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25 //
26 /// \file electromagnetic/TestEm5/src/PrimaryG
27 /// \brief Implementation of the PrimaryGenera
28 //
29 //
30 //....oooOO0OOooo........oooOO0OOooo........oo
31 //....oooOO0OOooo........oooOO0OOooo........oo
32
33 #include "PrimaryGeneratorAction.hh"
34
35 #include "DetectorConstruction.hh"
36 #include "PrimaryGeneratorMessenger.hh"
37
38 #include "G4Event.hh"
39 #include "G4ParticleDefinition.hh"
40 #include "G4ParticleTable.hh"
41 #include "G4SystemOfUnits.hh"
42 #include "Randomize.hh"
43
44 //....oooOO0OOooo........oooOO0OOooo........oo
45
46 PrimaryGeneratorAction::PrimaryGeneratorAction
47 {
48 G4int n_particle = 1;
49 fParticleGun = new G4ParticleGun(n_particle)
50 SetDefaultKinematic();
51
52 // create a messenger for this class
53 fGunMessenger = new PrimaryGeneratorMessenge
54 }
55
56 //....oooOO0OOooo........oooOO0OOooo........oo
57
58 PrimaryGeneratorAction::~PrimaryGeneratorActio
59 {
60 delete fParticleGun;
61 delete fGunMessenger;
62 }
63
64 //....oooOO0OOooo........oooOO0OOooo........oo
65
66 void PrimaryGeneratorAction::SetDefaultKinemat
67 {
68 // default particle kinematic
69 //
70 G4ParticleTable* particleTable = G4ParticleT
71 G4ParticleDefinition* particle = particleTab
72 fParticleGun->SetParticleDefinition(particle
73 fParticleGun->SetParticleMomentumDirection(G
74 fParticleGun->SetParticleEnergy(30. * MeV);
75 G4double x0 = -0.4999 * (fDetector->GetWorld
76 fParticleGun->SetParticlePosition(G4ThreeVec
77 }
78
79 //....oooOO0OOooo........oooOO0OOooo........oo
80
81 void PrimaryGeneratorAction::GeneratePrimaries
82 {
83 // this function is called at the begining o
84 //
85 // randomize the beam, if requested.
86 if (fRndmBeam > 0.) {
87 G4ThreeVector oldPosition = fParticleGun->
88 G4double rbeam = 0.5 * (fDetector->GetAbso
89 G4double x0 = oldPosition.x();
90 G4double y0 = (2 * G4UniformRand() - 1.) *
91 G4double z0 = (2 * G4UniformRand() - 1.) *
92 fParticleGun->SetParticlePosition(G4ThreeV
93 fParticleGun->GeneratePrimaryVertex(anEven
94 fParticleGun->SetParticlePosition(oldPosit
95 }
96 else
97 fParticleGun->GeneratePrimaryVertex(anEven
98 }
99
100 //....oooOO0OOooo........oooOO0OOooo........oo
101