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 ///////////////////////////////////////////////////////////////////////////////
29 #include <Riostream.h>
33 #include <TObjArray.h>
34 #include <TTreeStream.h>
36 #include <TLinearFitter.h>
39 #include "AliAlignObj.h"
40 #include "AliRieman.h"
41 #include "AliTrackPointArray.h"
43 #include "AliTRDgeometry.h"
44 #include "AliTRDpadPlane.h"
45 #include "AliTRDgeometry.h"
46 #include "AliTRDcluster.h"
47 #include "AliTRDtrack.h"
48 #include "AliTRDseed.h"
49 #include "AliTRDcalibDB.h"
50 #include "AliTRDCommonParam.h"
51 #include "AliTRDtracker.h"
52 #include "AliTRDReconstructor.h"
53 #include "AliTRDCalibra.h"
55 ClassImp(AliTRDtracker)
57 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
58 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
59 const Double_t AliTRDtracker::fgkMaxChi2 = 12.0;
60 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Corresponds to tan = 3
61 const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
63 //_____________________________________________________________________________
64 AliTRDtracker::AliTRDtracker()
79 // Default constructor
82 for (Int_t i = 0; i < kTrackingSectors; i++) {
85 for (Int_t j = 0; j < 5; j++) {
86 for (Int_t k = 0; k < 18; k++) {
87 fHoles[j][k] = kFALSE;
93 //_____________________________________________________________________________
94 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
103 ,fTimeBinsPerPlane(0)
104 ,fAddTRDseeds(kFALSE)
113 //_____________________________________________________________________________
114 AliTRDtracker::AliTRDtracker(const TFile *geomfile)
118 ,fClusters(new TObjArray(2000))
120 ,fSeeds(new TObjArray(2000))
122 ,fTracks(new TObjArray(1000))
123 ,fTimeBinsPerPlane(0)
124 ,fAddTRDseeds(kFALSE)
132 TDirectory *savedir = gDirectory;
133 TFile *in = (TFile *) geomfile;
136 AliWarning("geometry file is not open!\n");
137 AliWarning("FULL TRD geometry and DEFAULT TRD parameter will be used\n");
141 fGeom = (AliTRDgeometry *) in->Get("TRDgeometry");
145 AliWarning("Cannot find TRD geometry!\n");
146 fGeom = new AliTRDgeometry();
148 fGeom->ReadGeoMatrices();
152 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
153 Int_t trS = CookSectorIndex(geomS);
154 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
155 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
156 fHoles[icham][trS] = fGeom->IsHole(0,icham,geomS);
160 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
161 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
162 if (tiltAngle < 0.1) {
166 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
168 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
174 //_____________________________________________________________________________
175 AliTRDtracker::~AliTRDtracker()
178 // Destructor of AliTRDtracker
198 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
199 delete fTrSec[geomS];
202 if (fDebugStreamer) {
203 delete fDebugStreamer;
208 //_____________________________________________________________________________
209 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
212 // Transform internal TRD ID to global detector ID
215 Int_t isector = fGeom->GetSector(lid);
216 Int_t ichamber = fGeom->GetChamber(lid);
217 Int_t iplan = fGeom->GetPlane(lid);
219 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
222 iLayer = AliAlignObj::kTRD1;
225 iLayer = AliAlignObj::kTRD2;
228 iLayer = AliAlignObj::kTRD3;
231 iLayer = AliAlignObj::kTRD4;
234 iLayer = AliAlignObj::kTRD5;
237 iLayer = AliAlignObj::kTRD6;
241 Int_t modId = isector * fGeom->Ncham() + ichamber;
242 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
248 //_____________________________________________________________________________
249 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
252 // Transform global detector ID to local detector ID
256 AliAlignObj::ELayerID layerId = AliAlignObj::VolUIDToLayer(gid,modId);
258 Int_t isector = modId / fGeom->Ncham();
259 Int_t ichamber = modId % fGeom->Ncham();
263 case AliAlignObj::kTRD1:
266 case AliAlignObj::kTRD2:
269 case AliAlignObj::kTRD3:
272 case AliAlignObj::kTRD4:
275 case AliAlignObj::kTRD5:
278 case AliAlignObj::kTRD6:
289 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
295 //_____________________________________________________________________________
296 Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
299 // Transform something ... whatever ...
302 // Magic constants for geo manager transformation
303 const Double_t kX0shift = 2.52;
304 const Double_t kX0shift5 = 3.05;
307 // Apply alignment and calibration to transform cluster
309 Int_t detector = cluster->GetDetector();
310 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
311 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
312 Int_t sector = fGeom->GetSector(cluster->GetDetector());
314 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
315 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.0); // Drift distance
320 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
321 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
323 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
324 AliTRDpadPlane *padPlane = commonParam->GetPadPlane(plane,chamber);
325 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
326 Double_t localPos[3];
327 Double_t localPosTracker[3];
328 localPos[0] = -cluster->GetX();
329 localPos[1] = cluster->GetY() - driftX * exB;
330 localPos[2] = cluster->GetZ() - zshiftIdeal;
332 cluster->SetY(cluster->GetY() - driftX*exB);
333 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
334 cluster->SetX(xplane- cluster->GetX());
336 TGeoHMatrix *matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
338 // No matrix found - if somebody used geometry with holes
339 AliError("Invalid Geometry - Default Geometry used\n");
342 matrix->LocalToMaster(localPos,localPosTracker);
344 if (AliTRDReconstructor::StreamLevel() > 1) {
345 (* fDebugStreamer) << "Transform"
347 << "matrix.=" << matrix
348 << "Detector=" << detector
349 << "Sector=" << sector
351 << "Chamber=" << chamber
352 << "lx0=" << localPosTracker[0]
353 << "ly0=" << localPosTracker[1]
354 << "lz0=" << localPosTracker[2]
359 cluster->SetX(localPosTracker[0]+kX0shift5);
362 cluster->SetX(localPosTracker[0]+kX0shift);
365 cluster->SetY(localPosTracker[1]);
366 cluster->SetZ(localPosTracker[2]);
372 //_____________________________________________________________________________
373 // Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
376 // // Is this still needed ????
378 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
379 // const Double_t kTime0Cor = 0.32; // time0 correction
381 // const Double_t kX0shift = 2.52;
382 // const Double_t kX0shift5 = 3.05;
385 // // apply alignment and calibration to transform cluster
388 // Int_t detector = cluster->GetDetector();
389 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
390 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
391 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
393 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
394 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
398 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
399 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
402 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
403 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
404 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
405 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
406 // localPos[2] = -cluster->GetX();
407 // localPos[0] = cluster->GetY() - driftX*exB;
408 // localPos[1] = cluster->GetZ() -zshiftIdeal;
409 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
410 // matrix->LocalToMaster(localPos, globalPos);
412 // Double_t sectorAngle = 20.*(sector%18)+10;
413 // TGeoHMatrix rotSector;
414 // rotSector.RotateZ(sectorAngle);
415 // rotSector.LocalToMaster(globalPos, localPosTracker);
418 // TGeoHMatrix matrix2(*matrix);
419 // matrix2.MultiplyLeft(&rotSector);
420 // matrix2.LocalToMaster(localPos,localPosTracker2);
424 // cluster->SetY(cluster->GetY() - driftX*exB);
425 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
426 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
427 // (*fDebugStreamer)<<"Transform"<<
429 // "matrix.="<<matrix<<
430 // "matrix2.="<<&matrix2<<
431 // "Detector="<<detector<<
432 // "Sector="<<sector<<
434 // "Chamber="<<chamber<<
435 // "lx0="<<localPosTracker[0]<<
436 // "ly0="<<localPosTracker[1]<<
437 // "lz0="<<localPosTracker[2]<<
438 // "lx2="<<localPosTracker2[0]<<
439 // "ly2="<<localPosTracker2[1]<<
440 // "lz2="<<localPosTracker2[2]<<
444 // cluster->SetX(localPosTracker[0]+kX0shift5);
446 // cluster->SetX(localPosTracker[0]+kX0shift);
448 // cluster->SetY(localPosTracker[1]);
449 // cluster->SetZ(localPosTracker[2]);
453 //_____________________________________________________________________________
454 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
457 // Rotates the track when necessary
460 Double_t alpha = AliTRDgeometry::GetAlpha();
461 Double_t y = track->GetY();
462 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
464 // Is this still needed ????
465 //Int_t ns = AliTRDgeometry::kNsect;
466 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
470 if (!track->Rotate( alpha)) {
474 else if (y < -ymax) {
476 if (!track->Rotate(-alpha)) {
485 //_____________________________________________________________________________
486 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
487 , Int_t timebin, UInt_t &index)
490 // Try to find cluster in the backup list
493 AliTRDcluster *cl =0;
494 Int_t *indexes = track->GetBackupIndexes();
496 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
497 if (indexes[i] == 0) {
500 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
504 if (cli->GetLocalTimeBin() != timebin) {
507 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
508 if (iplane == plane) {
519 //_____________________________________________________________________________
520 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
523 // Return last updated plane
527 Int_t *indexes = track->GetBackupIndexes();
529 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
530 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
534 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
535 if (iplane > lastplane) {
544 //_____________________________________________________________________________
545 Int_t AliTRDtracker::Clusters2Tracks(AliESD *event)
548 // Finds tracks within the TRD. The ESD event is expected to contain seeds
549 // at the outer part of the TRD. The seeds
550 // are found within the TRD if fAddTRDseeds is TRUE.
551 // The tracks are propagated to the innermost time bin
552 // of the TRD and the ESD event is updated
555 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
556 Float_t foundMin = fgkMinClustersInTrack * timeBins;
559 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
561 Int_t n = event->GetNumberOfTracks();
562 for (Int_t i = 0; i < n; i++) {
564 AliESDtrack *seed = event->GetTrack(i);
565 ULong_t status = seed->GetStatus();
566 if ((status & AliESDtrack::kTRDout) == 0) {
569 if ((status & AliESDtrack::kTRDin) != 0) {
574 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
575 //seed2->ResetCovariance();
576 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
577 AliTRDtrack &t = *pt;
578 FollowProlongation(t);
579 if (t.GetNumberOfClusters() >= foundMin) {
581 CookLabel(pt,1 - fgkLabelFraction);
586 Double_t xTPC = 250.0;
587 if (PropagateToX(t,xTPC,fgkMaxStep)) {
588 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
595 AliInfo(Form("Number of loaded seeds: %d",nseed));
596 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
597 AliInfo(Form("Total number of found tracks: %d",found));
603 //_____________________________________________________________________________
604 Int_t AliTRDtracker::PropagateBack(AliESD *event)
607 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
608 // backpropagated by the TPC tracker. Each seed is first propagated
609 // to the TRD, and then its prolongation is searched in the TRD.
610 // If sufficiently long continuation of the track is found in the TRD
611 // the track is updated, otherwise it's stored as originaly defined
612 // by the TPC tracker.
