Geant4 Cross Reference

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Geant4/examples/extended/eventgenerator/pythia/py8decayer/src/DetConstruction.cc

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 26 //
 27 /// \file eventgenerator/pythia/pythia8decayer/src/DetConstruction.cc
 28 /// \brief Implementation of the DetConstruction class
 29 ///
 30 /// \author J. Yarba; FNAL
 31 
 32 #include "DetConstruction.hh"
 33 
 34 #include "G4Box.hh"
 35 #include "G4LogicalVolume.hh"
 36 #include "G4Material.hh"
 37 #include "G4NistManager.hh"
 38 #include "G4PVPlacement.hh"
 39 #include "G4Tubs.hh"
 40 
 41 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 42 
 43 G4VPhysicalVolume* DetConstruction::Construct()
 44 {
 45   // Define materials via NIST manager
 46 
 47   auto worldMaterial = G4NistManager::Instance()->FindOrBuildMaterial("G4_AIR");
 48   auto detMaterial = G4NistManager::Instance()->FindOrBuildMaterial("G4_C");
 49 
 50   // World volume
 51 
 52   G4ThreeVector worldSize(200. * CLHEP::cm, 200. * CLHEP::cm, 200. * CLHEP::cm);
 53 
 54   fWorld =
 55     new G4PVPlacement(0, G4ThreeVector(), "world_phys",
 56                       new G4LogicalVolume(new G4Box("world_solid", 0.5 * worldSize.x(),
 57                                                     0.5 * worldSize.y(), 0.5 * worldSize.z()),
 58                                           worldMaterial, "world_log", 0, 0, 0),
 59                       0, false, 0);
 60 
 61   // "Detector"
 62 
 63   double rmin = 10. * CLHEP::cm;
 64   double rmax = 80. * CLHEP::cm;
 65   double zlength = 98. * CLHEP::cm;
 66 
 67   G4VSolid* sDet = new G4Tubs("det_solid", rmin, rmax, 0.5 * zlength, 0., 2. * CLHEP::pi);
 68 
 69   G4LogicalVolume* lDet = new G4LogicalVolume(sDet, detMaterial, "det_log", 0, 0, 0);
 70 
 71   fDet = new G4PVPlacement(0, G4ThreeVector(), "det_phys", lDet,
 72                            fWorld,  // it's mother (physical) volume
 73                            false, 0);
 74 
 75   // always return the root volume
 76   //
 77   return fWorld;
 78 }
 79 
 80 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
 81