1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // The standard TRD tracker //
21 // Based on Kalman filltering approach //
24 // M. Ivanov (Marian.Ivanov@cern.ch) //
25 // Y. Belikov (Jouri.Belikov@cern.ch) //
27 ///////////////////////////////////////////////////////////////////////////////
29 #include <Riostream.h>
33 #include <TObjArray.h>
34 #include <TTreeStream.h>
36 #include <TLinearFitter.h>
39 #include "AliAlignObj.h"
40 #include "AliRieman.h"
41 #include "AliTrackPointArray.h"
43 #include "AliTRDgeometry.h"
44 #include "AliTRDpadPlane.h"
45 #include "AliTRDgeometry.h"
46 #include "AliTRDcluster.h"
47 #include "AliTRDtrack.h"
48 #include "AliTRDseed.h"
49 #include "AliTRDcalibDB.h"
50 #include "AliTRDCommonParam.h"
51 #include "AliTRDtracker.h"
52 #include "AliTRDReconstructor.h"
54 ClassImp(AliTRDtracker)
56 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
57 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
58 const Double_t AliTRDtracker::fgkMaxChi2 = 12.0;
59 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // Corresponds to tan = 3
60 const Double_t AliTRDtracker::fgkMaxStep = 2.0; // Maximal step size in propagation
62 //_____________________________________________________________________________
63 AliTRDtracker::AliTRDtracker()
78 // Default constructor
81 for (Int_t i = 0; i < kTrackingSectors; i++) {
84 for (Int_t j = 0; j < 5; j++) {
85 for (Int_t k = 0; k < 18; k++) {
86 fHoles[j][k] = kFALSE;
92 //_____________________________________________________________________________
93 AliTRDtracker::AliTRDtracker(const AliTRDtracker &t)
102 ,fTimeBinsPerPlane(0)
103 ,fAddTRDseeds(kFALSE)
112 //_____________________________________________________________________________
113 AliTRDtracker::AliTRDtracker(const TFile *geomfile)
117 ,fClusters(new TObjArray(2000))
119 ,fSeeds(new TObjArray(2000))
121 ,fTracks(new TObjArray(1000))
122 ,fTimeBinsPerPlane(0)
123 ,fAddTRDseeds(kFALSE)
131 TDirectory *savedir = gDirectory;
132 TFile *in = (TFile *) geomfile;
135 AliWarning("geometry file is not open!\n");
136 AliWarning("FULL TRD geometry and DEFAULT TRD parameter will be used\n");
140 fGeom = (AliTRDgeometry *) in->Get("TRDgeometry");
144 AliWarning("Cannot find TRD geometry!\n");
145 fGeom = new AliTRDgeometry();
147 fGeom->ReadGeoMatrices();
151 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
152 Int_t trS = CookSectorIndex(geomS);
153 fTrSec[trS] = new AliTRDtrackingSector(fGeom,geomS);
154 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
155 fHoles[icham][trS] = fGeom->IsHole(0,icham,geomS);
159 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
160 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
161 if (tiltAngle < 0.1) {
165 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
167 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
173 //_____________________________________________________________________________
174 AliTRDtracker::~AliTRDtracker()
177 // Destructor of AliTRDtracker
197 for (Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
198 delete fTrSec[geomS];
201 if (fDebugStreamer) {
202 delete fDebugStreamer;
207 //_____________________________________________________________________________
208 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid)
211 // Transform internal TRD ID to global detector ID
214 Int_t isector = fGeom->GetSector(lid);
215 Int_t ichamber = fGeom->GetChamber(lid);
216 Int_t iplan = fGeom->GetPlane(lid);
218 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
221 iLayer = AliAlignObj::kTRD1;
224 iLayer = AliAlignObj::kTRD2;
227 iLayer = AliAlignObj::kTRD3;
230 iLayer = AliAlignObj::kTRD4;
233 iLayer = AliAlignObj::kTRD5;
236 iLayer = AliAlignObj::kTRD6;
240 Int_t modId = isector * fGeom->Ncham() + ichamber;
241 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
247 //_____________________________________________________________________________
248 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid)
251 // Transform global detector ID to local detector ID
255 AliAlignObj::ELayerID layerId = AliAlignObj::VolUIDToLayer(gid,modId);
257 Int_t isector = modId / fGeom->Ncham();
258 Int_t ichamber = modId % fGeom->Ncham();
262 case AliAlignObj::kTRD1:
265 case AliAlignObj::kTRD2:
268 case AliAlignObj::kTRD3:
271 case AliAlignObj::kTRD4:
274 case AliAlignObj::kTRD5:
277 case AliAlignObj::kTRD6:
288 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
294 //_____________________________________________________________________________
295 Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
298 // Transform something ... whatever ...
301 // Magic constants for geo manager transformation
302 const Double_t kX0shift = 2.52;
303 const Double_t kX0shift5 = 3.05;
306 // Apply alignment and calibration to transform cluster
308 Int_t detector = cluster->GetDetector();
309 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
310 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
311 Int_t sector = fGeom->GetSector(cluster->GetDetector());
313 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
314 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.0); // Drift distance
319 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
320 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
322 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
323 AliTRDpadPlane *padPlane = commonParam->GetPadPlane(plane,chamber);
324 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
325 Double_t localPos[3];
326 Double_t localPosTracker[3];
327 localPos[0] = -cluster->GetX();
328 localPos[1] = cluster->GetY() - driftX * exB;
329 localPos[2] = cluster->GetZ() - zshiftIdeal;
331 cluster->SetY(cluster->GetY() - driftX*exB);
332 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
333 cluster->SetX(xplane- cluster->GetX());
335 TGeoHMatrix *matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
337 // No matrix found - if somebody used geometry with holes
338 AliError("Invalid Geometry - Default Geometry used\n");
341 matrix->LocalToMaster(localPos,localPosTracker);
343 if (AliTRDReconstructor::StreamLevel() > 1) {
344 (* fDebugStreamer) << "Transform"
346 << "matrix.=" << matrix
347 << "Detector=" << detector
348 << "Sector=" << sector
350 << "Chamber=" << chamber
351 << "lx0=" << localPosTracker[0]
352 << "ly0=" << localPosTracker[1]
353 << "lz0=" << localPosTracker[2]
358 cluster->SetX(localPosTracker[0]+kX0shift5);
361 cluster->SetX(localPosTracker[0]+kX0shift);
364 cluster->SetY(localPosTracker[1]);
365 cluster->SetZ(localPosTracker[2]);
371 //_____________________________________________________________________________
372 // Bool_t AliTRDtracker::Transform(AliTRDcluster *cluster)
375 // // Is this still needed ????
377 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
378 // const Double_t kTime0Cor = 0.32; // time0 correction
380 // const Double_t kX0shift = 2.52;
381 // const Double_t kX0shift5 = 3.05;
384 // // apply alignment and calibration to transform cluster
387 // Int_t detector = cluster->GetDetector();
388 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
389 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
390 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
392 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
393 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
397 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
398 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
401 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
402 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
403 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
404 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
405 // localPos[2] = -cluster->GetX();
406 // localPos[0] = cluster->GetY() - driftX*exB;
407 // localPos[1] = cluster->GetZ() -zshiftIdeal;
408 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
409 // matrix->LocalToMaster(localPos, globalPos);
411 // Double_t sectorAngle = 20.*(sector%18)+10;
412 // TGeoHMatrix rotSector;
413 // rotSector.RotateZ(sectorAngle);
414 // rotSector.LocalToMaster(globalPos, localPosTracker);
417 // TGeoHMatrix matrix2(*matrix);
418 // matrix2.MultiplyLeft(&rotSector);
419 // matrix2.LocalToMaster(localPos,localPosTracker2);
423 // cluster->SetY(cluster->GetY() - driftX*exB);
424 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
425 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
426 // (*fDebugStreamer)<<"Transform"<<
428 // "matrix.="<<matrix<<
429 // "matrix2.="<<&matrix2<<
430 // "Detector="<<detector<<
431 // "Sector="<<sector<<
433 // "Chamber="<<chamber<<
434 // "lx0="<<localPosTracker[0]<<
435 // "ly0="<<localPosTracker[1]<<
436 // "lz0="<<localPosTracker[2]<<
437 // "lx2="<<localPosTracker2[0]<<
438 // "ly2="<<localPosTracker2[1]<<
439 // "lz2="<<localPosTracker2[2]<<
443 // cluster->SetX(localPosTracker[0]+kX0shift5);
445 // cluster->SetX(localPosTracker[0]+kX0shift);
447 // cluster->SetY(localPosTracker[1]);
448 // cluster->SetZ(localPosTracker[2]);
452 //_____________________________________________________________________________
453 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track)
456 // Rotates the track when necessary
459 Double_t alpha = AliTRDgeometry::GetAlpha();
460 Double_t y = track->GetY();
461 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
463 // Is this still needed ????
464 //Int_t ns = AliTRDgeometry::kNsect;
465 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
469 if (!track->Rotate( alpha)) {
473 else if (y < -ymax) {
475 if (!track->Rotate(-alpha)) {
484 //_____________________________________________________________________________
485 AliTRDcluster *AliTRDtracker::GetCluster(AliTRDtrack *track, Int_t plane
486 , Int_t timebin, UInt_t &index)
489 // Try to find cluster in the backup list
492 AliTRDcluster *cl =0;
493 Int_t *indexes = track->GetBackupIndexes();
495 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
496 if (indexes[i] == 0) {
499 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
503 if (cli->GetLocalTimeBin() != timebin) {
506 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
507 if (iplane == plane) {
518 //_____________________________________________________________________________
519 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack *track)
522 // Return last updated plane
526 Int_t *indexes = track->GetBackupIndexes();
528 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
529 AliTRDcluster *cli = (AliTRDcluster *) fClusters->UncheckedAt(indexes[i]);
533 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
534 if (iplane > lastplane) {
543 //_____________________________________________________________________________
544 Int_t AliTRDtracker::Clusters2Tracks(AliESD *event)
547 // Finds tracks within the TRD. The ESD event is expected to contain seeds
548 // at the outer part of the TRD. The seeds
549 // are found within the TRD if fAddTRDseeds is TRUE.
550 // The tracks are propagated to the innermost time bin
551 // of the TRD and the ESD event is updated
554 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
555 Float_t foundMin = fgkMinClustersInTrack * timeBins;
558 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
560 Int_t n = event->GetNumberOfTracks();
561 for (Int_t i = 0; i < n; i++) {
563 AliESDtrack *seed = event->GetTrack(i);
564 ULong_t status = seed->GetStatus();
565 if ((status & AliESDtrack::kTRDout) == 0) {
568 if ((status & AliESDtrack::kTRDin) != 0) {
573 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
574 //seed2->ResetCovariance();
575 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
576 AliTRDtrack &t = *pt;
577 FollowProlongation(t);
578 if (t.GetNumberOfClusters() >= foundMin) {
580 CookLabel(pt,1 - fgkLabelFraction);
585 Double_t xTPC = 250.0;
586 if (PropagateToX(t,xTPC,fgkMaxStep)) {
587 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
594 AliInfo(Form("Number of loaded seeds: %d",nseed));
595 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
596 AliInfo(Form("Total number of found tracks: %d",found));
602 //_____________________________________________________________________________
603 Int_t AliTRDtracker::PropagateBack(AliESD *event)
606 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
607 // backpropagated by the TPC tracker. Each seed is first propagated
608 // to the TRD, and then its prolongation is searched in the TRD.
609 // If sufficiently long continuation of the track is found in the TRD
610 // the track is updated, otherwise it's stored as originaly defined
611 // by the TPC tracker.
