public static function sector(Point $center, Angle $start, Angle $stop, $radius, $ccw = false)
	{
		$points = new Points($center);
		$points->addPoint($center);
		$points->addPoint($center)->translateX($radius)->rotate($center, $start);
		$points->addPoint($center)->translateX($radius)->rotate($center, $stop);
		$points->reverseIfCcw($ccw);
		return $points;
	}