python3 80行代碼實現貪吃蛇

上面是實現的截圖,廢話不說,直接開始說一下代碼

pos = {
    'UP': (-1,0),
    'DOWN':(+1,0),
    'LEFT':(0,-1),
    'RIGHT':(0,+1),
}
current = 'RIGHT'
snake = [[1,1],[1,2],[1,3],[1,4],[1,5]]   #ex: [[1,1],[1,2],[1,3]]  [y,x]
head = snake[-1]
snake_speed = 0.1
rany, ranx = -1, -1

來一些數據的初始化,蛇用列表表示,蛇的頭的是列表的最后一項,速度用time.sleep()表示,速度越小,越快

def isover(head):
    if snake.count(head) > 1:  #碰到自己身體
        return True
    if (head[0] == y-1) or (head[1] == x-1) or (head[0] == 0) or (head[1] == 0):    #碰到牆
        return True
    return False

判定游戲是否結束,碰到自己身體結束或者碰到牆結束

def randomyx():
    ranflag = False
    while ranflag is False:
        rany, ranx = random.randint(1,y-2) , random.randint(1,x-2)
        if [rany,ranx] not in snake:
            ranflag = True

隨機生成貪吃蛇的點,注意:生成的點:需在框內而且不能在蛇的身上

    while isover(head) is False:
        draw()
        head = [ head[0] + pos[current][0] , head[1] + pos[current][1]] 
        snake.append(head)
        if head[0] == rany and head[1] == ranx:
            randomyx()
            snake_speed = snake_speed - 0.01
        else:
            snake.pop(0)
        time.sleep(snake_speed)

上面是核心的邏輯代碼,主要思想是:

1.只要蛇沒有吃到東西,就頭加入進去,尾掉(形成蛇走步的感覺);只要蛇吃到了東西,就頭加進來,尾不出去(形成蛇長大的感覺)  <---  典型隊列

2.然后考慮current <-- 當前蛇走的方向,如何去改變

這里首先就考慮是一個異步的情形!利用異步監聽鼠標時間!

    t1 = threading.Thread(target=listening, args=(head,), name='listenkeyboard')
    t1.start()

def listening(head):
    while True:
        c = stdscr.getch()
        if c == curses.KEY_UP and current != 'DOWN':
            current = 'UP'
        elif c == curses.KEY_DOWN and current != 'UP':
            current = 'DOWN'
        elif c == curses.KEY_LEFT and current != 'RIGHT':
            current = 'LEFT'
        elif c == curses.KEY_RIGHT and current != 'LEFT':
            current = 'RIGHT'

這里需要注意的是:    在當前方向為上的時候,不能按下--->  按了蛇不就自己撞自己了嘛~

寫完主要邏輯,之后  美化以下界面->

curses.start_color()  #開啟顏色
curses.init_pair(1, curses.COLOR_RED, curses.COLOR_RED)#定義點的顏色
curses.init_pair(2, curses.COLOR_BLUE, curses.COLOR_BLUE) #定義蛇的顏色

for si in snake:
　　stdscr.addstr(si[0],si[1],'@',curses.color_pair(2))
　　stdscr.addstr(rany,ranx,' ',curses.color_pair(1))

這樣,一個貪吃蛇小游戲就完成了,下面是實現的全部代碼,python3 snake.py,自己玩一下吧~~

import time,curses,random,threading

pos = {
    'UP': (-1,0),
    'DOWN':(+1,0),
    'LEFT':(0,-1),
    'RIGHT':(0,+1),
}
current = 'RIGHT'
snake = [[1,1],[1,2],[1,3],[1,4],[1,5]]   #ex: [[1,1],[1,2],[1,3]]  [y,x]
head = snake[-1]
snake_speed = 0.1
rany, ranx = -1, -1

def isover(head):
    if snake.count(head) > 1:  #碰到自己身體
        return True
    if (head[0] == y-1) or (head[1] == x-1) or (head[0] == 0) or (head[1] == 0):    #碰到牆
        return True
    return False

def randomyx():
    global rany,ranx
    ranflag = False
    while ranflag is False:
        rany, ranx = random.randint(1,y-2) , random.randint(1,x-2)
        if [rany,ranx] not in snake:
            ranflag = True

def draw():
    stdscr.erase()
    stdscr.border()
    for si in snake:
        stdscr.addstr(si[0],si[1],'@',curses.color_pair(2))
    stdscr.addstr(rany,ranx,' ',curses.color_pair(1))
    stdscr.refresh()

def listening(head):
    global current
    while True:
        c = stdscr.getch()
        if c == curses.KEY_UP and current != 'DOWN':
            current = 'UP'
        elif c == curses.KEY_DOWN and current != 'UP':
            current = 'DOWN'
        elif c == curses.KEY_LEFT and current != 'RIGHT':
            current = 'LEFT'
        elif c == curses.KEY_RIGHT and current != 'LEFT':
            current = 'RIGHT'

def loop(stdscr):
    global head,snake_speed
    randomyx()    
    t1 = threading.Thread(target=listening, args=(head,), name='listenkeyboard')
    t1.start()
    while isover(head) is False:
        draw()
        head = [ head[0] + pos[current][0] , head[1] + pos[current][1]] 
        snake.append(head)
        if head[0] == rany and head[1] == ranx:
            randomyx()
            snake_speed = snake_speed - 0.01
        else:
            snake.pop(0)
        time.sleep(snake_speed)

stdscr = curses.initscr()
curses.noecho()     #不輸出- -
curses.cbreak()     #立刻讀取:暫不清楚- -
curses.start_color()  #開啟顏色
curses.init_pair(1, curses.COLOR_RED, curses.COLOR_RED)#定義點的顏色
curses.init_pair(2, curses.COLOR_BLUE, curses.COLOR_BLUE) #定義蛇的顏色
#init_pair(n,f,b)修改顏色對n，讓f為前景色，b為背景色。顏色對0天生的黑白色，不允許改。
stdscr.keypad(1)    #開啟keypad
stdscr.border()
curses.curs_set(0)
(y,x) = stdscr.getmaxyx()
curses.wrapper(loop)
curses.endwin()