616 Float_t foundMin = 20.0;
617 Int_t n = event->GetNumberOfTracks();
620 Float_t *quality = new Float_t[n];
621 Int_t *index = new Int_t[n];
622 for (Int_t i = 0; i < n; i++) {
623 AliESDtrack *seed = event->GetTrack(i);
624 Double_t covariance[15];
625 seed->GetExternalCovariance(covariance);
626 quality[i] = covariance[0]+covariance[2];
628 TMath::Sort(n,quality,index,kFALSE);
630 for (Int_t i = 0; i < n; i++) {
632 //AliESDtrack *seed = event->GetTrack(i);
633 AliESDtrack *seed = event->GetTrack(index[i]);
635 ULong_t status = seed->GetStatus();
636 if ((status & AliESDtrack::kTPCout) == 0) {
639 if ((status & AliESDtrack::kTRDout) != 0) {
643 Int_t lbl = seed->GetLabel();
644 AliTRDtrack *track = new AliTRDtrack(*seed);
645 track->SetSeedLabel(lbl);
646 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
648 Float_t p4 = track->GetC();
650 Int_t expectedClr = FollowBackProlongation(*track);
651 if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
652 (TMath::Abs(track->GetPt()) > 0.8)) {
655 // Make backup for back propagation
658 Int_t foundClr = track->GetNumberOfClusters();
659 if (foundClr >= foundMin) {
661 CookdEdxTimBin(*track);
662 CookLabel(track,1 - fgkLabelFraction);
663 if (track->GetBackupTrack()) {
664 UseClusters(track->GetBackupTrack());
667 // Sign only gold tracks
668 if (track->GetChi2() / track->GetNumberOfClusters() < 4) {
669 if ((seed->GetKinkIndex(0) == 0) &&
670 (TMath::Abs(track->GetPt()) < 1.5)) {
674 Bool_t isGold = kFALSE;
677 if (track->GetChi2() / track->GetNumberOfClusters() < 5) {
678 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
679 if (track->GetBackupTrack()) {
680 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
687 (track->GetNCross() == 0) &&
688 (track->GetChi2() / track->GetNumberOfClusters() < 7)) {
689 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
690 if (track->GetBackupTrack()) {
691 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
697 (track->GetBackupTrack())) {
698 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
699 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
700 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
705 if ((track->StatusForTOF() > 0) &&
706 (track->fNCross == 0) &&
707 (Float_t(track->fN)/Float_t(track->fNExpected) > 0.4)) {
708 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
715 // Debug part of tracking
716 TTreeSRedirector &cstream = *fDebugStreamer;
717 Int_t eventNr = event->GetEventNumber();
718 if (AliTRDReconstructor::StreamLevel() > 0) {
719 if (track->GetBackupTrack()) {
721 << "EventNr=" << eventNr
724 << "trdback.=" << track->GetBackupTrack()
729 << "EventNr=" << eventNr
732 << "trdback.=" << track
737 // Propagation to the TOF (I.Belikov)
738 if (track->GetStop() == kFALSE) {
740 Double_t xtof = 371.0;
741 Double_t c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
742 if (TMath::Abs(c2) >= 0.99) {
746 Double_t xTOF0 = 370.0;
747 PropagateToX(*track,xTOF0,fgkMaxStep);
749 // Energy losses taken to the account - check one more time
750 c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
751 if (TMath::Abs(c2) >= 0.99) {
756 Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
758 track->GetYAt(xtof,GetBz(),y);
760 if (!track->Rotate( AliTRDgeometry::GetAlpha())) {
765 else if (y < -ymax) {
766 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
772 if (track->PropagateTo(xtof)) {
773 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
774 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
775 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
776 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
778 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
780 //seed->SetTRDtrack(new AliTRDtrack(*track));
781 if (track->GetNumberOfClusters() > foundMin) {
789 if ((track->GetNumberOfClusters() > 15) &&
790 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
791 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
792 //seed->SetStatus(AliESDtrack::kTRDStop);
793 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
794 for (Int_t j = 0; j <AliESDtrack::kNSlice; j++) {
795 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
797 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
799 //seed->SetTRDtrack(new AliTRDtrack(*track));
805 seed->SetTRDQuality(track->StatusForTOF());
806 seed->SetTRDBudget(track->fBudget[0]);
812 AliInfo(Form("Number of seeds: %d",fNseeds));
813 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
816 if (AliTRDReconstructor::SeedingOn()) {
817 MakeSeedsMI(3,5,event);
830 //_____________________________________________________________________________
831 Int_t AliTRDtracker::RefitInward(AliESD *event)
834 // Refits tracks within the TRD. The ESD event is expected to contain seeds
835 // at the outer part of the TRD.
836 // The tracks are propagated to the innermost time bin
837 // of the TRD and the ESD event is updated
838 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
841 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
842 Float_t foundMin = fgkMinClustersInTrack * timeBins;
845 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
848 Int_t n = event->GetNumberOfTracks();
849 for (Int_t i = 0; i < n; i++) {
851 AliESDtrack *seed = event->GetTrack(i);
852 new (&seed2) AliTRDtrack(*seed);
853 if (seed2.GetX() < 270.0) {
854 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
858 ULong_t status = seed->GetStatus();
859 if ((status & AliESDtrack::kTRDout) == 0) {
862 if ((status & AliESDtrack::kTRDin) != 0) {
867 seed2.ResetCovariance(50.0);
869 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
870 Int_t *indexes2 = seed2.GetIndexes();
871 for (Int_t i = 0; i < AliESDtrack::kNPlane;i++) {
872 for (Int_t j = 0; j < AliESDtrack::kNSlice;j++) {
873 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
875 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
878 Int_t *indexes3 = pt->GetBackupIndexes();
879 for (Int_t i = 0; i < 200;i++) {
880 if (indexes2[i] == 0) {
883 indexes3[i] = indexes2[i];
886 //AliTRDtrack *pt = seed2;
887 AliTRDtrack &t = *pt;
888 FollowProlongation(t);
889 if (t.GetNumberOfClusters() >= foundMin) {
891 //CookLabel(pt, 1-fgkLabelFraction);
897 Double_t xTPC = 250.0;
898 if (PropagateToX(t,xTPC,fgkMaxStep)) {
899 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
900 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
901 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
902 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
904 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
908 // If not prolongation to TPC - propagate without update
909 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
910 seed2->ResetCovariance(5.0);
911 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
913 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
915 CookdEdxTimBin(*pt2);
916 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
917 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
918 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
919 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
921 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
931 AliInfo(Form("Number of loaded seeds: %d",nseed));
932 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
938 //_____________________________________________________________________________
939 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
942 // Starting from current position on track=t this function tries
943 // to extrapolate the track up to timeBin=0 and to confirm prolongation
944 // if a close cluster is found. Returns the number of clusters
945 // expected to be found in sensitive layers
946 // GeoManager used to estimate mean density
950 Int_t lastplane = GetLastPlane(&t);
951 Double_t radLength = 0.0;
953 Int_t expectedNumberOfClusters = 0;
955 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
957 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
958 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
961 // Propagate track close to the plane if neccessary
963 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
964 if (currentx < (-fgkMaxStep + t.GetX())) {
965 // Propagate closer to chamber - safety space fgkMaxStep
966 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
971 if (!AdjustSector(&t)) {
976 // Get material budget
985 // Starting global position
987 // End global position
988 x = fTrSec[0]->GetLayer(row0)->GetX();
989 if (!t.GetProlongation(x,y,z)) {
992 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
993 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
995 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
997 radLength = param[1]; // Get mean propagation parameters
1000 // Propagate and update
1002 sector = t.GetSector();
1003 //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
1004 for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
1006 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
1007 expectedNumberOfClusters++;
1009 if (t.GetX() > 345.0) {
1012 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1013 AliTRDcluster *cl = 0;
1015 Double_t maxChi2 = fgkMaxChi2;
1020 AliTRDcluster *cl0 = timeBin[0];
1022 // No clusters in given time bin
1026 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1027 if (plane > lastplane) {
1031 Int_t timebin = cl0->GetLocalTimeBin();
1032 AliTRDcluster *cl2 = GetCluster(&t,plane,timebin,index);
1037 //Double_t h01 = GetTiltFactor(cl); //I.B's fix
1038 //maxChi2=t.GetPredictedChi2(cl,h01);
1043 //if (cl->GetNPads()<5)
1044 Double_t dxsample = timeBin.GetdX();
1045 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1046 Double_t h01 = GetTiltFactor(cl);
1047 Int_t det = cl->GetDetector();
1048 Int_t plane = fGeom->GetPlane(det);
1049 if (t.GetX() > 345.0) {
1051 t.fChi2Last += maxChi2;
1054 Double_t xcluster = cl->GetX();
1055 t.PropagateTo(xcluster,radLength,rho);
1057 if (!AdjustSector(&t)) {
1060 maxChi2 = t.GetPredictedChi2(cl,h01);
1062 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1074 return expectedNumberOfClusters;
1078 //_____________________________________________________________________________
1079 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
1082 // Starting from current radial position of track <t> this function
1083 // extrapolates the track up to outer timebin and in the sensitive
1084 // layers confirms prolongation if a close cluster is found.
1085 // Returns the number of clusters expected to be found in sensitive layers
1086 // Use GEO manager for material Description
1090 Int_t clusters[1000];
1091 Double_t radLength = 0.0;
1093 Int_t expectedNumberOfClusters = 0;
1094 Float_t ratio0 = 0.0;
1095 AliTRDtracklet tracklet;
1097 // Calibration fill 2D
1098 AliTRDCalibra *calibra = AliTRDCalibra::Instance();
1100 AliInfo("Could not get Calibra instance\n");
1102 if (calibra->GetMItracking()) {
1103 calibra->Resettrack();
1106 for (Int_t i = 0; i < 1000; i++) {
1110 for (Int_t iplane = 0; iplane < AliESDtrack::kNPlane; iplane++) {
1112 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1113 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1114 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1115 if (currentx < t.GetX()) {
1120 // Propagate closer to chamber if neccessary
1122 if (currentx > (fgkMaxStep + t.GetX())) {
1123 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
1127 if (!AdjustSector(&t)) {
1130 if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
1135 // Get material budget inside of chamber
1143 // Starting global position
1145 // End global position
1146 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1147 if (!t.GetProlongation(x,y,z)) {
1150 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1151 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1153 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1155 radLength = param[1]; // Get mean propagation parameters
1160 sector = t.GetSector();
1161 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1162 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
1167 // Propagate and update track
1169 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1171 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1172 expectedNumberOfClusters++;
1174 if (t.GetX() > 345.0) {
1177 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1178 AliTRDcluster *cl = 0;
1180 Double_t maxChi2 = fgkMaxChi2;
1185 if (clusters[ilayer] > 0) {
1186 index = clusters[ilayer];
1187 cl = (AliTRDcluster *)GetCluster(index);
1188 //Double_t h01 = GetTiltFactor(cl); // I.B's fix
1189 //maxChi2=t.GetPredictedChi2(cl,h01); //
1194 //if (cl->GetNPads() < 5)
1195 Double_t dxsample = timeBin.GetdX();
1196 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1197 Double_t h01 = GetTiltFactor(cl);
1198 Int_t det = cl->GetDetector();
1199 Int_t plane = fGeom->GetPlane(det);
1200 if (t.GetX() > 345.0) {
1202 t.fChi2Last += maxChi2;
1204 Double_t xcluster = cl->GetX();
1205 t.PropagateTo(xcluster,radLength,rho);
1206 maxChi2 = t.GetPredictedChi2(cl,h01);
1208 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1209 if (!t.Update(cl,maxChi2,index,h01)) {
1214 if (calibra->GetMItracking()) {
1215 calibra->UpdateHistograms(cl,&t);
1218 // Reset material budget if 2 consecutive gold
1220 if (t.fTracklets[plane].GetN() + t.fTracklets[plane-1].GetN() > 20) {
1231 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1232 Float_t ratio1 = Float_t(t.fN+1) / Float_t(t.fNExpected+1.0);
1233 if ((tracklet.GetChi2() < 18.0) &&
1236 (ratio0+ratio1 > 1.5) &&
1237 (t.GetNCross() == 0) &&
1238 (TMath::Abs(t.GetSnp()) < 0.85) &&
1240 t.MakeBackupTrack(); // Make backup of the track until is gold
1245 return expectedNumberOfClusters;
1249 //_____________________________________________________________________________
1250 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1253 // Starting from current radial position of track <t> this function
1254 // extrapolates the track up to radial position <xToGo>.
