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 "AliTRDpadPlane.h"
33 #include "AliTRDgeometryDetail.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"
51 ClassImp(AliTRDtracker)
54 const Float_t AliTRDtracker::fgkSeedDepth = 0.5;
55 const Float_t AliTRDtracker::fgkSeedStep = 0.10;
56 const Float_t AliTRDtracker::fgkSeedGap = 0.25;
58 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ12 = 40.;
59 const Float_t AliTRDtracker::fgkMaxSeedDeltaZ = 25.;
60 const Float_t AliTRDtracker::fgkMaxSeedC = 0.0052;
61 const Float_t AliTRDtracker::fgkMaxSeedTan = 1.2;
62 const Float_t AliTRDtracker::fgkMaxSeedVertexZ = 150.;
64 const Double_t AliTRDtracker::fgkSeedErrorSY = 0.2;
65 const Double_t AliTRDtracker::fgkSeedErrorSY3 = 2.5;
66 const Double_t AliTRDtracker::fgkSeedErrorSZ = 0.1;
68 const Float_t AliTRDtracker::fgkMinClustersInSeed = 0.7;
70 const Float_t AliTRDtracker::fgkMinClustersInTrack = 0.5;
71 const Float_t AliTRDtracker::fgkMinFractionOfFoundClusters = 0.8;
73 const Float_t AliTRDtracker::fgkSkipDepth = 0.3;
74 const Float_t AliTRDtracker::fgkLabelFraction = 0.8;
75 const Float_t AliTRDtracker::fgkWideRoad = 20.;
77 const Double_t AliTRDtracker::fgkMaxChi2 = 12.;
79 // const Double_t AliTRDtracker::fgkOffset = -0.012;
80 // const Double_t AliTRDtracker::fgkOffsetX = 0.35;
81 // const Double_t AliTRDtracker::fgkCoef = 0.00;
82 // const Double_t AliTRDtracker::fgkMean = 8.;
83 // const Double_t AliTRDtracker::fgkDriftCorrection = 1.07;
84 // const Double_t AliTRDtracker::fgkExB = 0.072;
86 const Double_t AliTRDtracker::fgkOffset = -0.019;
87 const Double_t AliTRDtracker::fgkOffsetX = 0.26; // "time offset"
88 // const Double_t AliTRDtracker::fgkCoef = 0.0096; // angular shift
89 const Double_t AliTRDtracker::fgkCoef = 0.0106; // angular shift
90 const Double_t AliTRDtracker::fgkMean = 0.;
91 const Double_t AliTRDtracker::fgkDriftCorrection = 1.055; // drift coefficient correction
92 const Double_t AliTRDtracker::fgkExB = 0.072; // ExB angle - for error parameterization
95 // poscorrection = fgkCoef*(GetLocalTimeBin() - fgkMean)+fgkOffset;
97 const Int_t AliTRDtracker::fgkFirstPlane = 5;
98 const Int_t AliTRDtracker::fgkLastPlane = 17;
100 //____________________________________________________________________
101 AliTRDtracker::AliTRDtracker():AliTracker(),
112 fTimeBinsPerPlane(0),
115 fAddTRDseeds(kFALSE),
118 // Default constructor
120 for(Int_t i=0;i<kTrackingSectors;i++) fTrSec[i]=0;
121 for(Int_t j=0;j<5;j++)
122 for(Int_t k=0;k<18;k++) fHoles[j][k]=kFALSE;
125 //____________________________________________________________________
126 AliTRDtracker::AliTRDtracker(const TFile *geomfile):AliTracker()
132 //Float_t fTzero = 0;
134 fAddTRDseeds = kFALSE;
138 TDirectory *savedir=gDirectory;
139 TFile *in=(TFile*)geomfile;
141 printf("AliTRDtracker::AliTRDtracker(): geometry file is not open!\n");
142 printf(" DETAIL TRD geometry and DEFAULT TRD parameter will be used\n");
147 fGeom = (AliTRDgeometry*) in->Get("TRDgeometry");
148 fPar = (AliTRDparameter*) in->Get("TRDparameter");
153 // fTzero = geo->GetT0();
154 // printf("Found geometry version %d on file \n", fGeom->IsVersion());
157 printf("AliTRDtracker::AliTRDtracker(): can't find TRD geometry!\n");
158 //printf("The DETAIL TRD geometry will be used\n");
159 //fGeom = new AliTRDgeometryDetail();
160 fGeom = new AliTRDgeometryDetail();
161 fGeom->SetPHOShole();
162 fGeom->SetRICHhole();
166 printf("AliTRDtracker::AliTRDtracker(): can't find TRD parameter!\n");
167 printf("The DEFAULT TRD parameter will be used\n");
168 fPar = new AliTRDparameter("Pica","Vyjebana");
170 fPar = new AliTRDparameter("Pica","Vyjebana");
175 // fGeom->SetT0(fTzero);
178 fClusters = new TObjArray(2000);
180 fSeeds = new TObjArray(2000);
182 fTracks = new TObjArray(1000);
184 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
185 Int_t trS = CookSectorIndex(geomS);
186 fTrSec[trS] = new AliTRDtrackingSector(fGeom, geomS, fPar);
187 for (Int_t icham=0;icham<AliTRDgeometry::kNcham; icham++){
188 fHoles[icham][trS]=fGeom->IsHole(0,icham,geomS);
191 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
192 Float_t tiltAngle = TMath::Abs(padPlane->GetTiltingAngle());
193 // Float_t tiltAngle = TMath::Abs(fPar->GetTiltingAngle());
194 if(tiltAngle < 0.1) {
201 if(fNoTilt && (tiltAngle > 0.1)) fSY2corr = fSY2corr + tiltAngle * 0.05;
204 // calculate max gap on track
206 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
207 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
209 Double_t dx = fgkDriftCorrection*(Double_t) fPar->GetDriftVelocity()
210 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
212 Int_t tbAmp = fPar->GetTimeBefore();
213 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
214 if(kTRUE) maxAmp = 0; // intentional until we change the parameter class
215 Int_t tbDrift = fPar->GetTimeMax();
216 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx)+4; // MI change - take also last time bins
218 tbDrift = TMath::Min(tbDrift,maxDrift);
219 tbAmp = TMath::Min(tbAmp,maxAmp);
221 fTimeBinsPerPlane = tbAmp + tbDrift;
222 fMaxGap = (Int_t) (fTimeBinsPerPlane * fGeom->Nplan() * fgkSkipDepth);
226 fDebugStreamer = new TTreeSRedirector("TRDdebug.root");
231 //___________________________________________________________________
232 AliTRDtracker::~AliTRDtracker()
235 // Destructor of AliTRDtracker
253 for(Int_t geomS = 0; geomS < kTrackingSectors; geomS++) {
254 delete fTrSec[geomS];
256 if (fDebugStreamer) {
257 //fDebugStreamer->Close();
258 delete fDebugStreamer;
262 //_____________________________________________________________________
264 Bool_t AliTRDtracker::AdjustSector(AliTRDtrack *track) {
266 // Rotates the track when necessary
269 Double_t alpha = AliTRDgeometry::GetAlpha();
270 Double_t y = track->GetY();
271 Double_t ymax = track->GetX()*TMath::Tan(0.5*alpha);
273 //Int_t ns = AliTRDgeometry::kNsect;
274 //Int_t s=Int_t(track->GetAlpha()/alpha)%ns;
278 if (!track->Rotate(alpha)) return kFALSE;
279 } else if (y <-ymax) {
281 if (!track->Rotate(-alpha)) return kFALSE;
287 //_____________________________________________________________________
288 inline Double_t f1trd(Double_t x1,Double_t y1,
289 Double_t x2,Double_t y2,
290 Double_t x3,Double_t y3)
293 // Initial approximation of the track curvature
295 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
296 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
297 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
298 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
299 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
301 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
303 return -xr*yr/sqrt(xr*xr+yr*yr);
306 //_____________________________________________________________________
307 inline Double_t f2trd(Double_t x1,Double_t y1,
308 Double_t x2,Double_t y2,
309 Double_t x3,Double_t y3)
312 // Initial approximation of the track curvature times X coordinate
313 // of the center of curvature
316 Double_t d=(x2-x1)*(y3-y2)-(x3-x2)*(y2-y1);
317 Double_t a=0.5*((y3-y2)*(y2*y2-y1*y1+x2*x2-x1*x1)-
318 (y2-y1)*(y3*y3-y2*y2+x3*x3-x2*x2));
319 Double_t b=0.5*((x2-x1)*(y3*y3-y2*y2+x3*x3-x2*x2)-
320 (x3-x2)*(y2*y2-y1*y1+x2*x2-x1*x1));
322 Double_t xr=TMath::Abs(d/(d*x1-a)), yr=d/(d*y1-b);
324 return -a/(d*y1-b)*xr/sqrt(xr*xr+yr*yr);
327 //_____________________________________________________________________
328 inline Double_t f3trd(Double_t x1,Double_t y1,
329 Double_t x2,Double_t y2,
330 Double_t z1,Double_t z2)
333 // Initial approximation of the tangent of the track dip angle
336 return (z1 - z2)/sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));
340 AliTRDcluster * AliTRDtracker::GetCluster(AliTRDtrack * track, Int_t plane, Int_t timebin, UInt_t &index){
342 //try to find cluster in the backup list
344 AliTRDcluster * cl =0;
345 UInt_t *indexes = track->GetBackupIndexes();
346 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
347 if (indexes[i]==0) break;
348 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
350 if (cli->GetLocalTimeBin()!=timebin) continue;
351 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
362 Int_t AliTRDtracker::GetLastPlane(AliTRDtrack * track){
364 //return last updated plane
366 UInt_t *indexes = track->GetBackupIndexes();
367 for (UInt_t i=0;i<kMaxTimeBinIndex;i++){
368 AliTRDcluster * cli = (AliTRDcluster*)fClusters->UncheckedAt(indexes[i]);
370 Int_t iplane = fGeom->GetPlane(cli->GetDetector());
371 if (iplane>lastplane) {
377 //___________________________________________________________________
378 Int_t AliTRDtracker::Clusters2Tracks(AliESD* event)
381 // Finds tracks within the TRD. The ESD event is expected to contain seeds
382 // at the outer part of the TRD. The seeds
383 // are found within the TRD if fAddTRDseeds is TRUE.
384 // The tracks are propagated to the innermost time bin
385 // of the TRD and the ESD event is updated
388 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
389 Float_t foundMin = fgkMinClustersInTrack * timeBins;
392 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
394 Int_t n = event->GetNumberOfTracks();
395 for (Int_t i=0; i<n; i++) {
396 AliESDtrack* seed=event->GetTrack(i);
397 ULong_t status=seed->GetStatus();
398 if ( (status & AliESDtrack::kTRDout ) == 0 ) continue;
399 if ( (status & AliESDtrack::kTRDin) != 0 ) continue;
402 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
403 //seed2->ResetCovariance();
404 AliTRDtrack *pt = new AliTRDtrack(*seed2,seed2->GetAlpha());
406 FollowProlongation(t, innerTB);
407 if (t.GetNumberOfClusters() >= foundMin) {
409 CookLabel(pt, 1-fgkLabelFraction);
413 // cout<<found<<'\r';
415 if(PropagateToTPC(t)) {
416 seed->UpdateTrackParams(pt, AliESDtrack::kTRDin);
422 cout<<"Number of loaded seeds: "<<nseed<<endl;
423 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
425 // after tracks from loaded seeds are found and the corresponding
426 // clusters are used, look for additional seeds from TRD
429 // Find tracks for the seeds in the TRD
430 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
432 Int_t nSteps = (Int_t) (fgkSeedDepth / fgkSeedStep);
433 Int_t gap = (Int_t) (timeBins * fgkSeedGap);
434 Int_t step = (Int_t) (timeBins * fgkSeedStep);
436 // make a first turn with tight cut on initial curvature
437 for(Int_t turn = 1; turn <= 2; turn++) {
439 nSteps = (Int_t) (fgkSeedDepth / (3*fgkSeedStep));
440 step = (Int_t) (timeBins * (3*fgkSeedStep));
442 for(Int_t i=0; i<nSteps; i++) {
443 Int_t outer=timeBins-1-i*step;
444 Int_t inner=outer-gap;
446 nseed=fSeeds->GetEntriesFast();
448 MakeSeeds(inner, outer, turn);
450 nseed=fSeeds->GetEntriesFast();
451 // printf("\n turn %d, step %d: number of seeds for TRD inward %d\n",
454 for (Int_t i=0; i<nseed; i++) {
455 AliTRDtrack *pt=(AliTRDtrack*)fSeeds->UncheckedAt(i), &t=*pt;
456 FollowProlongation(t,innerTB);
457 if (t.GetNumberOfClusters() >= foundMin) {
459 CookLabel(pt, 1-fgkLabelFraction);
462 // cout<<found<<'\r';
463 if(PropagateToTPC(t)) {
465 track.UpdateTrackParams(pt,AliESDtrack::kTRDin);
466 event->AddTrack(&track);
467 // track.SetTRDtrack(new AliTRDtrack(*pt));
470 delete fSeeds->RemoveAt(i);
477 cout<<"Total number of found tracks: "<<found<<endl;
484 //_____________________________________________________________________________
485 Int_t AliTRDtracker::PropagateBack(AliESD* event) {
487 // Gets seeds from ESD event. The seeds are AliTPCtrack's found and
488 // backpropagated by the TPC tracker. Each seed is first propagated
489 // to the TRD, and then its prolongation is searched in the TRD.
490 // If sufficiently long continuation of the track is found in the TRD
491 // the track is updated, otherwise it's stored as originaly defined
492 // by the TPC tracker.
496 Float_t foundMin = 20;
497 Int_t n = event->GetNumberOfTracks();
500 Float_t *quality =new Float_t[n];
501 Int_t *index =new Int_t[n];
502 for (Int_t i=0; i<n; i++) {
503 AliESDtrack* seed=event->GetTrack(i);
504 Double_t covariance[15];
505 seed->GetExternalCovariance(covariance);
506 quality[i] = covariance[0]+covariance[2];
508 TMath::Sort(n,quality,index,kFALSE);
510 for (Int_t i=0; i<n; i++) {
511 // AliESDtrack* seed=event->GetTrack(i);
512 AliESDtrack* seed=event->GetTrack(index[i]);
514 ULong_t status=seed->GetStatus();
515 if ( (status & AliESDtrack::kTPCout ) == 0 ) continue;
516 if ( (status & AliESDtrack::kTRDout) != 0 ) continue;
518 Int_t lbl = seed->GetLabel();
519 AliTRDtrack *track = new AliTRDtrack(*seed);
520 track->SetSeedLabel(lbl);
521 seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup); //make backup
523 Float_t p4 = track->GetC();
525 Int_t expectedClr = FollowBackProlongationG(*track);
527 // only debug purpose
528 if (track->GetNumberOfClusters()<expectedClr/3){
529 AliTRDtrack *track1 = new AliTRDtrack(*seed);
530 track1->SetSeedLabel(lbl);
531 FollowBackProlongation(*track1);
532 AliTRDtrack *track2= new AliTRDtrack(*seed);
533 track->SetSeedLabel(lbl);
534 FollowBackProlongation(*track2);
539 if (TMath::Abs(track->GetC()-p4)/TMath::Abs(p4)<0.2 || TMath::Abs(track->GetPt())>0.8 ) {
541 //make backup for back propagation
543 Int_t foundClr = track->GetNumberOfClusters();
544 if (foundClr >= foundMin) {
546 CookdEdxTimBin(*track);
547 CookLabel(track, 1-fgkLabelFraction);
548 if (track->GetBackupTrack()) UseClusters(track->GetBackupTrack());
549 if(track->GetChi2()/track->GetNumberOfClusters()<4) { // sign only gold tracks
550 if (seed->GetKinkIndex(0)==0&&TMath::Abs(track->GetPt())<1.5 ) UseClusters(track);
552 Bool_t isGold = kFALSE;
554 if (track->GetChi2()/track->GetNumberOfClusters()<5) { //full gold track
555 // seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
556 if (track->GetBackupTrack()) seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
559 if (!isGold && track->GetNCross()==0&&track->GetChi2()/track->GetNumberOfClusters()<7){ //almost gold track
560 // seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
561 if (track->GetBackupTrack()) seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
564 if (!isGold && track->GetBackupTrack()){
565 if (track->GetBackupTrack()->GetNumberOfClusters()>foundMin&&
566 (track->GetBackupTrack()->GetChi2()/(track->GetBackupTrack()->GetNumberOfClusters()+1))<7){
567 seed->UpdateTrackParams(track->GetBackupTrack(), AliESDtrack::kTRDbackup);
571 if (track->StatusForTOF()>0 &&track->fNCross==0 && Float_t(track->fN)/Float_t(track->fNExpected)>0.4){
572 seed->UpdateTrackParams(track, AliESDtrack::kTRDbackup);
576 // Debug part of tracking
577 TTreeSRedirector& cstream = *fDebugStreamer;
578 Int_t eventNr = event->GetEventNumber();
579 if (track->GetBackupTrack()){
581 "EventNr="<<eventNr<<
584 "trdback.="<<track->GetBackupTrack()<<
588 "EventNr="<<eventNr<<
595 //Propagation to the TOF (I.Belikov)
596 if (track->GetStop()==kFALSE){
599 Double_t c2=track->GetC()*xtof - track->GetEta();
600 if (TMath::Abs(c2)>=0.99) {
604 Double_t xTOF0 = 365. ;
605 PropagateToOuterPlane(*track,xTOF0);
607 //energy losses taken to the account - check one more time
608 c2=track->GetC()*xtof - track->GetEta();
609 if (TMath::Abs(c2)>=0.99) {
615 Double_t ymax=xtof*TMath::Tan(0.5*AliTRDgeometry::GetAlpha());
616 Double_t y=track->GetYat(xtof);
618 if (!track->Rotate(AliTRDgeometry::GetAlpha())) {
622 } else if (y <-ymax) {
623 if (!track->Rotate(-AliTRDgeometry::GetAlpha())) {
629 if (track->PropagateTo(xtof)) {
630 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
631 for (Int_t i=0;i<kNPlane;i++) {
632 seed->SetTRDsignals(track->GetPIDsignals(i),i);
633 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
635 // seed->SetTRDtrack(new AliTRDtrack(*track));
636 if (track->GetNumberOfClusters()>foundMin) found++;
639 if (track->GetNumberOfClusters()>15&&track->GetNumberOfClusters()>0.5*expectedClr){
640 seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
641 //seed->SetStatus(AliESDtrack::kTRDStop);
642 for (Int_t i=0;i<kNPlane;i++) {
643 seed->SetTRDsignals(track->GetPIDsignals(i),i);
644 seed->SetTRDTimBin(track->GetPIDTimBin(i),i);
646 //seed->SetTRDtrack(new AliTRDtrack(*track));
650 seed->SetTRDQuality(track->StatusForTOF());
651 seed->SetTRDBudget(track->fBudget[0]);
655 //End of propagation to the TOF
656 //if (foundClr>foundMin)
657 // seed->UpdateTrackParams(track, AliESDtrack::kTRDout);
662 cerr<<"Number of seeds: "<<fNseeds<<endl;
663 cerr<<"Number of back propagated TRD tracks: "<<found<<endl;
665 // MakeSeedsMI(3,5,event); //new seeding
668 fSeeds->Clear(); fNseeds=0;
676 //_____________________________________________________________________________
677 Int_t AliTRDtracker::RefitInward(AliESD* event)
680 // Refits tracks within the TRD. The ESD event is expected to contain seeds
681 // at the outer part of the TRD.
