使用pygame制作贪吃蛇小游戏

Posted 2021-09-16 Gendan

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("WebMoney下载贪吃蛇背景音乐.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 = 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()