1255 // Returns 1 if track reaches the plane, and 0 otherwise
1258 const Double_t kEpsilon = 0.00001;
1259 //Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1260 Double_t xpos = t.GetX();
1261 Double_t dir = (xpos<xToGo) ? 1.0 : -1.0;
1263 while (((xToGo-xpos)*dir) > kEpsilon) {
1265 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1273 // Starting global position
1277 if (!t.GetProlongation(x,y,z)) {
1278 return 0; // No prolongation
1281 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1282 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1285 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1286 if (!t.PropagateTo(x,param[1],param[0])) {
1298 //_____________________________________________________________________________
1299 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1302 // Fills clusters into TRD tracking_sectors
1303 // Note that the numbering scheme for the TRD tracking_sectors
1304 // differs from that of TRD sectors
1307 if (ReadClusters(fClusters,cTree)) {
1308 AliError("Problem with reading the clusters !");
1311 Int_t ncl = fClusters->GetEntriesFast();
1313 AliInfo(Form("Sorting %d clusters",ncl));
1316 for (Int_t ichamber = 0; ichamber < 5; ichamber++) {
1317 for (Int_t isector = 0; isector < 18; isector++) {
1318 fHoles[ichamber][isector] = kTRUE;
1324 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1325 Int_t detector = c->GetDetector();
1326 Int_t localTimeBin = c->GetLocalTimeBin();
1327 Int_t sector = fGeom->GetSector(detector);
1328 Int_t plane = fGeom->GetPlane(detector);
1329 Int_t trackingSector = CookSectorIndex(sector);
1331 if (c->GetLabel(0) > 0) {
1332 Int_t chamber = fGeom->GetChamber(detector);
1333 fHoles[chamber][trackingSector] = kFALSE;
1336 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1340 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1344 // Apply pos correction
1346 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1354 //_____________________________________________________________________________
1355 void AliTRDtracker::UnloadClusters()
1358 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1364 nentr = fClusters->GetEntriesFast();
1365 for (i = 0; i < nentr; i++) {
1366 delete fClusters->RemoveAt(i);
1370 nentr = fSeeds->GetEntriesFast();
1371 for (i = 0; i < nentr; i++) {
1372 delete fSeeds->RemoveAt(i);
1375 nentr = fTracks->GetEntriesFast();
1376 for (i = 0; i < nentr; i++) {
1377 delete fTracks->RemoveAt(i);
1380 Int_t nsec = AliTRDgeometry::kNsect;
1381 for (i = 0; i < nsec; i++) {
1382 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1383 fTrSec[i]->GetLayer(pl)->Clear();
1389 //_____________________________________________________________________________
1390 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD *esd)
1393 // Creates seeds using clusters between position inner plane and outer plane
1396 const Double_t kMaxTheta = 1.0;
1397 const Double_t kMaxPhi = 2.0;
1399 const Double_t kRoad0y = 6.0; // Road for middle cluster
1400 const Double_t kRoad0z = 8.5; // Road for middle cluster
1402 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1403 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1405 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1406 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1407 const Int_t kMaxSeed = 3000;
1409 Int_t maxSec = AliTRDgeometry::kNsect;
1411 // Linear fitters in planes
1412 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1413 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1414 fitterTC.StoreData(kTRUE);
1415 fitterT2.StoreData(kTRUE);
1416 AliRieman rieman(1000); // Rieman fitter
1417 AliRieman rieman2(1000); // Rieman fitter
1419 // Find the maximal and minimal layer for the planes
1421 AliTRDpropagationLayer *reflayers[6];
1422 for (Int_t i = 0; i < 6; i++) {
1423 layers[i][0] = 10000;
1426 for (Int_t ns = 0; ns < maxSec; ns++) {
1427 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1428 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(ilayer));
1432 Int_t det = layer[0]->GetDetector();
1433 Int_t plane = fGeom->GetPlane(det);
1434 if (ilayer < layers[plane][0]) {
1435 layers[plane][0] = ilayer;
1437 if (ilayer > layers[plane][1]) {
1438 layers[plane][1] = ilayer;
1443 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1444 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1445 Double_t hL[6]; // Tilting angle
1446 Double_t xcl[6]; // X - position of reference cluster
1447 Double_t ycl[6]; // Y - position of reference cluster
1448 Double_t zcl[6]; // Z - position of reference cluster
1450 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1451 Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
1453 Double_t chi2R = 0.0;
1454 Double_t chi2Z = 0.0;
1455 Double_t chi2RF = 0.0;
1456 Double_t chi2ZF = 0.0;
1458 Int_t nclusters; // Total number of clusters
1459 for (Int_t i = 0; i < 6; i++) {
1467 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1468 AliTRDseed *seed[kMaxSeed];
1469 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1470 seed[iseed]= &pseed[iseed*6];
1472 AliTRDseed *cseed = seed[0];
1474 Double_t seedquality[kMaxSeed];
1475 Double_t seedquality2[kMaxSeed];
1476 Double_t seedparams[kMaxSeed][7];
1477 Int_t seedlayer[kMaxSeed];
1478 Int_t registered = 0;
1479 Int_t sort[kMaxSeed];
1484 for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
1485 //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
1487 registered = 0; // Reset registerd seed counter
1488 cseed = seed[registered];
1491 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1492 //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
1495 Int_t dseed = 5 + Int_t(iter) * 3;
1497 // Initialize seeding layers
1498 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1499 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1500 xcl[ilayer] = reflayers[ilayer]->GetX();
1503 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1504 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1505 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1506 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1507 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1509 Int_t maxn3 = layer3;
1510 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1512 AliTRDcluster *cl3 = layer3[icl3];
1516 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
1517 ycl[sLayer+3] = cl3->GetY();
1518 zcl[sLayer+3] = cl3->GetZ();
1519 Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1520 Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1521 Int_t maxn0 = layer0;
1523 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1525 AliTRDcluster *cl0 = layer0[icl0];
1529 if (cl3->IsUsed() && cl0->IsUsed()) {
1532 ycl[sLayer+0] = cl0->GetY();
1533 zcl[sLayer+0] = cl0->GetZ();
1534 if (ycl[sLayer+0] > yymax0) {
1537 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1538 if (TMath::Abs(tanphi) > kMaxPhi) {
1541 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1542 if (TMath::Abs(tantheta) > kMaxTheta) {
1545 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
1547 // Expected position in 1 layer
1548 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
1549 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
1550 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1551 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1552 Int_t maxn1 = layer1;
1554 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1556 AliTRDcluster *cl1 = layer1[icl1];
1561 if (cl3->IsUsed()) nusedCl++;
1562 if (cl0->IsUsed()) nusedCl++;
1563 if (cl1->IsUsed()) nusedCl++;
1567 ycl[sLayer+1] = cl1->GetY();
1568 zcl[sLayer+1] = cl1->GetZ();
1569 if (ycl[sLayer+1] > yymax1) {
1572 if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
1575 if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
1578 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
1580 Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
1581 Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
1582 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1586 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1587 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
1588 ycl[sLayer+2] = cl2->GetY();
1589 zcl[sLayer+2] = cl2->GetZ();
1590 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
1595 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1596 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1597 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1598 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1602 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1603 cseed[iLayer].Reset();
1608 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1609 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1610 chi2Z += (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer])
1611 * (cseed[sLayer+iLayer].GetZref(0)- zcl[sLayer+iLayer]);
1612 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1613 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1614 chi2R += (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer])
1615 * (cseed[sLayer+iLayer].GetYref(0)- ycl[sLayer+iLayer]);
1616 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1618 if (TMath::Sqrt(chi2R) > 1.0/iter) {
1621 if (TMath::Sqrt(chi2Z) > 7.0/iter) {
1625 Float_t minmax[2] = { -100.0, 100.0 };
1626 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1627 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
1628 + 1.0 - cseed[sLayer+iLayer].GetZref(0);
1629 if (max < minmax[1]) {
1632 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
1633 - 1.0 - cseed[sLayer+iLayer].GetZref(0);
1634 if (min > minmax[0]) {
1639 Bool_t isFake = kFALSE;
1640 if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
1643 if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
1646 if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
1650 if (AliTRDReconstructor::StreamLevel() > 0) {
1651 if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
1652 TTreeSRedirector &cstream = *fDebugStreamer;
1654 << "isFake=" << isFake
1660 << "X0=" << xcl[sLayer+0]
1661 << "X1=" << xcl[sLayer+1]
1662 << "X2=" << xcl[sLayer+2]
1663 << "X3=" << xcl[sLayer+3]
1664 << "Y2exp=" << y2exp
1665 << "Z2exp=" << z2exp
1666 << "Chi2R=" << chi2R
1667 << "Chi2Z=" << chi2Z
1668 << "Seed0.=" << &cseed[sLayer+0]
1669 << "Seed1.=" << &cseed[sLayer+1]
1670 << "Seed2.=" << &cseed[sLayer+2]
1671 << "Seed3.=" << &cseed[sLayer+3]
1672 << "Zmin=" << minmax[0]
1673 << "Zmax=" << minmax[1]
1678 ////////////////////////////////////////////////////////////////////////////////////
1682 ////////////////////////////////////////////////////////////////////////////////////
1688 Bool_t isOK = kTRUE;
1690 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1692 cseed[sLayer+jLayer].SetTilt(hL[sLayer+jLayer]);
1693 cseed[sLayer+jLayer].SetPadLength(padlength[sLayer+jLayer]);
1694 cseed[sLayer+jLayer].SetX0(xcl[sLayer+jLayer]);
