << "Vertex=" << zvertex
2410 << "Rieman2.=" << &rieman2
2411 << "Rieman.=" << &rieman
2419 << "Chi2R=" << chi2R
2420 << "Chi2Z=" << chi2Z
2421 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2422 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2423 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2424 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2425 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2426 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2427 << "C=" << curv // Non constrained - no tilt correction
2428 << "DR=" << dR // DR parameter - tilt correction
2429 << "DCA=" << dca // DCA - tilt correction
2430 << "CR=" << cR // Non constrained curvature - tilt correction
2431 << "CC=" << cC // Constrained curvature
2432 << "Polz0=" << polz0c
2433 << "Polz1=" << polz1c
2434 << "RPolz0=" << rpolz0
2435 << "RPolz1=" << rpolz1
2436 << "Ncl=" << nclusters
2437 << "Nlayers=" << nlayers
2438 << "NUsedS=" << nusedCl
2439 << "NUsed=" << nusedf
2440 << "Findable=" << findable
2442 << "LikePrim=" << likePrim
2443 << "Likechi2C=" << likechi2C
2444 << "Likechi2TR=" << likechi2TR
2445 << "Likezf=" << likezf
2446 << "LikeF=" << seedquality2[registered]
2447 << "S0.=" << &cseed[0]
2448 << "S1.=" << &cseed[1]
2449 << "S2.=" << &cseed[2]
2450 << "S3.=" << &cseed[3]
2451 << "S4.=" << &cseed[4]
2452 << "S5.=" << &cseed[5]
2453 << "SB0.=" << &seedb[0]
2454 << "SB1.=" << &seedb[1]
2455 << "SB2.=" << &seedb[2]
2456 << "SB3.=" << &seedb[3]
2457 << "SB4.=" << &seedb[4]
2458 << "SB5.=" << &seedb[5]
2459 << "Label=" << label
2460 << "Freq=" << frequency
2461 << "sLayer=" << sLayer
2466 if (registered<kMaxSeed - 1) {
2468 cseed = seed[registered];
2471 } // End of loop over layer 1
2473 } // End of loop over layer 0
2475 } // End of loop over layer 3
2477 } // End of loop over seeding time bins
2483 TMath::Sort(registered,seedquality2,sort,kTRUE);
2484 Bool_t signedseed[kMaxSeed];
2485 for (Int_t i = 0; i < registered; i++) {
2486 signedseed[i] = kFALSE;
2489 for (Int_t iter = 0; iter < 5; iter++) {
2491 for (Int_t iseed = 0; iseed < registered; iseed++) {
2493 Int_t index = sort[iseed];
2494 if (signedseed[index]) {
2497 Int_t labelsall[1000];
2498 Int_t nlabelsall = 0;
2499 Int_t naccepted = 0;;
2500 Int_t sLayer = seedlayer[index];
2506 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2508 if (TMath::Abs(seed[index][jLayer].GetYref(0) / xcl[jLayer]) < 0.15) {
2511 if (seed[index][jLayer].IsOK()) {
2512 seed[index][jLayer].UpdateUsed();
2513 ncl +=seed[index][jLayer].GetN2();
2514 nused +=seed[index][jLayer].GetNUsed();
2517 for (Int_t itime = 0; itime < 25; itime++) {
2518 if (seed[index][jLayer].IsUsable(itime)) {
2520 for (Int_t ilab = 0; ilab < 3; ilab++) {
2521 Int_t tindex = seed[index][jLayer].GetClusters(itime)->GetLabel(ilab);
2523 labelsall[nlabelsall] = tindex;
2541 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2547 if (nlayers < findable) {
2550 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
2556 if ((nlayers == findable) ||
2560 if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
2566 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2572 if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
2577 signedseed[index] = kTRUE;
2582 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2583 if (seed[index][iLayer].IsOK()) {
2584 if (seed[index][iLayer].GetLabels(0) >= 0) {
2585 labels[nlab] = seed[index][iLayer].GetLabels(0);
2588 if (seed[index][iLayer].GetLabels(1) >= 0) {
2589 labels[nlab] = seed[index][iLayer].GetLabels(1);
2594 Freq(nlab,labels,outlab,kFALSE);
2595 Int_t label = outlab[0];
2596 Int_t frequency = outlab[1];
2597 Freq(nlabelsall,labelsall,outlab,kFALSE);
2598 Int_t label1 = outlab[0];
2599 Int_t label2 = outlab[2];
2600 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2601 Float_t ratio = Float_t(nused) / Float_t(ncl);
2603 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2604 if ((seed[index][jLayer].IsOK()) &&
2605 (TMath::Abs(seed[index][jLayer].GetYfit(1) - seed[index][jLayer].GetYfit(1)) < 0.2)) {
2606 seed[index][jLayer].UseClusters(); // Sign gold
2611 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.
