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);
301 if (AliTRDReconstructor::StreamLevel()>1){
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 (AliTRDReconstructor::StreamLevel()>0){
607 if (track->GetBackupTrack()){
609 "EventNr="<<eventNr<<
612 "trdback.="<<track->GetBackupTrack()<<
616 "EventNr="<<eventNr<<
624 //Propagation to the TOF (I.Belikov)
625 if (track->GetStop()==kFALSE){
628 Double_t c2=track->GetC()*xtof - track->GetEta();
629 if (TMath::Abs(c2)>=0.99) {
633 Double_t xTOF0 = 370. ;
634 PropagateToX(*track,xTOF0,fgkMaxStep);
636 //energy losses taken to the account - check one more time
637 c2=track->GetC()*xtof - track->GetEta();
638 if (TMath::Abs(c2)>=0.99) {
644 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
645 Double_t y=track->GetYat(xtof);
647 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
651 } else if (y <-ymax) {
652 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
658 if (track->PropagateTo(xtof)) {
659 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
660 for (Int_t i=0;i<kNPlane;i++) {
661 seed->SetTRDsignals(track->GetPIDsignals(i),i);
662 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
664 // seed->SetTRDtrack(new AliTRDtrack(*track));
665 if (track->GetNumberOfClusters()>foundMin) found++;
668 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
669 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
670 //seed->SetStatus(AliESDtrack::kTRDStop);
671 for (Int_t i=0;i<kNPlane;i++) {
672 seed->SetTRDsignals(track->GetPIDsignals(i),i);
673 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
675 //seed->SetTRDtrack(new AliTRDtrack(*track));
679 seed->SetTRDQuality(track->StatusForTOF());
680 seed->SetTRDBudget(track->fBudget[0]);
684 //End of propagation to the TOF
685 //if (foundClr>foundMin)
686 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
691 cerr<<"Number of seeds: "<<fNseeds<<endl;
692 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
694 if (AliTRDReconstructor::SeedingOn()) MakeSeedsMI(3,5,event); //new seeding
696 fSeeds->Clear(); fNseeds=0;
704 //_____________________________________________________________________________
705 Int_t AliTRDtracker::RefitInward(AliESD* event)
708 // Refits tracks within the TRD. The ESD event is expected to contain seeds
709 // at the outer part of the TRD.
710 // The tracks are propagated to the innermost time bin
711 // of the TRD and the ESD event is updated
712 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
715 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
716 Float_t foundMin = fgkMinClustersInTrack * timeBins;
719 // Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
722 Int_t n = event->GetNumberOfTracks();
723 for (Int_t i=0; i<n; i++) {
724 AliESDtrack* seed=event->GetTrack(i);
725 new(&seed2) AliTRDtrack(*seed);
726 if (seed2.GetX()<270){
727 seed->UpdateTrackParams(&seed2, AliESDtrack::kTRDbackup); // backup TPC track - only update
731 ULong_t status=seed->GetStatus();
732 if ( (status & AliESDtrack::kTRDout ) == 0 ) {
735 if ( (status & AliESDtrack::kTRDin) != 0 ) {
739 // if (1/seed2.Get1Pt()>1.5&& seed2.GetX()>260.) {
740 // Double_t oldx = seed2.GetX();
741 // seed2.PropagateTo(500.);
742 // seed2.ResetCovariance(1.);
743 // seed2.PropagateTo(oldx);
746 // seed2.ResetCovariance(5.);
749 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
750 Int_t * indexes2 = seed2.GetIndexes();
751 for (Int_t i=0;i<kNPlane;i++) {
752 pt->SetPIDsignals(seed2.GetPIDsignals(i),i);
753 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
756 Int_t * indexes3 = pt->GetBackupIndexes();
757 for (Int_t i=0;i<200;i++) {
758 if (indexes2[i]==0) break;
759 indexes3[i] = indexes2[i];
761 //AliTRDtrack *pt = seed2;
763 FollowProlongation(t);
764 if (t.GetNumberOfClusters() >= foundMin) {
766 //CookLabel(pt, 1-fgkLabelFraction);
771 // cout<<found<<'\r';
773 if(PropagateToX(t,xTPC,fgkMaxStep)) {
774 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
775 for (Int_t i=0;i<kNPlane;i++) {
776 seed->SetTRDsignals(pt->GetPIDsignals(i),i);
777 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
780 //if not prolongation to TPC - propagate without update
781 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
782 seed2->ResetCovariance(5.);
783 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
785 if (PropagateToX(*pt2,xTPC,fgkMaxStep)) {
786 //pt2->CookdEdx(0.,1.);
787 pt2->CookdEdx( ); // Modification by PS
788 CookdEdxTimBin(*pt2);
789 seed->UpdateTrackParams(pt2, AliESDtrack::kTRDrefit);
790 for (Int_t i=0;i<kNPlane;i++) {
791 seed->SetTRDsignals(pt2->GetPIDsignals(i),i);
792 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
800 cout<<"Number of loaded seeds: "<<nseed<<endl;
801 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
811 //---------------------------------------------------------------------------
812 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t)
814 // Starting from current position on track=t this function tries
815 // to extrapolate the track up to timeBin=0 and to confirm prolongation
816 // if a close cluster is found. Returns the number of clusters
817 // expected to be found in sensitive layers
818 // GeoManager used to estimate mean density
820 Int_t lastplane = GetLastPlane(&t);
821 Double_t radLength = 0.0;
823 Int_t expectedNumberOfClusters = 0;
827 for (Int_t iplane = lastplane; iplane>=0; iplane--){
829 Int_t row0 = GetGlobalTimeBin(0, iplane,GetTimeBinsPerPlane()-1);
830 Int_t rowlast = GetGlobalTimeBin(0, iplane,0);
832 // propagate track close to the plane if neccessary
834 Double_t currentx = fTrSec[0]->GetLayer(rowlast)->GetX();
835 if (currentx < -fgkMaxStep +t.GetX()){
836 //propagate closer to chamber - safety space fgkMaxStep
837 if (!PropagateToX(t, currentx+fgkMaxStep, fgkMaxStep)) break;
839 if (!AdjustSector(&t)) break;
841 // get material budget
843 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
844 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
845 // end global position
846 x = fTrSec[0]->GetLayer(row0)->GetX();
847 if (!t.GetProlongation(x,y,z)) break;
848 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
849 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
851 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
853 radLength = param[1]; // get mean propagation parameters
855 // propagate nad update
857 sector = t.GetSector();
858 // for (Int_t itime=GetTimeBinsPerPlane()-1;itime>=0;itime--) {
859 for (Int_t itime=0 ;itime<GetTimeBinsPerPlane();itime++) {
860 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
861 expectedNumberOfClusters++;
863 if (t.fX>345) t.fNExpectedLast++;
864 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(ilayer));
867 Double_t maxChi2=fgkMaxChi2;
870 AliTRDcluster * cl0 = timeBin[0];
871 if (!cl0) continue; // no clusters in given time bin
872 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
873 if (plane>lastplane) continue;
874 Int_t timebin = cl0->GetLocalTimeBin();
875 AliTRDcluster * cl2= GetCluster(&t,plane, timebin,index);
879 Double_t h01 = GetTiltFactor(cl);
880 maxChi2=t.GetPredictedChi2(cl,h01);
883 // if (cl->GetNPads()<5)
884 Double_t dxsample = timeBin.GetdX();
885 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
886 Double_t h01 = GetTiltFactor(cl);
887 Int_t det = cl->GetDetector();
888 Int_t plane = fGeom->GetPlane(det);
891 t.fChi2Last+=maxChi2;
893 Double_t xcluster = cl->GetX();
894 t.PropagateTo(xcluster,radLength,rho);
895 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
901 return expectedNumberOfClusters;
908 //___________________________________________________________________
909 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
912 // Starting from current radial position of track <t> this function
913 // extrapolates the track up to outer timebin and in the sensitive
914 // layers confirms prolongation if a close cluster is found.
915 // Returns the number of clusters expected to be found in sensitive layers
916 // Use GEO manager for material Description
919 Int_t clusters[1000];
920 for (Int_t i=0;i<1000;i++) clusters[i]=-1;
921 Double_t radLength = 0.0;
923 Int_t expectedNumberOfClusters = 0;
925 AliTRDtracklet tracklet;
928 for (Int_t iplane = 0; iplane<kNPlane; iplane++){
929 Int_t row0 = GetGlobalTimeBin(0, iplane,GetTimeBinsPerPlane()-1);
930 Int_t rowlast = GetGlobalTimeBin(0, iplane,0);
932 Double_t currentx = fTrSec[0]->GetLayer(row0)->GetX();
933 if (currentx<t.GetX()) continue;
935 // propagate closer to chamber if neccessary
937 if (currentx > fgkMaxStep +t.GetX()){
938 if (!PropagateToX(t, currentx-fgkMaxStep, fgkMaxStep)) break;
940 if (!AdjustSector(&t)) break;
941 if (TMath::Abs(t.GetSnp())>fgkMaxSnp) break;
943 // get material budget inside of chamber
945 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
946 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
947 // end global position
948 x = fTrSec[0]->GetLayer(rowlast)->GetX();
949 if (!t.GetProlongation(x,y,z)) break;
950 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
951 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
953 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
955 radLength = param[1]; // get mean propagation parameters
959 sector = t.GetSector();
960 Float_t ncl = FindClusters(sector,row0,rowlast,&t,clusters,tracklet);
961 if (tracklet.GetN()<GetTimeBinsPerPlane()/3) continue;
963 // Propagate and update track
965 for (Int_t itime= GetTimeBinsPerPlane()-1;itime>=0;itime--) {
966 Int_t ilayer = GetGlobalTimeBin(0, iplane,itime);
967 expectedNumberOfClusters++;
969 if (t.fX>345) t.fNExpectedLast++;
970 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(ilayer));
973 Double_t maxChi2=fgkMaxChi2;
977 if (clusters[ilayer]>0) {
978 index = clusters[ilayer];
979 cl = (AliTRDcluster*)GetCluster(index);
980 Double_t h01 = GetTiltFactor(cl);
981 maxChi2=t.GetPredictedChi2(cl,h01);
985 // if (cl->GetNPads()<5)
986 Double_t dxsample = timeBin.GetdX();
987 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
988 Double_t h01 = GetTiltFactor(cl);
989 Int_t det = cl->GetDetector();
990 Int_t plane = fGeom->GetPlane(det);
993 t.fChi2Last+=maxChi2;
995 Double_t xcluster = cl->GetX();
996 t.PropagateTo(xcluster,radLength,rho);
997 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
998 if(!t.Update(cl,maxChi2,index,h01)) {
1002 // reset material budget if 2 consecutive gold
1004 if (t.fTracklets[plane].GetN()+t.fTracklets[plane-1].GetN()>20){
1010 ratio0 = ncl/Float_t(fTimeBinsPerPlane);
1011 Float_t ratio1 = Float_t(t.fN+1)/Float_t(t.fNExpected+1.);
1012 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){
1013 t.MakeBackupTrack(); // make backup of the track until is gold
1018 return expectedNumberOfClusters;
1023 Int_t AliTRDtracker::PropagateToX(AliTRDtrack& t, Double_t xToGo, Double_t maxStep)
1025 // Starting from current radial position of track <t> this function
1026 // extrapolates the track up to radial position <xToGo>.
