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 **************************************************************************/
16 //-----------------------------------------------------------------//
18 // AliTOFtracker Class //
19 // Task: Perform association of the ESD tracks to TOF Clusters //
20 // and Update ESD track with associated TOF Cluster parameters //
22 //-----------------------------------------------------------------//
26 #include "TClonesArray.h"
27 #include "TObjArray.h"
29 #include "TTreeStream.h"
31 #include "AliESDEvent.h"
32 #include "AliESDtrack.h"
33 #include "AliESDpid.h"
35 #include "AliTOFRecoParam.h"
36 #include "AliTOFReconstructor.h"
37 #include "AliTOFcluster.h"
38 #include "AliTOFGeometry.h"
39 #include "AliTOFtrackerMI.h"
40 #include "AliTOFtrack.h"
42 #include "AliMathBase.h"
46 extern TGeoManager *gGeoManager;
48 ClassImp(AliTOFtrackerMI)
50 //_____________________________________________________________________________
51 AliTOFtrackerMI::AliTOFtrackerMI():
67 fTracks(new TClonesArray("AliTOFtrack")),
68 fSeeds(new TObjArray(100)),
71 //AliTOFtrackerMI main Ctor
73 for (Int_t ii=0; ii<kMaxCluster; ii++) fClusters[ii]=0x0;
75 fDy=AliTOFGeometry::XPad();
76 fDz=AliTOFGeometry::ZPad();
77 fDebugStreamer = new TTreeSRedirector("TOFdebug.root");
80 //_____________________________________________________________________________
81 AliTOFtrackerMI::~AliTOFtrackerMI(){
86 //fDebugStreamer->Close();
87 delete fDebugStreamer;
103 for (Int_t ii=0; ii<kMaxCluster; ii++)
104 if (fClusters[ii]) fClusters[ii]->Delete();
108 //_____________________________________________________________________________
109 void AliTOFtrackerMI::GetPidSettings(AliESDpid *esdPID) {
111 // Sets TOF resolution from RecoParams
114 esdPID->GetTOFResponse().SetTimeResolution(fkRecoParam->GetTimeResolution());
116 AliWarning("fkRecoParam not yet set; cannot set PID settings");
119 //_____________________________________________________________________________
120 Int_t AliTOFtrackerMI::PropagateBack(AliESDEvent * const event) {
122 // Gets seeds from ESD event and Match with TOF Clusters
125 // initialize RecoParam for current event
126 AliDebug(1,"Initializing params for TOF");
128 fkRecoParam = AliTOFReconstructor::GetRecoParam(); // instantiate reco param from STEER...
130 if (fkRecoParam == 0x0) {
131 AliFatal("No Reco Param found for TOF!!!");
133 //fkRecoParam->Dump();
134 //if(fkRecoParam->GetApplyPbPbCuts())fkRecoParam=fkRecoParam->GetPbPbparam();
135 //fkRecoParam->PrintParameters();
137 //Initialise some counters
146 Int_t ntrk=event->GetNumberOfTracks();
149 //Load ESD tracks into a local Array of ESD Seeds
150 for (Int_t i=0; i<fNseeds; i++)
151 fSeeds->AddLast(event->GetTrack(i));
153 //Prepare ESD tracks candidates for TOF Matching
156 //First Step with Strict Matching Criterion
157 //MatchTracks(kFALSE);
159 //Second Step with Looser Matching Criterion
160 //MatchTracks(kTRUE);
161 MatchTracksMI(kFALSE); // assign track to clusters
162 MatchTracksMI(kTRUE); // assign clusters to esd
164 AliInfo(Form("Number of matched tracks = %d (good = %d, bad = %d)",fnmatch,fngoodmatch,fnbadmatch));
166 //Update the matched ESD tracks
168 for (Int_t i=0; i<ntrk; i++) {
169 AliESDtrack *t=event->GetTrack(i);
170 AliESDtrack *seed =(AliESDtrack*)fSeeds->At(i);
172 if ( (seed->GetStatus()&AliESDtrack::kTOFin)!=0 ) {
173 t->SetStatus(AliESDtrack::kTOFin);
174 //if(seed->GetTOFsignal()>0){
175 if ( (seed->GetStatus()&AliESDtrack::kTOFout)!=0 ) {
176 t->SetStatus(AliESDtrack::kTOFout);
177 t->SetTOFsignal(seed->GetTOFsignal());
178 t->SetTOFcluster(seed->GetTOFcluster());
179 Int_t tlab[3]; seed->GetTOFLabel(tlab);
180 t->SetTOFLabel(tlab);
183 // by calling the AliESDtrack::UpdateTrackParams,
184 // the current track parameters are changed
185 // and it could cause refit problems.