615 Float_t foundMin = 20.0;
616 Int_t n = event->GetNumberOfTracks();
619 Float_t *quality = new Float_t[n];
620 Int_t *index = new Int_t[n];
621 for (Int_t i = 0; i < n; i++) {
622 AliESDtrack *seed = event->GetTrack(i);
623 Double_t covariance[15];
624 seed->GetExternalCovariance(covariance);
625 quality[i] = covariance[0]+covariance[2];
627 TMath::Sort(n,quality,index,kFALSE);
629 for (Int_t i = 0; i < n; i++) {
631 //AliESDtrack *seed = event->GetTrack(i);
632 AliESDtrack *seed = event->GetTrack(index[i]);
634 ULong_t status = seed->GetStatus();
635 if ((status & AliESDtrack::kTPCout) == 0) {
638 if ((status & AliESDtrack::kTRDout) != 0) {
642 Int_t lbl = seed->GetLabel();
643 AliTRDtrack *track = new AliTRDtrack(*seed);
644 track->SetSeedLabel(lbl);
645 seed->UpdateTrackParams(track,AliESDtrack::kTRDbackup); // Make backup
647 Float_t p4 = track->GetC();
649 Int_t expectedClr = FollowBackProlongation(*track);
650 if ((TMath::Abs(track->GetC() - p4) / TMath::Abs(p4) < 0.2) ||
651 (TMath::Abs(track->GetPt()) > 0.8)) {
654 // Make backup for back propagation
657 Int_t foundClr = track->GetNumberOfClusters();
658 if (foundClr >= foundMin) {
660 CookdEdxTimBin(*track);
661 CookLabel(track,1 - fgkLabelFraction);
662 if (track->GetBackupTrack()) {
663 UseClusters(track->GetBackupTrack());
666 // Sign only gold tracks
667 if (track->GetChi2() / track->GetNumberOfClusters() < 4) {
668 if ((seed->GetKinkIndex(0) == 0) &&
669 (TMath::Abs(track->GetPt()) < 1.5)) {
673 Bool_t isGold = kFALSE;
676 if (track->GetChi2() / track->GetNumberOfClusters() < 5) {
677 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
678 if (track->GetBackupTrack()) {
679 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
686 (track->GetNCross() == 0) &&
687 (track->GetChi2() / track->GetNumberOfClusters() < 7)) {
688 //seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
689 if (track->GetBackupTrack()) {
690 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
696 (track->GetBackupTrack())) {
697 if ((track->GetBackupTrack()->GetNumberOfClusters() > foundMin) &&
698 ((track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1)) < 7)) {
699 seed->UpdateTrackParams(track->GetBackupTrack(),AliESDtrack::kTRDbackup);
704 if ((track->StatusForTOF() > 0) &&
705 (track->fNCross == 0) &&
706 (Float_t(track->fN)/Float_t(track->fNExpected) > 0.4)) {
707 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
714 // Debug part of tracking
715 TTreeSRedirector &cstream = *fDebugStreamer;
716 Int_t eventNr = event->GetEventNumber();
717 if (AliTRDReconstructor::StreamLevel() > 0) {
718 if (track->GetBackupTrack()) {
720 << "EventNr=" << eventNr
723 << "trdback.=" << track->GetBackupTrack()
728 << "EventNr=" << eventNr
731 << "trdback.=" << track
736 // Propagation to the TOF (I.Belikov)
737 if (track->GetStop() == kFALSE) {
739 Double_t xtof = 371.0;
740 Double_t c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
741 if (TMath::Abs(c2) >= 0.99) {
745 Double_t xTOF0 = 370.0;
746 PropagateToX(*track,xTOF0,fgkMaxStep);
748 // Energy losses taken to the account - check one more time
749 c2 = track->GetSnp() + track->GetC() * (xtof - track->GetX());
750 if (TMath::Abs(c2) >= 0.99) {
755 Double_t ymax = xtof * TMath::Tan(0.5 * AliTRDgeometry::GetAlpha());
757 track->GetYAt(xtof,GetBz(),y);
759 if (!track->Rotate( AliTRDgeometry::GetAlpha())) {
764 else if (y < -ymax) {
765 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
771 if (track->PropagateTo(xtof)) {
772 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
773 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
774 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
775 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
777 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
779 //seed->SetTRDtrack(new AliTRDtrack(*track));
780 if (track->GetNumberOfClusters() > foundMin) {
788 if ((track->GetNumberOfClusters() > 15) &&
789 (track->GetNumberOfClusters() > 0.5*expectedClr)) {
790 seed->UpdateTrackParams(track,AliESDtrack::kTRDout);
791 //seed->SetStatus(AliESDtrack::kTRDStop);
792 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
793 for (Int_t j = 0; j <AliESDtrack::kNSlice; j++) {
794 seed->SetTRDsignals(track->GetPIDsignals(i,j),i,j);
796 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
798 //seed->SetTRDtrack(new AliTRDtrack(*track));
804 seed->SetTRDQuality(track->StatusForTOF());
805 seed->SetTRDBudget(track->fBudget[0]);
811 AliInfo(Form("Number of seeds: %d",fNseeds));
812 AliInfo(Form("Number of back propagated TRD tracks: %d",found));
815 if (AliTRDReconstructor::SeedingOn()) {
816 MakeSeedsMI(3,5,event);
829 //_____________________________________________________________________________
830 Int_t AliTRDtracker::RefitInward(AliESD *event)
833 // Refits tracks within the TRD. The ESD event is expected to contain seeds
834 // at the outer part of the TRD.
835 // The tracks are propagated to the innermost time bin
836 // of the TRD and the ESD event is updated
837 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
840 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
841 Float_t foundMin = fgkMinClustersInTrack * timeBins;
844 //Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
847 Int_t n = event->GetNumberOfTracks();
848 for (Int_t i = 0; i < n; i++) {
850 AliESDtrack *seed = event->GetTrack(i);
851 new (&seed2) AliTRDtrack(*seed);
852 if (seed2.GetX() < 270.0) {
853 seed->UpdateTrackParams(&seed2,AliESDtrack::kTRDbackup); // Backup TPC track - only update
857 ULong_t status = seed->GetStatus();
858 if ((status & AliESDtrack::kTRDout) == 0) {
861 if ((status & AliESDtrack::kTRDin) != 0) {
866 seed2.ResetCovariance(50.0);
868 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
869 Int_t *indexes2 = seed2.GetIndexes();
870 for (Int_t i = 0; i < AliESDtrack::kNPlane;i++) {
871 for (Int_t j = 0; j < AliESDtrack::kNSlice;j++) {
872 pt->SetPIDsignals(seed2.GetPIDsignals(i,j),i,j);
874 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
877 Int_t *indexes3 = pt->GetBackupIndexes();
878 for (Int_t i = 0; i < 200;i++) {
879 if (indexes2[i] == 0) {
882 indexes3[i] = indexes2[i];
885 //AliTRDtrack *pt = seed2;
886 AliTRDtrack &t = *pt;
887 FollowProlongation(t);
888 if (t.GetNumberOfClusters() >= foundMin) {
890 //CookLabel(pt, 1-fgkLabelFraction);
896 Double_t xTPC = 250.0;
897 if (PropagateToX(t,xTPC,fgkMaxStep)) {
898 seed->UpdateTrackParams(pt,AliESDtrack::kTRDrefit);
899 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
900 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
901 seed->SetTRDsignals(pt->GetPIDsignals(i,j),i,j);
903 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
907 // If not prolongation to TPC - propagate without update
908 AliTRDtrack *seed2 = new AliTRDtrack(*seed);
909 seed2->ResetCovariance(5.0);
910 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
912 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
914 CookdEdxTimBin(*pt2);
915 seed->UpdateTrackParams(pt2,AliESDtrack::kTRDrefit);
916 for (Int_t i = 0; i < AliESDtrack::kNPlane; i++) {
917 for (Int_t j = 0; j < AliESDtrack::kNSlice; j++) {
918 seed->SetTRDsignals(pt2->GetPIDsignals(i,j),i,j);
920 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
930 AliInfo(Form("Number of loaded seeds: %d",nseed));
931 AliInfo(Form("Number of found tracks from loaded seeds: %d",found));
937 //_____________________________________________________________________________
938 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack &t)
941 // Starting from current position on track=t this function tries
942 // to extrapolate the track up to timeBin=0 and to confirm prolongation
943 // if a close cluster is found. Returns the number of clusters
944 // expected to be found in sensitive layers
945 // GeoManager used to estimate mean density
949 Int_t lastplane = GetLastPlane(&t);
950 Double_t radLength = 0.0;
952 Int_t expectedNumberOfClusters = 0;
954 for (Int_t iplane = lastplane; iplane >= 0; iplane--) {
956 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
957 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
960 // Propagate track close to the plane if neccessary
962 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
963 if (currentx < (-fgkMaxStep + t.GetX())) {
964 // Propagate closer to chamber - safety space fgkMaxStep
965 if (!PropagateToX(t,currentx+fgkMaxStep,fgkMaxStep)) {
970 if (!AdjustSector(&t)) {
975 // Get material budget
984 // Starting global position
986 // End global position
987 x = fTrSec[0]->GetLayer(row0)->GetX();
988 if (!t.GetProlongation(x,y,z)) {
991 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
992 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
994 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
996 radLength = param[1]; // Get mean propagation parameters
999 // Propagate and update
1001 sector = t.GetSector();
1002 //for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
1003 for (Int_t itime = 0 ; itime < GetTimeBinsPerPlane(); itime++) {
1005 Int_t ilayer = GetGlobalTimeBin(0,iplane,itime);
1006 expectedNumberOfClusters++;
1008 if (t.GetX() > 345.0) {
1011 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1012 AliTRDcluster *cl = 0;
1014 Double_t maxChi2 = fgkMaxChi2;
1019 AliTRDcluster *cl0 = timeBin[0];
1021 // No clusters in given time bin
1025 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1026 if (plane > lastplane) {
1030 Int_t timebin = cl0->GetLocalTimeBin();
1031 AliTRDcluster *cl2 = GetCluster(&t,plane,timebin,index);
1036 //Double_t h01 = GetTiltFactor(cl); //I.B's fix
1037 //maxChi2=t.GetPredictedChi2(cl,h01);
1042 //if (cl->GetNPads()<5)
1043 Double_t dxsample = timeBin.GetdX();
1044 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1045 Double_t h01 = GetTiltFactor(cl);
1046 Int_t det = cl->GetDetector();
1047 Int_t plane = fGeom->GetPlane(det);
1048 if (t.GetX() > 345.0) {
1050 t.fChi2Last += maxChi2;
1053 Double_t xcluster = cl->GetX();
1054 t.PropagateTo(xcluster,radLength,rho);
1056 if (!AdjustSector(&t)) {
1059 maxChi2 = t.GetPredictedChi2(cl,h01);
1061 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1073 return expectedNumberOfClusters;
1077 //_____________________________________________________________________________
1078 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack &t)
1081 // Starting from current radial position of track <t> this function
1082 // extrapolates the track up to outer timebin and in the sensitive
1083 // layers confirms prolongation if a close cluster is found.
1084 // Returns the number of clusters expected to be found in sensitive layers
1085 // Use GEO manager for material Description
1089 Int_t clusters[1000];
1090 Double_t radLength = 0.0;
1092 Int_t expectedNumberOfClusters = 0;
1093 Float_t ratio0 = 0.0;
1094 AliTRDtracklet tracklet;
1096 for (Int_t i = 0; i < 1000; i++) {
1100 for (Int_t iplane = 0; iplane < AliESDtrack::kNPlane; iplane++) {
1102 Int_t row0 = GetGlobalTimeBin(0,iplane,GetTimeBinsPerPlane()-1);
1103 Int_t rowlast = GetGlobalTimeBin(0,iplane,0);
1104 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
1105 if (currentx < t.GetX()) {
1110 // Propagate closer to chamber if neccessary
1112 if (currentx > (fgkMaxStep + t.GetX())) {
1113 if (!PropagateToX(t,currentx-fgkMaxStep,fgkMaxStep)) {
1117 if (!AdjustSector(&t)) {
1120 if (TMath::Abs(t.GetSnp()) > fgkMaxSnp) {
1125 // Get material budget inside of chamber
1133 // Starting global position
1135 // End global position
1136 x = fTrSec[0]->GetLayer(rowlast)->GetX();
1137 if (!t.GetProlongation(x,y,z)) {
1140 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1141 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1143 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1145 radLength = param[1]; // Get mean propagation parameters
1150 sector = t.GetSector();
1151 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
1152 if (tracklet.GetN() < GetTimeBinsPerPlane()/3) {
1157 // Propagate and update track
1159 for (Int_t itime = GetTimeBinsPerPlane()-1; itime >= 0; itime--) {
1161 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
1162 expectedNumberOfClusters++;
1164 if (t.GetX() > 345.0) {
1167 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(ilayer));
1168 AliTRDcluster *cl = 0;
1170 Double_t maxChi2 = fgkMaxChi2;
1175 if (clusters[ilayer] > 0) {
1176 index = clusters[ilayer];
1177 cl = (AliTRDcluster *)GetCluster(index);
1178 //Double_t h01 = GetTiltFactor(cl); // I.B's fix
1179 //maxChi2=t.GetPredictedChi2(cl,h01); //
1184 //if (cl->GetNPads() < 5)
1185 Double_t dxsample = timeBin.GetdX();
1186 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1187 Double_t h01 = GetTiltFactor(cl);
1188 Int_t det = cl->GetDetector();
1189 Int_t plane = fGeom->GetPlane(det);
1190 if (t.GetX() > 345.0) {
1192 t.fChi2Last += maxChi2;
1194 Double_t xcluster = cl->GetX();
1195 t.PropagateTo(xcluster,radLength,rho);
1196 maxChi2 = t.GetPredictedChi2(cl,h01);
1198 if (!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1199 if (!t.Update(cl,maxChi2,index,h01)) {
1204 // Reset material budget if 2 consecutive gold
1206 if (t.fTracklets[plane].GetN() + t.fTracklets[plane-1].GetN() > 20) {
1217 ratio0 = ncl / Float_t(fTimeBinsPerPlane);
1218 Float_t ratio1 = Float_t(t.fN+1) / Float_t(t.fNExpected+1.0);
1219 if ((tracklet.GetChi2() < 18.0) &&
1222 (ratio0+ratio1 > 1.5) &&
1223 (t.GetNCross() == 0) &&
1224 (TMath::Abs(t.GetSnp()) < 0.85) &&
1226 t.MakeBackupTrack(); // Make backup of the track until is gold
1231 return expectedNumberOfClusters;
1235 //_____________________________________________________________________________
1236 Int_t AliTRDtracker::PropagateToX(AliTRDtrack &t, Double_t xToGo, Double_t maxStep)
1239 // Starting from current radial position of track <t> this function
1240 // extrapolates the track up to radial position <xToGo>.
