1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 ///////////////////////////////////////////////////////////////////////////////
20 // The standard TRD tracker //
21 // Based on Kalman filltering approach //
23 ///////////////////////////////////////////////////////////////////////////////
25 #include <Riostream.h>
29 #include <TObjArray.h>
31 #include "AliTRDgeometry.h"
32 #include "AliTRDpadPlane.h"
33 #include "AliTRDgeometryFull.h"
34 #include "AliTRDcluster.h"
35 #include "AliTRDtrack.h"
38 #include "AliTRDcalibDB.h"
39 #include "AliTRDCommonParam.h"
41 #include "TTreeStream.h"
43 #include "AliTRDtracker.h"
44 #include "TLinearFitter.h"
45 #include "AliRieman.h"
46 #include "AliTrackPointArray.h"
47 #include "AliAlignObj.h"
48 #include "AliTRDReconstructor.h"
51 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.;
59 const Double_t AliTRDtracker::fgkMaxSnp = 0.95; // correspond to tan = 3
60 const Double_t AliTRDtracker::fgkMaxStep = 2.; // maximal step size in propagation
68 //____________________________________________________________________
69 AliTRDtracker::AliTRDtracker():AliTracker(),
81 // Default constructor
83 for(Int_t i=0;i<kTrackingSectors;i++) fTrSec[i]=0;
84 for(Int_t j=0;j<5;j++)
85 for(Int_t k=0;k<18;k++) fHoles[j][k]=kFALSE;
88 //____________________________________________________________________
89 AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker()
95 fAddTRDseeds = kFALSE;
99 TDirectory *savedir=gDirectory;
100 TFile *in=(TFile*)geomfile;
102 printf("AliTRDtracker::AliTRDtracker(): geometry file is not open!\n");
103 printf(" FULL TRD geometry and DEFAULT TRD parameter will be used\n");
107 fGeom = (AliTRDgeometry*) in->Get("TRDgeometry");
111 // printf("Found geometry version %d on file \n", fGeom->IsVersion());
114 printf("AliTRDtracker::AliTRDtracker(): can't find TRD geometry!\n");
115 fGeom = new AliTRDgeometryFull();
116 fGeom->SetPHOShole();
117 fGeom->SetRICHhole();
119 fGeom->ReadGeoMatrices();
125 fClusters = new TObjArray(2000);
127 fSeeds = new TObjArray(2000);
129 fTracks = new TObjArray(1000);
131 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
132 Int_t trS = CookSectorIndex(geomS);
133 fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS);
134 for (Int_t icham=0;icham<AliTRDgeometry::kNcham; icham++){
135 fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS);
138 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
139 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
140 if(tiltAngle < 0.1) {
144 fTimeBinsPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
146 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
151 //___________________________________________________________________
152 AliTRDtracker::~AliTRDtracker()
155 // Destructor of AliTRDtracker
172 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
173 delete fTrSec[geomS];
175 if (fDebugStreamer) {
176 //fDebugStreamer->Close();
177 delete fDebugStreamer;
181 //_____________________________________________________________________
184 Int_t AliTRDtracker::LocalToGlobalID(Int_t lid){
186 // transform internal TRD ID to global detector ID
188 Int_t isector = fGeom->GetSector(lid);
189 Int_t ichamber= fGeom->GetChamber(lid);
190 Int_t iplan = fGeom->GetPlane(lid);
192 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
195 iLayer = AliAlignObj::kTRD1;
198 iLayer = AliAlignObj::kTRD2;
201 iLayer = AliAlignObj::kTRD3;
204 iLayer = AliAlignObj::kTRD4;
207 iLayer = AliAlignObj::kTRD5;
210 iLayer = AliAlignObj::kTRD6;
213 Int_t modId = isector*fGeom->Ncham()+ichamber;
214 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
218 Int_t AliTRDtracker::GlobalToLocalID(Int_t gid){
220 // transform global detector ID to local detector ID
223 AliAlignObj::ELayerID layerId = AliAlignObj::VolUIDToLayer(gid, modId);
224 Int_t isector = modId/fGeom->Ncham();
225 Int_t ichamber = modId%fGeom->Ncham();
228 case AliAlignObj::kTRD1:
231 case AliAlignObj::kTRD2:
234 case AliAlignObj::kTRD3:
237 case AliAlignObj::kTRD4:
240 case AliAlignObj::kTRD5:
243 case AliAlignObj::kTRD6:
249 if (iLayer<0) return -1;
250 Int_t lid = fGeom->GetDetector(iLayer,ichamber,isector);
255 Bool_t AliTRDtracker::Transform(AliTRDcluster * cluster){
259 const Double_t kX0shift = 2.52; // magic constants for geo manager transformation
260 const Double_t kX0shift5 = 3.05; //
263 // apply alignment and calibration to transform cluster
266 Int_t detector = cluster->GetDetector();
267 Int_t plane = fGeom->GetPlane(cluster->GetDetector());
268 Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
269 Int_t sector = fGeom->GetSector(cluster->GetDetector());
271 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
272 Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
276 Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
277 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
279 AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
280 AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
281 Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
282 Double_t localPos[3], localPosTracker[3];
283 localPos[0] = -cluster->GetX();
284 localPos[1] = cluster->GetY() - driftX*exB;
285 localPos[2] = cluster->GetZ() -zshiftIdeal;
287 cluster->SetY(cluster->GetY() - driftX*exB);
288 Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
289 cluster->SetX(xplane- cluster->GetX());
291 TGeoHMatrix * matrix = fGeom->GetCorrectionMatrix(cluster->GetDetector());
293 // no matrix found - if somebody used geometry with holes
294 AliError("Invalid Geometry - Default Geometry used\n");
297 matrix->LocalToMaster(localPos, localPosTracker);
302 (*fDebugStreamer)<<"Transform"<<
305 "Detector="<<detector<<
308 "Chamber="<<chamber<<
309 "lx0="<<localPosTracker[0]<<
310 "ly0="<<localPosTracker[1]<<
311 "lz0="<<localPosTracker[2]<<
316 cluster->SetX(localPosTracker[0]+kX0shift5);
318 cluster->SetX(localPosTracker[0]+kX0shift);
320 cluster->SetY(localPosTracker[1]);
321 cluster->SetZ(localPosTracker[2]);
325 // Bool_t AliTRDtracker::Transform(AliTRDcluster * cluster){
328 // const Double_t kDriftCorrection = 1.01; // drift coeficient correction
329 // const Double_t kTime0Cor = 0.32; // time0 correction
331 // const Double_t kX0shift = 2.52;
332 // const Double_t kX0shift5 = 3.05;
335 // // apply alignment and calibration to transform cluster
338 // Int_t detector = cluster->GetDetector();
339 // Int_t plane = fGeom->GetPlane(cluster->GetDetector());
340 // Int_t chamber = fGeom->GetChamber(cluster->GetDetector());
341 // Int_t sector = fGeom->GetSector(cluster->GetDetector());
343 // Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
344 // Double_t driftX = TMath::Max(cluster->GetX()-dxAmp*0.5,0.); // drift distance
348 // Double_t vdrift = AliTRDcalibDB::Instance()->GetVdrift(cluster->GetDetector(),0,0);
349 // Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(vdrift);
352 // AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
353 // AliTRDpadPlane * padPlane = commonParam->GetPadPlane(plane,chamber);
354 // Double_t zshiftIdeal = 0.5*(padPlane->GetRow0()+padPlane->GetRowEnd());
355 // Double_t localPos[3], globalPos[3], localPosTracker[3], localPosTracker2[3];
356 // localPos[2] = -cluster->GetX();
357 // localPos[0] = cluster->GetY() - driftX*exB;
358 // localPos[1] = cluster->GetZ() -zshiftIdeal;
359 // TGeoHMatrix * matrix = fGeom->GetGeoMatrix(cluster->GetDetector());
360 // matrix->LocalToMaster(localPos, globalPos);
362 // Double_t sectorAngle = 20.*(sector%18)+10;
363 // TGeoHMatrix rotSector;
364 // rotSector.RotateZ(sectorAngle);
365 // rotSector.LocalToMaster(globalPos, localPosTracker);
368 // TGeoHMatrix matrix2(*matrix);
369 // matrix2.MultiplyLeft(&rotSector);
370 // matrix2.LocalToMaster(localPos,localPosTracker2);
374 // cluster->SetY(cluster->GetY() - driftX*exB);
375 // Double_t xplane = (Double_t) AliTRDgeometry::GetTime0(plane);
376 // cluster->SetX(xplane- kDriftCorrection*(cluster->GetX()-kTime0Cor));
377 // (*fDebugStreamer)<<"Transform"<<
379 // "matrix.="<<matrix<<
380 // "matrix2.="<<&matrix2<<
381 // "Detector="<<detector<<
382 // "Sector="<<sector<<
384 // "Chamber="<<chamber<<
385 // "lx0="<<localPosTracker[0]<<
386 // "ly0="<<localPosTracker[1]<<
387 // "lz0="<<localPosTracker[2]<<
388 // "lx2="<<localPosTracker2[0]<<
389 // "ly2="<<localPosTracker2[1]<<
390 // "lz2="<<localPosTracker2[2]<<
394 // cluster->SetX(localPosTracker[0]+kX0shift5);
396 // cluster->SetX(localPosTracker[0]+kX0shift);
398 // cluster->SetY(localPosTracker[1]);
399 // cluster->SetZ(localPosTracker[2]);
403 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track) {
405 // Rotates the track when necessary
408 Double_t alpha = AliTRDgeometry::GetAlpha();
409 Double_t y = track->GetY();
410 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
412 //Int_t ns = AliTRDgeometry::kNsect;
413 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
417 if (!track->Rotate(alpha)) return kFALSE;
418 } else if (y <-ymax) {
420 if (!track->Rotate(-alpha)) return kFALSE;
427 AliTRDcluster * AliTRDtracker::GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin, UInt_t &index){
429 //try to find cluster in the backup list
431 AliTRDcluster * cl =0;
432 Int_t *indexes = track->GetBackupIndexes();
433 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
434 if (indexes[i]==0) break;
435 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
437 if (cli->GetLocalTimeBin()!=timebin) continue;
438 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
449 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * track){
451 //return last updated plane
453 Int_t *indexes = track->GetBackupIndexes();
454 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
455 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
457 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
458 if (iplane>lastplane) {
464 //___________________________________________________________________
465 Int_t AliTRDtracker::Clusters2Tracks(AliESD* event)
468 // Finds tracks within the TRD. The ESD event is expected to contain seeds
469 // at the outer part of the TRD. The seeds
470 // are found within the TRD if fAddTRDseeds is TRUE.
471 // The tracks are propagated to the innermost time bin
472 // of the TRD and the ESD event is updated
475 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
476 Float_t foundMin = fgkMinClustersInTrack * timeBins;
479 // Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
481 Int_t n = event->GetNumberOfTracks();
482 for (Int_t i=0; i<n; i++) {
483 AliESDtrack* seed=event->GetTrack(i);
484 ULong_t status=seed->GetStatus();
485 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
486 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
489 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
490 //seed2->ResetCovariance();
491 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
493 FollowProlongation(t);
494 if (t.GetNumberOfClusters() >= foundMin) {
496 CookLabel(pt, 1-fgkLabelFraction);
500 // cout<<found<<'\r';
503 if (PropagateToX(t,xTPC,fgkMaxStep)) {
504 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
510 cout<<"Number of loaded seeds: "<<nseed<<endl;
511 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
513 // after tracks from loaded seeds are found and the corresponding
514 // clusters are used, look for additional seeds from TRD
517 cout<<"Total number of found tracks: "<<found<<endl;
524 //_____________________________________________________________________________
525 Int_t AliTRDtracker::PropagateBack(AliESD* event) {
527 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
528 // backpropagated by the TPC tracker. Each seed is first propagated
529 // to the TRD, and then its prolongation is searched in the TRD.
530 // If sufficiently long continuation of the track is found in the TRD
531 // the track is updated, otherwise it's stored as originaly defined
532 // by the TPC tracker.
