[u/mrichter/AliRoot.git] / RICH / AliRICHMerger.cxx

/**************************************************************************
 * Copyright(c) 1998-2000, 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.                  *
 **************************************************************************/

/*
$Log$
Revision 1.5  2001/10/23 13:03:35  hristov
The access to several data members was changed from public to protected. The digitisation was adapted to the multi-event case (J.Chudoba)

Revision 1.4  2001/10/21 18:31:24  hristov
Several pointers were set to zero in the default constructors to avoid memory management problems

Revision 1.3  2001/05/16 14:57:20  alibrary
New files for folders and Stack

Revision 1.2  2001/03/14 18:16:08  jbarbosa
Corrected bug (more to correct).
File "points.dat" is no longer created.

Revision 1.1  2001/02/27 22:13:34  jbarbosa
Implementing merger class.

*/
#include <iostream> 

#include <TTree.h> 
#include <TObjArray.h>
#include <TFile.h>
#include <TDirectory.h>
#include <TParticle.h>

#include "AliRICHMerger.h"
#include "AliRICHChamber.h"
#include "AliHitMap.h"
#include "AliRICHHitMapA1.h"
#include "AliRICH.h"
#include "AliRICHHit.h"
#include "AliRICHSDigit.h"
#include "AliRICHDigit.h"
#include "AliRICHTransientDigit.h"
#include "AliRun.h"
#include "AliPDG.h"

ClassImp(AliRICHMerger)

//___________________________________________
  AliRICHMerger::AliRICHMerger()
{
// Default constructor    
  fEvNrSig = 0;
  fEvNrBgr = 0;
  fMerge   = kDigitize;
  fFnBgr   = 0;
  fHitMap  = 0;
  fList    = 0;
  fTrH1    = 0;
  fHitsBgr = 0;
  fSDigitsBgr = 0;
  fHitMap     = 0;
  fList       = 0;
  fBgrFile    = 0;
}

//------------------------------------------------------------------------
AliRICHMerger::~AliRICHMerger()
{
// Destructor
  if (fTrH1)       delete fTrH1;
  if (fHitsBgr)    delete fHitsBgr;
  if (fSDigitsBgr) delete fSDigitsBgr;
  if (fHitMap)     delete fHitMap;
  if (fList)       delete fList;
  if (fBgrFile)    delete fBgrFile;
}

//------------------------------------------------------------------------
Bool_t AliRICHMerger::Exists(const AliRICHSDigit *padhit)
{
  return (fHitMap[fNch]->TestHit(padhit->PadX(),padhit->PadY()));
}

//------------------------------------------------------------------------
void AliRICHMerger::Update(AliRICHSDigit *padhit)
{
  AliRICHTransientDigit *pdigit = 
    static_cast<AliRICHTransientDigit*>(
      fHitMap[fNch]->GetHit(padhit->PadX(),padhit->PadY()));

  // update charge
  //
  Int_t iqpad    = Int_t(padhit->QPad()); // charge per pad
  pdigit->AddSignal(iqpad);
  pdigit->AddPhysicsSignal(iqpad);		

  // update list of tracks
  //
  Int_t track, charge;    
  if (fSignal) {
    track = fTrack;
    charge = iqpad;
  } else {
    track = kBgTag;
    charge = kBgTag;
  }
  pdigit->UpdateTrackList(track,charge);
}

//------------------------------------------------------------------------
void AliRICHMerger::CreateNew(AliRICHSDigit *padhit)
{
  fList->AddAtAndExpand(
    new AliRICHTransientDigit(fNch,fDigits),fCounter);
  fHitMap[fNch]->SetHit(padhit->PadX(),padhit->PadY(),fCounter);

  AliRICHTransientDigit* pdigit = 
    static_cast<AliRICHTransientDigit*>(fList->Last());
  // list of tracks
  Int_t track, charge;
  if (fSignal) {
    track = fTrack;
    charge = padhit->QPad();
  } else {
    track = kBgTag;
    charge = kBgTag;
  }
  pdigit->AddToTrackList(track,charge);
  fCounter++;
}


//------------------------------------------------------------------------
void AliRICHMerger::Init()
{
// Initialisation
    
  if (fMerge && !fBgrFile) fBgrFile = InitBgr();
}


//------------------------------------------------------------------------
TFile* AliRICHMerger::InitBgr()
{
// Initialise background event
  TFile *file = new TFile(fFnBgr);
// add error checking later
  printf("\n AliRICHMerger has opened %s file with background event \n", fFnBgr);
  fHitsBgr     = new TClonesArray("AliRICHHit",1000);
  fSDigitsBgr  = new TClonesArray("AliRICHSDigit",1000);
  return file;
}

//------------------------------------------------------------------------
void AliRICHMerger::Digitise(Int_t nev, Int_t flag)
{

  // keep galice.root for signal and name differently the file for 
  // background when add! otherwise the track info for signal will be lost !