1696 for (Int_t iter = 0; iter < 2; iter++) {
1699 // In iteration 0 we try only one pad-row
1700 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1702 AliTRDseed tseed = cseed[sLayer+jLayer];
1703 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1705 roadz = padlength[sLayer+jLayer];
1708 Float_t quality = 10000.0;
1710 for (Int_t iTime = 2; iTime < 20; iTime++) {
1712 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1713 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1714 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1717 // Try 2 pad-rows in second iteration
1718 zexp = tseed.GetZref(0) + tseed.GetZref(1) * dxlayer;
1719 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1720 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
1722 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1723 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
1727 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1728 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1732 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1734 tseed.SetIndexes(iTime,index);
1735 tseed.SetClusters(iTime,cl); // Register cluster
1736 tseed.SetX(iTime,dxlayer); // Register cluster
1737 tseed.SetY(iTime,cl->GetY()); // Register cluster
1738 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1744 // Count the number of clusters and distortions into quality
1745 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1746 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1747 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1748 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1749 if ((iter == 0) && tseed.IsOK()) {
1750 cseed[sLayer+jLayer] = tseed;
1756 if (tseed.IsOK() && (tquality < quality)) {
1757 cseed[sLayer+jLayer] = tseed;
1762 if (!cseed[sLayer+jLayer].IsOK()) {
1767 cseed[sLayer+jLayer].CookLabels();
1768 cseed[sLayer+jLayer].UpdateUsed();
1769 nusedCl += cseed[sLayer+jLayer].GetNUsed();
1781 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1782 if (cseed[sLayer+iLayer].IsOK()) {
1783 nclusters += cseed[sLayer+iLayer].GetN2();
1789 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1790 rieman.AddPoint(xcl[sLayer+iLayer]
1791 ,cseed[sLayer+iLayer].GetYfitR(0)
1792 ,cseed[sLayer+iLayer].GetZProb()
1801 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1802 cseed[sLayer+iLayer].SetYref(0,rieman.GetYat(xcl[sLayer+iLayer]));
1803 chi2R += (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0))
1804 * (cseed[sLayer+iLayer].GetYref(0) - cseed[sLayer+iLayer].GetYfitR(0));
1805 cseed[sLayer+iLayer].SetYref(1,rieman.GetDYat(xcl[sLayer+iLayer]));
1806 cseed[sLayer+iLayer].SetZref(0,rieman.GetZat(xcl[sLayer+iLayer]));
1807 chi2Z += (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz())
1808 * (cseed[sLayer+iLayer].GetZref(0) - cseed[sLayer+iLayer].GetMeanz());
1809 cseed[sLayer+iLayer].SetZref(1,rieman.GetDZat(xcl[sLayer+iLayer]));
1811 Double_t curv = rieman.GetC();
1816 Double_t sumda = TMath::Abs(cseed[sLayer+0].GetYfitR(1) - cseed[sLayer+0].GetYref(1))
1817 + TMath::Abs(cseed[sLayer+1].GetYfitR(1) - cseed[sLayer+1].GetYref(1))
1818 + TMath::Abs(cseed[sLayer+2].GetYfitR(1) - cseed[sLayer+2].GetYref(1))
1819 + TMath::Abs(cseed[sLayer+3].GetYfitR(1) - cseed[sLayer+3].GetYref(1));
1820 Double_t likea = TMath::Exp(-sumda*10.6);
1821 Double_t likechi2 = 0.0000000001;
1823 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1825 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1826 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1827 Double_t like = likea * likechi2 * likechi2z * likeN;
1828 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetYref(1) - 130.0*curv) * 1.9);
1829 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].GetZref(1)
1830 - cseed[sLayer+0].GetZref(0) / xcl[sLayer+0]) * 5.9);
1831 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1833 seedquality[registered] = like;
1834 seedlayer[registered] = sLayer;
1835 if (TMath::Log(0.000000000000001 + like) < -15) {
1838 AliTRDseed seedb[6];
1839 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1840 seedb[iLayer] = cseed[iLayer];
1843 ////////////////////////////////////////////////////////////////////////////////////
1845 // Full track fit part
1847 ////////////////////////////////////////////////////////////////////////////////////
1854 // Add new layers - avoid long extrapolation
1856 Int_t tLayer[2] = { 0, 0 };
1870 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1871 Int_t jLayer = tLayer[iLayer]; // Set tracking layer
1872 cseed[jLayer].Reset();
1873 cseed[jLayer].SetTilt(hL[jLayer]);
1874 cseed[jLayer].SetPadLength(padlength[jLayer]);
1875 cseed[jLayer].SetX0(xcl[jLayer]);
1876 // Get pad length and rough cluster
1877 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].GetYref(0)
1878 ,cseed[jLayer].GetZref(0)
1881 if (indexdummy <= 0) {
1884 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
1885 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
1887 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
1889 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1891 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1892 if ((jLayer == 0) && !(cseed[1].IsOK())) {
1893 continue; // break not allowed
1895 if ((jLayer == 5) && !(cseed[4].IsOK())) {
1896 continue; // break not allowed
1898 Float_t zexp = cseed[jLayer].GetZref(0);
1899 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
1901 for (Int_t iter = 0; iter < 2; iter++) {
1903 AliTRDseed tseed = cseed[jLayer];
1904 Float_t quality = 10000.0;
1906 for (Int_t iTime = 2; iTime < 20; iTime++) {
1907 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
1908 Double_t dxlayer = layer.GetX()-xcl[jLayer];
1909 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer;
1910 Float_t yroad = kRoad1y;
1911 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
1915 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1916 tseed.SetIndexes(iTime,index);
1917 tseed.SetClusters(iTime,cl); // Register cluster
1918 tseed.SetX(iTime,dxlayer); // Register cluster
1919 tseed.SetY(iTime,cl->GetY()); // Register cluster
1920 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
1925 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1926 Float_t tquality = (18.0 - tseed.GetN2())/2.0 + TMath::Abs(dangle) / 0.1
1927 + TMath::Abs(tseed.GetYfit(0) - tseed.GetYref(0)) / 0.2
1928 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1929 if (tquality < quality) {
1930 cseed[jLayer] = tseed;
1939 if ( cseed[jLayer].IsOK()) {
1940 cseed[jLayer].CookLabels();
1941 cseed[jLayer].UpdateUsed();
1942 nusedf += cseed[jLayer].GetNUsed();
1943 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
1949 AliTRDseed bseed[6];
1950 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1951 bseed[jLayer] = cseed[jLayer];
1953 Float_t lastquality = 10000.0;
1954 Float_t lastchi2 = 10000.0;
1955 Float_t chi2 = 1000.0;
1957 for (Int_t iter = 0; iter < 4; iter++) {
1959 // Sort tracklets according "quality", try to "improve" 4 worst
1960 Float_t sumquality = 0.0;
1961 Float_t squality[6];
1962 Int_t sortindexes[6];
1964 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1965 if (bseed[jLayer].IsOK()) {
1966 AliTRDseed &tseed = bseed[jLayer];
1967 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
1968 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
1969 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0 + TMath::Abs(dangle) / 0.1
1970 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
1971 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
1972 squality[jLayer] = tquality;
1975 squality[jLayer] = -1.0;
1977 sumquality +=squality[jLayer];
1980 if ((sumquality >= lastquality) ||
1981 (chi2 > lastchi2)) {
1984 lastquality = sumquality;
1987 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1988 cseed[jLayer] = bseed[jLayer];
1991 TMath::Sort(6,squality,sortindexes,kFALSE);
1993 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
1995 Int_t bLayer = sortindexes[jLayer];
1996 AliTRDseed tseed = bseed[bLayer];
1998 for (Int_t iTime = 2; iTime < 20; iTime++) {
2000 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
2001 Double_t dxlayer = layer.GetX() - xcl[bLayer];
2002 Double_t zexp = tseed.GetZref(0);
2003 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2004 Float_t roadz = padlength[bLayer] + 1;
2005 if (TMath::Abs(tseed.GetZProb() - zexp) > 0.5*padlength[bLayer]) {
2006 roadz = padlength[bLayer] * 0.5;
2008 if (tseed.GetZfit(1)*tseed.GetZref(1) < 0.0) {
2009 roadz = padlength[bLayer] * 0.5;
2011 if (TMath::Abs(tseed.GetZProb() - zexp) < 0.1*padlength[bLayer]) {
2012 zexp = tseed.GetZProb();
2013 roadz = padlength[bLayer] * 0.5;
2016 Double_t yexp = tseed.GetYref(0) + tseed.GetYref(1) * dxlayer - zcor;
2017 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
2021 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2023 tseed.SetIndexes(iTime,index);
2024 tseed.SetClusters(iTime,cl); // Register cluster
2025 tseed.SetX(iTime,dxlayer); // Register cluster
2026 tseed.SetY(iTime,cl->GetY()); // Register cluster
2027 tseed.SetZ(iTime,cl->GetZ()); // Register cluster
2033 Float_t dangle = tseed.GetYfit(1) - tseed.GetYref(1);
2034 Double_t zcor = tseed.GetTilt() * (tseed.GetZProb() - tseed.GetZref(0));
2035 Float_t tquality = (18.0 - tseed.GetN2()) / 2.0
2036 + TMath::Abs(dangle) / 0.1
2037 + TMath::Abs(tseed.GetYfit(0) - (tseed.GetYref(0) - zcor)) / 0.2
2038 + 2.0 * TMath::Abs(tseed.GetMeanz() - tseed.GetZref(0)) / padlength[jLayer];
2039 if (tquality<squality[bLayer]) {
2040 bseed[bLayer] = tseed;
2046 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
2053 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2054 if (TMath::Abs(cseed[iLayer].GetYref(0) / cseed[iLayer].GetX0()) < 0.15) {
2057 if (cseed[iLayer].IsOK()) {
2058 nclusters += cseed[iLayer].GetN2();
2066 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2067 if (cseed[iLayer].IsOK()) {
2068 rieman.AddPoint(xcl[iLayer]
2069 ,cseed[iLayer].GetYfitR(0)
2070 ,cseed[iLayer].GetZProb()
2079 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2080 if (cseed[iLayer].IsOK()) {
2081 cseed[iLayer].SetYref(0,rieman.GetYat(xcl[iLayer]));
2082 chi2RF += (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0))
2083 * (cseed[iLayer].GetYref(0) - cseed[iLayer].GetYfitR(0));
2084 cseed[iLayer].SetYref(1,rieman.GetDYat(xcl[iLayer]));
2085 cseed[iLayer].SetZref(0,rieman.GetZat(xcl[iLayer]));
2086 chi2ZF += (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz())
2087 * (cseed[iLayer].GetZref(0) - cseed[iLayer].GetMeanz());
2088 cseed[iLayer].SetZref(1,rieman.GetDZat(xcl[iLayer]));
2091 chi2RF /= TMath::Max((nlayers - 3.0),1.0);
2092 chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
2093 curv = rieman.GetC();
2095 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
2096 Double_t dzmf = rieman.GetDZat(xref2);