1027 // Returns 1 if track reaches the plane, and 0 otherwise
1028 const Double_t kEpsilon = 0.00001;
1029 // Double_t tanmax = TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
1030 Double_t xpos = t.GetX();
1031 Double_t dir = (xpos<xToGo) ? 1.:-1.;
1033 while ( (xToGo-xpos)*dir > kEpsilon){
1034 Double_t step = dir*TMath::Min(TMath::Abs(xToGo-xpos), maxStep);
1036 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
1037 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
1040 if (!t.GetProlongation(x,y,z)) return 0; // no prolongation
1042 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
1043 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
1046 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1047 if (!t.PropagateTo(x,param[1],param[0])) return 0;
1057 //_____________________________________________________________________________
1058 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1060 // Fills clusters into TRD tracking_sectors
1061 // Note that the numbering scheme for the TRD tracking_sectors
1062 // differs from that of TRD sectors
1063 cout<<"\n Read Sectors clusters"<<endl;
1064 if (ReadClusters(fClusters,cTree)) {
1065 Error("LoadClusters","Problem with reading the clusters !");
1068 Int_t ncl=fClusters->GetEntriesFast();
1070 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1073 for (Int_t ichamber=0;ichamber<5;ichamber++)
1074 for (Int_t isector=0;isector<18;isector++){
1075 fHoles[ichamber][isector]=kTRUE;
1080 // printf("\r %d left ",ncl);
1081 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
1082 Int_t detector=c->GetDetector();
1083 Int_t localTimeBin=c->GetLocalTimeBin();
1084 Int_t sector=fGeom->GetSector(detector);
1085 Int_t plane=fGeom->GetPlane(detector);
1087 Int_t trackingSector = CookSectorIndex(sector);
1088 if (c->GetLabel(0)>0){
1089 Int_t chamber = fGeom->GetChamber(detector);
1090 fHoles[chamber][trackingSector]=kFALSE;
1093 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1094 if(gtb < 0) continue;
1095 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1099 // apply pos correction
1101 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1106 //_____________________________________________________________________________
1107 void AliTRDtracker::UnloadClusters()
1110 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1115 nentr = fClusters->GetEntriesFast();
1116 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1119 nentr = fSeeds->GetEntriesFast();
1120 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1122 nentr = fTracks->GetEntriesFast();
1123 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1125 Int_t nsec = AliTRDgeometry::kNsect;
1127 for (i = 0; i < nsec; i++) {
1128 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1129 fTrSec[i]->GetLayer(pl)->Clear();
1135 //__________________________________________________________________________
1136 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD * esd)
1139 // Creates seeds using clusters between position inner plane and outer plane
1141 const Double_t kMaxTheta = 1;
1142 const Double_t kMaxPhi = 2.0;
1144 const Double_t kRoad0y = 6; // road for middle cluster
1145 const Double_t kRoad0z = 8.5; // road for middle cluster
1147 const Double_t kRoad1y = 2; // road in y for seeded cluster
1148 const Double_t kRoad1z = 20; // road in z for seeded cluster
1150 const Double_t kRoad2y = 3; // road in y for extrapolated cluster
1151 const Double_t kRoad2z = 20; // road in z for extrapolated cluster
1152 const Int_t kMaxSeed = 3000;
1153 Int_t maxSec=AliTRDgeometry::kNsect;
1156 // linear fitters in planes
1157 TLinearFitter fitterTC(2,"hyp2"); // fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
1158 TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed
1159 fitterTC.StoreData(kTRUE);
1160 fitterT2.StoreData(kTRUE);
1161 AliRieman rieman(1000); // rieman fitter
1162 AliRieman rieman2(1000); // rieman fitter
1164 // find the maximal and minimal layer for the planes
1167 AliTRDpropagationLayer* reflayers[6];
1168 for (Int_t i=0;i<6;i++){layers[i][0]=10000; layers[i][1]=0;}
1169 for (Int_t ns=0;ns<maxSec;ns++){
1170 for (Int_t ilayer=0;ilayer<fTrSec[ns]->GetNumberOfLayers();ilayer++){
1171 AliTRDpropagationLayer& layer=*(fTrSec[ns]->GetLayer(ilayer));
1172 if (layer==0) continue;
1173 Int_t det = layer[0]->GetDetector();
1174 Int_t plane = fGeom->GetPlane(det);
1175 if (ilayer<layers[plane][0]) layers[plane][0] = ilayer;
1176 if (ilayer>layers[plane][1]) layers[plane][1] = ilayer;
1180 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
1181 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
1182 Double_t hL[6]; // tilting angle
1183 Double_t xcl[6]; // x - position of reference cluster
1184 Double_t ycl[6]; // y - position of reference cluster
1185 Double_t zcl[6]; // z - position of reference cluster
1186 AliTRDcluster *cl[6]={0,0,0,0,0,0}; // seeding clusters
1187 Float_t padlength[6]={10,10,10,10,10,10}; //current pad-length
1188 Double_t chi2R =0, chi2Z=0;
1189 Double_t chi2RF =0, chi2ZF=0;
1191 Int_t nclusters; // total number of clusters
1192 for (Int_t i=0;i<6;i++) {hL[i]=h01; if (i%2==1) hL[i]*=-1.;}
1196 AliTRDseed *pseed = new AliTRDseed[kMaxSeed*6];
1197 AliTRDseed *seed[kMaxSeed];
1198 for (Int_t iseed=0;iseed<kMaxSeed;iseed++) seed[iseed]= &pseed[iseed*6];
1199 AliTRDseed *cseed = seed[0];
1201 Double_t seedquality[kMaxSeed];
1202 Double_t seedquality2[kMaxSeed];
1203 Double_t seedparams[kMaxSeed][7];
1204 Int_t seedlayer[kMaxSeed];
1205 Int_t registered =0;
1206 Int_t sort[kMaxSeed];
1210 for (Int_t ns = 0; ns<maxSec; ns++){ //loop over sectors
1211 //for (Int_t ns = 0; ns<5; ns++){ //loop over sectors
1212 registered = 0; // reset registerd seed counter
1213 cseed = seed[registered];
1215 for (Int_t sLayer=2; sLayer>=0;sLayer--){
1216 //for (Int_t dseed=5;dseed<15; dseed+=3){ //loop over central seeding time bins
1218 Int_t dseed = 5+Int_t(iter)*3;
1219 // Initialize seeding layers
1220 for (Int_t ilayer=0;ilayer<6;ilayer++){
1221 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
1222 xcl[ilayer] = reflayers[ilayer]->GetX();
1225 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2])*0.5;
1226 AliTRDpropagationLayer& layer0=*reflayers[sLayer+0];
1227 AliTRDpropagationLayer& layer1=*reflayers[sLayer+1];
1228 AliTRDpropagationLayer& layer2=*reflayers[sLayer+2];
1229 AliTRDpropagationLayer& layer3=*reflayers[sLayer+3];
1231 Int_t maxn3 = layer3;
1232 for (Int_t icl3=0;icl3<maxn3;icl3++){
1233 AliTRDcluster *cl3 = layer3[icl3];
1235 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2()*12.);
1236 ycl[sLayer+3] = cl3->GetY();
1237 zcl[sLayer+3] = cl3->GetZ();
1238 Float_t yymin0 = ycl[sLayer+3] - 1- kMaxPhi *(xcl[sLayer+3]-xcl[sLayer+0]);
1239 Float_t yymax0 = ycl[sLayer+3] + 1+ kMaxPhi *(xcl[sLayer+3]-xcl[sLayer+0]);
1240 Int_t maxn0 = layer0; //
1241 for (Int_t icl0=layer0.Find(yymin0);icl0<maxn0;icl0++){
1242 AliTRDcluster *cl0 = layer0[icl0];
1244 if (cl3->IsUsed()&&cl0->IsUsed()) continue;
1245 ycl[sLayer+0] = cl0->GetY();
1246 zcl[sLayer+0] = cl0->GetZ();
1247 if ( ycl[sLayer+0]>yymax0) break;
1248 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]);
1249 if (TMath::Abs(tanphi)>kMaxPhi) continue;
1250 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]);
1251 if (TMath::Abs(tantheta)>kMaxTheta) continue;
1252 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2()*12.);
1254 // expected position in 1 layer
1255 Double_t y1exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+1]-xcl[sLayer+0]);
1256 Double_t z1exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+1]-xcl[sLayer+0]);
1257 Float_t yymin1 = y1exp - kRoad0y-tanphi;
1258 Float_t yymax1 = y1exp + kRoad0y+tanphi;
1259 Int_t maxn1 = layer1; //
1261 for (Int_t icl1=layer1.Find(yymin1);icl1<maxn1;icl1++){
1262 AliTRDcluster *cl1 = layer1[icl1];
1265 if (cl3->IsUsed()) nusedCl++;
1266 if (cl0->IsUsed()) nusedCl++;
1267 if (cl1->IsUsed()) nusedCl++;
1268 if (nusedCl>1) continue;
1269 ycl[sLayer+1] = cl1->GetY();
1270 zcl[sLayer+1] = cl1->GetZ();
1271 if ( ycl[sLayer+1]>yymax1) break;
1272 if (TMath::Abs(ycl[sLayer+1]-y1exp)>kRoad0y+tanphi) continue;
1273 if (TMath::Abs(zcl[sLayer+1]-z1exp)>kRoad0z) continue;
1274 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2()*12.);
1276 Double_t y2exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+2]-xcl[sLayer+0])+(ycl[sLayer+1]-y1exp);
1277 Double_t z2exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+2]-xcl[sLayer+0]);
1278 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y, kRoad1z);
1279 if (index2<=0) continue;
1280 AliTRDcluster *cl2 = (AliTRDcluster*)GetCluster(index2);
1281 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2()*12.);
1282 ycl[sLayer+2] = cl2->GetY();
1283 zcl[sLayer+2] = cl2->GetZ();
1284 if (TMath::Abs(cl2->GetZ()-z2exp)>kRoad0z) continue;
1287 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
1288 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
1289 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
1290 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
1294 for (Int_t iLayer=0;iLayer<6;iLayer++){
1295 cseed[iLayer].Reset();
1297 chi2Z =0.; chi2R=0.;
1298 for (Int_t iLayer=0;iLayer<4;iLayer++){
1299 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1300 chi2Z += (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer])*
1301 (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer]);
1302 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1303 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1304 chi2R += (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer])*
1305 (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer]);
1306 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1308 if (TMath::Sqrt(chi2R)>1./iter) continue;
1309 if (TMath::Sqrt(chi2Z)>7./iter) continue;
1313 Float_t minmax[2]={-100,100};
1314 for (Int_t iLayer=0;iLayer<4;iLayer++){
1315 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer]*0.5+1 -cseed[sLayer+iLayer].fZref[0];
1316 if (max<minmax[1]) minmax[1]=max;
1317 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer]*0.5-1 -cseed[sLayer+iLayer].fZref[0];
1318 if (min>minmax[0]) minmax[0]=min;
1320 Bool_t isFake = kFALSE;
1321 if (cl0->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1322 if (cl1->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1323 if (cl2->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
1324 if (AliTRDReconstructor::StreamLevel()>0){
1325 if ((!isFake) || (icl3%10)==0 ){ //debugging print
1326 TTreeSRedirector& cstream = *fDebugStreamer;
1334 "X0="<<xcl[sLayer+0]<<
1335 "X1="<<xcl[sLayer+1]<<
1336 "X2="<<xcl[sLayer+2]<<
1337 "X3="<<xcl[sLayer+3]<<
1342 "Seed0.="<<&cseed[sLayer+0]<<
1343 "Seed1.="<<&cseed[sLayer+1]<<
1344 "Seed2.="<<&cseed[sLayer+2]<<
1345 "Seed3.="<<&cseed[sLayer+3]<<
1346 "Zmin="<<minmax[0]<<
1347 "Zmax="<<minmax[1]<<
1352 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1353 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1354 //<<<<<<<<<<<<<<<<<< FIT SEEDING PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1355 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1361 for (Int_t jLayer=0;jLayer<4;jLayer++){
1362 cseed[sLayer+jLayer].fTilt = hL[sLayer+jLayer];
1363 cseed[sLayer+jLayer].fPadLength = padlength[sLayer+jLayer];
1364 cseed[sLayer+jLayer].fX0 = xcl[sLayer+jLayer];
1365 for (Int_t iter=0; iter<2; iter++){
1367 // in iteration 0 we try only one pad-row