536 Float_t foundMin = 20;
537 Int_t n = event->GetNumberOfTracks();
540 Float_t *quality =new Float_t[n];
541 Int_t *index =new Int_t[n];
542 for (Int_t i=0; i<n; i++) {
543 AliESDtrack* seed=event->GetTrack(i);
544 Double_t covariance[15];
545 seed->GetExternalCovariance(covariance);
546 quality[i] = covariance[0]+covariance[2];
548 TMath::Sort(n,quality,index,kFALSE);
550 for (Int_t i=0; i<n; i++) {
551 // AliESDtrack* seed=event->GetTrack(i);
552 AliESDtrack* seed=event->GetTrack(index[i]);
554 ULong_t status=seed->GetStatus();
555 if ( (status & AliESDtrack::kTPCout ) == 0 ) continue;
556 if ( (status & AliESDtrack::kTRDout) != 0 ) continue;
558 Int_t lbl = seed->GetLabel();
559 AliTRDtrack *track = new AliTRDtrack(*seed);
560 track->SetSeedLabel(lbl);
561 seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup); //make backup
563 Float_t p4 = track->GetC();
565 Int_t expectedClr = FollowBackProlongation(*track);
566 if (TMath::Abs(track->GetC()-p4)/TMath::Abs(p4)<0.2 || TMath::Abs(track->GetPt())>0.8 ) {
568 //make backup for back propagation
570 Int_t foundClr = track->GetNumberOfClusters();
571 if (foundClr >= foundMin) {
573 CookdEdxTimBin(*track);
574 CookLabel(track, 1-fgkLabelFraction);
575 if (track->GetBackupTrack()) UseClusters(track->GetBackupTrack());
576 if(track->GetChi2()/track->GetNumberOfClusters()<4) { // sign only gold tracks
577 if (seed->GetKinkIndex(0)==0&&TMath::Abs(track->GetPt())<1.5 ) UseClusters(track);
579 Bool_t isGold = kFALSE;
581 if (track->GetChi2()/track->GetNumberOfClusters()<5) { //full gold track
582 // seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
583 if (track->GetBackupTrack()) seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
586 if (!isGold && track->GetNCross()==0&&track->GetChi2()/track->GetNumberOfClusters()<7){ //almost gold track
587 // seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
588 if (track->GetBackupTrack()) seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
591 if (!isGold && track->GetBackupTrack()){
592 if (track->GetBackupTrack()->GetNumberOfClusters()>foundMin&&
593 (track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1))<7){
594 seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
598 if (track->StatusForTOF()>0 &&track->fNCross==0 && Float_t(track->fN)/Float_t(track->fNExpected)>0.4){
599 //seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
603 // Debug part of tracking
604 TTreeSRedirector& cstream = *fDebugStreamer;
605 Int_t eventNr = event->GetEventNumber();
606 if (track->GetBackupTrack()){
608 "EventNr="<<eventNr<<
611 "trdback.="<<track->GetBackupTrack()<<
615 "EventNr="<<eventNr<<
622 //Propagation to the TOF (I.Belikov)
623 if (track->GetStop()==kFALSE){
626 Double_t c2=track->GetC()*xtof - track->GetEta();
627 if (TMath::Abs(c2)>=0.99) {
631 Double_t xTOF0 = 370. ;
632 PropagateToX(*track,xTOF0,fgkMaxStep);
634 //energy losses taken to the account - check one more time
635 c2=track->GetC()*xtof - track->GetEta();
636 if (TMath::Abs(c2)>=0.99) {
642 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
643 Double_t y=track->GetYat(xtof);
645 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
649 } else if (y <-ymax) {
650 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
656 if (track->PropagateTo(xtof)) {
657 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
658 for (Int_t i=0;i<kNPlane;i++) {
659 seed->SetTRDsignals(track->GetPIDsignals(i),i);
660 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
662 // seed->SetTRDtrack(new AliTRDtrack(*track));
663 if (track->GetNumberOfClusters()>foundMin) found++;
666 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
667 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
668 //seed->SetStatus(AliESDtrack::kTRDStop);
669 for (Int_t i=0;i<kNPlane;i++) {
670 seed->SetTRDsignals(track->GetPIDsignals(i),i);
671 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
673 //seed->SetTRDtrack(new AliTRDtrack(*track));
677 seed->SetTRDQuality(track->StatusForTOF());
678 seed->SetTRDBudget(track->fBudget[0]);
682 //End of propagation to the TOF
683 //if (foundClr>foundMin)
684 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
689 cerr<<"Number of seeds: "<<fNseeds<<endl;
690 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
692 if (AliTRDReconstructor::SeedingOn()) MakeSeedsMI(3,5,event); //new seeding
694 fSeeds->Clear(); fNseeds=0;
702 //_____________________________________________________________________________
703 Int_t AliTRDtracker::RefitInward(AliESD* event)
706 // Refits tracks within the TRD. The ESD event is expected to contain seeds
707 // at the outer part of the TRD.
708 // The tracks are propagated to the innermost time bin
709 // of the TRD and the ESD event is updated
710 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
713 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
714 Float_t foundMin = fgkMinClustersInTrack * timeBins;
717 // Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
720 Int_t n = event->GetNumberOfTracks();
721 for (Int_t i=0; i<n; i++) {
722 AliESDtrack* seed=event->GetTrack(i);
723 new(&seed2) AliTRDtrack(*seed);
724 if (seed2.GetX()<270){
725 seed->UpdateTrackParams(&seed2, AliESDtrack::kTRDbackup); // backup TPC track - only update
729 ULong_t status=seed->GetStatus();
730 if ( (status & AliESDtrack::kTRDout ) == 0 ) {
733 if ( (status & AliESDtrack::kTRDin) != 0 ) {
737 // if (1/seed2.Get1Pt()>1.5&& seed2.GetX()>260.) {
738 // Double_t oldx = seed2.GetX();
739 // seed2.PropagateTo(500.);
740 // seed2.ResetCovariance(1.);
741 // seed2.PropagateTo(oldx);
744 // seed2.ResetCovariance(5.);
747 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
748 Int_t * indexes2 = seed2.GetIndexes();
749 for (Int_t i=0;i<kNPlane;i++) {
750 pt->SetPIDsignals(seed2.GetPIDsignals(i),i);
751 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
754 Int_t * indexes3 = pt->GetBackupIndexes();
755 for (Int_t i=0;i<200;i++) {
756 if (indexes2[i]==0) break;
757 indexes3[i] = indexes2[i];
759 //AliTRDtrack *pt = seed2;
761 FollowProlongation(t);
762 if (t.GetNumberOfClusters() >= foundMin) {
764 //CookLabel(pt, 1-fgkLabelFraction);
769 // cout<<found<<'\r';
771 if(PropagateToX(t,xTPC,fgkMaxStep)) {
772 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
773 for (Int_t i=0;i<kNPlane;i++) {
774 seed->SetTRDsignals(pt->GetPIDsignals(i),i);
775 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
778 //if not prolongation to TPC - propagate without update
779 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
780 seed2->ResetCovariance(5.);
781 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
783 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
784 //pt2->CookdEdx(0.,1.);
785 pt2->CookdEdx( ); // Modification by PS
786 CookdEdxTimBin(*pt2);
787 seed->UpdateTrackParams(pt2, AliESDtrack::kTRDrefit);
788 for (Int_t i=0;i<kNPlane;i++) {
789 seed->SetTRDsignals(pt2->GetPIDsignals(i),i);
790 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
798 cout<<"Number of loaded seeds: "<<nseed<<endl;
799 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
809 //---------------------------------------------------------------------------
810 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t)
812 // Starting from current position on track=t this function tries
813 // to extrapolate the track up to timeBin=0 and to confirm prolongation
814 // if a close cluster is found. Returns the number of clusters
815 // expected to be found in sensitive layers
816 // GeoManager used to estimate mean density
818 Int_t lastplane = GetLastPlane(&t);
819 Double_t radLength = 0.0;
821 Int_t expectedNumberOfClusters = 0;
825 for (Int_t iplane = lastplane; iplane>=0; iplane--){
827 Int_t row0 = GetGlobalTimeBin(0, iplane,GetTimeBinsPerPlane()-1);
828 Int_t rowlast = GetGlobalTimeBin(0, iplane,0);
830 // propagate track close to the plane if neccessary
832 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
833 if (currentx < -fgkMaxStep +t.GetX()){
834 //propagate closer to chamber - safety space fgkMaxStep
835 if (!PropagateToX(t, currentx+fgkMaxStep, fgkMaxStep)) break;
837 if (!AdjustSector(&t)) break;
839 // get material budget
841 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
842 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
843 // end global position
844 x = fTrSec[0]->GetLayer(row0)->GetX();
845 if (!t.GetProlongation(x,y,z)) break;
846 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
847 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
849 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
851 radLength = param[1]; // get mean propagation parameters
853 // propagate nad update
855 sector = t.GetSector();
856 // for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
857 for (Int_t itime=0 ;itime<GetTimeBinsPerPlane();itime++) {
858 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
859 expectedNumberOfClusters++;
861 if (t.fX>345) t.fNExpectedLast++;
862 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(ilayer));
865 Double_t maxChi2=fgkMaxChi2;
868 AliTRDcluster * cl0 = timeBin[0];
869 if (!cl0) continue; // no clusters in given time bin
870 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
871 if (plane>lastplane) continue;
872 Int_t timebin = cl0->GetLocalTimeBin();
873 AliTRDcluster * cl2= GetCluster(&t,plane, timebin,index);
877 Double_t h01 = GetTiltFactor(cl);
878 maxChi2=t.GetPredictedChi2(cl,h01);
881 // if (cl->GetNPads()<5)
882 Double_t dxsample = timeBin.GetdX();
883 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
884 Double_t h01 = GetTiltFactor(cl);
885 Int_t det = cl->GetDetector();
886 Int_t plane = fGeom->GetPlane(det);
889 t.fChi2Last+=maxChi2;
891 Double_t xcluster = cl->GetX();
892 t.PropagateTo(xcluster,radLength,rho);
893 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
899 return expectedNumberOfClusters;
906 //___________________________________________________________________
907 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
910 // Starting from current radial position of track <t> this function
911 // extrapolates the track up to outer timebin and in the sensitive
912 // layers confirms prolongation if a close cluster is found.
913 // Returns the number of clusters expected to be found in sensitive layers
914 // Use GEO manager for material Description
917 Int_t clusters[1000];
918 for (Int_t i=0;i<1000;i++) clusters[i]=-1;
919 Double_t radLength = 0.0;
921 Int_t expectedNumberOfClusters = 0;
923 AliTRDtracklet tracklet;
926 for (Int_t iplane = 0; iplane<kNPlane; iplane++){
927 Int_t row0 = GetGlobalTimeBin(0, iplane,GetTimeBinsPerPlane()-1);
928 Int_t rowlast = GetGlobalTimeBin(0, iplane,0);
930 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
931 if (currentx<t.GetX()) continue;
933 // propagate closer to chamber if neccessary
935 if (currentx > fgkMaxStep +t.GetX()){
936 if (!PropagateToX(t, currentx-fgkMaxStep, fgkMaxStep)) break;
938 if (!AdjustSector(&t)) break;
939 if (TMath::Abs(t.GetSnp())>fgkMaxSnp) break;
941 // get material budget inside of chamber
943 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
944 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
945 // end global position
946 x = fTrSec[0]->GetLayer(rowlast)->GetX();
947 if (!t.GetProlongation(x,y,z)) break;
948 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
949 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
951 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
953 radLength = param[1]; // get mean propagation parameters
957 sector = t.GetSector();
958 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
959 if (tracklet.GetN()<GetTimeBinsPerPlane()/3) continue;
961 // Propagate and update track
963 for (Int_t itime= GetTimeBinsPerPlane()-1;itime>=0;itime--) {
964 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
965 expectedNumberOfClusters++;
967 if (t.fX>345) t.fNExpectedLast++;
968 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(ilayer));
971 Double_t maxChi2=fgkMaxChi2;
975 if (clusters[ilayer]>0) {
976 index = clusters[ilayer];
977 cl = (AliTRDcluster*)GetCluster(index);
978 Double_t h01 = GetTiltFactor(cl);
979 maxChi2=t.GetPredictedChi2(cl,h01);
983 // if (cl->GetNPads()<5)
984 Double_t dxsample = timeBin.GetdX();
985 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
986 Double_t h01 = GetTiltFactor(cl);
987 Int_t det = cl->GetDetector();
988 Int_t plane = fGeom->GetPlane(det);
991 t.fChi2Last+=maxChi2;
993 Double_t xcluster = cl->GetX();
994 t.PropagateTo(xcluster,radLength,rho);
995 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
996 if(!t.Update(cl,maxChi2,index,h01)) {
1000 // reset material budget if 2 consecutive gold
1002 if (t.fTracklets[plane].GetN()+t.fTracklets[plane-1].GetN()>20){
1008 ratio0 = ncl/Float_t(fTimeBinsPerPlane);
1009 Float_t ratio1 = Float_t(t.fN+1)/Float_t(t.fNExpected+1.);
1010 if (tracklet.GetChi2()<18.&&ratio0>0.8 && ratio1>0.6 && ratio0+ratio1>1.5 && t.GetNCross()==0 && TMath::Abs(t.GetSnp())<0.85&&t.fN>20){
1011 t.MakeBackupTrack(); // make backup of the track until is gold
1016 return expectedNumberOfClusters;
1021 Int_t AliTRDtracker::PropagateToX(AliTRDtrack& t, Double_t xToGo, Double_t maxStep)
1023 // Starting from current radial position of track <t> this function
1024 // extrapolates the track up to radial position <xToGo>.
