[u/mrichter/AliRoot.git] / EMCAL / AliEMCALSDigitizer.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.                  *
 **************************************************************************/

/* $Id$ */

//_________________________________________________________________________
// This is a TTask that makes SDigits out of Hits
// A Summable Digits is the sum of all hits originating 
// from one in one tower of the EMCAL 
// A threshold for assignment of the primary to SDigit is applied 
// SDigits are written to TreeS, branch "EMCAL"
// AliEMCALSDigitizer with all current parameters is written 
// to TreeS branch "AliEMCALSDigitizer".
// Both branches have the same title. If necessary one can produce 
// another set of SDigits with different parameters. Two versions
// can be distunguished using titles of the branches.
// User case:
// root [0] AliEMCALSDigitizer * s = new AliEMCALSDigitizer("galice.root")
// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
// root [1] s->ExecuteTask()
//             // Makes SDigitis for all events stored in galice.root
// root [2] s->SetPedestalParameter(0.001)
//             // One can change parameters of digitization
// root [3] s->SetSDigitsBranch("Redestal 0.001")
//             // and write them into the new branch
// root [4] s->ExeciteTask("deb all tim")
//             // available parameters:
//             deb - print # of produced SDigitis
//             deb all  - print # and list of produced SDigits
//             tim - print benchmarking information
//
//*-- Author : Sahal Yacoob (LBL)
// based on  : AliPHOSSDigitzer 
//////////////////////////////////////////////////////////////////////////////


// --- ROOT system ---
#include "TFile.h"
#include "TTask.h"
#include "TTree.h"
#include "TSystem.h"
#include "TROOT.h"
#include "TFolder.h"
#include "TBenchmark.h"
// --- Standard library ---
#include <iomanip.h>

// --- AliRoot header files ---
#include "AliRun.h"
#include "AliEMCALDigit.h"
#include "AliEMCALHit.h"
#include "AliEMCALSDigitizer.h"
#include "AliEMCALGeometry.h"
#include "AliEMCALv1.h"

ClassImp(AliEMCALSDigitizer)

           
//____________________________________________________________________________ 
  AliEMCALSDigitizer::AliEMCALSDigitizer():TTask("AliEMCALSDigitizer","") 
{
  // ctor
  fA = 0;
  fB = 10000000. ;
  fPrimThreshold = 0.01 ;
  fNevents = 0 ;     
  fSDigits = 0 ;
  fHits = 0 ;
  fIsInitialized = kFALSE ;

}

//____________________________________________________________________________ 
AliEMCALSDigitizer::AliEMCALSDigitizer(const char* headerFile, const char *sDigitsTitle):TTask("AliEMCALSDigitizer","")
{
  // ctor
  fA = 0;
  fB = 10000000.;
  fPrimThreshold = 0.01 ;
  fNevents = 0 ;      
  fSDigitsTitle = sDigitsTitle ;
  fHeadersFile = headerFile ;
  fSDigits = new TClonesArray("AliEMCALDigit",1000);
  fHits    = new TClonesArray("AliEMCALHit",1000);

  TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
  
  //File was not opened yet
  if(file == 0){
    if(fHeadersFile.Contains("rfio"))
      file =	TFile::Open(fHeadersFile,"update") ;
    else
      file = new TFile(fHeadersFile.Data(),"update") ;
    gAlice = (AliRun *) file->Get("gAlice") ;
  }
  
  //add Task to //root/Tasks folder
  TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ; 
  roottasks->Add(this) ; 
  
  fIsInitialized = kTRUE ;
}

//____________________________________________________________________________ 
AliEMCALSDigitizer::~AliEMCALSDigitizer()
{
  // dtor
  if(fSDigits)
    delete fSDigits ;
  if(fHits)
    delete fHits ;
}
//____________________________________________________________________________ 
void AliEMCALSDigitizer::Init(){
  //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){
      file = new TFile(fHeadersFile.Data(),"update") ;
      gAlice = (AliRun *) file->Get("gAlice") ;
    }
    
    fHits    = new TClonesArray("AliEMCALHit",1000);
    fSDigits = new TClonesArray("AliEMCALDigit",1000);
    