1368 // if quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
1370 AliTRDseed tseed = cseed[sLayer+jLayer];
1371 Float_t roadz = padlength[sLayer+jLayer]*0.5;
1372 if (iter>0) roadz = padlength[sLayer+jLayer];
1374 Float_t quality =10000;
1375 for (Int_t iTime=2;iTime<20;iTime++){
1376 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
1377 Double_t dxlayer= layer.GetX()-xcl[sLayer+jLayer];
1378 Double_t zexp = cl[sLayer+jLayer]->GetZ() ;
1380 // try 2 pad-rows in second iteration
1381 zexp = tseed.fZref[0]+ tseed.fZref[1]*dxlayer;
1382 if (zexp>cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()+padlength[sLayer+jLayer]*0.5;
1383 if (zexp<cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()-padlength[sLayer+jLayer]*0.5;
1386 Double_t yexp = tseed.fYref[0]+
1387 tseed.fYref[1]*dxlayer;
1388 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz);
1389 if (index<=0) continue;
1390 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1392 tseed.fIndexes[iTime] = index;
1393 tseed.fClusters[iTime] = cl; // register cluster
1394 tseed.fX[iTime] = dxlayer; // register cluster
1395 tseed.fY[iTime] = cl->GetY(); // register cluster
1396 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1399 //count the number of clusters and distortions into quality
1400 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1401 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1402 TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+
1403 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1404 if (iter==0 && tseed.IsOK()) {
1405 cseed[sLayer+jLayer] = tseed;
1407 if (tquality<5) break;
1409 if (tseed.IsOK() && tquality<quality)
1410 cseed[sLayer+jLayer] = tseed;
1412 if (!cseed[sLayer+jLayer].IsOK()){
1416 cseed[sLayer+jLayer].CookLabels();
1417 cseed[sLayer+jLayer].UpdateUsed();
1418 nusedCl+= cseed[sLayer+jLayer].fNUsed;
1425 if (!isOK) continue;
1427 for (Int_t iLayer=0;iLayer<4;iLayer++){
1428 if (cseed[sLayer+iLayer].IsOK()){
1429 nclusters+=cseed[sLayer+iLayer].fN2;
1435 for (Int_t iLayer=0;iLayer<4;iLayer++){
1436 rieman.AddPoint(xcl[sLayer+iLayer],cseed[sLayer+iLayer].fYfitR[0],
1437 cseed[sLayer+iLayer].fZProb,1,10);
1443 for (Int_t iLayer=0;iLayer<4;iLayer++){
1444 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
1445 chi2R += (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0])*
1446 (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0]);
1447 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
1448 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
1449 chi2Z += (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz)*
1450 (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz);
1451 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
1453 Double_t curv = rieman.GetC();
1458 TMath::Abs(cseed[sLayer+0].fYfitR[1]- cseed[sLayer+0].fYref[1])+
1459 TMath::Abs(cseed[sLayer+1].fYfitR[1]- cseed[sLayer+1].fYref[1])+
1460 TMath::Abs(cseed[sLayer+2].fYfitR[1]- cseed[sLayer+2].fYref[1])+
1461 TMath::Abs(cseed[sLayer+3].fYfitR[1]- cseed[sLayer+3].fYref[1]);
1462 Double_t likea = TMath::Exp(-sumda*10.6);
1463 Double_t likechi2 = 0.0000000001;
1464 if (chi2R<0.5) likechi2+=TMath::Exp(-TMath::Sqrt(chi2R)*7.73);
1465 Double_t likechi2z = TMath::Exp(-chi2Z*0.088)/TMath::Exp(-chi2Z*0.019);
1466 Double_t likeN = TMath::Exp(-(72-nclusters)*0.19);
1467 Double_t like = likea*likechi2*likechi2z*likeN;
1469 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fYref[1]-130*curv)*1.9);
1470 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fZref[1]-
1471 cseed[sLayer+0].fZref[0]/xcl[sLayer+0])*5.9);
1472 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
1474 seedquality[registered] = like;
1475 seedlayer[registered] = sLayer;
1476 if (TMath::Log(0.000000000000001+like)<-15) continue;
1477 AliTRDseed seedb[6];
1478 for (Int_t iLayer=0;iLayer<6;iLayer++){
1479 seedb[iLayer] = cseed[iLayer];
1482 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1483 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1484 //<<<<<<<<<<<<<<< FULL TRACK FIT PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1485 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
1491 // add new layers - avoid long extrapolation
1493 Int_t tLayer[2]={0,0};
1494 if (sLayer==2) {tLayer[0]=1; tLayer[1]=0;}
1495 if (sLayer==1) {tLayer[0]=5; tLayer[1]=0;}
1496 if (sLayer==0) {tLayer[0]=4; tLayer[1]=5;}
1498 for (Int_t iLayer=0;iLayer<2;iLayer++){
1499 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1500 cseed[jLayer].Reset();
1501 cseed[jLayer].fTilt = hL[jLayer];
1502 cseed[jLayer].fPadLength = padlength[jLayer];
1503 cseed[jLayer].fX0 = xcl[jLayer];
1504 // get pad length and rough cluster
1505 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].fYref[0],
1506 cseed[jLayer].fZref[0],kRoad2y,kRoad2z);
1507 if (indexdummy<=0) continue;
1508 AliTRDcluster *cldummy = (AliTRDcluster*)GetCluster(indexdummy);
1509 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2()*12.);
1511 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1513 for (Int_t iLayer=0;iLayer<2;iLayer++){
1514 Int_t jLayer = tLayer[iLayer]; // set tracking layer
1515 if ( (jLayer==0) && !(cseed[1].IsOK())) continue; // break not allowed
1516 if ( (jLayer==5) && !(cseed[4].IsOK())) continue; // break not allowed
1517 Float_t zexp = cseed[jLayer].fZref[0];
1518 Double_t zroad = padlength[jLayer]*0.5+1.;
1521 for (Int_t iter=0;iter<2;iter++){
1522 AliTRDseed tseed = cseed[jLayer];
1523 Float_t quality = 10000;
1524 for (Int_t iTime=2;iTime<20;iTime++){
1525 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
1526 Double_t dxlayer = layer.GetX()-xcl[jLayer];
1527 Double_t yexp = tseed.fYref[0]+tseed.fYref[1]*dxlayer;
1528 Float_t yroad = kRoad1y;
1529 Int_t index = layer.FindNearestCluster(yexp,zexp, yroad, zroad);
1530 if (index<=0) continue;
1531 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1533 tseed.fIndexes[iTime] = index;
1534 tseed.fClusters[iTime] = cl; // register cluster
1535 tseed.fX[iTime] = dxlayer; // register cluster
1536 tseed.fY[iTime] = cl->GetY(); // register cluster
1537 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1541 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1542 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1543 TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+
1544 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1546 if (tquality<quality){
1547 cseed[jLayer]=tseed;
1553 if ( cseed[jLayer].IsOK()){
1554 cseed[jLayer].CookLabels();
1555 cseed[jLayer].UpdateUsed();
1556 nusedf+= cseed[jLayer].fNUsed;
1557 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1563 AliTRDseed bseed[6];
1564 for (Int_t jLayer=0;jLayer<6;jLayer++){
1565 bseed[jLayer] = cseed[jLayer];
1567 Float_t lastquality = 10000;
1568 Float_t lastchi2 = 10000;
1569 Float_t chi2 = 1000;
1572 for (Int_t iter =0; iter<4;iter++){
1574 // sort tracklets according "quality", try to "improve" 4 worst
1576 Float_t sumquality = 0;
1577 Float_t squality[6];
1578 Int_t sortindexes[6];
1579 for (Int_t jLayer=0;jLayer<6;jLayer++){
1580 if (bseed[jLayer].IsOK()){
1581 AliTRDseed &tseed = bseed[jLayer];
1582 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1583 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1584 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1585 TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+
1586 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1587 squality[jLayer] = tquality;
1589 else squality[jLayer]=-1;
1590 sumquality +=squality[jLayer];
1593 if (sumquality>=lastquality || chi2>lastchi2) break;
1594 lastquality = sumquality;
1597 for (Int_t jLayer=0;jLayer<6;jLayer++){
1598 cseed[jLayer] = bseed[jLayer];
1601 TMath::Sort(6,squality,sortindexes,kFALSE);
1604 for (Int_t jLayer=5;jLayer>1;jLayer--){
1605 Int_t bLayer = sortindexes[jLayer];
1606 AliTRDseed tseed = bseed[bLayer];
1607 for (Int_t iTime=2;iTime<20;iTime++){
1608 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
1609 Double_t dxlayer= layer.GetX()-xcl[bLayer];
1611 Double_t zexp = tseed.fZref[0];
1612 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1614 Float_t roadz = padlength[bLayer]+1;
1615 if (TMath::Abs(tseed.fZProb-zexp)> padlength[bLayer]*0.5) {roadz = padlength[bLayer]*0.5;}
1616 if (tseed.fZfit[1]*tseed.fZref[1]<0) {roadz = padlength[bLayer]*0.5;}
1617 if (TMath::Abs(tseed.fZProb-zexp)<0.1*padlength[bLayer]) {
1618 zexp = tseed.fZProb;
1619 roadz = padlength[bLayer]*0.5;
1622 Double_t yexp = tseed.fYref[0]+
1623 tseed.fYref[1]*dxlayer-zcor;
1624 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz);
1625 if (index<=0) continue;
1626 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
1628 tseed.fIndexes[iTime] = index;
1629 tseed.fClusters[iTime] = cl; // register cluster
1630 tseed.fX[iTime] = dxlayer; // register cluster
1631 tseed.fY[iTime] = cl->GetY(); // register cluster
1632 tseed.fZ[iTime] = cl->GetZ(); // register cluster
1636 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
1637 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
1639 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
1640 TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+
1641 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
1643 if (tquality<squality[bLayer])
1644 bseed[bLayer] = tseed;
1647 chi2 = AliTRDseed::FitRiemanTilt(bseed, kTRUE);
1655 for (Int_t iLayer=0;iLayer<6;iLayer++) {
1656 if (TMath::Abs(cseed[iLayer].fYref[0]/cseed[iLayer].fX0)<0.15)
1658 if (cseed[iLayer].IsOK()){
1659 nclusters+=cseed[iLayer].fN2;
1663 if (nlayers<3) continue;
1665 for (Int_t iLayer=0;iLayer<6;iLayer++){
1666 if (cseed[iLayer].IsOK()) rieman.AddPoint(xcl[iLayer],cseed[iLayer].fYfitR[0],
1667 cseed[iLayer].fZProb,1,10);
1673 for (Int_t iLayer=0;iLayer<6;iLayer++){
1674 if (cseed[iLayer].IsOK()){
1675 cseed[iLayer].fYref[0] = rieman.GetYat(xcl[iLayer]);
1676 chi2RF += (cseed[iLayer].fYref[0]-cseed[iLayer].fYfitR[0])*
1677 (cseed[iLayer].fYref[0]-cseed[iLayer].fYfitR[0]);
1678 cseed[iLayer].fYref[1] = rieman.GetDYat(xcl[iLayer]);
1679 cseed[iLayer].fZref[0] = rieman.GetZat(xcl[iLayer]);
1680 chi2ZF += (cseed[iLayer].fZref[0]- cseed[iLayer].fMeanz)*
1681 (cseed[iLayer].fZref[0]- cseed[iLayer].fMeanz);
1682 cseed[iLayer].fZref[1] = rieman.GetDZat(xcl[iLayer]);
1685 chi2RF/=TMath::Max((nlayers-3.),1.);
1686 chi2ZF/=TMath::Max((nlayers-3.),1.);
1687 curv = rieman.GetC();
1691 Double_t xref2 = (xcl[2]+xcl[3])*0.5; // middle of the chamber
1692 Double_t dzmf = rieman.GetDZat(xref2);
1693 Double_t zmf = rieman.GetZat(xref2);
1698 fitterTC.ClearPoints();
1699 fitterT2.ClearPoints();
1701 for (Int_t iLayer=0; iLayer<6;iLayer++){
1702 if (!cseed[iLayer].IsOK()) continue;
1703 for (Int_t itime=0;itime<25;itime++){
1704 if (!cseed[iLayer].fUsable[itime]) continue;
1705 Double_t x = cseed[iLayer].fX[itime]+cseed[iLayer].fX0-xref2; // x relative to the midle chamber
1706 Double_t y = cseed[iLayer].fY[itime];
1707 Double_t z = cseed[iLayer].fZ[itime];
1708 // ExB correction to the correction
1712 Double_t x2 = cseed[iLayer].fX[itime]+cseed[iLayer].fX0; // global x
1714 Double_t t = 1./(x2*x2+y*y);
1716 uvt[0] = 2.*x2*uvt[1]; // u
1718 uvt[2] = 2.0*hL[iLayer]*uvt[1];
1719 uvt[3] = 2.0*hL[iLayer]*x*uvt[1];
1720 uvt[4] = 2.0*(y+hL[iLayer]*z)*uvt[1];
1722 Double_t error = 2*0.2*uvt[1];
1723 fitterT2.AddPoint(uvt,uvt[4],error);
1725 // constrained rieman
1727 z =cseed[iLayer].fZ[itime];
1728 uvt[0] = 2.*x2*t; // u
1729 uvt[1] = 2*hL[iLayer]*x2*uvt[1];
