pygame实现小球碰撞

Pygame是一个用于开发2D游戏的Python库，可以实现小球碰撞效果。下面是一个简单的示例代码来演示如何使用Pygame实现小球碰撞：

import pygame
import random

# 初始化Pygame
pygame.init()

# 设置窗口大小和标题
width, height = 800, 600
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Ball Collision")

# 定义颜色
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)

# 定义小球类
class Ball:
    def __init__(self, x, y, radius, color):
        self.x = x
        self.y = y
        self.radius = radius
        self.color = color
        self.dx = random.randint(-5, 5)  # 随机生成小球的水平速度
        self.dy = random.randint(-5, 5)  # 随机生成小球的垂直速度

    def move(self):
        self.x += self.dx
        self.y += self.dy

    def draw(self):
        pygame.draw.circle(screen, self.color, (self.x, self.y), self.radius)

    def check_collision(self, other_ball):
        distance = ((self.x - other_ball.x) ** 2 + (self.y - other_ball.y) ** 2) ** 0.5
        if distance <= self.radius + other_ball.radius:
            return True
        else:
            return False

# 创建小球对象列表
balls = []
for _ in range(10):
    x = random.randint(0, width)
    y = random.randint(0, height)
    radius = random.randint(10, 50)
    color = (random.randint(0, 255), random.randint(0, 255), random.randint(0, 255))
    ball = Ball(x, y, radius, color)
    balls.append(ball)

# 游戏主循环
running = True
clock = pygame.time.Clock()
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False

    screen.fill(BLACK)

    # 移动和绘制小球
    for ball in balls:
        ball.move()
        ball.draw()

    # 检测小球碰撞
    for i in range(len(balls)):
        for j in range(i + 1, len(balls)):
            if balls[i].check_collision(balls[j]):
                balls[i].dx *= -1
                balls[i].dy *= -1
                balls[j].dx *= -1
                balls[j].dy *= -1

    pygame.display.flip()
    clock.tick(60)

# 退出游戏
pygame.quit()

这段代码创建了一个窗口，生成了一些随机大小和颜色的小球，并且让它们在窗口中移动。当两个小球碰撞时，它们的速度会反向改变，从而实现了小球的碰撞效果。