1241 // Returns 1 if track reaches the plane, and 0 otherwise
1244 const Double_t kEpsilon = 0.00001;
1245 //Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1246 Double_t xpos = t.GetX();
1247 Double_t dir = (xpos<xToGo) ? 1.0 : -1.0;
1249 while (((xToGo-xpos)*dir) > kEpsilon) {
1251 Double_t step = dir * TMath::Min(TMath::Abs(xToGo-xpos),maxStep);
1259 // Starting global position
1263 if (!t.GetProlongation(x,y,z)) {
1264 return 0; // No prolongation
1267 xyz1[0] = x * TMath::Cos(t.GetAlpha()) - y * TMath::Sin(t.GetAlpha());
1268 xyz1[1] = +x * TMath::Sin(t.GetAlpha()) + y * TMath::Cos(t.GetAlpha());
1271 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1272 if (!t.PropagateTo(x,param[1],param[0])) {
1284 //_____________________________________________________________________________
1285 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1288 // Fills clusters into TRD tracking_sectors
1289 // Note that the numbering scheme for the TRD tracking_sectors
1290 // differs from that of TRD sectors
1293 if (ReadClusters(fClusters,cTree)) {
1294 AliError("Problem with reading the clusters !");
1297 Int_t ncl = fClusters->GetEntriesFast();
1299 AliInfo(Form("Sorting %d clusters",ncl));
1302 for (Int_t ichamber = 0; ichamber < 5; ichamber++) {
1303 for (Int_t isector = 0; isector < 18; isector++) {
1304 fHoles[ichamber][isector] = kTRUE;
1310 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(ncl);
1311 Int_t detector = c->GetDetector();
1312 Int_t localTimeBin = c->GetLocalTimeBin();
1313 Int_t sector = fGeom->GetSector(detector);
1314 Int_t plane = fGeom->GetPlane(detector);
1315 Int_t trackingSector = CookSectorIndex(sector);
1317 if (c->GetLabel(0) > 0) {
1318 Int_t chamber = fGeom->GetChamber(detector);
1319 fHoles[chamber][trackingSector] = kFALSE;
1322 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1326 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1330 // Apply pos correction
1332 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1340 //_____________________________________________________________________________
1341 void AliTRDtracker::UnloadClusters()
1344 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1350 nentr = fClusters->GetEntriesFast();
1351 for (i = 0; i < nentr; i++) {
1352 delete fClusters->RemoveAt(i);
1356 nentr = fSeeds->GetEntriesFast();
1357 for (i = 0; i < nentr; i++) {
1358 delete fSeeds->RemoveAt(i);
1361 nentr = fTracks->GetEntriesFast();
1362 for (i = 0; i < nentr; i++) {
1363 delete fTracks->RemoveAt(i);
1366 Int_t nsec = AliTRDgeometry::kNsect;
1367 for (i = 0; i < nsec; i++) {
1368 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1369 fTrSec[i]->GetLayer(pl)->Clear();
1375 //_____________________________________________________________________________
1376 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD *esd)
1379 // Creates seeds using clusters between position inner plane and outer plane
1382 const Double_t kMaxTheta = 1.0;
1383 const Double_t kMaxPhi = 2.0;
1385 const Double_t kRoad0y = 6.0; // Road for middle cluster
1386 const Double_t kRoad0z = 8.5; // Road for middle cluster
1388 const Double_t kRoad1y = 2.0; // Road in y for seeded cluster
1389 const Double_t kRoad1z = 20.0; // Road in z for seeded cluster
1391 const Double_t kRoad2y = 3.0; // Road in y for extrapolated cluster
1392 const Double_t kRoad2z = 20.0; // Road in z for extrapolated cluster
1393 const Int_t kMaxSeed = 3000;
1395 Int_t maxSec = AliTRDgeometry::kNsect;
1397 // Linear fitters in planes
1398 TLinearFitter fitterTC(2,"hyp2"); // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1399 TLinearFitter fitterT2(4,"hyp4"); // Fitting with tilting pads - kz not fixed
1400 fitterTC.StoreData(kTRUE);
1401 fitterT2.StoreData(kTRUE);
1402 AliRieman rieman(1000); // Rieman fitter
1403 AliRieman rieman2(1000); // Rieman fitter
1405 // Find the maximal and minimal layer for the planes
1407 AliTRDpropagationLayer *reflayers[6];
1408 for (Int_t i = 0; i < 6; i++) {
1409 layers[i][0] = 10000;
1412 for (Int_t ns = 0; ns < maxSec; ns++) {
1413 for (Int_t ilayer = 0; ilayer < fTrSec[ns]->GetNumberOfLayers(); ilayer++) {
1414 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(ilayer));
1418 Int_t det = layer[0]->GetDetector();
1419 Int_t plane = fGeom->GetPlane(det);
1420 if (ilayer < layers[plane][0]) {
1421 layers[plane][0] = ilayer;
1423 if (ilayer > layers[plane][1]) {
1424 layers[plane][1] = ilayer;
1429 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1430 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1431 Double_t hL[6]; // Tilting angle
1432 Double_t xcl[6]; // X - position of reference cluster
1433 Double_t ycl[6]; // Y - position of reference cluster
1434 Double_t zcl[6]; // Z - position of reference cluster
1436 AliTRDcluster *cl[6] = { 0, 0, 0, 0, 0, 0 }; // Seeding clusters
1437 Float_t padlength[6] = { 10.0, 10.0, 10.0, 10.0, 10.0, 10.0 }; // Current pad-length
1439 Double_t chi2R = 0.0;
1440 Double_t chi2Z = 0.0;
1441 Double_t chi2RF = 0.0;
1442 Double_t chi2ZF = 0.0;
1444 Int_t nclusters; // Total number of clusters
1445 for (Int_t i = 0; i < 6; i++) {
1453 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1454 AliTRDseed *seed[kMaxSeed];
1455 for (Int_t iseed = 0; iseed < kMaxSeed; iseed++) {
1456 seed[iseed]= &pseed[iseed*6];
1458 AliTRDseed *cseed = seed[0];
1460 Double_t seedquality[kMaxSeed];
1461 Double_t seedquality2[kMaxSeed];
1462 Double_t seedparams[kMaxSeed][7];
1463 Int_t seedlayer[kMaxSeed];
1464 Int_t registered = 0;
1465 Int_t sort[kMaxSeed];
1470 for (Int_t ns = 0; ns < maxSec; ns++) { // Loop over sectors
1471 //for (Int_t ns = 0; ns < 5; ns++) { // Loop over sectors
1473 registered = 0; // Reset registerd seed counter
1474 cseed = seed[registered];
1477 for (Int_t sLayer = 2; sLayer >= 0; sLayer--) {
1478 //for (Int_t dseed = 5; dseed < 15; dseed += 3) {
1481 Int_t dseed = 5 + Int_t(iter) * 3;
1483 // Initialize seeding layers
1484 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
1485 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1486 xcl[ilayer] = reflayers[ilayer]->GetX();
1489 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2]) * 0.5;
1490 AliTRDpropagationLayer &layer0 = *reflayers[sLayer+0];
1491 AliTRDpropagationLayer &layer1 = *reflayers[sLayer+1];
1492 AliTRDpropagationLayer &layer2 = *reflayers[sLayer+2];
1493 AliTRDpropagationLayer &layer3 = *reflayers[sLayer+3];
1495 Int_t maxn3 = layer3;
1496 for (Int_t icl3 = 0; icl3 < maxn3; icl3++) {
1498 AliTRDcluster *cl3 = layer3[icl3];
1502 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2() * 12.0);
1503 ycl[sLayer+3] = cl3->GetY();
1504 zcl[sLayer+3] = cl3->GetZ();
1505 Float_t yymin0 = ycl[sLayer+3] - 1.0 - kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1506 Float_t yymax0 = ycl[sLayer+3] + 1.0 + kMaxPhi * (xcl[sLayer+3]-xcl[sLayer+0]);
1507 Int_t maxn0 = layer0;
1509 for (Int_t icl0 = layer0.Find(yymin0); icl0 < maxn0; icl0++) {
1511 AliTRDcluster *cl0 = layer0[icl0];
1515 if (cl3->IsUsed() && cl0->IsUsed()) {
1518 ycl[sLayer+0] = cl0->GetY();
1519 zcl[sLayer+0] = cl0->GetZ();
1520 if (ycl[sLayer+0] > yymax0) {
1523 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1524 if (TMath::Abs(tanphi) > kMaxPhi) {
1527 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0]) / (xcl[sLayer+3]-xcl[sLayer+0]);
1528 if (TMath::Abs(tantheta) > kMaxTheta) {
1531 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2() * 12.0);
1533 // Expected position in 1 layer
1534 Double_t y1exp = ycl[sLayer+0] + (tanphi) * (xcl[sLayer+1]-xcl[sLayer+0]);
1535 Double_t z1exp = zcl[sLayer+0] + (tantheta) * (xcl[sLayer+1]-xcl[sLayer+0]);
1536 Float_t yymin1 = y1exp - kRoad0y - tanphi;
1537 Float_t yymax1 = y1exp + kRoad0y + tanphi;
1538 Int_t maxn1 = layer1;
1540 for (Int_t icl1 = layer1.Find(yymin1); icl1 < maxn1; icl1++) {
1542 AliTRDcluster *cl1 = layer1[icl1];
1547 if (cl3->IsUsed()) nusedCl++;
1548 if (cl0->IsUsed()) nusedCl++;
1549 if (cl1->IsUsed()) nusedCl++;
1553 ycl[sLayer+1] = cl1->GetY();
1554 zcl[sLayer+1] = cl1->GetZ();
1555 if (ycl[sLayer+1] > yymax1) {
1558 if (TMath::Abs(ycl[sLayer+1]-y1exp) > kRoad0y+tanphi) {
1561 if (TMath::Abs(zcl[sLayer+1]-z1exp) > kRoad0z) {
1564 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2() * 12.0);
1566 Double_t y2exp = ycl[sLayer+0]+(tanphi) * (xcl[sLayer+2]-xcl[sLayer+0]) + (ycl[sLayer+1]-y1exp);
1567 Double_t z2exp = zcl[sLayer+0]+(tantheta) * (xcl[sLayer+2]-xcl[sLayer+0]);
1568 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y,kRoad1z);
1572 AliTRDcluster *cl2 = (AliTRDcluster *) GetCluster(index2);
1573 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2() * 12.0);
1574 ycl[sLayer+2] = cl2->GetY();
1575 zcl[sLayer+2] = cl2->GetZ();
1576 if (TMath::Abs(cl2->GetZ()-z2exp) > kRoad0z) {
1581 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1582 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1583 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1584 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1588 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1589 cseed[iLayer].Reset();
1594 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1595 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1596 chi2Z += (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer])
1597 * (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer]);
1598 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1599 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1600 chi2R += (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer])
1601 * (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer]);
1602 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1604 if (TMath::Sqrt(chi2R) > 1.0/iter) {
1607 if (TMath::Sqrt(chi2Z) > 7.0/iter) {
1611 Float_t minmax[2] = { -100.0, 100.0 };
1612 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1613 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer] * 0.5
1614 + 1.0 - cseed[sLayer+iLayer].fZref[0];
1615 if (max < minmax[1]) {
1618 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer] * 0.5
1619 - 1.0 - cseed[sLayer+iLayer].fZref[0];
1620 if (min > minmax[0]) {
1625 Bool_t isFake = kFALSE;
1626 if (cl0->GetLabel(0) != cl3->GetLabel(0)) {
1629 if (cl1->GetLabel(0) != cl3->GetLabel(0)) {
1632 if (cl2->GetLabel(0) != cl3->GetLabel(0)) {
1636 if (AliTRDReconstructor::StreamLevel() > 0) {
1637 if ((!isFake) || ((icl3%10) == 0)) { // Debugging print
1638 TTreeSRedirector &cstream = *fDebugStreamer;
1640 << "isFake=" << isFake
1646 << "X0=" << xcl[sLayer+0]
1647 << "X1=" << xcl[sLayer+1]
1648 << "X2=" << xcl[sLayer+2]
1649 << "X3=" << xcl[sLayer+3]
1650 << "Y2exp=" << y2exp
1651 << "Z2exp=" << z2exp
1652 << "Chi2R=" << chi2R
1653 << "Chi2Z=" << chi2Z
1654 << "Seed0.=" << &cseed[sLayer+0]
1655 << "Seed1.=" << &cseed[sLayer+1]
1656 << "Seed2.=" << &cseed[sLayer+2]
1657 << "Seed3.=" << &cseed[sLayer+3]
1658 << "Zmin=" << minmax[0]
1659 << "Zmax=" << minmax[1]
1664 ////////////////////////////////////////////////////////////////////////////////////
1668 ////////////////////////////////////////////////////////////////////////////////////
1674 Bool_t isOK = kTRUE;
1676 for (Int_t jLayer = 0; jLayer < 4; jLayer++) {
1678 cseed[sLayer+jLayer].fTilt = hL[sLayer+jLayer];
1679 cseed[sLayer+jLayer].fPadLength = padlength[sLayer+jLayer];
1680 cseed[sLayer+jLayer].fX0 = xcl[sLayer+jLayer];
1682 for (Int_t iter = 0; iter < 2; iter++) {
1685 // In iteration 0 we try only one pad-row
1686 // If quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1688 AliTRDseed tseed = cseed[sLayer+jLayer];
1689 Float_t roadz = padlength[sLayer+jLayer] * 0.5;
1691 roadz = padlength[sLayer+jLayer];
1694 Float_t quality = 10000.0;
1696 for (Int_t iTime = 2; iTime < 20; iTime++) {
