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 //
22 ///////////////////////////////////////////////////////////////////////////////
24 #include <Riostream.h>
28 #include <TObjArray.h>
30 #include "AliTRDgeometry.h"
31 #include "AliTRDparameter.h"
32 #include "AliTRDgeometryDetail.h"
33 #include "AliTRDgeometryHole.h"
34 #include "AliTRDcluster.h"
35 #include "AliTRDtrack.h"
36 #include "AliTRDPartID.h"
37 #include "../TPC/AliTPCtrack.h"
39 #include "AliTRDtracker.h"
41 ClassImp(AliTRDtracker)
43 const Float_t AliTRDtracker::fgkSeedDepth = 0.5;
44 const Float_t AliTRDtracker::fgkSeedStep = 0.10;
45 const Float_t AliTRDtracker::fgkSeedGap = 0.25;
47 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ12 = 40.;
48 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ = 25.;
49 const Float_t AliTRDtracker::fgkMaxSeedC = 0.0052;
50 const Float_t AliTRDtracker::fgkMaxSeedTan = 1.2;
51 const Float_t AliTRDtracker::fgkMaxSeedVertexZ = 150.;
53 const Double_t AliTRDtracker::fgkSeedErrorSY = 0.2;
54 const Double_t AliTRDtracker::fgkSeedErrorSY3 = 2.5;
55 const Double_t AliTRDtracker::fgkSeedErrorSZ = 0.1;
57 const Float_t AliTRDtracker::fgkMinClustersInSeed = 0.7;
59 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
60 const Float_t AliTRDtracker::fgkMinFractionOfFoundClusters = 0.8;
62 const Float_t AliTRDtracker::fgkSkipDepth = 0.3;
63 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
64 const Float_t AliTRDtracker::fgkWideRoad = 20.;
66 const Double_t AliTRDtracker::fgkMaxChi2 = 12.;
68 const Int_t AliTRDtracker::fgkFirstPlane = 5;
69 const Int_t AliTRDtracker::fgkLastPlane = 17;
72 //____________________________________________________________________
73 AliTRDtracker::AliTRDtracker():AliTracker(),
90 for(Int_t i=0;i<kTrackingSectors;i++) fTrSec[i]=0;
91 for(Int_t j=0;j<5;j++)
92 for(Int_t k=0;k<18;k++) fHoles[j][k]=kFALSE;
94 //____________________________________________________________________
95 AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker()
101 //Float_t fTzero = 0;
103 fAddTRDseeds = kFALSE;
107 TDirectory *savedir=gDirectory;
108 TFile *in=(TFile*)geomfile;
110 printf("AliTRDtracker::AliTRDtracker(): geometry file is not open!\n");
111 printf(" DETAIL TRD geometry and DEFAULT TRD parameter will be used\n");
116 fGeom = (AliTRDgeometry*) in->Get("TRDgeometry");
117 fPar = (AliTRDparameter*) in->Get("TRDparameter");
122 // fTzero = geo->GetT0();
123 printf("Found geometry version %d on file \n", fGeom->IsVersion());
126 printf("AliTRDtracker::AliTRDtracker(): can't find TRD geometry!\n");
127 //printf("The DETAIL TRD geometry will be used\n");
128 //fGeom = new AliTRDgeometryDetail();
129 fGeom = new AliTRDgeometryHole();
130 fGeom->SetPHOShole();
131 fGeom->SetRICHhole();
135 printf("AliTRDtracker::AliTRDtracker(): can't find TRD parameter!\n");
136 printf("The DEFAULT TRD parameter will be used\n");
137 fPar = new AliTRDparameter();
144 // fGeom->SetT0(fTzero);
147 fClusters = new TObjArray(2000);
149 fSeeds = new TObjArray(2000);
151 fTracks = new TObjArray(1000);
153 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
154 Int_t trS = CookSectorIndex(geomS);
155 fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS, fPar);
156 for (Int_t icham=0;icham<AliTRDgeometry::kNcham; icham++){
157 fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS);
161 Float_t tiltAngle = TMath::Abs(fPar->GetTiltingAngle());
162 if(tiltAngle < 0.1) {
169 if(fNoTilt && (tiltAngle > 0.1)) fSY2corr = fSY2corr + tiltAngle * 0.05;
172 // calculate max gap on track
174 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
175 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
177 Double_t dx = (Double_t) fPar->GetTimeBinSize();
178 Int_t tbAmp = fPar->GetTimeBefore();
179 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
180 if(kTRUE) maxAmp = 0; // intentional until we change the parameter class
181 Int_t tbDrift = fPar->GetTimeMax();
182 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
184 tbDrift = TMath::Min(tbDrift,maxDrift);
185 tbAmp = TMath::Min(tbAmp,maxAmp);
187 fTimeBinsPerPlane = tbAmp + tbDrift;
188 fMaxGap = (Int_t) (fTimeBinsPerPlane * fGeom->Nplan() * fgkSkipDepth);
193 // Barrel Tracks [SR, 03.04.2003]
203 //___________________________________________________________________
204 AliTRDtracker::~AliTRDtracker()
207 // Destructor of AliTRDtracker
225 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
226 delete fTrSec[geomS];
230 //_____________________________________________________________________
232 void AliTRDtracker::SetBarrelTree(const char *mode) {
237 if (!IsStoringBarrel()) return;
239 TDirectory *sav = gDirectory;
240 if (!fBarrelFile) fBarrelFile = new TFile("AliBarrelTracks.root", "UPDATE");
243 sprintf(buff, "BarrelTRD_%d_%s", GetEventNumber(), mode);
246 fBarrelTree = new TTree(buff, "Barrel TPC tracks");
248 Int_t nRefs = fgkLastPlane - fgkFirstPlane + 1;
250 if (!fBarrelArray) fBarrelArray = new TClonesArray("AliBarrelTrack", nRefs);
251 for(Int_t i=0; i<nRefs; i++) new((*fBarrelArray)[i]) AliBarrelTrack();
253 fBarrelTree->Branch("tracks", &fBarrelArray);
257 //_____________________________________________________________________
259 void AliTRDtracker::StoreBarrelTrack(AliTRDtrack *ps, Int_t refPlane, Int_t isIn) {
264 if (!IsStoringBarrel()) return;
266 static Int_t nClusters;
268 static Double_t chi2;
270 static Bool_t wasLast = kTRUE;
272 Int_t newClusters, newWrong;
277 fBarrelArray->Clear();
278 nClusters = nWrong = 0;
284 fBarrelTrack = (AliBarrelTrack*)(*fBarrelArray)[index++];
285 ps->GetBarrelTrack(fBarrelTrack);
287 newClusters = ps->GetNumberOfClusters() - nClusters;
288 newWrong = ps->GetNWrong() - nWrong;
289 newChi2 = ps->GetChi2() - chi2;
291 nClusters = ps->GetNumberOfClusters();
292 nWrong = ps->GetNWrong();
293 chi2 = ps->GetChi2();
295 if (refPlane != fgkLastPlane) {
296 fBarrelTrack->SetNClusters(newClusters, newChi2);
297 fBarrelTrack->SetNWrongClusters(newWrong);
302 fBarrelTrack->SetRefPlane(refPlane, isIn);
305 //_____________________________________________________________________
307 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track) {
309 // Rotates the track when necessary
312 Double_t alpha = AliTRDgeometry::GetAlpha();
313 Double_t y = track->GetY();
314 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
316 //Int_t ns = AliTRDgeometry::kNsect;
317 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
321 if (!track->Rotate(alpha)) return kFALSE;
322 } else if (y <-ymax) {
324 if (!track->Rotate(-alpha)) return kFALSE;
330 //_____________________________________________________________________
331 inline Double_t f1trd(Double_t x1,Double_t y1,
332 Double_t x2,Double_t y2,
333 Double_t x3,Double_t y3)
336 // Initial approximation of the track curvature
338 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
339 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
340 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
341 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
342 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
344 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
346 return -xr*yr/sqrt(xr*xr+yr*yr);
349 //_____________________________________________________________________
350 inline Double_t f2trd(Double_t x1,Double_t y1,
351 Double_t x2,Double_t y2,
352 Double_t x3,Double_t y3)
355 // Initial approximation of the track curvature times X coordinate
356 // of the center of curvature
359 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
360 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
361 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
362 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
363 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
365 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
367 return -a/(d*y1-b)*xr/sqrt(xr*xr+yr*yr);
370 //_____________________________________________________________________
371 inline Double_t f3trd(Double_t x1,Double_t y1,
372 Double_t x2,Double_t y2,
373 Double_t z1,Double_t z2)
376 // Initial approximation of the tangent of the track dip angle
379 return (z1 - z2)/sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
383 AliTRDcluster * AliTRDtracker::GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin){
385 //try to find cluster in the backup list
387 AliTRDcluster * cl =0;
388 UInt_t *indexes = track->GetBackupIndexes();
389 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
390 if (indexes[i]==0) break;
391 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
393 if (cli->GetLocalTimeBin()!=timebin) continue;
394 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
404 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * track){
406 //return last updated plane
408 UInt_t *indexes = track->GetBackupIndexes();
409 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
410 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
412 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
413 if (iplane>lastplane) {
419 //___________________________________________________________________
420 Int_t AliTRDtracker::Clusters2Tracks(const TFile *inp, TFile *out)
423 // Finds tracks within the TRD. File <inp> is expected to contain seeds
424 // at the outer part of the TRD. If <inp> is NULL, the seeds
425 // are found within the TRD if fAddTRDseeds is TRUE.