1025 // Returns 1 if track reaches the plane, and 0 otherwise
1026 const Double_t kEpsilon = 0.00001;
1027 // Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1028 Double_t xpos = t.GetX();
1029 Double_t dir = (xpos<xToGo) ? 1.:-1.;
1031 while ( (xToGo-xpos)*dir > kEpsilon){
1032 Double_t step = dir*TMath::Min(TMath::Abs(xToGo-xpos), maxStep);
1034 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
1035 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
1038 if (!t.GetProlongation(x,y,z)) return 0; // no prolongation
1040 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
1041 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
1044 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1045 if (!t.PropagateTo(x,param[1],param[0])) return 0;
1055 //_____________________________________________________________________________
1056 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1058 // Fills clusters into TRD tracking_sectors
1059 // Note that the numbering scheme for the TRD tracking_sectors
1060 // differs from that of TRD sectors
1061 cout<<"\n Read Sectors clusters"<<endl;
1062 if (ReadClusters(fClusters,cTree)) {
1063 Error("LoadClusters","Problem with reading the clusters !");
1066 Int_t ncl=fClusters->GetEntriesFast();
1068 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1071 for (Int_t ichamber=0;ichamber<5;ichamber++)
1072 for (Int_t isector=0;isector<18;isector++){
1073 fHoles[ichamber][isector]=kTRUE;
1078 // printf("\r %d left ",ncl);
1079 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
1080 Int_t detector=c->GetDetector();
1081 Int_t localTimeBin=c->GetLocalTimeBin();
1082 Int_t sector=fGeom->GetSector(detector);
1083 Int_t plane=fGeom->GetPlane(detector);
1085 Int_t trackingSector = CookSectorIndex(sector);
1086 if (c->GetLabel(0)>0){
1087 Int_t chamber = fGeom->GetChamber(detector);
1088 fHoles[chamber][trackingSector]=kFALSE;
1091 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1092 if(gtb < 0) continue;
1093 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1097 // apply pos correction
1099 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1104 //_____________________________________________________________________________
1105 void AliTRDtracker::UnloadClusters()
1108 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1113 nentr = fClusters->GetEntriesFast();
1114 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1117 nentr = fSeeds->GetEntriesFast();
1118 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1120 nentr = fTracks->GetEntriesFast();
1121 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1123 Int_t nsec = AliTRDgeometry::kNsect;
1125 for (i = 0; i < nsec; i++) {
1126 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1127 fTrSec[i]->GetLayer(pl)->Clear();
1133 //__________________________________________________________________________
1134 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD * esd)
1137 // Creates seeds using clusters between position inner plane and outer plane
1139 const Double_t kMaxTheta = 1;
1140 const Double_t kMaxPhi = 2.0;
1142 const Double_t kRoad0y = 6; // road for middle cluster
1143 const Double_t kRoad0z = 8.5; // road for middle cluster
1145 const Double_t kRoad1y = 2; // road in y for seeded cluster
1146 const Double_t kRoad1z = 20; // road in z for seeded cluster
1148 const Double_t kRoad2y = 3; // road in y for extrapolated cluster
1149 const Double_t kRoad2z = 20; // road in z for extrapolated cluster
1150 const Int_t kMaxSeed = 3000;
1151 Int_t maxSec=AliTRDgeometry::kNsect;
1154 // linear fitters in planes
1155 TLinearFitter fitterTC(2,"hyp2"); // fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1156 TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed
1157 fitterTC.StoreData(kTRUE);
1158 fitterT2.StoreData(kTRUE);
1159 AliRieman rieman(1000); // rieman fitter
1160 AliRieman rieman2(1000); // rieman fitter
1162 // find the maximal and minimal layer for the planes
1165 AliTRDpropagationLayer* reflayers[6];
1166 for (Int_t i=0;i<6;i++){layers[i][0]=10000; layers[i][1]=0;}
1167 for (Int_t ns=0;ns<maxSec;ns++){
1168 for (Int_t ilayer=0;ilayer<fTrSec[ns]->GetNumberOfLayers();ilayer++){
1169 AliTRDpropagationLayer& layer=*(fTrSec[ns]->GetLayer(ilayer));
1170 if (layer==0) continue;
1171 Int_t det = layer[0]->GetDetector();
1172 Int_t plane = fGeom->GetPlane(det);
1173 if (ilayer<layers[plane][0]) layers[plane][0] = ilayer;
1174 if (ilayer>layers[plane][1]) layers[plane][1] = ilayer;
1178 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1179 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1180 Double_t hL[6]; // tilting angle
1181 Double_t xcl[6]; // x - position of reference cluster
1182 Double_t ycl[6]; // y - position of reference cluster
1183 Double_t zcl[6]; // z - position of reference cluster
1184 AliTRDcluster *cl[6]={0,0,0,0,0,0}; // seeding clusters
1185 Float_t padlength[6]={10,10,10,10,10,10}; //current pad-length
1186 Double_t chi2R =0, chi2Z=0;
1187 Double_t chi2RF =0, chi2ZF=0;
1189 Int_t nclusters; // total number of clusters
1190 for (Int_t i=0;i<6;i++) {hL[i]=h01; if (i%2==1) hL[i]*=-1.;}
1194 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1195 AliTRDseed *seed[kMaxSeed];
1196 for (Int_t iseed=0;iseed<kMaxSeed;iseed++) seed[iseed]= &pseed[iseed*6];
1197 AliTRDseed *cseed = seed[0];
1199 Double_t seedquality[kMaxSeed];
1200 Double_t seedquality2[kMaxSeed];
1201 Double_t seedparams[kMaxSeed][7];
1202 Int_t seedlayer[kMaxSeed];
1203 Int_t registered =0;
1204 Int_t sort[kMaxSeed];
1208 for (Int_t ns = 0; ns<maxSec; ns++){ //loop over sectors
1209 //for (Int_t ns = 0; ns<5; ns++){ //loop over sectors
1210 registered = 0; // reset registerd seed counter
1211 cseed = seed[registered];
1213 for (Int_t sLayer=2; sLayer>=0;sLayer--){
1214 //for (Int_t dseed=5;dseed<15; dseed+=3){ //loop over central seeding time bins
1216 Int_t dseed = 5+Int_t(iter)*3;
1217 // Initialize seeding layers
1218 for (Int_t ilayer=0;ilayer<6;ilayer++){
1219 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1220 xcl[ilayer] = reflayers[ilayer]->GetX();
1223 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2])*0.5;
1224 AliTRDpropagationLayer& layer0=*reflayers[sLayer+0];
1225 AliTRDpropagationLayer& layer1=*reflayers[sLayer+1];
1226 AliTRDpropagationLayer& layer2=*reflayers[sLayer+2];
1227 AliTRDpropagationLayer& layer3=*reflayers[sLayer+3];
1229 Int_t maxn3 = layer3;
1230 for (Int_t icl3=0;icl3<maxn3;icl3++){
1231 AliTRDcluster *cl3 = layer3[icl3];
1233 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2()*12.);
1234 ycl[sLayer+3] = cl3->GetY();
1235 zcl[sLayer+3] = cl3->GetZ();
1236 Float_t yymin0 = ycl[sLayer+3] - 1- kMaxPhi *(xcl[sLayer+3]-xcl[sLayer+0]);
1237 Float_t yymax0 = ycl[sLayer+3] + 1+ kMaxPhi *(xcl[sLayer+3]-xcl[sLayer+0]);
1238 Int_t maxn0 = layer0; //
1239 for (Int_t icl0=layer0.Find(yymin0);icl0<maxn0;icl0++){
1240 AliTRDcluster *cl0 = layer0[icl0];
1242 if (cl3->IsUsed()&&cl0->IsUsed()) continue;
1243 ycl[sLayer+0] = cl0->GetY();
1244 zcl[sLayer+0] = cl0->GetZ();
1245 if ( ycl[sLayer+0]>yymax0) break;
1246 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]);
1247 if (TMath::Abs(tanphi)>kMaxPhi) continue;
1248 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]);
1249 if (TMath::Abs(tantheta)>kMaxTheta) continue;
1250 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2()*12.);
1252 // expected position in 1 layer
1253 Double_t y1exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+1]-xcl[sLayer+0]);
1254 Double_t z1exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+1]-xcl[sLayer+0]);
1255 Float_t yymin1 = y1exp - kRoad0y-tanphi;
1256 Float_t yymax1 = y1exp + kRoad0y+tanphi;
1257 Int_t maxn1 = layer1; //
1259 for (Int_t icl1=layer1.Find(yymin1);icl1<maxn1;icl1++){
1260 AliTRDcluster *cl1 = layer1[icl1];
1263 if (cl3->IsUsed()) nusedCl++;
1264 if (cl0->IsUsed()) nusedCl++;
1265 if (cl1->IsUsed()) nusedCl++;
1266 if (nusedCl>1) continue;
1267 ycl[sLayer+1] = cl1->GetY();
1268 zcl[sLayer+1] = cl1->GetZ();
1269 if ( ycl[sLayer+1]>yymax1) break;
1270 if (TMath::Abs(ycl[sLayer+1]-y1exp)>kRoad0y+tanphi) continue;
1271 if (TMath::Abs(zcl[sLayer+1]-z1exp)>kRoad0z) continue;
1272 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2()*12.);
1274 Double_t y2exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+2]-xcl[sLayer+0])+(ycl[sLayer+1]-y1exp);
1275 Double_t z2exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+2]-xcl[sLayer+0]);
1276 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y, kRoad1z);
1277 if (index2<=0) continue;
1278 AliTRDcluster *cl2 = (AliTRDcluster*)GetCluster(index2);
1279 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2()*12.);
1280 ycl[sLayer+2] = cl2->GetY();
1281 zcl[sLayer+2] = cl2->GetZ();
1282 if (TMath::Abs(cl2->GetZ()-z2exp)>kRoad0z) continue;
1285 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1286 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1287 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1288 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1292 for (Int_t iLayer=0;iLayer<6;iLayer++){
1293 cseed[iLayer].Reset();
1295 chi2Z =0.; chi2R=0.;
1296 for (Int_t iLayer=0;iLayer<4;iLayer++){
1297 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1298 chi2Z += (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer])*
1299 (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer]);
1300 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1301 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1302 chi2R += (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer])*
1303 (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer]);
1304 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1306 if (TMath::Sqrt(chi2R)>1./iter) continue;
1307 if (TMath::Sqrt(chi2Z)>7./iter) continue;
1311 Float_t minmax[2]={-100,100};
1312 for (Int_t iLayer=0;iLayer<4;iLayer++){
1313 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer]*0.5+1 -cseed[sLayer+iLayer].fZref[0];
1314 if (max<minmax[1]) minmax[1]=max;
1315 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer]*0.5-1 -cseed[sLayer+iLayer].fZref[0];
1316 if (min>minmax[0]) minmax[0]=min;
1318 Bool_t isFake = kFALSE;
1319 if (cl0->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1320 if (cl1->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1321 if (cl2->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1322 if ((!isFake) || (icl3%10)==0 ){ //debugging print
1323 TTreeSRedirector& cstream = *fDebugStreamer;
1331 "X0="<<xcl[sLayer+0]<<
1332 "X1="<<xcl[sLayer+1]<<
1333 "X2="<<xcl[sLayer+2]<<
1334 "X3="<<xcl[sLayer+3]<<
1339 "Seed0.="<<&cseed[sLayer+0]<<
1340 "Seed1.="<<&cseed[sLayer+1]<<
1341 "Seed2.="<<&cseed[sLayer+2]<<
1342 "Seed3.="<<&cseed[sLayer+3]<<
1343 "Zmin="<<minmax[0]<<
1344 "Zmax="<<minmax[1]<<
1348 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1349 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1350 //<<<<<<<<<<<<<<<<<< FIT SEEDING PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1351 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1357 for (Int_t jLayer=0;jLayer<4;jLayer++){
1358 cseed[sLayer+jLayer].fTilt = hL[sLayer+jLayer];
1359 cseed[sLayer+jLayer].fPadLength = padlength[sLayer+jLayer];
1360 cseed[sLayer+jLayer].fX0 = xcl[sLayer+jLayer];
1361 for (Int_t iter=0; iter<2; iter++){
1363 // in iteration 0 we try only one pad-row
1364 // if quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1366 AliTRDseed tseed = cseed[sLayer+jLayer];
1367 Float_t roadz = padlength[sLayer+jLayer]*0.5;
1368 if (iter>0) roadz = padlength[sLayer+jLayer];
1370 Float_t quality =10000;
1371 for (Int_t iTime=2;iTime<20;iTime++){
1372 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1373 Double_t dxlayer= layer.GetX()-xcl[sLayer+jLayer];
1374 Double_t zexp = cl[sLayer+jLayer]->GetZ() ;
1376 // try 2 pad-rows in second iteration
1377 zexp = tseed.fZref[0]+ tseed.fZref[1]*dxlayer;
1378 if (zexp>cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()+padlength[sLayer+jLayer]*0.5;
1379 if (zexp<cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()-padlength[sLayer+jLayer]*0.5;
1382 Double_t yexp = tseed.fYref[0]+
1383 tseed.fYref[1]*dxlayer;
1384 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz);
1385 if (index<=0) continue;
1386 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1388 tseed.fIndexes[iTime] = index;
1389 tseed.fClusters[iTime] = cl; // register cluster
1390 tseed.fX[iTime] = dxlayer; // register cluster
1391 tseed.fY[iTime] = cl->GetY(); // register cluster
1392 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1395 //count the number of clusters and distortions into quality
1396 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1397 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1398 TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+
1399 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1400 if (iter==0 && tseed.IsOK()) {
1401 cseed[sLayer+jLayer] = tseed;
1403 if (tquality<5) break;
1405 if (tseed.IsOK() && tquality<quality)
1406 cseed[sLayer+jLayer] = tseed;
1408 if (!cseed[sLayer+jLayer].IsOK()){
1412 cseed[sLayer+jLayer].CookLabels();
1413 cseed[sLayer+jLayer].UpdateUsed();
1414 nusedCl+= cseed[sLayer+jLayer].fNUsed;
1421 if (!isOK) continue;
1423 for (Int_t iLayer=0;iLayer<4;iLayer++){
1424 if (cseed[sLayer+iLayer].IsOK()){
1425 nclusters+=cseed[sLayer+iLayer].fN2;
1431 for (Int_t iLayer=0;iLayer<4;iLayer++){
1432 rieman.AddPoint(xcl[sLayer+iLayer],cseed[sLayer+iLayer].fYfitR[0],
1433 cseed[sLayer+iLayer].fZProb,1,10);
1439 for (Int_t iLayer=0;iLayer<4;iLayer++){
1440 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1441 chi2R += (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0])*
1442 (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0]);
1443 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1444 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1445 chi2Z += (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz)*
1446 (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz);
1447 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1449 Double_t curv = rieman.GetC();
1454 TMath::Abs(cseed[sLayer+0].fYfitR[1]- cseed[sLayer+0].fYref[1])+
