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#pragma once
#include "tile.hpp"
#include <type_traits>
#include <array>
namespace Magnum::Examples {
struct chunk final
{
constexpr tile& operator[](local_coords xy) { return _tiles[xy.to_index()]; }
constexpr const tile& operator[](local_coords xy) const { return _tiles[xy.to_index()]; }
constexpr tile& operator[](std::size_t i) { return _tiles[i]; }
constexpr const tile& operator[](std::size_t i) const { return _tiles[i]; }
const auto& tiles() const { return _tiles; }
auto& tiles() { return _tiles; }
template<typename F>
requires std::invocable<F, tile&, std::size_t, local_coords>
constexpr inline void foreach_tile(F&& fun) { foreach_tile_<F, chunk&>(std::forward<F>(fun)); }
template<typename F>
requires std::invocable<F, const tile&, std::size_t, local_coords>
constexpr inline void foreach_tile(F&& fun) const { foreach_tile_<F, const chunk&>(std::forward<F>(fun)); }
private:
template<typename F, typename Self>
constexpr void foreach_tile_(F&& fun);
std::array<tile, TILE_COUNT> _tiles = {};
};
template<typename F, typename Self>
constexpr void chunk::foreach_tile_(F&& fun)
{
constexpr auto N = TILE_MAX_DIM;
std::size_t k = 0;
for (std::size_t j = 0; j < N; j++)
for (std::size_t i = 0; i < N; i++, k++)
fun(const_cast<Self>(*this)._tiles[k], k,
local_coords{(std::uint8_t)i, (std::uint8_t)j});
}
} // namespace Magnum::Examples
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