    // add Task to //root/Tasks folder
    TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ; 
    roottasks->Add(this) ; 
    
    fIsInitialized = kTRUE ;
  }
}
//____________________________________________________________________________
void AliEMCALSDigitizer::Exec(Option_t *option) { 
  //Collects all hits in the same active volume into digit
  
  if(!fIsInitialized)
    Init() ;

  if(strstr(option,"tim"))
    gBenchmark->Start("EMCALSDigitizer");
  
  fNevents = (Int_t) gAlice->TreeE()->GetEntries() ; 
  
  Int_t ievent ;
  for(ievent = 0; ievent < fNevents; ievent++){
    gAlice->GetEvent(ievent) ;
    gAlice->SetEvent(ievent) ;
    
    if(gAlice->TreeH()==0){
      cout << "AliEMCALSDigitizer: There is no Hit Tree" << endl;
      return ;
    }
    
    //set address of the hits 
    TBranch * branch = gAlice->TreeH()->GetBranch("EMCAL");
    if (branch) 
      branch->SetAddress(&fHits);
    else{
      cout << "ERROR in AliEMCALSDigitizer: "<< endl ;
      cout << "      no branch EMCAL in TreeH"<< endl ;
      cout << "      do nothing " << endl ;
      return ;
    }
    
    fSDigits->Clear();
    Int_t nSdigits = 0 ;
    
    
    //Now made SDigits from hits, for EMCAL it is the same, so just copy    
    Int_t itrack ;
    for (itrack=0; itrack < gAlice->GetNtrack(); itrack++){
      
      //=========== Get the EMCAL branch from Hits Tree for the Primary track itrack
      branch->GetEntry(itrack,0);
      AliEMCALv0 * EMCAL = (AliEMCALv0 *) gAlice->GetDetector("EMCAL") ;
      AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance( EMCAL->GetGeometry()->GetName(), EMCAL->GetGeometry()->GetTitle() );
 
      Int_t i;
      for ( i = 0 ; i < fHits->GetEntries() ; i++ ) {
	AliEMCALHit * hit = (AliEMCALHit*)fHits->At(i) ;
        AliEMCALDigit  * curSDigit = 0  ;
        AliEMCALDigit * sdigit ;
        Bool_t newsdigit = kTRUE; 
// Assign primary number only if contribution is significant
        if( hit->GetEnergy() > fPrimThreshold)
   curSDigit =  new AliEMCALDigit( hit->GetPrimary(), hit->GetIparent(), (((hit->GetId()/geom->GetNPhi())%geom->GetNZ()+1 ) * (hit->GetId()%(geom->GetNPhi()+1))), Digitize( hit->GetEnergy() ) ) ;
        else
   curSDigit =  new AliEMCALDigit( -1               , -1               ,(((hit->GetId()/geom->GetNPhi())%geom->GetNZ() + 1 ) * (hit->GetId()%(geom->GetNPhi()+1))), Digitize( hit->GetEnergy() ) ) ;
     cout << "Hit ID = " <<hit->GetId() << endl ; 
     cout << "ID for detector = " << curSDigit->GetId() << endl ;  
           cout << hit->GetEnergy() << " - hit energy   -   Digit Energy - " << curSDigit->GetAmp() << endl;
      for(Int_t check= 0; check < nSdigits ; check++) {
          sdigit = (AliEMCALDigit *)fSDigits->At(check);
          if( sdigit->GetId() == curSDigit->GetId())   
            { cout << "SDigit - Get Amp  " << sdigit->GetAmp() << endl ; 
             *sdigit = *sdigit + *curSDigit ;
              newsdigit = kFALSE;
            cout << " and after addition " << sdigit->GetAmp() << endl ; 
           }
          }
     if (newsdigit) 
         { new((*fSDigits)[nSdigits])  AliEMCALDigit(*curSDigit);
	  nSdigits++ ;  
	cout << "Detector nsdigits = " << nSdigits << endl ; }
        newsdigit = kTRUE;  
         

        if( hit->GetEnergy() > fPrimThreshold)
      curSDigit =  new AliEMCALDigit( hit->GetPrimary(), hit->GetIparent(), ((geom->GetNZ() * geom->GetNPhi()) + ((hit->GetId()/geom->GetNPhi())%geom->GetNZ() + 1) * (hit->GetId()%(geom->GetNPhi()+1))), Digitize( hit->GetEnergy() ) ) ;
        else
    curSDigit =  new AliEMCALDigit( -1               , -1               ,((geom->GetNZ() * geom->GetNPhi()) + ((hit->GetId()/geom->GetNPhi())%geom->GetNZ()+1) * (hit->GetId()%(geom->GetNPhi()+1))), Digitize( hit->GetEnergy() ) ) ;
 
