slowing/src/PrimaryGeneratorAction.cc

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0025 //
0026 // This example is provided by the Geant4-DNA collaboration
0027 // Any report or published results obtained using the Geant4-DNA software
0028 // shall cite the following Geant4-DNA collaboration publications:
0029 // Med. Phys. 45 (2018) e722-e739
0030 // Phys. Med. 31 (2015) 861-874
0031 // Med. Phys. 37 (2010) 4692-4708
0032 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
0033 //
0034 // The Geant4-DNA web site is available at http://geant4-dna.org
0035 //
0036 /// \file medical/dna/slowing/src/PrimaryGeneratorAction.cc
0037 /// \brief Implementation of the PrimaryGeneratorAction class
0038
0039 #include "PrimaryGeneratorAction.hh"
0040
0041 #include "G4ParticleTable.hh"
0042 #include "G4RandomDirection.hh"
0043 #include "G4StateManager.hh"
0044 #include "G4SystemOfUnits.hh"
0045
0046 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0047
0048 PrimaryGeneratorAction::PrimaryGeneratorAction() : G4VUserPrimaryGeneratorAction(), fpParticleGun(0)
0049 {
0050   G4int n_particle = 1;
0051   fpParticleGun = new G4ParticleGun(n_particle);
0052
0053   G4ParticleDefinition* particle = G4ParticleTable::GetParticleTable()->FindParticle("e-");
0054   fpParticleGun->SetParticleDefinition(particle);
0055   fpParticleGun->SetParticleEnergy(100 * eV);
0056   fpParticleGun->SetParticlePosition(G4ThreeVector(0., 0., 0.));
0057   fpParticleGun->SetParticleMomentumDirection(G4RandomDirection());
0058 }
0059
0060 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0061
0062 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0063 {
0064   G4StateManager::GetStateManager()->DeregisterDependent(this);
0065   if (fpParticleGun) delete fpParticleGun;
0066 }
0067
0068 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0069
0070 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0071 {
0072   fpParticleGun->GeneratePrimaryVertex(anEvent);
0073 }
0074
0075 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0076
0077 G4bool PrimaryGeneratorAction::Notify(G4ApplicationState requestedState)
0078 {
0079   if (requestedState == G4State_Idle) {
0080     if (fpParticleGun != 0) return true;
0081
0082     fpParticleGun = new G4ParticleGun(1);
0083
0084     // Define default primary
0085     G4ParticleDefinition* particle = G4ParticleTable::GetParticleTable()->FindParticle("e-");
0086     fpParticleGun->SetParticleDefinition(particle);
0087     fpParticleGun->SetParticleEnergy(100 * eV);
0088     fpParticleGun->SetParticlePosition(G4ThreeVector(0., 0., 0.));
0089     fpParticleGun->SetParticleMomentumDirection(G4RandomDirection());
0090   }
0091
0092   return true;
0093 }