  Int_t particle;

  AliRICHChamber*       iChamber;
  AliSegmentation*  segmentation;
  
  fList = new TObjArray;
    
  AliRICH *pRICH = (AliRICH *) gAlice->GetDetector("RICH");
  fHitMap= new AliHitMap* [kNCH];
    
  if (fMerge ) {
    fBgrFile->cd();
    //
    // Get Hits Tree header from file
    if(fHitsBgr) fHitsBgr->Clear();
    if(fSDigitsBgr) fSDigitsBgr->Clear();
    if(fTrH1) delete fTrH1;
    fTrH1 = 0;
      
    char treeName[20];
    sprintf(treeName,"TreeH%d",fEvNrBgr);
    fTrH1 = (TTree*)gDirectory->Get(treeName);
    if (!fTrH1) {
      printf("ERROR: cannot find Hits Tree for event:%d\n",fEvNrBgr);
    }
    //
    // Set branch addresses
    TBranch *branch;
    char branchname[20];
    sprintf(branchname,"%s",pRICH->GetName());
    if (fTrH1 && fHitsBgr) {
      branch = fTrH1->GetBranch(branchname);
      if (branch) branch->SetAddress(&fHitsBgr);
    }
    if (fTrH1 && fSDigitsBgr) {
      branch = fTrH1->GetBranch("RICHSDigits");
      if (branch) branch->SetAddress(&fSDigitsBgr);
    }
  }
    
  for (Int_t i =0; i<kNCH; i++) {
    iChamber= &(pRICH->Chamber(i));
    segmentation=iChamber->GetSegmentationModel(1);
    fHitMap[i] = new AliRICHHitMapA1(segmentation, fList);
  }
  //
  //   Loop over tracks
  //
    
  fSignal = kTRUE;
  fCounter = 0;
  TTree *treeH = gAlice->TreeH();
  Int_t ntracks =(Int_t) treeH->GetEntries();
  for (fTrack=0; fTrack<ntracks; fTrack++) {
    gAlice->ResetHits();
    treeH->GetEvent(fTrack);
    //
    //   Loop over hits
    for(AliRICHHit* mHit=(AliRICHHit*)pRICH->FirstHit(-1); 
	mHit;
	mHit=(AliRICHHit*)pRICH->NextHit()) 
    {
	  
      fNch = mHit->Chamber()-1;  // chamber number
      Int_t trackIndex = mHit->Track();
      if (fNch >= kNCH) {
	cerr<<"AliRICHMerger: chamber nr. fNch out of range: "<<fNch<<endl;
	cerr<<"               track: "<<fTrack<<endl;
	continue;
      }
      iChamber = &(pRICH->Chamber(fNch));
	  

// 
// If flag is set, create digits only for some particles
//
      TParticle *current = (TParticle*)gAlice->Particle(trackIndex);
      if (current->GetPdgCode() >= 50000050)
      {
	TParticle *motherofcurrent = (TParticle*)gAlice->Particle(current->GetFirstMother());
	particle = motherofcurrent->GetPdgCode();
      }
      else
      {
	particle = current->GetPdgCode();
      }

	  
      //printf("Flag:%d\n",flag);
      //printf("Track:%d\n",track);
      //printf("Particle:%d\n",particle);
	  
      Int_t digitise=1;
	  
      if (flag == 1) 
	if(TMath::Abs(particle)==211 || TMath::Abs(particle)==111)
	  digitise=0;
	  
      if (flag == 2)
	if(TMath::Abs(particle)==321 || TMath::Abs(particle)==130 || TMath::Abs(particle)==310 
	   || TMath::Abs(particle)==311)
	  digitise=0;
	  
      if (flag == 3 && TMath::Abs(particle)==2212)
	digitise=0;
	  
      if (flag == 4 && TMath::Abs(particle)==13)
	digitise=0;
	  
      if (flag == 5 && TMath::Abs(particle)==11)
	digitise=0;
	  
      if (flag == 6 && TMath::Abs(particle)==2112)
	digitise=0;
	  
