[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 
//
// JLK 26-Jun-2008 Added explanation:
// SDigits need to hold the energy sum of the hits, but AliEMCALDigit
// can (should) only store amplitude.  Therefore, the SDigit energy is
// "digitized" before being stored and must be "calibrated" back to an
// energy before SDigits are summed to form true Digits
//
// 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 <TBenchmark.h>
#include <TBrowser.h>
//#include <Riostream.h>
#include <TMath.h>
#include <TROOT.h>

// --- Standard library ---
#include "stdlib.h"

// --- AliRoot header files ---
#include "AliLog.h"
#include "AliRunLoader.h"
#include "AliStack.h"
#include "AliEMCALDigit.h"
#include "AliEMCALLoader.h"
#include "AliEMCALHit.h"
#include "AliEMCALSDigitizer.h"
#include "AliEMCALGeometry.h"
#include "AliEMCALSimParam.h"

ClassImp(AliEMCALSDigitizer)
           
//____________________________________________________________________________ 
AliEMCALSDigitizer::AliEMCALSDigitizer()
  : TTask("",""),
    fA(0.),fB(0.),fECPrimThreshold(0.),
    fDefaultInit(kTRUE),
    fEventFolderName(0),
    fInit(0),
    fSDigitsInRun(0),
    fFirstEvent(0),
    fLastEvent(0),
    fSampling(0.),
	fHits(0)
{
  // ctor
  InitParameters();
}

//____________________________________________________________________________ 
AliEMCALSDigitizer::AliEMCALSDigitizer(const char * alirunFileName, 
				       const char * eventFolderName)
  : TTask("EMCAL"+AliConfig::Instance()->GetSDigitizerTaskName(), alirunFileName),
    fA(0.),fB(0.),fECPrimThreshold(0.),
    fDefaultInit(kFALSE),
    fEventFolderName(eventFolderName),
    fInit(0),
    fSDigitsInRun(0),
    fFirstEvent(0),
    fLastEvent(0),
    fSampling(0.),
    fHits(0)
{
  // ctor
  Init();
  InitParameters() ; 

}


//____________________________________________________________________________ 
AliEMCALSDigitizer::AliEMCALSDigitizer(const AliEMCALSDigitizer & sd) 
  : TTask(sd.GetName(),sd.GetTitle()),
    fA(sd.fA),
    fB(sd.fB),
    fECPrimThreshold(sd.fECPrimThreshold),
    fDefaultInit(sd.fDefaultInit),
    fEventFolderName(sd.fEventFolderName),
    fInit(sd.fInit),
    fSDigitsInRun(sd.fSDigitsInRun),
    fFirstEvent(sd.fFirstEvent),
    fLastEvent(sd.fLastEvent),
    fSampling(sd.fSampling),
    fHits(0)
{
  //cpy ctor 
}


//____________________________________________________________________________ 
AliEMCALSDigitizer::~AliEMCALSDigitizer() {
  //dtor
  AliLoader *emcalLoader=0;
  if ((emcalLoader = AliRunLoader::Instance()->GetDetectorLoader("EMCAL")))
      emcalLoader->CleanSDigitizer();
	
  if(fHits){
	  fHits->Clear();
	  delete fHits;
  }
}

//____________________________________________________________________________ 
void AliEMCALSDigitizer::Init(){
  // Initialization: open root-file, allocate arrays for hits and sdigits,
  // attach task SDigitizer to the list of EMCAL tasks
  // 
  // Initialization can not be done in the default constructor
  //============================================================= YS
  //  The initialisation is now done by the getter

  fInit = kTRUE; 
   
  AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));

  if ( emcalLoader == 0 ) {
    Fatal("Init", "Could not obtain the AliEMCALLoader");
    return ;
  } 
  
  emcalLoader->PostSDigitizer(this);
  emcalLoader->GetSDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE);
  
}

//____________________________________________________________________________ 
void AliEMCALSDigitizer::InitParameters()
{
  //initialize parameters for sdigitization

  const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
  if (geom->GetSampling() == 0.) {
    Fatal("InitParameters", "Sampling factor not set !") ; 
  }

  // Get the parameters from the OCDB via the loader
  AliRunLoader *rl = AliRunLoader::Instance();
  AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
  AliEMCALSimParam * simParam = 0x0;
  if(emcalLoader) simParam = emcalLoader->SimulationParameters();
	
  if(!simParam){
	simParam = AliEMCALSimParam::GetInstance();
	AliWarning("Simulation Parameters not available in OCDB?");
  }
	
  //
  //JLK 26-Jun-2008 THIS SHOULD HAVE BEEN EXPLAINED AGES AGO:
  //
  //In order to be able to store SDigit Energy info into
  //AliEMCALDigit, we need to convert it temporarily to an ADC amplitude
  //and later when summing SDigits to form digits, convert it back to
  //energy.  These fA and fB parameters accomplish this through the
  //Digitize() and Calibrate() methods
  //
  // Initializes parameters
  fA         = simParam->GetA(); //0;
  fB         = simParam->GetB(); //1.e+6;  // Changed 24 Apr 2007. Dynamic range now 2 TeV
  fSampling  = geom->GetSampling();

  // threshold for deposit energy of hit
  fECPrimThreshold  = simParam->GetECPrimaryThreshold();//0.05;// GeV // 22-may-07 was 0// 24-nov-04 - was 1.e-6;
  