2097 Double_t zmf = rieman.GetZat(xref2);
2103 fitterTC.ClearPoints();
2104 fitterT2.ClearPoints();
2107 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2109 if (!cseed[iLayer].IsOK()) {
2113 for (Int_t itime = 0; itime < 25; itime++) {
2115 if (!cseed[iLayer].IsUsable(itime)) {
2118 // X relative to the middle chamber
2119 Double_t x = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0() - xref2;
2120 Double_t y = cseed[iLayer].GetY(itime);
2121 Double_t z = cseed[iLayer].GetZ(itime);
2122 // ExB correction to the correction
2126 Double_t x2 = cseed[iLayer].GetX(itime) + cseed[iLayer].GetX0();
2127 Double_t t = 1.0 / (x2*x2 + y*y);
2129 uvt[0] = 2.0 * x2 * uvt[1]; // u
2130 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
2131 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
2132 uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
2133 Double_t error = 2.0 * 0.2 * uvt[1];
2134 fitterT2.AddPoint(uvt,uvt[4],error);
2137 // Constrained rieman
2139 z = cseed[iLayer].GetZ(itime);
2140 uvt[0] = 2.0 * x2 * t; // u
2141 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
2142 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
2143 fitterTC.AddPoint(uvt,uvt[2],error);
2144 rieman2.AddPoint(x2,y,z,1,10);
2154 Double_t rpolz0 = fitterT2.GetParameter(3);
2155 Double_t rpolz1 = fitterT2.GetParameter(4);
2158 // Linear fitter - not possible to make boundaries
2159 // Do not accept non possible z and dzdx combinations
2161 Bool_t acceptablez = kTRUE;
2162 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2163 if (cseed[iLayer].IsOK()) {
2164 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2165 if (TMath::Abs(cseed[iLayer].GetZProb() - zT2) > padlength[iLayer] * 0.5 + 1.0) {
2166 acceptablez = kFALSE;
2171 fitterT2.FixParameter(3,zmf);
2172 fitterT2.FixParameter(4,dzmf);
2174 fitterT2.ReleaseParameter(3);
2175 fitterT2.ReleaseParameter(4);
2176 rpolz0 = fitterT2.GetParameter(3);
2177 rpolz1 = fitterT2.GetParameter(4);
2180 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2181 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2182 Double_t polz1c = fitterTC.GetParameter(2);
2183 Double_t polz0c = polz1c * xref2;
2184 Double_t aC = fitterTC.GetParameter(0);
2185 Double_t bC = fitterTC.GetParameter(1);
2186 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2187 Double_t aR = fitterT2.GetParameter(0);
2188 Double_t bR = fitterT2.GetParameter(1);
2189 Double_t dR = fitterT2.GetParameter(2);
2190 Double_t cR = 1.0 + bR*bR - dR*aR;
2193 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2194 cR = aR / TMath::Sqrt(cR);
2197 Double_t chi2ZT2 = 0.0;
2198 Double_t chi2ZTC = 0.0;
2199 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2200 if (cseed[iLayer].IsOK()) {
2201 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2202 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2203 chi2ZT2 += TMath::Abs(cseed[iLayer].GetMeanz() - zT2);
2204 chi2ZTC += TMath::Abs(cseed[iLayer].GetMeanz() - zTC);
2207 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2208 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2210 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2211 Float_t sumdaf = 0.0;
2212 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2213 if (cseed[iLayer].IsOK()) {
2214 sumdaf += TMath::Abs((cseed[iLayer].GetYfit(1) - cseed[iLayer].GetYref(1))
2215 / cseed[iLayer].GetSigmaY2());
2218 sumdaf /= Float_t (nlayers - 2.0);
2221 // Likelihoods for full track
2223 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2224 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2225 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2226 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2227 seedquality2[registered] = likezf * likechi2TR * likeaf;
2229 // Still needed ????
2230 // Bool_t isGold = kFALSE;
2232 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2233 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2234 // if (isGold &&nusedf<10){
2235 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2236 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2237 // seed[index][jLayer].UseClusters(); //sign gold
2242 if (!cseed[0].IsOK()) {
2244 if (!cseed[1].IsOK()) {
2248 seedparams[registered][0] = cseed[index0].GetX0();
2249 seedparams[registered][1] = cseed[index0].GetYref(0);
2250 seedparams[registered][2] = cseed[index0].GetZref(0);
2251 seedparams[registered][5] = cR;
2252 seedparams[registered][3] = cseed[index0].GetX0() * cR - TMath::Sin(TMath::ATan(cseed[0].GetYref(1)));
2253 seedparams[registered][4] = cseed[index0].GetZref(1)
2254 / TMath::Sqrt(1.0 + cseed[index0].GetYref(1) * cseed[index0].GetYref(1));
2255 seedparams[registered][6] = ns;
2260 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2261 if (!cseed[iLayer].IsOK()) {
2264 if (cseed[iLayer].GetLabels(0) >= 0) {
2265 labels[nlab] = cseed[iLayer].GetLabels(0);
2268 if (cseed[iLayer].GetLabels(1) >= 0) {
2269 labels[nlab] = cseed[iLayer].GetLabels(1);
2273 Freq(nlab,labels,outlab,kFALSE);
2274 Int_t label = outlab[0];
2275 Int_t frequency = outlab[1];
2276 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2277 cseed[iLayer].SetFreq(frequency);
2278 cseed[iLayer].SetC(cR);
2279 cseed[iLayer].SetCC(cC);
2280 cseed[iLayer].SetChi2(chi2TR);
2281 cseed[iLayer].SetChi2Z(chi2ZF);
2285 if (1 || (!isFake)) {
2286 Float_t zvertex = GetZ();
2287 TTreeSRedirector &cstream = *fDebugStreamer;
2288 if (AliTRDReconstructor::StreamLevel() > 0) {
2290 << "isFake=" << isFake
2291 << "Vertex=" << zvertex
2292 << "Rieman2.=" << &rieman2
2293 << "Rieman.=" << &rieman
2301 << "Chi2R=" << chi2R
2302 << "Chi2Z=" << chi2Z
2303 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2304 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2305 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2306 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2307 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2308 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2309 << "C=" << curv // Non constrained - no tilt correction
2310 << "DR=" << dR // DR parameter - tilt correction
2311 << "DCA=" << dca // DCA - tilt correction
2312 << "CR=" << cR // Non constrained curvature - tilt correction
2313 << "CC=" << cC // Constrained curvature
2314 << "Polz0=" << polz0c
2315 << "Polz1=" << polz1c
2316 << "RPolz0=" << rpolz0
2317 << "RPolz1=" << rpolz1
2318 << "Ncl=" << nclusters
2319 << "Nlayers=" << nlayers
2320 << "NUsedS=" << nusedCl
2321 << "NUsed=" << nusedf
2322 << "Findable=" << findable
2324 << "LikePrim=" << likePrim
2325 << "Likechi2C=" << likechi2C
2326 << "Likechi2TR=" << likechi2TR
2327 << "Likezf=" << likezf
2328 << "LikeF=" << seedquality2[registered]
2329 << "S0.=" << &cseed[0]
2330 << "S1.=" << &cseed[1]
2331 << "S2.=" << &cseed[2]
2332 << "S3.=" << &cseed[3]
2333 << "S4.=" << &cseed[4]
2334 << "S5.=" << &cseed[5]
2335 << "SB0.=" << &seedb[0]
2336 << "SB1.=" << &seedb[1]
2337 << "SB2.=" << &seedb[2]
2338 << "SB3.=" << &seedb[3]
2339 << "SB4.=" << &seedb[4]
2340 << "SB5.=" << &seedb[5]
2341 << "Label=" << label
2342 << "Freq=" << frequency
2343 << "sLayer=" << sLayer
2348 if (registered<kMaxSeed - 1) {
2350 cseed = seed[registered];
2353 } // End of loop over layer 1
2355 } // End of loop over layer 0
2357 } // End of loop over layer 3
2359 } // End of loop over seeding time bins
2365 TMath::Sort(registered,seedquality2,sort,kTRUE);
2366 Bool_t signedseed[kMaxSeed];
2367 for (Int_t i = 0; i < registered; i++) {
2368 signedseed[i] = kFALSE;
2371 for (Int_t iter = 0; iter < 5; iter++) {
2373 for (Int_t iseed = 0; iseed < registered; iseed++) {
2375 Int_t index = sort[iseed];
2376 if (signedseed[index]) {
2379 Int_t labelsall[1000];
2380 Int_t nlabelsall = 0;
2381 Int_t naccepted = 0;;
2382 Int_t sLayer = seedlayer[index];
2388 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2390 if (TMath::Abs(seed[index][jLayer].GetYref(0) / xcl[jLayer]) < 0.15) {
2393 if (seed[index][jLayer].IsOK()) {
2394 seed[index][jLayer].UpdateUsed();
2395 ncl +=seed[index][jLayer].GetN2();
2396 nused +=seed[index][jLayer].GetNUsed();
2399 for (Int_t itime = 0; itime < 25; itime++) {
2400 if (seed[index][jLayer].IsUsable(itime)) {
2402 for (Int_t ilab = 0; ilab < 3; ilab++) {
2403 Int_t tindex = seed[index][jLayer].GetClusters(itime)->GetLabel(ilab);
2405 labelsall[nlabelsall] = tindex;
2423 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2429 if (nlayers < findable) {
2432 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
2438 if ((nlayers == findable) ||
2442 if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
2448 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2454 if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
2459 signedseed[index] = kTRUE;
2464 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2465 if (seed[index][iLayer].IsOK()) {
2466 if (seed[index][iLayer].GetLabels(0) >= 0) {
2467 labels[nlab] = seed[index][iLayer].GetLabels(0);
2470 if (seed[index][iLayer].GetLabels(1) >= 0) {
2471 labels[nlab] = seed[index][iLayer].GetLabels(1);
2476 Freq(nlab,labels,outlab,kFALSE);
2477 Int_t label = outlab[0];
2478 Int_t frequency = outlab[1];
2479 Freq(nlabelsall,labelsall,outlab,kFALSE);
2480 Int_t label1 = outlab[0];
2481 Int_t label2 = outlab[2];
2482 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2483 Float_t ratio = Float_t(nused) / Float_t(ncl);
2485 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2486 if ((seed[index][jLayer].IsOK()) &&
2487 (TMath::Abs(seed[index][jLayer].GetYfit(1) - seed[index][jLayer].GetYfit(1)) < 0.2)) {
2488 seed[index][jLayer].UseClusters(); // Sign gold
2493 Int_t eventNr = esd->GetEventNumber();
2494 TTreeSRedirector &cstream = *fDebugStreamer;
2499 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2505 AliESDtrack esdtrack;
2506 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2507 esdtrack.SetLabel(label);
2508 esd->AddTrack(&esdtrack);
2509 TTreeSRedirector &cstream = *fDebugStreamer;
2510 if (AliTRDReconstructor::StreamLevel() > 0) {
2512 << "EventNr=" << eventNr
2513 << "ESD.=" << &esdtrack
2515 << "trdback.=" << track
2520 if (AliTRDReconstructor::StreamLevel() > 0) {
2523 << "Track.=" << track
2524 << "Like=" << seedquality[index]
2525 << "LikeF=" << seedquality2[index]
2526 << "S0.=" << &seed[index][0]
2527 << "S1.=" << &seed[index][1]
2528 << "S2.=" << &seed[index][2]
2529 << "S3.=" << &seed[index][3]
2530 << "S4.=" << &seed[index][4]
2531 << "S5.=" << &seed[index][5]
2532 << "Label=" << label
2533 << "Label1=" << label1
2534 << "Label2=" << label2
2535 << "FakeRatio=" << fakeratio
2536 << "Freq=" << frequency
2538 << "Nlayers=" << nlayers
2539 << "Findable=" << findable
2540 << "NUsed=" << nused
2541 << "sLayer=" << sLayer
2542 << "EventNr=" << eventNr
2550 } // End of loop over sectors
2556 //_____________________________________________________________________________
