| Geant4 Cross Reference |
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 //
26 //
27 /// \file VG01PrimaryGeneratorAction.cc
28 /// \brief Implementation of the VG01PrimaryGeneratorAction class
29 //
30 // Authors: J. Apostolakis & S. Wenzel (CERN) 2018-2021
31 //
32 // Started from FullCMS code by Mihaly Novak (CERN) 2017
33
34 #include "VG01PrimaryGeneratorAction.hh"
35
36 #include "G4Event.hh"
37 #include "G4ParticleDefinition.hh"
38 #include "G4ParticleGun.hh"
39 #include "G4ParticleTable.hh"
40 #include "G4RandomDirection.hh"
41 #include "G4SystemOfUnits.hh"
42
43 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
44
45 VG01PrimaryGeneratorAction::VG01PrimaryGeneratorAction(EGeneratorMode mode)
46 : G4VUserPrimaryGeneratorAction(), fParticleGun(0), fMode(mode)
47 {
48 G4int n_particle = 1;
49 fParticleGun = new G4ParticleGun(n_particle);
50
51 G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable();
52 G4String particleName;
53 fParticleGun->SetParticleDefinition(particleTable->FindParticle(particleName = "geantino"));
54 fParticleGun->SetParticleEnergy(1.0 * GeV);
55 fParticleGun->SetParticlePosition(G4ThreeVector(0, 0, 0)); // -1.2*m, 0.1, 0.1));
56 }
57
58 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
59
60 VG01PrimaryGeneratorAction::~VG01PrimaryGeneratorAction()
61 {
62 delete fParticleGun;
63 }
64
65 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
66
67 void VG01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
68 {
69 G4ThreeVector dir(1.0, 0.0, 0.0);
70
71 // G4ThreeVector FixedMode[3] =
72 // { G4ThreeVector(1,0,0), G4ThreeVector(1,0.1,0), G4ThreeVector( 1, 0, 0.1)};
73 G4ThreeVector AxisModeVectors[3] = {G4ThreeVector(1, 0, 0), G4ThreeVector(0, 1, 0),
74 G4ThreeVector(0, 0, 1.0)};
75
76 if (fMode == kFreeMode) {
77 // Do not fix the direction
78 // -- UI commands to particle mode can change it!
79 fParticleGun->GeneratePrimaryVertex(anEvent);
80 return;
81 //----
82 }
83 else if (fMode == kFixedMode) {
84 G4int i = anEvent->GetEventID() % 3;
85 dir = G4ThreeVector(1.0, 0.0, 0.0);
86 switch (i) {
87 case 0:
88 break;
89 case 1:
90 dir.setY(0.1);
91 break;
92 case 2:
93 dir.setZ(0.1);
94 break;
95 }
96 }
97 else if (fMode == kUniformMode) {
98 dir = G4RandomDirection();
99 }
100 else if (fMode == kAxisMode) {
101 G4int i = anEvent->GetEventID() % 3;
102 dir = AxisModeVectors[i];
103 }
104
105 fParticleGun->SetParticleMomentumDirection(dir);
106 fParticleGun->GeneratePrimaryVertex(anEvent);
107 }
108