2612 TTreeSRedirector &cstream = *fDebugStreamer;
2617 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2623 AliESDtrack esdtrack;
2624 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2625 esdtrack.SetLabel(label);
2626 esd->AddTrack(&esdtrack);
2627 TTreeSRedirector &cstream = *fDebugStreamer;
2628 if (AliTRDReconstructor::StreamLevel() > 0) {
2630 << "EventNrInFile=" << eventNrInFile
2631 << "ESD.=" << &esdtrack
2633 << "trdback.=" << track
2638 if (AliTRDReconstructor::StreamLevel() > 0) {
2641 << "Track.=" << track
2642 << "Like=" << seedquality[index]
2643 << "LikeF=" << seedquality2[index]
2644 << "S0.=" << &seed[index][0]
2645 << "S1.=" << &seed[index][1]
2646 << "S2.=" << &seed[index][2]
2647 << "S3.=" << &seed[index][3]
2648 << "S4.=" << &seed[index][4]
2649 << "S5.=" << &seed[index][5]
2650 << "Label=" << label
2651 << "Label1=" << label1
2652 << "Label2=" << label2
2653 << "FakeRatio=" << fakeratio
2654 << "Freq=" << frequency
2656 << "Nlayers=" << nlayers
2657 << "Findable=" << findable
2658 << "NUsed=" << nused
2659 << "sLayer=" << sLayer
2660 << "EventNrInFile=" << eventNrInFile
2668 } // End of loop over sectors
2674 //_____________________________________________________________________________
2675 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *clusterTree) const
2678 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2679 // from the file. The names of the cluster tree and branches
2680 // should match the ones used in AliTRDclusterizer::WriteClusters()
2683 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2684 TObjArray *clusterArray = new TObjArray(nsize+1000);
2686 TBranch *branch = clusterTree->GetBranch("TRDcluster");
2688 AliError("Can't get the branch !");
2691 branch->SetAddress(&clusterArray);
2693 // Loop through all entries in the tree
2694 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2696 AliTRDcluster *c = 0;
2697 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2700 nbytes += clusterTree->GetEvent(iEntry);
2702 // Get the number of points in the detector
2703 Int_t nCluster = clusterArray->GetEntriesFast();
2705 // Loop through all TRD digits
2706 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2707 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2708 AliTRDcluster *co = c;
2710 clusterArray->RemoveAt(iCluster);
2715 delete clusterArray;
2721 //_____________________________________________________________________________
2722 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2725 // Get track space point with index i
2726 // Origin: C.Cheshkov
2729 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2730 Int_t idet = cl->GetDetector();
2731 Int_t isector = fGeom->GetSector(idet);
2732 Int_t ichamber = fGeom->GetChamber(idet);
2733 Int_t iplan = fGeom->GetPlane(idet);
2735 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2736 local[1] = cl->GetY();
2737 local[2] = cl->GetZ();
2739 fGeom->RotateBack(idet,local,global);
2740 p.SetXYZ(global[0],global[1],global[2]);
2741 AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
2744 iLayer = AliGeomManager::kTRD1;
2747 iLayer = AliGeomManager::kTRD2;
2750 iLayer = AliGeomManager::kTRD3;
2753 iLayer = AliGeomManager::kTRD4;
2756 iLayer = AliGeomManager::kTRD5;
2759 iLayer = AliGeomManager::kTRD6;
2762 Int_t modId = isector * fGeom->Ncham() + ichamber;
2763 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
2764 p.SetVolumeID(volid);
2770 //_____________________________________________________________________________
2771 void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
2774 // This cooks a label. Mmmmh, smells good...
2777 Int_t label = 123456789;
2781 Int_t ncl = pt->GetNumberOfClusters();
2783 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2787 Int_t **s = new Int_t* [kRange];
2788 for (i = 0; i < kRange; i++) {
2789 s[i] = new Int_t[2];
2791 for (i = 0; i < kRange; i++) {
2800 for (i = 0; i < ncl; i++) {
2801 index = pt->GetClusterIndex(i);
2802 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2808 for (i = 0; i < ncl; i++) {
2809 index = pt->GetClusterIndex(i);
2810 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2811 for (Int_t k = 0; k < 3; k++) {
2812 label = c->GetLabel(k);
2813 labelAdded = kFALSE;
2816 while ((!labelAdded) && (j < kRange)) {
2817 if ((s[j][0] == label) ||
2820 s[j][1] = s[j][1] + 1;
2832 for (i = 0; i < kRange; i++) {
2833 if (s[i][1] > max) {
2839 for (i = 0; i < kRange; i++) {
2845 if ((1.0 - Float_t(max)/ncl) > wrong) {
2849 pt->SetLabel(label);
2853 //_____________________________________________________________________________
2854 void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
2857 // Use clusters, but don't abuse them!