426 // The tracks are propagated to the innermost time bin
427 // of the TRD and stored in file <out>.
432 TDirectory *savedir=gDirectory;
436 if (!out->IsOpen()) {
437 cerr<<"AliTRDtracker::Clusters2Tracks(): output file is not open !\n";
441 sprintf(tname,"seedTRDtoTPC_%d",GetEventNumber());
442 TTree tpcTree(tname,"Tree with seeds from TRD at outer TPC pad row");
443 AliTPCtrack *iotrack=0;
444 tpcTree.Branch("tracks","AliTPCtrack",&iotrack,32000,0);
446 sprintf(tname,"TreeT%d_TRD",GetEventNumber());
447 TTree trdTree(tname,"TRD tracks at inner TRD time bin");
448 AliTRDtrack *iotrackTRD=0;
449 trdTree.Branch("tracks","AliTRDtrack",&iotrackTRD,32000,0);
451 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
452 Float_t foundMin = fgkMinClustersInTrack * timeBins;
455 TFile *in=(TFile*)inp;
458 "AliTRDtracker::Clusters2Tracks(): file with seeds is not open !\n";
459 cerr<<" ... going for seeds finding inside the TRD\n";
463 sprintf(tname,"TRDb_%d",GetEventNumber());
464 TTree *seedTree=(TTree*)in->Get(tname);
466 cerr<<"AliTRDtracker::Clusters2Tracks(): ";
467 cerr<<"can't get a tree with track seeds !\n";
470 AliTRDtrack *seed=new AliTRDtrack;
471 seedTree->SetBranchAddress("tracks",&seed);
473 Int_t n=(Int_t)seedTree->GetEntries();
474 for (Int_t i=0; i<n; i++) {
475 seedTree->GetEvent(i);
476 seed->ResetCovariance();
477 AliTRDtrack *tr = new AliTRDtrack(*seed,seed->GetAlpha());
489 // find tracks from loaded seeds
491 Int_t nseed=fSeeds->GetEntriesFast();
493 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
495 for (i=0; i<nseed; i++) {
496 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
497 FollowProlongation(t, innerTB);
498 if (t.GetNumberOfClusters() >= foundMin) {
500 CookLabel(pt, 1-fgkLabelFraction);
506 // cout<<found<<'\r';
508 if(PropagateToTPC(t)) {
509 AliTPCtrack *tpc = new AliTPCtrack(*pt,pt->GetAlpha());
514 delete fSeeds->RemoveAt(i);
518 cout<<"Number of loaded seeds: "<<nseed<<endl;
519 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
521 // after tracks from loaded seeds are found and the corresponding
522 // clusters are used, look for additional seeds from TRD
525 // Find tracks for the seeds in the TRD
526 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
528 Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
529 Int_t gap = (Int_t) (timeBins * fgkSeedGap);
530 Int_t step = (Int_t) (timeBins * fgkSeedStep);
532 // make a first turn with tight cut on initial curvature
533 for(Int_t turn = 1; turn <= 2; turn++) {
535 nSteps = (Int_t) (fgkSeedDepth / (3*fgkSeedStep));
536 step = (Int_t) (timeBins * (3*fgkSeedStep));
538 for(Int_t i=0; i<nSteps; i++) {
539 Int_t outer=timeBins-1-i*step;
540 Int_t inner=outer-gap;
542 nseed=fSeeds->GetEntriesFast();
544 MakeSeeds(inner, outer, turn);
546 nseed=fSeeds->GetEntriesFast();
547 printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
550 for (Int_t i=0; i<nseed; i++) {
551 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
552 FollowProlongation(t,innerTB);
553 if (t.GetNumberOfClusters() >= foundMin) {
555 CookLabel(pt, 1-fgkLabelFraction);
558 // cout<<found<<'\r';
561 if(PropagateToTPC(t)) {
562 AliTPCtrack *tpc = new AliTPCtrack(*pt,pt->GetAlpha());
568 delete fSeeds->RemoveAt(i);
577 cout<<"Total number of found tracks: "<<found<<endl;
586 //___________________________________________________________________
587 Int_t AliTRDtracker::Clusters2Tracks(AliESD* event)
590 // Finds tracks within the TRD. The ESD event is expected to contain seeds
591 // at the outer part of the TRD. The seeds
592 // are found within the TRD if fAddTRDseeds is TRUE.
593 // The tracks are propagated to the innermost time bin
594 // of the TRD and the ESD event is updated
597 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
598 Float_t foundMin = fgkMinClustersInTrack * timeBins;
601 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
603 Int_t n = event->GetNumberOfTracks();
604 for (Int_t i=0; i<n; i++) {
605 AliESDtrack* seed=event->GetTrack(i);
606 ULong_t status=seed->GetStatus();
607 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
608 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
611 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
612 //seed2->ResetCovariance();
613 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
615 FollowProlongation(t, innerTB);
616 if (t.GetNumberOfClusters() >= foundMin) {
618 CookLabel(pt, 1-fgkLabelFraction);
622 // cout<<found<<'\r';
624 if(PropagateToTPC(t)) {
625 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
631 cout<<"Number of loaded seeds: "<<nseed<<endl;
632 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
634 // after tracks from loaded seeds are found and the corresponding
635 // clusters are used, look for additional seeds from TRD
638 // Find tracks for the seeds in the TRD
639 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
641 Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
642 Int_t gap = (Int_t) (timeBins * fgkSeedGap);
643 Int_t step = (Int_t) (timeBins * fgkSeedStep);
645 // make a first turn with tight cut on initial curvature
646 for(Int_t turn = 1; turn <= 2; turn++) {
648 nSteps = (Int_t) (fgkSeedDepth / (3*fgkSeedStep));
649 step = (Int_t) (timeBins * (3*fgkSeedStep));
651 for(Int_t i=0; i<nSteps; i++) {
652 Int_t outer=timeBins-1-i*step;
653 Int_t inner=outer-gap;
655 nseed=fSeeds->GetEntriesFast();
657 MakeSeeds(inner, outer, turn);
659 nseed=fSeeds->GetEntriesFast();
660 printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
663 for (Int_t i=0; i<nseed; i++) {
664 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
665 FollowProlongation(t,innerTB);
666 if (t.GetNumberOfClusters() >= foundMin) {
668 CookLabel(pt, 1-fgkLabelFraction);
671 // cout<<found<<'\r';
672 if(PropagateToTPC(t)) {
674 track.UpdateTrackParams(pt,AliESDtrack::kTRDin);
675 event->AddTrack(&track);
678 delete fSeeds->RemoveAt(i);
685 cout<<"Total number of found tracks: "<<found<<endl;
692 //_____________________________________________________________________________
693 Int_t AliTRDtracker::PropagateBack(const TFile *inp, TFile *out) {
695 // Reads seeds from file <inp>. The seeds are AliTPCtrack's found and
696 // backpropagated by the TPC tracker. Each seed is first propagated
697 // to the TRD, and then its prolongation is searched in the TRD.
698 // If sufficiently long continuation of the track is found in the TRD
699 // the track is updated, otherwise it's stored as originaly defined
700 // by the TPC tracker.
