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Small bug fix (which should have no influence online)
[u/mrichter/AliRoot.git] / TOF / AliTOFtrackerMI.cxx
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1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
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 **************************************************************************/
15
16//-----------------------------------------------------------------//
17// //
18// AliTOFtracker Class //
19// Task: Perform association of the ESD tracks to TOF Clusters //
20// and Update ESD track with associated TOF Cluster parameters //
21// //
22//-----------------------------------------------------------------//
23
24#include <Rtypes.h>
25
26#include "TClonesArray.h"
27#include "TTree.h"
28#include "TTreeStream.h"
29
30#include "AliESDEvent.h"
31#include "AliESDtrack.h"
32
33#include "AliTOFRecoParam.h"
34#include "AliTOFReconstructor.h"
35#include "AliTOFcluster.h"
36#include "AliTOFGeometry.h"
37#include "AliTOFtrackerMI.h"
38#include "AliTOFtrack.h"
39#include "AliTOFpidESD.h"
40
41class TGeoManager;
42
43extern TGeoManager *gGeoManager;
44
45ClassImp(AliTOFtrackerMI)
46
47//_____________________________________________________________________________
48AliTOFtrackerMI::AliTOFtrackerMI():
49 fRecoParam(0x0),
50 fGeom(0x0),
51 fPid(0x0),
52 fN(0),
53 fNseeds(0),
54 fNseedsTOF(0),
55 fngoodmatch(0),
56 fnbadmatch(0),
57 fnunmatch(0),
58 fnmatch(0),
59 fR(379.),
60 fTOFHeigth(15.3),
61 fdCut(3.),
62 fDx(1.5),
63 fDy(0),
64 fDz(0),
65 fTracks(new TClonesArray("AliTOFtrack")),
66 fSeeds(new TClonesArray("AliESDtrack")),
67 fDebugStreamer(0x0)
68 {
69 //AliTOFtrackerMI main Ctor
70
71 fDy=AliTOFGeometry::XPad();
72 fDz=AliTOFGeometry::ZPad();
73 fDebugStreamer = new TTreeSRedirector("TOFdebug.root");
74}
75
76//_____________________________________________________________________________
77AliTOFtrackerMI::~AliTOFtrackerMI(){
78 //
79 //
80 //
81 if (fDebugStreamer) {
82 //fDebugStreamer->Close();
83 delete fDebugStreamer;
84 }
85 delete fRecoParam;
86 delete fGeom;
87 delete fPid;
88 if (fTracks){
89 fTracks->Delete();
90 delete fTracks;
91 fTracks=0x0;
92 }
93 if (fSeeds){
94 fSeeds->Delete();
95 delete fSeeds;
96 fSeeds=0x0;
97 }
98}
99
100//_____________________________________________________________________________
101Int_t AliTOFtrackerMI::PropagateBack(AliESDEvent* event) {
102 //
103 // Gets seeds from ESD event and Match with TOF Clusters
104 //
105
106 // initialize RecoParam for current event
107
108 AliInfo("Initializing params for TOF... ");
109
110 fRecoParam = AliTOFReconstructor::GetRecoParam(); // instantiate reco param from STEER...
