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#pragma once
#include "local-coords.hpp"
#include "compat/assert.hpp"
namespace floormat {
struct chunk_coords final {
std::int16_t x = 0, y = 0;
constexpr bool operator==(const chunk_coords& other) const noexcept = default;
constexpr operator std::size_t() const noexcept { return (std::uint32_t)y << 16 | (std::uint32_t)x; }
};
struct global_coords final {
std::uint32_t x = 0, y = 0;
constexpr global_coords(chunk_coords c, local_coords xy) :
x{ std::uint32_t(c.x + (1 << 15)) << 4 | (xy.x & 0x0f) },
y{ std::uint32_t(c.y + (1 << 15)) << 4 | (xy.y & 0x0f) }
{}
constexpr global_coords(std::uint32_t x, std::uint32_t y) noexcept : x{x}, y{y} {}
constexpr global_coords() noexcept = default;
constexpr local_coords local() const noexcept;
constexpr chunk_coords chunk() const noexcept;
constexpr bool operator==(const global_coords& other) const noexcept = default;
};
constexpr local_coords global_coords::local() const noexcept
{
return { (std::uint8_t)(x % TILE_MAX_DIM), (std::uint8_t)(y % TILE_MAX_DIM) };
}
constexpr chunk_coords global_coords::chunk() const noexcept
{
return {
(std::int16_t)(std::int32_t(x >> 4) - (1 << 15)),
(std::int16_t)(std::int32_t(y >> 4) - (1 << 15)),
};
}
} // namespace floormat
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