AliTPCTransform.h - removing warning visible in
[u/mrichter/AliRoot.git] / TOF / AliTOFT0.cxx
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 /* $Id$ */
17
18 //_________________________________________________________________________
19 //
20 // This is a TTask that made the calculation of the Time zero using TOF.
21 // Description: The algorithm used to calculate the time zero of
22 // interaction using TOF detector is the following.
23 // We select in the MonteCarlo some primary particles - or tracks in
24 // the following - that strike the TOF detector (the larger part are
25 // pions, kaons or protons).
26 // We choose a set of 10 selected tracks, for each track You have the
27 // length of the track when the TOF is reached (a standard TOF hit
28 // does not contain this additional information, this is the reason
29 // why we implemented a new time zero dedicated TOF hit class
30 // AliTOFhitT0; in order to store this type of hit You have to use the
31 // AliTOFv4T0 as TOF class in Your Config.C. In AliTOFv4T0 the
32 // StepManager was modified in order to fill the TOF hit branch with
33 // this type of hits; in fact the AliTOF::AddT0Hit is called rather
34 // that the usual AliTOF::AddHit), the momentum at generation (from
35 // TreeK) and the time of flight given by the TOF detector.
36 // (Observe that the ctor of the AliTOF class, when the AliTOFv4T0
37 // class is used, is called with the "tzero" option: it is in order
38 // create the fHits TClonesArray filled with AliTOFhitT0 objects,
39 // rather than with normal AliTOFhit)
40 // Then Momentum and time of flight for each track are smeared
41 // according to known experimental resolution (all sources of error
42 // have been token into account).
43 // Let consider now only one set of 10 tracks (the algorithm is the
44 // same for all sets).
45 // Assuming the (mass) hypothesis that each track can be AUT a pion,
46 // AUT a kaon, AUT a proton, we consider all the 3 at 10 possible
47 // cases.
48 // For each track in each (mass) configuration
49 // (a configuration can be
50 // e.g. pion/pion/kaon/proton/pion/proton/kaon/kaon/pion/pion)
51 // we calculate the time zero (we know in fact the velocity of the
52 // track after the assumption about its mass, the time of flight given
53 // by the TOF, and the corresponding path travelled till the TOF
54 // detector). Then for each mass configuration we have 10 time zero
55 // and we can calculate the ChiSquare for the current configuration
56 // using the weighted mean over all 10 time zero.
57 // We call the best assignment the mass configuration that gives the
58 // minimum value of the ChiSquare.
59 // We plot the weighted mean over all 10 time zero for the best
60 // assignment, the ChiSquare for the best assignment and the
61 // corresponding confidence level.
62 // The strong assumption is the MC selection of primary particles. It
63 // will be introduced in the future also some more realistic
64 // simulation about this point.
65 //
66 // Use case:
67 // root [0] AliTOFT0 * tzero = new AliTOFT0("galice.root")
68 // Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
69 // root [1] tzero->ExecuteTask()
70 // root [2] tzero->ExecuteTask("tim")
71 //             // available parameters:
72 //             tim - print benchmarking information
73 //             all - print usefull informations about the number of
74 //                   misidentified tracks and a comparison about the
75 //                   true configuration (known from MC) and the best
76 //                   assignment
77 //
78 //-- Author: F. Pierella
79 //