705 TDirectory *savedir=gDirectory;
707 TFile *in=(TFile*)inp;
710 cerr<<"AliTRDtracker::PropagateBack(): ";
711 cerr<<"file with back propagated TPC tracks is not open !\n";
715 if (!out->IsOpen()) {
716 cerr<<"AliTRDtracker::PropagateBack(): ";
717 cerr<<"file for back propagated TRD tracks is not open !\n";
723 sprintf(tname,"seedsTPCtoTRD_%d",GetEventNumber());
724 TTree *seedTree=(TTree*)in->Get(tname);
726 cerr<<"AliTRDtracker::PropagateBack(): ";
727 cerr<<"can't get a tree with seeds from TPC !\n";
728 cerr<<"check if your version of TPC tracker creates tree "<<tname<<"\n";
732 AliTPCtrack *seed=new AliTPCtrack;
733 seedTree->SetBranchAddress("tracks",&seed);
735 Int_t n=(Int_t)seedTree->GetEntries();
736 for (Int_t i=0; i<n; i++) {
737 seedTree->GetEvent(i);
738 Int_t lbl = seed->GetLabel();
739 AliTRDtrack *tr = new AliTRDtrack(*seed,seed->GetAlpha());
740 tr->SetSeedLabel(lbl);
750 AliTPCtrack *otrack=0;
752 sprintf(tname,"seedsTRDtoTOF1_%d",GetEventNumber());
753 TTree tofTree1(tname,"Tracks back propagated through TPC and TRD");
754 tofTree1.Branch("tracks","AliTPCtrack",&otrack,32000,0);
756 sprintf(tname,"seedsTRDtoTOF2_%d",GetEventNumber());
757 TTree tofTree2(tname,"Tracks back propagated through TPC and TRD");
758 tofTree2.Branch("tracks","AliTPCtrack",&otrack,32000,0);
760 sprintf(tname,"seedsTRDtoPHOS_%d",GetEventNumber());
761 TTree phosTree(tname,"Tracks back propagated through TPC and TRD");
762 phosTree.Branch("tracks","AliTPCtrack",&otrack,32000,0);
764 sprintf(tname,"seedsTRDtoRICH_%d",GetEventNumber());
765 TTree richTree(tname,"Tracks back propagated through TPC and TRD");
766 richTree.Branch("tracks","AliTPCtrack",&otrack,32000,0);
768 sprintf(tname,"TRDb_%d",GetEventNumber());
769 TTree trdTree(tname,"Back propagated TRD tracks at outer TRD time bin");
770 AliTRDtrack *otrackTRD=0;
771 trdTree.Branch("tracks","AliTRDtrack",&otrackTRD,32000,0);
773 if (IsStoringBarrel()) SetBarrelTree("back");
777 Int_t nseed=fSeeds->GetEntriesFast();
779 // Float_t foundMin = fgkMinClustersInTrack * fTimeBinsPerPlane * fGeom->Nplan();
780 Float_t foundMin = 40;
782 Int_t outermostTB = fTrSec[0]->GetOuterTimeBin();
784 for (Int_t i=0; i<nseed; i++) {
786 AliTRDtrack *ps=(AliTRDtrack*)fSeeds->UncheckedAt(i), &s=*ps;
787 Int_t expectedClr = FollowBackProlongation(s);
789 if (IsStoringBarrel()) {
790 StoreBarrelTrack(ps, fgkLastPlane, kTrackBack);
794 Int_t foundClr = s.GetNumberOfClusters();
795 Int_t lastTB = fTrSec[0]->GetLayerNumber(s.GetX());
797 // printf("seed %d: found %d out of %d expected clusters, Min is %f\n",
798 // i, foundClr, expectedClr, foundMin);
800 if (foundClr >= foundMin) {
803 CookLabel(ps, 1-fgkLabelFraction);
807 // Propagate to outer reference plane [SR, GSI, 18.02.2003]
808 ps->PropagateTo(364.8);
812 // cout<<found<<'\r';
815 if(((expectedClr < 10) && (lastTB == outermostTB)) ||
816 ((expectedClr >= 10) &&
817 (((Float_t) foundClr) / ((Float_t) expectedClr) >=
818 fgkMinFractionOfFoundClusters) && (lastTB == outermostTB))) {
820 Double_t xTOF = 375.5;
822 if(PropagateToOuterPlane(s,xTOF)) {
823 AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
830 if(PropagateToOuterPlane(s,xTOF)) {
831 AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
836 Double_t xPHOS = 460.;
838 if(PropagateToOuterPlane(s,xPHOS)) {
839 AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
844 Double_t xRICH = 490+1.267;
846 if(PropagateToOuterPlane(s,xRICH)) {
847 AliTPCtrack *pt = new AliTPCtrack(*ps,ps->GetAlpha());
866 if (IsStoringBarrel()) { // [SR, 03.04.2003]
868 fBarrelTree->Write();
869 fBarrelFile->Flush();
873 cerr<<"Number of seeds: "<<nseed<<endl;
874 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
882 //_____________________________________________________________________________
883 Int_t AliTRDtracker::PropagateBack(AliESD* event) {
885 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
886 // backpropagated by the TPC tracker. Each seed is first propagated
887 // to the TRD, and then its prolongation is searched in the TRD.
888 // If sufficiently long continuation of the track is found in the TRD
889 // the track is updated, otherwise it's stored as originaly defined
890 // by the TPC tracker.
894 Float_t foundMin = 40;
896 Int_t n = event->GetNumberOfTracks();
897 for (Int_t i=0; i<n; i++) {
898 AliESDtrack* seed=event->GetTrack(i);
899 ULong_t status=seed->GetStatus();
900 if ( (status & AliESDtrack::kTPCout ) == 0 ) continue;
901 if ( (status & AliESDtrack::kTRDout) != 0 ) continue;
903 Int_t lbl = seed->GetLabel();
904 AliTRDtrack *track = new AliTRDtrack(*seed);
905 track->SetSeedLabel(lbl);
908 Int_t expectedClr = FollowBackProlongation(*track);
909 if (track->GetNumberOfClusters()<expectedClr/3){
910 AliTRDtrack *track1 = new AliTRDtrack(*seed);
911 track1->SetSeedLabel(lbl);
912 FollowBackProlongation(*track1);
913 AliTRDtrack *track2= new AliTRDtrack(*seed);
914 track->SetSeedLabel(lbl);
915 FollowBackProlongation(*track2);
920 Int_t foundClr = track->GetNumberOfClusters();
921 if (foundClr >= foundMin) {
924 // CookLabel(track, 1-fgkLabelFraction);
928 // Propagate to outer reference plane [SR, GSI, 18.02.2003]
929 // track->PropagateTo(364.8); why?
931 //seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
935 //Propagation to the TOF (I.Belikov)
937 if (track->GetStop()==kFALSE){
938 Double_t xTOF = 375.5;
939 PropagateToOuterPlane(*track,xTOF);
942 Double_t c2=track->GetC()*xtof - track->GetEta();
943 if (TMath::Abs(c2)>=0.9999999) continue;
945 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
946 Double_t y=track->GetYat(xtof);
948 if (!track->Rotate(AliTRDgeometry::GetAlpha())) return 1;
949 } else if (y <-ymax) {
950 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) return 1;
953 if (track->PropagateTo(xtof)) {
954 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
955 if (track->GetNumberOfClusters()>foundMin) found++;
958 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
959 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
960 seed->UpdateTrackParams(track, AliESDtrack::kTRDStop);
967 //End of propagation to the TOF
968 //if (foundClr>foundMin)
969 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
974 cerr<<"Number of seeds: "<<fNseeds<<endl;
975 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
977 fSeeds->Clear(); fNseeds=0;
983 //_____________________________________________________________________________
984 Int_t AliTRDtracker::RefitInward(AliESD* event)
987 // Refits tracks within the TRD. The ESD event is expected to contain seeds
988 // at the outer part of the TRD.
989 // The tracks are propagated to the innermost time bin
990 // of the TRD and the ESD event is updated
991 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
994 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
995 Float_t foundMin = fgkMinClustersInTrack * timeBins;
998 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
1000 Int_t n = event->GetNumberOfTracks();
1001 for (Int_t i=0; i<n; i++) {
1002 AliESDtrack* seed=event->GetTrack(i);
1003 ULong_t status=seed->GetStatus();
1004 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
1005 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
1008 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
1009 seed2->ResetCovariance(5.);
1010 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
1011 UInt_t * indexes2 = seed2->GetIndexes();
1012 UInt_t * indexes3 = pt->GetBackupIndexes();
1013 for (Int_t i=0;i<200;i++) {
1014 if (indexes2[i]==0) break;
1015 indexes3[i] = indexes2[i];
1017 //AliTRDtrack *pt = seed2;
1019 FollowProlongation(t, innerTB);
1021 if (t.GetNumberOfClusters()<seed->GetTRDclusters(indexes3)*0.5){
1022 // debug - why we dont go back?