2860 const Float_t kmaxchi2 = 18;
2861 const Float_t kmincl = 10;
2863 AliTRDtrack *track = (AliTRDtrack *) t;
2865 Int_t ncl = t->GetNumberOfClusters();
2866 for (Int_t i = from; i < ncl; i++) {
2867 Int_t index = t->GetClusterIndex(i);
2868 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2869 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2870 if (track->GetTracklets(iplane).GetChi2() > kmaxchi2) {
2873 if (track->GetTracklets(iplane).GetN() < kmincl) {
2876 if (!(c->IsUsed())) {
2883 //_____________________________________________________________________________
2884 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2887 // Parametrised "expected" error of the cluster reconstruction in Y
2890 Double_t s = 0.08 * 0.08;
2895 //_____________________________________________________________________________
2896 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2899 // Parametrised "expected" error of the cluster reconstruction in Z
2902 Double_t s = 9.0 * 9.0 / 12.0;
2907 //_____________________________________________________________________________
2908 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2911 // Returns radial position which corresponds to time bin <localTB>
2912 // in tracking sector <sector> and plane <plane>
2915 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2916 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2918 return fTrSec[sector]->GetLayer(pl)->GetX();
2922 //_____________________________________________________________________________
2923 AliTRDtracker::AliTRDpropagationLayer
2924 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2925 , Double_t radLength, Int_t tbIndex, Int_t plane)
2934 ,fTimeBinIndex(tbIndex)
2947 // AliTRDpropagationLayer constructor
2950 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2955 if (fTimeBinIndex >= 0) {
2956 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2957 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2960 for (Int_t i = 0; i < 5; i++) {
2961 fIsHole[i] = kFALSE;
2966 //_____________________________________________________________________________
2967 void AliTRDtracker::AliTRDpropagationLayer
2968 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2969 , Double_t radLength, Double_t Yc, Double_t Zc)
2972 // Sets hole in the layer
2981 fHoleX0 = radLength;
2985 //_____________________________________________________________________________
2986 AliTRDtracker::AliTRDtrackingSector
2987 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
2993 // AliTRDtrackingSector Constructor
2996 AliTRDpadPlane *padPlane = 0;
2997 AliTRDpropagationLayer *ppl = 0;
2999 // Get holes description from geometry
3000 Bool_t holes[AliTRDgeometry::kNcham];
3001 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3002 holes[icham] = fGeom->IsHole(0,icham,gs);
3005 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
3006 fTimeBinIndex[i] = -1;
3014 // Add layers for each of the planes
3015 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
3016 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
3018 const Int_t kNchambers = AliTRDgeometry::Ncham();
3021 Double_t ymaxsensitive = 0;
3022 Double_t *zc = new Double_t[kNchambers];
3023 Double_t *zmax = new Double_t[kNchambers];
3024 Double_t *zmaxsensitive = new Double_t[kNchambers];
3026 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3028 ymax = fGeom->GetChamberWidth(plane) / 2.0;
3029 padPlane = fGeom->GetPadPlane(plane,0);
3030 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
3032 for (Int_t ch = 0; ch < kNchambers; ch++) {
3033 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
3034 Float_t pad = padPlane->GetRowSize(1);
3035 Float_t row0 = fGeom->GetRow0(plane,ch,0);
3036 Int_t nPads = fGeom->GetRowMax(plane,ch,0);
3037 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
3038 zc[ch] = -(pad * nPads) / 2.0 + row0;
3041 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
3042 / AliTRDCommonParam::Instance()->GetSamplingFrequency();
3043 rho = 0.00295 * 0.85; //????
3046 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
3047 //Double_t xbottom = x0 - dxDrift;
3048 //Double_t xtop = x0 + dxAmp;
3050 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3051 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
3053 Double_t xlayer = iTime * dx - dxAmp;
3054 //if (xlayer<0) xlayer = dxAmp / 2.0;
3057 tbIndex = CookTimeBinIndex(plane,iTime);
3058 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
3059 ppl->SetYmax(ymax,ymaxsensitive);
3060 ppl->SetZ(zc,zmax,zmaxsensitive);
3061 ppl->SetHoles(holes);
3072 delete [] zmaxsensitive;
3076 //_____________________________________________________________________________
3077 AliTRDtracker::AliTRDtrackingSector
3078 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
3089 //_____________________________________________________________________________
3090 Int_t AliTRDtracker::AliTRDtrackingSector
3091 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
3094 // depending on the digitization parameters calculates "global"
3095 // time bin index for timebin <localTB> in plane <plane>
3099 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3100 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
3112 //_____________________________________________________________________________
3113 void AliTRDtracker::AliTRDtrackingSector
3114 ::MapTimeBinLayers()
3117 // For all sensitive time bins sets corresponding layer index
3118 // in the array fTimeBins
3123 for (Int_t i = 0; i < fN; i++) {
3125 index = fLayers[i]->GetTimeBinIndex();
3130 if (index >= (Int_t) kMaxTimeBinIndex) {
3131 //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
3132 // ,index,kMaxTimeBinIndex-1));
3136 fTimeBinIndex[index] = i;
3142 //_____________________________________________________________________________
3143 Int_t AliTRDtracker::AliTRDtrackingSector
3144 ::GetLayerNumber(Double_t x) const
3147 // Returns the number of time bin which in radial position is closest to <x>
3150 if (x >= fLayers[fN-1]->GetX()) {
3153 if (x <= fLayers[ 0]->GetX()) {
3159 Int_t m = (b + e) / 2;
3161 for ( ; b < e; m = (b + e) / 2) {
3162 if (x > fLayers[m]->GetX()) {
3170 if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
3179 //_____________________________________________________________________________
3180 Int_t AliTRDtracker::AliTRDtrackingSector
3181 ::GetInnerTimeBin() const
3184 // Returns number of the innermost SENSITIVE propagation layer
3187 return GetLayerNumber(0);
3191 //_____________________________________________________________________________
3192 Int_t AliTRDtracker::AliTRDtrackingSector
3193 ::GetOuterTimeBin() const
3196 // Returns number of the outermost SENSITIVE time bin
3199 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3203 //_____________________________________________________________________________
3204 Int_t AliTRDtracker::AliTRDtrackingSector
3205 ::GetNumberOfTimeBins() const
3208 // Returns number of SENSITIVE time bins
3214 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
3215 layer = GetLayerNumber(tb);
3225 //_____________________________________________________________________________
3226 void AliTRDtracker::AliTRDtrackingSector
3227 ::InsertLayer(AliTRDpropagationLayer *pl)
3230 // Insert layer <pl> in fLayers array.