80 //_________________________________________________________________________
81
82 #include <TCanvas.h>
83 #include <TClonesArray.h>
84 #include <TFile.h>
85 //#include <TFolder.h>
86 #include <TFrame.h>
87 #include <TH1.h>
88 #include <TParticle.h>
89 #include <TBenchmark.h>
90 #include <TTask.h>
91 #include <TTree.h>
92 #include <TRandom.h>
93 #include <TROOT.h>
94
95 #include "AliMC.h"
96 #include "AliRun.h"
97
98 #include "AliTOFhitT0.h"
99 #include "AliTOFT0.h"
100 #include "AliTOF.h"
101
102 extern TROOT *gROOT;
103 extern TRandom *gRandom;
104 extern TBenchmark *gBenchmark;
105
106 extern AliRun *gAlice;
107
108 ClassImp(AliTOFT0)
109
110 //____________________________________________________________________________ 
111 AliTOFT0::AliTOFT0():
112   TTask("AliTOFT0",""),
113   fNevents(0),
114   fTimeResolution(0),
115   fLowerMomBound(0),
116   fUpperMomBound(0),
117   fT0File(""),
118   fHeadersFile("")
119 {
120   // ctor
121 }
122            
123 //____________________________________________________________________________ 
124 AliTOFT0::AliTOFT0(char* headerFile, Int_t nEvents):
125   TTask("AliTOFT0",""), 
126   fNevents(nEvents),
127   fTimeResolution(1.2e-10),
128   fLowerMomBound(1.5),
129   fUpperMomBound(2.),
130   fT0File(""),
131   fHeadersFile(headerFile)
132 {
133   //
134   //
135   //
136
137   //fNevents=nEvents ; // Number of events for which calculate the T0, 
138                      // default 0: it means all evens in current file
139   //fLowerMomBound=1.5; // [GeV/c] default value
140   //fUpperMomBound=2. ; // [GeV/c] default value
141   //fTimeResolution   = 1.2e-10; // 120 ps by default   
142   //fHeadersFile = headerFile ;
143
144   TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
145
146   //File was not opened yet
147   if(file == 0){
148     if(fHeadersFile.Contains("rfio"))
149       file =    TFile::Open(fHeadersFile,"update") ;
150     else
151       file = new TFile(fHeadersFile.Data(),"update") ;
152     gAlice = (AliRun *) file->Get("gAlice") ;
153   }
154
155   // add Task to //root/Tasks folder
156   TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ; 
157   roottasks->Add(this) ; 
158 }
159
160 //____________________________________________________________________________ 
161 AliTOFT0::AliTOFT0(const AliTOFT0 & tzero):
162   TTask("AliTOFT0",""),
163   fNevents(0),
164   fTimeResolution(0),
165   fLowerMomBound(0),
166   fUpperMomBound(0),
167   fT0File(""),
168   fHeadersFile("")
169 {
170   // copy ctr
171
172 ( (AliTOFT0 &)tzero ).Copy(*this);
173 }
174
175 //____________________________________________________________________________ 
176   AliTOFT0::~AliTOFT0()
177 {
178   // dtor
179 }
180
181 //____________________________________________________________________________
182 void AliTOFT0::Exec(Option_t *option) 
183
184   //
185   // calculate T0 distribution for all events using chisquare 
186   //
187   Int_t ngood=0;
188   Int_t nmisidentified=0;
189   Int_t nmisidentified0=0;
190   Int_t nmisidentified1=0;
191   Int_t nmisidentified2=0;
192   Int_t nmisidentified3=0;
193   Int_t nmisidentified4=0;
194   Int_t nmisidentified5=0;
195   Int_t nmisidentified6=0;
196   Int_t nmisidentified7=0;
197   Int_t nmisidentified8=0;
198   Int_t nmisidentified9=0;
199   Int_t ipartold = -1;
200   Int_t ipart;
201   Int_t selected=0;
202   Int_t istop=0;
203   Float_t timeresolutioninns=fTimeResolution*(1.e+9); // convert in [ns]
204   const Int_t kUPDATE = 5; // for visual option
205   Int_t itimes=0;
206   TCanvas* c1=0;
207   TCanvas* c2=0;
208   TCanvas* c3=0;
209
210   if(strstr(option,"visual")){
211     // Create a new canvas.