111
112 if (fRecoParam == 0x0) {
113 AliFatal("No Reco Param found for TOF!!!");
114 }
115 //fRecoParam->Dump();
116 //if(fRecoParam->GetApplyPbPbCuts())fRecoParam=fRecoParam->GetPbPbparam();
117 //fRecoParam->PrintParameters();
118
119 Double_t parPID[2];
120 parPID[0]=fRecoParam->GetTimeResolution();
121 parPID[1]=fRecoParam->GetTimeNSigma();
122 fPid=new AliTOFpidESD(parPID);
123
124 //Initialise some counters
125
126 fNseeds=0;
127 fNseedsTOF=0;
128 fngoodmatch=0;
129 fnbadmatch=0;
130 fnunmatch=0;
131 fnmatch=0;
132
133 Int_t ntrk=event->GetNumberOfTracks();
134 fNseeds = ntrk;
135 TClonesArray &aESDTrack = *fSeeds;
136
137
138 //Load ESD tracks into a local Array of ESD Seeds
139
140 for (Int_t i=0; i<fNseeds; i++) {
141 AliESDtrack *t=event->GetTrack(i);
142 new(aESDTrack[i]) AliESDtrack(*t);
143 }
144
145 //Prepare ESD tracks candidates for TOF Matching
146 CollectESD();
147
148 //First Step with Strict Matching Criterion
149 //MatchTracks(kFALSE);
150
151 //Second Step with Looser Matching Criterion
152 //MatchTracks(kTRUE);
153 MatchTracksMI(kFALSE); // assign track to clusters
154 MatchTracksMI(kTRUE); // assign clusters to esd
155
156 Info("PropagateBack","Number of matched tracks: %d",fnmatch);
157 Info("PropagateBack","Number of good matched tracks: %d",fngoodmatch);
158 Info("PropagateBack","Number of bad matched tracks: %d",fnbadmatch);
159
160 //Update the matched ESD tracks
161
162 for (Int_t i=0; i<ntrk; i++) {
163 AliESDtrack *t=event->GetTrack(i);
164 AliESDtrack *seed =(AliESDtrack*)fSeeds->UncheckedAt(i);
165
166 if ( (seed->GetStatus()&AliESDtrack::kTOFin)!=0 ) {
167 t->SetStatus(AliESDtrack::kTOFin);
168 //if(seed->GetTOFsignal()>0){
169 if ( (seed->GetStatus()&AliESDtrack::kTOFout)!=0 ) {
170 t->SetTOFsignal(seed->GetTOFsignal());
171 t->SetTOFcluster(seed->GetTOFcluster());
172 Int_t tlab[3];
173 seed->GetTOFLabel(tlab);
174 t->SetTOFLabel(tlab);
175 AliTOFtrack *track = new AliTOFtrack(*seed);
176 Float_t info[10];
177 Double_t times[10];
178 seed->GetTOFInfo(info);
179 seed->GetIntegratedTimes(times);
180 t->UpdateTrackParams(track,AliESDtrack::kTOFout);
181 t->SetIntegratedLength(seed->GetIntegratedLength());
182 t->SetIntegratedTimes(times);
183 t->SetTOFsignalToT(seed->GetTOFsignalToT());
184 t->SetTOFCalChannel(seed->GetTOFCalChannel());
185 //
186 t->SetTOFInfo(info);
187 delete track;
188 }
189 }
190 }
191
192
193 //Make TOF PID
194 fPid->MakePID(event);
195
196 fSeeds->Clear();
197 fTracks->Clear();
198 return 0;
199
200}
201//_________________________________________________________________________
202void AliTOFtrackerMI::CollectESD() {
203 //prepare the set of ESD tracks to be matched to clusters in TOF
204
205 TClonesArray &aTOFTrack = *fTracks;
206 Int_t c0=0;
207 Int_t c1=0;
208 for (Int_t i=0; i<fNseeds; i++) {
209
210 AliESDtrack *t =(AliESDtrack*)fSeeds->UncheckedAt(i);
211 if ((t->GetStatus()&AliESDtrack::kTPCout)==0)continue;
212
213 AliTOFtrack *track = new AliTOFtrack(*t); // New
214 Float_t x = (Float_t)track->GetX(); //New
215
216 // TRD good tracks, already propagated at 371 cm
217 if ( ( (t->GetStatus()&AliESDtrack::kTRDout)!=0 ) &&
218 ( x >= AliTOFGeometry::Rmin() ) ) {
219 if ( track->PropagateToInnerTOF() ) {