1730 uvt[2] = 2*(y+hL[iLayer]*(z-GetZ()))*t;
1731 fitterTC.AddPoint(uvt,uvt[2],error);
1733 rieman2.AddPoint(x2,y,z,1,10);
1740 Double_t rpolz0 = fitterT2.GetParameter(3);
1741 Double_t rpolz1 = fitterT2.GetParameter(4);
1743 // linear fitter - not possible to make boundaries
1744 // non accept non possible z and dzdx combination
1746 Bool_t acceptablez =kTRUE;
1747 for (Int_t iLayer=0; iLayer<6;iLayer++){
1748 if (cseed[iLayer].IsOK()){
1749 Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2);
1750 if (TMath::Abs(cseed[iLayer].fZProb-zT2)>padlength[iLayer]*0.5+1)
1751 acceptablez = kFALSE;
1755 fitterT2.FixParameter(3,zmf);
1756 fitterT2.FixParameter(4,dzmf);
1758 fitterT2.ReleaseParameter(3);
1759 fitterT2.ReleaseParameter(4);
1760 rpolz0 = fitterT2.GetParameter(3);
1761 rpolz1 = fitterT2.GetParameter(4);
1764 Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT);
1765 Double_t chi2TC = fitterTC.GetChisquare()/Float_t(npointsT);
1767 Double_t polz1c = fitterTC.GetParameter(2);
1768 Double_t polz0c = polz1c*xref2;
1770 Double_t aC = fitterTC.GetParameter(0);
1771 Double_t bC = fitterTC.GetParameter(1);
1772 Double_t cC = aC/TMath::Sqrt(bC*bC+1.); // curvature
1774 Double_t aR = fitterT2.GetParameter(0);
1775 Double_t bR = fitterT2.GetParameter(1);
1776 Double_t dR = fitterT2.GetParameter(2);
1777 Double_t cR = 1+bR*bR-dR*aR;
1780 dca = -dR/(TMath::Sqrt(1+bR*bR-dR*aR)+TMath::Sqrt(1+bR*bR));
1781 cR = aR/TMath::Sqrt(cR);
1784 Double_t chi2ZT2=0, chi2ZTC=0;
1785 for (Int_t iLayer=0; iLayer<6;iLayer++){
1786 if (cseed[iLayer].IsOK()){
1787 Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2);
1788 Double_t zTC = polz0c+polz1c*(xcl[iLayer] - xref2);
1789 chi2ZT2 += TMath::Abs(cseed[iLayer].fMeanz-zT2);
1790 chi2ZTC += TMath::Abs(cseed[iLayer].fMeanz-zTC);
1793 chi2ZT2/=TMath::Max((nlayers-3.),1.);
1794 chi2ZTC/=TMath::Max((nlayers-3.),1.);
1798 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
1800 for (Int_t iLayer=0;iLayer<6;iLayer++){
1801 if (cseed[iLayer].IsOK())
1802 sumdaf += TMath::Abs((cseed[iLayer].fYfit[1]-cseed[iLayer].fYref[1])/cseed[iLayer].fSigmaY2);
1804 sumdaf /= Float_t (nlayers-2.);
1806 // likelihoods for full track
1808 Double_t likezf = TMath::Exp(-chi2ZF*0.14);
1809 Double_t likechi2C = TMath::Exp(-chi2TC*0.677);
1810 Double_t likechi2TR = TMath::Exp(-chi2TR*0.78);
1811 Double_t likeaf = TMath::Exp(-sumdaf*3.23);
1812 seedquality2[registered] = likezf*likechi2TR*likeaf;
1813 // Bool_t isGold = kFALSE;
1815 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
1816 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
1817 // if (isGold &&nusedf<10){
1818 // for (Int_t jLayer=0;jLayer<6;jLayer++){
1819 // if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
1820 // seed[index][jLayer].UseClusters(); //sign gold
1827 if (!cseed[0].IsOK()){
1829 if (!cseed[1].IsOK()) index0 = 2;
1831 seedparams[registered][0] = cseed[index0].fX0;
1832 seedparams[registered][1] = cseed[index0].fYref[0];
1833 seedparams[registered][2] = cseed[index0].fZref[0];
1834 seedparams[registered][5] = cR;
1835 seedparams[registered][3] = cseed[index0].fX0*cR - TMath::Sin(TMath::ATan(cseed[0].fYref[1]));
1836 seedparams[registered][4] = cseed[index0].fZref[1]/
1837 TMath::Sqrt(1+cseed[index0].fYref[1]*cseed[index0].fYref[1]);
1838 seedparams[registered][6] = ns;
1841 Int_t labels[12], outlab[24];
1843 for (Int_t iLayer=0;iLayer<6;iLayer++){
1844 if (!cseed[iLayer].IsOK()) continue;
1845 if (cseed[iLayer].fLabels[0]>=0) {
1846 labels[nlab] = cseed[iLayer].fLabels[0];
1849 if (cseed[iLayer].fLabels[1]>=0) {
1850 labels[nlab] = cseed[iLayer].fLabels[1];
1854 Freq(nlab,labels,outlab,kFALSE);
1855 Int_t label = outlab[0];
1856 Int_t frequency = outlab[1];
1857 for (Int_t iLayer=0;iLayer<6;iLayer++){
1858 cseed[iLayer].fFreq = frequency;
1859 cseed[iLayer].fC = cR;
1860 cseed[iLayer].fCC = cC;
1861 cseed[iLayer].fChi2 = chi2TR;
1862 cseed[iLayer].fChi2Z = chi2ZF;
1865 if (1||(!isFake)){ //debugging print
1866 Float_t zvertex = GetZ();
1867 TTreeSRedirector& cstream = *fDebugStreamer;
1868 if (AliTRDReconstructor::StreamLevel()>0)
1871 "Vertex="<<zvertex<<
1872 "Rieman2.="<<&rieman2<<
1873 "Rieman.="<<&rieman<<
1883 "Chi2RF="<<chi2RF<< //chi2 of trackletes on full track
1884 "Chi2ZF="<<chi2ZF<< //chi2 z on tracklets on full track
1885 "Chi2ZT2="<<chi2ZT2<< //chi2 z on tracklets on full track - rieman tilt
1886 "Chi2ZTC="<<chi2ZTC<< //chi2 z on tracklets on full track - rieman tilt const
1888 "Chi2TR="<<chi2TR<< //chi2 without vertex constrain
1889 "Chi2TC="<<chi2TC<< //chi2 with vertex constrain
1890 "C="<<curv<< // non constrained - no tilt correction
1891 "DR="<<dR<< // DR parameter - tilt correction
1892 "DCA="<<dca<< // DCA - tilt correction
1893 "CR="<<cR<< // non constrained curvature - tilt correction
1894 "CC="<<cC<< // constrained curvature
1900 "Nlayers="<<nlayers<<
1901 "NUsedS="<<nusedCl<<
1903 "Findable="<<findable<<
1905 "LikePrim="<<likePrim<<
1906 "Likechi2C="<<likechi2C<<
1907 "Likechi2TR="<<likechi2TR<<
1909 "LikeF="<<seedquality2[registered]<<
1916 "SB0.="<<&seedb[0]<<
1917 "SB1.="<<&seedb[1]<<
1918 "SB2.="<<&seedb[2]<<
1919 "SB3.="<<&seedb[3]<<
1920 "SB4.="<<&seedb[4]<<
1921 "SB5.="<<&seedb[5]<<
1923 "Freq="<<frequency<<
1927 if (registered<kMaxSeed-1) {
1929 cseed = seed[registered];
1931 }// end of loop over layer 1
1932 } // end of loop over layer 0
1933 } // end of loop over layer 3
1934 } // end of loop over seeding time bins
1938 TMath::Sort(registered,seedquality2,sort,kTRUE);
1939 Bool_t signedseed[kMaxSeed];
1940 for (Int_t i=0;i<registered;i++){
1941 signedseed[i]= kFALSE;
1943 for (Int_t iter=0; iter<5; iter++){
1944 for (Int_t iseed=0;iseed<registered;iseed++){
1945 Int_t index = sort[iseed];
1946 if (signedseed[index]) continue;
1947 Int_t labelsall[1000];
1950 Int_t sLayer = seedlayer[index];
1955 for (Int_t jLayer=0;jLayer<6;jLayer++){
1956 if (TMath::Abs(seed[index][jLayer].fYref[0]/xcl[jLayer])<0.15)
1958 if (seed[index][jLayer].IsOK()){
1959 seed[index][jLayer].UpdateUsed();
1960 ncl +=seed[index][jLayer].fN2;
1961 nused +=seed[index][jLayer].fNUsed;
1964 for (Int_t itime=0;itime<25;itime++){
1965 if (seed[index][jLayer].fUsable[itime]){
1967 for (Int_t ilab=0;ilab<3;ilab++){
1968 Int_t tindex = seed[index][jLayer].fClusters[itime]->GetLabel(ilab);
1970 labelsall[nlabelsall] = tindex;
1979 if (nused>30) continue;
1982 if (nlayers<6) continue;
1983 if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue; // gold
1987 if (nlayers<findable) continue;
1988 if (TMath::Log(0.000000001+seedquality2[index])<-4.) continue; //
1993 if (nlayers==findable || nlayers==6) continue;
1994 if (TMath::Log(0.000000001+seedquality2[index])<-6.) continue;
1998 if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue;
2002 if (TMath::Log(0.000000001+seedquality2[index])-nused/(nlayers-3.)<-15.) continue;
2005 signedseed[index] = kTRUE;
2007 Int_t labels[1000], outlab[1000];
2009 for (Int_t iLayer=0;iLayer<6;iLayer++){
2010 if (seed[index][iLayer].IsOK()){
2011 if (seed[index][iLayer].fLabels[0]>=0) {
2012 labels[nlab] = seed[index][iLayer].fLabels[0];
2015 if (seed[index][iLayer].fLabels[1]>=0) {
2016 labels[nlab] = seed[index][iLayer].fLabels[1];
2021 Freq(nlab,labels,outlab,kFALSE);
2022 Int_t label = outlab[0];
2023 Int_t frequency = outlab[1];
2024 Freq(nlabelsall,labelsall,outlab,kFALSE);
2025 Int_t label1 = outlab[0];
2026 Int_t label2 = outlab[2];
2027 Float_t fakeratio = (naccepted-outlab[1])/Float_t(naccepted);
2028 Float_t ratio = Float_t(nused)/Float_t(ncl);
2030 for (Int_t jLayer=0;jLayer<6;jLayer++){
2031 if ( seed[index][jLayer].IsOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.2 )
2032 seed[index][jLayer].UseClusters(); //sign gold
2036 Int_t eventNr = esd->GetEventNumber();
2037 TTreeSRedirector& cstream = *fDebugStreamer;
2041 AliTRDtrack * track = RegisterSeed(seed[index],seedparams[index]);
2043 if (!track) track=&dummy;
2045 AliESDtrack esdtrack;
2046 esdtrack.UpdateTrackParams(track, AliESDtrack::kTRDout);
2047 esdtrack.SetLabel(label);
2048 esd->AddTrack(&esdtrack);
2049 TTreeSRedirector& cstream = *fDebugStreamer;
2050 if (AliTRDReconstructor::StreamLevel()>0)
2052 "EventNr="<<eventNr<<
2053 "ESD.="<<&esdtrack<<
2055 "trdback.="<<track<<
2058 if (AliTRDReconstructor::StreamLevel()>0)
2062 "Like="<<seedquality[index]<<
2063 "LikeF="<<seedquality2[index]<<
2064 "S0.="<<&seed[index][0]<<
2065 "S1.="<<&seed[index][1]<<
2066 "S2.="<<&seed[index][2]<<
2067 "S3.="<<&seed[index][3]<<
2068 "S4.="<<&seed[index][4]<<
2069 "S5.="<<&seed[index][5]<<
2073 "FakeRatio="<<fakeratio<<
2074 "Freq="<<frequency<<
2076 "Nlayers="<<nlayers<<
2077 "Findable="<<findable<<
2080 "EventNr="<<eventNr<<
2084 } // end of loop over sectors
2088 //_____________________________________________________________________________
2089 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree) const
2092 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2093 // from the file. The names of the cluster tree and branches
2094 // should match the ones used in AliTRDclusterizer::WriteClusters()
2096 Int_t nsize = Int_t(ClusterTree->GetTotBytes()/(sizeof(AliTRDcluster)));
2097 TObjArray *clusterArray = new TObjArray(nsize+1000);
2099 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2101 Error("ReadClusters","Can't get the branch !");
2104 branch->SetAddress(&clusterArray);
2106 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2107 // printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
2109 // Loop through all entries in the tree
2111 AliTRDcluster *c = 0;
2113 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2116 nbytes += ClusterTree->GetEvent(iEntry);
2118 // Get the number of points in the detector
2119 Int_t nCluster = clusterArray->GetEntriesFast();
2120 // printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2122 // Loop through all TRD digits
2123 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2124 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
2125 AliTRDcluster *co = c;
2127 // delete clusterArray->RemoveAt(iCluster);
2128 clusterArray->RemoveAt(iCluster);
2131 // cout<<"Allocated"<<nsize<<"\tLoaded"<<array->GetEntriesFast()<<"\n";
2133 delete clusterArray;
2138 //__________________________________________________________________
2139 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint& p) const
2142 // Get track space point with index i
2143 // Origin: C.Cheshkov
2146 AliTRDcluster *cl = (AliTRDcluster*)fClusters->UncheckedAt(index);
2147 Int_t idet = cl->GetDetector();
2148 Int_t isector = fGeom->GetSector(idet);
2149 Int_t ichamber= fGeom->GetChamber(idet);
2150 Int_t iplan = fGeom->GetPlane(idet);
2152 local[0]=GetX(isector,iplan,cl->GetLocalTimeBin());
2153 local[1]=cl->GetY();
2154 local[2]=cl->GetZ();
2156 fGeom->RotateBack(idet,local,global);
2157 p.SetXYZ(global[0],global[1],global[2]);
2158 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
2161 iLayer = AliAlignObj::kTRD1;
2164 iLayer = AliAlignObj::kTRD2;
2167 iLayer = AliAlignObj::kTRD3;
2170 iLayer = AliAlignObj::kTRD4;
2173 iLayer = AliAlignObj::kTRD5;
2176 iLayer = AliAlignObj::kTRD6;
2179 Int_t modId = isector*fGeom->Ncham()+ichamber;
2180 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
2181 p.SetVolumeID(volid);
2187 //__________________________________________________________________
2188 void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2191 // This cooks a label. Mmmmh, smells good...