  AliDebug(2,Form("Print: \n------------------- %s -------------\n",GetName()));
  AliDebug(2,Form("   fInit                                 %i\n", int(fInit)));
  AliDebug(2,Form("   fFirstEvent                           %i\n", fFirstEvent));
  AliDebug(2,Form("   fLastEvent                            %i\n", fLastEvent));
  AliDebug(2,Form("   Writing SDigits to branch with title  %s\n", fEventFolderName.Data()));
  AliDebug(2,Form("   with digitization parameters       A = %f\n", fA));
  AliDebug(2,Form("                                      B = %f\n", fB));
  AliDebug(2,Form("   Threshold for EC Primary assignment  = %f\n", fECPrimThreshold));
  AliDebug(2,Form("   Sampling                             = %f\n", fSampling));
  AliDebug(2,Form("---------------------------------------------------\n"));

}

//____________________________________________________________________________
void AliEMCALSDigitizer::Exec(Option_t *option) 
{ 
	// Collects all hit of the same tower into digits
	TString o(option); o.ToUpper();
	if (strstr(option, "print") ) {
		
		AliDebug(2,Form("Print: \n------------------- %s -------------\n",GetName()));
		AliDebug(2,Form("   fInit                                 %i\n", int(fInit)));
		AliDebug(2,Form("   fFirstEvent                           %i\n", fFirstEvent));
		AliDebug(2,Form("   fLastEvent                            %i\n", fLastEvent));
		AliDebug(2,Form("   Writing SDigits to branch with title  %s\n", fEventFolderName.Data()));
		AliDebug(2,Form("   with digitization parameters       A = %f\n", fA));
		AliDebug(2,Form("                                      B = %f\n", fB));
		AliDebug(2,Form("   Threshold for EC Primary assignment  = %f\n", fECPrimThreshold));
		AliDebug(2,Form("   Sampling                             = %f\n", fSampling));
		AliDebug(2,Form("---------------------------------------------------\n"));
		
		return ; 
	}
	
	
	if(strstr(option,"tim"))
		gBenchmark->Start("EMCALSDigitizer");
	
	AliRunLoader *rl = AliRunLoader::Instance();
	AliEMCALLoader *emcalLoader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));
	
	//switch off reloading of this task while getting event
	if (!fInit) { // to prevent overwrite existing file
		AliError( Form("Give a version name different from %s", fEventFolderName.Data()) ) ;
		return ;
    }
	
	if (fLastEvent == -1) 
		fLastEvent = rl->GetNumberOfEvents() - 1 ;
	else {
		fLastEvent = TMath::Min(fLastEvent, rl->GetNumberOfEvents()-1);
	}
	Int_t nEvents   = fLastEvent - fFirstEvent + 1;
	
	Int_t ievent;
	Float_t energy=0.; // de * fSampling - 23-nov-04
	rl->LoadKinematics();
	rl->LoadHits("EMCAL");
	
	for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
		rl->GetEvent(ievent);
		TTree * treeS = emcalLoader->TreeS();
		if ( !treeS ) { 
			emcalLoader->MakeSDigitsContainer();
			treeS = emcalLoader->TreeS();
		}
		//TClonesArray * hits = emcalLoader->Hits() ; 
		TClonesArray * sdigits = emcalLoader->SDigits() ;
		sdigits->Clear();
		
		Int_t nSdigits = 0 ;
		Int_t iHit, iTrack, iSDigit;
		
		AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance(); 
		
		TTree *treeH = emcalLoader->TreeH();	
		if (treeH) {
			Int_t nTrack = treeH->GetEntries();  // TreeH has array of hits for every primary
			TBranch * branchH = treeH->GetBranch("EMCAL");
			//if(fHits)fHits->Clear();
			branchH->SetAddress(&fHits);
			for (iTrack = 0; iTrack < nTrack; iTrack++) {
				branchH->GetEntry(iTrack);
				Int_t nHit = fHits->GetEntriesFast();
				for(iHit = 0; iHit< nHit;iHit++){
					
					AliEMCALHit * hit = dynamic_cast<AliEMCALHit*>(fHits->At(iHit)) ;
					AliEMCALDigit * curSDigit = 0 ;
					AliEMCALDigit * sdigit = 0 ;
					Bool_t newsdigit = kTRUE; 
					
					// hit->GetId() - Absolute Id number EMCAL segment
					if(geom->CheckAbsCellId(hit->GetId())) { // was IsInECA(hit->GetId())
						energy = hit->GetEnergy() * fSampling; // 23-nov-04
						if(energy >  fECPrimThreshold )
							// Assign primary number only if deposited energy is significant
							curSDigit =  new AliEMCALDigit(hit->GetPrimary(),
														   hit->GetIparent(), hit->GetId(), 
														   Digitize(energy), hit->GetTime(),kFALSE,
														   -1, 0,0,energy ) ;
						else
							curSDigit =  new AliEMCALDigit(-1, 
														   -1,
														   hit->GetId(), 
														   Digitize(energy), hit->GetTime(),kFALSE,
														   -1, 0,0,energy ) ;
					} else {
						Warning("Exec"," abs id %i is bad \n", hit->GetId());
						newsdigit = kFALSE;
						curSDigit = 0;
					}
					