3231 // Layers are sorted according to X coordinate.
3234 if (fN == ((Int_t) kMaxLayersPerSector)) {
3235 //AliWarning("Too many layers !\n");
3244 Int_t i = Find(pl->GetX());
3246 memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3253 //_____________________________________________________________________________
3254 Int_t AliTRDtracker::AliTRDtrackingSector
3255 ::Find(Double_t x) const
3258 // Returns index of the propagation layer nearest to X
3261 if (x <= fLayers[0]->GetX()) {
3265 if (x > fLayers[fN-1]->GetX()) {
3271 Int_t m = (b + e) / 2;
3273 for (; b < e; m = (b + e) / 2) {
3274 if (x > fLayers[m]->GetX()) {
3286 //_____________________________________________________________________________
3287 void AliTRDtracker::AliTRDpropagationLayer
3288 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3291 // set centers and the width of sectors
3294 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3295 fZc[icham] = center[icham];
3296 fZmax[icham] = w[icham];
3297 fZmaxSensitive[icham] = wsensitive[icham];
3302 //_____________________________________________________________________________
3303 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3306 // set centers and the width of sectors
3311 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3312 fIsHole[icham] = holes[icham];
3320 //_____________________________________________________________________________
3321 void AliTRDtracker::AliTRDpropagationLayer
3322 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3325 // Insert cluster in cluster array.
3326 // Clusters are sorted according to Y coordinate.
3329 if (fTimeBinIndex < 0) {
3330 //AliWarning("Attempt to insert cluster into non-sensitive time bin!\n");
3334 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3335 //AliWarning("Too many clusters !\n");
3341 fClusters[fN++] = c;
3345 Int_t i = Find(c->GetY());
3346 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3347 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3354 //_____________________________________________________________________________
3355 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3358 // Returns index of the cluster nearest in Y
3364 if (y <= fClusters[0]->GetY()) {
3367 if (y > fClusters[fN-1]->GetY()) {
3373 Int_t m = (b + e) / 2;
3375 for ( ; b < e; m = (b + e) / 2) {
3376 if (y > fClusters[m]->GetY()) {
3388 //_____________________________________________________________________________
3389 Int_t AliTRDtracker::AliTRDpropagationLayer
3390 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3391 , Float_t maxroadz) const
3394 // Returns index of the cluster nearest to the given y,z
3399 Float_t mindist = maxroad;
3401 for (Int_t i = Find(y-maxroad); i < maxn; i++) {
3402 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3403 Float_t ycl = c->GetY();
3404 if (ycl > (y + maxroad)) {
3407 if (TMath::Abs(c->GetZ() - z) > maxroadz) {
3410 if (TMath::Abs(ycl - y) < mindist) {
3411 mindist = TMath::Abs(ycl - y);
3420 //_____________________________________________________________________________
3421 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
3424 // Returns correction factor for tilted pads geometry
3427 Int_t det = c->GetDetector();
3428 Int_t plane = fGeom->GetPlane(det);
3429 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(plane,0);
3430 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3440 //_____________________________________________________________________________
3441 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack &TRDtrack)
3444 // This is setting fdEdxPlane and fTimBinPlane
3445 // Sums up the charge in each plane for track TRDtrack and also get the
3446 // Time bin for Max. Cluster
3447 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
3450 Double_t clscharge[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3451 Double_t maxclscharge[AliESDtrack::kNPlane];
3452 Int_t nCluster[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3453 Int_t timebin[AliESDtrack::kNPlane];
3455 // Initialization of cluster charge per plane.
3456 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3457 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3458 clscharge[iPlane][iSlice] = 0.0;
3459 nCluster[iPlane][iSlice] = 0;
3463 // Initialization of cluster charge per plane.
3464 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3465 timebin[iPlane] = -1;
3466 maxclscharge[iPlane] = 0.0;
3469 // Loop through all clusters associated to track TRDtrack
3470 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
3471 for (Int_t iClus = 0; iClus < nClus; iClus++) {
3472 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
3473 Int_t index = TRDtrack.GetClusterIndex(iClus);
3474 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
3478 Int_t tb = pTRDcluster->GetLocalTimeBin();
3482 Int_t detector = pTRDcluster->GetDetector();
3483 Int_t iPlane = fGeom->GetPlane(detector);
3484 if (iPlane >= AliESDtrack::kNPlane) {
3485 AliError(Form("Wrong plane %d",iPlane));
3488 Int_t iSlice = tb * AliESDtrack::kNSlice
3489 / AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3490 if (iSlice >= AliESDtrack::kNSlice) {
3491 AliError(Form("Wrong slice %d",iSlice));
3494 clscharge[iPlane][iSlice] = clscharge[iPlane][iSlice] + charge;
3495 if (charge > maxclscharge[iPlane]) {
3496 maxclscharge[iPlane] = charge;
3497 timebin[iPlane] = tb;
3499 nCluster[iPlane][iSlice]++;
3500 } // End of loop over cluster
3502 // Setting the fdEdxPlane and fTimBinPlane variabales
3503 Double_t totalCharge = 0.0;
3505 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3506 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3507 if (nCluster[iPlane][iSlice]) {
3508 clscharge[iPlane][iSlice] /= nCluster[iPlane][iSlice];
3510 TRDtrack.SetPIDsignals(clscharge[iPlane][iSlice],iPlane,iSlice);
3511 totalCharge = totalCharge+clscharge[iPlane][iSlice];
3513 TRDtrack.SetPIDTimBin(timebin[iPlane],iPlane);
3516 // Still needed ????
