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Geant4/examples/extended/electromagnetic/TestEm15/src/PrimaryGeneratorAction.cc

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 25 //
 26 /// \file electromagnetic/TestEm15/src/PrimaryGeneratorAction.cc
 27 /// \brief Implementation of the PrimaryGeneratorAction class
 28 //
 29 //
 30 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 32 
 33 #include "PrimaryGeneratorAction.hh"
 34 
 35 #include "DetectorConstruction.hh"
 36 
 37 #include "G4Event.hh"
 38 #include "G4ParticleDefinition.hh"
 39 #include "G4ParticleTable.hh"
 40 #include "G4SystemOfUnits.hh"
 41 
 42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 43 
 44 PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* det)
 45   : G4VUserPrimaryGeneratorAction(), fParticleGun(0), fDetector(det)
 46 {
 47   fParticleGun = new G4ParticleGun(1);
 48   G4ParticleDefinition* particle = G4ParticleTable::GetParticleTable()->FindParticle("e-");
 49   fParticleGun->SetParticleDefinition(particle);
 50   fParticleGun->SetParticleEnergy(1 * MeV);
 51   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(1., 0., 0.));
 52 }
 53 
 54 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 55 
 56 PrimaryGeneratorAction::~PrimaryGeneratorAction()
 57 {
 58   delete fParticleGun;
 59 }
 60 
 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 62 
 63 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
 64 {
 65   // this function is called at the begining of event
 66   //
 67   G4double halfSize = 0.5 * (fDetector->GetWorldSize());
 68   G4double x0 = -halfSize;
 69 
 70   fParticleGun->SetParticlePosition(G4ThreeVector(x0, 0., 0.));
 71   fParticleGun->GeneratePrimaryVertex(anEvent);
 72 }
 73 
 74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 75