	  
      //printf ("Particle: %d, Flag: %d, Digitise: %d\n",particle,flag,digitise); 
	  
	  
      if (digitise)
      {
	      
	//
	// Loop over pad hits
	for (AliRICHSDigit* mPad=
	       (AliRICHSDigit*)pRICH->FirstPad(mHit,pRICH->SDigits());
	     mPad;
	     mPad=(AliRICHSDigit*)pRICH->NextPad(pRICH->SDigits()))
	{
	  Int_t iqpad    = mPad->QPad();       // charge per pad
	  fDigits[0]=mPad->PadX();
	  fDigits[1]=mPad->PadY();
	  fDigits[2]=iqpad;
	  fDigits[3]=iqpad;
	  fDigits[4]=mPad->HitNumber();
		  
	  // build the list of fired pads and update the info
	  if (Exists(mPad)) {
	    Update(mPad);
	  } else {
	    CreateNew(mPad);
	  }
	} //end loop over clusters
      }// track type condition
    } // hit loop
  } // track loop
    
  // open the file with background
    
  if (fMerge) {
    fSignal = kFALSE;
    ntracks = (Int_t)fTrH1->GetEntries();
    //
    //   Loop over tracks
    //
    for (fTrack = 0; fTrack < ntracks; fTrack++) {
	
      if (fHitsBgr)       fHitsBgr->Clear();
      if (fSDigitsBgr)    fSDigitsBgr->Clear();
	
      fTrH1->GetEvent(fTrack);
      //
      //   Loop over hits
      AliRICHHit* mHit;
      for(Int_t i = 0; i < fHitsBgr->GetEntriesFast(); ++i) 
      {	
	mHit   = (AliRICHHit*) (*fHitsBgr)[i];
	fNch   = mHit->Chamber()-1;  // chamber number
	iChamber = &(pRICH->Chamber(fNch));

	//
	// Loop over pad hits
	for (AliRICHSDigit* mPad =
	       (AliRICHSDigit*)pRICH->FirstPad(mHit,fSDigitsBgr);
	     mPad;
	     mPad = (AliRICHSDigit*)pRICH->NextPad(fSDigitsBgr))
	{
	  fDigits[0] = mPad->PadX(); 
	  fDigits[1] = mPad->PadY();  
	  fDigits[2] = mPad->QPad();
	  fDigits[3] = 0;
	  fDigits[4] = -1; // set hit number to -1 for bgr
		
	  // build the list of fired pads and update the info
	  if (!Exists(mPad)) {
	    CreateNew(mPad);
	  } else {
	    Update(mPad);
	  } //  end if !Exists
	} //end loop over clusters
      } // hit loop
    } // track loop
      
    TTree *treeK = gAlice->TreeK();
    TFile *file = NULL;
      
    if (treeK) file = treeK->GetCurrentFile();
    file->cd();
  } // if fMerge
    
  Int_t tracks[kMAXTRACKSPERRICHDIGIT];
  Int_t charges[kMAXTRACKSPERRICHDIGIT];
  Int_t nentries=fList->GetEntriesFast();
    
  for (Int_t nent=0;nent<nentries;nent++) {
    AliRICHTransientDigit *transDigit=(AliRICHTransientDigit*)fList->At(nent);
    if (transDigit==0) continue; 
    Int_t ich=transDigit->GetChamber();
    Int_t q=transDigit->Signal(); 
    iChamber=&(pRICH->Chamber(ich));
    AliRICHResponse * response=iChamber->GetResponseModel();
    Int_t adcmax= (Int_t) response->MaxAdc();
      
      
    // add white noise and do zero-suppression and signal truncation (new electronics,old electronics gaus 1.2,0.2)
    //printf("Treshold: %d\n",iChamber->fTresh->GetHitIndex(transDigit->PadX(),transDigit->PadY()));
    Int_t pedestal = iChamber->fTresh->GetHitIndex(transDigit->PadX(),transDigit->PadY());

    //printf("Pedestal:%d\n",pedestal);
    //Int_t pedestal=0;
    Float_t treshold = (pedestal + 4*2.2);
      