3518 // Int_t nc=TRDtrack.GetNumberOfClusters();
3520 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
3522 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3523 // TRDtrack.SetPIDsignals(dedx, iPlane);
3524 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
3529 //_____________________________________________________________________________
3530 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3531 , AliTRDtrack *track
3532 , Int_t *clusters, AliTRDtracklet &tracklet)
3536 // Try to find nearest clusters to the track in timebins from t0 to t1
3538 // Correction coeficients - depend on TRD parameters - to be changed accordingly
3544 Double_t xmean = 0.0; // Reference x
3545 Double_t dz[10][100];
3546 Double_t dy[10][100];
3550 Int_t indexes[10][100]; // Indexes of the clusters in the road
3551 Int_t best[10][100]; // Index of best matching cluster
3552 AliTRDcluster *cl[10][100]; // Pointers to the clusters in the road
3554 for (Int_t it = 0; it < 100; it++) {
3561 for (Int_t ih = 0; ih < 10;ih++) {
3562 indexes[ih][it] = -2; // Reset indexes1
3564 dz[ih][it] = -100.0;
3565 dy[ih][it] = -100.0;
3570 Double_t x0 = track->GetX();
3571 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3576 Int_t detector = -1;
3577 Float_t padlength = 0.0;
3578 AliTRDtrack track2(* track);
3579 Float_t snpy = track->GetSnp();
3580 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3585 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
3586 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3587 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3593 for (Int_t it = 0; it < t1-t0; it++) {
3595 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3596 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
3598 continue; // No indexes1
3601 Int_t maxn = timeBin;
3602 x[it] = timeBin.GetX();
3603 track2.PropagateTo(x[it]);
3604 yt[it] = track2.GetY();
3605 zt[it] = track2.GetZ();
3607 Double_t y = yt[it];
3608 Double_t z = zt[it];
3609 Double_t chi2 = 1000000.0;
3613 // Find 2 nearest cluster at given time bin
3615 int checkPoint[4] = {0,0,0,0};
3616 double minY = 123456789;
3617 double minD[2] = {1,1};
3619 for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
3620 //for (Int_t i = 0; i < maxn; i++) {
3622 AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
3623 h01 = GetTiltFactor(c);
3625 Int_t det = c->GetDetector();
3626 plane = fGeom->GetPlane(det);
3627 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3630 //if (c->GetLocalTimeBin()==0) continue;
3631 if (c->GetY() > (y + road)) {
3635 fHDeltaX->Fill(c->GetX() - x[it]);
3636 //printf("%f\t%f\t%f \n", c->GetX(), x[it], c->GetX()-x[it]);
3638 if (TMath::Abs(c->GetY()-y) < TMath::Abs(minY)) {
3640 minD[0] = c->GetY()-y;
3641 minD[1] = c->GetZ()-z;
3646 fHMinZ->Fill(c->GetZ() - z);
3647 if ((c->GetZ() - z) * (c->GetZ() - z) > 2 * (12.0 * sz2)) {
3652 Double_t dist = TMath::Abs(c->GetZ() - z);
3653 if (dist > (0.5 * padlength + 6.0 * sigmaz)) { // 0.5
3654 continue; // 6 sigma boundary cut
3658 Double_t cost = 0.0;
3659 // Sigma boundary cost function
3660 if (dist> (0.5 * padlength - sigmaz)){
3661 cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
3663 cost = (cost + 1.0) * (cost + 1.0);
3669 //Int_t label = TMath::Abs(track->GetLabel());
3670 //if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
3671 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3674 if (chi2 > maxChi2[1]) {
3679 detector = c->GetDetector();
3680 // Store the clusters in the road
3681 for (Int_t ih = 2; ih < 9; ih++) {
3682 if (cl[ih][it] == 0) {
3684 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3689 if (chi2 < maxChi2[0]) {
3690 maxChi2[1] = maxChi2[0];
3692 indexes[1][it] = indexes[0][it];
3693 cl[1][it] = cl[0][it];
3694 indexes[0][it] = timeBin.GetIndex(i);
3700 indexes[1][it] = timeBin.GetIndex(i);
3704 for(int iCheckPoint = 0; iCheckPoint<4; iCheckPoint++)
3705 fHFindCl[iCheckPoint]->Fill(checkPoint[iCheckPoint]);
3707 if (checkPoint[3]) {
3708 if (track->GetPt() > 0) fHMinYPos->Fill(minY);
3709 else fHMinYNeg->Fill(minY);
3711 fHMinD->Fill(minD[0], minD[1]);
3724 xmean /= Float_t(nfound); // Middle x
3725 track2.PropagateTo(xmean); // Propagate track to the center
3728 // Choose one of the variants
3733 Double_t sumdy = 0.0;
3734 Double_t sumdy2 = 0.0;
3735 Double_t sumx = 0.0;
3736 Double_t sumxy = 0.0;
3737 Double_t sumx2 = 0.0;
3738 Double_t mpads = 0.0;
3744 Double_t moffset[10]; // Mean offset
3745 Double_t mean[10]; // Mean value
3746 Double_t angle[10]; // Angle
3748 Double_t smoffset[10]; // Sigma of mean offset
3749 Double_t smean[10]; // Sigma of mean value
3750 Double_t sangle[10]; // Sigma of angle
3751 Double_t smeanangle[10]; // Correlation
3753 Double_t sigmas[10];
3754 Double_t tchi2s[10]; // Chi2s for tracklet
3756 for (Int_t it = 0; it < 10; it++) {
3762 moffset[it] = 0.0; // Mean offset
3763 mean[it] = 0.0; // Mean value
3764 angle[it] = 0.0; // Angle
3766 smoffset[it] = 1.0e5; // Sigma of mean offset
3767 smean[it] = 1.0e5; // Sigma of mean value
3768 sangle[it] = 1.0e5; // Sigma of angle
3769 smeanangle[it] = 0.0; // Correlation
3772 tchi2s[it] = 1.0e5; // Chi2s for tracklet
3779 for (Int_t it = 0; it < t1 - t0; it++) {
3783 for (Int_t dt = -3; dt <= 3; dt++) {
3787 if (it+dt > t1-t0) {
3790 if (!cl[0][it+dt]) {
3793 zmean[it] += cl[0][it+dt]->GetZ();
3796 zmean[it] /= nmean[it];
3799 for (Int_t it = 0; it < t1 - t0; it++) {
3803 for (Int_t ih = 0; ih < 10; ih++) {
3804 dz[ih][it] = -100.0;
3805 dy[ih][it] = -100.0;
3809 Double_t xcluster = cl[ih][it]->GetX();
3812 track2.GetProlongation(xcluster,ytrack,ztrack );
3813 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
3814 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
3821 if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
3823 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
3831 // Iterative choice of "best path"
3833 Int_t label = TMath::Abs(track->GetLabel());
3836 for (Int_t iter = 0; iter < 9; iter++) {
3851 for (Int_t it = 0; it < t1 - t0; it++) {
3853 if (!cl[best[iter][it]][it]) {
3857 // Calculates pad-row changes
