| Geant4 Cross Reference |
1 // 1
2 // *******************************************
3 // * License and Disclaimer
4 // *
5 // * The Geant4 software is copyright of th
6 // * the Geant4 Collaboration. It is provided
7 // * conditions of the Geant4 Software License
8 // * LICENSE and available at http://cern.ch/
9 // * include a list of copyright holders.
10 // *
11 // * Neither the authors of this software syst
12 // * institutes,nor the agencies providing fin
13 // * work make any representation or warran
14 // * regarding this software system or assum
15 // * use. Please see the license in the file
16 // * for the full disclaimer and the limitatio
17 // *
18 // * This code implementation is the result
19 // * technical work of the GEANT4 collaboratio
20 // * By using, copying, modifying or distri
21 // * any work based on the software) you ag
22 // * use in resulting scientific publicati
23 // * acceptance of all terms of the Geant4 Sof
24 // *******************************************
25 //
26 // This example is provided by the Geant4-DNA
27 // Any report or published results obtained us
28 // shall cite the following Geant4-DNA collabo
29 // Med. Phys. 37 (2010) 4692-4708
30 // Delage et al. PDB4DNA: implementation of DN
31 // Bank (PDB) description for
32 // simulations (submitted to
33 // The Geant4-DNA web site is available at htt
34 //
35 //
36 /// \file PrimaryGeneratorAction.cc
37 /// \brief Implementation of the PrimaryGenera
38
39 #include "PrimaryGeneratorAction.hh"
40
41 #include "G4Box.hh"
42 #include "G4Event.hh"
43 #include "G4LogicalVolume.hh"
44 #include "G4LogicalVolumeStore.hh"
45 #include "G4ParticleDefinition.hh"
46 #include "G4ParticleGun.hh"
47 #include "G4ParticleTable.hh"
48 #include "G4PhysicalConstants.hh"
49 #include "G4PhysicalVolumeStore.hh"
50 #include "G4SystemOfUnits.hh"
51 #include "Randomize.hh"
52
53 //....oooOO0OOooo........oooOO0OOooo........oo
54
55 PrimaryGeneratorAction::PrimaryGeneratorAction
56 {
57 G4int n_particle = 1;
58 fpParticleGun = new G4ParticleGun(n_particle
59
60 // default particle kinematic
61
62 G4ParticleDefinition* particle = G4ParticleT
63 fpParticleGun->SetParticleDefinition(particl
64 fpParticleGun->SetParticleMomentumDirection(
65 fpParticleGun->SetParticleEnergy(0.1 * MeV);
66 fpParticleGun->SetParticlePosition(G4ThreeVe
67 }
68
69 //....oooOO0OOooo........oooOO0OOooo........oo
70
71 PrimaryGeneratorAction::~PrimaryGeneratorActio
72 {
73 delete fpParticleGun;
74 }
75
76 //....oooOO0OOooo........oooOO0OOooo........oo
77
78 void PrimaryGeneratorAction::GeneratePrimaries
79 {
80 // In order to avoid dependence of PrimaryGe
81 // on DetectorConstruction class we get worl
82 // from G4LogicalVolumeStore
83 //
84 G4double boundXHalfLength = 0;
85 G4double boundYHalfLength = 0;
86 G4double boundZHalfLength = 0;
87
88 G4VPhysicalVolume* boundPV = G4PhysicalVolum
89
90 G4ThreeVector boundPos;
91 if (boundPV) {
92 boundPos = boundPV->GetTranslation();
93 }
94
95 G4LogicalVolume* boundLV = G4LogicalVolumeSt
96
97 G4Box* boundBox = 0;
98 if (boundLV) {
99 boundBox = dynamic_cast<G4Box*>(boundLV->G
100 }
101
102 if (boundBox) {
103 boundXHalfLength = boundBox->GetXHalfLengt
104 boundYHalfLength = boundBox->GetYHalfLengt
105 boundZHalfLength = boundBox->GetZHalfLengt
106
107 // Set gun position
108 // Select a starting position on a sphere
109 //
110 G4double radius =
111 std::sqrt(boundXHalfLength * boundXHalfL
112 + boundZHalfLength * boundZHal
113 G4double cosTheta = 2 * G4UniformRand() -
114 G4double sinTheta = std::sqrt(1. - cosThet
115 G4double phi = twopi * G4UniformRand();
116
117 G4ThreeVector positionStart(boundPos.x() +
118 boundPos.y() +
119 boundPos.z() +
120
121 fpParticleGun->SetParticlePosition(positio
122
123 // Set gun direction
124 // To compute the direction, select a poin
125 //
126 G4ThreeVector positionDir(boundPos.x() + b
127 boundPos.y() + b
128 boundPos.z() + b
129
130 fpParticleGun->SetParticleMomentumDirectio
131 }
132 else {
133 G4cerr << "Bounding volume not found." <<
134 G4cerr << "Default particle kinematic used
135 }
136
137 fpParticleGun->GeneratePrimaryVertex(anEvent
138 }
139