#define ReadLHE_cxx
#include "ReadLHE.h"
#include <TH2.h>
#include <TStyle.h>
#include <TCanvas.h>
#include "TLorentzVector.h"

void ReadLHE::Loop()
{
//   In a ROOT session, you can do:
//      Root > .L ReadLHE.C
//      Root > ReadLHE t
//      Root > t.GetEntry(12); // Fill t data members with entry number 12
//      Root > t.Show();       // Show values of entry 12
//      Root > t.Show(16);     // Read and show values of entry 16
//      Root > t.Loop();       // Loop on all entries
//

//     This is the loop skeleton where:
//    jentry is the global entry number in the chain
//    ientry is the entry number in the current Tree
//  Note that the argument to GetEntry must be:
//    jentry for TChain::GetEntry
//    ientry for TTree::GetEntry and TBranch::GetEntry
//
//       To read only selected branches, Insert statements like:
// METHOD1:
//    fChain->SetBranchStatus("*",0);  // disable all branches
//    fChain->SetBranchStatus("branchname",1);  // activate branchname
// METHOD2: replace line
//    fChain->GetEntry(jentry);       //read all branches
//by  b_branchname->GetEntry(ientry); //read only this branch
   if (fChain == 0) return;

   Long64_t nentries = fChain->GetEntriesFast();

   Long64_t nbytes = 0, nb = 0;
   //for (Long64_t jentry=0; jentry<nentries;jentry++) {
   for (Long64_t jentry=0; jentry<2;jentry++) {
      Long64_t ientry = LoadTree(jentry);
      if (ientry < 0) break;
      nb = fChain->GetEntry(jentry);   nbytes += nb;
     cout<<"nb = "<<nb<<endl; 
     nb = b_Particle_E->GetEntry(jentry);
     cout<<"nb = "<<nb<<endl; 
     int quakr_count = 0;
  for (int im = 0; im<6; im++){
       cout<<im<<"\tParticle_Py = "<<Particle_E[im]<<endl;
       cout<<im<<"\tParticle_PID = "<<Particle_PID[im]<<endl;
	if ((fabs(Particle_PID[im]) < 9) || fabs(Particle_PID[im]) == 21)
	{quakr_count++;
	cout<<"quakr_count = "<<quakr_count<<endl;
	if( quakr_count==1){
cout<<"px, py, pz, E "<<Particle_Px[im]<<"\t"<< Particle_Py[im]<<"\t"<< Particle_Pz[im]<<"\t"<< Particle_E[im]	<<endl;
       //TLorentzVector Iqrk0(Particle_Px[im], Particle_Py[im], Particle_Pz[im], Particle_E[im]);
       TLorentzVector Iqrk0;
       Iqrk0.SetPxPyPzE(Particle_Px[im], Particle_Py[im], Particle_Pz[im], Particle_E[im]);
}
       if (quakr_count==2)
cout<<"px, py, pz, E "<<Particle_Px[im]<<"\t"<< Particle_Py[im]<<"\t"<< Particle_Pz[im]<<"\t"<< Particle_E[im]	<<endl;
       if (quakr_count==3)
cout<<"px, py, pz, E "<<Particle_Px[im]<<"\t"<< Particle_Py[im]<<"\t"<< Particle_Pz[im]<<"\t"<< Particle_E[im]	<<endl;
       if (quakr_count==4)
cout<<"px, py, pz, E "<<Particle_Px[im]<<"\t"<< Particle_Py[im]<<"\t"<< Particle_Pz[im]<<"\t"<< Particle_E[im]	<<endl;
//       TLorentzVector Iqrk1
//       (
//	Particle_Px[im], Particle_Py[im], Particle_Pz[im], Particle_E[im]		
//       );
       }
 }
      // if (Cut(ientry) < 0) continue;
   }
}