1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // The standard TRD tracker //
21 // Based on Kalman filltering approach //
24 // M. Ivanov (Marian.Ivanov@cern.ch) //
25 // Y. Belikov (Jouri.Belikov@cern.ch) //
27 ///////////////////////////////////////////////////////////////////////////////
30 #include <Riostream.h>
36 #include <TLinearFitter.h>
37 #include <TObjArray.h>
40 #include <TTreeStream.h>
43 #include "AliAlignObj.h"
44 #include "AliRieman.h"
45 #include "AliTrackPointArray.h"
47 #include "AliTRDgeometry.h"
48 #include "AliTRDpadPlane.h"
49 #include "AliTRDgeometry.h"
50 #include "AliTRDcluster.h"
51 #include "AliTRDtrack.h"
52 #include "AliTRDseed.h"
53 #include "AliTRDcalibDB.h"
54 #include "AliTRDCommonParam.h"
55 #include "AliTRDtracker.h"
56 #include "AliTRDReconstructor.h"
57 #include "AliTRDCalibra.h"
58 ClassImp(AliTRDtracker)
60 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
61 const Float_t AliTRDtracker::fgkLabelFraction = 0.8; // ??
62 const Double_t AliTRDtracker::fgkMaxChi2 = 12.0;
63 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Corresponds to tan = 3
64 const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
66 //_____________________________________________________________________________
67 AliTRDtracker::AliTRDtracker()
94 // Default constructor
97 for (Int_t i = 0; i < kTrackingSectors; i++) {
100 for (Int_t j = 0; j < 5; j++) {
101 for (Int_t k = 0; k < 18; k++) {
102 fHoles[j][k] = kFALSE;
110 //_____________________________________________________________________________
111 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
132 ,fTimeBinsPerPlane(0)
133 ,fAddTRDseeds(kFALSE)
143 //_____________________________________________________________________________
144 AliTRDtracker::AliTRDtracker(const TFile *geomfile)
160 ,fClusters(new TObjArray(2000))
162 ,fSeeds(new TObjArray(2000))
164 ,fTracks(new TObjArray(1000))
165 ,fTimeBinsPerPlane(0)
166 ,fAddTRDseeds(kFALSE)
174 TDirectory *savedir = gDirectory;
175 TFile *in = (TFile *) geomfile;
178 AliWarning("geometry file is not open!\n");
179 AliWarning("FULL TRD geometry and DEFAULT TRD parameter will be used\n");
183 fGeom = (AliTRDgeometry *) in->Get("TRDgeometry");
187 AliWarning("Cannot find TRD geometry!\n");
188 fGeom = new AliTRDgeometry();
190 fGeom->ReadGeoMatrices();
194 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
196 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
197 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
198 fHoles[icham][trS] = fGeom->IsHole(0,icham,geomS);
202 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
203 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
204 if (tiltAngle < 0.1) {
208 if (!AliTRDcalibDB::Instance()) {
209 AliFatal("Could not get calibration object");
211 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
213 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
221 //_____________________________________________________________________________
222 AliTRDtracker::~AliTRDtracker()
225 // Destructor of AliTRDtracker
245 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
246 delete fTrSec[geomS];
249 if (fDebugStreamer) {
250 delete fDebugStreamer;
255 //_____________________________________________________________________________
256 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
259 // Transform internal TRD ID to global detector ID
262 Int_t isector = fGeom->GetSector(lid);
263 Int_t ichamber = fGeom->GetChamber(lid);
264 Int_t iplan = fGeom->GetPlane(lid);
266 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
269 iLayer = AliAlignObj::kTRD1;
272 iLayer = AliAlignObj::kTRD2;
275 iLayer = AliAlignObj::kTRD3;
278 iLayer = AliAlignObj::kTRD4;
281 iLayer = AliAlignObj::kTRD5;
284 iLayer = AliAlignObj::kTRD6;
288 Int_t modId = isector * fGeom->Ncham() + ichamber;
289 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
295 //_____________________________________________________________________________
296 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
299 // Transform global detector ID to local detector ID
303 AliAlignObj::ELayerID layerId = AliAlignObj::VolUIDToLayer(gid,modId);
305 Int_t isector = modId / fGeom->Ncham();
306 Int_t ichamber = modId % fGeom->Ncham();
310 case AliAlignObj::kTRD1:
313 case AliAlignObj::kTRD2:
316 case AliAlignObj::kTRD3:
319 case AliAlignObj::kTRD4:
322 case AliAlignObj::kTRD5:
325 case AliAlignObj::kTRD6:
336 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
342 //_____________________________________________________________________________
343 Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
346 // Transform something ... whatever ...
349 // Magic constants for geo manager transformation
350 const Double_t kX0shift = 2.52;
351 const Double_t kX0shift5 = 3.05;
354 // Apply alignment and calibration to transform cluster
356 Int_t detector = cluster->GetDetector();
357 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
358 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
359 Int_t sector = fGeom->GetSector(cluster->GetDetector());
361 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
362 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.0); // Drift distance
367 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
368 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
370 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
371 AliTRDpadPlane *padPlane = commonParam->GetPadPlane(plane,chamber);
372 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
373 Double_t localPos[3];
374 Double_t localPosTracker[3];
375 localPos[0] = -cluster->GetX();
376 localPos[1] = cluster->GetY() - driftX * exB;
377 localPos[2] = cluster->GetZ() - zshiftIdeal;
379 cluster->SetY(cluster->GetY() - driftX*exB);
380 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
381 cluster->SetX(xplane- cluster->GetX());
383 TGeoHMatrix *matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
385 // No matrix found - if somebody used geometry with holes
386 AliError("Invalid Geometry - Default Geometry used\n");
389 matrix->LocalToMaster(localPos,localPosTracker);
391 if (AliTRDReconstructor::StreamLevel() > 1) {
392 (* fDebugStreamer) << "Transform"
394 << "matrix.=" << matrix
395 << "Detector=" << detector
396 << "Sector=" << sector
398 << "Chamber=" << chamber
399 << "lx0=" << localPosTracker[0]
400 << "ly0=" << localPosTracker[1]
401 << "lz0=" << localPosTracker[2]
406 cluster->SetX(localPosTracker[0]+kX0shift5);
409 cluster->SetX(localPosTracker[0]+kX0shift);
412 cluster->SetY(localPosTracker[1]);
413 cluster->SetZ(localPosTracker[2]);
419 //_____________________________________________________________________________
420 // Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
423 // // Is this still needed ????
425 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
426 // const Double_t kTime0Cor = 0.32; // time0 correction
428 // const Double_t kX0shift = 2.52;
429 // const Double_t kX0shift5 = 3.05;
432 // // apply alignment and calibration to transform cluster
435 // Int_t detector = cluster->GetDetector();
436 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
437 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
438 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
440 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
441 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
445 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
446 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift,-AliTracker::GetBz()*0.1);
449 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
450 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
451 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
452 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
453 // localPos[2] = -cluster->GetX();
454 // localPos[0] = cluster->GetY() - driftX*exB;
455 // localPos[1] = cluster->GetZ() -zshiftIdeal;
456 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
457 // matrix->LocalToMaster(localPos, globalPos);
459 // Double_t sectorAngle = 20.*(sector%18)+10;
460 // TGeoHMatrix rotSector;
461 // rotSector.RotateZ(sectorAngle);
462 // rotSector.LocalToMaster(globalPos, localPosTracker);
465 // TGeoHMatrix matrix2(*matrix);
466 // matrix2.MultiplyLeft(&rotSector);
467 // matrix2.LocalToMaster(localPos,localPosTracker2);
471 // cluster->SetY(cluster->GetY() - driftX*exB);
472 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
473 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
474 // (*fDebugStreamer)<<"Transform"<<
476 // "matrix.="<<matrix<<
477 // "matrix2.="<<&matrix2<<
478 // "Detector="<<detector<<
479 // "Sector="<<sector<<
481 // "Chamber="<<chamber<<
482 // "lx0="<<localPosTracker[0]<<
483 // "ly0="<<localPosTracker[1]<<
484 // "lz0="<<localPosTracker[2]<<
485 // "lx2="<<localPosTracker2[0]<<
486 // "ly2="<<localPosTracker2[1]<<
487 // "lz2="<<localPosTracker2[2]<<
491 // cluster->SetX(localPosTracker[0]+kX0shift5);
493 // cluster->SetX(localPosTracker[0]+kX0shift);
495 // cluster->SetY(localPosTracker[1]);
496 // cluster->SetZ(localPosTracker[2]);
500 //_____________________________________________________________________________
501 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
504 // Rotates the track when necessary
507 Double_t alpha = AliTRDgeometry::GetAlpha();
508 Double_t y = track->GetY();
509 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
511 // Is this still needed ????
512 //Int_t ns = AliTRDgeometry::kNsect;
513 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
517 if (!track->Rotate( alpha)) {
521 else if (y < -ymax) {
523 if (!track->Rotate(-alpha)) {
532 //_____________________________________________________________________________
533 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
534 , Int_t timebin, UInt_t &index)
537 // Try to find cluster in the backup list
540 AliTRDcluster *cl =0;
541 Int_t *indexes = track->GetBackupIndexes();
543 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
544 if (indexes[i] == 0) {
547 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
551 if (cli->GetLocalTimeBin() != timebin) {
554 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
555 if (iplane == plane) {
566 //_____________________________________________________________________________
567 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
570 // Return last updated plane
574 Int_t *indexes = track->GetBackupIndexes();
576 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
577 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
581 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
582 if (iplane > lastplane) {
591 //_____________________________________________________________________________
592 Int_t AliTRDtracker::Clusters2Tracks(AliESD *event)
595 // Finds tracks within the TRD. The ESD event is expected to contain seeds
596 // at the outer part of the TRD. The seeds
597 // are found within the TRD if fAddTRDseeds is TRUE.
598 // The tracks are propagated to the innermost time bin
599 // of the TRD and the ESD event is updated
602 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
603 Float_t foundMin = fgkMinClustersInTrack * timeBins;
606 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
608 Int_t n = event->GetNumberOfTracks();
609 for (Int_t i = 0; i < n; i++) {
611 AliESDtrack *seed = event->GetTrack(i);
612 ULong_t status = seed->GetStatus();
613 if ((status & AliESDtrack::kTRDout) == 0) {
616 if ((status & AliESDtrack::kTRDin) != 0) {
621 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
622 //seed2->ResetCovariance();
623 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
624 AliTRDtrack &t = *pt;
625 FollowProlongation(t);
626 if (t.GetNumberOfClusters() >= foundMin) {
628 CookLabel(pt,1 - fgkLabelFraction);
633 Double_t xTPC = 250.0;
634 if (PropagateToX(t,xTPC,fgkMaxStep)) {
635 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
642 AliInfo(Form("Number of loaded seeds: %d",nseed));
643 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
644 AliInfo(Form("Total number of found tracks: %d",found));
650 //_____________________________________________________________________________
651 Int_t AliTRDtracker::PropagateBack(AliESD *event)
654 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
655 // backpropagated by the TPC tracker. Each seed is first propagated
656 // to the TRD, and then its prolongation is searched in the TRD.
657 // If sufficiently long continuation of the track is found in the TRD
658 // the track is updated, otherwise it's stored as originaly defined
659 // by the TPC tracker.
