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 "AliESDtrack.h"
44 #include "AliAlignObj.h"
45 #include "AliRieman.h"
46 #include "AliTrackPointArray.h"
48 #include "AliTRDgeometry.h"
49 #include "AliTRDpadPlane.h"
50 #include "AliTRDgeometry.h"
51 #include "AliTRDcluster.h"
52 #include "AliTRDtrack.h"
53 #include "AliTRDseed.h"
54 #include "AliTRDcalibDB.h"
55 #include "AliTRDCommonParam.h"
56 #include "AliTRDtracker.h"
57 #include "AliTRDReconstructor.h"
58 #include "AliTRDCalibraFillHisto.h"
60 ClassImp(AliTRDtracker)
62 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5; //
63 const Float_t AliTRDtracker::fgkLabelFraction = 0.8; //
64 const Double_t AliTRDtracker::fgkMaxChi2 = 12.0; //
65 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Corresponds to tan = 3
66 const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
68 //_____________________________________________________________________________
69 AliTRDtracker::AliTRDtracker()
96 // Default constructor
99 for (Int_t i = 0; i < kTrackingSectors; i++) {
102 for (Int_t j = 0; j < 5; j++) {
103 for (Int_t k = 0; k < 18; k++) {
104 fHoles[j][k] = kFALSE;
112 //_____________________________________________________________________________
113 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
134 ,fTimeBinsPerPlane(0)
135 ,fAddTRDseeds(kFALSE)
145 //_____________________________________________________________________________
146 AliTRDtracker::AliTRDtracker(const TFile */*geomfile*/)
162 ,fClusters(new TObjArray(2000))
164 ,fSeeds(new TObjArray(2000))
166 ,fTracks(new TObjArray(1000))
167 ,fTimeBinsPerPlane(0)
168 ,fAddTRDseeds(kFALSE)
176 TDirectory *savedir = gDirectory;
178 fGeom = new AliTRDgeometry();
179 fGeom->ReadGeoMatrices();
181 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
183 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
184 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
186 fHoles[icham][trS] = fGeom->IsHole(0,icham,geomS);
190 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(0,0);
191 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
192 if (tiltAngle < 0.1) {
196 if (!AliTRDcalibDB::Instance()) {
197 AliFatal("Could not get calibration object");
199 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
201 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
209 //_____________________________________________________________________________
210 AliTRDtracker::~AliTRDtracker()
213 // Destructor of AliTRDtracker
235 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
236 delete fTrSec[geomS];
239 if (fDebugStreamer) {
240 delete fDebugStreamer;
245 //_____________________________________________________________________________
246 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
249 // Transform internal TRD ID to global detector ID
252 Int_t isector = fGeom->GetSector(lid);
253 Int_t ichamber = fGeom->GetChamber(lid);
254 Int_t iplan = fGeom->GetPlane(lid);
256 AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
259 iLayer = AliGeomManager::kTRD1;
262 iLayer = AliGeomManager::kTRD2;
265 iLayer = AliGeomManager::kTRD3;
268 iLayer = AliGeomManager::kTRD4;
271 iLayer = AliGeomManager::kTRD5;
274 iLayer = AliGeomManager::kTRD6;
278 Int_t modId = isector * fGeom->Ncham() + ichamber;
279 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
285 //_____________________________________________________________________________
286 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
289 // Transform global detector ID to local detector ID
293 AliGeomManager::ELayerID layerId = AliGeomManager::VolUIDToLayer(gid,modId);
295 Int_t isector = modId / fGeom->Ncham();
296 Int_t ichamber = modId % fGeom->Ncham();
300 case AliGeomManager::kTRD1:
303 case AliGeomManager::kTRD2:
306 case AliGeomManager::kTRD3:
309 case AliGeomManager::kTRD4:
312 case AliGeomManager::kTRD5:
315 case AliGeomManager::kTRD6:
326 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
332 //_____________________________________________________________________________
333 Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
336 // Transform from cluster system to tracking system
339 // Magic constants for geo manager transformation
340 const Double_t kX0shift = 2.52;
343 // Apply alignment and calibration to transform cluster
345 Int_t detector = cluster->GetDetector();
346 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
347 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
348 Int_t sector = fGeom->GetSector(cluster->GetDetector());
350 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
351 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.0); // Drift distance
356 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
357 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
359 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(plane,chamber);
360 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
361 Double_t localPos[3];
362 Double_t localPosTracker[3];
363 localPos[0] = -cluster->GetX();
364 localPos[1] = cluster->GetY() - driftX * exB;
365 localPos[2] = cluster->GetZ() - zshiftIdeal;
367 cluster->SetY(cluster->GetY() - driftX*exB);
368 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
369 cluster->SetX(xplane - cluster->GetX());
371 TGeoHMatrix *matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
373 // No matrix found - if somebody used geometry with holes
374 AliError("Invalid Geometry - Default Geometry used\n");
377 matrix->LocalToMaster(localPos,localPosTracker);
379 if (AliTRDReconstructor::StreamLevel() > 1) {
380 (* fDebugStreamer) << "Transform"
382 << "matrix.=" << matrix
383 << "Detector=" << detector
384 << "Sector=" << sector
386 << "Chamber=" << chamber
387 << "lx0=" << localPosTracker[0]
388 << "ly0=" << localPosTracker[1]
389 << "lz0=" << localPosTracker[2]
393 cluster->SetX(localPosTracker[0]+kX0shift);
394 cluster->SetY(localPosTracker[1]);
395 cluster->SetZ(localPosTracker[2]);
401 //_____________________________________________________________________________
402 // Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
405 // // Is this still needed ????
407 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
408 // const Double_t kTime0Cor = 0.32; // time0 correction
410 // const Double_t kX0shift = 2.52;
411 // const Double_t kX0shift5 = 3.05;
414 // // apply alignment and calibration to transform cluster
417 // Int_t detector = cluster->GetDetector();
418 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
419 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
420 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
422 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
423 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
427 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
428 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
431 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
432 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
433 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
434 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
435 // localPos[2] = -cluster->GetX();
436 // localPos[0] = cluster->GetY() - driftX*exB;
437 // localPos[1] = cluster->GetZ() -zshiftIdeal;
438 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
439 // matrix->LocalToMaster(localPos, globalPos);
441 // Double_t sectorAngle = 20.*(sector%18)+10;
442 // TGeoHMatrix rotSector;
443 // rotSector.RotateZ(sectorAngle);
444 // rotSector.LocalToMaster(globalPos, localPosTracker);
447 // TGeoHMatrix matrix2(*matrix);
448 // matrix2.MultiplyLeft(&rotSector);
449 // matrix2.LocalToMaster(localPos,localPosTracker2);
453 // cluster->SetY(cluster->GetY() - driftX*exB);
454 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
455 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
456 // (*fDebugStreamer)<<"Transform"<<
458 // "matrix.="<<matrix<<
459 // "matrix2.="<<&matrix2<<
460 // "Detector="<<detector<<
461 // "Sector="<<sector<<
463 // "Chamber="<<chamber<<
464 // "lx0="<<localPosTracker[0]<<
465 // "ly0="<<localPosTracker[1]<<
466 // "lz0="<<localPosTracker[2]<<
467 // "lx2="<<localPosTracker2[0]<<
468 // "ly2="<<localPosTracker2[1]<<
469 // "lz2="<<localPosTracker2[2]<<
473 // cluster->SetX(localPosTracker[0]+kX0shift5);
475 // cluster->SetX(localPosTracker[0]+kX0shift);
477 // cluster->SetY(localPosTracker[1]);
478 // cluster->SetZ(localPosTracker[2]);
482 //_____________________________________________________________________________
483 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
486 // Rotates the track when necessary
489 Double_t alpha = AliTRDgeometry::GetAlpha();
490 Double_t y = track->GetY();
491 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
493 // Is this still needed ????
494 //Int_t ns = AliTRDgeometry::kNsect;
495 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
499 if (!track->Rotate( alpha)) {
503 else if (y < -ymax) {
505 if (!track->Rotate(-alpha)) {
514 //_____________________________________________________________________________
515 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
516 , Int_t timebin, UInt_t &index)
519 // Try to find cluster in the backup list
522 AliTRDcluster *cl =0;
523 Int_t *indexes = track->GetBackupIndexes();
525 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
526 if (indexes[i] == 0) {
529 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
533 if (cli->GetLocalTimeBin() != timebin) {
536 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
537 if (iplane == plane) {
548 //_____________________________________________________________________________
549 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
552 // Return last updated plane
556 Int_t *indexes = track->GetBackupIndexes();
558 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
559 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
563 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
564 if (iplane > lastplane) {
573 //_____________________________________________________________________________
574 Int_t AliTRDtracker::Clusters2Tracks(AliESDEvent *event)
577 // Finds tracks within the TRD. The ESD event is expected to contain seeds
578 // at the outer part of the TRD. The seeds
579 // are found within the TRD if fAddTRDseeds is TRUE.
580 // The tracks are propagated to the innermost time bin
581 // of the TRD and the ESD event is updated
584 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
585 Float_t foundMin = fgkMinClustersInTrack * timeBins;
588 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
590 Int_t n = event->GetNumberOfTracks();
591 for (Int_t i = 0; i < n; i++) {
593 AliESDtrack *seed = event->GetTrack(i);
594 ULong_t status = seed->GetStatus();
595 if ((status & AliESDtrack::kTRDout) == 0) {
598 if ((status & AliESDtrack::kTRDin) != 0) {
603 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
604 //seed2->ResetCovariance();
605 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
606 AliTRDtrack &t = *pt;
607 FollowProlongation(t);
608 if (t.GetNumberOfClusters() >= foundMin) {
610 CookLabel(pt,1 - fgkLabelFraction);
615 Double_t xTPC = 250.0;
616 if (PropagateToX(t,xTPC,fgkMaxStep)) {
617 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
624 AliInfo(Form("Number of loaded seeds: %d",nseed));
625 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
626 AliInfo(Form("Total number of found tracks: %d",found));
632 //_____________________________________________________________________________
633 Int_t AliTRDtracker::PropagateBack(AliESDEvent *event)
636 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
637 // backpropagated by the TPC tracker. Each seed is first propagated
638 // to the TRD, and then its prolongation is searched in the TRD.
639 // If sufficiently long continuation of the track is found in the TRD
640 // the track is updated, otherwise it's stored as originaly defined
641 // by the TPC tracker.
644 Int_t found = 0; // number of tracks found
645 Float_t foundMin = 20.0;
646 Int_t n = event->GetNumberOfTracks();
649 Float_t *quality = new Float_t[n];
650 Int_t *index = new Int_t[n];
651 for (Int_t i = 0; i < n; i++) {
652 AliESDtrack *seed = event->GetTrack(i);
653 Double_t covariance[15];
654 seed->GetExternalCovariance(covariance);
655 quality[i] = covariance[0]+covariance[2];
656 //quality[i] = covariance[0];
658 TMath::Sort(n,quality,index,kFALSE);
660 for (Int_t i = 0; i < n; i++) {
662 //AliESDtrack *seed = event->GetTrack(i);
663 AliESDtrack *seed = event->GetTrack(index[i]);
666 ULong_t status = seed->GetStatus();
667 if ((status & AliESDtrack::kTPCout) == 0) {
672 if ((status & AliESDtrack::kTRDout) != 0) {
677 Int_t lbl = seed->GetLabel();
678 AliTRDtrack *track = new AliTRDtrack(*seed);
679 track->SetSeedLabel(lbl);
680 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
682 Float_t p4 = track->GetC();
683 Int_t expectedClr = FollowBackProlongation(*track);
686 fHX->Fill(track->GetX());
689 // store the last measurement
691 fHNClTrack->Fill(track->GetNumberOfClusters());
692 if (track->GetNumberOfClusters() >= foundMin) {
696 CookdEdxTimBin(*track);
697 CookLabel(track,1 - fgkLabelFraction);
698 if (track->GetBackupTrack()) {
699 //fHBackfit->Fill(5);
700 UseClusters(track->GetBackupTrack());
701 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
707 // inter-tracks competition ???
