function scr_returnwait_gravity(arg0 = id, arg1 = arg0.y, arg2, arg3 = arg0.gravity, arg4 = arg0.vspeed)
{
    var distance = abs(arg2 - arg1);
    var a = arg3 / 2;
    var b = arg4;
    var c = -distance;
    var result = (b * b) - (4 * a * c);
    if (result < 0)
    {
        debug_message("scr_returnwait_gravity() failed, result returned" + string(result));
        return -1;
    }
    var time = (-b + sqrt(result)) / (2 * a);
    return max(floor(time), 1);
}