1455 TMath::Abs(cseed[sLayer+1].fYfitR[1]- cseed[sLayer+1].fYref[1])+
1456 TMath::Abs(cseed[sLayer+2].fYfitR[1]- cseed[sLayer+2].fYref[1])+
1457 TMath::Abs(cseed[sLayer+3].fYfitR[1]- cseed[sLayer+3].fYref[1]);
1458 Double_t likea = TMath::Exp(-sumda*10.6);
1459 Double_t likechi2 = 0.0000000001;
1460 if (chi2R<0.5) likechi2+=TMath::Exp(-TMath::Sqrt(chi2R)*7.73);
1461 Double_t likechi2z = TMath::Exp(-chi2Z*0.088)/TMath::Exp(-chi2Z*0.019);
1462 Double_t likeN = TMath::Exp(-(72-nclusters)*0.19);
1463 Double_t like = likea*likechi2*likechi2z*likeN;
1465 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fYref[1]-130*curv)*1.9);
1466 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fZref[1]-
1467 cseed[sLayer+0].fZref[0]/xcl[sLayer+0])*5.9);
1468 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1470 seedquality[registered] = like;
1471 seedlayer[registered] = sLayer;
1472 if (TMath::Log(0.000000000000001+like)<-15) continue;
1473 AliTRDseed seedb[6];
1474 for (Int_t iLayer=0;iLayer<6;iLayer++){
1475 seedb[iLayer] = cseed[iLayer];
1478 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1479 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1480 //<<<<<<<<<<<<<<< FULL TRACK FIT PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1481 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1487 // add new layers - avoid long extrapolation
1489 Int_t tLayer[2]={0,0};
1490 if (sLayer==2) {tLayer[0]=1; tLayer[1]=0;}
1491 if (sLayer==1) {tLayer[0]=5; tLayer[1]=0;}
1492 if (sLayer==0) {tLayer[0]=4; tLayer[1]=5;}
1494 for (Int_t iLayer=0;iLayer<2;iLayer++){
1495 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1496 cseed[jLayer].Reset();
1497 cseed[jLayer].fTilt = hL[jLayer];
1498 cseed[jLayer].fPadLength = padlength[jLayer];
1499 cseed[jLayer].fX0 = xcl[jLayer];
1500 // get pad length and rough cluster
1501 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].fYref[0],
1502 cseed[jLayer].fZref[0],kRoad2y,kRoad2z);
1503 if (indexdummy<=0) continue;
1504 AliTRDcluster *cldummy = (AliTRDcluster*)GetCluster(indexdummy);
1505 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2()*12.);
1507 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1509 for (Int_t iLayer=0;iLayer<2;iLayer++){
1510 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1511 if ( (jLayer==0) && !(cseed[1].IsOK())) continue; // break not allowed
1512 if ( (jLayer==5) && !(cseed[4].IsOK())) continue; // break not allowed
1513 Float_t zexp = cseed[jLayer].fZref[0];
1514 Double_t zroad = padlength[jLayer]*0.5+1.;
1517 for (Int_t iter=0;iter<2;iter++){
1518 AliTRDseed tseed = cseed[jLayer];
1519 Float_t quality = 10000;
1520 for (Int_t iTime=2;iTime<20;iTime++){
1521 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
1522 Double_t dxlayer = layer.GetX()-xcl[jLayer];
1523 Double_t yexp = tseed.fYref[0]+tseed.fYref[1]*dxlayer;
1524 Float_t yroad = kRoad1y;
1525 Int_t index = layer.FindNearestCluster(yexp,zexp, yroad, zroad);
1526 if (index<=0) continue;
1527 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1529 tseed.fIndexes[iTime] = index;
1530 tseed.fClusters[iTime] = cl; // register cluster
1531 tseed.fX[iTime] = dxlayer; // register cluster
1532 tseed.fY[iTime] = cl->GetY(); // register cluster
1533 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1537 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1538 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1539 TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+
1540 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1542 if (tquality<quality){
1543 cseed[jLayer]=tseed;
1549 if ( cseed[jLayer].IsOK()){
1550 cseed[jLayer].CookLabels();
1551 cseed[jLayer].UpdateUsed();
1552 nusedf+= cseed[jLayer].fNUsed;
1553 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1559 AliTRDseed bseed[6];
1560 for (Int_t jLayer=0;jLayer<6;jLayer++){
1561 bseed[jLayer] = cseed[jLayer];
1563 Float_t lastquality = 10000;
1564 Float_t lastchi2 = 10000;
1565 Float_t chi2 = 1000;
1568 for (Int_t iter =0; iter<4;iter++){
1570 // sort tracklets according "quality", try to "improve" 4 worst
1572 Float_t sumquality = 0;
1573 Float_t squality[6];
1574 Int_t sortindexes[6];
1575 for (Int_t jLayer=0;jLayer<6;jLayer++){
1576 if (bseed[jLayer].IsOK()){
1577 AliTRDseed &tseed = bseed[jLayer];
1578 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1579 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1580 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1581 TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+
1582 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1583 squality[jLayer] = tquality;
1585 else squality[jLayer]=-1;
1586 sumquality +=squality[jLayer];
1589 if (sumquality>=lastquality || chi2>lastchi2) break;
1590 lastquality = sumquality;
1593 for (Int_t jLayer=0;jLayer<6;jLayer++){
1594 cseed[jLayer] = bseed[jLayer];
1597 TMath::Sort(6,squality,sortindexes,kFALSE);
1600 for (Int_t jLayer=5;jLayer>1;jLayer--){
1601 Int_t bLayer = sortindexes[jLayer];
1602 AliTRDseed tseed = bseed[bLayer];
1603 for (Int_t iTime=2;iTime<20;iTime++){
1604 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
1605 Double_t dxlayer= layer.GetX()-xcl[bLayer];
1607 Double_t zexp = tseed.fZref[0];
1608 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1610 Float_t roadz = padlength[bLayer]+1;
1611 if (TMath::Abs(tseed.fZProb-zexp)> padlength[bLayer]*0.5) {roadz = padlength[bLayer]*0.5;}
1612 if (tseed.fZfit[1]*tseed.fZref[1]<0) {roadz = padlength[bLayer]*0.5;}
1613 if (TMath::Abs(tseed.fZProb-zexp)<0.1*padlength[bLayer]) {
1614 zexp = tseed.fZProb;
1615 roadz = padlength[bLayer]*0.5;
1618 Double_t yexp = tseed.fYref[0]+
1619 tseed.fYref[1]*dxlayer-zcor;
1620 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz);
1621 if (index<=0) continue;
1622 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1624 tseed.fIndexes[iTime] = index;
1625 tseed.fClusters[iTime] = cl; // register cluster
1626 tseed.fX[iTime] = dxlayer; // register cluster
1627 tseed.fY[iTime] = cl->GetY(); // register cluster
1628 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1632 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1633 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1635 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1636 TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+
1637 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1639 if (tquality<squality[bLayer])
1640 bseed[bLayer] = tseed;
1643 chi2 = AliTRDseed::FitRiemanTilt(bseed, kTRUE);
1651 for (Int_t iLayer=0;iLayer<6;iLayer++) {
1652 if (TMath::Abs(cseed[iLayer].fYref[0]/cseed[iLayer].fX0)<0.15)
1654 if (cseed[iLayer].IsOK()){
1655 nclusters+=cseed[iLayer].fN2;
1659 if (nlayers<3) continue;
1661 for (Int_t iLayer=0;iLayer<6;iLayer++){
1662 if (cseed[iLayer].IsOK()) rieman.AddPoint(xcl[iLayer],cseed[iLayer].fYfitR[0],
1663 cseed[iLayer].fZProb,1,10);
1669 for (Int_t iLayer=0;iLayer<6;iLayer++){
1670 if (cseed[iLayer].IsOK()){
1671 cseed[iLayer].fYref[0] = rieman.GetYat(xcl[iLayer]);
1672 chi2RF += (cseed[iLayer].fYref[0]-cseed[iLayer].fYfitR[0])*
1673 (cseed[iLayer].fYref[0]-cseed[iLayer].fYfitR[0]);
1674 cseed[iLayer].fYref[1] = rieman.GetDYat(xcl[iLayer]);
1675 cseed[iLayer].fZref[0] = rieman.GetZat(xcl[iLayer]);
1676 chi2ZF += (cseed[iLayer].fZref[0]- cseed[iLayer].fMeanz)*
1677 (cseed[iLayer].fZref[0]- cseed[iLayer].fMeanz);
1678 cseed[iLayer].fZref[1] = rieman.GetDZat(xcl[iLayer]);
1681 chi2RF/=TMath::Max((nlayers-3.),1.);
1682 chi2ZF/=TMath::Max((nlayers-3.),1.);
1683 curv = rieman.GetC();
1687 Double_t xref2 = (xcl[2]+xcl[3])*0.5; // middle of the chamber
1688 Double_t dzmf = rieman.GetDZat(xref2);
1689 Double_t zmf = rieman.GetZat(xref2);
1694 fitterTC.ClearPoints();
1695 fitterT2.ClearPoints();
1697 for (Int_t iLayer=0; iLayer<6;iLayer++){
1698 if (!cseed[iLayer].IsOK()) continue;
1699 for (Int_t itime=0;itime<25;itime++){
1700 if (!cseed[iLayer].fUsable[itime]) continue;
1701 Double_t x = cseed[iLayer].fX[itime]+cseed[iLayer].fX0-xref2; // x relative to the midle chamber
1702 Double_t y = cseed[iLayer].fY[itime];
1703 Double_t z = cseed[iLayer].fZ[itime];
1704 // ExB correction to the correction
1708 Double_t x2 = cseed[iLayer].fX[itime]+cseed[iLayer].fX0; // global x
1710 Double_t t = 1./(x2*x2+y*y);
1712 uvt[0] = 2.*x2*uvt[1]; // u
1714 uvt[2] = 2.0*hL[iLayer]*uvt[1];
1715 uvt[3] = 2.0*hL[iLayer]*x*uvt[1];
1716 uvt[4] = 2.0*(y+hL[iLayer]*z)*uvt[1];
1718 Double_t error = 2*0.2*uvt[1];
1719 fitterT2.AddPoint(uvt,uvt[4],error);
1721 // constrained rieman
1723 z =cseed[iLayer].fZ[itime];
1724 uvt[0] = 2.*x2*t; // u
1725 uvt[1] = 2*hL[iLayer]*x2*uvt[1];
1726 uvt[2] = 2*(y+hL[iLayer]*(z-GetZ()))*t;
1727 fitterTC.AddPoint(uvt,uvt[2],error);
1729 rieman2.AddPoint(x2,y,z,1,10);
1736 Double_t rpolz0 = fitterT2.GetParameter(3);
1737 Double_t rpolz1 = fitterT2.GetParameter(4);
1739 // linear fitter - not possible to make boundaries
1740 // non accept non possible z and dzdx combination
1742 Bool_t acceptablez =kTRUE;
1743 for (Int_t iLayer=0; iLayer<6;iLayer++){
1744 if (cseed[iLayer].IsOK()){
1745 Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2);
1746 if (TMath::Abs(cseed[iLayer].fZProb-zT2)>padlength[iLayer]*0.5+1)
1747 acceptablez = kFALSE;
1751 fitterT2.FixParameter(3,zmf);
1752 fitterT2.FixParameter(4,dzmf);
1754 fitterT2.ReleaseParameter(3);
1755 fitterT2.ReleaseParameter(4);
1756 rpolz0 = fitterT2.GetParameter(3);
1757 rpolz1 = fitterT2.GetParameter(4);
1760 Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT);
1761 Double_t chi2TC = fitterTC.GetChisquare()/Float_t(npointsT);
1763 Double_t polz1c = fitterTC.GetParameter(2);
1764 Double_t polz0c = polz1c*xref2;
1766 Double_t aC = fitterTC.GetParameter(0);
1767 Double_t bC = fitterTC.GetParameter(1);
1768 Double_t cC = aC/TMath::Sqrt(bC*bC+1.); // curvature
1770 Double_t aR = fitterT2.GetParameter(0);
1771 Double_t bR = fitterT2.GetParameter(1);
1772 Double_t dR = fitterT2.GetParameter(2);
1773 Double_t cR = 1+bR*bR-dR*aR;
1776 dca = -dR/(TMath::Sqrt(1+bR*bR-dR*aR)+TMath::Sqrt(1+bR*bR));
1777 cR = aR/TMath::Sqrt(cR);
1780 Double_t chi2ZT2=0, chi2ZTC=0;
1781 for (Int_t iLayer=0; iLayer<6;iLayer++){
1782 if (cseed[iLayer].IsOK()){
1783 Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2);
1784 Double_t zTC = polz0c+polz1c*(xcl[iLayer] - xref2);
1785 chi2ZT2 += TMath::Abs(cseed[iLayer].fMeanz-zT2);
1786 chi2ZTC += TMath::Abs(cseed[iLayer].fMeanz-zTC);
1789 chi2ZT2/=TMath::Max((nlayers-3.),1.);
1790 chi2ZTC/=TMath::Max((nlayers-3.),1.);
1794 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1796 for (Int_t iLayer=0;iLayer<6;iLayer++){
1797 if (cseed[iLayer].IsOK())
1798 sumdaf += TMath::Abs((cseed[iLayer].fYfit[1]-cseed[iLayer].fYref[1])/cseed[iLayer].fSigmaY2);
1800 sumdaf /= Float_t (nlayers-2.);
1802 // likelihoods for full track
1804 Double_t likezf = TMath::Exp(-chi2ZF*0.14);
1805 Double_t likechi2C = TMath::Exp(-chi2TC*0.677);
1806 Double_t likechi2TR = TMath::Exp(-chi2TR*0.78);
1807 Double_t likeaf = TMath::Exp(-sumdaf*3.23);
1808 seedquality2[registered] = likezf*likechi2TR*likeaf;
1809 // Bool_t isGold = kFALSE;
1811 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
1812 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
1813 // if (isGold &&nusedf<10){
1814 // for (Int_t jLayer=0;jLayer<6;jLayer++){
1815 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
1816 // seed[index][jLayer].UseClusters(); //sign gold
1823 if (!cseed[0].IsOK()){
1825 if (!cseed[1].IsOK()) index0 = 2;
1827 seedparams[registered][0] = cseed[index0].fX0;
1828 seedparams[registered][1] = cseed[index0].fYref[0];
1829 seedparams[registered][2] = cseed[index0].fZref[0];
1830 seedparams[registered][5] = cR;
1831 seedparams[registered][3] = cseed[index0].fX0*cR - TMath::Sin(TMath::ATan(cseed[0].fYref[1]));
1832 seedparams[registered][4] = cseed[index0].fZref[1]/
1833 TMath::Sqrt(1+cseed[index0].fYref[1]*cseed[index0].fYref[1]);
1834 seedparams[registered][6] = ns;
1837 Int_t labels[12], outlab[24];
1839 for (Int_t iLayer=0;iLayer<6;iLayer++){
1840 if (!cseed[iLayer].IsOK()) continue;
1841 if (cseed[iLayer].fLabels[0]>=0) {
1842 labels[nlab] = cseed[iLayer].fLabels[0];
1845 if (cseed[iLayer].fLabels[1]>=0) {
1846 labels[nlab] = cseed[iLayer].fLabels[1];
1850 Freq(nlab,labels,outlab,kFALSE);
1851 Int_t label = outlab[0];
1852 Int_t frequency = outlab[1];
1853 for (Int_t iLayer=0;iLayer<6;iLayer++){
1854 cseed[iLayer].fFreq = frequency;
1855 cseed[iLayer].fC = cR;
1856 cseed[iLayer].fCC = cC;
1857 cseed[iLayer].fChi2 = chi2TR;
1858 cseed[iLayer].fChi2Z = chi2ZF;
1861 if (1||(!isFake)){ //debugging print
1862 Float_t zvertex = GetZ();
1863 TTreeSRedirector& cstream = *fDebugStreamer;
1866 "Vertex="<<zvertex<<
1867 "Rieman2.="<<&rieman2<<
1868 "Rieman.="<<&rieman<<
1878 "Chi2RF="<<chi2RF<< //chi2 of trackletes on full track
1879 "Chi2ZF="<<chi2ZF<< //chi2 z on tracklets on full track
1880 "Chi2ZT2="<<chi2ZT2<< //chi2 z on tracklets on full track - rieman tilt
1881 "Chi2ZTC="<<chi2ZTC<< //chi2 z on tracklets on full track - rieman tilt const
1883 "Chi2TR="<<chi2TR<< //chi2 without vertex constrain
1884 "Chi2TC="<<chi2TC<< //chi2 with vertex constrain
1885 "C="<<curv<< // non constrained - no tilt correction
1886 "DR="<<dR<< // DR parameter - tilt correction
1887 "DCA="<<dca<< // DCA - tilt correction
1888 "CR="<<cR<< // non constrained curvature - tilt correction
1889 "CC="<<cC<< // constrained curvature
1895 "Nlayers="<<nlayers<<
1896 "NUsedS="<<nusedCl<<
1898 "Findable="<<findable<<
1900 "LikePrim="<<likePrim<<
1901 "Likechi2C="<<likechi2C<<
1902 "Likechi2TR="<<likechi2TR<<
1904 "LikeF="<<seedquality2[registered]<<
1911 "SB0.="<<&seedb[0]<<
1912 "SB1.="<<&seedb[1]<<
1913 "SB2.="<<&seedb[2]<<
1914 "SB3.="<<&seedb[3]<<
1915 "SB4.="<<&seedb[4]<<
1916 "SB5.="<<&seedb[5]<<
1918 "Freq="<<frequency<<
1922 if (registered<kMaxSeed-1) {
1924 cseed = seed[registered];
1926 }// end of loop over layer 1
1927 } // end of loop over layer 0
1928 } // end of loop over layer 3
1929 } // end of loop over seeding time bins
1933 TMath::Sort(registered,seedquality2,sort,kTRUE);
1934 Bool_t signedseed[kMaxSeed];
1935 for (Int_t i=0;i<registered;i++){
1936 signedseed[i]= kFALSE;
