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 //
23 ///////////////////////////////////////////////////////////////////////////////
25 #include <Riostream.h>
30 #include <TObjArray.h>
31 #include <TTreeStream.h>
33 #include <TLinearFitter.h>
36 #include "AliRieman.h"
37 #include "AliAlignObj.h"
38 #include "AliTrackPointArray.h"
41 #include "AliTRDgeometry.h"
42 #include "AliTRDpadPlane.h"
43 #include "AliTRDgeometry.h"
44 #include "AliTRDcluster.h"
45 #include "AliTRDtrack.h"
46 #include "AliTRDseed.h"
47 #include "AliTRDcalibDB.h"
48 #include "AliTRDCommonParam.h"
49 #include "AliTRDtracker.h"
50 #include "AliTRDReconstructor.h"
52 ClassImp(AliTRDtracker)
54 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
55 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
56 const Double_t AliTRDtracker::fgkMaxChi2 = 12.;
57 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // correspond to tan = 3
58 const Double_t AliTRDtracker::fgkMaxStep = 2.; // maximal step size in propagation
60 //_____________________________________________________________________________
61 AliTRDtracker::AliTRDtracker()
76 // Default constructor
79 for (Int_t i = 0; i < kTrackingSectors; i++) {
82 for (Int_t j = 0; j < 5; j++) {
83 for (Int_t k = 0; k < 18; k++) {
84 fHoles[j][k] = kFALSE;
90 //_____________________________________________________________________________
91 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
100 ,fTimeBinsPerPlane(0)
101 ,fAddTRDseeds(kFALSE)
111 //_____________________________________________________________________________
112 AliTRDtracker::AliTRDtracker(const TFile *geomfile)
116 ,fClusters(new TObjArray(2000))
118 ,fSeeds(new TObjArray(2000))
120 ,fTracks(new TObjArray(1000))
121 ,fTimeBinsPerPlane(0)
122 ,fAddTRDseeds(kFALSE)
130 TDirectory *savedir = gDirectory;
131 TFile *in = (TFile *) geomfile;
134 AliWarning("Geometry file is not open!\n");
135 AliWarning("FULL TRD geometry and DEFAULT TRD parameter will be used\n");
139 fGeom = (AliTRDgeometry *) in->Get("TRDgeometry");
143 AliWarning("Can't find TRD geometry!\n");
144 fGeom = new AliTRDgeometry();
146 fGeom->ReadGeoMatrices();
150 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
151 Int_t trS = CookSectorIndex(geomS);
152 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
153 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
154 fHoles[icham][trS] = fGeom->IsHole(0,icham,geomS);
157 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
158 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
159 if (tiltAngle < 0.1) {
163 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
165 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
171 //_____________________________________________________________________________
172 AliTRDtracker::~AliTRDtracker()
175 // Destructor of AliTRDtracker
192 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
193 delete fTrSec[geomS];
195 if (fDebugStreamer) {
196 delete fDebugStreamer;
201 //_____________________________________________________________________________
202 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
205 // Transform internal TRD ID to global detector ID
208 Int_t isector = fGeom->GetSector(lid);
209 Int_t ichamber = fGeom->GetChamber(lid);
210 Int_t iplan = fGeom->GetPlane(lid);
212 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
215 iLayer = AliAlignObj::kTRD1;
218 iLayer = AliAlignObj::kTRD2;
221 iLayer = AliAlignObj::kTRD3;
224 iLayer = AliAlignObj::kTRD4;
227 iLayer = AliAlignObj::kTRD5;
230 iLayer = AliAlignObj::kTRD6;
234 Int_t modId = isector * fGeom->Ncham() + ichamber;
235 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
241 //_____________________________________________________________________________
242 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
245 // Transform global detector ID to local detector ID
249 AliAlignObj::ELayerID layerId = AliAlignObj::VolUIDToLayer(gid,modId);
250 Int_t isector = modId / fGeom->Ncham();
251 Int_t ichamber = modId % fGeom->Ncham();
254 case AliAlignObj::kTRD1:
257 case AliAlignObj::kTRD2:
260 case AliAlignObj::kTRD3:
263 case AliAlignObj::kTRD4:
266 case AliAlignObj::kTRD5:
269 case AliAlignObj::kTRD6:
275 if (iLayer < 0) return -1;
276 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
282 //_____________________________________________________________________________
283 Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
286 // Transform something ... whatever ...
289 // Magic constants for geo manager transformation
290 const Double_t kX0shift = 2.52;
291 const Double_t kX0shift5 = 3.05;
294 // Apply alignment and calibration to transform cluster
296 Int_t detector = cluster->GetDetector();
297 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
298 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
299 Int_t sector = fGeom->GetSector(cluster->GetDetector());
301 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
302 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.0); // Drift distance
307 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
308 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
310 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
311 AliTRDpadPlane *padPlane = commonParam->GetPadPlane(plane,chamber);
312 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
313 Double_t localPos[3];
314 Double_t localPosTracker[3];
315 localPos[0] = -cluster->GetX();
316 localPos[1] = cluster->GetY() - driftX*exB;
317 localPos[2] = cluster->GetZ() - zshiftIdeal;
319 cluster->SetY(cluster->GetY() - driftX*exB);
320 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
321 cluster->SetX(xplane- cluster->GetX());
323 TGeoHMatrix *matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
325 // No matrix found - if somebody used geometry with holes
326 AliError("Invalid Geometry - Default Geometry used\n");
329 matrix->LocalToMaster(localPos, localPosTracker);
331 if (AliTRDReconstructor::StreamLevel() > 1) {
332 (* fDebugStreamer) << "Transform"
334 << "matrix.=" << matrix
335 << "Detector=" << detector
336 << "Sector=" << sector
338 << "Chamber=" << chamber
339 << "lx0=" << localPosTracker[0]
340 << "ly0=" << localPosTracker[1]
341 << "lz0=" << localPosTracker[2]
346 cluster->SetX(localPosTracker[0]+kX0shift5);
349 cluster->SetX(localPosTracker[0]+kX0shift);
351 cluster->SetY(localPosTracker[1]);
352 cluster->SetZ(localPosTracker[2]);
358 //_____________________________________________________________________________
359 // Bool_t AliTRDtracker::Transform(AliTRDcluster * cluster)
363 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
364 // const Double_t kTime0Cor = 0.32; // time0 correction
366 // const Double_t kX0shift = 2.52;
367 // const Double_t kX0shift5 = 3.05;
370 // // apply alignment and calibration to transform cluster
373 // Int_t detector = cluster->GetDetector();
374 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
375 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
376 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
378 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
379 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
383 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
384 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
387 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
388 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
389 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
390 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
391 // localPos[2] = -cluster->GetX();
392 // localPos[0] = cluster->GetY() - driftX*exB;
393 // localPos[1] = cluster->GetZ() -zshiftIdeal;
394 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
395 // matrix->LocalToMaster(localPos, globalPos);
397 // Double_t sectorAngle = 20.*(sector%18)+10;
398 // TGeoHMatrix rotSector;
399 // rotSector.RotateZ(sectorAngle);
400 // rotSector.LocalToMaster(globalPos, localPosTracker);
403 // TGeoHMatrix matrix2(*matrix);
404 // matrix2.MultiplyLeft(&rotSector);
405 // matrix2.LocalToMaster(localPos,localPosTracker2);
409 // cluster->SetY(cluster->GetY() - driftX*exB);
410 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
411 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
412 // (*fDebugStreamer)<<"Transform"<<
414 // "matrix.="<<matrix<<
415 // "matrix2.="<<&matrix2<<
416 // "Detector="<<detector<<
417 // "Sector="<<sector<<
419 // "Chamber="<<chamber<<
420 // "lx0="<<localPosTracker[0]<<
421 // "ly0="<<localPosTracker[1]<<
422 // "lz0="<<localPosTracker[2]<<
423 // "lx2="<<localPosTracker2[0]<<
424 // "ly2="<<localPosTracker2[1]<<
425 // "lz2="<<localPosTracker2[2]<<
429 // cluster->SetX(localPosTracker[0]+kX0shift5);
431 // cluster->SetX(localPosTracker[0]+kX0shift);
433 // cluster->SetY(localPosTracker[1]);
434 // cluster->SetZ(localPosTracker[2]);
438 //_____________________________________________________________________________
439 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
442 // Rotates the track when necessary
445 Double_t alpha = AliTRDgeometry::GetAlpha();
446 Double_t y = track->GetY();
447 Double_t ymax = track->GetX() * TMath::Tan(0.5*alpha);
449 //Int_t ns = AliTRDgeometry::kNsect;
450 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
454 if (!track->Rotate(alpha)) {
458 else if (y < -ymax) {
460 if (!track->Rotate(-alpha)) {
469 //_____________________________________________________________________________
470 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
471 , Int_t timebin, UInt_t &index)
474 // Try to find cluster in the backup list
477 AliTRDcluster *cl = 0;
478 Int_t *indexes = track->GetBackupIndexes();
480 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
481 if (indexes[i] == 0) break;
482 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
486 if (cli->GetLocalTimeBin() != timebin) {
489 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
490 if (iplane == plane) {
501 //_____________________________________________________________________________
502 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
505 // Return last updated plane
509 Int_t *indexes = track->GetBackupIndexes();
511 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
512 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
516 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
517 if (iplane > lastplane) {
526 //_____________________________________________________________________________
527 Int_t AliTRDtracker::Clusters2Tracks(AliESD* event)
530 // Finds tracks within the TRD. The ESD event is expected to contain seeds
531 // at the outer part of the TRD. The seeds
532 // are found within the TRD if fAddTRDseeds is TRUE.
533 // The tracks are propagated to the innermost time bin
534 // of the TRD and the ESD event is updated
537 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
538 Float_t foundMin = fgkMinClustersInTrack * timeBins;
541 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
543 Int_t n = event->GetNumberOfTracks();
544 for (Int_t i = 0; i < n; i++) {
545 AliESDtrack *seed = event->GetTrack(i);
546 ULong_t status = seed->GetStatus();
547 if ((status & AliESDtrack::kTRDout) == 0) continue;
548 if ((status & AliESDtrack::kTRDin) != 0) continue;
551 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
552 //seed2->ResetCovariance();
553 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
555 FollowProlongation(t);
556 if (t.GetNumberOfClusters() >= foundMin) {
558 CookLabel(pt,1-fgkLabelFraction);
564 if (PropagateToX(t,xTPC,fgkMaxStep)) {
565 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
571 AliInfo(Form("Number of loaded seeds: %d",nseed));
572 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
573 AliInfo(Form("Total number of found tracks: %d",found));
579 //_____________________________________________________________________________
580 Int_t AliTRDtracker::PropagateBack(AliESD *event)
583 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
584 // backpropagated by the TPC tracker. Each seed is first propagated
585 // to the TRD, and then its prolongation is searched in the TRD.
586 // If sufficiently long continuation of the track is found in the TRD
587 // the track is updated, otherwise it's stored as originaly defined
588 // by the TPC tracker.
