wholeNuclearDNA/src/PrimaryGeneratorAction.cc

0001 //
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0025 //
0026 /// \file PrimaryGeneratorAction.cc
0027 /// \brief Implementation of the PrimaryGeneratorAction class
0028
0029 // This example is provided by the Geant4-DNA collaboration
0030 // Any report or published results obtained using the Geant4-DNA software
0031 // and the DNA geometry given in the Geom_DNA example
0032 // shall cite the following Geant4-DNA collaboration publications:
0033 // [1] NIM B 298 (2013) 47-54
0034 // [2] Med. Phys. 37 (2010) 4692-4708
0035 // The Geant4-DNA web site is available at http://geant4-dna.org
0036 //
0037 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
0038
0039 #include "PrimaryGeneratorAction.hh"
0040
0041 #include "G4SystemOfUnits.hh"
0042 #include "Randomize.hh"
0043
0044 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0045
0046 PrimaryGeneratorAction::PrimaryGeneratorAction() : G4VUserPrimaryGeneratorAction(), fpParticleGun(0)
0047 {
0048   G4int n_particle = 1;
0049   fpParticleGun = new G4ParticleGun(n_particle);
0050
0051   // default gun parameters
0052   fpParticleGun->SetParticleEnergy(1. * keV);
0053   fpParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
0054 }
0055
0056 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0057
0058 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0059 {
0060   delete fpParticleGun;
0061 }
0062
0063 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0064
0065 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0066 {
0067   G4double x0, y0, z0;
0068
0069   x0 = ((16.0 * G4UniformRand()) - 8.0) * micrometer;
0070   y0 = ((8.0 * G4UniformRand()) - 4.0) * micrometer;
0071   z0 = -2.99 * micrometer;
0072   fpParticleGun->SetParticlePosition(G4ThreeVector(x0, y0, z0));
0073   fpParticleGun->GeneratePrimaryVertex(anEvent);
0074 }