186 // We need to update only the following track parameters:
187 // the track length and expected times.
188 // Removed AliESDtrack::UpdateTrackParams call
189 // Called AliESDtrack::SetIntegratedTimes(...) and
190 // AliESDtrack::SetIntegratedLength() routines.
192 AliTOFtrack *track = new AliTOFtrack(*seed);
193 t->UpdateTrackParams(track,AliESDtrack::kTOFout);
197 Double_t times[10]; seed->GetIntegratedTimes(times);
198 t->SetIntegratedTimes(times);
199 t->SetIntegratedLength(seed->GetIntegratedLength());
200 t->SetTOFsignalToT(seed->GetTOFsignalToT());
201 t->SetTOFCalChannel(seed->GetTOFCalChannel());
202 t->SetTOFDeltaBC(seed->GetTOFDeltaBC());
203 t->SetTOFL0L1(seed->GetTOFL0L1());
205 // Make attention, please:
206 // AliESDtrack::fTOFInfo array does not be stored in the AliESDs.root file
207 // it is there only for a check during the reconstruction step.
209 seed->GetTOFInfo(info);
223 //_________________________________________________________________________
224 void AliTOFtrackerMI::CollectESD() {
225 //prepare the set of ESD tracks to be matched to clusters in TOF
227 TClonesArray &aTOFTrack = *fTracks;
230 for (Int_t i=0; i<fNseeds; i++) {
232 AliESDtrack *t =(AliESDtrack*)fSeeds->At(i);
233 if ((t->GetStatus()&AliESDtrack::kTPCout)==0)continue;
235 AliTOFtrack *track = new AliTOFtrack(*t); // New
236 Float_t x = (Float_t)track->GetX(); //New
238 // TRD good tracks, already propagated at 371 cm
239 if ( ( (t->GetStatus()&AliESDtrack::kTRDout)!=0 ) &&
240 ( x >= AliTOFGeometry::Rmin() ) ) {
241 if ( track->PropagateToInnerTOF() ) {
242 track->SetSeedIndex(i);
243 t->UpdateTrackParams(track,AliESDtrack::kTOFin);
244 new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
251 // Propagate the rest of TPCbp
253 if ( track->PropagateToInnerTOF() ) { // temporary solution
254 track->SetSeedIndex(i);
255 t->UpdateTrackParams(track,AliESDtrack::kTOFin);
256 new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
265 printf("TRD\tOn\t%d\tOff\t%d\n",c0,c1);
267 // Sort according uncertainties on track position
272 //_________________________________________________________________________
273 void AliTOFtrackerMI::MatchTracks( Bool_t /*mLastStep*/) const {
278 //_________________________________________________________________________
279 void AliTOFtrackerMI::MatchTracksMI(Bool_t mLastStep){
281 //Match ESD tracks to clusters in TOF
282 const Float_t kTofOffset = 0; // time offset
283 const Float_t kMinQuality = -6.; // minimal quality
284 const Float_t kMaxQualityD = 1.; // max delta quality if cluster used
285 const Float_t kForbiddenR = 0.1; // minimal PID according TPC
287 static const Double_t kMasses[]={
288 0.000511, 0.105658, 0.139570, 0.493677, 0.938272, 1.875613
291 Int_t nSteps=(Int_t)(fTOFHeigth/0.1);
293 //PH Arrays (moved outside of the loop)
294 Float_t * trackPos[4];
295 for (Int_t ii=0; ii<4; ii++) trackPos[ii] = new Float_t[nSteps];
296 Int_t * clind = new Int_t[fN];
299 const Int_t kNclusterMax = 1000; // related to fN value
