[u/mrichter/AliRoot.git] / EMCAL / AliEMCALJetFinderAlgoUA1.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.                  *
 **************************************************************************/

/* $Id$ */

//*--Author: Sarah Blyth (LBL)
//*--Based on UA1 jet algorithm from LUND JETSET called from EMC-erj

#include "TTask.h"
#include "AliEMCALJetFinderInput.h"
#include "AliEMCALJetFinderOutput.h"
#include "AliEMCALJetFinderAlgo.h"
#include "AliEMCALJetFinderAlgoUA1.h"
#include "AliEMCALJetFinderAlgoUA1Unit.h"
#include "AliEMCALGeometry.h"
#include "AliEMCAL.h"
#include "AliEMCALGetter.h"
#include "AliEMCALDigit.h"
#include "TParticle.h"
#include "AliRun.h"
#include "AliEMCALJet.h"
#include "TMath.h"


ClassImp(AliEMCALJetFinderAlgoUA1)

  AliEMCALJetFinderAlgoUA1::AliEMCALJetFinderAlgoUA1()
{
  //Default constructor
if (fDebug>0) Info("AliEMCALJetFinderAlgoUA1","Beginning Default Constructor");

  fNumIter           = 0;
  fNumUnits          = 13824;     //Number of towers in EMCAL
  fESeed             = 5.0;       //Default value
  fConeRad           = 0.5;       //Default value
  fJetEMin           = 10.0;      //Default value
  fEtMin             = 0.28;      //Default value
  fMinMove           = 0.05;      //From original UA1 JetFinder
  fMaxMove           = 0.15;      //From original UA1 JetFinder
  fBGMaxMove         = 0.035;     //From original UA1 JetFinder
  fPtCut             = 0;         
  fHadCorr           = 0;       
  fEBGTotal          = 1.0;       //Set to 1 so that no div by zero in first FindJets() loop
  fEBGTotalOld       = 0.0;
  fEBGAve            = 0.0;
  fEnergy            = 0.0;
  fJetEta            = 0.0;
  fJetPhi            = 0.0;
  fEtaInit           = 0.0;
  fPhiInit           = 0.0;
  fEtaB              = 0.0;
  fPhiB              = 0.0;
  fJetESum           = 0.0;
  fJetEtaSum         = 0.0;
  fJetPhiSum         = 0.0;
  fDEta              = 0.0;
  fDPhi              = 0.0;
  fDistP             = 0.0;
  fDistI             = 0.0;
  fTempE             = 0.0;
  fRad               = 2.0;      //Set to 2 to start 
  fNumInCone         = 0;
  fNumJets           = 0;
  fArrayInitialised  = 0;        //Set to FALSE to start
}

 AliEMCALJetFinderAlgoUA1::~AliEMCALJetFinderAlgoUA1()
   {
     //Destructor
     if (fDebug>0) Info("AliEMCALJetFinderAlgoUA1","Beginning Destructor");
     delete[] fUnit;
   }

 void AliEMCALJetFinderAlgoUA1::SetJetFindingParameters
                               (Int_t numUnits, Float_t eSeed, Float_t coneRad, Float_t jetEMin, Float_t etMin, 
                               Float_t minMove, Float_t maxMove, Float_t bgMaxMove)
   {
     //Sets parameters for the JetFinding algorithm
     if (fDebug>1) Info("SetJetFindingParameters","Setting parameters for JetFinding");

     SetNumUnits(numUnits);
     SetJetESeed(eSeed);
     SetConeRad(coneRad);
     SetJetEMin(jetEMin);
     SetEtMin(etMin);
     SetMinMove(minMove);
     SetMaxMove(maxMove);
     SetBGMaxMove(bgMaxMove);
   }

 void AliEMCALJetFinderAlgoUA1::SetJetFindingParameters
                               (Int_t numUnits, Float_t eSeed, Float_t coneRad, Float_t jetEMin, Float_t etMin)
   {
     //Sets fewer parameters for the JetFinding algorithm
     if (fDebug>1) Info("SetJetFindingParameters","Setting parameters for JetFinding");

     SetNumUnits(numUnits);
     SetJetESeed(eSeed);
     SetConeRad(coneRad);
     SetJetEMin(jetEMin);
     SetEtMin(etMin);
     SetMinMove(fMinMove);
     SetMaxMove(fMaxMove);
     SetBGMaxMove(fBGMaxMove);
   }

 void AliEMCALJetFinderAlgoUA1::InitUnitArray()
   {
     //Initialises unit array
     if(fArrayInitialised) delete[] fUnit;
     fUnit = new AliEMCALJetFinderAlgoUA1Unit[fNumUnits];
     fArrayInitialised = 1;
   }

 void AliEMCALJetFinderAlgoUA1::FillUnitArray(AliEMCALJetFinderAlgoUA1FillUnitFlagType_t flag)
   {
     if (fDebug>1) Info("FillUnitArray","Beginning FillUnitArray");
     //AliEMCAL* pEMCAL = (AliEMCAL*) gAlice->GetModule("EMCAL");

         //   if (pEMCAL){ 
         //	     AliEMCALGeometry* geom =  AliEMCALGeometry::GetInstance(pEMCAL->GetTitle(), "");
         //     }else
         //    {
     //AliEMCALGeometry* geom =  AliEMCALGeometry::GetInstance("EMCAL_5655_21", "");
     AliEMCALGeometry* geom = AliEMCALGetter::Instance()->EMCALGeometry() ; 
       //    }
         
     AliEMCALJetFinderAlgoUA1FillUnitFlagType_t option = flag;
     Int_t         numTracks, numDigits;
    
     //Loops over all elements in the AliEMCALJetFinderAlgoUA1Unit array and 
     //fills the objects with relevant values from the Data Input object
     if (fDebug>1) Info("FillUnitArray","Filling array with Unit objects");
     if (fDebug>1) Info("FillUnitArray","NTracks %i NDigits %i",fInputPointer->GetNTracks(),fInputPointer->GetNDigits());
	 numTracks = fInputPointer->GetNTracks();
	 numDigits = fInputPointer->GetNDigits();
	 TParticle         *myPart;
	 AliEMCALDigit     *myDigit;

