P03/src/ExTGDetectorConstructionWithCpp.cc

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0025 //
0026 /// \file ExTGDetectorConstructionWithCpp.cc
0027 /// \brief Implementation of the ExTGDetectorConstructionWithCpp class
0028
0029 #include "ExTGDetectorConstructionWithCpp.hh"
0030
0031 #include "G4Box.hh"
0032 #include "G4LogicalVolume.hh"
0033 #include "G4NistManager.hh"
0034 #include "G4PVPlacement.hh"
0035 #include "G4tgbVolumeMgr.hh"
0036 #include "G4tgrMessenger.hh"
0037
0038 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0039 ExTGDetectorConstructionWithCpp::ExTGDetectorConstructionWithCpp()
0040 {
0041   fMessenger = new G4tgrMessenger;
0042 }
0043
0044 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0045 ExTGDetectorConstructionWithCpp::~ExTGDetectorConstructionWithCpp()
0046 {
0047   delete fMessenger;
0048 }
0049
0050 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0051 G4VPhysicalVolume* ExTGDetectorConstructionWithCpp::Construct()
0052 {
0053   //------------------------------------------------
0054   // Define one or several text files containing the geometry description
0055   //------------------------------------------------
0056   G4String filename = "g4geom_simple.txt";
0057   G4tgbVolumeMgr* volmgr = G4tgbVolumeMgr::GetInstance();
0058   volmgr->AddTextFile(filename);
0059
0060   //------------------------------------------------
0061   // Read the text files and construct the GEANT4 geometry
0062   //------------------------------------------------
0063   G4VPhysicalVolume* physiWorld = volmgr->ReadAndConstructDetector();
0064
0065   //------------------------------------------------
0066   // Build another volume and place it in the text geometry
0067   //------------------------------------------------
0068   G4Box* solid = new G4Box("mybox", 2., 2., 3.);
0069
0070   G4Material* water = G4NistManager::Instance()->FindOrBuildMaterial("G4_Fe");
0071
0072   G4LogicalVolume* logicVol = new G4LogicalVolume(solid, water, "mybox", 0, 0, 0);
0073
0074   //----- Place the volume in the world of the text geometry
0075   G4LogicalVolume* textWorldVol = physiWorld->GetLogicalVolume();
0076
0077   // NOTE: if you want to place your full text geometry in the C++ geometry,
0078   //       you should use this G4LogicalVolume and place it in a C++ logical
0079   //       volume
0080   new G4PVPlacement(0,  // no rotation
0081                     G4ThreeVector(0., -20., 0),  // at (x,y,z)
0082                     logicVol,  // its logical volume
0083                     "myBox1",  // its name
0084                     textWorldVol,  // its mother  volume
0085                     false,  // no boolean operations
0086                     0);  // copy number
0087
0088   //----- Place the volume inside a volume of the text geometry
0089   G4LogicalVolume* textSphereVol = G4tgbVolumeMgr::GetInstance()->FindG4LogVol("sphere", 1);
0090   new G4PVPlacement(0,  // no rotation
0091                     G4ThreeVector(0., 0., 0),  // at (x,y,z)
0092                     logicVol,  // its logical volume
0093                     "myBox2",  // its name
0094                     textSphereVol,  // its mother  volume
0095                     false,  // no boolean operations
0096                     1);  // copy number
0097
0098   return physiWorld;
0099 }