    Float_t meanNoise = gRandom->Gaus(2.2, 0.3);
    Float_t noise     = gRandom->Gaus(0, meanNoise);
    q+=(Int_t)(noise + pedestal);
    //q+=(Int_t)(noise);
    //          magic number to be parametrised !!! 
    if ( q <= treshold) 
    {
      q = q - pedestal;
      continue;
    }
    q = q - pedestal;
    if ( q >= adcmax) q=adcmax;
    fDigits[0]=transDigit->PadX();
    fDigits[1]=transDigit->PadY();
    fDigits[2]=q;
    fDigits[3]=transDigit->Physics();
    fDigits[4]=transDigit->Hit();

    Int_t nptracks = transDigit->GetNTracks();  

    // this was changed to accomodate the real number of tracks
    if (nptracks > kMAXTRACKSPERRICHDIGIT) {
      printf("Attention - tracks > 10 %d\n",nptracks);
      nptracks=kMAXTRACKSPERRICHDIGIT;
    }
    if (nptracks > 2) {
      printf("Attention - tracks > 2  %d \n",nptracks);
      //printf("cat,ich,ix,iy,q %d %d %d %d %d \n",
      //icat,ich,digits[0],digits[1],q);
    }
    for (Int_t tr=0;tr<nptracks;tr++) {
      tracks[tr]=transDigit->GetTrack(tr);
      charges[tr]=transDigit->GetCharge(tr);
    }      //end loop over list of tracks for one pad
    if (nptracks < kMAXTRACKSPERRICHDIGIT ) {
      for (Int_t t=nptracks; t<kMAXTRACKSPERRICHDIGIT; t++) {
	tracks[t]=0;
	charges[t]=0;
      }
    }
    //write file
    //if (ich==2)
    //fprintf(points,"%4d,      %4d,      %4d\n",digits[0],digits[1],digits[2]);
      
    // fill digits
    pRICH->AddDigits(ich,tracks,charges,fDigits);
  }	
  gAlice->TreeD()->Fill();

  fList->Delete();
  for(Int_t ii=0;ii<kNCH;++ii) {
    if (fHitMap[ii]) {
      delete fHitMap[ii];
      fHitMap[ii]=0;
    }
  }
    
  TClonesArray *richDigits;
  for (Int_t k=0;k<kNCH;k++) {
    richDigits = pRICH->DigitsAddress(k);
    Int_t ndigit=richDigits->GetEntriesFast();
    printf ("Chamber %d digits %d \n",k,ndigit);
  }
  pRICH->ResetDigits(); /// ??? should it be here???
  gAlice->TreeD()->Write(0,TObject::kOverwrite);
  // reset tree
  //    gAlice->TreeD()->Reset();
  //    delete fList; // deleted in dtor
  // gObjectTable->Print();