662 Int_t found = 0; // number of tracks found
663 Float_t foundMin = 20.0;
664 Int_t n = event->GetNumberOfTracks();
667 Float_t *quality = new Float_t[n];
668 Int_t *index = new Int_t[n];
669 for (Int_t i = 0; i < n; i++) {
670 AliESDtrack *seed = event->GetTrack(i);
671 Double_t covariance[15];
672 seed->GetExternalCovariance(covariance);
673 quality[i] = covariance[0]+covariance[2];
674 //quality[i] = covariance[0];
676 TMath::Sort(n,quality,index,kFALSE);
678 for (Int_t i = 0; i < n; i++) {
680 //AliESDtrack *seed = event->GetTrack(i);
681 AliESDtrack *seed = event->GetTrack(index[i]);
684 ULong_t status = seed->GetStatus();
685 if ((status & AliESDtrack::kTPCout) == 0) {
690 if ((status & AliESDtrack::kTRDout) != 0) {
695 Int_t lbl = seed->GetLabel();
696 AliTRDtrack *track = new AliTRDtrack(*seed);
697 track->SetSeedLabel(lbl);
698 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
700 Float_t p4 = track->GetC();
701 Int_t expectedClr = FollowBackProlongation(*track);
704 fHX->Fill(track->GetX());
707 // store the last measurement
709 fHNClTrack->Fill(track->GetNumberOfClusters());
710 if (track->GetNumberOfClusters() >= foundMin) {
714 CookdEdxTimBin(*track);
715 CookLabel(track,1 - fgkLabelFraction);
716 if (track->GetBackupTrack()) {
717 //fHBackfit->Fill(5);
718 UseClusters(track->GetBackupTrack());
719 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
725 // inter-tracks competition ???
726 if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
727 (TMath::Abs(track->GetPt()) > 0.8)) {
732 // Make backup for back propagation
735 Int_t foundClr = track->GetNumberOfClusters();
736 if (foundClr >= foundMin) {
738 CookdEdxTimBin(*track);
739 CookLabel(track,1 - fgkLabelFraction);
740 if (track->GetBackupTrack()) {
741 UseClusters(track->GetBackupTrack());
744 // Sign only gold tracks
745 if (track->GetChi2() / track->GetNumberOfClusters() < 4) {
746 if ((seed->GetKinkIndex(0) == 0) &&
747 (TMath::Abs(track->GetPt()) < 1.5)) {
751 Bool_t isGold = kFALSE;
754 if (track->GetChi2() / track->GetNumberOfClusters() < 5) {
755 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
756 if (track->GetBackupTrack()) {
757 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
766 (track->GetNCross() == 0) &&
767 (track->GetChi2() / track->GetNumberOfClusters() < 7)) {
768 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
769 if (track->GetBackupTrack()) {
770 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
776 (track->GetBackupTrack())) {
777 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
778 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
779 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
784 if ((track->StatusForTOF() > 0) &&
785 (track->GetNCross() == 0) &&
786 (Float_t(track->GetNumberOfClusters()) / Float_t(track->GetNExpected()) > 0.4)) {
787 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
795 // Debug part of tracking
796 TTreeSRedirector &cstream = *fDebugStreamer;
797 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.
798 if (AliTRDReconstructor::StreamLevel() > 0) {
799 if (track->GetBackupTrack()) {
801 << "EventNrInFile=" << eventNrInFile
804 << "trdback.=" << track->GetBackupTrack()
809 << "EventNrInFile=" << eventNrInFile
812 << "trdback.=" << track
818 // Propagation to the TOF (I.Belikov)
819 if (track->GetStop() == kFALSE) {
822 Double_t xtof = 371.0;
823 Double_t xTOF0 = 370.0;
825 Double_t c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
826 if (TMath::Abs(c2) >= 0.99) {
833 PropagateToX(*track,xTOF0,fgkMaxStep);
835 // Energy losses taken to the account - check one more time
836 c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
837 if (TMath::Abs(c2) >= 0.99) {
844 //if (!PropagateToX(*track,xTOF0,fgkMaxStep)) {
845 // fHBackfit->Fill(7);
850 Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
852 track->GetYAt(xtof,GetBz(),y);
854 if (!track->Rotate( AliTRDgeometry::GetAlpha())) {
860 else if (y < -ymax) {
861 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
868 if (track->PropagateTo(xtof)) {
869 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
872 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
873 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
874 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
876 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
878 //seed->SetTRDtrack(new AliTRDtrack(*track));
879 if (track->GetNumberOfClusters() > foundMin) {
890 if ((track->GetNumberOfClusters() > 15) &&
891 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
893 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
896 //seed->SetStatus(AliESDtrack::kTRDStop);
897 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
898 for (Int_t j = 0; j <AliESDtrack::kNSlice; j++) {
899 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
901 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
903 //seed->SetTRDtrack(new AliTRDtrack(*track));
909 seed->SetTRDQuality(track->StatusForTOF());
910 seed->SetTRDBudget(track->GetBudget(0));
916 AliInfo(Form("Number of seeds: %d",fNseeds));
917 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
920 if (AliTRDReconstructor::SeedingOn()) {
921 MakeSeedsMI(3,5,event);
935 //_____________________________________________________________________________
936 Int_t AliTRDtracker::RefitInward(AliESD *event)
939 // Refits tracks within the TRD. The ESD event is expected to contain seeds
940 // at the outer part of the TRD.
941 // The tracks are propagated to the innermost time bin
942 // of the TRD and the ESD event is updated
943 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
946 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
947 Float_t foundMin = fgkMinClustersInTrack * timeBins;
950 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
953 Int_t n = event->GetNumberOfTracks();
954 for (Int_t i = 0; i < n; i++) {
956 AliESDtrack *seed = event->GetTrack(i);
957 new (&seed2) AliTRDtrack(*seed);
960 if (seed2.GetX() < 270.0) {
961 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
966 ULong_t status = seed->GetStatus();
967 if ((status & AliESDtrack::kTRDout) == 0) {
971 if ((status & AliESDtrack::kTRDin) != 0) {
979 seed2.ResetCovariance(50.0);
981 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
982 Int_t *indexes2 = seed2.GetIndexes();
983 for (Int_t i = 0; i < AliESDtrack::kNPlane;i++) {
984 for (Int_t j = 0; j < AliESDtrack::kNSlice;j++) {
985 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
987 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
990 Int_t *indexes3 = pt->GetBackupIndexes();
991 for (Int_t i = 0; i < 200;i++) {
992 if (indexes2[i] == 0) {
995 indexes3[i] = indexes2[i];
998 //AliTRDtrack *pt = seed2;
999 AliTRDtrack &t = *pt;
1000 FollowProlongation(t);
1001 if (t.GetNumberOfClusters() >= foundMin) {
1003 //CookLabel(pt, 1-fgkLabelFraction);
1009 Double_t xTPC = 250.0;
1010 if (PropagateToX(t,xTPC,fgkMaxStep)) {
1012 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
1015 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1016 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1017 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
1019 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
1023 // If not prolongation to TPC - propagate without update
1025 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
1026 seed2->ResetCovariance(5.0);
1027 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1029 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
1031 CookdEdxTimBin(*pt2);
1032 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
1035 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
1036 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
1037 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
1039 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
1049 AliInfo(Form("Number of loaded seeds: %d",nseed));
1050 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
1056 //_____________________________________________________________________________
1057 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
1060 // Starting from current position on track=t this function tries
1061 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1062 // if a close cluster is found. Returns the number of clusters
1063 // expected to be found in sensitive layers
1064 // GeoManager used to estimate mean density
1068 Int_t lastplane = GetLastPlane(&t);
1069 Double_t radLength = 0.0;
1071 Int_t expectedNumberOfClusters = 0;
1073 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
1075 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1076 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1079 // Propagate track close to the plane if neccessary
1081 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
1082 if (currentx < (-fgkMaxStep + t.GetX())) {
1083 // Propagate closer to chamber - safety space fgkMaxStep
1084 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
1089 if (!AdjustSector(&t)) {
1094 // Get material budget
1103 // Starting global position
1105 // End global position
1106 x = fTrSec[0]->GetLayer(row0)->GetX();
1107 if (!t.GetProlongation(x,y,z)) {
1110 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1111 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1113 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1115 radLength = param[1]; // Get mean propagation parameters
1118 // Propagate and update
1120 sector = t.GetSector();
1121 //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
1122 for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
1124 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
1125 expectedNumberOfClusters++;
1126 t.SetNExpected(t.GetNExpected() + 1);
1127 if (t.GetX() > 345.0) {
1128 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1130 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1131 AliTRDcluster *cl = 0;
1133 Double_t maxChi2 = fgkMaxChi2;
1138 AliTRDcluster *cl0 = timeBin[0];
1140 // No clusters in given time bin
1144 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1145 if (plane > lastplane) {
1149 Int_t timebin = cl0->GetLocalTimeBin();
1150 AliTRDcluster *cl2 = GetCluster(&t,plane,timebin,index);
1155 //Double_t h01 = GetTiltFactor(cl); //I.B's fix
1156 //maxChi2=t.GetPredictedChi2(cl,h01);
1161 //if (cl->GetNPads()<5)
1162 Double_t dxsample = timeBin.GetdX();
1163 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1164 Double_t h01 = GetTiltFactor(cl);
1165 Int_t det = cl->GetDetector();
1166 Int_t plane = fGeom->GetPlane(det);
1167 if (t.GetX() > 345.0) {
1168 t.SetNLast(t.GetNLast() + 1);
1169 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1172 Double_t xcluster = cl->GetX();
1173 t.PropagateTo(xcluster,radLength,rho);
1175 if (!AdjustSector(&t)) {
1178 maxChi2 = t.GetPredictedChi2(cl,h01);
1181 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1193 return expectedNumberOfClusters;
1197 //_____________________________________________________________________________
1198 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
1201 // Starting from current radial position of track <t> this function
1202 // extrapolates the track up to outer timebin and in the sensitive
1203 // layers confirms prolongation if a close cluster is found.
1204 // Returns the number of clusters expected to be found in sensitive layers
1205 // Use GEO manager for material Description
1207 // return number of assigned clusters ?