592 Float_t foundMin = 20;
593 Int_t n = event->GetNumberOfTracks();
596 Float_t *quality = new Float_t[n];
597 Int_t *index = new Int_t[n];
598 for (Int_t i = 0; i < n; i++) {
599 AliESDtrack *seed = event->GetTrack(i);
600 Double_t covariance[15];
601 seed->GetExternalCovariance(covariance);
602 quality[i] = covariance[0]+covariance[2];
604 TMath::Sort(n,quality,index,kFALSE);
606 for (Int_t i = 0; i < n; i++) {
608 AliESDtrack* seed=event->GetTrack(index[i]);
610 ULong_t status = seed->GetStatus();
611 if ((status & AliESDtrack::kTPCout) == 0) continue;
612 if ((status & AliESDtrack::kTRDout) != 0) continue;
614 Int_t lbl = seed->GetLabel();
615 AliTRDtrack *track = new AliTRDtrack(*seed);
616 track->SetSeedLabel(lbl);
617 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
619 Float_t p4 = track->GetC();
621 Int_t expectedClr = FollowBackProlongation(*track);
622 if ((TMath::Abs(track->GetC()-p4)/TMath::Abs(p4) < 0.2) ||
623 (TMath::Abs(track->GetPt()) > 0.8)) {
626 // Make backup for back propagation
628 Int_t foundClr = track->GetNumberOfClusters();
629 if (foundClr >= foundMin) {
631 CookdEdxTimBin(*track);
632 CookLabel(track,1-fgkLabelFraction);
633 if (track->GetBackupTrack()) {
634 UseClusters(track->GetBackupTrack());
636 if (track->GetChi2()/track->GetNumberOfClusters() < 4) {
637 // Sign only gold tracks
638 if ((seed->GetKinkIndex(0) == 0) &&
639 (TMath::Abs(track->GetPt()) < 1.5)) {
643 Bool_t isGold = kFALSE;
645 if (track->GetChi2()/track->GetNumberOfClusters() < 5) {
647 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
648 if (track->GetBackupTrack()) {
649 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
654 (track->GetNCross() == 0) &&
655 (track->GetChi2()/track->GetNumberOfClusters() < 7)){
657 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
658 if (track->GetBackupTrack()) {
659 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
663 if (!isGold && track->GetBackupTrack()) {
664 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
665 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
666 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
670 if ((track->StatusForTOF() > 0) &&
671 (track->fNCross == 0) &&
672 (Float_t(track->fN)/Float_t(track->fNExpected) > 0.4)){
673 //seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
678 // Debug part of tracking
679 TTreeSRedirector &cstream = *fDebugStreamer;
680 Int_t eventNr = event->GetEventNumber();
681 if (AliTRDReconstructor::StreamLevel() > 0) {
682 if (track->GetBackupTrack()) {
684 << "EventNr=" << eventNr
687 << "trdback.=" << track->GetBackupTrack()
692 << "EventNr=" << eventNr
695 << "trdback.=" << track
700 // Propagation to the TOF (I.Belikov)
701 if (track->GetStop() == kFALSE) {
704 Double_t xtof = 371.0;
705 Double_t c2 = track->GetC()*xtof - track->GetEta();
706 if (TMath::Abs(c2) >= 0.99) {
710 Double_t xTOF0 = 370. ;
711 PropagateToX(*track,xTOF0,fgkMaxStep);
713 // Energy losses taken to the account - check one more time
714 c2 = track->GetC()*xtof - track->GetEta();
715 if (TMath::Abs(c2) >= 0.99) {
720 Double_t ymax = xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
721 Double_t y = track->GetYat(xtof);
723 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
728 else if (y < -ymax) {
729 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
735 if (track->PropagateTo(xtof)) {
736 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
737 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
738 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
739 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
741 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
743 //seed->SetTRDtrack(new AliTRDtrack(*track));
744 if (track->GetNumberOfClusters() > foundMin) {
750 if ((track->GetNumberOfClusters() > 15) &&
751 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
752 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
753 //seed->SetStatus(AliESDtrack::kTRDStop);
754 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
755 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
756 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
758 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
760 //seed->SetTRDtrack(new AliTRDtrack(*track));
764 seed->SetTRDQuality(track->StatusForTOF());
765 seed->SetTRDBudget(track->fBudget[0]);
771 AliInfo(Form("Number of seeds: %d",fNseeds));
772 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
775 if (AliTRDReconstructor::SeedingOn()) {
776 MakeSeedsMI(3,5,event);
789 //_____________________________________________________________________________
790 Int_t AliTRDtracker::RefitInward(AliESD *event)
793 // Refits tracks within the TRD. The ESD event is expected to contain seeds
794 // at the outer part of the TRD.
795 // The tracks are propagated to the innermost time bin
796 // of the TRD and the ESD event is updated
797 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
800 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
801 Float_t foundMin = fgkMinClustersInTrack * timeBins;
804 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
807 Int_t n = event->GetNumberOfTracks();
808 for (Int_t i = 0; i < n; i++) {
809 AliESDtrack *seed = event->GetTrack(i);
810 new(&seed2) AliTRDtrack(*seed);
811 if (seed2.GetX() < 270) {
812 // Backup TPC track - only update
813 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup);
817 ULong_t status = seed->GetStatus();
818 if ((status & AliESDtrack::kTRDout) == 0) {
821 if ((status & AliESDtrack::kTRDin) != 0) {
826 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
827 Int_t *indexes2 = seed2.GetIndexes();
828 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
829 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
830 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
832 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
835 Int_t *indexes3 = pt->GetBackupIndexes();
836 for (Int_t i = 0; i < 200; i++) {
837 if (indexes2[i] == 0) break;
838 indexes3[i] = indexes2[i];
840 //AliTRDtrack *pt = seed2;
841 AliTRDtrack &t = *pt;
842 FollowProlongation(t);
843 if (t.GetNumberOfClusters() >= foundMin) {
845 //CookLabel(pt,1-fgkLabelFraction);
852 if (PropagateToX(t,xTPC,fgkMaxStep)) {
853 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
854 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
855 for (Int_t j = 0;j < AliESDtrack::kNSlice; j++) {
856 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
858 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
862 // If not prolongation to TPC - propagate without update
863 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
864 seed2->ResetCovariance(5.);
865 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
867 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
869 CookdEdxTimBin(*pt2);
870 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
871 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
872 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
873 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
875 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
883 AliInfo(Form("Number of loaded seeds: %d",nseed));
884 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
890 //_____________________________________________________________________________
891 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
894 // Starting from current position on track=t this function tries
895 // to extrapolate the track up to timeBin=0 and to confirm prolongation
896 // if a close cluster is found. Returns the number of clusters
897 // expected to be found in sensitive layers
898 // GeoManager used to estimate mean density
902 Int_t lastplane = GetLastPlane(&t);
903 Double_t radLength = 0.0;
905 Int_t expectedNumberOfClusters = 0;
907 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
909 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
910 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
913 // Propagate track close to the plane if neccessary
915 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
916 if (currentx < (-fgkMaxStep + t.GetX())) {
917 // Propagate closer to chamber - safety space fgkMaxStep
918 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) break;
920 if (!AdjustSector(&t)) break;
923 // Get material budget
931 // Starting global position
932 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
933 // End global position
934 x = fTrSec[0]->GetLayer(row0)->GetX();
935 if (!t.GetProlongation(x,y,z)) break;
936 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y*TMath::Sin(t.GetAlpha());
937 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y*TMath::Cos(t.GetAlpha());
939 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
940 // Get mean propagation parameters
942 radLength = param[1];
945 // propagate and update
947 sector = t.GetSector();
948 //for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
949 for (Int_t itime = 0; itime < GetTimeBinsPerPlane(); itime++) {
950 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
951 expectedNumberOfClusters++;
956 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
957 AliTRDcluster *cl = 0;
959 Double_t maxChi2 = fgkMaxChi2;
962 AliTRDcluster *cl0 = timeBin[0];
963 // No clusters in given time bin
965 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
966 if (plane > lastplane) continue;
967 Int_t timebin = cl0->GetLocalTimeBin();
968 AliTRDcluster *cl2 = GetCluster(&t,plane, timebin,index);
972 Double_t h01 = GetTiltFactor(cl);
973 maxChi2 = t.GetPredictedChi2(cl,h01);
976 //if (cl->GetNPads()<5)
977 Double_t dxsample = timeBin.GetdX();
978 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
979 Double_t h01 = GetTiltFactor(cl);
980 Int_t det = cl->GetDetector();
981 Int_t plane = fGeom->GetPlane(det);
984 t.fChi2Last+=maxChi2;
986 Double_t xcluster = cl->GetX();
987 t.PropagateTo(xcluster,radLength,rho);
988 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
997 return expectedNumberOfClusters;
1001 //_____________________________________________________________________________
1002 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
1005 // Starting from current radial position of track <t> this function
1006 // extrapolates the track up to outer timebin and in the sensitive
1007 // layers confirms prolongation if a close cluster is found.
1008 // Returns the number of clusters expected to be found in sensitive layers
1009 // Use GEO manager for material Description
1013 Int_t clusters[1000];
1014 Double_t radLength = 0.0;
1016 Int_t expectedNumberOfClusters = 0;
1017 Float_t ratio0 = 0.0;
1018 AliTRDtracklet tracklet;
1020 for (Int_t i = 0; i < 1000; i++) {
1024 for (Int_t iplane = 0; iplane<AliESDtrack::kNPlane; iplane++) {
1026 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1027 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1028 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1029 if (currentx < t.GetX()) continue;
1031 // Propagate closer to chamber if neccessary
1032 if (currentx > fgkMaxStep + t.GetX()) {
1033 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) break;
1035 if (!AdjustSector(&t)) break;
1036 if (TMath::Abs(t.GetSnp())>fgkMaxSnp) break;
1039 // Get material budget inside of chamber
1047 // Starting global position
1048 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
1049 // End global position
1050 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1051 if (!t.GetProlongation(x,y,z)) break;
1052 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1053 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1055 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1056 // Get mean propagation parameters
1058 radLength = param[1];
1063 sector = t.GetSector();
1064 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1065 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) continue;
1068 // Propagate and update track
1070 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1071 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1072 expectedNumberOfClusters++;
1077 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1078 AliTRDcluster *cl = 0;
1080 Double_t maxChi2 = fgkMaxChi2;
1085 if (clusters[ilayer] > 0) {
1086 index = clusters[ilayer];
1087 cl = (AliTRDcluster*)GetCluster(index);
1088 Double_t h01 = GetTiltFactor(cl);
1089 maxChi2 = t.GetPredictedChi2(cl,h01);
1093 //if (cl->GetNPads()<5)
1094 Double_t dxsample = timeBin.GetdX();
1095 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1096 Double_t h01 = GetTiltFactor(cl);
1097 Int_t det = cl->GetDetector();
1098 Int_t plane = fGeom->GetPlane(det);
1101 t.fChi2Last += maxChi2;
1103 Double_t xcluster = cl->GetX();
1104 t.PropagateTo(xcluster,radLength,rho);
1105 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1106 if(!t.Update(cl,maxChi2,index,h01)) {
1110 // Reset material budget if 2 consecutive gold
1112 if ((t.fTracklets[plane].GetN() + t.fTracklets[plane-1].GetN()) > 20) {
1122 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1123 Float_t ratio1 = Float_t(t.fN+1) / Float_t(t.fNExpected+1.0);
1124 if ((tracklet.GetChi2() < 18.0) &&
1127 (ratio0+ratio1 > 1.5) &&
1128 (t.GetNCross() == 0) &&
1129 (TMath::Abs(t.GetSnp()) < 0.85) &&
1131 // Make backup of the track until is gold
1132 t.MakeBackupTrack();
1137 return expectedNumberOfClusters;
1141 //_____________________________________________________________________________
1142 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1145 // Starting from current radial position of track <t> this function
1146 // extrapolates the track up to radial position <xToGo>.