220 track->SetSeedIndex(i);
221 t->UpdateTrackParams(track,AliESDtrack::kTOFin);
222 new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
223 fNseedsTOF++;
224 c0++;
225 delete track;
226 }
227 }
228
229 // Propagate the rest of TPCbp
230 else {
231 if ( track->PropagateToInnerTOF() ) { // temporary solution
232 track->SetSeedIndex(i);
233 t->UpdateTrackParams(track,AliESDtrack::kTOFin);
234 new(aTOFTrack[fNseedsTOF]) AliTOFtrack(*track);
235 fNseedsTOF++;
236 c1++;
237 }
238 delete track;
239 }
240 }
241 //
242 //
243 printf("TRD\tOn\t%d\tOff\t%d\n",c0,c1);
244
245 // Sort according uncertainties on track position
246 fTracks->Sort();
247
248}
249
250
251
252
253
254
255
256//
257//
258//_________________________________________________________________________
259void AliTOFtrackerMI::MatchTracks( Bool_t /*mLastStep*/){
260 return;
261}
262//
263//
264//_________________________________________________________________________
265void AliTOFtrackerMI::MatchTracksMI(Bool_t mLastStep){
266
267 //Match ESD tracks to clusters in TOF
268 const Float_t kTofOffset = 26; // time offset
269 const Float_t kMinQuality = -6.; // minimal quality
270 const Float_t kMaxQualityD = 1.; // max delta quality if cluster used
271 const Float_t kForbiddenR = 0.1; // minimal PID according TPC
272
273 static const Double_t kMasses[]={
274 0.000511, 0.105658, 0.139570, 0.493677, 0.938272, 1.875613
275 };
276
277 Int_t nSteps=(Int_t)(fTOFHeigth/0.1);
278
279 //AliTOFcalib *calib = new AliTOFcalib(); // AdC
280
281 //PH Arrays (moved outside of the loop)
282 Float_t * trackPos[4];
283 for (Int_t ii=0; ii<4; ii++) trackPos[ii] = new Float_t[nSteps];
284 Int_t * clind = new Int_t[fN];
285
286 // Some init
287
288 Int_t index[1000];
289 Float_t quality[1000];
290 Float_t dist3D[1000][6];
291 Double_t times[1000][6];
292 Float_t mintimedist[1000];
293 Float_t likelihood[1000];
294 Float_t length[1000];
295 AliTOFcluster *clusters[1000];
296 Double_t tpcpid[5];
297 dist3D[0][0]=1;
298
299 for (Int_t i=0; i<fNseedsTOF; i++) {
300
301 AliTOFtrack *track =(AliTOFtrack*)fTracks->UncheckedAt(i);
302 AliESDtrack *t =(AliESDtrack*)fSeeds->UncheckedAt(track->GetSeedIndex());
303 Bool_t hasTime = ( (t->GetStatus()& AliESDtrack::kTIME)>0) ? kTRUE:kFALSE; // did we integrate time
304 Float_t trdquality = t->GetTRDQuality();
305 //
306 // Normalize tpc pid
307 //
308 t->GetTPCpid(tpcpid);
309 Double_t sumpid=0;
310 for (Int_t ipid=0;ipid<5;ipid++){
311 sumpid+=tpcpid[ipid];
312 }
313 for (Int_t ipid=0;ipid<5;ipid++){
314 if (sumpid>0) tpcpid[ipid]/=sumpid;
315 else{
316 tpcpid[ipid]=0.2;
317 }
318 }
319
320 if (trdquality<0) continue; // no chance
321 //
322 AliTOFtrack *trackTOFin =new AliTOFtrack(*track);
323 //
324 //propagat track to the middle of TOF
325 //
326 Float_t xs = 379.2; // should be defined in the TOF geometry
327 Double_t ymax=xs*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());
328 Bool_t skip=kFALSE;
329 Double_t ysect=trackTOFin->GetYat(xs,skip);
330 if (skip){
331 xs = 373.;
332 ymax=xs*TMath::Tan(0.5*AliTOFGeometry::GetAlpha());
333 ysect=trackTOFin->GetYat(xs,skip);
334 }
335 if (ysect > ymax) {
336 if (!trackTOFin->Rotate(AliTOFGeometry::GetAlpha())) {