2194 Int_t label=123456789, index, i, j;
2195 Int_t ncl=pt->GetNumberOfClusters();
2196 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
2200 // Int_t s[kRange][2];
2201 Int_t **s = new Int_t* [kRange];
2202 for (i=0; i<kRange; i++) {
2203 s[i] = new Int_t[2];
2205 for (i=0; i<kRange; i++) {
2211 for (i=0; i<ncl; i++) {
2212 index=pt->GetClusterIndex(i);
2213 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2219 for (i=0; i<ncl; i++) {
2220 index=pt->GetClusterIndex(i);
2221 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2222 for (Int_t k=0; k<3; k++) {
2223 label=c->GetLabel(k);
2224 labelAdded=kFALSE; j=0;
2226 while ( (!labelAdded) && ( j < kRange ) ) {
2227 if (s[j][0]==label || s[j][1]==0) {
2241 for (i=0; i<kRange; i++) {
2243 max=s[i][1]; label=s[i][0];
2247 for (i=0; i<kRange; i++) {
2253 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
2255 pt->SetLabel(label);
2260 //__________________________________________________________________
2261 void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2264 // Use clusters, but don't abuse them!
2266 const Float_t kmaxchi2 =18;
2267 const Float_t kmincl =10;
2268 AliTRDtrack * track = (AliTRDtrack*)t;
2270 Int_t ncl=t->GetNumberOfClusters();
2271 for (Int_t i=from; i<ncl; i++) {
2272 Int_t index = t->GetClusterIndex(i);
2273 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2275 Int_t iplane = fGeom->GetPlane(c->GetDetector());
2276 if (track->fTracklets[iplane].GetChi2()>kmaxchi2) continue;
2277 if (track->fTracklets[iplane].GetN()<kmincl) continue;
2278 if (!(c->IsUsed())) c->Use();
2283 //_____________________________________________________________________
2284 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2286 // Parametrised "expected" error of the cluster reconstruction in Y
2288 Double_t s = 0.08 * 0.08;
2292 //_____________________________________________________________________
2293 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2295 // Parametrised "expected" error of the cluster reconstruction in Z
2297 Double_t s = 9 * 9 /12.;
2301 //_____________________________________________________________________
2302 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2305 // Returns radial position which corresponds to time bin <localTB>
2306 // in tracking sector <sector> and plane <plane>
2309 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2310 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2311 return fTrSec[sector]->GetLayer(pl)->GetX();
2316 //_______________________________________________________
2317 AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
2318 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex, Int_t plane)
2321 // AliTRDpropagationLayer constructor
2324 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
2325 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
2328 for(Int_t i=0; i < (Int_t) kZones; i++) {
2329 fZc[i]=0; fZmax[i] = 0;
2334 if(fTimeBinIndex >= 0) {
2335 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2336 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2339 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
2350 //_______________________________________________________
2351 void AliTRDtracker::AliTRDpropagationLayer::SetHole(
2352 Double_t Zmax, Double_t Ymax, Double_t rho,
2353 Double_t radLength, Double_t Yc, Double_t Zc)
2356 // Sets hole in the layer
2364 fHoleX0 = radLength;
2368 //_______________________________________________________
2369 AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs)
2372 // AliTRDtrackingSector Constructor
2374 AliTRDpadPlane *padPlane = 0;
2380 // get holes description from geometry
2381 Bool_t holes[AliTRDgeometry::kNcham];
2382 //printf("sector\t%d\t",gs);
2383 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
2384 holes[icham] = fGeom->IsHole(0,icham,gs);
2385 //printf("%d",holes[icham]);
2389 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
2392 AliTRDpropagationLayer* ppl;
2394 Double_t x, dx, rho, radLength;
2397 // add layers for each of the planes
2398 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2399 //Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2402 const Int_t kNchambers = AliTRDgeometry::Ncham();
2404 Double_t ymaxsensitive=0;
2405 Double_t *zc = new Double_t[kNchambers];
2406 Double_t *zmax = new Double_t[kNchambers];
2407 Double_t *zmaxsensitive = new Double_t[kNchambers];
2409 AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
2412 printf("<AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector> ");
2413 printf("Could not get common params\n");
2417 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
2419 ymax = fGeom->GetChamberWidth(plane)/2.;
2420 // Modidified for new pad plane class, 22.04.05 (C.B.)
2421 padPlane = commonParam->GetPadPlane(plane,0);
2422 ymaxsensitive = (padPlane->GetColSize(1)*padPlane->GetNcols()-4)/2.;
2423 for(Int_t ch = 0; ch < kNchambers; ch++) {
2424 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
2426 // Modidified for new pad plane class, 22.04.05 (C.B.)
2427 Float_t pad = padPlane->GetRowSize(1);
2428 Float_t row0 = commonParam->GetRow0(plane,ch,0);
2429 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
2430 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
2431 zc[ch] = -(pad * nPads)/2 + row0;
2434 dx = AliTRDcalibDB::Instance()->GetVdrift(0,0,0)
2435 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
2436 rho = 0.00295 * 0.85; radLength = 11.0;
2438 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
2439 //Double_t xbottom = x0 - dxDrift;
2440 //Double_t xtop = x0 + dxAmp;
2442 Int_t nTimeBins = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2443 for (Int_t iTime = 0; iTime<nTimeBins; iTime++){
2444 Double_t xlayer = iTime*dx - dxAmp;
2445 //if (xlayer<0) xlayer=dxAmp/2.;
2448 tbIndex = CookTimeBinIndex(plane, iTime);
2449 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex, plane);
2450 ppl->SetYmax(ymax,ymaxsensitive);
2451 ppl->SetZ(zc, zmax, zmaxsensitive);
2452 ppl->SetHoles(holes);
2460 delete [] zmaxsensitive;
2464 //______________________________________________________
2466 Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
2469 // depending on the digitization parameters calculates "global"
2470 // time bin index for timebin <localTB> in plane <plane>
2473 Int_t tbPerPlane = AliTRDcalibDB::Instance()->GetNumberOfTimeBins();
2474 Int_t gtb = (plane+1) * tbPerPlane - localTB -1;
2475 if (localTB<0) return -1;
2476 if (gtb<0) return -1;
2480 //______________________________________________________
2482 void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2485 // For all sensitive time bins sets corresponding layer index
2486 // in the array fTimeBins
2491 for(Int_t i = 0; i < fN; i++) {
2492 index = fLayers[i]->GetTimeBinIndex();
2494 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2496 if(index < 0) continue;
2497 if(index >= (Int_t) kMaxTimeBinIndex) {
2498 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2499 printf(" index %d exceeds allowed maximum of %d!\n",
2500 index, kMaxTimeBinIndex-1);
2503 fTimeBinIndex[index] = i;
2508 //______________________________________________________
2511 Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2514 // Returns the number of time bin which in radial position is closest to <x>
2517 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2518 if(x <= fLayers[0]->GetX()) return 0;
2520 Int_t b=0, e=fN-1, m=(b+e)/2;
2521 for (; b<e; m=(b+e)/2) {
2522 if (x > fLayers[m]->GetX()) b=m+1;
2525 if(TMath::Abs(x - fLayers[m]->GetX()) >
2526 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2531 //______________________________________________________
2533 Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2536 // Returns number of the innermost SENSITIVE propagation layer
2539 return GetLayerNumber(0);
2542 //______________________________________________________
2544 Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2547 // Returns number of the outermost SENSITIVE time bin
2550 return GetLayerNumber(GetNumberOfTimeBins() - 1);
2553 //______________________________________________________
2555 Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2558 // Returns number of SENSITIVE time bins
2562 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
2563 layer = GetLayerNumber(tb);
2569 //______________________________________________________
2571 void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2574 // Insert layer <pl> in fLayers array.
2575 // Layers are sorted according to X coordinate.
2577 if ( fN == ((Int_t) kMaxLayersPerSector)) {
2578 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2581 if (fN==0) {fLayers[fN++] = pl; return;}
2582 Int_t i=Find(pl->GetX());
2584 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2585 fLayers[i]=pl; fN++;
2589 //______________________________________________________
2591 Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2594 // Returns index of the propagation layer nearest to X
2597 if (x <= fLayers[0]->GetX()) return 0;
2598 if (x > fLayers[fN-1]->GetX()) return fN;
2599 Int_t b=0, e=fN-1, m=(b+e)/2;
2600 for (; b<e; m=(b+e)/2) {
2601 if (x > fLayers[m]->GetX()) b=m+1;
2611 //______________________________________________________
2612 void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2615 // set centers and the width of sectors
2616 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2617 fZc[icham] = center[icham];
2618 fZmax[icham] = w[icham];
2619 fZmaxSensitive[icham] = wsensitive[icham];
2620 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2623 //______________________________________________________
2625 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2628 // set centers and the width of sectors
2630 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2631 fIsHole[icham] = holes[icham];
2632 if (holes[icham]) fHole = kTRUE;
2640 //______________________________________________________
2642 void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
2645 // Insert cluster in cluster array.
2646 // Clusters are sorted according to Y coordinate.
2648 if(fTimeBinIndex < 0) {
2649 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
2653 if (fN== (Int_t) kMaxClusterPerTimeBin) {
2654 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
2657 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
2658 Int_t i=Find(c->GetY());
2659 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
2660 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
2661 fIndex[i]=index; fClusters[i]=c; fN++;
2664 //______________________________________________________
2666 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const {
2668 // Returns index of the cluster nearest in Y
2670 if (fN<=0) return 0;
2671 if (y <= fClusters[0]->GetY()) return 0;
2672 if (y > fClusters[fN-1]->GetY()) return fN;
2673 Int_t b=0, e=fN-1, m=(b+e)/2;
2674 for (; b<e; m=(b+e)/2) {
2675 if (y > fClusters[m]->GetY()) b=m+1;
2681 Int_t AliTRDtracker::AliTRDpropagationLayer::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad, Float_t maxroadz) const
2684 // Returns index of the cluster nearest to the given y,z
2688 Float_t mindist = maxroad;
2690 for (Int_t i=Find(y-maxroad); i<maxn; i++) {
2691 AliTRDcluster* c=(AliTRDcluster*)(fClusters[i]);
2692 Float_t ycl = c->GetY();
2694 if (ycl > y+maxroad) break;
2695 if (TMath::Abs(c->GetZ()-z) > maxroadz) continue;
2696 if (TMath::Abs(ycl-y)<mindist){
2697 mindist = TMath::Abs(ycl-y);
2705 //---------------------------------------------------------
2707 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
2709 // Returns correction factor for tilted pads geometry
2711 Int_t det = c->GetDetector();
2712 Int_t plane = fGeom->GetPlane(det);
2713 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
2714 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
2716 if(fNoTilt) h01 = 0;
2721 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack& TRDtrack)
2723 // *** ADDED TO GET MORE INFORMATION FOR TRD PID ---- PS
2724 // This is setting fdEdxPlane and fTimBinPlane
2725 // Sums up the charge in each plane for track TRDtrack and also get the
2726 // Time bin for Max. Cluster
2727 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
2729 Double_t clscharge[kNPlane], maxclscharge[kNPlane];
2730 Int_t nCluster[kNPlane], timebin[kNPlane];
2732 //Initialization of cluster charge per plane.