1212 Int_t clusters[1000];
1213 Double_t radLength = 0.0;
1215 Int_t expectedNumberOfClusters = 0;
1216 Float_t ratio0 = 0.0;
1217 AliTRDtracklet tracklet;
1219 // Calibration fill 2D
1220 AliTRDCalibra *calibra = AliTRDCalibra::Instance();
1222 AliInfo("Could not get Calibra instance\n");
1224 if (calibra->GetMITracking()) {
1225 calibra->ResetTrack();
1228 for (Int_t i = 0; i < 1000; i++) {
1232 for (Int_t iplane = 0; iplane < AliESDtrack::kNPlane; iplane++) {
1234 int hb = iplane * 10;
1235 fHClSearch->Fill(hb);
1237 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1238 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1239 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1240 if (currentx < t.GetX()) {
1241 fHClSearch->Fill(hb+1);
1246 // Propagate closer to chamber if neccessary
1248 if (currentx > (fgkMaxStep + t.GetX())) {
1249 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
1250 fHClSearch->Fill(hb+2);
1254 if (!AdjustSector(&t)) {
1255 fHClSearch->Fill(hb+3);
1258 if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
1259 fHClSearch->Fill(hb+4);
1264 // Get material budget inside of chamber
1272 // Starting global position
1274 // End global position
1275 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1276 if (!t.GetProlongation(x,y,z)) {
1277 fHClSearch->Fill(hb+5);
1280 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1281 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1283 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1285 radLength = param[1]; // Get mean propagation parameters
1290 sector = t.GetSector();
1291 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1292 fHNCl->Fill(tracklet.GetN());
1294 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
1295 fHClSearch->Fill(hb+6);
1300 // Propagate and update track
1302 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1304 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1305 expectedNumberOfClusters++;
1306 t.SetNExpected(t.GetNExpected() + 1);
1307 if (t.GetX() > 345.0) {
1308 t.SetNExpectedLast(t.GetNExpectedLast() + 1);
1310 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1311 AliTRDcluster *cl = 0;
1313 Double_t maxChi2 = fgkMaxChi2;
1318 if (clusters[ilayer] > 0) {
1319 index = clusters[ilayer];
1320 cl = (AliTRDcluster *)GetCluster(index);
1321 //Double_t h01 = GetTiltFactor(cl); // I.B's fix
1322 //maxChi2=t.GetPredictedChi2(cl,h01); //
1327 //if (cl->GetNPads() < 5)
1328 Double_t dxsample = timeBin.GetdX();
1329 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1330 Double_t h01 = GetTiltFactor(cl);
1331 Int_t det = cl->GetDetector();
1332 Int_t plane = fGeom->GetPlane(det);
1333 if (t.GetX() > 345.0) {
1334 t.SetNLast(t.GetNLast() + 1);
1335 t.SetChi2Last(t.GetChi2Last() + maxChi2);
1337 Double_t xcluster = cl->GetX();
1338 t.PropagateTo(xcluster,radLength,rho);
1339 maxChi2 = t.GetPredictedChi2(cl,h01);
1342 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1343 if (!t.Update(cl,maxChi2,index,h01)) {
1348 if (calibra->GetMITracking()) {
1349 calibra->UpdateHistograms(cl,&t);
1352 // Reset material budget if 2 consecutive gold
1354 if ((t.GetTracklets(plane).GetN() + t.GetTracklets(plane-1).GetN()) > 20) {
1365 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1366 Float_t ratio1 = Float_t(t.GetNumberOfClusters()+1) / Float_t(t.GetNExpected()+1);
1367 if ((tracklet.GetChi2() < 18.0) &&
1370 (ratio0+ratio1 > 1.5) &&
1371 (t.GetNCross() == 0) &&
1372 (TMath::Abs(t.GetSnp()) < 0.85) &&
1373 (t.GetNumberOfClusters() > 20)){
1374 //if (ratio0 > 0.8) {
1375 t.MakeBackupTrack(); // Make backup of the track until is gold
1380 return expectedNumberOfClusters;
1383 //_____________________________________________________________________________
1384 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1387 // Starting from current radial position of track <t> this function
1388 // extrapolates the track up to radial position <xToGo>.
1389 // Returns 1 if track reaches the plane, and 0 otherwise
1392 const Double_t kEpsilon = 0.00001;
1393 //Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1394 Double_t xpos = t.GetX();
1395 Double_t dir = (xpos<xToGo) ? 1.0 : -1.0;
1397 while (((xToGo-xpos)*dir) > kEpsilon) {
1399 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1407 // Starting global position
1411 if (!t.GetProlongation(x,y,z)) {
1412 return 0; // No prolongation
1415 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1416 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1419 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1420 if (!t.PropagateTo(x,param[1],param[0])) {
1432 //_____________________________________________________________________________
1433 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1436 // Fills clusters into TRD tracking_sectors
1437 // Note that the numbering scheme for the TRD tracking_sectors
1438 // differs from that of TRD sectors
1441 if (ReadClusters(fClusters,cTree)) {
1442 AliError("Problem with reading the clusters !");
1445 Int_t ncl = fClusters->GetEntriesFast();
1447 AliInfo(Form("Sorting %d clusters",ncl));
1450 for (Int_t ichamber = 0; ichamber < 5; ichamber++) {
1451 for (Int_t isector = 0; isector < 18; isector++) {
1452 fHoles[ichamber][isector] = kTRUE;
1458 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1459 Int_t detector = c->GetDetector();
1460 Int_t localTimeBin = c->GetLocalTimeBin();
1461 Int_t sector = fGeom->GetSector(detector);
1462 Int_t plane = fGeom->GetPlane(detector);
1463 Int_t trackingSector = sector;
1465 //if (c->GetLabel(0) > 0) {
1466 if (c->GetQ() > 10) {
1467 Int_t chamber = fGeom->GetChamber(detector);
1468 fHoles[chamber][trackingSector] = kFALSE;
1471 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1475 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1479 // Apply pos correction
1481 fHXCl->Fill(c->GetX());
1483 fTrSec[trackingSector]->GetLayer(layer)->SetX(c->GetX());
1484 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1491 //_____________________________________________________________________________
1492 void AliTRDtracker::UnloadClusters()
1495 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1501 nentr = fClusters->GetEntriesFast();
1502 for (i = 0; i < nentr; i++) {
1503 delete fClusters->RemoveAt(i);
1507 nentr = fSeeds->GetEntriesFast();
1508 for (i = 0; i < nentr; i++) {
1509 delete fSeeds->RemoveAt(i);
1512 nentr = fTracks->GetEntriesFast();
1513 for (i = 0; i < nentr; i++) {
1514 delete fTracks->RemoveAt(i);
1517 Int_t nsec = AliTRDgeometry::kNsect;
1518 for (i = 0; i < nsec; i++) {
1519 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1520 fTrSec[i]->GetLayer(pl)->Clear();
1526 //_____________________________________________________________________________
1527 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD *esd)
1530 // Creates seeds using clusters between position inner plane and outer plane
1533 const Double_t kMaxTheta = 1.0;
1534 const Double_t kMaxPhi = 2.0;
1536 const Double_t kRoad0y = 6.0; // Road for middle cluster
1537 const Double_t kRoad0z = 8.5; // Road for middle cluster
1539 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1540 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1542 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1543 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1544 const Int_t kMaxSeed = 3000;
1546 Int_t maxSec = AliTRDgeometry::kNsect;
1548 // Linear fitters in planes
1549 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1550 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1551 fitterTC.StoreData(kTRUE);
1552 fitterT2.StoreData(kTRUE);
1553 AliRieman rieman(1000); // Rieman fitter
1554 AliRieman rieman2(1000); // Rieman fitter
1556 // Find the maximal and minimal layer for the planes
1558 AliTRDpropagationLayer *reflayers[6];
1559 for (Int_t i = 0; i < 6; i++) {
1560 layers[i][0] = 10000;
1563 for (Int_t ns = 0; ns < maxSec; ns++) {
1564 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1565 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(ilayer));
1569 Int_t det = layer[0]->GetDetector();
1570 Int_t plane = fGeom->GetPlane(det);
1571 if (ilayer < layers[plane][0]) {
1572 layers[plane][0] = ilayer;
1574 if (ilayer > layers[plane][1]) {
1575 layers[plane][1] = ilayer;
1580 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1581 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1582 Double_t hL[6]; // Tilting angle
1583 Double_t xcl[6]; // X - position of reference cluster
1584 Double_t ycl[6]; // Y - position of reference cluster
1585 Double_t zcl[6]; // Z - position of reference cluster
1587 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1588 Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
1590 Double_t chi2R = 0.0;
1591 Double_t chi2Z = 0.0;
1592 Double_t chi2RF = 0.0;
1593 Double_t chi2ZF = 0.0;
1595 Int_t nclusters; // Total number of clusters
1596 for (Int_t i = 0; i < 6; i++) {
1604 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1605 AliTRDseed *seed[kMaxSeed];
1606 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1607 seed[iseed]= &pseed[iseed*6];
1609 AliTRDseed *cseed = seed[0];
1611 Double_t seedquality[kMaxSeed];
1612 Double_t seedquality2[kMaxSeed];
1613 Double_t seedparams[kMaxSeed][7];
1614 Int_t seedlayer[kMaxSeed];
1615 Int_t registered = 0;
1616 Int_t sort[kMaxSeed];
1621 for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
1622 //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
1624 registered = 0; // Reset registerd seed counter
1625 cseed = seed[registered];
1628 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1629 //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
1632 Int_t dseed = 5 + Int_t(iter) * 3;
1634 // Initialize seeding layers
1635 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1636 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1637 xcl[ilayer] = reflayers[ilayer]->GetX();
1640 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1641 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1642 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1643 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1644 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1646 Int_t maxn3 = layer3;
1647 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1649 AliTRDcluster *cl3 = layer3[icl3];
1653 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
1654 ycl[sLayer+3] = cl3->GetY();
1655 zcl[sLayer+3] = cl3->GetZ();
1656 Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1657 Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1658 Int_t maxn0 = layer0;
1660 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1662 AliTRDcluster *cl0 = layer0[icl0];
1666 if (cl3->IsUsed() && cl0->IsUsed()) {
1669 ycl[sLayer+0] = cl0->GetY();
1670 zcl[sLayer+0] = cl0->GetZ();
1671 if (ycl[sLayer+0] > yymax0) {
1674 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1675 if (TMath::Abs(tanphi) > kMaxPhi) {
1678 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1679 if (TMath::Abs(tantheta) > kMaxTheta) {
1682 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
1684 // Expected position in 1 layer
1685 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
1686 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
1687 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1688 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1689 Int_t maxn1 = layer1;
1691 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1693 AliTRDcluster *cl1 = layer1[icl1];
1698 if (cl3->IsUsed()) nusedCl++;
1699 if (cl0->IsUsed()) nusedCl++;
1700 if (cl1->IsUsed()) nusedCl++;
1704 ycl[sLayer+1] = cl1->GetY();
1705 zcl[sLayer+1] = cl1->GetZ();
1706 if (ycl[sLayer+1] > yymax1) {
1709 if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
1712 if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
1715 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
1717 Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
1718 Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
1719 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1723 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1724 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
1725 ycl[sLayer+2] = cl2->GetY();
1726 zcl[sLayer+2] = cl2->GetZ();
1727 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
1732 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1733 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1734 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1735 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1739 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1740 cseed[iLayer].Reset();
1745 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1746 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1747 chi2Z += (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer])
1748 * (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer]);
1749 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1750 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1751 chi2R += (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer])
1752 * (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer]);
1753 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1755 if (TMath::Sqrt(chi2R) > 1.0/iter) {
1758 if (TMath::Sqrt(chi2Z) > 7.0/iter) {
1762 Float_t minmax[2] = { -100.0, 100.0 };
1763 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1764 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
1765 + 1.0 - cseed[sLayer+iLayer].GetZref(0);
1766 if (max < minmax[1]) {
1769 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
1770 - 1.0 - cseed[sLayer+iLayer].GetZref(0);
1771 if (min > minmax[0]) {
1776 Bool_t isFake = kFALSE;
1777 if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
1780 if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
1783 if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
1787 if (AliTRDReconstructor::StreamLevel() > 0) {
1788 if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
1789 TTreeSRedirector &cstream = *fDebugStreamer;
1791 << "isFake=" << isFake
1797 << "X0=" << xcl[sLayer+0]
1798 << "X1=" << xcl[sLayer+1]
1799 << "X2=" << xcl[sLayer+2]
1800 << "X3=" << xcl[sLayer+3]
1801 << "Y2exp=" << y2exp
1802 << "Z2exp=" << z2exp
1803 << "Chi2R=" << chi2R
1804 << "Chi2Z=" << chi2Z
1805 << "Seed0.=" << &cseed[sLayer+0]
1806 << "Seed1.=" << &cseed[sLayer+1]
1807 << "Seed2.=" << &cseed[sLayer+2]
1808 << "Seed3.=" << &cseed[sLayer+3]
1809 << "Zmin=" << minmax[0]
1810 << "Zmax=" << minmax[1]
1815 ////////////////////////////////////////////////////////////////////////////////////
1819 ////////////////////////////////////////////////////////////////////////////////////
1825 Bool_t isOK = kTRUE;