2557 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *clusterTree) const
2560 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2561 // from the file. The names of the cluster tree and branches
2562 // should match the ones used in AliTRDclusterizer::WriteClusters()
2565 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2566 TObjArray *clusterArray = new TObjArray(nsize+1000);
2568 TBranch *branch = clusterTree->GetBranch("TRDcluster");
2570 AliError("Can't get the branch !");
2573 branch->SetAddress(&clusterArray);
2575 // Loop through all entries in the tree
2576 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2578 AliTRDcluster *c = 0;
2579 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2582 nbytes += clusterTree->GetEvent(iEntry);
2584 // Get the number of points in the detector
2585 Int_t nCluster = clusterArray->GetEntriesFast();
2587 // Loop through all TRD digits
2588 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2589 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2590 AliTRDcluster *co = c;
2592 clusterArray->RemoveAt(iCluster);
2597 delete clusterArray;
2603 //_____________________________________________________________________________
2604 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2607 // Get track space point with index i
2608 // Origin: C.Cheshkov
2611 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2612 Int_t idet = cl->GetDetector();
2613 Int_t isector = fGeom->GetSector(idet);
2614 Int_t ichamber = fGeom->GetChamber(idet);
2615 Int_t iplan = fGeom->GetPlane(idet);
2617 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2618 local[1] = cl->GetY();
2619 local[2] = cl->GetZ();
2621 fGeom->RotateBack(idet,local,global);
2622 p.SetXYZ(global[0],global[1],global[2]);
2623 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
2626 iLayer = AliAlignObj::kTRD1;
2629 iLayer = AliAlignObj::kTRD2;
2632 iLayer = AliAlignObj::kTRD3;
2635 iLayer = AliAlignObj::kTRD4;
2638 iLayer = AliAlignObj::kTRD5;
2641 iLayer = AliAlignObj::kTRD6;
2644 Int_t modId = isector * fGeom->Ncham() + ichamber;
2645 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
2646 p.SetVolumeID(volid);
2652 //_____________________________________________________________________________
2653 void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
2656 // This cooks a label. Mmmmh, smells good...
2659 Int_t label = 123456789;
2663 Int_t ncl = pt->GetNumberOfClusters();
2665 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2669 Int_t **s = new Int_t* [kRange];
2670 for (i = 0; i < kRange; i++) {
2671 s[i] = new Int_t[2];
2673 for (i = 0; i < kRange; i++) {
2682 for (i = 0; i < ncl; i++) {
2683 index = pt->GetClusterIndex(i);
2684 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2690 for (i = 0; i < ncl; i++) {
2691 index = pt->GetClusterIndex(i);
2692 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2693 for (Int_t k = 0; k < 3; k++) {
2694 label = c->GetLabel(k);
2695 labelAdded = kFALSE;
2698 while ((!labelAdded) && (j < kRange)) {
2699 if ((s[j][0] == label) ||
2702 s[j][1] = s[j][1] + 1;
2714 for (i = 0; i < kRange; i++) {
2715 if (s[i][1] > max) {
2721 for (i = 0; i < kRange; i++) {
2727 if ((1.0 - Float_t(max)/ncl) > wrong) {
2731 pt->SetLabel(label);
2735 //_____________________________________________________________________________
2736 void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
2739 // Use clusters, but don't abuse them!
2742 const Float_t kmaxchi2 = 18;
2743 const Float_t kmincl = 10;
2745 AliTRDtrack *track = (AliTRDtrack *) t;
2747 Int_t ncl = t->GetNumberOfClusters();
2748 for (Int_t i = from; i < ncl; i++) {
2749 Int_t index = t->GetClusterIndex(i);
2750 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2751 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2752 if (track->fTracklets[iplane].GetChi2() > kmaxchi2) {
2755 if (track->fTracklets[iplane].GetN() < kmincl) {
2758 if (!(c->IsUsed())) {
2765 //_____________________________________________________________________________
2766 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2769 // Parametrised "expected" error of the cluster reconstruction in Y
2772 Double_t s = 0.08 * 0.08;
2777 //_____________________________________________________________________________
2778 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2781 // Parametrised "expected" error of the cluster reconstruction in Z
2784 Double_t s = 9.0 * 9.0 / 12.0;
2789 //_____________________________________________________________________________
2790 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2793 // Returns radial position which corresponds to time bin <localTB>
2794 // in tracking sector <sector> and plane <plane>
2797 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2798 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2800 return fTrSec[sector]->GetLayer(pl)->GetX();
2804 //_____________________________________________________________________________
2805 AliTRDtracker::AliTRDpropagationLayer
2806 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2807 , Double_t radLength, Int_t tbIndex, Int_t plane)
2816 ,fTimeBinIndex(tbIndex)
2829 // AliTRDpropagationLayer constructor
2832 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2837 if (fTimeBinIndex >= 0) {
2838 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2839 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2842 for (Int_t i = 0; i < 5; i++) {
2843 fIsHole[i] = kFALSE;
2848 //_____________________________________________________________________________
2849 void AliTRDtracker::AliTRDpropagationLayer
2850 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2851 , Double_t radLength, Double_t Yc, Double_t Zc)
2854 // Sets hole in the layer
2863 fHoleX0 = radLength;
2867 //_____________________________________________________________________________
2868 AliTRDtracker::AliTRDtrackingSector
2869 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
2875 // AliTRDtrackingSector Constructor
2878 AliTRDpadPlane *padPlane = 0;
2879 AliTRDpropagationLayer *ppl = 0;
2881 // Get holes description from geometry
2882 Bool_t holes[AliTRDgeometry::kNcham];
2883 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
2884 holes[icham] = fGeom->IsHole(0,icham,gs);
2887 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
2888 fTimeBinIndex[i] = -1;
2896 // Add layers for each of the planes
2897 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2898 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2900 const Int_t kNchambers = AliTRDgeometry::Ncham();
2903 Double_t ymaxsensitive = 0;
2904 Double_t *zc = new Double_t[kNchambers];
2905 Double_t *zmax = new Double_t[kNchambers];
2906 Double_t *zmaxsensitive = new Double_t[kNchambers];
2908 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
2910 AliErrorGeneral("AliTRDtrackingSector::Ctor"
2911 ,"Could not get common parameters\n");
2915 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
2917 ymax = fGeom->GetChamberWidth(plane) / 2.0;
2918 padPlane = commonParam->GetPadPlane(plane,0);
2919 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
2921 for (Int_t ch = 0; ch < kNchambers; ch++) {
2922 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
2923 Float_t pad = padPlane->GetRowSize(1);
2924 Float_t row0 = commonParam->GetRow0(plane,ch,0);
2925 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
2926 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
2927 zc[ch] = -(pad * nPads) / 2.0 + row0;
2930 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
2931 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
2932 rho = 0.00295 * 0.85; //????
2935 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
2936 //Double_t xbottom = x0 - dxDrift;
2937 //Double_t xtop = x0 + dxAmp;
2939 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2940 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
2942 Double_t xlayer = iTime * dx - dxAmp;
2943 //if (xlayer<0) xlayer = dxAmp / 2.0;
2946 tbIndex = CookTimeBinIndex(plane,iTime);
2947 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
2948 ppl->SetYmax(ymax,ymaxsensitive);
2949 ppl->SetZ(zc,zmax,zmaxsensitive);
2950 ppl->SetHoles(holes);
2961 delete [] zmaxsensitive;
2965 //_____________________________________________________________________________
2966 AliTRDtracker::AliTRDtrackingSector
2967 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
2978 //_____________________________________________________________________________
2979 Int_t AliTRDtracker::AliTRDtrackingSector
2980 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
2983 // depending on the digitization parameters calculates "global"
2984 // time bin index for timebin <localTB> in plane <plane>
2988 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2989 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
3001 //_____________________________________________________________________________
3002 void AliTRDtracker::AliTRDtrackingSector
3003 ::MapTimeBinLayers()
3006 // For all sensitive time bins sets corresponding layer index
3007 // in the array fTimeBins
3012 for (Int_t i = 0; i < fN; i++) {
3014 index = fLayers[i]->GetTimeBinIndex();
3019 if (index >= (Int_t) kMaxTimeBinIndex) {
3020 //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
3021 // ,index,kMaxTimeBinIndex-1));
3025 fTimeBinIndex[index] = i;
3031 //_____________________________________________________________________________
3032 Int_t AliTRDtracker::AliTRDtrackingSector
3033 ::GetLayerNumber(Double_t x) const
3036 // Returns the number of time bin which in radial position is closest to <x>
3039 if (x >= fLayers[fN-1]->GetX()) {
3042 if (x <= fLayers[ 0]->GetX()) {
3048 Int_t m = (b + e) / 2;
3050 for ( ; b < e; m = (b + e) / 2) {
3051 if (x > fLayers[m]->GetX()) {
3059 if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
3068 //_____________________________________________________________________________
3069 Int_t AliTRDtracker::AliTRDtrackingSector
3070 ::GetInnerTimeBin() const
3073 // Returns number of the innermost SENSITIVE propagation layer
3076 return GetLayerNumber(0);
3080 //_____________________________________________________________________________
3081 Int_t AliTRDtracker::AliTRDtrackingSector
3082 ::GetOuterTimeBin() const
3085 // Returns number of the outermost SENSITIVE time bin
3088 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3092 //_____________________________________________________________________________
3093 Int_t AliTRDtracker::AliTRDtrackingSector
3094 ::GetNumberOfTimeBins() const
3097 // Returns number of SENSITIVE time bins
3103 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
3104 layer = GetLayerNumber(tb);
3114 //_____________________________________________________________________________
3115 void AliTRDtracker::AliTRDtrackingSector
3116 ::InsertLayer(AliTRDpropagationLayer *pl)
3119 // Insert layer <pl> in fLayers array.