      if((hit->GetId()/geom->GetNPhi()) < (2*geom->GetNZ())) 
       { cout << "ID for Preshower = " << curSDigit->GetId()  << endl ;
        for(Int_t check= 0; check < nSdigits; check++) {
          sdigit = (AliEMCALDigit *)fSDigits->At(check);
          if( sdigit->GetId() == curSDigit->GetId())   
           { 
             *sdigit = *sdigit + *curSDigit ;
             newsdigit = kFALSE ;
            }
           }
     if (newsdigit) 
         { new((*fSDigits)[nSdigits])  AliEMCALDigit(*curSDigit);
	  nSdigits++ ;  
	cout << "Preshower nsdigits = " << nSdigits << endl ;}
        newsdigit=kTRUE;	
      } 
     } 
    } // loop over tracks
    
    fSDigits->Sort() ;
    
    nSdigits = fSDigits->GetEntriesFast() ;
    fSDigits->Expand(nSdigits) ;
    
    Int_t i ;
    for (i = 0 ; i < nSdigits ; i++) { 
      AliEMCALDigit * digit = (AliEMCALDigit *) fSDigits->At(i) ; 
      digit->SetIndexInList(i) ;     
    }

    if(gAlice->TreeS() == 0)
      gAlice->MakeTree("S") ;
    
    //check, if this branch already exits?
    TBranch * sdigitsBranch = 0;
    TBranch * sdigitizerBranch = 0;
    
    TObjArray * branches = gAlice->TreeS()->GetListOfBranches() ;
    Int_t ibranch;
    Bool_t emcalNotFound = kTRUE ;
    Bool_t sdigitizerNotFound = kTRUE ;
    
    for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
      
      if(emcalNotFound){
	sdigitsBranch=(TBranch *) branches->At(ibranch) ;
	if( (strcmp("EMCAL",sdigitsBranch->GetName())==0 ) &&
	    (fSDigitsTitle.CompareTo(sdigitsBranch->GetTitle()) == 0) )
	  emcalNotFound = kFALSE ;
      }
      if(sdigitizerNotFound){
	sdigitizerBranch = (TBranch *) branches->At(ibranch) ;
	if( (strcmp(sdigitizerBranch->GetName(),"AliEMCALSDigitizer") == 0)&&
	    (fSDigitsTitle.CompareTo(sdigitizerBranch->GetTitle()) == 0) )
	  sdigitizerNotFound = kFALSE ;
      }
    }

    if(!(sdigitizerNotFound && emcalNotFound)){
      cout << "AliEMCALSdigitizer 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/EMCAL.SDigits.root",gAlice->GetBaseFile()) ;
    }
    
    TDirectory *cwd = gDirectory;
    
    //First list of sdigits
    Int_t bufferSize = 32000 ;    
    sdigitsBranch = gAlice->TreeS()->Branch("EMCAL",&fSDigits,bufferSize);
    sdigitsBranch->SetTitle(fSDigitsTitle.Data());
    if (file) {
      sdigitsBranch->SetFile(file);
      TIter next( sdigitsBranch->GetListOfBranches());
      TBranch * subbr;
      while ((subbr=(TBranch*)next())) {
	subbr->SetFile(file);
      }   
      cwd->cd();
    } 
      
    //second - SDigitizer
    Int_t splitlevel = 0 ;
    AliEMCALSDigitizer * sd = this ;
    sdigitizerBranch = gAlice->TreeS()->Branch("AliEMCALSDigitizer","AliEMCALSDigitizer",
					       &sd,bufferSize,splitlevel); 
    sdigitizerBranch->SetTitle(fSDigitsTitle.Data());
    if (file) {
      sdigitizerBranch->SetFile(file);
      TIter next( sdigitizerBranch->GetListOfBranches());
      TBranch * subbr ;
      while ((subbr=(TBranch*)next())) {
	subbr->SetFile(file);
      }   
      cwd->cd();
      delete file;
    }

    sdigitsBranch->Fill() ;
    sdigitizerBranch->Fill() ;
    gAlice->TreeS()->Write(0,TObject::kOverwrite) ;
    
    if(strstr(option,"deb"))
      PrintSDigits(option) ;
    