}
Commit	Line	Data
d8a72780	1	/**************************************************************************
	2	* Copyright(c) 1998-2000, 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	$Log$
31eeed4f	18	Revision 1.5 2001/10/23 13:03:35 hristov
	19	The access to several data members was changed from public to protected. The digitisation was adapted to the multi-event case (J.Chudoba)
	20
6e585aa2	21	Revision 1.4 2001/10/21 18:31:24 hristov
	22	Several pointers were set to zero in the default constructors to avoid memory management problems
	23
2685bf00	24	Revision 1.3 2001/05/16 14:57:20 alibrary
	25	New files for folders and Stack
	26
9e1a0ddb	27	Revision 1.2 2001/03/14 18:16:08 jbarbosa
	28	Corrected bug (more to correct).
	29	File "points.dat" is no longer created.
	30
14886cb7	31	Revision 1.1 2001/02/27 22:13:34 jbarbosa
	32	Implementing merger class.
	33
d8a72780	34	*/
b762c2f6	35	#include <iostream>
d8a72780	36
d8a72780	37	#include <TTree.h>
d8a72780	38	#include <TObjArray.h>
	39	#include <TFile.h>
	40	#include <TDirectory.h>
	41	#include <TParticle.h>
	42
d8a72780	43	#include "AliRICHMerger.h"
	44	#include "AliRICHChamber.h"
	45	#include "AliHitMap.h"
	46	#include "AliRICHHitMapA1.h"
	47	#include "AliRICH.h"
	48	#include "AliRICHHit.h"
	49	#include "AliRICHSDigit.h"
	50	#include "AliRICHDigit.h"
	51	#include "AliRICHTransientDigit.h"
	52	#include "AliRun.h"
	53	#include "AliPDG.h"
	54
	55	ClassImp(AliRICHMerger)
	56
	57	//___________________________________________
b762c2f6	58	AliRICHMerger::AliRICHMerger()
d8a72780	59	{
d8a72780	60	// Default constructor
b762c2f6	61	fEvNrSig = 0;
	62	fEvNrBgr = 0;
	63	fMerge = kDigitize;
	64	fFnBgr = 0;
	65	fHitMap = 0;
	66	fList = 0;
	67	fTrH1 = 0;
	68	fHitsBgr = 0;
	69	fSDigitsBgr = 0;
	70	fHitMap = 0;
	71	fList = 0;
	72	fBgrFile = 0;
d8a72780	73	}
	74
	75	//------------------------------------------------------------------------
	76	AliRICHMerger::~AliRICHMerger()
	77	{
	78	// Destructor
b762c2f6	79	if (fTrH1) delete fTrH1;
	80	if (fHitsBgr) delete fHitsBgr;
	81	if (fSDigitsBgr) delete fSDigitsBgr;
	82	if (fHitMap) delete fHitMap;
	83	if (fList) delete fList;
	84	if (fBgrFile) delete fBgrFile;
d8a72780	85	}
	86
	87	//------------------------------------------------------------------------
b762c2f6	88	Bool_t AliRICHMerger::Exists(const AliRICHSDigit *padhit)
d8a72780	89	{
b762c2f6	90	return (fHitMap[fNch]->TestHit(padhit->PadX(),padhit->PadY()));
d8a72780	91	}
	92
	93	//------------------------------------------------------------------------
b762c2f6	94	void AliRICHMerger::Update(AliRICHSDigit *padhit)
d8a72780	95	{
b762c2f6	96	AliRICHTransientDigit *pdigit =
	97	static_cast<AliRICHTransientDigit*>(
	98	fHitMap[fNch]->GetHit(padhit->PadX(),padhit->PadY()));
	99
	100	// update charge
	101	//
	102	Int_t iqpad = Int_t(padhit->QPad()); // charge per pad
	103	pdigit->AddSignal(iqpad);
	104	pdigit->AddPhysicsSignal(iqpad);
	105
	106	// update list of tracks
	107	//
	108	Int_t track, charge;
	109	if (fSignal) {
	110	track = fTrack;
	111	charge = iqpad;
	112	} else {
	113	track = kBgTag;
	114	charge = kBgTag;
	115	}
	116	pdigit->UpdateTrackList(track,charge);
d8a72780	117	}
	118
	119	//------------------------------------------------------------------------
b762c2f6	120	void AliRICHMerger::CreateNew(AliRICHSDigit *padhit)
d8a72780	121	{
b762c2f6	122	fList->AddAtAndExpand(
	123	new AliRICHTransientDigit(fNch,fDigits),fCounter);
	124	fHitMap[fNch]->SetHit(padhit->PadX(),padhit->PadY(),fCounter);