300 AliTOFcluster *clusters[kNclusterMax];
301 Int_t index[kNclusterMax];
302 Float_t quality[kNclusterMax];
303 Float_t dist3D[kNclusterMax][6];
304 Double_t times[kNclusterMax][6];
305 Float_t mintimedist[kNclusterMax];
306 Float_t likelihood[kNclusterMax];
307 Float_t length[kNclusterMax];
308 Double_t tpcpid[AliPID::kSPECIES];
311 for (Int_t i=0; i<fNseedsTOF; i++) {
313 AliTOFtrack *track =(AliTOFtrack*)fTracks->UncheckedAt(i);
314 AliESDtrack *t =(AliESDtrack*)fSeeds->At(track->GetSeedIndex());
315 Bool_t hasTime = ( (t->GetStatus()& AliESDtrack::kTIME)>0) ? kTRUE:kFALSE; // did we integrate time
316 Float_t trdquality = t->GetTRDQuality();
320 t->GetTPCpid(tpcpid);
322 for (Int_t ipid=0;ipid<AliPID::kSPECIES;ipid++){
323 sumpid+=tpcpid[ipid];
325 for (Int_t ipid=0;ipid<AliPID::kSPECIES;ipid++){
326 if (sumpid>0) tpcpid[ipid]/=sumpid;
332 if (trdquality<0) continue; // no chance
334 AliTOFtrack *trackTOFin =new AliTOFtrack(*track);
336 //propagat track to the middle of TOF
338 Float_t xs = 379.2; // should be defined in the TOF geometry
339 Double_t ymax=xs*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());
341 Double_t ysect=trackTOFin->GetYat(xs,skip);
344 ymax=xs*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());
345 ysect=trackTOFin->GetYat(xs,skip);
348 if (!trackTOFin->Rotate(AliTOFGeometry::GetAlpha())) {
351 } else if (ysect <-ymax) {
352 if (!trackTOFin->Rotate(-AliTOFGeometry::GetAlpha())) {
356 if(!trackTOFin->PropagateTo(xs)) {
360 // Determine a window around the track
363 trackTOFin->GetExternalParameters(x,par);
365 trackTOFin->GetExternalCovariance(cov);
367 if (cov[0]<0. || cov[2]<0.) {
368 AliWarning(Form("Very strange track (%d)! At least one of its covariance matrix diagonal elements is negative!",i));
373 Float_t scalefact=3.;
376 ((5*TMath::Sqrt(TMath::Abs(cov[0])) + 3.*fDy + 10.*TMath::Abs(par[2]))/fR);
379 (5*TMath::Sqrt(TMath::Abs(cov[2])) + 3.*fDz + 10.*TMath::Abs(par[3]));
381 Double_t phi=TMath::ATan2(par[0],x) + trackTOFin->GetAlpha();
382 if (phi<-TMath::Pi())phi+=2*TMath::Pi();
383 if (phi>=TMath::Pi())phi-=2*TMath::Pi();
388 // find the clusters in the window of the track
390 for (Int_t k=FindClusterIndex(z-dz); k<fN; k++) {
392 if (nc>=kNclusterMax) {
393 AliWarning("No more matchable clusters can be stored! Please, increase the corresponding vectors size.");
397 AliTOFcluster *c=fClusters[k];
398 if (c->GetZ() > z+dz) break;
399 // if (c->IsUsed()) continue;
401 Double_t dph=TMath::Abs(c->GetPhi()-phi);
402 if (dph>TMath::Pi()) dph-=2.*TMath::Pi();
403 if (TMath::Abs(dph)>dphi) continue;
409 AliDebug(1,Form(" Number of matchable TOF clusters for the track number %d: %d",i,nc));
412 // select close clusters
414 Double_t mom=t->GetP();
415 // Bool_t dump = kTRUE;
416 for (Int_t icl=0; icl<nc; icl++){
417 Float_t distances[5];
419 index[nfound]=clind[icl];
420 AliTOFcluster *cluster = fClusters[clind[icl]];
421 GetLinearDistances(trackTOFin, cluster, distances);
