如何用脚本生成简单动画

本文目录导读：

1. Python + Matplotlib（最常用）
2. Python + Turtle（简单绘图）
3. JavaScript + Canvas（网页动画）
4. Bash + ASCII动画
5. 动画效果示例
6. 实用脚本生成GIF动画
7. 使用建议

我来介绍几种用脚本生成简单动画的方法,从基础到进阶：

Python + Matplotlib（最常用）

import matplotlib.pyplot as plt
import numpy as np
from matplotlib.animation import FuncAnimation
# 创建动画
fig, ax = plt.subplots()
x = np.linspace(0, 2*np.pi, 100)
line, = ax.plot(x, np.sin(x))
def update(frame):
    line.set_ydata(np.sin(x + frame/10))
    return line,
# 创建动画
ani = FuncAnimation(fig, update, frames=100, interval=50)
plt.show()
# 保存为gif
ani.save('animation.gif', writer='pillow')

Python + Turtle（简单绘图）

import turtle
# 创建窗口
screen = turtle.Screen()
t = turtle.Turtle()
t.speed(0)
# 动画循环
for i in range(360):
    t.forward(1)
    t.right(1)
    # 清除并重画
    if i % 10 == 0:
        turtle.clearscreen()
turtle.done()

JavaScript + Canvas（网页动画）

<!DOCTYPE html>
<html>
<body>
<canvas id="canvas" width="400" height="400"></canvas>
<script>
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
let x = 0;
let y = 200;
function draw() {
    // 清空画布
    ctx.clearRect(0, 0, canvas.width, canvas.height);
    // 绘制小球
    ctx.beginPath();
    ctx.arc(x, y, 20, 0, Math.PI * 2);
    ctx.fillStyle = 'red';
    ctx.fill();
    // 更新位置
    x = (x + 2) % canvas.width;
    // 递归调用动画
    requestAnimationFrame(draw);
}
draw();
</script>
</body>
</html>

Bash + ASCII动画

#!/bin/bash
# ASCII旋转动画
frames=("|" "/" "-" "\\")
while true; do
    for frame in "${frames[@]}"; do
        echo -ne "\r$frame Loading..."
        sleep 0.1
    done
done

动画效果示例

正弦波动画

import matplotlib.pyplot as plt
import numpy as np
from matplotlib.animation import FuncAnimation
fig, ax = plt.subplots()
ax.set_xlim(0, 2*np.pi)
ax.set_ylim(-1.5, 1.5)
x = np.linspace(0, 2*np.pi, 200)
lines = []
def animate(i):
    # 清除旧线条
    for line in lines:
        line.remove()
    lines.clear()
    # 绘制新波形
    y = np.sin(x + i/10)
    line, = ax.plot(x, y, 'b-', lw=2)
    lines.append(line)
    return lines
ani = FuncAnimation(fig, animate, frames=100, interval=20)
plt.show()

3D旋转立方体

from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.animation import FuncAnimation
fig = plt.figure()
ax = fig.add_subplot(111, projection='3d')
def animate(angle):
    ax.clear()
    # 创建立方体
    vertices = np.array([[-1,-1,-1],[1,-1,-1],[1,1,-1],[-1,1,-1],
                         [-1,-1,1],[1,-1,1],[1,1,1],[-1,1,1]])
    # 旋转矩阵
    theta = np.radians(angle)
    rotation = np.array([[np.cos(theta), -np.sin(theta), 0],
                        [np.sin(theta), np.cos(theta), 0],
                        [0, 0, 1]])
    rotated = np.dot(vertices, rotation.T)
    # 绘制顶点
    ax.scatter(rotated[:,0], rotated[:,1], rotated[:,2])
    # 绘制边
    edges = [(0,1),(1,2),(2,3),(3,0),(4,5),(5,6),(6,7),(7,4),(0,4),(1,5),(2,6),(3,7)]
    for e in edges:
        ax.plot(rotated[[e[0],e[1]],0], rotated[[e[0],e[1]],1], rotated[[e[0],e[1]],2], 'b-')
ani = FuncAnimation(fig, animate, frames=360, interval=20)
plt.show()

实用脚本生成GIF动画

from PIL import Image, ImageDraw
import numpy as np
# 创建多帧图像
frames = []
for i in range(30):
    # 创建新图像
    img = Image.new('RGB', (200, 200), 'white')
    draw = ImageDraw.Draw(img)
    # 绘制移动的圆
    x = i * 6
    draw.ellipse([x, 100, x+20, 120], fill='red')
    frames.append(np.array(img))
# 保存为GIF
frames[0].save('animation.gif',
               save_all=True,
               append_images=frames[1:],
               duration=50,
               loop=0)

使用建议

选择哪种方式主要取决于你的需求和使用场景,如果需要更具体的帮助或想要特定类型的动画，请告诉我！