`
import random
import sys
import time
import pygame
from pygame.localsimport *
from collectionsimport deque
# 基础设置
Screen_Height =480
Screen_Width =600
Size =20 # 小方格大小
Line_Width =1
# 游戏区域的坐标范围
Area_x = (0, Screen_Width // Size -1)# 0是左边界，1是右边界 #注：python中//为整数除法；/为浮点数除法
Area_y = (2, Screen_Height // Size -1)
# 食物的初步设置
# 食物的分值+颜色
Food_Style_List = [(10, (255,100,100)), (20, (100,255,100)), (30, (100,100,255))]
# 整体颜色设置
Light = (100,100,100)
Dark = (200,200,200)
Black = (0,0,0)
Red = (200,30,30)
Back_Ground = (40,40,60)
# 文本输出格式设置
def Print_Txt(screen, font, x, y, text, fcolor=(255,255,255)):
# font.render参数意义：.render（内容，是否抗锯齿，字体颜色，字体背景颜色）
Text = font.render(text,True, fcolor)
screen.blit(Text, (x, y))
# 初始化蛇
def init_snake():
snake = deque()
snake.append((2, Area_y[0]))
snake.append((1, Area_y[0]))
snake.append((0, Area_y[0]))
return snake
# 食物设置
# 注意需要对食物出现在蛇身上的情况进行判断
def Creat_Food(snake):
'''
注：randint 产生的随机数区间是包含左右极限的，
也就是说左右都是闭区间的[1, n]，能取到1和n。
而 randrange 产生的随机数区间只包含左极限，
也就是左闭右开的[1, n)，1能取到，而n取不到。randint
产生的随机数是在指定的某个区间内的一个值，
而 randrange 产生的随机数可以设定一个步长，也就是一个间隔。'''
food_x = random.randint(Area_x[0], Area_x[1])# 此处有疑问
food_y = random.randint(Area_y[0], Area_y[1])
# 如果食物出现在蛇上，重来；
while (food_x, food_y)in snake:
food_x = random.randint(Area_x[0], Area_x[1])
food_y = random.randint(Area_y[0], Area_y[1])
return food_x, food_y
# 食物风格
def Food_Style():
return Food_Style_List[random.randint(0,2)]# 返回随机的分值和颜色
def snake_main(windowname='贪吃蛇', overname='GAME OVER'):
pygame.init()
screen = pygame.display.set_mode((Screen_Width, Screen_Height))# 初始化一个准备显示的窗口或屏幕
pygame.display.set_caption(windowname)# 设置窗口名字
# 得分字体设置
font1 = pygame.font.SysFont('SimHei',24)
# GO字体设置
font2 = pygame.font.SysFont(None,72)
fwidth, fheight = font2.size(overname)###
# 程序bug修复：如果蛇在向右移动，快速点击分别施加向下、向左的命令，向下的命令会被覆盖，只有向左的命令被接受，直接GameOver
# b变量为了防止这个情况发生
b =True
# 蛇
snake = init_snake()
# 食物
food = Creat_Food(snake)
food_style = Food_Style()
# 方向控制
pos = (1,0)###
# 启动游戏相关变量初始化
game_over =True # 结束标志 # 是否开始，当start = True，game_over = True 时，才显示GAME OVER
game_start =False # 开始标志
score =0 # 得分
orispeed =0.3 # 蛇初始速度
speed = orispeed# 蛇速度
last_move_time =None
pause =False # 暂停
while True:
for eventin pygame.event.get():
if event.type == QUIT:
sys.exit()
elif event.type == KEYDOWN:
if event.key == K_RETURN:
if game_over:
game_start =True
game_over =False
b =True
snake = init_snake()
food = Creat_Food(snake)
food_style = Food_Style()
pos = (1,0)
# 得分
score =0
last_move_time = time.time()
elif event.key == K_SPACE:
if not game_over:
pause =not pause
# 以下为防止蛇在向右移动时按向左键，导致GameOver
elif event.keyin (K_UP, K_w):
if band not pos[1]:###
pos = (0, -1)
b =False
elif event.keyin (K_DOWN, K_s):
if band not pos[1]:
pos = (0,1)
b =False
elif event.keyin (K_LEFT, K_a):
if band not pos[0]:
pos = (-1,0)
b =False
elif event.keyin (K_RIGHT, K_d):
if band not pos[0]:
pos = (1,0)
b =False
# 填充背景色
screen.fill(Back_Ground)
###
# 画网格线、竖线
for xin range(Size, Screen_Width, Size):
pygame.draw.line(screen, Black, (x, Area_y[0] * Size), (x, Screen_Height), Line_Width)
# 画网格线、横线
for yin range(Area_y[0] * Size, Screen_Height, Size):
pygame.draw.line(screen, Black, (0, y), (Screen_Width, y), Line_Width)
# 蛇的爬行过程
if not game_over:
curTime = time.time()
if curTime - last_move_time > speed:###
if not pause:
b =True
last_move_time = curTime
next_s = (snake[0][0] + pos[0], snake[0][1] + pos[1])
# 如果吃到了食物
if next_s == food:
snake.appendleft(next_s)
score += food_style[0]
speed = orispeed -0.03 * (score //100)
food = Creat_Food(snake)
food_style = Food_Style()
else:
# 在区域内
if Area_x[0] <= next_s[0] <= Area_x[1]and Area_y[0] <= next_s[1] <= Area_y[
1]and next_snot in snake:
snake.appendleft(next_s)
snake.pop()
else:
game_over =True
# 画食物
if not game_over:
'''
rect(Surface,color,Rect,width=0)
第一个参数指定矩形绘制到哪个Surface对象上
第二个参数指定颜色
第三个参数指定矩形的范围（left，top，width，height）
第四个参数指定矩形边框的大小（0表示填充矩形）
例如绘制三个矩形：pygame.draw.rect(screen, BLACK, (50, 50, 150, 50), 0)
pygame.draw.rect(screen, BLACK, (250, 50, 150, 50), 1)
pygame.draw.rect(screen, BLACK, (450, 50, 150, 50), 10)
'''
# 避免 GAME OVER 的时候把 GAME OVER 的字给遮住了
pygame.draw.rect(screen, food_style[1], (food[0] * Size, food[1] * Size, Size, Size),0)
# 画蛇
for sin snake:
pygame.draw.rect(screen, Dark, (s[0] * Size + Line_Width, s[1] * Size + Line_Width,
Size - Line_Width *2, Size - Line_Width *2),0)
Print_Txt(screen, font1,30,7,f'速度: {score //100}')
Print_Txt(screen, font1,450,7,f'得分: {score}')
# 画GameOver
if game_over:
if game_start:
# print('GameOver')
Print_Txt(screen, font2, (Screen_Width - fwidth) //2, (Screen_Height - fheight) //2,'GAME OVER', Red)
pygame.display.update()
`