1938 for (Int_t iter=0; iter<5; iter++){
1939 for (Int_t iseed=0;iseed<registered;iseed++){
1940 Int_t index = sort[iseed];
1941 if (signedseed[index]) continue;
1942 Int_t labelsall[1000];
1945 Int_t sLayer = seedlayer[index];
1950 for (Int_t jLayer=0;jLayer<6;jLayer++){
1951 if (TMath::Abs(seed[index][jLayer].fYref[0]/xcl[jLayer])<0.15)
1953 if (seed[index][jLayer].IsOK()){
1954 seed[index][jLayer].UpdateUsed();
1955 ncl +=seed[index][jLayer].fN2;
1956 nused +=seed[index][jLayer].fNUsed;
1959 for (Int_t itime=0;itime<25;itime++){
1960 if (seed[index][jLayer].fUsable[itime]){
1962 for (Int_t ilab=0;ilab<3;ilab++){
1963 Int_t tindex = seed[index][jLayer].fClusters[itime]->GetLabel(ilab);
1965 labelsall[nlabelsall] = tindex;
1974 if (nused>30) continue;
1977 if (nlayers<6) continue;
1978 if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue; // gold
1982 if (nlayers<findable) continue;
1983 if (TMath::Log(0.000000001+seedquality2[index])<-4.) continue; //
1988 if (nlayers==findable || nlayers==6) continue;
1989 if (TMath::Log(0.000000001+seedquality2[index])<-6.) continue;
1993 if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue;
1997 if (TMath::Log(0.000000001+seedquality2[index])-nused/(nlayers-3.)<-15.) continue;
2000 signedseed[index] = kTRUE;
2002 Int_t labels[1000], outlab[1000];
2004 for (Int_t iLayer=0;iLayer<6;iLayer++){
2005 if (seed[index][iLayer].IsOK()){
2006 if (seed[index][iLayer].fLabels[0]>=0) {
2007 labels[nlab] = seed[index][iLayer].fLabels[0];
2010 if (seed[index][iLayer].fLabels[1]>=0) {
2011 labels[nlab] = seed[index][iLayer].fLabels[1];
2016 Freq(nlab,labels,outlab,kFALSE);
2017 Int_t label = outlab[0];
2018 Int_t frequency = outlab[1];
2019 Freq(nlabelsall,labelsall,outlab,kFALSE);
2020 Int_t label1 = outlab[0];
2021 Int_t label2 = outlab[2];
2022 Float_t fakeratio = (naccepted-outlab[1])/Float_t(naccepted);
2023 Float_t ratio = Float_t(nused)/Float_t(ncl);
2025 for (Int_t jLayer=0;jLayer<6;jLayer++){
2026 if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.2 )
2027 seed[index][jLayer].UseClusters(); //sign gold
2031 Int_t eventNr = esd->GetEventNumber();
2032 TTreeSRedirector& cstream = *fDebugStreamer;
2036 AliTRDtrack * track = RegisterSeed(seed[index],seedparams[index]);
2038 if (!track) track=&dummy;
2040 AliESDtrack esdtrack;
2041 esdtrack.UpdateTrackParams(track, AliESDtrack::kTRDout);
2042 esdtrack.SetLabel(label);
2043 esd->AddTrack(&esdtrack);
2044 TTreeSRedirector& cstream = *fDebugStreamer;
2046 "EventNr="<<eventNr<<
2047 "ESD.="<<&esdtrack<<
2049 "trdback.="<<track<<
2056 "Like="<<seedquality[index]<<
2057 "LikeF="<<seedquality2[index]<<
2058 "S0.="<<&seed[index][0]<<
2059 "S1.="<<&seed[index][1]<<
2060 "S2.="<<&seed[index][2]<<
2061 "S3.="<<&seed[index][3]<<
2062 "S4.="<<&seed[index][4]<<
2063 "S5.="<<&seed[index][5]<<
2067 "FakeRatio="<<fakeratio<<
2068 "Freq="<<frequency<<
2070 "Nlayers="<<nlayers<<
2071 "Findable="<<findable<<
2074 "EventNr="<<eventNr<<
2078 } // end of loop over sectors
2082 //_____________________________________________________________________________
2083 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree) const
2086 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2087 // from the file. The names of the cluster tree and branches
2088 // should match the ones used in AliTRDclusterizer::WriteClusters()
2090 Int_t nsize = Int_t(ClusterTree->GetTotBytes()/(sizeof(AliTRDcluster)));
2091 TObjArray *clusterArray = new TObjArray(nsize+1000);
2093 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2095 Error("ReadClusters","Can't get the branch !");
2098 branch->SetAddress(&clusterArray);
2100 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2101 // printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
2103 // Loop through all entries in the tree
2105 AliTRDcluster *c = 0;
2107 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2110 nbytes += ClusterTree->GetEvent(iEntry);
2112 // Get the number of points in the detector
2113 Int_t nCluster = clusterArray->GetEntriesFast();
2114 // printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2116 // Loop through all TRD digits
2117 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2118 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
2119 AliTRDcluster *co = c;
2121 // delete clusterArray->RemoveAt(iCluster);
2122 clusterArray->RemoveAt(iCluster);
2125 // cout<<"Allocated"<<nsize<<"\tLoaded"<<array->GetEntriesFast()<<"\n";
2127 delete clusterArray;
2132 //__________________________________________________________________
2133 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint& p) const
2136 // Get track space point with index i
2137 // Origin: C.Cheshkov
2140 AliTRDcluster *cl = (AliTRDcluster*)fClusters->UncheckedAt(index);
2141 Int_t idet = cl->GetDetector();
2142 Int_t isector = fGeom->GetSector(idet);
2143 Int_t ichamber= fGeom->GetChamber(idet);
2144 Int_t iplan = fGeom->GetPlane(idet);
2146 local[0]=GetX(isector,iplan,cl->GetLocalTimeBin());
2147 local[1]=cl->GetY();
2148 local[2]=cl->GetZ();
2150 fGeom->RotateBack(idet,local,global);
2151 p.SetXYZ(global[0],global[1],global[2]);
2152 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
2155 iLayer = AliAlignObj::kTRD1;
2158 iLayer = AliAlignObj::kTRD2;
2161 iLayer = AliAlignObj::kTRD3;
2164 iLayer = AliAlignObj::kTRD4;
2167 iLayer = AliAlignObj::kTRD5;
2170 iLayer = AliAlignObj::kTRD6;
2173 Int_t modId = isector*fGeom->Ncham()+ichamber;
2174 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
2175 p.SetVolumeID(volid);
2181 //__________________________________________________________________
2182 void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2185 // This cooks a label. Mmmmh, smells good...
2188 Int_t label=123456789, index, i, j;
2189 Int_t ncl=pt->GetNumberOfClusters();
2190 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
2194 // Int_t s[kRange][2];
2195 Int_t **s = new Int_t* [kRange];
2196 for (i=0; i<kRange; i++) {
2197 s[i] = new Int_t[2];
2199 for (i=0; i<kRange; i++) {
2205 for (i=0; i<ncl; i++) {
2206 index=pt->GetClusterIndex(i);
2207 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2213 for (i=0; i<ncl; i++) {
2214 index=pt->GetClusterIndex(i);
2215 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2216 for (Int_t k=0; k<3; k++) {
2217 label=c->GetLabel(k);
2218 labelAdded=kFALSE; j=0;
2220 while ( (!labelAdded) && ( j < kRange ) ) {
2221 if (s[j][0]==label || s[j][1]==0) {
2235 for (i=0; i<kRange; i++) {
2237 max=s[i][1]; label=s[i][0];
2241 for (i=0; i<kRange; i++) {
2247 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
2249 pt->SetLabel(label);
2254 //__________________________________________________________________
2255 void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2258 // Use clusters, but don't abuse them!
2260 const Float_t kmaxchi2 =18;
2261 const Float_t kmincl =10;
2262 AliTRDtrack * track = (AliTRDtrack*)t;
2264 Int_t ncl=t->GetNumberOfClusters();
2265 for (Int_t i=from; i<ncl; i++) {
2266 Int_t index = t->GetClusterIndex(i);
2267 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2269 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2270 if (track->fTracklets[iplane].GetChi2()>kmaxchi2) continue;
2271 if (track->fTracklets[iplane].GetN()<kmincl) continue;
2272 if (!(c->IsUsed())) c->Use();
2277 //_____________________________________________________________________
2278 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2280 // Parametrised "expected" error of the cluster reconstruction in Y
2282 Double_t s = 0.08 * 0.08;
2286 //_____________________________________________________________________
2287 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2289 // Parametrised "expected" error of the cluster reconstruction in Z
2291 Double_t s = 9 * 9 /12.;
2295 //_____________________________________________________________________
2296 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2299 // Returns radial position which corresponds to time bin <localTB>
2300 // in tracking sector <sector> and plane <plane>
2303 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2304 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2305 return fTrSec[sector]->GetLayer(pl)->GetX();
2310 //_______________________________________________________
2311 AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
2312 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex, Int_t plane)
2315 // AliTRDpropagationLayer constructor
2318 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
2319 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
2322 for(Int_t i=0; i < (Int_t) kZones; i++) {
2323 fZc[i]=0; fZmax[i] = 0;
2328 if(fTimeBinIndex >= 0) {
2329 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2330 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2333 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
2344 //_______________________________________________________
2345 void AliTRDtracker::AliTRDpropagationLayer::SetHole(
2346 Double_t Zmax, Double_t Ymax, Double_t rho,
2347 Double_t radLength, Double_t Yc, Double_t Zc)
2350 // Sets hole in the layer
2358 fHoleX0 = radLength;
2362 //_______________________________________________________
2363 AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs)
2366 // AliTRDtrackingSector Constructor
2368 AliTRDpadPlane *padPlane = 0;
2374 // get holes description from geometry
2375 Bool_t holes[AliTRDgeometry::kNcham];
2376 //printf("sector\t%d\t",gs);
2377 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
2378 holes[icham] = fGeom->IsHole(0,icham,gs);
2379 //printf("%d",holes[icham]);
2383 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
2386 AliTRDpropagationLayer* ppl;
2388 Double_t x, dx, rho, radLength;
2391 // add layers for each of the planes
2392 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2393 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2396 const Int_t kNchambers = AliTRDgeometry::Ncham();
2398 Double_t ymaxsensitive=0;
2399 Double_t *zc = new Double_t[kNchambers];
2400 Double_t *zmax = new Double_t[kNchambers];
2401 Double_t *zmaxsensitive = new Double_t[kNchambers];
2403 AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
2406 printf("<AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector> ");
2407 printf("Could not get common params\n");
2411 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
2413 ymax = fGeom->GetChamberWidth(plane)/2.;
2414 // Modidified for new pad plane class, 22.04.05 (C.B.)
2415 padPlane = commonParam->GetPadPlane(plane,0);
2416 ymaxsensitive = (padPlane->GetColSize(1)*padPlane->GetNcols()-4)/2.;
2417 for(Int_t ch = 0; ch < kNchambers; ch++) {
2418 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
2420 // Modidified for new pad plane class, 22.04.05 (C.B.)
2421 Float_t pad = padPlane->GetRowSize(1);
2422 Float_t row0 = commonParam->GetRow0(plane,ch,0);
2423 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
2424 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
2425 zc[ch] = -(pad * nPads)/2 + row0;
2428 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
2429 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
2430 rho = 0.00295 * 0.85; radLength = 11.0;
2432 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
2433 //Double_t xbottom = x0 - dxDrift;
2434 //Double_t xtop = x0 + dxAmp;
2436 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2437 for (Int_t iTime = 0; iTime<nTimeBins; iTime++){
2438 Double_t xlayer = iTime*dx - dxAmp;
2439 //if (xlayer<0) xlayer=dxAmp/2.;
2442 tbIndex = CookTimeBinIndex(plane, iTime);
2443 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex, plane);
2444 ppl->SetYmax(ymax,ymaxsensitive);
2445 ppl->SetZ(zc, zmax, zmaxsensitive);
2446 ppl->SetHoles(holes);
2454 delete [] zmaxsensitive;
2458 //______________________________________________________
2460 Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
2463 // depending on the digitization parameters calculates "global"
2464 // time bin index for timebin <localTB> in plane <plane>
2467 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2468 Int_t gtb = (plane+1) * tbPerPlane - localTB -1;
2469 if (localTB<0) return -1;
2470 if (gtb<0) return -1;
2474 //______________________________________________________
2476 void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2479 // For all sensitive time bins sets corresponding layer index
2480 // in the array fTimeBins
2485 for(Int_t i = 0; i < fN; i++) {
2486 index = fLayers[i]->GetTimeBinIndex();
2488 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2490 if(index < 0) continue;
2491 if(index >= (Int_t) kMaxTimeBinIndex) {
2492 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2493 printf(" index %d exceeds allowed maximum of %d!\n",
2494 index, kMaxTimeBinIndex-1);
2497 fTimeBinIndex[index] = i;
2502 //______________________________________________________
2505 Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2508 // Returns the number of time bin which in radial position is closest to <x>
2511 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2512 if(x <= fLayers[0]->GetX()) return 0;
2514 Int_t b=0, e=fN-1, m=(b+e)/2;
2515 for (; b<e; m=(b+e)/2) {
2516 if (x > fLayers[m]->GetX()) b=m+1;
2519 if(TMath::Abs(x - fLayers[m]->GetX()) >
2520 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2525 //______________________________________________________
2527 Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2530 // Returns number of the innermost SENSITIVE propagation layer
2533 return GetLayerNumber(0);
2536 //______________________________________________________
2538 Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2541 // Returns number of the outermost SENSITIVE time bin
2544 return GetLayerNumber(GetNumberOfTimeBins() - 1);
2547 //______________________________________________________
2549 Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2552 // Returns number of SENSITIVE time bins
2556 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
2557 layer = GetLayerNumber(tb);
2563 //______________________________________________________
2565 void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2568 // Insert layer <pl> in fLayers array.
