DDG4DetectorConstruction.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2017-2021 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once

#include "ActsExamples/Geant4/DetectorConstructionFactory.hpp"

#include <memory>

#include <G4VUserDetectorConstruction.hh>

class G4VPhysicalVolume;

namespace dd4hep {
class Detector;
}
namespace ActsExamples {

namespace DD4hep {
struct DD4hepDetector;
}

class DDG4DetectorConstruction final : public G4VUserDetectorConstruction {
 public:
  DDG4DetectorConstruction(std::shared_ptr<DD4hep::DD4hepDetector> detector);
  ~DDG4DetectorConstruction() final;

  G4VPhysicalVolume* Construct() final;

 private:
  std::shared_ptr<DD4hep::DD4hepDetector> m_detector;
  G4VPhysicalVolume* m_world = nullptr;

  dd4hep::Detector& dd4hepDetector() const;
};

class DDG4DetectorConstructionFactory final
    : public DetectorConstructionFactory {
 public:
  DDG4DetectorConstructionFactory(
      std::shared_ptr<DD4hep::DD4hepDetector> detector);
  ~DDG4DetectorConstructionFactory() final;

  std::unique_ptr<G4VUserDetectorConstruction> factorize() const override;

 private:
  std::shared_ptr<DD4hep::DD4hepDetector> m_detector;
};

}  // namespace ActsExamples