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 //------------------------------- -*- C++ -*- -------------------------------//
 // Copyright Celeritas contributors: see top-level COPYRIGHT file for details
 // SPDX-License-Identifier: (Apache-2.0 OR MIT)
 //---------------------------------------------------------------------------//
 //! \file orange/OrangeInput.hh
 //---------------------------------------------------------------------------//
 #pragma once
 
 #include <algorithm>
 #include <iosfwd>
 #include <map>
 #include <variant>
 #include <vector>
 
 #include "corecel/io/Label.hh"
 #include "geocel/BoundingBox.hh"
 
 #include "OrangeData.hh"
 #include "OrangeTypes.hh"
 #include "surf/VariantSurface.hh"
 #include "transform/VariantTransform.hh"
 
 namespace celeritas
 {
 //---------------------------------------------------------------------------//
 /*!
  * Input definition for a single oriented bounding zone.
  */
 struct OrientedBoundingZoneInput
 {
     //! Inner bounding box
     BBox inner;
     //! Outer bounding box
     BBox outer;
     //! Local to global transformation
     TransformId trans_id;
 
     //! Whether the obz definition is valid
     explicit operator bool() const { return inner && outer && trans_id; }
 };
 
 //---------------------------------------------------------------------------//
 /*!
  * Input definition for a single volume.
  */
 struct VolumeInput
 {
     using Flags = VolumeRecord::Flags;
 
     //! Volume label
     Label label{};
 
     //! Sorted list of surface IDs in this volume
     std::vector<LocalSurfaceId> faces{};
     //! RPN region definition for this volume, using local surface index
     std::vector<logic_int> logic{};
     //! Axis-aligned bounding box
     BBox bbox{};
     //! OrientedBoundingZone
     OrientedBoundingZoneInput obz;
 
     //! Special flags
     logic_int flags{0};
     //! Masking priority
     ZOrder zorder{};
 
     //! Whether the volume definition is valid
     explicit operator bool() const
     {
         return (!logic.empty() || (flags & Flags::implicit_vol))
                && zorder != ZOrder::invalid;
     }
 };
 
 //---------------------------------------------------------------------------//
 /*!
  * Input definition a daughter universe embedded in a parent cell.
  */
 struct DaughterInput
 {
     UniverseId universe_id;
     VariantTransform transform;
 };
 
 //---------------------------------------------------------------------------//
 /*!
  * Input definition for a unit.
  *
  * \todo Add a CsgTree object and \c vector<NodeId> volumes;
  */
 struct UnitInput
 {
     using MapVolumeDaughter = std::map<LocalVolumeId, DaughterInput>;
 
     std::vector<VariantSurface> surfaces;
     std::vector<VolumeInput> volumes;
     BBox bbox;  //!< Outer bounding box
     MapVolumeDaughter daughter_map;
 
     // Unit metadata
     std::vector<Label> surface_labels;
     Label label;
 
     //! Whether the unit definition is valid
     explicit operator bool() const { return !volumes.empty(); }
 };
 
 //---------------------------------------------------------------------------//
 /*!
  * Input definition for a rectangular array universe.
  */
 struct RectArrayInput
 {
     // Grid boundaries in x, y, and z
     Array<std::vector<double>, 3> grid;
 
     // Daughters in each cell [x][y][z]
     std::vector<DaughterInput> daughters;
 
     // Unit metadata
     Label label;
 
     //! Whether the universe definition is valid
     explicit operator bool() const
     {
         return !daughters.empty()
                && std::all_of(grid.begin(), grid.end(), [](auto& v) {
                       return v.size() >= 2;
                   });
     }
 };
 
 //---------------------------------------------------------------------------//
 //! Possible types of universe inputs
 using VariantUniverseInput = std::variant<UnitInput, RectArrayInput>;
 
 //---------------------------------------------------------------------------//
 /*!
  * Construction definition for a full ORANGE geometry.
  */
 struct OrangeInput
 {
     std::vector<VariantUniverseInput> universes;
 
     //! Relative and absolute error for construction and transport
     Tolerance<> tol;
 
     //! Whether the unit definition is valid
     explicit operator bool() const { return !universes.empty() && tol; }
 };
 
 //---------------------------------------------------------------------------//
 // Helper to read the input from a file or stream
 std::istream& operator>>(std::istream& is, OrangeInput&);
 
 //---------------------------------------------------------------------------//
 // Helper to write the input to a file or stream
 std::ostream& operator<<(std::ostream& os, OrangeInput const&);
 
 //---------------------------------------------------------------------------//
 }  // namespace celeritas

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