3858 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3859 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3860 for (Int_t itd = it - 1; itd >= 0; itd--) {
3861 if (cl[best[iter][itd]][itd]) {
3862 zbefore = cl[best[iter][itd]][itd]->GetZ();
3866 for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
3867 if (cl[best[iter][itd]][itd]) {
3868 zafter = cl[best[iter][itd]][itd]->GetZ();
3872 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
3873 (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
3877 Double_t dx = x[it]-xmean; // Distance to reference x
3878 sumz += cl[best[iter][it]][it]->GetZ();
3880 sumdy += dy[best[iter][it]][it];
3881 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3884 sumxy += dx*dy[best[iter][it]][it];
3885 mpads += cl[best[iter][it]][it]->GetNPads();
3886 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3887 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3888 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3898 // calculates line parameters
3900 Double_t det = sum*sumx2 - sumx*sumx;
3901 angle[iter] = (sum*sumxy - sumx*sumdy) / det;
3902 mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
3903 meanz[iter] = sumz / sum;
3904 moffset[iter] = sumdy / sum;
3905 mpads /= sum; // Mean number of pads
3907 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3908 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3910 for (Int_t it = 0; it < t1 - t0; it++) {
3911 if (!cl[best[iter][it]][it]) {
3914 Double_t dx = x[it] - xmean;
3915 Double_t ytr = mean[iter] + angle[iter] * dx;
3916 sigma2 += (dy[best[iter][it]][it] - ytr)
3917 * (dy[best[iter][it]][it] - ytr);
3918 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3919 * (dy[best[iter][it]][it] - moffset[iter]);
3922 sigma2 /= (sum - 2); // Normalized residuals
3923 sigma1 /= (sum - 1); // Normalized residuals
3924 smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
3925 sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
3926 smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
3927 sigmas[iter] = TMath::Sqrt(sigma1);
3928 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3931 // Iterative choice of "better path"
3933 for (Int_t it = 0; it < t1 - t0; it++) {
3935 if (!cl[best[iter][it]][it]) {
3939 // Add unisochronity + angular effect contribution
3940 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3941 Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
3942 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3943 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3944 Double_t mindist = 100000.0;
3947 for (Int_t ih = 0; ih < 10; ih++) {
3951 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3952 dist2 *= dist2; // Chi2 distance
3953 if (dist2 < mindist) {
3958 best[iter+1][it] = ihbest;
3962 // Update best hypothesy if better chi2 according tracklet position and angle
3964 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3965 Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
3966 Double_t say = track->GetSigmaSnpY(); // track->fCey;
3967 //Double_t chi20 = mean[bestiter]*mean[bestiter ] / sy2+angle[bestiter]*angle[bestiter]/sa2;
3968 //Double_t chi21 = mean[iter]*mean[iter] / sy2+angle[iter]*angle[iter]/sa2;
3970 Double_t detchi = sy2*sa2 - say*say;
3971 Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
3973 Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
3974 + angle[bestiter] * angle[bestiter] * invers[1]
3975 + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
3976 Double_t chi21 = mean[iter] * mean[iter] * invers[0]
3977 + angle[iter] * angle[iter] * invers[1]
3978 + 2.0 * mean[iter] * angle[iter] * invers[2];
3979 tchi2s[iter] = chi21;
3981 if ((changes[iter] <= changes[bestiter]) &&
3991 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
3992 Short_t maxpos = -1;
3993 Float_t maxcharge = 0.0;
3994 Short_t maxpos4 = -1;
3995 Float_t maxcharge4 = 0.0;
3996 Short_t maxpos5 = -1;
3997 Float_t maxcharge5 = 0.0;
3999 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
4000 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
4002 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
4003 ,-AliTracker::GetBz()*0.1);
4004 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
4006 expectederr += (mpads - 3.5) * 0.04;
4008 if (changes[bestiter] > 1) {
4009 expectederr += changes[bestiter] * 0.01;
4011 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
4012 //if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
4013 //expectederr+=10000;
4015 for (Int_t it = 0; it < t1 - t0; it++) {
4017 if (!cl[best[bestiter][it]][it]) {
4021 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // Set cluster error
4022 if (!cl[best[bestiter][it]][it]->IsUsed()) {
4023 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
4024 //cl[best[bestiter][it]][it]->Use();
4027 // Time bins with maximal charge
4028 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
4029 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4030 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4033 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
4034 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
4035 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4036 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4040 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
4041 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
4042 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4043 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4047 // Time bins with maximal charge
4048 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
4049 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4050 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4053 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
4054 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
4055 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4056 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4060 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
4061 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
4062 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4063 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4067 clusters[it+t0] = indexes[best[bestiter][it]][it];
4069 // Still needed ????
