python 贪吃蛇（源代码）[通俗易懂]

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#话不多说，直接上代码，有需要的小伙伴可以直接拿去用

import pygame
import random
import sys
import time
from pygame.locals import *  # 从pygame模块导入常用的函数和常量

# 定义颜色变量
black_colour = pygame.Color(0, 0, 0)
white_colour = pygame.Color(255, 255, 255)
red_colour = pygame.Color(255, 0, 0)
grey_colour = pygame.Color(150, 150, 150)


# 定义游戏结束函数
def GameOver(gamesurface):
    # 设置提示字体的格式
    GameOver_font = pygame.font.SysFont("MicrosoftYaHei", 16)

    # 设置提示字体的颜色
    GameOver_colour = GameOver_font.render('Game Over', True, grey_colour)

    # 设置提示位置
    GameOver_location = GameOver_colour.get_rect()
    GameOver_location.midtop = (320, 10)
    gamesurface.blit(GameOver_colour, GameOver_location)

    # 提示运行信息
    pygame.display.flip()

    # 等待5秒
    time.sleep(5)

    # 退出游戏
    pygame.quit()

    # 退出程序
    sys.exit()


# 定义主函数
def main():
    # 初始化pygame
    pygame.init()
    pygame.time.Clock()
    ftpsClock = pygame.time.Clock()

    # 创建一个窗口
    gamesurface = pygame.display.set_mode((640, 480))

    # 设置窗口的标题
    pygame.display.set_caption('贪吃蛇~')

    # 初始化变量
    # 初始化贪吃蛇的起始位置
    snakeposition = [100, 100]

    # 初始化贪吃蛇的长度
    snakelength = [[100, 100], [80, 100], [60, 100]]

    # 初始化目标方块的位置
    square_purpose = [300, 300]

    # 初始化一个数来判断目标方块是否存在
    square_position = 1

    # 初始化方向，用来使贪吃蛇移动
    derection = "right"
    change_derection = derection

    # 进行游戏主循环
    while True:
        # 检测按键
        for event in pygame.event.get():
            if event.type == QUIT:
                # 退出程序
                pygame.quit()
                sys.exit()

            elif event.type == KEYDOWN:
                # 判断按的键,用w,s,a,d来表示上下左右
                if event.key == K_RIGHT or event.key == ord('d'):
                    change_derection = "right"
                if event.key == K_LEFT or event.key == ord('a'):
                    change_derection = "left"
                if event.key == K_UP or event.key == ord('w'):
                    change_derection = "up"
                if event.key == K_DOWN or event.key == ord('s'):
                    change_derection = "down"
                if event.key == K_ESCAPE:
                    pygame.event.post(pygame.event.Event(QUIT))

        # 判断移动的方向是否相反
        if change_derection == 'left' and not derection == 'right':
            derection = change_derection
        if change_derection == 'right' and not derection == 'left':
            derection = change_derection
        if change_derection == 'up' and not derection == 'down':
            derection = change_derection
        if change_derection == 'down' and not derection == 'up':
            derection = change_derection

        # 根据方向，改变坐标
        if derection == 'left':
            snakeposition[0] -= 20
        if derection == 'right':
            snakeposition[0] += 20
        if derection == 'up':
            snakeposition[1] -= 20
        if derection == 'down':
            snakeposition[1] += 20

        # 增加蛇的长度
        snakelength.insert(0, list(snakeposition))

        # 判断是否吃掉目标方块
        if snakeposition[0] == square_purpose[0] and snakeposition[1] == square_purpose[1]:
            square_position = 0
        else:
            snakelength.pop()

        # 重新生成目标方块
        if square_position == 0:
            # 随机生成x,y,扩大二十倍，在窗口范围内
            x = random.randrange(1, 32)
            y = random.randrange(1, 24)
            square_purpose = [int(x * 20), int(y * 20)]
            square_position = 1
        # 绘制pygame显示层
        gamesurface.fill(black_colour)
        for position in snakelength:
            pygame.draw.rect(gamesurface, white_colour, Rect(position[0], position[1], 20, 20))
            pygame.draw.rect(gamesurface, red_colour, Rect(square_purpose[0], square_purpose[1], 20, 20))

        # 刷新pygame显示层
        pygame.display.flip()

        # 判断是否死亡
        if snakeposition[0] < 0 or snakeposition[0] > 620:
            GameOver(gamesurface)
        if snakeposition[1] < 0 or snakeposition[1] > 460:
            GameOver(gamesurface)
        for snakebody in snakelength[1:]:
            if snakeposition[0] == snakebody[0] and snakeposition[1] == snakebody[1]:
                GameOver(gamesurface)

        # 控制游戏速度
        ftpsClock.tick(5)


if __name__ == "__main__":
    main()