1147 // Returns 1 if track reaches the plane, and 0 otherwise
1150 const Double_t kEpsilon = 0.00001;
1151 //Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1152 Double_t xpos = t.GetX();
1153 Double_t dir = (xpos < xToGo) ? 1.0 : -1.0;
1155 while ((xToGo-xpos)*dir > kEpsilon) {
1157 Double_t step = dir*TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1165 // Starting global position
1166 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]);
1170 if (!t.GetProlongation(x,y,z)) return 0;
1172 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1173 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1176 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1177 if (!t.PropagateTo(x,param[1],param[0])) return 0;
1187 //_____________________________________________________________________________
1188 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1191 // Fills clusters into TRD tracking_sectors
1192 // Note that the numbering scheme for the TRD tracking_sectors
1193 // differs from that of TRD sectors
1196 if (ReadClusters(fClusters,cTree)) {
1197 AliError("Problem with reading the clusters !");
1200 Int_t ncl = fClusters->GetEntriesFast();
1202 AliInfo(Form("LoadSectors: sorting %d clusters",ncl));
1205 for (Int_t ichamber = 0; ichamber < 5; ichamber++) {
1206 for (Int_t isector = 0; isector < 18; isector++) {
1207 fHoles[ichamber][isector] = kTRUE;
1213 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1214 Int_t detector = c->GetDetector();
1215 Int_t localTimeBin = c->GetLocalTimeBin();
1216 Int_t sector = fGeom->GetSector(detector);
1217 Int_t plane = fGeom->GetPlane(detector);
1219 Int_t trackingSector = CookSectorIndex(sector);
1220 if (c->GetLabel(0) > 0) {
1221 Int_t chamber = fGeom->GetChamber(detector);
1222 fHoles[chamber][trackingSector] = kFALSE;
1225 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1226 if(gtb < 0) continue;
1227 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1231 // Apply pos correction
1233 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1241 //_____________________________________________________________________________
1242 void AliTRDtracker::UnloadClusters()
1245 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1251 nentr = fClusters->GetEntriesFast();
1252 for (i = 0; i < nentr; i++) {
1253 delete fClusters->RemoveAt(i);
1257 nentr = fSeeds->GetEntriesFast();
1258 for (i = 0; i < nentr; i++) {
1259 delete fSeeds->RemoveAt(i);
1262 nentr = fTracks->GetEntriesFast();
1263 for (i = 0; i < nentr; i++) {
1264 delete fTracks->RemoveAt(i);
1267 Int_t nsec = AliTRDgeometry::kNsect;
1268 for (i = 0; i < nsec; i++) {
1269 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1270 fTrSec[i]->GetLayer(pl)->Clear();
1276 //_____________________________________________________________________________
1277 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD * esd)
1280 // Creates seeds using clusters between position inner plane and outer plane
1283 const Double_t kMaxTheta = 1.0;
1284 const Double_t kMaxPhi = 2.0;
1286 const Double_t kRoad0y = 6.0; // Road for middle cluster
1287 const Double_t kRoad0z = 8.5; // Road for middle cluster
1289 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1290 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1292 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1293 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1294 const Int_t kMaxSeed = 3000;
1295 Int_t maxSec = AliTRDgeometry::kNsect;
1297 // Linear fitters in planes
1298 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1299 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1300 fitterTC.StoreData(kTRUE);
1301 fitterT2.StoreData(kTRUE);
1302 AliRieman rieman(1000); // Rieman fitter
1303 AliRieman rieman2(1000); // Rieman fitter
1306 // Find the maximal and minimal layer for the planes
1309 AliTRDpropagationLayer *reflayers[6];
1310 for (Int_t i = 0; i < 6; i++) {
1311 layers[i][0] = 10000;
1314 for (Int_t ns = 0; ns < maxSec; ns++) {
1315 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1316 AliTRDpropagationLayer &layer= *(fTrSec[ns]->GetLayer(ilayer));
1317 if (layer == 0) continue;
1318 Int_t det = layer[0]->GetDetector();
1319 Int_t plane = fGeom->GetPlane(det);
1320 if (ilayer < layers[plane][0]) layers[plane][0] = ilayer;
1321 if (ilayer > layers[plane][1]) layers[plane][1] = ilayer;
1325 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1326 Double_t h01 = TMath::Tan(-TMath::Pi()/180.0 * padPlane->GetTiltingAngle());
1327 Double_t hL[6]; // Tilting angle
1328 Double_t xcl[6]; // x - position of reference cluster
1329 Double_t ycl[6]; // y - position of reference cluster
1330 Double_t zcl[6]; // z - position of reference cluster
1331 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1332 Float_t padlength[6] = { 10, 10, 10, 10, 10, 10 }; // Current pad-length
1333 Double_t chi2R = 0.0;
1334 Double_t chi2Z = 0.0;
1335 Double_t chi2RF = 0.0;
1336 Double_t chi2ZF = 0.0;
1338 // Total number of clusters
1340 for (Int_t i = 0; i < 6; i++) {
1342 if (i%2 == 1) hL[i] *= -1.0;
1346 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1347 AliTRDseed *seed[kMaxSeed];
1348 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1349 seed[iseed] = &pseed[iseed*6];
1351 AliTRDseed *cseed = seed[0];
1357 Double_t seedquality[kMaxSeed];
1358 Double_t seedquality2[kMaxSeed];
1359 Double_t seedparams[kMaxSeed][7];
1360 Int_t seedlayer[kMaxSeed];
1361 Int_t registered = 0;
1362 Int_t sort[kMaxSeed];
1364 // Loop over sectors
1365 for (Int_t ns = 0; ns < maxSec; ns++) {
1366 //for (Int_t ns = 0; ns < 5; ns++) { //loop over sectors
1367 registered = 0; // Reset registerd seed counter
1368 cseed = seed[registered];
1370 // Loop over central seeding time bins
1371 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1372 //for (Int_t dseed=5;dseed<15; dseed+=3){
1374 Int_t dseed = 5 + Int_t(iter)*3;
1375 // Initialize seeding layers
1376 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1377 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1378 xcl[ilayer] = reflayers[ilayer]->GetX();
1380 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1381 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1382 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1383 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1384 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1386 Int_t maxn3 = layer3;
1387 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1388 AliTRDcluster *cl3 = layer3[icl3];
1390 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2()*12.);
1391 ycl[sLayer+3] = cl3->GetY();
1392 zcl[sLayer+3] = cl3->GetZ();
1393 Float_t yymin0 = ycl[sLayer+3] - 1 - kMaxPhi * (xcl[sLayer+3] - xcl[sLayer+0]);
1394 Float_t yymax0 = ycl[sLayer+3] + 1 + kMaxPhi * (xcl[sLayer+3] - xcl[sLayer+0]);
1395 Int_t maxn0 = layer0;
1397 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1399 AliTRDcluster *cl0 = layer0[icl0];
1401 if (cl3->IsUsed() && cl0->IsUsed()) continue;
1402 ycl[sLayer+0] = cl0->GetY();
1403 zcl[sLayer+0] = cl0->GetZ();
1404 if (ycl[sLayer+0] > yymax0) break;
1405 Double_t tanphi = (ycl[sLayer+3] - ycl[sLayer+0]) / (xcl[sLayer+3] - xcl[sLayer+0]);
1406 if (TMath::Abs(tanphi) > kMaxPhi) continue;
1407 Double_t tantheta = (zcl[sLayer+3] - zcl[sLayer+0]) / (xcl[sLayer+3] - xcl[sLayer+0]);
1408 if (TMath::Abs(tantheta) > kMaxTheta) continue;
1409 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2()*12.0);
1411 // Expected position in 1 layer
1412 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1] - xcl[sLayer+0]);
1413 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1] - xcl[sLayer+0]);
1414 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1415 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1416 Int_t maxn1 = layer1;
1418 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1420 AliTRDcluster *cl1 = layer1[icl1];
1423 if (cl3->IsUsed()) nusedCl++;
1424 if (cl0->IsUsed()) nusedCl++;
1425 if (cl1->IsUsed()) nusedCl++;
1426 if (nusedCl > 1) continue;
1427 ycl[sLayer+1] = cl1->GetY();
1428 zcl[sLayer+1] = cl1->GetZ();
1429 if (ycl[sLayer+1] > yymax1) break;
1430 if (TMath::Abs(ycl[sLayer+1] - y1exp) > kRoad0y+tanphi) continue;
1431 if (TMath::Abs(zcl[sLayer+1] - z1exp) > kRoad0z) continue;
1432 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2()*12.);
1434 Double_t y2exp = ycl[sLayer+0] + (tanphi)
1435 * (xcl[sLayer+2] - xcl[sLayer+0]) + (ycl[sLayer+1] - y1exp);
1436 Double_t z2exp = zcl[sLayer+0] + (tantheta)
1437 * (xcl[sLayer+2] - xcl[sLayer+0]);
1438 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1439 if (index2 <= 0) continue;
1440 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1441 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2()*12.0);
1442 ycl[sLayer+2] = cl2->GetY();
1443 zcl[sLayer+2] = cl2->GetZ();
1444 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) continue;
1447 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1448 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1449 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1450 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1454 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1455 cseed[iLayer].Reset();
1459 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1460 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1461 chi2Z += (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer])
1462 * (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer]);
1463 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1464 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1465 chi2R += (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer])
1466 * (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer]);
1467 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1469 if (TMath::Sqrt(chi2R) > 1.0/iter) continue;
1470 if (TMath::Sqrt(chi2Z) > 7.0/iter) continue;
1472 Float_t minmax[2] = { -100.0, 100.0 };
1473 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1474 Float_t max = zcl[sLayer+iLayer] + padlength[sLayer+iLayer] * 0.5 + 1.0
1475 -cseed[sLayer+iLayer].fZref[0];
1476 if (max < minmax[1]) minmax[1] = max;
1477 Float_t min = zcl[sLayer+iLayer] - padlength[sLayer+iLayer] * 0.5 - 1.0
1478 -cseed[sLayer+iLayer].fZref[0];
1479 if (min > minmax[0]) minmax[0] = min;
1482 Bool_t isFake = kFALSE;
1483 if (cl0->GetLabel(0) != cl3->GetLabel(0)) isFake = kTRUE;
1484 if (cl1->GetLabel(0) != cl3->GetLabel(0)) isFake = kTRUE;
1485 if (cl2->GetLabel(0) != cl3->GetLabel(0)) isFake = kTRUE;
1487 if (AliTRDReconstructor::StreamLevel() > 0) {
1488 if ((!isFake) || ((icl3%10) == 0)) {
1489 TTreeSRedirector &cstream = *fDebugStreamer;
1491 << "isFake=" << isFake
1497 << "X0=" << xcl[sLayer+0]
1498 << "X1=" << xcl[sLayer+1]
1499 << "X2=" << xcl[sLayer+2]
1500 << "X3=" << xcl[sLayer+3]
1501 << "Y2exp=" << y2exp
1502 << "Z2exp=" << z2exp
1503 << "Chi2R=" << chi2R
1504 << "Chi2Z=" << chi2Z
1505 << "Seed0.=" << &cseed[sLayer+0]
1506 << "Seed1.=" << &cseed[sLayer+1]
1507 << "Seed2.=" << &cseed[sLayer+2]
1508 << "Seed3.=" << &cseed[sLayer+3]
1509 << "Zmin=" << minmax[0]
1510 << "Zmax=" << minmax[1]
1524 Bool_t isOK = kTRUE;
1525 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1527 cseed[sLayer+jLayer].fTilt = hL[sLayer+jLayer];
1528 cseed[sLayer+jLayer].fPadLength = padlength[sLayer+jLayer];
1529 cseed[sLayer+jLayer].fX0 = xcl[sLayer+jLayer];
1531 for (Int_t iter = 0; iter < 2; iter++) {
1534 // In iteration 0 we try only one pad-row
1535 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1538 AliTRDseed tseed = cseed[sLayer+jLayer];
1539 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1541 roadz = padlength[sLayer+jLayer];
1544 Float_t quality = 10000.0;
1545 for (Int_t iTime = 2; iTime < 20; iTime++) {