422 dist3D[nfound][0] = distances[4];
423 dist3D[nfound][1] = distances[1];
424 dist3D[nfound][2] = distances[2];
426 if (TMath::Abs(dist3D[nfound][1])>20 || TMath::Abs(dist3D[nfound][2])>20) continue;
428 GetLikelihood(distances[1],distances[2],cov,trackTOFin, dist3D[nfound][3], dist3D[nfound][4]);
431 if (dist3D[nfound][3]*dist3D[nfound][4]<0.00000000000001) continue; // log likelihood
432 if (TMath::Log(dist3D[nfound][3]*dist3D[nfound][4])<-9) continue; // log likelihood
434 clusters[nfound] = cluster;
436 //length and TOF updates
437 trackTOFin->GetIntegratedTimes(times[nfound]);
438 length[nfound] = trackTOFin->GetIntegratedLength();
439 length[nfound]+=distances[4];
440 mintimedist[nfound]=1000;
441 Double_t tof2=AliTOFGeometry::TdcBinWidth()*cluster->GetTDC()+kTofOffset; // in ps
442 // Float_t tgamma = TMath::Sqrt(cluster->GetR()*cluster->GetR()+cluster->GetZ()*cluster->GetZ())/0.03; //time for "primary" gamma
443 //if (trackTOFin->GetPt()<0.7 && TMath::Abs(tgamma-tof2)<350) continue; // gamma conversion candidate - TEMPORARY
444 for(Int_t j=0;j<=5;j++ && 5<AliPID::kSPECIES){
445 Double_t mass=kMasses[j];
446 times[nfound][j]+=distances[4]/3e-2*TMath::Sqrt(mom*mom+mass*mass)/mom; // add time distance
447 if ( TMath::Abs(times[nfound][j]-tof2)<mintimedist[nfound] && tpcpid[j]>kForbiddenR){
448 mintimedist[nfound]=TMath::Abs(times[nfound][j]-tof2);
452 Float_t liketime = TMath::Exp(-mintimedist[nfound]/90.)+0.25*TMath::Exp(-mintimedist[nfound]/180.);
453 if (!hasTime) liketime=0.2;
454 likelihood[nfound] = TMath::Log(dist3D[nfound][3]*dist3D[nfound][4]*liketime);
456 if (TMath::Log(dist3D[nfound][3]*dist3D[nfound][4])<-1){
457 if (likelihood[nfound]<-9.) continue;
463 AliDebug(1,Form(" Number of track points for the track number %d: %d",i,nfound));
471 //choose the best cluster
473 //Float_t quality[kNclusterMax];
474 //Int_t index[kNclusterMax];
475 for (Int_t kk=0; kk<kNclusterMax; kk++) quality[kk]=0;
477 AliTOFcluster * cgold=0;
479 for (Int_t icl=0;icl<nfound;icl++){
480 quality[icl] = dist3D[icl][3]*dist3D[icl][4];
482 TMath::Sort(nfound,quality,index,kTRUE);
484 cgold = clusters[igold];
485 if (nfound>1 &&likelihood[index[1]]>likelihood[index[0]]){
486 if ( quality[index[0]]<quality[index[1]]+0.5){
488 cgold = clusters[igold];
493 Float_t qualityGold = TMath::Log(0.0000001+(quality[igold]*(0.1+TMath::Exp(-mintimedist[igold]/80.))*(0.2+trdquality)));
495 if (cgold->GetQuality()<qualityGold) cgold->SetQuality(qualityGold);
500 //signed better cluster
501 if (cgold->GetQuality()>qualityGold+kMaxQualityD) continue;
502 if (2.*qualityGold-cgold->GetQuality()<kMinQuality) continue;
507 for (Int_t icl=0;icl<nfound;icl++){
509 (clusters[index[icl]]->GetLabel(0)==TMath::Abs(trackTOFin->GetLabel()))
511 (clusters[index[icl]]->GetLabel(1)==TMath::Abs(trackTOFin->GetLabel()))
513 (clusters[index[icl]]->GetLabel(2)==TMath::Abs(trackTOFin->GetLabel()))
520 if (inonfake==0) fngoodmatch++;
526 tlab[0]=cgold->GetLabel(0);