					if(curSDigit != 0){
						for(Int_t check= 0; check < nSdigits ; check++) {
							sdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(check)) ;
							
							if( sdigit->GetId() == curSDigit->GetId()) { // Are we in the same ECAL tower ?              
								*sdigit = *sdigit + *curSDigit;
								newsdigit = kFALSE;
							}
						}
					}
					if (newsdigit) {
						new((*sdigits)[nSdigits])  AliEMCALDigit(*curSDigit);
						nSdigits++ ;  
					}
					delete curSDigit ; 
				}  // loop over all hits (hit = deposited energy/entering particle)
				sdigits->Sort() ;
				
				nSdigits = sdigits->GetEntriesFast() ;
				fSDigitsInRun += nSdigits ;  
				
				for (iSDigit = 0 ; iSDigit < sdigits->GetEntriesFast() ; iSDigit++) { 
					AliEMCALDigit * sdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(iSDigit)) ;
					sdigit->SetIndexInList(iSDigit) ;
				}	
				if(fHits)fHits->Clear();
			}//track loop
		}// tree exists
		
		// Now write SDigits    
		
		Int_t bufferSize = 32000 ;    
		TBranch * sdigitsBranch = treeS->GetBranch("EMCAL");
		if (sdigitsBranch)
			sdigitsBranch->SetAddress(&sdigits);
		else
			treeS->Branch("EMCAL",&sdigits,bufferSize);
		
		treeS->Fill();
		
		emcalLoader->WriteSDigits("OVERWRITE");
		
		//NEXT - SDigitizer
		emcalLoader->WriteSDigitizer("OVERWRITE");  // why in event cycle ?
		
		if(strstr(option,"deb"))
			PrintSDigits(option) ;  
	}
	
	Unload();
	
	emcalLoader->GetSDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE);
	
	if(strstr(option,"tim")){
		gBenchmark->Stop("EMCALSDigitizer"); 
		printf("\n Exec: took %f seconds for SDigitizing %f seconds per event\n", 
			   gBenchmark->GetCpuTime("EMCALSDigitizer"), gBenchmark->GetCpuTime("EMCALSDigitizer")/nEvents ) ; 
	}
}

//__________________________________________________________________
Float_t AliEMCALSDigitizer::Digitize(Float_t energy)const {
  // Digitize the energy
  //
  //JLK 26-Jun-2008 EXPLANATION LONG OVERDUE:
  //
  //We have to digitize the SDigit energy so that it can be stored in
  //AliEMCALDigit, which has only an ADC amplitude member and
  //(rightly) no energy member.  This method converts the energy to an
  //integer which can be re-converted back to an energy with the
  //Calibrate(energy) method when it is time to create Digits from SDigits 
  //
  Double_t aSignal = fA + energy*fB;
  if (TMath::Abs(aSignal)>2147483647.0) { 
    //PH 2147483647 is the max. integer
    //PH This apparently is a problem which needs investigation
    AliWarning(Form("Too big or too small energy %f",aSignal));
    aSignal = TMath::Sign((Double_t)2147483647,aSignal);
  }

  return (Float_t ) aSignal;
}

//__________________________________________________________________
Float_t AliEMCALSDigitizer::Calibrate(Float_t amp)const {
  //
  // Convert the amplitude back to energy in GeV
  //
  //JLK 26-Jun-2008 EXPLANATION LONG OVERDUE:
  //
  //We have to digitize the SDigit energy with the method Digitize() 
  //so that it can be stored in AliEMCALDigit, which has only an ADC 
  //amplitude member and (rightly) no energy member.  This method is
  //just the reverse of Digitize(): it converts the stored amplitude 
  //back to an energy value in GeV so that the SDigit energies can be 
  //summed before adding noise and creating digits out of them
  //
  return (Float_t)(amp - fA)/fB;

}
 

//__________________________________________________________________
void AliEMCALSDigitizer::Print1(Option_t * option)
{
  Print(); 
  PrintSDigits(option);
}

//__________________________________________________________________
void AliEMCALSDigitizer::Print(Option_t *option) const
{ 
  // Prints parameters of SDigitizer
  printf("Print: \n------------------- %s ------------- option %s\n", GetName() , option) ; 
  printf("   fInit                                 %i\n", int(fInit));
  printf("   fFirstEvent                           %i\n", fFirstEvent);
  printf("   fLastEvent                            %i\n", fLastEvent);
  printf("   Writing SDigits to branch with title  %s\n", fEventFolderName.Data()) ;
  printf("   with digitization parameters       A = %f\n", fA) ; 
  printf("                                      B = %f\n", fB) ;
  printf("   Threshold for EC Primary assignment  = %f\n", fECPrimThreshold)  ;
  printf("   Sampling                             = %f\n", fSampling);
  printf("---------------------------------------------------\n") ;
}

//__________________________________________________________________
Bool_t AliEMCALSDigitizer::operator==( AliEMCALSDigitizer const &sd )const
{
  // Equal operator.
  // SDititizers are equal if their pedestal, slope and threshold are equal
  if( (fA==sd.fA)&&(fB==sd.fB)&&
      (fECPrimThreshold==sd.fECPrimThreshold))
    return kTRUE ;
  else
    return kFALSE ;
}

//__________________________________________________________________
void AliEMCALSDigitizer::PrintSDigits(Option_t * option)
{
  //Prints list of digits produced at the current pass of AliEMCALDigitizer
    
