def is_in(self, point_x, point_y):
        """ Test if a point is within this polygonal region """

        point_array = array(((point_x, point_y),))
        vertices = array(self.points)
        winding = self.inside_rule == "winding"
        result = points_in_polygon(point_array, vertices, winding)
        return result[0]
Test if a point is within this polygonal region