[u/mrichter/AliRoot.git] / TOF / AliTOFDigitizer.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/


//_________________________________________________________________________
// This is a TTask that makes TOF-Digits out of TOF-Hits.
// A TOF Digit is essentially a TOF hit with the smearing for strip 
// time resolution and simulation of the ADC correlation signal. 
// Digits are written to TreeD in branch "TOF".
// AliTOFDigitizer with all current parameters used for digitization 
// (time resolution and ADC parameter) is written 
// to TreeD branch "AliTOFDigitizer".
// Both branches have the same title. If necessary one can produce 
// another set of Digits with different parameters. Two versions
// can be distunguished using titles of the branches.
// User case:
//  root [0] AliTOFDigitizer * s = new AliTOFDigitizer("galice.root")
//  Warning in <AliITSgeomSPD425Long::Default Creator>: Detector size may not be write.
//  Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
//  root [1] s->ExecuteTask()
//             // Makes Digits for all events stored in galice.root
//  root [2] s->SetTimeRes(100.)
//             // One can change parameters of digitization
//  root [3] s->SetDigitsBranch("Time Resolution 100. ps")
//             // and write them into the new branch
//  root [4] s->ExecuteTask("deb all tim")
//             // available parameters:
//             deb - print number of produced Digits
//             deb all  - print number and list of produced Digits
//             tim - print benchmarking information
//
// -- Author :  F. Pierella (Bologna University) pierella@bo.infn.it
//////////////////////////////////////////////////////////////////////////////

#include "TFile.h"
#include "TTask.h"
#include "TTree.h"
#include "TSystem.h"
#include "TROOT.h"
#include "TFolder.h"
#include "TBenchmark.h"
#include "TObjString.h"

#include <iomanip.h>

#include "AliRun.h"
#include "AliTOF.h"
#include "AliTOFdigit.h"
#include "AliTOFhit.h"
#include "AliTOFDigitizer.h"


ClassImp(AliTOFDigitizer)

           
//____________________________________________________________________________ 
  AliTOFDigitizer::AliTOFDigitizer():TTask("AliTOFDigitizer","") 
{
  // ctor
  fTimeRes       = 100;  // ps
  fChrgRes       = 100.; // pC
  fNevents       = 0 ;      
  fDigits        = 0 ;
  fHits          = 0 ;
  fIsInitialized = kFALSE ;

}

//____________________________________________________________________________ 
AliTOFDigitizer::AliTOFDigitizer(const char* headerFile, const char *digitsTitle):TTask("AliTOFDigitizer","")
{
  // ctor
  fTimeRes       = 100;  // ps
  fChrgRes       = 100.; // pC
  fNevents       = 0 ;      
  fDigitsTitle   = digitsTitle ;
  fHeadersFile   = headerFile ;
  fIsInitialized = kFALSE ;
  Init();
}

//____________________________________________________________________________ 
AliTOFDigitizer::~AliTOFDigitizer()
{
  // dtor
  if(fDigits)
    delete fDigits ;
  if(fHits)
    delete fHits ;
}
//____________________________________________________________________________ 
void AliTOFDigitizer::Init()
{
  // Initialization: open root-file, allocate arrays for hits and digits,
  // attach task Digitizer to the list of TOF tasks
  // 
  // Initialization can not be done in the default constructor

  if(!fIsInitialized){

    if(fHeadersFile.IsNull())
      fHeadersFile="galice.root" ;

    TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
    
    //if file was not opened yet, read gAlice
    if(file == 0){
      if(fHeadersFile.Contains("rfio"))
	file =	TFile::Open(fHeadersFile,"update") ;
      else
	file = new TFile(fHeadersFile.Data(),"update") ;
      gAlice = (AliRun *) file->Get("gAlice") ;
    }
    fHits    = new TClonesArray("AliTOFhit"  , 405);
    fDigits  = new TClonesArray("AliTOFdigit", 405);
    