  }
  
  if(strstr(option,"tim")){
    gBenchmark->Stop("EMCALSDigitizer");
    cout << "AliEMCALSDigitizer:" << endl ;
    cout << "   took " << gBenchmark->GetCpuTime("EMCALSDigitizer") << " seconds for SDigitizing " 
	 <<  gBenchmark->GetCpuTime("EMCALSDigitizer")/fNevents << " seconds per event " << endl ;
    cout << endl ;
  }
  
  
}
//__________________________________________________________________
void AliEMCALSDigitizer::SetSDigitsBranch(const char * title ){
  //Seting title to branch SDigits 
  if(!fSDigitsTitle.IsNull())
    cout << "AliEMCALSdigitizer: changing SDigits file from " <<fSDigitsTitle.Data() << " to " << title << endl ;
  fSDigitsTitle=title ;
}
//__________________________________________________________________
void AliEMCALSDigitizer::Print(Option_t* option)const{
  cout << "------------------- "<< GetName() << " -------------" << endl ;
  cout << "   Writing SDigitis to branch with title  " << fSDigitsTitle.Data() << endl ;
  cout << "   with digitization parameters  A = " << fA << endl ;
  cout << "                                 B = " << fB << endl ;
  cout << "   Threshold for Primary assignment= " << fPrimThreshold << endl ; 
  cout << "---------------------------------------------------"<<endl ;
  
}
//__________________________________________________________________
Bool_t AliEMCALSDigitizer::operator==( AliEMCALSDigitizer const &sd )const{
  if( (fA==sd.fA)&&(fB==sd.fB)&&(fPrimThreshold==sd.fPrimThreshold))
    return kTRUE ;
  else
    return kFALSE ;
}
//__________________________________________________________________
void AliEMCALSDigitizer::PrintSDigits(Option_t * option){
  //Prints list of digits produced at the current pass of AliEMCALDigitizer
  
  cout << "AliEMCALSDigitizer: " << endl ;
  cout << "       Number of entries in SDigits list  " << fSDigits->GetEntriesFast() << endl ;
  cout << endl ;
  
  if(strstr(option,"all")){// print all digits
    
    //loop over digits
    AliEMCALDigit * digit;
    cout << "SDigit Id " << " Amplitude " <<  " Index "  <<  " Nprim " << " Primaries list " <<  endl;    
    Int_t index ;
    for (index = 0 ; index < fSDigits->GetEntries() ; index++) {
      digit = (AliEMCALDigit * )  fSDigits->At(index) ;
      cout << setw(8)  <<  digit->GetId() << " "  << 	setw(3)  <<  digit->GetAmp() <<   "  "  
	   << setw(6)  <<  digit->GetIndexInList() << "  "   
	   << setw(5)  <<  digit->GetNprimary() <<"  ";
      
      Int_t iprimary;
      for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++)
	cout << setw(5)  <<  digit->GetPrimary(iprimary+1) << "  ";
      cout << endl;  	 
    }
    