	 //Fill units with Track info if appropriate
	 if(option==kFillTracksOnly || option ==kFillAll) 
	   {          
	    for(Int_t j=0; j<numTracks; j++)
	    {
	     myPart = fInputPointer->GetTrack(j);
	     Float_t eta = myPart->Eta();
	     Float_t  phi = myPart->Phi();
	     Int_t towerID = geom->TowerIndexFromEtaPhi(eta,180.0/TMath::Pi()*phi);
	     Float_t  pT = myPart->Pt();
	     Float_t unitEnergy = fUnit[towerID-1].GetUnitEnergy(); 

   	     //Do Hadron Correction
              if(fHadCorr != 0)
	       {
		 Double_t   fullP = myPart->P();
		 Double_t   hCEnergy = fHadCorr->GetEnergy(fullP, (Double_t)eta);
		 unitEnergy -= hCEnergy*TMath::Sin(myPart->Theta());
		 fUnit[towerID-1].SetUnitEnergy(unitEnergy);
	       } //end Hadron Correction loop 
	     
	     //Do Pt cut on tracks
	     if(fPtCut != 0 && pT < fPtCut) continue;

	     fUnit[towerID-1].SetUnitEnergy(unitEnergy+pT);

             }//end tracks loop
	   }//end Tracks condition


	 //Fill units with Digit info if appropriate
	 if(option ==kFillDigitsOnly || option ==kFillAll)
	   {
            for(Int_t k=0; k<numDigits; k++)
	    {
	     myDigit = fInputPointer->GetDigit(k);
             if (fDebug>1) Info("FillUnitArray","getting digits %i %i numdigits",k,numDigits );
	     Int_t towerID = myDigit->GetId();
	     Int_t amplitude = myDigit->GetAmp();     //Gets the integer valued amplitude of the digit
	     Float_t amp = (Float_t)amplitude;        //Need to typecast to Float_t before doing real energy conversion
	     Float_t digitEnergy = amp/10000000.0;    //Factor of 10 million needed to convert!
	     Float_t unitEnergy = fUnit[towerID-1].GetUnitEnergy() + digitEnergy;
	     fUnit[towerID-1].SetUnitEnergy(unitEnergy);

	    }//end digits loop
	   }//end digits condition

	 //Set all unit flags, Eta, Phi
	 for(Int_t i=0; i<fNumUnits; i++)
	   {
             if (fDebug>1) Info("FillUnitArray","Setting all units outside jets");
	     fUnit[i].SetUnitFlag(kOutJet);           //Set all units to be outside a jet initially
	     fUnit[i].SetUnitID(i+1);
	     Float_t eta;
	     Float_t phi;
	     geom->EtaPhiFromIndex(fUnit[i].GetUnitID(), eta, phi);
	     fUnit[i].SetUnitEta(eta);
	     fUnit[i].SetUnitPhi(phi*TMath::Pi()/180.0);
	     //	     if(i>13000) cout<<"!!!!!!!!!!!!!!!!!For unit0, eta="<<eta<<" and phi="<<phi*TMath::Pi()/180.0<<" and ID="<<fUnit[i].GetUnitID()<<endl;
	     //  if(fUnit[i].GetUnitEnergy()>0) cout<<"Unit ID "<<fUnit[i].GetUnitID() <<"with eta="<<eta<<" and phi="<<phi*TMath::Pi()/180.0<<" has energy="<<fUnit[i].GetUnitEnergy()<<endl;
	   }//end loop over all units in array (same as all towers in EMCAL)
   }


 void AliEMCALJetFinderAlgoUA1::Sort(AliEMCALJetFinderAlgoUA1Unit *unit, Int_t length)
 {
   //Calls the recursive quicksort method to sort unit objects in decending order of Energy
   if (fDebug>1) Info("Sort","Sorting Unit objects");
   QS(unit, 0, length-1);
 }
  

 void AliEMCALJetFinderAlgoUA1::QS(AliEMCALJetFinderAlgoUA1Unit *unit, Int_t left, Int_t right)
 {
  //Sorts the AliEMCALJetFinderAlgoUA1Unit objects in decending order of Energy
   if (fDebug>111) Info("QS","QuickSorting Unit objects");   

   Int_t    i;
   Int_t    j;
   AliEMCALJetFinderAlgoUA1Unit  unitFirst;
   AliEMCALJetFinderAlgoUA1Unit  unitSecond;

   i = left;
   j = right;
   unitFirst = unit[(left+right)/2];

 do
  {
    while( (unit[i].GetUnitEnergy() > unitFirst.GetUnitEnergy()) && (i < right)) i++;
    while( (unitFirst.GetUnitEnergy() > unit[j].GetUnitEnergy()) && (j > left)) j--;

    if(i <= j)
      {
	unitSecond = unit[i];
	unit[i] = unit[j];
	unit[j] = unitSecond;
	i++;
	j--;
      }//end if
  }while(i <= j);

 if(left < j) QS(unit, left, j);
 if(i < right) QS(unit, i, right);
 }


 void AliEMCALJetFinderAlgoUA1::FindBG()
   {
     //Finds the background energy for the iteration
     if (fDebug>1) Info("FindBG","Finding Average Background"); 

     fEBGTotal          = 0.0;
     Int_t numCone      = 0;

     //Loop over all unit objects in the array and sum the energy of those not in a jet
     for(Int_t i=0; i<fNumUnits; i++)
       {
	 if(fUnit[i].GetUnitFlag() != kInJet)
	   fEBGTotal += fUnit[i].GetUnitEnergy();
	 else numCone++;
       }//end for

     fEBGTotalOld = fEBGTotal;
     fEBGAve = fEBGTotal / (fNumUnits - numCone);
     if (fDebug>5) Info("FindBG","Average BG is %f: ",fEBGAve);      

     for(Int_t count=0; count<fNumUnits;count++)
       {
	 fUnit[count].SetUnitFlag(kOutJet);
       }//end for
   }


 void AliEMCALJetFinderAlgoUA1::FindJetEtaPhi(Int_t counter)
   {
     //Finds the eta and phi of the jet axis
     if (fDebug>1) Info("FindJetEtaPhi","Finding Jet Eta and Phi");

     fDEta = fUnit[counter].GetUnitEta() - fEtaInit;
     fDPhi = fUnit[counter].GetUnitPhi() - fPhiInit;

     fEnergy = fUnit[counter].GetUnitEnergy() - fEBGAve;
     fJetEtaSum += fEnergy * fDEta;
     fJetPhiSum += fEnergy * fDPhi;
     fJetESum += fEnergy;
     fJetEta = fEtaInit + (fJetEtaSum / fJetESum);
     fJetPhi = fPhiInit + (fJetPhiSum / fJetESum);
   }