337 continue;
338 }
339 } else if (ysect <-ymax) {
340 if (!trackTOFin->Rotate(-AliTOFGeometry::GetAlpha())) {
341 continue;
342 }
343 }
344 if(!trackTOFin->PropagateTo(xs)) {
345 continue;
346 }
347 //
348 // Determine a window around the track
349 //
350 Double_t x,par[5];
351 trackTOFin->GetExternalParameters(x,par);
352 Double_t cov[15];
353 trackTOFin->GetExternalCovariance(cov);
354 Float_t scalefact=3.;
355 Double_t dphi=
356 scalefact*
357 ((5*TMath::Sqrt(cov[0]) + 3.*fDy + 10.*TMath::Abs(par[2]))/fR);
358 Double_t dz=
359 scalefact*
360 (5*TMath::Sqrt(cov[2]) + 3.*fDz + 10.*TMath::Abs(par[3]));
361
362 Double_t phi=TMath::ATan2(par[0],x) + trackTOFin->GetAlpha();
363 if (phi<-TMath::Pi())phi+=2*TMath::Pi();
364 if (phi>=TMath::Pi())phi-=2*TMath::Pi();
365 Double_t z=par[1];
366
367 Int_t nc =0;
368 Int_t nfound =0;
369 // find the clusters in the window of the track
370
371 for (Int_t k=FindClusterIndex(z-dz); k<fN; k++) {
372 AliTOFcluster *c=fClusters[k];
373 if (c->GetZ() > z+dz) break;
374 // if (c->IsUsed()) continue;
375
376 Double_t dph=TMath::Abs(c->GetPhi()-phi);
377 if (dph>TMath::Pi()) dph-=2.*TMath::Pi();
378 if (TMath::Abs(dph)>dphi) continue;
379
380 clind[nc] = k;
381 nc++;
382 }
383
384 //
385 // select close clusters
386 //
387 Double_t mom=t->GetP();
388 // Bool_t dump = kTRUE;
389 for (Int_t icl=0; icl<nc; icl++){
390 Float_t distances[5];
391 if (nfound>=1000) break;
392 index[nfound]=clind[icl];
393 AliTOFcluster *cluster = fClusters[clind[icl]];
394 GetLinearDistances(trackTOFin, cluster, distances);
395 dist3D[nfound][0] = distances[4];
396 dist3D[nfound][1] = distances[1];
397 dist3D[nfound][2] = distances[2];
398 // cut on distance
399 if (TMath::Abs(dist3D[nfound][1])>20 || TMath::Abs(dist3D[nfound][2])>20) continue;
400 //
401 GetLikelihood(distances[1],distances[2],cov,trackTOFin, dist3D[nfound][3], dist3D[nfound][4]);
402 //
403 // cut on likelihood
404 if (dist3D[nfound][3]*dist3D[nfound][4]<0.00000000000001) continue; // log likelihood
405 if (TMath::Log(dist3D[nfound][3]*dist3D[nfound][4])<-9) continue; // log likelihood
406 //
407 clusters[nfound] = cluster;
408 //
409 //length and TOF updates
410 trackTOFin->GetIntegratedTimes(times[nfound]);
411 length[nfound] = trackTOFin->GetIntegratedLength();
412 length[nfound]+=distances[4];
413 mintimedist[nfound]=1000;
414 Double_t tof2=AliTOFGeometry::TdcBinWidth()*cluster->GetTDC()+kTofOffset; // in ps
415 // Float_t tgamma = TMath::Sqrt(cluster->GetR()*cluster->GetR()+cluster->GetZ()*cluster->GetZ())/0.03; //time for "primary" gamma
416 //if (trackTOFin->GetPt()<0.7 && TMath::Abs(tgamma-tof2)<350) continue; // gamma conversion candidate - TEMPORARY
417 for(Int_t j=0;j<=5;j++){
418 Double_t mass=kMasses[j];
419 times[nfound][j]+=distances[4]/3e-2*TMath::Sqrt(mom*mom+mass*mass)/mom; // add time distance
420 if ( TMath::Abs(times[nfound][j]-tof2)<mintimedist[nfound] && tpcpid[j]>kForbiddenR){
421 mintimedist[nfound]=TMath::Abs(times[nfound][j]-tof2);
422 }
423 }
424 //
425 Float_t liketime = TMath::Exp(-mintimedist[nfound]/90.)+0.25*TMath::Exp(-mintimedist[nfound]/180.);
426 if (!hasTime) liketime=0.2;
427 likelihood[nfound] = TMath::Log(dist3D[nfound][3]*dist3D[nfound][4]*liketime);