708 if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
709 (TMath::Abs(track->GetPt()) > 0.8)) {
714 // Make backup for back propagation
717 Int_t foundClr = track->GetNumberOfClusters();
718 if (foundClr >= foundMin) {
720 track->CookdEdxTimBin(); // A.Bercuci 25.07.07
721 CookLabel(track,1 - fgkLabelFraction);
722 if (track->GetBackupTrack()) {
723 UseClusters(track->GetBackupTrack());
726 // Sign only gold tracks
727 if (track->GetChi2() / track->GetNumberOfClusters() < 4) {
728 if ((seed->GetKinkIndex(0) == 0) &&
729 (TMath::Abs(track->GetPt()) < 1.5)) {
733 Bool_t isGold = kFALSE;
736 if (track->GetChi2() / track->GetNumberOfClusters() < 5) {
737 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
738 if (track->GetBackupTrack()) {
739 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
748 (track->GetNCross() == 0) &&
749 (track->GetChi2() / track->GetNumberOfClusters() < 7)) {
750 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
751 if (track->GetBackupTrack()) {
752 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
758 (track->GetBackupTrack())) {
759 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
760 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
761 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
766 if ((track->StatusForTOF() > 0) &&
767 (track->GetNCross() == 0) &&
768 (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) {
769 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
777 // Debug part of tracking
778 TTreeSRedirector &cstream = *fDebugStreamer;
779 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.
780 if (AliTRDReconstructor::StreamLevel() > 0) {
781 if (track->GetBackupTrack()) {
783 << "EventNrInFile=" << eventNrInFile
786 << "trdback.=" << track->GetBackupTrack()
791 << "EventNrInFile=" << eventNrInFile
794 << "trdback.=" << track
800 // Propagation to the TOF (I.Belikov)
801 if (track->GetStop() == kFALSE) {
804 Double_t xtof = 371.0;
805 Double_t xTOF0 = 370.0;
807 Double_t c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
808 if (TMath::Abs(c2) >= 0.99) {
815 PropagateToX(*track,xTOF0,fgkMaxStep);
817 // Energy losses taken to the account - check one more time
818 c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
819 if (TMath::Abs(c2) >= 0.99) {
826 //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) {
827 // fHBackfit->Fill(7);
832 Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
834 track->GetYAt(xtof,GetBz(),y);
836 if (!track->Rotate( AliTRDgeometry::GetAlpha())) {
842 else if (y < -ymax) {
843 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
850 if (track->PropagateTo(xtof)) {
851 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
854 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
855 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
856 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
858 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
860 //seed->SetTRDtrack(new AliTRDtrack(*track));
861 if (track->GetNumberOfClusters() > foundMin) {
872 if ((track->GetNumberOfClusters() > 15) &&
873 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
875 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
878 //seed->SetStatus(AliESDtrack::kTRDStop);
879 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
880 for (Int_t j = 0; j <AliESDtrack::kNSlice; j++) {
881 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
883 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
885 //seed->SetTRDtrack(new AliTRDtrack(*track));
891 seed->SetTRDQuality(track->StatusForTOF());
892 seed->SetTRDBudget(track->GetBudget(0));
898 AliInfo(Form("Number of seeds: %d",fNseeds));
899 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
902 if (AliTRDReconstructor::SeedingOn()) {
903 MakeSeedsMI(3,5,event);
917 //_____________________________________________________________________________
918 Int_t AliTRDtracker::RefitInward(AliESDEvent *event)
921 // Refits tracks within the TRD. The ESD event is expected to contain seeds
922 // at the outer part of the TRD.
923 // The tracks are propagated to the innermost time bin
924 // of the TRD and the ESD event is updated
925 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
928 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
929 Float_t foundMin = fgkMinClustersInTrack * timeBins;
932 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
935 Int_t n = event->GetNumberOfTracks();
936 for (Int_t i = 0; i < n; i++) {
938 AliESDtrack *seed = event->GetTrack(i);
939 new (&seed2) AliTRDtrack(*seed);
942 if (seed2.GetX() < 270.0) {
943 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
948 ULong_t status = seed->GetStatus();
949 if ((status & AliESDtrack::kTRDout) == 0) {
953 if ((status & AliESDtrack::kTRDin) != 0) {
961 seed2.ResetCovariance(50.0);
963 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
964 Int_t *indexes2 = seed2.GetIndexes();
965 for (Int_t i = 0; i < AliESDtrack::kNPlane;i++) {
966 for (Int_t j = 0; j < AliESDtrack::kNSlice;j++) {
967 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
969 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
972 Int_t *indexes3 = pt->GetBackupIndexes();
973 for (Int_t i = 0; i < 200;i++) {
974 if (indexes2[i] == 0) {
977 indexes3[i] = indexes2[i];
980 //AliTRDtrack *pt = seed2;
981 // A.Bercuci 25.07.07
982 //AliTRDtrack &t = *pt;
983 FollowProlongation(*pt);
984 if (pt->GetNumberOfClusters() >= foundMin) {
986 //CookLabel(pt, 1-fgkLabelFraction);
988 pt->CookdEdxTimBin();
990 //pt->Calibrate(); // slot for calibration
994 Double_t xTPC = 250.0;
995 if (PropagateToX(*pt,xTPC,fgkMaxStep)) {
997 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
1000 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1001 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1002 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
1004 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
1008 // If not prolongation to TPC - propagate without update
1010 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
1011 seed2->ResetCovariance(5.0);
1012 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1014 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
1016 pt2->CookdEdxTimBin(); // A.Bercuci 25.07.07
1017 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
1020 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1021 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1022 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
1024 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
1027 // A.Bercuci 25.07.07
1028 // Add TRD track to ESDfriendTrack - maybe this tracks are not useful for post-processing - TODO make decission
1029 if (AliTRDReconstructor::StreamLevel()>0) seed->AddCalibObject(new AliTRDtrack(*pt2/*, kTRUE*/));
1034 // A.Bercuci 25.07.07
1035 // Add TRD track to ESDfriendTrack
1036 if (AliTRDReconstructor::StreamLevel()>0) seed->AddCalibObject(new AliTRDtrack(*pt/*, kTRUE*/));
1040 AliInfo(Form("Number of loaded seeds: %d",nseed));
1041 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
1047 //_____________________________________________________________________________
1048 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
1051 // Starting from current position on track=t this function tries
1052 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1053 // if a close cluster is found. Returns the number of clusters
1054 // expected to be found in sensitive layers
1055 // GeoManager used to estimate mean density
1059 Int_t lastplane = GetLastPlane(&t);
1060 Double_t radLength = 0.0;
1062 Int_t expectedNumberOfClusters = 0;
1064 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
1066 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1067 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1070 // Propagate track close to the plane if neccessary
1072 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
1073 if (currentx < (-fgkMaxStep + t.GetX())) {
1074 // Propagate closer to chamber - safety space fgkMaxStep
1075 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
1080 if (!AdjustSector(&t)) {
1085 // Get material budget
1094 // Starting global position
1096 // End global position
1097 x = fTrSec[0]->GetLayer(row0)->GetX();
1098 if (!t.GetProlongation(x,y,z)) {
1101 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1102 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1104 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1106 radLength = param[1]; // Get mean propagation parameters
1107 // A.Bercuci 25.07.07
1108 // Flags for marking the track momentum and direction. The track is
1109 // marked only if it has at least 1 cluster picked up in the current
1111 Bool_t kUPDATED = kFALSE, kMARKED = kFALSE;
1114 // Propagate and update
1116 sector = t.GetSector();
1117 //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
1118 for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
1119 // A.Bercuci 25.07.07
1120 // Mark track kinematics
1121 if(itime > 10 && kUPDATED && !kMARKED){
1122 t.SetTrackSegmentDirMom(iplane);
1126 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
1127 expectedNumberOfClusters++;
1128 t.SetNExpected(t.GetNExpected() + 1);
1129 if (t.GetX() > 345.0) {
1130 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1132 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1133 AliTRDcluster *cl = 0;
1135 Double_t maxChi2 = fgkMaxChi2;
1140 AliTRDcluster *cl0 = timeBin[0];
1142 // No clusters in given time bin
1146 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1147 if (plane > lastplane) {
1151 Int_t timebin = cl0->GetLocalTimeBin();
1152 AliTRDcluster *cl2 = GetCluster(&t,plane,timebin,index);
1156 //Double_t h01 = GetTiltFactor(cl); //I.B's fix
1157 //maxChi2=t.GetPredictedChi2(cl,h01);
1160 //if (cl->GetNPads()<5)
1161 Double_t dxsample = timeBin.GetdX();
1162 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1163 Double_t h01 = GetTiltFactor(cl);
1164 Int_t det = cl->GetDetector();
1165 Int_t plane = fGeom->GetPlane(det);
1166 if (t.GetX() > 345.0) {
1167 t.SetNLast(t.GetNLast() + 1);
1168 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1171 Double_t xcluster = cl->GetX();
1172 t.PropagateTo(xcluster,radLength,rho);
1174 if (!AdjustSector(&t)) {
1177 maxChi2 = t.GetPredictedChi2(cl,h01);
1180 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1183 // A.Bercuci 25.07.07
1184 //SetCluster(cl, GetNumberOfClusters()-1);
1192 return expectedNumberOfClusters;
1195 //_____________________________________________________________________________
1196 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
1199 // Starting from current radial position of track <t> this function
1200 // extrapolates the track up to outer timebin and in the sensitive
1201 // layers confirms prolongation if a close cluster is found.
1202 // Returns the number of clusters expected to be found in sensitive layers
1203 // Use GEO manager for material Description
1205 // return number of assigned clusters ?
