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/// \file DetectorConstruction.cc
/// \brief Implementation of the DetectorConstruction class

// 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
//
//

#include "DetectorConstruction.hh"

#include "G4Box.hh"
#include "G4LogicalVolume.hh"
#include "G4Material.hh"
#include "G4NistManager.hh"
#include "G4PVPlacement.hh"
#include "G4ProductionCuts.hh"
#include "G4SystemOfUnits.hh"
#include "G4UserLimits.hh"
#include "G4VPhysicalVolume.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(0.0, 0.4, 0.8, 0.5));
  worldVisAtt->SetVisibility(true);
  logicWorld->SetVisAttributes(worldVisAtt);

  return physiWorld;
}
