Geant4  9.6.p02
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ExN01PrimaryGeneratorAction.cc
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27 // $Id$
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29 
31 
32 #include "G4Event.hh"
33 #include "G4ParticleGun.hh"
34 #include "G4ParticleTable.hh"
35 #include "G4ParticleDefinition.hh"
36 #include "globals.hh"
37 #include "G4SystemOfUnits.hh"
38 
40 {
41  G4int n_particle = 1;
42  particleGun = new G4ParticleGun(n_particle);
43 
45  G4String particleName;
46  particleGun->SetParticleDefinition(particleTable->FindParticle(particleName="geantino"));
47  particleGun->SetParticleEnergy(1.0*GeV);
48  particleGun->SetParticlePosition(G4ThreeVector(-2.0*m, 0.0, 0.0));
49 }
50 
52 {
53  delete particleGun;
54 }
55 
57 {
58  G4int i = anEvent->GetEventID() % 3;
59  G4ThreeVector v(1.0,0.0,0.0);
60  switch(i)
61  {
62  case 0:
63  break;
64  case 1:
65  v.setY(0.1);
66  break;
67  case 2:
68  v.setZ(0.1);
69  break;
70  }
71  particleGun->SetParticleMomentumDirection(v);
72  particleGun->GeneratePrimaryVertex(anEvent);
73 }
74 
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