1547 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1548 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1549 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1551 // Try 2 pad-rows in second iteration
1552 zexp = tseed.fZref[0] + tseed.fZref[1]*dxlayer;
1553 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1554 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer] * 0.5;
1556 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1557 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer] * 0.5;
1561 Double_t yexp = tseed.fYref[0] + tseed.fYref[1] * dxlayer;
1562 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1563 if (index <= 0) continue;
1564 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1567 tseed.fIndexes[iTime] = index;
1568 tseed.fClusters[iTime] = cl;
1569 tseed.fX[iTime] = dxlayer;
1570 tseed.fY[iTime] = cl->GetY();
1571 tseed.fZ[iTime] = cl->GetZ();
1576 // Count the number of clusters and distortions into quality
1577 Float_t dangle = tseed.fYfit[1] - tseed.fYref[1];
1578 Float_t tquality = (18.0 - tseed.fN2) / 2.0 + TMath::Abs(dangle) / 0.1
1579 + TMath::Abs(tseed.fYfit[0] - tseed.fYref[0]) / 0.2
1580 + 2.0 * TMath::Abs(tseed.fMeanz - tseed.fZref[0]) / padlength[jLayer];
1581 if ((iter == 0) && tseed.IsOK()) {
1582 cseed[sLayer+jLayer] = tseed;
1584 if (tquality < 5) break;
1586 if (tseed.IsOK() && (tquality < quality)) {
1587 cseed[sLayer+jLayer] = tseed;
1592 if (!cseed[sLayer+jLayer].IsOK()) {
1596 cseed[sLayer+jLayer].CookLabels();
1597 cseed[sLayer+jLayer].UpdateUsed();
1598 nusedCl += cseed[sLayer+jLayer].fNUsed;
1606 if (!isOK) continue;
1608 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1609 if (cseed[sLayer+iLayer].IsOK()) {
1610 nclusters += cseed[sLayer+iLayer].fN2;
1616 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1617 rieman.AddPoint(xcl[sLayer+iLayer]
1618 ,cseed[sLayer+iLayer].fYfitR[0]
1619 ,cseed[sLayer+iLayer].fZProb
1627 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1628 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1629 chi2R += (cseed[sLayer+iLayer].fYref[0] - cseed[sLayer+iLayer].fYfitR[0])
1630 * (cseed[sLayer+iLayer].fYref[0] - cseed[sLayer+iLayer].fYfitR[0]);
1631 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1632 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1633 chi2Z += (cseed[sLayer+iLayer].fZref[0] - cseed[sLayer+iLayer].fMeanz)
1634 * (cseed[sLayer+iLayer].fZref[0] - cseed[sLayer+iLayer].fMeanz);
1635 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1637 Double_t curv = rieman.GetC();
1642 Double_t sumda = TMath::Abs(cseed[sLayer+0].fYfitR[1] - cseed[sLayer+0].fYref[1])
1643 + TMath::Abs(cseed[sLayer+1].fYfitR[1] - cseed[sLayer+1].fYref[1])
1644 + TMath::Abs(cseed[sLayer+2].fYfitR[1] - cseed[sLayer+2].fYref[1])
1645 + TMath::Abs(cseed[sLayer+3].fYfitR[1] - cseed[sLayer+3].fYref[1]);
1646 Double_t likea = TMath::Exp(-sumda * 10.6);
1647 Double_t likechi2 = 0.0000000001;
1649 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1651 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1652 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1653 Double_t like = likea * likechi2 * likechi2z * likeN;
1655 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fYref[1] - 130*curv) * 1.9);
1656 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fZref[1]
1657 - cseed[sLayer+0].fZref[0] / xcl[sLayer+0]) * 5.9);
1658 Double_t likePrim = TMath::Max(likePrimY * likePrimZ,0.0005);
1660 seedquality[registered] = like;
1661 seedlayer[registered] = sLayer;
1662 if (TMath::Log(0.000000000000001 + like) < -15) continue;
1663 AliTRDseed seedb[6];
1664 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1665 seedb[iLayer] = cseed[iLayer];
1670 // FULL TRACK FIT PART
1679 // Add new layers - avoid long extrapolation
1681 Int_t tLayer[2] = { 0, 0 };
1695 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1697 // Set tracking layer
1698 Int_t jLayer = tLayer[iLayer];
1699 cseed[jLayer].Reset();
1700 cseed[jLayer].fTilt = hL[jLayer];
1701 cseed[jLayer].fPadLength = padlength[jLayer];
1702 cseed[jLayer].fX0 = xcl[jLayer];
1703 // Get pad length and rough cluster
1704 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].fYref[0]
1705 ,cseed[jLayer].fZref[0]
1708 if (indexdummy <= 0) continue;
1709 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
1710 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
1714 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
1716 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1718 // Set tracking layer
1719 Int_t jLayer = tLayer[iLayer];
1720 if ((jLayer == 0) && !(cseed[1].IsOK())) continue; // break not allowed
1721 if ((jLayer == 5) && !(cseed[4].IsOK())) continue; // break not allowed
1722 Float_t zexp = cseed[jLayer].fZref[0];
1723 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
1725 for (Int_t iter = 0; iter < 2; iter++) {
1727 AliTRDseed tseed = cseed[jLayer];
1728 Float_t quality = 10000.0;
1729 for (Int_t iTime = 2; iTime < 20; iTime++) {
1731 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
1732 Double_t dxlayer = layer.GetX() - xcl[jLayer];
1733 Double_t yexp = tseed.fYref[0] + tseed.fYref[1] * dxlayer;
1734 Float_t yroad = kRoad1y;
1735 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
1736 if (index <= 0) continue;
1737 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1740 tseed.fIndexes[iTime] = index;
1741 tseed.fClusters[iTime] = cl;
1742 tseed.fX[iTime] = dxlayer;
1743 tseed.fY[iTime] = cl->GetY();
1744 tseed.fZ[iTime] = cl->GetZ();
1750 Float_t dangle = tseed.fYfit[1] - tseed.fYref[1];
1751 Float_t tquality = (18.0 - tseed.fN2) / 2.0
1752 + TMath::Abs(dangle) / 0.1
1753 + TMath::Abs(tseed.fYfit[0] - tseed.fYref[0])/0.2
1754 + 2.0 * TMath::Abs(tseed.fMeanz - tseed.fZref[0])/padlength[jLayer];
1755 if (tquality < quality) {
1756 cseed[jLayer] = tseed;
1765 if (cseed[jLayer].IsOK()) {
1766 cseed[jLayer].CookLabels();
1767 cseed[jLayer].UpdateUsed();
1768 nusedf += cseed[jLayer].fNUsed;
1769 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
1775 AliTRDseed bseed[6];
1776 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1777 bseed[jLayer] = cseed[jLayer];
1779 Float_t lastquality = 10000.0;
1780 Float_t lastchi2 = 10000.0;
1781 Float_t chi2 = 1000.0;
1783 for (Int_t iter = 0; iter < 4; iter++) {
1786 // Sort tracklets according "quality", try to "improve" 4 worst
1788 Float_t sumquality = 0.0;
1789 Float_t squality[6];
1790 Int_t sortindexes[6];
1791 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1792 if (bseed[jLayer].IsOK()) {
1793 AliTRDseed &tseed = bseed[jLayer];
1794 Double_t zcor = tseed.fTilt*(tseed.fZProb - tseed.fZref[0]);
1795 Float_t dangle = tseed.fYfit[1] - tseed.fYref[1];
1796 Float_t tquality = (18.0 - tseed.fN2) / 2.0
1797 + TMath::Abs(dangle) / 0.1
1798 + TMath::Abs(tseed.fYfit[0] - (tseed.fYref[0] - zcor)) / 0.2
1799 + 2.0 * TMath::Abs(tseed.fMeanz - tseed.fZref[0])
1800 / padlength[jLayer];
1801 squality[jLayer] = tquality;
1804 squality[jLayer] = -1.0;
1806 sumquality += squality[jLayer];
1809 if ((sumquality >= lastquality) ||
1810 (chi2 > lastchi2)) break;
1811 lastquality = sumquality;
1814 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1815 cseed[jLayer] = bseed[jLayer];
1818 TMath::Sort(6,squality,sortindexes,kFALSE);
1820 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
1822 Int_t bLayer = sortindexes[jLayer];
1823 AliTRDseed tseed = bseed[bLayer];
1825 for (Int_t iTime=2;iTime<20;iTime++){
1827 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1] - iTime));
1828 Double_t dxlayer = layer.GetX()-xcl[bLayer];
1830 Double_t zexp = tseed.fZref[0];
1831 Double_t zcor = tseed.fTilt*(tseed.fZProb - tseed.fZref[0]);
1833 Float_t roadz = padlength[bLayer] + 1.0;
1834 if (TMath::Abs(tseed.fZProb - zexp) > padlength[bLayer]*0.5) {
1835 roadz = padlength[bLayer] * 0.5;
1837 if (tseed.fZfit[1]*tseed.fZref[1] < 0) {
1838 roadz = padlength[bLayer] * 0.5;
1840 if (TMath::Abs(tseed.fZProb - zexp) < 0.1*padlength[bLayer]) {
1841 zexp = tseed.fZProb;
1842 roadz = padlength[bLayer] * 0.5;
1845 Double_t yexp = tseed.fYref[0] + tseed.fYref[1] * dxlayer - zcor;
1846 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1847 if (index <= 0) continue;
1848 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1850 tseed.fIndexes[iTime] = index;
1851 tseed.fClusters[iTime] = cl;
1852 tseed.fX[iTime] = dxlayer;
1853 tseed.fY[iTime] = cl->GetY();
1854 tseed.fZ[iTime] = cl->GetZ();
1860 Float_t dangle = tseed.fYfit[1] - tseed.fYref[1];
1861 Double_t zcor = tseed.fTilt * (tseed.fZProb - tseed.fZref[0]);
1862 Float_t tquality = (18.0 - tseed.fN2) / 2.0
1863 + TMath::Abs(dangle) / 0.1
1864 + TMath::Abs(tseed.fYfit[0] - (tseed.fYref[0] - zcor)) / 0.2
1865 + 2.0 * TMath::Abs(tseed.fMeanz - tseed.fZref[0])
1866 / padlength[jLayer];
1867 if (tquality < squality[bLayer]) {
1868 bseed[bLayer] = tseed;
1874 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
1881 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1882 if (TMath::Abs(cseed[iLayer].fYref[0] / cseed[iLayer].fX0) < 0.15) {
1885 if (cseed[iLayer].IsOK()) {
1886 nclusters += cseed[iLayer].fN2;
1890 if (nlayers < 3) continue;
1892 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1893 if (cseed[iLayer].IsOK()) {
1894 rieman.AddPoint(xcl[iLayer]
1895 ,cseed[iLayer].fYfitR[0]
1896 ,cseed[iLayer].fZProb
1905 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1906 if (cseed[iLayer].IsOK()) {
1907 cseed[iLayer].fYref[0] = rieman.GetYat(xcl[iLayer]);
1908 chi2RF += (cseed[iLayer].fYref[0] - cseed[iLayer].fYfitR[0])
1909 * (cseed[iLayer].fYref[0] - cseed[iLayer].fYfitR[0]);
1910 cseed[iLayer].fYref[1] = rieman.GetDYat(xcl[iLayer]);
1911 cseed[iLayer].fZref[0] = rieman.GetZat(xcl[iLayer]);
1912 chi2ZF += (cseed[iLayer].fZref[0] - cseed[iLayer].fMeanz)
1913 * (cseed[iLayer].fZref[0] - cseed[iLayer].fMeanz);
1914 cseed[iLayer].fZref[1] = rieman.GetDZat(xcl[iLayer]);
1917 chi2RF /= TMath::Max((nlayers-3.0),1.0);
1918 chi2ZF /= TMath::Max((nlayers-3.0),1.0);
1919 curv = rieman.GetC();
1921 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
1922 Double_t dzmf = rieman.GetDZat(xref2);
1923 Double_t zmf = rieman.GetZat(xref2);
1929 fitterTC.ClearPoints();
1930 fitterT2.ClearPoints();
1932 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1934 if (!cseed[iLayer].IsOK()) continue;
1935 for (Int_t itime = 0; itime < 25; itime++) {
1937 if (!cseed[iLayer].fUsable[itime]) continue;
1939 // x relative to the middle chamber
1940 Double_t x = cseed[iLayer].fX[itime] + cseed[iLayer].fX0 - xref2;
1941 Double_t y = cseed[iLayer].fY[itime];
1942 Double_t z = cseed[iLayer].fZ[itime];
1944 // ExB correction to the correction
1949 Double_t x2 = cseed[iLayer].fX[itime] + cseed[iLayer].fX0;
1950 Double_t t = 1.0 / (x2*x2 + y*y);
1952 uvt[0] = 2.0 * x2*uvt[1];
1953 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
1954 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
1955 uvt[4] = 2.0 * (y + hL[iLayer] * z) * uvt[1];
1957 Double_t error = 2.0 * 0.2 * uvt[1];
1958 fitterT2.AddPoint(uvt,uvt[4],error);
1961 // Constrained rieman
1963 z = cseed[iLayer].fZ[itime];
1964 uvt[0] = 2.0 * x2 * t;
1965 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
1966 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
1967 fitterTC.AddPoint(uvt,uvt[2],error);
1969 rieman2.AddPoint(x2,y,z,1,10);
1979 Double_t rpolz0 = fitterT2.GetParameter(3);
1980 Double_t rpolz1 = fitterT2.GetParameter(4);
1983 // Linear fitter - not possible to make boundaries
1984 // non accept non possible z and dzdx combination
1986 Bool_t acceptablez = kTRUE;
1987 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1988 if (cseed[iLayer].IsOK()) {
1989 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
1990 if (TMath::Abs(cseed[iLayer].fZProb - zT2) > (padlength[iLayer] * 0.5 + 1.0)) {