1827 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1829 cseed[sLayer+jLayer].SetTilt(hL[sLayer+jLayer]);
1830 cseed[sLayer+jLayer].SetPadLength(padlength[sLayer+jLayer]);
1831 cseed[sLayer+jLayer].SetX0(xcl[sLayer+jLayer]);
1833 for (Int_t iter = 0; iter < 2; iter++) {
1836 // In iteration 0 we try only one pad-row
1837 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1839 AliTRDseed tseed = cseed[sLayer+jLayer];
1840 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1842 roadz = padlength[sLayer+jLayer];
1845 Float_t quality = 10000.0;
1847 for (Int_t iTime = 2; iTime < 20; iTime++) {
1849 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1850 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1851 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1854 // Try 2 pad-rows in second iteration
1855 zexp = tseed.GetZref(0) + tseed.GetZref(1) * dxlayer;
1856 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1857 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
1859 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1860 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
1864 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1865 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1869 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1871 tseed.SetIndexes(iTime,index);
1872 tseed.SetClusters(iTime,cl); // Register cluster
1873 tseed.SetX(iTime,dxlayer); // Register cluster
1874 tseed.SetY(iTime,cl->GetY()); // Register cluster
1875 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1881 // Count the number of clusters and distortions into quality
1882 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1883 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1884 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1885 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1886 if ((iter == 0) && tseed.IsOK()) {
1887 cseed[sLayer+jLayer] = tseed;
1893 if (tseed.IsOK() && (tquality < quality)) {
1894 cseed[sLayer+jLayer] = tseed;
1899 if (!cseed[sLayer+jLayer].IsOK()) {
1904 cseed[sLayer+jLayer].CookLabels();
1905 cseed[sLayer+jLayer].UpdateUsed();
1906 nusedCl += cseed[sLayer+jLayer].GetNUsed();
1918 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1919 if (cseed[sLayer+iLayer].IsOK()) {
1920 nclusters += cseed[sLayer+iLayer].GetN2();
1926 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1927 rieman.AddPoint(xcl[sLayer+iLayer]
1928 ,cseed[sLayer+iLayer].GetYfitR(0)
1929 ,cseed[sLayer+iLayer].GetZProb()
1938 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1939 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1940 chi2R += (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0))
1941 * (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0));
1942 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1943 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1944 chi2Z += (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz())
1945 * (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz());
1946 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1948 Double_t curv = rieman.GetC();
1953 Double_t sumda = TMath::Abs(cseed[sLayer+0].GetYfitR(1) - cseed[sLayer+0].GetYref(1))
1954 + TMath::Abs(cseed[sLayer+1].GetYfitR(1) - cseed[sLayer+1].GetYref(1))
1955 + TMath::Abs(cseed[sLayer+2].GetYfitR(1) - cseed[sLayer+2].GetYref(1))
1956 + TMath::Abs(cseed[sLayer+3].GetYfitR(1) - cseed[sLayer+3].GetYref(1));
1957 Double_t likea = TMath::Exp(-sumda*10.6);
1958 Double_t likechi2 = 0.0000000001;
1960 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1962 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1963 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1964 Double_t like = likea * likechi2 * likechi2z * likeN;
1965 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetYref(1) - 130.0*curv) * 1.9);
1966 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetZref(1)
1967 - cseed[sLayer+0].GetZref(0) / xcl[sLayer+0]) * 5.9);
1968 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1970 seedquality[registered] = like;
1971 seedlayer[registered] = sLayer;
1972 if (TMath::Log(0.000000000000001 + like) < -15) {
1975 AliTRDseed seedb[6];
1976 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1977 seedb[iLayer] = cseed[iLayer];
1980 ////////////////////////////////////////////////////////////////////////////////////
1982 // Full track fit part
1984 ////////////////////////////////////////////////////////////////////////////////////
1991 // Add new layers - avoid long extrapolation
1993 Int_t tLayer[2] = { 0, 0 };
2007 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2008 Int_t jLayer = tLayer[iLayer]; // Set tracking layer
2009 cseed[jLayer].Reset();
2010 cseed[jLayer].SetTilt(hL[jLayer]);
2011 cseed[jLayer].SetPadLength(padlength[jLayer]);
2012 cseed[jLayer].SetX0(xcl[jLayer]);
2013 // Get pad length and rough cluster
2014 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].GetYref(0)
2015 ,cseed[jLayer].GetZref(0)
2018 if (indexdummy <= 0) {
2021 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
2022 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
2024 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2026 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
2028 Int_t jLayer = tLayer[iLayer]; // set tracking layer
2029 if ((jLayer == 0) && !(cseed[1].IsOK())) {
2030 continue; // break not allowed
2032 if ((jLayer == 5) && !(cseed[4].IsOK())) {
2033 continue; // break not allowed
2035 Float_t zexp = cseed[jLayer].GetZref(0);
2036 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
2038 for (Int_t iter = 0; iter < 2; iter++) {
2040 AliTRDseed tseed = cseed[jLayer];
2041 Float_t quality = 10000.0;
2043 for (Int_t iTime = 2; iTime < 20; iTime++) {
2044 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
2045 Double_t dxlayer = layer.GetX()-xcl[jLayer];
2046 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
2047 Float_t yroad = kRoad1y;
2048 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
2052 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2053 tseed.SetIndexes(iTime,index);
2054 tseed.SetClusters(iTime,cl); // Register cluster
2055 tseed.SetX(iTime,dxlayer); // Register cluster
2056 tseed.SetY(iTime,cl->GetY()); // Register cluster
2057 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2062 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2063 Float_t tquality = (18.0 - tseed.GetN2())/2.0 + TMath::Abs(dangle) / 0.1
2064 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
2065 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2066 if (tquality < quality) {
2067 cseed[jLayer] = tseed;
2076 if ( cseed[jLayer].IsOK()) {
2077 cseed[jLayer].CookLabels();
2078 cseed[jLayer].UpdateUsed();
2079 nusedf += cseed[jLayer].GetNUsed();
2080 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2086 AliTRDseed bseed[6];
2087 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2088 bseed[jLayer] = cseed[jLayer];
2090 Float_t lastquality = 10000.0;
2091 Float_t lastchi2 = 10000.0;
2092 Float_t chi2 = 1000.0;
2094 for (Int_t iter = 0; iter < 4; iter++) {
2096 // Sort tracklets according "quality", try to "improve" 4 worst
2097 Float_t sumquality = 0.0;
2098 Float_t squality[6];
2099 Int_t sortindexes[6];
2101 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2102 if (bseed[jLayer].IsOK()) {
2103 AliTRDseed &tseed = bseed[jLayer];
2104 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2105 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2106 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
2107 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2108 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2109 squality[jLayer] = tquality;
2112 squality[jLayer] = -1.0;
2114 sumquality +=squality[jLayer];
2117 if ((sumquality >= lastquality) ||
2118 (chi2 > lastchi2)) {
2121 lastquality = sumquality;
2124 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2125 cseed[jLayer] = bseed[jLayer];
2128 TMath::Sort(6,squality,sortindexes,kFALSE);
2130 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
2132 Int_t bLayer = sortindexes[jLayer];
2133 AliTRDseed tseed = bseed[bLayer];
2135 for (Int_t iTime = 2; iTime < 20; iTime++) {
2137 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
2138 Double_t dxlayer = layer.GetX() - xcl[bLayer];
2139 Double_t zexp = tseed.GetZref(0);
2140 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2141 Float_t roadz = padlength[bLayer] + 1;
2142 if (TMath::Abs(tseed.GetZProb() - zexp) > 0.5*padlength[bLayer]) {
2143 roadz = padlength[bLayer] * 0.5;
2145 if (tseed.GetZfit(1)*tseed.GetZref(1) < 0.0) {
2146 roadz = padlength[bLayer] * 0.5;
2148 if (TMath::Abs(tseed.GetZProb() - zexp) < 0.1*padlength[bLayer]) {
2149 zexp = tseed.GetZProb();
2150 roadz = padlength[bLayer] * 0.5;
2153 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer - zcor;
2154 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
2158 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2160 tseed.SetIndexes(iTime,index);
2161 tseed.SetClusters(iTime,cl); // Register cluster
2162 tseed.SetX(iTime,dxlayer); // Register cluster
2163 tseed.SetY(iTime,cl->GetY()); // Register cluster
2164 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2170 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2171 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2172 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0
2173 + TMath::Abs(dangle) / 0.1
2174 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2175 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2176 if (tquality<squality[bLayer]) {
2177 bseed[bLayer] = tseed;
2183 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
2190 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2191 if (TMath::Abs(cseed[iLayer].GetYref(0) / cseed[iLayer].GetX0()) < 0.15) {
2194 if (cseed[iLayer].IsOK()) {
2195 nclusters += cseed[iLayer].GetN2();
2203 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2204 if (cseed[iLayer].IsOK()) {
2205 rieman.AddPoint(xcl[iLayer]
2206 ,cseed[iLayer].GetYfitR(0)
2207 ,cseed[iLayer].GetZProb()
2216 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2217 if (cseed[iLayer].IsOK()) {
2218 cseed[iLayer].SetYref(0,rieman.GetYat(xcl[iLayer]));
2219 chi2RF += (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0))
2220 * (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0));
2221 cseed[iLayer].SetYref(1,rieman.GetDYat(xcl[iLayer]));
2222 cseed[iLayer].SetZref(0,rieman.GetZat(xcl[iLayer]));
2223 chi2ZF += (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz())
2224 * (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz());
2225 cseed[iLayer].SetZref(1,rieman.GetDZat(xcl[iLayer]));
2228 chi2RF /= TMath::Max((nlayers - 3.0),1.0);
2229 chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
2230 curv = rieman.GetC();
2232 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
2233 Double_t dzmf = rieman.GetDZat(xref2);
2234 Double_t zmf = rieman.GetZat(xref2);
2240 fitterTC.ClearPoints();
2241 fitterT2.ClearPoints();
2244 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2246 if (!cseed[iLayer].IsOK()) {
2250 for (Int_t itime = 0; itime < 25; itime++) {
2252 if (!cseed[iLayer].IsUsable(itime)) {
2255 // X relative to the middle chamber
2256 Double_t x = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0() - xref2;
2257 Double_t y = cseed[iLayer].GetY(itime);
2258 Double_t z = cseed[iLayer].GetZ(itime);
2259 // ExB correction to the correction
2263 Double_t x2 = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0();
2264 Double_t t = 1.0 / (x2*x2 + y*y);
2266 uvt[0] = 2.0 * x2 * uvt[1]; // u
2267 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
2268 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
2269 uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
2270 Double_t error = 2.0 * 0.2 * uvt[1];
2271 fitterT2.AddPoint(uvt,uvt[4],error);
2274 // Constrained rieman
2276 z = cseed[iLayer].GetZ(itime);
2277 uvt[0] = 2.0 * x2 * t; // u
2278 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
2279 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
2280 fitterTC.AddPoint(uvt,uvt[2],error);
2281 rieman2.AddPoint(x2,y,z,1,10);
2291 Double_t rpolz0 = fitterT2.GetParameter(3);
2292 Double_t rpolz1 = fitterT2.GetParameter(4);
2295 // Linear fitter - not possible to make boundaries
2296 // Do not accept non possible z and dzdx combinations
2298 Bool_t acceptablez = kTRUE;
2299 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2300 if (cseed[iLayer].IsOK()) {
2301 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2302 if (TMath::Abs(cseed[iLayer].GetZProb() - zT2) > padlength[iLayer] * 0.5 + 1.0) {
2303 acceptablez = kFALSE;
2308 fitterT2.FixParameter(3,zmf);
2309 fitterT2.FixParameter(4,dzmf);
2311 fitterT2.ReleaseParameter(3);
2312 fitterT2.ReleaseParameter(4);
2313 rpolz0 = fitterT2.GetParameter(3);
2314 rpolz1 = fitterT2.GetParameter(4);
2317 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2318 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2319 Double_t polz1c = fitterTC.GetParameter(2);
2320 Double_t polz0c = polz1c * xref2;
2321 Double_t aC = fitterTC.GetParameter(0);
2322 Double_t bC = fitterTC.GetParameter(1);
2323 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2324 Double_t aR = fitterT2.GetParameter(0);
2325 Double_t bR = fitterT2.GetParameter(1);
2326 Double_t dR = fitterT2.GetParameter(2);
2327 Double_t cR = 1.0 + bR*bR - dR*aR;
2330 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2331 cR = aR / TMath::Sqrt(cR);
2334 Double_t chi2ZT2 = 0.0;
2335 Double_t chi2ZTC = 0.0;
2336 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2337 if (cseed[iLayer].IsOK()) {
2338 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2339 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2340 chi2ZT2 += TMath::Abs(cseed[iLayer].GetMeanz() - zT2);
2341 chi2ZTC += TMath::Abs(cseed[iLayer].GetMeanz() - zTC);
2344 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2345 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2347 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2348 Float_t sumdaf = 0.0;
2349 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2350 if (cseed[iLayer].IsOK()) {
2351 sumdaf += TMath::Abs((cseed[iLayer].GetYfit(1) - cseed[iLayer].GetYref(1))
2352 / cseed[iLayer].GetSigmaY2());
2355 sumdaf /= Float_t (nlayers - 2.0);
2358 // Likelihoods for full track
2360 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2361 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2362 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2363 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2364 seedquality2[registered] = likezf * likechi2TR * likeaf;
2366 // Still needed ????