    //add Task to //FPAlice/tasks/(S)Digitizer/TOF
    TList * aList = gROOT->GetListOfBrowsables();
    if (aList) {
      TFolder * alice  = (TFolder*)aList->FindObject("FPAlice") ;
      if (alice) {
        TTask * aliceSD  = (TTask*)alice->FindObject("tasks/(S)Digitizer") ;
        if (aliceSD) {
          TTask * tofD   = (TTask*)aliceSD->GetListOfTasks()->FindObject("TOF") ;   
          tofD->Add(this) ;
        }
      }
    }

    fIsInitialized = kTRUE ;
  }
}
//____________________________________________________________________________
void AliTOFDigitizer::Exec(Option_t *option) 
{ 
  Int_t    tracks[3];    // track info
  Int_t    vol[5];       // dummy location for digit
  Float_t  digit[2];     // TOF digit variables

  // Collects all hits in the same active volume into digit
  
  if(!fIsInitialized)
    Init() ;

  if(strstr(option,"tim"))
    gBenchmark->Start("TOFDigitizer");
  
  fNevents = (Int_t) gAlice->TreeE()->GetEntries() ; 
  
  Int_t ievent ;
  // start loop on events
  for(ievent = 0; ievent < fNevents; ievent++){
    gAlice->GetEvent(ievent) ;
    gAlice->SetEvent(ievent) ;
    
    if(gAlice->TreeH()==0){
      cout << "AliTOFDigitizer: There is no Hit Tree" << endl;
      return ;
    }
    
    //set address of the hits 
    TBranch * branch = gAlice->TreeH()->GetBranch("TOF");
    if (branch) 
      branch->SetAddress(&fHits);
    else{
      cout << "ERROR in AliTOFDigitizer: "<< endl ;
      cout << "      no branch TOF in TreeH"<< endl ;
      cout << "      do nothing " << endl ;
      return ;
    }
    
    fDigits->Clear();
    Int_t ndigits = 0 ;
    
    //Now made Digits from hits, for TOF it is the same a part for the tof smearing
    // and some missing MC variables     
    Int_t itrack ;
    for (itrack=0; itrack < gAlice->GetNtrack(); itrack++){

      //=========== Get the TOF branch from Hits Tree for the Primary track itrack
      branch->GetEntry(itrack,0);
      
      Int_t i;
      for ( i = 0 ; i < fHits->GetEntries() ; i++ ) {

	AliTOFhit * hit = (AliTOFhit*)fHits->At(i) ;

        vol[0] = hit->GetSector();
        vol[1] = hit->GetPlate();
        vol[2] = hit->GetPadx();
        vol[3] = hit->GetPadz();
        vol[4] = hit->GetStrip();
        // 95% of efficiency to be inserted here
        // edge effect to be inserted here
        // cross talk  to be inserted here
        // simulation of the detector response
        Float_t idealtime = hit->GetTof(); // unit s
        idealtime *= 1.E+12;  // conversion from s to ps  
                              // fTimeRes is given usually in ps
        Float_t tdctime   = gRandom->Gaus(idealtime, fTimeRes);
        digit[0] = tdctime;
        // typical Landau Distribution to be inserted here
        Float_t idealcharge = hit->GetEdep();
        Float_t adccharge = gRandom->Gaus(idealcharge, fChrgRes);
        digit[1] = adccharge;
        // to be added a check for overlaps
        new((*fDigits)[ndigits]) AliTOFdigit(tracks, vol, digit);
	ndigits++ ;  
      } 
      
    } // end loop over tracks

    ndigits = fDigits->GetEntriesFast() ;
    printf("AliTOFDigitizer: Total number of digits %d\n",ndigits);

    if(gAlice->TreeD() == 0)
      gAlice->MakeTree("D") ;
    
    //check, if this branch already exits
    TBranch * digitsBranch = 0;
    TBranch * digitizerBranch = 0;
    
    TObjArray * branches = gAlice->TreeD()->GetListOfBranches() ;
    Int_t ibranch;
    Bool_t tofNotFound = kTRUE ;
    Bool_t digitizerNotFound = kTRUE ;
    
    for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
      
      if(tofNotFound){
	digitsBranch=(TBranch *) branches->At(ibranch) ;
	if( (strcmp("TOF",digitsBranch->GetName())==0 ) &&
	    (fDigitsTitle.CompareTo(digitsBranch->GetTitle()) == 0) )
	  tofNotFound = kFALSE ;
      }
      if(digitizerNotFound){
	digitizerBranch = (TBranch *) branches->At(ibranch) ;
	if( (strcmp(digitizerBranch->GetName(),"AliTOFDigitizer") == 0)&&
	    (fDigitsTitle.CompareTo(digitizerBranch->GetTitle()) == 0) )
	  digitizerNotFound = kFALSE ;
      }
    }

    if(!(digitizerNotFound && tofNotFound)){
      cout << "AliTOFdigitizer error:" << endl ;
      cout << "Can not overwrite existing branches: do not write" << endl ;
      return ;
    }
    
