Function variableUpdate

src/OpenLoco/src/OpenLoco.cpp:669–688

    constexpr auto TimeScale = 1.0;

    static void variableUpdate()
    {
        auto& tweener = EntityTweener::get();

        const auto alpha = std::min<float>(_accumulator / UpdateTime, 1.0);

        while (_accumulator > UpdateTime)
        {
            tweener.preTick();

            tick();
            _accumulator -= UpdateTime;

            tweener.postTick();
        }

        tweener.tween(alpha);

        Ui::render();
    }

    static void fixedUpdate()
    {