1023 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
1024 UInt_t * indexes2 = seed2->GetIndexes();
1025 UInt_t * indexes3 = pt2->GetBackupIndexes();
1026 for (Int_t i=0;i<200;i++) {
1027 if (indexes2[i]==0) break;
1028 indexes3[i] = indexes2[i];
1030 FollowProlongation(*pt2, innerTB);
1034 if (t.GetNumberOfClusters() >= foundMin) {
1036 //CookLabel(pt, 1-fgkLabelFraction);
1040 // cout<<found<<'\r';
1042 if(PropagateToTPC(t)) {
1043 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
1049 cout<<"Number of loaded seeds: "<<nseed<<endl;
1050 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
1057 //---------------------------------------------------------------------------
1058 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
1060 // Starting from current position on track=t this function tries
1061 // to extrapolate the track up to timeBin=0 and to confirm prolongation
1062 // if a close cluster is found. Returns the number of clusters
1063 // expected to be found in sensitive layers
1065 Float_t wIndex, wTB, wChi2;
1066 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1067 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1068 Float_t wPx, wPy, wPz, wC;
1069 Double_t px, py, pz;
1070 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
1071 Int_t lastplane = GetLastPlane(&t);
1073 Int_t trackIndex = t.GetLabel();
1075 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1077 Int_t tryAgain=fMaxGap;
1079 Double_t alpha=t.GetAlpha();
1080 alpha = TVector2::Phi_0_2pi(alpha);
1082 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1083 Double_t radLength, rho, x, dx, y, ymax, z;
1085 Int_t expectedNumberOfClusters = 0;
1086 Bool_t lookForCluster;
1088 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1091 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1093 y = t.GetY(); z = t.GetZ();
1095 // first propagate to the inner surface of the current time bin
1096 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1097 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1098 if(!t.PropagateTo(x,radLength,rho)) break;
1100 ymax = x*TMath::Tan(0.5*alpha);
1103 if (!t.Rotate(alpha)) break;
1104 if(!t.PropagateTo(x,radLength,rho)) break;
1105 } else if (y <-ymax) {
1107 if (!t.Rotate(-alpha)) break;
1108 if(!t.PropagateTo(x,radLength,rho)) break;
1111 y = t.GetY(); z = t.GetZ();
1113 // now propagate to the middle plane of the next time bin
1114 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1115 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1116 if(!t.PropagateTo(x,radLength,rho)) break;
1118 ymax = x*TMath::Tan(0.5*alpha);
1121 if (!t.Rotate(alpha)) break;
1122 if(!t.PropagateTo(x,radLength,rho)) break;
1123 } else if (y <-ymax) {
1125 if (!t.Rotate(-alpha)) break;
1126 if(!t.PropagateTo(x,radLength,rho)) break;
1130 if(lookForCluster) {
1132 expectedNumberOfClusters++;
1133 wIndex = (Float_t) t.GetLabel();
1136 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
1138 Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
1139 Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
1142 if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
1143 else return expectedNumberOfClusters;
1147 wYwindow = (Float_t) road;
1148 t.GetPxPyPz(px,py,pz);
1152 wC = (Float_t) t.GetC();
1153 wSigmaC2 = (Float_t) t.GetSigmaC2();
1154 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1155 wSigmaY2 = (Float_t) t.GetSigmaY2();
1156 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1160 AliTRDcluster *cl=0;
1163 Double_t maxChi2=fgkMaxChi2;
1165 wYclosest = 12345678;
1166 wYcorrect = 12345678;
1167 wZclosest = 12345678;
1168 wZcorrect = 12345678;
1169 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1171 // Find the closest correct cluster for debugging purposes
1173 Float_t minDY = 1000000;
1174 for (Int_t i=0; i<timeBin; i++) {
1175 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1176 if((c->GetLabel(0) != trackIndex) &&
1177 (c->GetLabel(1) != trackIndex) &&
1178 (c->GetLabel(2) != trackIndex)) continue;
1179 if(TMath::Abs(c->GetY() - y) > minDY) continue;
1180 minDY = TMath::Abs(c->GetY() - y);
1181 wYcorrect = c->GetY();
1182 wZcorrect = c->GetZ();
1184 Double_t h01 = GetTiltFactor(c);
1185 wChi2 = t.GetPredictedChi2(c, h01);
1189 // Now go for the real cluster search
1193 //find cluster in history
1196 AliTRDcluster * cl0 = timeBin[0];
1200 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1201 if (plane>lastplane) continue;
1202 Int_t timebin = cl0->GetLocalTimeBin();
1203 AliTRDcluster * cl2= GetCluster(&t,plane, timebin);
1206 Double_t h01 = GetTiltFactor(cl);
1207 maxChi2=t.GetPredictedChi2(cl,h01);
1209 if ((!cl) && road>fgkWideRoad) {
1210 //if (t.GetNumberOfClusters()>4)
1211 // cerr<<t.GetNumberOfClusters()
1212 // <<"FindProlongation warning: Too broad road !\n";
1219 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1220 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1221 if (c->GetY() > y+road) break;
1222 if (c->IsUsed() > 0) continue;
1223 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1225 Double_t h01 = GetTiltFactor(c);
1226 Double_t chi2=t.GetPredictedChi2(c,h01);
1228 if (chi2 > maxChi2) continue;
1231 index=timeBin.GetIndex(i);
1237 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1238 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1240 if (c->GetY() > y+road) break;
1241 if (c->IsUsed() > 0) continue;
1242 if((c->GetZ()-z)*(c->GetZ()-z) > 12 * sz2) continue;
1244 Double_t h01 = GetTiltFactor(c);
1245 Double_t chi2=t.GetPredictedChi2(c, h01);
1247 if (chi2 > maxChi2) continue;
1250 index=timeBin.GetIndex(i);
1254 wYclosest = cl->GetY();
1255 wZclosest = cl->GetZ();
1256 Double_t h01 = GetTiltFactor(cl);
1258 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1259 //printf("Track position\t%f\t%f\t%f\n",t.GetX(),t.GetY(),t.GetZ());
1260 //printf("Cluster position\t%d\t%f\t%f\n",cl->GetLocalTimeBin(),cl->GetY(),cl->GetZ());
1261 Int_t det = cl->GetDetector();
1262 Int_t plane = fGeom->GetPlane(det);
1264 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1265 //if(!t.Update(cl,maxChi2,index,h01)) {
1266 //if(!tryAgain--) return 0;
1268 else tryAgain=fMaxGap;
1271 //if (tryAgain==0) break;
1276 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1278 printf(" %f", wIndex); //1
1279 printf(" %f", wTB); //2
1280 printf(" %f", wYrt); //3
1281 printf(" %f", wYclosest); //4
1282 printf(" %f", wYcorrect); //5
1283 printf(" %f", wYwindow); //6
1284 printf(" %f", wZrt); //7
1285 printf(" %f", wZclosest); //8
1286 printf(" %f", wZcorrect); //9
1287 printf(" %f", wZwindow); //10
1288 printf(" %f", wPx); //11
1289 printf(" %f", wPy); //12
1290 printf(" %f", wPz); //13
1291 printf(" %f", wSigmaC2*1000000); //14
1292 printf(" %f", wSigmaTgl2*1000); //15
1293 printf(" %f", wSigmaY2); //16
1294 // printf(" %f", wSigmaZ2); //17
1295 printf(" %f", wChi2); //17
1296 printf(" %f", wC); //18
1303 return expectedNumberOfClusters;
1308 //___________________________________________________________________
1310 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
1312 // Starting from current radial position of track <t> this function
1313 // extrapolates the track up to outer timebin and in the sensitive
1314 // layers confirms prolongation if a close cluster is found.
1315 // Returns the number of clusters expected to be found in sensitive layers
1317 Float_t wIndex, wTB, wChi2;
1318 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
1319 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
1320 Float_t wPx, wPy, wPz, wC;
1321 Double_t px, py, pz;
1322 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
1324 Int_t trackIndex = t.GetLabel();
1325 Int_t tryAgain=fMaxGap;
1327 Double_t alpha=t.GetAlpha();
1328 TVector2::Phi_0_2pi(alpha);
1332 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
1333 Double_t radLength, rho, x, dx, y, ymax = 0, z;
1334 Bool_t lookForCluster;
1336 Int_t expectedNumberOfClusters = 0;
1339 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1341 Int_t nRefPlane = fgkFirstPlane;
1342 Bool_t isNewLayer = kFALSE;
1348 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
1353 // first propagate to the outer surface of the current time bin
1356 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1357 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2;
1361 if(!t.PropagateTo(x,radLength,rho)) break;
1362 // if (!AdjustSector(&t)) break;
1364 // MI -fix untill correct material desription will be implemented
1366 Float_t angle = t.GetAlpha(); // MI - if rotation - we go through the material -
1367 if (!AdjustSector(&t)) break;
1368 if (TMath::Abs(angle - t.GetAlpha())>0.000001) break; //better to stop track
1369 Int_t currentzone = fTrSec[s]->GetLayer(nr)->GetZone(z);
1370 if (currentzone==-10) break; // we are in the frame
1371 if (currentzone>-10){ // layer knows where we are
1372 if (zone==-10) zone = currentzone;
1373 if (zone!=currentzone) break;
1378 if (!t.PropagateTo(x,radLength,rho)) break;
1383 // Barrel Tracks [SR, 04.04.2003]
1386 if (fTrSec[s]->GetLayer(nr)->IsSensitive() !=
1387 fTrSec[s]->GetLayer(nr+1)->IsSensitive() ) {
1389 // if (IsStoringBarrel()) StoreBarrelTrack(&t, nRefPlane++, kTrackBack);
1392 if (fTrSec[s]->GetLayer(nr-1)->IsSensitive() &&
1393 ! fTrSec[s]->GetLayer(nr)->IsSensitive()) {
1395 } else {isNewLayer = kFALSE;}
1400 // now propagate to the middle plane of the next time bin
1401 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1403 x = fTrSec[s]->GetLayer(nr+1)->GetX();
1404 if(!t.PropagateTo(x,radLength,rho)) break;