  }
}
Commit	Line	Data
ffa6d63b	1	/*************************************************************************
61e0abb5	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	// This is a TTask that makes SDigits out of Hits
	20	// A Summable Digits is the sum of all hits originating
ffa6d63b	21	// from one in one tower of the EMCAL
61e0abb5	22	// A threshold for assignment of the primary to SDigit is applied
	23	// SDigits are written to TreeS, branch "EMCAL"
	24	// AliEMCALSDigitizer with all current parameters is written
	25	// to TreeS branch "AliEMCALSDigitizer".
	26	// Both branches have the same title. If necessary one can produce
	27	// another set of SDigits with different parameters. Two versions
	28	// can be distunguished using titles of the branches.
	29	// User case:
	30	// root [0] AliEMCALSDigitizer * s = new AliEMCALSDigitizer("galice.root")
	31	// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
	32	// root [1] s->ExecuteTask()
	33	// // Makes SDigitis for all events stored in galice.root
	34	// root [2] s->SetPedestalParameter(0.001)
	35	// // One can change parameters of digitization
	36	// root [3] s->SetSDigitsBranch("Redestal 0.001")
	37	// // and write them into the new branch
	38	// root [4] s->ExeciteTask("deb all tim")
	39	// // available parameters:
	40	// deb - print # of produced SDigitis
	41	// deb all - print # and list of produced SDigits
	42	// tim - print benchmarking information
	43	//
ffa6d63b	44	//*-- Author : Sahal Yacoob (LBL)
ffa6d63b	45	// based on : AliPHOSSDigitzer
61e0abb5	46	//////////////////////////////////////////////////////////////////////////////
	47
	48
	49	// --- ROOT system ---
	50	#include "TFile.h"
	51	#include "TTask.h"
	52	#include "TTree.h"
	53	#include "TSystem.h"
	54	#include "TROOT.h"
	55	#include "TFolder.h"
	56	#include "TBenchmark.h"
	57	// --- Standard library ---
	58	#include <iomanip.h>
	59
	60	// --- AliRoot header files ---
	61	#include "AliRun.h"
	62	#include "AliEMCALDigit.h"
	63	#include "AliEMCALHit.h"
	64	#include "AliEMCALSDigitizer.h"
	65	#include "AliEMCALGeometry.h"
	66	#include "AliEMCALv1.h"
	67
	68	ClassImp(AliEMCALSDigitizer)
	69
	70
	71	//____________________________________________________________________________
	72	AliEMCALSDigitizer::AliEMCALSDigitizer():TTask("AliEMCALSDigitizer","")
	73	{
	74	// ctor
	75	fA = 0;
	76	fB = 10000000. ;
ffa6d63b	77	fPrimThreshold = 0.01 ;
61e0abb5	78	fNevents = 0 ;
	79	fSDigits = 0 ;
	80	fHits = 0 ;
	81	fIsInitialized = kFALSE ;
	82
	83	}
	84
	85	//____________________________________________________________________________
	86	AliEMCALSDigitizer::AliEMCALSDigitizer(const char* headerFile, const char *sDigitsTitle):TTask("AliEMCALSDigitizer","")
	87	{
	88	// ctor
	89	fA = 0;
	90	fB = 10000000.;
ffa6d63b	91	fPrimThreshold = 0.01 ;
61e0abb5	92	fNevents = 0 ;
	93	fSDigitsTitle = sDigitsTitle ;
	94	fHeadersFile = headerFile ;
	95	fSDigits = new TClonesArray("AliEMCALDigit",1000);
	96	fHits = new TClonesArray("AliEMCALHit",1000);
	97
	98	TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
	99
	100	//File was not opened yet
	101	if(file == 0){
	102	if(fHeadersFile.Contains("rfio"))
	103	file = TFile::Open(fHeadersFile,"update") ;
	104	else
	105	file = new TFile(fHeadersFile.Data(),"update") ;
	106	gAlice = (AliRun *) file->Get("gAlice") ;
	107	}
	108
	109	//add Task to //root/Tasks folder
	110	TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ;
	111	roottasks->Add(this) ;
	112
	113	fIsInitialized = kTRUE ;
	114	}
	115
	116	//____________________________________________________________________________
