图💫

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import math
import os

# 设置中文字体
font_style = '宋体'
plt.rcParams['font.family'] = font_style
plt.rcParams['axes.unicode_minus'] = False

# 设置英文字体
english_fonts = []

font_directory = '/storage/emulated/0/文件/字体大全/'

for root, dirs, files in os.walk(font_directory):
    for file in files:
        if file.endswith('.ttf') or file.endswith('.otf'):
            font_path = os.path.join(root, file)
            try:
                with open(font_path, 'rb') as f:
                    font_data = f.read()
                    if b'english' in font_data.lower():
                        english_fonts.append(font_path)
            except Exception as e:
                pass

if len(english_fonts) > 0:
    # 使用第一个可用英语字体
    plt.rcParams['font.sans-serif'] = os.path.splitext(os.path.basename(english_fonts[0]))[0]
else:
    print('No English fonts available')

def update_points(num, data, line):
    line.set_data(data[..., :num])
    return line,


fig, ax = plt.subplots()

theta = np.linspace(0, 2*np.pi, 100)
a = 1
b = 2
x = a * np.cos(theta)
y = b * np.sin(theta)

data = np.array([x, y])

l, = plt.plot([], [], 'r--')
plt.xlim(-3, 3)
plt.ylim(-3, 3)
plt.xlabel('X')
plt.ylabel('Y')
plt.title('行星运动轨迹')

line_ani = animation.FuncAnimation(fig, update_points, 100, fargs=(data, l),
                                   interval=50, blit=True)

# 保存为gif动画
filepath = '/storage/emulated/0/qpython/planet.gif'
line_ani.save(filepath, writer='imagemagick')

print(f'动画已保存至 {filepath}')