3120 // Layers are sorted according to X coordinate.
3123 if (fN == ((Int_t) kMaxLayersPerSector)) {
3124 //AliWarning("Too many layers !\n");
3133 Int_t i = Find(pl->GetX());
3135 memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3142 //_____________________________________________________________________________
3143 Int_t AliTRDtracker::AliTRDtrackingSector
3144 ::Find(Double_t x) const
3147 // Returns index of the propagation layer nearest to X
3150 if (x <= fLayers[0]->GetX()) {
3154 if (x > fLayers[fN-1]->GetX()) {
3160 Int_t m = (b + e) / 2;
3162 for (; b < e; m = (b + e) / 2) {
3163 if (x > fLayers[m]->GetX()) {
3175 //_____________________________________________________________________________
3176 void AliTRDtracker::AliTRDpropagationLayer
3177 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3180 // set centers and the width of sectors
3183 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3184 fZc[icham] = center[icham];
3185 fZmax[icham] = w[icham];
3186 fZmaxSensitive[icham] = wsensitive[icham];
3191 //_____________________________________________________________________________
3192 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3195 // set centers and the width of sectors
3200 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3201 fIsHole[icham] = holes[icham];
3209 //_____________________________________________________________________________
3210 void AliTRDtracker::AliTRDpropagationLayer
3211 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3214 // Insert cluster in cluster array.
3215 // Clusters are sorted according to Y coordinate.
3218 if (fTimeBinIndex < 0) {
3219 //AliWarning("Attempt to insert cluster into non-sensitive time bin!\n");
3223 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3224 //AliWarning("Too many clusters !\n");
3230 fClusters[fN++] = c;
3234 Int_t i = Find(c->GetY());
3235 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3236 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3243 //_____________________________________________________________________________
3244 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3247 // Returns index of the cluster nearest in Y
3253 if (y <= fClusters[0]->GetY()) {
3256 if (y > fClusters[fN-1]->GetY()) {
3262 Int_t m = (b + e) / 2;
3264 for ( ; b < e; m = (b + e) / 2) {
3265 if (y > fClusters[m]->GetY()) {
3277 //_____________________________________________________________________________
3278 Int_t AliTRDtracker::AliTRDpropagationLayer
3279 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3280 , Float_t maxroadz) const
3283 // Returns index of the cluster nearest to the given y,z
3288 Float_t mindist = maxroad;
3290 for (Int_t i = Find(y-maxroad); i < maxn; i++) {
3291 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3292 Float_t ycl = c->GetY();
3293 if (ycl > (y + maxroad)) {
3296 if (TMath::Abs(c->GetZ() - z) > maxroadz) {
3299 if (TMath::Abs(ycl - y) < mindist) {
3300 mindist = TMath::Abs(ycl - y);
3309 //_____________________________________________________________________________
3310 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
3313 // Returns correction factor for tilted pads geometry
3316 Int_t det = c->GetDetector();
3317 Int_t plane = fGeom->GetPlane(det);
3318 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
3319 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3329 //_____________________________________________________________________________
3330 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack &TRDtrack)
3333 // This is setting fdEdxPlane and fTimBinPlane
3334 // Sums up the charge in each plane for track TRDtrack and also get the
3335 // Time bin for Max. Cluster
3336 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
3339 Double_t clscharge[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3340 Double_t maxclscharge[AliESDtrack::kNPlane];
3341 Int_t nCluster[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3342 Int_t timebin[AliESDtrack::kNPlane];
3344 // Initialization of cluster charge per plane.
3345 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3346 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3347 clscharge[iPlane][iSlice] = 0.0;
3348 nCluster[iPlane][iSlice] = 0;
3352 // Initialization of cluster charge per plane.
3353 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3354 timebin[iPlane] = -1;
3355 maxclscharge[iPlane] = 0.0;
3358 // Loop through all clusters associated to track TRDtrack
3359 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
3360 for (Int_t iClus = 0; iClus < nClus; iClus++) {
3361 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
3362 Int_t index = TRDtrack.GetClusterIndex(iClus);
3363 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
3367 Int_t tb = pTRDcluster->GetLocalTimeBin();
3371 Int_t detector = pTRDcluster->GetDetector();
3372 Int_t iPlane = fGeom->GetPlane(detector);
3373 Int_t iSlice = tb * AliESDtrack::kNSlice / AliTRDtrack::kNtimeBins;
3374 clscharge[iPlane][iSlice] = clscharge[iPlane][iSlice] + charge;
3375 if (charge > maxclscharge[iPlane]) {
3376 maxclscharge[iPlane] = charge;
3377 timebin[iPlane] = tb;
3379 nCluster[iPlane][iSlice]++;
3380 } // End of loop over cluster
3382 // Setting the fdEdxPlane and fTimBinPlane variabales
3383 Double_t totalCharge = 0.0;
3385 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3386 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3387 if (nCluster[iPlane][iSlice]) {
3388 clscharge[iPlane][iSlice] /= nCluster[iPlane][iSlice];
3390 TRDtrack.SetPIDsignals(clscharge[iPlane][iSlice],iPlane,iSlice);
3391 totalCharge = totalCharge+clscharge[iPlane][iSlice];
3393 TRDtrack.SetPIDTimBin(timebin[iPlane],iPlane);
3396 // Still needed ????
3398 // Int_t nc=TRDtrack.GetNumberOfClusters();
3400 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
3402 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3403 // TRDtrack.SetPIDsignals(dedx, iPlane);
3404 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
3409 //_____________________________________________________________________________
3410 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3411 , AliTRDtrack *track
3412 , Int_t *clusters, AliTRDtracklet &tracklet)
3416 // Try to find nearest clusters to the track in timebins from t0 to t1
3418 // Correction coeficients - depend on TRD parameters - to be changed accordingly
3424 Double_t xmean = 0.0; // Reference x
3425 Double_t dz[10][100];
3426 Double_t dy[10][100];
3430 Int_t indexes[10][100]; // Indexes of the clusters in the road
3431 Int_t best[10][100]; // Index of best matching cluster
3432 AliTRDcluster *cl[10][100]; // Pointers to the clusters in the road
3434 for (Int_t it = 0; it < 100; it++) {
3441 for (Int_t ih = 0; ih < 10;ih++) {
3442 indexes[ih][it] = -2; // Reset indexes1
3444 dz[ih][it] = -100.0;
3445 dy[ih][it] = -100.0;
3450 Double_t x0 = track->GetX();
3451 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3456 Int_t detector = -1;
3457 Float_t padlength = 0.0;
3458 AliTRDtrack track2(* track);
3459 Float_t snpy = track->GetSnp();
3460 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3465 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
3466 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3467 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3472 for (Int_t it = 0; it < t1-t0; it++) {
3474 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3475 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
3477 continue; // No indexes1
3480 Int_t maxn = timeBin;
3481 x[it] = timeBin.GetX();
3482 track2.PropagateTo(x[it]);
3483 yt[it] = track2.GetY();
3484 zt[it] = track2.GetZ();
3486 Double_t y = yt[it];
3487 Double_t z = zt[it];
3488 Double_t chi2 = 1000000.0;
3492 // Find 2 nearest cluster at given time bin
3494 for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
3496 AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
3497 h01 = GetTiltFactor(c);
3499 Int_t det = c->GetDetector();
3500 plane = fGeom->GetPlane(det);
3501 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3503 //if (c->GetLocalTimeBin()==0) continue;
3504 if (c->GetY() > (y + road)) {
3507 if ((c->GetZ() - z) * (c->GetZ() - z) > (12.0 * sz2)) {
3511 Double_t dist = TMath::Abs(c->GetZ() - z);
3512 if (dist > (0.5 * padlength + 6.0 * sigmaz)) {
3513 continue; // 6 sigma boundary cut
3515 Double_t cost = 0.0;
3516 // Sigma boundary cost function
3517 if (dist> (0.5 * padlength - sigmaz)){
3518 cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
3520 cost = (cost + 1.0) * (cost + 1.0);
3526 //Int_t label = TMath::Abs(track->GetLabel());
3527 //if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
3528 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3531 if (chi2 > maxChi2[1]) {
3534 detector = c->GetDetector();
3535 // Store the clusters in the road
3536 for (Int_t ih = 2; ih < 9; ih++) {
3537 if (cl[ih][it] == 0) {
3539 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3544 if (chi2 < maxChi2[0]) {
3545 maxChi2[1] = maxChi2[0];
3547 indexes[1][it] = indexes[0][it];
3548 cl[1][it] = cl[0][it];
3549 indexes[0][it] = timeBin.GetIndex(i);
3555 indexes[1][it] = timeBin.GetIndex(i);
3569 xmean /= Float_t(nfound); // Middle x
3570 track2.PropagateTo(xmean); // Propagate track to the center
3573 // Choose one of the variants
3578 Double_t sumdy = 0.0;
3579 Double_t sumdy2 = 0.0;
3580 Double_t sumx = 0.0;
3581 Double_t sumxy = 0.0;
3582 Double_t sumx2 = 0.0;
3583 Double_t mpads = 0.0;
3589 Double_t moffset[10]; // Mean offset
3590 Double_t mean[10]; // Mean value
3591 Double_t angle[10]; // Angle
3593 Double_t smoffset[10]; // Sigma of mean offset
3594 Double_t smean[10]; // Sigma of mean value
3595 Double_t sangle[10]; // Sigma of angle
3596 Double_t smeanangle[10]; // Correlation
3598 Double_t sigmas[10];
3599 Double_t tchi2s[10]; // Chi2s for tracklet
3601 for (Int_t it = 0; it < 10; it++) {
3607 moffset[it] = 0.0; // Mean offset
3608 mean[it] = 0.0; // Mean value
3609 angle[it] = 0.0; // Angle
3611 smoffset[it] = 1.0e10; // Sigma of mean offset
3612 smean[it] = 1.0e10; // Sigma of mean value
3613 sangle[it] = 1.0e10; // Sigma of angle
3614 smeanangle[it] = 0.0; // Correlation
3616 sigmas[it] = 1.0e10;
3617 tchi2s[it] = 1.0e10; // Chi2s for tracklet
3624 for (Int_t it = 0; it < t1 - t0; it++) {
3628 for (Int_t dt = -3; dt <= 3; dt++) {
3632 if (it+dt > t1-t0) {
3635 if (!cl[0][it+dt]) {
3638 zmean[it] += cl[0][it+dt]->GetZ();
3641 zmean[it] /= nmean[it];
3644 for (Int_t it = 0; it < t1 - t0; it++) {
3648 for (Int_t ih = 0; ih < 10; ih++) {
3649 dz[ih][it] = -100.0;
3650 dy[ih][it] = -100.0;
3654 Double_t xcluster = cl[ih][it]->GetX();
3657 track2.GetProlongation(xcluster,ytrack,ztrack );
3658 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
3659 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
3666 if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
3668 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
3676 // Iterative choice of "best path"
3678 Int_t label = TMath::Abs(track->GetLabel());
3681 for (Int_t iter = 0; iter < 9; iter++) {
3696 for (Int_t it = 0; it < t1 - t0; it++) {
3698 if (!cl[best[iter][it]][it]) {
3702 // Calculates pad-row changes
3703 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3704 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3705 for (Int_t itd = it - 1; itd >= 0; itd--) {
3706 if (cl[best[iter][itd]][itd]) {
3707 zbefore = cl[best[iter][itd]][itd]->GetZ();
3711 for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
3712 if (cl[best[iter][itd]][itd]) {
3713 zafter = cl[best[iter][itd]][itd]->GetZ();
3717 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
3718 (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
3722 Double_t dx = x[it]-xmean; // Distance to reference x
3723 sumz += cl[best[iter][it]][it]->GetZ();
3725 sumdy += dy[best[iter][it]][it];
3726 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3729 sumxy += dx*dy[best[iter][it]][it];