682 // The tracks are propagated to the innermost time bin
683 // of the TRD and the ESD event is updated
684 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
687 Int_t timeBins = fTrSec[0]->GetNumberOfTimeBins();
688 Float_t foundMin = fgkMinClustersInTrack * timeBins;
691 Int_t innerTB = fTrSec[0]->GetInnerTimeBin();
694 Int_t n = event->GetNumberOfTracks();
695 for (Int_t i=0; i<n; i++) {
696 AliESDtrack* seed=event->GetTrack(i);
697 new(&seed2) AliTRDtrack(*seed);
698 if (seed2.GetX()<270){
699 seed->UpdateTrackParams(&seed2, AliESDtrack::kTRDbackup); // backup TPC track - only update
703 ULong_t status=seed->GetStatus();
704 if ( (status & AliESDtrack::kTRDout ) == 0 ) {
707 if ( (status & AliESDtrack::kTRDin) != 0 ) {
711 // if (1/seed2.Get1Pt()>1.5&& seed2.GetX()>260.) {
712 // Double_t oldx = seed2.GetX();
713 // seed2.PropagateTo(500.);
714 // seed2.ResetCovariance(1.);
715 // seed2.PropagateTo(oldx);
718 // seed2.ResetCovariance(5.);
721 AliTRDtrack *pt = new AliTRDtrack(seed2,seed2.GetAlpha());
722 UInt_t * indexes2 = seed2.GetIndexes();
723 for (Int_t i=0;i<kNPlane;i++) {
724 pt->SetPIDsignals(seed2.GetPIDsignals(i),i);
725 pt->SetPIDTimBin(seed2.GetPIDTimBin(i),i);
728 UInt_t * indexes3 = pt->GetBackupIndexes();
729 for (Int_t i=0;i<200;i++) {
730 if (indexes2[i]==0) break;
731 indexes3[i] = indexes2[i];
733 //AliTRDtrack *pt = seed2;
735 FollowProlongationG(t, innerTB);
736 if (t.GetNumberOfClusters() >= foundMin) {
738 //CookLabel(pt, 1-fgkLabelFraction);
743 // cout<<found<<'\r';
745 if(PropagateToTPC(t)) {
746 seed->UpdateTrackParams(pt, AliESDtrack::kTRDrefit);
747 for (Int_t i=0;i<kNPlane;i++) {
748 seed->SetTRDsignals(pt->GetPIDsignals(i),i);
749 seed->SetTRDTimBin(pt->GetPIDTimBin(i),i);
752 //if not prolongation to TPC - propagate without update
753 AliTRDtrack* seed2 = new AliTRDtrack(*seed);
754 seed2->ResetCovariance(5.);
755 AliTRDtrack *pt2 = new AliTRDtrack(*seed2,seed2->GetAlpha());
757 if (PropagateToTPC(*pt2)) {
758 //pt2->CookdEdx(0.,1.);
759 pt2->CookdEdx( ); // Modification by PS
760 CookdEdxTimBin(*pt2);
761 seed->UpdateTrackParams(pt2, AliESDtrack::kTRDrefit);
762 for (Int_t i=0;i<kNPlane;i++) {
763 seed->SetTRDsignals(pt2->GetPIDsignals(i),i);
764 seed->SetTRDTimBin(pt2->GetPIDTimBin(i),i);
772 cout<<"Number of loaded seeds: "<<nseed<<endl;
773 cout<<"Number of found tracks from loaded seeds: "<<found<<endl;
780 //---------------------------------------------------------------------------
781 Int_t AliTRDtracker::FollowProlongation(AliTRDtrack& t, Int_t rf)
783 // Starting from current position on track=t this function tries
784 // to extrapolate the track up to timeBin=0 and to confirm prolongation
785 // if a close cluster is found. Returns the number of clusters
786 // expected to be found in sensitive layers
788 Float_t wIndex, wTB, wChi2;
789 Float_t wYrt, wYclosest, wYcorrect, wYwindow;
790 Float_t wZrt, wZclosest, wZcorrect, wZwindow;
791 Float_t wPx, wPy, wPz, wC;
793 Float_t wSigmaC2, wSigmaTgl2, wSigmaY2, wSigmaZ2;
794 Int_t lastplane = GetLastPlane(&t);
795 Double_t dxsample = fgkDriftCorrection*(Double_t) fPar->GetDriftVelocity()
796 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
797 Int_t trackIndex = t.GetLabel();
799 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
801 Int_t tryAgain=fMaxGap;
803 Double_t alpha=t.GetAlpha();
804 alpha = TVector2::Phi_0_2pi(alpha);
806 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
807 Double_t radLength, rho, x, dx, y, ymax, z;
809 Int_t expectedNumberOfClusters = 0;
810 Bool_t lookForCluster;
812 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
815 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
817 y = t.GetY(); z = t.GetZ();
819 // first propagate to the inner surface of the current time bin
820 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
821 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
822 if(!t.PropagateTo(x,radLength,rho)) break;
824 ymax = x*TMath::Tan(0.5*alpha);
827 if (!t.Rotate(alpha)) break;
828 if(!t.PropagateTo(x,radLength,rho)) break;
829 } else if (y <-ymax) {
831 if (!t.Rotate(-alpha)) break;
832 if(!t.PropagateTo(x,radLength,rho)) break;
835 y = t.GetY(); z = t.GetZ();
837 // now propagate to the middle plane of the next time bin
838 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
839 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
840 if(!t.PropagateTo(x,radLength,rho)) break;
842 ymax = x*TMath::Tan(0.5*alpha);
845 if (!t.Rotate(alpha)) break;
846 if(!t.PropagateTo(x,radLength,rho)) break;
847 } else if (y <-ymax) {
849 if (!t.Rotate(-alpha)) break;
850 if(!t.PropagateTo(x,radLength,rho)) break;
856 expectedNumberOfClusters++;
857 wIndex = (Float_t) t.GetLabel();
860 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr-1));
862 Double_t sy2=ExpectedSigmaY2(x,t.GetTgl(),t.GetPt());
863 Double_t sz2=ExpectedSigmaZ2(x,t.GetTgl());
866 if((t.GetSigmaY2() + sy2) > 0) road=10.*sqrt(t.GetSigmaY2() + sy2);
867 else return expectedNumberOfClusters;
871 wYwindow = (Float_t) road;
872 t.GetPxPyPz(px,py,pz);
876 wC = (Float_t) t.GetC();
877 wSigmaC2 = (Float_t) t.GetSigmaC2();
878 wSigmaTgl2 = (Float_t) t.GetSigmaTgl2();
879 wSigmaY2 = (Float_t) t.GetSigmaY2();
880 wSigmaZ2 = (Float_t) t.GetSigmaZ2();
887 Double_t maxChi2=fgkMaxChi2;
889 wYclosest = 12345678;
890 wYcorrect = 12345678;
891 wZclosest = 12345678;
892 wZcorrect = 12345678;
893 wZwindow = TMath::Sqrt(2.25 * 12 * sz2);
895 // Find the closest correct cluster for debugging purposes
896 if (timeBin&&fVocal) {
897 Float_t minDY = 1000000;
898 for (Int_t i=0; i<timeBin; i++) {
899 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
900 if((c->GetLabel(0) != trackIndex) &&
901 (c->GetLabel(1) != trackIndex) &&
902 (c->GetLabel(2) != trackIndex)) continue;
903 if(TMath::Abs(c->GetY() - y) > minDY) continue;
904 minDY = TMath::Abs(c->GetY() - y);
905 wYcorrect = c->GetY();
906 wZcorrect = c->GetZ();
908 Double_t h01 = GetTiltFactor(c);
909 wChi2 = t.GetPredictedChi2(c, h01);
913 // Now go for the real cluster search
917 //find cluster in history
920 AliTRDcluster * cl0 = timeBin[0];
924 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
925 if (plane>lastplane) continue;
926 Int_t timebin = cl0->GetLocalTimeBin();
927 AliTRDcluster * cl2= GetCluster(&t,plane, timebin,index);
930 Double_t h01 = GetTiltFactor(cl);
931 maxChi2=t.GetPredictedChi2(cl,h01);
933 if ((!cl) && road>fgkWideRoad) {
934 //if (t.GetNumberOfClusters()>4)
935 // cerr<<t.GetNumberOfClusters()
936 // <<"FindProlongation warning: Too broad road !\n";
942 wYclosest = cl->GetY();
943 wZclosest = cl->GetZ();
944 Double_t h01 = GetTiltFactor(cl);
946 //if (cl->GetNPads()<5)
947 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
948 Int_t det = cl->GetDetector();
949 Int_t plane = fGeom->GetPlane(det);
951 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
952 //if(!t.Update(cl,maxChi2,index,h01)) {
953 //if(!tryAgain--) return 0;
955 else tryAgain=fMaxGap;
958 //if (tryAgain==0) break;
964 return expectedNumberOfClusters;
972 //---------------------------------------------------------------------------
973 Int_t AliTRDtracker::FollowProlongationG(AliTRDtrack& t, Int_t rf)
975 // Starting from current position on track=t this function tries
976 // to extrapolate the track up to timeBin=0 and to confirm prolongation
977 // if a close cluster is found. Returns the number of clusters
978 // expected to be found in sensitive layers
979 // GeoManager used to estimate mean density
981 Int_t lastplane = GetLastPlane(&t);
982 Int_t tryAgain=fMaxGap;
983 Double_t alpha=t.GetAlpha();
984 alpha = TVector2::Phi_0_2pi(alpha);
985 Double_t radLength = 0.0;
989 Int_t expectedNumberOfClusters = 0;
990 Double_t dxsample = fgkDriftCorrection*(Double_t) fPar->GetDriftVelocity()
991 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
994 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
995 Double_t tanmax = TMath::Tan(0.5*alpha);
997 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
999 // propagate track in non active layers
1001 if (!(fTrSec[0]->GetLayer(nr)->IsSensitive())){
1002 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
1003 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
1004 while (nr >rf && (!(fTrSec[0]->GetLayer(nr)->IsSensitive()))){
1005 x = fTrSec[0]->GetLayer(nr)->GetX();
1007 if (!t.GetProlongation(x,y,z)) break;
1008 if (TMath::Abs(y)>x*tanmax){
1014 x = fTrSec[0]->GetLayer(nr)->GetX();
1015 if (!t.GetProlongation(x,y,z)) break;
1017 // minimal mean and maximal budget scan
1018 Float_t minbudget =10000;
1019 Float_t meanbudget =0;
1020 Float_t maxbudget =-1;
1021 // Float_t normbudget =0;
1022 // for (Int_t idy=-1;idy<=1;idy++)
1023 // for (Int_t idz=-1;idz<=1;idz++){
1024 for (Int_t idy=0;idy<1;idy++)
1025 for (Int_t idz=0;idz<1;idz++){
1026 Double_t y2 = y+idy*TMath::Min(TMath::Sqrt(t.GetSigmaY2()),1.);
1027 Double_t z2 = z+idz*TMath::Min(TMath::Sqrt(t.GetSigmaY2()),1.);
1028 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y2*TMath::Sin(t.GetAlpha());
1029 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y2*TMath::Cos(t.GetAlpha());
1031 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1032 Float_t budget = param[0]*param[4];
1034 if (budget<minbudget) minbudget=budget;
1035 if (budget>maxbudget) maxbudget=budget;
1037 t.fBudget[0]+=minbudget;
1038 t.fBudget[1]+=meanbudget/9.;
1039 t.fBudget[2]+=minbudget;
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());
1045 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1047 t.PropagateTo(x,param[1],param[0]);
1048 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //end global position
1054 // stop tracking for highly inclined tracks
1055 if (!AdjustSector(&t)) break;
1056 if (TMath::Abs(t.GetSnp())>0.95) break;
1058 // propagate and update track in active layers
1060 Int_t nr0 = nr; //first active layer
1061 if (nr >rf && (fTrSec[0]->GetLayer(nr)->IsSensitive())){
1062 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
1063 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
1064 while (nr >rf && ((fTrSec[0]->GetLayer(nr)->IsSensitive()))){
1065 x = fTrSec[0]->GetLayer(nr)->GetX();
1067 if (!t.GetProlongation(x,y,z)) break;
1068 if (TMath::Abs(y)>x*tanmax){
1074 x = fTrSec[0]->GetLayer(nr)->GetX();
1075 if (!t.GetProlongation(x,y,z)) break;
1076 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
1077 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
1079 // end global position
1080 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1082 radLength = param[1]; // get mean propagation parameters
1085 // propagate and update
1087 // short tracklet - do not update - edge effect
1088 x = fTrSec[0]->GetLayer(nr)->GetX();
1089 t.PropagateTo(x,radLength,rho);
1093 sector = t.GetSector();
1096 for (Int_t ilayer=nr0;ilayer>=nr;ilayer--) {
1097 expectedNumberOfClusters++;
1099 if (t.fX>345) t.fNExpectedLast++;
1100 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(ilayer));
1101 AliTRDcluster *cl=0;
1103 Double_t maxChi2=fgkMaxChi2;
1104 dx = (fTrSec[sector]->GetLayer(ilayer+1))->GetX()-timeBin.GetX();
1106 t.PropagateTo(x,radLength,rho);
1107 // Now go for the real cluster search
1109 AliTRDcluster * cl0 = timeBin[0];
1110 if (!cl0) continue; // no clusters in given time bin
1111 Int_t plane = fGeom->GetPlane(cl0->GetDetector());
1112 if (plane>lastplane) continue;
1113 Int_t timebin = cl0->GetLocalTimeBin();
1114 AliTRDcluster * cl2= GetCluster(&t,plane, timebin,index);
1118 Double_t h01 = GetTiltFactor(cl);
1119 maxChi2=t.GetPredictedChi2(cl,h01);
1123 // if (cl->GetNPads()<5)
1124 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1125 Double_t h01 = GetTiltFactor(cl);
1126 Int_t det = cl->GetDetector();
1127 Int_t plane = fGeom->GetPlane(det);
1130 t.fChi2Last+=maxChi2;
1132 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1133 if(!t.Update(cl,maxChi2,index,h01)) {
1134 //if(!tryAgain--) return 0;
1137 else tryAgain=fMaxGap;
1143 return expectedNumberOfClusters;
1148 //___________________________________________________________________
1150 Int_t AliTRDtracker::FollowBackProlongation(AliTRDtrack& t)
1152 // Starting from current radial position of track <t> this function
1153 // extrapolates the track up to outer timebin and in the sensitive
1154 // layers confirms prolongation if a close cluster is found.
1155 // Returns the number of clusters expected to be found in sensitive layers
1157 Int_t tryAgain=fMaxGap;
1159 Double_t alpha=t.GetAlpha();
1160 TVector2::Phi_0_2pi(alpha);
1164 Int_t clusters[1000];
1165 for (Int_t i=0;i<1000;i++) clusters[i]=-1;
1167 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
1168 //Double_t radLength, rho, x, dx, y, ymax = 0, z;
1169 Double_t radLength, rho, x, dx, y, z;
1170 Bool_t lookForCluster;
1171 Double_t dxsample = fgkDriftCorrection*(Double_t) fPar->GetDriftVelocity()
1172 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
1174 Int_t expectedNumberOfClusters = 0;
1177 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1182 AliTRDtracklet tracklet;
1184 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
1187 // first propagate to the outer surface of the current time bin
1190 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1191 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2;
1195 if(!t.PropagateTo(x,radLength,rho)) break;
1197 // MI -fix untill correct material desription will be implemented
1199 //Int_t nrotate = t.GetNRotate();
1200 if (!AdjustSector(&t)) break;
1207 // now propagate to the middle plane of the next time bin
1208 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1209 // if (nrotate!=t.GetNRotate()){
1210 // rho = 1000*2.7; radLength = 24.01; //TEMPORARY - aluminium in between z - will be detected using GeoModeler in future versions
1212 x = fTrSec[s]->GetLayer(nr+1)->GetX();
1213 if(!t.PropagateTo(x,radLength,rho)) break;
1214 if (!AdjustSector(&t)) break;
1216 // if(!t.PropagateTo(x,radLength,rho)) break;
1218 if (TMath::Abs(t.GetSnp())>0.95) break;
1223 if(lookForCluster) {
1224 if (clusters[nr]==-1) {
1225 Float_t ncl = FindClusters(s,nr,nr+30,&t,clusters,tracklet);
1226 ratio0 = ncl/Float_t(fTimeBinsPerPlane);
1227 Float_t ratio1 = Float_t(t.fN+1)/Float_t(t.fNExpected+1.);
1228 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){
1229 t.MakeBackupTrack(); // make backup of the track until is gold
1232 // t.PropagateTo(tracklet.GetX());
1233 // t.UpdateMI(tracklet);
1234 // nr = fTrSec[0]->GetLayerNumber(t.GetX())+1;
1239 expectedNumberOfClusters++;
1241 if (t.fX>345) t.fNExpectedLast++;
1243 AliTRDpropagationLayer& timeBin=*(fTrSec[s]->GetLayer(nr+1));
1244 Double_t sy2=ExpectedSigmaY2(t.GetX(),t.GetTgl(),t.GetPt());
1245 if((t.GetSigmaY2() + sy2) < 0) {
1246 printf("problem\n");
1249 Double_t road = 10.*sqrt(t.GetSigmaY2() + sy2);
1251 if (road>fgkWideRoad) {
1255 AliTRDcluster *cl=0;
1257 Double_t maxChi2=fgkMaxChi2;
1259 // Now go for the real cluster search
1263 if (clusters[nr+1]>0) {
1264 index = clusters[nr+1];
1265 cl = (AliTRDcluster*)GetCluster(index);
1266 Double_t h01 = GetTiltFactor(cl);
1267 maxChi2=t.GetPredictedChi2(cl,h01);
1271 // if (cl->GetNPads()<5)
1272 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1273 Double_t h01 = GetTiltFactor(cl);
1274 Int_t det = cl->GetDetector();
1275 Int_t plane = fGeom->GetPlane(det);
1278 t.fChi2Last+=maxChi2;
1280 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1281 if(!t.Update(cl,maxChi2,index,h01)) {
1282 //if(!tryAgain--) return 0;
1285 else tryAgain=fMaxGap;
1288 if (cl->GetLocalTimeBin()==1&&t.fN>20 && float(t.fChi2)/float(t.fN)<5){
1289 Float_t ratio1 = Float_t(t.fN)/Float_t(t.fNExpected);
1290 if (tracklet.GetChi2()<18&&ratio0>0.8&&ratio1>0.6 &&ratio0+ratio1>1.5 && t.GetNCross()==0 && TMath::Abs(t.GetSnp())<0.85){
1291 t.MakeBackupTrack(); // make backup of the track until is gold
1297 // if (tryAgain==0) break;
1307 return expectedNumberOfClusters;
1312 //___________________________________________________________________
1313 Int_t AliTRDtracker::FollowBackProlongationG(AliTRDtrack& t)
1316 // Starting from current radial position of track <t> this function
1317 // extrapolates the track up to outer timebin and in the sensitive
1318 // layers confirms prolongation if a close cluster is found.