1210 Int_t clusters[1000];
1211 Double_t radLength = 0.0;
1213 Int_t expectedNumberOfClusters = 0;
1214 Float_t ratio0 = 0.0;
1215 AliTRDtracklet tracklet;
1217 // Calibration fill 2D
1218 AliTRDCalibraFillHisto *calibra = AliTRDCalibraFillHisto::Instance();
1220 AliInfo("Could not get Calibra instance\n");
1222 if (calibra->GetMITracking()) {
1223 calibra->ResetTrack();
1226 for (Int_t i = 0; i < 1000; i++) {
1230 for (Int_t iplane = 0; iplane < AliESDtrack::kNPlane; iplane++) {
1232 int hb = iplane * 10;
1233 fHClSearch->Fill(hb);
1235 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1236 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1237 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1238 if (currentx < t.GetX()) {
1239 fHClSearch->Fill(hb+1);
1244 // Propagate closer to chamber if neccessary
1246 if (currentx > (fgkMaxStep + t.GetX())) {
1247 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
1248 fHClSearch->Fill(hb+2);
1252 if (!AdjustSector(&t)) {
1253 fHClSearch->Fill(hb+3);
1256 if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
1257 fHClSearch->Fill(hb+4);
1262 // Get material budget inside of chamber
1270 // Starting global position
1272 // End global position
1273 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1274 if (!t.GetProlongation(x,y,z)) {
1275 fHClSearch->Fill(hb+5);
1278 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1279 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1281 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1283 radLength = param[1]; // Get mean propagation parameters
1288 sector = t.GetSector();
1289 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1290 fHNCl->Fill(tracklet.GetN());
1292 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
1293 fHClSearch->Fill(hb+6);
1298 // Propagate and update track
1300 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1302 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1303 expectedNumberOfClusters++;
1304 t.SetNExpected(t.GetNExpected() + 1);
1305 if (t.GetX() > 345.0) {
1306 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1308 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1309 AliTRDcluster *cl = 0;
1311 Double_t maxChi2 = fgkMaxChi2;
1316 if (clusters[ilayer] > 0) {
1317 index = clusters[ilayer];
1318 cl = (AliTRDcluster *)GetCluster(index);
1319 //Double_t h01 = GetTiltFactor(cl); // I.B's fix
1320 //maxChi2=t.GetPredictedChi2(cl,h01); //
1325 //if (cl->GetNPads() < 5)
1326 Double_t dxsample = timeBin.GetdX();
1327 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1328 Double_t h01 = GetTiltFactor(cl);
1329 Int_t det = cl->GetDetector();
1330 Int_t plane = fGeom->GetPlane(det);
1331 if (t.GetX() > 345.0) {
1332 t.SetNLast(t.GetNLast() + 1);
1333 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1335 Double_t xcluster = cl->GetX();
1336 t.PropagateTo(xcluster,radLength,rho);
1337 maxChi2 = t.GetPredictedChi2(cl,h01);
1340 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1341 if (!t.Update(cl,maxChi2,index,h01)) {
1344 } // else SetCluster(cl, GetNumberOfClusters()-1); // A.Bercuci 25.07.07
1347 if (calibra->GetMITracking()) {
1348 calibra->UpdateHistograms(cl,&t);
1351 // Reset material budget if 2 consecutive gold
1353 if ((t.GetTracklets(plane).GetN() + t.GetTracklets(plane-1).GetN()) > 20) {
1364 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1365 Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
1366 if ((tracklet.GetChi2() < 18.0) &&
1369 (ratio0+ratio1 > 1.5) &&
1370 (t.GetNCross() == 0) &&
1371 (TMath::Abs(t.GetSnp()) < 0.85) &&
1372 (t.GetNumberOfClusters() > 20)){
1373 //if (ratio0 > 0.8) {
1374 t.MakeBackupTrack(); // Make backup of the track until is gold
1379 return expectedNumberOfClusters;
1382 //_____________________________________________________________________________
1383 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1386 // Starting from current radial position of track <t> this function
1387 // extrapolates the track up to radial position <xToGo>.
1388 // Returns 1 if track reaches the plane, and 0 otherwise
1391 const Double_t kEpsilon = 0.00001;
1392 //Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1393 Double_t xpos = t.GetX();
1394 Double_t dir = (xpos<xToGo) ? 1.0 : -1.0;
1396 while (((xToGo-xpos)*dir) > kEpsilon) {
1398 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1406 // Starting global position
1410 if (!t.GetProlongation(x,y,z)) {
1411 return 0; // No prolongation
1414 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1415 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1418 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1419 if (!t.PropagateTo(x,param[1],param[0])) {
1431 //_____________________________________________________________________________
1432 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1435 // Fills clusters into TRD tracking_sectors
1436 // Note that the numbering scheme for the TRD tracking_sectors
1437 // differs from that of TRD sectors
1440 if (ReadClusters(fClusters,cTree)) {
1441 AliError("Problem with reading the clusters !");
1444 Int_t ncl = fClusters->GetEntriesFast();
1446 AliInfo(Form("Sorting %d clusters",ncl));
1449 for (Int_t ichamber = 0; ichamber < 5; ichamber++) {
1450 for (Int_t isector = 0; isector < 18; isector++) {
1451 fHoles[ichamber][isector] = kTRUE;
1457 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1458 Int_t detector = c->GetDetector();
1459 Int_t localTimeBin = c->GetLocalTimeBin();
1460 Int_t sector = fGeom->GetSector(detector);
1461 Int_t plane = fGeom->GetPlane(detector);
1462 Int_t trackingSector = sector;
1464 //if (c->GetLabel(0) > 0) {
1465 if (c->GetQ() > 10) {
1466 Int_t chamber = fGeom->GetChamber(detector);
1467 fHoles[chamber][trackingSector] = kFALSE;
1470 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1474 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1478 // Apply pos correction
1480 fHXCl->Fill(c->GetX());
1482 fTrSec[trackingSector]->GetLayer(layer)->SetX(c->GetX());
1483 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1490 //_____________________________________________________________________________
1491 void AliTRDtracker::UnloadClusters()
1494 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1500 nentr = fClusters->GetEntriesFast();
1501 for (i = 0; i < nentr; i++) {
1502 delete fClusters->RemoveAt(i);
1506 nentr = fSeeds->GetEntriesFast();
1507 for (i = 0; i < nentr; i++) {
1508 delete fSeeds->RemoveAt(i);
1511 nentr = fTracks->GetEntriesFast();
1512 for (i = 0; i < nentr; i++) {
1513 delete fTracks->RemoveAt(i);
1516 Int_t nsec = AliTRDgeometry::kNsect;
1517 for (i = 0; i < nsec; i++) {
1518 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1519 fTrSec[i]->GetLayer(pl)->Clear();
1525 //_____________________________________________________________________________
1526 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESDEvent *esd)
1529 // Creates seeds using clusters between position inner plane and outer plane
1532 const Double_t kMaxTheta = 1.0;
1533 const Double_t kMaxPhi = 2.0;
1535 const Double_t kRoad0y = 6.0; // Road for middle cluster
1536 const Double_t kRoad0z = 8.5; // Road for middle cluster
1538 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1539 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1541 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1542 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1543 const Int_t kMaxSeed = 3000;
1545 Int_t maxSec = AliTRDgeometry::kNsect;
1547 // Linear fitters in planes
1548 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1549 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1550 fitterTC.StoreData(kTRUE);
1551 fitterT2.StoreData(kTRUE);
1552 AliRieman rieman(1000); // Rieman fitter
1553 AliRieman rieman2(1000); // Rieman fitter
1555 // Find the maximal and minimal layer for the planes
1557 AliTRDpropagationLayer *reflayers[6];
1558 for (Int_t i = 0; i < 6; i++) {
1559 layers[i][0] = 10000;
1562 for (Int_t ns = 0; ns < maxSec; ns++) {
1563 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1564 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(ilayer));
1568 Int_t det = layer[0]->GetDetector();
1569 Int_t plane = fGeom->GetPlane(det);
1570 if (ilayer < layers[plane][0]) {
1571 layers[plane][0] = ilayer;
1573 if (ilayer > layers[plane][1]) {
1574 layers[plane][1] = ilayer;
1579 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(0,0);
1580 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1581 Double_t hL[6]; // Tilting angle
1582 Double_t xcl[6]; // X - position of reference cluster
1583 Double_t ycl[6]; // Y - position of reference cluster
1584 Double_t zcl[6]; // Z - position of reference cluster
1586 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1587 Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
1589 Double_t chi2R = 0.0;
1590 Double_t chi2Z = 0.0;
1591 Double_t chi2RF = 0.0;
1592 Double_t chi2ZF = 0.0;
1594 Int_t nclusters; // Total number of clusters
1595 for (Int_t i = 0; i < 6; i++) {
1603 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1604 AliTRDseed *seed[kMaxSeed];
1605 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1606 seed[iseed]= &pseed[iseed*6];
1608 AliTRDseed *cseed = seed[0];
1610 Double_t seedquality[kMaxSeed];
1611 Double_t seedquality2[kMaxSeed];
1612 Double_t seedparams[kMaxSeed][7];
1613 Int_t seedlayer[kMaxSeed];
1614 Int_t registered = 0;
1615 Int_t sort[kMaxSeed];
1620 for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
1621 //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
1623 registered = 0; // Reset registerd seed counter
1624 cseed = seed[registered];
1627 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1628 //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
1631 Int_t dseed = 5 + Int_t(iter) * 3;
1633 // Initialize seeding layers
1634 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1635 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1636 xcl[ilayer] = reflayers[ilayer]->GetX();
1639 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1640 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1641 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1642 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1643 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1645 Int_t maxn3 = layer3;
1646 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1648 AliTRDcluster *cl3 = layer3[icl3];
1652 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
1653 ycl[sLayer+3] = cl3->GetY();
1654 zcl[sLayer+3] = cl3->GetZ();
1655 Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1656 Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1657 Int_t maxn0 = layer0;
1659 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1661 AliTRDcluster *cl0 = layer0[icl0];
1665 if (cl3->IsUsed() && cl0->IsUsed()) {
1668 ycl[sLayer+0] = cl0->GetY();
1669 zcl[sLayer+0] = cl0->GetZ();
1670 if (ycl[sLayer+0] > yymax0) {
1673 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1674 if (TMath::Abs(tanphi) > kMaxPhi) {
1677 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1678 if (TMath::Abs(tantheta) > kMaxTheta) {
1681 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
1683 // Expected position in 1 layer
1684 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
1685 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
1686 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1687 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1688 Int_t maxn1 = layer1;
1690 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1692 AliTRDcluster *cl1 = layer1[icl1];
1697 if (cl3->IsUsed()) nusedCl++;
1698 if (cl0->IsUsed()) nusedCl++;
1699 if (cl1->IsUsed()) nusedCl++;
1703 ycl[sLayer+1] = cl1->GetY();
1704 zcl[sLayer+1] = cl1->GetZ();
1705 if (ycl[sLayer+1] > yymax1) {
1708 if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
1711 if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
1714 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
1716 Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
1717 Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
1718 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1722 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1723 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
1724 ycl[sLayer+2] = cl2->GetY();
1725 zcl[sLayer+2] = cl2->GetZ();
1726 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
1731 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1732 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1733 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1734 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1738 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1739 cseed[iLayer].Reset();
1744 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1745 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1746 chi2Z += (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer])
1747 * (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer]);
1748 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1749 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1750 chi2R += (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer])
1751 * (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer]);
1752 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1754 if (TMath::Sqrt(chi2R) > 1.0/iter) {
1757 if (TMath::Sqrt(chi2Z) > 7.0/iter) {
1761 Float_t minmax[2] = { -100.0, 100.0 };
1762 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1763 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
1764 + 1.0 - cseed[sLayer+iLayer].GetZref(0);
1765 if (max < minmax[1]) {
1768 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
1769 - 1.0 - cseed[sLayer+iLayer].GetZref(0);
1770 if (min > minmax[0]) {
1775 Bool_t isFake = kFALSE;
1776 if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
1779 if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
1782 if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
1786 if (AliTRDReconstructor::StreamLevel() > 0) {
1787 if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
1788 TTreeSRedirector &cstream = *fDebugStreamer;
1790 << "isFake=" << isFake
1796 << "X0=" << xcl[sLayer+0]
1797 << "X1=" << xcl[sLayer+1]
1798 << "X2=" << xcl[sLayer+2]
1799 << "X3=" << xcl[sLayer+3]
1800 << "Y2exp=" << y2exp
1801 << "Z2exp=" << z2exp
1802 << "Chi2R=" << chi2R
1803 << "Chi2Z=" << chi2Z
1804 << "Seed0.=" << &cseed[sLayer+0]
1805 << "Seed1.=" << &cseed[sLayer+1]
1806 << "Seed2.=" << &cseed[sLayer+2]
1807 << "Seed3.=" << &cseed[sLayer+3]
1808 << "Zmin=" << minmax[0]
1809 << "Zmax=" << minmax[1]
1814 ////////////////////////////////////////////////////////////////////////////////////
1818 ////////////////////////////////////////////////////////////////////////////////////