212     //c1 = new TCanvas("c1","Dynamic Visual Filling of time zero histo",10,10,500,500);
213     c1 = new TCanvas("c1","Dynamic Visual Filling of time zero histo",10,10,370,370);
214     c1->SetFillColor(35);
215     c1->GetFrame()->SetFillColor(21);
216     c1->GetFrame()->SetBorderSize(6);
217     c1->GetFrame()->SetBorderMode(-1);
218
219     //c2 = new TCanvas("c2","Dynamic Visual Filling of chisquare histo",550,10,500,500);
220     c2 = new TCanvas("c2","Dynamic Visual Filling of chisquare histo",380,10,370,370);
221     c2->SetFillColor(35);
222     c2->GetFrame()->SetFillColor(21);
223     c2->GetFrame()->SetBorderSize(6);
224     c2->GetFrame()->SetBorderMode(-1);
225
226     //c3 = new TCanvas("c3","Dynamic Visual Filling of confidence level histo",280,550,500,500);
227     c3 = new TCanvas("c3","Dynamic Visual Filling of confidence level histo",760,10,370,370);
228     c3->SetFillColor(35);
229     c3->GetFrame()->SetFillColor(21);
230     c3->GetFrame()->SetBorderSize(6);
231     c3->GetFrame()->SetBorderMode(-1);
232   }
233
234   if(strstr(option,"tim") || strstr(option,"all"))
235     gBenchmark->Start("TOFT0");
236
237   TH1F *htzerobest= new TH1F("htzerobest","T0 for best assignment",200,-1.,1.);
238   TH1F* hchibest  = new TH1F("hchibest","ChiSquare Min Distribution",80,0.,40.);
239   TH1F* hchibestconflevel  = new TH1F("hchibestconflevel","ChiSquare Min Confidence Level",10,0.,1.);
240
241   // setting histo colors
242   if(strstr(option,"visual")){
243     htzerobest->SetFillColor(48);
244     hchibest->SetFillColor(50);
245     hchibestconflevel->SetFillColor(52);
246   }
247
248   Int_t   assparticle[10]={3,3,3,3,3,3,3,3,3,3};
249   Int_t   truparticle[10]={3,3,3,3,3,3,3,3,3,3};
250   Float_t t0best=999.;
251   Float_t timeofflight[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
252   Float_t momentum[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
253   Float_t timezero[10];
254   Float_t weightedtimezero[10];
255   Float_t beta[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
256   Float_t sqMomError[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
257   Float_t sqTrackError[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
258   Float_t massarray[3]={0.13957,0.493677,0.9382723};
259   Float_t dummychisquare=0.;
260   Float_t chisquare=999.;
261   Float_t tracktoflen[10]={0.,0.,0.,0.,0.,0.,0.,0.,0.,0.};
262
263   AliTOF *detTOF = (AliTOF *) gAlice->GetDetector ("TOF");
264
265   if (!detTOF) {
266     Error("AliTOFT0","TOF not found");
267     return;
268   }
269
270   if(strstr(option,"all")){
271     AliInfo(Form("Selecting primary tracks with momentum between %d GeV/c and %d GeV/c",  fLowerMomBound, fUpperMomBound));
272     AliInfo("Memorandum: 0 means PION | 1 means KAON | 2 means PROTON")
273   }
274
275   if (fNevents == 0) fNevents = (Int_t) AliRunLoader::Instance()->TreeE()->GetEntries();
276
277   for (Int_t ievent = 0; ievent < fNevents; ievent++) {
278     gAlice->GetEvent(ievent);
279     TTree *hitTree = detTOF->GetLoader()->TreeH ();
280     if (!hitTree)
281       return;
282     TParticle*    particle;
283     AliTOFhitT0*  tofHit;
284     TClonesArray* tofHits = detTOF->Hits();
285
286     Int_t lasttrack=-1;
287     Int_t nset=0;
288
289     hitTree->SetBranchStatus("*",0); // switch off all branches
290     hitTree->SetBranchStatus("TOF*",1); // switch on only TOF
291
292     // Start loop on primary tracks in the hits containers
293
294     Int_t ntracks = static_cast<Int_t>(hitTree->GetEntries());
295     for (Int_t track = 0; track < ntracks; track++)
296     {
297       if(nset>=5) break; // check on the number of set analyzed
298       
299       gAlice->GetMCApp()->ResetHits();
300       hitTree->GetEvent(track);
301
302       AliMC *mcApplication = (AliMC*)gAlice->GetMCApp();
303
304       particle = mcApplication->Particle(track);
305       Int_t nhits = tofHits->GetEntriesFast();
306
307       for (Int_t hit = 0; hit < nhits; hit++)
308       {
309         tofHit = (AliTOFhitT0 *) tofHits->UncheckedAt(hit);
310         ipart    = tofHit->GetTrack();
311         // check to discard the case when the same particle is selected more than one
312         // time 
313
