mfp/src/PrimaryGeneratorAction.cc

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0026 // This example is provided by the Geant4-DNA collaboration
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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 //
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0035 //
0036 /// \file PrimaryGeneratorAction.cc
0037 /// \brief Implementation of the PrimaryGeneratorAction class
0038
0039 #include "PrimaryGeneratorAction.hh"
0040
0041 #include "DetectorConstruction.hh"
0042
0043 #include "G4RunManager.hh"
0044 #include "G4StateManager.hh"
0045 #include "G4SystemOfUnits.hh"
0046
0047 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0048
0049 PrimaryGeneratorAction::PrimaryGeneratorAction()
0050   : G4VUserPrimaryGeneratorAction(), G4VStateDependent(), fParticleGun(0), fDetector(0)
0051 {
0052   fDetector = dynamic_cast<const DetectorConstruction*>(
0053     G4RunManager::GetRunManager()->GetUserDetectorConstruction());
0054 }
0055
0056 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0057
0058 PrimaryGeneratorAction::~PrimaryGeneratorAction()
0059 {
0060   G4StateManager::GetStateManager()->DeregisterDependent(this);
0061   if (fParticleGun) delete fParticleGun;
0062 }
0063
0064 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0065
0066 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
0067 {
0068   fParticleGun->SetParticlePosition(G4ThreeVector());
0069   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1, 0, 0));
0070   fParticleGun->GeneratePrimaryVertex(anEvent);
0071 }
0072
0073 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0074
0075 G4bool PrimaryGeneratorAction::Notify(G4ApplicationState requestedState)
0076 {
0077   if (requestedState == G4State_Idle) {
0078     if (fParticleGun != 0) return true;
0079
0080     fParticleGun = new G4ParticleGun(1);
0081
0082     // Define default primary
0083     G4ParticleDefinition* particle = G4ParticleTable::GetParticleTable()->FindParticle("e-");
0084     fParticleGun->SetParticleDefinition(particle);
0085     fParticleGun->SetParticleEnergy(10 * eV);
0086     fParticleGun->SetParticlePosition(G4ThreeVector());
0087     fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1, 0, 0));
0088   }
0089
0090   return true;
0091 }