  AliEMCALLoader *rl = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
  const TClonesArray * sdigits = rl->SDigits() ; 
  
  printf("\n") ;  
  printf("event %i", rl->GetRunLoader()->GetEventNumber());
  printf(" Number of entries in SDigits list %i", sdigits->GetEntriesFast()); 
  if(strstr(option,"all")||strstr(option,"EMC")){
    
    //loop over digits
    AliEMCALDigit * digit;
    printf("\n   Id  Amplitude    Time          Index Nprim: Primaries list \n") ;    
	Int_t   index = 0;
    Float_t isum  = 0.;
    char * tempo = new char[8192]; 
    for (index = 0 ; index < sdigits->GetEntries() ; index++) {
      digit = dynamic_cast<AliEMCALDigit *>( sdigits->At(index) ) ;
      sprintf(tempo, "\n%6d  %8f    %6.5e %4d      %2d :",
	      digit->GetId(), digit->GetAmplitude(), digit->GetTime(), digit->GetIndexInList(), digit->GetNprimary()) ;  
      printf("%s",tempo);
      isum += digit->GetAmplitude();
      
      Int_t iprimary;
      for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++) {
		  sprintf(tempo, "%d ",digit->GetPrimary(iprimary+1) ) ; 
	printf("%s",tempo); 
      }  	 
    }
    delete tempo ;
    printf("\n** Sum %2.3f : %10.3f GeV/c **\n ", isum, Calibrate(isum));
  } else printf("\n");
}

//____________________________________________________________________________ 
void AliEMCALSDigitizer::Unload() const
{
  // Unload Hits and SDigits from the folder
  AliEMCALLoader *rl = dynamic_cast<AliEMCALLoader*>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
  rl->UnloadHits() ; 
  rl->UnloadSDigits() ; 
}

