import pygame

import time

import random

# 初始化

pygame.init()

# 颜色定义

white = (255, 255, 255)

yellow = (255, 255, 102)

black = (0, 0, 0)

red = (213, 50, 80)

green = (0, 255, 0)

blue = (50, 153, 213)

# 窗口尺寸

width = 600

height = 400

# 创建窗口

game_window = pygame.display.set_mode((width, height))

pygame.display.set_caption('贪吃蛇游戏')

# 时钟

clock = pygame.time.Clock()

# 蛇块大小与速度

block_size = 10

snake_speed = 15

# 字体

font_style = pygame.font.SysFont("bahnschrift", 25)

score_font = pygame.font.SysFont("comicsansms", 35)

# 显示分数

def show_score(score):

value = score_font.render("分数: " + str(score), True, yellow)

game_window.blit(value, [0, 0])

# 画蛇

def draw_snake(block_size, snake_list):

for block in snake_list:

pygame.draw.rect(game_window, green, [block[0], block[1], block_size, block_size])

# 显示消息

def message(msg, color):

mesg = font_style.render(msg, True, color)

game_window.blit(mesg, [width / 6, height / 3])

# 游戏循环

def game_loop():

game_over = False

game_close = False

# 初始位置

x = width / 2

y = height / 2

# 移动增量

x_change = 0

y_change = 0

# 蛇的身体

snake_list = []

snake_length = 1

# 食物位置

food_x = round(random.randrange(0, width - block_size) / 10.0) * 10.0

food_y = round(random.randrange(0, height - block_size) / 10.0) * 10.0

while not game_over:

while game_close:

game_window.fill(blue)

message("按Q退出或C重新开始", red)

show_score(snake_length - 1)

pygame.display.update()

for event in pygame.event.get():

if event.type == pygame.KEYDOWN:

if event.key == pygame.K_q:

game_over = True

game_close = False

if event.key == pygame.K_c:

game_loop()

for event in pygame.event.get():

if event.type == pygame.QUIT:

game_over = True

if event.type == pygame.KEYDOWN:

if event.key == pygame.K_LEFT:

x_change = -block_size

y_change = 0

elif event.key == pygame.K_RIGHT:

x_change = block_size

y_change = 0

elif event.key == pygame.K_UP:

y_change = -block_size

x_change = 0

elif event.key == pygame.K_DOWN:

y_change = block_size

x_change = 0

# 边界检测

if x >= width or x < 0 or y >= height or y < 0:

game_close = True

x += x_change

y += y_change

game_window.fill(black)

pygame.draw.rect(game_window, red, [food_x, food_y, block_size, block_size])

snake_head = []

snake_head.append(x)

snake_head.append(y)

snake_list.append(snake_head)

if len(snake_list) > snake_length:

del snake_list[0]

# 碰撞检测

for block in snake_list[:-1]:

if block == snake_head:

game_close = True

draw_snake(block_size, snake_list)

show_score(snake_length - 1)

pygame.display.update()

# 吃到食物

if x == food_x and y == food_y:

food_x = round(random.randrange(0, width - block_size) / 10.0) * 10.0

food_y = round(random.randrange(0, height - block_size) / 10.0) * 10.0

snake_length += 1

clock.tick(snake_speed)

pygame.quit()

quit()

# 启动游戏

game_loop()