 void AliEMCALJetFinderAlgoUA1::FindJetEnergy()
   {
     //Finds the energy of the jet after the final axis has been found
     if (fDebug>1) Info("FindJetEnergy","Finding Jet Energy");

     for(Int_t i=0; i<fNumUnits; i++)
       {
	 //Loop over all unit objects in the array and find if within cone radius
	 Float_t dEta = fUnit[i].GetUnitEta() - fJetEta;
	 Float_t dPhi = fUnit[i].GetUnitPhi() - fJetPhi;
	 Float_t rad = TMath::Sqrt( (dEta*dEta) + (dPhi*dPhi) );

	 if(fUnit[i].GetUnitFlag()==kOutJet && rad<= fConeRad)
	   {
	     fUnit[i].SetUnitFlag(kInCurrentJet);
	     Float_t energy = fUnit[i].GetUnitEnergy() - fEBGAve;
	     fJetESum += energy;                             
	     fJetEtaSum += energy * dEta;
	     fJetPhiSum += energy * dPhi;
	     fNumInCone++;                     //Increment the number of cells in the jet cone
	   }//end if
       }//end for
   }


 void AliEMCALJetFinderAlgoUA1::StoreJetInfo()
   {
     //Stores the resulting jet information in appropriate storage structure (TO BE DECIDED!!!!)
     if (fDebug>1) Info("StoreJetInfo","Storing Jet Information");
    
     //Store:
     //fJetESum is the final jet energy (background has been subtracted)
     //fJetEta is the final jet Eta
     //fJetPhi is the final jet Phi
     //fNumInCone is the final number of cells included in the jet cone
     //fEtaInit is the eta of the initiator cell
     //fPhiInit is the phi of the initiator cell
     fJet.SetEnergy(fJetESum);
     fJet.SetEta(fJetEta);
     fJet.SetPhi(fJetPhi);

      cout<<"For iteration "<<fNumIter <<" and Jet number " <<fNumJets <<endl;
      cout<<"The jet energy is: " <<fJetESum <<endl;
      cout<<"The jet eta is ---->" <<fJetEta <<endl;
      cout<<"The jet phi is ---->" <<fJetPhi <<endl;

     Int_t             numberTracks = fInputPointer->GetNTracks();
     TParticle         *myP;
     Int_t             numTracksInCone = 0;

     for(Int_t counter=0; counter<numberTracks; counter++)
       {
	myP = fInputPointer->GetTrack(counter);
	Float_t eta = myP->Eta();
	Float_t phi = myP->Phi(); 
	Float_t deta = fJetEta-eta;
	Float_t dphi = fJetPhi -phi;
	Float_t rad = TMath::Sqrt( (deta*deta) + (dphi*dphi));
	if(rad<=fConeRad) numTracksInCone++;
       }//end for

     Float_t    *pTArray = new Float_t[numTracksInCone];
     Float_t    *etaArray = new Float_t[numTracksInCone];
     Float_t    *phiArray = new Float_t[numTracksInCone];
     Int_t      *pdgArray = new Int_t[numTracksInCone];
     Int_t             index = 0;

     for(Int_t counter2=0; counter2<numberTracks; counter2++)
       {
	 myP = fInputPointer->GetTrack(counter2);
 	 Float_t eta = myP->Eta();
         Float_t phi = myP->Phi(); 
	 Float_t deta = fJetEta-eta;
	 Float_t dphi = fJetPhi -phi;
	 Float_t rad = TMath::Sqrt( (deta*deta) + (dphi*dphi));
	 if(rad<=fConeRad)
	   {
	     pTArray[index] = myP->Pt();
	     etaArray[index] = eta;
	     phiArray[index] = phi;
	     pdgArray[index] = myP->GetPdgCode();
	     index++;
	   }//end if
       }//end for

     fJet.SetTrackList(numTracksInCone,pTArray, etaArray, phiArray, pdgArray);
     fOutputObject.AddJet(&fJet);
     delete[] pTArray;
     delete[] etaArray;
     delete[] phiArray;
     delete[] pdgArray;
   }


 void AliEMCALJetFinderAlgoUA1::FindJets()
   {
     //Runs the complete UA1 JetFinding algorithm to find jets!
     if (fDebug>1) Info("FindJets","Starting Jet Finding!!!");

     //If the array of JetFinderUnit objects has not been initialised then initialise with default settings
     if(!fArrayInitialised) 
      {
       InitUnitArray();
       FillUnitArray(kFillAll);
      }//end if
     if (fDebug>1) Info("FindJets","Unit array filled");

     //Step 1. Sort the array in descending order of Energy
     Sort(fUnit,fNumUnits);

     //Step 2. Set the number of iterations and Number of jets found to zero to start
     fNumIter = 0;
     fNumJets = 0;

     //Step 3. Begin the iteration loop to find jets
     //Need to iterate the algorithm while number of iterations<2 OR number of iterations<10 AND 
     //the value of the average background has changed more than specified amount
     //Min iterations = 2, Max iterations = 10
     //while(fNumIter<2 || (fNumIter <10 && ( (fEBGTotal-fEBGTotalOld)/fEBGTotal) > fBGMaxMove) )

     while(fNumIter<2 || (fNumIter <10 && ( fEBGTotal-fEBGTotalOld) > fEBGTotal*fBGMaxMove) )
       {
        if (fDebug>1) Info("FindJets","Starting BIG iteration ---> %i",fNumIter);

         //Step 4. Find the value of the average background energy
	 FindBG();
	 fOutputObject.Reset(kResetJets); //Reset output object to store info for new iteration
	 fNumJets=0;

	 //Loop over the array of unit objects and flag those with energy below MinCellEt
         Int_t numbelow = 0;
	 for(Int_t j=0; j<fNumUnits; j++)
	   {
	     if( (fUnit[j].GetUnitEnergy()-fEBGAve) < fEtMin)
        	{       
                  fUnit[j].SetUnitFlag(kBelowMinEt);
                  numbelow++;
        	// if (fDebug>1) Info("FindJets","Below Min Et: %i",j);
                }//end if
	   }//end for

