@staticmethod
def is_point(line):
    """ Returns true if the specified line is in fact a point.

        'line' is a line segment of form [x0,y0,x1,y1].

        Edge.is_point(np.arr[float(x4)]) -> bool

        """
    x0, y0, x1, y1 = line
    return x0 == x1 and y0 == y1
