#include "shared/math/coords.hh"

namespace shared {
namespace math {

bool coords::is_inside_draw(const coords& a, const coords& b,
                            const std::int32_t draw_distance) noexcept {
    const auto x2 = (a.x - b.x) * (a.x - b.x);
    const auto z2 = (a.z - b.z) * (a.z - b.z);
    const auto dd2 = draw_distance * draw_distance;

    return (x2 < dd2 - z2) && (z2 < dd2 - x2);
}

coords coords::operator+(const coords& c) const noexcept {
    auto ret = *this;
    ret.x += c.x;
    ret.z += c.z;
    return ret;
}

coords coords::operator-(const coords& c) const noexcept {
    auto ret = *this;
    ret.x -= c.x;
    ret.z -= c.z;
    return ret;
}

} // namespace math
} // namespace shared