1991 acceptablez = kFALSE;
1996 fitterT2.FixParameter(3,zmf);
1997 fitterT2.FixParameter(4,dzmf);
1999 fitterT2.ReleaseParameter(3);
2000 fitterT2.ReleaseParameter(4);
2001 rpolz0 = fitterT2.GetParameter(3);
2002 rpolz1 = fitterT2.GetParameter(4);
2005 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2006 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2008 Double_t polz1c = fitterTC.GetParameter(2);
2009 Double_t polz0c = polz1c * xref2;
2011 Double_t aC = fitterTC.GetParameter(0);
2012 Double_t bC = fitterTC.GetParameter(1);
2013 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2015 Double_t aR = fitterT2.GetParameter(0);
2016 Double_t bR = fitterT2.GetParameter(1);
2017 Double_t dR = fitterT2.GetParameter(2);
2018 Double_t cR = 1.0 + bR*bR - dR*aR;
2022 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2023 cR = aR / TMath::Sqrt(cR);
2026 Double_t chi2ZT2 = 0.0;
2027 Double_t chi2ZTC = 0.0;
2028 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2029 if (cseed[iLayer].IsOK()) {
2030 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2031 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2032 chi2ZT2 += TMath::Abs(cseed[iLayer].fMeanz - zT2);
2033 chi2ZTC += TMath::Abs(cseed[iLayer].fMeanz - zTC);
2036 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2037 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2039 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2040 Float_t sumdaf = 0.0;
2041 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2042 if (cseed[iLayer].IsOK()) {
2043 sumdaf += TMath::Abs((cseed[iLayer].fYfit[1] - cseed[iLayer].fYref[1])
2044 / cseed[iLayer].fSigmaY2);
2047 sumdaf /= Float_t (nlayers - 2.0);
2050 // Likelihoods for full track
2052 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2053 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2054 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2055 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2056 seedquality2[registered] = likezf * likechi2TR * likeaf;
2058 // Needed still ????
2059 // Bool_t isGold = kFALSE;
2061 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.)
2062 // isGold =kTRUE; // gold
2063 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.)
2064 // isGold =kTRUE; // gold
2065 // if (isGold &&nusedf<10){
2066 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2067 // if ( seed[index][jLayer].IsOK()&&
2068 // TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2069 // seed[index][jLayer].UseClusters(); //sign gold
2074 if (!cseed[0].IsOK()) {
2076 if (!cseed[1].IsOK()) {
2080 seedparams[registered][0] = cseed[index0].fX0;
2081 seedparams[registered][1] = cseed[index0].fYref[0];
2082 seedparams[registered][2] = cseed[index0].fZref[0];
2083 seedparams[registered][5] = cR;
2084 seedparams[registered][3] = cseed[index0].fX0 * cR
2085 - TMath::Sin(TMath::ATan(cseed[0].fYref[1]));
2086 seedparams[registered][4] = cseed[index0].fZref[1]
2087 / TMath::Sqrt(1.0 + cseed[index0].fYref[1]
2088 * cseed[index0].fYref[1]);
2089 seedparams[registered][6] = ns;
2094 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2095 if (!cseed[iLayer].IsOK()) continue;
2096 if (cseed[iLayer].fLabels[0] >= 0) {
2097 labels[nlab] = cseed[iLayer].fLabels[0];
2100 if (cseed[iLayer].fLabels[1] >= 0) {
2101 labels[nlab] = cseed[iLayer].fLabels[1];
2105 Freq(nlab,labels,outlab,kFALSE);
2106 Int_t label = outlab[0];
2107 Int_t frequency = outlab[1];
2108 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2109 cseed[iLayer].fFreq = frequency;
2110 cseed[iLayer].fC = cR;
2111 cseed[iLayer].fCC = cC;
2112 cseed[iLayer].fChi2 = chi2TR;
2113 cseed[iLayer].fChi2Z = chi2ZF;
2117 if (1 || (!isFake)){
2118 Float_t zvertex = GetZ();
2119 TTreeSRedirector &cstream = *fDebugStreamer;
2120 if (AliTRDReconstructor::StreamLevel() > 0) {
2122 << "isFake=" << isFake
2123 << "Vertex=" << zvertex
2124 << "Rieman2.=" << &rieman2
2125 << "Rieman.=" << &rieman
2133 << "Chi2R=" << chi2R
2134 << "Chi2Z=" << chi2Z
2135 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2136 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2137 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2138 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2139 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2140 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2141 << "C=" << curv // Non constrained - no tilt correction
2142 << "DR=" << dR // DR parameter - tilt correction
2143 << "DCA=" << dca // DCA - tilt correction
2144 << "CR=" << cR // Non constrained curvature - tilt correction
2145 << "CC=" << cC // Constrained curvature
2146 << "Polz0=" << polz0c
2147 << "Polz1=" << polz1c
2148 << "RPolz0=" << rpolz0
2149 << "RPolz1=" << rpolz1
2150 << "Ncl=" << nclusters
2151 << "Nlayers=" << nlayers
2152 << "NUsedS=" << nusedCl
2153 << "NUsed=" << nusedf
2154 << "Findable=" << findable
2156 << "LikePrim=" << likePrim
2157 << "Likechi2C=" << likechi2C
2158 << "Likechi2TR=" << likechi2TR
2159 << "Likezf=" << likezf
2160 << "LikeF=" << seedquality2[registered]
2161 << "S0.=" << &cseed[0]
2162 << "S1.=" << &cseed[1]
2163 << "S2.=" << &cseed[2]
2164 << "S3.=" << &cseed[3]
2165 << "S4.=" << &cseed[4]
2166 << "S5.=" << &cseed[5]
2167 << "SB0.=" << &seedb[0]
2168 << "SB1.=" << &seedb[1]
2169 << "SB2.=" << &seedb[2]
2170 << "SB3.=" << &seedb[3]
2171 << "SB4.=" << &seedb[4]
2172 << "SB5.=" << &seedb[5]
2173 << "Label=" << label
2174 << "Freq=" << frequency
2175 << "sLayer=" << sLayer
2179 if (registered<kMaxSeed - 1) {
2181 cseed = seed[registered];
2184 } // End of loop over layer 1
2186 } // End of loop over layer 0
2188 } // End of loop over layer 3
2190 } // End of loop over seeding time bins
2195 TMath::Sort(registered,seedquality2,sort,kTRUE);
2196 Bool_t signedseed[kMaxSeed];
2197 for (Int_t i = 0; i < registered; i++) {
2198 signedseed[i] = kFALSE;
2200 for (Int_t iter = 0; iter < 5; iter++) {
2202 for (Int_t iseed = 0; iseed < registered; iseed++) {
2204 Int_t index = sort[iseed];
2205 if (signedseed[index]) continue;
2206 Int_t labelsall[1000];
2207 Int_t nlabelsall = 0;
2208 Int_t naccepted = 0;;
2209 Int_t sLayer = seedlayer[index];
2215 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2217 if (TMath::Abs(seed[index][jLayer].fYref[0] / xcl[jLayer]) < 0.15) {
2221 if (seed[index][jLayer].IsOK()) {
2223 seed[index][jLayer].UpdateUsed();
2224 ncl += seed[index][jLayer].fN2;
2225 nused += seed[index][jLayer].fNUsed;
2229 for (Int_t itime = 0; itime < 25; itime++) {
2230 if (seed[index][jLayer].fUsable[itime]) {
2232 for (Int_t ilab = 0; ilab < 3; ilab++) {
2233 Int_t tindex = seed[index][jLayer].fClusters[itime]->GetLabel(ilab);
2235 labelsall[nlabelsall] = tindex;
2246 if (nused > 30) continue;
2249 if (nlayers < 6) continue;
2250 if (TMath::Log(0.000000001 + seedquality2[index]) < -5.0) continue; // Gold
2254 if (nlayers < findable) continue;
2255 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) continue;
2259 if ((nlayers == findable) ||
2260 (nlayers == 6)) continue;
2261 if (TMath::Log(0.000000001 + seedquality2[index]) < -6.0) continue;
2265 if (TMath::Log(0.000000001 + seedquality2[index]) < -5.0) continue;
2269 if ((TMath::Log(0.000000001 + seedquality2[index]) - nused/(nlayers - 3.0)) < -15.0) {
2274 signedseed[index] = kTRUE;
2279 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2280 if (seed[index][iLayer].IsOK()) {
2281 if (seed[index][iLayer].fLabels[0] >= 0) {
2282 labels[nlab] = seed[index][iLayer].fLabels[0];
2285 if (seed[index][iLayer].fLabels[1] >= 0) {
2286 labels[nlab] = seed[index][iLayer].fLabels[1];
2291 Freq(nlab,labels,outlab,kFALSE);
2292 Int_t label = outlab[0];
2293 Int_t frequency = outlab[1];
2294 Freq(nlabelsall,labelsall,outlab,kFALSE);
2295 Int_t label1 = outlab[0];
2296 Int_t label2 = outlab[2];
2297 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2298 Float_t ratio = Float_t(nused) / Float_t(ncl);
2300 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2301 if (seed[index][jLayer].IsOK() &&
2302 TMath::Abs(seed[index][jLayer].fYfit[1] - seed[index][jLayer].fYfit[1]) < 0.2) {
2303 seed[index][jLayer].UseClusters(); // Sign gold
2308 Int_t eventNr = esd->GetEventNumber();
2309 TTreeSRedirector &cstream = *fDebugStreamer;
2314 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2320 AliESDtrack esdtrack;
2321 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2322 esdtrack.SetLabel(label);
2323 esd->AddTrack(&esdtrack);
2324 TTreeSRedirector &cstream = *fDebugStreamer;
2325 if (AliTRDReconstructor::StreamLevel() > 0) {
2327 << "EventNr=" << eventNr
2328 << "ESD.=" << &esdtrack
2330 << "trdback.=" << track
2335 if (AliTRDReconstructor::StreamLevel() > 0) {
2338 << "Track.=" << track
2339 << "Like=" << seedquality[index]
2340 << "LikeF=" << seedquality2[index]
2341 << "S0.=" << &seed[index][0]
2342 << "S1.=" << &seed[index][1]
2343 << "S2.=" << &seed[index][2]
2344 << "S3.=" << &seed[index][3]
2345 << "S4.=" << &seed[index][4]
2346 << "S5.=" << &seed[index][5]
2347 << "Label=" << label
2348 << "Label1=" << label1
2349 << "Label2=" << label2
2350 << "FakeRatio=" << fakeratio
2351 << "Freq=" << frequency
2353 << "Nlayers=" << nlayers
2354 << "Findable=" << findable
2355 << "NUsed=" << nused
2356 << "sLayer=" << sLayer
2357 << "EventNr=" << eventNr
2365 } // End of loop over sectors
2371 //_____________________________________________________________________________
2372 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree) const
2375 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2376 // from the file. The names of the cluster tree and branches
2377 // should match the ones used in AliTRDclusterizer::WriteClusters()
2380 Int_t nsize = Int_t(ClusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2381 TObjArray *clusterArray = new TObjArray(nsize + 1000);
2383 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2385 AliError("Can't get the cluster branch!");
2388 branch->SetAddress(&clusterArray);
2390 // Loop through all entries in the tree
2391 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2393 AliTRDcluster *c = 0;
2394 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2397 nbytes += ClusterTree->GetEvent(iEntry);
2399 // Get the number of points in the detector
2400 Int_t nCluster = clusterArray->GetEntriesFast();
2402 // Loop through all TRD digits
2403 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2404 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2405 AliTRDcluster *co = c;
2407 clusterArray->RemoveAt(iCluster);
2412 delete clusterArray;
2418 //_____________________________________________________________________________
2419 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2422 // Get track space point with index i
2423 // Origin: C.Cheshkov
2426 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2427 Int_t idet = cl->GetDetector();
2428 Int_t isector = fGeom->GetSector(idet);
2429 Int_t ichamber = fGeom->GetChamber(idet);
2430 Int_t iplan = fGeom->GetPlane(idet);
2432 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2433 local[1] = cl->GetY();
2434 local[2] = cl->GetZ();
2436 fGeom->RotateBack(idet,local,global);
2437 p.SetXYZ(global[0],global[1],global[2]);
2438 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
2441 iLayer = AliAlignObj::kTRD1;
2444 iLayer = AliAlignObj::kTRD2;
2447 iLayer = AliAlignObj::kTRD3;
2450 iLayer = AliAlignObj::kTRD4;
2453 iLayer = AliAlignObj::kTRD5;
2456 iLayer = AliAlignObj::kTRD6;
2459 Int_t modId = isector * fGeom->Ncham() + ichamber;
2460 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
2461 p.SetVolumeID(volid);
2467 //_____________________________________________________________________________
2468 void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2471 // This cooks a label. Mmmmh, smells good...