4070 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 &&
4071 //cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0]
4072 // = indexes[best[bestiter][it]][it]; //Test
4077 // Set tracklet parameters
4079 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
4081 trackleterr2 += (mpads - 3.5) * 0.04;
4083 trackleterr2 += changes[bestiter] * 0.01;
4084 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
4085 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
4087 // Set tracklet parameters
4089 ,track2.GetY() + moffset[bestiter]
4093 tracklet.SetTilt(h01);
4094 tracklet.SetP0(mean[bestiter]);
4095 tracklet.SetP1(angle[bestiter]);
4096 tracklet.SetN(nfound);
4097 tracklet.SetNCross(changes[bestiter]);
4098 tracklet.SetPlane(plane);
4099 tracklet.SetSigma2(expectederr);
4100 tracklet.SetChi2(tchi2s[bestiter]);
4101 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
4102 track->SetTracklets(plane,tracklet);
4103 track->SetNWrong(track->GetNWrong() + nbad[0]);
4108 TClonesArray array0("AliTRDcluster");
4109 TClonesArray array1("AliTRDcluster");
4110 array0.ExpandCreateFast(t1 - t0 + 1);
4111 array1.ExpandCreateFast(t1 - t0 + 1);
4112 TTreeSRedirector &cstream = *fDebugStreamer;
4113 AliTRDcluster dummy;
4117 for (Int_t it = 0; it < t1 - t0; it++) {
4118 dy0[it] = dy[0][it];
4119 dyb[it] = dy[best[bestiter][it]][it];
4121 new(array0[it]) AliTRDcluster(*cl[0][it]);
4124 new(array0[it]) AliTRDcluster(dummy);
4126 if(cl[best[bestiter][it]][it]) {
4127 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
4130 new(array1[it]) AliTRDcluster(dummy);
4133 TGraph graph0(t1-t0,x,dy0);
4134 TGraph graph1(t1-t0,x,dyb);
4135 TGraph graphy(t1-t0,x,yt);
4136 TGraph graphz(t1-t0,x,zt);
4138 if (AliTRDReconstructor::StreamLevel() > 0) {
4139 cstream << "tracklet"
4140 << "track.=" << track // Track parameters
4141 << "tany=" << tany // Tangent of the local track angle
4142 << "xmean=" << xmean // Xmean - reference x of tracklet
4143 << "tilt=" << h01 // Tilt angle
4144 << "nall=" << nall // Number of foundable clusters
4145 << "nfound=" << nfound // Number of found clusters
4146 << "clfound=" << clfound // Total number of found clusters in road
4147 << "mpads=" << mpads // Mean number of pads per cluster
4148 << "plane=" << plane // Plane number
4149 << "detector=" << detector // Detector number
4150 << "road=" << road // The width of the used road
4151 << "graph0.=" << &graph0 // x - y = dy for closest cluster
4152 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
4153 << "graphy.=" << &graphy // y position of the track
4154 << "graphz.=" << &graphz // z position of the track
4155 //<< "fCl.=" << &array0 // closest cluster
4156 //<< "fCl2.=" << &array1 // second closest cluster
4157 << "maxpos=" << maxpos // Maximal charge postion
4158 << "maxcharge=" << maxcharge // Maximal charge
4159 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
4160 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
4161 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
4162 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
4163 << "bestiter=" << bestiter // Best iteration number
4164 << "tracklet.=" << &tracklet // Corrspond to the best iteration
4165 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
4166 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
4167 << "sigmas0=" << sigmas[0] // Residuals sigma
4168 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
4169 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
4170 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
4171 << "ngoodb=" << ngood[bestiter] // in best iteration
4172 << "nbadb=" << nbad[bestiter] // in best iteration
4173 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
4174 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
4175 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
4176 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
4177 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
4178 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
4179 << "mean0=" << mean[0] // Mean dy in iter=0;
4180 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
4181 << "meanb=" << mean[bestiter] // Mean dy in iter=best
4182 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
4183 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
4184 << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
4185 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
4186 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
