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//
// This example is provided by the Geant4-DNA collaboration
// Any report or published results obtained using the Geant4-DNA software
// shall cite the following Geant4-DNA collaboration publication:
// Med. Phys. 37 (2010) 4692-4708
// J. Comput. Phys. 274 (2014) 841-882
// Phys. Med. Biol. 63(10) (2018) 105014-12pp
// The Geant4-DNA web site is available at http://geant4-dna.org
//
//
/// \file PrimaryGeneratorAction.cc
/// \brief Implementation of the PrimaryGeneratorAction class

#include "PrimaryGeneratorAction.hh"

#include "G4RunManager.hh"
#include "G4Event.hh"
#include "G4ParticleGun.hh"
#include "G4ParticleTable.hh"
#include "G4IonTable.hh"
#include "G4ParticleDefinition.hh"
#include "G4ChargedGeantino.hh"
#include "G4SystemOfUnits.hh"
#include "Randomize.hh"
#include "G4UnitsTable.hh"

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......

PrimaryGeneratorAction::PrimaryGeneratorAction()
 : G4VUserPrimaryGeneratorAction(),
   fParticleGun(0)
{
  G4int n_particle = 1;
  fParticleGun  = new G4ParticleGun(n_particle);

  // default particle kinematic
  G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
  G4ParticleDefinition* particle=
  particleTable->FindParticle("e-");
  fParticleGun->SetParticleDefinition(particle);
  fParticleGun->SetParticlePosition(G4ThreeVector(-0.0024, -0.0019, 0.00023));
  fParticleGun->SetParticleEnergy(884*keV);
  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,1.));
}

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

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void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
{
  if(anEvent->GetEventID() == 0)
  {
    G4cout << "Particle: "
    << fParticleGun->GetParticleDefinition()->GetParticleName()
    << " with "
    << G4BestUnit(fParticleGun->GetParticleEnergy(), "Energy")
    << G4endl;
  }
  G4cout << "Start event " << anEvent->GetEventID() << G4endl;
  fParticleGun->GeneratePrimaryVertex(anEvent);
}

//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......