1319 // Returns the number of clusters expected to be found in sensitive layers
1320 // Use GEO manager for material Description
1321 Int_t tryAgain=fMaxGap;
1323 Double_t alpha=t.GetAlpha();
1324 TVector2::Phi_0_2pi(alpha);
1326 Int_t clusters[1000];
1327 for (Int_t i=0;i<1000;i++) clusters[i]=-1;
1328 Double_t dxsample = fgkDriftCorrection*(Double_t) fPar->GetDriftVelocity()
1329 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
1330 Int_t outerTB = fTrSec[0]->GetOuterTimeBin();
1331 Double_t radLength = 0.0;
1333 Double_t x, dx; //y, z;
1335 Int_t expectedNumberOfClusters = 0;
1338 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1339 Double_t tanmax = TMath::Tan(0.5*alpha);
1342 AliTRDtracklet tracklet;
1346 for (nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr<outerTB+1; nr++) {
1348 // propagate track in non active layers
1350 if (!(fTrSec[0]->GetLayer(nr)->IsSensitive())){
1351 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
1352 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
1353 while (nr <outerTB && (!(fTrSec[0]->GetLayer(nr)->IsSensitive()))){
1354 x = fTrSec[0]->GetLayer(nr)->GetX();
1356 if (!t.GetProlongation(x,y,z)) break;
1357 if (TMath::Abs(y)>x*tanmax){
1363 x = fTrSec[0]->GetLayer(nr)->GetX();
1364 if (!t.GetProlongation(x,y,z)) break;
1365 // minimal mean and maximal budget scan
1366 Float_t minbudget =10000;
1367 Float_t meanbudget =0;
1368 Float_t maxbudget =-1;
1369 // Float_t normbudget =0;
1370 // for (Int_t idy=-1;idy<=1;idy++)
1371 // for (Int_t idz=-1;idz<=1;idz++){
1372 for (Int_t idy=0;idy<1;idy++)
1373 for (Int_t idz=0;idz<1;idz++){
1374 Double_t y2 = y+idy*TMath::Min(TMath::Sqrt(t.GetSigmaY2()),1.);
1375 Double_t z2 = z+idz*TMath::Min(TMath::Sqrt(t.GetSigmaZ2()),1.);
1377 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y2*TMath::Sin(t.GetAlpha());
1378 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y2*TMath::Cos(t.GetAlpha());
1380 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1381 Float_t budget = param[0]*param[4];
1383 if (budget<minbudget) minbudget=budget;
1384 if (budget>maxbudget) maxbudget=budget;
1386 t.fBudget[0]+=minbudget;
1387 t.fBudget[1]+=meanbudget/9.;
1388 t.fBudget[2]+=minbudget;
1390 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
1391 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
1393 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1394 t.PropagateTo(x,param[1],param[0]);
1395 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //end global position
1401 // stop tracking for highly inclined tracks
1402 if (!AdjustSector(&t)) break;
1403 if (TMath::Abs(t.GetSnp())>0.95) break;
1405 // propagate and update track in active layers
1407 Int_t nr0 = nr; //first active layer
1408 if (nr <outerTB && (fTrSec[0]->GetLayer(nr)->IsSensitive())){
1409 Double_t xyz0[3],xyz1[3],param[7],x,y,z;
1410 t.GetGlobalXYZ(xyz0[0],xyz0[1],xyz0[2]); //starting global position
1411 while (nr <outerTB && ((fTrSec[0]->GetLayer(nr)->IsSensitive()))){
1412 x = fTrSec[0]->GetLayer(nr)->GetX();
1414 if (!t.GetProlongation(x,y,z)) break;
1415 if (TMath::Abs(y)>(x*tanmax)){
1420 x = fTrSec[0]->GetLayer(nr)->GetX();
1421 if (!t.GetProlongation(x,y,z)) break;
1422 // minimal mean and maximal budget scan
1423 Float_t minbudget =10000;
1424 Float_t meanbudget =0;
1425 Float_t maxbudget =-1;
1426 // Float_t normbudget =0;
1427 // for (Int_t idy=-1;idy<=1;idy++)
1428 // for (Int_t idz=-1;idz<=1;idz++){
1429 for (Int_t idy=0;idy<1;idy++)
1430 for (Int_t idz=0;idz<1;idz++){
1431 Double_t y2 = y+idy*TMath::Min(TMath::Sqrt(t.GetSigmaY2()),1.);
1432 Double_t z2 = z+idz*TMath::Min(TMath::Sqrt(t.GetSigmaZ2()),1.);
1434 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y2*TMath::Sin(t.GetAlpha());
1435 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y2*TMath::Cos(t.GetAlpha());
1437 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1438 Float_t budget = param[0]*param[4];
1440 if (budget<minbudget) minbudget=budget;
1441 if (budget>maxbudget) maxbudget=budget;
1443 t.fBudget[0]+=minbudget;
1444 t.fBudget[1]+=meanbudget/9.;
1445 t.fBudget[2]+=minbudget;
1447 xyz1[0] = x*TMath::Cos(t.GetAlpha())-y*TMath::Sin(t.GetAlpha());
1448 xyz1[1] = +x*TMath::Sin(t.GetAlpha())+y*TMath::Cos(t.GetAlpha());
1450 // end global position
1451 AliKalmanTrack::MeanMaterialBudget(xyz0,xyz1,param);
1453 radLength = param[1]; // get mean propagation parameters
1458 // short tracklet - do not update - edge effect
1459 x = fTrSec[0]->GetLayer(nr+1)->GetX();
1460 t.PropagateTo(x,radLength,rho);
1466 sector = t.GetSector();
1467 Float_t ncl = FindClusters(sector,nr0,nr,&t,clusters,tracklet);
1468 if (tracklet.GetN()-2*tracklet.GetNCross()<10) continue;
1469 ratio0 = ncl/Float_t(fTimeBinsPerPlane);
1470 Float_t ratio1 = Float_t(t.fN+1)/Float_t(t.fNExpected+1.);
1471 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){
1472 t.MakeBackupTrack(); // make backup of the track until is gold
1476 for (Int_t ilayer=nr0;ilayer<=nr;ilayer++) {
1477 expectedNumberOfClusters++;
1479 if (t.fX>345) t.fNExpectedLast++;
1480 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(ilayer));
1481 AliTRDcluster *cl=0;
1483 Double_t maxChi2=fgkMaxChi2;
1484 dx = (fTrSec[sector]->GetLayer(ilayer-1))->GetX()-timeBin.GetX();
1486 t.PropagateTo(x,radLength,rho);
1487 // Now go for the real cluster search
1489 if (clusters[ilayer]>0) {
1490 index = clusters[ilayer];
1491 cl = (AliTRDcluster*)GetCluster(index);
1492 Double_t h01 = GetTiltFactor(cl);
1493 maxChi2=t.GetPredictedChi2(cl,h01);
1497 // if (cl->GetNPads()<5)
1498 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1499 Double_t h01 = GetTiltFactor(cl);
1500 Int_t det = cl->GetDetector();
1501 Int_t plane = fGeom->GetPlane(det);
1504 t.fChi2Last+=maxChi2;
1506 if(!t.UpdateMI(cl,maxChi2,index,h01,plane)) {
1507 if(!t.Update(cl,maxChi2,index,h01)) {
1508 //if(!tryAgain--) return 0;
1511 else tryAgain=fMaxGap;
1514 if (cl->GetLocalTimeBin()==1&&t.fN>20 && float(t.fChi2)/float(t.fN)<5){
1515 Float_t ratio1 = Float_t(t.fN)/Float_t(t.fNExpected);
1516 if (tracklet.GetChi2()<18&&ratio0>0.8&&ratio1>0.6 &&ratio0+ratio1>1.5 && t.GetNCross()==0 && TMath::Abs(t.GetSnp())<0.85){
1517 t.MakeBackupTrack(); // make backup of the track until is gold
1520 // reset material budget if 2 consecutive gold
1522 if (t.fTracklets[plane].GetN()+t.fTracklets[plane-1].GetN()>20){
1534 return expectedNumberOfClusters;
1537 //---------------------------------------------------------------------------
1538 Int_t AliTRDtracker::Refit(AliTRDtrack& t, Int_t rf)
1540 // Starting from current position on track=t this function tries
1541 // to extrapolate the track up to timeBin=0 and to reuse already
1542 // assigned clusters. Returns the number of clusters
1543 // expected to be found in sensitive layers
1544 // get indices of assigned clusters for each layer
1545 // Origin: Thomas KUHR (Thomas.Kuhr@cern.ch)
1546 Double_t dxsample = fgkDriftCorrection*(Double_t) fPar->GetDriftVelocity()
1547 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
1549 for (Int_t i = 0; i < 90; i++) iCluster[i] = 0;
1550 for (Int_t i = 0; i < t.GetNumberOfClusters(); i++) {
1551 Int_t index = t.GetClusterIndex(i);
1552 AliTRDcluster *cl=(AliTRDcluster*) GetCluster(index);
1554 Int_t detector=cl->GetDetector();
1555 Int_t localTimeBin=cl->GetLocalTimeBin();
1556 Int_t sector=fGeom->GetSector(detector);
1557 Int_t plane=fGeom->GetPlane(detector);
1559 Int_t trackingSector = CookSectorIndex(sector);
1561 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1562 if(gtb < 0) continue;
1563 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1564 iCluster[layer] = index;
1568 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1570 Double_t alpha=t.GetAlpha();
1571 alpha = TVector2::Phi_0_2pi(alpha);
1573 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1574 Double_t radLength, rho, x, dx, y, ymax, z;
1576 Int_t expectedNumberOfClusters = 0;
1577 Bool_t lookForCluster;
1579 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1582 for (Int_t nr=fTrSec[0]->GetLayerNumber(t.GetX()); nr>rf; nr--) {
1584 y = t.GetY(); z = t.GetZ();
1586 // first propagate to the inner surface of the current time bin
1587 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1588 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2; y = t.GetY(); z = t.GetZ();
1589 if(!t.PropagateTo(x,radLength,rho)) break;
1591 ymax = x*TMath::Tan(0.5*alpha);
1594 if (!t.Rotate(alpha)) break;
1595 if(!t.PropagateTo(x,radLength,rho)) break;
1596 } else if (y <-ymax) {
1598 if (!t.Rotate(-alpha)) break;
1599 if(!t.PropagateTo(x,radLength,rho)) break;
1602 y = t.GetY(); z = t.GetZ();
1604 // now propagate to the middle plane of the next time bin
1605 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1606 x = fTrSec[s]->GetLayer(nr-1)->GetX(); y = t.GetY(); z = t.GetZ();
1607 if(!t.PropagateTo(x,radLength,rho)) break;
1609 ymax = x*TMath::Tan(0.5*alpha);
1612 if (!t.Rotate(alpha)) break;
1613 if(!t.PropagateTo(x,radLength,rho)) break;
1614 } else if (y <-ymax) {
1616 if (!t.Rotate(-alpha)) break;
1617 if(!t.PropagateTo(x,radLength,rho)) break;
1620 if(lookForCluster) expectedNumberOfClusters++;
1622 // use assigned cluster
1623 if (!iCluster[nr-1]) continue;
1624 AliTRDcluster *cl=(AliTRDcluster*)GetCluster(iCluster[nr-1]);
1625 Double_t h01 = GetTiltFactor(cl);
1626 Double_t chi2=t.GetPredictedChi2(cl, h01);
1627 //if (cl->GetNPads()<5)
1628 t.SetSampledEdx(TMath::Abs(cl->GetQ()/dxsample));
1630 //t.SetSampledEdx(cl->GetQ()/dx,t.GetNumberOfClusters());
1631 t.Update(cl,chi2,iCluster[nr-1],h01);
1634 return expectedNumberOfClusters;
1637 //___________________________________________________________________
1639 Int_t AliTRDtracker::PropagateToOuterPlane(AliTRDtrack& t, Double_t xToGo)
1641 // Starting from current radial position of track <t> this function
1642 // extrapolates the track up to radial position <xToGo>.
1643 // Returns 1 if track reaches the plane, and 0 otherwise
1645 Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1647 Double_t alpha=t.GetAlpha();
1649 if (alpha > 2.*TMath::Pi()) alpha -= 2.*TMath::Pi();
1650 if (alpha < 0. ) alpha += 2.*TMath::Pi();
1652 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1654 Bool_t lookForCluster;
1655 Double_t radLength, rho, x, dx, y, ymax, z;
1659 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1661 Int_t plToGo = fTrSec[0]->GetLayerNumber(xToGo);
1663 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr<plToGo; nr++) {
1665 y = t.GetY(); z = t.GetZ();
1667 // first propagate to the outer surface of the current time bin
1668 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1669 x = fTrSec[s]->GetLayer(nr)->GetX()+dx/2; y = t.GetY(); z = t.GetZ();
1670 if(!t.PropagateTo(x,radLength,rho)) return 0;
1672 ymax = x*TMath::Tan(0.5*alpha);
1675 if (!t.Rotate(alpha)) return 0;
1676 } else if (y <-ymax) {
1678 if (!t.Rotate(-alpha)) return 0;
1680 if(!t.PropagateTo(x,radLength,rho)) return 0;
1682 y = t.GetY(); z = t.GetZ();
1684 // now propagate to the middle plane of the next time bin
1685 fTrSec[s]->GetLayer(nr+1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1686 x = fTrSec[s]->GetLayer(nr+1)->GetX(); y = t.GetY(); z = t.GetZ();
1687 if(!t.PropagateTo(x,radLength,rho)) return 0;
1689 ymax = x*TMath::Tan(0.5*alpha);
1692 if (!t.Rotate(alpha)) return 0;
1693 } else if (y <-ymax) {
1695 if (!t.Rotate(-alpha)) return 0;
1697 if(!t.PropagateTo(x,radLength,rho)) return 0;
1702 //___________________________________________________________________
1704 Int_t AliTRDtracker::PropagateToTPC(AliTRDtrack& t)
1706 // Starting from current radial position of track <t> this function
1707 // extrapolates the track up to radial position of the outermost
1708 // padrow of the TPC.
1709 // Returns 1 if track reaches the TPC, and 0 otherwise
1711 //Int_t ns=Int_t(2*TMath::Pi()/AliTRDgeometry::GetAlpha()+0.5);
1713 Double_t alpha=t.GetAlpha();
1714 alpha = TVector2::Phi_0_2pi(alpha);
1716 Int_t s=Int_t(alpha/AliTRDgeometry::GetAlpha())%AliTRDgeometry::kNsect;
1718 Bool_t lookForCluster;
1719 Double_t radLength, rho, x, dx, y, /*ymax,*/ z;
1723 alpha=AliTRDgeometry::GetAlpha(); // note: change in meaning
1724 Int_t plTPC = fTrSec[0]->GetLayerNumber(246.055);
1726 for (Int_t nr=fTrSec[0]->GetLayerNumber(x); nr>plTPC; nr--) {
1731 // first propagate to the outer surface of the current time bin
1732 fTrSec[s]->GetLayer(nr)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1733 x = fTrSec[s]->GetLayer(nr)->GetX()-dx/2;
1735 if(!t.PropagateTo(x,radLength,rho)) return 0;
1737 if(!t.PropagateTo(x,radLength,rho)) return 0;
1742 // now propagate to the middle plane of the next time bin
1743 fTrSec[s]->GetLayer(nr-1)->GetPropagationParameters(y,z,dx,rho,radLength,lookForCluster);
1744 x = fTrSec[s]->GetLayer(nr-1)->GetX();
1746 if(!t.PropagateTo(x,radLength,rho)) return 0;
1748 if(!t.PropagateTo(x,radLength,rho)) return 0;
1753 //_____________________________________________________________________________
1754 Int_t AliTRDtracker::LoadClusters(TTree *cTree)
1756 // Fills clusters into TRD tracking_sectors
1757 // Note that the numbering scheme for the TRD tracking_sectors
1758 // differs from that of TRD sectors
1759 cout<<"\n Read Sectors clusters"<<endl;
1760 if (ReadClusters(fClusters,cTree)) {
1761 Error("LoadClusters","Problem with reading the clusters !");
1764 Int_t ncl=fClusters->GetEntriesFast();
1766 cout<<"\n LoadSectors: sorting "<<ncl<<" clusters"<<endl;
1769 for (Int_t ichamber=0;ichamber<5;ichamber++)
1770 for (Int_t isector=0;isector<18;isector++){
1771 fHoles[ichamber][isector]=kTRUE;
1776 // printf("\r %d left ",ncl);
1777 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(ncl);
1778 Int_t detector=c->GetDetector();
1779 Int_t localTimeBin=c->GetLocalTimeBin();
1780 Int_t sector=fGeom->GetSector(detector);
1781 Int_t plane=fGeom->GetPlane(detector);
1783 Int_t trackingSector = CookSectorIndex(sector);
1784 if (c->GetLabel(0)>0){
1785 Int_t chamber = fGeom->GetChamber(detector);
1786 fHoles[chamber][trackingSector]=kFALSE;
1789 Int_t gtb = fTrSec[trackingSector]->CookTimeBinIndex(plane,localTimeBin);
1790 if(gtb < 0) continue;
1791 Int_t layer = fTrSec[trackingSector]->GetLayerNumber(gtb);
1795 // apply pos correction
1796 Float_t poscor = fgkCoef*(c->GetLocalTimeBin() - fgkMean)+fgkOffset;
1797 c->SetY(c->GetY()-poscor);
1798 fTrSec[trackingSector]->GetLayer(layer)->InsertCluster(c,index);
1804 for (Int_t isector=0;isector<18;isector++){
1805 for (Int_t ichamber=0;ichamber<5;ichamber++)
1806 if (fHoles[ichamber][isector]!=fGeom->IsHole(0,ichamber,17-isector))
1807 printf("Problem \t%d\t%d\t%d\t%d\n",isector,ichamber,fHoles[ichamber][isector],
1808 fGeom->IsHole(0,ichamber,17-isector));
1814 //_____________________________________________________________________________
1815 void AliTRDtracker::UnloadClusters()
1818 // Clears the arrays of clusters and tracks. Resets sectors and timebins
1823 nentr = fClusters->GetEntriesFast();
1824 for (i = 0; i < nentr; i++) delete fClusters->RemoveAt(i);
1827 nentr = fSeeds->GetEntriesFast();
1828 for (i = 0; i < nentr; i++) delete fSeeds->RemoveAt(i);
1830 nentr = fTracks->GetEntriesFast();
1831 for (i = 0; i < nentr; i++) delete fTracks->RemoveAt(i);
1833 Int_t nsec = AliTRDgeometry::kNsect;
1835 for (i = 0; i < nsec; i++) {
1836 for(Int_t pl = 0; pl < fTrSec[i]->GetNumberOfLayers(); pl++) {
1837 fTrSec[i]->GetLayer(pl)->Clear();
1843 //__________________________________________________________________________
1844 void AliTRDtracker::MakeSeeds(Int_t inner, Int_t outer, Int_t turn)
1846 // Creates track seeds using clusters in timeBins=i1,i2
1849 cerr<<"MakeSeeds: turn "<<turn<<" exceeds the limit of 2"<<endl;
1853 Double_t x[5], c[15];
1854 Int_t maxSec=AliTRDgeometry::kNsect;
1855 Double_t alpha=AliTRDgeometry::GetAlpha();
1856 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
1857 Double_t cs=cos(alpha), sn=sin(alpha);
1858 Double_t cs2=cos(2.*alpha), sn2=sin(2.*alpha);
1859 Int_t i2 = fTrSec[0]->GetLayerNumber(inner);
1860 Int_t i1 = fTrSec[0]->GetLayerNumber(outer);
1861 Double_t x1 =fTrSec[0]->GetX(i1);
1862 Double_t xx2=fTrSec[0]->GetX(i2);
1864 for (Int_t ns=0; ns<maxSec; ns++) {
1866 Int_t nl2 = *(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1867 Int_t nl=(*fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
1868 Int_t nm=(*fTrSec[ns]->GetLayer(i2));
1869 Int_t nu=(*fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1870 Int_t nu2=(*fTrSec[(ns+2)%maxSec]->GetLayer(i2));
1872 AliTRDpropagationLayer& r1=*(fTrSec[ns]->GetLayer(i1));
1874 for (Int_t is=0; is < r1; is++) {
1875 Double_t y1=r1[is]->GetY(), z1=r1[is]->GetZ();
1877 for (Int_t js=0; js < nl2+nl+nm+nu+nu2; js++) {
1879 const AliTRDcluster *cl;
1880 Double_t x2, y2, z2;
1881 Double_t x3=0., y3=0.;
1884 if(turn != 2) continue;
1885 AliTRDpropagationLayer& r2=*(fTrSec[(ns-2+maxSec)%maxSec]->GetLayer(i2));
1887 y2=cl->GetY(); z2=cl->GetZ();
1892 else if (js<nl2+nl) {
1893 if(turn != 1) continue;
1894 AliTRDpropagationLayer& r2=*(fTrSec[(ns-1+maxSec)%maxSec]->GetLayer(i2));
1896 y2=cl->GetY(); z2=cl->GetZ();
1901 else if (js<nl2+nl+nm) {
1902 if(turn != 1) continue;
1903 AliTRDpropagationLayer& r2=*(fTrSec[ns]->GetLayer(i2));
1905 x2=xx2; y2=cl->GetY(); z2=cl->GetZ();
1907 else if (js<nl2+nl+nm+nu) {
1908 if(turn != 1) continue;
1909 AliTRDpropagationLayer& r2=*(fTrSec[(ns+1)%maxSec]->GetLayer(i2));
1910 cl=r2[js-nl2-nl-nm];
1911 y2=cl->GetY(); z2=cl->GetZ();
1917 if(turn != 2) continue;
1918 AliTRDpropagationLayer& r2=*(fTrSec[(ns+2)%maxSec]->GetLayer(i2));
1919 cl=r2[js-nl2-nl-nm-nu];
1920 y2=cl->GetY(); z2=cl->GetZ();
1926 if(TMath::Abs(z1-z2) > fgkMaxSeedDeltaZ12) continue;
1928 Double_t zz=z1 - z1/x1*(x1-x2);
1930 if (TMath::Abs(zz-z2)>fgkMaxSeedDeltaZ) continue;