314         if (ipart != ipartold){
315           
316           particle = (TParticle*)gAlice->GetMCApp()->Particle(ipart);
317           
318           Float_t idealtime=tofHit->GetTof();
319           //       Float_t time=idealtime;
320           Float_t time   = gRandom->Gaus(idealtime, fTimeResolution);
321           Float_t toflen=tofHit->GetLen();
322           toflen=toflen/100.; // toflen given in m
323           Int_t pdg   = particle->GetPdgCode();
324           Int_t abspdg   =TMath::Abs(pdg);
325           Float_t idealmom  = particle->P();
326           Float_t momres=idealmom*0.025; // 2.5% res token into account for all momenta
327           Float_t mom =gRandom->Gaus(idealmom,momres);
328
329           Bool_t isgoodpart=(abspdg==211 || abspdg==2212 || abspdg==321);
330
331           time*=1.E+9; // tof given in nanoseconds         
332           if (particle->GetFirstMother() < 0 && isgoodpart && mom<=fUpperMomBound && mom>=fLowerMomBound){
333             selected+=1;
334             istop=selected;
335             if(istop>10) break;
336             Int_t index=selected-1;
337             timeofflight[index]=time;
338             tracktoflen[index]=toflen;
339             momentum[index]=mom;
340             //AliInfo(Form(" %d  %d  %d ", timeofflight[index], tracktoflen[index], momentum[index]));
341             switch (abspdg) {
342             case 211:
343               truparticle[index]=0;
344               break ;
345             case 321:
346               truparticle[index]=1;
347               break ;
348             case 2212: 
349               truparticle[index]=2;
350               break ;
351             }
352             
353           }
354           ipartold = ipart;
355           
356           if(istop==10){ // start analysis on current set
357             nset+=1;
358             lasttrack=track;
359             istop=0;
360             selected=0;
361             //AliInfo("starting t0 calculation for current set");
362             for (Int_t i1=0; i1<3;i1++) {
363               beta[0]=momentum[0]/sqrt(massarray[i1]*massarray[i1]+momentum[0]*momentum[0]);
364               for (Int_t i2=0; i2<3;i2++) { 
365                 beta[1]=momentum[1]/sqrt(massarray[i2]*massarray[i2]+momentum[1]*momentum[1]);
366                 for (Int_t i3=0; i3<3;i3++) {
367                   beta[2]=momentum[2]/sqrt(massarray[i3]*massarray[i3]+momentum[2]*momentum[2]);
368                   for (Int_t i4=0; i4<3;i4++) {
369                     beta[3]=momentum[3]/sqrt(massarray[i4]*massarray[i4]+momentum[3]*momentum[3]);
370                     for (Int_t i5=0; i5<3;i5++) {
371                       beta[4]=momentum[4]/sqrt(massarray[i5]*massarray[i5]+momentum[4]*momentum[4]);
372                       for (Int_t i6=0; i6<3;i6++) {
373                         beta[5]=momentum[5]/sqrt(massarray[i6]*massarray[i6]+momentum[5]*momentum[5]);
374                         for (Int_t i7=0; i7<3;i7++) { 
375                           beta[6]=momentum[6]/sqrt(massarray[i7]*massarray[i7]+momentum[6]*momentum[6]);
376                           for (Int_t i8=0; i8<3;i8++) {
377                             beta[7]=momentum[7]/sqrt(massarray[i8]*massarray[i8]+momentum[7]*momentum[7]);
378                             for (Int_t i9=0; i9<3;i9++) {
379                               beta[8]=momentum[8]/sqrt(massarray[i9]*massarray[i9]+momentum[8]*momentum[8]);
380                               for (Int_t i10=0; i10<3;i10++) {  
381                                 beta[9]=momentum[9]/sqrt(massarray[i10]*massarray[i10]+momentum[9]*momentum[9]);
382                                 
383                                 Float_t meantzero=0.;
384                                 Float_t sumAllweights=0.;
385                                 for (Int_t itz=0; itz<10;itz++) {
386                                   sqMomError[itz]=((1.-beta[itz]*beta[itz])*0.025)*((1.-beta[itz]*beta[itz])*0.025)*(tracktoflen[itz]/(0.299792*beta[itz]))*(tracktoflen[itz]/(0.299792*beta[itz])); // this gives the square of the momentum error in nanoseconds
387                                   sqTrackError[itz]=(timeresolutioninns*timeresolutioninns+sqMomError[itz]); // total error for the current track