3730 mpads += cl[best[iter][it]][it]->GetNPads();
3731 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3732 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3733 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3743 // calculates line parameters
3745 Double_t det = sum*sumx2 - sumx*sumx;
3746 angle[iter] = (sum*sumxy - sumx*sumdy) / det;
3747 mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
3748 meanz[iter] = sumz / sum;
3749 moffset[iter] = sumdy / sum;
3750 mpads /= sum; // Mean number of pads
3752 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3753 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3755 for (Int_t it = 0; it < t1 - t0; it++) {
3756 if (!cl[best[iter][it]][it]) {
3759 Double_t dx = x[it] - xmean;
3760 Double_t ytr = mean[iter] + angle[iter] * dx;
3761 sigma2 += (dy[best[iter][it]][it] - ytr)
3762 * (dy[best[iter][it]][it] - ytr);
3763 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3764 * (dy[best[iter][it]][it] - moffset[iter]);
3767 sigma2 /= (sum - 2); // Normalized residuals
3768 sigma1 /= (sum - 1); // Normalized residuals
3769 smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
3770 sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
3771 smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
3772 sigmas[iter] = TMath::Sqrt(sigma1);
3773 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3776 // Iterative choice of "better path"
3778 for (Int_t it = 0; it < t1 - t0; it++) {
3780 if (!cl[best[iter][it]][it]) {
3784 // Add unisochronity + angular effect contribution
3785 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3786 Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
3787 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3788 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3789 Double_t mindist = 100000.0;
3792 for (Int_t ih = 0; ih < 10; ih++) {
3796 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3797 dist2 *= dist2; // Chi2 distance
3798 if (dist2 < mindist) {
3803 best[iter+1][it] = ihbest;
3807 // Update best hypothesy if better chi2 according tracklet position and angle
3809 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3810 Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
3811 Double_t say = track->GetSigmaSnpY(); // track->fCey;
3812 //Double_t chi20 = mean[bestiter]*mean[bestiter ] / sy2+angle[bestiter]*angle[bestiter]/sa2;
3813 //Double_t chi21 = mean[iter]*mean[iter] / sy2+angle[iter]*angle[iter]/sa2;
3815 Double_t detchi = sy2*sa2 - say*say;
3816 Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
3818 Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
3819 + angle[bestiter] * angle[bestiter] * invers[1]
3820 + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
3821 Double_t chi21 = mean[iter] * mean[iter] * invers[0]
3822 + angle[iter] * angle[iter] * invers[1]
3823 + 2.0 * mean[iter] * angle[iter] * invers[2];
3824 tchi2s[iter] = chi21;
3826 if ((changes[iter] <= changes[bestiter]) &&
3836 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
3837 Short_t maxpos = -1;
3838 Float_t maxcharge = 0.0;
3839 Short_t maxpos4 = -1;
3840 Float_t maxcharge4 = 0.0;
3841 Short_t maxpos5 = -1;
3842 Float_t maxcharge5 = 0.0;
3844 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
3845 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
3847 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(
3848 AliTRDcalibDB::Instance()->GetVdrift(0,0,0));
3849 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
3851 expectederr += (mpads - 3.5) * 0.04;
3853 if (changes[bestiter] > 1) {
3854 expectederr += changes[bestiter] * 0.01;
3856 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
3857 //if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
3858 //expectederr+=10000;
3860 for (Int_t it = 0; it < t1 - t0; it++) {
3862 if (!cl[best[bestiter][it]][it]) {
3866 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // Set cluster error
3867 if (!cl[best[bestiter][it]][it]->IsUsed()) {
3868 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
3869 //cl[best[bestiter][it]][it]->Use();
3872 // Time bins with maximal charge
3873 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
3874 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3875 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3878 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3879 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3880 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3881 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3885 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3886 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3887 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3888 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3892 // Time bins with maximal charge
3893 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
3894 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3895 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3898 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3899 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3900 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3901 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3905 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3906 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3907 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3908 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3912 clusters[it+t0] = indexes[best[bestiter][it]][it];
3914 // Still needed ????
3915 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 &&
3916 //cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0]
3917 // = indexes[best[bestiter][it]][it]; //Test
3922 // Set tracklet parameters
3924 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
3926 trackleterr2 += (mpads - 3.5) * 0.04;
3928 trackleterr2 += changes[bestiter] * 0.01;
3929 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
3930 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
3932 // Set tracklet parameters
3934 ,track2.GetY() + moffset[bestiter]
3938 tracklet.SetTilt(h01);
3939 tracklet.SetP0(mean[bestiter]);
3940 tracklet.SetP1(angle[bestiter]);
3941 tracklet.SetN(nfound);
3942 tracklet.SetNCross(changes[bestiter]);
3943 tracklet.SetPlane(plane);
3944 tracklet.SetSigma2(expectederr);
3945 tracklet.SetChi2(tchi2s[bestiter]);
3946 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
3947 track->fTracklets[plane] = tracklet;
3948 track->fNWrong += nbad[0];
3953 TClonesArray array0("AliTRDcluster");
3954 TClonesArray array1("AliTRDcluster");
3955 array0.ExpandCreateFast(t1 - t0 + 1);
3956 array1.ExpandCreateFast(t1 - t0 + 1);
3957 TTreeSRedirector &cstream = *fDebugStreamer;
3958 AliTRDcluster dummy;
3962 for (Int_t it = 0; it < t1 - t0; it++) {
3963 dy0[it] = dy[0][it];
3964 dyb[it] = dy[best[bestiter][it]][it];
3966 new(array0[it]) AliTRDcluster(*cl[0][it]);
3969 new(array0[it]) AliTRDcluster(dummy);
3971 if(cl[best[bestiter][it]][it]) {
3972 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
3975 new(array1[it]) AliTRDcluster(dummy);
3978 TGraph graph0(t1-t0,x,dy0);
3979 TGraph graph1(t1-t0,x,dyb);
3980 TGraph graphy(t1-t0,x,yt);
3981 TGraph graphz(t1-t0,x,zt);
3983 if (AliTRDReconstructor::StreamLevel() > 0) {
3984 cstream << "tracklet"
3985 << "track.=" << track // Track parameters
3986 << "tany=" << tany // Tangent of the local track angle
3987 << "xmean=" << xmean // Xmean - reference x of tracklet
3988 << "tilt=" << h01 // Tilt angle
3989 << "nall=" << nall // Number of foundable clusters
3990 << "nfound=" << nfound // Number of found clusters
3991 << "clfound=" << clfound // Total number of found clusters in road
3992 << "mpads=" << mpads // Mean number of pads per cluster
3993 << "plane=" << plane // Plane number
3994 << "detector=" << detector // Detector number
3995 << "road=" << road // The width of the used road
3996 << "graph0.=" << &graph0 // x - y = dy for closest cluster
3997 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
3998 << "graphy.=" << &graphy // y position of the track
3999 << "graphz.=" << &graphz // z position of the track
4000 //<< "fCl.=" << &array0 // closest cluster
4001 //<< "fCl2.=" << &array1 // second closest cluster
4002 << "maxpos=" << maxpos // Maximal charge postion
4003 << "maxcharge=" << maxcharge // Maximal charge
4004 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
4005 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
4006 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
4007 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
4008 << "bestiter=" << bestiter // Best iteration number
4009 << "tracklet.=" << &tracklet // Corrspond to the best iteration
4010 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
4011 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
4012 << "sigmas0=" << sigmas[0] // Residuals sigma
4013 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
4014 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
4015 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
4016 << "ngoodb=" << ngood[bestiter] // in best iteration
4017 << "nbadb=" << nbad[bestiter] // in best iteration
4018 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
4019 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
4020 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
4021 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
4022 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
4023 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
4024 << "mean0=" << mean[0] // Mean dy in iter=0;
4025 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
4026 << "meanb=" << mean[bestiter] // Mean dy in iter=best
4027 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
4028 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
4029 << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
4030 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
4031 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
4032 << "expectederr=" << expectederr // Expected error of cluster position
4040 //_____________________________________________________________________________
4041 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
4042 , Int_t *outlist, Bool_t down)
4045 // Sort eleements according occurancy
4046 // The size of output array has is 2*n
4049 Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
4050 Int_t *sindexF = new Int_t[2*n];
4051 for (Int_t i = 0; i < n; i++) {
4055 TMath::Sort(n,inlist,sindexS,down);
4057 Int_t last = inlist[sindexS[0]];
4060 sindexF[0+n] = last;
4064 for (Int_t i = 1; i < n; i++) {
4065 val = inlist[sindexS[i]];
4067 sindexF[countPos]++;
4071 sindexF[countPos+n] = val;
4072 sindexF[countPos]++;
4080 // Sort according frequency
4081 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
4083 for (Int_t i = 0; i < countPos; i++) {
4084 outlist[2*i ] = sindexF[sindexS[i]+n];
4085 outlist[2*i+1] = sindexF[sindexS[i]];
4095 //_____________________________________________________________________________
4096 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
4102 Double_t alpha = AliTRDgeometry::GetAlpha();
4103 Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
4107 c[ 1] = 0.0; c[ 2] = 2.0;
4108 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
4109 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
4110 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4113 AliTRDcluster *cl = 0;
4115 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
4116 if (seeds[ilayer].IsOK()) {
4117 for (Int_t itime = 22; itime > 0; itime--) {
4118 if (seeds[ilayer].GetIndexes(itime) > 0) {
4119 index = seeds[ilayer].GetIndexes(itime);
4120 cl = seeds[ilayer].GetClusters(itime);
4133 AliTRDtrack *track = new AliTRDtrack(cl
4138 ,params[6]*alpha+shift);
4139 track->PropagateTo(params[0]-5.0);
4140 track->ResetCovariance(1);
4142 Int_t rc = FollowBackProlongation(*track);
4149 CookdEdxTimBin(*track);
4150 CookLabel(track,0.9);