2367 // Bool_t isGold = kFALSE;
2369 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2370 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2371 // if (isGold &&nusedf<10){
2372 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2373 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2374 // seed[index][jLayer].UseClusters(); //sign gold
2379 if (!cseed[0].IsOK()) {
2381 if (!cseed[1].IsOK()) {
2385 seedparams[registered][0] = cseed[index0].GetX0();
2386 seedparams[registered][1] = cseed[index0].GetYref(0);
2387 seedparams[registered][2] = cseed[index0].GetZref(0);
2388 seedparams[registered][5] = cR;
2389 seedparams[registered][3] = cseed[index0].GetX0() * cR - TMath::Sin(TMath::ATan(cseed[0].GetYref(1)));
2390 seedparams[registered][4] = cseed[index0].GetZref(1)
2391 / TMath::Sqrt(1.0 + cseed[index0].GetYref(1) * cseed[index0].GetYref(1));
2392 seedparams[registered][6] = ns;
2397 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2398 if (!cseed[iLayer].IsOK()) {
2401 if (cseed[iLayer].GetLabels(0) >= 0) {
2402 labels[nlab] = cseed[iLayer].GetLabels(0);
2405 if (cseed[iLayer].GetLabels(1) >= 0) {
2406 labels[nlab] = cseed[iLayer].GetLabels(1);
2410 Freq(nlab,labels,outlab,kFALSE);
2411 Int_t label = outlab[0];
2412 Int_t frequency = outlab[1];
2413 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2414 cseed[iLayer].SetFreq(frequency);
2415 cseed[iLayer].SetC(cR);
2416 cseed[iLayer].SetCC(cC);
2417 cseed[iLayer].SetChi2(chi2TR);
2418 cseed[iLayer].SetChi2Z(chi2ZF);
2422 if (1 || (!isFake)) {
2423 Float_t zvertex = GetZ();
2424 TTreeSRedirector &cstream = *fDebugStreamer;
2425 if (AliTRDReconstructor::StreamLevel() > 0) {
2427 << "isFake=" << isFake
2428 << "Vertex=" << zvertex
2429 << "Rieman2.=" << &rieman2
2430 << "Rieman.=" << &rieman
2438 << "Chi2R=" << chi2R
2439 << "Chi2Z=" << chi2Z
2440 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2441 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2442 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2443 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2444 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2445 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2446 << "C=" << curv // Non constrained - no tilt correction
2447 << "DR=" << dR // DR parameter - tilt correction
2448 << "DCA=" << dca // DCA - tilt correction
2449 << "CR=" << cR // Non constrained curvature - tilt correction
2450 << "CC=" << cC // Constrained curvature
2451 << "Polz0=" << polz0c
2452 << "Polz1=" << polz1c
2453 << "RPolz0=" << rpolz0
2454 << "RPolz1=" << rpolz1
2455 << "Ncl=" << nclusters
2456 << "Nlayers=" << nlayers
2457 << "NUsedS=" << nusedCl
2458 << "NUsed=" << nusedf
2459 << "Findable=" << findable
2461 << "LikePrim=" << likePrim
2462 << "Likechi2C=" << likechi2C
2463 << "Likechi2TR=" << likechi2TR
2464 << "Likezf=" << likezf
2465 << "LikeF=" << seedquality2[registered]
2466 << "S0.=" << &cseed[0]
2467 << "S1.=" << &cseed[1]
2468 << "S2.=" << &cseed[2]
2469 << "S3.=" << &cseed[3]
2470 << "S4.=" << &cseed[4]
2471 << "S5.=" << &cseed[5]
2472 << "SB0.=" << &seedb[0]
2473 << "SB1.=" << &seedb[1]
2474 << "SB2.=" << &seedb[2]
2475 << "SB3.=" << &seedb[3]
2476 << "SB4.=" << &seedb[4]
2477 << "SB5.=" << &seedb[5]
2478 << "Label=" << label
2479 << "Freq=" << frequency
2480 << "sLayer=" << sLayer
2485 if (registered<kMaxSeed - 1) {
2487 cseed = seed[registered];
2490 } // End of loop over layer 1
2492 } // End of loop over layer 0
2494 } // End of loop over layer 3
2496 } // End of loop over seeding time bins
2502 TMath::Sort(registered,seedquality2,sort,kTRUE);
2503 Bool_t signedseed[kMaxSeed];
2504 for (Int_t i = 0; i < registered; i++) {
2505 signedseed[i] = kFALSE;
2508 for (Int_t iter = 0; iter < 5; iter++) {
2510 for (Int_t iseed = 0; iseed < registered; iseed++) {
2512 Int_t index = sort[iseed];
2513 if (signedseed[index]) {
2516 Int_t labelsall[1000];
2517 Int_t nlabelsall = 0;
2518 Int_t naccepted = 0;;
2519 Int_t sLayer = seedlayer[index];
2525 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2527 if (TMath::Abs(seed[index][jLayer].GetYref(0) / xcl[jLayer]) < 0.15) {
2530 if (seed[index][jLayer].IsOK()) {
2531 seed[index][jLayer].UpdateUsed();
2532 ncl +=seed[index][jLayer].GetN2();
2533 nused +=seed[index][jLayer].GetNUsed();
2536 for (Int_t itime = 0; itime < 25; itime++) {
2537 if (seed[index][jLayer].IsUsable(itime)) {
2539 for (Int_t ilab = 0; ilab < 3; ilab++) {
2540 Int_t tindex = seed[index][jLayer].GetClusters(itime)->GetLabel(ilab);
2542 labelsall[nlabelsall] = tindex;
2560 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2566 if (nlayers < findable) {
2569 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
2575 if ((nlayers == findable) ||
2579 if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
2585 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2591 if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
2596 signedseed[index] = kTRUE;
2601 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2602 if (seed[index][iLayer].IsOK()) {
2603 if (seed[index][iLayer].GetLabels(0) >= 0) {
2604 labels[nlab] = seed[index][iLayer].GetLabels(0);
2607 if (seed[index][iLayer].GetLabels(1) >= 0) {
2608 labels[nlab] = seed[index][iLayer].GetLabels(1);
2613 Freq(nlab,labels,outlab,kFALSE);
2614 Int_t label = outlab[0];
2615 Int_t frequency = outlab[1];
2616 Freq(nlabelsall,labelsall,outlab,kFALSE);
2617 Int_t label1 = outlab[0];
2618 Int_t label2 = outlab[2];
2619 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2620 Float_t ratio = Float_t(nused) / Float_t(ncl);
2622 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2623 if ((seed[index][jLayer].IsOK()) &&
2624 (TMath::Abs(seed[index][jLayer].GetYfit(1) - seed[index][jLayer].GetYfit(1)) < 0.2)) {
2625 seed[index][jLayer].UseClusters(); // Sign gold
2630 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.
2631 TTreeSRedirector &cstream = *fDebugStreamer;
2636 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2642 AliESDtrack esdtrack;
2643 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2644 esdtrack.SetLabel(label);
2645 esd->AddTrack(&esdtrack);
2646 TTreeSRedirector &cstream = *fDebugStreamer;
2647 if (AliTRDReconstructor::StreamLevel() > 0) {
2649 << "EventNrInFile=" << eventNrInFile
2650 << "ESD.=" << &esdtrack
2652 << "trdback.=" << track
2657 if (AliTRDReconstructor::StreamLevel() > 0) {
2660 << "Track.=" << track
2661 << "Like=" << seedquality[index]
2662 << "LikeF=" << seedquality2[index]
2663 << "S0.=" << &seed[index][0]
2664 << "S1.=" << &seed[index][1]
2665 << "S2.=" << &seed[index][2]
2666 << "S3.=" << &seed[index][3]
2667 << "S4.=" << &seed[index][4]
2668 << "S5.=" << &seed[index][5]
2669 << "Label=" << label
2670 << "Label1=" << label1
2671 << "Label2=" << label2
2672 << "FakeRatio=" << fakeratio
2673 << "Freq=" << frequency
2675 << "Nlayers=" << nlayers
2676 << "Findable=" << findable
2677 << "NUsed=" << nused
2678 << "sLayer=" << sLayer
2679 << "EventNrInFile=" << eventNrInFile
2687 } // End of loop over sectors
2693 //_____________________________________________________________________________
2694 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *clusterTree) const
2697 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2698 // from the file. The names of the cluster tree and branches
2699 // should match the ones used in AliTRDclusterizer::WriteClusters()
2702 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2703 TObjArray *clusterArray = new TObjArray(nsize+1000);
2705 TBranch *branch = clusterTree->GetBranch("TRDcluster");
2707 AliError("Can't get the branch !");
2710 branch->SetAddress(&clusterArray);
2712 // Loop through all entries in the tree
2713 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2715 AliTRDcluster *c = 0;
2716 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2719 nbytes += clusterTree->GetEvent(iEntry);
2721 // Get the number of points in the detector
2722 Int_t nCluster = clusterArray->GetEntriesFast();
2724 // Loop through all TRD digits
2725 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2726 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2727 AliTRDcluster *co = c;
2729 clusterArray->RemoveAt(iCluster);
2734 delete clusterArray;
2740 //_____________________________________________________________________________
2741 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2744 // Get track space point with index i
2745 // Origin: C.Cheshkov
2748 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2749 Int_t idet = cl->GetDetector();
2750 Int_t isector = fGeom->GetSector(idet);
2751 Int_t ichamber = fGeom->GetChamber(idet);
2752 Int_t iplan = fGeom->GetPlane(idet);
2754 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2755 local[1] = cl->GetY();
2756 local[2] = cl->GetZ();
2758 fGeom->RotateBack(idet,local,global);
2759 p.SetXYZ(global[0],global[1],global[2]);
2760 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
2763 iLayer = AliAlignObj::kTRD1;
2766 iLayer = AliAlignObj::kTRD2;
2769 iLayer = AliAlignObj::kTRD3;
2772 iLayer = AliAlignObj::kTRD4;
2775 iLayer = AliAlignObj::kTRD5;
2778 iLayer = AliAlignObj::kTRD6;
2781 Int_t modId = isector * fGeom->Ncham() + ichamber;
2782 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
2783 p.SetVolumeID(volid);
2789 //_____________________________________________________________________________
2790 void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
2793 // This cooks a label. Mmmmh, smells good...