2569 // Layers are sorted according to X coordinate.
2571 if ( fN == ((Int_t) kMaxLayersPerSector)) {
2572 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2575 if (fN==0) {fLayers[fN++] = pl; return;}
2576 Int_t i=Find(pl->GetX());
2578 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2579 fLayers[i]=pl; fN++;
2583 //______________________________________________________
2585 Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2588 // Returns index of the propagation layer nearest to X
2591 if (x <= fLayers[0]->GetX()) return 0;
2592 if (x > fLayers[fN-1]->GetX()) return fN;
2593 Int_t b=0, e=fN-1, m=(b+e)/2;
2594 for (; b<e; m=(b+e)/2) {
2595 if (x > fLayers[m]->GetX()) b=m+1;
2605 //______________________________________________________
2606 void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2609 // set centers and the width of sectors
2610 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2611 fZc[icham] = center[icham];
2612 fZmax[icham] = w[icham];
2613 fZmaxSensitive[icham] = wsensitive[icham];
2614 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2617 //______________________________________________________
2619 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2622 // set centers and the width of sectors
2624 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2625 fIsHole[icham] = holes[icham];
2626 if (holes[icham]) fHole = kTRUE;
2634 //______________________________________________________
2636 void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
2639 // Insert cluster in cluster array.
2640 // Clusters are sorted according to Y coordinate.
2642 if(fTimeBinIndex < 0) {
2643 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
2647 if (fN== (Int_t) kMaxClusterPerTimeBin) {
2648 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
2651 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
2652 Int_t i=Find(c->GetY());
2653 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
2654 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
2655 fIndex[i]=index; fClusters[i]=c; fN++;
2658 //______________________________________________________
2660 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const {
2662 // Returns index of the cluster nearest in Y
2664 if (fN<=0) return 0;
2665 if (y <= fClusters[0]->GetY()) return 0;
2666 if (y > fClusters[fN-1]->GetY()) return fN;
2667 Int_t b=0, e=fN-1, m=(b+e)/2;
2668 for (; b<e; m=(b+e)/2) {
2669 if (y > fClusters[m]->GetY()) b=m+1;
2675 Int_t AliTRDtracker::AliTRDpropagationLayer::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad, Float_t maxroadz) const
2678 // Returns index of the cluster nearest to the given y,z
2682 Float_t mindist = maxroad;
2684 for (Int_t i=Find(y-maxroad); i<maxn; i++) {
2685 AliTRDcluster* c=(AliTRDcluster*)(fClusters[i]);
2686 Float_t ycl = c->GetY();
2688 if (ycl > y+maxroad) break;
2689 if (TMath::Abs(c->GetZ()-z) > maxroadz) continue;
2690 if (TMath::Abs(ycl-y)<mindist){
2691 mindist = TMath::Abs(ycl-y);
2699 //---------------------------------------------------------
2701 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
2703 // Returns correction factor for tilted pads geometry
2705 Int_t det = c->GetDetector();
2706 Int_t plane = fGeom->GetPlane(det);
2707 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
2708 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
2710 if(fNoTilt) h01 = 0;
2715 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack& TRDtrack)
2717 // *** ADDED TO GET MORE INFORMATION FOR TRD PID ---- PS
2718 // This is setting fdEdxPlane and fTimBinPlane
2719 // Sums up the charge in each plane for track TRDtrack and also get the
2720 // Time bin for Max. Cluster
2721 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
2723 Double_t clscharge[kNPlane], maxclscharge[kNPlane];
2724 Int_t nCluster[kNPlane], timebin[kNPlane];
2726 //Initialization of cluster charge per plane.
2727 for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2728 clscharge[iPlane] = 0.0;
2729 nCluster[iPlane] = 0;
2730 timebin[iPlane] = -1;
2731 maxclscharge[iPlane] = 0.0;
2734 // Loop through all clusters associated to track TRDtrack
2735 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
2736 for (Int_t iClus = 0; iClus < nClus; iClus++) {
2737 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
2738 Int_t index = TRDtrack.GetClusterIndex(iClus);
2739 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
2740 if (!pTRDcluster) continue;
2741 Int_t tb = pTRDcluster->GetLocalTimeBin();
2743 Int_t detector = pTRDcluster->GetDetector();
2744 Int_t iPlane = fGeom->GetPlane(detector);
2745 clscharge[iPlane] = clscharge[iPlane]+charge;
2746 if(charge > maxclscharge[iPlane]) {
2747 maxclscharge[iPlane] = charge;
2748 timebin[iPlane] = tb;
2751 } // end of loop over cluster
2753 // Setting the fdEdxPlane and fTimBinPlane variabales
2754 Double_t totalCharge = 0;
2755 for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2756 // Quality control of TRD track.
2757 if (nCluster[iPlane]<= 5) {
2758 clscharge[iPlane]=0.0;
2761 if (nCluster[iPlane]) clscharge[iPlane] /= nCluster[iPlane];
2762 TRDtrack.SetPIDsignals(clscharge[iPlane], iPlane);
2763 TRDtrack.SetPIDTimBin(timebin[iPlane], iPlane);
2764 totalCharge= totalCharge+clscharge[iPlane];
2767 // Int_t nc=TRDtrack.GetNumberOfClusters();
2769 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
2771 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2772 // TRDtrack.SetPIDsignals(dedx, iPlane);
2773 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
2776 } // end of function
2779 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack * track, Int_t *clusters,AliTRDtracklet&tracklet)
2783 // try to find nearest clusters to the track in timebins from t0 to t1
2787 // correction coeficients - depends on TRD parameters - to be changed according it
2790 Double_t x[100],yt[100],zt[100];
2791 Double_t xmean=0; //reference x
2792 Double_t dz[10][100],dy[10][100];
2793 Float_t zmean[100], nmean[100];
2795 Int_t indexes[10][100]; // indexes of the clusters in the road
2796 AliTRDcluster *cl[10][100]; // pointers to the clusters in the road
2797 Int_t best[10][100]; // index of best matching cluster
2801 for (Int_t it=0;it<=t1-t0; it++){
2809 for (Int_t ih=0;ih<10;ih++){
2810 indexes[ih][it]=-2; //reset indexes1
2818 Double_t x0 = track->GetX();
2819 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
2825 Float_t padlength=0;
2826 AliTRDtrack track2(*track);
2827 Float_t snpy = track->GetSnp();
2828 Float_t tany = TMath::Sqrt(snpy*snpy/(1.-snpy*snpy));
2829 if (snpy<0) tany*=-1;
2831 Double_t sy2=ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
2832 Double_t sz2=ExpectedSigmaZ2(x0,track->GetTgl());
2833 Double_t road = 15.*sqrt(track->GetSigmaY2() + sy2);
2834 if (road>6.) road=6.;
2837 for (Int_t it=0;it<t1-t0;it++){
2838 Double_t maxChi2[2]={fgkMaxChi2,fgkMaxChi2};
2839 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(it+t0));
2840 if (timeBin==0) continue; // no indexes1
2841 Int_t maxn = timeBin;
2842 x[it] = timeBin.GetX();
2843 track2.PropagateTo(x[it]);
2844 yt[it] = track2.GetY();
2845 zt[it] = track2.GetZ();
2847 Double_t y=yt[it],z=zt[it];
2848 Double_t chi2 =1000000;
2851 // find 2 nearest cluster at given time bin
2854 for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
2855 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
2856 h01 = GetTiltFactor(c);
2858 Int_t det = c->GetDetector();
2859 plane = fGeom->GetPlane(det);
2860 padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
2862 // if (c->GetLocalTimeBin()==0) continue;
2863 if (c->GetY() > y+road) break;
2864 if((c->GetZ()-z)*(c->GetZ()-z) > 12. * sz2) continue;
2866 Double_t dist = TMath::Abs(c->GetZ()-z);
2867 if (dist> (0.5*padlength+6.*sigmaz)) continue; // 6 sigma boundary cut
2870 if (dist> (0.5*padlength-sigmaz)){ // sigma boundary cost function
2871 cost = (dist-0.5*padlength)/(2.*sigmaz);
2872 if (cost>-1) cost= (cost+1.)*(cost+1.);
2875 // Int_t label = TMath::Abs(track->GetLabel());
2876 // if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
2877 chi2=track2.GetPredictedChi2(c,h01)+cost;
2880 if (chi2 > maxChi2[1]) continue;
2881 detector = c->GetDetector();
2883 for (Int_t ih=2;ih<9; ih++){ //store the clusters in the road
2886 indexes[ih][it] =timeBin.GetIndex(i); // index - 9 - reserved for outliers
2891 if (chi2 <maxChi2[0]){
2892 maxChi2[1] = maxChi2[0];
2894 indexes[1][it] = indexes[0][it];
2895 cl[1][it] = cl[0][it];
2896 indexes[0][it] = timeBin.GetIndex(i);
2902 indexes[1][it] =timeBin.GetIndex(i);
2910 if (nfound<4) return 0;
2911 xmean /=Float_t(nfound); // middle x
2912 track2.PropagateTo(xmean); // propagate track to the center
2914 // choose one of the variants
2920 Double_t sumdy2 = 0;
2930 Double_t moffset[10]; // mean offset
2931 Double_t mean[10]; // mean value
2932 Double_t angle[10]; // angle
2934 Double_t smoffset[10]; // sigma of mean offset
2935 Double_t smean[10]; // sigma of mean value
2936 Double_t sangle[10]; // sigma of angle
2937 Double_t smeanangle[10]; // correlation
2939 Double_t sigmas[10];
2940 Double_t tchi2s[10]; // chi2s for tracklet
2944 for (Int_t it=0;it<t1-t0;it++){
2945 if (!cl[0][it]) continue;
2946 for (Int_t dt=-3;dt<=3;dt++){
2947 if (it+dt<0) continue;
2948 if (it+dt>t1-t0) continue;
2949 if (!cl[0][it+dt]) continue;
2950 zmean[it]+=cl[0][it+dt]->GetZ();
2953 zmean[it]/=nmean[it];
2956 for (Int_t it=0; it<t1-t0;it++){
2958 for (Int_t ih=0;ih<10;ih++){
2961 if (!cl[ih][it]) continue;
2962 Double_t xcluster = cl[ih][it]->GetX();
2963 Double_t ytrack,ztrack;
2964 track2.GetProlongation(xcluster, ytrack, ztrack );
2965 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // calculate distance from track in z
2966 dy[ih][it] = cl[ih][it]->GetY()+ dz[ih][it]*h01 -ytrack; // in y
2969 if (!cl[0][it]) continue;
2970 if (TMath::Abs(cl[0][it]->GetZ()-zmean[it])> padlength*0.8 &&cl[1][it])
2971 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it])< padlength*0.5){
2976 // iterative choosing of "best path"
2979 Int_t label = TMath::Abs(track->GetLabel());
2982 for (Int_t iter=0;iter<9;iter++){
2985 sumz = 0; sum=0; sumdy=0;sumdy2=0;sumx=0;sumx2=0;sumxy=0;mpads=0; ngood[iter]=0; nbad[iter]=0;
2987 for (Int_t it=0;it<t1-t0;it++){
2988 if (!cl[best[iter][it]][it]) continue;
2989 //calculates pad-row changes
2990 Double_t zbefore= cl[best[iter][it]][it]->GetZ();
2991 Double_t zafter = cl[best[iter][it]][it]->GetZ();
2992 for (Int_t itd = it-1; itd>=0;itd--) {
2993 if (cl[best[iter][itd]][itd]) {
2994 zbefore= cl[best[iter][itd]][itd]->GetZ();
2998 for (Int_t itd = it+1; itd<t1-t0;itd++) {
2999 if (cl[best[iter][itd]][itd]) {
3000 zafter= cl[best[iter][itd]][itd]->GetZ();
3004 if (TMath::Abs(cl[best[iter][it]][it]->GetZ()-zbefore)>0.1&&TMath::Abs(cl[best[iter][it]][it]->GetZ()-zafter)>0.1) changes[iter]++;
3006 Double_t dx = x[it]-xmean; // distance to reference x
3007 sumz += cl[best[iter][it]][it]->GetZ();
3009 sumdy += dy[best[iter][it]][it];
3010 sumdy2+= dy[best[iter][it]][it]*dy[best[iter][it]][it];
3013 sumxy += dx*dy[best[iter][it]][it];
3014 mpads += cl[best[iter][it]][it]->GetNPads();
3015 if (cl[best[iter][it]][it]->GetLabel(0)==label || cl[best[iter][it]][it]->GetLabel(1)==label||cl[best[iter][it]][it]->GetLabel(2)==label){
3023 // calculates line parameters
3025 Double_t det = sum*sumx2-sumx*sumx;
