#include "PrimaryGeneratorAction.h"

#include "G4ParticleTable.hh"
#include "G4SystemOfUnits.hh"

PrimaryGeneratorAction::PrimaryGeneratorAction() {
    auto table = G4ParticleTable::GetParticleTable();

    fParticleGun = new G4ParticleGun(1);
    fParticleGun->SetParticleDefinition(table->FindParticle("gamma"));
    fParticleGun->SetParticlePosition(G4ThreeVector(0, 0, 555. / 2 * mm));
    fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0, 0, -1));
    fParticleGun->SetParticleEnergy(1 * MeV);
}

PrimaryGeneratorAction::~PrimaryGeneratorAction() { delete fParticleGun; }

void PrimaryGeneratorAction::GeneratePrimaries(G4Event* e) { fParticleGun->GeneratePrimaryVertex(e); }