python入侵外星人200行代码小游戏

以下是一个简单的 Python 小游戏，名为“入侵外星人”。这个游戏的目标是射击下降的外星人并得分。游戏有 3 层外星人，每层外星人的移动速度不同，游戏难度逐渐增加。

import pygame
import sys
from random import randint

pygame.init()

# 游戏设置
width = 800
height = 600
screen = pygame.display.set_mode((width, height))
pygame.display.set_caption("Alien Invasion")
clock = pygame.time.Clock()

# 颜色设置
white = (255, 255, 255)
black = (0, 0, 0)

# 字体设置
font = pygame.font.Font(None, 36)

# 外星人设置
alien_width = 50
alien_height = 50
alien_speed = 5
alien_color = (randint(0, 255), randint(0, 255), randint(0, 255))

# 玩家设置
player_width = 50
player_height = 50
player_speed = 10
player_color = (0, 255, 0)

# 子弹设置
bullet_width = 5
bullet_height = 20
bullet_speed = 10
bullet_color = (255, 0, 0)

# 游戏状态
game_over = False
score = 0

# 外星人生成函数
def generate_aliens(num_rows, num_cols):
    aliens = []
    for row in range(num_rows):
        for col in range(num_cols):
            alien = {
                "x": col * alien_width,
                "y": row * alien_height,
                "color": (randint(0, 255), randint(0, 255), randint(0, 255))
            }
            aliens.append(alien)
    return aliens

# 子弹生成函数
def generate_bullet(player_x, player_y):
    bullet = {
        "x": player_x + player_width / 2 - bullet_width / 2,
        "y": player_y - bullet_height,
    }
    return bullet

# 碰撞检测函数
def collide(rect1, rect2):
    if (rect1["x"] < rect2["x"] + rect2["width"] and
        rect1["x"] + rect1["width"] > rect2["x"] and
        rect1["y"] < rect2["y"] + rect2["height"] and
        rect1["y"] + rect1["height"] > rect2["y"]):
        return True
    return False

# 游戏循环
def game_loop():
    global game_over, score

    # 外星人生成
    aliens = generate_aliens(3, 10)

    # 玩家初始化
    player_x = width / 2 - player_width / 2
    player_y = height - player_height
    player_speed_x = 0

    # 子弹列表初始化
    bullets = []

    while not game_over:

        # 事件循环
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                sys.exit()
            elif event.type == pygame.KEYDOWN:
                if event.key == pygame.K_LEFT:
                    player_speed_x = -player_speed
                elif event.key == pygame.K_RIGHT:
                    player_speed_x = player_speed
                elif event.key == pygame.K_SPACE:
                    bullet = generate_bullet(player_x, player_y)
                    bullets.append(bullet)
            elif event.type == pygame.KEYUP:
                if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
                    player_speed_x = 0

        # 碰撞检测
        for bullet in bullets:
            for alien in aliens:
                if collide(bullet, alien):
                    bullets.remove(bullet)
                    aliens.remove(alien)
                    score += 10

        for alien in aliens:
            if collide(alien, {"x": player_x, "y": player_y, "width": player_width, "height": player_height}):
                game_over = True

        # 外星人移动
        for alien in aliens:
            alien["y"] += alien_speed
            if alien["y"] >= height:
                game_over = True

        # 玩家移动
        player_x += player_speed_x
        if player_x < 0:
            player_x = 0
        elif player_x > width - player_width:
            player_x = width - player_width

        # 子弹移动
        for bullet in bullets:
            bullet["y"] -= bullet_speed
            if bullet["y"] < 0:
                bullets.remove(bullet)

        # 绘制画面
        screen.fill(black)

        for alien in aliens:
            pygame.draw.rect(screen, alien["color"], [alien["x"], alien["y"], alien_width, alien_height])

        pygame.draw.rect(screen, player_color, [player_x, player_y, player_width, player_height])

        for bullet in bullets:
            pygame.draw.rect(screen, bullet_color, [bullet["x"], bullet["y"], bullet_width, bullet_height])

        text = font.render(f"Score: {score}", True, white)
        screen.blit(text, (10, 10))

        pygame.display.update()

        # 控制游戏速度
        clock.tick(30)

    # 游戏结束
    screen.fill(black)
    text = font.render("Game Over", True, white)
    screen.blit(text, (width / 2 - 50, height / 2 - 18))
    text = font.render(f"Score: {score}", True, white)
    screen.blit(text, (width / 2 - 50, height / 2 + 18))
    pygame.display.update()
    pygame.time.delay(2000)


# 启动游戏
game_loop()

这个游戏使用了 Pygame 库来实现图形界面和事件响应。游戏界面中有外星人、玩家和子弹三种元素，玩家可以通过键盘控制玩家的移动和子弹的射击，同时需要注意外星人的攻击。游戏难度逐步增加，游戏难度越来越高。