1824 Bool_t isOK = kTRUE;
1826 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1828 cseed[sLayer+jLayer].SetTilt(hL[sLayer+jLayer]);
1829 cseed[sLayer+jLayer].SetPadLength(padlength[sLayer+jLayer]);
1830 cseed[sLayer+jLayer].SetX0(xcl[sLayer+jLayer]);
1832 for (Int_t iter = 0; iter < 2; iter++) {
1835 // In iteration 0 we try only one pad-row
1836 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1838 AliTRDseed tseed = cseed[sLayer+jLayer];
1839 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1841 roadz = padlength[sLayer+jLayer];
1844 Float_t quality = 10000.0;
1846 for (Int_t iTime = 2; iTime < 20; iTime++) {
1848 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1849 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1850 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1853 // Try 2 pad-rows in second iteration
1854 zexp = tseed.GetZref(0) + tseed.GetZref(1) * dxlayer;
1855 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1856 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
1858 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1859 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
1863 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1864 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1868 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1870 tseed.SetIndexes(iTime,index);
1871 tseed.SetClusters(iTime,cl); // Register cluster
1872 tseed.SetX(iTime,dxlayer); // Register cluster
1873 tseed.SetY(iTime,cl->GetY()); // Register cluster
1874 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1880 // Count the number of clusters and distortions into quality
1881 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1882 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1883 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1884 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1885 if ((iter == 0) && tseed.IsOK()) {
1886 cseed[sLayer+jLayer] = tseed;
1892 if (tseed.IsOK() && (tquality < quality)) {
1893 cseed[sLayer+jLayer] = tseed;
1898 if (!cseed[sLayer+jLayer].IsOK()) {
1903 cseed[sLayer+jLayer].CookLabels();
1904 cseed[sLayer+jLayer].UpdateUsed();
1905 nusedCl += cseed[sLayer+jLayer].GetNUsed();
1917 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1918 if (cseed[sLayer+iLayer].IsOK()) {
1919 nclusters += cseed[sLayer+iLayer].GetN2();
1925 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1926 rieman.AddPoint(xcl[sLayer+iLayer]
1927 ,cseed[sLayer+iLayer].GetYfitR(0)
1928 ,cseed[sLayer+iLayer].GetZProb()
1937 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1938 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1939 chi2R += (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0))
1940 * (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0));
1941 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1942 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1943 chi2Z += (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz())
1944 * (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz());
1945 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1947 Double_t curv = rieman.GetC();
1952 Double_t sumda = TMath::Abs(cseed[sLayer+0].GetYfitR(1) - cseed[sLayer+0].GetYref(1))
1953 + TMath::Abs(cseed[sLayer+1].GetYfitR(1) - cseed[sLayer+1].GetYref(1))
1954 + TMath::Abs(cseed[sLayer+2].GetYfitR(1) - cseed[sLayer+2].GetYref(1))
1955 + TMath::Abs(cseed[sLayer+3].GetYfitR(1) - cseed[sLayer+3].GetYref(1));
1956 Double_t likea = TMath::Exp(-sumda*10.6);
1957 Double_t likechi2 = 0.0000000001;
1959 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1961 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1962 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1963 Double_t like = likea * likechi2 * likechi2z * likeN;
1964 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetYref(1) - 130.0*curv) * 1.9);
1965 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetZref(1)
1966 - cseed[sLayer+0].GetZref(0) / xcl[sLayer+0]) * 5.9);
1967 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1969 seedquality[registered] = like;
1970 seedlayer[registered] = sLayer;
1971 if (TMath::Log(0.000000000000001 + like) < -15) {
1974 AliTRDseed seedb[6];
1975 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1976 seedb[iLayer] = cseed[iLayer];
1979 ////////////////////////////////////////////////////////////////////////////////////
1981 // Full track fit part
1983 ////////////////////////////////////////////////////////////////////////////////////
1990 // Add new layers - avoid long extrapolation
1992 Int_t tLayer[2] = { 0, 0 };
2006 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2007 Int_t jLayer = tLayer[iLayer]; // Set tracking layer
2008 cseed[jLayer].Reset();
2009 cseed[jLayer].SetTilt(hL[jLayer]);
2010 cseed[jLayer].SetPadLength(padlength[jLayer]);
2011 cseed[jLayer].SetX0(xcl[jLayer]);
2012 // Get pad length and rough cluster
2013 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].GetYref(0)
2014 ,cseed[jLayer].GetZref(0)
2017 if (indexdummy <= 0) {
2020 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
2021 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
2023 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2025 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2027 Int_t jLayer = tLayer[iLayer]; // set tracking layer
2028 if ((jLayer == 0) && !(cseed[1].IsOK())) {
2029 continue; // break not allowed
2031 if ((jLayer == 5) && !(cseed[4].IsOK())) {
2032 continue; // break not allowed
2034 Float_t zexp = cseed[jLayer].GetZref(0);
2035 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
2037 for (Int_t iter = 0; iter < 2; iter++) {
2039 AliTRDseed tseed = cseed[jLayer];
2040 Float_t quality = 10000.0;
2042 for (Int_t iTime = 2; iTime < 20; iTime++) {
2043 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
2044 Double_t dxlayer = layer.GetX()-xcl[jLayer];
2045 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
2046 Float_t yroad = kRoad1y;
2047 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
2051 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2052 tseed.SetIndexes(iTime,index);
2053 tseed.SetClusters(iTime,cl); // Register cluster
2054 tseed.SetX(iTime,dxlayer); // Register cluster
2055 tseed.SetY(iTime,cl->GetY()); // Register cluster
2056 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2061 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2062 Float_t tquality = (18.0 - tseed.GetN2())/2.0 + TMath::Abs(dangle) / 0.1
2063 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
2064 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2065 if (tquality < quality) {
2066 cseed[jLayer] = tseed;
2075 if ( cseed[jLayer].IsOK()) {
2076 cseed[jLayer].CookLabels();
2077 cseed[jLayer].UpdateUsed();
2078 nusedf += cseed[jLayer].GetNUsed();
2079 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2085 AliTRDseed bseed[6];
2086 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2087 bseed[jLayer] = cseed[jLayer];
2089 Float_t lastquality = 10000.0;
2090 Float_t lastchi2 = 10000.0;
2091 Float_t chi2 = 1000.0;
2093 for (Int_t iter = 0; iter < 4; iter++) {
2095 // Sort tracklets according "quality", try to "improve" 4 worst
2096 Float_t sumquality = 0.0;
2097 Float_t squality[6];
2098 Int_t sortindexes[6];
2100 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2101 if (bseed[jLayer].IsOK()) {
2102 AliTRDseed &tseed = bseed[jLayer];
2103 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2104 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2105 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
2106 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2107 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2108 squality[jLayer] = tquality;
2111 squality[jLayer] = -1.0;
2113 sumquality +=squality[jLayer];
2116 if ((sumquality >= lastquality) ||
2117 (chi2 > lastchi2)) {
2120 lastquality = sumquality;
2123 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2124 cseed[jLayer] = bseed[jLayer];
2127 TMath::Sort(6,squality,sortindexes,kFALSE);
2129 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
2131 Int_t bLayer = sortindexes[jLayer];
2132 AliTRDseed tseed = bseed[bLayer];
2134 for (Int_t iTime = 2; iTime < 20; iTime++) {
2136 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
2137 Double_t dxlayer = layer.GetX() - xcl[bLayer];
2138 Double_t zexp = tseed.GetZref(0);
2139 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2140 Float_t roadz = padlength[bLayer] + 1;
2141 if (TMath::Abs(tseed.GetZProb() - zexp) > 0.5*padlength[bLayer]) {
2142 roadz = padlength[bLayer] * 0.5;
2144 if (tseed.GetZfit(1)*tseed.GetZref(1) < 0.0) {
2145 roadz = padlength[bLayer] * 0.5;
2147 if (TMath::Abs(tseed.GetZProb() - zexp) < 0.1*padlength[bLayer]) {
2148 zexp = tseed.GetZProb();
2149 roadz = padlength[bLayer] * 0.5;
2152 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer - zcor;
2153 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
2157 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2159 tseed.SetIndexes(iTime,index);
2160 tseed.SetClusters(iTime,cl); // Register cluster
2161 tseed.SetX(iTime,dxlayer); // Register cluster
2162 tseed.SetY(iTime,cl->GetY()); // Register cluster
2163 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2169 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2170 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2171 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0
2172 + TMath::Abs(dangle) / 0.1
2173 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2174 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2175 if (tquality<squality[bLayer]) {
2176 bseed[bLayer] = tseed;
2182 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
2189 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2190 if (TMath::Abs(cseed[iLayer].GetYref(0) / cseed[iLayer].GetX0()) < 0.15) {
2193 if (cseed[iLayer].IsOK()) {
2194 nclusters += cseed[iLayer].GetN2();
2202 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2203 if (cseed[iLayer].IsOK()) {
2204 rieman.AddPoint(xcl[iLayer]
2205 ,cseed[iLayer].GetYfitR(0)
2206 ,cseed[iLayer].GetZProb()
2215 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2216 if (cseed[iLayer].IsOK()) {
2217 cseed[iLayer].SetYref(0,rieman.GetYat(xcl[iLayer]));
2218 chi2RF += (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0))
2219 * (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0));
2220 cseed[iLayer].SetYref(1,rieman.GetDYat(xcl[iLayer]));
2221 cseed[iLayer].SetZref(0,rieman.GetZat(xcl[iLayer]));
2222 chi2ZF += (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz())
2223 * (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz());
2224 cseed[iLayer].SetZref(1,rieman.GetDZat(xcl[iLayer]));
2227 chi2RF /= TMath::Max((nlayers - 3.0),1.0);
2228 chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
2229 curv = rieman.GetC();
2231 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
2232 Double_t dzmf = rieman.GetDZat(xref2);
2233 Double_t zmf = rieman.GetZat(xref2);
2239 fitterTC.ClearPoints();
2240 fitterT2.ClearPoints();
2243 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2245 if (!cseed[iLayer].IsOK()) {
2249 for (Int_t itime = 0; itime < 25; itime++) {
2251 if (!cseed[iLayer].IsUsable(itime)) {
2254 // X relative to the middle chamber
2255 Double_t x = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0() - xref2;
2256 Double_t y = cseed[iLayer].GetY(itime);
2257 Double_t z = cseed[iLayer].GetZ(itime);
2258 // ExB correction to the correction
2262 Double_t x2 = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0();
2263 Double_t t = 1.0 / (x2*x2 + y*y);
2265 uvt[0] = 2.0 * x2 * uvt[1]; // u
2266 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
2267 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
2268 uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
2269 Double_t error = 2.0 * 0.2 * uvt[1];
2270 fitterT2.AddPoint(uvt,uvt[4],error);
2273 // Constrained rieman
2275 z = cseed[iLayer].GetZ(itime);
2276 uvt[0] = 2.0 * x2 * t; // u
2277 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
2278 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
2279 fitterTC.AddPoint(uvt,uvt[2],error);
2280 rieman2.AddPoint(x2,y,z,1,10);
2290 Double_t rpolz0 = fitterT2.GetParameter(3);
2291 Double_t rpolz1 = fitterT2.GetParameter(4);
2294 // Linear fitter - not possible to make boundaries
2295 // Do not accept non possible z and dzdx combinations
2297 Bool_t acceptablez = kTRUE;
2298 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2299 if (cseed[iLayer].IsOK()) {
2300 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2301 if (TMath::Abs(cseed[iLayer].GetZProb() - zT2) > padlength[iLayer] * 0.5 + 1.0) {
2302 acceptablez = kFALSE;
2307 fitterT2.FixParameter(3,zmf);
2308 fitterT2.FixParameter(4,dzmf);
2310 fitterT2.ReleaseParameter(3);
2311 fitterT2.ReleaseParameter(4);
2312 rpolz0 = fitterT2.GetParameter(3);
2313 rpolz1 = fitterT2.GetParameter(4);
2316 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2317 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2318 Double_t polz1c = fitterTC.GetParameter(2);
2319 Double_t polz0c = polz1c * xref2;
2320 Double_t aC = fitterTC.GetParameter(0);
2321 Double_t bC = fitterTC.GetParameter(1);
2322 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2323 Double_t aR = fitterT2.GetParameter(0);
2324 Double_t bR = fitterT2.GetParameter(1);
2325 Double_t dR = fitterT2.GetParameter(2);
2326 Double_t cR = 1.0 + bR*bR - dR*aR;
2329 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2330 cR = aR / TMath::Sqrt(cR);
2333 Double_t chi2ZT2 = 0.0;
2334 Double_t chi2ZTC = 0.0;
2335 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2336 if (cseed[iLayer].IsOK()) {
2337 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2338 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2339 chi2ZT2 += TMath::Abs(cseed[iLayer].GetMeanz() - zT2);
2340 chi2ZTC += TMath::Abs(cseed[iLayer].GetMeanz() - zTC);
2343 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2344 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2346 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2347 Float_t sumdaf = 0.0;
2348 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2349 if (cseed[iLayer].IsOK()) {
2350 sumdaf += TMath::Abs((cseed[iLayer].GetYfit(1) - cseed[iLayer].GetYref(1))
2351 / cseed[iLayer].GetSigmaY2());
2354 sumdaf /= Float_t (nlayers - 2.0);
2357 // Likelihoods for full track
2359 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2360 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2361 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2362 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2363 seedquality2[registered] = likezf * likechi2TR * likeaf;
2365 // Still needed ????