527 tlab[1]=cgold->GetLabel(1);
528 tlab[2]=cgold->GetLabel(2);
529 // Double_t tof2=25.*cgold->GetTDC()-350; // in ps
530 Double_t tof2=AliTOFGeometry::TdcBinWidth()*cgold->GetTDC()+kTofOffset; // in ps
531 Float_t tgamma = TMath::Sqrt(cgold->GetR()*cgold->GetR()+cgold->GetZ()*cgold->GetZ())/0.03;
532 Float_t info[10]={dist3D[igold][0],
541 cgold->GetQuality()};
542 // GetLinearDistances(trackTOFin,cgold,&info[6]);
545 // info[7] = mintimedist[index[inonfake]];
548 // Store quantities to be used for TOF Calibration
549 Float_t tToT=cgold->GetToT(); // in ps
550 t->SetTOFsignalToT(tToT);
552 ind[0]=cgold->GetDetInd(0);
553 ind[1]=cgold->GetDetInd(1);
554 ind[2]=cgold->GetDetInd(2);
555 ind[3]=cgold->GetDetInd(3);
556 ind[4]=cgold->GetDetInd(4);
557 Int_t calindex = AliTOFGeometry::GetIndex(ind);
558 t->SetTOFCalChannel(calindex);
561 t->SetTOFsignal(tof2);
562 t->SetTOFcluster(cgold->GetIndex());
563 t->SetTOFDeltaBC(cgold->GetDeltaBC());
564 t->SetTOFL0L1(cgold->GetL0L1Latency());
566 AliDebug(2, Form("%7i %7i %10i %10i %10i %10i %7i",
569 TMath::Abs(trackTOFin->GetLabel()),
570 tlab[0], tlab[1], tlab[2],
573 AliTOFtrack *trackTOFout = new AliTOFtrack(*t);
574 trackTOFout->PropagateTo(379.);
576 // Fill the track residual histograms.
577 FillResiduals(trackTOFout,cgold,kFALSE);
579 t->UpdateTrackParams(trackTOFout,AliESDtrack::kTOFout);
580 t->SetIntegratedLength(length[igold]);
581 t->SetIntegratedTimes(times[igold]);
582 t->SetTOFLabel(tlab);
591 for (Int_t ii=0; ii<4; ii++) delete [] trackPos[ii];
593 //delete calib; // AdC
595 //_________________________________________________________________________
597 Int_t AliTOFtrackerMI::LoadClusters(TTree *cTree) {
598 //--------------------------------------------------------------------
599 //This function loads the TOF clusters
600 //--------------------------------------------------------------------
602 TBranch *branch=cTree->GetBranch("TOF");
604 AliError("can't get the branch with the TOF clusters !");
608 static TClonesArray dummy("AliTOFcluster",10000);
610 TClonesArray *clusters=&dummy;
611 branch->SetAddress(&clusters);
614 Int_t nc=clusters->GetEntriesFast();
615 AliInfo(Form("Number of clusters: %d",nc));
617 for (Int_t i=0; i<nc; i++) {
618 AliTOFcluster *c=(AliTOFcluster*)clusters->UncheckedAt(i);
620 //PH fClusters[i]=new AliTOFcluster(*c); fN++;
621 fClusters[i]=c; fN++;
623 //AliInfo(Form("%4i %4i %f %f %f %f %f %2i %1i %2i %1i %2i",i, fClusters[i]->GetIndex(),fClusters[i]->GetZ(),fClusters[i]->GetR(),fClusters[i]->GetPhi(), fClusters[i]->GetTDC(),fClusters[i]->GetADC(),fClusters[i]->GetDetInd(0),fClusters[i]->GetDetInd(1),fClusters[i]->GetDetInd(2),fClusters[i]->GetDetInd(3),fClusters[i]->GetDetInd(4)));
624 //AliInfo(Form("%i %f",i, fClusters[i]->GetZ()));
627 //AliInfo(Form("Number of clusters: %d",fN));
631 //_________________________________________________________________________
632 void AliTOFtrackerMI::UnloadClusters() {
633 //--------------------------------------------------------------------