	 //Do quick check if there are no jets upfront
	 if(fUnit[0].GetUnitFlag() == kBelowMinEt)
	   {
            cout <<"There are no jets for this event!" <<endl;
	    break;
	   }//end if

         //Step 5. Begin with the first jet candidate cell (JET SEED LOOP)
         if (fDebug>5) Info("FindJets","Beginning JET SEED LOOP");
	 for(Int_t count=0; count<fNumUnits; count++)
	   {

//CHECK CONDITION HERE _ NOT SURE IF SHOULD MAYBE BE: GetUnitEnergy()-fEBGAve >fESeed?????????????????????????????
	     if(fUnit[count].GetUnitEnergy()>=fESeed && fUnit[count].GetUnitFlag()==kOutJet)
	       {
		 fEnergy = fUnit[count].GetUnitEnergy() - fEBGAve;
		 fJetEta = fUnit[count].GetUnitEta();
		 fJetPhi = fUnit[count].GetUnitPhi();
                 if (fDebug>5) Info("FindJets","Inside first candidate jet seed loop for time : %i", count);
                 if (fDebug>5) Info("FindJets","Found candidate energy %f ",fEnergy);
                 if (fDebug>5) Info("FindJets","Found candidate eta %f ", fJetEta);
                 if (fDebug>5) Info("FindJets","Found candidate phi %f ", fJetPhi);

		 fEtaInit = fJetEta;
		 fPhiInit = fJetPhi;
		 fEtaB = fJetEta;
		 fPhiB = fJetPhi;
		 fJetESum = 0.0;
		 fJetEtaSum = 0.0;
		 fJetPhiSum = 0.0;
       
         //Step 6. Find Jet Eta and Phi
		 //Loop over all units in the array to find the ones in the jet cone and determine contrib to Jet eta, phi
                 for(Int_t count1=0; count1<fNumUnits; count1++)		 
		   //for(Int_t count1=fNumUnits-1; count1>=0; count1--)    //Alternative method (will not break on first loop)
		   {
		     if(fUnit[count1].GetUnitFlag() == kOutJet)
		       {
			 fDEta = fUnit[count1].GetUnitEta() - fJetEta;
			 fDPhi = fUnit[count1].GetUnitPhi() - fJetPhi;
			 fRad = TMath::Sqrt( (fDEta*fDEta) + (fDPhi*fDPhi) );
			 if(fRad <= fConeRad)
			   {
			     FindJetEtaPhi(count1); 

			     
			     //check if cone moves less than minimum allowed move from previous cone
                             if (fDebug>10) Info("FindJets","Checking if cone move small enough");
			     fDistP = TMath::Sqrt( ((fJetEta-fEtaB)*(fJetEta-fEtaB)) + ((fJetPhi-fPhiB)*(fJetPhi-fPhiB)) );
			     if(fDistP <= fMinMove) break;
			     

			     //check if cone moves more than max allowed from initiator cell
                             if (fDebug>10) Info("FindJets","Checking if cone move too large");
			     fDistI = TMath::Sqrt( ((fJetEtaSum/fJetESum)*(fJetEtaSum/fJetESum)) + ((fJetPhiSum/fJetESum)*
												    (fJetPhiSum/fJetESum)));
			     if(fDistI >= fMaxMove)
			       {
				 fJetEta = fEtaB;
				 fJetPhi = fPhiB;
				 break;
			       }//end if

			     fEtaB = fJetEta;
			     fPhiB = fJetPhi;
			   }//end if
		       }//end if
		   }//end for (Jet Eta, Phi LOOP)

       //Step 7. Find the Jet Energy
                 if (fDebug>1) Info("FindJets","Looking for Jet energy");
		 fJetESum = 0.0;
		 fJetEtaSum = 0.0;
		 fJetPhiSum = 0.0;
		 fNumInCone = 0;
		 FindJetEnergy();

       //Step 8. Check if the jet is a valid jet
		 //Check if cluster energy is above Min allowed to be a jet
//DID NOT DO THE COSH COMPARISON HERE -> NEED TO CHECK WHICH COMPARISON IS BEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
                 if (fDebug>5) Info("FindJets","Checking cluster is valid jet");
		 if(fJetESum < fJetEMin)
		   {
		     for(Int_t count2=0; count2<fNumUnits; count2++)
		       {
			 if(fUnit[count2].GetUnitFlag()==kInCurrentJet || fUnit[count2].GetUnitFlag()==kOutJet)
			   fUnit[count2].SetUnitFlag(kOutJet);
		       }//end for
                   if (fDebug>10) Info("FindJets","NOT a valid jet cell");
		  }else
		    {
		     for(Int_t count2=0; count2<fNumUnits; count2++)
		       {
			 if(fUnit[count2].GetUnitFlag()==kInCurrentJet)
			   {
			     //	     cout<<"Setting unit #"<<count2 <<" to be officially in a jet!"<<endl;
                           fUnit[count2].SetUnitFlag(kInJet);
			   }
		       }//end for			

 //NEED TO CHECK FINAL WEIRD ITERATION OF ETA AND PHI CHANGES!!!!!!!!!
		     	      fJetPhi += fJetPhiSum/fJetESum;        //CHECK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
		         fJetEta += fJetEtaSum/fJetESum;        //CHECK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

		     fNumJets++;              //Incrementing number of jets found
		     StoreJetInfo();          //Storing jet info
		 }//end if (check cluster above Min Jet Energy)

	       }//end if (Jet Seed condition)
	   }//end (JET SEED LOOP)