	117	AliEMCALSDigitizer::~AliEMCALSDigitizer()
	118	{
	119	// dtor
	120	if(fSDigits)
	121	delete fSDigits ;
	122	if(fHits)
	123	delete fHits ;
	124	}
	125	//____________________________________________________________________________
	126	void AliEMCALSDigitizer::Init(){
	127	//Initialization can not be done in the default constructor
	128
	129	if(!fIsInitialized){
	130
	131	if(fHeadersFile.IsNull())
	132	fHeadersFile="galice.root" ;
	133
	134	TFile * file = (TFile*) gROOT->GetFile(fHeadersFile.Data() ) ;
	135
	136	//if file was not opened yet, read gAlice
	137	if(file == 0){
	138	file = new TFile(fHeadersFile.Data(),"update") ;
	139	gAlice = (AliRun *) file->Get("gAlice") ;
	140	}
	141
	142	fHits = new TClonesArray("AliEMCALHit",1000);
	143	fSDigits = new TClonesArray("AliEMCALDigit",1000);
	144
	145	// add Task to //root/Tasks folder
	146	TTask * roottasks = (TTask*)gROOT->GetRootFolder()->FindObject("Tasks") ;
	147	roottasks->Add(this) ;
	148
	149	fIsInitialized = kTRUE ;
	150	}
	151	}
	152	//____________________________________________________________________________
	153	void AliEMCALSDigitizer::Exec(Option_t *option) {
	154	//Collects all hits in the same active volume into digit
	155
156	if(!fIsInitialized)
157	Init() ;
158
159	if(strstr(option,"tim"))
160	gBenchmark->Start("EMCALSDigitizer");
161
162	fNevents = (Int_t) gAlice->TreeE()->GetEntries() ;
163
164	Int_t ievent ;
165	for(ievent = 0; ievent < fNevents; ievent++){
166	gAlice->GetEvent(ievent) ;
167	gAlice->SetEvent(ievent) ;
168
169	if(gAlice->TreeH()==0){
170	cout << "AliEMCALSDigitizer: There is no Hit Tree" << endl;
171	return ;
172	}
173
174	//set address of the hits
175	TBranch * branch = gAlice->TreeH()->GetBranch("EMCAL");
176	if (branch)
177	branch->SetAddress(&fHits);
178	else{
179	cout << "ERROR in AliEMCALSDigitizer: "<< endl ;
180	cout << " no branch EMCAL in TreeH"<< endl ;
181	cout << " do nothing " << endl ;
182	return ;
183	}
184
185	fSDigits->Clear();
186	Int_t nSdigits = 0 ;
187
188
189	//Now made SDigits from hits, for EMCAL it is the same, so just copy
190	Int_t itrack ;
191	for (itrack=0; itrack < gAlice->GetNtrack(); itrack++){
192
193	//=========== Get the EMCAL branch from Hits Tree for the Primary track itrack
194	branch->GetEntry(itrack,0);
ffa6d63b	195	AliEMCALv0 * EMCAL = (AliEMCALv0 *) gAlice->GetDetector("EMCAL") ;
61e0abb5	196	AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance( EMCAL->GetGeometry()->GetName(), EMCAL->GetGeometry()->GetTitle() );
	197
	198	Int_t i;
	199	for ( i = 0 ; i < fHits->GetEntries() ; i++ ) {
	200	AliEMCALHit * hit = (AliEMCALHit*)fHits->At(i) ;
ffa6d63b	201	AliEMCALDigit * curSDigit = 0 ;
	202	AliEMCALDigit * sdigit ;
	203	Bool_t newsdigit = kTRUE;
	204	// Assign primary number only if contribution is significant
61e0abb5	205	if( hit->GetEnergy() > fPrimThreshold)
ffa6d63b	206	curSDigit = new AliEMCALDigit( hit->GetPrimary(), hit->GetIparent(), (((hit->GetId()/geom->GetNPhi())%geom->GetNZ()+1 ) * (hit->GetId()%(geom->GetNPhi()+1))), Digitize( hit->GetEnergy() ) ) ;
61e0abb5	207	else
ffa6d63b	208	curSDigit = new AliEMCALDigit( -1 , -1 ,(((hit->GetId()/geom->GetNPhi())%geom->GetNZ() + 1 ) * (hit->GetId()%(geom->GetNPhi()+1))), Digitize( hit->GetEnergy() ) ) ;
	209	cout << "Hit ID = " <<hit->GetId() << endl ;
	210	cout << "ID for detector = " << curSDigit->GetId() << endl ;
	211	cout << hit->GetEnergy() << " - hit energy - Digit Energy - " << curSDigit->GetAmp() << endl;
	212	for(Int_t check= 0; check < nSdigits ; check++) {
61e0abb5	213	sdigit = (AliEMCALDigit *)fSDigits->At(check);
