使用pygame制作贪吃蛇小游戏

import pygame

import sys

import random

from pygame.locals import *

#初始化

pygame.init()        #初始化pygame

pygame.mixer.init()  #初始化混音器

#制作窗口

playSurface = pygame.display.set_mode((800,800))  #定义窗口大小

pygame.display.set_caption("贪吃蛇")  #定义标题

#添加音乐

pygame.mixer.music.load("贪吃蛇背景音乐.mp3")

pygame.mixer.music.play(-1)

#结束游戏

def gameover():

    pygame.quit()   #退出pygame窗口

    sys.exit()      #退出程序

#颜色设置

snakeBody_color = pygame.Color(0,255,0) #绿色

food_color = pygame.Color(255,0,0) #红色

def main():

    time_clock = pygame.time.Clock() #定义一个变量来控制速度

    #绘制蛇与果实

    snakePosition = [200,200]                       #蛇头位置

    snakeBodys = [[200,200],[180,200],[160,200]]    #蛇身位置

    foodPosition = [500,500]        #果实位置

    foodTotal = 1                   #果实数量

    foodNumber = 1                  #用于增加速度的变量

    direction = 'right'             #初始方向向右

    changeDirection = direction     #定义一个改变方向的变量，按键

    speed = 4  #定义初始速度

    while True:

        for event in pygame.event.get():   #从队列中获取事件

            #退出事件

            if event.type == QUIT:

                pygame.quit()

                sys.exit()

            #按键事件

            elif event.type == KEYDOWN:

                if event.key == K_RIGHT or event.key == K_d:

                    changeDirection = 'right'

                if event.key == K_LEFT or event.key == K_a:

                    changeDirection = 'left'

                if event.key == K_UP or event.key == K_w:

                    changeDirection = 'up'

                if event.key == K_DOWN or event.key == K_s:

                    changeDirection = 'down'

                if event.key == K_ESCAPE:

                    pygame.event.post(pygame.event.Event(QUIT))

        #防止蛇反方向移动

        if changeDirection == 'right' and not direction == 'left':

            direction = changeDirection

        if changeDirection == 'left' and not direction == 'right':

            direction = 货币代码changeDirection

        if changeDirection == 'up' and not direction == 'down':

            direction = changeDirection

        if changeDirection == 'down' and not direction == 'up':

            direction = changeDirection

        #根据方向移动蛇头

        if direction == 'right':

            snakePosition[0] += 20

        if direction == 'left':

            snakePosition[0] -= 20

        if direction == 'up':

            snakePosition[1] -= 20

        if direction == 'down':

            snakePosition[1] += 20

        snakeBodys.insert(0, list(snakePosition))  #增加蛇的长度

        #判断是否吃到食物

        if snakePosition[0] == foodPosition[0] and snakePosition[1] == foodPosition[1]:

            foodTotal = 0

        else:

            snakeBodys.pop()  #每次将最后一个单位的蛇身去除列表

        #重新生成食物

        if foodTotal == 0:

            x = random.randrange(1,40)

            y = random.randrange(1,40)

            foodPosition = [int(x*20), int(y*20)]

            foodTotal = 1

            foodNumber += 1    

        #防止食物生成在蛇身上

        for body in snakeBodys[1:]:

            if foodPosition[0] == body[0] and foodPosition[1] == body[1]:

                foodTotal = 0

                foodNumber -=1

        #设置递增速度

        if foodNumber % 5 ==0:

            speed += 1

            foodNumber = 1

        #绘制游戏背景

        background = pygame.image.load("河海大学校标.jpg")

        playSurface.blit(background,(0,0))

        pygame.display.update()

        #画出蛇与果实

        for position in snakeBodys:

            pygame.draw.rect(playSurface,snakeBody_color, Rect(position[0], position[1], 20, 20))

            pygame.draw.rect(playSurface, food_color, Rect(foodPosition[0], foodPosition[1], 20, 20))

        pygame.display.flip()  #更新显示到屏幕表面

        #超出边框结束游戏

        if snakePosition[0] > 800 or snakePosition[0] < 0:

            gameover()

        elif snakePosition[1] > 800 or snakePosition[1] < 0:

            gameover()

        #碰到身体结束游戏

        for body in snakeBodys[1:]:

            if snakePosition[0] == body[0] and snakePosition[1] == body[1]:

                gameover()

        # 控制游戏速度

        time_clock.tick(speed)

#入口函数

if __name__ == "__main__":

    main()