2733 for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2734 clscharge[iPlane] = 0.0;
2735 nCluster[iPlane] = 0;
2736 timebin[iPlane] = -1;
2737 maxclscharge[iPlane] = 0.0;
2740 // Loop through all clusters associated to track TRDtrack
2741 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
2742 for (Int_t iClus = 0; iClus < nClus; iClus++) {
2743 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
2744 Int_t index = TRDtrack.GetClusterIndex(iClus);
2745 AliTRDcluster *pTRDcluster = (AliTRDcluster *) GetCluster(index);
2746 if (!pTRDcluster) continue;
2747 Int_t tb = pTRDcluster->GetLocalTimeBin();
2749 Int_t detector = pTRDcluster->GetDetector();
2750 Int_t iPlane = fGeom->GetPlane(detector);
2751 clscharge[iPlane] = clscharge[iPlane]+charge;
2752 if(charge > maxclscharge[iPlane]) {
2753 maxclscharge[iPlane] = charge;
2754 timebin[iPlane] = tb;
2757 } // end of loop over cluster
2759 // Setting the fdEdxPlane and fTimBinPlane variabales
2760 Double_t totalCharge = 0;
2761 for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2762 // Quality control of TRD track.
2763 if (nCluster[iPlane]<= 5) {
2764 clscharge[iPlane]=0.0;
2767 if (nCluster[iPlane]) clscharge[iPlane] /= nCluster[iPlane];
2768 TRDtrack.SetPIDsignals(clscharge[iPlane], iPlane);
2769 TRDtrack.SetPIDTimBin(timebin[iPlane], iPlane);
2770 totalCharge= totalCharge+clscharge[iPlane];
2773 // Int_t nc=TRDtrack.GetNumberOfClusters();
2775 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
2777 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
2778 // TRDtrack.SetPIDsignals(dedx, iPlane);
2779 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
2782 } // end of function
2785 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack * track, Int_t *clusters,AliTRDtracklet&tracklet)
2789 // try to find nearest clusters to the track in timebins from t0 to t1
2793 // correction coeficients - depends on TRD parameters - to be changed according it
2796 Double_t x[100],yt[100],zt[100];
2797 Double_t xmean=0; //reference x
2798 Double_t dz[10][100],dy[10][100];
2799 Float_t zmean[100], nmean[100];
2801 Int_t indexes[10][100]; // indexes of the clusters in the road
2802 AliTRDcluster *cl[10][100]; // pointers to the clusters in the road
2803 Int_t best[10][100]; // index of best matching cluster
2807 for (Int_t it=0;it<=t1-t0; it++){
2815 for (Int_t ih=0;ih<10;ih++){
2816 indexes[ih][it]=-2; //reset indexes1
2824 Double_t x0 = track->GetX();
2825 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
2831 Float_t padlength=0;
2832 AliTRDtrack track2(*track);
2833 Float_t snpy = track->GetSnp();
2834 Float_t tany = TMath::Sqrt(snpy*snpy/(1.-snpy*snpy));
2835 if (snpy<0) tany*=-1;
2837 Double_t sy2=ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
2838 Double_t sz2=ExpectedSigmaZ2(x0,track->GetTgl());
2839 Double_t road = 15.*sqrt(track->GetSigmaY2() + sy2);
2840 if (road>6.) road=6.;
2843 for (Int_t it=0;it<t1-t0;it++){
2844 Double_t maxChi2[2]={fgkMaxChi2,fgkMaxChi2};
2845 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(it+t0));
2846 if (timeBin==0) continue; // no indexes1
2847 Int_t maxn = timeBin;
2848 x[it] = timeBin.GetX();
2849 track2.PropagateTo(x[it]);
2850 yt[it] = track2.GetY();
2851 zt[it] = track2.GetZ();
2853 Double_t y=yt[it],z=zt[it];
2854 Double_t chi2 =1000000;
2857 // find 2 nearest cluster at given time bin
2860 for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
2861 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
2862 h01 = GetTiltFactor(c);
2864 Int_t det = c->GetDetector();
2865 plane = fGeom->GetPlane(det);
2866 padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
2868 // if (c->GetLocalTimeBin()==0) continue;
2869 if (c->GetY() > y+road) break;
2870 if((c->GetZ()-z)*(c->GetZ()-z) > 12. * sz2) continue;
2872 Double_t dist = TMath::Abs(c->GetZ()-z);
2873 if (dist> (0.5*padlength+6.*sigmaz)) continue; // 6 sigma boundary cut
2876 if (dist> (0.5*padlength-sigmaz)){ // sigma boundary cost function
2877 cost = (dist-0.5*padlength)/(2.*sigmaz);
2878 if (cost>-1) cost= (cost+1.)*(cost+1.);
2881 // Int_t label = TMath::Abs(track->GetLabel());
2882 // if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
2883 chi2=track2.GetPredictedChi2(c,h01)+cost;
2886 if (chi2 > maxChi2[1]) continue;
2887 detector = c->GetDetector();
2889 for (Int_t ih=2;ih<9; ih++){ //store the clusters in the road
2892 indexes[ih][it] =timeBin.GetIndex(i); // index - 9 - reserved for outliers
2897 if (chi2 <maxChi2[0]){
2898 maxChi2[1] = maxChi2[0];
2900 indexes[1][it] = indexes[0][it];
2901 cl[1][it] = cl[0][it];
2902 indexes[0][it] = timeBin.GetIndex(i);
2908 indexes[1][it] =timeBin.GetIndex(i);
2916 if (nfound<4) return 0;
2917 xmean /=Float_t(nfound); // middle x
2918 track2.PropagateTo(xmean); // propagate track to the center
2920 // choose one of the variants
2926 Double_t sumdy2 = 0;
2936 Double_t moffset[10]; // mean offset
2937 Double_t mean[10]; // mean value
2938 Double_t angle[10]; // angle
2940 Double_t smoffset[10]; // sigma of mean offset
2941 Double_t smean[10]; // sigma of mean value
2942 Double_t sangle[10]; // sigma of angle
2943 Double_t smeanangle[10]; // correlation
2945 Double_t sigmas[10];
2946 Double_t tchi2s[10]; // chi2s for tracklet
2950 for (Int_t it=0;it<t1-t0;it++){
2951 if (!cl[0][it]) continue;
2952 for (Int_t dt=-3;dt<=3;dt++){
2953 if (it+dt<0) continue;
2954 if (it+dt>t1-t0) continue;
2955 if (!cl[0][it+dt]) continue;
2956 zmean[it]+=cl[0][it+dt]->GetZ();
2959 zmean[it]/=nmean[it];
2962 for (Int_t it=0; it<t1-t0;it++){
2964 for (Int_t ih=0;ih<10;ih++){
2967 if (!cl[ih][it]) continue;
2968 Double_t xcluster = cl[ih][it]->GetX();
2969 Double_t ytrack,ztrack;
2970 track2.GetProlongation(xcluster, ytrack, ztrack );
2971 dz[ih][it] = cl[ih][it]->GetZ()- ztrack; // calculate distance from track in z
2972 dy[ih][it] = cl[ih][it]->GetY()+ dz[ih][it]*h01 -ytrack; // in y
2975 if (!cl[0][it]) continue;
2976 if (TMath::Abs(cl[0][it]->GetZ()-zmean[it])> padlength*0.8 &&cl[1][it])
2977 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it])< padlength*0.5){
2982 // iterative choosing of "best path"
2985 Int_t label = TMath::Abs(track->GetLabel());
2988 for (Int_t iter=0;iter<9;iter++){
2991 sumz = 0; sum=0; sumdy=0;sumdy2=0;sumx=0;sumx2=0;sumxy=0;mpads=0; ngood[iter]=0; nbad[iter]=0;
2993 for (Int_t it=0;it<t1-t0;it++){
2994 if (!cl[best[iter][it]][it]) continue;
2995 //calculates pad-row changes
2996 Double_t zbefore= cl[best[iter][it]][it]->GetZ();
2997 Double_t zafter = cl[best[iter][it]][it]->GetZ();
2998 for (Int_t itd = it-1; itd>=0;itd--) {
2999 if (cl[best[iter][itd]][itd]) {
3000 zbefore= cl[best[iter][itd]][itd]->GetZ();
3004 for (Int_t itd = it+1; itd<t1-t0;itd++) {
3005 if (cl[best[iter][itd]][itd]) {
3006 zafter= cl[best[iter][itd]][itd]->GetZ();
3010 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]++;
3012 Double_t dx = x[it]-xmean; // distance to reference x
3013 sumz += cl[best[iter][it]][it]->GetZ();
3015 sumdy += dy[best[iter][it]][it];
3016 sumdy2+= dy[best[iter][it]][it]*dy[best[iter][it]][it];
3019 sumxy += dx*dy[best[iter][it]][it];
3020 mpads += cl[best[iter][it]][it]->GetNPads();
3021 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){
3029 // calculates line parameters
3031 Double_t det = sum*sumx2-sumx*sumx;
3032 angle[iter] = (sum*sumxy-sumx*sumdy)/det;
3033 mean[iter] = (sumx2*sumdy-sumx*sumxy)/det;
3034 meanz[iter] = sumz/sum;
3035 moffset[iter] = sumdy/sum;
3036 mpads /= sum; // mean number of pads
3039 Double_t sigma2 = 0; // normalized residuals - for line fit
3040 Double_t sigma1 = 0; // normalized residuals - constant fit
3042 for (Int_t it=0;it<t1-t0;it++){
3043 if (!cl[best[iter][it]][it]) continue;
3044 Double_t dx = x[it]-xmean;
3045 Double_t ytr = mean[iter]+angle[iter]*dx;
3046 sigma2 += (dy[best[iter][it]][it]-ytr)*(dy[best[iter][it]][it]-ytr);
3047 sigma1 += (dy[best[iter][it]][it]-moffset[iter])*(dy[best[iter][it]][it]-moffset[iter]);
3050 sigma2 /=(sum-2); // normalized residuals
3051 sigma1 /=(sum-1); // normalized residuals
3053 smean[iter] = sigma2*(sumx2/det); // estimated error2 of mean
3054 sangle[iter] = sigma2*(sum/det); // estimated error2 of angle
3055 smeanangle[iter] = sigma2*(-sumx/det); // correlation
3058 sigmas[iter] = TMath::Sqrt(sigma1); //
3059 smoffset[iter]= (sigma1/sum)+0.01*0.01; // sigma of mean offset + unisochronity sigma
3061 // iterative choosing of "better path"
3063 for (Int_t it=0;it<t1-t0;it++){
3064 if (!cl[best[iter][it]][it]) continue;
3066 Double_t sigmatr2 = smoffset[iter]+0.5*tany*tany; //add unisochronity + angular effect contribution
3067 Double_t sweight = 1./sigmatr2+1./track->GetSigmaY2();
3068 Double_t weighty = (moffset[iter]/sigmatr2)/sweight; // weighted mean
3069 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1+track->GetSigmaY2()); //
3070 Double_t mindist=100000;
3072 for (Int_t ih=0;ih<10;ih++){
3073 if (!cl[ih][it]) break;
3074 Double_t dist2 = (dy[ih][it]-weighty)/sigmacl;
3075 dist2*=dist2; //chi2 distance
3081 best[iter+1][it]=ihbest;
3084 // update best hypothesy if better chi2 according tracklet position and angle
3086 Double_t sy2 = smean[iter] + track->GetSigmaY2();
3087 Double_t sa2 = sangle[iter] + track->fCee;
3088 Double_t say = track->fCey;
3089 // Double_t chi20 = mean[bestiter]*mean[bestiter]/sy2+angle[bestiter]*angle[bestiter]/sa2;
3090 // Double_t chi21 = mean[iter]*mean[iter]/sy2+angle[iter]*angle[iter]/sa2;
3092 Double_t detchi = sy2*sa2-say*say;
3093 Double_t invers[3] = {sa2/detchi, sy2/detchi, -say/detchi}; //inverse value of covariance matrix
3095 Double_t chi20 = mean[bestiter]*mean[bestiter]*invers[0]+angle[bestiter]*angle[bestiter]*invers[1]+
3096 2.*mean[bestiter]*angle[bestiter]*invers[2];
3097 Double_t chi21 = mean[iter]*mean[iter]*invers[0]+angle[iter]*angle[iter]*invers[1]+
3098 2*mean[iter]*angle[iter]*invers[2];
3099 tchi2s[iter] =chi21;
3101 if (changes[iter]<=changes[bestiter] && chi21<chi20) {
3108 Double_t sigma2 = sigmas[0]; // choose as sigma from 0 iteration
3109 Short_t maxpos = -1;