428
429 if (TMath::Log(dist3D[nfound][3]*dist3D[nfound][4])<-1){
430 if (likelihood[nfound]<-9.) continue;
431 }
432 //
433 nfound++;
434 }
435 if (nfound == 0 ) {
436 fnunmatch++;
437 delete trackTOFin;
438 continue;
439 }
440 //
441 //choose the best cluster
442 //
443 //Float_t quality[1000];
444 //Int_t index[1000];
445 for (Int_t kk=0; kk<1000; kk++) quality[kk]=0;
446 //
447 AliTOFcluster * cgold=0;
448 Int_t igold =-1;
449 for (Int_t icl=0;icl<nfound;icl++){
450 quality[icl] = dist3D[icl][3]*dist3D[icl][4];
451 }
452 TMath::Sort(nfound,quality,index,kTRUE);
453 igold = index[0];
454 cgold = clusters[igold];
455 if (nfound>1 &&likelihood[index[1]]>likelihood[index[0]]){
456 if ( quality[index[0]]<quality[index[1]]+0.5){
457 igold = index[1];
458 cgold = clusters[igold];
459 }
460 }
461 //
462 //
463 Float_t qualityGold = TMath::Log(0.0000001+(quality[igold]*(0.1+TMath::Exp(-mintimedist[igold]/80.))*(0.2+trdquality)));
464 if (!mLastStep){
465 if (cgold->GetQuality()<qualityGold) cgold->SetQuality(qualityGold);
466 continue;
467 }
468 //
469 if (mLastStep){
470 //signed better cluster
471 if (cgold->GetQuality()>qualityGold+kMaxQualityD) continue;
472 if (2.*qualityGold-cgold->GetQuality()<kMinQuality) continue;
473 }
474
475 Int_t inonfake=-1;
476
477 for (Int_t icl=0;icl<nfound;icl++){
478 if (
479 (clusters[index[icl]]->GetLabel(0)==TMath::Abs(trackTOFin->GetLabel()))
480 ||
481 (clusters[index[icl]]->GetLabel(1)==TMath::Abs(trackTOFin->GetLabel()))
482 ||
483 (clusters[index[icl]]->GetLabel(2)==TMath::Abs(trackTOFin->GetLabel()))
484 ) {
485 inonfake = icl;
486 break;
487 }
488 }
489 fnmatch++;;
490 if (inonfake==0) fngoodmatch++;
491 else{
492 fnbadmatch++;
493 }
494
495 Int_t tlab[3];
496 tlab[0]=cgold->GetLabel(0);
497 tlab[1]=cgold->GetLabel(1);
498 tlab[2]=cgold->GetLabel(2);
499 // Double_t tof2=25.*cgold->GetTDC()-350; // in ps
500 Double_t tof2=AliTOFGeometry::TdcBinWidth()*cgold->GetTDC()+kTofOffset; // in ps
501 Float_t tgamma = TMath::Sqrt(cgold->GetR()*cgold->GetR()+cgold->GetZ()*cgold->GetZ())/0.03;
502 Float_t info[11]={dist3D[igold][0],dist3D[igold][1],dist3D[igold][2],dist3D[igold][3],dist3D[igold][4],mintimedist[igold],
503 -1,tgamma, qualityGold,cgold->GetQuality(),0};
504 // GetLinearDistances(trackTOFin,cgold,&info[6]);
505 if (inonfake>=0){
506 info[6] = inonfake;
507 // info[7] = mintimedist[index[inonfake]];
508 }
509 //
510 // Store quantities to be used for TOF Calibration
511 Float_t tToT=cgold->GetToT(); // in ps
512 t->SetTOFsignalToT(tToT);
513 Int_t ind[5];
514 ind[0]=cgold->GetDetInd(0);
515 ind[1]=cgold->GetDetInd(1);
516 ind[2]=cgold->GetDetInd(2);
517 ind[3]=cgold->GetDetInd(3);
518 ind[4]=cgold->GetDetInd(4);
519 Int_t calindex = AliTOFGeometry::GetIndex(ind);
520 t->SetTOFCalChannel(calindex);
521
522 t->SetTOFInfo(info);
523 t->SetTOFsignal(tof2);
524 t->SetTOFcluster(cgold->GetIndex());
525
526 AliDebug(2, Form("%7i %7i %10i %10i %10i %10i %7i",
527 i,
528 fnmatch-1,
529 TMath::Abs(trackTOFin->GetLabel()),
530 tlab[0], tlab[1], tlab[2],
531 igold)); // AdC
532
533 AliTOFtrack *trackTOFout = new AliTOFtrack(*t);
534 trackTOFout->PropagateTo(379.);
535
536 // Fill the track residual histograms.
