Geant4  10.03.p02
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Macros Groups Pages
PrimaryGeneratorGun1.cc
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
28 //
29 //
30 // $Id: PrimaryGeneratorGun1.cc 68734 2013-04-05 09:47:02Z gcosmo $
31 //
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
34 
35 #include "PrimaryGeneratorGun1.hh"
36 
37 #include "G4Event.hh"
38 #include "G4ParticleGun.hh"
39 #include "G4ParticleTable.hh"
40 #include "G4ParticleDefinition.hh"
41 #include "G4SystemOfUnits.hh"
42 #include "G4PhysicalConstants.hh"
43 #include "Randomize.hh"
44 
45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
46 
48  : G4VUserPrimaryGeneratorAction(), fParticleGun(0)
49 {
50  // default particle kinematic
51  //
52  G4int n_particle = 1;
53  fParticleGun = new G4ParticleGun(n_particle);
54 
55  G4ParticleDefinition* particle
57  fParticleGun->SetParticleDefinition(particle);
58  fParticleGun->SetParticleEnergy(1*eV);
59  fParticleGun->SetParticlePosition(G4ThreeVector(0., 0., 0.));
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  //distribution uniform in solid angle
76  //
77  G4double cosTheta = 2*G4UniformRand() - 1., phi = twopi*G4UniformRand();
78  G4double sinTheta = std::sqrt(1. - cosTheta*cosTheta);
79  G4double ux = sinTheta*std::cos(phi),
80  uy = sinTheta*std::sin(phi),
81  uz = cosTheta;
82 
83  fParticleGun->SetParticleMomentumDirection(G4ThreeVector(ux,uy,uz));
84  fParticleGun->GeneratePrimaryVertex(anEvent);
85 }
86 
87 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
G4ParticleDefinition * FindParticle(G4int PDGEncoding)
CLHEP::Hep3Vector G4ThreeVector
virtual void GeneratePrimaries(G4Event *)
void SetParticleMomentumDirection(G4ParticleMomentum aMomentumDirection)
int G4int
Definition: G4Types.hh:78
virtual void GeneratePrimaryVertex(G4Event *evt)
static constexpr double twopi
Definition: G4SIunits.hh:76
void SetParticlePosition(G4ThreeVector aPosition)
#define G4UniformRand()
Definition: Randomize.hh:97
static constexpr double eV
Definition: G4SIunits.hh:215
void SetParticleEnergy(G4double aKineticEnergy)
static G4ParticleTable * GetParticleTable()
double G4double
Definition: G4Types.hh:76
void SetParticleDefinition(G4ParticleDefinition *aParticleDefinition)