3110 Float_t maxcharge = 0;
3111 Short_t maxpos4 = -1;
3112 Float_t maxcharge4 = 0;
3113 Short_t maxpos5 = -1;
3114 Float_t maxcharge5 = 0;
3116 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
3117 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
3119 Double_t exB = AliTRDcalibDB::Instance()->GetOmegaTau(AliTRDcalibDB::Instance()->GetVdrift(0,0,0));
3120 Double_t expectederr = sigma2*sigma2+0.01*0.01;
3121 if (mpads>3.5) expectederr += (mpads-3.5)*0.04;
3122 if (changes[bestiter]>1) expectederr+= changes[bestiter]*0.01;
3123 expectederr+=(0.03*(tany-exB)*(tany-exB))*15;
3124 // if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
3125 //expectederr+=10000;
3126 for (Int_t it=0;it<t1-t0;it++){
3127 if (!cl[best[bestiter][it]][it]) continue;
3128 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // set cluster error
3129 if (!cl[best[bestiter][it]][it]->IsUsed()){
3130 cl[best[bestiter][it]][it]->SetY( cl[best[bestiter][it]][it]->GetY());
3131 // cl[best[bestiter][it]][it]->Use();
3134 // time bins with maximal charge
3135 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){
3136 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3137 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3140 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){
3141 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){
3142 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3143 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3146 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){
3147 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){
3148 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3149 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3153 // time bins with maximal charge
3154 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){
3155 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3156 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3159 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){
3160 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){
3161 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3162 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3165 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){
3166 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){
3167 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
3168 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
3171 clusters[it+t0] = indexes[best[bestiter][it]][it];
3172 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 && cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0] = indexes[best[bestiter][it]][it]; //Test
3175 // set tracklet parameters
3177 Double_t trackleterr2 = smoffset[bestiter]+0.01*0.01;
3178 if (mpads>3.5) trackleterr2 += (mpads-3.5)*0.04;
3179 trackleterr2+= changes[bestiter]*0.01;
3180 trackleterr2*= TMath::Max(14.-nfound,1.);
3181 trackleterr2+= 0.2*(tany-exB)*(tany-exB);
3183 tracklet.Set(xmean, track2.GetY()+moffset[bestiter], meanz[bestiter], track2.GetAlpha(), trackleterr2); //set tracklet parameters
3184 tracklet.SetTilt(h01);
3185 tracklet.SetP0(mean[bestiter]);
3186 tracklet.SetP1(angle[bestiter]);
3187 tracklet.SetN(nfound);
3188 tracklet.SetNCross(changes[bestiter]);
3189 tracklet.SetPlane(plane);
3190 tracklet.SetSigma2(expectederr);
3191 tracklet.SetChi2(tchi2s[bestiter]);
3192 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
3193 track->fTracklets[plane] = tracklet;
3194 track->fNWrong+=nbad[0];
3198 TClonesArray array0("AliTRDcluster");
3199 TClonesArray array1("AliTRDcluster");
3200 array0.ExpandCreateFast(t1-t0+1);
3201 array1.ExpandCreateFast(t1-t0+1);
3202 TTreeSRedirector& cstream = *fDebugStreamer;
3203 AliTRDcluster dummy;
3207 for (Int_t it=0;it<t1-t0;it++){
3208 dy0[it] = dy[0][it];
3209 dyb[it] = dy[best[bestiter][it]][it];
3211 new(array0[it]) AliTRDcluster(*cl[0][it]);
3214 new(array0[it]) AliTRDcluster(dummy);
3216 if(cl[best[bestiter][it]][it]) {
3217 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
3220 new(array1[it]) AliTRDcluster(dummy);
3223 TGraph graph0(t1-t0,x,dy0);
3224 TGraph graph1(t1-t0,x,dyb);
3225 TGraph graphy(t1-t0,x,yt);
3226 TGraph graphz(t1-t0,x,zt);
3229 if (AliTRDReconstructor::StreamLevel()>0)
3230 cstream<<"tracklet"<<
3231 "track.="<<track<< // track parameters
3232 "tany="<<tany<< // tangent of the local track angle
3233 "xmean="<<xmean<< // xmean - reference x of tracklet
3234 "tilt="<<h01<< // tilt angle
3235 "nall="<<nall<< // number of foundable clusters
3236 "nfound="<<nfound<< // number of found clusters
3237 "clfound="<<clfound<< // total number of found clusters in road
3238 "mpads="<<mpads<< // mean number of pads per cluster
3239 "plane="<<plane<< // plane number
3240 "detector="<<detector<< // detector number
3241 "road="<<road<< // the width of the used road
3242 "graph0.="<<&graph0<< // x - y = dy for closest cluster
3243 "graph1.="<<&graph1<< // x - y = dy for second closest cluster
3244 "graphy.="<<&graphy<< // y position of the track
3245 "graphz.="<<&graphz<< // z position of the track
3246 // "fCl.="<<&array0<< // closest cluster
3247 //"fCl2.="<<&array1<< // second closest cluster
3248 "maxpos="<<maxpos<< // maximal charge postion
3249 "maxcharge="<<maxcharge<< // maximal charge
3250 "maxpos4="<<maxpos4<< // maximal charge postion - after bin 4
3251 "maxcharge4="<<maxcharge4<< // maximal charge - after bin 4
3252 "maxpos5="<<maxpos5<< // maximal charge postion - after bin 5
3253 "maxcharge5="<<maxcharge5<< // maximal charge - after bin 5
3255 "bestiter="<<bestiter<< // best iteration number
3256 "tracklet.="<<&tracklet<< // corrspond to the best iteration
3257 "tchi20="<<tchi2s[0]<< // chi2 of cluster in the 0 iteration
3258 "tchi2b="<<tchi2s[bestiter]<< // chi2 of cluster in the best iteration
3259 "sigmas0="<<sigmas[0]<< // residuals sigma
3260 "sigmasb="<<sigmas[bestiter]<< // residulas sigma
3262 "ngood0="<<ngood[0]<< // number of good clusters in 0 iteration
3263 "nbad0="<<nbad[0]<< // number of bad clusters in 0 iteration
3264 "ngoodb="<<ngood[bestiter]<< // in best iteration
3265 "nbadb="<<nbad[bestiter]<< // in best iteration
3267 "changes0="<<changes[0]<< // changes of pardrows in iteration number 0
3268 "changesb="<<changes[bestiter]<< // changes of pardrows in best iteration
3270 "moffset0="<<moffset[0]<< // offset fixing angle in iter=0
3271 "smoffset0="<<smoffset[0]<< // sigma of offset fixing angle in iter=0
3272 "moffsetb="<<moffset[bestiter]<< // offset fixing angle in iter=best
3273 "smoffsetb="<<smoffset[bestiter]<< // sigma of offset fixing angle in iter=best
3275 "mean0="<<mean[0]<< // mean dy in iter=0;
3276 "smean0="<<smean[0]<< // sigma of mean dy in iter=0
3277 "meanb="<<mean[bestiter]<< // mean dy in iter=best
3278 "smeanb="<<smean[bestiter]<< // sigma of mean dy in iter=best
3280 "angle0="<<angle[0]<< // angle deviation in the iteration number 0
3281 "sangle0="<<sangle[0]<< // sigma of angular deviation in iteration number 0
3282 "angleb="<<angle[bestiter]<< // angle deviation in the best iteration
3283 "sangleb="<<sangle[bestiter]<< // sigma of angle deviation in the best iteration
3285 "expectederr="<<expectederr<< // expected error of cluster position
3293 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down)
3296 // Sort eleements according occurancy
3297 // The size of output array has is 2*n
3299 Int_t * sindexS = new Int_t[n]; // temp array for sorting
3300 Int_t * sindexF = new Int_t[2*n];
3301 for (Int_t i=0;i<n;i++) sindexF[i]=0;
3303 TMath::Sort(n,inlist, sindexS, down);
3304 Int_t last = inlist[sindexS[0]];
3307 sindexF[0+n] = last;
3311 for(Int_t i=1;i<n; i++){
3312 val = inlist[sindexS[i]];
3313 if (last == val) sindexF[countPos]++;
3316 sindexF[countPos+n] = val;
3317 sindexF[countPos]++;
3321 if (last==val) countPos++;
3322 // sort according frequency
3323 TMath::Sort(countPos, sindexF, sindexS, kTRUE);
3324 for (Int_t i=0;i<countPos;i++){
3325 outlist[2*i ] = sindexF[sindexS[i]+n];
3326 outlist[2*i+1] = sindexF[sindexS[i]];
3334 AliTRDtrack * AliTRDtracker::RegisterSeed(AliTRDseed * seeds, Double_t * params)
3339 Double_t alpha=AliTRDgeometry::GetAlpha();
3340 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
3343 c[1] = 0 ; c[2] = 2;
3344 c[3] = 0 ; c[4] = 0; c[5] = 0.02;
3345 c[6] = 0 ; c[7] = 0; c[8] = 0; c[9] = 0.1;
3346 c[10] = 0 ; c[11] = 0; c[12] = 0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
3349 AliTRDcluster *cl =0;
3350 for (Int_t ilayer=0;ilayer<6;ilayer++){
3351 if (seeds[ilayer].IsOK()){
3352 for (Int_t itime=22;itime>0;itime--){
3353 if (seeds[ilayer].fIndexes[itime]>0){
3354 index = seeds[ilayer].fIndexes[itime];
3355 cl = seeds[ilayer].fClusters[itime];
3362 if (cl==0) return 0;
3363 AliTRDtrack * track = new AliTRDtrack(cl,index,¶ms[1],c, params[0],params[6]*alpha+shift);
3364 track->PropagateTo(params[0]-5.);
3365 track->ResetCovariance(1);
3367 Int_t rc=FollowBackProlongation(*track);
3373 CookdEdxTimBin(*track);
3374 CookLabel(track, 0.9);
3384 AliTRDseed::AliTRDseed()
3388 fTilt =0; // tilting angle
3389 fPadLength = 0; // pad length
3390 fX0 = 0; // x0 position
3391 for (Int_t i=0;i<25;i++){
3392 fX[i]=0; // !x position
3393 fY[i]=0; // !y position
3394 fZ[i]=0; // !z position
3395 fIndexes[i]=0; // !indexes
3396 fClusters[i]=0; // !clusters
3398 for (Int_t i=0;i<2;i++){
3399 fYref[i]=0; // reference y
3400 fZref[i]=0; // reference z
3401 fYfit[i]=0; // y fit position +derivation
3402 fYfitR[i]=0; // y fit position +derivation
3403 fZfit[i]=0; // z fit position
3404 fZfitR[i]=0; // z fit position
3405 fLabels[i]=0; // labels
3409 fMeanz=0; // mean vaue of z
3410 fZProb=0; // max probbable z
3413 fN=0; // number of associated clusters
3414 fN2=0; // number of not crossed
3415 fNUsed=0; // number of used clusters
3416 fNChange=0; // change z counter
3419 void AliTRDseed::Reset(){
3423 for (Int_t i=0;i<25;i++){
3424 fX[i]=0; // !x position
3425 fY[i]=0; // !y position
3426 fZ[i]=0; // !z position
3427 fIndexes[i]=0; // !indexes
3428 fClusters[i]=0; // !clusters
3429 fUsable[i] = kFALSE;