537 FillResiduals(trackTOFout,cgold,kFALSE);
538
539 t->UpdateTrackParams(trackTOFout,AliESDtrack::kTOFout);
540 t->SetIntegratedLength(length[igold]);
541 t->SetIntegratedTimes(times[igold]);
542 t->SetTOFLabel(tlab);
543 //
544 delete trackTOFin;
545 delete trackTOFout;
546 //
547 }
548 //
549 //
550 //
551 for (Int_t ii=0; ii<4; ii++) delete [] trackPos[ii];
552 delete [] clind;
553 //delete calib; // AdC
554}
555//_________________________________________________________________________
556
557Int_t AliTOFtrackerMI::LoadClusters(TTree *cTree) {
558 //--------------------------------------------------------------------
559 //This function loads the TOF clusters
560 //--------------------------------------------------------------------
561
562 TBranch *branch=cTree->GetBranch("TOF");
563 if (!branch) {
564 AliError("can't get the branch with the TOF clusters !");
565 return 1;
566 }
567
568 static TClonesArray dummy("AliTOFcluster",10000);
569 dummy.Clear();
570 TClonesArray *clusters=&dummy;
571 branch->SetAddress(&clusters);
572
573 cTree->GetEvent(0);
574 Int_t nc=clusters->GetEntriesFast();
575 AliInfo(Form("Number of clusters: %d",nc));
576
577 for (Int_t i=0; i<nc; i++) {
578 AliTOFcluster *c=(AliTOFcluster*)clusters->UncheckedAt(i);
579
580 fClusters[i]=new AliTOFcluster(*c); fN++;
581
582 //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)));
583 //AliInfo(Form("%i %f",i, fClusters[i]->GetZ()));
584 }
585
586 //AliInfo(Form("Number of clusters: %d",fN));
587
588 return 0;
589}
590//_________________________________________________________________________
591void AliTOFtrackerMI::UnloadClusters() {
592 //--------------------------------------------------------------------
593 //This function unloads TOF clusters
594 //--------------------------------------------------------------------
595 for (Int_t i=0; i<fN; i++) {
596 delete fClusters[i];
597 fClusters[i] = 0x0;
598 }
599 fN=0;
600}
601
602
603
604
605//_________________________________________________________________________
606Int_t AliTOFtrackerMI::InsertCluster(AliTOFcluster *c) {
607 //--------------------------------------------------------------------
608 //This function adds a cluster to the array of clusters sorted in Z
609 //--------------------------------------------------------------------
610 if (fN==kMaxCluster) {
611 AliError("Too many clusters !");
612 return 1;
613 }
614
615 if (fN==0) {fClusters[fN++]=c; return 0;}
616 Int_t i=FindClusterIndex(c->GetZ());
617 memmove(fClusters+i+1 ,fClusters+i,(fN-i)*sizeof(AliTOFcluster*));
618 fClusters[i]=c; fN++;
619
620 return 0;
621}
622
623//_________________________________________________________________________
624Int_t AliTOFtrackerMI::FindClusterIndex(Double_t z) const {