ffa6d63b	214	if( sdigit->GetId() == curSDigit->GetId())
	215	{ cout << "SDigit - Get Amp " << sdigit->GetAmp() << endl ;
	216	sdigit = sdigit + *curSDigit ;
	217	newsdigit = kFALSE;
	218	cout << " and after addition " << sdigit->GetAmp() << endl ;
61e0abb5	219	}
ffa6d63b	220	}
	221	if (newsdigit)
	222	{ new((fSDigits)[nSdigits]) AliEMCALDigit(curSDigit);
	223	nSdigits++ ;
	224	cout << "Detector nsdigits = " << nSdigits << endl ; }
	225	newsdigit = kTRUE;
	226
61e0abb5	227
61e0abb5	228	if( hit->GetEnergy() > fPrimThreshold)
ffa6d63b	229	curSDigit = new AliEMCALDigit( hit->GetPrimary(), hit->GetIparent(), ((geom->GetNZ() * geom->GetNPhi()) + ((hit->GetId()/geom->GetNPhi())%geom->GetNZ() + 1) * (hit->GetId()%(geom->GetNPhi()+1))), Digitize( hit->GetEnergy() ) ) ;
61e0abb5	230	else
ffa6d63b	231	curSDigit = new AliEMCALDigit( -1 , -1 ,((geom->GetNZ() * geom->GetNPhi()) + ((hit->GetId()/geom->GetNPhi())%geom->GetNZ()+1) * (hit->GetId()%(geom->GetNPhi()+1))), Digitize( hit->GetEnergy() ) ) ;
61e0abb5	232
61e0abb5	233	if((hit->GetId()/geom->GetNPhi()) < (2*geom->GetNZ()))
ffa6d63b	234	{ cout << "ID for Preshower = " << curSDigit->GetId() << endl ;
61e0abb5	235	for(Int_t check= 0; check < nSdigits; check++) {
61e0abb5	236	sdigit = (AliEMCALDigit *)fSDigits->At(check);
ffa6d63b	237	if( sdigit->GetId() == curSDigit->GetId())
61e0abb5	238	{
ffa6d63b	239	sdigit = sdigit + *curSDigit ;
	240	newsdigit = kFALSE ;
	241	}
61e0abb5	242	}
ffa6d63b	243	if (newsdigit)
	244	{ new((fSDigits)[nSdigits]) AliEMCALDigit(curSDigit);
	245	nSdigits++ ;
	246	cout << "Preshower nsdigits = " << nSdigits << endl ;}
	247	newsdigit=kTRUE;
61e0abb5	248	}
	249	}
	250	} // loop over tracks
	251
	252	fSDigits->Sort() ;
	253
	254	nSdigits = fSDigits->GetEntriesFast() ;
	255	fSDigits->Expand(nSdigits) ;
	256
	257	Int_t i ;
	258	for (i = 0 ; i < nSdigits ; i++) {
	259	AliEMCALDigit * digit = (AliEMCALDigit *) fSDigits->At(i) ;
	260	digit->SetIndexInList(i) ;
	261	}
	262
	263	if(gAlice->TreeS() == 0)
	264	gAlice->MakeTree("S") ;
	265
	266	//check, if this branch already exits?
	267	TBranch * sdigitsBranch = 0;
	268	TBranch * sdigitizerBranch = 0;
	269
	270	TObjArray * branches = gAlice->TreeS()->GetListOfBranches() ;
	271	Int_t ibranch;
	272	Bool_t emcalNotFound = kTRUE ;
	273	Bool_t sdigitizerNotFound = kTRUE ;
	274
	275	for(ibranch = 0;ibranch <branches->GetEntries();ibranch++){
	276
	277	if(emcalNotFound){
	278	sdigitsBranch=(TBranch *) branches->At(ibranch) ;
	279	if( (strcmp("EMCAL",sdigitsBranch->GetName())==0 ) &&
	280	(fSDigitsTitle.CompareTo(sdigitsBranch->GetTitle()) == 0) )
	281	emcalNotFound = kFALSE ;
	282	}
	283	if(sdigitizerNotFound){
	284	sdigitizerBranch = (TBranch *) branches->At(ibranch) ;
	285	if( (strcmp(sdigitizerBranch->GetName(),"AliEMCALSDigitizer") == 0)&&
	286	(fSDigitsTitle.CompareTo(sdigitizerBranch->GetTitle()) == 0) )
	287	sdigitizerNotFound = kFALSE ;
	288	}
	289	}
	290
	291	if(!(sdigitizerNotFound && emcalNotFound)){
	292	cout << "AliEMCALSdigitizer error:" << endl ;
	293	cout << "Can not overwrite existing branches: do not write" << endl ;
	294	return ;
	295	}
	296
	297	//Make (if necessary) branches
	298	char * file =0;
	299	if(gSystem->Getenv("CONFIG_SPLIT_FILE")){ //generating file name
	300	file = new char[strlen(gAlice->GetBaseFile())+20] ;
	301	sprintf(file,"%s/EMCAL.SDigits.root",gAlice->GetBaseFile()) ;
	302	}
	303
	304	TDirectory *cwd = gDirectory;
	305
	306	//First list of sdigits
	307	Int_t bufferSize = 32000 ;
	308	sdigitsBranch = gAlice->TreeS()->Branch("EMCAL",&fSDigits,bufferSize);