    //Make (if necessary) branches    
    char * file =0;
    if(gSystem->Getenv("CONFIG_SPLIT_FILE")){ //generating file name
      file = new char[strlen(gAlice->GetBaseFile())+20] ;
      sprintf(file,"%s/TOF.Digits.root",gAlice->GetBaseFile()) ;
    }
    
    TDirectory *cwd = gDirectory;
    
    //First list of digits
    Int_t bufferSize = 32000 ;    
    digitsBranch = gAlice->TreeD()->Branch("TOF",&fDigits,bufferSize);
    digitsBranch->SetTitle(fDigitsTitle.Data());
    if (file) {
      digitsBranch->SetFile(file);
      TIter next( digitsBranch->GetListOfBranches());
      TBranch * subbr;
      while ((subbr=(TBranch*)next())) {
	subbr->SetFile(file);
      }   
      cwd->cd();
    } 
      
    //second - Digitizer
    Int_t splitlevel = 0 ;
    AliTOFDigitizer * digtz = this ;
    digitizerBranch = gAlice->TreeD()->Branch("AliTOFDigitizer","AliTOFDigitizer",
					       &digtz,bufferSize,splitlevel); 
    digitizerBranch->SetTitle(fDigitsTitle.Data());
    if (file) {
      digitizerBranch->SetFile(file);
      TIter next( digitizerBranch->GetListOfBranches());
      TBranch * subbr ;
      while ((subbr=(TBranch*)next())) {
	subbr->SetFile(file);
      }   
      cwd->cd();
      delete file;
    }

    digitsBranch->Fill();
    digitizerBranch->Fill();
    gAlice->TreeD()->Write(0,TObject::kOverwrite) ;
    
    if(strstr(option,"deb"))
      PrintDigits(option) ;
    
  }
  
  if(strstr(option,"tim")){
    gBenchmark->Stop("TOFDigitizer");
    cout << "AliTOFDigitizer:" << endl ;
    cout << "   took " << gBenchmark->GetCpuTime("TOFDigitizer") << " seconds for Digitizing " 
	 <<  gBenchmark->GetCpuTime("TOFDigitizer")/fNevents << " seconds per event " << endl ;
    cout << endl ;
  }
  
  
}
//__________________________________________________________________
void AliTOFDigitizer::SetDigitsBranch(const char* title )
{
  // Setting title to branch Digits 
  if(!fDigitsTitle.IsNull())
    cout << "AliTOFdigitizer: changing Digits file from " <<fDigitsTitle.Data() << " to " << title << endl ;
  fDigitsTitle=title ;
}
//__________________________________________________________________
void AliTOFDigitizer::Print(Option_t* option)const
{
  // Prints parameters of Digitizer
  cout << "------------------- "<< GetName() << " -------------" << endl ;
  cout << "   Writing Digits to branch with title  " << fDigitsTitle.Data() << endl ;
  cout << "   with digitization parameters Time resolution        = " << fTimeRes << endl ;
  cout << "                                Adc smearing parameter = " << fChrgRes << endl ;
  cout << "---------------------------------------------------"<<endl ;
  
