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basic/B2/B2a/src/B2PrimaryGeneratorAction.cc
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26 // $Id: B2PrimaryGeneratorAction.cc 97979 2016-06-30 09:36:20Z gcosmo $
27 //
30 
31 #include "B2PrimaryGeneratorAction.hh"
32 
33 #include "G4LogicalVolumeStore.hh"
34 #include "G4LogicalVolume.hh"
35 #include "G4Box.hh"
36 #include "G4Event.hh"
37 #include "G4ParticleGun.hh"
38 #include "G4ParticleTable.hh"
39 #include "G4ParticleDefinition.hh"
40 #include "G4SystemOfUnits.hh"
41 
42 #include "Randomize.hh"
43 
44 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
45 
48 {
49  G4int nofParticles = 1;
50  fParticleGun = new G4ParticleGun(nofParticles);
51 
52  // default particle kinematic
53 
54  G4ParticleDefinition* particleDefinition
56 
57  fParticleGun->SetParticleDefinition(particleDefinition);
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 event
74 
75  // In order to avoid dependence of PrimaryGeneratorAction
76  // on DetectorConstruction class we get world volume
77  // from G4LogicalVolumeStore.
78 
79  G4double worldZHalfLength = 0;
80  G4LogicalVolume* worldLV
82  G4Box* worldBox = NULL;
83  if ( worldLV ) worldBox = dynamic_cast<G4Box*>(worldLV->GetSolid());
84  if ( worldBox ) worldZHalfLength = worldBox->GetZHalfLength();
85  else {
86  G4cerr << "World volume of box not found." << G4endl;
87  G4cerr << "Perhaps you have changed geometry." << G4endl;
88  G4cerr << "The gun will be place in the center." << G4endl;
89  }
90 
91  fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., -worldZHalfLength));
92 
94 }
95 
96 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
CLHEP::Hep3Vector G4ThreeVector
static G4ParticleTable * GetParticleTable()
#define G4endl
Definition: G4ios.hh:61
void SetParticlePosition(G4ThreeVector aPosition)
double G4double
Definition: G4Types.hh:76
void SetParticleDefinition(G4ParticleDefinition *aParticleDefinition)
Definition: G4Box.hh:64
G4GLOB_DLL std::ostream G4cerr
int G4int
Definition: G4Types.hh:78
virtual void GeneratePrimaryVertex(G4Event *evt)
G4VSolid * GetSolid() const
void SetParticleEnergy(G4double aKineticEnergy)
static constexpr double GeV
Definition: G4SIunits.hh:217
G4double GetZHalfLength() const
void SetParticleMomentumDirection(G4ParticleMomentum aMomentumDirection)
static G4LogicalVolumeStore * GetInstance()
G4LogicalVolume * GetVolume(const G4String &name, G4bool verbose=true) const