if (fDebug>5) Info("FindJets","End of BIG iteration number %i",fNumIter);
// this->Dump();
	 fNumIter++;
       }//end 10 iteration WHILE LOOP
 }
Commit	Line	Data
f7d5860b	1
	2	/**************************************************************************
	3	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	4	* *
	5	* Author: The ALICE Off-line Project. *
	6	* Contributors are mentioned in the code where appropriate. *
	7	* *
	8	* Permission to use, copy, modify and distribute this software and its *
	9	* documentation strictly for non-commercial purposes is hereby granted *
	10	* without fee, provided that the above copyright notice appears in all *
	11	* copies and that both the copyright notice and this permission notice *
	12	* appear in the supporting documentation. The authors make no claims *
	13	* about the suitability of this software for any purpose. It is *
	14	* provided "as is" without express or implied warranty. *
	15	**************************************************************************/
	16
ee6b678f	17	/* $Id$ */
f7d5860b	18
	19	//*--Author: Sarah Blyth (LBL)
	20	//*--Based on UA1 jet algorithm from LUND JETSET called from EMC-erj
	21
	22	#include "TTask.h"
	23	#include "AliEMCALJetFinderInput.h"
	24	#include "AliEMCALJetFinderOutput.h"
	25	#include "AliEMCALJetFinderAlgo.h"
	26	#include "AliEMCALJetFinderAlgoUA1.h"
	27	#include "AliEMCALJetFinderAlgoUA1Unit.h"
	28	#include "AliEMCALGeometry.h"
	29	#include "AliEMCAL.h"
	30	#include "AliEMCALGetter.h"
	31	#include "AliEMCALDigit.h"
	32	#include "TParticle.h"
	33	#include "AliRun.h"
	34	#include "AliEMCALJet.h"
	35	#include "TMath.h"
	36
	37
	38	ClassImp(AliEMCALJetFinderAlgoUA1)
	39
	40	AliEMCALJetFinderAlgoUA1::AliEMCALJetFinderAlgoUA1()
	41	{
	42	//Default constructor
	43	if (fDebug>0) Info("AliEMCALJetFinderAlgoUA1","Beginning Default Constructor");
	44
	45	fNumIter = 0;
	46	fNumUnits = 13824; //Number of towers in EMCAL
	47	fESeed = 5.0; //Default value
	48	fConeRad = 0.5; //Default value
	49	fJetEMin = 10.0; //Default value
	50	fEtMin = 0.28; //Default value
	51	fMinMove = 0.05; //From original UA1 JetFinder
	52	fMaxMove = 0.15; //From original UA1 JetFinder
	53	fBGMaxMove = 0.035; //From original UA1 JetFinder
	54	fPtCut = 0;
	55	fHadCorr = 0;
	56	fEBGTotal = 1.0; //Set to 1 so that no div by zero in first FindJets() loop
	57	fEBGTotalOld = 0.0;
	58	fEBGAve = 0.0;
	59	fEnergy = 0.0;
	60	fJetEta = 0.0;
	61	fJetPhi = 0.0;
	62	fEtaInit = 0.0;
	63	fPhiInit = 0.0;
	64	fEtaB = 0.0;
	65	fPhiB = 0.0;
	66	fJetESum = 0.0;
	67	fJetEtaSum = 0.0;
	68	fJetPhiSum = 0.0;
	69	fDEta = 0.0;
	70	fDPhi = 0.0;
	71	fDistP = 0.0;
	72	fDistI = 0.0;
	73	fTempE = 0.0;
	74	fRad = 2.0; //Set to 2 to start
	75	fNumInCone = 0;
	76	fNumJets = 0;
	77	fArrayInitialised = 0; //Set to FALSE to start
	78	}
	79
	80	AliEMCALJetFinderAlgoUA1::~AliEMCALJetFinderAlgoUA1()
	81	{
82	//Destructor
83	if (fDebug>0) Info("AliEMCALJetFinderAlgoUA1","Beginning Destructor");
84	delete[] fUnit;
85	}
86
87	void AliEMCALJetFinderAlgoUA1::SetJetFindingParameters
88	(Int_t numUnits, Float_t eSeed, Float_t coneRad, Float_t jetEMin, Float_t etMin,
89	Float_t minMove, Float_t maxMove, Float_t bgMaxMove)
90	{
91	//Sets parameters for the JetFinding algorithm
92	if (fDebug>1) Info("SetJetFindingParameters","Setting parameters for JetFinding");
93
94	SetNumUnits(numUnits);
95	SetJetESeed(eSeed);
96	SetConeRad(coneRad);
97	SetJetEMin(jetEMin);
98	SetEtMin(etMin);
99	SetMinMove(minMove);
100	SetMaxMove(maxMove);
101	SetBGMaxMove(bgMaxMove);
102	}
103
104	void AliEMCALJetFinderAlgoUA1::SetJetFindingParameters
105	(Int_t numUnits, Float_t eSeed, Float_t coneRad, Float_t jetEMin, Float_t etMin)
106	{
107	//Sets fewer parameters for the JetFinding algorithm
108	if (fDebug>1) Info("SetJetFindingParameters","Setting parameters for JetFinding");
109
110	SetNumUnits(numUnits);
111	SetJetESeed(eSeed);
112	SetConeRad(coneRad);
113	SetJetEMin(jetEMin);
114	SetEtMin(etMin);
115	SetMinMove(fMinMove);
116	SetMaxMove(fMaxMove);
117	SetBGMaxMove(fBGMaxMove);
118	}
119
120	void AliEMCALJetFinderAlgoUA1::InitUnitArray()
121	{
122	//Initialises unit array
123	if(fArrayInitialised) delete[] fUnit;
124	fUnit = new AliEMCALJetFinderAlgoUA1Unit[fNumUnits];
125	fArrayInitialised = 1;
126	}
127
128	void AliEMCALJetFinderAlgoUA1::FillUnitArray(AliEMCALJetFinderAlgoUA1FillUnitFlagType_t flag)
129	{
130	if (fDebug>1) Info("FillUnitArray","Beginning FillUnitArray");
131	//AliEMCAL* pEMCAL = (AliEMCAL*) gAlice->GetModule("EMCAL");
132
133	// if (pEMCAL){
134	// AliEMCALGeometry* geom = AliEMCALGeometry::GetInstance(pEMCAL->GetTitle(), "");
135	// }else
136	// {
137	//AliEMCALGeometry* geom = AliEMCALGeometry::GetInstance("EMCAL_5655_21", "");
138	AliEMCALGeometry* geom = AliEMCALGetter::Instance()->EMCALGeometry() ;
139	// }
140
141	AliEMCALJetFinderAlgoUA1FillUnitFlagType_t option = flag;
142	Int_t numTracks, numDigits;
