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 | // $Id: Sc01PrimaryGeneratorAction.cc,v 1.4 2006/12/13 15:43:44 gunter Exp $ |
---|
27 | // ------------------------------------------------------------ |
---|
28 | // GEANT 4 class header file |
---|
29 | // |
---|
30 | // This is a version for maximum particle set |
---|
31 | // History |
---|
32 | // first version 09 Sept. 1998 by S.Magni |
---|
33 | // ------------------------------------------------------------ |
---|
34 | |
---|
35 | #include "Sc01PrimaryGeneratorAction.hh" |
---|
36 | #include "Sc01DetectorConstruction.hh" |
---|
37 | |
---|
38 | #include "G4Event.hh" |
---|
39 | #include "G4ParticleGun.hh" |
---|
40 | #include "G4ParticleTable.hh" |
---|
41 | #include "G4ParticleDefinition.hh" |
---|
42 | #include "Randomize.hh" |
---|
43 | #include "globals.hh" |
---|
44 | |
---|
45 | #include <iostream> |
---|
46 | #include <fstream> |
---|
47 | |
---|
48 | Sc01PrimaryGeneratorAction:: |
---|
49 | Sc01PrimaryGeneratorAction(Sc01DetectorConstruction*det) |
---|
50 | : |
---|
51 | fDetector(det) |
---|
52 | { |
---|
53 | particleGun = new G4ParticleGun(); |
---|
54 | } |
---|
55 | |
---|
56 | Sc01PrimaryGeneratorAction::~Sc01PrimaryGeneratorAction() |
---|
57 | { |
---|
58 | delete particleGun; |
---|
59 | } |
---|
60 | |
---|
61 | void Sc01PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
---|
62 | { |
---|
63 | |
---|
64 | G4ParticleTable* particleTable = G4ParticleTable::GetParticleTable(); |
---|
65 | G4String particleName; |
---|
66 | G4ParticleDefinition* aParticleDefinition |
---|
67 | = particleTable->FindParticle(particleName="opticalphoton"); |
---|
68 | |
---|
69 | // create a new vertex in a random position |
---|
70 | |
---|
71 | // G4ThreeVector VertexPosition (GetRandomPosition()); |
---|
72 | G4ThreeVector VertexPosition (G4ThreeVector(0,0,0)); |
---|
73 | G4PrimaryVertex* aVertex = |
---|
74 | new G4PrimaryVertex( VertexPosition, 0); |
---|
75 | |
---|
76 | // G4int NumberOfParticlesToBeGenerated = 10000; |
---|
77 | G4int NumberOfParticlesToBeGenerated = 1; |
---|
78 | // G4cout << " A " << NumberOfParticlesToBeGenerated |
---|
79 | // << " optical photons vertex has been generated at " |
---|
80 | // << VertexPosition << G4endl; |
---|
81 | // create new primaries and set them to the vertex |
---|
82 | for( int i=0; i<NumberOfParticlesToBeGenerated; i++ ) |
---|
83 | { |
---|
84 | // G4ThreeVector m = GetRandomDirection(); |
---|
85 | G4ThreeVector m(0.,1.,0.); |
---|
86 | G4PrimaryParticle* aPrimaryParticle = |
---|
87 | new G4PrimaryParticle(aParticleDefinition, m.x(), m.y(), m.z()); |
---|
88 | aPrimaryParticle->SetMass (0); |
---|
89 | G4ThreeVector p = GetRandomPolarization ( m ); |
---|
90 | aPrimaryParticle->SetPolarization(p.x(),p.y(),p.z()); |
---|
91 | aVertex->SetPrimary( aPrimaryParticle ); |
---|
92 | } |
---|
93 | anEvent->AddPrimaryVertex( aVertex ); |
---|
94 | } |
---|
95 | |
---|
96 | G4ThreeVector Sc01PrimaryGeneratorAction::GetRandomDirection() { |
---|
97 | |
---|
98 | G4ThreeVector retval; |
---|
99 | |
---|
100 | G4double CosTheta; |
---|
101 | G4double SinTheta; |
---|
102 | |
---|
103 | G4double Phi; |
---|
104 | G4double SinPhi; |
---|
105 | G4double CosPhi; |
---|
106 | |
---|
107 | G4double rand; |
---|
108 | |
---|
109 | rand = G4UniformRand(); |
---|
110 | |
---|
111 | CosTheta = 2.0*rand -1.0; |
---|
112 | SinTheta = std::sqrt (1.-CosTheta*CosTheta); |
---|
113 | rand = G4UniformRand(); |
---|
114 | Phi = twopi*rand; |
---|
115 | SinPhi = std::sin (Phi); |
---|
116 | CosPhi = std::cos (Phi); |
---|
117 | retval.setX(SinTheta*CosPhi); |
---|
118 | retval.setY(SinTheta*SinPhi); |
---|
119 | retval.setZ(CosTheta); |
---|
120 | |
---|
121 | return retval; |
---|
122 | } |
---|
123 | |
---|
124 | G4ThreeVector Sc01PrimaryGeneratorAction::GetRandomPosition() |
---|
125 | { |
---|
126 | G4double a = fDetector->GetHallSize(); |
---|
127 | |
---|
128 | G4double x = ( G4UniformRand()*2 - 1 )*a; |
---|
129 | G4double y = ( G4UniformRand()*2 - 1 )*a; |
---|
130 | G4double z = ( G4UniformRand()*2 - 1 )*a; |
---|
131 | |
---|
132 | G4ThreeVector retval (x, y, z); |
---|
133 | |
---|
134 | return retval; |
---|
135 | } |
---|
136 | |
---|
137 | G4ThreeVector Sc01PrimaryGeneratorAction::GetRandomPolarization(G4ThreeVector Direction) { |
---|
138 | G4ThreeVector Polarization = Direction.orthogonal(); |
---|
139 | G4ThreeVector retval = Polarization.unit(); |
---|
140 | return retval; |
---|
141 | } |
---|
142 | |
---|
143 | |
---|
144 | |
---|
145 | |
---|
146 | |
---|
147 | |
---|