625 //--------------------------------------------------------------------
626 // This function returns the index of the nearest cluster
627 //--------------------------------------------------------------------
628 if (fN==0) return 0;
629 if (z <= fClusters[0]->GetZ()) return 0;
630 if (z > fClusters[fN-1]->GetZ()) return fN;
631 Int_t b=0, e=fN-1, m=(b+e)/2;
632 for (; b<e; m=(b+e)/2) {
633 if (z > fClusters[m]->GetZ()) b=m+1;
634 else e=m;
635 }
636 return m;
637}
638
639
640
641Float_t AliTOFtrackerMI::GetLinearDistances(AliTOFtrack * track, AliTOFcluster *cluster, Float_t distances[5])
642{
643 //
644 // calclates distance between cluster and track
645 // use linear aproximation
646 //
647 const Float_t kRaddeg = 180/3.14159265358979312;
648 //
649 // Float_t tiltangle = fGeom->GetAngles(cluster->fdetIndex[1],cluster->fdetIndex[2])/kRaddeg; //tiltangle
650 Int_t cind[5];
651 cind[0]= cluster->GetDetInd(0);
652 cind[1]= cluster->GetDetInd(1);
653 cind[2]= cluster->GetDetInd(2);
654 cind[3]= cluster->GetDetInd(3);
655 cind[4]= cluster->GetDetInd(4);
656 Float_t tiltangle = AliTOFGeometry::GetAngles(cluster->GetDetInd(1),cluster->GetDetInd(2))/kRaddeg; //tiltangle
657
658 Float_t cpos[3]; //cluster position
659 Float_t cpos0[3]; //cluster position
660 // fGeom->GetPos(cluster->fdetIndex,cpos);
661 //fGeom->GetPos(cluster->fdetIndex,cpos0);
662 //
663 fGeom->GetPos(cind,cpos);
664 fGeom->GetPos(cind,cpos0);
665
666 Float_t phi = TMath::ATan2(cpos[1],cpos[0]);
667 if(phi<0) phi=2.*TMath::Pi()+phi;
668 // Get the local angle in the sector philoc
669 Float_t phiangle = (Int_t (phi*kRaddeg/20.) + 0.5)*20./kRaddeg;
670 //
671 Double_t v0[3];
672 Double_t dir[3];
673 track->GetXYZ(v0);
674 track->GetPxPyPz(dir);
675 dir[0]/=track->GetP();
676 dir[1]/=track->GetP();
677 dir[2]/=track->GetP();
678 //
679 //
680 //rotate 0
681 Float_t sinphi = TMath::Sin(phiangle);
682 Float_t cosphi = TMath::Cos(phiangle);
683 Float_t sinth = TMath::Sin(tiltangle);
684 Float_t costh = TMath::Cos(tiltangle);
685 //
686 Float_t temp;
687 temp = cpos[0]*cosphi+cpos[1]*sinphi;
688 cpos[1] = -cpos[0]*sinphi+cpos[1]*cosphi;
689 cpos[0] = temp;
690 temp = v0[0]*cosphi+v0[1]*sinphi;
691 v0[1] = -v0[0]*sinphi+v0[1]*cosphi;
692 v0[0] = temp;
693 //
694 temp = cpos[0]*costh+cpos[2]*sinth;
695 cpos[2] = -cpos[0]*sinth+cpos[2]*costh;
696 cpos[0] = temp;
697 temp = v0[0]*costh+v0[2]*sinth;
698 v0[2] = -v0[0]*sinth+v0[2]*costh;
699 v0[0] = temp;
700 //
701 //
702 //rotate direction vector
703 //
704 temp = dir[0]*cosphi+dir[1]*sinphi;
705 dir[1] = -dir[0]*sinphi+dir[1]*cosphi;
706 dir[0] = temp;
707 //
708 temp = dir[0]*costh+dir[2]*sinth;
709 dir[2] = -dir[0]*sinth+dir[2]*costh;
710 dir[0] = temp;
711 //
712 Float_t v3[3];
713 Float_t k = (cpos[0]-v0[0])/dir[0];
714 v3[0] = v0[0]+k*dir[0];