2796 Int_t label = 123456789;
2800 Int_t ncl = pt->GetNumberOfClusters();
2802 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2806 Int_t **s = new Int_t* [kRange];
2807 for (i = 0; i < kRange; i++) {
2808 s[i] = new Int_t[2];
2810 for (i = 0; i < kRange; i++) {
2819 for (i = 0; i < ncl; i++) {
2820 index = pt->GetClusterIndex(i);
2821 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2827 for (i = 0; i < ncl; i++) {
2828 index = pt->GetClusterIndex(i);
2829 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2830 for (Int_t k = 0; k < 3; k++) {
2831 label = c->GetLabel(k);
2832 labelAdded = kFALSE;
2835 while ((!labelAdded) && (j < kRange)) {
2836 if ((s[j][0] == label) ||
2839 s[j][1] = s[j][1] + 1;
2851 for (i = 0; i < kRange; i++) {
2852 if (s[i][1] > max) {
2858 for (i = 0; i < kRange; i++) {
2864 if ((1.0 - Float_t(max)/ncl) > wrong) {
2868 pt->SetLabel(label);
2872 //_____________________________________________________________________________
2873 void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
2876 // Use clusters, but don't abuse them!
2879 const Float_t kmaxchi2 = 18;
2880 const Float_t kmincl = 10;
2882 AliTRDtrack *track = (AliTRDtrack *) t;
2884 Int_t ncl = t->GetNumberOfClusters();
2885 for (Int_t i = from; i < ncl; i++) {
2886 Int_t index = t->GetClusterIndex(i);
2887 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2888 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2889 if (track->GetTracklets(iplane).GetChi2() > kmaxchi2) {
2892 if (track->GetTracklets(iplane).GetN() < kmincl) {
2895 if (!(c->IsUsed())) {
2902 //_____________________________________________________________________________
2903 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2906 // Parametrised "expected" error of the cluster reconstruction in Y
2909 Double_t s = 0.08 * 0.08;
2914 //_____________________________________________________________________________
2915 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2918 // Parametrised "expected" error of the cluster reconstruction in Z
2921 Double_t s = 9.0 * 9.0 / 12.0;
2926 //_____________________________________________________________________________
2927 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2930 // Returns radial position which corresponds to time bin <localTB>
2931 // in tracking sector <sector> and plane <plane>
2934 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2935 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2937 return fTrSec[sector]->GetLayer(pl)->GetX();
2941 //_____________________________________________________________________________
2942 AliTRDtracker::AliTRDpropagationLayer
2943 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2944 , Double_t radLength, Int_t tbIndex, Int_t plane)
2953 ,fTimeBinIndex(tbIndex)
2966 // AliTRDpropagationLayer constructor
2969 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2974 if (fTimeBinIndex >= 0) {
2975 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2976 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2979 for (Int_t i = 0; i < 5; i++) {
2980 fIsHole[i] = kFALSE;
2985 //_____________________________________________________________________________
2986 void AliTRDtracker::AliTRDpropagationLayer
2987 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2988 , Double_t radLength, Double_t Yc, Double_t Zc)
2991 // Sets hole in the layer
3000 fHoleX0 = radLength;
3004 //_____________________________________________________________________________
3005 AliTRDtracker::AliTRDtrackingSector
3006 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
3012 // AliTRDtrackingSector Constructor
3015 AliTRDpadPlane *padPlane = 0;
3016 AliTRDpropagationLayer *ppl = 0;
3018 // Get holes description from geometry
3019 Bool_t holes[AliTRDgeometry::kNcham];
3020 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3021 holes[icham] = fGeom->IsHole(0,icham,gs);
3024 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
3025 fTimeBinIndex[i] = -1;
3033 // Add layers for each of the planes
3034 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
3035 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
3037 const Int_t kNchambers = AliTRDgeometry::Ncham();
3040 Double_t ymaxsensitive = 0;
3041 Double_t *zc = new Double_t[kNchambers];
3042 Double_t *zmax = new Double_t[kNchambers];
3043 Double_t *zmaxsensitive = new Double_t[kNchambers];
3045 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
3047 AliErrorGeneral("AliTRDtrackingSector::Ctor"
3048 ,"Could not get common parameters\n");
3052 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3054 ymax = fGeom->GetChamberWidth(plane) / 2.0;
3055 padPlane = commonParam->GetPadPlane(plane,0);
3056 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
3058 for (Int_t ch = 0; ch < kNchambers; ch++) {
3059 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
3060 Float_t pad = padPlane->GetRowSize(1);
3061 Float_t row0 = commonParam->GetRow0(plane,ch,0);
3062 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
3063 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
3064 zc[ch] = -(pad * nPads) / 2.0 + row0;
3067 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
3068 / commonParam->GetSamplingFrequency();
3069 rho = 0.00295 * 0.85; //????
3072 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
3073 //Double_t xbottom = x0 - dxDrift;
3074 //Double_t xtop = x0 + dxAmp;
3076 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3077 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
3079 Double_t xlayer = iTime * dx - dxAmp;
3080 //if (xlayer<0) xlayer = dxAmp / 2.0;
3083 tbIndex = CookTimeBinIndex(plane,iTime);
3084 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
3085 ppl->SetYmax(ymax,ymaxsensitive);
3086 ppl->SetZ(zc,zmax,zmaxsensitive);
3087 ppl->SetHoles(holes);
3098 delete [] zmaxsensitive;
3102 //_____________________________________________________________________________
3103 AliTRDtracker::AliTRDtrackingSector
3104 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
3115 //_____________________________________________________________________________
3116 Int_t AliTRDtracker::AliTRDtrackingSector
3117 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
3120 // depending on the digitization parameters calculates "global"
3121 // time bin index for timebin <localTB> in plane <plane>
3125 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3126 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
3138 //_____________________________________________________________________________
3139 void AliTRDtracker::AliTRDtrackingSector
3140 ::MapTimeBinLayers()
3143 // For all sensitive time bins sets corresponding layer index
3144 // in the array fTimeBins
3149 for (Int_t i = 0; i < fN; i++) {
3151 index = fLayers[i]->GetTimeBinIndex();
3156 if (index >= (Int_t) kMaxTimeBinIndex) {
3157 //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
3158 // ,index,kMaxTimeBinIndex-1));
3162 fTimeBinIndex[index] = i;
3168 //_____________________________________________________________________________
3169 Int_t AliTRDtracker::AliTRDtrackingSector
3170 ::GetLayerNumber(Double_t x) const
3173 // Returns the number of time bin which in radial position is closest to <x>
3176 if (x >= fLayers[fN-1]->GetX()) {
3179 if (x <= fLayers[ 0]->GetX()) {
3185 Int_t m = (b + e) / 2;
3187 for ( ; b < e; m = (b + e) / 2) {
3188 if (x > fLayers[m]->GetX()) {
3196 if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
3205 //_____________________________________________________________________________
3206 Int_t AliTRDtracker::AliTRDtrackingSector
3207 ::GetInnerTimeBin() const
3210 // Returns number of the innermost SENSITIVE propagation layer
3213 return GetLayerNumber(0);
3217 //_____________________________________________________________________________
3218 Int_t AliTRDtracker::AliTRDtrackingSector
3219 ::GetOuterTimeBin() const
3222 // Returns number of the outermost SENSITIVE time bin
3225 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3229 //_____________________________________________________________________________
3230 Int_t AliTRDtracker::AliTRDtrackingSector
3231 ::GetNumberOfTimeBins() const
3234 // Returns number of SENSITIVE time bins
3240 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
3241 layer = GetLayerNumber(tb);
3251 //_____________________________________________________________________________
3252 void AliTRDtracker::AliTRDtrackingSector
3253 ::InsertLayer(AliTRDpropagationLayer *pl)
3256 // Insert layer <pl> in fLayers array.
3257 // Layers are sorted according to X coordinate.
3260 if (fN == ((Int_t) kMaxLayersPerSector)) {
3261 //AliWarning("Too many layers !\n");
3270 Int_t i = Find(pl->GetX());
3272 memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3279 //_____________________________________________________________________________
3280 Int_t AliTRDtracker::AliTRDtrackingSector
3281 ::Find(Double_t x) const
3284 // Returns index of the propagation layer nearest to X
3287 if (x <= fLayers[0]->GetX()) {
3291 if (x > fLayers[fN-1]->GetX()) {
3297 Int_t m = (b + e) / 2;
3299 for (; b < e; m = (b + e) / 2) {
3300 if (x > fLayers[m]->GetX()) {
3312 //_____________________________________________________________________________
3313 void AliTRDtracker::AliTRDpropagationLayer
3314 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3317 // set centers and the width of sectors
3320 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3321 fZc[icham] = center[icham];
3322 fZmax[icham] = w[icham];
3323 fZmaxSensitive[icham] = wsensitive[icham];
3328 //_____________________________________________________________________________
3329 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3332 // set centers and the width of sectors
3337 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3338 fIsHole[icham] = holes[icham];
3346 //_____________________________________________________________________________
3347 void AliTRDtracker::AliTRDpropagationLayer
3348 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3351 // Insert cluster in cluster array.
3352 // Clusters are sorted according to Y coordinate.
3355 if (fTimeBinIndex < 0) {
3356 //AliWarning("Attempt to insert cluster into non-sensitive time bin!\n");
3360 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3361 //AliWarning("Too many clusters !\n");
3367 fClusters[fN++] = c;
3371 Int_t i = Find(c->GetY());
3372 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3373 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3380 //_____________________________________________________________________________
3381 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3384 // Returns index of the cluster nearest in Y
3390 if (y <= fClusters[0]->GetY()) {
3393 if (y > fClusters[fN-1]->GetY()) {
3399 Int_t m = (b + e) / 2;
3401 for ( ; b < e; m = (b + e) / 2) {
3402 if (y > fClusters[m]->GetY()) {
3414 //_____________________________________________________________________________
3415 Int_t AliTRDtracker::AliTRDpropagationLayer
3416 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3417 , Float_t maxroadz) const
3420 // Returns index of the cluster nearest to the given y,z
3425 Float_t mindist = maxroad;
3427 for (Int_t i = Find(y-maxroad); i < maxn; i++) {
3428 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3429 Float_t ycl = c->GetY();
3430 if (ycl > (y + maxroad)) {
3433 if (TMath::Abs(c->GetZ() - z) > maxroadz) {
3436 if (TMath::Abs(ycl - y) < mindist) {
3437 mindist = TMath::Abs(ycl - y);
3446 //_____________________________________________________________________________
3447 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
3450 // Returns correction factor for tilted pads geometry
3453 Int_t det = c->GetDetector();
3454 Int_t plane = fGeom->GetPlane(det);
3455 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
3456 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3466 //_____________________________________________________________________________
3467 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack &TRDtrack)
3470 // This is setting fdEdxPlane and fTimBinPlane
3471 // Sums up the charge in each plane for track TRDtrack and also get the
3472 // Time bin for Max. Cluster
3473 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
3476 Double_t clscharge[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3477 Double_t maxclscharge[AliESDtrack::kNPlane];
3478 Int_t nCluster[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3479 Int_t timebin[AliESDtrack::kNPlane];
3481 // Initialization of cluster charge per plane.