388                                   sumAllweights+=1./sqTrackError[itz];
389
390                                   timezero[itz]=(tracktoflen[itz]/(beta[itz]*0.299792))-timeofflight[itz];
391                                   weightedtimezero[itz]=((tracktoflen[itz]/(beta[itz]*0.299792))-timeofflight[itz])/sqTrackError[itz];// weighted time zero for current track
392                                   meantzero+=weightedtimezero[itz];
393                                 } // end loop for (Int_t itz=0; itz<10;itz++)
394                                 meantzero=meantzero/sumAllweights; // it is given in [ns]
395                                 
396                                 dummychisquare=0.;
397                                 // calculate the chisquare for the current assignment
398                                 for (Int_t icsq=0; icsq<10;icsq++) {
399                                   dummychisquare+=(timezero[icsq]-meantzero)*(timezero[icsq]-meantzero)/sqTrackError[icsq];
400                                 } // end loop for (Int_t icsq=0; icsq<10;icsq++) 
401
402                                 if(dummychisquare<=chisquare){
403                                   assparticle[0]=i1;
404                                   assparticle[1]=i2;
405                                   assparticle[2]=i3;
406                                   assparticle[3]=i4;
407                                   assparticle[4]=i5;
408                                   assparticle[5]=i6;
409                                   assparticle[6]=i7;
410                                   assparticle[7]=i8;
411                                   assparticle[8]=i9;
412                                   assparticle[9]=i10;
413                                   chisquare=dummychisquare;
414                                   t0best=meantzero;
415                                 } // close if(dummychisquare<=chisquare)
416                                 
417                               } // end loop on i10
418                             } // end loop on i9
419                           } // end loop on i8
420                         } // end loop on i7
421                       } // end loop on i6
422                     } // end loop on i5
423                   } // end loop on i4
424                 } // end loop on i3
425               } // end loop on i2
426             } // end loop on i1
427
428             if(truparticle[0]==assparticle[0] && truparticle[1]==assparticle[1] && truparticle[2]==assparticle[2]  && truparticle[3]==assparticle[3] && truparticle[4]==assparticle[4]&& truparticle[5]==assparticle[5] && truparticle[6]==assparticle[6] && truparticle[7]==assparticle[7]  && truparticle[8]==assparticle[8] && truparticle[9]==assparticle[9]) ngood+=1;
429             if(truparticle[0]!=assparticle[0]) nmisidentified0+=1;
430             if(truparticle[1]!=assparticle[1]) nmisidentified1+=1;
431             if(truparticle[2]!=assparticle[2]) nmisidentified2+=1;
432             if(truparticle[3]!=assparticle[3]) nmisidentified3+=1;
433             if(truparticle[4]!=assparticle[4]) nmisidentified4+=1;
434             if(truparticle[5]!=assparticle[5]) nmisidentified5+=1;
435             if(truparticle[6]!=assparticle[6]) nmisidentified6+=1;
436             if(truparticle[7]!=assparticle[7]) nmisidentified7+=1;
437             if(truparticle[8]!=assparticle[8]) nmisidentified8+=1;
438             if(truparticle[9]!=assparticle[9]) nmisidentified9+=1;
439             // filling histos
440             htzerobest->Fill(t0best);
441             hchibest->Fill(chisquare);
442             Double_t dblechisquare=(Double_t)chisquare;
443             Float_t confLevel=(Float_t)TMath::Prob(dblechisquare,9); // ndf 10-1=9
444             hchibestconflevel->Fill(confLevel);
445             itimes++;
446             if(strstr(option,"all")){
447               AliInfo(Form("True Assignment %d  %d  %d  %d  %d  %d  %d  %d  %d  %d", truparticle[0], truparticle[1], truparticle[2], truparticle[3], truparticle[4], truparticle[5], truparticle[6], truparticle[7], truparticle[8], truparticle[9]));