715 v3[1] = v0[1]+k*dir[1];
716 v3[2] = v0[2]+k*dir[2];
717 //
718 distances[0] = v3[0]-cpos[0];
719 distances[1] = v3[1]-cpos[1];
720 distances[2] = v3[2]-cpos[2];
721 distances[3] = TMath::Sqrt( distances[0]*distances[0]+distances[1]*distances[1]+distances[2]*distances[2]); //distance
722 distances[4] = k; //length
723
724 //
725 // Debuging part of the matching
726 //
727 if (track->GetLabel()==cluster->GetLabel(0) ||track->GetLabel()==cluster->GetLabel(1) ){
728 TTreeSRedirector& cstream = *fDebugStreamer;
729 Float_t tdc = cluster->GetTDC();
730 cstream<<"Tracks"<<
731 "TOF.="<<track<<
732 "Cx="<<cpos0[0]<<
733 "Cy="<<cpos0[1]<<
734 "Cz="<<cpos0[2]<<
735 "Dist="<<k<<
736 "Dist0="<<distances[0]<<
737 "Dist1="<<distances[1]<<
738 "Dist2="<<distances[2]<<
739 "TDC="<<tdc<<
740 "\n";
741 }
742 return distances[3];
743}
744
745
746
747void AliTOFtrackerMI::GetLikelihood(Float_t dy, Float_t dz, const Double_t *cov, AliTOFtrack * /*track*/, Float_t & py, Float_t &pz)
748{
749 //
750 // get likelihood - track covariance taken
751 // 75 % of gauss with expected sigma
752 // 25 % of gauss with extended sigma
753
754 Double_t kMaxSigmaY = 0.6; // ~ 90% of TRD tracks
755 Double_t kMaxSigmaZ = 1.2; // ~ 90% of TRD tracks
756 Double_t kMeanSigmaY = 0.25; // mean TRD sigma
757 Double_t kMeanSigmaZ = 0.5; // mean TRD sigma
758
759
760 Float_t normwidth, normd, p0,p1;
761 Float_t sigmay = TMath::Max(TMath::Sqrt(cov[0]+kMeanSigmaY*kMeanSigmaY),kMaxSigmaY);
762 Float_t sigmaz = TMath::Max(TMath::Sqrt(cov[2]+kMeanSigmaZ*kMeanSigmaZ),kMaxSigmaZ);
763
764 py=0;
765 pz=0;
766 //
767 // py calculation - 75% admixture of original sigma - 25% tails
768 //
769 normwidth = fDy/sigmay;
770 normd = dy/sigmay;
771 p0 = 0.5*(1+TMath::Erf(normd-normwidth*0.5));
772 p1 = 0.5*(1+TMath::Erf(normd+normwidth*0.5));
773 py+= 0.75*(p1-p0);
774 //
775 normwidth = fDy/(3.*sigmay);
776 normd = dy/(3.*sigmay);
777 p0 = 0.5*(1+TMath::Erf(normd-normwidth*0.5));
778 p1 = 0.5*(1+TMath::Erf(normd+normwidth*0.5));
779 py+= 0.25*(p1-p0);
780 //
781 // pz calculation - 75% admixture of original sigma - 25% tails
782 //
783 normwidth = fDz/sigmaz;
784 normd = dz/sigmaz;
785 p0 = 0.5*(1+TMath::Erf(normd-normwidth*0.5));
786 p1 = 0.5*(1+TMath::Erf(normd+normwidth*0.5));
787 pz+= 0.75*(p1-p0);
788 //
789 normwidth = fDz/(3.*sigmaz);
790 normd = dz/(3.*sigmaz);
791 p0 = 0.5*(1+TMath::Erf(normd-normwidth*0.5));
792 p1 = 0.5*(1+TMath::Erf(normd+normwidth*0.5));
793 pz+= 0.25*(p1-p0);
794}
795//_________________________________________________________________________
796
797void AliTOFtrackerMI::FillClusterArray(TObjArray* arr) const
798{
799 //
800 // Returns the TOF cluster array
801 //
802
803 if (fN==0)
804 arr = 0x0;
805 else
806 for (Int_t i=0; i<fN; ++i) arr->Add(fClusters[i]);
807
808}