}
//__________________________________________________________________
Bool_t AliTOFDigitizer::operator==( AliTOFDigitizer const &digtz )const
{
  // Equal operator.
  // Dititizers are equal if their time resolution and Adc 
  // smearing parameter are equal

  if( (fTimeRes==digtz.fTimeRes)&&(fChrgRes==digtz.fChrgRes))
    return kTRUE ;
  else
    return kFALSE ;
}
//__________________________________________________________________
void AliTOFDigitizer::PrintDigits(Option_t * option)
{
  // Prints list of digits produced in the current pass of AliTOFDigitizer
  
  cout << "AliTOFDigitizer: " << endl ;
  cout << "       Number of entries in Digits list  " << fDigits->GetEntriesFast() << endl ;
  cout << endl ;
  
  if(strstr(option,"all")){// print all digits
    
    //loop over digits
    AliTOFdigit * digit;
    cout << "Digit # " << " Time of flight(ps) " << 
            "  ADC(pC)"  <<  " Sector #" << " Plate #" << 
            " Strip #" << " Pad # (x) " << " Pad # (z) " << endl;    
    Int_t index ;
    for (index = 0 ; index < fDigits->GetEntries() ; index++) {
      digit = (AliTOFdigit * )  fDigits->At(index) ;

      // set the width of the output with the setw(int width) manipulator

      cout << setw(7)  <<  index << " " 
           << setw(13) <<  digit->GetTdc()    << "  "  
	   << setw(13) <<  digit->GetAdc()    << "  "   
	   << setw(6)  <<  digit->GetSector() << "  "   
	   << setw(6)  <<  digit->GetPlate()  << "  "   
	   << setw(6)  <<  digit->GetStrip()  << "  "   
	   << setw(7)  <<  digit->GetPadx()   << "  "   
	   << setw(7)  <<  digit->GetPadz()   << "  " << endl;   
      
