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DetectorConstruction.cc
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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 // Phys. Med. 31 (2015) 861-874
30 // Med. Phys. 37 (2010) 4692-4708
31 // The Geant4-DNA web site is available at http://geant4-dna.org
32 //
33 //
36 
37 #include "DetectorConstruction.hh"
38 #include "DetectorMessenger.hh"
39 
40 #include "G4SystemOfUnits.hh"
41 #include "G4UserLimits.hh"
42 #include "G4NistManager.hh"
43 #include "G4UnitsTable.hh"
44 #include "G4LogicalVolumeStore.hh"
45 #include "G4RunManager.hh"
46 
47 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
48 
49 DetectorConstruction::DetectorConstruction() :
50  G4VUserDetectorConstruction(), fWaterMaterial(0)
51 {
52  // create commands for interactive definition of the detector
53  fDetectorMessenger = new DetectorMessenger(this);
54 
55  //default tracking cut
56  fTrackingCut = 7.4*eV;
57 }
58 
59 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
60 
61 DetectorConstruction::~DetectorConstruction()
62 {
63  delete fDetectorMessenger;
64 }
65 
66 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
67 
68 G4VPhysicalVolume* DetectorConstruction::Construct()
69 
70 {
71  DefineMaterials();
72  return ConstructDetector();
73 }
74 
75 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
76 
77 void DetectorConstruction::DefineMaterials()
78 {
79 
80  // Water is defined from NIST material database
81  G4NistManager * man = G4NistManager::Instance();
82 
83  G4Material * H2O = man->FindOrBuildMaterial("G4_WATER");
84 
85  fWaterMaterial = H2O;
86 
87  G4cout << *(G4Material::GetMaterialTable()) << G4endl;
88 }
89 
90 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
91 
92 G4VPhysicalVolume* DetectorConstruction::ConstructDetector()
93 {
94 
95  // WORLD VOLUME
96 
97  G4double worldSizeX = 1 * m;
98  G4double worldSizeY = worldSizeX;
99  G4double worldSizeZ = worldSizeX;
100 
101  G4Box* solidWorld = new G4Box("World", //its name
102  worldSizeX / 2, worldSizeY / 2, worldSizeZ / 2); //its size
103 
104  fLogicWorld = new G4LogicalVolume(solidWorld, //its solid
105  fWaterMaterial, //its material
106  "World"); //its name
107 
108  G4PVPlacement* physiWorld = new G4PVPlacement(
109  0, //no rotation
110  G4ThreeVector(), //at (0,0,0)
111  fLogicWorld,
112  "World", //its name
113  0, //its mother volume
114  false, //no boolean operation
115  0); //copy number
116 
117  // Visualization attributes
118  G4VisAttributes* worldVisAtt = new G4VisAttributes(G4Colour(1.0, 1.0, 1.0));
119  worldVisAtt->SetVisibility(true);
120  fLogicWorld->SetVisAttributes(worldVisAtt);
121 
122  G4VisAttributes* worldVisAtt1 = new G4VisAttributes(G4Colour(1.0, 0.0, 0.0));
123  worldVisAtt1->SetVisibility(true);
124 
125  // Tracking cut
126  fLogicWorld->SetUserLimits(new G4UserLimits(DBL_MAX,DBL_MAX,DBL_MAX,
127  fTrackingCut));
128 
129  PrintParameters();
130 
131  return physiWorld;
132 }
133 
134 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
135 
136 void DetectorConstruction::SetMaterial(G4String materialChoice)
137 {
138  // search the material by its name
139  G4Material* pttoMaterial = G4Material::GetMaterial(materialChoice);
140  if (pttoMaterial) fWaterMaterial = pttoMaterial;
141  G4RunManager::GetRunManager()->PhysicsHasBeenModified();
142 }
143 
144 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
145 
146 void DetectorConstruction::SetTrackingCut(G4double value)
147 {
148  fTrackingCut = value;
149  G4RunManager::GetRunManager()->ReinitializeGeometry();
150 }
151 
152 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
153 
154 void DetectorConstruction::PrintParameters() const
155 {
156  G4cout << "\n---------------------------------------------------------\n";
157  G4cout << "---> The tracking cut is set to "
158  << G4BestUnit(fTrackingCut,"Energy") << G4endl;
159  G4cout << "\n---------------------------------------------------------\n";
160 }
161 
162 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......