//____________________________________________________________________________ 
void AliEMCALSDigitizer::Browse(TBrowser* b)
{
  TTask::Browse(b);
}
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
ab6a174f	23	//
	24	// JLK 26-Jun-2008 Added explanation:
	25	// SDigits need to hold the energy sum of the hits, but AliEMCALDigit
	26	// can (should) only store amplitude. Therefore, the SDigit energy is
	27	// "digitized" before being stored and must be "calibrated" back to an
	28	// energy before SDigits are summed to form true Digits
	29	//
61e0abb5	30	// SDigits are written to TreeS, branch "EMCAL"
	31	// AliEMCALSDigitizer with all current parameters is written
	32	// to TreeS branch "AliEMCALSDigitizer".
	33	// Both branches have the same title. If necessary one can produce
	34	// another set of SDigits with different parameters. Two versions
	35	// can be distunguished using titles of the branches.
	36	// User case:
	37	// root [0] AliEMCALSDigitizer * s = new AliEMCALSDigitizer("galice.root")
	38	// Warning in <TDatabasePDG::TDatabasePDG>: object already instantiated
	39	// root [1] s->ExecuteTask()
	40	// // Makes SDigitis for all events stored in galice.root
	41	// root [2] s->SetPedestalParameter(0.001)
	42	// // One can change parameters of digitization
	43	// root [3] s->SetSDigitsBranch("Redestal 0.001")
	44	// // and write them into the new branch
	45	// root [4] s->ExeciteTask("deb all tim")
	46	// // available parameters:
	47	// deb - print # of produced SDigitis
	48	// deb all - print # and list of produced SDigits
	49	// tim - print benchmarking information
	50	//
ffa6d63b	51	//*-- Author : Sahal Yacoob (LBL)
ffa6d63b	52	// based on : AliPHOSSDigitzer
61e0abb5	53	//////////////////////////////////////////////////////////////////////////////
61e0abb5	54
61e0abb5	55	// --- ROOT system ---
bda7cf56	56	#include <TBenchmark.h>
bda7cf56	57	#include <TBrowser.h>
d804d556	58	//#include <Riostream.h>
bda7cf56	59	#include <TMath.h>
a1e17193	60	#include <TROOT.h>
05a92d59	61
61e0abb5	62	// --- Standard library ---
d64c959b	63	#include "stdlib.h"
61e0abb5	64
61e0abb5	65	// --- AliRoot header files ---
13e1db42	66	#include "AliLog.h"
5dee926e	67	#include "AliRunLoader.h"
5dee926e	68	#include "AliStack.h"
61e0abb5	69	#include "AliEMCALDigit.h"
5dee926e	70	#include "AliEMCALLoader.h"
05a92d59	71	#include "AliEMCALHit.h"
05a92d59	72	#include "AliEMCALSDigitizer.h"
88cb7938	73	#include "AliEMCALGeometry.h"
33a52e55	74	#include "AliEMCALSimParam.h"
61e0abb5	75
61e0abb5	76	ClassImp(AliEMCALSDigitizer)
61e0abb5	77
61e0abb5	78	//____________________________________________________________________________
18a21c7c	79	AliEMCALSDigitizer::AliEMCALSDigitizer()
	80	: TTask("",""),
	81	fA(0.),fB(0.),fECPrimThreshold(0.),
	82	fDefaultInit(kTRUE),
	83	fEventFolderName(0),
	84	fInit(0),
	85	fSDigitsInRun(0),
	86	fFirstEvent(0),
	87	fLastEvent(0),
e44d51bd	88	fSampling(0.),
e44d51bd	89	fHits(0)
61e0abb5	90	{
61e0abb5	91	// ctor
0a4cb131	92	InitParameters();
61e0abb5	93	}
	94
	95	//____________________________________________________________________________
e191bb57	96	AliEMCALSDigitizer::AliEMCALSDigitizer(const char * alirunFileName,
18a21c7c	97	const char * eventFolderName)
	98	: TTask("EMCAL"+AliConfig::Instance()->GetSDigitizerTaskName(), alirunFileName),
	99	fA(0.),fB(0.),fECPrimThreshold(0.),
	100	fDefaultInit(kFALSE),
	101	fEventFolderName(eventFolderName),
	102	fInit(0),
	103	fSDigitsInRun(0),
	104	fFirstEvent(0),
	105	fLastEvent(0),
e44d51bd	106	fSampling(0.),
e44d51bd	107	fHits(0)
61e0abb5	108	{
61e0abb5	109	// ctor
814ad4bf	110	Init();
62741b41	111	InitParameters() ;
7ea6391b	112
61e0abb5	113	}
61e0abb5	114
88cb7938	115
61e0abb5	116	//____________________________________________________________________________
18a21c7c	117	AliEMCALSDigitizer::AliEMCALSDigitizer(const AliEMCALSDigitizer & sd)
	118	: TTask(sd.GetName(),sd.GetTitle()),
	119	fA(sd.fA),
	120	fB(sd.fB),
	121	fECPrimThreshold(sd.fECPrimThreshold),
	122	fDefaultInit(sd.fDefaultInit),
	123	fEventFolderName(sd.fEventFolderName),
	124	fInit(sd.fInit),
	125	fSDigitsInRun(sd.fSDigitsInRun),
	126	fFirstEvent(sd.fFirstEvent),
	127	fLastEvent(sd.fLastEvent),
e44d51bd	128	fSampling(sd.fSampling),
e44d51bd	129	fHits(0)
18a21c7c	130	{
88cb7938	131	//cpy ctor
61e0abb5	132	}
36657114	133
88cb7938	134
797e311f	135	//____________________________________________________________________________
797e311f	136	AliEMCALSDigitizer::~AliEMCALSDigitizer() {
14ce0a6e	137	//dtor
5dee926e	138	AliLoader *emcalLoader=0;
33c3c91a	139	if ((emcalLoader = AliRunLoader::Instance()->GetDetectorLoader("EMCAL")))
5dee926e	140	emcalLoader->CleanSDigitizer();
e44d51bd	141
	142	if(fHits){
	143	fHits->Clear();
	144	delete fHits;
	145	}
797e311f	146	}
797e311f	147
61e0abb5	148	//____________________________________________________________________________