    } // end loop on digits
    
  } // close if "all" option selected
}
Commit	Line	Data
68861244	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	// This is a TTask that makes TOF-Digits out of TOF-Hits.
	19	// A TOF Digit is essentially a TOF hit with the smearing for strip
	20	// time resolution and simulation of the ADC correlation signal.
	21	// Digits are written to TreeD in branch "TOF".
	22	// AliTOFDigitizer with all current parameters used for digitization
	23	// (time resolution and ADC parameter) is written
	24	// to TreeD branch "AliTOFDigitizer".
	25	// Both branches have the same title. If necessary one can produce
	26	// another set of Digits with different parameters. Two versions
	27	// can be distunguished using titles of the branches.
	28	// User case:
	29	// root [0] AliTOFDigitizer * s = new AliTOFDigitizer("galice.root")
	30	// Warning in <AliITSgeomSPD425Long::Default Creator>: Detector size may not be write.
	31	// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
	32	// root [1] s->ExecuteTask()
	33	// // Makes Digits for all events stored in galice.root
	34	// root [2] s->SetTimeRes(100.)
	35	// // One can change parameters of digitization
	36	// root [3] s->SetDigitsBranch("Time Resolution 100. ps")
	37	// // and write them into the new branch
	38	// root [4] s->ExecuteTask("deb all tim")
	39	// // available parameters:
	40	// deb - print number of produced Digits
	41	// deb all - print number and list of produced Digits
	42	// tim - print benchmarking information
	43	//
	44	// -- Author : F. Pierella (Bologna University) pierella@bo.infn.it
	45	//////////////////////////////////////////////////////////////////////////////
	46
	47	#include "TFile.h"
	48	#include "TTask.h"
	49	#include "TTree.h"
	50	#include "TSystem.h"
	51	#include "TROOT.h"
	52	#include "TFolder.h"
	53	#include "TBenchmark.h"
0efc163f	54	#include "TObjString.h"
68861244	55
	56	#include <iomanip.h>
	57
	58	#include "AliRun.h"
0efc163f	59	#include "AliTOF.h"
68861244	60	#include "AliTOFdigit.h"
	61	#include "AliTOFhit.h"
	62	#include "AliTOFDigitizer.h"
	63
	64
	65	ClassImp(AliTOFDigitizer)
	66
	67
	68	//____________________________________________________________________________
	69	AliTOFDigitizer::AliTOFDigitizer():TTask("AliTOFDigitizer","")
	70	{
	71	// ctor
	72	fTimeRes = 100; // ps
	73	fChrgRes = 100.; // pC
	74	fNevents = 0 ;
	75	fDigits = 0 ;
	76	fHits = 0 ;
	77	fIsInitialized = kFALSE ;
	78
	79	}
	80
	81	//____________________________________________________________________________
	82	AliTOFDigitizer::AliTOFDigitizer(const char* headerFile, const char *digitsTitle):TTask("AliTOFDigitizer","")
	83	{
	84	// ctor
	85	fTimeRes = 100; // ps
	86	fChrgRes = 100.; // pC
	87	fNevents = 0 ;
	88	fDigitsTitle = digitsTitle ;
	89	fHeadersFile = headerFile ;
	90	fIsInitialized = kFALSE ;
	91	Init();
	92	}
	93
	94	//____________________________________________________________________________
	95	AliTOFDigitizer::~AliTOFDigitizer()
	96	{
	97	// dtor
	98	if(fDigits)
	99	delete fDigits ;
	100	if(fHits)
	101	delete fHits ;
	102	}
	103	//____________________________________________________________________________
	104	void AliTOFDigitizer::Init()
	105	{
	106	// Initialization: open root-file, allocate arrays for hits and digits,
	107	// attach task Digitizer to the list of TOF tasks
	108	//
	109	// Initialization can not be done in the default constructor
	110
	111	if(!fIsInitialized){
	112
	113	if(fHeadersFile.IsNull())
	114	fHeadersFile="galice.root" ;
	115
	116	TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
	117
	118	//if file was not opened yet, read gAlice
	119	if(file == 0){
	120	if(fHeadersFile.Contains("rfio"))
	121	file = TFile::Open(fHeadersFile,"update") ;
	122	else
	123	file = new TFile(fHeadersFile.Data(),"update") ;
124	gAlice = (AliRun *) file->Get("gAlice") ;
125	}
126	fHits = new TClonesArray("AliTOFhit" , 405);
127	fDigits = new TClonesArray("AliTOFdigit", 405);
128
129	//add Task to //FPAlice/tasks/(S)Digitizer/TOF
6b77798a	130	TList * aList = gROOT->GetListOfBrowsables();
	131	if (aList) {
	132	TFolder * alice = (TFolder*)aList->FindObject("FPAlice") ;
	133	if (alice) {
