一个python简单的射击游戏

import pygame
import random
import sys

# 初始化
pygame.init()
screen = pygame.display.set_mode((800, 600))
pygame.display.set_caption("简单射击游戏")
clock = pygame.time.Clock()

# 玩家
class Player(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface((50, 40))
        self.image.fill((0, 255, 0))
        self.rect = self.image.get_rect()
        self.rect.centerx = screen.get_width() // 2
        self.rect.bottom = screen.get_height() - 10
        self.speed = 8
    
    def update(self):
        keys = pygame.key.get_pressed()
        if keys[pygame.K_LEFT] and self.rect.left > 0:
            self.rect.x -= self.speed
        if keys[pygame.K_RIGHT] and self.rect.right < screen.get_width():
            self.rect.x += self.speed
    
    def shoot(self):
        bullet = Bullet(self.rect.centerx, self.rect.top)
        all_sprites.add(bullet)
        bullets.add(bullet)

# 子弹
class Bullet(pygame.sprite.Sprite):
    def __init__(self, x, y):
        super().__init__()
        self.image = pygame.Surface((5, 10))
        self.image.fill((255, 255, 0))
        self.rect = self.image.get_rect()
        self.rect.centerx = x
        self.rect.bottom = y
        self.speed = -10
    
    def update(self):
        self.rect.y += self.speed
        if self.rect.bottom < 0:
            self.kill()

# 敌机
class Enemy(pygame.sprite.Sprite):
    def __init__(self):
        super().__init__()
        self.image = pygame.Surface((30, 30))
        self.image.fill((255, 0, 0))
        self.rect = self.image.get_rect()
        self.rect.x = random.randrange(screen.get_width() - self.rect.width)
        self.rect.y = random.randrange(-100, -40)
        self.speedy = random.randrange(1, 4)
    
    def update(self):
        self.rect.y += self.speedy
        if self.rect.top > screen.get_height():
            self.rect.x = random.randrange(screen.get_width() - self.rect.width)
            self.rect.y = random.randrange(-100, -40)
            self.speedy = random.randrange(1, 4)

# 创建精灵组
all_sprites = pygame.sprite.Group()
enemies = pygame.sprite.Group()
bullets = pygame.sprite.Group()
player = Player()
all_sprites.add(player)

# 生成敌机
for i in range(8):
    e = Enemy()
    all_sprites.add(e)
    enemies.add(e)

# 分数
score = 0
font = pygame.font.SysFont(None, 36)

# 游戏主循环
running = True
while running:
    # 保持游戏运行速度
    clock.tick(60)
    
    # 事件处理
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_SPACE:
                player.shoot()
    
    # 更新
    all_sprites.update()
    
    # 检测子弹和敌机的碰撞
    hits = pygame.sprite.groupcollide(bullets, enemies, True, True)
    for hit in hits:
        score += 1
        e = Enemy()
        all_sprites.add(e)
        enemies.add(e)
    
    # 检测玩家和敌机的碰撞
    hits = pygame.sprite.spritecollide(player, enemies, False)
    if hits:
        running = False
    
    # 渲染
    screen.fill((0, 0, 0))
    all_sprites.draw(screen)
    
    # 显示分数
    score_text = font.render(f"分数: {score}", True, (255, 255, 255))
    screen.blit(score_text, (10, 10))
    
    # 刷新屏幕
    pygame.display.flip()

# 退出游戏
pygame.quit()
sys.exit()