1405 if (!AdjustSector(&t)) break;
1407 if(!t.PropagateTo(x,radLength,rho)) break;
1412 if(fVocal) printf("nr+1=%d, x %f, z %f, y %f, ymax %f\n",nr+1,x,z,y,ymax);
1413 // printf("label %d, pl %d, lookForCluster %d \n",
1414 // trackIndex, nr+1, lookForCluster);
1416 if(lookForCluster) {
1417 expectedNumberOfClusters++;
1419 wIndex = (Float_t) t.GetLabel();
1420 wTB = fTrSec[s]->GetLayer(nr+1)->GetTimeBinIndex();
1422 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
1423 Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
1424 Double_t sz2=ExpectedSigmaZ2(t.GetX(),t.GetTgl());
1425 if((t.GetSigmaY2() + sy2) < 0) break;
1426 Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
1427 Double_t y=t.GetY(), z=t.GetZ();
1431 wYwindow = (Float_t) road;
1432 t.GetPxPyPz(px,py,pz);
1436 wC = (Float_t) t.GetC();
1437 wSigmaC2 = (Float_t) t.GetSigmaC2();
1438 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
1439 wSigmaY2 = (Float_t) t.GetSigmaY2();
1440 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
1443 if (road>fgkWideRoad) {
1444 if (t.GetNumberOfClusters()>4)
1445 cerr<<t.GetNumberOfClusters()
1446 <<"FindProlongation warning: Too broad road !\n";
1450 AliTRDcluster *cl=0;
1453 Double_t maxChi2=fgkMaxChi2;
1458 maxChi2 = 10 * fgkMaxChi2;
1461 if (nRefPlane == fgkFirstPlane) maxChi2 = 20 * fgkMaxChi2;
1462 if (nRefPlane == fgkFirstPlane+2) maxChi2 = 15 * fgkMaxChi2;
1463 if (t.GetNRotate() > 0) maxChi2 = 3 * maxChi2;
1466 wYclosest = 12345678;
1467 wYcorrect = 12345678;
1468 wZclosest = 12345678;
1469 wZcorrect = 12345678;
1470 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
1472 // Find the closest correct cluster for debugging purposes
1475 for (Int_t i=0; i<timeBin; i++) {
1476 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1477 if((c->GetLabel(0) != trackIndex) &&
1478 (c->GetLabel(1) != trackIndex) &&
1479 (c->GetLabel(2) != trackIndex)) continue;
1480 if(TMath::Abs(c->GetY() - y) > minDY) continue;
1481 //minDY = TMath::Abs(c->GetY() - y);
1482 minDY = c->GetY() - y;
1483 wYcorrect = c->GetY();
1484 wZcorrect = c->GetZ();
1486 Double_t h01 = GetTiltFactor(c);
1487 wChi2 = t.GetPredictedChi2(c, h01);
1491 // Now go for the real cluster search
1495 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1496 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1497 if (c->GetY() > y+road) break;
1498 if (c->IsUsed() > 0) continue;
1499 if((c->GetZ()-z)*(c->GetZ()-z) > 3 * sz2) continue;
1501 Double_t h01 = GetTiltFactor(c);
1502 chi2=t.GetPredictedChi2(c,h01);
1504 if (chi2 > maxChi2) continue;
1507 index=timeBin.GetIndex(i);
1510 if((c->GetLabel(0) != trackIndex) &&
1511 (c->GetLabel(1) != trackIndex) &&
1512 (c->GetLabel(2) != trackIndex)) t.AddNWrong();
1517 for (Int_t i=timeBin.Find(y-road); i<timeBin; i++) {
1518 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
1520 if (c->GetY() > y+road) break;
1521 if (c->IsUsed() > 0) continue;
1522 if((c->GetZ()-z)*(c->GetZ()-z) > 2.25 * 12 * sz2) continue;
1524 Double_t h01 = GetTiltFactor(c);
1525 chi2=t.GetPredictedChi2(c,h01);
1527 if (chi2 > maxChi2) continue;
1530 index=timeBin.GetIndex(i);
1535 wYclosest = cl->GetY();
1536 wZclosest = cl->GetZ();
1538 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1539 Double_t h01 = GetTiltFactor(cl);
1540 Int_t det = cl->GetDetector();
1541 Int_t plane = fGeom->GetPlane(det);
1543 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1544 //if(!t.Update(cl,maxChi2,index,h01)) {
1545 if(!tryAgain--) return 0;
1547 else tryAgain=fMaxGap;
1550 if (tryAgain==0) break;
1553 //if (minDY < 1000000 && isNewLayer)
1554 //cout << "\t" << nRefPlane << "\t" << "\t" << t.GetNRotate() << "\t" <<
1555 // road << "\t" << minDY << "\t" << chi2 << "\t" << wChi2 << "\t" << maxChi2 << endl;
1559 isNewLayer = kFALSE;
1562 if((((Int_t) wTB)%15 == 0) || (((Int_t) wTB)%15 == 14)) {
1564 printf(" %f", wIndex); //1
1565 printf(" %f", wTB); //2
1566 printf(" %f", wYrt); //3
1567 printf(" %f", wYclosest); //4
1568 printf(" %f", wYcorrect); //5
1569 printf(" %f", wYwindow); //6
1570 printf(" %f", wZrt); //7
1571 printf(" %f", wZclosest); //8
1572 printf(" %f", wZcorrect); //9
1573 printf(" %f", wZwindow); //10
1574 printf(" %f", wPx); //11
1575 printf(" %f", wPy); //12
1576 printf(" %f", wPz); //13
1577 printf(" %f", wSigmaC2*1000000); //14
1578 printf(" %f", wSigmaTgl2*1000); //15
1579 printf(" %f", wSigmaY2); //16
1580 // printf(" %f", wSigmaZ2); //17
1581 printf(" %f", wChi2); //17
1582 printf(" %f", wC); //18
1593 return expectedNumberOfClusters;
1598 //---------------------------------------------------------------------------
1599 Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
1601 // Starting from current position on track=t this function tries
1602 // to extrapolate the track up to timeBin=0 and to reuse already
1603 // assigned clusters. Returns the number of clusters
1604 // expected to be found in sensitive layers
1605 // get indices of assigned clusters for each layer
1606 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1609 for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
1610 for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
1611 Int_t index = t.GetClusterIndex(i);
1612 AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
1614 Int_t detector=cl->GetDetector();
1615 Int_t localTimeBin=cl->GetLocalTimeBin();
1616 Int_t sector=fGeom->GetSector(detector);
1617 Int_t plane=fGeom->GetPlane(detector);
1619 Int_t trackingSector = CookSectorIndex(sector);
1621 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1622 if(gtb < 0) continue;
1623 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1624 iCluster[layer] = index;
1628 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1630 Double_t alpha=t.GetAlpha();
1631 alpha = TVector2::Phi_0_2pi(alpha);
1633 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1634 Double_t radLength, rho, x, dx, y, ymax, z;
1636 Int_t expectedNumberOfClusters = 0;
1637 Bool_t lookForCluster;
1639 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1642 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1644 y = t.GetY(); z = t.GetZ();
1646 // first propagate to the inner surface of the current time bin
1647 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1648 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1649 if(!t.PropagateTo(x,radLength,rho)) break;
1651 ymax = x*TMath::Tan(0.5*alpha);
1654 if (!t.Rotate(alpha)) break;
1655 if(!t.PropagateTo(x,radLength,rho)) break;
1656 } else if (y <-ymax) {
1658 if (!t.Rotate(-alpha)) break;
1659 if(!t.PropagateTo(x,radLength,rho)) break;
1662 y = t.GetY(); z = t.GetZ();
1664 // now propagate to the middle plane of the next time bin
1665 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1666 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1667 if(!t.PropagateTo(x,radLength,rho)) break;
1669 ymax = x*TMath::Tan(0.5*alpha);
1672 if (!t.Rotate(alpha)) break;
1673 if(!t.PropagateTo(x,radLength,rho)) break;
1674 } else if (y <-ymax) {
1676 if (!t.Rotate(-alpha)) break;
1677 if(!t.PropagateTo(x,radLength,rho)) break;
1680 if(lookForCluster) expectedNumberOfClusters++;
1682 // use assigned cluster
1683 if (!iCluster[nr-1]) continue;
1684 AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
1685 Double_t h01 = GetTiltFactor(cl);
1686 Double_t chi2=t.GetPredictedChi2(cl, h01);
1687 t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1688 t.Update(cl,chi2,iCluster[nr-1],h01);
1691 return expectedNumberOfClusters;
1694 //___________________________________________________________________
1696 Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
1698 // Starting from current radial position of track <t> this function
1699 // extrapolates the track up to radial position <xToGo>.
1700 // Returns 1 if track reaches the plane, and 0 otherwise
1702 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1704 Double_t alpha=t.GetAlpha();
1706 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1707 if (alpha < 0. ) alpha += 2.*TMath::Pi();
1709 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1711 Bool_t lookForCluster;
1712 Double_t radLength, rho, x, dx, y, ymax, z;
1716 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1718 Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
1720 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
1722 y = t.GetY(); z = t.GetZ();
1724 // first propagate to the outer surface of the current time bin
1725 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1726 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
1727 if(!t.PropagateTo(x,radLength,rho)) return 0;
1729 ymax = x*TMath::Tan(0.5*alpha);
1732 if (!t.Rotate(alpha)) return 0;
1733 } else if (y <-ymax) {
1735 if (!t.Rotate(-alpha)) return 0;
1737 if(!t.PropagateTo(x,radLength,rho)) return 0;
1739 y = t.GetY(); z = t.GetZ();
1741 // now propagate to the middle plane of the next time bin
1742 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1743 x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
1744 if(!t.PropagateTo(x,radLength,rho)) return 0;
1746 ymax = x*TMath::Tan(0.5*alpha);
1749 if (!t.Rotate(alpha)) return 0;
1750 } else if (y <-ymax) {
1752 if (!t.Rotate(-alpha)) return 0;
1754 if(!t.PropagateTo(x,radLength,rho)) return 0;
1759 //___________________________________________________________________
1761 Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
1763 // Starting from current radial position of track <t> this function
1764 // extrapolates the track up to radial position of the outermost
1765 // padrow of the TPC.
