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B1PrimaryGeneratorAction.cc
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29 
30 #include "B1PrimaryGeneratorAction.hh"
31 
32 #include "G4LogicalVolumeStore.hh"
33 #include "G4LogicalVolume.hh"
34 #include "G4Box.hh"
35 #include "G4RunManager.hh"
36 #include "G4ParticleGun.hh"
37 #include "G4ParticleTable.hh"
38 #include "G4ParticleDefinition.hh"
39 #include "G4SystemOfUnits.hh"
40 #include "Randomize.hh"
41 
42 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
43 
46  fParticleGun(0),
47  fEnvelopeBox(0)
48 {
49  G4int n_particle = 1;
50  fParticleGun = new G4ParticleGun(n_particle);
51 
52  // default particle kinematic
54  G4String particleName;
56  = particleTable->FindParticle(particleName="gamma");
60 }
61 
62 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
63 
65 {
66  delete fParticleGun;
67 }
68 
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
70 
72 {
73  //this function is called at the begining of ecah event
74  //
75 
76  // In order to avoid dependence of PrimaryGeneratorAction
77  // on DetectorConstruction class we get Envelope volume
78  // from G4LogicalVolumeStore.
79 
80  G4double envSizeXY = 0;
81  G4double envSizeZ = 0;
82 
83  if (!fEnvelopeBox)
84  {
85  G4LogicalVolume* envLV
87  if ( envLV ) fEnvelopeBox = dynamic_cast<G4Box*>(envLV->GetSolid());
88  }
89 
90  if ( fEnvelopeBox ) {
91  envSizeXY = fEnvelopeBox->GetXHalfLength()*2.;
92  envSizeZ = fEnvelopeBox->GetZHalfLength()*2.;
93  }
94  else {
96  msg << "Envelope volume of box shape not found.\n";
97  msg << "Perhaps you have changed geometry.\n";
98  msg << "The gun will be place at the center.";
99  G4Exception("B1PrimaryGeneratorAction::GeneratePrimaries()",
100  "MyCode0002",JustWarning,msg);
101  }
102 
103  G4double size = 0.8;
104  G4double x0 = size * envSizeXY * (G4UniformRand()-0.5);
105  G4double y0 = size * envSizeXY * (G4UniformRand()-0.5);
106  G4double z0 = -0.5 * envSizeZ;
107 
109 
111 }
112 
113 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
114