	134	TTask * aliceSD = (TTask*)alice->FindObject("tasks/(S)Digitizer") ;
	135	if (aliceSD) {
	136	TTask * tofD = (TTask*)aliceSD->GetListOfTasks()->FindObject("TOF") ;
	137	tofD->Add(this) ;
	138	}
	139	}
	140	}
68861244	141
	142	fIsInitialized = kTRUE ;
	143	}
	144	}
	145	//____________________________________________________________________________
	146	void AliTOFDigitizer::Exec(Option_t *option)
	147	{
	148	Int_t tracks[3]; // track info
	149	Int_t vol[5]; // dummy location for digit
	150	Float_t digit[2]; // TOF digit variables
	151
68861244	152	// Collects all hits in the same active volume into digit
	153
	154	if(!fIsInitialized)
	155	Init() ;
	156
	157	if(strstr(option,"tim"))
	158	gBenchmark->Start("TOFDigitizer");
	159
	160	fNevents = (Int_t) gAlice->TreeE()->GetEntries() ;
	161
	162	Int_t ievent ;
	163	// start loop on events
	164	for(ievent = 0; ievent < fNevents; ievent++){
	165	gAlice->GetEvent(ievent) ;
	166	gAlice->SetEvent(ievent) ;
	167
	168	if(gAlice->TreeH()==0){
	169	cout << "AliTOFDigitizer: There is no Hit Tree" << endl;
	170	return ;
	171	}
	172
	173	//set address of the hits
	174	TBranch * branch = gAlice->TreeH()->GetBranch("TOF");
	175	if (branch)
	176	branch->SetAddress(&fHits);
	177	else{
	178	cout << "ERROR in AliTOFDigitizer: "<< endl ;
	179	cout << " no branch TOF in TreeH"<< endl ;
	180	cout << " do nothing " << endl ;
	181	return ;
	182	}
	183
	184	fDigits->Clear();
	185	Int_t ndigits = 0 ;
	186
	187	//Now made Digits from hits, for TOF it is the same a part for the tof smearing
	188	// and some missing MC variables
	189	Int_t itrack ;
	190	for (itrack=0; itrack < gAlice->GetNtrack(); itrack++){
	191
	192	//=========== Get the TOF branch from Hits Tree for the Primary track itrack
	193	branch->GetEntry(itrack,0);
	194
	195	Int_t i;
	196	for ( i = 0 ; i < fHits->GetEntries() ; i++ ) {
	197
	198	AliTOFhit * hit = (AliTOFhit*)fHits->At(i) ;
	199
	200	vol[0] = hit->GetSector();
	201	vol[1] = hit->GetPlate();
	202	vol[2] = hit->GetPadx();
	203	vol[3] = hit->GetPadz();
	204	vol[4] = hit->GetStrip();
	205	// 95% of efficiency to be inserted here
	206	// edge effect to be inserted here
	207	// cross talk to be inserted here
	208	// simulation of the detector response
	209	Float_t idealtime = hit->GetTof(); // unit s
	210	idealtime *= 1.E+12; // conversion from s to ps
	211	// fTimeRes is given usually in ps
0efc163f	212	Float_t tdctime = gRandom->Gaus(idealtime, fTimeRes);
68861244	213	digit[0] = tdctime;
	214	// typical Landau Distribution to be inserted here
	215	Float_t idealcharge = hit->GetEdep();
0efc163f	216	Float_t adccharge = gRandom->Gaus(idealcharge, fChrgRes);
68861244	217	digit[1] = adccharge;
	218	// to be added a check for overlaps
	219	new((*fDigits)[ndigits]) AliTOFdigit(tracks, vol, digit);
	220	ndigits++ ;
	221	}
	222
	223	} // end loop over tracks
	224
68861244	225	ndigits = fDigits->GetEntriesFast() ;
	226	printf("AliTOFDigitizer: Total number of digits %d\n",ndigits);
	227
	228	if(gAlice->TreeD() == 0)
	229	gAlice->MakeTree("D") ;
	230
	231	//check, if this branch already exits
	232	TBranch * digitsBranch = 0;
	233	TBranch * digitizerBranch = 0;
	234
	235	TObjArray * branches = gAlice->TreeD()->GetListOfBranches() ;
	236	Int_t ibranch;
	237	Bool_t tofNotFound = kTRUE ;
	238	Bool_t digitizerNotFound = kTRUE ;
	239
	240	for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
	241
	242	if(tofNotFound){
	243	digitsBranch=(TBranch *) branches->At(ibranch) ;
	244	if( (strcmp("TOF",digitsBranch->GetName())==0 ) &&
	245	(fDigitsTitle.CompareTo(digitsBranch->GetTitle()) == 0) )
	246	tofNotFound = kFALSE ;
	247	}
	248	if(digitizerNotFound){
	249	digitizerBranch = (TBranch *) branches->At(ibranch) ;
	250	if( (strcmp(digitizerBranch->GetName(),"AliTOFDigitizer") == 0)&&
	251	(fDigitsTitle.CompareTo(digitizerBranch->GetTitle()) == 0) )
	252	digitizerNotFound = kFALSE ;
	253	}
	254	}
	255
	256	if(!(digitizerNotFound && tofNotFound)){
	257	cout << "AliTOFdigitizer error:" << endl ;
	258	cout << "Can not overwrite existing branches: do not write" << endl ;
	259	return ;
	260	}
	261
	262	//Make (if necessary) branches
	263	char * file =0;
	264	if(gSystem->Getenv("CONFIG_SPLIT_FILE")){ //generating file name
