Use Geant4's user "hooks" to maintain a list of particles generated by Geant4. More...

#include "larsim/LegacyLArG4/ParticleListAction.h"
#include "lardataobj/Simulation/sim.h"
#include "nug4/G4Base/PrimaryParticleInformation.h"
#include "nug4/ParticleNavigation/ParticleList.h"
#include "cetlib_except/exception.h"
#include "messagefacility/MessageLogger/MessageLogger.h"
#include "Geant4/G4DynamicParticle.hh"
#include "Geant4/G4ParticleDefinition.hh"
#include "Geant4/G4PrimaryParticle.hh"
#include "Geant4/G4Step.hh"
#include "Geant4/G4StepPoint.hh"
#include "Geant4/G4String.hh"
#include "Geant4/G4ThreeVector.hh"
#include "Geant4/G4Track.hh"
#include "Geant4/G4VProcess.hh"
#include "Geant4/G4VUserPrimaryParticleInformation.hh"
#include <TLorentzVector.h>
#include <algorithm>
#include <cassert>

Classes
class	larg4::UpdateDaughterInformation

Namespaces
	larg4
	Geant4 interface.

Variables
double	globalTime

double	velocity_G4

double	velocity_step

bool	entra = true

Detailed Description

Use Geant4's user "hooks" to maintain a list of particles generated by Geant4.

Author: selig.nosp@m.man@.nosp@m.nevis.nosp@m..col.nosp@m.umbia.nosp@m..edu

Design considerations

This class relies on the MCTruth index from g4b::PrimaryParticleInformation to operate correctly. This index is an integer value that corresponds to an MCTruth object, as accessed through art::Handle<std::vector<simb::MCTruth>> objects. However, the order in which MCTruth objects are processed must be consistent between this service and the MCTruthEventAction service, which creates the PrimaryParticleInformation object, otherwise the Assns objects created here will be incorrect.

Through art 3.09, one can rely on the order returned by a given Event::getMany call to be predictable and consistent within the same program. However, this behavior should not necessarily be relied upon, and a different implementation of this class would insulate users from such details, making the implementation simpler. One should determine whether storing an art::ProductID object along with an MCTruthIndex might be more helpful.