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#pragma once
#include "tile.hpp"
#include "tile-iterator.hpp"
#include <type_traits>
#include <array>
#include <bitset>
namespace floormat {
struct chunk final
{
friend struct tile_ref;
friend struct pass_mode_ref;
tile_ref operator[](std::size_t idx) noexcept { return { *this, std::uint8_t(idx) }; }
tile_proto operator[](std::size_t idx) const noexcept { return tile_proto(tile_ref { *const_cast<chunk*>(this), std::uint8_t(idx) }); }
tile_ref operator[](local_coords xy) noexcept { return operator[](xy.to_index()); }
tile_proto operator[](local_coords xy) const noexcept { return operator[](xy.to_index()); }
using iterator = tile_iterator;
iterator begin() noexcept { return iterator { *this, 0 }; }
iterator end() noexcept { return iterator { *this, TILE_COUNT }; }
bool empty(bool force = false) const noexcept;
chunk() noexcept = default;
fm_DECLARE_DELETED_COPY_ASSIGNMENT(chunk);
fm_DECLARE_DEFAULT_MOVE_ASSIGNMENT_(chunk);
private:
static constexpr std::size_t PASS_BITS = 2;
std::array<std::shared_ptr<tile_atlas>, TILE_COUNT> _ground_atlases, _wall_north_atlases, _wall_west_atlases;
std::array<std::uint16_t, TILE_COUNT> _ground_variants = {}, _wall_north_variants = {}, _wall_west_variants = {};
std::bitset<TILE_COUNT*2> _passability = {};
mutable bool _maybe_empty = true;
};
} // namespace floormat
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