1932 Double_t d=(x2-x1)*(0.-y2)-(0.-x2)*(y2-y1);
1933 if (d==0.) {cerr<<"TRD MakeSeeds: Straight seed !\n"; continue;}
1937 x[4]=f1trd(x1,y1,x2,y2,x3,y3);
1939 if (TMath::Abs(x[4]) > fgkMaxSeedC) continue;
1941 x[2]=f2trd(x1,y1,x2,y2,x3,y3);
1943 if (TMath::Abs(x[4]*x1-x[2]) >= 0.99999) continue;
1945 x[3]=f3trd(x1,y1,x2,y2,z1,z2);
1947 if (TMath::Abs(x[3]) > fgkMaxSeedTan) continue;
1949 Double_t a=asin(x[2]);
1950 Double_t zv=z1 - x[3]/x[4]*(a+asin(x[4]*x1-x[2]));
1952 if (TMath::Abs(zv)>fgkMaxSeedVertexZ) continue;
1954 Double_t sy1=r1[is]->GetSigmaY2(), sz1=r1[is]->GetSigmaZ2();
1955 Double_t sy2=cl->GetSigmaY2(), sz2=cl->GetSigmaZ2();
1956 Double_t sy3=fgkSeedErrorSY3, sy=fgkSeedErrorSY, sz=fgkSeedErrorSZ;
1959 Double_t h01 = GetTiltFactor(r1[is]);
1960 Double_t xuFactor = 100.;
1966 sy1=sy1+sz1*h01*h01;
1967 Double_t syz=sz1*(-h01);
1968 // end of tilt changes
1970 Double_t f40=(f1trd(x1,y1+sy,x2,y2,x3,y3)-x[4])/sy;
1971 Double_t f42=(f1trd(x1,y1,x2,y2+sy,x3,y3)-x[4])/sy;
1972 Double_t f43=(f1trd(x1,y1,x2,y2,x3,y3+sy)-x[4])/sy;
1973 Double_t f20=(f2trd(x1,y1+sy,x2,y2,x3,y3)-x[2])/sy;
1974 Double_t f22=(f2trd(x1,y1,x2,y2+sy,x3,y3)-x[2])/sy;
1975 Double_t f23=(f2trd(x1,y1,x2,y2,x3,y3+sy)-x[2])/sy;
1976 Double_t f30=(f3trd(x1,y1+sy,x2,y2,z1,z2)-x[3])/sy;
1977 Double_t f31=(f3trd(x1,y1,x2,y2,z1+sz,z2)-x[3])/sz;
1978 Double_t f32=(f3trd(x1,y1,x2,y2+sy,z1,z2)-x[3])/sy;
1979 Double_t f34=(f3trd(x1,y1,x2,y2,z1,z2+sz)-x[3])/sz;
1983 // c[1]=0.; c[2]=sz1;
1984 c[1]=syz; c[2]=sz1*xuFactor;
1985 c[3]=f20*sy1; c[4]=0.; c[5]=f20*sy1*f20+f22*sy2*f22+f23*sy3*f23;
1986 c[6]=f30*sy1; c[7]=f31*sz1; c[8]=f30*sy1*f20+f32*sy2*f22;
1987 c[9]=f30*sy1*f30+f31*sz1*f31+f32*sy2*f32+f34*sz2*f34;
1988 c[10]=f40*sy1; c[11]=0.; c[12]=f40*sy1*f20+f42*sy2*f22+f43*sy3*f23;
1989 c[13]=f30*sy1*f40+f32*sy2*f42;
1990 c[14]=f40*sy1*f40+f42*sy2*f42+f43*sy3*f43;
1992 UInt_t index=r1.GetIndex(is);
1994 AliTRDtrack *track=new AliTRDtrack(r1[is],index,x,c,x1,ns*alpha+shift);
1996 Int_t rc=FollowProlongation(*track, i2);
1999 (track->GetNumberOfClusters() <
2000 (outer-inner)*fgkMinClustersInSeed)) delete track;
2002 fSeeds->AddLast(track); fNseeds++;
2003 // cerr<<"\r found seed "<<fNseeds;
2009 //__________________________________________________________________________
2010 void AliTRDtracker::MakeSeedsMI(Int_t /*inner*/, Int_t /*outer*/, AliESD * esd)
2013 // Creates seeds using clusters between position inner plane and outer plane
2015 const Double_t maxtheta = 1;
2016 const Double_t maxphi = 2.0;
2018 const Double_t kRoad0y = 6; // road for middle cluster
2019 const Double_t kRoad0z = 8.5; // road for middle cluster
2021 const Double_t kRoad1y = 2; // road in y for seeded cluster
2022 const Double_t kRoad1z = 20; // road in z for seeded cluster
2024 const Double_t kRoad2y = 3; // road in y for extrapolated cluster
2025 const Double_t kRoad2z = 20; // road in z for extrapolated cluster
2026 const Int_t maxseed = 3000;
2027 Int_t maxSec=AliTRDgeometry::kNsect;
2030 // linear fitters in planes
2031 TLinearFitter fitterTC(2,"hyp2"); // fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
2032 TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed
2033 fitterTC.StoreData(kTRUE);
2034 fitterT2.StoreData(kTRUE);
2035 AliRieman rieman(1000); // rieman fitter
2036 AliRieman rieman2(1000); // rieman fitter
2038 // find the maximal and minimal layer for the planes
2041 AliTRDpropagationLayer* reflayers[6];
2042 for (Int_t i=0;i<6;i++){layers[i][0]=10000; layers[i][1]=0;}
2043 for (Int_t ns=0;ns<maxSec;ns++){
2044 for (Int_t ilayer=0;ilayer<fTrSec[ns]->GetNumberOfLayers();ilayer++){
2045 AliTRDpropagationLayer& layer=*(fTrSec[ns]->GetLayer(ilayer));
2046 if (layer==0) continue;
2047 Int_t det = layer[0]->GetDetector();
2048 Int_t plane = fGeom->GetPlane(det);
2049 if (ilayer<layers[plane][0]) layers[plane][0] = ilayer;
2050 if (ilayer>layers[plane][1]) layers[plane][1] = ilayer;
2054 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(0,0);
2055 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
2056 Double_t hL[6]; // tilting angle
2057 Double_t xcl[6]; // x - position of reference cluster
2058 Double_t ycl[6]; // y - position of reference cluster
2059 Double_t zcl[6]; // z - position of reference cluster
2060 AliTRDcluster *cl[6]={0,0,0,0,0,0}; // seeding clusters
2061 Float_t padlength[6]={10,10,10,10,10,10}; //current pad-length
2062 Double_t chi2R =0, chi2Z=0;
2063 Double_t chi2RF =0, chi2ZF=0;
2065 Int_t nclusters; // total number of clusters
2066 for (Int_t i=0;i<6;i++) {hL[i]=h01; if (i%2==1) hL[i]*=-1.;}
2070 AliTRDseed *pseed = new AliTRDseed[maxseed*6];
2071 AliTRDseed *seed[maxseed];
2072 for (Int_t iseed=0;iseed<maxseed;iseed++) seed[iseed]= &pseed[iseed*6];
2073 AliTRDseed *cseed = seed[0];
2075 Double_t seedquality[maxseed];
2076 Double_t seedquality2[maxseed];
2077 Double_t seedparams[maxseed][7];
2078 Int_t seedlayer[maxseed];
2079 Int_t registered =0;
2080 Int_t sort[maxseed];
2084 for (Int_t ns = 0; ns<maxSec; ns++){ //loop over sectors
2085 //for (Int_t ns = 0; ns<5; ns++){ //loop over sectors
2086 registered = 0; // reset registerd seed counter
2087 cseed = seed[registered];
2089 for (Int_t sLayer=2; sLayer>=0;sLayer--){
2090 //for (Int_t dseed=5;dseed<15; dseed+=3){ //loop over central seeding time bins
2092 Int_t dseed = 5+Int_t(iter)*3;
2093 // Initialize seeding layers
2094 for (Int_t ilayer=0;ilayer<6;ilayer++){
2095 reflayers[ilayer] = fTrSec[ns]->GetLayer(layers[ilayer][1]-dseed);
2096 xcl[ilayer] = reflayers[ilayer]->GetX();
2099 Double_t xref = (xcl[sLayer+1] + xcl[sLayer+2])*0.5;
2100 AliTRDpropagationLayer& layer0=*reflayers[sLayer+0];
2101 AliTRDpropagationLayer& layer1=*reflayers[sLayer+1];
2102 AliTRDpropagationLayer& layer2=*reflayers[sLayer+2];
2103 AliTRDpropagationLayer& layer3=*reflayers[sLayer+3];
2105 Int_t maxn3 = layer3;
2106 for (Int_t icl3=0;icl3<maxn3;icl3++){
2107 AliTRDcluster *cl3 = layer3[icl3];
2109 padlength[sLayer+3] = TMath::Sqrt(cl3->GetSigmaZ2()*12.);
2110 ycl[sLayer+3] = cl3->GetY();
2111 zcl[sLayer+3] = cl3->GetZ();
2112 Float_t yymin0 = ycl[sLayer+3] - 1- maxphi *(xcl[sLayer+3]-xcl[sLayer+0]);
2113 Float_t yymax0 = ycl[sLayer+3] + 1+ maxphi *(xcl[sLayer+3]-xcl[sLayer+0]);
2114 Int_t maxn0 = layer0; //
2115 for (Int_t icl0=layer0.Find(yymin0);icl0<maxn0;icl0++){
2116 AliTRDcluster *cl0 = layer0[icl0];
2118 if (cl3->IsUsed()&&cl0->IsUsed()) continue;
2119 ycl[sLayer+0] = cl0->GetY();
2120 zcl[sLayer+0] = cl0->GetZ();
2121 if ( ycl[sLayer+0]>yymax0) break;
2122 Double_t tanphi = (ycl[sLayer+3]-ycl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]);
2123 if (TMath::Abs(tanphi)>maxphi) continue;
2124 Double_t tantheta = (zcl[sLayer+3]-zcl[sLayer+0])/(xcl[sLayer+3]-xcl[sLayer+0]);
2125 if (TMath::Abs(tantheta)>maxtheta) continue;
2126 padlength[sLayer+0] = TMath::Sqrt(cl0->GetSigmaZ2()*12.);
2128 // expected position in 1 layer
2129 Double_t y1exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+1]-xcl[sLayer+0]);
2130 Double_t z1exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+1]-xcl[sLayer+0]);
2131 Float_t yymin1 = y1exp - kRoad0y-tanphi;
2132 Float_t yymax1 = y1exp + kRoad0y+tanphi;
2133 Int_t maxn1 = layer1; //
2135 for (Int_t icl1=layer1.Find(yymin1);icl1<maxn1;icl1++){
2136 AliTRDcluster *cl1 = layer1[icl1];
2139 if (cl3->IsUsed()) nusedCl++;
2140 if (cl0->IsUsed()) nusedCl++;
2141 if (cl1->IsUsed()) nusedCl++;
2142 if (nusedCl>1) continue;
2143 ycl[sLayer+1] = cl1->GetY();
2144 zcl[sLayer+1] = cl1->GetZ();
2145 if ( ycl[sLayer+1]>yymax1) break;
2146 if (TMath::Abs(ycl[sLayer+1]-y1exp)>kRoad0y+tanphi) continue;
2147 if (TMath::Abs(zcl[sLayer+1]-z1exp)>kRoad0z) continue;
2148 padlength[sLayer+1] = TMath::Sqrt(cl1->GetSigmaZ2()*12.);
2150 Double_t y2exp = ycl[sLayer+0]+(tanphi) *(xcl[sLayer+2]-xcl[sLayer+0])+(ycl[sLayer+1]-y1exp);
2151 Double_t z2exp = zcl[sLayer+0]+(tantheta)*(xcl[sLayer+2]-xcl[sLayer+0]);
2152 Int_t index2 = layer2.FindNearestCluster(y2exp,z2exp,kRoad1y, kRoad1z);
2153 if (index2<=0) continue;
2154 AliTRDcluster *cl2 = (AliTRDcluster*)GetCluster(index2);
2155 padlength[sLayer+2] = TMath::Sqrt(cl2->GetSigmaZ2()*12.);
2156 ycl[sLayer+2] = cl2->GetY();
2157 zcl[sLayer+2] = cl2->GetZ();
2158 if (TMath::Abs(cl2->GetZ()-z2exp)>kRoad0z) continue;
2161 rieman.AddPoint(xcl[sLayer+0],ycl[sLayer+0],zcl[sLayer+0],1,10);
2162 rieman.AddPoint(xcl[sLayer+1],ycl[sLayer+1],zcl[sLayer+1],1,10);
2163 rieman.AddPoint(xcl[sLayer+3],ycl[sLayer+3],zcl[sLayer+3],1,10);
2164 rieman.AddPoint(xcl[sLayer+2],ycl[sLayer+2],zcl[sLayer+2],1,10);
2168 for (Int_t iLayer=0;iLayer<6;iLayer++){
2169 cseed[iLayer].Reset();
2171 chi2Z =0.; chi2R=0.;
2172 for (Int_t iLayer=0;iLayer<4;iLayer++){
2173 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
2174 chi2Z += (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer])*
2175 (cseed[sLayer+iLayer].fZref[0]- zcl[sLayer+iLayer]);
2176 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
2177 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
2178 chi2R += (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer])*
2179 (cseed[sLayer+iLayer].fYref[0]- ycl[sLayer+iLayer]);
2180 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
2182 if (TMath::Sqrt(chi2R)>1./iter) continue;
2183 if (TMath::Sqrt(chi2Z)>7./iter) continue;
2187 Float_t minmax[2]={-100,100};
2188 for (Int_t iLayer=0;iLayer<4;iLayer++){
2189 Float_t max = zcl[sLayer+iLayer]+padlength[sLayer+iLayer]*0.5+1 -cseed[sLayer+iLayer].fZref[0];
2190 if (max<minmax[1]) minmax[1]=max;
2191 Float_t min = zcl[sLayer+iLayer]-padlength[sLayer+iLayer]*0.5-1 -cseed[sLayer+iLayer].fZref[0];
2192 if (min>minmax[0]) minmax[0]=min;
2194 Bool_t isFake = kFALSE;
2195 if (cl0->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
2196 if (cl1->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
2197 if (cl2->GetLabel(0)!=cl3->GetLabel(0)) isFake = kTRUE;
2198 if ((!isFake) || (icl3%10)==0 ){ //debugging print
2199 TTreeSRedirector& cstream = *fDebugStreamer;
2207 "X0="<<xcl[sLayer+0]<<
2208 "X1="<<xcl[sLayer+1]<<
2209 "X2="<<xcl[sLayer+2]<<
2210 "X3="<<xcl[sLayer+3]<<
2215 "Seed0.="<<&cseed[sLayer+0]<<
2216 "Seed1.="<<&cseed[sLayer+1]<<
2217 "Seed2.="<<&cseed[sLayer+2]<<
2218 "Seed3.="<<&cseed[sLayer+3]<<
2219 "Zmin="<<minmax[0]<<
2220 "Zmax="<<minmax[1]<<
2224 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
2225 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
2226 //<<<<<<<<<<<<<<<<<< FIT SEEDING PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
2227 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
2233 for (Int_t jLayer=0;jLayer<4;jLayer++){
2234 cseed[sLayer+jLayer].fTilt = hL[sLayer+jLayer];
2235 cseed[sLayer+jLayer].fPadLength = padlength[sLayer+jLayer];
2236 cseed[sLayer+jLayer].fX0 = xcl[sLayer+jLayer];
2237 for (Int_t iter=0; iter<2; iter++){
2239 // in iteration 0 we try only one pad-row
2240 // if quality not sufficient we try 2 pad-rows - about 5% of tracks cross 2 pad-rows
2242 AliTRDseed tseed = cseed[sLayer+jLayer];
2243 Float_t roadz = padlength[sLayer+jLayer]*0.5;
2244 if (iter>0) roadz = padlength[sLayer+jLayer];
2246 Float_t quality =10000;
2247 for (Int_t iTime=2;iTime<20;iTime++){
2248 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[sLayer+jLayer][1]-iTime));
2249 Double_t dxlayer= layer.GetX()-xcl[sLayer+jLayer];
2250 Double_t zexp = cl[sLayer+jLayer]->GetZ() ;
2252 // try 2 pad-rows in second iteration
2253 zexp = tseed.fZref[0]+ tseed.fZref[1]*dxlayer;
2254 if (zexp>cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()+padlength[sLayer+jLayer]*0.5;
2255 if (zexp<cl[sLayer+jLayer]->GetZ()) zexp = cl[sLayer+jLayer]->GetZ()-padlength[sLayer+jLayer]*0.5;
2258 Double_t yexp = tseed.fYref[0]+
2259 tseed.fYref[1]*dxlayer;
2260 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz);
2261 if (index<=0) continue;
2262 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
2264 tseed.fIndexes[iTime] = index;
2265 tseed.fClusters[iTime] = cl; // register cluster
2266 tseed.fX[iTime] = dxlayer; // register cluster
2267 tseed.fY[iTime] = cl->GetY(); // register cluster
2268 tseed.fZ[iTime] = cl->GetZ(); // register cluster
2271 //count the number of clusters and distortions into quality
2272 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
2273 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
2274 TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+
2275 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
2276 if (iter==0 && tseed.isOK()) {
2277 cseed[sLayer+jLayer] = tseed;
2279 if (tquality<5) break;
2281 if (tseed.isOK() && tquality<quality)
2282 cseed[sLayer+jLayer] = tseed;
2284 if (!cseed[sLayer+jLayer].isOK()){
2288 cseed[sLayer+jLayer].CookLabels();
2289 cseed[sLayer+jLayer].UpdateUsed();
2290 nusedCl+= cseed[sLayer+jLayer].fNUsed;
2297 if (!isOK) continue;
2299 for (Int_t iLayer=0;iLayer<4;iLayer++){
2300 if (cseed[sLayer+iLayer].isOK()){
2301 nclusters+=cseed[sLayer+iLayer].fN2;
2307 for (Int_t iLayer=0;iLayer<4;iLayer++){
2308 rieman.AddPoint(xcl[sLayer+iLayer],cseed[sLayer+iLayer].fYfitR[0],
2309 cseed[sLayer+iLayer].fZProb,1,10);
2315 for (Int_t iLayer=0;iLayer<4;iLayer++){
2316 cseed[sLayer+iLayer].fYref[0] = rieman.GetYat(xcl[sLayer+iLayer]);
2317 chi2R += (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0])*
2318 (cseed[sLayer+iLayer].fYref[0]-cseed[sLayer+iLayer].fYfitR[0]);
2319 cseed[sLayer+iLayer].fYref[1] = rieman.GetDYat(xcl[sLayer+iLayer]);
2320 cseed[sLayer+iLayer].fZref[0] = rieman.GetZat(xcl[sLayer+iLayer]);
2321 chi2Z += (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz)*
2322 (cseed[sLayer+iLayer].fZref[0]- cseed[sLayer+iLayer].fMeanz);
2323 cseed[sLayer+iLayer].fZref[1] = rieman.GetDZat(xcl[sLayer+iLayer]);
2325 Double_t curv = rieman.GetC();
2330 TMath::Abs(cseed[sLayer+0].fYfitR[1]- cseed[sLayer+0].fYref[1])+
2331 TMath::Abs(cseed[sLayer+1].fYfitR[1]- cseed[sLayer+1].fYref[1])+
2332 TMath::Abs(cseed[sLayer+2].fYfitR[1]- cseed[sLayer+2].fYref[1])+
2333 TMath::Abs(cseed[sLayer+3].fYfitR[1]- cseed[sLayer+3].fYref[1]);
2334 Double_t likea = TMath::Exp(-sumda*10.6);
2335 Double_t likechi2 = 0.0000000001;
2336 if (chi2R<0.5) likechi2+=TMath::Exp(-TMath::Sqrt(chi2R)*7.73);
2337 Double_t likechi2z = TMath::Exp(-chi2Z*0.088)/TMath::Exp(-chi2Z*0.019);
2338 Double_t likeN = TMath::Exp(-(72-nclusters)*0.19);
2339 Double_t like = likea*likechi2*likechi2z*likeN;
2341 Double_t likePrimY = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fYref[1]-130*curv)*1.9);
2342 Double_t likePrimZ = TMath::Exp(-TMath::Abs(cseed[sLayer+0].fZref[1]-
2343 cseed[sLayer+0].fZref[0]/xcl[sLayer+0])*5.9);
2344 Double_t likePrim = TMath::Max(likePrimY*likePrimZ,0.0005);
2346 seedquality[registered] = like;
2347 seedlayer[registered] = sLayer;
2348 if (TMath::Log(0.000000000000001+like)<-15) continue;
2349 AliTRDseed seedb[6];
2350 for (Int_t iLayer=0;iLayer<6;iLayer++){
2351 seedb[iLayer] = cseed[iLayer];
2354 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
2355 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
2356 //<<<<<<<<<<<<<<< FULL TRACK FIT PART <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
2357 //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
2363 // add new layers - avoid long extrapolation
2365 Int_t tLayer[2]={0,0};
2366 if (sLayer==2) {tLayer[0]=1; tLayer[1]=0;}
2367 if (sLayer==1) {tLayer[0]=5; tLayer[1]=0;}
2368 if (sLayer==0) {tLayer[0]=4; tLayer[1]=5;}
2370 for (Int_t iLayer=0;iLayer<2;iLayer++){
2371 Int_t jLayer = tLayer[iLayer]; // set tracking layer
2372 cseed[jLayer].Reset();
2373 cseed[jLayer].fTilt = hL[jLayer];
2374 cseed[jLayer].fPadLength = padlength[jLayer];
2375 cseed[jLayer].fX0 = xcl[jLayer];
2376 // get pad length and rough cluster
2377 Int_t indexdummy = reflayers[jLayer]->FindNearestCluster(cseed[jLayer].fYref[0],
2378 cseed[jLayer].fZref[0],kRoad2y,kRoad2z);
2379 if (indexdummy<=0) continue;
2380 AliTRDcluster *cldummy = (AliTRDcluster*)GetCluster(indexdummy);
2381 padlength[jLayer] = TMath::Sqrt(cldummy->GetSigmaZ2()*12.);
2383 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
2385 for (Int_t iLayer=0;iLayer<2;iLayer++){
2386 Int_t jLayer = tLayer[iLayer]; // set tracking layer
2387 if ( (jLayer==0) && !(cseed[1].isOK())) continue; // break not allowed
2388 if ( (jLayer==5) && !(cseed[4].isOK())) continue; // break not allowed
2389 Float_t zexp = cseed[jLayer].fZref[0];
2390 Double_t zroad = padlength[jLayer]*0.5+1.;
2393 for (Int_t iter=0;iter<2;iter++){
2394 AliTRDseed tseed = cseed[jLayer];
2395 Float_t quality = 10000;
2396 for (Int_t iTime=2;iTime<20;iTime++){
2397 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[jLayer][1]-iTime));
2398 Double_t dxlayer = layer.GetX()-xcl[jLayer];
2399 Double_t yexp = tseed.fYref[0]+tseed.fYref[1]*dxlayer;
2400 Float_t yroad = kRoad1y;
2401 Int_t index = layer.FindNearestCluster(yexp,zexp, yroad, zroad);
2402 if (index<=0) continue;
2403 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
2405 tseed.fIndexes[iTime] = index;
2406 tseed.fClusters[iTime] = cl; // register cluster
2407 tseed.fX[iTime] = dxlayer; // register cluster
2408 tseed.fY[iTime] = cl->GetY(); // register cluster
2409 tseed.fZ[iTime] = cl->GetZ(); // register cluster
2413 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
2414 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
2415 TMath::Abs(tseed.fYfit[0]-tseed.fYref[0])/0.2+
2416 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
2418 if (tquality<quality){
2419 cseed[jLayer]=tseed;
2425 if ( cseed[jLayer].isOK()){
2426 cseed[jLayer].CookLabels();
2427 cseed[jLayer].UpdateUsed();
2428 nusedf+= cseed[jLayer].fNUsed;
2429 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
2435 AliTRDseed bseed[6];
2436 for (Int_t jLayer=0;jLayer<6;jLayer++){
2437 bseed[jLayer] = cseed[jLayer];
2439 Float_t lastquality = 10000;