143
144	//Loops over all elements in the AliEMCALJetFinderAlgoUA1Unit array and
145	//fills the objects with relevant values from the Data Input object
146	if (fDebug>1) Info("FillUnitArray","Filling array with Unit objects");
147	if (fDebug>1) Info("FillUnitArray","NTracks %i NDigits %i",fInputPointer->GetNTracks(),fInputPointer->GetNDigits());
148	numTracks = fInputPointer->GetNTracks();
149	numDigits = fInputPointer->GetNDigits();
150	TParticle *myPart;
151	AliEMCALDigit *myDigit;
152
153	//Fill units with Track info if appropriate
154	if(option==kFillTracksOnly \|\| option ==kFillAll)
155	{
156	for(Int_t j=0; j<numTracks; j++)
157	{
158	myPart = fInputPointer->GetTrack(j);
159	Float_t eta = myPart->Eta();
160	Float_t phi = myPart->Phi();
161	Int_t towerID = geom->TowerIndexFromEtaPhi(eta,180.0/TMath::Pi()*phi);
162	Float_t pT = myPart->Pt();
163	Float_t unitEnergy = fUnit[towerID-1].GetUnitEnergy();
164
165	//Do Hadron Correction
166	if(fHadCorr != 0)
167	{
168	Double_t fullP = myPart->P();
169	Double_t hCEnergy = fHadCorr->GetEnergy(fullP, (Double_t)eta);
170	unitEnergy -= hCEnergy*TMath::Sin(myPart->Theta());
171	fUnit[towerID-1].SetUnitEnergy(unitEnergy);
172	} //end Hadron Correction loop
173
174	//Do Pt cut on tracks
175	if(fPtCut != 0 && pT < fPtCut) continue;
176
177	fUnit[towerID-1].SetUnitEnergy(unitEnergy+pT);
178
179	}//end tracks loop
180	}//end Tracks condition
181
182
183	//Fill units with Digit info if appropriate
184	if(option ==kFillDigitsOnly \|\| option ==kFillAll)
185	{
186	for(Int_t k=0; k<numDigits; k++)
187	{
188	myDigit = fInputPointer->GetDigit(k);
189	if (fDebug>1) Info("FillUnitArray","getting digits %i %i numdigits",k,numDigits );
190	Int_t towerID = myDigit->GetId();
191	Int_t amplitude = myDigit->GetAmp(); //Gets the integer valued amplitude of the digit
192	Float_t amp = (Float_t)amplitude; //Need to typecast to Float_t before doing real energy conversion
193	Float_t digitEnergy = amp/10000000.0; //Factor of 10 million needed to convert!
194	Float_t unitEnergy = fUnit[towerID-1].GetUnitEnergy() + digitEnergy;
195	fUnit[towerID-1].SetUnitEnergy(unitEnergy);
196
197	}//end digits loop
198	}//end digits condition
199
200	//Set all unit flags, Eta, Phi
201	for(Int_t i=0; i<fNumUnits; i++)
202	{
203	if (fDebug>1) Info("FillUnitArray","Setting all units outside jets");
204	fUnit[i].SetUnitFlag(kOutJet); //Set all units to be outside a jet initially
205	fUnit[i].SetUnitID(i+1);
206	Float_t eta;
207	Float_t phi;
208	geom->EtaPhiFromIndex(fUnit[i].GetUnitID(), eta, phi);
209	fUnit[i].SetUnitEta(eta);
210	fUnit[i].SetUnitPhi(phi*TMath::Pi()/180.0);
211	// if(i>13000) cout<<"!!!!!!!!!!!!!!!!!For unit0, eta="<<eta<<" and phi="<<phi*TMath::Pi()/180.0<<" and ID="<<fUnit[i].GetUnitID()<<endl;
212	// if(fUnit[i].GetUnitEnergy()>0) cout<<"Unit ID "<<fUnit[i].GetUnitID() <<"with eta="<<eta<<" and phi="<<phi*TMath::Pi()/180.0<<" has energy="<<fUnit[i].GetUnitEnergy()<<endl;
213	}//end loop over all units in array (same as all towers in EMCAL)
214	}
215
216
217	void AliEMCALJetFinderAlgoUA1::Sort(AliEMCALJetFinderAlgoUA1Unit *unit, Int_t length)
218	{
219	//Calls the recursive quicksort method to sort unit objects in decending order of Energy
220	if (fDebug>1) Info("Sort","Sorting Unit objects");
221	QS(unit, 0, length-1);
222	}
223
224
225	void AliEMCALJetFinderAlgoUA1::QS(AliEMCALJetFinderAlgoUA1Unit *unit, Int_t left, Int_t right)
226	{
227	//Sorts the AliEMCALJetFinderAlgoUA1Unit objects in decending order of Energy
228	if (fDebug>111) Info("QS","QuickSorting Unit objects");
229
230	Int_t i;
231	Int_t j;
232	AliEMCALJetFinderAlgoUA1Unit unitFirst;
233	AliEMCALJetFinderAlgoUA1Unit unitSecond;
234
235	i = left;
236	j = right;
237	unitFirst = unit[(left+right)/2];
238
239	do
240	{
241	while( (unit[i].GetUnitEnergy() > unitFirst.GetUnitEnergy()) && (i < right)) i++;
242	while( (unitFirst.GetUnitEnergy() > unit[j].GetUnitEnergy()) && (j > left)) j--;
243
244	if(i <= j)
245	{
246	unitSecond = unit[i];
247	unit[i] = unit[j];
248	unit[j] = unitSecond;
249	i++;
250	j--;
251	}//end if
252	}while(i <= j);
253
254	if(left < j) QS(unit, left, j);
255	if(i < right) QS(unit, i, right);
256	}
257
258
259	void AliEMCALJetFinderAlgoUA1::FindBG()
260	{
261	//Finds the background energy for the iteration
262	if (fDebug>1) Info("FindBG","Finding Average Background");
263
264	fEBGTotal = 0.0;
265	Int_t numCone = 0;
266
267	//Loop over all unit objects in the array and sum the energy of those not in a jet
268	for(Int_t i=0; i<fNumUnits; i++)
269	{
270	if(fUnit[i].GetUnitFlag() != kInJet)
271	fEBGTotal += fUnit[i].GetUnitEnergy();
272	else numCone++;
273	}//end for
274
275	fEBGTotalOld = fEBGTotal;
276	fEBGAve = fEBGTotal / (fNumUnits - numCone);
277	if (fDebug>5) Info("FindBG","Average BG is %f: ",fEBGAve);
278
279	for(Int_t count=0; count<fNumUnits;count++)
280	{
281	fUnit[count].SetUnitFlag(kOutJet);
