# Add a vertex to the polygon
	#
	# ~~~
	# var p1 = new Point[Float](0.0, 0.0)
	# var p2 = new Point[Float](5.0, 0.0)
	# var p3 = new Point[Float](0.0, 5.0)
	# var p4 = new Point[Float](5.0, 5.0)
	# var arr = new Array[Point[Float]].with_items(p1, p2, p3, p4)
	# var poly = new ConvexPolygon(arr)
	# var p5 = new Point[Float](2.5, 7.5)
	# assert poly.add_vertex(p5)
	# ~~~
	redef fun add_vertex(p) do
		assert points.length >= 3
		var temp_list = points.clone
		temp_list.add(p)
		var temp_polygon = new ConvexPolygon(temp_list)
		temp_polygon.sort_ccw
		if temp_polygon.is_convex then
			points = temp_polygon.points
			return true
		else
			return false
		end
	end