2366 // Bool_t isGold = kFALSE;
2368 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2369 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2370 // if (isGold &&nusedf<10){
2371 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2372 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2373 // seed[index][jLayer].UseClusters(); //sign gold
2378 if (!cseed[0].IsOK()) {
2380 if (!cseed[1].IsOK()) {
2384 seedparams[registered][0] = cseed[index0].GetX0();
2385 seedparams[registered][1] = cseed[index0].GetYref(0);
2386 seedparams[registered][2] = cseed[index0].GetZref(0);
2387 seedparams[registered][5] = cR;
2388 seedparams[registered][3] = cseed[index0].GetX0() * cR - TMath::Sin(TMath::ATan(cseed[0].GetYref(1)));
2389 seedparams[registered][4] = cseed[index0].GetZref(1)
2390 / TMath::Sqrt(1.0 + cseed[index0].GetYref(1) * cseed[index0].GetYref(1));
2391 seedparams[registered][6] = ns;
2396 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2397 if (!cseed[iLayer].IsOK()) {
2400 if (cseed[iLayer].GetLabels(0) >= 0) {
2401 labels[nlab] = cseed[iLayer].GetLabels(0);
2404 if (cseed[iLayer].GetLabels(1) >= 0) {
2405 labels[nlab] = cseed[iLayer].GetLabels(1);
2409 Freq(nlab,labels,outlab,kFALSE);
2410 Int_t label = outlab[0];
2411 Int_t frequency = outlab[1];
2412 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2413 cseed[iLayer].SetFreq(frequency);
2414 cseed[iLayer].SetC(cR);
2415 cseed[iLayer].SetCC(cC);
2416 cseed[iLayer].SetChi2(chi2TR);
2417 cseed[iLayer].SetChi2Z(chi2ZF);
2421 if (1 || (!isFake)) {
2422 Float_t zvertex = GetZ();
2423 TTreeSRedirector &cstream = *fDebugStreamer;
2424 if (AliTRDReconstructor::StreamLevel() > 0) {
2426 << "isFake=" << isFake
2427 << "Vertex=" << zvertex
2428 << "Rieman2.=" << &rieman2
2429 << "Rieman.=" << &rieman
2437 << "Chi2R=" << chi2R
2438 << "Chi2Z=" << chi2Z
2439 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2440 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2441 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2442 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2443 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2444 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2445 << "C=" << curv // Non constrained - no tilt correction
2446 << "DR=" << dR // DR parameter - tilt correction
2447 << "DCA=" << dca // DCA - tilt correction
2448 << "CR=" << cR // Non constrained curvature - tilt correction
2449 << "CC=" << cC // Constrained curvature
2450 << "Polz0=" << polz0c
2451 << "Polz1=" << polz1c
2452 << "RPolz0=" << rpolz0
2453 << "RPolz1=" << rpolz1
2454 << "Ncl=" << nclusters
2455 << "Nlayers=" << nlayers
2456 << "NUsedS=" << nusedCl
2457 << "NUsed=" << nusedf
2458 << "Findable=" << findable
2460 << "LikePrim=" << likePrim
2461 << "Likechi2C=" << likechi2C
2462 << "Likechi2TR=" << likechi2TR
2463 << "Likezf=" << likezf
2464 << "LikeF=" << seedquality2[registered]
2465 << "S0.=" << &cseed[0]
2466 << "S1.=" << &cseed[1]
2467 << "S2.=" << &cseed[2]
2468 << "S3.=" << &cseed[3]
2469 << "S4.=" << &cseed[4]
2470 << "S5.=" << &cseed[5]
2471 << "SB0.=" << &seedb[0]
2472 << "SB1.=" << &seedb[1]
2473 << "SB2.=" << &seedb[2]
2474 << "SB3.=" << &seedb[3]
2475 << "SB4.=" << &seedb[4]
2476 << "SB5.=" << &seedb[5]
2477 << "Label=" << label
2478 << "Freq=" << frequency
2479 << "sLayer=" << sLayer
2484 if (registered<kMaxSeed - 1) {
2486 cseed = seed[registered];
2489 } // End of loop over layer 1
2491 } // End of loop over layer 0
2493 } // End of loop over layer 3
2495 } // End of loop over seeding time bins
2501 TMath::Sort(registered,seedquality2,sort,kTRUE);
2502 Bool_t signedseed[kMaxSeed];
2503 for (Int_t i = 0; i < registered; i++) {
2504 signedseed[i] = kFALSE;
2507 for (Int_t iter = 0; iter < 5; iter++) {
2509 for (Int_t iseed = 0; iseed < registered; iseed++) {
2511 Int_t index = sort[iseed];
2512 if (signedseed[index]) {
2515 Int_t labelsall[1000];
2516 Int_t nlabelsall = 0;
2517 Int_t naccepted = 0;;
2518 Int_t sLayer = seedlayer[index];
2524 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2526 if (TMath::Abs(seed[index][jLayer].GetYref(0) / xcl[jLayer]) < 0.15) {
2529 if (seed[index][jLayer].IsOK()) {
2530 seed[index][jLayer].UpdateUsed();
2531 ncl +=seed[index][jLayer].GetN2();
2532 nused +=seed[index][jLayer].GetNUsed();
2535 for (Int_t itime = 0; itime < 25; itime++) {
2536 if (seed[index][jLayer].IsUsable(itime)) {
2538 for (Int_t ilab = 0; ilab < 3; ilab++) {
2539 Int_t tindex = seed[index][jLayer].GetClusters(itime)->GetLabel(ilab);
2541 labelsall[nlabelsall] = tindex;
2559 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2565 if (nlayers < findable) {
2568 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
2574 if ((nlayers == findable) ||
2578 if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
2584 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2590 if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
2595 signedseed[index] = kTRUE;
2600 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2601 if (seed[index][iLayer].IsOK()) {
2602 if (seed[index][iLayer].GetLabels(0) >= 0) {
2603 labels[nlab] = seed[index][iLayer].GetLabels(0);
2606 if (seed[index][iLayer].GetLabels(1) >= 0) {
2607 labels[nlab] = seed[index][iLayer].GetLabels(1);
2612 Freq(nlab,labels,outlab,kFALSE);
2613 Int_t label = outlab[0];
2614 Int_t frequency = outlab[1];
2615 Freq(nlabelsall,labelsall,outlab,kFALSE);
2616 Int_t label1 = outlab[0];
2617 Int_t label2 = outlab[2];
2618 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2619 Float_t ratio = Float_t(nused) / Float_t(ncl);
2621 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2622 if ((seed[index][jLayer].IsOK()) &&
2623 (TMath::Abs(seed[index][jLayer].GetYfit(1) - seed[index][jLayer].GetYfit(1)) < 0.2)) {
2624 seed[index][jLayer].UseClusters(); // Sign gold
2629 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.
