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DetectorConstruction.cc
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33 
34 #include "DetectorConstruction.hh"
35 
36 #include "G4NistManager.hh"
37 #include "G4Box.hh"
38 #include "G4LogicalVolume.hh"
39 #include "G4PVPlacement.hh"
40 #include "G4SystemOfUnits.hh"
41 
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43 
45  : G4VUserDetectorConstruction(),fWorldSizeXY(0),fWorldSizeZ(0)
46 {
47  fWorldSizeXY = 2*cm;
48  fWorldSizeZ = 2*cm;
49 }
50 
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54 {}
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59 {
60  //
61  // define a material
62  //
63  G4Material* Air =
65 
66  //
67  // World
68  //
69  G4Box*
70  solidWorld = new G4Box("World", //its name
71  fWorldSizeXY/2,fWorldSizeXY/2,fWorldSizeZ/2); //its size
72 
74  logicWorld = new G4LogicalVolume(solidWorld, //its solid
75  Air, //its material
76  "World"); //its name
78  physiWorld = new G4PVPlacement(0, //no rotation
79  G4ThreeVector(), //at (0,0,0)
80  logicWorld, //its logical volume
81  "World", //its name
82  0, //its mother volume
83  false, //no boolean operation
84  0); //copy number
85 
86  //
87  //always return the physical World
88  //
89  return physiWorld;
90 }
91 
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