448               AliInfo(Form("Best Assignment %d  %d  %d  %d  %d  %d  %d  %d  %d  %d", assparticle[0], assparticle[1], assparticle[2], assparticle[3], assparticle[4], assparticle[5], assparticle[6], assparticle[7], assparticle[8], assparticle[9]));
449               AliInfo(Form("Minimum ChiSquare for current set   %d ", chisquare));
450               AliInfo(Form("Confidence Level (Minimum ChiSquare) %d", confLevel));
451             }
452             if (strstr(option,"visual") && itimes && (itimes%kUPDATE) == 0) {
453               if (itimes == kUPDATE){
454                 c1->cd();
455                 htzerobest->Draw();
456                 c2->cd();
457                 hchibest->Draw();
458                 c3->cd();
459                 hchibestconflevel->Draw();
460               }
461               c1->Modified();
462               c1->Update();
463               c2->Modified();
464               c2->Update();
465               c3->Modified();
466               c3->Update();
467               if (gSystem->ProcessEvents())
468                 break;
469             }
470             chisquare=999.;
471             t0best=999.;
472             
473           } // end for the current set. close if(istop==5)
474         } // end condition on ipartold
475       } // end loop on hits for the current track
476       if(istop>=10) break;
477     } // end loop on ntracks  
478   } //event loop
479   
480   if(strstr(option,"all")){
481     nmisidentified=(nmisidentified0+nmisidentified1+nmisidentified2+nmisidentified3+nmisidentified4+nmisidentified5+nmisidentified6+nmisidentified7+nmisidentified8+nmisidentified9);
482     AliInfo(Form("total number of tracks token into account  %i", 10*5*fNevents));
483     Float_t badPercentage=100.*(Float_t)nmisidentified/(10*5*fNevents);
484     AliInfo(Form("total misidentified                       %i (%d %) ", nmisidentified, badPercentage));
485     AliInfo(Form("Total Number of set token into account     %i", 5*fNevents));
486     Float_t goodSetPercentage=100.*(Float_t)ngood/(5*fNevents);
487     AliInfo(Form("Number of set with no misidentified tracks %i (%d %)", ngood, goodSetPercentage));
488   }
489
490   // free used memory for canvas
491   delete c1; c1=0;
492   delete c2; c2=0;
493   delete c3; c3=0;
494
495   // generating output filename only if not previously specified using SetTZeroFile
496   char outFileName[70];
497   strcpy(outFileName,"ht010tr120ps"); // global time resolution has to be converted from Int_t to char
498                                       // in order to have in the output filename this parameter
499   strcat(outFileName,fHeadersFile);
500
501   if(fT0File.IsNull()) fT0File=outFileName;
502
503   TFile* houtfile = new TFile(fT0File,"recreate");
504   houtfile->cd();
505   htzerobest->Write(0,TObject::kOverwrite);
506   hchibest->Write(0,TObject::kOverwrite);
507   hchibestconflevel->Write(0,TObject::kOverwrite);
508   houtfile->Close();  
509   
510   
511   if(strstr(option,"tim") || strstr(option,"all")){
512     gBenchmark->Stop("TOFT0");
513     AliInfo("AliTOFT0:");
514     /*
515     cout << "   took " << gBenchmark->GetCpuTime("TOFT0") << " seconds in order to calculate T0 " 
516          << gBenchmark->GetCpuTime("TOFT0")/fNevents << " seconds per event " << endl ;
517     */
518     gBenchmark->Print("TOFT0");
519   }
520 }
521  
522 //__________________________________________________________________
523 void AliTOFT0::SetTZeroFile(char * file )
524 {
525   //
526   //
527   //
528   printf("Destination file : %s \n", file) ;
529   fT0File=file;
530
531 }
532
533 //__________________________________________________________________
534 void AliTOFT0::Print(Option_t* /*option*/)const
535 {
536   //
537   //
538   //
539   printf("------------------- %s -------------\n", GetName()) ;
540   if(!fT0File.IsNull())
541     printf("  Writing T0 Distribution to file  %s \n",(char*) fT0File.Data());
542
543 }
544
545 //__________________________________________________________________
546 Bool_t AliTOFT0::operator==( AliTOFT0 const &tzero )const
547 {
548   //
549   // Equal operator
550   // 
551
552   if( (fTimeResolution==tzero.fTimeResolution)&&(fLowerMomBound==tzero.fLowerMomBound)&&(fUpperMomBound==tzero.fUpperMomBound))
553     return kTRUE ;
554   else
555     return kFALSE ;
556 }