3431 for (Int_t i=0;i<2;i++){
3432 fYref[i]=0; // reference y
3433 fZref[i]=0; // reference z
3434 fYfit[i]=0; // y fit position +derivation
3435 fYfitR[i]=0; // y fit position +derivation
3436 fZfit[i]=0; // z fit position
3437 fZfitR[i]=0; // z fit position
3438 fLabels[i]=-1; // labels
3440 fSigmaY =0; //"robust" sigma in y
3441 fSigmaY2=0; //"robust" sigma in y
3442 fMeanz =0; // mean vaue of z
3443 fZProb =0; // max probbable z
3446 fN=0; // number of associated clusters
3447 fN2=0; // number of not crossed
3448 fNUsed=0; // number of used clusters
3449 fNChange=0; // change z counter
3452 void AliTRDseed::CookLabels(){
3454 // cook 2 labels for seed
3459 for (Int_t i=0;i<25;i++){
3460 if (!fClusters[i]) continue;
3461 for (Int_t ilab=0;ilab<3;ilab++){
3462 if (fClusters[i]->GetLabel(ilab)>=0){
3463 labels[nlab] = fClusters[i]->GetLabel(ilab);
3468 Int_t nlab2 = AliTRDtracker::Freq(nlab,labels,out,kTRUE);
3469 fLabels[0] = out[0];
3470 if (nlab2>1 && out[3]>1) fLabels[1] =out[2];
3473 void AliTRDseed::UseClusters()
3478 for (Int_t i=0;i<25;i++){
3479 if (!fClusters[i]) continue;
3480 if (!(fClusters[i]->IsUsed())) fClusters[i]->Use();
3485 void AliTRDseed::Update(){
3489 const Float_t kRatio = 0.8;
3490 const Int_t kClmin = 6;
3491 const Float_t kmaxtan = 2;
3492 if (TMath::Abs(fYref[1])>kmaxtan) return; // too much inclined track
3494 Float_t sigmaexp = 0.05+TMath::Abs(fYref[1]*0.25); // expected r.m.s in y direction
3495 Float_t ycrosscor = fPadLength*fTilt*0.5; // y correction for crossing
3498 Double_t sumw, sumwx,sumwx2;
3499 Double_t sumwy, sumwxy, sumwz,sumwxz;
3500 Int_t zints[25]; // histograming of the z coordinate - get 1 and second max probable coodinates in z
3502 Float_t allowedz[25]; // allowed z for given time bin
3503 Float_t yres[25]; // residuals from reference
3504 Float_t anglecor = fTilt*fZref[1]; //correction to the angle
3508 for (Int_t i=0;i<25;i++){
3510 if (!fClusters[i]) continue;
3511 yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y
3512 zints[fN] = Int_t(fZ[i]);
3515 if (fN<kClmin) return;
3516 Int_t nz = AliTRDtracker::Freq(fN,zints,zouts,kFALSE);
3518 if (nz<=1) zouts[3]=0;
3519 if (zouts[1]+zouts[3]<kClmin) return;
3521 if (TMath::Abs(zouts[0]-zouts[2])>12.) zouts[3]=0; // z distance bigger than pad - length
3523 Int_t breaktime = -1;
3524 Bool_t mbefore = kFALSE;
3526 Int_t counts[2]={0,0};
3530 // find the break time allowing one chage on pad-rows with maximal numebr of accepted clusters
3533 for (Int_t i=0;i<25;i++){
3534 cumul[i][0] = counts[0];
3535 cumul[i][1] = counts[1];
3536 if (TMath::Abs(fZ[i]-zouts[0])<2) counts[0]++;
3537 if (TMath::Abs(fZ[i]-zouts[2])<2) counts[1]++;
3540 for (Int_t i=0;i<24;i++) {
3541 Int_t after = cumul[24][0]-cumul[i][0];
3542 Int_t before = cumul[i][1];
3543 if (after+before>maxcount) {
3544 maxcount=after+before;
3548 after = cumul[24][1]-cumul[i][1];
3549 before = cumul[i][0];
3550 if (after+before>maxcount) {
3551 maxcount=after+before;
3558 for (Int_t i=0;i<25;i++){
3559 if (i>breaktime) allowedz[i] = mbefore ? zouts[2]:zouts[0];
3560 if (i<=breaktime) allowedz[i] = (!mbefore) ? zouts[2]:zouts[0];
3562 if ( (allowedz[0]>allowedz[24] && fZref[1]<0) || (allowedz[0]<allowedz[24] && fZref[1]>0)){
3564 // tracklet z-direction not in correspondance with track z direction
3567 for (Int_t i=0;i<25;i++){
3568 allowedz[i] = zouts[0]; //only longest taken
3574 // cross pad -row tracklet - take the step change into account
3576 for (Int_t i=0;i<25;i++){
3577 if (!fClusters[i]) continue;
3578 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3579 yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y
3580 if (TMath::Abs(fZ[i]-fZProb)>2){
3581 if (fZ[i]>fZProb) yres[i]+=fTilt*fPadLength;
3582 if (fZ[i]<fZProb) yres[i]-=fTilt*fPadLength;
3588 Double_t mean,sigma;
3589 for (Int_t i=0;i<25;i++){
3590 if (!fClusters[i]) continue;
3591 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3592 yres2[fN2] = yres[i];
3599 EvaluateUni(fN2,yres2,mean,sigma,Int_t(fN2*kRatio-2));
3600 if (sigma<sigmaexp*0.8) sigma=sigmaexp;
3605 sumw=0; sumwx=0; sumwx2=0;
3606 sumwy=0; sumwxy=0; sumwz=0;sumwxz=0;
3611 for (Int_t i=0;i<25;i++){
3613 if (!fClusters[i]) continue;
3614 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
3615 if (TMath::Abs(yres[i]-mean)>4.*sigma) continue;
3618 fMPads+=fClusters[i]->GetNPads();
3620 if (fClusters[i]->GetNPads()>4) weight=0.5;
3621 if (fClusters[i]->GetNPads()>5) weight=0.2;
3624 sumw+=weight; sumwx+=x*weight; sumwx2+=x*x*weight;
3625 sumwy+=weight*yres[i]; sumwxy+=weight*(yres[i])*x;
3626 sumwz+=weight*fZ[i]; sumwxz+=weight*fZ[i]*x;
3632 fMeanz = sumwz/sumw;
3633 Float_t correction =0;
3635 // tracklet on boundary
3636 if (fMeanz<fZProb) correction = ycrosscor;
3637 if (fMeanz>fZProb) correction = -ycrosscor;
3639 Double_t det = sumw*sumwx2-sumwx*sumwx;
3640 fYfitR[0] = (sumwx2*sumwy-sumwx*sumwxy)/det;
3641 fYfitR[1] = (sumw*sumwxy-sumwx*sumwy)/det;
3644 for (Int_t i=0;i<25;i++){
3645 if (!fUsable[i]) continue;
3646 Float_t delta = yres[i]-fYfitR[0]-fYfitR[1]*fX[i];
3647 fSigmaY2+=delta*delta;
3649 fSigmaY2 = TMath::Sqrt(fSigmaY2/Float_t(fN2-2));
3651 fZfitR[0] = (sumwx2*sumwz-sumwx*sumwxz)/det;
3652 fZfitR[1] = (sumw*sumwxz-sumwx*sumwz)/det;
3653 fZfit[0] = (sumwx2*sumwz-sumwx*sumwxz)/det;
3654 fZfit[1] = (sumw*sumwxz-sumwx*sumwz)/det;
3655 fYfitR[0] += fYref[0]+correction;
3656 fYfitR[1] += fYref[1];
3657 fYfit[0] = fYfitR[0];
3658 fYfit[1] = fYfitR[1];
3669 void AliTRDseed::UpdateUsed(){
3672 for (Int_t i=0;i<25;i++){
3673 if (!fClusters[i]) continue;
3674 if ((fClusters[i]->IsUsed())) fNUsed++;
3679 void AliTRDseed::EvaluateUni(Int_t nvectors, Double_t *data, Double_t &mean, Double_t &sigma, Int_t hh)
3682 // robust estimator in 1D case MI version
3684 //for the univariate case
3685 //estimates of location and scatter are returned in mean and sigma parameters
3686 //the algorithm works on the same principle as in multivariate case -
3687 //it finds a subset of size hh with smallest sigma, and then returns mean and
3688 //sigma of this subset
3692 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};
3693 Int_t *index=new Int_t[nvectors];
3694 TMath::Sort(nvectors, data, index, kFALSE);
3696 Int_t nquant = TMath::Min(Int_t(Double_t(((hh*1./nvectors)-0.5)*40))+1, 11);
3697 Double_t factor = faclts[nquant-1];
3702 Int_t bestindex = -1;
3703 Double_t bestmean = 0;
3704 Double_t bestsigma = data[index[nvectors-1]]-data[index[0]]; // maximal possible sigma
3705 for (Int_t i=0; i<hh; i++){
3706 sumx += data[index[i]];
3707 sumx2 += data[index[i]]*data[index[i]];
3710 Double_t norm = 1./Double_t(hh);
3711 Double_t norm2 = 1./Double_t(hh-1);
3712 for (Int_t i=hh; i<nvectors; i++){
3713 Double_t cmean = sumx*norm;
3714 Double_t csigma = (sumx2 - hh*cmean*cmean)*norm2;
3715 if (csigma<bestsigma){
3722 sumx += data[index[i]]-data[index[i-hh]];
3723 sumx2 += data[index[i]]*data[index[i]]-data[index[i-hh]]*data[index[i-hh]];
3726 Double_t bstd=factor*TMath::Sqrt(TMath::Abs(bestsigma));
3733 Float_t AliTRDseed::FitRiemanTilt(AliTRDseed * cseed, Bool_t terror){
3737 TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed
3738 fitterT2.StoreData(kTRUE);
3739 Float_t xref2 = (cseed[2].fX0+cseed[3].fX0)*0.5; // reference x0 for z
3742 fitterT2.ClearPoints();
3743 for (Int_t iLayer=0; iLayer<6;iLayer++){
3744 if (!cseed[iLayer].IsOK()) continue;
3745 Double_t tilt = cseed[iLayer].fTilt;
3747 for (Int_t itime=0;itime<25;itime++){
3748 if (!cseed[iLayer].fUsable[itime]) continue;
3749 Double_t x = cseed[iLayer].fX[itime]+cseed[iLayer].fX0-xref2; // x relative to the midle chamber
3750 Double_t y = cseed[iLayer].fY[itime];
3751 Double_t z = cseed[iLayer].fZ[itime];
3755 Double_t x2 = cseed[iLayer].fX[itime]+cseed[iLayer].fX0; // global x
3756 Double_t t = 1./(x2*x2+y*y);
3758 uvt[0] = 2.*x2*uvt[1]; // u
3759 uvt[2] = 2.0*tilt*uvt[1];
3760 uvt[3] = 2.0*tilt*x*uvt[1];
3761 uvt[4] = 2.0*(y+tilt*z)*uvt[1];
3763 Double_t error = 2*uvt[1];
3764 if (terror) error*=cseed[iLayer].fSigmaY;
3765 else {error *=0.2;} //default error
3766 fitterT2.AddPoint(uvt,uvt[4],error);
3771 Double_t rpolz0 = fitterT2.GetParameter(3);
3772 Double_t rpolz1 = fitterT2.GetParameter(4);
3774 // linear fitter - not possible to make boundaries
3775 // non accept non possible z and dzdx combination
3777 Bool_t acceptablez =kTRUE;
3778 for (Int_t iLayer=0; iLayer<6;iLayer++){
3779 if (cseed[iLayer].IsOK()){
3780 Double_t zT2 = rpolz0+rpolz1*(cseed[iLayer].fX0 - xref2);
3781 if (TMath::Abs(cseed[iLayer].fZProb-zT2)>cseed[iLayer].fPadLength*0.5+1)
3782 acceptablez = kFALSE;
3786 Double_t zmf = cseed[2].fZref[0]+cseed[2].fZref[1]*(xref2-cseed[2].fX0);
3787 Double_t dzmf = (cseed[2].fZref[1]+ cseed[3].fZref[1])*0.5;
3788 fitterT2.FixParameter(3,zmf);
3789 fitterT2.FixParameter(4,dzmf);
3791 fitterT2.ReleaseParameter(3);
3792 fitterT2.ReleaseParameter(4);
3793 rpolz0 = fitterT2.GetParameter(3);
3794 rpolz1 = fitterT2.GetParameter(4);
3797 Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT);
3799 params[0] = fitterT2.GetParameter(0);
3800 params[1] = fitterT2.GetParameter(1);
3801 params[2] = fitterT2.GetParameter(2);
3802 Double_t curvature = 1+params[1]*params[1]-params[2]*params[0];
3803 for (Int_t iLayer = 0; iLayer<6;iLayer++){
3804 Double_t x = cseed[iLayer].fX0;
3805 Double_t y=0,dy=0, z=0, dz=0;
3807 Double_t res2 = (x*params[0]+params[1]);
3809 res2 = 1.-params[2]*params[0]+params[1]*params[1]-res2;
3811 res2 = TMath::Sqrt(res2);
3812 y = (1-res2)/params[0];
3815 Double_t x0 = -params[1]/params[0];
3816 if (-params[2]*params[0]+params[1]*params[1]+1>0){
3817 Double_t rm1 = params[0]/TMath::Sqrt(-params[2]*params[0]+params[1]*params[1]+1);
3818 if ( 1./(rm1*rm1)-(x-x0)*(x-x0)>0){
3819 Double_t res = (x-x0)/TMath::Sqrt(1./(rm1*rm1)-(x-x0)*(x-x0));
3820 if (params[0]<0) res*=-1.;
3824 z = rpolz0+rpolz1*(x-xref2);
3826 cseed[iLayer].fYref[0] = y;
3827 cseed[iLayer].fYref[1] = dy;
3828 cseed[iLayer].fZref[0] = z;
3829 cseed[iLayer].fZref[1] = dz;
3830 cseed[iLayer].fC = curvature;