2440 Float_t lastchi2 = 10000;
2441 Float_t chi2 = 1000;
2444 for (Int_t iter =0; iter<4;iter++){
2446 // sort tracklets according "quality", try to "improve" 4 worst
2448 Float_t sumquality = 0;
2449 Float_t squality[6];
2450 Int_t sortindexes[6];
2451 for (Int_t jLayer=0;jLayer<6;jLayer++){
2452 if (bseed[jLayer].isOK()){
2453 AliTRDseed &tseed = bseed[jLayer];
2454 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
2455 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
2456 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
2457 TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+
2458 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
2459 squality[jLayer] = tquality;
2461 else squality[jLayer]=-1;
2462 sumquality +=squality[jLayer];
2465 if (sumquality>=lastquality || chi2>lastchi2) break;
2466 lastquality = sumquality;
2469 for (Int_t jLayer=0;jLayer<6;jLayer++){
2470 cseed[jLayer] = bseed[jLayer];
2473 TMath::Sort(6,squality,sortindexes,kFALSE);
2476 for (Int_t jLayer=5;jLayer>1;jLayer--){
2477 Int_t bLayer = sortindexes[jLayer];
2478 AliTRDseed tseed = bseed[bLayer];
2479 for (Int_t iTime=2;iTime<20;iTime++){
2480 AliTRDpropagationLayer& layer = *(fTrSec[ns]->GetLayer(layers[bLayer][1]-iTime));
2481 Double_t dxlayer= layer.GetX()-xcl[bLayer];
2483 Double_t zexp = tseed.fZref[0];
2484 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
2486 Float_t roadz = padlength[bLayer]+1;
2487 if (TMath::Abs(tseed.fZProb-zexp)> padlength[bLayer]*0.5) {roadz = padlength[bLayer]*0.5;}
2488 if (tseed.fZfit[1]*tseed.fZref[1]<0) {roadz = padlength[bLayer]*0.5;}
2489 if (TMath::Abs(tseed.fZProb-zexp)<0.1*padlength[bLayer]) {
2490 zexp = tseed.fZProb;
2491 roadz = padlength[bLayer]*0.5;
2494 Double_t yexp = tseed.fYref[0]+
2495 tseed.fYref[1]*dxlayer-zcor;
2496 Int_t index = layer.FindNearestCluster(yexp,zexp,kRoad1y, roadz);
2497 if (index<=0) continue;
2498 AliTRDcluster *cl = (AliTRDcluster*)GetCluster(index);
2500 tseed.fIndexes[iTime] = index;
2501 tseed.fClusters[iTime] = cl; // register cluster
2502 tseed.fX[iTime] = dxlayer; // register cluster
2503 tseed.fY[iTime] = cl->GetY(); // register cluster
2504 tseed.fZ[iTime] = cl->GetZ(); // register cluster
2508 Float_t dangle = tseed.fYfit[1]-tseed.fYref[1];
2509 Double_t zcor = tseed.fTilt*(tseed.fZProb-tseed.fZref[0]);
2511 Float_t tquality = (18-tseed.fN2)/2. + TMath::Abs(dangle)/0.1+
2512 TMath::Abs(tseed.fYfit[0]-(tseed.fYref[0]-zcor))/0.2+
2513 2.*TMath::Abs(tseed.fMeanz-tseed.fZref[0])/padlength[jLayer];
2515 if (tquality<squality[bLayer])
2516 bseed[bLayer] = tseed;
2519 chi2 = AliTRDseed::FitRiemanTilt(bseed, kTRUE);
2527 for (Int_t iLayer=0;iLayer<6;iLayer++) {
2528 if (TMath::Abs(cseed[iLayer].fYref[0]/cseed[iLayer].fX0)<0.15)
2530 if (cseed[iLayer].isOK()){
2531 nclusters+=cseed[iLayer].fN2;
2535 if (nlayers<3) continue;
2537 for (Int_t iLayer=0;iLayer<6;iLayer++){
2538 if (cseed[iLayer].isOK()) rieman.AddPoint(xcl[iLayer],cseed[iLayer].fYfitR[0],
2539 cseed[iLayer].fZProb,1,10);
2545 for (Int_t iLayer=0;iLayer<6;iLayer++){
2546 if (cseed[iLayer].isOK()){
2547 cseed[iLayer].fYref[0] = rieman.GetYat(xcl[iLayer]);
2548 chi2RF += (cseed[iLayer].fYref[0]-cseed[iLayer].fYfitR[0])*
2549 (cseed[iLayer].fYref[0]-cseed[iLayer].fYfitR[0]);
2550 cseed[iLayer].fYref[1] = rieman.GetDYat(xcl[iLayer]);
2551 cseed[iLayer].fZref[0] = rieman.GetZat(xcl[iLayer]);
2552 chi2ZF += (cseed[iLayer].fZref[0]- cseed[iLayer].fMeanz)*
2553 (cseed[iLayer].fZref[0]- cseed[iLayer].fMeanz);
2554 cseed[iLayer].fZref[1] = rieman.GetDZat(xcl[iLayer]);
2557 chi2RF/=TMath::Max((nlayers-3.),1.);
2558 chi2ZF/=TMath::Max((nlayers-3.),1.);
2559 curv = rieman.GetC();
2563 Double_t xref2 = (xcl[2]+xcl[3])*0.5; // middle of the chamber
2564 Double_t dzmf = rieman.GetDZat(xref2);
2565 Double_t zmf = rieman.GetZat(xref2);
2570 fitterTC.ClearPoints();
2571 fitterT2.ClearPoints();
2573 for (Int_t iLayer=0; iLayer<6;iLayer++){
2574 if (!cseed[iLayer].isOK()) continue;
2575 for (Int_t itime=0;itime<25;itime++){
2576 if (!cseed[iLayer].fUsable[itime]) continue;
2577 Double_t x = cseed[iLayer].fX[itime]+cseed[iLayer].fX0-xref2; // x relative to the midle chamber
2578 Double_t y = cseed[iLayer].fY[itime];
2579 Double_t z = cseed[iLayer].fZ[itime];
2580 // ExB correction to the correction
2584 Double_t x2 = cseed[iLayer].fX[itime]+cseed[iLayer].fX0; // global x
2586 Double_t t = 1./(x2*x2+y*y);
2588 uvt[0] = 2.*x2*uvt[1]; // u
2590 uvt[2] = 2.0*hL[iLayer]*uvt[1];
2591 uvt[3] = 2.0*hL[iLayer]*x*uvt[1];
2592 uvt[4] = 2.0*(y+hL[iLayer]*z)*uvt[1];
2594 Double_t error = 2*0.2*uvt[1];
2595 fitterT2.AddPoint(uvt,uvt[4],error);
2597 // constrained rieman
2599 z =cseed[iLayer].fZ[itime];
2600 uvt[0] = 2.*x2*t; // u
2601 uvt[1] = 2*hL[iLayer]*x2*uvt[1];
2602 uvt[2] = 2*(y+hL[iLayer]*(z-GetZ()))*t;
2603 fitterTC.AddPoint(uvt,uvt[2],error);
2605 rieman2.AddPoint(x2,y,z,1,10);
2612 Double_t rpolz0 = fitterT2.GetParameter(3);
2613 Double_t rpolz1 = fitterT2.GetParameter(4);
2615 // linear fitter - not possible to make boundaries
2616 // non accept non possible z and dzdx combination
2618 Bool_t acceptablez =kTRUE;
2619 for (Int_t iLayer=0; iLayer<6;iLayer++){
2620 if (cseed[iLayer].isOK()){
2621 Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2);
2622 if (TMath::Abs(cseed[iLayer].fZProb-zT2)>padlength[iLayer]*0.5+1)
2623 acceptablez = kFALSE;
2627 fitterT2.FixParameter(3,zmf);
2628 fitterT2.FixParameter(4,dzmf);
2630 fitterT2.ReleaseParameter(3);
2631 fitterT2.ReleaseParameter(4);
2632 rpolz0 = fitterT2.GetParameter(3);
2633 rpolz1 = fitterT2.GetParameter(4);
2636 Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT);
2637 Double_t chi2TC = fitterTC.GetChisquare()/Float_t(npointsT);
2639 Double_t polz1c = fitterTC.GetParameter(2);
2640 Double_t polz0c = polz1c*xref2;
2642 Double_t aC = fitterTC.GetParameter(0);
2643 Double_t bC = fitterTC.GetParameter(1);
2644 Double_t CC = aC/TMath::Sqrt(bC*bC+1.); // curvature
2646 Double_t aR = fitterT2.GetParameter(0);
2647 Double_t bR = fitterT2.GetParameter(1);
2648 Double_t dR = fitterT2.GetParameter(2);
2649 Double_t CR = 1+bR*bR-dR*aR;
2652 dca = -dR/(TMath::Sqrt(1+bR*bR-dR*aR)+TMath::Sqrt(1+bR*bR));
2653 CR = aR/TMath::Sqrt(CR);
2656 Double_t chi2ZT2=0, chi2ZTC=0;
2657 for (Int_t iLayer=0; iLayer<6;iLayer++){
2658 if (cseed[iLayer].isOK()){
2659 Double_t zT2 = rpolz0+rpolz1*(xcl[iLayer] - xref2);
2660 Double_t zTC = polz0c+polz1c*(xcl[iLayer] - xref2);
2661 chi2ZT2 += TMath::Abs(cseed[iLayer].fMeanz-zT2);
2662 chi2ZTC += TMath::Abs(cseed[iLayer].fMeanz-zTC);
2665 chi2ZT2/=TMath::Max((nlayers-3.),1.);
2666 chi2ZTC/=TMath::Max((nlayers-3.),1.);
2670 AliTRDseed::FitRiemanTilt(cseed, kTRUE);
2672 for (Int_t iLayer=0;iLayer<6;iLayer++){
2673 if (cseed[iLayer].isOK())
2674 sumdaf += TMath::Abs((cseed[iLayer].fYfit[1]-cseed[iLayer].fYref[1])/cseed[iLayer].fSigmaY2);
2676 sumdaf /= Float_t (nlayers-2.);
2678 // likelihoods for full track
2680 Double_t likezf = TMath::Exp(-chi2ZF*0.14);
2681 Double_t likechi2C = TMath::Exp(-chi2TC*0.677);
2682 Double_t likechi2TR = TMath::Exp(-chi2TR*0.78);
2683 Double_t likeaf = TMath::Exp(-sumdaf*3.23);
2684 seedquality2[registered] = likezf*likechi2TR*likeaf;
2685 // Bool_t isGold = kFALSE;
2687 // if (nlayers == 6 && TMath::Log(0.000000001+seedquality2[index])<-5.) isGold =kTRUE; // gold
2688 // if (nlayers == findable && TMath::Log(0.000000001+seedquality2[index])<-4.) isGold =kTRUE; // gold
2689 // if (isGold &&nusedf<10){
2690 // for (Int_t jLayer=0;jLayer<6;jLayer++){
2691 // if ( seed[index][jLayer].isOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.1)
2692 // seed[index][jLayer].UseClusters(); //sign gold
2699 if (!cseed[0].isOK()){
2701 if (!cseed[1].isOK()) index0 = 2;
2703 seedparams[registered][0] = cseed[index0].fX0;
2704 seedparams[registered][1] = cseed[index0].fYref[0];
2705 seedparams[registered][2] = cseed[index0].fZref[0];
2706 seedparams[registered][5] = CR;
2707 seedparams[registered][3] = cseed[index0].fX0*CR - TMath::Sin(TMath::ATan(cseed[0].fYref[1]));
2708 seedparams[registered][4] = cseed[index0].fZref[1]/
2709 TMath::Sqrt(1+cseed[index0].fYref[1]*cseed[index0].fYref[1]);
2710 seedparams[registered][6] = ns;
2713 Int_t labels[12], outlab[24];
2715 for (Int_t iLayer=0;iLayer<6;iLayer++){
2716 if (!cseed[iLayer].isOK()) continue;
2717 if (cseed[iLayer].fLabels[0]>=0) {
2718 labels[nlab] = cseed[iLayer].fLabels[0];
2721 if (cseed[iLayer].fLabels[1]>=0) {
2722 labels[nlab] = cseed[iLayer].fLabels[1];
2726 Freq(nlab,labels,outlab,kFALSE);
2727 Int_t label = outlab[0];
2728 Int_t frequency = outlab[1];
2729 for (Int_t iLayer=0;iLayer<6;iLayer++){
2730 cseed[iLayer].fFreq = frequency;
2731 cseed[iLayer].fC = CR;
2732 cseed[iLayer].fCC = CC;
2733 cseed[iLayer].fChi2 = chi2TR;
2734 cseed[iLayer].fChi2Z = chi2ZF;
2737 if (1||(!isFake)){ //debugging print
2738 Float_t zvertex = GetZ();
2739 TTreeSRedirector& cstream = *fDebugStreamer;
2742 "Vertex="<<zvertex<<
2743 "Rieman2.="<<&rieman2<<
2744 "Rieman.="<<&rieman<<
2754 "Chi2RF="<<chi2RF<< //chi2 of trackletes on full track
2755 "Chi2ZF="<<chi2ZF<< //chi2 z on tracklets on full track
2756 "Chi2ZT2="<<chi2ZT2<< //chi2 z on tracklets on full track - rieman tilt
2757 "Chi2ZTC="<<chi2ZTC<< //chi2 z on tracklets on full track - rieman tilt const
2759 "Chi2TR="<<chi2TR<< //chi2 without vertex constrain
2760 "Chi2TC="<<chi2TC<< //chi2 with vertex constrain
2761 "C="<<curv<< // non constrained - no tilt correction
2762 "DR="<<dR<< // DR parameter - tilt correction
2763 "DCA="<<dca<< // DCA - tilt correction
2764 "CR="<<CR<< // non constrained curvature - tilt correction
2765 "CC="<<CC<< // constrained curvature
2771 "Nlayers="<<nlayers<<
2772 "NUsedS="<<nusedCl<<
2774 "Findable="<<findable<<
2776 "LikePrim="<<likePrim<<
2777 "Likechi2C="<<likechi2C<<
2778 "Likechi2TR="<<likechi2TR<<
2780 "LikeF="<<seedquality2[registered]<<
2787 "SB0.="<<&seedb[0]<<
2788 "SB1.="<<&seedb[1]<<
2789 "SB2.="<<&seedb[2]<<
2790 "SB3.="<<&seedb[3]<<
2791 "SB4.="<<&seedb[4]<<
2792 "SB5.="<<&seedb[5]<<
2794 "Freq="<<frequency<<
2798 if (registered<maxseed-1) {
2800 cseed = seed[registered];
2802 }// end of loop over layer 1
2803 } // end of loop over layer 0
2804 } // end of loop over layer 3
2805 } // end of loop over seeding time bins
2809 TMath::Sort(registered,seedquality2,sort,kTRUE);
2810 Bool_t signedseed[maxseed];
2811 for (Int_t i=0;i<registered;i++){
2812 signedseed[i]= kFALSE;
2814 for (Int_t iter=0; iter<5; iter++){
2815 for (Int_t iseed=0;iseed<registered;iseed++){
2816 Int_t index = sort[iseed];
2817 if (signedseed[index]) continue;
2818 Int_t labelsall[1000];
2821 Int_t sLayer = seedlayer[index];
2826 for (Int_t jLayer=0;jLayer<6;jLayer++){
2827 if (TMath::Abs(seed[index][jLayer].fYref[0]/xcl[jLayer])<0.15)
2829 if (seed[index][jLayer].isOK()){
2830 seed[index][jLayer].UpdateUsed();
2831 ncl +=seed[index][jLayer].fN2;
2832 nused +=seed[index][jLayer].fNUsed;
2835 for (Int_t itime=0;itime<25;itime++){
2836 if (seed[index][jLayer].fUsable[itime]){
2838 for (Int_t ilab=0;ilab<3;ilab++){
2839 Int_t tindex = seed[index][jLayer].fClusters[itime]->GetLabel(ilab);
2841 labelsall[nlabelsall] = tindex;
2850 if (nused>30) continue;
2853 if (nlayers<6) continue;
2854 if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue; // gold
2858 if (nlayers<findable) continue;
2859 if (TMath::Log(0.000000001+seedquality2[index])<-4.) continue; //
2864 if (nlayers==findable || nlayers==6) continue;
2865 if (TMath::Log(0.000000001+seedquality2[index])<-6.) continue;
2869 if (TMath::Log(0.000000001+seedquality2[index])<-5.) continue;
2873 if (TMath::Log(0.000000001+seedquality2[index])-nused/(nlayers-3.)<-15.) continue;
2876 signedseed[index] = kTRUE;
2878 Int_t labels[1000], outlab[1000];
2880 for (Int_t iLayer=0;iLayer<6;iLayer++){
2881 if (seed[index][iLayer].isOK()){
2882 if (seed[index][iLayer].fLabels[0]>=0) {
2883 labels[nlab] = seed[index][iLayer].fLabels[0];
2886 if (seed[index][iLayer].fLabels[1]>=0) {
2887 labels[nlab] = seed[index][iLayer].fLabels[1];
2892 Freq(nlab,labels,outlab,kFALSE);
2893 Int_t label = outlab[0];
2894 Int_t frequency = outlab[1];
2895 Freq(nlabelsall,labelsall,outlab,kFALSE);
2896 Int_t label1 = outlab[0];
2897 Int_t label2 = outlab[2];
2898 Float_t fakeratio = (naccepted-outlab[1])/Float_t(naccepted);
2899 Float_t ratio = Float_t(nused)/Float_t(ncl);
2901 for (Int_t jLayer=0;jLayer<6;jLayer++){
2902 if ( seed[index][jLayer].isOK()&&TMath::Abs(seed[index][jLayer].fYfit[1]-seed[index][jLayer].fYfit[1])<0.2 )
2903 seed[index][jLayer].UseClusters(); //sign gold
2907 Int_t eventNr = esd->GetEventNumber();
2908 TTreeSRedirector& cstream = *fDebugStreamer;
2912 AliTRDtrack * track = RegisterSeed(seed[index],seedparams[index]);
2914 if (!track) track=&dummy;
2916 AliESDtrack esdtrack;
2917 esdtrack.UpdateTrackParams(track, AliESDtrack::kTRDout);
2918 esdtrack.SetLabel(label);
2919 esd->AddTrack(&esdtrack);
2920 TTreeSRedirector& cstream = *fDebugStreamer;
2922 "EventNr="<<eventNr<<
2923 "ESD.="<<&esdtrack<<
2925 "trdback.="<<track<<
2932 "Like="<<seedquality[index]<<
2933 "LikeF="<<seedquality2[index]<<
2934 "S0.="<<&seed[index][0]<<
2935 "S1.="<<&seed[index][1]<<
2936 "S2.="<<&seed[index][2]<<
2937 "S3.="<<&seed[index][3]<<
2938 "S4.="<<&seed[index][4]<<
2939 "S5.="<<&seed[index][5]<<
2943 "FakeRatio="<<fakeratio<<
2944 "Freq="<<frequency<<
2946 "Nlayers="<<nlayers<<
2947 "Findable="<<findable<<
2950 "EventNr="<<eventNr<<
2954 } // end of loop over sectors
2958 //_____________________________________________________________________________
2959 Int_t AliTRDtracker::ReadClusters(TObjArray *array, TTree *ClusterTree) const
2962 // Reads AliTRDclusters (option >= 0) or AliTRDrecPoints (option < 0)
2963 // from the file. The names of the cluster tree and branches
2964 // should match the ones used in AliTRDclusterizer::WriteClusters()
2966 Int_t nsize = Int_t(ClusterTree->GetTotBytes()/(sizeof(AliTRDcluster)));
2967 TObjArray *clusterArray = new TObjArray(nsize+1000);
2969 TBranch *branch=ClusterTree->GetBranch("TRDcluster");
2971 Error("ReadClusters","Can't get the branch !");
2974 branch->SetAddress(&clusterArray);
2976 Int_t nEntries = (Int_t) ClusterTree->GetEntries();
2977 // printf("found %d entries in %s.\n",nEntries,ClusterTree->GetName());
2979 // Loop through all entries in the tree
2981 AliTRDcluster *c = 0;
2983 for (Int_t iEntry = 0; iEntry < nEntries; iEntry++) {
2986 nbytes += ClusterTree->GetEvent(iEntry);
2988 // Get the number of points in the detector
2989 Int_t nCluster = clusterArray->GetEntriesFast();
2990 // printf("\r Read %d clusters from entry %d", nCluster, iEntry);
2992 // Loop through all TRD digits
2993 for (Int_t iCluster = 0; iCluster < nCluster; iCluster++) {
2994 c = (AliTRDcluster*)clusterArray->UncheckedAt(iCluster);
2995 // if (c->GetNPads()>3&&(iCluster%3>0)) {
2996 // delete clusterArray->RemoveAt(iCluster);
2999 // AliTRDcluster *co = new AliTRDcluster(*c); //remove unnecesary coping - + clusters are together in memory
3000 AliTRDcluster *co = c;
3001 co->SetSigmaY2(c->GetSigmaY2() * fSY2corr);
3002 Int_t ltb = co->GetLocalTimeBin();
3003 if(ltb == 19) co->SetSigmaZ2(c->GetSigmaZ2());
3004 else if(fNoTilt) co->SetSigmaZ2(c->GetSigmaZ2() * fSZ2corr);
3006 // delete clusterArray->RemoveAt(iCluster);
3007 clusterArray->RemoveAt(iCluster);
3010 // cout<<"Allocated"<<nsize<<"\tLoaded"<<array->GetEntriesFast()<<"\n";
3012 delete clusterArray;
3017 //__________________________________________________________________
3018 Bool_t AliTRDtracker::GetTrackPoint(Int_t index, AliTrackPoint& p) const
3021 // Get track space point with index i
3022 // Origin: C.Cheshkov
3025 AliTRDcluster *cl = (AliTRDcluster*)fClusters->UncheckedAt(index);
3026 Int_t idet = cl->GetDetector();
3027 Int_t isector = fGeom->GetSector(idet);
3028 Int_t ichamber= fGeom->GetChamber(idet);
3029 Int_t iplan = fGeom->GetPlane(idet);
3031 local[0]=GetX(isector,iplan,cl->GetLocalTimeBin());
3032 local[1]=cl->GetY();
3033 local[2]=cl->GetZ();
3035 fGeom->RotateBack(idet,local,global);
3036 p.SetXYZ(global[0],global[1],global[2]);
3037 AliAlignObj::ELayerID iLayer = AliAlignObj::kTRD1;
3040 iLayer = AliAlignObj::kTRD1;
3043 iLayer = AliAlignObj::kTRD2;
3046 iLayer = AliAlignObj::kTRD3;
3049 iLayer = AliAlignObj::kTRD4;
3052 iLayer = AliAlignObj::kTRD5;
3055 iLayer = AliAlignObj::kTRD6;
3058 Int_t modId = isector*fGeom->Ncham()+ichamber;
3059 UShort_t volid = AliAlignObj::LayerToVolUID(iLayer,modId);
3060 p.SetVolumeID(volid);
3066 //__________________________________________________________________
3067 void AliTRDtracker::CookLabel(AliKalmanTrack* pt, Float_t wrong) const
3070 // This cooks a label. Mmmmh, smells good...
3073 Int_t label=123456789, index, i, j;
3074 Int_t ncl=pt->GetNumberOfClusters();
3075 const Int_t kRange = fTrSec[0]->GetOuterTimeBin()+1;
3079 // Int_t s[kRange][2];
3080 Int_t **s = new Int_t* [kRange];
3081 for (i=0; i<kRange; i++) {
3082 s[i] = new Int_t[2];
3084 for (i=0; i<kRange; i++) {
3090 for (i=0; i<ncl; i++) {
3091 index=pt->GetClusterIndex(i);
3092 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
3098 for (i=0; i<ncl; i++) {
3099 index=pt->GetClusterIndex(i);
3100 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
3101 for (Int_t k=0; k<3; k++) {
3102 label=c->GetLabel(k);
3103 labelAdded=kFALSE; j=0;
3105 while ( (!labelAdded) && ( j < kRange ) ) {
3106 if (s[j][0]==label || s[j][1]==0) {
3120 for (i=0; i<kRange; i++) {
3122 max=s[i][1]; label=s[i][0];
3126 for (i=0; i<kRange; i++) {
3132 if ((1.- Float_t(max)/ncl) > wrong) label=-label;
3134 pt->SetLabel(label);
3139 //__________________________________________________________________
3140 void AliTRDtracker::UseClusters(const AliKalmanTrack* t, Int_t from) const
3143 // Use clusters, but don't abuse them!