	265	file = new char[strlen(gAlice->GetBaseFile())+20] ;
	266	sprintf(file,"%s/TOF.Digits.root",gAlice->GetBaseFile()) ;
	267	}
	268
	269	TDirectory *cwd = gDirectory;
	270
	271	//First list of digits
	272	Int_t bufferSize = 32000 ;
	273	digitsBranch = gAlice->TreeD()->Branch("TOF",&fDigits,bufferSize);
	274	digitsBranch->SetTitle(fDigitsTitle.Data());
	275	if (file) {
	276	digitsBranch->SetFile(file);
	277	TIter next( digitsBranch->GetListOfBranches());
	278	TBranch * subbr;
	279	while ((subbr=(TBranch*)next())) {
	280	subbr->SetFile(file);
	281	}
	282	cwd->cd();
	283	}
	284
	285	//second - Digitizer
	286	Int_t splitlevel = 0 ;
	287	AliTOFDigitizer * digtz = this ;
	288	digitizerBranch = gAlice->TreeD()->Branch("AliTOFDigitizer","AliTOFDigitizer",
289	&digtz,bufferSize,splitlevel);
290	digitizerBranch->SetTitle(fDigitsTitle.Data());
291	if (file) {
292	digitizerBranch->SetFile(file);
293	TIter next( digitizerBranch->GetListOfBranches());
294	TBranch * subbr ;
295	while ((subbr=(TBranch*)next())) {
296	subbr->SetFile(file);
297	}
298	cwd->cd();
299	delete file;
300	}
301
302	digitsBranch->Fill();
303	digitizerBranch->Fill();
304	gAlice->TreeD()->Write(0,TObject::kOverwrite) ;
305
306	if(strstr(option,"deb"))
307	PrintDigits(option) ;
308
309	}
310
311	if(strstr(option,"tim")){
312	gBenchmark->Stop("TOFDigitizer");
313	cout << "AliTOFDigitizer:" << endl ;
314	cout << " took " << gBenchmark->GetCpuTime("TOFDigitizer") << " seconds for Digitizing "
315	<< gBenchmark->GetCpuTime("TOFDigitizer")/fNevents << " seconds per event " << endl ;
316	cout << endl ;
317	}
318
319
320	}
321	//__________________________________________________________________
322	void AliTOFDigitizer::SetDigitsBranch(const char* title )
323	{
324	// Setting title to branch Digits
325	if(!fDigitsTitle.IsNull())
326	cout << "AliTOFdigitizer: changing Digits file from " <<fDigitsTitle.Data() << " to " << title << endl ;
327	fDigitsTitle=title ;
328	}
329	//__________________________________________________________________
330	void AliTOFDigitizer::Print(Option_t* option)const
331	{
332	// Prints parameters of Digitizer
333	cout << "------------------- "<< GetName() << " -------------" << endl ;
334	cout << " Writing Digits to branch with title " << fDigitsTitle.Data() << endl ;
335	cout << " with digitization parameters Time resolution = " << fTimeRes << endl ;
336	cout << " Adc smearing parameter = " << fChrgRes << endl ;
337	cout << "---------------------------------------------------"<<endl ;
338
339	}
340	//__________________________________________________________________
341	Bool_t AliTOFDigitizer::operator==( AliTOFDigitizer const &digtz )const
342	{
343	// Equal operator.
344	// Dititizers are equal if their time resolution and Adc
345	// smearing parameter are equal
346
347	if( (fTimeRes==digtz.fTimeRes)&&(fChrgRes==digtz.fChrgRes))
348	return kTRUE ;
349	else
350	return kFALSE ;
351	}
352	//__________________________________________________________________
353	void AliTOFDigitizer::PrintDigits(Option_t * option)
354	{
355	// Prints list of digits produced in the current pass of AliTOFDigitizer
356
357	cout << "AliTOFDigitizer: " << endl ;
358	cout << " Number of entries in Digits list " << fDigits->GetEntriesFast() << endl ;
359	cout << endl ;
360
361	if(strstr(option,"all")){// print all digits
362
363	//loop over digits
364	AliTOFdigit * digit;
365	cout << "Digit # " << " Time of flight(ps) " <<
366	" ADC(pC)" << " Sector #" << " Plate #" <<
367	" Strip #" << " Pad # (x) " << " Pad # (z) " << endl;
368	Int_t index ;
369	for (index = 0 ; index < fDigits->GetEntries() ; index++) {
370	digit = (AliTOFdigit * ) fDigits->At(index) ;
371
372	// set the width of the output with the setw(int width) manipulator
373
374	cout << setw(7) << index << " "
375	<< setw(13) << digit->GetTdc() << " "
376	<< setw(13) << digit->GetAdc() << " "
377	<< setw(6) << digit->GetSector() << " "
378	<< setw(6) << digit->GetPlate() << " "
379	<< setw(6) << digit->GetStrip() << " "
380	<< setw(7) << digit->GetPadx() << " "
381	<< setw(7) << digit->GetPadz() << " " << endl;
382
383	} // end loop on digits
384
385	} // close if "all" option selected
386	}