4187 << "expectederr=" << expectederr // Expected error of cluster position
4195 //_____________________________________________________________________________
4196 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
4197 , Int_t *outlist, Bool_t down)
4200 // Sort eleements according occurancy
4201 // The size of output array has is 2*n
4204 Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
4205 Int_t *sindexF = new Int_t[2*n];
4206 for (Int_t i = 0; i < n; i++) {
4210 TMath::Sort(n,inlist,sindexS,down);
4212 Int_t last = inlist[sindexS[0]];
4215 sindexF[0+n] = last;
4219 for (Int_t i = 1; i < n; i++) {
4220 val = inlist[sindexS[i]];
4222 sindexF[countPos]++;
4226 sindexF[countPos+n] = val;
4227 sindexF[countPos]++;
4235 // Sort according frequency
4236 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
4238 for (Int_t i = 0; i < countPos; i++) {
4239 outlist[2*i ] = sindexF[sindexS[i]+n];
4240 outlist[2*i+1] = sindexF[sindexS[i]];
4250 //_____________________________________________________________________________
4251 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
4257 Double_t alpha = AliTRDgeometry::GetAlpha();
4258 Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
4262 c[ 1] = 0.0; c[ 2] = 2.0;
4263 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
4264 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
4265 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4268 AliTRDcluster *cl = 0;
4270 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
4271 if (seeds[ilayer].IsOK()) {
4272 for (Int_t itime = 22; itime > 0; itime--) {
4273 if (seeds[ilayer].GetIndexes(itime) > 0) {
4274 index = seeds[ilayer].GetIndexes(itime);
4275 cl = seeds[ilayer].GetClusters(itime);
4288 AliTRDtrack *track = new AliTRDtrack(cl
4293 ,params[6]*alpha+shift);
4294 track->PropagateTo(params[0]-5.0);
4295 track->ResetCovariance(1);
4297 Int_t rc = FollowBackProlongation(*track);
4304 CookdEdxTimBin(*track);
4305 CookLabel(track,0.9);
4311 //////////////////////////////////////////////////////////////////////////////////////////
4313 void AliTRDtracker::InitLogHists() {
4315 fHBackfit = new TH1D("logTRD_backfit", "", 40, -0.5, 39.5);
4316 fHRefit = new TH1D("logTRD_refit", "", 40, -0.5, 39.5);
4317 fHClSearch = new TH1D("logTRD_clSearch", "", 60, -0.5, 59.5);
4319 fHX = new TH1D("logTRD_X", ";x (cm)", 200, 50, 400);
4320 fHNCl = new TH1D("logTRD_ncl", "", 40, -0.5, 39.5);
4321 fHNClTrack = new TH1D("logTRD_nclTrack", "", 180, -0.5, 179.5);
4323 fHMinYPos = new TH1D("logTRD_minYPos", ";#delta Y (cm)", 400, -6, 6);
4324 fHMinYNeg = new TH1D("logTRD_minYNeg", ";#delta Y (cm)", 400, -6, 6);
4325 fHMinZ = new TH1D("logTRD_minZ", ";#delta Z (cm)", 400, -20, 20);
4326 fHMinD = new TH2D("logTRD_minD", ";#delta Y (cm);#delta Z (cm)", 100, -6, 6, 100, -50, 50);
4328 fHDeltaX = new TH1D("logTRD_deltaX", ";#delta X (cm)", 100, -5, 5);
4329 fHXCl = new TH1D("logTRD_xCl", ";cluster x position (cm)", 1000, 280, 380);
4331 const char *nameFindCl[4] = {"logTRD_clY", "logTRD_clZ", "logTRD_clB", "logTRD_clG"};
4333 for(int i=0; i<4; i++) {
4334 fHFindCl[i] = new TH1D(nameFindCl[i], "", 30, -0.5, 29.5);
4338 //////////////////////////////////////////////////////////////////////////////////////////
4340 void AliTRDtracker::SaveLogHists() {
4342 TDirectory *sav = gDirectory;
4345 TSeqCollection *col = gROOT->GetListOfFiles();
4346 int N = col->GetEntries();
4347 for(int i=0; i<N; i++) {
4348 logFile = (TFile*)col->At(i);
4349 if (strstr(logFile->GetName(), "AliESDs.root")) break;
4353 fHBackfit->Write(fHBackfit->GetName(), TObject::kOverwrite);
4354 fHRefit->Write(fHRefit->GetName(), TObject::kOverwrite);
4355 fHClSearch->Write(fHClSearch->GetName(), TObject::kOverwrite);
4356 fHX->Write(fHX->GetName(), TObject::kOverwrite);
4357 fHNCl->Write(fHNCl->GetName(), TObject::kOverwrite);
4358 fHNClTrack->Write(fHNClTrack->GetName(), TObject::kOverwrite);
4360 fHMinYPos->Write(fHMinYPos->GetName(), TObject::kOverwrite);
4361 fHMinYNeg->Write(fHMinYNeg->GetName(), TObject::kOverwrite);
4362 fHMinD->Write(fHMinD->GetName(), TObject::kOverwrite);
4363 fHMinZ->Write(fHMinZ->GetName(), TObject::kOverwrite);
4365 fHDeltaX->Write(fHDeltaX->GetName(), TObject::kOverwrite);
4366 fHXCl->Write(fHXCl->GetName(), TObject::kOverwrite);
4369 for(int i=0; i<4; i++)
4370 fHFindCl[i]->Write(fHFindCl[i]->GetName(), TObject::kOverwrite);
4377 //////////////////////////////////////////////////////////////////////////////////////////