3145 const Float_t kmaxchi2 =18;
3146 const Float_t kmincl =10;
3147 AliTRDtrack * track = (AliTRDtrack*)t;
3149 Int_t ncl=t->GetNumberOfClusters();
3150 for (Int_t i=from; i<ncl; i++) {
3151 Int_t index = t->GetClusterIndex(i);
3152 AliTRDcluster *c=(AliTRDcluster*)fClusters->UncheckedAt(index);
3154 Int_t iplane = fGeom->GetPlane(c->GetDetector());
3155 if (track->fTracklets[iplane].GetChi2()>kmaxchi2) continue;
3156 if (track->fTracklets[iplane].GetN()<kmincl) continue;
3157 if (!(c->IsUsed())) c->Use();
3162 //_____________________________________________________________________
3163 Double_t AliTRDtracker::ExpectedSigmaY2(Double_t , Double_t , Double_t ) const
3165 // Parametrised "expected" error of the cluster reconstruction in Y
3167 Double_t s = 0.08 * 0.08;
3171 //_____________________________________________________________________
3172 Double_t AliTRDtracker::ExpectedSigmaZ2(Double_t , Double_t ) const
3174 // Parametrised "expected" error of the cluster reconstruction in Z
3176 Double_t s = 9 * 9 /12.;
3180 //_____________________________________________________________________
3181 Double_t AliTRDtracker::GetX(Int_t sector, Int_t plane, Int_t localTB) const
3184 // Returns radial position which corresponds to time bin <localTB>
3185 // in tracking sector <sector> and plane <plane>
3188 Int_t index = fTrSec[sector]->CookTimeBinIndex(plane, localTB);
3189 Int_t pl = fTrSec[sector]->GetLayerNumber(index);
3190 return fTrSec[sector]->GetLayer(pl)->GetX();
3195 //_______________________________________________________
3196 AliTRDtracker::AliTRDpropagationLayer::AliTRDpropagationLayer(Double_t x,
3197 Double_t dx, Double_t rho, Double_t radLength, Int_t tbIndex)
3200 // AliTRDpropagationLayer constructor
3203 fN = 0; fX = x; fdX = dx; fRho = rho; fX0 = radLength;
3204 fClusters = NULL; fIndex = NULL; fTimeBinIndex = tbIndex;
3207 for(Int_t i=0; i < (Int_t) kZones; i++) {
3208 fZc[i]=0; fZmax[i] = 0;
3213 if(fTimeBinIndex >= 0) {
3214 fClusters = new AliTRDcluster*[kMaxClusterPerTimeBin];
3215 fIndex = new UInt_t[kMaxClusterPerTimeBin];
3218 for (Int_t i=0;i<5;i++) fIsHole[i] = kFALSE;
3229 //_______________________________________________________
3230 void AliTRDtracker::AliTRDpropagationLayer::SetHole(
3231 Double_t Zmax, Double_t Ymax, Double_t rho,
3232 Double_t radLength, Double_t Yc, Double_t Zc)
3235 // Sets hole in the layer
3243 fHoleX0 = radLength;
3247 //_______________________________________________________
3248 AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector(AliTRDgeometry* geo, Int_t gs, AliTRDparameter* par)
3251 // AliTRDtrackingSector Constructor
3253 AliTRDpadPlane *padPlane = 0;
3261 // get holes description from geometry
3262 Bool_t holes[AliTRDgeometry::kNcham];
3263 //printf("sector\t%d\t",gs);
3264 for (Int_t icham=0; icham<AliTRDgeometry::kNcham;icham++){
3265 holes[icham] = fGeom->IsHole(0,icham,gs);
3266 //printf("%d",holes[icham]);
3270 for(UInt_t i=0; i < kMaxTimeBinIndex; i++) fTimeBinIndex[i] = -1;
3273 AliTRDpropagationLayer* ppl;
3275 Double_t x, xin, xout, dx, rho, radLength;
3278 // set time bins in the gas of the TPC
3280 xin = 246.055; xout = 254.055; steps = 20; dx = (xout-xin)/steps;
3281 rho = 0.9e-3; radLength = 28.94;
3283 for(Int_t i=0; i<steps; i++) {
3284 x = xin + i*dx + dx/2;
3285 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3289 // set time bins in the outer field cage vessel
3291 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
3292 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3295 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
3296 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3299 dx = 2.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
3300 steps = 5; dx = (xout - xin)/steps;
3301 for(Int_t i=0; i<steps; i++) {
3302 x = xin + i*dx + dx/2;
3303 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3307 dx = 0.02; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
3308 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3311 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
3312 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3316 // set time bins in CO2
3318 xin = xout; xout = 275.0;
3319 steps = 50; dx = (xout - xin)/steps;
3320 rho = 1.977e-3; radLength = 36.2;
3322 for(Int_t i=0; i<steps; i++) {
3323 x = xin + i*dx + dx/2;
3324 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3328 // set time bins in the outer containment vessel
3330 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
3331 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3334 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
3335 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3338 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
3339 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3342 dx = 3.; xin = xout; xout = xin + dx; rho = 1.45*0.02; radLength = 41.28; // Nomex
3343 steps = 10; dx = (xout - xin)/steps;
3344 for(Int_t i=0; i<steps; i++) {
3345 x = xin + i*dx + dx/2;
3346 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3350 dx = 0.06; xin = xout; xout = xin + dx; rho = 1.45; radLength = 44.86; // prepreg
3351 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3354 dx = 50e-4; xin = xout; xout = xin + dx; rho = 1.71; radLength = 44.77; // Tedlar
3355 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3358 dx = 50e-4; xin = xout; xout = xin + dx; rho = 2.7; radLength = 24.01; // Al
3359 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3362 Double_t xtrd = (Double_t) fGeom->Rmin();
3364 // add layers between TPC and TRD (Air temporarily)
3365 xin = xout; xout = xtrd;
3366 steps = 50; dx = (xout - xin)/steps;
3367 rho = 1.2e-3; radLength = 36.66;
3369 for(Int_t i=0; i<steps; i++) {
3370 x = xin + i*dx + dx/2;
3371 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3376 // Double_t alpha=AliTRDgeometry::GetAlpha();
3378 // add layers for each of the planes
3380 Double_t dxRo = (Double_t) fGeom->CroHght(); // Rohacell
3381 Double_t dxSpace = (Double_t) fGeom->Cspace(); // Spacing between planes
3382 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
3383 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
3384 Double_t dxRad = (Double_t) fGeom->CraHght(); // Radiator
3385 Double_t dxTEC = dxRad + dxDrift + dxAmp + dxRo;
3386 Double_t dxPlane = dxTEC + dxSpace;
3389 const Int_t kNchambers = AliTRDgeometry::Ncham();
3392 Double_t ymaxsensitive=0;
3393 Double_t *zc = new Double_t[kNchambers];
3394 Double_t *zmax = new Double_t[kNchambers];
3395 Double_t *zmaxsensitive = new Double_t[kNchambers];
3396 // Double_t holeZmax = 1000.; // the whole sector is missing
3398 AliTRDCommonParam* commonParam = AliTRDCommonParam::Instance();
3401 printf("<AliTRDtracker::AliTRDtrackingSector::AliTRDtrackingSector> ");
3402 printf("Could not get common params\n");
3406 for(Int_t plane = 0; plane < AliTRDgeometry::Nplan(); plane++) {
3409 xin = xtrd + plane * dxPlane; xout = xin + dxRad;
3410 steps = 12; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
3411 for(Int_t i=0; i<steps; i++) {
3412 x = xin + i*dx + dx/2;
3413 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3417 ymax = fGeom->GetChamberWidth(plane)/2.;
3418 // Modidified for new pad plane class, 22.04.05 (C.B.)
3419 // ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
3420 padPlane = commonParam->GetPadPlane(plane,0);
3421 ymaxsensitive = (padPlane->GetColSize(1)*padPlane->GetNcols()-4)/2.;
3423 // ymaxsensitive = (fPar->GetColPadSize(plane)*fPar->GetColMax(plane)-4)/2.;
3425 for(Int_t ch = 0; ch < kNchambers; ch++) {
3426 zmax[ch] = fGeom->GetChamberLength(plane,ch)/2;
3428 // Modidified for new pad plane class, 22.04.05 (C.B.)
3429 //Float_t pad = fPar->GetRowPadSize(plane,ch,0);
3430 Float_t pad = padPlane->GetRowSize(1);
3431 //Float_t pad = fPar->GetRowPadSize(plane,ch,0);
3432 Float_t row0 = commonParam->GetRow0(plane,ch,0);
3433 Int_t nPads = commonParam->GetRowMax(plane,ch,0);
3434 zmaxsensitive[ch] = Float_t(nPads)*pad/2.;
3435 // zc[ch] = (pad * nPads)/2 + row0 - pad/2;
3436 // zc[ch] = (pad * nPads)/2 + row0;
3437 zc[ch] = -(pad * nPads)/2 + row0;
3438 //zc[ch] = row0+zmax[ch]-AliTRDgeometry::RpadW();
3442 dx = fgkDriftCorrection*fPar->GetDriftVelocity()
3443 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
3444 rho = 0.00295 * 0.85; radLength = 11.0;
3446 Double_t x0 = (Double_t) AliTRDgeometry::GetTime0(plane);
3447 Double_t xbottom = x0 - dxDrift;
3448 Double_t xtop = x0 + dxAmp;
3450 // Amplification region
3451 steps = (Int_t) (dxAmp/dx);
3453 for(tb = 0; tb < steps; tb++) {
3454 x = x0 + tb * dx + dx/2+ fgkOffsetX;
3455 tbIndex = CookTimeBinIndex(plane, -tb-1);
3456 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3457 ppl->SetYmax(ymax,ymaxsensitive);
3458 ppl->SetZ(zc, zmax, zmaxsensitive);
3459 ppl->SetHoles(holes);
3462 tbIndex = CookTimeBinIndex(plane, -steps);
3463 x = (x + dx/2 + xtop)/2;
3465 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3466 ppl->SetYmax(ymax,ymaxsensitive);
3467 ppl->SetZ(zc, zmax,zmaxsensitive);
3468 ppl->SetHoles(holes);
3473 dx = fgkDriftCorrection*fPar->GetDriftVelocity()
3474 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
3475 steps = (Int_t) (dxDrift/dx)+3;
3477 for(tb = 0; tb < steps; tb++) {
3478 x = x0 - tb * dx - dx/2 + fgkOffsetX; //temporary fix - fix it the parameters
3479 tbIndex = CookTimeBinIndex(plane, tb);
3481 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3482 ppl->SetYmax(ymax,ymaxsensitive);
3483 ppl->SetZ(zc, zmax, zmaxsensitive);
3484 ppl->SetHoles(holes);
3487 tbIndex = CookTimeBinIndex(plane, steps);
3488 x = (x - dx/2 + xbottom)/2;
3490 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,tbIndex);
3491 ppl->SetYmax(ymax,ymaxsensitive);
3492 ppl->SetZ(zc, zmax, zmaxsensitive);
3493 ppl->SetHoles(holes);
3497 xin = xtop; dx = 0.025; xout = xin + dx; rho = 1.7; radLength = 33.0;
3498 ppl = new AliTRDpropagationLayer(xin+dx/2,dx,rho,radLength,-1);
3499 ppl->SetYmax(ymax,ymaxsensitive);
3500 ppl->SetZ(zc, zmax,zmax);
3501 ppl->SetHoles(holes);
3505 xin = xout; xout = xtrd + (plane + 1) * dxPlane - dxSpace;
3506 steps = 5; dx = (xout - xin)/steps; rho = 0.074; radLength = 40.6;
3507 for(Int_t i=0; i<steps; i++) {
3508 x = xin + i*dx + dx/2;
3509 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3510 ppl->SetYmax(ymax,ymaxsensitive);
3511 ppl->SetZ(zc, zmax,zmax);
3512 ppl->SetHoles(holes);
3516 // Space between the chambers, air
3517 xin = xout; xout = xtrd + (plane + 1) * dxPlane;
3518 steps = 5; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
3519 for(Int_t i=0; i<steps; i++) {
3520 x = xin + i*dx + dx/2;
3521 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3526 // Space between the TRD and RICH
3527 Double_t xRICH = 500.;
3528 xin = xout; xout = xRICH;
3529 steps = 200; dx = (xout - xin)/steps; rho = 1.29e-3; radLength = 36.66;
3530 for(Int_t i=0; i<steps; i++) {
3531 x = xin + i*dx + dx/2;
3532 ppl = new AliTRDpropagationLayer(x,dx,rho,radLength,-1);
3539 delete [] zmaxsensitive;
3543 //______________________________________________________
3545 Int_t AliTRDtracker::AliTRDtrackingSector::CookTimeBinIndex(Int_t plane, Int_t localTB) const
3548 // depending on the digitization parameters calculates "global"
3549 // time bin index for timebin <localTB> in plane <plane>
3552 Double_t dxAmp = (Double_t) fGeom->CamHght(); // Amplification region
3553 Double_t dxDrift = (Double_t) fGeom->CdrHght(); // Drift region
3555 Double_t dx = fgkDriftCorrection*(Double_t) fPar->GetDriftVelocity()
3556 / AliTRDcalibDB::Instance()->GetSamplingFrequency();
3558 Int_t tbAmp = fPar->GetTimeBefore();
3559 Int_t maxAmp = (Int_t) ((dxAmp+0.000001)/dx);
3560 if(kTRUE) maxAmp = 0; // intentional until we change parameter class
3561 Int_t tbDrift = fPar->GetTimeMax();
3562 Int_t maxDrift = (Int_t) ((dxDrift+0.000001)/dx)+4; // MI change - take also last time bins
3564 Int_t tbPerPlane = TMath::Min(tbAmp,maxAmp) + TMath::Min(tbDrift,maxDrift);
3566 Int_t gtb = (plane+1) * tbPerPlane - localTB - 1 - TMath::Min(tbAmp,maxAmp);
3569 (TMath::Abs(localTB) > TMath::Min(tbAmp,maxAmp))) return -1;
3570 if(localTB >= TMath::Min(tbDrift,maxDrift)) return -1;
3577 //______________________________________________________
3579 void AliTRDtracker::AliTRDtrackingSector::MapTimeBinLayers()
3582 // For all sensitive time bins sets corresponding layer index
3583 // in the array fTimeBins
3588 for(Int_t i = 0; i < fN; i++) {
3589 index = fLayers[i]->GetTimeBinIndex();
3591 // printf("gtb %d -> pl %d -> x %f \n", index, i, fLayers[i]->GetX());
3593 if(index < 0) continue;
3594 if(index >= (Int_t) kMaxTimeBinIndex) {
3595 printf("*** AliTRDtracker::MapTimeBinLayers: \n");
3596 printf(" index %d exceeds allowed maximum of %d!\n",
3597 index, kMaxTimeBinIndex-1);
3600 fTimeBinIndex[index] = i;
3603 Double_t x1, dx1, x2, dx2, gap;
3605 for(Int_t i = 0; i < fN-1; i++) {
3606 x1 = fLayers[i]->GetX();
3607 dx1 = fLayers[i]->GetdX();
3608 x2 = fLayers[i+1]->GetX();
3609 dx2 = fLayers[i+1]->GetdX();
3610 gap = (x2 - dx2/2) - (x1 + dx1/2);
3611 // if(gap < -0.01) {
3612 // printf("*** warning: layers %d and %d are overlayed:\n",i,i+1);
3613 // printf(" %f + %f + %f > %f\n", x1, dx1/2, dx2/2, x2);
3616 // printf("*** warning: layers %d and %d have a large gap:\n",i,i+1);
3617 // printf(" (%f - %f) - (%f + %f) = %f\n",
3618 // x2, dx2/2, x1, dx1, gap);
3624 //______________________________________________________
3627 Int_t AliTRDtracker::AliTRDtrackingSector::GetLayerNumber(Double_t x) const
3630 // Returns the number of time bin which in radial position is closest to <x>
3633 if(x >= fLayers[fN-1]->GetX()) return fN-1;
3634 if(x <= fLayers[0]->GetX()) return 0;
3636 Int_t b=0, e=fN-1, m=(b+e)/2;
3637 for (; b<e; m=(b+e)/2) {
3638 if (x > fLayers[m]->GetX()) b=m+1;
3641 if(TMath::Abs(x - fLayers[m]->GetX()) >
3642 TMath::Abs(x - fLayers[m+1]->GetX())) return m+1;
3647 //______________________________________________________
3649 Int_t AliTRDtracker::AliTRDtrackingSector::GetInnerTimeBin() const
3652 // Returns number of the innermost SENSITIVE propagation layer
3655 return GetLayerNumber(0);
3658 //______________________________________________________
3660 Int_t AliTRDtracker::AliTRDtrackingSector::GetOuterTimeBin() const
3663 // Returns number of the outermost SENSITIVE time bin
3666 return GetLayerNumber(GetNumberOfTimeBins() - 1);
3669 //______________________________________________________
3671 Int_t AliTRDtracker::AliTRDtrackingSector::GetNumberOfTimeBins() const
3674 // Returns number of SENSITIVE time bins
3678 for(tb = kMaxTimeBinIndex-1; tb >=0; tb--) {
3679 layer = GetLayerNumber(tb);
3685 //______________________________________________________
3687 void AliTRDtracker::AliTRDtrackingSector::InsertLayer(AliTRDpropagationLayer* pl)
3690 // Insert layer <pl> in fLayers array.
3691 // Layers are sorted according to X coordinate.
3693 if ( fN == ((Int_t) kMaxLayersPerSector)) {
3694 printf("AliTRDtrackingSector::InsertLayer(): Too many layers !\n");
3697 if (fN==0) {fLayers[fN++] = pl; return;}
3698 Int_t i=Find(pl->GetX());
3700 memmove(fLayers+i+1 ,fLayers+i,(fN-i)*sizeof(AliTRDpropagationLayer*));
3701 fLayers[i]=pl; fN++;
3705 //______________________________________________________
3707 Int_t AliTRDtracker::AliTRDtrackingSector::Find(Double_t x) const
3710 // Returns index of the propagation layer nearest to X
3713 if (x <= fLayers[0]->GetX()) return 0;
3714 if (x > fLayers[fN-1]->GetX()) return fN;
3715 Int_t b=0, e=fN-1, m=(b+e)/2;
3716 for (; b<e; m=(b+e)/2) {
3717 if (x > fLayers[m]->GetX()) b=m+1;
3727 //______________________________________________________
3728 void AliTRDtracker::AliTRDpropagationLayer::SetZ(Double_t* center, Double_t *w, Double_t *wsensitive )
3731 // set centers and the width of sectors
3732 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
3733 fZc[icham] = center[icham];
3734 fZmax[icham] = w[icham];
3735 fZmaxSensitive[icham] = wsensitive[icham];
3736 // printf("chamber\t%d\tzc\t%f\tzmax\t%f\tzsens\t%f\n",icham,fZc[icham],fZmax[icham],fZmaxSensitive[icham]);
3739 //______________________________________________________
3741 void AliTRDtracker::AliTRDpropagationLayer::SetHoles(Bool_t *holes)
3744 // set centers and the width of sectors
3746 for (Int_t icham=0;icham< AliTRDgeometry::kNcham;icham++){
3747 fIsHole[icham] = holes[icham];
3748 if (holes[icham]) fHole = kTRUE;
3754 Bool_t AliTRDtracker::AliTRDpropagationLayer::GetPropagationParameters(
3755 Double_t y, Double_t z, Double_t &dx, Double_t &rho, Double_t &radLength,
3756 Bool_t &lookForCluster) const
3759 // Returns radial step <dx>, density <rho>, rad. length <radLength>,
3760 // and sensitivity <lookForCluster> in point <y,z>
3763 Double_t alpha = AliTRDgeometry::GetAlpha();
3764 Double_t ymax = fX*TMath::Tan(0.5*alpha);
3770 lookForCluster = kFALSE;
3771 Bool_t cross =kFALSE;
3774 if ( (ymax-TMath::Abs(y))<3.){ //cross material
3780 // check dead regions in sensitive volume
3783 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3784 if (TMath::Abs(z - fZc[ch]) > fZmax[ch]) continue; //not in given zone
3786 if (TMath::Abs(z - fZc[ch]) < fZmaxSensitive[ch]){
3787 if (fTimeBinIndex>=0) lookForCluster = !(fIsHole[zone]);
3788 if(TMath::Abs(y) > fYmaxSensitive){
3789 lookForCluster = kFALSE;
3791 if (fIsHole[zone]) {
3797 cross = kTRUE; rho = 2.7; radLength = 24.01; //aluminium in between
3801 if (fTimeBinIndex>=0) return cross;
3805 if (fHole==kFALSE) return cross;
3807 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3808 if (TMath::Abs(z - fZc[ch]) < fZmax[ch]){
3819 Int_t AliTRDtracker::AliTRDpropagationLayer::GetZone( Double_t z) const
3823 if (fTimeBinIndex < 0) return -20; //unknown
3824 Int_t zone=-10; // dead zone
3825 for(Int_t ch = 0; ch < (Int_t) kZones; ch++) {
3826 if(TMath::Abs(z - fZc[ch]) < fZmax[ch])
3833 //______________________________________________________
3835 void AliTRDtracker::AliTRDpropagationLayer::InsertCluster(AliTRDcluster* c,
3838 // Insert cluster in cluster array.
