dnadamage1/src/PrimaryGeneratorAction.cc

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
0004 // *                                                                  *
0005 // * The  Geant4 software  is  copyright of the Copyright Holders  of *
0006 // * the Geant4 Collaboration.  It is provided  under  the terms  and *
0007 // * conditions of the Geant4 Software License,  included in the file *
0008 // * LICENSE and available at  http://cern.ch/geant4/license .  These *
0009 // * include a list of copyright holders.                             *
0010 // *                                                                  *
0011 // * Neither the authors of this software system, nor their employing *
0012 // * institutes,nor the agencies providing financial support for this *
0013 // * work  make  any representation or  warranty, express or implied, *
0014 // * regarding  this  software system or assume any liability for its *
0015 // * use.  Please see the license in the file  LICENSE  and URL above *
0016 // * for the full disclaimer and the limitation of liability.         *
0017 // *                                                                  *
0018 // * This  code  implementation is the result of  the  scientific and *
0019 // * technical work of the GEANT4 collaboration.                      *
0020 // * By using,  copying,  modifying or  distributing the software (or *
0021 // * any work based  on the software)  you  agree  to acknowledge its *
0022 // * use  in  resulting  scientific  publications,  and indicate your *
0023 // * acceptance of all terms of the Geant4 Software license.          *
0024 // ********************************************************************
0025 //
0026 //
0027 /// \file PrimaryGeneratorAction.cc
0028 /// \brief Implementation of the PrimaryGeneratorAction class
0029
0030 #include "PrimaryGeneratorAction.hh"
0031
0032 #include "G4ParticleGun.hh"
0033 #include "Randomize.hh"
0034
0035 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0036
0037 PrimaryGeneratorAction::PrimaryGeneratorAction()
0038   : G4VUserPrimaryGeneratorAction(), fpParticleGun(nullptr)
0039 {
0040   G4int n_particle = 1;
0041   fpParticleGun.reset(new G4ParticleGun(n_particle));
0042
0043   // default gun parameters
0044   fpParticleGun->SetParticleEnergy(10. * CLHEP::keV);
0045   fpParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
0046   fpParticleGun->SetParticlePosition(G4ThreeVector(0., 0., -20. * CLHEP::nm));
0047 }
0048
0049 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0050
0051 PrimaryGeneratorAction::~PrimaryGeneratorAction() {}
0052
0053 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0054
0055 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0056 {
0057   G4double randomx = -1 + 2 * G4UniformRand();
0058   G4double randomy = -1 + 2 * G4UniformRand();
0059   fpParticleGun->SetParticlePosition(
0060     G4ThreeVector(10. * randomx * CLHEP::nm, 10. * randomy * CLHEP::nm, -20. * CLHEP::nm));
0061   fpParticleGun->GeneratePrimaryVertex(anEvent);
0062 }