2474 Int_t label = 123456789;
2478 Int_t ncl = pt->GetNumberOfClusters();
2479 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2483 Int_t **s = new Int_t*[kRange];
2484 for (i = 0; i < kRange; i++) {
2485 s[i] = new Int_t[2];
2487 for (i = 0; i < kRange; i++) {
2495 for (i = 0; i < ncl; i++) {
2496 index = pt->GetClusterIndex(i);
2497 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2498 t0 = c->GetLabel(0);
2499 t1 = c->GetLabel(1);
2500 t2 = c->GetLabel(2);
2503 for (i = 0; i < ncl; i++) {
2504 index = pt->GetClusterIndex(i);
2505 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2506 for (Int_t k = 0; k < 3; k++) {
2507 label = c->GetLabel(k);
2508 labelAdded = kFALSE;
2511 while ((!labelAdded) && (j < kRange)) {
2512 if ((s[j][0] == label) ||
2515 s[j][1] = s[j][1] + 1;
2527 for (i = 0; i < kRange; i++) {
2528 if (s[i][1] > max) {
2534 for (i = 0; i < kRange; i++) {
2540 if ((1.0 - Float_t(max)/ncl) > wrong) {
2544 pt->SetLabel(label);
2548 //_____________________________________________________________________________
2549 void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2552 // Use clusters, but don't abuse them!
2555 const Float_t kmaxchi2 = 18.0;
2556 const Float_t kmincl = 10.0;
2557 AliTRDtrack *track = (AliTRDtrack *) t;
2559 Int_t ncl = t->GetNumberOfClusters();
2560 for (Int_t i = from; i < ncl; i++) {
2561 Int_t index = t->GetClusterIndex(i);
2562 AliTRDcluster *c= (AliTRDcluster *) fClusters->UncheckedAt(index);
2563 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2564 if (track->fTracklets[iplane].GetChi2() > kmaxchi2) continue;
2565 if (track->fTracklets[iplane].GetN() < kmincl) continue;
2566 if (!(c->IsUsed())) c->Use();
2571 //_____________________________________________________________________________
2572 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2575 // Parametrised "expected" error of the cluster reconstruction in Y
2578 Double_t s = 0.08 * 0.08;
2584 //_____________________________________________________________________________
2585 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2588 // Parametrised "expected" error of the cluster reconstruction in Z
2591 Double_t s = 9.0 * 9.0 / 12.0;
2597 //_____________________________________________________________________________
2598 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2601 // Returns radial position which corresponds to time bin <localTB>
2602 // in tracking sector <sector> and plane <plane>
2605 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane,localTB);
2606 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2608 return fTrSec[sector]->GetLayer(pl)->GetX();
2612 //_____________________________________________________________________________
2613 AliTRDtracker::AliTRDpropagationLayer
2614 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2615 , Double_t radLength, Int_t tbIndex, Int_t plane)
2624 ,fTimeBinIndex(tbIndex)
2637 // AliTRDpropagationLayer constructor
2640 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2645 if (fTimeBinIndex >= 0) {
2646 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2647 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2650 for (Int_t i = 0; i < 5; i++) {
2651 fIsHole[i] = kFALSE;
2656 //_____________________________________________________________________________
2657 AliTRDtracker::AliTRDpropagationLayer
2658 ::AliTRDpropagationLayer(const AliTRDpropagationLayer &/*p*/)
2685 //_____________________________________________________________________________
2686 void AliTRDtracker::AliTRDpropagationLayer
2687 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2688 , Double_t radLength, Double_t Yc, Double_t Zc)
2691 // Sets hole in the layer
2700 fHoleX0 = radLength;
2704 //_____________________________________________________________________________
2705 AliTRDtracker::AliTRDtrackingSector
2706 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
2712 // AliTRDtrackingSector Constructor
2715 AliTRDpadPlane *padPlane = 0;
2716 AliTRDpropagationLayer *ppl = 0;
2718 // Get holes description from geometry
2719 Bool_t holes[AliTRDgeometry::kNcham];
2720 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
2721 holes[icham] = fGeom->IsHole(0,icham,gs);
2724 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
2725 fTimeBinIndex[i] = -1;
2733 // Add layers for each of the planes
2734 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2735 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2737 const Int_t kNchambers = AliTRDgeometry::Ncham();
2740 Double_t ymaxsensitive = 0;
2741 Double_t *zc = new Double_t[kNchambers];
2742 Double_t *zmax = new Double_t[kNchambers];
2743 Double_t *zmaxsensitive = new Double_t[kNchambers];
2745 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
2747 AliErrorGeneral("AliTRDtrackingSector::Ctor"
2748 ,"Could not get common parameters\n");
2752 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
2754 ymax = fGeom->GetChamberWidth(plane) / 2.0;
2755 padPlane = commonParam->GetPadPlane(plane,0);
2756 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
2758 for (Int_t ch = 0; ch < kNchambers; ch++) {
2759 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
2760 Float_t pad = padPlane->GetRowSize(1);
2761 Float_t row0 = commonParam->GetRow0(plane,ch,0);
2762 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
2763 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
2764 zc[ch] = -(pad * nPads) / 2.0 + row0;
2767 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
2768 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
2769 rho = 0.00295 * 0.85; //????
2772 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
2773 //Double_t xbottom = x0 - dxDrift;
2774 //Double_t xtop = x0 + dxAmp;
2776 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2777 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
2779 Double_t xlayer = iTime * dx - dxAmp;
2780 //if (xlayer<0) xlayer = dxAmp / 2.0;
2783 tbIndex = CookTimeBinIndex(plane,iTime);
2784 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
2785 ppl->SetYmax(ymax,ymaxsensitive);
2786 ppl->SetZ(zc,zmax,zmaxsensitive);
2787 ppl->SetHoles(holes);
2798 delete [] zmaxsensitive;
2802 //_____________________________________________________________________________
2803 AliTRDtracker::AliTRDtrackingSector
2804 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
2815 //_____________________________________________________________________________
2816 Int_t AliTRDtracker::AliTRDtrackingSector
2817 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
2820 // Depending on the digitization parameters calculates "global"
2821 // time bin index for timebin <localTB> in plane <plane>
2825 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2826 Int_t gtb = (plane + 1) * tbPerPlane - localTB - 1;
2828 if (localTB < 0) return -1;
2829 if (gtb < 0) return -1;
2835 //_____________________________________________________________________________
2836 void AliTRDtracker::AliTRDtrackingSector
2837 ::MapTimeBinLayers()
2840 // For all sensitive time bins sets corresponding layer index
2841 // in the array fTimeBins
2846 for (Int_t i = 0; i < fN; i++) {
2848 index = fLayers[i]->GetTimeBinIndex();
2850 if(index < 0) continue;
2851 if(index >= (Int_t) kMaxTimeBinIndex) {
2852 AliWarningGeneral("AliTRDtrackingSector::MapTimeBinLayers()"
2853 ,Form("Index %d exceeds allowed maximum of %d!\n"
2854 ,index,kMaxTimeBinIndex-1));
2858 fTimeBinIndex[index] = i;
2864 //_____________________________________________________________________________
2865 Int_t AliTRDtracker::AliTRDtrackingSector
2866 ::GetLayerNumber(Double_t x) const
2869 // Returns the number of time bin which in radial position is closest to <x>
2872 if (x >= fLayers[fN-1]->GetX()) return fN - 1;
2873 if (x <= fLayers[0]->GetX()) return 0;
2877 Int_t m = (b + e) / 2;
2879 for (; b < e; m = (b + e)/ 2) {
2880 if (x > fLayers[m]->GetX()) {
2888 if (TMath::Abs(x - fLayers[m]->GetX()) >
2889 TMath::Abs(x - fLayers[m+1]->GetX())) {
2898 //_____________________________________________________________________________
2899 Int_t AliTRDtracker::AliTRDtrackingSector
2900 ::GetInnerTimeBin() const
2903 // Returns number of the innermost SENSITIVE propagation layer
2906 return GetLayerNumber(0);
2910 //_____________________________________________________________________________
2911 Int_t AliTRDtracker::AliTRDtrackingSector
2912 ::GetOuterTimeBin() const
2915 // Returns number of the outermost SENSITIVE time bin
2918 return GetLayerNumber(GetNumberOfTimeBins() - 1);
2922 //_____________________________________________________________________________
2923 Int_t AliTRDtracker::AliTRDtrackingSector
2924 ::GetNumberOfTimeBins() const
2927 // Returns number of SENSITIVE time bins
2933 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
2934 layer = GetLayerNumber(tb);
2935 if (layer >= 0) break;
2942 //_____________________________________________________________________________
2943 void AliTRDtracker::AliTRDtrackingSector
2944 ::InsertLayer(AliTRDpropagationLayer* pl)
2947 // Insert layer <pl> in fLayers array.
2948 // Layers are sorted according to X coordinate.
