function scr_getlaunchdirection(arg0, arg1, arg2, arg3)
{
    if ((sqr(arg0) / arg2) <= arg1)
        return 45;
    var __resultangle = radtodeg(arcsin((arg1 * arg2) / sqr(arg0))) / 2;
    if (arg3 >= 1)
        return 90 - __resultangle;
    else if (arg3 <= -1)
        return __resultangle;
    else
        return choose(__resultangle, 90 - __resultangle);
}