1698 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1699 Double_t dxlayer = layer.GetX() - xcl[sLayer+jLayer];
1700 Double_t zexp = cl[sLayer+jLayer]->GetZ();
1703 // Try 2 pad-rows in second iteration
1704 zexp = tseed.fZref[0] + tseed.fZref[1]*dxlayer;
1705 if (zexp > cl[sLayer+jLayer]->GetZ()) {
1706 zexp = cl[sLayer+jLayer]->GetZ() + padlength[sLayer+jLayer]*0.5;
1708 if (zexp < cl[sLayer+jLayer]->GetZ()) {
1709 zexp = cl[sLayer+jLayer]->GetZ() - padlength[sLayer+jLayer]*0.5;
1713 Double_t yexp = tseed.fYref[0] + tseed.fYref[1]*dxlayer;
1714 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
1718 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1720 tseed.fIndexes[iTime] = index;
1721 tseed.fClusters[iTime] = cl; // Register cluster
1722 tseed.fX[iTime] = dxlayer; // Register cluster
1723 tseed.fY[iTime] = cl->GetY(); // Register cluster
1724 tseed.fZ[iTime] = cl->GetZ(); // Register cluster
1730 // Count the number of clusters and distortions into quality
1731 Float_t dangle = tseed.fYfit[1] - tseed.fYref[1];
1732 Float_t tquality = (18.0 - tseed.fN2) / 2.0 + TMath::Abs(dangle) / 0.1
1733 + TMath::Abs(tseed.fYfit[0] - tseed.fYref[0]) / 0.2
1734 + 2.0 * TMath::Abs(tseed.fMeanz-tseed.fZref[0]) / padlength[jLayer];
1735 if ((iter == 0) && tseed.IsOK()) {
1736 cseed[sLayer+jLayer] = tseed;
1742 if (tseed.IsOK() && (tquality < quality)) {
1743 cseed[sLayer+jLayer] = tseed;
1748 if (!cseed[sLayer+jLayer].IsOK()) {
1753 cseed[sLayer+jLayer].CookLabels();
1754 cseed[sLayer+jLayer].UpdateUsed();
1755 nusedCl += cseed[sLayer+jLayer].fNUsed;
1767 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1768 if (cseed[sLayer+iLayer].IsOK()) {
1769 nclusters += cseed[sLayer+iLayer].fN2;
1775 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1776 rieman.AddPoint(xcl[sLayer+iLayer]
1777 ,cseed[sLayer+iLayer].fYfitR[0]
1778 ,cseed[sLayer+iLayer].fZProb
1787 for (Int_t iLayer = 0; iLayer < 4; iLayer++) {
1788 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1789 chi2R += (cseed[sLayer+iLayer].fYref[0] - cseed[sLayer+iLayer].fYfitR[0])
1790 * (cseed[sLayer+iLayer].fYref[0] - cseed[sLayer+iLayer].fYfitR[0]);
1791 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1792 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1793 chi2Z += (cseed[sLayer+iLayer].fZref[0] - cseed[sLayer+iLayer].fMeanz)
1794 * (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz);
1795 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1797 Double_t curv = rieman.GetC();
1802 Double_t sumda = TMath::Abs(cseed[sLayer+0].fYfitR[1] - cseed[sLayer+0].fYref[1])
1803 + TMath::Abs(cseed[sLayer+1].fYfitR[1] - cseed[sLayer+1].fYref[1])
1804 + TMath::Abs(cseed[sLayer+2].fYfitR[1] - cseed[sLayer+2].fYref[1])
1805 + TMath::Abs(cseed[sLayer+3].fYfitR[1]- cseed[sLayer+3].fYref[1]);
1806 Double_t likea = TMath::Exp(-sumda*10.6);
1807 Double_t likechi2 = 0.0000000001;
1809 likechi2 += TMath::Exp(-TMath::Sqrt(chi2R) * 7.73);
1811 Double_t likechi2z = TMath::Exp(-chi2Z * 0.088) / TMath::Exp(-chi2Z * 0.019);
1812 Double_t likeN = TMath::Exp(-(72 - nclusters) * 0.19);
1813 Double_t like = likea * likechi2 * likechi2z * likeN;
1814 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fYref[1] - 130.0*curv) * 1.9);
1815 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fZref[1]
1816 - cseed[sLayer+0].fZref[0] / xcl[sLayer+0]) * 5.9);
1817 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1819 seedquality[registered] = like;
1820 seedlayer[registered] = sLayer;
1821 if (TMath::Log(0.000000000000001 + like) < -15) {
1824 AliTRDseed seedb[6];
1825 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
1826 seedb[iLayer] = cseed[iLayer];
1829 ////////////////////////////////////////////////////////////////////////////////////
1831 // Full track fit part
1833 ////////////////////////////////////////////////////////////////////////////////////
1840 // Add new layers - avoid long extrapolation
1842 Int_t tLayer[2] = { 0, 0 };
1856 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1857 Int_t jLayer = tLayer[iLayer]; // Set tracking layer
1858 cseed[jLayer].Reset();
1859 cseed[jLayer].fTilt = hL[jLayer];
1860 cseed[jLayer].fPadLength = padlength[jLayer];
1861 cseed[jLayer].fX0 = xcl[jLayer];
1862 // Get pad length and rough cluster
1863 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].fYref[0]
1864 ,cseed[jLayer].fZref[0]
1867 if (indexdummy <= 0) {
1870 AliTRDcluster *cldummy = (AliTRDcluster *) GetCluster(indexdummy);
1871 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2() * 12.0);
1873 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
1875 for (Int_t iLayer = 0; iLayer < 2; iLayer++) {
1877 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1878 if ((jLayer == 0) && !(cseed[1].IsOK())) {
1879 continue; // break not allowed
1881 if ((jLayer == 5) && !(cseed[4].IsOK())) {
1882 continue; // break not allowed
1884 Float_t zexp = cseed[jLayer].fZref[0];
1885 Double_t zroad = padlength[jLayer] * 0.5 + 1.0;
1887 for (Int_t iter = 0; iter < 2; iter++) {
1889 AliTRDseed tseed = cseed[jLayer];
1890 Float_t quality = 10000.0;
1892 for (Int_t iTime = 2; iTime < 20; iTime++) {
1893 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
1894 Double_t dxlayer = layer.GetX()-xcl[jLayer];
1895 Double_t yexp = tseed.fYref[0] + tseed.fYref[1]*dxlayer;
1896 Float_t yroad = kRoad1y;
1897 Int_t index = layer.FindNearestCluster(yexp,zexp,yroad,zroad);
1901 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
1902 tseed.fIndexes[iTime] = index;
1903 tseed.fClusters[iTime] = cl; // Register cluster
1904 tseed.fX[iTime] = dxlayer; // Register cluster
1905 tseed.fY[iTime] = cl->GetY(); // Register cluster
1906 tseed.fZ[iTime] = cl->GetZ(); // Register cluster
1911 Float_t dangle = tseed.fYfit[1] - tseed.fYref[1];
1912 Float_t tquality = (18.0 - tseed.fN2)/2.0 + TMath::Abs(dangle) / 0.1
1913 + TMath::Abs(tseed.fYfit[0] - tseed.fYref[0]) / 0.2
1914 + 2.0 * TMath::Abs(tseed.fMeanz-tseed.fZref[0]) / padlength[jLayer];
1915 if (tquality < quality) {
1916 cseed[jLayer] = tseed;
1925 if ( cseed[jLayer].IsOK()) {
1926 cseed[jLayer].CookLabels();
1927 cseed[jLayer].UpdateUsed();
1928 nusedf += cseed[jLayer].fNUsed;
1929 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
1935 AliTRDseed bseed[6];
1936 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1937 bseed[jLayer] = cseed[jLayer];
1939 Float_t lastquality = 10000.0;
1940 Float_t lastchi2 = 10000.0;
1941 Float_t chi2 = 1000.0;
1943 for (Int_t iter = 0; iter < 4; iter++) {
1945 // Sort tracklets according "quality", try to "improve" 4 worst
1946 Float_t sumquality = 0.0;
1947 Float_t squality[6];
1948 Int_t sortindexes[6];
1950 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1951 if (bseed[jLayer].IsOK()) {
1952 AliTRDseed &tseed = bseed[jLayer];
1953 Double_t zcor = tseed.fTilt * (tseed.fZProb - tseed.fZref[0]);
1954 Float_t dangle = tseed.fYfit[1] - tseed.fYref[1];
1955 Float_t tquality = (18.0 - tseed.fN2) / 2.0 + TMath::Abs(dangle) / 0.1
1956 + TMath::Abs(tseed.fYfit[0] - (tseed.fYref[0] - zcor)) / 0.2
1957 + 2.0 * TMath::Abs(tseed.fMeanz - tseed.fZref[0]) / padlength[jLayer];
1958 squality[jLayer] = tquality;
1961 squality[jLayer] = -1.0;
1963 sumquality +=squality[jLayer];
1966 if ((sumquality >= lastquality) ||
1967 (chi2 > lastchi2)) {
1970 lastquality = sumquality;
1973 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
1974 cseed[jLayer] = bseed[jLayer];
1977 TMath::Sort(6,squality,sortindexes,kFALSE);
1979 for (Int_t jLayer = 5; jLayer > 1; jLayer--) {
1981 Int_t bLayer = sortindexes[jLayer];
1982 AliTRDseed tseed = bseed[bLayer];
1984 for (Int_t iTime = 2; iTime < 20; iTime++) {
1986 AliTRDpropagationLayer &layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
1987 Double_t dxlayer = layer.GetX() - xcl[bLayer];
1988 Double_t zexp = tseed.fZref[0];
1989 Double_t zcor = tseed.fTilt * (tseed.fZProb - tseed.fZref[0]);
1990 Float_t roadz = padlength[bLayer] + 1;
1991 if (TMath::Abs(tseed.fZProb-zexp) > padlength[bLayer]*0.5) {
1992 roadz = padlength[bLayer] * 0.5;
1994 if (tseed.fZfit[1]*tseed.fZref[1] < 0) {
1995 roadz = padlength[bLayer] * 0.5;
1997 if (TMath::Abs(tseed.fZProb-zexp) < 0.1*padlength[bLayer]) {
1998 zexp = tseed.fZProb;
1999 roadz = padlength[bLayer] * 0.5;
2002 Double_t yexp = tseed.fYref[0] + tseed.fYref[1]*dxlayer-zcor;
2003 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y,roadz);
2007 AliTRDcluster *cl = (AliTRDcluster *) GetCluster(index);
2009 tseed.fIndexes[iTime] = index;
2010 tseed.fClusters[iTime] = cl; // Register cluster
2011 tseed.fX[iTime] = dxlayer; // Register cluster
2012 tseed.fY[iTime] = cl->GetY(); // Register cluster
2013 tseed.fZ[iTime] = cl->GetZ(); // Register cluster
2019 Float_t dangle = tseed.fYfit[1] - tseed.fYref[1];
2020 Double_t zcor = tseed.fTilt * (tseed.fZProb - tseed.fZref[0]);
2021 Float_t tquality = (18.0 - tseed.fN2) / 2.0
2022 + TMath::Abs(dangle) / 0.1
2023 + TMath::Abs(tseed.fYfit[0] - (tseed.fYref[0] - zcor)) / 0.2
2024 + 2.0 * TMath::Abs(tseed.fMeanz - tseed.fZref[0]) / padlength[jLayer];
2025 if (tquality<squality[bLayer]) {
2026 bseed[bLayer] = tseed;
2032 chi2 = AliTRDseed::FitRiemanTilt(bseed,kTRUE);
2039 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2040 if (TMath::Abs(cseed[iLayer].fYref[0] / cseed[iLayer].fX0) < 0.15) {
2043 if (cseed[iLayer].IsOK()) {
2044 nclusters += cseed[iLayer].fN2;
2052 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2053 if (cseed[iLayer].IsOK()) {
2054 rieman.AddPoint(xcl[iLayer]
2055 ,cseed[iLayer].fYfitR[0]
2056 ,cseed[iLayer].fZProb
2065 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2066 if (cseed[iLayer].IsOK()) {
2067 cseed[iLayer].fYref[0] = rieman.GetYat(xcl[iLayer]);
2068 chi2RF += (cseed[iLayer].fYref[0] - cseed[iLayer].fYfitR[0])
2069 * (cseed[iLayer].fYref[0] - cseed[iLayer].fYfitR[0]);
2070 cseed[iLayer].fYref[1] = rieman.GetDYat(xcl[iLayer]);
2071 cseed[iLayer].fZref[0] = rieman.GetZat(xcl[iLayer]);
2072 chi2ZF += (cseed[iLayer].fZref[0] - cseed[iLayer].fMeanz)
2073 * (cseed[iLayer].fZref[0] - cseed[iLayer].fMeanz);
2074 cseed[iLayer].fZref[1] = rieman.GetDZat(xcl[iLayer]);
2077 chi2RF /= TMath::Max((nlayers - 3.0),1.0);
2078 chi2ZF /= TMath::Max((nlayers - 3.0),1.0);
2079 curv = rieman.GetC();
2081 Double_t xref2 = (xcl[2] + xcl[3]) * 0.5; // Middle of the chamber
2082 Double_t dzmf = rieman.GetDZat(xref2);
2083 Double_t zmf = rieman.GetZat(xref2);
2089 fitterTC.ClearPoints();
2090 fitterT2.ClearPoints();
2093 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2095 if (!cseed[iLayer].IsOK()) {
2099 for (Int_t itime = 0; itime < 25; itime++) {
2101 if (!cseed[iLayer].fUsable[itime]) {
2104 // X relative to the middle chamber
2105 Double_t x = cseed[iLayer].fX[itime] + cseed[iLayer].fX0 - xref2;
2106 Double_t y = cseed[iLayer].fY[itime];
2107 Double_t z = cseed[iLayer].fZ[itime];
2108 // ExB correction to the correction
2112 Double_t x2 = cseed[iLayer].fX[itime] + cseed[iLayer].fX0;
2113 Double_t t = 1.0 / (x2*x2 + y*y);
2115 uvt[0] = 2.0 * x2 * uvt[1]; // u
2116 uvt[2] = 2.0 * hL[iLayer] * uvt[1];
2117 uvt[3] = 2.0 * hL[iLayer] * x * uvt[1];
2118 uvt[4] = 2.0 * (y + hL[iLayer]*z) * uvt[1];
2119 Double_t error = 2.0 * 0.2 * uvt[1];
2120 fitterT2.AddPoint(uvt,uvt[4],error);
2123 // Constrained rieman
2125 z = cseed[iLayer].fZ[itime];
2126 uvt[0] = 2.0 * x2 * t; // u
2127 uvt[1] = 2.0 * hL[iLayer] * x2 * uvt[1];
2128 uvt[2] = 2.0 * (y + hL[iLayer] * (z - GetZ())) * t;
2129 fitterTC.AddPoint(uvt,uvt[2],error);
2130 rieman2.AddPoint(x2,y,z,1,10);
2140 Double_t rpolz0 = fitterT2.GetParameter(3);
2141 Double_t rpolz1 = fitterT2.GetParameter(4);
2144 // Linear fitter - not possible to make boundaries
2145 // Do not accept non possible z and dzdx combinations
2147 Bool_t acceptablez = kTRUE;
2148 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2149 if (cseed[iLayer].IsOK()) {
