code: public static function fromPolarDeg($length, $ap, $av)
    {
      return static::fromPolar($length, deg2rad($ap), deg2rad($av));
    }
docs: Construct coordinate by the vector length and direction (in degrees).
  
  @param $length the vector length
  @param $ap angle in XY plane (in degrees)
  @param $av angle off XY plane (in degrees)