1766 // Returns 1 if track reaches the TPC, and 0 otherwise
1768 //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1770 Double_t alpha=t.GetAlpha();
1771 alpha = TVector2::Phi_0_2pi(alpha);
1773 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1775 Bool_t lookForCluster;
1776 Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
1780 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1781 Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
1783 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
1788 // first propagate to the outer surface of the current time bin
1789 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1790 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
1792 if(!t.PropagateTo(x,radLength,rho)) return 0;
1794 if(!t.PropagateTo(x,radLength,rho)) return 0;
1799 // now propagate to the middle plane of the next time bin
1800 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1801 x = fTrSec[s]->GetLayer(nr-1)->GetX();
1803 if(!t.PropagateTo(x,radLength,rho)) return 0;
1805 if(!t.PropagateTo(x,radLength,rho)) return 0;
1810 void AliTRDtracker::LoadEvent()
1812 // Fills clusters into TRD tracking_sectors
1813 // Note that the numbering scheme for the TRD tracking_sectors
1814 // differs from that of TRD sectors
1816 ReadClusters(fClusters);
1817 Int_t ncl=fClusters->GetEntriesFast();
1818 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1822 // printf("\r %d left ",ncl);
1823 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
1824 Int_t detector=c->GetDetector();
1825 Int_t localTimeBin=c->GetLocalTimeBin();
1826 Int_t sector=fGeom->GetSector(detector);
1827 Int_t plane=fGeom->GetPlane(detector);
1829 Int_t trackingSector = CookSectorIndex(sector);
1831 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1832 if(gtb < 0) continue;
1833 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1836 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1842 //_____________________________________________________________________________
1843 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1845 // Fills clusters into TRD tracking_sectors
1846 // Note that the numbering scheme for the TRD tracking_sectors
1847 // differs from that of TRD sectors
1849 if (ReadClusters(fClusters,cTree)) {
1850 Error("LoadClusters","Problem with reading the clusters !");
1853 Int_t ncl=fClusters->GetEntriesFast();
1854 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1857 for (Int_t ichamber=0;ichamber<5;ichamber++)
1858 for (Int_t isector=0;isector<18;isector++){
1859 fHoles[ichamber][isector]=kTRUE;
1864 // printf("\r %d left ",ncl);
1865 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
1866 Int_t detector=c->GetDetector();
1867 Int_t localTimeBin=c->GetLocalTimeBin();
1868 Int_t sector=fGeom->GetSector(detector);
1869 Int_t plane=fGeom->GetPlane(detector);
1871 Int_t trackingSector = CookSectorIndex(sector);
1872 if (c->GetLabel(0)>0){
1873 Int_t chamber = fGeom->GetChamber(detector);
1874 fHoles[chamber][trackingSector]=kFALSE;
1877 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1878 if(gtb < 0) continue;
1879 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1882 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1888 for (Int_t isector=0;isector<18;isector++){
1889 for (Int_t ichamber=0;ichamber<5;ichamber++)
1890 if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
1891 printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
1892 fGeom->IsHole(0,ichamber,17-isector));
1898 //_____________________________________________________________________________
1899 void AliTRDtracker::UnloadEvent()
1902 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1907 nentr = fClusters->GetEntriesFast();
1908 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1910 nentr = fSeeds->GetEntriesFast();
1911 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1913 nentr = fTracks->GetEntriesFast();
1914 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1916 Int_t nsec = AliTRDgeometry::kNsect;
1918 for (i = 0; i < nsec; i++) {
1919 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1920 fTrSec[i]->GetLayer(pl)->Clear();
1926 //__________________________________________________________________________
1927 void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
1929 // Creates track seeds using clusters in timeBins=i1,i2
1932 cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
1936 Double_t x[5], c[15];
1937 Int_t maxSec=AliTRDgeometry::kNsect;
1939 Double_t alpha=AliTRDgeometry::GetAlpha();
1940 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
1941 Double_t cs=cos(alpha), sn=sin(alpha);
1942 Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
1945 Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
1946 Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
1948 Double_t x1 =fTrSec[0]->GetX(i1);
1949 Double_t xx2=fTrSec[0]->GetX(i2);
1951 for (Int_t ns=0; ns<maxSec; ns++) {
1953 Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1954 Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
1955 Int_t nm=(*fTrSec[ns]->GetLayer(i2));
1956 Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1957 Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
1959 AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
1961 for (Int_t is=0; is < r1; is++) {
1962 Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
1964 for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
1966 const AliTRDcluster *cl;
1967 Double_t x2, y2, z2;
1968 Double_t x3=0., y3=0.;
1971 if(turn != 2) continue;
1972 AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1974 y2=cl->GetY(); z2=cl->GetZ();
1979 else if (js<nl2+nl) {
1980 if(turn != 1) continue;
1981 AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
1983 y2=cl->GetY(); z2=cl->GetZ();
1988 else if (js<nl2+nl+nm) {
1989 if(turn != 1) continue;
1990 AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
1992 x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
1994 else if (js<nl2+nl+nm+nu) {
1995 if(turn != 1) continue;
1996 AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1997 cl=r2[js-nl2-nl-nm];
1998 y2=cl->GetY(); z2=cl->GetZ();
2004 if(turn != 2) continue;
2005 AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
2006 cl=r2[js-nl2-nl-nm-nu];
2007 y2=cl->GetY(); z2=cl->GetZ();
2013 if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
2015 Double_t zz=z1 - z1/x1*(x1-x2);
2017 if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
2019 Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
2020 if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
2024 x[4]=f1trd(x1,y1,x2,y2,x3,y3);
2026 if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
2028 x[2]=f2trd(x1,y1,x2,y2,x3,y3);
2030 if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
2032 x[3]=f3trd(x1,y1,x2,y2,z1,z2);
2034 if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
2036 Double_t a=asin(x[2]);
2037 Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
2039 if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
2041 Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
2042 Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
2043 Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
2046 Double_t h01 = GetTiltFactor(r1[is]);
2047 Double_t xuFactor = 100.;
2053 sy1=sy1+sz1*h01*h01;
2054 Double_t syz=sz1*(-h01);
2055 // end of tilt changes
2057 Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
2058 Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
2059 Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
2060 Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
2061 Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
2062 Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
2063 Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
2064 Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
2065 Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
2066 Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
2070 // c[1]=0.; c[2]=sz1;
2071 c[1]=syz; c[2]=sz1*xuFactor;
2072 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
2073 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
2074 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
2075 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
2076 c[13]=f30*sy1*f40+f32*sy2*f42;
2077 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
2079 UInt_t index=r1.GetIndex(is);
2081 AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
2083 Int_t rc=FollowProlongation(*track, i2);
2086 (track->GetNumberOfClusters() <
2087 (outer-inner)*fgkMinClustersInSeed)) delete track;
2089 fSeeds->AddLast(track); fNseeds++;
2090 // cerr<<"\r found seed "<<fNseeds;
2097 //_____________________________________________________________________________
2098 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree)
2101 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2102 // from the file. The names of the cluster tree and branches
2103 // should match the ones used in AliTRDclusterizer::WriteClusters()
2105 TObjArray *clusterArray = new TObjArray(400);
2107 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2109 Error("ReadClusters","Can't get the branch !");
2112 branch->SetAddress(&clusterArray);
2114 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2115 printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
2117 // Loop through all entries in the tree
2119 AliTRDcluster *c = 0;
2122 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2125 nbytes += ClusterTree->GetEvent(iEntry);
2127 // Get the number of points in the detector
2128 Int_t nCluster = clusterArray->GetEntriesFast();
2129 // printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2131 // Loop through all TRD digits
2132 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2133 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
2134 AliTRDcluster *co = new AliTRDcluster(*c);
2135 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2136 Int_t ltb = co->GetLocalTimeBin();
2137 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2138 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
2140 delete clusterArray->RemoveAt(iCluster);
2144 delete clusterArray;
2149 //______________________________________________________________________
2150 void AliTRDtracker::ReadClusters(TObjArray *array, const Char_t *filename)
2153 // Reads AliTRDclusters from file <filename>. The names of the cluster
2154 // tree and branches should match the ones used in
2155 // AliTRDclusterizer::WriteClusters()
2156 // if <array> == 0, clusters are added into AliTRDtracker fCluster array
