P03/src/ExTGDetectorConstructionWithCpp.cc

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0027 /// \file persistency/P03/src/ExTGDetectorConstructionWithCpp.cc
0028 /// \brief Implementation of the ExTGDetectorConstructionWithCpp class
0029
0030 #include "ExTGDetectorConstructionWithCpp.hh"
0031
0032 #include "G4Box.hh"
0033 #include "G4LogicalVolume.hh"
0034 #include "G4NistManager.hh"
0035 #include "G4PVPlacement.hh"
0036 #include "G4tgbVolumeMgr.hh"
0037 #include "G4tgrMessenger.hh"
0038
0039 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0040 ExTGDetectorConstructionWithCpp::ExTGDetectorConstructionWithCpp()
0041 {
0042   fMessenger = new G4tgrMessenger;
0043 }
0044
0045 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0046 ExTGDetectorConstructionWithCpp::~ExTGDetectorConstructionWithCpp()
0047 {
0048   delete fMessenger;
0049 }
0050
0051 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0052 G4VPhysicalVolume* ExTGDetectorConstructionWithCpp::Construct()
0053 {
0054   //------------------------------------------------
0055   // Define one or several text files containing the geometry description
0056   //------------------------------------------------
0057   G4String filename = "g4geom_simple.txt";
0058   G4tgbVolumeMgr* volmgr = G4tgbVolumeMgr::GetInstance();
0059   volmgr->AddTextFile(filename);
0060
0061   //------------------------------------------------
0062   // Read the text files and construct the GEANT4 geometry
0063   //------------------------------------------------
0064   G4VPhysicalVolume* physiWorld = volmgr->ReadAndConstructDetector();
0065
0066   //------------------------------------------------
0067   // Build another volume and place it in the text geometry
0068   //------------------------------------------------
0069   G4Box* solid = new G4Box("mybox", 2., 2., 3.);
0070
0071   G4Material* water = G4NistManager::Instance()->FindOrBuildMaterial("G4_Fe");
0072
0073   G4LogicalVolume* logicVol = new G4LogicalVolume(solid, water, "mybox", 0, 0, 0);
0074
0075   //----- Place the volume in the world of the text geometry
0076   G4LogicalVolume* textWorldVol = physiWorld->GetLogicalVolume();
0077
0078   // NOTE: if you want to place your full text geometry in the C++ geometry,
0079   //       you should use this G4LogicalVolume and place it in a C++ logical
0080   //       volume
0081   new G4PVPlacement(0,  // no rotation
0082                     G4ThreeVector(0., -20., 0),  // at (x,y,z)
0083                     logicVol,  // its logical volume
0084                     "myBox1",  // its name
0085                     textWorldVol,  // its mother  volume
0086                     false,  // no boolean operations
0087                     0);  // copy number
0088
0089   //----- Place the volume inside a volume of the text geometry
0090   G4LogicalVolume* textSphereVol = G4tgbVolumeMgr::GetInstance()->FindG4LogVol("sphere", 1);
0091   new G4PVPlacement(0,  // no rotation
0092                     G4ThreeVector(0., 0., 0),  // at (x,y,z)
0093                     logicVol,  // its logical volume
0094                     "myBox2",  // its name
0095                     textSphereVol,  // its mother  volume
0096                     false,  // no boolean operations
0097                     1);  // copy number
0098
0099   return physiWorld;
0100 }