	125
	126	AliRICHTransientDigit* pdigit =
	127	static_cast<AliRICHTransientDigit*>(fList->Last());
	128	// list of tracks
	129	Int_t track, charge;
	130	if (fSignal) {
	131	track = fTrack;
	132	charge = padhit->QPad();
	133	} else {
	134	track = kBgTag;
	135	charge = kBgTag;
	136	}
	137	pdigit->AddToTrackList(track,charge);
	138	fCounter++;
d8a72780	139	}
	140
	141
	142	//------------------------------------------------------------------------
	143	void AliRICHMerger::Init()
	144	{
	145	// Initialisation
	146
b762c2f6	147	if (fMerge && !fBgrFile) fBgrFile = InitBgr();
d8a72780	148	}
	149
	150
	151
	152	//------------------------------------------------------------------------
	153	TFile* AliRICHMerger::InitBgr()
	154	{
	155	// Initialise background event
b762c2f6	156	TFile *file = new TFile(fFnBgr);
d8a72780	157	// add error checking later
b762c2f6	158	printf("\n AliRICHMerger has opened %s file with background event \n", fFnBgr);
	159	fHitsBgr = new TClonesArray("AliRICHHit",1000);
	160	fSDigitsBgr = new TClonesArray("AliRICHSDigit",1000);
	161	return file;
d8a72780	162	}
	163
	164	//------------------------------------------------------------------------
	165	void AliRICHMerger::Digitise(Int_t nev, Int_t flag)
	166	{
	167
b762c2f6	168	// keep galice.root for signal and name differently the file for
b762c2f6	169	// background when add! otherwise the track info for signal will be lost !
d8a72780	170
	171	Int_t particle;
	172
d8a72780	173	AliRICHChamber* iChamber;
	174	AliSegmentation* segmentation;
	175
b762c2f6	176	fList = new TObjArray;
d8a72780	177
b762c2f6	178	AliRICH pRICH = (AliRICH ) gAlice->GetDetector("RICH");
b762c2f6	179	fHitMap= new AliHitMap* [kNCH];
d8a72780	180
b762c2f6	181	if (fMerge ) {
	182	fBgrFile->cd();
	183	//
	184	// Get Hits Tree header from file
	185	if(fHitsBgr) fHitsBgr->Clear();
	186	if(fSDigitsBgr) fSDigitsBgr->Clear();
	187	if(fTrH1) delete fTrH1;
	188	fTrH1 = 0;
d8a72780	189
b762c2f6	190	char treeName[20];
	191	sprintf(treeName,"TreeH%d",fEvNrBgr);
	192	fTrH1 = (TTree*)gDirectory->Get(treeName);
	193	if (!fTrH1) {
	194	printf("ERROR: cannot find Hits Tree for event:%d\n",fEvNrBgr);
d8a72780	195	}
d8a72780	196	//
b762c2f6	197	// Set branch addresses
	198	TBranch *branch;
	199	char branchname[20];
	200	sprintf(branchname,"%s",pRICH->GetName());
	201	if (fTrH1 && fHitsBgr) {
	202	branch = fTrH1->GetBranch(branchname);
	203	if (branch) branch->SetAddress(&fHitsBgr);
	204	}
	205	if (fTrH1 && fSDigitsBgr) {
	206	branch = fTrH1->GetBranch("RICHSDigits");
	207	if (branch) branch->SetAddress(&fSDigitsBgr);
	208	}
	209	}
d8a72780	210
b762c2f6	211	for (Int_t i =0; i<kNCH; i++) {
	212	iChamber= &(pRICH->Chamber(i));
	213	segmentation=iChamber->GetSegmentationModel(1);
	214	fHitMap[i] = new AliRICHHitMapA1(segmentation, fList);
	215	}
	216	//
	217	// Loop over tracks
	218	//
	219
	220	fSignal = kTRUE;
	221	fCounter = 0;
	222	TTree *treeH = gAlice->TreeH();
	223	Int_t ntracks =(Int_t) treeH->GetEntries();
	224	for (fTrack=0; fTrack<ntracks; fTrack++) {
	225	gAlice->ResetHits();
	226	treeH->GetEvent(fTrack);
	227	//
	228	// Loop over hits
	229	for(AliRICHHit* mHit=(AliRICHHit*)pRICH->FirstHit(-1);
	230	mHit;
	231	mHit=(AliRICHHit*)pRICH->NextHit())
	232	{
d8a72780	233
b762c2f6	234	fNch = mHit->Chamber()-1; // chamber number
	235	Int_t trackIndex = mHit->Track();
	236	if (fNch >= kNCH) {
	237	cerr<<"AliRICHMerger: chamber nr. fNch out of range: "<<fNch<<endl;
	238	cerr<<" track: "<<fTrack<<endl;
	239	continue;
	240	}