2150 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2151 if (TMath::Abs(cseed[iLayer].fZProb - zT2) > padlength[iLayer] * 0.5 + 1.0) {
2152 acceptablez = kFALSE;
2157 fitterT2.FixParameter(3,zmf);
2158 fitterT2.FixParameter(4,dzmf);
2160 fitterT2.ReleaseParameter(3);
2161 fitterT2.ReleaseParameter(4);
2162 rpolz0 = fitterT2.GetParameter(3);
2163 rpolz1 = fitterT2.GetParameter(4);
2166 Double_t chi2TR = fitterT2.GetChisquare() / Float_t(npointsT);
2167 Double_t chi2TC = fitterTC.GetChisquare() / Float_t(npointsT);
2168 Double_t polz1c = fitterTC.GetParameter(2);
2169 Double_t polz0c = polz1c * xref2;
2170 Double_t aC = fitterTC.GetParameter(0);
2171 Double_t bC = fitterTC.GetParameter(1);
2172 Double_t cC = aC / TMath::Sqrt(bC * bC + 1.0); // Curvature
2173 Double_t aR = fitterT2.GetParameter(0);
2174 Double_t bR = fitterT2.GetParameter(1);
2175 Double_t dR = fitterT2.GetParameter(2);
2176 Double_t cR = 1.0 + bR*bR - dR*aR;
2179 dca = -dR / (TMath::Sqrt(1.0 + bR*bR - dR*aR) + TMath::Sqrt(1.0 + bR*bR));
2180 cR = aR / TMath::Sqrt(cR);
2183 Double_t chi2ZT2 = 0.0;
2184 Double_t chi2ZTC = 0.0;
2185 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2186 if (cseed[iLayer].IsOK()) {
2187 Double_t zT2 = rpolz0 + rpolz1 * (xcl[iLayer] - xref2);
2188 Double_t zTC = polz0c + polz1c * (xcl[iLayer] - xref2);
2189 chi2ZT2 += TMath::Abs(cseed[iLayer].fMeanz - zT2);
2190 chi2ZTC += TMath::Abs(cseed[iLayer].fMeanz - zTC);
2193 chi2ZT2 /= TMath::Max((nlayers - 3.0),1.0);
2194 chi2ZTC /= TMath::Max((nlayers - 3.0),1.0);
2196 AliTRDseed::FitRiemanTilt(cseed,kTRUE);
2197 Float_t sumdaf = 0.0;
2198 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2199 if (cseed[iLayer].IsOK()) {
2200 sumdaf += TMath::Abs((cseed[iLayer].fYfit[1] - cseed[iLayer].fYref[1])
2201 / cseed[iLayer].fSigmaY2);
2204 sumdaf /= Float_t (nlayers - 2.0);
2207 // Likelihoods for full track
2209 Double_t likezf = TMath::Exp(-chi2ZF * 0.14);
2210 Double_t likechi2C = TMath::Exp(-chi2TC * 0.677);
2211 Double_t likechi2TR = TMath::Exp(-chi2TR * 0.78);
2212 Double_t likeaf = TMath::Exp(-sumdaf * 3.23);
2213 seedquality2[registered] = likezf * likechi2TR * likeaf;
2215 // Still needed ????
2216 // Bool_t isGold = kFALSE;
2218 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2219 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2220 // if (isGold &&nusedf<10){
2221 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2222 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2223 // seed[index][jLayer].UseClusters(); //sign gold
2228 if (!cseed[0].IsOK()) {
2230 if (!cseed[1].IsOK()) {
2234 seedparams[registered][0] = cseed[index0].fX0;
2235 seedparams[registered][1] = cseed[index0].fYref[0];
2236 seedparams[registered][2] = cseed[index0].fZref[0];
2237 seedparams[registered][5] = cR;
2238 seedparams[registered][3] = cseed[index0].fX0 * cR - TMath::Sin(TMath::ATan(cseed[0].fYref[1]));
2239 seedparams[registered][4] = cseed[index0].fZref[1]
2240 / TMath::Sqrt(1.0 + cseed[index0].fYref[1] * cseed[index0].fYref[1]);
2241 seedparams[registered][6] = ns;
2246 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2247 if (!cseed[iLayer].IsOK()) {
2250 if (cseed[iLayer].fLabels[0] >= 0) {
2251 labels[nlab] = cseed[iLayer].fLabels[0];
2254 if (cseed[iLayer].fLabels[1] >= 0) {
2255 labels[nlab] = cseed[iLayer].fLabels[1];
2259 Freq(nlab,labels,outlab,kFALSE);
2260 Int_t label = outlab[0];
2261 Int_t frequency = outlab[1];
2262 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2263 cseed[iLayer].fFreq = frequency;
2264 cseed[iLayer].fC = cR;
2265 cseed[iLayer].fCC = cC;
2266 cseed[iLayer].fChi2 = chi2TR;
2267 cseed[iLayer].fChi2Z = chi2ZF;
2271 if (1 || (!isFake)) {
2272 Float_t zvertex = GetZ();
2273 TTreeSRedirector &cstream = *fDebugStreamer;
2274 if (AliTRDReconstructor::StreamLevel() > 0) {
2276 << "isFake=" << isFake
2277 << "Vertex=" << zvertex
2278 << "Rieman2.=" << &rieman2
2279 << "Rieman.=" << &rieman
2287 << "Chi2R=" << chi2R
2288 << "Chi2Z=" << chi2Z
2289 << "Chi2RF=" << chi2RF // Chi2 of trackletes on full track
2290 << "Chi2ZF=" << chi2ZF // Chi2 z on tracklets on full track
2291 << "Chi2ZT2=" << chi2ZT2 // Chi2 z on tracklets on full track - rieman tilt
2292 << "Chi2ZTC=" << chi2ZTC // Chi2 z on tracklets on full track - rieman tilt const
2293 << "Chi2TR=" << chi2TR // Chi2 without vertex constrain
2294 << "Chi2TC=" << chi2TC // Chi2 with vertex constrain
2295 << "C=" << curv // Non constrained - no tilt correction
2296 << "DR=" << dR // DR parameter - tilt correction
2297 << "DCA=" << dca // DCA - tilt correction
2298 << "CR=" << cR // Non constrained curvature - tilt correction
2299 << "CC=" << cC // Constrained curvature
2300 << "Polz0=" << polz0c
2301 << "Polz1=" << polz1c
2302 << "RPolz0=" << rpolz0
2303 << "RPolz1=" << rpolz1
2304 << "Ncl=" << nclusters
2305 << "Nlayers=" << nlayers
2306 << "NUsedS=" << nusedCl
2307 << "NUsed=" << nusedf
2308 << "Findable=" << findable
2310 << "LikePrim=" << likePrim
2311 << "Likechi2C=" << likechi2C
2312 << "Likechi2TR=" << likechi2TR
2313 << "Likezf=" << likezf
2314 << "LikeF=" << seedquality2[registered]
2315 << "S0.=" << &cseed[0]
2316 << "S1.=" << &cseed[1]
2317 << "S2.=" << &cseed[2]
2318 << "S3.=" << &cseed[3]
2319 << "S4.=" << &cseed[4]
2320 << "S5.=" << &cseed[5]
2321 << "SB0.=" << &seedb[0]
2322 << "SB1.=" << &seedb[1]
2323 << "SB2.=" << &seedb[2]
2324 << "SB3.=" << &seedb[3]
2325 << "SB4.=" << &seedb[4]
2326 << "SB5.=" << &seedb[5]
2327 << "Label=" << label
2328 << "Freq=" << frequency
2329 << "sLayer=" << sLayer
2334 if (registered<kMaxSeed - 1) {
2336 cseed = seed[registered];
2339 } // End of loop over layer 1
2341 } // End of loop over layer 0
2343 } // End of loop over layer 3
2345 } // End of loop over seeding time bins
2351 TMath::Sort(registered,seedquality2,sort,kTRUE);
2352 Bool_t signedseed[kMaxSeed];
2353 for (Int_t i = 0; i < registered; i++) {
2354 signedseed[i] = kFALSE;
2357 for (Int_t iter = 0; iter < 5; iter++) {
2359 for (Int_t iseed = 0; iseed < registered; iseed++) {
2361 Int_t index = sort[iseed];
2362 if (signedseed[index]) {
2365 Int_t labelsall[1000];
2366 Int_t nlabelsall = 0;
2367 Int_t naccepted = 0;;
2368 Int_t sLayer = seedlayer[index];
2374 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2376 if (TMath::Abs(seed[index][jLayer].fYref[0] / xcl[jLayer]) < 0.15) {
2379 if (seed[index][jLayer].IsOK()) {
2380 seed[index][jLayer].UpdateUsed();
2381 ncl +=seed[index][jLayer].fN2;
2382 nused +=seed[index][jLayer].fNUsed;
2385 for (Int_t itime = 0; itime < 25; itime++) {
2386 if (seed[index][jLayer].fUsable[itime]) {
2388 for (Int_t ilab = 0; ilab < 3; ilab++) {
2389 Int_t tindex = seed[index][jLayer].fClusters[itime]->GetLabel(ilab);
2391 labelsall[nlabelsall] = tindex;
2409 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2415 if (nlayers < findable) {
2418 if (TMath::Log(0.000000001+seedquality2[index]) < -4.0) {
2424 if ((nlayers == findable) ||
2428 if (TMath::Log(0.000000001+seedquality2[index]) < -6.0) {
2434 if (TMath::Log(0.000000001+seedquality2[index]) < -5.0) {
2440 if (TMath::Log(0.000000001+seedquality2[index]) - nused/(nlayers-3.0) < -15.0) {
2445 signedseed[index] = kTRUE;
2450 for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
2451 if (seed[index][iLayer].IsOK()) {
2452 if (seed[index][iLayer].fLabels[0] >= 0) {
2453 labels[nlab] = seed[index][iLayer].fLabels[0];
2456 if (seed[index][iLayer].fLabels[1] >= 0) {
2457 labels[nlab] = seed[index][iLayer].fLabels[1];
2462 Freq(nlab,labels,outlab,kFALSE);
2463 Int_t label = outlab[0];
2464 Int_t frequency = outlab[1];
2465 Freq(nlabelsall,labelsall,outlab,kFALSE);
2466 Int_t label1 = outlab[0];
2467 Int_t label2 = outlab[2];
2468 Float_t fakeratio = (naccepted - outlab[1]) / Float_t(naccepted);
2469 Float_t ratio = Float_t(nused) / Float_t(ncl);
2471 for (Int_t jLayer = 0; jLayer < 6; jLayer++) {
2472 if ((seed[index][jLayer].IsOK()) &&
2473 (TMath::Abs(seed[index][jLayer].fYfit[1] - seed[index][jLayer].fYfit[1]) < 0.2)) {
2474 seed[index][jLayer].UseClusters(); // Sign gold
2479 Int_t eventNr = esd->GetEventNumber();
2480 TTreeSRedirector &cstream = *fDebugStreamer;
2485 AliTRDtrack *track = RegisterSeed(seed[index],seedparams[index]);
2491 AliESDtrack esdtrack;
2492 esdtrack.UpdateTrackParams(track,AliESDtrack::kTRDout);
2493 esdtrack.SetLabel(label);
2494 esd->AddTrack(&esdtrack);
2495 TTreeSRedirector &cstream = *fDebugStreamer;
2496 if (AliTRDReconstructor::StreamLevel() > 0) {
2498 << "EventNr=" << eventNr
2499 << "ESD.=" << &esdtrack
2501 << "trdback.=" << track
2506 if (AliTRDReconstructor::StreamLevel() > 0) {
2509 << "Track.=" << track
2510 << "Like=" << seedquality[index]
2511 << "LikeF=" << seedquality2[index]
2512 << "S0.=" << &seed[index][0]
2513 << "S1.=" << &seed[index][1]
2514 << "S2.=" << &seed[index][2]
2515 << "S3.=" << &seed[index][3]
2516 << "S4.=" << &seed[index][4]
2517 << "S5.=" << &seed[index][5]
2518 << "Label=" << label
2519 << "Label1=" << label1
2520 << "Label2=" << label2
2521 << "FakeRatio=" << fakeratio
2522 << "Freq=" << frequency
2524 << "Nlayers=" << nlayers
2525 << "Findable=" << findable
2526 << "NUsed=" << nused
2527 << "sLayer=" << sLayer
2528 << "EventNr=" << eventNr
2536 } // End of loop over sectors
2542 //_____________________________________________________________________________
2543 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *clusterTree) const
2546 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2547 // from the file. The names of the cluster tree and branches
2548 // should match the ones used in AliTRDclusterizer::WriteClusters()
2551 Int_t nsize = Int_t(clusterTree->GetTotBytes() / (sizeof(AliTRDcluster)));
2552 TObjArray *clusterArray = new TObjArray(nsize+1000);
2554 TBranch *branch = clusterTree->GetBranch("TRDcluster");
2556 AliError("Can't get the branch !");
2559 branch->SetAddress(&clusterArray);
2561 // Loop through all entries in the tree
2562 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2564 AliTRDcluster *c = 0;
2565 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2568 nbytes += clusterTree->GetEvent(iEntry);
2570 // Get the number of points in the detector
2571 Int_t nCluster = clusterArray->GetEntriesFast();
2573 // Loop through all TRD digits
2574 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2575 c = (AliTRDcluster *) clusterArray->UncheckedAt(iCluster);
2576 AliTRDcluster *co = c;
2578 clusterArray->RemoveAt(iCluster);
2583 delete clusterArray;
2589 //_____________________________________________________________________________
2590 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint &p) const
2593 // Get track space point with index i
2594 // Origin: C.Cheshkov
2597 AliTRDcluster *cl = (AliTRDcluster *) fClusters->UncheckedAt(index);
2598 Int_t idet = cl->GetDetector();
2599 Int_t isector = fGeom->GetSector(idet);
2600 Int_t ichamber = fGeom->GetChamber(idet);
2601 Int_t iplan = fGeom->GetPlane(idet);
2603 local[0] = GetX(isector,iplan,cl->GetLocalTimeBin());
2604 local[1] = cl->GetY();
2605 local[2] = cl->GetZ();
2607 fGeom->RotateBack(idet,local,global);
2608 p.SetXYZ(global[0],global[1],global[2]);
2609 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
2612 iLayer = AliAlignObj::kTRD1;
2615 iLayer = AliAlignObj::kTRD2;
2618 iLayer = AliAlignObj::kTRD3;
2621 iLayer = AliAlignObj::kTRD4;
2624 iLayer = AliAlignObj::kTRD5;
2627 iLayer = AliAlignObj::kTRD6;
2630 Int_t modId = isector * fGeom->Ncham() + ichamber;
2631 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
2632 p.SetVolumeID(volid);
2638 //_____________________________________________________________________________
2639 void AliTRDtracker::CookLabel(AliKalmanTrack *pt, Float_t wrong) const
2642 // This cooks a label. Mmmmh, smells good...
