如何在matplotlib中使用移动的点对3d参数化绘图进行动画处理？

import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.animation as animation

fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')

def parametric_equation(t):
    r = 1  # 球体半径
    x = r * np.sin(t)
    y = r * np.cos(t)
    z = t
    return x, y, z

point, = ax.plot([], [], [], 'ro')  # 红色圆点

def init():
    ax.set_xlim([-1, 1])  # 设置x轴范围
    ax.set_ylim([-1, 1])  # 设置y轴范围
    ax.set_zlim([0, 10])  # 设置z轴范围
    return point,

def update(frame):
    t = frame * 0.1  # 控制动画速度
    x, y, z = parametric_equation(t)
    point.set_data(x, y)
    point.set_3d_properties(z)
    return point,

ani = animation.FuncAnimation(fig, update, frames=100, init_func=init, blit=True)

plt.show()