2159 TDirectory *savedir=gDirectory;
2161 TFile *file = TFile::Open(filename);
2162 if (!file->IsOpen()) {
2163 cerr<<"Can't open file with TRD clusters"<<endl;
2167 Char_t treeName[12];
2168 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
2169 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
2172 cerr<<"AliTRDtracker::ReadClusters(): ";
2173 cerr<<"can't get a tree with clusters !\n";
2177 TObjArray *clusterArray = new TObjArray(400);
2179 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
2181 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2182 cout<<"found "<<nEntries<<" in clusterTree"<<endl;
2184 // Loop through all entries in the tree
2186 AliTRDcluster *c = 0;
2190 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2193 nbytes += clusterTree->GetEvent(iEntry);
2195 // Get the number of points in the detector
2196 Int_t nCluster = clusterArray->GetEntriesFast();
2197 printf("\n Read %d clusters from entry %d", nCluster, iEntry);
2199 // Loop through all TRD digits
2200 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2201 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
2202 AliTRDcluster *co = new AliTRDcluster(*c);
2203 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2204 Int_t ltb = co->GetLocalTimeBin();
2205 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2206 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
2208 delete clusterArray->RemoveAt(iCluster);
2213 delete clusterArray;
2218 void AliTRDtracker::ReadClusters(TObjArray *array, const TFile *inp)
2221 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2222 // from the file. The names of the cluster tree and branches
2223 // should match the ones used in AliTRDclusterizer::WriteClusters()
2226 TDirectory *savedir=gDirectory;
2229 TFile *in=(TFile*)inp;
2230 if (!in->IsOpen()) {
2231 cerr<<"AliTRDtracker::ReadClusters(): input file is not open !\n";
2239 Char_t treeName[12];
2240 sprintf(treeName,"TreeR%d_TRD",GetEventNumber());
2241 TTree *clusterTree = (TTree*) gDirectory->Get(treeName);
2243 TObjArray *clusterArray = new TObjArray(400);
2245 clusterTree->GetBranch("TRDcluster")->SetAddress(&clusterArray);
2247 Int_t nEntries = (Int_t) clusterTree->GetEntries();
2248 printf("found %d entries in %s.\n",nEntries,clusterTree->GetName());
2250 // Loop through all entries in the tree
2252 AliTRDcluster *c = 0;
2255 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2258 nbytes += clusterTree->GetEvent(iEntry);
2260 // Get the number of points in the detector
2261 Int_t nCluster = clusterArray->GetEntriesFast();
2262 // printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2264 // Loop through all TRD digits
2265 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2266 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
2267 AliTRDcluster *co = new AliTRDcluster(*c);
2268 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
2269 Int_t ltb = co->GetLocalTimeBin();
2270 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
2271 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
2273 delete clusterArray->RemoveAt(iCluster);
2277 delete clusterArray;
2282 //__________________________________________________________________
2283 void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
2286 // This cooks a label. Mmmmh, smells good...
2289 Int_t label=123456789, index, i, j;
2290 Int_t ncl=pt->GetNumberOfClusters();
2291 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
2295 // Int_t s[kRange][2];
2296 Int_t **s = new Int_t* [kRange];
2297 for (i=0; i<kRange; i++) {
2298 s[i] = new Int_t[2];
2300 for (i=0; i<kRange; i++) {
2306 for (i=0; i<ncl; i++) {
2307 index=pt->GetClusterIndex(i);
2308 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2314 for (i=0; i<ncl; i++) {
2315 index=pt->GetClusterIndex(i);
2316 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2317 for (Int_t k=0; k<3; k++) {
2318 label=c->GetLabel(k);
2319 labelAdded=kFALSE; j=0;
2321 while ( (!labelAdded) && ( j < kRange ) ) {
2322 if (s[j][0]==label || s[j][1]==0) {
2336 for (i=0; i<kRange; i++) {
2338 max=s[i][1]; label=s[i][0];
2342 for (i=0; i<kRange; i++) {
2348 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
2350 pt->SetLabel(label);
2355 //__________________________________________________________________
2356 void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
2359 // Use clusters, but don't abuse them!
2362 Int_t ncl=t->GetNumberOfClusters();
2363 for (Int_t i=from; i<ncl; i++) {
2364 Int_t index = t->GetClusterIndex(i);
2365 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
2371 //_____________________________________________________________________
2372 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
2374 // Parametrised "expected" error of the cluster reconstruction in Y
2376 Double_t s = 0.08 * 0.08;
2380 //_____________________________________________________________________
2381 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
2383 // Parametrised "expected" error of the cluster reconstruction in Z
2385 Double_t s = 9 * 9 /12.;
2389 //_____________________________________________________________________
2390 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
2393 // Returns radial position which corresponds to time bin <localTB>
2394 // in tracking sector <sector> and plane <plane>
2397 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
2398 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
2399 return fTrSec[sector]->GetLayer(pl)->GetX();
2404 //_______________________________________________________
2405 AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
2406 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
2409 // AliTRDpropagationLayer constructor
2412 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
2413 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
2416 for(Int_t i=0; i < (Int_t) kZones; i++) {
2417 fZc[i]=0; fZmax[i] = 0;
2422 if(fTimeBinIndex >= 0) {
2423 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
2424 fIndex = new UInt_t[kMaxClusterPerTimeBin];
2427 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
2438 //_______________________________________________________
2439 void AliTRDtracker::AliTRDpropagationLayer::SetHole(
2440 Double_t Zmax, Double_t Ymax, Double_t rho,
2441 Double_t radLength, Double_t Yc, Double_t Zc)
2444 // Sets hole in the layer
2452 fHoleX0 = radLength;
2456 //_______________________________________________________
2457 AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
2460 // AliTRDtrackingSector Constructor
2469 // get holes description from geometry
2470 Bool_t holes[AliTRDgeometry::kNcham];
2471 //printf("sector\t%d\t",gs);
2472 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
2473 holes[icham] = fGeom->IsHole(0,icham,gs);
2474 //printf("%d",holes[icham]);
2478 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
2481 AliTRDpropagationLayer* ppl;
2483 Double_t x, xin, xout, dx, rho, radLength;
2486 // set time bins in the gas of the TPC
2488 xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
2489 rho = 0.9e-3; radLength = 28.94;
2491 for(Int_t i=0; i<steps; i++) {
2492 x = xin + i*dx + dx/2;
2493 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2497 // set time bins in the outer field cage vessel
2499 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2500 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2503 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2504 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2507 dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
2508 steps = 5; dx = (xout - xin)/steps;
2509 for(Int_t i=0; i<steps; i++) {
2510 x = xin + i*dx + dx/2;
2511 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2515 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2516 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2519 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2520 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2524 // set time bins in CO2
2526 xin = xout; xout = 275.0;
2527 steps = 50; dx = (xout - xin)/steps;
2528 rho = 1.977e-3; radLength = 36.2;
2530 for(Int_t i=0; i<steps; i++) {
2531 x = xin + i*dx + dx/2;
2532 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2536 // set time bins in the outer containment vessel
2538 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2539 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2542 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2543 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2546 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2547 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2550 dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
2551 steps = 10; dx = (xout - xin)/steps;
2552 for(Int_t i=0; i<steps; i++) {
2553 x = xin + i*dx + dx/2;
2554 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2558 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
2559 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2562 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
2563 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2566 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
2567 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2570 Double_t xtrd = (Double_t) fGeom->Rmin();
2572 // add layers between TPC and TRD (Air temporarily)
2573 xin = xout; xout = xtrd;
2574 steps = 50; dx = (xout - xin)/steps;
2575 rho = 1.2e-3; radLength = 36.66;
2577 for(Int_t i=0; i<steps; i++) {
2578 x = xin + i*dx + dx/2;
2579 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2584 // Double_t alpha=AliTRDgeometry::GetAlpha();
2586 // add layers for each of the planes
2588 Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
2589 Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
2590 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2591 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2592 Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
2593 Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
2594 Double_t dxPlane = dxTEC + dxSpace;
2597 const Int_t kNchambers = AliTRDgeometry::Ncham();
2600 Double_t ymaxsensitive=0;
2601 Double_t *zc = new Double_t[kNchambers];
2602 Double_t *zmax = new Double_t[kNchambers];
2603 Double_t *zmaxsensitive = new Double_t[kNchambers];
2604 // Double_t holeZmax = 1000.; // the whole sector is missing
2606 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
2609 xin = xtrd + plane * dxPlane; xout = xin + dxRad;
2610 steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
2611 for(Int_t i=0; i<steps; i++) {
2612 x = xin + i*dx + dx/2;