3839 // Clusters are sorted according to Y coordinate.
3841 if(fTimeBinIndex < 0) {
3842 printf("*** attempt to insert cluster into non-sensitive time bin!\n");
3846 if (fN== (Int_t) kMaxClusterPerTimeBin) {
3847 printf("AliTRDpropagationLayer::InsertCluster(): Too many clusters !\n");
3850 if (fN==0) {fIndex[0]=index; fClusters[fN++]=c; return;}
3851 Int_t i=Find(c->GetY());
3852 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTRDcluster*));
3853 memmove(fIndex +i+1 ,fIndex +i,(fN-i)*sizeof(UInt_t));
3854 fIndex[i]=index; fClusters[i]=c; fN++;
3857 //______________________________________________________
3859 Int_t AliTRDtracker::AliTRDpropagationLayer::Find(Float_t y) const {
3861 // Returns index of the cluster nearest in Y
3863 if (fN<=0) return 0;
3864 if (y <= fClusters[0]->GetY()) return 0;
3865 if (y > fClusters[fN-1]->GetY()) return fN;
3866 Int_t b=0, e=fN-1, m=(b+e)/2;
3867 for (; b<e; m=(b+e)/2) {
3868 if (y > fClusters[m]->GetY()) b=m+1;
3874 Int_t AliTRDtracker::AliTRDpropagationLayer::FindNearestCluster(Float_t y, Float_t z, Float_t maxroad, Float_t maxroadz) const
3877 // Returns index of the cluster nearest to the given y,z
3881 Float_t mindist = maxroad;
3883 for (Int_t i=Find(y-maxroad); i<maxn; i++) {
3884 AliTRDcluster* c=(AliTRDcluster*)(fClusters[i]);
3885 Float_t ycl = c->GetY();
3887 if (ycl > y+maxroad) break;
3888 if (TMath::Abs(c->GetZ()-z) > maxroadz) continue;
3889 if (TMath::Abs(ycl-y)<mindist){
3890 mindist = TMath::Abs(ycl-y);
3898 //---------------------------------------------------------
3900 Double_t AliTRDtracker::GetTiltFactor(const AliTRDcluster* c) {
3902 // Returns correction factor for tilted pads geometry
3904 Int_t det = c->GetDetector();
3905 Int_t plane = fGeom->GetPlane(det);
3906 AliTRDpadPlane *padPlane = AliTRDCommonParam::Instance()->GetPadPlane(plane,0);
3907 Double_t h01 = TMath::Tan(-TMath::Pi() / 180.0 * padPlane->GetTiltingAngle());
3909 if(fNoTilt) h01 = 0;
3914 void AliTRDtracker::CookdEdxTimBin(AliTRDtrack& TRDtrack)
3916 // *** ADDED TO GET MORE INFORMATION FOR TRD PID ---- PS
3917 // This is setting fdEdxPlane and fTimBinPlane
3918 // Sums up the charge in each plane for track TRDtrack and also get the
3919 // Time bin for Max. Cluster
3920 // Prashant Shukla (shukla@physi.uni-heidelberg.de)
3922 // const Int_t kNPlane = AliTRDgeometry::Nplan();
3923 // const Int_t kNPlane = 6;
3924 Double_t clscharge[kNPlane], maxclscharge[kNPlane];
3925 Int_t nCluster[kNPlane], timebin[kNPlane];
3927 //Initialization of cluster charge per plane.
3928 for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3929 clscharge[iPlane] = 0.0;
3930 nCluster[iPlane] = 0;
3931 timebin[iPlane] = -1;
3932 maxclscharge[iPlane] = 0.0;
3935 // Loop through all clusters associated to track TRDtrack
3936 Int_t nClus = TRDtrack.GetNumberOfClusters(); // from Kalmantrack
3937 for (Int_t iClus = 0; iClus < nClus; iClus++) {
3938 Double_t charge = TRDtrack.GetClusterdQdl(iClus);
3939 Int_t index = TRDtrack.GetClusterIndex(iClus);
3940 AliTRDcluster *TRDcluster = (AliTRDcluster *) GetCluster(index);
3941 if (!TRDcluster) continue;
3942 Int_t tb = TRDcluster->GetLocalTimeBin();
3944 Int_t detector = TRDcluster->GetDetector();
3945 Int_t iPlane = fGeom->GetPlane(detector);
3946 clscharge[iPlane] = clscharge[iPlane]+charge;
3947 if(charge > maxclscharge[iPlane]) {
3948 maxclscharge[iPlane] = charge;
3949 timebin[iPlane] = tb;
3952 } // end of loop over cluster
3954 // Setting the fdEdxPlane and fTimBinPlane variabales
3955 Double_t Total_ch = 0;
3956 for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3957 // Quality control of TRD track.
3958 if (nCluster[iPlane]<= 5) {
3959 clscharge[iPlane]=0.0;
3962 if (nCluster[iPlane]) clscharge[iPlane] /= nCluster[iPlane];
3963 TRDtrack.SetPIDsignals(clscharge[iPlane], iPlane);
3964 TRDtrack.SetPIDTimBin(timebin[iPlane], iPlane);
3965 Total_ch= Total_ch+clscharge[iPlane];
3968 // Int_t nc=TRDtrack.GetNumberOfClusters();
3970 // for (i=0; i<nc; i++) dedx += TRDtrack.GetClusterdQdl(i);
3972 // for (Int_t iPlane = 0; iPlane < kNPlane; iPlane++) {
3973 // TRDtrack.SetPIDsignals(dedx, iPlane);
3974 // TRDtrack.SetPIDTimBin(timbin[iPlane], iPlane);
3977 } // end of function
3980 Int_t AliTRDtracker::FindClusters(Int_t sector, Int_t t0, Int_t t1, AliTRDtrack * track, Int_t *clusters,AliTRDtracklet&tracklet)
3984 // try to find nearest clusters to the track in timebins from t0 to t1
3988 // correction coeficients - depends on TRD parameters - to be changed according it
3991 Double_t x[100],yt[100],zt[100];
3992 Double_t xmean=0; //reference x
3993 Double_t dz[10][100],dy[10][100];
3994 Float_t zmean[100], nmean[100];
3996 Int_t indexes[10][100]; // indexes of the clusters in the road
3997 AliTRDcluster *cl[10][100]; // pointers to the clusters in the road
3998 Int_t best[10][100]; // index of best matching cluster
4002 for (Int_t it=0;it<=t1-t0; it++){
4010 for (Int_t ih=0;ih<10;ih++){
4011 indexes[ih][it]=-2; //reset indexes1
4019 Double_t x0 = track->GetX();
4020 Double_t sigmaz = TMath::Sqrt(TMath::Abs(track->GetSigmaZ2()));
4025 Float_t padlength=0;
4026 AliTRDtrack track2(*track);
4027 Float_t snpy = track->GetSnp();
4028 Float_t tany = TMath::Sqrt(snpy*snpy/(1.-snpy*snpy));
4029 if (snpy<0) tany*=-1;
4031 Double_t sy2=ExpectedSigmaY2(x0,track->GetTgl(),track->GetPt());
4032 Double_t sz2=ExpectedSigmaZ2(x0,track->GetTgl());
4033 Double_t road = 15.*sqrt(track->GetSigmaY2() + sy2);
4034 if (road>6.) road=6.;
4037 for (Int_t it=0;it<t1-t0;it++){
4038 Double_t maxChi2[2]={fgkMaxChi2,fgkMaxChi2};
4039 AliTRDpropagationLayer& timeBin=*(fTrSec[sector]->GetLayer(it+t0));
4040 if (timeBin==0) continue; // no indexes1
4041 Int_t maxn = timeBin;
4042 x[it] = timeBin.GetX();
4043 track2.PropagateTo(x[it]);
4044 yt[it] = track2.GetY();
4045 zt[it] = track2.GetZ();
4047 Double_t y=yt[it],z=zt[it];
4048 Double_t chi2 =1000000;
4051 // find 2 nearest cluster at given time bin
4054 for (Int_t i=timeBin.Find(y-road); i<maxn; i++) {
4055 AliTRDcluster* c=(AliTRDcluster*)(timeBin[i]);
4056 h01 = GetTiltFactor(c);
4058 Int_t det = c->GetDetector();
4059 plane = fGeom->GetPlane(det);
4060 padlength = TMath::Sqrt(c->GetSigmaZ2()*12.);
4062 // if (c->GetLocalTimeBin()==0) continue;
4063 if (c->GetY() > y+road) break;
4064 if((c->GetZ()-z)*(c->GetZ()-z) > 12. * sz2) continue;
4066 Double_t dist = TMath::Abs(c->GetZ()-z);
4067 if (dist> (0.5*padlength+6.*sigmaz)) continue; // 6 sigma boundary cut
4070 if (dist> (0.5*padlength-sigmaz)){ // sigma boundary cost function
4071 cost = (dist-0.5*padlength)/(2.*sigmaz);
4072 if (cost>-1) cost= (cost+1.)*(cost+1.);
4075 // Int_t label = TMath::Abs(track->GetLabel());
4076 // if (c->GetLabel(0)!=label && c->GetLabel(1)!=label&&c->GetLabel(2)!=label) continue;
4077 chi2=track2.GetPredictedChi2(c,h01)+cost;
4080 if (chi2 > maxChi2[1]) continue;
4082 for (Int_t ih=2;ih<9; ih++){ //store the clusters in the road
4085 indexes[ih][it] =timeBin.GetIndex(i); // index - 9 - reserved for outliers
4090 if (chi2 <maxChi2[0]){
4091 maxChi2[1] = maxChi2[0];
4093 indexes[1][it] = indexes[0][it];
4094 cl[1][it] = cl[0][it];
4095 indexes[0][it] = timeBin.GetIndex(i);
4101 indexes[1][it] =timeBin.GetIndex(i);
4109 if (nfound<4) return 0;
4110 xmean /=Float_t(nfound); // middle x
4111 track2.PropagateTo(xmean); // propagate track to the center
4113 // choose one of the variants
4119 Double_t sumdy2 = 0;
4129 Double_t moffset[10]; // mean offset
4130 Double_t mean[10]; // mean value
4131 Double_t angle[10]; // angle
4133 Double_t smoffset[10]; // sigma of mean offset
4134 Double_t smean[10]; // sigma of mean value
4135 Double_t sangle[10]; // sigma of angle
4136 Double_t smeanangle[10]; // correlation
4138 Double_t sigmas[10];
4139 Double_t tchi2s[10]; // chi2s for tracklet
4143 for (Int_t it=0;it<t1-t0;it++){
4144 if (!cl[0][it]) continue;
4145 for (Int_t dt=-3;dt<=3;dt++){
4146 if (it+dt<0) continue;
4147 if (it+dt>t1-t0) continue;
4148 if (!cl[0][it+dt]) continue;
4149 zmean[it]+=cl[0][it+dt]->GetZ();
4152 zmean[it]/=nmean[it];
4155 for (Int_t it=0; it<t1-t0;it++){
4157 for (Int_t ih=0;ih<10;ih++){
4160 if (!cl[ih][it]) continue;
4161 //Float_t poscor = fgkCoef*(cl[ih][it]->GetLocalTimeBin() - fgkMean)+fgkOffset;
4162 Float_t poscor = 0; // applied during loading of clusters
4163 if (cl[ih][it]->IsUsed()) poscor=0; // correction already applied
4164 dz[ih][it] = cl[ih][it]->GetZ()- zt[it]; // calculate distance from track in z
4165 dy[ih][it] = cl[ih][it]->GetY()+ dz[ih][it]*h01 - poscor -yt[it]; // in y
4168 if (!cl[0][it]) continue;
4169 if (TMath::Abs(cl[0][it]->GetZ()-zmean[it])> padlength*0.8 &&cl[1][it])
4170 if (TMath::Abs(cl[1][it]->GetZ()-zmean[it])< padlength*0.5){
4175 // iterative choosing of "best path"
4178 Int_t label = TMath::Abs(track->GetLabel());
4181 for (Int_t iter=0;iter<9;iter++){
4184 sumz = 0; sum=0; sumdy=0;sumdy2=0;sumx=0;sumx2=0;sumxy=0;mpads=0; ngood[iter]=0; nbad[iter]=0;
4186 for (Int_t it=0;it<t1-t0;it++){
4187 if (!cl[best[iter][it]][it]) continue;
4188 //calculates pad-row changes
4189 Double_t zbefore= cl[best[iter][it]][it]->GetZ();
4190 Double_t zafter = cl[best[iter][it]][it]->GetZ();
4191 for (Int_t itd = it-1; itd>=0;itd--) {
4192 if (cl[best[iter][itd]][itd]) {
4193 zbefore= cl[best[iter][itd]][itd]->GetZ();
4197 for (Int_t itd = it+1; itd<t1-t0;itd++) {
4198 if (cl[best[iter][itd]][itd]) {
4199 zafter= cl[best[iter][itd]][itd]->GetZ();
4203 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]++;
4205 Double_t dx = x[it]-xmean; // distance to reference x
4206 sumz += cl[best[iter][it]][it]->GetZ();
4208 sumdy += dy[best[iter][it]][it];
4209 sumdy2+= dy[best[iter][it]][it]*dy[best[iter][it]][it];
4212 sumxy += dx*dy[best[iter][it]][it];
4213 mpads += cl[best[iter][it]][it]->GetNPads();
4214 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){
4222 // calculates line parameters
4224 Double_t det = sum*sumx2-sumx*sumx;
4225 angle[iter] = (sum*sumxy-sumx*sumdy)/det;
4226 mean[iter] = (sumx2*sumdy-sumx*sumxy)/det;
4227 meanz[iter] = sumz/sum;
4228 moffset[iter] = sumdy/sum;
4229 mpads /= sum; // mean number of pads
4232 Double_t sigma2 = 0; // normalized residuals - for line fit
4233 Double_t sigma1 = 0; // normalized residuals - constant fit
4235 for (Int_t it=0;it<t1-t0;it++){
4236 if (!cl[best[iter][it]][it]) continue;
4237 Double_t dx = x[it]-xmean;
4238 Double_t ytr = mean[iter]+angle[iter]*dx;
4239 sigma2 += (dy[best[iter][it]][it]-ytr)*(dy[best[iter][it]][it]-ytr);
4240 sigma1 += (dy[best[iter][it]][it]-moffset[iter])*(dy[best[iter][it]][it]-moffset[iter]);
4243 sigma2 /=(sum-2); // normalized residuals
4244 sigma1 /=(sum-1); // normalized residuals
4246 smean[iter] = sigma2*(sumx2/det); // estimated error2 of mean
4247 sangle[iter] = sigma2*(sum/det); // estimated error2 of angle
4248 smeanangle[iter] = sigma2*(-sumx/det); // correlation
4251 sigmas[iter] = TMath::Sqrt(sigma1); //
4252 smoffset[iter]= (sigma1/sum)+0.01*0.01; // sigma of mean offset + unisochronity sigma
4254 // iterative choosing of "better path"
4256 for (Int_t it=0;it<t1-t0;it++){
4257 if (!cl[best[iter][it]][it]) continue;
4259 Double_t sigmatr2 = smoffset[iter]+0.5*tany*tany; //add unisochronity + angular effect contribution
4260 Double_t sweight = 1./sigmatr2+1./track->GetSigmaY2();
4261 Double_t weighty = (moffset[iter]/sigmatr2)/sweight; // weighted mean
4262 Double_t sigmacl = TMath::Sqrt(sigma1*sigma1+track->GetSigmaY2()); //
4263 Double_t mindist=100000;
4265 for (Int_t ih=0;ih<10;ih++){
4266 if (!cl[ih][it]) break;
4267 Double_t dist2 = (dy[ih][it]-weighty)/sigmacl;
4268 dist2*=dist2; //chi2 distance
4274 best[iter+1][it]=ihbest;
4277 // update best hypothesy if better chi2 according tracklet position and angle
4279 Double_t sy2 = smean[iter] + track->GetSigmaY2();
4280 Double_t sa2 = sangle[iter] + track->fCee;
4281 Double_t say = track->fCey;
4282 // Double_t chi20 = mean[bestiter]*mean[bestiter]/sy2+angle[bestiter]*angle[bestiter]/sa2;
4283 // Double_t chi21 = mean[iter]*mean[iter]/sy2+angle[iter]*angle[iter]/sa2;
4285 Double_t detchi = sy2*sa2-say*say;
4286 Double_t invers[3] = {sa2/detchi, sy2/detchi, -say/detchi}; //inverse value of covariance matrix
4288 Double_t chi20 = mean[bestiter]*mean[bestiter]*invers[0]+angle[bestiter]*angle[bestiter]*invers[1]+
4289 2.*mean[bestiter]*angle[bestiter]*invers[2];
4290 Double_t chi21 = mean[iter]*mean[iter]*invers[0]+angle[iter]*angle[iter]*invers[1]+
4291 2*mean[iter]*angle[iter]*invers[2];
4292 tchi2s[iter] =chi21;
4294 if (changes[iter]<=changes[bestiter] && chi21<chi20) {
4301 Double_t sigma2 = sigmas[0]; // choose as sigma from 0 iteration
4302 Short_t maxpos = -1;
4303 Float_t maxcharge = 0;
4304 Short_t maxpos4 = -1;
4305 Float_t maxcharge4 = 0;
4306 Short_t maxpos5 = -1;
4307 Float_t maxcharge5 = 0;
4309 //if (tchi2s[bestiter]>25.) sigma2*=tchi2s[bestiter]/25.;
4310 //if (tchi2s[bestiter]>25.) sigma2=1000.; // dont'accept
4312 Double_t expectederr = sigma2*sigma2+0.01*0.01;
4313 if (mpads>3.5) expectederr += (mpads-3.5)*0.04;
4314 if (changes[bestiter]>1) expectederr+= changes[bestiter]*0.01;
4315 expectederr+=(0.03*(tany-fgkExB)*(tany-fgkExB))*15;
4316 // if (tchi2s[bestiter]>18.) expectederr*= tchi2s[bestiter]/18.;
4317 //expectederr+=10000;
4318 for (Int_t it=0;it<t1-t0;it++){
4319 if (!cl[best[bestiter][it]][it]) continue;
4320 // Float_t poscor = fgkCoef*(cl[best[bestiter][it]][it]->GetLocalTimeBin() - fgkMean)+fgkOffset;
4321 Float_t poscor = 0; //applied during loading of cluster
4322 cl[best[bestiter][it]][it]->SetSigmaY2(expectederr); // set cluster error
4323 if (!cl[best[bestiter][it]][it]->IsUsed()){
4324 cl[best[bestiter][it]][it]->SetY( cl[best[bestiter][it]][it]->GetY()-poscor); // ExB corrction correction
4325 // cl[best[bestiter][it]][it]->Use();
4328 // time bins with maximal charge
4329 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){
4330 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4331 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4334 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){
4335 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){
4336 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4337 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4340 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){
4341 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){
4342 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4343 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4347 // time bins with maximal charge
4348 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge){
4349 maxcharge = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4350 maxpos = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4353 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge4){
4354 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=4){
4355 maxcharge4 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4356 maxpos4 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4359 if (TMath::Abs(cl[best[bestiter][it]][it]->GetQ())> maxcharge5){
4360 if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>=5){
4361 maxcharge5 = TMath::Abs(cl[best[bestiter][it]][it]->GetQ());
4362 maxpos5 = cl[best[bestiter][it]][it]->GetLocalTimeBin();
4365 clusters[it+t0] = indexes[best[bestiter][it]][it];
4366 //if (cl[best[bestiter][it]][it]->GetLocalTimeBin()>4 && cl[best[bestiter][it]][it]->GetLocalTimeBin()<18) clusters[it+t0] = indexes[best[bestiter][it]][it]; //Test
4369 // set tracklet parameters
4371 Double_t trackleterr2 = smoffset[bestiter]+0.01*0.01;
4372 if (mpads>3.5) trackleterr2 += (mpads-3.5)*0.04;
4373 trackleterr2+= changes[bestiter]*0.01;
4374 trackleterr2*= TMath::Max(14.-nfound,1.);
4375 trackleterr2+= 0.2*(tany-fgkExB)*(tany-fgkExB);
4377 tracklet.Set(xmean, track2.GetY()+moffset[bestiter], meanz[bestiter], track2.GetAlpha(), trackleterr2); //set tracklet parameters
4378 tracklet.SetTilt(h01);
4379 tracklet.SetP0(mean[bestiter]);
4380 tracklet.SetP1(angle[bestiter]);
4381 tracklet.SetN(nfound);
4382 tracklet.SetNCross(changes[bestiter]);
4383 tracklet.SetPlane(plane);
4384 tracklet.SetSigma2(expectederr);
4385 tracklet.SetChi2(tchi2s[bestiter]);
4386 tracklet.SetMaxPos(maxpos,maxpos4,maxpos5);
4387 track->fTracklets[plane] = tracklet;
4388 track->fNWrong+=nbad[0];
4392 TClonesArray array0("AliTRDcluster");
4393 TClonesArray array1("AliTRDcluster");
4394 array0.ExpandCreateFast(t1-t0+1);