634 //This function unloads TOF clusters
635 //--------------------------------------------------------------------
636 for (Int_t i=0; i<fN; i++) {
637 //PH delete fClusters[i];
646 //_________________________________________________________________________
647 Int_t AliTOFtrackerMI::InsertCluster(AliTOFcluster *c) {
648 //--------------------------------------------------------------------
649 //This function adds a cluster to the array of clusters sorted in Z
650 //--------------------------------------------------------------------
651 if (fN==kMaxCluster) {
652 AliError("Too many clusters !");
656 if (fN==0) {fClusters[fN++]=c; return 0;}
657 Int_t i=FindClusterIndex(c->GetZ());
658 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTOFcluster*));
659 fClusters[i]=c; fN++;
664 //_________________________________________________________________________
665 Int_t AliTOFtrackerMI::FindClusterIndex(Double_t z) const {
666 //--------------------------------------------------------------------
667 // This function returns the index of the nearest cluster
668 //--------------------------------------------------------------------
670 if (z <= fClusters[0]->GetZ()) return 0;
671 if (z > fClusters[fN-1]->GetZ()) return fN;
672 Int_t b=0, e=fN-1, m=(b+e)/2;
673 for (; b<e; m=(b+e)/2) {
674 if (z > fClusters[m]->GetZ()) b=m+1;
680 //_________________________________________________________________________
681 Float_t AliTOFtrackerMI::GetLinearDistances(AliTOFtrack * track, AliTOFcluster *cluster, Float_t distances[5])
684 // calclates distance between cluster and track
685 // use linear aproximation
687 //const Float_t kRaddeg = 180/3.14159265358979312;
688 const Float_t kRaddeg = TMath::RadToDeg();
690 // Float_t tiltangle = fGeom->GetAngles(cluster->fdetIndex[1],cluster->fdetIndex[2])/kRaddeg; //tiltangle
692 cind[0]= cluster->GetDetInd(0);
693 cind[1]= cluster->GetDetInd(1);
694 cind[2]= cluster->GetDetInd(2);
695 cind[3]= cluster->GetDetInd(3);
696 cind[4]= cluster->GetDetInd(4);
697 Float_t tiltangle = AliTOFGeometry::GetAngles(cluster->GetDetInd(1),cluster->GetDetInd(2))/kRaddeg; //tiltangle
699 Float_t cpos[3]; //cluster position
700 Float_t cpos0[3]; //cluster position
701 // fGeom->GetPos(cluster->fdetIndex,cpos);
702 //fGeom->GetPos(cluster->fdetIndex,cpos0);
704 fGeom->GetPos(cind,cpos);
705 fGeom->GetPos(cind,cpos0);
707 Float_t phi = TMath::ATan2(cpos[1],cpos[0]);
708 if(phi<0) phi=2.*TMath::Pi()+phi;
709 // Get the local angle in the sector philoc
710 Float_t phiangle = (Int_t (phi*kRaddeg/20.) + 0.5)*20./kRaddeg;
715 track->GetPxPyPz(dir);
716 dir[0]/=track->GetP();
717 dir[1]/=track->GetP();
718 dir[2]/=track->GetP();
722 Float_t sinphi = TMath::Sin(phiangle);
723 Float_t cosphi = TMath::Cos(phiangle);
724 Float_t sinth = TMath::Sin(tiltangle);
725 Float_t costh = TMath::Cos(tiltangle);
728 temp = cpos[0]*cosphi+cpos[1]*sinphi;
729 cpos[1] = -cpos[0]*sinphi+cpos[1]*cosphi;
