wholeNuclearDNA/src/PrimaryGeneratorAction.cc

0001 //
0002 // ********************************************************************
0003 // * License and Disclaimer                                           *
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0024 // ********************************************************************
0025 //
0026 // This example is provided by the Geant4-DNA collaboration
0027 // Any report or published results obtained using the Geant4-DNA software
0028 // and the DNA geometry given in the Geom_DNA example
0029 // shall cite the following Geant4-DNA collaboration publications:
0030 // [1] NIM B 298 (2013) 47-54
0031 // [2] Med. Phys. 37 (2010) 4692-4708
0032 // The Geant4-DNA web site is available at http://geant4-dna.org
0033 //
0034 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0035 /// \file PrimaryGeneratorAction.cc
0036 /// \brief Implementation of the PrimaryGeneratorAction class
0037
0038 #include "PrimaryGeneratorAction.hh"
0039
0040 #include "G4SystemOfUnits.hh"
0041 #include "Randomize.hh"
0042
0043 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0044
0045 PrimaryGeneratorAction::PrimaryGeneratorAction() : G4VUserPrimaryGeneratorAction(), fpParticleGun(0)
0046 {
0047   G4int n_particle = 1;
0048   fpParticleGun = new G4ParticleGun(n_particle);
0049
0050   // default gun parameters
0051   fpParticleGun->SetParticleEnergy(1. * keV);
0052   fpParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
0053 }
0054
0055 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0056
0057 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0058 {
0059   delete fpParticleGun;
0060 }
0061
0062 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0063
0064 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0065 {
0066   G4double x0, y0, z0;
0067
0068   x0 = ((16.0 * G4UniformRand()) - 8.0) * micrometer;
0069   y0 = ((8.0 * G4UniformRand()) - 4.0) * micrometer;
0070   z0 = -2.99 * micrometer;
0071   fpParticleGun->SetParticlePosition(G4ThreeVector(x0, y0, z0));
0072   fpParticleGun->GeneratePrimaryVertex(anEvent);
0073 }