	241	iChamber = &(pRICH->Chamber(fNch));
d8a72780	242
b762c2f6	243
	244	//
	245	// If flag is set, create digits only for some particles
	246	//
	247	TParticle current = (TParticle)gAlice->Particle(trackIndex);
	248	if (current->GetPdgCode() >= 50000050)
	249	{
	250	TParticle motherofcurrent = (TParticle)gAlice->Particle(current->GetFirstMother());
	251	particle = motherofcurrent->GetPdgCode();
	252	}
	253	else
	254	{
	255	particle = current->GetPdgCode();
	256	}
d8a72780	257
d8a72780	258
b762c2f6	259	//printf("Flag:%d\n",flag);
	260	//printf("Track:%d\n",track);
	261	//printf("Particle:%d\n",particle);
d8a72780	262
b762c2f6	263	Int_t digitise=1;
d8a72780	264
b762c2f6	265	if (flag == 1)
	266	if(TMath::Abs(particle)==211 \|\| TMath::Abs(particle)==111)
	267	digitise=0;
d8a72780	268
b762c2f6	269	if (flag == 2)
	270	if(TMath::Abs(particle)==321 \|\| TMath::Abs(particle)==130 \|\| TMath::Abs(particle)==310
	271	\|\| TMath::Abs(particle)==311)
	272	digitise=0;
d8a72780	273
b762c2f6	274	if (flag == 3 && TMath::Abs(particle)==2212)
b762c2f6	275	digitise=0;
d8a72780	276
b762c2f6	277	if (flag == 4 && TMath::Abs(particle)==13)
b762c2f6	278	digitise=0;
d8a72780	279
b762c2f6	280	if (flag == 5 && TMath::Abs(particle)==11)
b762c2f6	281	digitise=0;
d8a72780	282
b762c2f6	283	if (flag == 6 && TMath::Abs(particle)==2112)
b762c2f6	284	digitise=0;
d8a72780	285
d8a72780	286
b762c2f6	287	//printf ("Particle: %d, Flag: %d, Digitise: %d\n",particle,flag,digitise);
d8a72780	288
d8a72780	289
b762c2f6	290	if (digitise)
b762c2f6	291	{
d8a72780	292
b762c2f6	293	//
	294	// Loop over pad hits
	295	for (AliRICHSDigit* mPad=
	296	(AliRICHSDigit*)pRICH->FirstPad(mHit,pRICH->SDigits());
	297	mPad;
	298	mPad=(AliRICHSDigit*)pRICH->NextPad(pRICH->SDigits()))
	299	{
	300	Int_t iqpad = mPad->QPad(); // charge per pad
	301	fDigits[0]=mPad->PadX();
	302	fDigits[1]=mPad->PadY();
	303	fDigits[2]=iqpad;
	304	fDigits[3]=iqpad;
	305	fDigits[4]=mPad->HitNumber();
d8a72780	306
b762c2f6	307	// build the list of fired pads and update the info
	308	if (Exists(mPad)) {
	309	Update(mPad);
	310	} else {
	311	CreateNew(mPad);
	312	}
	313	} //end loop over clusters
	314	}// track type condition
	315	} // hit loop
	316	} // track loop
d8a72780	317
b762c2f6	318	// open the file with background
d8a72780	319
b762c2f6	320	if (fMerge) {
	321	fSignal = kFALSE;
	322	ntracks = (Int_t)fTrH1->GetEntries();
	323	//
	324	// Loop over tracks
	325	//
	326	for (fTrack = 0; fTrack < ntracks; fTrack++) {
d8a72780	327
b762c2f6	328	if (fHitsBgr) fHitsBgr->Clear();
b762c2f6	329	if (fSDigitsBgr) fSDigitsBgr->Clear();
d8a72780	330
b762c2f6	331	fTrH1->GetEvent(fTrack);
	332	//
	333	// Loop over hits
	334	AliRICHHit* mHit;
	335	for(Int_t i = 0; i < fHitsBgr->GetEntriesFast(); ++i)
	336	{
	337	mHit = (AliRICHHit) (fHitsBgr)[i];
	338	fNch = mHit->Chamber()-1; // chamber number
	339	iChamber = &(pRICH->Chamber(fNch));
	340
d8a72780	341	//
b762c2f6	342	// Loop over pad hits
	343	for (AliRICHSDigit* mPad =
	344	(AliRICHSDigit*)pRICH->FirstPad(mHit,fSDigitsBgr);
	345	mPad;
	346	mPad = (AliRICHSDigit*)pRICH->NextPad(fSDigitsBgr))
	347	{
	348	fDigits[0] = mPad->PadX();
	349	fDigits[1] = mPad->PadY();
	350	fDigits[2] = mPad->QPad();
	351	fDigits[3] = 0;
	352	fDigits[4] = -1; // set hit number to -1 for bgr
d8a72780	353
b762c2f6	354	// build the list of fired pads and update the info
	355	if (!Exists(mPad)) {
	356	CreateNew(mPad);
	357	} else {
	358	Update(mPad);
	359	} // end if !Exists
	360	} //end loop over clusters