61e0abb5	149	void AliEMCALSDigitizer::Init(){
814ad4bf	150	// Initialization: open root-file, allocate arrays for hits and sdigits,
36657114	151	// attach task SDigitizer to the list of EMCAL tasks
814ad4bf	152	//
	153	// Initialization can not be done in the default constructor
	154	//============================================================= YS
	155	// The initialisation is now done by the getter
61e0abb5	156
dc7da436	157	fInit = kTRUE;
afa0c708	158
33c3c91a	159	AliEMCALLoader emcalLoader = dynamic_cast<AliEMCALLoader>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
5dee926e	160
	161	if ( emcalLoader == 0 ) {
	162	Fatal("Init", "Could not obtain the AliEMCALLoader");
814ad4bf	163	return ;
	164	}
	165
5dee926e	166	emcalLoader->PostSDigitizer(this);
5dee926e	167	emcalLoader->GetSDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE);
88cb7938	168
839828a6	169	}
	170
	171	//____________________________________________________________________________
afa0c708	172	void AliEMCALSDigitizer::InitParameters()
afa0c708	173	{
14ce0a6e	174	//initialize parameters for sdigitization
14ce0a6e	175
5dee926e	176	const AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
62741b41	177	if (geom->GetSampling() == 0.) {
5082063d	178	Fatal("InitParameters", "Sampling factor not set !") ;
62741b41	179	}
ab6a174f	180
6569f329	181	// Get the parameters from the OCDB via the loader
	182	AliRunLoader *rl = AliRunLoader::Instance();
	183	AliEMCALLoader emcalLoader = dynamic_cast<AliEMCALLoader>(rl->GetDetectorLoader("EMCAL"));
	184	AliEMCALSimParam * simParam = 0x0;
	185	if(emcalLoader) simParam = emcalLoader->SimulationParameters();
	186
	187	if(!simParam){
	188	simParam = AliEMCALSimParam::GetInstance();
	189	AliWarning("Simulation Parameters not available in OCDB?");
	190	}
	191
ab6a174f	192	//
	193	//JLK 26-Jun-2008 THIS SHOULD HAVE BEEN EXPLAINED AGES AGO:
	194	//
	195	//In order to be able to store SDigit Energy info into
	196	//AliEMCALDigit, we need to convert it temporarily to an ADC amplitude
	197	//and later when summing SDigits to form digits, convert it back to
	198	//energy. These fA and fB parameters accomplish this through the
	199	//Digitize() and Calibrate() methods
	200	//
1963b290	201	// Initializes parameters
6569f329	202	fA = simParam->GetA(); //0;
6569f329	203	fB = simParam->GetB(); //1.e+6; // Changed 24 Apr 2007. Dynamic range now 2 TeV
1963b290	204	fSampling = geom->GetSampling();
1963b290	205
ff98b189	206	// threshold for deposit energy of hit
6569f329	207	fECPrimThreshold = simParam->GetECPrimaryThreshold();//0.05;// GeV // 22-may-07 was 0// 24-nov-04 - was 1.e-6;
ff98b189	208
b42d4197	209	AliDebug(2,Form("Print: \n------------------- %s -------------\n",GetName()));
	210	AliDebug(2,Form(" fInit %i\n", int(fInit)));
	211	AliDebug(2,Form(" fFirstEvent %i\n", fFirstEvent));
	212	AliDebug(2,Form(" fLastEvent %i\n", fLastEvent));
	213	AliDebug(2,Form(" Writing SDigits to branch with title %s\n", fEventFolderName.Data()));
	214	AliDebug(2,Form(" with digitization parameters A = %f\n", fA));
	215	AliDebug(2,Form(" B = %f\n", fB));
	216	AliDebug(2,Form(" Threshold for EC Primary assignment = %f\n", fECPrimThreshold));
	217	AliDebug(2,Form(" Sampling = %f\n", fSampling));
	218	AliDebug(2,Form("---------------------------------------------------\n"));
	219
839828a6	220	}
839828a6	221
61e0abb5	222	//____________________________________________________________________________
afa0c708	223	void AliEMCALSDigitizer::Exec(Option_t *option)
afa0c708	224	{
e44d51bd	225	// Collects all hit of the same tower into digits
	226	TString o(option); o.ToUpper();
	227	if (strstr(option, "print") ) {
	228
	229	AliDebug(2,Form("Print: \n------------------- %s -------------\n",GetName()));
	230	AliDebug(2,Form(" fInit %i\n", int(fInit)));
	231	AliDebug(2,Form(" fFirstEvent %i\n", fFirstEvent));
	232	AliDebug(2,Form(" fLastEvent %i\n", fLastEvent));
	233	AliDebug(2,Form(" Writing SDigits to branch with title %s\n", fEventFolderName.Data()));
	234	AliDebug(2,Form(" with digitization parameters A = %f\n", fA));
	235	AliDebug(2,Form(" B = %f\n", fB));
	236	AliDebug(2,Form(" Threshold for EC Primary assignment = %f\n", fECPrimThreshold));
	237	AliDebug(2,Form(" Sampling = %f\n", fSampling));
	238	AliDebug(2,Form("---------------------------------------------------\n"));
	239
	240	return ;
afa0c708	241	}
e44d51bd	242
	243
	244	if(strstr(option,"tim"))
	245	gBenchmark->Start("EMCALSDigitizer");
	246
	247	AliRunLoader *rl = AliRunLoader::Instance();
	248	AliEMCALLoader emcalLoader = dynamic_cast<AliEMCALLoader>(rl->GetDetectorLoader("EMCAL"));
	249
	250	//switch off reloading of this task while getting event
	251	if (!fInit) { // to prevent overwrite existing file
	252	AliError( Form("Give a version name different from %s", fEventFolderName.Data()) ) ;
	253	return ;
62741b41	254	}
e44d51bd	255