282	}//end for
283	}
284
285
286	void AliEMCALJetFinderAlgoUA1::FindJetEtaPhi(Int_t counter)
287	{
288	//Finds the eta and phi of the jet axis
289	if (fDebug>1) Info("FindJetEtaPhi","Finding Jet Eta and Phi");
290
291	fDEta = fUnit[counter].GetUnitEta() - fEtaInit;
292	fDPhi = fUnit[counter].GetUnitPhi() - fPhiInit;
293
294	fEnergy = fUnit[counter].GetUnitEnergy() - fEBGAve;
295	fJetEtaSum += fEnergy * fDEta;
296	fJetPhiSum += fEnergy * fDPhi;
297	fJetESum += fEnergy;
298	fJetEta = fEtaInit + (fJetEtaSum / fJetESum);
299	fJetPhi = fPhiInit + (fJetPhiSum / fJetESum);
300	}
301
302
303	void AliEMCALJetFinderAlgoUA1::FindJetEnergy()
304	{
305	//Finds the energy of the jet after the final axis has been found
306	if (fDebug>1) Info("FindJetEnergy","Finding Jet Energy");
307
308	for(Int_t i=0; i<fNumUnits; i++)
309	{
310	//Loop over all unit objects in the array and find if within cone radius
311	Float_t dEta = fUnit[i].GetUnitEta() - fJetEta;
312	Float_t dPhi = fUnit[i].GetUnitPhi() - fJetPhi;
313	Float_t rad = TMath::Sqrt( (dEtadEta) + (dPhidPhi) );
314
315	if(fUnit[i].GetUnitFlag()==kOutJet && rad<= fConeRad)
316	{
317	fUnit[i].SetUnitFlag(kInCurrentJet);
318	Float_t energy = fUnit[i].GetUnitEnergy() - fEBGAve;
319	fJetESum += energy;
320	fJetEtaSum += energy * dEta;
321	fJetPhiSum += energy * dPhi;
322	fNumInCone++; //Increment the number of cells in the jet cone
323	}//end if
324	}//end for
325	}
326
327
328	void AliEMCALJetFinderAlgoUA1::StoreJetInfo()
329	{
330	//Stores the resulting jet information in appropriate storage structure (TO BE DECIDED!!!!)
331	if (fDebug>1) Info("StoreJetInfo","Storing Jet Information");
332
333	//Store:
334	//fJetESum is the final jet energy (background has been subtracted)
335	//fJetEta is the final jet Eta
336	//fJetPhi is the final jet Phi
337	//fNumInCone is the final number of cells included in the jet cone
338	//fEtaInit is the eta of the initiator cell
339	//fPhiInit is the phi of the initiator cell
340	fJet.SetEnergy(fJetESum);
341	fJet.SetEta(fJetEta);
342	fJet.SetPhi(fJetPhi);
343
344	cout<<"For iteration "<<fNumIter <<" and Jet number " <<fNumJets <<endl;
345	cout<<"The jet energy is: " <<fJetESum <<endl;
346	cout<<"The jet eta is ---->" <<fJetEta <<endl;
347	cout<<"The jet phi is ---->" <<fJetPhi <<endl;
348
349	Int_t numberTracks = fInputPointer->GetNTracks();
350	TParticle *myP;
351	Int_t numTracksInCone = 0;
352
353	for(Int_t counter=0; counter<numberTracks; counter++)
354	{
355	myP = fInputPointer->GetTrack(counter);
356	Float_t eta = myP->Eta();
357	Float_t phi = myP->Phi();
358	Float_t deta = fJetEta-eta;
359	Float_t dphi = fJetPhi -phi;
360	Float_t rad = TMath::Sqrt( (detadeta) + (dphidphi));
361	if(rad<=fConeRad) numTracksInCone++;
362	}//end for
363
364	Float_t *pTArray = new Float_t[numTracksInCone];
365	Float_t *etaArray = new Float_t[numTracksInCone];
366	Float_t *phiArray = new Float_t[numTracksInCone];
367	Int_t *pdgArray = new Int_t[numTracksInCone];
368	Int_t index = 0;
369
370	for(Int_t counter2=0; counter2<numberTracks; counter2++)
371	{
372	myP = fInputPointer->GetTrack(counter2);
373	Float_t eta = myP->Eta();
374	Float_t phi = myP->Phi();
375	Float_t deta = fJetEta-eta;
376	Float_t dphi = fJetPhi -phi;
377	Float_t rad = TMath::Sqrt( (detadeta) + (dphidphi));
378	if(rad<=fConeRad)
379	{
380	pTArray[index] = myP->Pt();
381	etaArray[index] = eta;
382	phiArray[index] = phi;
383	pdgArray[index] = myP->GetPdgCode();
384	index++;
385	}//end if
386	}//end for
387
388	fJet.SetTrackList(numTracksInCone,pTArray, etaArray, phiArray, pdgArray);
389	fOutputObject.AddJet(&fJet);
390	delete[] pTArray;
391	delete[] etaArray;
392	delete[] phiArray;
393	delete[] pdgArray;
394	}
395
396
397	void AliEMCALJetFinderAlgoUA1::FindJets()
398	{
399	//Runs the complete UA1 JetFinding algorithm to find jets!
400	if (fDebug>1) Info("FindJets","Starting Jet Finding!!!");
401
402	//If the array of JetFinderUnit objects has not been initialised then initialise with default settings
403	if(!fArrayInitialised)
404	{
405	InitUnitArray();
406	FillUnitArray(kFillAll);
407	}//end if
408	if (fDebug>1) Info("FindJets","Unit array filled");
409
410	//Step 1. Sort the array in descending order of Energy
411	Sort(fUnit,fNumUnits);
412
413	//Step 2. Set the number of iterations and Number of jets found to zero to start
414	fNumIter = 0;
415	fNumJets = 0;
416
417	//Step 3. Begin the iteration loop to find jets
418	//Need to iterate the algorithm while number of iterations<2 OR number of iterations<10 AND
419	//the value of the average background has changed more than specified amount
420	//Min iterations = 2, Max iterations = 10
421	//while(fNumIter<2 \|\| (fNumIter <10 && ( (fEBGTotal-fEBGTotalOld)/fEBGTotal) > fBGMaxMove) )
422
423	while(fNumIter<2 \|\| (fNumIter <10 && ( fEBGTotal-fEBGTotalOld) > fEBGTotal*fBGMaxMove) )
424	{
425	if (fDebug>1) Info("FindJets","Starting BIG iteration ---> %i",fNumIter);