	309	sdigitsBranch->SetTitle(fSDigitsTitle.Data());
	310	if (file) {
	311	sdigitsBranch->SetFile(file);
312	TIter next( sdigitsBranch->GetListOfBranches());
313	TBranch * subbr;
314	while ((subbr=(TBranch*)next())) {
315	subbr->SetFile(file);
316	}
317	cwd->cd();
318	}
319
320	//second - SDigitizer
321	Int_t splitlevel = 0 ;
322	AliEMCALSDigitizer * sd = this ;
323	sdigitizerBranch = gAlice->TreeS()->Branch("AliEMCALSDigitizer","AliEMCALSDigitizer",
324	&sd,bufferSize,splitlevel);
325	sdigitizerBranch->SetTitle(fSDigitsTitle.Data());
326	if (file) {
327	sdigitizerBranch->SetFile(file);
328	TIter next( sdigitizerBranch->GetListOfBranches());
329	TBranch * subbr ;
330	while ((subbr=(TBranch*)next())) {
331	subbr->SetFile(file);
332	}
333	cwd->cd();
334	delete file;
335	}
336
337	sdigitsBranch->Fill() ;
338	sdigitizerBranch->Fill() ;
339	gAlice->TreeS()->Write(0,TObject::kOverwrite) ;
340
341	if(strstr(option,"deb"))
342	PrintSDigits(option) ;
343
344	}
345
346	if(strstr(option,"tim")){
347	gBenchmark->Stop("EMCALSDigitizer");
348	cout << "AliEMCALSDigitizer:" << endl ;
349	cout << " took " << gBenchmark->GetCpuTime("EMCALSDigitizer") << " seconds for SDigitizing "
350	<< gBenchmark->GetCpuTime("EMCALSDigitizer")/fNevents << " seconds per event " << endl ;
351	cout << endl ;
352	}
353
354
355	}
356	//__________________________________________________________________
357	void AliEMCALSDigitizer::SetSDigitsBranch(const char * title ){
358	//Seting title to branch SDigits
359	if(!fSDigitsTitle.IsNull())
360	cout << "AliEMCALSdigitizer: changing SDigits file from " <<fSDigitsTitle.Data() << " to " << title << endl ;
361	fSDigitsTitle=title ;
362	}
363	//__________________________________________________________________
364	void AliEMCALSDigitizer::Print(Option_t* option)const{
365	cout << "------------------- "<< GetName() << " -------------" << endl ;
366	cout << " Writing SDigitis to branch with title " << fSDigitsTitle.Data() << endl ;
367	cout << " with digitization parameters A = " << fA << endl ;
368	cout << " B = " << fB << endl ;
369	cout << " Threshold for Primary assignment= " << fPrimThreshold << endl ;
370	cout << "---------------------------------------------------"<<endl ;
371
372	}
373	//__________________________________________________________________
374	Bool_t AliEMCALSDigitizer::operator==( AliEMCALSDigitizer const &sd )const{
375	if( (fA==sd.fA)&&(fB==sd.fB)&&(fPrimThreshold==sd.fPrimThreshold))
376	return kTRUE ;
377	else
378	return kFALSE ;
379	}
380	//__________________________________________________________________
381	void AliEMCALSDigitizer::PrintSDigits(Option_t * option){
382	//Prints list of digits produced at the current pass of AliEMCALDigitizer
383
384	cout << "AliEMCALSDigitizer: " << endl ;
385	cout << " Number of entries in SDigits list " << fSDigits->GetEntriesFast() << endl ;
386	cout << endl ;
387
388	if(strstr(option,"all")){// print all digits
389
390	//loop over digits
391	AliEMCALDigit * digit;
392	cout << "SDigit Id " << " Amplitude " << " Index " << " Nprim " << " Primaries list " << endl;
393	Int_t index ;
394	for (index = 0 ; index < fSDigits->GetEntries() ; index++) {
395	digit = (AliEMCALDigit * ) fSDigits->At(index) ;
396	cout << setw(8) << digit->GetId() << " " << setw(3) << digit->GetAmp() << " "
397	<< setw(6) << digit->GetIndexInList() << " "
398	<< setw(5) << digit->GetNprimary() <<" ";
399
400	Int_t iprimary;
401	for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++)
402	cout << setw(5) << digit->GetPrimary(iprimary+1) << " ";
403	cout << endl;
404	}
405
406	}
407	}