2951 if (fN == ((Int_t) kMaxLayersPerSector)) {
2952 AliWarningGeneral("AliTRDtrackingSector::InsertLayer"
2953 ,"Too many layers !\n");
2962 Int_t i = Find(pl->GetX());
2963 memmove(fLayers + i + 1,fLayers + i
2964 ,(fN-i)*sizeof(AliTRDpropagationLayer*));
2970 //_____________________________________________________________________________
2971 Int_t AliTRDtracker::AliTRDtrackingSector
2972 ::Find(Double_t x) const
2975 // Returns index of the propagation layer nearest to X
2978 if (x <= fLayers[0]->GetX()) return 0;
2979 if (x > fLayers[fN-1]->GetX()) return fN;
2983 Int_t m = (b + e) / 2;
2985 for (; b < e; m = (b + e) / 2) {
2986 if (x > fLayers[m]->GetX()) {
2998 //_____________________________________________________________________________
2999 void AliTRDtracker::AliTRDpropagationLayer
3000 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3003 // Set centers and the width of sectors
3006 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3008 fZc[icham] = center[icham];
3009 fZmax[icham] = w[icham];
3010 fZmaxSensitive[icham] = wsensitive[icham];
3016 //_____________________________________________________________________________
3017 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3020 // Set centers and the width of sectors
3025 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3026 fIsHole[icham] = holes[icham];
3034 //_____________________________________________________________________________
3035 void AliTRDtracker::AliTRDpropagationLayer
3036 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3039 // Insert cluster in cluster array.
3040 // Clusters are sorted according to Y coordinate.
3043 if (fTimeBinIndex < 0) {
3044 AliErrorGeneral("AliTRDpropagationLayer::InsertCluster"
3045 ,"Attempt to insert cluster into non-sensitive time bin!\n");
3049 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3050 AliErrorGeneral("AliTRDpropagationLayer::InsertCluster"
3051 ,"Too many clusters !\n");
3057 fClusters[fN++] = c;
3061 Int_t i = Find(c->GetY());
3062 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3063 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3070 //_____________________________________________________________________________
3071 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3074 // Returns index of the cluster nearest in Y
3077 if (fN <= 0) return 0;
3078 if (y <= fClusters[0]->GetY()) return 0;
3079 if (y > fClusters[fN-1]->GetY()) return fN;
3083 Int_t m = (b + e) / 2;
3085 for (; b < e; m = (b + e) / 2) {
3086 if (y > fClusters[m]->GetY()) {
3098 //_____________________________________________________________________________
3099 Int_t AliTRDtracker::AliTRDpropagationLayer
3100 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3101 , Float_t maxroadz) const
3104 // Returns index of the cluster nearest to the given y,z
3109 Float_t mindist = maxroad;
3111 for (Int_t i = Find(y - maxroad); i < maxn; i++) {
3112 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3113 Float_t ycl = c->GetY();
3114 if (ycl > y + maxroad) break;
3115 if (TMath::Abs(c->GetZ() - z) > maxroadz) continue;
3116 if (TMath::Abs(ycl - y) < mindist) {
3117 mindist = TMath::Abs(ycl - y);
3126 //_____________________________________________________________________________
3127 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c)
3130 // Returns correction factor for tilted pads geometry
3133 Int_t det = c->GetDetector();
3134 Int_t plane = fGeom->GetPlane(det);
3136 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
3138 Double_t h01 = TMath::Tan(-TMath::Pi()/180.0 * padPlane->GetTiltingAngle());
3140 if (fNoTilt) h01 = 0.0;
3146 //_____________________________________________________________________________
3147 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack& TRDtrack)
3150 // This is setting fdEdxPlane and fTimBinPlane
3151 // Sums up the charge in each plane for track TRDtrack and also get the
3152 // Time bin for Max. Cluster
3153 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
3156 Double_t clscharge[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3157 Double_t maxclscharge[AliESDtrack::kNPlane];
3158 Int_t nCluster[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3159 Int_t timebin[AliESDtrack::kNPlane];
3161 // Initialization of cluster charge per plane.
3162 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3163 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3164 clscharge[iPlane][iSlice] = 0.0;
3165 nCluster[iPlane][iSlice] = 0;
3169 // Initialization of cluster charge per plane.
3170 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3171 timebin[iPlane] = -1;
3172 maxclscharge[iPlane] = 0.0;
3175 // Loop through all clusters associated to track TRDtrack
3176 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
3177 for (Int_t iClus = 0; iClus < nClus; iClus++) {
3178 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
3179 Int_t index = TRDtrack.GetClusterIndex(iClus);
3180 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
3181 if (!pTRDcluster) continue;
3182 Int_t tb = pTRDcluster->GetLocalTimeBin();
3184 Int_t detector = pTRDcluster->GetDetector();
3185 Int_t iPlane = fGeom->GetPlane(detector);
3186 Int_t iSlice = tb * AliESDtrack::kNSlice / AliTRDtrack::kNtimeBins;
3187 clscharge[iPlane][iSlice] = clscharge[iPlane][iSlice] + charge;
3188 if(charge > maxclscharge[iPlane]) {
3189 maxclscharge[iPlane] = charge;
3190 timebin[iPlane] = tb;
3192 nCluster[iPlane][iSlice]++;
3195 // Setting the fdEdxPlane and fTimBinPlane variabales
3196 Double_t totalCharge = 0;
3197 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3198 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3199 if (nCluster[iPlane][iSlice]) {
3200 clscharge[iPlane][iSlice] /= nCluster[iPlane][iSlice];
3202 TRDtrack.SetPIDsignals(clscharge[iPlane][iSlice],iPlane,iSlice);
3203 totalCharge = totalCharge + clscharge[iPlane][iSlice];
3205 TRDtrack.SetPIDTimBin(timebin[iPlane],iPlane);
3208 // Still needed ????
3210 // Int_t nc=TRDtrack.GetNumberOfClusters();
3212 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
3214 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3215 // TRDtrack.SetPIDsignals(dedx, iPlane);
3216 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
3221 //_____________________________________________________________________________
3222 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3223 , AliTRDtrack *track
3225 , AliTRDtracklet &tracklet)
3228 // Try to find nearest clusters to the track in timebins from t0 to t1
3230 // correction coefficients
3231 // - depend on TRD parameters
3232 // - to be changed according it
3238 Double_t xmean = 0.0; // Reference x
3239 Double_t dz[10][100];
3240 Double_t dy[10][100];
3244 Int_t indexes[10][100]; // Indexes of the clusters in the road
3245 Int_t best[10][100]; // Index of best matching cluster
3247 AliTRDcluster *cl[10][100]; // Pointers to the clusters in the road
3249 for (Int_t it = 0; it < 100; it++) {
3258 for (Int_t ih = 0; ih < 10; ih++) {
3259 indexes[ih][it] = -2; // Reset indexes1
3261 dz[ih][it] = -100.0;
3262 dy[ih][it] = -100.0;
3268 AliTRDtrack track2(*track);
3269 Double_t x0 = track->GetX();
3270 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3275 Int_t detector = -1;
3276 Float_t padlength = 0.0;
3277 Float_t snpy = track->GetSnp();
3278 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3284 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
3285 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3286 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3291 for (Int_t it = 0; it < t1-t0; it++) {
3293 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3294 AliTRDpropagationLayer &timeBin= *(fTrSec[sector]->GetLayer(it+t0));
3295 if (timeBin == 0) continue; // No indexes1
3297 Int_t maxn = timeBin;
3298 x[it] = timeBin.GetX();
3299 track2.PropagateTo(x[it]);
3300 yt[it] = track2.GetY();
3301 zt[it] = track2.GetZ();
3303 Double_t y = yt[it];
3304 Double_t z = zt[it];
3305 Double_t chi2 = 1000000.0;
3309 // Find 2 nearest cluster at given time bin
3311 for (Int_t i = timeBin.Find(y-road); i < maxn; i++) {
3313 AliTRDcluster *c= (AliTRDcluster *) (timeBin[i]);
3314 h01 = GetTiltFactor(c);
3316 Int_t det = c->GetDetector();
3317 plane = fGeom->GetPlane(det);
3318 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3321 if (c->GetY() > y+road) break;
3322 if (((c->GetZ() - z) * (c->GetZ() - z)) > (12.0 * sz2)) continue;
3324 Double_t dist = TMath::Abs(c->GetZ() - z);
3325 if (dist > (0.5 * padlength + 6.0 * sigmaz)) continue; // 6 sigma boundary cut
3326 Double_t cost = 0.0;
3327 // Sigma boundary cost function
3328 if (dist > (0.5 * padlength - sigmaz)) {
3329 cost = (dist - 0.5 * padlength) / (2.0 * sigmaz);
3331 cost = (cost + 1.0) * (cost + 1.0);
3337 // Still needed ????
