source: git/examples/Example5.C

/*
Prints complete input particle arborescence for the first 10 events. Useful for debugging purposes.
root -l examples/Example5.C'("delphes_output.root")'
*/

#ifdef __CLING__
R__LOAD_LIBRARY(libDelphes)
#include "classes/DelphesClasses.h"
#include "external/ExRootAnalysis/ExRootTreeReader.h"
#include "external/ExRootAnalysis/ExRootResult.h"
#else
class ExRootTreeReader;
class ExRootResult;
#endif


//------------------------------------------------------------------------------

void Example5(const char *inputFile)
{
  gSystem->Load("libDelphes");

  // Create chain of root trees
  TChain chain("Delphes");
  chain.Add(inputFile);

  // Create object of class ExRootTreeReader
  ExRootTreeReader *treeReader = new ExRootTreeReader(&chain);
  Long64_t numberOfEntries = treeReader->GetEntries();

  // Get pointers to branches used in this analysis
  TClonesArray *branchParticle = treeReader->UseBranch("Particle");

  // Loop over all events
  for(Int_t entry = 0; entry < numberOfEntries; ++entry)
  {
    // Load selected branches with data from specified event
    treeReader->ReadEntry(entry);

    if(entry>10) break;

    cout<<"" <<endl;
    cout<<"--------- New Event ---------" <<endl;
    cout<<"" <<endl;

    // loop over all input particles in the event
    for(Int_t i=0; i < branchParticle->GetEntriesFast(); i++)
    {
     GenParticle *gen = (GenParticle*) branchParticle->At(i);
     cout<<"N: "<<i<<", St: "<<gen->Status<<", PID: "<<gen->PID<<", E: "<<gen->E<<", Px: "<<gen->Px<<", Py: "<<gen->Py<<", Pz: "<<gen->Pz<<", M: "<<gen->Mass<<", T: "<<gen->T<<", X: "<<gen->X<<", Y: "<<gen->Y<<", Z: "<<gen->Z<<", M1: "<<gen->M1<<", M2: "<<gen->M2<<", D1: "<<gen->D1<<", D2: "<<gen->D2<<endl;
    }
  }
}