polygons.py 文件源码

def random_polygon(segments=8, radius=1.0):
    '''
    Generate a random polygon with a maximum number of sides and approximate radius.

    Arguments
    ---------
    segments: int, the maximum number of sides the random polygon will have
    radius:   float, the approximate radius of the polygon desired

    Returns
    ---------
    polygon: shapely.geometry.Polygon object with random exterior, and no interiors. 
    '''
    angles = np.sort(np.cumsum(np.random.random(segments)*np.pi*2) % (np.pi*2))
    radii  = np.random.random(segments)*radius
    points = np.column_stack((np.cos(angles), np.sin(angles)))*radii.reshape((-1,1))
    points = np.vstack((points, points[0]))
    polygon = Polygon(points).buffer(0.0)
    if is_sequence(polygon):
        return polygon[0]
    return polygon