GarfieldPrimaryGeneratorAction.cc

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/// \file GarfieldPrimaryGeneratorAction.cc
/// \brief Implementation of the GarfieldPrimaryGeneratorAction class
 
#include "GarfieldPrimaryGeneratorAction.hh"
 
#include "G4Box.hh"
#include "G4Event.hh"
#include "G4LogicalVolume.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4ParticleDefinition.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "G4RunManager.hh"
#include "G4SystemOfUnits.hh"
#include "Randomize.hh"
 
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GarfieldPrimaryGeneratorAction::GarfieldPrimaryGeneratorAction()
    : G4VUserPrimaryGeneratorAction(), fParticleGun(0) {
  G4int nofParticles = 1;
  fParticleGun = new G4ParticleGun(nofParticles);
 
  // default particle kinematic
  //
  /*
  G4ParticleDefinition* particleDefinition
    = G4ParticleTable::GetParticleTable()->FindParticle("e-");
  fParticleGun->SetParticleDefinition(particleDefinition);
  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
  fParticleGun->SetParticleEnergy(50.*MeV);
  */
}
 
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GarfieldPrimaryGeneratorAction::~GarfieldPrimaryGeneratorAction() {
  delete fParticleGun;
}
 
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void GarfieldPrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) {
  // This function is called at the begining of event
 
  /*
  G4double worldZHalfLength = 0;
  G4LogicalVolume* worldLV 
      = G4LogicalVolumeStore::GetInstance()->GetVolume("World");
  G4Box* worldBox = nullptr;
  if (worldLV) worldBox = dynamic_cast<G4Box*>(worlLV->GetSolid());
  if (worldBox) {
    worldZHalfLength = worldBox->GetZHalfLength();
  } else {
    G4ExceptionDescription msg;
    msg << "World volume of box not found." << G4endl;
    msg << "Perhaps you have changed geometry." << G4endl;
    msg << "The gun will be place in the center.";
    G4Exception("GarfieldPrimaryGeneratorAction::GeneratePrimaries()",
                "MyCode0002", JustWarning, msg);
  }
  // Set gun position
  fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., -worldZHalfLength));
  */
  fParticleGun->GeneratePrimaryVertex(anEvent);
}
 
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