3338 //Int_t label = TMath::Abs(track->GetLabel());
3339 //if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
3340 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3343 if (chi2 > maxChi2[1]) continue;
3344 detector = c->GetDetector();
3346 // Store the clusters in the road
3347 for (Int_t ih = 2; ih < 9; ih++) {
3348 if (cl[ih][it] == 0) {
3350 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3355 if (chi2 < maxChi2[0]) {
3356 maxChi2[1] = maxChi2[0];
3358 indexes[1][it] = indexes[0][it];
3359 cl[1][it] = cl[0][it];
3360 indexes[0][it] = timeBin.GetIndex(i);
3366 indexes[1][it] = timeBin.GetIndex(i);
3377 if (nfound < 4) return 0;
3378 xmean /= Float_t(nfound); // Middle x
3379 track2.PropagateTo(xmean); // Propagate track to the center
3382 // Choose one of the variants
3388 Double_t sumdy2 = 0;
3398 Double_t moffset[10]; // Mean offset
3399 Double_t mean[10]; // Mean value
3400 Double_t angle[10]; // Angle
3402 Double_t smoffset[10]; // Sigma of mean offset
3403 Double_t smean[10]; // Sigma of mean value
3404 Double_t sangle[10]; // Sigma of angle
3405 Double_t smeanangle[10]; // Correlation
3407 Double_t sigmas[10];
3408 Double_t tchi2s[10]; // Chi2s for tracklet
3410 for (Int_t it = 0; it < 10; it++) {
3416 moffset[it] = 0.0; // Mean offset
3417 mean[it] = 0.0; // Mean value
3418 angle[it] = 0.0; // Angle
3420 smoffset[it] = 1.0e10; // Sigma of mean offset
3421 smean[it] = 1.0e10; // Sigma of mean value
3422 sangle[it] = 1.0e10; // Sigma of angle
3423 smeanangle[it] = 0.0; // Correlation
3425 sigmas[it] = 1.0e10;
3426 tchi2s[it] = 1.0e10; // Chi2s for tracklet
3433 for (Int_t it = 0; it < t1-t0; it++) {
3435 if (!cl[0][it]) continue;
3437 for (Int_t dt = -3; dt <= 3; dt++) {
3438 if (it+dt < 0) continue;
3439 if (it+dt > t1-t0) continue;
3440 if (!cl[0][it+dt]) continue;
3441 zmean[it] += cl[0][it+dt]->GetZ();
3444 zmean[it] /= nmean[it];
3448 for (Int_t it = 0; it < t1-t0; it++) {
3451 for (Int_t ih = 0; ih < 10; ih++) {
3453 dz[ih][it] = -100.0;
3454 dy[ih][it] = -100.0;
3455 if (!cl[ih][it]) continue;
3456 Double_t xcluster = cl[ih][it]->GetX();
3459 track2.GetProlongation(xcluster,ytrack,ztrack);
3460 dz[ih][it] = cl[ih][it]->GetZ() - ztrack; // Calculate z-distance from track
3461 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // Calculate y-distance from track
3466 if (!cl[0][it]) continue;
3467 if ((TMath::Abs(cl[0][it]->GetZ() - zmean[it]) > padlength * 0.8) &&
3469 if (TMath::Abs(cl[1][it]->GetZ() - zmean[it]) < padlength * 0.5) {
3476 // Iterative choice of "best path"
3478 Int_t label = TMath::Abs(track->GetLabel());
3481 for (Int_t iter = 0; iter < 9; iter++) {
3496 for (Int_t it = 0; it < t1-t0; it++) {
3498 if (!cl[best[iter][it]][it]) continue;
3500 // Calculates pad-row changes
3501 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3502 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3503 for (Int_t itd = it-1; itd >= 0; itd--) {
3504 if (cl[best[iter][itd]][itd]) {
3505 zbefore = cl[best[iter][itd]][itd]->GetZ();
3509 for (Int_t itd = it+1; itd < t1-t0; itd++) {
3510 if (cl[best[iter][itd]][itd]) {
3511 zafter = cl[best[iter][itd]][itd]->GetZ();
3515 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ() - zbefore) > 0.1) &&
3516 (TMath::Abs(cl[best[iter][it]][it]->GetZ() - zafter) > 0.1)) {
3520 // Distance to reference x
3521 Double_t dx = x[it]-xmean;
3522 sumz += cl[best[iter][it]][it]->GetZ();
3524 sumdy += dy[best[iter][it]][it];
3525 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3528 sumxy += dx*dy[best[iter][it]][it];
3529 mpads += cl[best[iter][it]][it]->GetNPads();
3530 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3531 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3532 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3542 // Calculates line parameters
3544 Double_t det = sum * sumx2 - sumx * sumx;
3545 angle[iter] = (sum * sumxy - sumx * sumdy) / det;
3546 mean[iter] = (sumx2 * sumdy - sumx * sumxy) / det;
3547 meanz[iter] = sumz / sum;
3548 moffset[iter] = sumdy / sum;
3549 mpads /= sum; // Mean number of pads
3551 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3552 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3554 for (Int_t it = 0; it < t1-t0; it++) {
3555 if (!cl[best[iter][it]][it]) continue;
3556 Double_t dx = x[it] - xmean;
3557 Double_t ytr = mean[iter] + angle[iter] * dx;
3558 sigma2 += (dy[best[iter][it]][it] - ytr)
3559 * (dy[best[iter][it]][it] - ytr);
3560 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3561 * (dy[best[iter][it]][it] - moffset[iter]);
3565 sigma2 /= (sum - 2.0); // Normalized residuals
3566 sigma1 /= (sum - 1.0); // Normalized residuals
3568 smean[iter] = sigma2 * (sumx2/det); // Estimated error2 of mean
3569 sangle[iter] = sigma2 * ( sum/det); // Estimated error2 of angle
3570 smeanangle[iter] = sigma2 * (-sumx/det); // Correlation
3572 sigmas[iter] = TMath::Sqrt(sigma1);
3573 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3576 // Iterative Choice of "better path"
3578 for (Int_t it = 0; it < t1-t0; it++) {
3580 if (!cl[best[iter][it]][it]) continue;
3582 // Add unisochronity + angular effect contribution
3583 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3584 Double_t sweight = 1.0 / sigmatr2 + 1.0 / track->GetSigmaY2();
3585 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3586 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3587 Double_t mindist = 100000.0;
3589 for (Int_t ih = 0; ih < 10; ih++) {
3590 if (!cl[ih][it]) break;
3591 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3592 dist2 *= dist2; // Chi2 distance
3593 if (dist2 < mindist) {
3598 best[iter+1][it] = ihbest;
3603 // Update best hypothesy if better chi2 according tracklet position and angle
3605 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3606 Double_t sa2 = sangle[iter] + track->fCee;
3607 Double_t say = track->fCey;
3608 //Double_t chi20 = mean[bestiter]*mean[bestiter]/sy2+angle[bestiter]*angle[bestiter]/sa2;
3609 //Double_t chi21 = mean[iter]*mean[iter]/sy2+angle[iter]*angle[iter]/sa2;
3611 Double_t detchi = sy2*sa2 - say*say;
3612 // Inverse value of covariance matrix
3613 Double_t invers[3] = { sa2/detchi, sy2/detchi, -say/detchi};
3615 Double_t chi20 = mean[bestiter]*mean[bestiter] * invers[0]
3616 + angle[bestiter]*angle[bestiter] * invers[1]
3617 + 2.0 * mean[bestiter]*angle[bestiter] * invers[2];
3618 Double_t chi21 = mean[iter]*mean[iter] * invers[0]
3619 + angle[iter]*angle[iter] * invers[1]
3620 + 2.0 * mean[iter]*angle[iter] * invers[2];
3621 tchi2s[iter] = chi21;
3623 if ((changes[iter] <= changes[bestiter]) &&
3633 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
3634 Short_t maxpos = -1;
3635 Float_t maxcharge = 0.0;
3636 Short_t maxpos4 = -1;
3637 Float_t maxcharge4 = 0.0;
3638 Short_t maxpos5 = -1;
3639 Float_t maxcharge5 = 0.0;
3641 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
3642 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
3644 Double_t vD = AliTRDcalibDB::Instance()->GetVdrift(0,0,0);
3645 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vD);
3646 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
3648 expectederr += (mpads - 3.5) * 0.04;
3650 if (changes[bestiter] > 1) {
3651 expectederr += changes[bestiter] * 0.01;
3653 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
3654 //if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
3655 //expectederr+=10000;
3657 for (Int_t it = 0; it < t1-t0; it++) {
3659 if (!cl[best[bestiter][it]][it]) continue;
3660 // Set cluster error
3661 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr);
3662 if (!cl[best[bestiter][it]][it]->IsUsed()) {
3663 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
3664 //cl[best[bestiter][it]][it]->Use();
3667 // Time bins with maximal charge
3668 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge ) {
3669 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3670 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3672 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3673 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3674 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3675 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3678 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3679 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3680 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3681 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3685 // Time bins with maximal charge
3686 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge ) {
3687 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3688 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3690 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3691 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3692 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3693 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3696 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3697 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3698 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3699 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3703 clusters[it+t0] = indexes[best[bestiter][it]][it];
3708 // Set tracklet parameters
3710 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
3712 trackleterr2 += (mpads - 3.5) * 0.04;
3714 trackleterr2 += changes[bestiter] * 0.01;
3715 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
3716 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
3719 ,track2.GetY()+moffset[bestiter]
3723 tracklet.SetTilt(h01);
3724 tracklet.SetP0(mean[bestiter]);
3725 tracklet.SetP1(angle[bestiter]);
3726 tracklet.SetN(nfound);
3727 tracklet.SetNCross(changes[bestiter]);
3728 tracklet.SetPlane(plane);
3729 tracklet.SetSigma2(expectederr);
3730 tracklet.SetChi2(tchi2s[bestiter]);
3731 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
3732 track->fTracklets[plane] = tracklet;
3733 track->fNWrong += nbad[0];
3738 TClonesArray array0("AliTRDcluster");
3739 TClonesArray array1("AliTRDcluster");
3740 array0.ExpandCreateFast(t1 - t0 + 1);
3741 array1.ExpandCreateFast(t1 - t0 + 1);
3742 TTreeSRedirector &cstream = *fDebugStreamer;
3743 AliTRDcluster dummy;
3747 for (Int_t it = 0; it < t1-t0; it++) {
3749 dy0[it] = dy[0][it];
3750 dyb[it] = dy[best[bestiter][it]][it];
3752 new(array0[it]) AliTRDcluster(*cl[0][it]);
3755 new(array0[it]) AliTRDcluster(dummy);
3757 if(cl[best[bestiter][it]][it]) {
3758 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
3761 new(array1[it]) AliTRDcluster(dummy);
3766 TGraph graph0(t1-t0,x,dy0);
3767 TGraph graph1(t1-t0,x,dyb);
3768 TGraph graphy(t1-t0,x,yt);
3769 TGraph graphz(t1-t0,x,zt);
3771 if (AliTRDReconstructor::StreamLevel() > 0) {
3772 cstream << "tracklet"
3773 << "track.=" << track // Track parameters
3774 << "tany=" << tany // Tangent of the local track angle
3775 << "xmean=" << xmean // xmean - reference x of tracklet
3776 << "tilt=" << h01 // Tilt angle
3777 << "nall=" << nall // Number of foundable clusters
3778 << "nfound=" << nfound // Number of found clusters
3779 << "clfound=" << clfound // Total number of found clusters in road
3780 << "mpads=" << mpads // Mean number of pads per cluster
3781 << "plane=" << plane // Plane number
3782 << "detector=" << detector // Detector number
3783 << "road=" << road // The width of the used road
3784 << "graph0.=" << &graph0 // x - y = dy for closest cluster
3785 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
3786 << "graphy.=" << &graphy // y position of the track
3787 << "graphz.=" << &graphz // z position of the track
3788 //<< "fCl.=" << &array0 // Closest cluster
3789 //<< "fCl2.=" << &array1 // Second closest cluster
3790 << "maxpos=" << maxpos // Maximal charge postion
3791 << "maxcharge=" << maxcharge // Maximal charge
3792 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
3793 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
3794 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
3795 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
3796 << "bestiter=" << bestiter // Best iteration number
3797 << "tracklet.=" << &tracklet // Corrspond to the best iteration
3798 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
3799 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
3800 << "sigmas0=" << sigmas[0] // Residuals sigma
3801 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
3802 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
3803 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
3804 << "ngoodb=" << ngood[bestiter] // Number of bad clusters in best iteration
3805 << "nbadb=" << nbad[bestiter] // Number of good clusters in best iteration
3806 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
3807 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
3808 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
3809 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
3810 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
3811 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
3812 << "mean0=" << mean[0] // Mean dy in iter=0;
3813 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
3814 << "meanb=" << mean[bestiter] // Mean dy in iter=best
3815 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
3816 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
3817 << "sangle0=" << sangle[0] // Sigma of angular deviation in iter=0
3818 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
3819 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
3820 << "expectederr=" << expectederr // Expected error of cluster position
3828 //_____________________________________________________________________________
3829 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
3830 , Int_t *outlist, Bool_t down)
3833 // Sort eleements according occurancy
3834 // The size of output array has is 2*n
3837 Int_t *sindexS = new Int_t[n]; // Temp array for sorting
3838 Int_t *sindexF = new Int_t[2*n];
3839 for (Int_t i = 0; i < n; i++) {
3843 TMath::Sort(n,inlist,sindexS,down);
3844 Int_t last = inlist[sindexS[0]];
3847 sindexF[0+n] = last;
3851 for (Int_t i = 1; i < n; i++) {
3852 val = inlist[sindexS[i]];
3854 sindexF[countPos]++;
3858 sindexF[countPos+n] = val;
3859 sindexF[countPos]++;
3863 if (last == val) countPos++;
3865 // Sort according frequency
3866 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
3867 for (Int_t i = 0; i < countPos; i++) {
3868 outlist[2*i ] = sindexF[sindexS[i]+n];
3869 outlist[2*i+1] = sindexF[sindexS[i]];
3879 //_____________________________________________________________________________
3880 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
3886 Double_t alpha = AliTRDgeometry::GetAlpha();
3887 Double_t shift = AliTRDgeometry::GetAlpha() / 2.0;
3891 c[ 1] = 0.0; c[ 2] = 2.0;
3892 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
3893 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
3894 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
3897 AliTRDcluster *cl = 0;
3899 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
3900 if (seeds[ilayer].IsOK()) {
3901 for (Int_t itime = 22; itime > 0; itime--) {
3902 if (seeds[ilayer].fIndexes[itime] > 0) {
3903 index = seeds[ilayer].fIndexes[itime];
3904 cl = seeds[ilayer].fClusters[itime];
3909 if (index > 0) break;
3911 if (cl == 0) return 0;
3913 AliTRDtrack *track = new AliTRDtrack(cl
3918 ,params[6]*alpha+shift);
3919 track->PropagateTo(params[0]-5.0);
3920 track->ResetCovariance(1);
3922 Int_t rc = FollowBackProlongation(*track);
3929 CookdEdxTimBin(*track);
3930 CookLabel(track,0.9);