2645 Int_t label = 123456789;
2649 Int_t ncl = pt->GetNumberOfClusters();
2651 const Int_t kRange = fTrSec[0]->GetOuterTimeBin() + 1;
2655 Int_t **s = new Int_t* [kRange];
2656 for (i = 0; i < kRange; i++) {
2657 s[i] = new Int_t[2];
2659 for (i = 0; i < kRange; i++) {
2668 for (i = 0; i < ncl; i++) {
2669 index = pt->GetClusterIndex(i);
2670 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2676 for (i = 0; i < ncl; i++) {
2677 index = pt->GetClusterIndex(i);
2678 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2679 for (Int_t k = 0; k < 3; k++) {
2680 label = c->GetLabel(k);
2681 labelAdded = kFALSE;
2684 while ((!labelAdded) && (j < kRange)) {
2685 if ((s[j][0] == label) ||
2688 s[j][1] = s[j][1] + 1;
2700 for (i = 0; i < kRange; i++) {
2701 if (s[i][1] > max) {
2707 for (i = 0; i < kRange; i++) {
2713 if ((1.0 - Float_t(max)/ncl) > wrong) {
2717 pt->SetLabel(label);
2721 //_____________________________________________________________________________
2722 void AliTRDtracker::UseClusters(const AliKalmanTrack *t, Int_t from) const
2725 // Use clusters, but don't abuse them!
2728 const Float_t kmaxchi2 = 18;
2729 const Float_t kmincl = 10;
2731 AliTRDtrack *track = (AliTRDtrack *) t;
2733 Int_t ncl = t->GetNumberOfClusters();
2734 for (Int_t i = from; i < ncl; i++) {
2735 Int_t index = t->GetClusterIndex(i);
2736 AliTRDcluster *c = (AliTRDcluster *) fClusters->UncheckedAt(index);
2737 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2738 if (track->fTracklets[iplane].GetChi2() > kmaxchi2) {
2741 if (track->fTracklets[iplane].GetN() < kmincl) {
2744 if (!(c->IsUsed())) {
2751 //_____________________________________________________________________________
2752 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2755 // Parametrised "expected" error of the cluster reconstruction in Y
2758 Double_t s = 0.08 * 0.08;
2763 //_____________________________________________________________________________
2764 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2767 // Parametrised "expected" error of the cluster reconstruction in Z
2770 Double_t s = 9.0 * 9.0 / 12.0;
2775 //_____________________________________________________________________________
2776 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2779 // Returns radial position which corresponds to time bin <localTB>
2780 // in tracking sector <sector> and plane <plane>
2783 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2784 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2786 return fTrSec[sector]->GetLayer(pl)->GetX();
2790 //_____________________________________________________________________________
2791 AliTRDtracker::AliTRDpropagationLayer
2792 ::AliTRDpropagationLayer(Double_t x, Double_t dx, Double_t rho
2793 , Double_t radLength, Int_t tbIndex, Int_t plane)
2802 ,fTimeBinIndex(tbIndex)
2815 // AliTRDpropagationLayer constructor
2818 for (Int_t i = 0; i < (Int_t) kZones; i++) {
2823 if (fTimeBinIndex >= 0) {
2824 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2825 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2828 for (Int_t i = 0; i < 5; i++) {
2829 fIsHole[i] = kFALSE;
2834 //_____________________________________________________________________________
2835 void AliTRDtracker::AliTRDpropagationLayer
2836 ::SetHole(Double_t Zmax, Double_t Ymax, Double_t rho
2837 , Double_t radLength, Double_t Yc, Double_t Zc)
2840 // Sets hole in the layer
2849 fHoleX0 = radLength;
2853 //_____________________________________________________________________________
2854 AliTRDtracker::AliTRDtrackingSector
2855 ::AliTRDtrackingSector(AliTRDgeometry *geo, Int_t gs)
2861 // AliTRDtrackingSector Constructor
2864 AliTRDpadPlane *padPlane = 0;
2865 AliTRDpropagationLayer *ppl = 0;
2867 // Get holes description from geometry
2868 Bool_t holes[AliTRDgeometry::kNcham];
2869 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
2870 holes[icham] = fGeom->IsHole(0,icham,gs);
2873 for (UInt_t i = 0; i < kMaxTimeBinIndex; i++) {
2874 fTimeBinIndex[i] = -1;
2882 // Add layers for each of the planes
2883 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2884 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2886 const Int_t kNchambers = AliTRDgeometry::Ncham();
2889 Double_t ymaxsensitive = 0;
2890 Double_t *zc = new Double_t[kNchambers];
2891 Double_t *zmax = new Double_t[kNchambers];
2892 Double_t *zmaxsensitive = new Double_t[kNchambers];
2894 AliTRDCommonParam *commonParam = AliTRDCommonParam::Instance();
2896 AliErrorGeneral("AliTRDtrackingSector::Ctor"
2897 ,"Could not get common parameters\n");
2901 for (Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
2903 ymax = fGeom->GetChamberWidth(plane) / 2.0;
2904 padPlane = commonParam->GetPadPlane(plane,0);
2905 ymaxsensitive = (padPlane->GetColSize(1) * padPlane->GetNcols() - 4.0) / 2.0;
2907 for (Int_t ch = 0; ch < kNchambers; ch++) {
2908 zmax[ch] = fGeom->GetChamberLength(plane,ch) / 2.0;
2909 Float_t pad = padPlane->GetRowSize(1);
2910 Float_t row0 = commonParam->GetRow0(plane,ch,0);
2911 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
2912 zmaxsensitive[ch] = Float_t(nPads) * pad / 2.0;
2913 zc[ch] = -(pad * nPads) / 2.0 + row0;
2916 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
2917 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
2918 rho = 0.00295 * 0.85; //????
2921 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
2922 //Double_t xbottom = x0 - dxDrift;
2923 //Double_t xtop = x0 + dxAmp;
2925 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2926 for (Int_t iTime = 0; iTime < nTimeBins; iTime++) {
2928 Double_t xlayer = iTime * dx - dxAmp;
2929 //if (xlayer<0) xlayer = dxAmp / 2.0;
2932 tbIndex = CookTimeBinIndex(plane,iTime);
2933 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex,plane);
2934 ppl->SetYmax(ymax,ymaxsensitive);
2935 ppl->SetZ(zc,zmax,zmaxsensitive);
2936 ppl->SetHoles(holes);
2947 delete [] zmaxsensitive;
2951 //_____________________________________________________________________________
2952 AliTRDtracker::AliTRDtrackingSector
2953 ::AliTRDtrackingSector(const AliTRDtrackingSector &/*t*/)
2964 //_____________________________________________________________________________
2965 Int_t AliTRDtracker::AliTRDtrackingSector
2966 ::CookTimeBinIndex(Int_t plane, Int_t localTB) const
2969 // depending on the digitization parameters calculates "global"
2970 // time bin index for timebin <localTB> in plane <plane>
2974 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2975 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1;
2987 //_____________________________________________________________________________
2988 void AliTRDtracker::AliTRDtrackingSector
2989 ::MapTimeBinLayers()
2992 // For all sensitive time bins sets corresponding layer index
2993 // in the array fTimeBins
2998 for (Int_t i = 0; i < fN; i++) {
3000 index = fLayers[i]->GetTimeBinIndex();
3005 if (index >= (Int_t) kMaxTimeBinIndex) {
3006 //AliWarning(Form("Index %d exceeds allowed maximum of %d!\n"
3007 // ,index,kMaxTimeBinIndex-1));
3011 fTimeBinIndex[index] = i;
3017 //_____________________________________________________________________________
3018 Int_t AliTRDtracker::AliTRDtrackingSector
3019 ::GetLayerNumber(Double_t x) const
3022 // Returns the number of time bin which in radial position is closest to <x>
3025 if (x >= fLayers[fN-1]->GetX()) {
3028 if (x <= fLayers[ 0]->GetX()) {
3034 Int_t m = (b + e) / 2;
3036 for ( ; b < e; m = (b + e) / 2) {
3037 if (x > fLayers[m]->GetX()) {
3045 if (TMath::Abs(x - fLayers[m]->GetX()) > TMath::Abs(x - fLayers[m+1]->GetX())) {
3054 //_____________________________________________________________________________
3055 Int_t AliTRDtracker::AliTRDtrackingSector
3056 ::GetInnerTimeBin() const
3059 // Returns number of the innermost SENSITIVE propagation layer
3062 return GetLayerNumber(0);
3066 //_____________________________________________________________________________
3067 Int_t AliTRDtracker::AliTRDtrackingSector
3068 ::GetOuterTimeBin() const
3071 // Returns number of the outermost SENSITIVE time bin
3074 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3078 //_____________________________________________________________________________
3079 Int_t AliTRDtracker::AliTRDtrackingSector
3080 ::GetNumberOfTimeBins() const
3083 // Returns number of SENSITIVE time bins
3089 for (tb = kMaxTimeBinIndex - 1; tb >= 0; tb--) {
3090 layer = GetLayerNumber(tb);
3100 //_____________________________________________________________________________
3101 void AliTRDtracker::AliTRDtrackingSector
3102 ::InsertLayer(AliTRDpropagationLayer *pl)
3105 // Insert layer <pl> in fLayers array.
3106 // Layers are sorted according to X coordinate.
3109 if (fN == ((Int_t) kMaxLayersPerSector)) {
3110 //AliWarning("Too many layers !\n");
3119 Int_t i = Find(pl->GetX());
3121 memmove(fLayers+i+1,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3128 //_____________________________________________________________________________
3129 Int_t AliTRDtracker::AliTRDtrackingSector
3130 ::Find(Double_t x) const
3133 // Returns index of the propagation layer nearest to X
3136 if (x <= fLayers[0]->GetX()) {
3140 if (x > fLayers[fN-1]->GetX()) {
3146 Int_t m = (b + e) / 2;
3148 for (; b < e; m = (b + e) / 2) {
3149 if (x > fLayers[m]->GetX()) {
3161 //_____________________________________________________________________________
3162 void AliTRDtracker::AliTRDpropagationLayer
3163 ::SetZ(Double_t *center, Double_t *w, Double_t *wsensitive )
3166 // set centers and the width of sectors
3169 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3170 fZc[icham] = center[icham];
3171 fZmax[icham] = w[icham];
3172 fZmaxSensitive[icham] = wsensitive[icham];
3177 //_____________________________________________________________________________
3178 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3181 // set centers and the width of sectors
3186 for (Int_t icham = 0; icham < AliTRDgeometry::kNcham; icham++) {
3187 fIsHole[icham] = holes[icham];
3195 //_____________________________________________________________________________
3196 void AliTRDtracker::AliTRDpropagationLayer
3197 ::InsertCluster(AliTRDcluster *c, UInt_t index)
3200 // Insert cluster in cluster array.