3482 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3483 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3484 clscharge[iPlane][iSlice] = 0.0;
3485 nCluster[iPlane][iSlice] = 0;
3489 // Initialization of cluster charge per plane.
3490 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3491 timebin[iPlane] = -1;
3492 maxclscharge[iPlane] = 0.0;
3495 // Loop through all clusters associated to track TRDtrack
3496 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
3497 for (Int_t iClus = 0; iClus < nClus; iClus++) {
3498 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
3499 Int_t index = TRDtrack.GetClusterIndex(iClus);
3500 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
3504 Int_t tb = pTRDcluster->GetLocalTimeBin();
3508 Int_t detector = pTRDcluster->GetDetector();
3509 Int_t iPlane = fGeom->GetPlane(detector);
3510 if (iPlane >= AliESDtrack::kNPlane) {
3511 AliError(Form("Wrong plane %d",iPlane));
3514 Int_t iSlice = tb * AliESDtrack::kNSlice
3515 / AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
3516 if (iSlice >= AliESDtrack::kNSlice) {
3517 AliError(Form("Wrong slice %d",iSlice));
3520 clscharge[iPlane][iSlice] = clscharge[iPlane][iSlice] + charge;
3521 if (charge > maxclscharge[iPlane]) {
3522 maxclscharge[iPlane] = charge;
3523 timebin[iPlane] = tb;
3525 nCluster[iPlane][iSlice]++;
3526 } // End of loop over cluster
3528 // Setting the fdEdxPlane and fTimBinPlane variabales
3529 Double_t totalCharge = 0.0;
3531 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3532 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3533 if (nCluster[iPlane][iSlice]) {
3534 clscharge[iPlane][iSlice] /= nCluster[iPlane][iSlice];
3536 TRDtrack.SetPIDsignals(clscharge[iPlane][iSlice],iPlane,iSlice);
3537 totalCharge = totalCharge+clscharge[iPlane][iSlice];
3539 TRDtrack.SetPIDTimBin(timebin[iPlane],iPlane);
3542 // Still needed ????
3544 // Int_t nc=TRDtrack.GetNumberOfClusters();
3546 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
3548 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3549 // TRDtrack.SetPIDsignals(dedx, iPlane);
3550 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
3555 //_____________________________________________________________________________
3556 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3557 , AliTRDtrack *track
3558 , Int_t *clusters, AliTRDtracklet &tracklet)
3562 // Try to find nearest clusters to the track in timebins from t0 to t1
3564 // Correction coeficients - depend on TRD parameters - to be changed accordingly
3570 Double_t xmean = 0.0; // Reference x
3571 Double_t dz[10][100];
3572 Double_t dy[10][100];
3576 Int_t indexes[10][100]; // Indexes of the clusters in the road
3577 Int_t best[10][100]; // Index of best matching cluster
3578 AliTRDcluster *cl[10][100]; // Pointers to the clusters in the road
3580 for (Int_t it = 0; it < 100; it++) {
3587 for (Int_t ih = 0; ih < 10;ih++) {
3588 indexes[ih][it] = -2; // Reset indexes1
3590 dz[ih][it] = -100.0;
3591 dy[ih][it] = -100.0;
3596 Double_t x0 = track->GetX();
3597 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3602 Int_t detector = -1;
3603 Float_t padlength = 0.0;
3604 AliTRDtrack track2(* track);
3605 Float_t snpy = track->GetSnp();
3606 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3611 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
3612 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3613 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3619 for (Int_t it = 0; it < t1-t0; it++) {
3621 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3622 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
3624 continue; // No indexes1
3627 Int_t maxn = timeBin;
3628 x[it] = timeBin.GetX();
3629 track2.PropagateTo(x[it]);
3630 yt[it] = track2.GetY();
3631 zt[it] = track2.GetZ();
3633 Double_t y = yt[it];
3634 Double_t z = zt[it];
3635 Double_t chi2 = 1000000.0;
3639 // Find 2 nearest cluster at given time bin
3641 int checkPoint[4] = {0,0,0,0};
3642 double minY = 123456789;
3643 double minD[2] = {1,1};
3645 for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
3646 //for (Int_t i = 0; i < maxn; i++) {
3648 AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
3649 h01 = GetTiltFactor(c);
3651 Int_t det = c->GetDetector();
3652 plane = fGeom->GetPlane(det);
3653 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3656 //if (c->GetLocalTimeBin()==0) continue;
3657 if (c->GetY() > (y + road)) {
3661 fHDeltaX->Fill(c->GetX() - x[it]);
3662 //printf("%f\t%f\t%f \n", c->GetX(), x[it], c->GetX()-x[it]);
3664 if (TMath::Abs(c->GetY()-y) < TMath::Abs(minY)) {
3666 minD[0] = c->GetY()-y;
3667 minD[1] = c->GetZ()-z;
3672 fHMinZ->Fill(c->GetZ() - z);
3673 if ((c->GetZ() - z) * (c->GetZ() - z) > 2 * (12.0 * sz2)) {
3678 Double_t dist = TMath::Abs(c->GetZ() - z);
3679 if (dist > (0.5 * padlength + 6.0 * sigmaz)) { // 0.5
3680 continue; // 6 sigma boundary cut
3684 Double_t cost = 0.0;
3685 // Sigma boundary cost function
3686 if (dist> (0.5 * padlength - sigmaz)){
3687 cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
3689 cost = (cost + 1.0) * (cost + 1.0);
3695 //Int_t label = TMath::Abs(track->GetLabel());
3696 //if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
3697 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3700 if (chi2 > maxChi2[1]) {
3705 detector = c->GetDetector();
3706 // Store the clusters in the road
3707 for (Int_t ih = 2; ih < 9; ih++) {
3708 if (cl[ih][it] == 0) {
3710 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3715 if (chi2 < maxChi2[0]) {
3716 maxChi2[1] = maxChi2[0];
3718 indexes[1][it] = indexes[0][it];
3719 cl[1][it] = cl[0][it];
3720 indexes[0][it] = timeBin.GetIndex(i);
3726 indexes[1][it] = timeBin.GetIndex(i);
3730 for(int iCheckPoint = 0; iCheckPoint<4; iCheckPoint++)
3731 fHFindCl[iCheckPoint]->Fill(checkPoint[iCheckPoint]);
3733 if (checkPoint[3]) {
3734 if (track->GetPt() > 0) fHMinYPos->Fill(minY);
3735 else fHMinYNeg->Fill(minY);
3737 fHMinD->Fill(minD[0], minD[1]);
3750 xmean /= Float_t(nfound); // Middle x
3751 track2.PropagateTo(xmean); // Propagate track to the center
3754 // Choose one of the variants
3759 Double_t sumdy = 0.0;
3760 Double_t sumdy2 = 0.0;
3761 Double_t sumx = 0.0;
3762 Double_t sumxy = 0.0;
3763 Double_t sumx2 = 0.0;
3764 Double_t mpads = 0.0;
3770 Double_t moffset[10]; // Mean offset
3771 Double_t mean[10]; // Mean value
3772 Double_t angle[10]; // Angle
3774 Double_t smoffset[10]; // Sigma of mean offset
3775 Double_t smean[10]; // Sigma of mean value
3776 Double_t sangle[10]; // Sigma of angle
3777 Double_t smeanangle[10]; // Correlation
3779 Double_t sigmas[10];
3780 Double_t tchi2s[10]; // Chi2s for tracklet
3782 for (Int_t it = 0; it < 10; it++) {
3788 moffset[it] = 0.0; // Mean offset
3789 mean[it] = 0.0; // Mean value
3790 angle[it] = 0.0; // Angle
3792 smoffset[it] = 1.0e5; // Sigma of mean offset
3793 smean[it] = 1.0e5; // Sigma of mean value
3794 sangle[it] = 1.0e5; // Sigma of angle
3795 smeanangle[it] = 0.0; // Correlation
3798 tchi2s[it] = 1.0e5; // Chi2s for tracklet
3805 for (Int_t it = 0; it < t1 - t0; it++) {
3809 for (Int_t dt = -3; dt <= 3; dt++) {
3813 if (it+dt > t1-t0) {
3816 if (!cl[0][it+dt]) {
3819 zmean[it] += cl[0][it+dt]->GetZ();
3822 zmean[it] /= nmean[it];
3825 for (Int_t it = 0; it < t1 - t0; it++) {
3829 for (Int_t ih = 0; ih < 10; ih++) {
3830 dz[ih][it] = -100.0;
3831 dy[ih][it] = -100.0;
3835 Double_t xcluster = cl[ih][it]->GetX();
3838 track2.GetProlongation(xcluster,ytrack,ztrack );
3839 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
3840 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
3847 if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
3849 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
3857 // Iterative choice of "best path"
3859 Int_t label = TMath::Abs(track->GetLabel());
3862 for (Int_t iter = 0; iter < 9; iter++) {
3877 for (Int_t it = 0; it < t1 - t0; it++) {
3879 if (!cl[best[iter][it]][it]) {
3883 // Calculates pad-row changes
3884 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3885 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3886 for (Int_t itd = it - 1; itd >= 0; itd--) {
3887 if (cl[best[iter][itd]][itd]) {
3888 zbefore = cl[best[iter][itd]][itd]->GetZ();
3892 for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
3893 if (cl[best[iter][itd]][itd]) {
3894 zafter = cl[best[iter][itd]][itd]->GetZ();
3898 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
3899 (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
3903 Double_t dx = x[it]-xmean; // Distance to reference x
3904 sumz += cl[best[iter][it]][it]->GetZ();
3906 sumdy += dy[best[iter][it]][it];
3907 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3910 sumxy += dx*dy[best[iter][it]][it];
3911 mpads += cl[best[iter][it]][it]->GetNPads();
3912 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3913 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3914 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3924 // calculates line parameters
3926 Double_t det = sum*sumx2 - sumx*sumx;
3927 angle[iter] = (sum*sumxy - sumx*sumdy) / det;
3928 mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
3929 meanz[iter] = sumz / sum;
3930 moffset[iter] = sumdy / sum;
3931 mpads /= sum; // Mean number of pads
3933 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3934 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3936 for (Int_t it = 0; it < t1 - t0; it++) {
3937 if (!cl[best[iter][it]][it]) {
3940 Double_t dx = x[it] - xmean;
3941 Double_t ytr = mean[iter] + angle[iter] * dx;
3942 sigma2 += (dy[best[iter][it]][it] - ytr)
3943 * (dy[best[iter][it]][it] - ytr);
3944 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3945 * (dy[best[iter][it]][it] - moffset[iter]);
3948 sigma2 /= (sum - 2); // Normalized residuals
3949 sigma1 /= (sum - 1); // Normalized residuals
3950 smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
3951 sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
3952 smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
3953 sigmas[iter] = TMath::Sqrt(sigma1);
3954 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3957 // Iterative choice of "better path"
3959 for (Int_t it = 0; it < t1 - t0; it++) {
3961 if (!cl[best[iter][it]][it]) {
3965 // Add unisochronity + angular effect contribution
3966 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3967 Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
3968 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3969 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3970 Double_t mindist = 100000.0;
3973 for (Int_t ih = 0; ih < 10; ih++) {
3977 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3978 dist2 *= dist2; // Chi2 distance
3979 if (dist2 < mindist) {
3984 best[iter+1][it] = ihbest;
3988 // Update best hypothesy if better chi2 according tracklet position and angle
3990 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3991 Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
3992 Double_t say = track->GetSigmaSnpY(); // track->fCey;
3993 //Double_t chi20 = mean[bestiter]*mean[bestiter ] / sy2+angle[bestiter]*angle[bestiter]/sa2;
3994 //Double_t chi21 = mean[iter]*mean[iter] / sy2+angle[iter]*angle[iter]/sa2;
3996 Double_t detchi = sy2*sa2 - say*say;
3997 Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
3999 Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
4000 + angle[bestiter] * angle[bestiter] * invers[1]
4001 + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
4002 Double_t chi21 = mean[iter] * mean[iter] * invers[0]
4003 + angle[iter] * angle[iter] * invers[1]
4004 + 2.0 * mean[iter] * angle[iter] * invers[2];
4005 tchi2s[iter] = chi21;
4007 if ((changes[iter] <= changes[bestiter]) &&
4017 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
4018 Short_t maxpos = -1;
4019 Float_t maxcharge = 0.0;
4020 Short_t maxpos4 = -1;
4021 Float_t maxcharge4 = 0.0;
4022 Short_t maxpos5 = -1;
4023 Float_t maxcharge5 = 0.0;
4025 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
4026 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
4028 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
4029 ,-AliTracker::GetBz()*0.1);
4030 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
4032 expectederr += (mpads - 3.5) * 0.04;
4034 if (changes[bestiter] > 1) {
4035 expectederr += changes[bestiter] * 0.01;
4037 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
4038 //if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
4039 //expectederr+=10000;
4041 for (Int_t it = 0; it < t1 - t0; it++) {
4043 if (!cl[best[bestiter][it]][it]) {
4047 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // Set cluster error
4048 if (!cl[best[bestiter][it]][it]->IsUsed()) {
4049 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
4050 //cl[best[bestiter][it]][it]->Use();
4053 // Time bins with maximal charge
4054 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
4055 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4056 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4059 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
4060 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
4061 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4062 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4066 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
4067 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
4068 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4069 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4073 // Time bins with maximal charge
4074 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
4075 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4076 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4079 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
4080 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
4081 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4082 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4086 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
4087 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
4088 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4089 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4093 clusters[it+t0] = indexes[best[bestiter][it]][it];
4095 // Still needed ????
