贪吃蛇（Python版）

import pygame

import sys

import random

# 全局定义

SCREEN_X = 600

SCREEN_Y = 600

# 蛇类

# 点以25为单位

class Snake(object):

# 初始化各种需要的属性 [开始时默认向右/身体块x5]

def __init__(self):

self.dirction = pygame.K_RIGHT

self.body = []

for x in range(5):

self.addnode()

# 无论何时 都在前端增加蛇块

def addnode(self):

left,top = (0,0)

if self.body:

left,top = (self.body[0].left,self.body[0].top)

node = pygame.Rect(left,top,25,25)

if self.dirction == pygame.K_LEFT:

node.left -= 25

elif self.dirction == pygame.K_RIGHT:

node.left += 25

elif self.dirction == pygame.K_UP:

node.top -= 25

elif self.dirction == pygame.K_DOWN:

node.top += 25

self.body.insert(0,node)

# 删除最后一个块

def delnode(self):

self.body.pop()

# 死亡判断

def isdead(self):

# 撞墙

if self.body[0].x not in range(SCREEN_X):

return True

if self.body[0].y not in range(SCREEN_Y):

return True

# 撞自己

if self.body[0] in self.body[1:]:

return True

return False

# 移动！

def move(self):

self.addnode()

self.delnode()

# 改变方向 但是左右、上下不能被逆向改变

def changedirection(self,curkey):

LR = [pygame.K_LEFT,pygame.K_RIGHT]

UD = [pygame.K_UP,pygame.K_DOWN]

if curkey in LR+UD:

if (curkey in LR) and (self.dirction in LR):

return

if (curkey in UD) and (self.dirction in UD):

return

self.dirction = curkey

# 食物类

# 方法： 放置/移除

# 点以25为单位

class Food:

def __init__(self):

self.rect = pygame.Rect(-25,0,25,25)

def remove(self):

self.rect.x=-25

def set(self):

if self.rect.x == -25:

allpos = []

# 不靠墙太近 25 ~ SCREEN_X-25 之间

for pos in range(25,SCREEN_X-25,25):

allpos.append(pos)

self.rect.left = random.choice(allpos)

self.rect.top = random.choice(allpos)

print(self.rect)

def show_text(screen, pos, text, color, font_bold = False, font_size = 60, font_italic = False):

#获取系统字体，并设置文字大小

cur_font = pygame.font.SysFont("宋体", font_size)

#设置是否加粗属性

cur_font.set_bold(font_bold)

#设置是否斜体属性

cur_font.set_italic(font_italic)

#设置文字内容

text_fmt = cur_font.render(text, 1, color)

#绘制文字

screen.blit(text_fmt, pos)

def main():

pygame.init()

screen_size = (SCREEN_X,SCREEN_Y)

screen = pygame.display.set_mode(screen_size)

pygame.display.set_caption('Snake')

clock = pygame.time.Clock()

scores = 0

isdead = False

# 蛇/食物

snake = Snake()

food = Food()

while True:

for event in pygame.event.get():

if event.type == pygame.QUIT:

sys.exit()

if event.type == pygame.KEYDOWN:

snake.changedirection(event.key)

# 死后按space重新

if event.key == pygame.K_SPACE and isdead:

return main()

screen.fill((255,255,255))

# 画蛇身 / 每一步+1分

if not isdead:

scores+=1

snake.move()

for rect in snake.body:

pygame.draw.rect(screen,(20,220,39),rect,0)

# 显示死亡文字

isdead = snake.isdead()

if isdead:

show_text(screen,(100,200),'YOU DEAD!',(227,29,18),False,100)

show_text(screen,(150,260),'press space to try again...',(0,0,22),False,30)

# 食物处理 / 吃到+50分

# 当食物rect与蛇头重合,吃掉 -> Snake增加一个Node

if food.rect == snake.body[0]:

scores+=50

food.remove()

snake.addnode()

# 食物投递

food.set()

pygame.draw.rect(screen,(136,0,21),food.rect,0)

# 显示分数文字

show_text(screen,(50,500),'Scores: '+str(scores),(223,223,223))

pygame.display.update()

clock.tick(10)

if __name__ == '__main__':

main()