2630 TTreeSRedirector &cstream = *fDebugStreamer;
2635 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2641 AliESDtrack esdtrack;
2642 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2643 esdtrack.SetLabel(label);
2644 esd->AddTrack(&esdtrack);
2645 TTreeSRedirector &cstream = *fDebugStreamer;
2646 if (AliTRDReconstructor::StreamLevel() > 0) {
2648 << "EventNrInFile=" << eventNrInFile
2649 << "ESD.=" << &esdtrack
2651 << "trdback.=" << track
2656 if (AliTRDReconstructor::StreamLevel() > 0) {
2659 << "Track.=" << track
2660 << "Like=" << seedquality[index]
2661 << "LikeF=" << seedquality2[index]
2662 << "S0.=" << &seed[index][0]
2663 << "S1.=" << &seed[index][1]
2664 << "S2.=" << &seed[index][2]
2665 << "S3.=" << &seed[index][3]
2666 << "S4.=" << &seed[index][4]
2667 << "S5.=" << &seed[index][5]
2668 << "Label=" << label
2669 << "Label1=" << label1
2670 << "Label2=" << label2
2671 << "FakeRatio=" << fakeratio
2672 << "Freq=" << frequency
2674 << "Nlayers=" << nlayers
2675 << "Findable=" << findable
2676 << "NUsed=" << nused
2677 << "sLayer=" << sLayer
2678 << "EventNrInFile=" << eventNrInFile
2686 } // End of loop over sectors
2692 //_____________________________________________________________________________
2693 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *clusterTree) const
2696 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2697 // from the file. The names of the cluster tree and branches
2698 // should match the ones used in AliTRDclusterizer::WriteClusters()
2701 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2702 TObjArray *clusterArray = new TObjArray(nsize+1000);
2704 TBranch *branch = clusterTree->GetBranch("TRDcluster");
2706 AliError("Can't get the branch !");
2709 branch->SetAddress(&clusterArray);
2711 // Loop through all entries in the tree
2712 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2714 AliTRDcluster *c = 0;
2715 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2718 nbytes += clusterTree->GetEvent(iEntry);
2720 // Get the number of points in the detector
2721 Int_t nCluster = clusterArray->GetEntriesFast();
2723 // Loop through all TRD digits
2724 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2725 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2726 AliTRDcluster *co = c;
2728 clusterArray->RemoveAt(iCluster);
2733 delete clusterArray;
2739 //_____________________________________________________________________________
2740 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2743 // Get track space point with index i
2744 // Origin: C.Cheshkov
2747 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2748 Int_t idet = cl->GetDetector();
2749 Int_t isector = fGeom->GetSector(idet);
2750 Int_t ichamber = fGeom->GetChamber(idet);
2751 Int_t iplan = fGeom->GetPlane(idet);
2753 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2754 local[1] = cl->GetY();
2755 local[2] = cl->GetZ();
2757 fGeom->RotateBack(idet,local,global);
2758 p.SetXYZ(global[0],global[1],global[2]);
2759 AliGeomManager::ELayerID iLayer = AliGeomManager::kTRD1;
2762 iLayer = AliGeomManager::kTRD1;
2765 iLayer = AliGeomManager::kTRD2;
2768 iLayer = AliGeomManager::kTRD3;
2771 iLayer = AliGeomManager::kTRD4;
2774 iLayer = AliGeomManager::kTRD5;
2777 iLayer = AliGeomManager::kTRD6;
2780 Int_t modId = isector * fGeom->Ncham() + ichamber;
2781 UShort_t volid = AliGeomManager::LayerToVolUID(iLayer,modId);
2782 p.SetVolumeID(volid);
2788 //_____________________________________________________________________________
2789 void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
2792 // This cooks a label. Mmmmh, smells good...
2795 Int_t label = 123456789;
2799 Int_t ncl = pt->GetNumberOfClusters();
2801 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2805 Int_t **s = new Int_t* [kRange];
2806 for (i = 0; i < kRange; i++) {
2807 s[i] = new Int_t[2];
2809 for (i = 0; i < kRange; i++) {
2818 for (i = 0; i < ncl; i++) {
2819 index = pt->GetClusterIndex(i);
2820 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2826 for (i = 0; i < ncl; i++) {
2827 index = pt->GetClusterIndex(i);
2828 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2829 for (Int_t k = 0; k < 3; k++) {
2830 label = c->GetLabel(k);
2831 labelAdded = kFALSE;
2834 while ((!labelAdded) && (j < kRange)) {
2835 if ((s[j][0] == label) ||
2838 s[j][1] = s[j][1] + 1;
2850 for (i = 0; i < kRange; i++) {
2851 if (s[i][1] > max) {
2857 for (i = 0; i < kRange; i++) {
2863 if ((1.0 - Float_t(max)/ncl) > wrong) {
2867 pt->SetLabel(label);
2871 //_____________________________________________________________________________
2872 void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
2875 // Use clusters, but don't abuse them!
2878 const Float_t kmaxchi2 = 18;
2879 const Float_t kmincl = 10;
2881 AliTRDtrack *track = (AliTRDtrack *) t;
2883 Int_t ncl = t->GetNumberOfClusters();
2884 for (Int_t i = from; i < ncl; i++) {
2885 Int_t index = t->GetClusterIndex(i);
2886 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2887 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2888 if (track->GetTracklets(iplane).GetChi2() > kmaxchi2) {
2891 if (track->GetTracklets(iplane).GetN() < kmincl) {
2894 if (!(c->IsUsed())) {
2901 //_____________________________________________________________________________
2902 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2905 // Parametrised "expected" error of the cluster reconstruction in Y
2908 Double_t s = 0.08 * 0.08;
2913 //_____________________________________________________________________________
2914 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2917 // Parametrised "expected" error of the cluster reconstruction in Z
2920 Double_t s = 9.0 * 9.0 / 12.0;
2925 //_____________________________________________________________________________
2926 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2929 // Returns radial position which corresponds to time bin <localTB>
2930 // in tracking sector <sector> and plane <plane>
2933 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2934 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2936 return fTrSec[sector]->GetLayer(pl)->GetX();
2940 //_____________________________________________________________________________
2941 AliTRDtracker::AliTRDpropagationLayer
2942 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2943 , Double_t radLength, Int_t tbIndex, Int_t plane)
2952 ,fTimeBinIndex(tbIndex)
2965 // AliTRDpropagationLayer constructor
2968 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2973 if (fTimeBinIndex >= 0) {
2974 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2975 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2978 for (Int_t i = 0; i < 5; i++) {
2979 fIsHole[i] = kFALSE;
2984 //_____________________________________________________________________________
2985 void AliTRDtracker::AliTRDpropagationLayer
2986 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2987 , Double_t radLength, Double_t Yc, Double_t Zc)
2990 // Sets hole in the layer
2999 fHoleX0 = radLength;
3003 //_____________________________________________________________________________
3004 AliTRDtracker::AliTRDtrackingSector
3005 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
3011 // AliTRDtrackingSector Constructor
3014 AliTRDpadPlane *padPlane = 0;
3015 AliTRDpropagationLayer *ppl = 0;
3017 // Get holes description from geometry
3018 Bool_t holes[AliTRDgeometry::kNcham];
3019 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3020 holes[icham] = fGeom->IsHole(0,icham,gs);
3023 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
3024 fTimeBinIndex[i] = -1;
3032 // Add layers for each of the planes
3033 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
3034 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
3036 const Int_t kNchambers = AliTRDgeometry::Ncham();
3039 Double_t ymaxsensitive = 0;
3040 Double_t *zc = new Double_t[kNchambers];
3041 Double_t *zmax = new Double_t[kNchambers];
3042 Double_t *zmaxsensitive = new Double_t[kNchambers];
3044 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3046 ymax = fGeom->GetChamberWidth(plane) / 2.0;
3047 padPlane = fGeom->GetPadPlane(plane,0);
3048 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
3050 for (Int_t ch = 0; ch < kNchambers; ch++) {
3051 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
3052 Float_t pad = padPlane->GetRowSize(1);
3053 Float_t row0 = fGeom->GetRow0(plane,ch,0);
3054 Int_t nPads = fGeom->GetRowMax(plane,ch,0);
3055 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
3056 zc[ch] = -(pad * nPads) / 2.0 + row0;
3059 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
3060 / AliTRDCommonParam::Instance()->GetSamplingFrequency();
3061 rho = 0.00295 * 0.85; //????
3064 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
3065 //Double_t xbottom = x0 - dxDrift;
3066 //Double_t xtop = x0 + dxAmp;
3068 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3069 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
3071 Double_t xlayer = iTime * dx - dxAmp;
3072 //if (xlayer<0) xlayer = dxAmp / 2.0;
3075 tbIndex = CookTimeBinIndex(plane,iTime);
3076 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
3077 ppl->SetYmax(ymax,ymaxsensitive);
3078 ppl->SetZ(zc,zmax,zmaxsensitive);
3079 ppl->SetHoles(holes);
3090 delete [] zmaxsensitive;
3094 //_____________________________________________________________________________
3095 AliTRDtracker::AliTRDtrackingSector
3096 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
3107 //_____________________________________________________________________________
3108 Int_t AliTRDtracker::AliTRDtrackingSector
3109 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
3112 // depending on the digitization parameters calculates "global"
3113 // time bin index for timebin <localTB> in plane <plane>
3117 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3118 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
3130 //_____________________________________________________________________________
3131 void AliTRDtracker::AliTRDtrackingSector
3132 ::MapTimeBinLayers()
3135 // For all sensitive time bins sets corresponding layer index
3136 // in the array fTimeBins
3141 for (Int_t i = 0; i < fN; i++) {
3143 index = fLayers[i]->GetTimeBinIndex();
3148 if (index >= (Int_t) kMaxTimeBinIndex) {
3149 //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
3150 // ,index,kMaxTimeBinIndex-1));
3154 fTimeBinIndex[index] = i;
3160 //_____________________________________________________________________________
3161 Int_t AliTRDtracker::AliTRDtrackingSector
3162 ::GetLayerNumber(Double_t x) const
3165 // Returns the number of time bin which in radial position is closest to <x>
3168 if (x >= fLayers[fN-1]->GetX()) {
3171 if (x <= fLayers[ 0]->GetX()) {
3177 Int_t m = (b + e) / 2;
3179 for ( ; b < e; m = (b + e) / 2) {
3180 if (x > fLayers[m]->GetX()) {
3188 if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
3197 //_____________________________________________________________________________
3198 Int_t AliTRDtracker::AliTRDtrackingSector
3199 ::GetInnerTimeBin() const
3202 // Returns number of the innermost SENSITIVE propagation layer
3205 return GetLayerNumber(0);
3209 //_____________________________________________________________________________
3210 Int_t AliTRDtracker::AliTRDtrackingSector
3211 ::GetOuterTimeBin() const
3214 // Returns number of the outermost SENSITIVE time bin
3217 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3221 //_____________________________________________________________________________
3222 Int_t AliTRDtracker::AliTRDtrackingSector
3223 ::GetNumberOfTimeBins() const
3226 // Returns number of SENSITIVE time bins
3232 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
3233 layer = GetLayerNumber(tb);
3243 //_____________________________________________________________________________
3244 void AliTRDtracker::AliTRDtrackingSector
3245 ::InsertLayer(AliTRDpropagationLayer *pl)
3248 // Insert layer <pl> in fLayers array.
3249 // Layers are sorted according to X coordinate.
3252 if (fN == ((Int_t) kMaxLayersPerSector)) {
3253 //AliWarning("Too many layers !\n");
3262 Int_t i = Find(pl->GetX());
3264 memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3271 //_____________________________________________________________________________
3272 Int_t AliTRDtracker::AliTRDtrackingSector
3273 ::Find(Double_t x) const
3276 // Returns index of the propagation layer nearest to X
3279 if (x <= fLayers[0]->GetX()) {
3283 if (x > fLayers[fN-1]->GetX()) {
3289 Int_t m = (b + e) / 2;
3291 for (; b < e; m = (b + e) / 2) {
3292 if (x > fLayers[m]->GetX()) {
3304 //_____________________________________________________________________________
3305 void AliTRDtracker::AliTRDpropagationLayer
3306 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3309 // set centers and the width of sectors
3312 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3313 fZc[icham] = center[icham];
3314 fZmax[icham] = w[icham];
3315 fZmaxSensitive[icham] = wsensitive[icham];
3320 //_____________________________________________________________________________
3321 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3324 // set centers and the width of sectors
3329 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3330 fIsHole[icham] = holes[icham];
3338 //_____________________________________________________________________________
3339 void AliTRDtracker::AliTRDpropagationLayer
3340 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3343 // Insert cluster in cluster array.