3201 // Clusters are sorted according to Y coordinate.
3204 if (fTimeBinIndex < 0) {
3205 //AliWarning("Attempt to insert cluster into non-sensitive time bin!\n");
3209 if (fN == (Int_t) kMaxClusterPerTimeBin) {
3210 //AliWarning("Too many clusters !\n");
3216 fClusters[fN++] = c;
3220 Int_t i = Find(c->GetY());
3221 memmove(fClusters+i+1,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3222 memmove(fIndex +i+1,fIndex +i,(fN-i)*sizeof(UInt_t));
3229 //_____________________________________________________________________________
3230 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const
3233 // Returns index of the cluster nearest in Y
3239 if (y <= fClusters[0]->GetY()) {
3242 if (y > fClusters[fN-1]->GetY()) {
3248 Int_t m = (b + e) / 2;
3250 for ( ; b < e; m = (b + e) / 2) {
3251 if (y > fClusters[m]->GetY()) {
3263 //_____________________________________________________________________________
3264 Int_t AliTRDtracker::AliTRDpropagationLayer
3265 ::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad
3266 , Float_t maxroadz) const
3269 // Returns index of the cluster nearest to the given y,z
3274 Float_t mindist = maxroad;
3276 for (Int_t i = Find(y-maxroad); i < maxn; i++) {
3277 AliTRDcluster *c = (AliTRDcluster *) (fClusters[i]);
3278 Float_t ycl = c->GetY();
3279 if (ycl > (y + maxroad)) {
3282 if (TMath::Abs(c->GetZ() - z) > maxroadz) {
3285 if (TMath::Abs(ycl - y) < mindist) {
3286 mindist = TMath::Abs(ycl - y);
3295 //_____________________________________________________________________________
3296 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster *c)
3299 // Returns correction factor for tilted pads geometry
3302 Int_t det = c->GetDetector();
3303 Int_t plane = fGeom->GetPlane(det);
3304 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
3305 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3315 //_____________________________________________________________________________
3316 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack &TRDtrack)
3319 // This is setting fdEdxPlane and fTimBinPlane
3320 // Sums up the charge in each plane for track TRDtrack and also get the
3321 // Time bin for Max. Cluster
3322 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
3325 Double_t clscharge[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3326 Double_t maxclscharge[AliESDtrack::kNPlane];
3327 Int_t nCluster[AliESDtrack::kNPlane][AliESDtrack::kNSlice];
3328 Int_t timebin[AliESDtrack::kNPlane];
3330 // Initialization of cluster charge per plane.
3331 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3332 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3333 clscharge[iPlane][iSlice] = 0.0;
3334 nCluster[iPlane][iSlice] = 0;
3338 // Initialization of cluster charge per plane.
3339 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3340 timebin[iPlane] = -1;
3341 maxclscharge[iPlane] = 0.0;
3344 // Loop through all clusters associated to track TRDtrack
3345 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
3346 for (Int_t iClus = 0; iClus < nClus; iClus++) {
3347 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
3348 Int_t index = TRDtrack.GetClusterIndex(iClus);
3349 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
3353 Int_t tb = pTRDcluster->GetLocalTimeBin();
3357 Int_t detector = pTRDcluster->GetDetector();
3358 Int_t iPlane = fGeom->GetPlane(detector);
3359 Int_t iSlice = tb * AliESDtrack::kNSlice / AliTRDtrack::kNtimeBins;
3360 clscharge[iPlane][iSlice] = clscharge[iPlane][iSlice] + charge;
3361 if (charge > maxclscharge[iPlane]) {
3362 maxclscharge[iPlane] = charge;
3363 timebin[iPlane] = tb;
3365 nCluster[iPlane][iSlice]++;
3366 } // End of loop over cluster
3368 // Setting the fdEdxPlane and fTimBinPlane variabales
3369 Double_t totalCharge = 0.0;
3371 for (Int_t iPlane = 0; iPlane < AliESDtrack::kNPlane; iPlane++) {
3372 for (Int_t iSlice = 0; iSlice < AliESDtrack::kNSlice; iSlice++) {
3373 if (nCluster[iPlane][iSlice]) {
3374 clscharge[iPlane][iSlice] /= nCluster[iPlane][iSlice];
3376 TRDtrack.SetPIDsignals(clscharge[iPlane][iSlice],iPlane,iSlice);
3377 totalCharge = totalCharge+clscharge[iPlane][iSlice];
3379 TRDtrack.SetPIDTimBin(timebin[iPlane],iPlane);
3382 // Still needed ????
3384 // Int_t nc=TRDtrack.GetNumberOfClusters();
3386 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
3388 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3389 // TRDtrack.SetPIDsignals(dedx, iPlane);
3390 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
3395 //_____________________________________________________________________________
3396 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1
3397 , AliTRDtrack *track
3398 , Int_t *clusters, AliTRDtracklet &tracklet)
3402 // Try to find nearest clusters to the track in timebins from t0 to t1
3404 // Correction coeficients - depend on TRD parameters - to be changed accordingly
3410 Double_t xmean = 0.0; // Reference x
3411 Double_t dz[10][100];
3412 Double_t dy[10][100];
3416 Int_t indexes[10][100]; // Indexes of the clusters in the road
3417 Int_t best[10][100]; // Index of best matching cluster
3418 AliTRDcluster *cl[10][100]; // Pointers to the clusters in the road
3420 for (Int_t it = 0; it < 100; it++) {
3427 for (Int_t ih = 0; ih < 10;ih++) {
3428 indexes[ih][it] = -2; // Reset indexes1
3430 dz[ih][it] = -100.0;
3431 dy[ih][it] = -100.0;
3436 Double_t x0 = track->GetX();
3437 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
3442 Int_t detector = -1;
3443 Float_t padlength = 0.0;
3444 AliTRDtrack track2(* track);
3445 Float_t snpy = track->GetSnp();
3446 Float_t tany = TMath::Sqrt(snpy*snpy / (1.0 - snpy*snpy));
3451 Double_t sy2 = ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
3452 Double_t sz2 = ExpectedSigmaZ2(x0,track->GetTgl());
3453 Double_t road = 15.0 * TMath::Sqrt(track->GetSigmaY2() + sy2);
3458 for (Int_t it = 0; it < t1-t0; it++) {
3460 Double_t maxChi2[2] = { fgkMaxChi2, fgkMaxChi2 };
3461 AliTRDpropagationLayer &timeBin = *(fTrSec[sector]->GetLayer(it+t0));
3463 continue; // No indexes1
3466 Int_t maxn = timeBin;
3467 x[it] = timeBin.GetX();
3468 track2.PropagateTo(x[it]);
3469 yt[it] = track2.GetY();
3470 zt[it] = track2.GetZ();
3472 Double_t y = yt[it];
3473 Double_t z = zt[it];
3474 Double_t chi2 = 1000000.0;
3478 // Find 2 nearest cluster at given time bin
3480 for (Int_t i = timeBin.Find(y - road); i < maxn; i++) {
3482 AliTRDcluster *c = (AliTRDcluster *) (timeBin[i]);
3483 h01 = GetTiltFactor(c);
3485 Int_t det = c->GetDetector();
3486 plane = fGeom->GetPlane(det);
3487 padlength = TMath::Sqrt(c->GetSigmaZ2() * 12.0);
3489 //if (c->GetLocalTimeBin()==0) continue;
3490 if (c->GetY() > (y + road)) {
3493 if ((c->GetZ() - z) * (c->GetZ() - z) > (12.0 * sz2)) {
3497 Double_t dist = TMath::Abs(c->GetZ() - z);
3498 if (dist > (0.5 * padlength + 6.0 * sigmaz)) {
3499 continue; // 6 sigma boundary cut
3501 Double_t cost = 0.0;
3502 // Sigma boundary cost function
3503 if (dist> (0.5 * padlength - sigmaz)){
3504 cost = (dist - 0.5*padlength) / (2.0 * sigmaz);
3506 cost = (cost + 1.0) * (cost + 1.0);
3512 //Int_t label = TMath::Abs(track->GetLabel());
3513 //if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
3514 chi2 = track2.GetPredictedChi2(c,h01) + cost;
3517 if (chi2 > maxChi2[1]) {
3520 detector = c->GetDetector();
3521 // Store the clusters in the road
3522 for (Int_t ih = 2; ih < 9; ih++) {
3523 if (cl[ih][it] == 0) {
3525 indexes[ih][it] = timeBin.GetIndex(i); // Index - 9 - reserved for outliers
3530 if (chi2 < maxChi2[0]) {
3531 maxChi2[1] = maxChi2[0];
3533 indexes[1][it] = indexes[0][it];
3534 cl[1][it] = cl[0][it];
3535 indexes[0][it] = timeBin.GetIndex(i);
3541 indexes[1][it] = timeBin.GetIndex(i);
3555 xmean /= Float_t(nfound); // Middle x
3556 track2.PropagateTo(xmean); // Propagate track to the center
3559 // Choose one of the variants
3564 Double_t sumdy = 0.0;
3565 Double_t sumdy2 = 0.0;
3566 Double_t sumx = 0.0;
3567 Double_t sumxy = 0.0;
3568 Double_t sumx2 = 0.0;
3569 Double_t mpads = 0.0;
3575 Double_t moffset[10]; // Mean offset
3576 Double_t mean[10]; // Mean value
3577 Double_t angle[10]; // Angle
3579 Double_t smoffset[10]; // Sigma of mean offset
3580 Double_t smean[10]; // Sigma of mean value
3581 Double_t sangle[10]; // Sigma of angle
3582 Double_t smeanangle[10]; // Correlation
3584 Double_t sigmas[10];
3585 Double_t tchi2s[10]; // Chi2s for tracklet
3587 for (Int_t it = 0; it < 10; it++) {
3593 moffset[it] = 0.0; // Mean offset
3594 mean[it] = 0.0; // Mean value
3595 angle[it] = 0.0; // Angle
3597 smoffset[it] = 1.0e10; // Sigma of mean offset
3598 smean[it] = 1.0e10; // Sigma of mean value
3599 sangle[it] = 1.0e10; // Sigma of angle
3600 smeanangle[it] = 0.0; // Correlation
3602 sigmas[it] = 1.0e10;
3603 tchi2s[it] = 1.0e10; // Chi2s for tracklet
3610 for (Int_t it = 0; it < t1 - t0; it++) {
3614 for (Int_t dt = -3; dt <= 3; dt++) {
3618 if (it+dt > t1-t0) {
3621 if (!cl[0][it+dt]) {
3624 zmean[it] += cl[0][it+dt]->GetZ();
3627 zmean[it] /= nmean[it];
3630 for (Int_t it = 0; it < t1 - t0; it++) {
3634 for (Int_t ih = 0; ih < 10; ih++) {
3635 dz[ih][it] = -100.0;
3636 dy[ih][it] = -100.0;
3640 Double_t xcluster = cl[ih][it]->GetX();
3643 track2.GetProlongation(xcluster,ytrack,ztrack );
3644 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // Calculate distance from track in z
3645 dy[ih][it] = cl[ih][it]->GetY() + dz[ih][it]*h01 - ytrack; // and in y
3652 if ((TMath::Abs(cl[0][it]->GetZ()-zmean[it]) > padlength * 0.8) &&
3654 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it]) < padlength * 0.5) {
3662 // Iterative choice of "best path"
3664 Int_t label = TMath::Abs(track->GetLabel());
3667 for (Int_t iter = 0; iter < 9; iter++) {
3682 for (Int_t it = 0; it < t1 - t0; it++) {
3684 if (!cl[best[iter][it]][it]) {
3688 // Calculates pad-row changes
3689 Double_t zbefore = cl[best[iter][it]][it]->GetZ();
3690 Double_t zafter = cl[best[iter][it]][it]->GetZ();
3691 for (Int_t itd = it - 1; itd >= 0; itd--) {
3692 if (cl[best[iter][itd]][itd]) {
3693 zbefore = cl[best[iter][itd]][itd]->GetZ();
3697 for (Int_t itd = it + 1; itd < t1 - t0; itd++) {
3698 if (cl[best[iter][itd]][itd]) {
3699 zafter = cl[best[iter][itd]][itd]->GetZ();
3703 if ((TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore) > 0.1) &&
3704 (TMath::Abs(cl[best[iter][it]][it]->GetZ()- zafter) > 0.1)) {
3708 Double_t dx = x[it]-xmean; // Distance to reference x
3709 sumz += cl[best[iter][it]][it]->GetZ();
3711 sumdy += dy[best[iter][it]][it];
3712 sumdy2 += dy[best[iter][it]][it]*dy[best[iter][it]][it];
3715 sumxy += dx*dy[best[iter][it]][it];
3716 mpads += cl[best[iter][it]][it]->GetNPads();
3717 if ((cl[best[iter][it]][it]->GetLabel(0) == label) ||
3718 (cl[best[iter][it]][it]->GetLabel(1) == label) ||
3719 (cl[best[iter][it]][it]->GetLabel(2) == label)) {
3729 // calculates line parameters
3731 Double_t det = sum*sumx2 - sumx*sumx;
3732 angle[iter] = (sum*sumxy - sumx*sumdy) / det;
3733 mean[iter] = (sumx2*sumdy - sumx*sumxy) / det;
3734 meanz[iter] = sumz / sum;
3735 moffset[iter] = sumdy / sum;
3736 mpads /= sum; // Mean number of pads
3738 Double_t sigma2 = 0.0; // Normalized residuals - for line fit
3739 Double_t sigma1 = 0.0; // Normalized residuals - constant fit
3741 for (Int_t it = 0; it < t1 - t0; it++) {
3742 if (!cl[best[iter][it]][it]) {
3745 Double_t dx = x[it] - xmean;
3746 Double_t ytr = mean[iter] + angle[iter] * dx;
3747 sigma2 += (dy[best[iter][it]][it] - ytr)
3748 * (dy[best[iter][it]][it] - ytr);
3749 sigma1 += (dy[best[iter][it]][it] - moffset[iter])