426
427	//Step 4. Find the value of the average background energy
428	FindBG();
429	fOutputObject.Reset(kResetJets); //Reset output object to store info for new iteration
430	fNumJets=0;
431
432	//Loop over the array of unit objects and flag those with energy below MinCellEt
433	Int_t numbelow = 0;
434	for(Int_t j=0; j<fNumUnits; j++)
435	{
436	if( (fUnit[j].GetUnitEnergy()-fEBGAve) < fEtMin)
437	{
438	fUnit[j].SetUnitFlag(kBelowMinEt);
439	numbelow++;
440	// if (fDebug>1) Info("FindJets","Below Min Et: %i",j);
441	}//end if
442	}//end for
443
444	//Do quick check if there are no jets upfront
445	if(fUnit[0].GetUnitFlag() == kBelowMinEt)
446	{
447	cout <<"There are no jets for this event!" <<endl;
448	break;
449	}//end if
450
451	//Step 5. Begin with the first jet candidate cell (JET SEED LOOP)
452	if (fDebug>5) Info("FindJets","Beginning JET SEED LOOP");
453	for(Int_t count=0; count<fNumUnits; count++)
454	{
455
456	//CHECK CONDITION HERE _ NOT SURE IF SHOULD MAYBE BE: GetUnitEnergy()-fEBGAve >fESeed?????????????????????????????
457	if(fUnit[count].GetUnitEnergy()>=fESeed && fUnit[count].GetUnitFlag()==kOutJet)
458	{
459	fEnergy = fUnit[count].GetUnitEnergy() - fEBGAve;
460	fJetEta = fUnit[count].GetUnitEta();
461	fJetPhi = fUnit[count].GetUnitPhi();
462	if (fDebug>5) Info("FindJets","Inside first candidate jet seed loop for time : %i", count);
463	if (fDebug>5) Info("FindJets","Found candidate energy %f ",fEnergy);
464	if (fDebug>5) Info("FindJets","Found candidate eta %f ", fJetEta);
465	if (fDebug>5) Info("FindJets","Found candidate phi %f ", fJetPhi);
466
467	fEtaInit = fJetEta;
468	fPhiInit = fJetPhi;
469	fEtaB = fJetEta;
470	fPhiB = fJetPhi;
471	fJetESum = 0.0;
472	fJetEtaSum = 0.0;
473	fJetPhiSum = 0.0;
474
475	//Step 6. Find Jet Eta and Phi
476	//Loop over all units in the array to find the ones in the jet cone and determine contrib to Jet eta, phi
477	for(Int_t count1=0; count1<fNumUnits; count1++)
478	//for(Int_t count1=fNumUnits-1; count1>=0; count1--) //Alternative method (will not break on first loop)
479	{
480	if(fUnit[count1].GetUnitFlag() == kOutJet)
481	{
482	fDEta = fUnit[count1].GetUnitEta() - fJetEta;
483	fDPhi = fUnit[count1].GetUnitPhi() - fJetPhi;
484	fRad = TMath::Sqrt( (fDEtafDEta) + (fDPhifDPhi) );
485	if(fRad <= fConeRad)
486	{
487	FindJetEtaPhi(count1);
488
489
490	//check if cone moves less than minimum allowed move from previous cone
491	if (fDebug>10) Info("FindJets","Checking if cone move small enough");
492	fDistP = TMath::Sqrt( ((fJetEta-fEtaB)(fJetEta-fEtaB)) + ((fJetPhi-fPhiB)(fJetPhi-fPhiB)) );
493	if(fDistP <= fMinMove) break;
494
495
496	//check if cone moves more than max allowed from initiator cell
497	if (fDebug>10) Info("FindJets","Checking if cone move too large");
498	fDistI = TMath::Sqrt( ((fJetEtaSum/fJetESum)(fJetEtaSum/fJetESum)) + ((fJetPhiSum/fJetESum)
499	(fJetPhiSum/fJetESum)));
500	if(fDistI >= fMaxMove)
501	{
502	fJetEta = fEtaB;
503	fJetPhi = fPhiB;
504	break;
505	}//end if
506
507	fEtaB = fJetEta;
508	fPhiB = fJetPhi;
509	}//end if
510	}//end if
511	}//end for (Jet Eta, Phi LOOP)
512
513	//Step 7. Find the Jet Energy
514	if (fDebug>1) Info("FindJets","Looking for Jet energy");
515	fJetESum = 0.0;
516	fJetEtaSum = 0.0;
517	fJetPhiSum = 0.0;
518	fNumInCone = 0;
519	FindJetEnergy();
520
521	//Step 8. Check if the jet is a valid jet
522	//Check if cluster energy is above Min allowed to be a jet
523	//DID NOT DO THE COSH COMPARISON HERE -> NEED TO CHECK WHICH COMPARISON IS BEST!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
524	if (fDebug>5) Info("FindJets","Checking cluster is valid jet");
525	if(fJetESum < fJetEMin)
526	{
527	for(Int_t count2=0; count2<fNumUnits; count2++)
528	{
529	if(fUnit[count2].GetUnitFlag()==kInCurrentJet \|\| fUnit[count2].GetUnitFlag()==kOutJet)
530	fUnit[count2].SetUnitFlag(kOutJet);
531	}//end for
532	if (fDebug>10) Info("FindJets","NOT a valid jet cell");
533	}else
534	{
535	for(Int_t count2=0; count2<fNumUnits; count2++)
536	{
537	if(fUnit[count2].GetUnitFlag()==kInCurrentJet)
538	{
539	// cout<<"Setting unit #"<<count2 <<" to be officially in a jet!"<<endl;
540	fUnit[count2].SetUnitFlag(kInJet);
541	}
542	}//end for
543
544	//NEED TO CHECK FINAL WEIRD ITERATION OF ETA AND PHI CHANGES!!!!!!!!!
545	fJetPhi += fJetPhiSum/fJetESum; //CHECK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
546	fJetEta += fJetEtaSum/fJetESum; //CHECK!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
547
548	fNumJets++; //Incrementing number of jets found
549	StoreJetInfo(); //Storing jet info
550	}//end if (check cluster above Min Jet Energy)
551
552	}//end if (Jet Seed condition)
553	}//end (JET SEED LOOP)
554
555	if (fDebug>5) Info("FindJets","End of BIG iteration number %i",fNumIter);
556	// this->Dump();
557	fNumIter++;
558	}//end 10 iteration WHILE LOOP
559	}
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