贪吃蛇

import pygame
import random

# 初始化 Pygame
pygame.init()

# 游戏窗口设置
WINDOW_WIDTH = 800
WINDOW_HEIGHT = 600
screen = pygame.display.set_mode((WINDOW_WIDTH, WINDOW_HEIGHT))
pygame.display.set_caption("Pygame 叶柯鑫贪吃蛇")

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

# 蛇身初始数据
snake_body = [(WINDOW_WIDTH // 2, WINDOW_HEIGHT // 2)]
snake_direction = "RIGHT"
snake_speed = 10  # 移动步长（像素）

# 食物数据
food_position = (
    random.randint(0, (WINDOW_WIDTH - 10) // 10) * 10,
    random.randint(0, (WINDOW_HEIGHT - 10) // 10) * 10
)

# 得分与字体
score = 0
font = pygame.font.SysFont(None, 30)

# 时钟（控制帧率）
clock = pygame.time.Clock()

# 蛇移动函数
def move_snake():
    global snake_body, snake_direction
    head_x, head_y = snake_body[0]
    # 根据方向更新蛇头坐标
    if snake_direction == "UP":
        new_head = (head_x, head_y - snake_speed)
    elif snake_direction == "DOWN":
        new_head = (head_x, head_y + snake_speed)
    elif snake_direction == "LEFT":
        new_head = (head_x - snake_speed, head_y)
    else:
        new_head = (head_x + snake_speed, head_y)
    # 插入新蛇头
    snake_body.insert(0, new_head)
    # 检查是否吃到食物
    global score, food_position
    if new_head == food_position:
        score += 10
        # 重新生成食物
        food_position = (
            random.randint(0, (WINDOW_WIDTH - 10) // 10) * 10,
            random.randint(0, (WINDOW_HEIGHT - 10) // 10) * 10
        )
    else:
        # 未吃到食物，删除尾部保持长度
        snake_body.pop()

# 碰撞检测函数
def check_collision():
    head_x, head_y = snake_body[0]
    # 边界碰撞
    if (head_x < 0 or head_x >= WINDOW_WIDTH or 
        head_y < 0 or head_y >= WINDOW_HEIGHT):
        return True
    # 自身碰撞（蛇头与身体其他节）
    for segment in snake_body[1:]:
        if segment == (head_x, head_y):
            return True
    return False

# 绘制函数
def draw_objects():
    screen.fill(BLACK)
    # 绘制蛇身
    for segment in snake_body:
        pygame.draw.rect(screen, GREEN, (segment[0], segment[1], 10, 10))
    # 绘制食物
    pygame.draw.circle(screen, RED, (food_position[0] + 5, food_position[1] + 5), 5)
    # 绘制得分
    score_text = font.render(f"得分: {score}", True, WHITE)
    screen.blit(score_text, (10, 10))
    pygame.display.update()

# 主循环
game_over = False
while not game_over:
    # 处理事件
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            game_over = True
        elif event.type == pygame.KEYDOWN:
            # 方向控制（防止反向）
            if event.key == pygame.K_UP and snake_direction != "DOWN":
                snake_direction = "UP"
            elif event.key == pygame.K_DOWN and snake_direction != "UP":
                snake_direction = "DOWN"
            elif event.key == pygame.K_LEFT and snake_direction != "RIGHT":
                snake_direction = "LEFT"
            elif event.key == pygame.K_RIGHT and snake_direction != "LEFT":
                snake_direction = "RIGHT"

    # 移动蛇
    move_snake()

    # 检测碰撞
    if check_collision():
        game_over = True

    # 绘制画面
    draw_objects()

    # 控制帧率（每秒 10 帧，可调整速度）
    clock.tick(10)

# 游戏结束提示
font_large = pygame.font.SysFont(None, 50)
game_over_text = font_large.render("游戏结束", True, RED)
screen.blit(game_over_text, (WINDOW_WIDTH // 2 - 100, WINDOW_HEIGHT // 2 - 25))
pygame.display.update()
pygame.time.wait(3000)

# 退出 Pygame
pygame.quit()