** 说明: ** 贪吃蛇, tkinter找不到文档, 勉强写一个界面

思路

二维界面 一位数组

(0, 0) (1, 0) (2, 0) 0 1 2

(0, 1) (1, 1) (2, 1) 3 4 5

(0, 2) (1, 2) (2, 2) 6 7 8

将界面转为一位数组, 那么地图可以这么定义

map = range(9)

x坐标的长度, 或者界面宽度

width = 3

y坐标的长度, 界面长度

height = 3

坐标为(1,1)的点:

pos = 4

求坐标

x = pos % width

y = pos // width

方向的值

up = -w

down = w

right = 1

left = -1

移动

pos = pos + left # 左移

pos = pos + up # 上移

pos = pos + down # 下移

pos = pos + right # 右移

判断碰撞边界

pos + direction < 0 or pos + direction >= width * height #上下方向

pos % width + direction == -1 or pos % width + direction == width * height # 左右方向

吃豆子

bean == pos + direction

代码(python3):

import tkinter

import random

import time

class Game(object):

"""docstring for Game"""

w, h, length, unit = 50, 50, 2500, 10

over = pause = False

gmap = bean = snake = canvas_after_id = None

direction = -1

pause_text, restart_text = 'pause', 'restart'

bg, snake_bg, bean_bg = 'white', 'purple', 'green'

duration = 400

def __init__(self):

super(Game, self).__init__()

root = tkinter.Tk()

self.keys = {'a': -1, 'w': -self.w, 's': self.w, 'd': 1}

self.pause_btn = tkinter.Button(root, text=self.pause_text, command=self.game_pause)

self.restart_btn = tkinter.Button(root, text=self.restart_text, command=self.start)

self.pause_btn.grid(row=0, column=0)

self.restart_btn.grid(row=0, column=1)

self.c = tkinter.Canvas(root, width=self.w * self.unit, height=self.h * self.unit, bg=self.bg)

self.c.grid(row=1, columnspan=10)

self.c.bind_all("", self.set_direction)

self.start()

tkinter.mainloop()

def run(self):

if self.over:

return

if self.pause:

self.c.after_cancel(self.canvas_after_id)

return

self.crawl()

self.canvas_after_id = self.c.after(self.duration, self.run)

def crawl(self):

pos = self.snake[0] + self.direction

if pos in self.snake or pos < 0 or pos >= self.length or (self.snake[0] % self.w + self.direction) in [-1, self.w]:

self.over = True

print('game over')

return

self.snake.insert(0, pos)

if pos == self.bean:

self.new_bean()

else:

tail = self.snake.pop()

self.draw(tail, self.bg)

self.draw(pos, self.snake_bg)

def game_pause(self):

self.pause = not self.pause

self.pause_text = 'continue' if self.pause else 'pause'

self.pause_btn.config(text=self.pause_text)

if not self.pause:

self.run()

def set_direction(self, e):

arrow = self.keys.get(e.char)

self.direction = self.direction if not arrow or -self.direction == arrow else arrow

def start(self):

self.reset()

self.run()

def reset(self):

t1 = time.time()

self.over = self.pause = False

self.c.delete("all")

self.gmap = {i: self.create_rectangle(i, self.bg) for i in range(self.length)}

self.new_snake()

self.new_bean()

def new_snake(self):

self.snake = [self.w * (self.h + 1) // 2, self.w * (self.h + 1 ) // 2 + 1]

self.direction = -1

for i in self.snake:

self.draw(i, self.snake_bg)

def new_bean(self):

self.bean = None

while not self.bean or self.bean in self.snake:

self.bean = random.randint(0, self.length - 1)

self.draw(self.bean, self.bean_bg)

def draw(self, pos, color):

if self.gmap[pos]:

self.c.itemconfig(self.gmap[pos], fill=color)

def create_rectangle(self, pos, color):

x1 = pos % self.w * self.unit

y1 = pos // self.w * self.unit

x2 = x1 + self.unit -1

y2 = y1 + self.unit -1

return self.c.create_rectangle(x1, y1, x2, y2, fill=color, outline=self.bg)

Game()