	361	} // hit loop
	362	} // track loop
d8a72780	363
b762c2f6	364	TTree *treeK = gAlice->TreeK();
b762c2f6	365	TFile *file = NULL;
d8a72780	366
b762c2f6	367	if (treeK) file = treeK->GetCurrentFile();
	368	file->cd();
	369	} // if fMerge
d8a72780	370
b762c2f6	371	Int_t tracks[kMAXTRACKSPERRICHDIGIT];
	372	Int_t charges[kMAXTRACKSPERRICHDIGIT];
	373	Int_t nentries=fList->GetEntriesFast();
d8a72780	374
b762c2f6	375	for (Int_t nent=0;nent<nentries;nent++) {
	376	AliRICHTransientDigit transDigit=(AliRICHTransientDigit)fList->At(nent);
	377	if (transDigit==0) continue;
	378	Int_t ich=transDigit->GetChamber();
	379	Int_t q=transDigit->Signal();
	380	iChamber=&(pRICH->Chamber(ich));
	381	AliRICHResponse * response=iChamber->GetResponseModel();
	382	Int_t adcmax= (Int_t) response->MaxAdc();
d8a72780	383
d8a72780	384
b762c2f6	385	// add white noise and do zero-suppression and signal truncation (new electronics,old electronics gaus 1.2,0.2)
	386	//printf("Treshold: %d\n",iChamber->fTresh->GetHitIndex(transDigit->PadX(),transDigit->PadY()));
	387	Int_t pedestal = iChamber->fTresh->GetHitIndex(transDigit->PadX(),transDigit->PadY());
d8a72780	388
b762c2f6	389	//printf("Pedestal:%d\n",pedestal);
	390	//Int_t pedestal=0;
	391	Float_t treshold = (pedestal + 4*2.2);
d8a72780	392
b762c2f6	393	Float_t meanNoise = gRandom->Gaus(2.2, 0.3);
	394	Float_t noise = gRandom->Gaus(0, meanNoise);
	395	q+=(Int_t)(noise + pedestal);
	396	//q+=(Int_t)(noise);
	397	// magic number to be parametrised !!!
	398	if ( q <= treshold)
	399	{
d8a72780	400	q = q - pedestal;
b762c2f6	401	continue;
	402	}
	403	q = q - pedestal;
	404	if ( q >= adcmax) q=adcmax;
	405	fDigits[0]=transDigit->PadX();
	406	fDigits[1]=transDigit->PadY();
	407	fDigits[2]=q;
	408	fDigits[3]=transDigit->Physics();
	409	fDigits[4]=transDigit->Hit();
	410
	411	Int_t nptracks = transDigit->GetNTracks();
	412
	413	// this was changed to accomodate the real number of tracks
	414	if (nptracks > kMAXTRACKSPERRICHDIGIT) {
	415	printf("Attention - tracks > 10 %d\n",nptracks);
	416	nptracks=kMAXTRACKSPERRICHDIGIT;
	417	}
	418	if (nptracks > 2) {
	419	printf("Attention - tracks > 2 %d \n",nptracks);
	420	//printf("cat,ich,ix,iy,q %d %d %d %d %d \n",
	421	//icat,ich,digits[0],digits[1],q);
	422	}
	423	for (Int_t tr=0;tr<nptracks;tr++) {
	424	tracks[tr]=transDigit->GetTrack(tr);
	425	charges[tr]=transDigit->GetCharge(tr);
	426	} //end loop over list of tracks for one pad
	427	if (nptracks < kMAXTRACKSPERRICHDIGIT ) {
	428	for (Int_t t=nptracks; t<kMAXTRACKSPERRICHDIGIT; t++) {
	429	tracks[t]=0;
	430	charges[t]=0;
d8a72780	431	}
b762c2f6	432	}
	433	//write file
	434	//if (ich==2)
	435	//fprintf(points,"%4d, %4d, %4d\n",digits[0],digits[1],digits[2]);
d8a72780	436
b762c2f6	437	// fill digits
	438	pRICH->AddDigits(ich,tracks,charges,fDigits);
	439	}
	440	gAlice->TreeD()->Fill();
	441
	442	fList->Delete();
	443	for(Int_t ii=0;ii<kNCH;++ii) {
	444	if (fHitMap[ii]) {
	445	delete fHitMap[ii];
	446	fHitMap[ii]=0;
d8a72780	447	}
b762c2f6	448	}
d8a72780	449
b762c2f6	450	TClonesArray *richDigits;
	451	for (Int_t k=0;k<kNCH;k++) {
	452	richDigits = pRICH->DigitsAddress(k);
	453	Int_t ndigit=richDigits->GetEntriesFast();
	454	printf ("Chamber %d digits %d \n",k,ndigit);
	455	}
	456	pRICH->ResetDigits(); /// ??? should it be here???
	457	gAlice->TreeD()->Write(0,TObject::kOverwrite);
	458	// reset tree
	459	// gAlice->TreeD()->Reset();
	460	// delete fList; // deleted in dtor
	461	// gObjectTable->Print();
d8a72780	462
d8a72780	463	}