python做多星环绕

多星环绕是指多个星球绕着一个中心点旋转的运动，下面是实现多星环绕的Python代码：

import pygame
import math

pygame.init()

# 设置窗口大小
screen = pygame.display.set_mode((800, 600))

# 加载背景图片
background = pygame.image.load("background.jpg")

# 加载星球图片
planet1 = pygame.image.load("planet1.png")
planet2 = pygame.image.load("planet2.png")
planet3 = pygame.image.load("planet3.png")

# 获取星球图片的宽度和高度
planet_width = planet1.get_width()
planet_height = planet1.get_height()

# 设置星球的初始位置和半径
planet1_x = 400
planet1_y = 300
planet1_radius = 200

planet2_x = 400
planet2_y = 300
planet2_radius = 300

planet3_x = 400
planet3_y = 300
planet3_radius = 400

# 设置旋转速度
planet1_speed = 0.02
planet2_speed = 0.01
planet3_speed = 0.005

# 游戏循环
while True:
    # 处理退出事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()

    # 绘制背景图片
    screen.blit(background, (0, 0))

    # 计算星球的位置
    planet1_x = 400 + planet1_radius * math.cos(planet1_speed)
    planet1_y = 300 + planet1_radius * math.sin(planet1_speed)

    planet2_x = 400 + planet2_radius * math.cos(planet2_speed)
    planet2_y = 300 + planet2_radius * math.sin(planet2_speed)

    planet3_x = 400 + planet3_radius * math.cos(planet3_speed)
    planet3_y = 300 + planet3_radius * math.sin(planet3_speed)

    # 绘制星球
    screen.blit(planet1, (planet1_x - planet_width / 2, planet1_y - planet_height / 2))
    screen.blit(planet2, (planet2_x - planet_width / 2, planet2_y - planet_height / 2))
    screen.blit(planet3, (planet3_x - planet_width / 2, planet3_y - planet_height / 2))

    # 更新旋转角度
    planet1_speed += 0.02
    planet2_speed += 0.01
    planet3_speed += 0.005

    # 更新屏幕
    pygame.display.update()

在这个代码中，我们使用了pygame库来实现多星环绕的效果。首先，我们加载了背景图片和三个星球的图片，并设置了它们的初始位置和半径。然后，在游戏循环中，我们计算了每个星球的位置，并绘制了它们。最后，我们更新了旋转角度，并更新了屏幕。