pygame 贪吃蛇无边界版本源代码

import pygame
import sys
import random
# 初始化pygame
pygame.init()
# 设置窗口的大小，单位为像素
WIDTH,HEIGHT = 640, 480
screen = pygame.display.set_mode((WIDTH,HEIGHT))
# 设置窗口标题
pygame.display.set_caption('标题')
# 字体
my_font = pygame.font.SysFont("arial", 20)
my_font2 = pygame.font.SysFont("arial", 80)
CELLSIZE = 20

darkblue = (0,0,155)
blue = (0,0,255)
darkgreen = (0,155,0)
green = (0 ,255, 0)
darkred = (155,0,0)
red = (255,0,0)
darkyellow = (155,155,0)
yellow = (255,255,0)
darkgray = (40,40,40)
gray = (155,155,155)
white = (255, 255, 255)
food_x = random.randint(1,640//CELLSIZE-2)
food_y = random.randint(1,480//CELLSIZE-2)

startx = random.randint(5,640//CELLSIZE-6)
starty = random.randint(5,480//CELLSIZE-6)
snake_coords = [
    {'x': startx, 'y': starty},
    {'x': startx-1, 'y': starty},
    {'x': startx-2, 'y': starty},
]

direction = 'right'
up = 'up'
down = 'down'
left = 'left'
right = 'right'

score = 0
is_over = False
# 时钟
clock = pygame.time.Clock()

# 程序主循环
while True:
    # ---- 事件处理开始 ----
    for event in pygame.event.get():
        # 判断事件是否为退出事件
        if event.type == pygame.QUIT:
            # 退出pygame
            pygame.quit()
            # 退出系统
            sys.exit()
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_LEFT:
                if direction != right:
                    direction = left
            if event.key == pygame.K_RIGHT:
                if direction != left:
                    direction = right
            if event.key == pygame.K_UP:
                if direction != down:
                    direction = up
            if event.key == pygame.K_DOWN:
                if direction != down:
                    direction = down
    # ---- 事件处理结束 ----

    #----- 逻辑处理开始-----
    if direction == up:
        new_head = {'x':snake_coords[0]['x'],'y':snake_coords[0]['y'] - 1 }
    if direction == down:
        new_head = {'x': snake_coords[0]['x'], 'y': snake_coords[0]['y'] + 1}
    if direction == left:
        new_head = {'x':snake_coords[0]['x']-1,'y':snake_coords[0]['y'] }
    if direction == right:
        new_head = {'x': snake_coords[0]['x']+1, 'y': snake_coords[0]['y']}
    # 增加蛇头
    snake_coords.insert(0,new_head)
    # 删除蛇尾
    snake_coords.pop()
    # 检测是否吃到食物
    if snake_coords[0]['x'] == food_x and snake_coords[0]['y'] == food_y:
        food_x = random.randint(1, 640 // CELLSIZE - 2)
        food_y = random.randint(1, 480 // CELLSIZE - 2)
        score = score + 1
        snake_coords.insert(0, new_head)
    # 设置穿墙
    if snake_coords[0]['y'] < 0:
        snake_coords[0]['y'] = HEIGHT//CELLSIZE
    elif snake_coords[0]['y'] >= HEIGHT//CELLSIZE:
        snake_coords[0]['y'] = 0
    elif snake_coords[0]['x'] < 0:
        snake_coords[0]['x'] = WIDTH//CELLSIZE
    elif snake_coords[0]['x'] >= WIDTH//CELLSIZE:
        snake_coords[0]['x'] = 0
    # 检测是否头有碰到身体
    if snake_coords[0] in snake_coords[3:]:
        is_over = True
    # ----逻辑处理结束------

    # ----- 绘制处理开始-----
    # 设置屏幕背景
    screen.fill((0,0,0))
    # 画网格
    for x in range(0,WIDTH,CELLSIZE):
        pygame.draw.line(screen,darkgray,(x,0),(x,HEIGHT))
    for y in range(0,HEIGHT,CELLSIZE):
        pygame.draw.line(screen,darkgray,(0,y),(WIDTH,y))
    # 画食物
    pygame.draw.rect(screen,red,(food_x*CELLSIZE,food_y*CELLSIZE,CELLSIZE,CELLSIZE))
    # 画蛇
    for coord in snake_coords:
        pygame.draw.rect(screen, darkyellow, (coord['x'] * CELLSIZE, coord['y'] * CELLSIZE, CELLSIZE, CELLSIZE))
        pygame.draw.rect(screen,yellow, (coord['x'] * CELLSIZE+4, coord['y'] * CELLSIZE+4, CELLSIZE-8, CELLSIZE-8))
    # 设置蛇头不同的颜色
    pygame.draw.rect(screen, darkgreen, (snake_coords[0]['x'] * CELLSIZE, snake_coords[0]['y'] * CELLSIZE, CELLSIZE, CELLSIZE))
    pygame.draw.rect(screen, green, (snake_coords[0]['x'] * CELLSIZE + 4, snake_coords[0]['y'] * CELLSIZE + 4, CELLSIZE - 8, CELLSIZE - 8))
    # 画分数
    textImage = my_font.render("Score:"+str(score), True, red)
    screen.blit(textImage, (540, 30))
    # 画失败界面
    if is_over:
        while True:
            textImage = my_font2.render("Game Over", True, red)
            screen.blit(textImage, (150, 200))
            pygame.display.update()
    # ----绘制处理结束------

    # 刷新屏幕
    pygame.display.update()
    # 游戏帧率
    clock.tick(10)