4096 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 &&
4097 //cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0]
4098 // = indexes[best[bestiter][it]][it]; //Test
4103 // Set tracklet parameters
4105 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
4107 trackleterr2 += (mpads - 3.5) * 0.04;
4109 trackleterr2 += changes[bestiter] * 0.01;
4110 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
4111 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
4113 // Set tracklet parameters
4115 ,track2.GetY() + moffset[bestiter]
4119 tracklet.SetTilt(h01);
4120 tracklet.SetP0(mean[bestiter]);
4121 tracklet.SetP1(angle[bestiter]);
4122 tracklet.SetN(nfound);
4123 tracklet.SetNCross(changes[bestiter]);
4124 tracklet.SetPlane(plane);
4125 tracklet.SetSigma2(expectederr);
4126 tracklet.SetChi2(tchi2s[bestiter]);
4127 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
4128 track->SetTracklets(plane,tracklet);
4129 track->SetNWrong(track->GetNWrong() + nbad[0]);
4134 TClonesArray array0("AliTRDcluster");
4135 TClonesArray array1("AliTRDcluster");
4136 array0.ExpandCreateFast(t1 - t0 + 1);
4137 array1.ExpandCreateFast(t1 - t0 + 1);
4138 TTreeSRedirector &cstream = *fDebugStreamer;
4139 AliTRDcluster dummy;
4143 for (Int_t it = 0; it < t1 - t0; it++) {
4144 dy0[it] = dy[0][it];
4145 dyb[it] = dy[best[bestiter][it]][it];
4147 new(array0[it]) AliTRDcluster(*cl[0][it]);
4150 new(array0[it]) AliTRDcluster(dummy);
4152 if(cl[best[bestiter][it]][it]) {
4153 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
4156 new(array1[it]) AliTRDcluster(dummy);
4159 TGraph graph0(t1-t0,x,dy0);
4160 TGraph graph1(t1-t0,x,dyb);
4161 TGraph graphy(t1-t0,x,yt);
4162 TGraph graphz(t1-t0,x,zt);
4164 if (AliTRDReconstructor::StreamLevel() > 0) {
4165 cstream << "tracklet"
4166 << "track.=" << track // Track parameters
4167 << "tany=" << tany // Tangent of the local track angle
4168 << "xmean=" << xmean // Xmean - reference x of tracklet
4169 << "tilt=" << h01 // Tilt angle
4170 << "nall=" << nall // Number of foundable clusters
4171 << "nfound=" << nfound // Number of found clusters
4172 << "clfound=" << clfound // Total number of found clusters in road
4173 << "mpads=" << mpads // Mean number of pads per cluster
4174 << "plane=" << plane // Plane number
4175 << "detector=" << detector // Detector number
4176 << "road=" << road // The width of the used road
4177 << "graph0.=" << &graph0 // x - y = dy for closest cluster
4178 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
4179 << "graphy.=" << &graphy // y position of the track
4180 << "graphz.=" << &graphz // z position of the track
4181 //<< "fCl.=" << &array0 // closest cluster
4182 //<< "fCl2.=" << &array1 // second closest cluster
4183 << "maxpos=" << maxpos // Maximal charge postion
4184 << "maxcharge=" << maxcharge // Maximal charge
4185 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
4186 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
4187 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
4188 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
4189 << "bestiter=" << bestiter // Best iteration number
4190 << "tracklet.=" << &tracklet // Corrspond to the best iteration
4191 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
4192 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
4193 << "sigmas0=" << sigmas[0] // Residuals sigma
4194 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
4195 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
4196 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
4197 << "ngoodb=" << ngood[bestiter] // in best iteration
4198 << "nbadb=" << nbad[bestiter] // in best iteration
4199 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
4200 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
4201 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
4202 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
4203 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
4204 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
4205 << "mean0=" << mean[0] // Mean dy in iter=0;
4206 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
4207 << "meanb=" << mean[bestiter] // Mean dy in iter=best
4208 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
4209 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
4210 << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
4211 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
4212 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
4213 << "expectederr=" << expectederr // Expected error of cluster position
4221 //_____________________________________________________________________________
4222 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
4223 , Int_t *outlist, Bool_t down)
4226 // Sort eleements according occurancy
4227 // The size of output array has is 2*n
4230 Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
4231 Int_t *sindexF = new Int_t[2*n];
4232 for (Int_t i = 0; i < n; i++) {
4236 TMath::Sort(n,inlist,sindexS,down);
4238 Int_t last = inlist[sindexS[0]];
4241 sindexF[0+n] = last;
4245 for (Int_t i = 1; i < n; i++) {
4246 val = inlist[sindexS[i]];
4248 sindexF[countPos]++;
4252 sindexF[countPos+n] = val;
4253 sindexF[countPos]++;
4261 // Sort according frequency
4262 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
4264 for (Int_t i = 0; i < countPos; i++) {
4265 outlist[2*i ] = sindexF[sindexS[i]+n];
4266 outlist[2*i+1] = sindexF[sindexS[i]];
4276 //_____________________________________________________________________________
4277 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
4283 Double_t alpha = AliTRDgeometry::GetAlpha();
4284 Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
4288 c[ 1] = 0.0; c[ 2] = 2.0;
4289 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
4290 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
4291 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4294 AliTRDcluster *cl = 0;
4296 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
4297 if (seeds[ilayer].IsOK()) {
4298 for (Int_t itime = 22; itime > 0; itime--) {
4299 if (seeds[ilayer].GetIndexes(itime) > 0) {
4300 index = seeds[ilayer].GetIndexes(itime);
4301 cl = seeds[ilayer].GetClusters(itime);
4314 AliTRDtrack *track = new AliTRDtrack(cl
4319 ,params[6]*alpha+shift);
4320 track->PropagateTo(params[0]-5.0);
4321 track->ResetCovariance(1);
4323 Int_t rc = FollowBackProlongation(*track);
4330 CookdEdxTimBin(*track);
4331 CookLabel(track,0.9);
4337 //////////////////////////////////////////////////////////////////////////////////////////
4339 void AliTRDtracker::InitLogHists() {
4341 fHBackfit = new TH1D("logTRD_backfit", "", 40, -0.5, 39.5);
4342 fHRefit = new TH1D("logTRD_refit", "", 40, -0.5, 39.5);
4343 fHClSearch = new TH1D("logTRD_clSearch", "", 60, -0.5, 59.5);
4345 fHX = new TH1D("logTRD_X", ";x (cm)", 200, 50, 400);
4346 fHNCl = new TH1D("logTRD_ncl", "", 40, -0.5, 39.5);
4347 fHNClTrack = new TH1D("logTRD_nclTrack", "", 180, -0.5, 179.5);
4349 fHMinYPos = new TH1D("logTRD_minYPos", ";#delta Y (cm)", 400, -6, 6);
4350 fHMinYNeg = new TH1D("logTRD_minYNeg", ";#delta Y (cm)", 400, -6, 6);
4351 fHMinZ = new TH1D("logTRD_minZ", ";#delta Z (cm)", 400, -20, 20);
4352 fHMinD = new TH2D("logTRD_minD", ";#delta Y (cm);#delta Z (cm)", 100, -6, 6, 100, -50, 50);
4354 fHDeltaX = new TH1D("logTRD_deltaX", ";#delta X (cm)", 100, -5, 5);
4355 fHXCl = new TH1D("logTRD_xCl", ";cluster x position (cm)", 1000, 280, 380);
4357 const char *nameFindCl[4] = {"logTRD_clY", "logTRD_clZ", "logTRD_clB", "logTRD_clG"};
4359 for(int i=0; i<4; i++) {
4360 fHFindCl[i] = new TH1D(nameFindCl[i], "", 30, -0.5, 29.5);
4364 //////////////////////////////////////////////////////////////////////////////////////////
4366 void AliTRDtracker::SaveLogHists() {
4368 TDirectory *sav = gDirectory;
4371 TSeqCollection *col = gROOT->GetListOfFiles();
4372 int N = col->GetEntries();
4373 for(int i=0; i<N; i++) {
4374 logFile = (TFile*)col->At(i);
4375 if (strstr(logFile->GetName(), "AliESDs.root")) break;
4379 fHBackfit->Write(fHBackfit->GetName(), TObject::kOverwrite);
4380 fHRefit->Write(fHRefit->GetName(), TObject::kOverwrite);
4381 fHClSearch->Write(fHClSearch->GetName(), TObject::kOverwrite);
4382 fHX->Write(fHX->GetName(), TObject::kOverwrite);
4383 fHNCl->Write(fHNCl->GetName(), TObject::kOverwrite);
4384 fHNClTrack->Write(fHNClTrack->GetName(), TObject::kOverwrite);
4386 fHMinYPos->Write(fHMinYPos->GetName(), TObject::kOverwrite);
4387 fHMinYNeg->Write(fHMinYNeg->GetName(), TObject::kOverwrite);
4388 fHMinD->Write(fHMinD->GetName(), TObject::kOverwrite);
4389 fHMinZ->Write(fHMinZ->GetName(), TObject::kOverwrite);
4391 fHDeltaX->Write(fHDeltaX->GetName(), TObject::kOverwrite);
4392 fHXCl->Write(fHXCl->GetName(), TObject::kOverwrite);
4395 for(int i=0; i<4; i++)
4396 fHFindCl[i]->Write(fHFindCl[i]->GetName(), TObject::kOverwrite);
4403 //////////////////////////////////////////////////////////////////////////////////////////