用python写一个射击游戏

好的，以下是一个简单的射击游戏的Python代码：

import pygame
import random

# 初始化游戏
pygame.init()

# 定义游戏窗口大小
WINDOW_WIDTH = 800
WINDOW_HEIGHT = 600

# 创建游戏窗口
screen = pygame.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT))
pygame.display.set_caption("射击游戏")

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

# 加载图像
background = pygame.image.load("background.jpg")
player = pygame.image.load("player.png")
bullet = pygame.image.load("bullet.png")
enemy = pygame.image.load("enemy.png")

# 获取图像大小
player_width, player_height = player.get_size()
bullet_width, bullet_height = bullet.get_size()
enemy_width, enemy_height = enemy.get_size()

# 设置字体
font = pygame.font.SysFont(None, 48)

# 初始化游戏变量
player_x = WINDOW_WIDTH // 2 - player_width // 2
player_y = WINDOW_HEIGHT - player_height - 10
player_speed = 5
bullet_speed = 10
enemy_speed = 3
score = 0
clock = pygame.time.Clock()

# 定义函数：绘制文本
def draw_text(text, color, x, y):
    text_surface = font.render(text, True, color)
    text_rect = text_surface.get_rect()
    text_rect.center = (x, y)
    screen.blit(text_surface, text_rect)

# 定义函数：绘制玩家
def draw_player(x, y):
    screen.blit(player, (x, y))

# 定义函数：绘制子弹
def draw_bullet(x, y):
    screen.blit(bullet, (x, y))

# 定义函数：绘制敌人
def draw_enemy(x, y):
    screen.blit(enemy, (x, y))

# 定义函数：检测碰撞
def is_collision(x1, y1, w1, h1, x2, y2, w2, h2):
    if x1 + w1 >= x2 and x1 <= x2 + w2 and y1 + h1 >= y2 and y1 <= y2 + h2:
        return True
    else:
        return False

# 游戏循环
running = True
while running:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                player_x -= player_speed
            elif event.key == pygame.K_RIGHT:
                player_x += player_speed
            elif event.key == pygame.K_SPACE:
                bullet_x = player_x + player_width // 2 - bullet_width // 2
                bullet_y = player_y - bullet_height
                bullet_active = True

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

    # 绘制玩家
    draw_player(player_x, player_y)

    # 移动子弹
    if bullet_active:
        bullet_y -= bullet_speed
        draw_bullet(bullet_x, bullet_y)
        if bullet_y < -bullet_height:
            bullet_active = False

    # 绘制敌人并移动
    draw_enemy(enemy_x, enemy_y)
    enemy_y += enemy_speed
    if enemy_y > WINDOW_HEIGHT:
        enemy_x = random.randint(0, WINDOW_WIDTH - enemy_width)
        enemy_y = -enemy_height
        score += 1

    # 检测碰撞
    if is_collision(bullet_x, bullet_y, bullet_width, bullet_height, enemy_x, enemy_y, enemy_width, enemy_height):
        bullet_active = False
        enemy_x = random.randint(0, WINDOW_WIDTH - enemy_width)
        enemy_y = -enemy_height
        score += 10
    elif is_collision(player_x, player_y, player_width, player_height, enemy_x, enemy_y, enemy_width, enemy_height):
        running = False

    # 显示分数
    draw_text("Score: " + str(score), WHITE, WINDOW_WIDTH // 2, 50)

    # 更新屏幕
    pygame.display.update()

    # 控制帧率
    clock.tick(60)

# 退出游戏
pygame.quit()

请注意，这只是一个简单的示例代码，您可以根据自己的需要进行修改和扩展。