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//
// This example is provided by the Geant4-DNA collaboration
// Any report or published results obtained using the Geant4-DNA software
// shall cite the following Geant4-DNA collaboration publication:
// Med. Phys. 37 (2010) 4692-4708
// J. Comput. Phys. 274 (2014) 841-882
// The Geant4-DNA web site is available at http://geant4-dna.org
//
//
/// \file DetectorConstruction.cc
/// \brief Implementation of the DetectorConstruction class

#include "DetectorConstruction.hh"
#include "G4SystemOfUnits.hh"
#include "G4ProductionCuts.hh"
#include "G4VPhysicalVolume.hh"
#include "G4LogicalVolume.hh"
#include "G4Box.hh"
#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4PVPlacement.hh"
#include "G4UserLimits.hh"
#include "G4VisAttributes.hh"

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DetectorConstruction::DetectorConstruction() :
    G4VUserDetectorConstruction()
{
}

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DetectorConstruction::~DetectorConstruction()
{
}

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G4VPhysicalVolume* DetectorConstruction::Construct()
{
  return ConstructDetector();
}

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G4Material*
DetectorConstruction::OtherMaterial(G4String materialName)
{
  G4Material * material(0);

  // Water is defined from NIST material database
  G4NistManager * man = G4NistManager::Instance();
  material = man->FindOrBuildMaterial(materialName);
  /*
   If one wishes to test other density value for water material,
   one should use instead:
   G4Material * H2O = man->BuildMaterialWithNewDensity(
   "G4_WATER_MODIFIED",
   "G4_WATER",1000*g/cm/cm/cm);
   Note: any string for "G4_WATER_MODIFIED" parameter is accepted
   and "G4_WATER" parameter should not be changed
   Both materials are created and can be selected from dna.mac
   */

  return material;
}

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G4VPhysicalVolume* DetectorConstruction::ConstructDetector()
{
  G4Material* water = OtherMaterial("G4_WATER");

  // WORLD VOLUME
  double worldSizeX = 10. * micrometer;
  double worldSizeY = worldSizeX;
  double worldSizeZ = worldSizeX;

  G4Box* solidWorld = new G4Box("World", //its name
      worldSizeX / 2, worldSizeY / 2, worldSizeZ / 2); //its size

  G4LogicalVolume* logicWorld = new G4LogicalVolume(solidWorld, //its solid
      water, //its material
      "World"); //its name

  G4VPhysicalVolume* physiWorld = new G4PVPlacement(0, //no rotation
      G4ThreeVector(), //at (0,0,0)
      "World", //its name
      logicWorld, //its logical volume
      0, //its mother  volume
      false, //no boolean operation
      0); //copy number

  // Visualization attributes
  G4VisAttributes* worldVisAtt = new
      G4VisAttributes(G4Colour(1.0, 1.0, 1.0)); //White
  worldVisAtt->SetVisibility(true);
  logicWorld->SetVisAttributes(worldVisAtt);

  return physiWorld;
}
