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25 //
26 //
27 /// \file persistency/P03/src/ExTGDetectorConstructionWithCpp.cc
28 /// \brief Implementation of the ExTGDetectorConstructionWithCpp class
29
30 #include "ExTGDetectorConstructionWithCpp.hh"
31
32 #include "G4Box.hh"
33 #include "G4LogicalVolume.hh"
34 #include "G4NistManager.hh"
35 #include "G4PVPlacement.hh"
36 #include "G4tgbVolumeMgr.hh"
37 #include "G4tgrMessenger.hh"
38
39 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
40 ExTGDetectorConstructionWithCpp::ExTGDetectorConstructionWithCpp()
41 {
42 fMessenger = new G4tgrMessenger;
43 }
44
45 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
46 ExTGDetectorConstructionWithCpp::~ExTGDetectorConstructionWithCpp()
47 {
48 delete fMessenger;
49 }
50
51 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
52 G4VPhysicalVolume* ExTGDetectorConstructionWithCpp::Construct()
53 {
54 //------------------------------------------------
55 // Define one or several text files containing the geometry description
56 //------------------------------------------------
57 G4String filename = "g4geom_simple.txt";
58 G4tgbVolumeMgr* volmgr = G4tgbVolumeMgr::GetInstance();
59 volmgr->AddTextFile(filename);
60
61 //------------------------------------------------
62 // Read the text files and construct the GEANT4 geometry
63 //------------------------------------------------
64 G4VPhysicalVolume* physiWorld = volmgr->ReadAndConstructDetector();
65
66 //------------------------------------------------
67 // Build another volume and place it in the text geometry
68 //------------------------------------------------
69 G4Box* solid = new G4Box("mybox", 2., 2., 3.);
70
71 G4Material* water = G4NistManager::Instance()->FindOrBuildMaterial("G4_Fe");
72
73 G4LogicalVolume* logicVol = new G4LogicalVolume(solid, water, "mybox", 0, 0, 0);
74
75 //----- Place the volume in the world of the text geometry
76 G4LogicalVolume* textWorldVol = physiWorld->GetLogicalVolume();
77
78 // NOTE: if you want to place your full text geometry in the C++ geometry,
79 // you should use this G4LogicalVolume and place it in a C++ logical
80 // volume
81 new G4PVPlacement(0, // no rotation
82 G4ThreeVector(0., -20., 0), // at (x,y,z)
83 logicVol, // its logical volume
84 "myBox1", // its name
85 textWorldVol, // its mother volume
86 false, // no boolean operations
87 0); // copy number
88
89 //----- Place the volume inside a volume of the text geometry
90 G4LogicalVolume* textSphereVol = G4tgbVolumeMgr::GetInstance()->FindG4LogVol("sphere", 1);
91 new G4PVPlacement(0, // no rotation
92 G4ThreeVector(0., 0., 0), // at (x,y,z)
93 logicVol, // its logical volume
94 "myBox2", // its name
95 textSphereVol, // its mother volume
96 false, // no boolean operations
97 1); // copy number
98
99 return physiWorld;
100 }
101