	256	if (fLastEvent == -1)
	257	fLastEvent = rl->GetNumberOfEvents() - 1 ;
	258	else {
	259	fLastEvent = TMath::Min(fLastEvent, rl->GetNumberOfEvents()-1);
	260	}
	261	Int_t nEvents = fLastEvent - fFirstEvent + 1;
	262
	263	Int_t ievent;
	264	Float_t energy=0.; // de * fSampling - 23-nov-04
	265	rl->LoadKinematics();
	266	rl->LoadHits("EMCAL");
	267
	268	for (ievent = fFirstEvent; ievent <= fLastEvent; ievent++) {
	269	rl->GetEvent(ievent);
	270	TTree * treeS = emcalLoader->TreeS();
	271	if ( !treeS ) {
	272	emcalLoader->MakeSDigitsContainer();
	273	treeS = emcalLoader->TreeS();
	274	}
	275	//TClonesArray * hits = emcalLoader->Hits() ;
	276	TClonesArray * sdigits = emcalLoader->SDigits() ;
	277	sdigits->Clear();
	278
	279	Int_t nSdigits = 0 ;
	280	Int_t iHit, iTrack, iSDigit;
	281
	282	AliEMCALGeometry *geom = AliEMCALGeometry::GetInstance();
	283
	284	TTree *treeH = emcalLoader->TreeH();
	285	if (treeH) {
	286	Int_t nTrack = treeH->GetEntries(); // TreeH has array of hits for every primary
	287	TBranch * branchH = treeH->GetBranch("EMCAL");
	288	//if(fHits)fHits->Clear();
	289	branchH->SetAddress(&fHits);
	290	for (iTrack = 0; iTrack < nTrack; iTrack++) {
	291	branchH->GetEntry(iTrack);
	292	Int_t nHit = fHits->GetEntriesFast();
	293	for(iHit = 0; iHit< nHit;iHit++){
	294
	295	AliEMCALHit * hit = dynamic_cast<AliEMCALHit*>(fHits->At(iHit)) ;
	296	AliEMCALDigit * curSDigit = 0 ;
	297	AliEMCALDigit * sdigit = 0 ;
	298	Bool_t newsdigit = kTRUE;
	299
	300	// hit->GetId() - Absolute Id number EMCAL segment
	301	if(geom->CheckAbsCellId(hit->GetId())) { // was IsInECA(hit->GetId())
	302	energy = hit->GetEnergy() * fSampling; // 23-nov-04
	303	if(energy > fECPrimThreshold )
	304	// Assign primary number only if deposited energy is significant
	305	curSDigit = new AliEMCALDigit(hit->GetPrimary(),
	306	hit->GetIparent(), hit->GetId(),
	307	Digitize(energy), hit->GetTime(),kFALSE,
	308	-1, 0,0,energy ) ;
	309	else
	310	curSDigit = new AliEMCALDigit(-1,
	311	-1,
	312	hit->GetId(),
	313	Digitize(energy), hit->GetTime(),kFALSE,
	314	-1, 0,0,energy ) ;
	315	} else {
	316	Warning("Exec"," abs id %i is bad \n", hit->GetId());
	317	newsdigit = kFALSE;
	318	curSDigit = 0;
319	}
320
321	if(curSDigit != 0){
322	for(Int_t check= 0; check < nSdigits ; check++) {
323	sdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(check)) ;
324
325	if( sdigit->GetId() == curSDigit->GetId()) { // Are we in the same ECAL tower ?
326	sdigit = sdigit + *curSDigit;
327	newsdigit = kFALSE;
328	}
329	}
330	}
331	if (newsdigit) {
332	new((sdigits)[nSdigits]) AliEMCALDigit(curSDigit);
333	nSdigits++ ;
334	}
335	delete curSDigit ;
336	} // loop over all hits (hit = deposited energy/entering particle)
337	sdigits->Sort() ;
338
339	nSdigits = sdigits->GetEntriesFast() ;
340	fSDigitsInRun += nSdigits ;
341
342	for (iSDigit = 0 ; iSDigit < sdigits->GetEntriesFast() ; iSDigit++) {
343	AliEMCALDigit * sdigit = dynamic_cast<AliEMCALDigit *>(sdigits->At(iSDigit)) ;
344	sdigit->SetIndexInList(iSDigit) ;
345	}
346	if(fHits)fHits->Clear();
347	}//track loop
348	}// tree exists
349
350	// Now write SDigits
351
352	Int_t bufferSize = 32000 ;
353	TBranch * sdigitsBranch = treeS->GetBranch("EMCAL");
354	if (sdigitsBranch)
355	sdigitsBranch->SetAddress(&sdigits);
356	else
357	treeS->Branch("EMCAL",&sdigits,bufferSize);
358
359	treeS->Fill();
360
361	emcalLoader->WriteSDigits("OVERWRITE");
362
363	//NEXT - SDigitizer
364	emcalLoader->WriteSDigitizer("OVERWRITE"); // why in event cycle ?
365
366	if(strstr(option,"deb"))
367	PrintSDigits(option) ;
368	}
369
370	Unload();
371
372	emcalLoader->GetSDigitsDataLoader()->GetBaseTaskLoader()->SetDoNotReload(kTRUE);
373
374	if(strstr(option,"tim")){
375	gBenchmark->Stop("EMCALSDigitizer");
376	printf("\n Exec: took %f seconds for SDigitizing %f seconds per event\n",
377	gBenchmark->GetCpuTime("EMCALSDigitizer"), gBenchmark->GetCpuTime("EMCALSDigitizer")/nEvents ) ;
378	}
61e0abb5	379	}
05a92d59	380
bda7cf56	381	//__________________________________________________________________
829ba234	382	Float_t AliEMCALSDigitizer::Digitize(Float_t energy)const {
bda7cf56	383	// Digitize the energy
ab6a174f	384	//
	385	//JLK 26-Jun-2008 EXPLANATION LONG OVERDUE:
	386	//
	387	//We have to digitize the SDigit energy so that it can be stored in
	388	//AliEMCALDigit, which has only an ADC amplitude member and
	389	//(rightly) no energy member. This method converts the energy to an
	390	//integer which can be re-converted back to an energy with the
	391	//Calibrate(energy) method when it is time to create Digits from SDigits
	392	//
	393	Double_t aSignal = fA + energy*fB;
	394	if (TMath::Abs(aSignal)>2147483647.0) {
	395	//PH 2147483647 is the max. integer
	396	//PH This apparently is a problem which needs investigation
	397	AliWarning(Form("Too big or too small energy %f",aSignal));
	398	aSignal = TMath::Sign((Double_t)2147483647,aSignal);
