bool is_horizontal()
{
    static std::uniform_real_distribution<double> rng{ 0,1 };
    static std::random_device dev{};
    return rng(dev) > 0.5;
}

bool is_vertical()
{
    static std::uniform_real_distribution<double> rng{ 0,1 };
    static std::random_device dev{};
    return rng(dev) < 0.5;
}