fn_get3DENRotation.sqf

CBA_fnc_get3DENRotation = {
    params ["_object"];

    private _dir = vectorDir _object;
    _dir params ["_xDir", "_yDir", "_zDir"];

    private _up = vectorUp _object;
    _up params ["_xUp", "_yUp", "_zUp"];

    private _side = _dir vectorCrossProduct _up;
    _side params ["_xSide", "_ySide", "_zSide"];

    private _xRot = _yUp atan2 _zUp;
    private _yRot = -_xUp atan2 sqrt (1 - (_xUp ^ 2));
    private _zRot = _xDir atan2 _xSide;

    [_xRot, _yRot, _zRot]
};