bda7cf56	399	}
829ba234	400
829ba234	401	return (Float_t ) aSignal;
ab6a174f	402	}
bda7cf56	403
bda7cf56	404	//__________________________________________________________________
829ba234	405	Float_t AliEMCALSDigitizer::Calibrate(Float_t amp)const {
ab6a174f	406	//
	407	// Convert the amplitude back to energy in GeV
	408	//
	409	//JLK 26-Jun-2008 EXPLANATION LONG OVERDUE:
	410	//
	411	//We have to digitize the SDigit energy with the method Digitize()
	412	//so that it can be stored in AliEMCALDigit, which has only an ADC
	413	//amplitude member and (rightly) no energy member. This method is
	414	//just the reverse of Digitize(): it converts the stored amplitude
	415	//back to an energy value in GeV so that the SDigit energies can be
	416	//summed before adding noise and creating digits out of them
	417	//
	418	return (Float_t)(amp - fA)/fB;
	419
	420	}
	421
106fc2fa	422
ab6a174f	423	//__________________________________________________________________
1963b290	424	void AliEMCALSDigitizer::Print1(Option_t * option)
	425	{
	426	Print();
	427	PrintSDigits(option);
	428	}
	429
61e0abb5	430	//__________________________________________________________________
5dee926e	431	void AliEMCALSDigitizer::Print(Option_t *option) const
05a92d59	432	{
05a92d59	433	// Prints parameters of SDigitizer
e52475ed	434	printf("Print: \n------------------- %s ------------- option %s\n", GetName() , option) ;
1963b290	435	printf(" fInit %i\n", int(fInit));
	436	printf(" fFirstEvent %i\n", fFirstEvent);
	437	printf(" fLastEvent %i\n", fLastEvent);
88cb7938	438	printf(" Writing SDigits to branch with title %s\n", fEventFolderName.Data()) ;
1963b290	439	printf(" with digitization parameters A = %f\n", fA) ;
	440	printf(" B = %f\n", fB) ;
	441	printf(" Threshold for EC Primary assignment = %f\n", fECPrimThreshold) ;
	442	printf(" Sampling = %f\n", fSampling);
88cb7938	443	printf("---------------------------------------------------\n") ;
61e0abb5	444	}
05a92d59	445
61e0abb5	446	//__________________________________________________________________
05a92d59	447	Bool_t AliEMCALSDigitizer::operator==( AliEMCALSDigitizer const &sd )const
	448	{
	449	// Equal operator.
	450	// SDititizers are equal if their pedestal, slope and threshold are equal
89e103bd	451	if( (fA==sd.fA)&&(fB==sd.fB)&&
fdebddeb	452	(fECPrimThreshold==sd.fECPrimThreshold))
61e0abb5	453	return kTRUE ;
	454	else
	455	return kFALSE ;
	456	}
173558f2	457
61e0abb5	458	//__________________________________________________________________
d64c959b	459	void AliEMCALSDigitizer::PrintSDigits(Option_t * option)
d64c959b	460	{
61e0abb5	461	//Prints list of digits produced at the current pass of AliEMCALDigitizer
7ea6391b	462
33c3c91a	463	AliEMCALLoader rl = dynamic_cast<AliEMCALLoader>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
5dee926e	464	const TClonesArray * sdigits = rl->SDigits() ;
61e0abb5	465
fdebddeb	466	printf("\n") ;
5dee926e	467	printf("event %i", rl->GetRunLoader()->GetEventNumber());
1963b290	468	printf(" Number of entries in SDigits list %i", sdigits->GetEntriesFast());
814ad4bf	469	if(strstr(option,"all")\|\|strstr(option,"EMC")){
9859bfc0	470
61e0abb5	471	//loop over digits
61e0abb5	472	AliEMCALDigit * digit;
fdebddeb	473	printf("\n Id Amplitude Time Index Nprim: Primaries list \n") ;
829ba234	474	Int_t index = 0;
829ba234	475	Float_t isum = 0.;
11f9c5ff	476	char * tempo = new char[8192];
814ad4bf	477	for (index = 0 ; index < sdigits->GetEntries() ; index++) {
05a92d59	478	digit = dynamic_cast<AliEMCALDigit *>( sdigits->At(index) ) ;
829ba234	479	sprintf(tempo, "\n%6d %8f %6.5e %4d %2d :",
829ba234	480	digit->GetId(), digit->GetAmplitude(), digit->GetTime(), digit->GetIndexInList(), digit->GetNprimary()) ;
d804d556	481	printf("%s",tempo);
829ba234	482	isum += digit->GetAmplitude();
61e0abb5	483
61e0abb5	484	Int_t iprimary;
9859bfc0	485	for (iprimary=0; iprimary<digit->GetNprimary(); iprimary++) {
d804d556	486	sprintf(tempo, "%d ",digit->GetPrimary(iprimary+1) ) ;
d804d556	487	printf("%s",tempo);
9859bfc0	488	}
61e0abb5	489	}
e44d51bd	490	delete tempo ;
829ba234	491	printf("\n Sum %2.3f : %10.3f GeV/c \n ", isum, Calibrate(isum));
1963b290	492	} else printf("\n");
61e0abb5	493	}
05a92d59	494
05a92d59	495	//____________________________________________________________________________
88cb7938	496	void AliEMCALSDigitizer::Unload() const
05a92d59	497	{
d64c959b	498	// Unload Hits and SDigits from the folder
33c3c91a	499	AliEMCALLoader rl = dynamic_cast<AliEMCALLoader>(AliRunLoader::Instance()->GetDetectorLoader("EMCAL"));
5dee926e	500	rl->UnloadHits() ;
5dee926e	501	rl->UnloadSDigits() ;
05a92d59	502	}
1963b290	503
fe93d365	504	//____________________________________________________________________________
1963b290	505	void AliEMCALSDigitizer::Browse(TBrowser* b)
1963b290	506	{
1963b290	507	TTask::Browse(b);
1963b290	508	}