731 temp = v0[0]*cosphi+v0[1]*sinphi;
732 v0[1] = -v0[0]*sinphi+v0[1]*cosphi;
735 temp = cpos[0]*costh+cpos[2]*sinth;
736 cpos[2] = -cpos[0]*sinth+cpos[2]*costh;
738 temp = v0[0]*costh+v0[2]*sinth;
739 v0[2] = -v0[0]*sinth+v0[2]*costh;
743 //rotate direction vector
745 temp = dir[0]*cosphi+dir[1]*sinphi;
746 dir[1] = -dir[0]*sinphi+dir[1]*cosphi;
749 temp = dir[0]*costh+dir[2]*sinth;
750 dir[2] = -dir[0]*sinth+dir[2]*costh;
754 Float_t k = (cpos[0]-v0[0])/dir[0];
755 v3[0] = v0[0]+k*dir[0];
756 v3[1] = v0[1]+k*dir[1];
757 v3[2] = v0[2]+k*dir[2];
759 distances[0] = v3[0]-cpos[0];
760 distances[1] = v3[1]-cpos[1];
761 distances[2] = v3[2]-cpos[2];
762 distances[3] = TMath::Sqrt( distances[0]*distances[0]+distances[1]*distances[1]+distances[2]*distances[2]); //distance
763 distances[4] = k; //length
766 // Debuging part of the matching
768 if (track->GetLabel()==cluster->GetLabel(0) ||
769 track->GetLabel()==cluster->GetLabel(1) ||
770 track->GetLabel()==cluster->GetLabel(2) ){
771 TTreeSRedirector& cstream = *fDebugStreamer;
772 Float_t tdc = cluster->GetTDC();
779 "Dist0="<<distances[0]<<
780 "Dist1="<<distances[1]<<
781 "Dist2="<<distances[2]<<
788 //_________________________________________________________________________
789 void AliTOFtrackerMI::GetLikelihood(Float_t dy, Float_t dz, const Double_t *cov, AliTOFtrack * /*track*/, Float_t & py, Float_t &pz) const
792 // get likelihood - track covariance taken
793 // 75 % of gauss with expected sigma
794 // 25 % of gauss with extended sigma
796 Double_t kMaxSigmaY = 0.6; // ~ 90% of TRD tracks
797 Double_t kMaxSigmaZ = 1.2; // ~ 90% of TRD tracks
798 Double_t kMeanSigmaY = 0.25; // mean TRD sigma
799 Double_t kMeanSigmaZ = 0.5; // mean TRD sigma
802 Float_t normwidth, normd, p0,p1;
803 Float_t sigmay = TMath::Max(TMath::Sqrt(TMath::Abs(cov[0])+kMeanSigmaY*kMeanSigmaY),kMaxSigmaY);
804 Float_t sigmaz = TMath::Max(TMath::Sqrt(TMath::Abs(cov[2])+kMeanSigmaZ*kMeanSigmaZ),kMaxSigmaZ);
809 // py calculation - 75% admixture of original sigma - 25% tails
811 normwidth = fDy/sigmay;
813 p0 = 0.5*(1+AliMathBase::ErfFast(normd-normwidth*0.5));
814 p1 = 0.5*(1+AliMathBase::ErfFast(normd+normwidth*0.5));
817 normwidth = fDy/(3.*sigmay);
818 normd = dy/(3.*sigmay);
819 p0 = 0.5*(1+AliMathBase::ErfFast(normd-normwidth*0.5));
820 p1 = 0.5*(1+AliMathBase::ErfFast(normd+normwidth*0.5));
823 // pz calculation - 75% admixture of original sigma - 25% tails
825 normwidth = fDz/sigmaz;
827 p0 = 0.5*(1+AliMathBase::ErfFast(normd-normwidth*0.5));
828 p1 = 0.5*(1+AliMathBase::ErfFast(normd+normwidth*0.5));
831 normwidth = fDz/(3.*sigmaz);
832 normd = dz/(3.*sigmaz);
833 p0 = 0.5*(1+AliMathBase::ErfFast(normd-normwidth*0.5));
834 p1 = 0.5*(1+AliMathBase::ErfFast(normd+normwidth*0.5));
837 //_________________________________________________________________________
839 void AliTOFtrackerMI::FillClusterArray(TObjArray* arr) const
842 // Returns the TOF cluster array
848 for (Int_t i=0; i<fN; ++i) arr->Add(fClusters[i]);