2613 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2617 ymax = fGeom->GetChamberWidth(plane)/2.;
2618 ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
2620 for(Int_t ch = 0; ch < kNchambers; ch++) {
2621 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
2622 Float_t pad = fPar->GetRowPadSize(plane,ch,0);
2623 Float_t row0 = fPar->GetRow0(plane,ch,0);
2624 Int_t nPads = fPar->GetRowMax(plane,ch,0);
2625 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
2626 // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
2627 zc[ch] = (pad * nPads)/2 + row0;
2628 //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
2632 dx = fPar->GetTimeBinSize();
2633 rho = 0.00295 * 0.85; radLength = 11.0;
2635 Double_t x0 = (Double_t) fPar->GetTime0(plane);
2636 Double_t xbottom = x0 - dxDrift;
2637 Double_t xtop = x0 + dxAmp;
2639 // Amplification region
2640 steps = (Int_t) (dxAmp/dx);
2642 for(tb = 0; tb < steps; tb++) {
2643 x = x0 + tb * dx + dx/2;
2644 tbIndex = CookTimeBinIndex(plane, -tb-1);
2645 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
2646 ppl->SetYmax(ymax,ymaxsensitive);
2647 ppl->SetZ(zc, zmax, zmaxsensitive);
2648 ppl->SetHoles(holes);
2651 tbIndex = CookTimeBinIndex(plane, -steps);
2652 x = (x + dx/2 + xtop)/2;
2654 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
2655 ppl->SetYmax(ymax,ymaxsensitive);
2656 ppl->SetZ(zc, zmax,zmaxsensitive);
2657 ppl->SetHoles(holes);
2661 dx = fPar->GetTimeBinSize();
2662 steps = (Int_t) (dxDrift/dx);
2664 for(tb = 0; tb < steps; tb++) {
2665 x = x0 - tb * dx - dx/2;
2666 tbIndex = CookTimeBinIndex(plane, tb);
2668 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
2669 ppl->SetYmax(ymax,ymaxsensitive);
2670 ppl->SetZ(zc, zmax, zmaxsensitive);
2671 ppl->SetHoles(holes);
2674 tbIndex = CookTimeBinIndex(plane, steps);
2675 x = (x - dx/2 + xbottom)/2;
2677 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
2678 ppl->SetYmax(ymax,ymaxsensitive);
2679 ppl->SetZ(zc, zmax, zmaxsensitive);
2680 ppl->SetHoles(holes);
2684 xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
2685 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
2686 ppl->SetYmax(ymax,ymaxsensitive);
2687 ppl->SetZ(zc, zmax,zmax);
2688 ppl->SetHoles(holes);
2692 xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
2693 steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
2694 for(Int_t i=0; i<steps; i++) {
2695 x = xin + i*dx + dx/2;
2696 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2697 ppl->SetYmax(ymax,ymaxsensitive);
2698 ppl->SetZ(zc, zmax,zmax);
2699 ppl->SetHoles(holes);
2703 // Space between the chambers, air
2704 xin = xout; xout = xtrd + (plane + 1) * dxPlane;
2705 steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
2706 for(Int_t i=0; i<steps; i++) {
2707 x = xin + i*dx + dx/2;
2708 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2713 // Space between the TRD and RICH
2714 Double_t xRICH = 500.;
2715 xin = xout; xout = xRICH;
2716 steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
2717 for(Int_t i=0; i<steps; i++) {
2718 x = xin + i*dx + dx/2;
2719 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
2729 //______________________________________________________
2731 Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
2734 // depending on the digitization parameters calculates "global"
2735 // time bin index for timebin <localTB> in plane <plane>
2738 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
2739 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
2740 Double_t dx = (Double_t) fPar->GetTimeBinSize();
2742 Int_t tbAmp = fPar->GetTimeBefore();
2743 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
2744 if(kTRUE) maxAmp = 0; // intentional until we change parameter class
2745 Int_t tbDrift = fPar->GetTimeMax();
2746 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx);
2748 Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
2750 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
2753 (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
2754 if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
2761 //______________________________________________________
2763 void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
2766 // For all sensitive time bins sets corresponding layer index
2767 // in the array fTimeBins
2772 for(Int_t i = 0; i < fN; i++) {
2773 index = fLayers[i]->GetTimeBinIndex();
2775 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
2777 if(index < 0) continue;
2778 if(index >= (Int_t) kMaxTimeBinIndex) {
2779 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
2780 printf(" index %d exceeds allowed maximum of %d!\n",
2781 index, kMaxTimeBinIndex-1);
2784 fTimeBinIndex[index] = i;
2787 Double_t x1, dx1, x2, dx2, gap;
2789 for(Int_t i = 0; i < fN-1; i++) {
2790 x1 = fLayers[i]->GetX();
2791 dx1 = fLayers[i]->GetdX();
2792 x2 = fLayers[i+1]->GetX();
2793 dx2 = fLayers[i+1]->GetdX();
2794 gap = (x2 - dx2/2) - (x1 + dx1/2);
2796 printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
2797 printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
2800 printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
2801 printf(" (%f - %f) - (%f + %f) = %f\n",
2802 x2, dx2/2, x1, dx1, gap);
2808 //______________________________________________________
2811 Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
2814 // Returns the number of time bin which in radial position is closest to <x>
2817 if(x >= fLayers[fN-1]->GetX()) return fN-1;
2818 if(x <= fLayers[0]->GetX()) return 0;
2820 Int_t b=0, e=fN-1, m=(b+e)/2;
2821 for (; b<e; m=(b+e)/2) {
2822 if (x > fLayers[m]->GetX()) b=m+1;
2825 if(TMath::Abs(x - fLayers[m]->GetX()) >
2826 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
2831 //______________________________________________________
2833 Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
2836 // Returns number of the innermost SENSITIVE propagation layer
2839 return GetLayerNumber(0);
2842 //______________________________________________________
2844 Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
2847 // Returns number of the outermost SENSITIVE time bin
2850 return GetLayerNumber(GetNumberOfTimeBins() - 1);
2853 //______________________________________________________
2855 Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
2858 // Returns number of SENSITIVE time bins
2862 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
2863 layer = GetLayerNumber(tb);
2869 //______________________________________________________
2871 void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
2874 // Insert layer <pl> in fLayers array.
2875 // Layers are sorted according to X coordinate.
2877 if ( fN == ((Int_t) kMaxLayersPerSector)) {
2878 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
2881 if (fN==0) {fLayers[fN++] = pl; return;}
2882 Int_t i=Find(pl->GetX());
2884 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
2885 fLayers[i]=pl; fN++;
2889 //______________________________________________________
2891 Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
2894 // Returns index of the propagation layer nearest to X
2897 if (x <= fLayers[0]->GetX()) return 0;
2898 if (x > fLayers[fN-1]->GetX()) return fN;
2899 Int_t b=0, e=fN-1, m=(b+e)/2;
2900 for (; b<e; m=(b+e)/2) {
2901 if (x > fLayers[m]->GetX()) b=m+1;
2907 //______________________________________________________
2908 void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
2911 // set centers and the width of sectors
2912 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2913 fZc[icham] = center[icham];
2914 fZmax[icham] = w[icham];
2915 fZmaxSensitive[icham] = wsensitive[icham];
2916 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
2919 //______________________________________________________
2921 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
2924 // set centers and the width of sectors
2926 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
2927 fIsHole[icham] = holes[icham];
2928 if (holes[icham]) fHole = kTRUE;
2934 void AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
2935 Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
2936 Bool_t &lookForCluster) const
2939 // Returns radial step <dx>, density <rho>, rad. length <radLength>,
2940 // and sensitivity <lookForCluster> in point <y,z>
2946 lookForCluster = kFALSE;
2948 // check dead regions in sensitive volume
2949 if(fTimeBinIndex >= 0) {
2952 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2953 if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
2955 lookForCluster = !(fIsHole[zone]);
2956 if(TMath::Abs(y) > fYmaxSensitive){
2957 lookForCluster = kFALSE;
2959 if (fIsHole[zone]) {
2971 if (fHole==kFALSE) return;
2973 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2974 if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
2985 Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
2989 if (fTimeBinIndex < 0) return -20; //unknown
2990 Int_t zone=-10; // dead zone
2991 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
2992 if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
2999 //______________________________________________________
3001 void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
3004 // Insert cluster in cluster array.
3005 // Clusters are sorted according to Y coordinate.
3007 if(fTimeBinIndex < 0) {
3008 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
3012 if (fN== (Int_t) kMaxClusterPerTimeBin) {
3013 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
3016 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
3017 Int_t i=Find(c->GetY());
3018 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3019 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
3020 fIndex[i]=index; fClusters[i]=c; fN++;
3023 //______________________________________________________
3025 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Double_t y) const {
3027 // Returns index of the cluster nearest in Y
3029 if (y <= fClusters[0]->GetY()) return 0;
3030 if (y > fClusters[fN-1]->GetY()) return fN;
3031 Int_t b=0, e=fN-1, m=(b+e)/2;
3032 for (; b<e; m=(b+e)/2) {
3033 if (y > fClusters[m]->GetY()) b=m+1;
3039 //---------------------------------------------------------
3041 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
3043 // Returns correction factor for tilted pads geometry
3046 Double_t h01 = sin(TMath::Pi() / 180.0 * fPar->GetTiltingAngle());
3047 Int_t det = c->GetDetector();
3048 Int_t plane = fGeom->GetPlane(det);
3050 if((plane == 1) || (plane == 3) || (plane == 5)) h01=-h01;
3052 if(fNoTilt) h01 = 0;