3026 angle[iter] = (sum*sumxy-sumx*sumdy)/det;
3027 mean[iter] = (sumx2*sumdy-sumx*sumxy)/det;
3028 meanz[iter] = sumz/sum;
3029 moffset[iter] = sumdy/sum;
3030 mpads /= sum; // mean number of pads
3033 Double_t sigma2 = 0; // normalized residuals - for line fit
3034 Double_t sigma1 = 0; // normalized residuals - constant fit
3036 for (Int_t it=0;it<t1-t0;it++){
3037 if (!cl[best[iter][it]][it]) continue;
3038 Double_t dx = x[it]-xmean;
3039 Double_t ytr = mean[iter]+angle[iter]*dx;
3040 sigma2 += (dy[best[iter][it]][it]-ytr)*(dy[best[iter][it]][it]-ytr);
3041 sigma1 += (dy[best[iter][it]][it]-moffset[iter])*(dy[best[iter][it]][it]-moffset[iter]);
3044 sigma2 /=(sum-2); // normalized residuals
3045 sigma1 /=(sum-1); // normalized residuals
3047 smean[iter] = sigma2*(sumx2/det); // estimated error2 of mean
3048 sangle[iter] = sigma2*(sum/det); // estimated error2 of angle
3049 smeanangle[iter] = sigma2*(-sumx/det); // correlation
3052 sigmas[iter] = TMath::Sqrt(sigma1); //
3053 smoffset[iter]= (sigma1/sum)+0.01*0.01; // sigma of mean offset + unisochronity sigma
3055 // iterative choosing of "better path"
3057 for (Int_t it=0;it<t1-t0;it++){
3058 if (!cl[best[iter][it]][it]) continue;
3060 Double_t sigmatr2 = smoffset[iter]+0.5*tany*tany; //add unisochronity + angular effect contribution
3061 Double_t sweight = 1./sigmatr2+1./track->GetSigmaY2();
3062 Double_t weighty = (moffset[iter]/sigmatr2)/sweight; // weighted mean
3063 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1+track->GetSigmaY2()); //
3064 Double_t mindist=100000;
3066 for (Int_t ih=0;ih<10;ih++){
3067 if (!cl[ih][it]) break;
3068 Double_t dist2 = (dy[ih][it]-weighty)/sigmacl;
3069 dist2*=dist2; //chi2 distance
3075 best[iter+1][it]=ihbest;
3078 // update best hypothesy if better chi2 according tracklet position and angle
3080 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3081 Double_t sa2 = sangle[iter] + track->fCee;
3082 Double_t say = track->fCey;
3083 // Double_t chi20 = mean[bestiter]*mean[bestiter]/sy2+angle[bestiter]*angle[bestiter]/sa2;
3084 // Double_t chi21 = mean[iter]*mean[iter]/sy2+angle[iter]*angle[iter]/sa2;
3086 Double_t detchi = sy2*sa2-say*say;
3087 Double_t invers[3] = {sa2/detchi, sy2/detchi, -say/detchi}; //inverse value of covariance matrix
3089 Double_t chi20 = mean[bestiter]*mean[bestiter]*invers[0]+angle[bestiter]*angle[bestiter]*invers[1]+
3090 2.*mean[bestiter]*angle[bestiter]*invers[2];
3091 Double_t chi21 = mean[iter]*mean[iter]*invers[0]+angle[iter]*angle[iter]*invers[1]+
3092 2*mean[iter]*angle[iter]*invers[2];
3093 tchi2s[iter] =chi21;
3095 if (changes[iter]<=changes[bestiter] && chi21<chi20) {
3102 Double_t sigma2 = sigmas[0]; // choose as sigma from 0 iteration
3103 Short_t maxpos = -1;
3104 Float_t maxcharge = 0;
3105 Short_t maxpos4 = -1;
3106 Float_t maxcharge4 = 0;
3107 Short_t maxpos5 = -1;
3108 Float_t maxcharge5 = 0;
3110 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
3111 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
3113 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0));
3114 Double_t expectederr = sigma2*sigma2+0.01*0.01;
3115 if (mpads>3.5) expectederr += (mpads-3.5)*0.04;
3116 if (changes[bestiter]>1) expectederr+= changes[bestiter]*0.01;
3117 expectederr+=(0.03*(tany-exB)*(tany-exB))*15;
3118 // if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
3119 //expectederr+=10000;
3120 for (Int_t it=0;it<t1-t0;it++){
3121 if (!cl[best[bestiter][it]][it]) continue;
3122 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // set cluster error
3123 if (!cl[best[bestiter][it]][it]->IsUsed()){
3124 cl[best[bestiter][it]][it]->SetY( cl[best[bestiter][it]][it]->GetY());
3125 // cl[best[bestiter][it]][it]->Use();
3128 // time bins with maximal charge
3129 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){
3130 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3131 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3134 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){
3135 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){
3136 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3137 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3140 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){
3141 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){
3142 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3143 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3147 // time bins with maximal charge
3148 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){
3149 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3150 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3153 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){
3154 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){
3155 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3156 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3159 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){
3160 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){
3161 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3162 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3165 clusters[it+t0] = indexes[best[bestiter][it]][it];
3166 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 && cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0] = indexes[best[bestiter][it]][it]; //Test
3169 // set tracklet parameters
3171 Double_t trackleterr2 = smoffset[bestiter]+0.01*0.01;
3172 if (mpads>3.5) trackleterr2 += (mpads-3.5)*0.04;
3173 trackleterr2+= changes[bestiter]*0.01;
3174 trackleterr2*= TMath::Max(14.-nfound,1.);
3175 trackleterr2+= 0.2*(tany-exB)*(tany-exB);
3177 tracklet.Set(xmean, track2.GetY()+moffset[bestiter], meanz[bestiter], track2.GetAlpha(), trackleterr2); //set tracklet parameters
3178 tracklet.SetTilt(h01);
3179 tracklet.SetP0(mean[bestiter]);
3180 tracklet.SetP1(angle[bestiter]);
3181 tracklet.SetN(nfound);
3182 tracklet.SetNCross(changes[bestiter]);
3183 tracklet.SetPlane(plane);
3184 tracklet.SetSigma2(expectederr);
3185 tracklet.SetChi2(tchi2s[bestiter]);
3186 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
3187 track->fTracklets[plane] = tracklet;
3188 track->fNWrong+=nbad[0];
3192 TClonesArray array0("AliTRDcluster");
3193 TClonesArray array1("AliTRDcluster");
3194 array0.ExpandCreateFast(t1-t0+1);
3195 array1.ExpandCreateFast(t1-t0+1);
3196 TTreeSRedirector& cstream = *fDebugStreamer;
3197 AliTRDcluster dummy;
3201 for (Int_t it=0;it<t1-t0;it++){
3202 dy0[it] = dy[0][it];
3203 dyb[it] = dy[best[bestiter][it]][it];
3205 new(array0[it]) AliTRDcluster(*cl[0][it]);
3208 new(array0[it]) AliTRDcluster(dummy);
3210 if(cl[best[bestiter][it]][it]) {
3211 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
3214 new(array1[it]) AliTRDcluster(dummy);
3217 TGraph graph0(t1-t0,x,dy0);
3218 TGraph graph1(t1-t0,x,dyb);
3219 TGraph graphy(t1-t0,x,yt);
3220 TGraph graphz(t1-t0,x,zt);
3223 cstream<<"tracklet"<<
3224 "track.="<<track<< // track parameters
3225 "tany="<<tany<< // tangent of the local track angle
3226 "xmean="<<xmean<< // xmean - reference x of tracklet
3227 "tilt="<<h01<< // tilt angle
3228 "nall="<<nall<< // number of foundable clusters
3229 "nfound="<<nfound<< // number of found clusters
3230 "clfound="<<clfound<< // total number of found clusters in road
3231 "mpads="<<mpads<< // mean number of pads per cluster
3232 "plane="<<plane<< // plane number
3233 "detector="<<detector<< // detector number
3234 "road="<<road<< // the width of the used road
3235 "graph0.="<<&graph0<< // x - y = dy for closest cluster
3236 "graph1.="<<&graph1<< // x - y = dy for second closest cluster
3237 "graphy.="<<&graphy<< // y position of the track
3238 "graphz.="<<&graphz<< // z position of the track
3239 // "fCl.="<<&array0<< // closest cluster
3240 //"fCl2.="<<&array1<< // second closest cluster
3241 "maxpos="<<maxpos<< // maximal charge postion
3242 "maxcharge="<<maxcharge<< // maximal charge
3243 "maxpos4="<<maxpos4<< // maximal charge postion - after bin 4
3244 "maxcharge4="<<maxcharge4<< // maximal charge - after bin 4
3245 "maxpos5="<<maxpos5<< // maximal charge postion - after bin 5
3246 "maxcharge5="<<maxcharge5<< // maximal charge - after bin 5
3248 "bestiter="<<bestiter<< // best iteration number
3249 "tracklet.="<<&tracklet<< // corrspond to the best iteration
3250 "tchi20="<<tchi2s[0]<< // chi2 of cluster in the 0 iteration
3251 "tchi2b="<<tchi2s[bestiter]<< // chi2 of cluster in the best iteration
3252 "sigmas0="<<sigmas[0]<< // residuals sigma
3253 "sigmasb="<<sigmas[bestiter]<< // residulas sigma
3255 "ngood0="<<ngood[0]<< // number of good clusters in 0 iteration
3256 "nbad0="<<nbad[0]<< // number of bad clusters in 0 iteration
3257 "ngoodb="<<ngood[bestiter]<< // in best iteration
3258 "nbadb="<<nbad[bestiter]<< // in best iteration
3260 "changes0="<<changes[0]<< // changes of pardrows in iteration number 0
3261 "changesb="<<changes[bestiter]<< // changes of pardrows in best iteration
3263 "moffset0="<<moffset[0]<< // offset fixing angle in iter=0
3264 "smoffset0="<<smoffset[0]<< // sigma of offset fixing angle in iter=0
3265 "moffsetb="<<moffset[bestiter]<< // offset fixing angle in iter=best
3266 "smoffsetb="<<smoffset[bestiter]<< // sigma of offset fixing angle in iter=best
3268 "mean0="<<mean[0]<< // mean dy in iter=0;
3269 "smean0="<<smean[0]<< // sigma of mean dy in iter=0
3270 "meanb="<<mean[bestiter]<< // mean dy in iter=best
3271 "smeanb="<<smean[bestiter]<< // sigma of mean dy in iter=best
3273 "angle0="<<angle[0]<< // angle deviation in the iteration number 0
3274 "sangle0="<<sangle[0]<< // sigma of angular deviation in iteration number 0
3275 "angleb="<<angle[bestiter]<< // angle deviation in the best iteration
3276 "sangleb="<<sangle[bestiter]<< // sigma of angle deviation in the best iteration
3278 "expectederr="<<expectederr<< // expected error of cluster position
3286 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down)
3289 // Sort eleements according occurancy
3290 // The size of output array has is 2*n
3292 Int_t * sindexS = new Int_t[n]; // temp array for sorting
3293 Int_t * sindexF = new Int_t[2*n];
3294 for (Int_t i=0;i<n;i++) sindexF[i]=0;
3296 TMath::Sort(n,inlist, sindexS, down);
3297 Int_t last = inlist[sindexS[0]];
3300 sindexF[0+n] = last;
3304 for(Int_t i=1;i<n; i++){
3305 val = inlist[sindexS[i]];
3306 if (last == val) sindexF[countPos]++;
3309 sindexF[countPos+n] = val;
3310 sindexF[countPos]++;
3314 if (last==val) countPos++;
3315 // sort according frequency
3316 TMath::Sort(countPos, sindexF, sindexS, kTRUE);
3317 for (Int_t i=0;i<countPos;i++){
3318 outlist[2*i ] = sindexF[sindexS[i]+n];
3319 outlist[2*i+1] = sindexF[sindexS[i]];
3327 AliTRDtrack * AliTRDtracker::RegisterSeed(AliTRDseed * seeds, Double_t * params)
3332 Double_t alpha=AliTRDgeometry::GetAlpha();
3333 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
3336 c[1] = 0 ; c[2] = 2;
3337 c[3] = 0 ; c[4] = 0; c[5] = 0.02;
3338 c[6] = 0 ; c[7] = 0; c[8] = 0; c[9] = 0.1;
3339 c[10] = 0 ; c[11] = 0; c[12] = 0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
3342 AliTRDcluster *cl =0;
3343 for (Int_t ilayer=0;ilayer<6;ilayer++){
3344 if (seeds[ilayer].IsOK()){
3345 for (Int_t itime=22;itime>0;itime--){
3346 if (seeds[ilayer].fIndexes[itime]>0){
3347 index = seeds[ilayer].fIndexes[itime];
3348 cl = seeds[ilayer].fClusters[itime];
3355 if (cl==0) return 0;
