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25 //
26 // This example is provided by the Geant4-DNA collaboration
27 // Any report or published results obtained using the Geant4-DNA software
28 // shall cite the following Geant4-DNA collaboration publications:
29 // Med. Phys. 45 (2018) e722-e739
30 // Phys. Med. 31 (2015) 861-874
31 // Med. Phys. 37 (2010) 4692-4708
32 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
33 //
34 // The Geant4-DNA web site is available at http://geant4-dna.org
35 //
36 /// \file DetectorConstruction.cc
37 /// \brief Implementation of the DetectorConstruction class
38
39 #include "DetectorConstruction.hh"
40 #include "DetectorMessenger.hh"
41 #include "PhysicsList.hh"
42
43 #include "G4LogicalVolumeStore.hh"
44 #include "G4NistManager.hh"
45 #include "G4RunManager.hh"
46 #include "G4SystemOfUnits.hh"
47 #include "G4UserLimits.hh"
48
49 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
50
51 DetectorConstruction::DetectorConstruction(PhysicsList* ptr)
52 : G4VUserDetectorConstruction(),
53 fpWaterMaterial(nullptr),
54 fLogicWorld(nullptr),
55 fPhysiWorld(nullptr)
56 {
57 // Create commands for interactive definition of the detector
58 fDetectorMessenger = new DetectorMessenger(this, ptr);
59
60 // Default values
61 //
62 // World size
63 fWorldSize = 100 *um;
64 // and material
65 G4NistManager* man = G4NistManager::Instance();
66 G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
67 fpWaterMaterial = H2O;
68 }
69
70 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
71
72 DetectorConstruction::~DetectorConstruction()
73 {
74 delete fDetectorMessenger;
75 }
76
77 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
78
79 void DetectorConstruction::DefineMaterials()
80 {
81 // Water is defined from NIST material database
82 G4NistManager* man = G4NistManager::Instance();
83
84 G4Material* H2O = man->FindOrBuildMaterial("G4_WATER");
85
86 /*
87 If one wishes to test other density value for water material,
88 one should use instead:
89 G4Material * H2O = man->BuildMaterialWithNewDensity("G4_WATER_MODIFIED",
90 "G4_WATER",1.100*g/cm3);
91
92 Note: any string for "G4_WATER_MODIFIED" parameter is accepted
93 and "G4_WATER" parameter should not be changed
94 Both materials are created and can be selected from dna.mac
95 */
96 fpWaterMaterial = H2O;
97
98 // G4cout << "-> Density of water material (g/cm3)="
99 // << fpWaterMaterial->GetDensity()/(g/cm/cm/cm) << G4endl;
100
101 G4cout << *(G4Material::GetMaterialTable()) << G4endl;
102 }
103
104 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
105
106 G4Material*
107 DetectorConstruction::MaterialWithDensity(G4String name, G4double density)
108 {
109 // Water is defined from NIST material database
110 G4NistManager* man = G4NistManager::Instance();
111
112 G4Material * material = man->BuildMaterialWithNewDensity(name,
113 "G4_WATER", density);
114
115 G4cout << "-> Density of water_modified material (g/cm3)="
116 << material->GetDensity()/(g/cm/cm/cm) << G4endl;
117
118 return material;
119 }
120
121 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
122
123 G4VPhysicalVolume* DetectorConstruction::Construct()
124 {
125 if (fPhysiWorld) {
126 return fPhysiWorld;
127 }
128
129 // World volume
130 G4double worldSizeX = fWorldSize;
131 G4double worldSizeY = worldSizeX;
132 G4double worldSizeZ = worldSizeX;
133
134 G4Box* solidWorld = new G4Box("World", // its name
135 worldSizeX / 2, worldSizeY / 2, worldSizeZ / 2);
136 // its size
137
138 fLogicWorld = new G4LogicalVolume(solidWorld, // its solid
139 fpWaterMaterial, // its material
140 "World"); // its name
141
142 fPhysiWorld = new G4PVPlacement(0, // no rotation
143 G4ThreeVector(), // at (0,0,0)
144 "World", // its name
145 fLogicWorld, // its logical volume
146 0, // its mother volume
147 false, // no boolean operation
148 0); // copy number
149
150 // Visualization attributes - white
151 G4VisAttributes* worldVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
152 worldVisAtt->SetVisibility(true);
153 fLogicWorld->SetVisAttributes(worldVisAtt);
154
155 G4VisAttributes* worldVisAtt1 = new G4VisAttributes(G4Colour(1.0, 0.0, 0.0));
156 worldVisAtt1->SetVisibility(true);
157
158 // Shows how to introduce a 20 eV tracking cut
159 // logicWorld->SetUserLimits(new G4UserLimits(DBL_MAX,DBL_MAX,DBL_MAX,20*eV));
160
161 return fPhysiWorld;
162 }
163
164 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
165
166 void DetectorConstruction::SetMaterial(const G4String& materialChoice)
167 {
168 // Search the material by its name
169 G4Material* pttoMaterial =
170 G4NistManager::Instance()->FindOrBuildMaterial(materialChoice);
171
172 if (pttoMaterial) {
173 fpWaterMaterial = pttoMaterial;
174 if (fLogicWorld) {
175 fLogicWorld->SetMaterial(fpWaterMaterial);
176 }
177 G4RunManager::GetRunManager()->GeometryHasBeenModified();
178 }
179 }
180
181 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
182
183 void DetectorConstruction::SetSize(G4double value)
184 {
185 fWorldSize = value;
186 G4RunManager::GetRunManager()->ReinitializeGeometry();
187 }
188