3750 * (dy[best[iter][it]][it] - moffset[iter]);
3753 sigma2 /= (sum - 2); // Normalized residuals
3754 sigma1 /= (sum - 1); // Normalized residuals
3755 smean[iter] = sigma2 * (sumx2 / det); // Estimated error2 of mean
3756 sangle[iter] = sigma2 * ( sum / det); // Estimated error2 of angle
3757 smeanangle[iter] = sigma2 * (-sumx / det); // Correlation
3758 sigmas[iter] = TMath::Sqrt(sigma1);
3759 smoffset[iter] = (sigma1 / sum) + 0.01*0.01; // Sigma of mean offset + unisochronity sigma
3762 // Iterative choice of "better path"
3764 for (Int_t it = 0; it < t1 - t0; it++) {
3766 if (!cl[best[iter][it]][it]) {
3770 // Add unisochronity + angular effect contribution
3771 Double_t sigmatr2 = smoffset[iter] + 0.5*tany*tany;
3772 Double_t sweight = 1.0/sigmatr2 + 1.0/track->GetSigmaY2();
3773 Double_t weighty = (moffset[iter] / sigmatr2) / sweight; // Weighted mean
3774 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1 + track->GetSigmaY2());
3775 Double_t mindist = 100000.0;
3778 for (Int_t ih = 0; ih < 10; ih++) {
3782 Double_t dist2 = (dy[ih][it] - weighty) / sigmacl;
3783 dist2 *= dist2; // Chi2 distance
3784 if (dist2 < mindist) {
3789 best[iter+1][it] = ihbest;
3793 // Update best hypothesy if better chi2 according tracklet position and angle
3795 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3796 Double_t sa2 = sangle[iter] + track->GetSigmaSnp2(); // track->fCee;
3797 Double_t say = track->GetSigmaSnpY(); // track->fCey;
3798 //Double_t chi20 = mean[bestiter]*mean[bestiter ] / sy2+angle[bestiter]*angle[bestiter]/sa2;
3799 //Double_t chi21 = mean[iter]*mean[iter] / sy2+angle[iter]*angle[iter]/sa2;
3801 Double_t detchi = sy2*sa2 - say*say;
3802 Double_t invers[3] = {sa2/detchi,sy2/detchi,-say/detchi}; // Inverse value of covariance matrix
3804 Double_t chi20 = mean[bestiter] * mean[bestiter] * invers[0]
3805 + angle[bestiter] * angle[bestiter] * invers[1]
3806 + 2.0 * mean[bestiter] * angle[bestiter] * invers[2];
3807 Double_t chi21 = mean[iter] * mean[iter] * invers[0]
3808 + angle[iter] * angle[iter] * invers[1]
3809 + 2.0 * mean[iter] * angle[iter] * invers[2];
3810 tchi2s[iter] = chi21;
3812 if ((changes[iter] <= changes[bestiter]) &&
3822 Double_t sigma2 = sigmas[0]; // Choose as sigma from 0 iteration
3823 Short_t maxpos = -1;
3824 Float_t maxcharge = 0.0;
3825 Short_t maxpos4 = -1;
3826 Float_t maxcharge4 = 0.0;
3827 Short_t maxpos5 = -1;
3828 Float_t maxcharge5 = 0.0;
3830 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
3831 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
3833 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(
3834 AliTRDcalibDB::Instance()->GetVdrift(0,0,0));
3835 Double_t expectederr = sigma2*sigma2 + 0.01*0.01;
3837 expectederr += (mpads - 3.5) * 0.04;
3839 if (changes[bestiter] > 1) {
3840 expectederr += changes[bestiter] * 0.01;
3842 expectederr += (0.03 * (tany-exB)*(tany-exB)) * 15.0;
3843 //if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
3844 //expectederr+=10000;
3846 for (Int_t it = 0; it < t1 - t0; it++) {
3848 if (!cl[best[bestiter][it]][it]) {
3852 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // Set cluster error
3853 if (!cl[best[bestiter][it]][it]->IsUsed()) {
3854 cl[best[bestiter][it]][it]->SetY(cl[best[bestiter][it]][it]->GetY());
3855 //cl[best[bestiter][it]][it]->Use();
3858 // Time bins with maximal charge
3859 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
3860 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3861 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3864 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3865 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3866 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3867 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3871 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3872 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3873 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3874 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3878 // Time bins with maximal charge
3879 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge) {
3880 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3881 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3884 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge4) {
3885 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 4) {
3886 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3887 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3891 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ()) > maxcharge5) {
3892 if (cl[best[bestiter][it]][it]->GetLocalTimeBin() >= 5) {
3893 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3894 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3898 clusters[it+t0] = indexes[best[bestiter][it]][it];
3900 // Still needed ????
3901 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 &&
3902 //cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0]
3903 // = indexes[best[bestiter][it]][it]; //Test
3908 // Set tracklet parameters
3910 Double_t trackleterr2 = smoffset[bestiter] + 0.01*0.01;
3912 trackleterr2 += (mpads - 3.5) * 0.04;
3914 trackleterr2 += changes[bestiter] * 0.01;
3915 trackleterr2 *= TMath::Max(14.0 - nfound,1.0);
3916 trackleterr2 += 0.2 * (tany-exB)*(tany-exB);
3918 // Set tracklet parameters
3920 ,track2.GetY() + moffset[bestiter]
3924 tracklet.SetTilt(h01);
3925 tracklet.SetP0(mean[bestiter]);
3926 tracklet.SetP1(angle[bestiter]);
3927 tracklet.SetN(nfound);
3928 tracklet.SetNCross(changes[bestiter]);
3929 tracklet.SetPlane(plane);
3930 tracklet.SetSigma2(expectederr);
3931 tracklet.SetChi2(tchi2s[bestiter]);
3932 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
3933 track->fTracklets[plane] = tracklet;
3934 track->fNWrong += nbad[0];
3939 TClonesArray array0("AliTRDcluster");
3940 TClonesArray array1("AliTRDcluster");
3941 array0.ExpandCreateFast(t1 - t0 + 1);
3942 array1.ExpandCreateFast(t1 - t0 + 1);
3943 TTreeSRedirector &cstream = *fDebugStreamer;
3944 AliTRDcluster dummy;
3948 for (Int_t it = 0; it < t1 - t0; it++) {
3949 dy0[it] = dy[0][it];
3950 dyb[it] = dy[best[bestiter][it]][it];
3952 new(array0[it]) AliTRDcluster(*cl[0][it]);
3955 new(array0[it]) AliTRDcluster(dummy);
3957 if(cl[best[bestiter][it]][it]) {
3958 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
3961 new(array1[it]) AliTRDcluster(dummy);
3964 TGraph graph0(t1-t0,x,dy0);
3965 TGraph graph1(t1-t0,x,dyb);
3966 TGraph graphy(t1-t0,x,yt);
3967 TGraph graphz(t1-t0,x,zt);
3969 if (AliTRDReconstructor::StreamLevel() > 0) {
3970 cstream << "tracklet"
3971 << "track.=" << track // Track parameters
3972 << "tany=" << tany // Tangent of the local track angle
3973 << "xmean=" << xmean // Xmean - reference x of tracklet
3974 << "tilt=" << h01 // Tilt angle
3975 << "nall=" << nall // Number of foundable clusters
3976 << "nfound=" << nfound // Number of found clusters
3977 << "clfound=" << clfound // Total number of found clusters in road
3978 << "mpads=" << mpads // Mean number of pads per cluster
3979 << "plane=" << plane // Plane number
3980 << "detector=" << detector // Detector number
3981 << "road=" << road // The width of the used road
3982 << "graph0.=" << &graph0 // x - y = dy for closest cluster
3983 << "graph1.=" << &graph1 // x - y = dy for second closest cluster
3984 << "graphy.=" << &graphy // y position of the track
3985 << "graphz.=" << &graphz // z position of the track
3986 //<< "fCl.=" << &array0 // closest cluster
3987 //<< "fCl2.=" << &array1 // second closest cluster
3988 << "maxpos=" << maxpos // Maximal charge postion
3989 << "maxcharge=" << maxcharge // Maximal charge
3990 << "maxpos4=" << maxpos4 // Maximal charge postion - after bin 4
3991 << "maxcharge4=" << maxcharge4 // Maximal charge - after bin 4
3992 << "maxpos5=" << maxpos5 // Maximal charge postion - after bin 5
3993 << "maxcharge5=" << maxcharge5 // Maximal charge - after bin 5
3994 << "bestiter=" << bestiter // Best iteration number
3995 << "tracklet.=" << &tracklet // Corrspond to the best iteration
3996 << "tchi20=" << tchi2s[0] // Chi2 of cluster in the 0 iteration
3997 << "tchi2b=" << tchi2s[bestiter] // Chi2 of cluster in the best iteration
3998 << "sigmas0=" << sigmas[0] // Residuals sigma
3999 << "sigmasb=" << sigmas[bestiter] // Residulas sigma
4000 << "ngood0=" << ngood[0] // Number of good clusters in 0 iteration
4001 << "nbad0=" << nbad[0] // Number of bad clusters in 0 iteration
4002 << "ngoodb=" << ngood[bestiter] // in best iteration
4003 << "nbadb=" << nbad[bestiter] // in best iteration
4004 << "changes0=" << changes[0] // Changes of pardrows in iteration number 0
4005 << "changesb=" << changes[bestiter] // Changes of pardrows in best iteration
4006 << "moffset0=" << moffset[0] // Offset fixing angle in iter=0
4007 << "smoffset0=" << smoffset[0] // Sigma of offset fixing angle in iter=0
4008 << "moffsetb=" << moffset[bestiter] // Offset fixing angle in iter=best
4009 << "smoffsetb=" << smoffset[bestiter] // Sigma of offset fixing angle in iter=best
4010 << "mean0=" << mean[0] // Mean dy in iter=0;
4011 << "smean0=" << smean[0] // Sigma of mean dy in iter=0
4012 << "meanb=" << mean[bestiter] // Mean dy in iter=best
4013 << "smeanb=" << smean[bestiter] // Sigma of mean dy in iter=best
4014 << "angle0=" << angle[0] // Angle deviation in the iteration number 0
4015 << "sangle0=" << sangle[0] // Sigma of angular deviation in iteration number 0
4016 << "angleb=" << angle[bestiter] // Angle deviation in the best iteration
4017 << "sangleb=" << sangle[bestiter] // Sigma of angle deviation in the best iteration
4018 << "expectederr=" << expectederr // Expected error of cluster position
4026 //_____________________________________________________________________________
4027 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist
4028 , Int_t *outlist, Bool_t down)
4031 // Sort eleements according occurancy
4032 // The size of output array has is 2*n
4035 Int_t *sindexS = new Int_t[n]; // Temporary array for sorting
4036 Int_t *sindexF = new Int_t[2*n];
4037 for (Int_t i = 0; i < n; i++) {
4041 TMath::Sort(n,inlist,sindexS,down);
4043 Int_t last = inlist[sindexS[0]];
4046 sindexF[0+n] = last;
4050 for (Int_t i = 1; i < n; i++) {
4051 val = inlist[sindexS[i]];
4053 sindexF[countPos]++;
4057 sindexF[countPos+n] = val;
4058 sindexF[countPos]++;
4066 // Sort according frequency
4067 TMath::Sort(countPos,sindexF,sindexS,kTRUE);
4069 for (Int_t i = 0; i < countPos; i++) {
4070 outlist[2*i ] = sindexF[sindexS[i]+n];
4071 outlist[2*i+1] = sindexF[sindexS[i]];
4081 //_____________________________________________________________________________
4082 AliTRDtrack *AliTRDtracker::RegisterSeed(AliTRDseed *seeds, Double_t *params)
4088 Double_t alpha = AliTRDgeometry::GetAlpha();
4089 Double_t shift = AliTRDgeometry::GetAlpha()/2.0;
4093 c[ 1] = 0.0; c[ 2] = 2.0;
4094 c[ 3] = 0.0; c[ 4] = 0.0; c[ 5] = 0.02;
4095 c[ 6] = 0.0; c[ 7] = 0.0; c[ 8] = 0.0; c[ 9] = 0.1;
4096 c[10] = 0.0; c[11] = 0.0; c[12] = 0.0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4099 AliTRDcluster *cl = 0;
4101 for (Int_t ilayer = 0; ilayer < 6; ilayer++) {
4102 if (seeds[ilayer].IsOK()) {
4103 for (Int_t itime = 22; itime > 0; itime--) {
4104 if (seeds[ilayer].fIndexes[itime] > 0) {
4105 index = seeds[ilayer].fIndexes[itime];
4106 cl = seeds[ilayer].fClusters[itime];
4119 AliTRDtrack *track = new AliTRDtrack(cl
4124 ,params[6]*alpha+shift);
4125 track->PropagateTo(params[0]-5.0);
4126 track->ResetCovariance(1);
4128 Int_t rc = FollowBackProlongation(*track);
4135 CookdEdxTimBin(*track);
4136 CookLabel(track,0.9);