3356 AliTRDtrack * track = new AliTRDtrack(cl,index,¶ms[1],c, params[0],params[6]*alpha+shift);
3357 track->PropagateTo(params[0]-5.);
3358 track->ResetCovariance(1);
3360 Int_t rc=FollowBackProlongation(*track);
3366 CookdEdxTimBin(*track);
3367 CookLabel(track, 0.9);
3377 AliTRDseed::AliTRDseed()
3381 fTilt =0; // tilting angle
3382 fPadLength = 0; // pad length
3383 fX0 = 0; // x0 position
3384 for (Int_t i=0;i<25;i++){
3385 fX[i]=0; // !x position
3386 fY[i]=0; // !y position
3387 fZ[i]=0; // !z position
3388 fIndexes[i]=0; // !indexes
3389 fClusters[i]=0; // !clusters
3391 for (Int_t i=0;i<2;i++){
3392 fYref[i]=0; // reference y
3393 fZref[i]=0; // reference z
3394 fYfit[i]=0; // y fit position +derivation
3395 fYfitR[i]=0; // y fit position +derivation
3396 fZfit[i]=0; // z fit position
3397 fZfitR[i]=0; // z fit position
3398 fLabels[i]=0; // labels
3402 fMeanz=0; // mean vaue of z
3403 fZProb=0; // max probbable z
3406 fN=0; // number of associated clusters
3407 fN2=0; // number of not crossed
3408 fNUsed=0; // number of used clusters
3409 fNChange=0; // change z counter
3412 void AliTRDseed::Reset(){
3416 for (Int_t i=0;i<25;i++){
3417 fX[i]=0; // !x position
3418 fY[i]=0; // !y position
3419 fZ[i]=0; // !z position
3420 fIndexes[i]=0; // !indexes
3421 fClusters[i]=0; // !clusters
3422 fUsable[i] = kFALSE;
3424 for (Int_t i=0;i<2;i++){
3425 fYref[i]=0; // reference y
3426 fZref[i]=0; // reference z
3427 fYfit[i]=0; // y fit position +derivation
3428 fYfitR[i]=0; // y fit position +derivation
3429 fZfit[i]=0; // z fit position
3430 fZfitR[i]=0; // z fit position
3431 fLabels[i]=-1; // labels
3433 fSigmaY =0; //"robust" sigma in y
3434 fSigmaY2=0; //"robust" sigma in y
3435 fMeanz =0; // mean vaue of z
3436 fZProb =0; // max probbable z
3439 fN=0; // number of associated clusters
3440 fN2=0; // number of not crossed
3441 fNUsed=0; // number of used clusters
3442 fNChange=0; // change z counter
3445 void AliTRDseed::CookLabels(){
3447 // cook 2 labels for seed
3452 for (Int_t i=0;i<25;i++){
3453 if (!fClusters[i]) continue;
3454 for (Int_t ilab=0;ilab<3;ilab++){
3455 if (fClusters[i]->GetLabel(ilab)>=0){
3456 labels[nlab] = fClusters[i]->GetLabel(ilab);
3461 Int_t nlab2 = AliTRDtracker::Freq(nlab,labels,out,kTRUE);
3462 fLabels[0] = out[0];
3463 if (nlab2>1 && out[3]>1) fLabels[1] =out[2];
3466 void AliTRDseed::UseClusters()
3471 for (Int_t i=0;i<25;i++){
3472 if (!fClusters[i]) continue;
3473 if (!(fClusters[i]->IsUsed())) fClusters[i]->Use();
3478 void AliTRDseed::Update(){
3482 const Float_t kRatio = 0.8;
3483 const Int_t kClmin = 6;
3484 const Float_t kmaxtan = 2;
3485 if (TMath::Abs(fYref[1])>kmaxtan) return; // too much inclined track
3487 Float_t sigmaexp = 0.05+TMath::Abs(fYref[1]*0.25); // expected r.m.s in y direction
3488 Float_t ycrosscor = fPadLength*fTilt*0.5; // y correction for crossing
3491 Double_t sumw, sumwx,sumwx2;
3492 Double_t sumwy, sumwxy, sumwz,sumwxz;
3493 Int_t zints[25]; // histograming of the z coordinate - get 1 and second max probable coodinates in z
3495 Float_t allowedz[25]; // allowed z for given time bin
3496 Float_t yres[25]; // residuals from reference
3497 Float_t anglecor = fTilt*fZref[1]; //correction to the angle
3501 for (Int_t i=0;i<25;i++){
3503 if (!fClusters[i]) continue;
3504 yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y
3505 zints[fN] = Int_t(fZ[i]);
3508 if (fN<kClmin) return;
3509 Int_t nz = AliTRDtracker::Freq(fN,zints,zouts,kFALSE);
3511 if (nz<=1) zouts[3]=0;
3512 if (zouts[1]+zouts[3]<kClmin) return;
3514 if (TMath::Abs(zouts[0]-zouts[2])>12.) zouts[3]=0; // z distance bigger than pad - length
3516 Int_t breaktime = -1;
3517 Bool_t mbefore = kFALSE;
3519 Int_t counts[2]={0,0};
3523 // find the break time allowing one chage on pad-rows with maximal numebr of accepted clusters
3526 for (Int_t i=0;i<25;i++){
3527 cumul[i][0] = counts[0];
3528 cumul[i][1] = counts[1];
3529 if (TMath::Abs(fZ[i]-zouts[0])<2) counts[0]++;
3530 if (TMath::Abs(fZ[i]-zouts[2])<2) counts[1]++;
3533 for (Int_t i=0;i<24;i++) {
3534 Int_t after = cumul[24][0]-cumul[i][0];
3535 Int_t before = cumul[i][1];
3536 if (after+before>maxcount) {
3537 maxcount=after+before;
3541 after = cumul[24][1]-cumul[i][1];
3542 before = cumul[i][0];
3543 if (after+before>maxcount) {
3544 maxcount=after+before;
3551 for (Int_t i=0;i<25;i++){
3552 if (i>breaktime) allowedz[i] = mbefore ? zouts[2]:zouts[0];
3553 if (i<=breaktime) allowedz[i] = (!mbefore) ? zouts[2]:zouts[0];
3555 if ( (allowedz[0]>allowedz[24] && fZref[1]<0) || (allowedz[0]<allowedz[24] && fZref[1]>0)){
3557 // tracklet z-direction not in correspondance with track z direction
3560 for (Int_t i=0;i<25;i++){
3561 allowedz[i] = zouts[0]; //only longest taken
3567 // cross pad -row tracklet - take the step change into account
3569 for (Int_t i=0;i<25;i++){
3570 if (!fClusters[i]) continue;
3571 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3572 yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y
3573 if (TMath::Abs(fZ[i]-fZProb)>2){
3574 if (fZ[i]>fZProb) yres[i]+=fTilt*fPadLength;
3575 if (fZ[i]<fZProb) yres[i]-=fTilt*fPadLength;
3581 Double_t mean,sigma;
3582 for (Int_t i=0;i<25;i++){
3583 if (!fClusters[i]) continue;
3584 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3585 yres2[fN2] = yres[i];
3592 EvaluateUni(fN2,yres2,mean,sigma,Int_t(fN2*kRatio-2));
3593 if (sigma<sigmaexp*0.8) sigma=sigmaexp;
3598 sumw=0; sumwx=0; sumwx2=0;
3599 sumwy=0; sumwxy=0; sumwz=0;sumwxz=0;
3604 for (Int_t i=0;i<25;i++){
3606 if (!fClusters[i]) continue;
3607 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3608 if (TMath::Abs(yres[i]-mean)>4.*sigma) continue;
3611 fMPads+=fClusters[i]->GetNPads();
3613 if (fClusters[i]->GetNPads()>4) weight=0.5;
3614 if (fClusters[i]->GetNPads()>5) weight=0.2;
3617 sumw+=weight; sumwx+=x*weight; sumwx2+=x*x*weight;
3618 sumwy+=weight*yres[i]; sumwxy+=weight*(yres[i])*x;
3619 sumwz+=weight*fZ[i]; sumwxz+=weight*fZ[i]*x;
3625 fMeanz = sumwz/sumw;
3626 Float_t correction =0;
3628 // tracklet on boundary
3629 if (fMeanz<fZProb) correction = ycrosscor;
3630 if (fMeanz>fZProb) correction = -ycrosscor;
3632 Double_t det = sumw*sumwx2-sumwx*sumwx;
3633 fYfitR[0] = (sumwx2*sumwy-sumwx*sumwxy)/det;
3634 fYfitR[1] = (sumw*sumwxy-sumwx*sumwy)/det;
3637 for (Int_t i=0;i<25;i++){
3638 if (!fUsable[i]) continue;
3639 Float_t delta = yres[i]-fYfitR[0]-fYfitR[1]*fX[i];
3640 fSigmaY2+=delta*delta;
3642 fSigmaY2 = TMath::Sqrt(fSigmaY2/Float_t(fN2-2));
3644 fZfitR[0] = (sumwx2*sumwz-sumwx*sumwxz)/det;
3645 fZfitR[1] = (sumw*sumwxz-sumwx*sumwz)/det;
3646 fZfit[0] = (sumwx2*sumwz-sumwx*sumwxz)/det;
3647 fZfit[1] = (sumw*sumwxz-sumwx*sumwz)/det;
3648 fYfitR[0] += fYref[0]+correction;
3649 fYfitR[1] += fYref[1];
3650 fYfit[0] = fYfitR[0];
3651 fYfit[1] = fYfitR[1];
3662 void AliTRDseed::UpdateUsed(){
3665 for (Int_t i=0;i<25;i++){
3666 if (!fClusters[i]) continue;
3667 if ((fClusters[i]->IsUsed())) fNUsed++;
3672 void AliTRDseed::EvaluateUni(Int_t nvectors, Double_t *data, Double_t &mean, Double_t &sigma, Int_t hh)
3675 // robust estimator in 1D case MI version
3677 //for the univariate case
3678 //estimates of location and scatter are returned in mean and sigma parameters
3679 //the algorithm works on the same principle as in multivariate case -
3680 //it finds a subset of size hh with smallest sigma, and then returns mean and
3681 //sigma of this subset
3685 Double_t faclts[]={2.6477,2.5092,2.3826,2.2662,2.1587,2.0589,1.9660,1.879,1.7973,1.7203,1.6473};
3686 Int_t *index=new Int_t[nvectors];
3687 TMath::Sort(nvectors, data, index, kFALSE);
3689 Int_t nquant = TMath::Min(Int_t(Double_t(((hh*1./nvectors)-0.5)*40))+1, 11);
3690 Double_t factor = faclts[nquant-1];
3695 Int_t bestindex = -1;
3696 Double_t bestmean = 0;
3697 Double_t bestsigma = data[index[nvectors-1]]-data[index[0]]; // maximal possible sigma
3698 for (Int_t i=0; i<hh; i++){
3699 sumx += data[index[i]];
3700 sumx2 += data[index[i]]*data[index[i]];
3703 Double_t norm = 1./Double_t(hh);
3704 Double_t norm2 = 1./Double_t(hh-1);
3705 for (Int_t i=hh; i<nvectors; i++){
3706 Double_t cmean = sumx*norm;
3707 Double_t csigma = (sumx2 - hh*cmean*cmean)*norm2;
3708 if (csigma<bestsigma){
3715 sumx += data[index[i]]-data[index[i-hh]];
3716 sumx2 += data[index[i]]*data[index[i]]-data[index[i-hh]]*data[index[i-hh]];
3719 Double_t bstd=factor*TMath::Sqrt(TMath::Abs(bestsigma));
3726 Float_t AliTRDseed::FitRiemanTilt(AliTRDseed * cseed, Bool_t terror){
3730 TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed
3731 fitterT2.StoreData(kTRUE);
3732 Float_t xref2 = (cseed[2].fX0+cseed[3].fX0)*0.5; // reference x0 for z
3735 fitterT2.ClearPoints();
3736 for (Int_t iLayer=0; iLayer<6;iLayer++){
3737 if (!cseed[iLayer].IsOK()) continue;
3738 Double_t tilt = cseed[iLayer].fTilt;
3740 for (Int_t itime=0;itime<25;itime++){
3741 if (!cseed[iLayer].fUsable[itime]) continue;
3742 Double_t x = cseed[iLayer].fX[itime]+cseed[iLayer].fX0-xref2; // x relative to the midle chamber
3743 Double_t y = cseed[iLayer].fY[itime];
3744 Double_t z = cseed[iLayer].fZ[itime];
3748 Double_t x2 = cseed[iLayer].fX[itime]+cseed[iLayer].fX0; // global x
3749 Double_t t = 1./(x2*x2+y*y);
3751 uvt[0] = 2.*x2*uvt[1]; // u
3752 uvt[2] = 2.0*tilt*uvt[1];
3753 uvt[3] = 2.0*tilt*x*uvt[1];
3754 uvt[4] = 2.0*(y+tilt*z)*uvt[1];
3756 Double_t error = 2*uvt[1];
3757 if (terror) error*=cseed[iLayer].fSigmaY;
3758 else {error *=0.2;} //default error
3759 fitterT2.AddPoint(uvt,uvt[4],error);
3764 Double_t rpolz0 = fitterT2.GetParameter(3);
3765 Double_t rpolz1 = fitterT2.GetParameter(4);
3767 // linear fitter - not possible to make boundaries
3768 // non accept non possible z and dzdx combination
3770 Bool_t acceptablez =kTRUE;
3771 for (Int_t iLayer=0; iLayer<6;iLayer++){
3772 if (cseed[iLayer].IsOK()){
3773 Double_t zT2 = rpolz0+rpolz1*(cseed[iLayer].fX0 - xref2);
3774 if (TMath::Abs(cseed[iLayer].fZProb-zT2)>cseed[iLayer].fPadLength*0.5+1)
3775 acceptablez = kFALSE;
3779 Double_t zmf = cseed[2].fZref[0]+cseed[2].fZref[1]*(xref2-cseed[2].fX0);
3780 Double_t dzmf = (cseed[2].fZref[1]+ cseed[3].fZref[1])*0.5;
3781 fitterT2.FixParameter(3,zmf);
3782 fitterT2.FixParameter(4,dzmf);
3784 fitterT2.ReleaseParameter(3);
3785 fitterT2.ReleaseParameter(4);
3786 rpolz0 = fitterT2.GetParameter(3);
3787 rpolz1 = fitterT2.GetParameter(4);
3790 Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT);
3792 params[0] = fitterT2.GetParameter(0);
3793 params[1] = fitterT2.GetParameter(1);
3794 params[2] = fitterT2.GetParameter(2);
3795 Double_t curvature = 1+params[1]*params[1]-params[2]*params[0];
3796 for (Int_t iLayer = 0; iLayer<6;iLayer++){
3797 Double_t x = cseed[iLayer].fX0;
3798 Double_t y=0,dy=0, z=0, dz=0;
3800 Double_t res2 = (x*params[0]+params[1]);
3802 res2 = 1.-params[2]*params[0]+params[1]*params[1]-res2;
3804 res2 = TMath::Sqrt(res2);
3805 y = (1-res2)/params[0];
3808 Double_t x0 = -params[1]/params[0];
3809 if (-params[2]*params[0]+params[1]*params[1]+1>0){
3810 Double_t rm1 = params[0]/TMath::Sqrt(-params[2]*params[0]+params[1]*params[1]+1);
3811 if ( 1./(rm1*rm1)-(x-x0)*(x-x0)>0){
3812 Double_t res = (x-x0)/TMath::Sqrt(1./(rm1*rm1)-(x-x0)*(x-x0));
3813 if (params[0]<0) res*=-1.;
3817 z = rpolz0+rpolz1*(x-xref2);
3819 cseed[iLayer].fYref[0] = y;
3820 cseed[iLayer].fYref[1] = dy;
3821 cseed[iLayer].fZref[0] = z;
3822 cseed[iLayer].fZref[1] = dz;
3823 cseed[iLayer].fC = curvature;