Geant4 Cross Reference

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Geant4/examples/extended/hadronic/Hadr02/src/PrimaryGeneratorAction.cc

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 25 //
 26 /// \file hadronic/Hadr02/src/PrimaryGeneratorAction.cc
 27 /// \brief Implementation of the PrimaryGeneratorAction class
 28 //
 29 //
 30 /////////////////////////////////////////////////////////////////////////
 31 //
 32 // EventActionMessenger
 33 //
 34 // Created: 31.01.03 V.Ivanchenko
 35 //
 36 // Modified:
 37 // 04.06.2006 Adoptation of hadr01 (V.Ivanchenko)
 38 // 16.11.2006 Add option allowing to have user defined beam position (VI)
 39 //
 40 ////////////////////////////////////////////////////////////////////////
 41 //
 42 
 43 #include "PrimaryGeneratorAction.hh"
 44 
 45 #include "HistoManager.hh"
 46 
 47 #include "G4Event.hh"
 48 #include "G4ParticleGun.hh"
 49 #include "G4SystemOfUnits.hh"
 50 
 51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 52 
 53 PrimaryGeneratorAction::PrimaryGeneratorAction()
 54   : G4VUserPrimaryGeneratorAction(), fParticleGun(0), fHisto(0)
 55 {
 56   fParticleGun = new G4ParticleGun(1);
 57   fParticleGun->SetParticleMomentumDirection(G4ThreeVector(0., 0., 1.));
 58   fHisto = HistoManager::GetPointer();
 59 }
 60 
 61 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 62 
 63 PrimaryGeneratorAction::~PrimaryGeneratorAction()
 64 {
 65   delete fParticleGun;
 66 }
 67 
 68 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 69 
 70 void PrimaryGeneratorAction::GeneratePrimaries(G4Event* event)
 71 {
 72   if (event->GetEventID() == 0) {
 73     if (fHisto->DefaultBeamPosition()) {
 74       G4double zVertex = -(5.0 * mm + fHisto->Length());
 75       fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., zVertex));
 76     }
 77   }
 78   fParticleGun->GeneratePrimaryVertex(event);
 79 }
 80 
 81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 82