4395 array1.ExpandCreateFast(t1-t0+1);
4396 TTreeSRedirector& cstream = *fDebugStreamer;
4397 AliTRDcluster dummy;
4401 for (Int_t it=0;it<t1-t0;it++){
4402 dy0[it] = dy[0][it];
4403 dyb[it] = dy[best[bestiter][it]][it];
4405 new(array0[it]) AliTRDcluster(*cl[0][it]);
4408 new(array0[it]) AliTRDcluster(dummy);
4410 if(cl[best[bestiter][it]][it]) {
4411 new(array1[it]) AliTRDcluster(*cl[best[bestiter][it]][it]);
4414 new(array1[it]) AliTRDcluster(dummy);
4417 TGraph graph0(t1-t0,x,dy0);
4418 TGraph graph1(t1-t0,x,dyb);
4419 TGraph graphy(t1-t0,x,yt);
4420 TGraph graphz(t1-t0,x,zt);
4423 cstream<<"tracklet"<<
4424 "track.="<<track<< // track parameters
4425 "tany="<<tany<< // tangent of the local track angle
4426 "xmean="<<xmean<< // xmean - reference x of tracklet
4427 "tilt="<<h01<< // tilt angle
4428 "nall="<<nall<< // number of foundable clusters
4429 "nfound="<<nfound<< // number of found clusters
4430 "clfound="<<clfound<< // total number of found clusters in road
4431 "mpads="<<mpads<< // mean number of pads per cluster
4432 "plane="<<plane<< // plane number
4433 "road="<<road<< // the width of the used road
4434 "graph0.="<<&graph0<< // x - y = dy for closest cluster
4435 "graph1.="<<&graph1<< // x - y = dy for second closest cluster
4436 "graphy.="<<&graphy<< // y position of the track
4437 "graphz.="<<&graphz<< // z position of the track
4438 // "fCl.="<<&array0<< // closest cluster
4439 // "fCl2.="<<&array1<< // second closest cluster
4440 "maxpos="<<maxpos<< // maximal charge postion
4441 "maxcharge="<<maxcharge<< // maximal charge
4442 "maxpos4="<<maxpos4<< // maximal charge postion - after bin 4
4443 "maxcharge4="<<maxcharge4<< // maximal charge - after bin 4
4444 "maxpos5="<<maxpos5<< // maximal charge postion - after bin 5
4445 "maxcharge5="<<maxcharge5<< // maximal charge - after bin 5
4447 "bestiter="<<bestiter<< // best iteration number
4448 "tracklet.="<<&tracklet<< // corrspond to the best iteration
4449 "tchi20="<<tchi2s[0]<< // chi2 of cluster in the 0 iteration
4450 "tchi2b="<<tchi2s[bestiter]<< // chi2 of cluster in the best iteration
4451 "sigmas0="<<sigmas[0]<< // residuals sigma
4452 "sigmasb="<<sigmas[bestiter]<< // residulas sigma
4454 "ngood0="<<ngood[0]<< // number of good clusters in 0 iteration
4455 "nbad0="<<nbad[0]<< // number of bad clusters in 0 iteration
4456 "ngoodb="<<ngood[bestiter]<< // in best iteration
4457 "nbadb="<<nbad[bestiter]<< // in best iteration
4459 "changes0="<<changes[0]<< // changes of pardrows in iteration number 0
4460 "changesb="<<changes[bestiter]<< // changes of pardrows in best iteration
4462 "moffset0="<<moffset[0]<< // offset fixing angle in iter=0
4463 "smoffset0="<<smoffset[0]<< // sigma of offset fixing angle in iter=0
4464 "moffsetb="<<moffset[bestiter]<< // offset fixing angle in iter=best
4465 "smoffsetb="<<smoffset[bestiter]<< // sigma of offset fixing angle in iter=best
4467 "mean0="<<mean[0]<< // mean dy in iter=0;
4468 "smean0="<<smean[0]<< // sigma of mean dy in iter=0
4469 "meanb="<<mean[bestiter]<< // mean dy in iter=best
4470 "smeanb="<<smean[bestiter]<< // sigma of mean dy in iter=best
4472 "angle0="<<angle[0]<< // angle deviation in the iteration number 0
4473 "sangle0="<<sangle[0]<< // sigma of angular deviation in iteration number 0
4474 "angleb="<<angle[bestiter]<< // angle deviation in the best iteration
4475 "sangleb="<<sangle[bestiter]<< // sigma of angle deviation in the best iteration
4477 "expectederr="<<expectederr<< // expected error of cluster position
4485 Int_t AliTRDtracker::Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down)
4488 // Sort eleements according occurancy
4489 // The size of output array has is 2*n
4491 Int_t * sindexS = new Int_t[n]; // temp array for sorting
4492 Int_t * sindexF = new Int_t[2*n];
4493 for (Int_t i=0;i<n;i++) sindexF[i]=0;
4495 TMath::Sort(n,inlist, sindexS, down);
4496 Int_t last = inlist[sindexS[0]];
4499 sindexF[0+n] = last;
4503 for(Int_t i=1;i<n; i++){
4504 val = inlist[sindexS[i]];
4505 if (last == val) sindexF[countPos]++;
4508 sindexF[countPos+n] = val;
4509 sindexF[countPos]++;
4513 if (last==val) countPos++;
4514 // sort according frequency
4515 TMath::Sort(countPos, sindexF, sindexS, kTRUE);
4516 for (Int_t i=0;i<countPos;i++){
4517 outlist[2*i ] = sindexF[sindexS[i]+n];
4518 outlist[2*i+1] = sindexF[sindexS[i]];
4526 AliTRDtrack * AliTRDtracker::RegisterSeed(AliTRDseed * seeds, Double_t * params)
4531 Double_t alpha=AliTRDgeometry::GetAlpha();
4532 Double_t shift=AliTRDgeometry::GetAlpha()/2.;
4535 c[1] = 0 ; c[2] = 2;
4536 c[3] = 0 ; c[4] = 0; c[5] = 0.02;
4537 c[6] = 0 ; c[7] = 0; c[8] = 0; c[9] = 0.1;
4538 c[10] = 0 ; c[11] = 0; c[12] = 0; c[13] = 0.0; c[14] = params[5]*params[5]*0.01;
4541 AliTRDcluster *cl =0;
4542 for (Int_t ilayer=0;ilayer<6;ilayer++){
4543 if (seeds[ilayer].isOK()){
4544 for (Int_t itime=22;itime>0;itime--){
4545 if (seeds[ilayer].fIndexes[itime]>0){
4546 index = seeds[ilayer].fIndexes[itime];
4547 cl = seeds[ilayer].fClusters[itime];
4554 if (cl==0) return 0;
4555 AliTRDtrack * track = new AliTRDtrack(cl,index,¶ms[1],c, params[0],params[6]*alpha+shift);
4556 track->PropagateTo(params[0]-5.);
4557 track->ResetCovariance(1);
4559 Int_t rc=FollowBackProlongationG(*track);
4565 CookdEdxTimBin(*track);
4566 CookLabel(track, 0.9);
4576 AliTRDseed::AliTRDseed()
4580 fTilt =0; // tilting angle
4581 fPadLength = 0; // pad length
4582 fX0 = 0; // x0 position
4583 for (Int_t i=0;i<25;i++){
4584 fX[i]=0; // !x position
4585 fY[i]=0; // !y position
4586 fZ[i]=0; // !z position
4587 fIndexes[i]=0; // !indexes
4588 fClusters[i]=0; // !clusters
4590 for (Int_t i=0;i<2;i++){
4591 fYref[i]=0; // reference y
4592 fZref[i]=0; // reference z
4593 fYfit[i]=0; // y fit position +derivation
4594 fYfitR[i]=0; // y fit position +derivation
4595 fZfit[i]=0; // z fit position
4596 fZfitR[i]=0; // z fit position
4597 fLabels[i]=0; // labels
4601 fMeanz=0; // mean vaue of z
4602 fZProb=0; // max probbable z
4605 fN=0; // number of associated clusters
4606 fN2=0; // number of not crossed
4607 fNUsed=0; // number of used clusters
4608 fNChange=0; // change z counter
4611 void AliTRDseed::Reset(){
4615 for (Int_t i=0;i<25;i++){
4616 fX[i]=0; // !x position
4617 fY[i]=0; // !y position
4618 fZ[i]=0; // !z position
4619 fIndexes[i]=0; // !indexes
4620 fClusters[i]=0; // !clusters
4621 fUsable[i] = kFALSE;
4623 for (Int_t i=0;i<2;i++){
4624 fYref[i]=0; // reference y
4625 fZref[i]=0; // reference z
4626 fYfit[i]=0; // y fit position +derivation
4627 fYfitR[i]=0; // y fit position +derivation
4628 fZfit[i]=0; // z fit position
4629 fZfitR[i]=0; // z fit position
4630 fLabels[i]=-1; // labels
4632 fSigmaY =0; //"robust" sigma in y
4633 fSigmaY2=0; //"robust" sigma in y
4634 fMeanz =0; // mean vaue of z
4635 fZProb =0; // max probbable z
4638 fN=0; // number of associated clusters
4639 fN2=0; // number of not crossed
4640 fNUsed=0; // number of used clusters
4641 fNChange=0; // change z counter
4644 void AliTRDseed::CookLabels(){
4646 // cook 2 labels for seed
4651 for (Int_t i=0;i<25;i++){
4652 if (!fClusters[i]) continue;
4653 for (Int_t ilab=0;ilab<3;ilab++){
4654 if (fClusters[i]->GetLabel(ilab)>=0){
4655 labels[nlab] = fClusters[i]->GetLabel(ilab);
4660 Int_t nlab2 = AliTRDtracker::Freq(nlab,labels,out,kTRUE);
4661 fLabels[0] = out[0];
4662 if (nlab2>1 && out[3]>1) fLabels[1] =out[2];
4665 void AliTRDseed::UseClusters()
4670 for (Int_t i=0;i<25;i++){
4671 if (!fClusters[i]) continue;
4672 if (!(fClusters[i]->IsUsed())) fClusters[i]->Use();
4677 void AliTRDseed::Update(){
4681 const Float_t ratio = 0.8;
4682 const Int_t kClmin = 6;
4683 const Float_t kmaxtan = 2;
4684 if (TMath::Abs(fYref[1])>kmaxtan) return; // too much inclined track
4686 Float_t sigmaexp = 0.05+TMath::Abs(fYref[1]*0.25); // expected r.m.s in y direction
4687 Float_t ycrosscor = fPadLength*fTilt*0.5; // y correction for crossing
4690 Double_t sumw, sumwx,sumwx2;
4691 Double_t sumwy, sumwxy, sumwz,sumwxz;
4692 Int_t zints[25]; // histograming of the z coordinate - get 1 and second max probable coodinates in z
4694 Float_t allowedz[25]; // allowed z for given time bin
4695 Float_t yres[25]; // residuals from reference
4696 Float_t anglecor = fTilt*fZref[1]; //correction to the angle
4700 for (Int_t i=0;i<25;i++){
4702 if (!fClusters[i]) continue;
4703 yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y
4704 zints[fN] = Int_t(fZ[i]);
4707 if (fN<kClmin) return;
4708 Int_t nz = AliTRDtracker::Freq(fN,zints,zouts,kFALSE);
4710 if (nz<=1) zouts[3]=0;
4711 if (zouts[1]+zouts[3]<kClmin) return;
4713 if (TMath::Abs(zouts[0]-zouts[2])>12.) zouts[3]=0; // z distance bigger than pad - length
4715 Int_t breaktime = -1;
4716 Bool_t mbefore = kFALSE;
4718 Int_t counts[2]={0,0};
4722 // find the break time allowing one chage on pad-rows with maximal numebr of accepted clusters
4725 for (Int_t i=0;i<25;i++){
4726 cumul[i][0] = counts[0];
4727 cumul[i][1] = counts[1];
4728 if (TMath::Abs(fZ[i]-zouts[0])<2) counts[0]++;
4729 if (TMath::Abs(fZ[i]-zouts[2])<2) counts[1]++;
4732 for (Int_t i=0;i<24;i++) {
4733 Int_t after = cumul[24][0]-cumul[i][0];
4734 Int_t before = cumul[i][1];
4735 if (after+before>maxcount) {
4736 maxcount=after+before;
4740 after = cumul[24][1]-cumul[i][1];
4741 before = cumul[i][0];
4742 if (after+before>maxcount) {
4743 maxcount=after+before;
4750 for (Int_t i=0;i<25;i++){
4751 if (i>breaktime) allowedz[i] = mbefore ? zouts[2]:zouts[0];
4752 if (i<=breaktime) allowedz[i] = (!mbefore) ? zouts[2]:zouts[0];
4754 if ( (allowedz[0]>allowedz[24] && fZref[1]<0) || (allowedz[0]<allowedz[24] && fZref[1]>0)){
4756 // tracklet z-direction not in correspondance with track z direction
4759 for (Int_t i=0;i<25;i++){
4760 allowedz[i] = zouts[0]; //only longest taken
4766 // cross pad -row tracklet - take the step change into account
4768 for (Int_t i=0;i<25;i++){
4769 if (!fClusters[i]) continue;
4770 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
4771 yres[i] = fY[i]-fYref[0]-(fYref[1]+anglecor)*fX[i]; // residual y
4772 if (TMath::Abs(fZ[i]-fZProb)>2){
4773 if (fZ[i]>fZProb) yres[i]+=fTilt*fPadLength;
4774 if (fZ[i]<fZProb) yres[i]-=fTilt*fPadLength;
4780 Double_t mean,sigma;
4781 for (Int_t i=0;i<25;i++){
4782 if (!fClusters[i]) continue;
4783 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
4784 yres2[fN2] = yres[i];
4791 EvaluateUni(fN2,yres2,mean,sigma,Int_t(fN2*ratio-2));
4792 if (sigma<sigmaexp*0.8) sigma=sigmaexp;
4797 sumw=0; sumwx=0; sumwx2=0;
4798 sumwy=0; sumwxy=0; sumwz=0;sumwxz=0;
4803 for (Int_t i=0;i<25;i++){
4805 if (!fClusters[i]) continue;
4806 if (TMath::Abs(fZ[i]-allowedz[i])>2) continue;
4807 if (TMath::Abs(yres[i]-mean)>4.*sigma) continue;
4810 fMPads+=fClusters[i]->GetNPads();
4812 if (fClusters[i]->GetNPads()>4) weight=0.5;
4813 if (fClusters[i]->GetNPads()>5) weight=0.2;
4816 sumw+=weight; sumwx+=x*weight; sumwx2+=x*x*weight;
4817 sumwy+=weight*yres[i]; sumwxy+=weight*(yres[i])*x;
4818 sumwz+=weight*fZ[i]; sumwxz+=weight*fZ[i]*x;
4824 fMeanz = sumwz/sumw;
4825 Float_t correction =0;
4827 // tracklet on boundary
4828 if (fMeanz<fZProb) correction = ycrosscor;
4829 if (fMeanz>fZProb) correction = -ycrosscor;
4831 Double_t det = sumw*sumwx2-sumwx*sumwx;
4832 fYfitR[0] = (sumwx2*sumwy-sumwx*sumwxy)/det;
4833 fYfitR[1] = (sumw*sumwxy-sumwx*sumwy)/det;
4836 for (Int_t i=0;i<25;i++){
4837 if (!fUsable[i]) continue;
4838 Float_t delta = yres[i]-fYfitR[0]-fYfitR[1]*fX[i];
4839 fSigmaY2+=delta*delta;
4841 fSigmaY2 = TMath::Sqrt(fSigmaY2/Float_t(fN2-2));
4843 fZfitR[0] = (sumwx2*sumwz-sumwx*sumwxz)/det;
4844 fZfitR[1] = (sumw*sumwxz-sumwx*sumwz)/det;
4845 fZfit[0] = (sumwx2*sumwz-sumwx*sumwxz)/det;
4846 fZfit[1] = (sumw*sumwxz-sumwx*sumwz)/det;
4847 fYfitR[0] += fYref[0]+correction;
4848 fYfitR[1] += fYref[1];
4849 fYfit[0] = fYfitR[0];
4850 fYfit[1] = fYfitR[1];
4861 void AliTRDseed::UpdateUsed(){
4864 for (Int_t i=0;i<25;i++){
4865 if (!fClusters[i]) continue;
4866 if ((fClusters[i]->IsUsed())) fNUsed++;
4871 void AliTRDseed::EvaluateUni(Int_t nvectors, Double_t *data, Double_t &mean, Double_t &sigma, Int_t hh)
4874 // robust estimator in 1D case MI version
4876 //for the univariate case
4877 //estimates of location and scatter are returned in mean and sigma parameters
4878 //the algorithm works on the same principle as in multivariate case -
4879 //it finds a subset of size hh with smallest sigma, and then returns mean and
4880 //sigma of this subset
4884 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};
4885 Int_t *index=new Int_t[nvectors];
4886 TMath::Sort(nvectors, data, index, kFALSE);
4888 Int_t nquant = TMath::Min(Int_t(Double_t(((hh*1./nvectors)-0.5)*40))+1, 11);
4889 Double_t factor = faclts[nquant-1];
4894 Int_t bestindex = -1;
4895 Double_t bestmean = 0;
4896 Double_t bestsigma = data[index[nvectors-1]]-data[index[0]]; // maximal possible sigma
4897 for (Int_t i=0; i<hh; i++){
4898 sumx += data[index[i]];
4899 sumx2 += data[index[i]]*data[index[i]];
4902 Double_t norm = 1./Double_t(hh);
4903 Double_t norm2 = 1./Double_t(hh-1);
4904 for (Int_t i=hh; i<nvectors; i++){
4905 Double_t cmean = sumx*norm;
4906 Double_t csigma = (sumx2 - hh*cmean*cmean)*norm2;
4907 if (csigma<bestsigma){
4914 sumx += data[index[i]]-data[index[i-hh]];
4915 sumx2 += data[index[i]]*data[index[i]]-data[index[i-hh]]*data[index[i-hh]];
4918 Double_t bstd=factor*TMath::Sqrt(TMath::Abs(bestsigma));
4925 Float_t AliTRDseed::FitRiemanTilt(AliTRDseed * cseed, Bool_t terror){
4929 TLinearFitter fitterT2(4,"hyp4"); // fitting with tilting pads - kz not fixed
4930 fitterT2.StoreData(kTRUE);
4931 Float_t xref2 = (cseed[2].fX0+cseed[3].fX0)*0.5; // reference x0 for z
4934 fitterT2.ClearPoints();
4935 for (Int_t iLayer=0; iLayer<6;iLayer++){
4936 if (!cseed[iLayer].isOK()) continue;
4937 Double_t tilt = cseed[iLayer].fTilt;
4939 for (Int_t itime=0;itime<25;itime++){
4940 if (!cseed[iLayer].fUsable[itime]) continue;
4941 Double_t x = cseed[iLayer].fX[itime]+cseed[iLayer].fX0-xref2; // x relative to the midle chamber
4942 Double_t y = cseed[iLayer].fY[itime];
4943 Double_t z = cseed[iLayer].fZ[itime];
4947 Double_t x2 = cseed[iLayer].fX[itime]+cseed[iLayer].fX0; // global x
4948 Double_t t = 1./(x2*x2+y*y);
4950 uvt[0] = 2.*x2*uvt[1]; // u
4951 uvt[2] = 2.0*tilt*uvt[1];
4952 uvt[3] = 2.0*tilt*x*uvt[1];
4953 uvt[4] = 2.0*(y+tilt*z)*uvt[1];
4955 Double_t error = 2*uvt[1];
4956 if (terror) error*=cseed[iLayer].fSigmaY;
4957 else {error *=0.2;} //default error
4958 fitterT2.AddPoint(uvt,uvt[4],error);
4963 Double_t rpolz0 = fitterT2.GetParameter(3);
4964 Double_t rpolz1 = fitterT2.GetParameter(4);
4966 // linear fitter - not possible to make boundaries
4967 // non accept non possible z and dzdx combination
4969 Bool_t acceptablez =kTRUE;
4970 for (Int_t iLayer=0; iLayer<6;iLayer++){
4971 if (cseed[iLayer].isOK()){
4972 Double_t zT2 = rpolz0+rpolz1*(cseed[iLayer].fX0 - xref2);
4973 if (TMath::Abs(cseed[iLayer].fZProb-zT2)>cseed[iLayer].fPadLength*0.5+1)
4974 acceptablez = kFALSE;
4978 Double_t zmf = cseed[2].fZref[0]+cseed[2].fZref[1]*(xref2-cseed[2].fX0);
4979 Double_t dzmf = (cseed[2].fZref[1]+ cseed[3].fZref[1])*0.5;
4980 fitterT2.FixParameter(3,zmf);
4981 fitterT2.FixParameter(4,dzmf);
4983 fitterT2.ReleaseParameter(3);
4984 fitterT2.ReleaseParameter(4);
4985 rpolz0 = fitterT2.GetParameter(3);
4986 rpolz1 = fitterT2.GetParameter(4);
4989 Double_t chi2TR = fitterT2.GetChisquare()/Float_t(npointsT);
4991 params[0] = fitterT2.GetParameter(0);
4992 params[1] = fitterT2.GetParameter(1);
4993 params[2] = fitterT2.GetParameter(2);
4994 Double_t CR = 1+params[1]*params[1]-params[2]*params[0];
4995 for (Int_t iLayer = 0; iLayer<6;iLayer++){
4996 Double_t x = cseed[iLayer].fX0;
4997 Double_t y=0,dy=0, z=0, dz=0;
4999 Double_t res2 = (x*params[0]+params[1]);
5001 res2 = 1.-params[2]*params[0]+params[1]*params[1]-res2;
5003 res2 = TMath::Sqrt(res2);
5004 y = (1-res2)/params[0];
5007 Double_t x0 = -params[1]/params[0];
5008 if (-params[2]*params[0]+params[1]*params[1]+1>0){
5009 Double_t Rm1 = params[0]/TMath::Sqrt(-params[2]*params[0]+params[1]*params[1]+1);
5010 if ( 1./(Rm1*Rm1)-(x-x0)*(x-x0)>0){
5011 Double_t res = (x-x0)/TMath::Sqrt(1./(Rm1*Rm1)-(x-x0)*(x-x0));
5012 if (params[0]<0) res*=-1.;
5016 z = rpolz0+rpolz1*(x-xref2);
5018 cseed[iLayer].fYref[0] = y;
5019 cseed[iLayer].fYref[1] = dy;
5020 cseed[iLayer].fZref[0] = z;
5021 cseed[iLayer].fZref[1] = dz;
5022 cseed[iLayer].fC = CR;