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geant4/examples/extended/eventgenerator/userPrimaryGenerator/src/DetectorConstruction.cc
T
2018-12-07 15:15:39 +01:00

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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
// * conditions of the Geant4 Software License, included in the file *
// * LICENSE and available at http://cern.ch/geant4/license . These *
// * include a list of copyright holders. *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. Please see the license in the file LICENSE and URL above *
// * for the full disclaimer and the limitation of liability. *
// * *
// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
// * By using, copying, modifying or distributing the software (or *
// * any work based on the software) you agree to acknowledge its *
// * use in resulting scientific publications, and indicate your *
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
/// \file DetectorConstruction.cc
/// \brief Implementation of the DetectorConstruction class
//
//
//
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#include "DetectorConstruction.hh"
#include "G4NistManager.hh"
#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4PVPlacement.hh"
#include "G4SystemOfUnits.hh"
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DetectorConstruction::DetectorConstruction()
: G4VUserDetectorConstruction(),fWorldSizeXY(0),fWorldSizeZ(0)
{
fWorldSizeXY = 2*cm;
fWorldSizeZ = 2*cm;
}
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DetectorConstruction::~DetectorConstruction()
{}
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G4VPhysicalVolume* DetectorConstruction::Construct()
{
//
// define a material
//
G4Material* Air =
G4NistManager::Instance()->FindOrBuildMaterial("G4_AIR");
//
// World
//
G4Box*
solidWorld = new G4Box("World", //its name
fWorldSizeXY/2,fWorldSizeXY/2,fWorldSizeZ/2); //its size
G4LogicalVolume*
logicWorld = new G4LogicalVolume(solidWorld, //its solid
Air, //its material
"World"); //its name
G4VPhysicalVolume*
physiWorld = new G4PVPlacement(0, //no rotation
G4ThreeVector(), //at (0,0,0)
logicWorld, //its logical volume
"World", //its name
0, //its mother volume
false, //no boolean operation
0); //copy number
//
//always return the physical World
//
return physiWorld;
}
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