3344 // Clusters are sorted according to Y coordinate.
3347 if (fTimeBinIndex < 0) {
3348 //AliWarning("Attempt to insert cluster into non-sensitive time bin!\n");
3352 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3353 //AliWarning("Too many clusters !\n");
3359 fClusters[fN++] = c;
3363 Int_t i = Find(c->GetY());
3364 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3365 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3372 //_____________________________________________________________________________
3373 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3376 // Returns index of the cluster nearest in Y
3382 if (y <= fClusters[0]->GetY()) {
3385 if (y > fClusters[fN-1]->GetY()) {
3391 Int_t m = (b + e) / 2;
3393 for ( ; b < e; m = (b + e) / 2) {
3394 if (y > fClusters[m]->GetY()) {
3406 //_____________________________________________________________________________
3407 Int_t AliTRDtracker::AliTRDpropagationLayer
3408 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3409 , Float_t maxroadz) const
3412 // Returns index of the cluster nearest to the given y,z
3417 Float_t mindist = maxroad;
3419 for (Int_t i = Find(y-maxroad); i < maxn; i++) {
3420 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3421 Float_t ycl = c->GetY();
3422 if (ycl > (y + maxroad)) {
3425 if (TMath::Abs(c->GetZ() - z) > maxroadz) {
3428 if (TMath::Abs(ycl - y) < mindist) {
3429 mindist = TMath::Abs(ycl - y);
3438 //_____________________________________________________________________________
3439 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
3442 // Returns correction factor for tilted pads geometry
3445 Int_t det = c->GetDetector();
3446 Int_t plane = fGeom->GetPlane(det);
3447 AliTRDpadPlane *padPlane = fGeom->GetPadPlane(plane,0);
3448 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3459 //_____________________________________________________________________________
3460 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3461 , AliTRDtrack *track
3462 , Int_t *clusters, AliTRDtracklet &tracklet)
3466 // Try to find nearest clusters to the track in timebins from t0 to t1
3468 // Correction coeficients - depend on TRD parameters - to be changed accordingly
3474 Double_t xmean = 0.0; // Reference x
3475 Double_t dz[10][100];
3476 Double_t dy[10][100];
3480 Int_t indexes[10][100]; // Indexes of the clusters in the road
3481 Int_t best[10][100]; // Index of best matching cluster
3482 AliTRDcluster *cl[10][100]; // Pointers to the clusters in the road
3484 for (Int_t it = 0; it < 100; it++) {
3491 for (Int_t ih = 0; ih < 10;ih++) {
3492 indexes[ih][it] = -2; // Reset indexes1
3494 dz[ih][it] = -100.0;
3495 dy[ih][it] = -100.0;
3500 Double_t x0 = track->GetX();
3501 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3506 Int_t detector = -1;
3507 Float_t padlength = 0.0;
3508 AliTRDtrack track2(* track);
3509 Float_t snpy = track->GetSnp();
3510 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3515 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
3516 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3517 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3523 for (Int_t it = 0; it < t1-t0; it++) {
3525 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3526 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
3528 continue; // No indexes1
3531 Int_t maxn = timeBin;
3532 x[it] = timeBin.GetX();
3533 track2.PropagateTo(x[it]);
3534 yt[it] = track2.GetY();
3535 zt[it] = track2.GetZ();
3537 Double_t y = yt[it];
3538 Double_t z = zt[it];
3539 Double_t chi2 = 1000000.0;
3543 // Find 2 nearest cluster at given time bin
3545 int checkPoint[4] = {0,0,0,0};
3546 double minY = 123456789;
3547 double minD[2] = {1,1};
3549 for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
3550 //for (Int_t i = 0; i < maxn; i++) {
3552 AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
3553 h01 = GetTiltFactor(c);
3555 Int_t det = c->GetDetector();
3556 plane = fGeom->GetPlane(det);
3557 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3560 //if (c->GetLocalTimeBin()==0) continue;
3561 if (c->GetY() > (y + road)) {
3565 fHDeltaX->Fill(c->GetX() - x[it]);
3566 //printf("%f\t%f\t%f \n", c->GetX(), x[it], c->GetX()-x[it]);
3568 if (TMath::Abs(c->GetY()-y) < TMath::Abs(minY)) {
3570 minD[0] = c->GetY()-y;
3571 minD[1] = c->GetZ()-z;
3576 fHMinZ->Fill(c->GetZ() - z);
3577 if ((c->GetZ() - z) * (c->GetZ() - z) > 2 * (12.0 * sz2)) {
3582 Double_t dist = TMath::Abs(c->GetZ() - z);
3583 if (dist > (0.5 * padlength + 6.0 * sigmaz)) { // 0.5
3584 continue; // 6 sigma boundary cut
3588 Double_t cost = 0.0;
3589 // Sigma boundary cost function
3590 if (dist> (0.5 * padlength - sigmaz)){
3591 cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
3593 cost = (cost + 1.0) * (cost + 1.0);
3599 //Int_t label = TMath::Abs(track->GetLabel());
3600 //if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
3601 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3604 if (chi2 > maxChi2[1]) {
3609 detector = c->GetDetector();
3610 // Store the clusters in the road
3611 for (Int_t ih = 2; ih < 9; ih++) {
3612 if (cl[ih][it] == 0) {
3614 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3619 if (chi2 < maxChi2[0]) {
3620 maxChi2[1] = maxChi2[0];
3622 indexes[1][it] = indexes[0][it];
3623 cl[1][it] = cl[0][it];
3624 indexes[0][it] = timeBin.GetIndex(i);
3630 indexes[1][it] = timeBin.GetIndex(i);
3634 for(int iCheckPoint = 0; iCheckPoint<4; iCheckPoint++)
3635 fHFindCl[iCheckPoint]->Fill(checkPoint[iCheckPoint]);
3637 if (checkPoint[3]) {
3638 if (track->GetPt() > 0) fHMinYPos->Fill(minY);
3639 else fHMinYNeg->Fill(minY);
3641 fHMinD->Fill(minD[0], minD[1]);
3654 xmean /= Float_t(nfound); // Middle x
3655 track2.PropagateTo(xmean); // Propagate track to the center
3658 // Choose one of the variants
3663 Double_t sumdy = 0.0;
3664 Double_t sumdy2 = 0.0;
3665 Double_t sumx = 0.0;
3666 Double_t sumxy = 0.0;
3667 Double_t sumx2 = 0.0;
3668 Double_t mpads = 0.0;
3674 Double_t moffset[10]; // Mean offset
3675 Double_t mean[10]; // Mean value
3676 Double_t angle[10]; // Angle
3678 Double_t smoffset[10]; // Sigma of mean offset
3679 Double_t smean[10]; // Sigma of mean value
3680 Double_t sangle[10]; // Sigma of angle
3681 Double_t smeanangle[10]; // Correlation
3683 Double_t sigmas[10];
3684 Double_t tchi2s[10]; // Chi2s for tracklet
3686 for (Int_t it = 0; it < 10; it++) {
3692 moffset[it] = 0.0; // Mean offset
3693 mean[it] = 0.0; // Mean value
3694 angle[it] = 0.0; // Angle
3696 smoffset[it] = 1.0e5; // Sigma of mean offset
3697 smean[it] = 1.0e5; // Sigma of mean value
3698 sangle[it] = 1.0e5; // Sigma of angle
3699 smeanangle[it] = 0.0; // Correlation
3702 tchi2s[it] = 1.0e5; // Chi2s for tracklet
3709 for (Int_t it = 0; it < t1 - t0; it++) {
3713 for (Int_t dt = -3; dt <= 3; dt++) {
3717 if (it+dt > t1-t0) {
3720 if (!cl[0][it+dt]) {
3723 zmean[it] += cl[0][it+dt]->GetZ();
3726 zmean[it] /= nmean[it];
3729 for (Int_t it = 0; it < t1 - t0; it++) {
3733 for (Int_t ih = 0; ih < 10; ih++) {
3734 dz[ih][it] = -100.0;
3735 dy[ih][it] = -100.0;
3739 Double_t xcluster = cl[ih][it]->GetX();
3742 track2.GetProlongation(xcluster,ytrack,ztrack );
3743 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
3744 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
3751 if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
3753 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
3761 // Iterative choice of "best path"
3763 Int_t label = TMath::Abs(track->GetLabel());
3766 for (Int_t iter = 0; iter < 9; iter++) {
3781 for (Int_t it = 0; it < t1 - t0; it++) {
3783 if (!cl[best[iter][it]][it]) {
3787 // Calculates pad-row changes
3788 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3789 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3790 for (Int_t itd = it - 1; itd >= 0; itd--) {
3791 if (cl[best[iter][itd]][itd]) {
3792 zbefore = cl[best[iter][itd]][itd]->GetZ();
3796 for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
3797 if (cl[best[iter][itd]][itd]) {
3798 zafter = cl[best[iter][itd]][itd]->GetZ();
3802 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
3803 (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
3807 Double_t dx = x[it]-xmean; // Distance to reference x
3808 sumz += cl[best[iter][it]][it]->GetZ();
3810 sumdy += dy[best[iter][it]][it];
3811 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3814 sumxy += dx*dy[best[iter][it]][it];
3815 mpads += cl[best[iter][it]][it]->GetNPads();
3816 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3817 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3818 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3828 // calculates line parameters
3830 Double_t det = sum*sumx2 - sumx*sumx;
3831 angle[iter] = (sum*sumxy - sumx*sumdy) / det;
3832 mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
3833 meanz[iter] = sumz / sum;
3834 moffset[iter] = sumdy / sum;
3835 mpads /= sum; // Mean number of pads
3837 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3838 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3840 for (Int_t it = 0; it < t1 - t0; it++) {
3841 if (!cl[best[iter][it]][it]) {
3844 Double_t dx = x[it] - xmean;
3845 Double_t ytr = mean[iter] + angle[iter] * dx;
3846 sigma2 += (dy[best[iter][it]][it] - ytr)
3847 * (dy[best[iter][it]][it] - ytr);
3848 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3849 * (dy[best[iter][it]][it] - moffset[iter]);
3852 sigma2 /= (sum - 2); // Normalized residuals
3853 sigma1 /= (sum - 1); // Normalized residuals
3854 smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
3855 sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
3856 smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
3857 sigmas[iter] = TMath::Sqrt(sigma1);
3858 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3861 // Iterative choice of "better path"
3863 for (Int_t it = 0; it < t1 - t0; it++) {
3865 if (!cl[best[iter][it]][it]) {
3869 // Add unisochronity + angular effect contribution
3870 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3871 Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
3872 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3873 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3874 Double_t mindist = 100000.0;
3877 for (Int_t ih = 0; ih < 10; ih++) {
3881 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3882 dist2 *= dist2; // Chi2 distance
3883 if (dist2 < mindist) {
3888 best[iter+1][it] = ihbest;
3892 // Update best hypothesy if better chi2 according tracklet position and angle
3894 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3895 Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
3896 Double_t say = track->GetSigmaSnpY(); // track->fCey;
3897 //Double_t chi20 = mean[bestiter]*mean[bestiter ] / sy2+angle[bestiter]*angle[bestiter]/sa2;
3898 //Double_t chi21 = mean[iter]*mean[iter] / sy2+angle[iter]*angle[iter]/sa2;
3900 Double_t detchi = sy2*sa2 - say*say;
3901 Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
3903 Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
3904 + angle[bestiter] * angle[bestiter] * invers[1]
3905 + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
3906 Double_t chi21 = mean[iter] * mean[iter] * invers[0]
3907 + angle[iter] * angle[iter] * invers[1]
3908 + 2.0 * mean[iter] * angle[iter] * invers[2];
3909 tchi2s[iter] = chi21;
3911 if ((changes[iter] <= changes[bestiter]) &&
3921 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
3922 Short_t maxpos = -1;
3923 Float_t maxcharge = 0.0;
3924 Short_t maxpos4 = -1;
3925 Float_t maxcharge4 = 0.0;
3926 Short_t maxpos5 = -1;
3927 Float_t maxcharge5 = 0.0;
3929 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
3930 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
3932 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
3933 ,-AliTracker::GetBz()*0.1);
3934 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
3936 expectederr += (mpads - 3.5) * 0.04;
3938 if (changes[bestiter] > 1) {
3939 expectederr += changes[bestiter] * 0.01;
3941 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
3942 //if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
3943 //expectederr+=10000;
3945 for (Int_t it = 0; it < t1 - t0; it++) {
3947 if (!cl[best[bestiter][it]][it]) {
3951 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // Set cluster error
3952 if (!cl[best[bestiter][it]][it]->IsUsed()) {
3953 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
3954 //cl[best[bestiter][it]][it]->Use();
3957 // Time bins with maximal charge
3958 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
3959 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3960 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3963 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3964 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3965 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3966 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3970 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3971 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3972 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3973 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3977 // Time bins with maximal charge
3978 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
3979 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3980 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3983 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3984 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3985 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3986 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3990 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3991 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3992 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3993 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3997 clusters[it+t0] = indexes[best[bestiter][it]][it];
3999 // Still needed ????
4000 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 &&
4001 //cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0]
4002 // = indexes[best[bestiter][it]][it]; //Test
4007 // Set tracklet parameters
4009 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
4011 trackleterr2 += (mpads - 3.5) * 0.04;
4013 trackleterr2 += changes[bestiter] * 0.01;
4014 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
4015 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
4017 // Set tracklet parameters
4019 ,track2.GetY() + moffset[bestiter]
4023 tracklet.SetTilt(h01);
4024 tracklet.SetP0(mean[bestiter]);
4025 tracklet.SetP1(angle[bestiter]);
4026 tracklet.SetN(nfound);
4027 tracklet.SetNCross(changes[bestiter]);
4028 tracklet.SetPlane(plane);
4029 tracklet.SetSigma2(expectederr);
4030 tracklet.SetChi2(tchi2s[bestiter]);
4031 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
4032 track->SetTracklets(plane,tracklet);
4033 track->SetNWrong(track->GetNWrong() + nbad[0]);
4038 TClonesArray array0("AliTRDcluster");
4039 TClonesArray array1("AliTRDcluster");
4040 array0.ExpandCreateFast(t1 - t0 + 1);
4041 array1.ExpandCreateFast(t1 - t0 + 1);
4042 TTreeSRedirector &cstream = *fDebugStreamer;
4043 AliTRDcluster dummy;
4047 for (Int_t it = 0; it < t1 - t0; it++) {
4048 dy0[it] = dy[0][it];
4049 dyb[it] = dy[best[bestiter][it]][it];
4051 new(array0[it]) AliTRDcluster(*cl[0][it]);
4054 new(array0[it]) AliTRDcluster(dummy);
4056 if(cl[best[bestiter][it]][it]) {
4057 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
4060 new(array1[it]) AliTRDcluster(dummy);
4063 TGraph graph0(t1-t0,x,dy0);
4064 TGraph graph1(t1-t0,x,dyb);
4065 TGraph graphy(t1-t0,x,yt);
4066 TGraph graphz(t1-t0,x,zt);
4068 if (AliTRDReconstructor::StreamLevel() > 0) {
4069 cstream << "tracklet"
4070 << "track.=" << track // Track parameters
4071 << "tany=" << tany // Tangent of the local track angle
4072 << "xmean=" << xmean // Xmean - reference x of tracklet
4073 << "tilt=" << h01 // Tilt angle
4074 << "nall=" << nall // Number of foundable clusters
4075 << "nfound=" << nfound // Number of found clusters
4076 << "clfound=" << clfound // Total number of found clusters in road
4077 << "mpads=" << mpads // Mean number of pads per cluster
4078 << "plane=" << plane // Plane number
4079 << "detector=" << detector // Detector number
4080 << "road=" << road // The width of the used road
4081 << "graph0.=" << &graph0 // x - y = dy for closest cluster
4082 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
4083 << "graphy.=" << &graphy // y position of the track
4084 << "graphz.=" << &graphz // z position of the track
4085 //<< "fCl.=" << &array0 // closest cluster
4086 //<< "fCl2.=" << &array1 // second closest cluster
4087 << "maxpos=" << maxpos // Maximal charge postion
4088 << "maxcharge=" << maxcharge // Maximal charge
4089 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
4090 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
4091 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
4092 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
4093 << "bestiter=" << bestiter // Best iteration number
4094 << "tracklet.=" << &tracklet // Corrspond to the best iteration
4095 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
4096 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
4097 << "sigmas0=" << sigmas[0] // Residuals sigma
4098 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
4099 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
4100 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
4101 << "ngoodb=" << ngood[bestiter] // in best iteration
4102 << "nbadb=" << nbad[bestiter] // in best iteration
4103 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
4104 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
4105 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
4106 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
4107 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
4108 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
4109 << "mean0=" << mean[0] // Mean dy in iter=0;
4110 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
4111 << "meanb=" << mean[bestiter] // Mean dy in iter=best
4112 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
4113 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
4114 << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
4115 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
4116 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
4117 << "expectederr=" << expectederr // Expected error of cluster position
4125 //_____________________________________________________________________________
4126 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
4127 , Int_t *outlist, Bool_t down)
4130 // Sort eleements according occurancy
4131 // The size of output array has is 2*n
4134 Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
4135 Int_t *sindexF = new Int_t[2*n];
4136 for (Int_t i = 0; i < n; i++) {
4140 TMath::Sort(n,inlist,sindexS,down);
4142 Int_t last = inlist[sindexS[0]];
4145 sindexF[0+n] = last;
4149 for (Int_t i = 1; i < n; i++) {
4150 val = inlist[sindexS[i]];
4152 sindexF[countPos]++;
4156 sindexF[countPos+n] = val;
4157 sindexF[countPos]++;
4165 // Sort according frequency
4166 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
4168 for (Int_t i = 0; i < countPos; i++) {
4169 outlist[2*i ] = sindexF[sindexS[i]+n];
4170 outlist[2*i+1] = sindexF[sindexS[i]];
4180 //_____________________________________________________________________________
4181 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
4187 Double_t alpha = AliTRDgeometry::GetAlpha();
4188 Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
4192 c[ 1] = 0.0; c[ 2] = 2.0;
4193 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
4194 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
4195 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4198 AliTRDcluster *cl = 0;
4200 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
4201 if (seeds[ilayer].IsOK()) {
4202 for (Int_t itime = 22; itime > 0; itime--) {
4203 if (seeds[ilayer].GetIndexes(itime) > 0) {
4204 index = seeds[ilayer].GetIndexes(itime);
4205 cl = seeds[ilayer].GetClusters(itime);
4218 AliTRDtrack *track = new AliTRDtrack(cl
4223 ,params[6]*alpha+shift);
4224 // SetCluster(cl, 0); // A. Bercuci
4225 track->PropagateTo(params[0]-5.0);
4226 track->ResetCovariance(1);
4228 Int_t rc = FollowBackProlongation(*track);
4235 track->CookdEdxTimBin();
4236 CookLabel(track,0.9);
4242 //////////////////////////////////////////////////////////////////////////////////////////
4244 void AliTRDtracker::InitLogHists() {
4246 fHBackfit = new TH1D("logTRD_backfit", "", 40, -0.5, 39.5);
4247 fHRefit = new TH1D("logTRD_refit", "", 40, -0.5, 39.5);
4248 fHClSearch = new TH1D("logTRD_clSearch", "", 60, -0.5, 59.5);
4250 fHX = new TH1D("logTRD_X", ";x (cm)", 200, 50, 400);
4251 fHNCl = new TH1D("logTRD_ncl", "", 40, -0.5, 39.5);
4252 fHNClTrack = new TH1D("logTRD_nclTrack", "", 180, -0.5, 179.5);
4254 fHMinYPos = new TH1D("logTRD_minYPos", ";#delta Y (cm)", 400, -6, 6);
4255 fHMinYNeg = new TH1D("logTRD_minYNeg", ";#delta Y (cm)", 400, -6, 6);
4256 fHMinZ = new TH1D("logTRD_minZ", ";#delta Z (cm)", 400, -20, 20);
4257 fHMinD = new TH2D("logTRD_minD", ";#delta Y (cm);#delta Z (cm)", 100, -6, 6, 100, -50, 50);
4259 fHDeltaX = new TH1D("logTRD_deltaX", ";#delta X (cm)", 100, -5, 5);
4260 fHXCl = new TH1D("logTRD_xCl", ";cluster x position (cm)", 1000, 280, 380);
4262 const char *nameFindCl[4] = {"logTRD_clY", "logTRD_clZ", "logTRD_clB", "logTRD_clG"};
4264 for(int i=0; i<4; i++) {
4265 fHFindCl[i] = new TH1D(nameFindCl[i], "", 30, -0.5, 29.5);
4269 //////////////////////////////////////////////////////////////////////////////////////////
4271 void AliTRDtracker::SaveLogHists() {
4273 TDirectory *sav = gDirectory;
4276 TSeqCollection *col = gROOT->GetListOfFiles();
4277 int N = col->GetEntries();
4278 for(int i=0; i<N; i++) {
4279 logFile = (TFile*)col->At(i);
4280 if (strstr(logFile->GetName(), "AliESDs.root")) break;
4284 fHBackfit->Write(fHBackfit->GetName(), TObject::kOverwrite);
4285 fHRefit->Write(fHRefit->GetName(), TObject::kOverwrite);
4286 fHClSearch->Write(fHClSearch->GetName(), TObject::kOverwrite);
4287 fHX->Write(fHX->GetName(), TObject::kOverwrite);
4288 fHNCl->Write(fHNCl->GetName(), TObject::kOverwrite);
4289 fHNClTrack->Write(fHNClTrack->GetName(), TObject::kOverwrite);
4291 fHMinYPos->Write(fHMinYPos->GetName(), TObject::kOverwrite);
4292 fHMinYNeg->Write(fHMinYNeg->GetName(), TObject::kOverwrite);
4293 fHMinD->Write(fHMinD->GetName(), TObject::kOverwrite);
4294 fHMinZ->Write(fHMinZ->GetName(), TObject::kOverwrite);
4296 fHDeltaX->Write(fHDeltaX->GetName(), TObject::kOverwrite);
4297 fHXCl->Write(fHXCl->GetName(), TObject::kOverwrite);
4300 for(int i=0; i<4; i++)
4301 fHFindCl[i]->Write(fHFindCl[i]->GetName(), TObject::kOverwrite);
4308 //////////////////////////////////////////////////////////////////////////////////////////