javascript,贪吃蛇javascript实现简单的贪吃蛇游戏，功能很简单，代码也很实用，就不多废话了，小伙伴们参考注释吧。 <html><head> <meta http-equiv='content-type' content='text/html;charset=utf-8'><title>贪吃蛇</title><script type="text/javascript"> var map; //地图 var snake; //蛇 var food; //食物 var timer; //定时器 var initSpeed=200; //初始定时器时间间隔（毫秒）,间接代表蛇移动速度 var nowSpeed=initSpeed; //游戏进行时蛇移动速度 var grade=0; //积分 var flag=1; //（可间接看做）关卡 //地图类 function Map(){ this.width=800; this.height=400; this.position='absolute'; this.color='#EEEEEE'; this._map=null; //生成地图 this.show=function(){ this._map=document.createElement('div'); this._map.style.width=this.width+'px'; this._map.style.height=this.height+'px'; this._map.style.position=this.position; this._map.style.backgroundColor=this.color; document.getElementsByTagName('body')[0].appendChild(this._map); } } //食物类 function Food(){ this.width=20; this.height=20; this.position='absolute'; this.color='#00FF00'; this.x=0; this.y=0; this._food; //生成食物 this.show=function(){ this._food=document.createElement('div'); this._food.style.width=this.width+'px'; this._food.style.height=this.height+'px'; this._food.style.position=this.position; this._food.style.backgroundColor=this.color; this.x=Math.floor(Math.random()*map.width/this.width); this.y=Math.floor(Math.random()*map.height/this.width); this._food.style.left=this.x*this.width; this._food.style.top=this.y*this.height; map._map.appendChild(this._food); } } //蛇类 function Snake(){ this.width=20; this.height=20; this.position='absolute'; this.direct=null;//移动方向 //初始蛇身 this.body=new Array( [3,2,'red',null],//蛇头 [2,2,'blue',null], [1,2,'blue',null] ); //生成蛇身 this.show=function(){ for(var i=0;i<this.body.length;i++){ if(this.body[i][3]==null){ this.body[i][3]=document.createElement('div'); this.body[i][3].style.width=this.width; this.body[i][3].style.height=this.height; this.body[i][3].style.position=this.position; this.body[i][3].style.backgroundColor=this.body[i][2]; map._map.appendChild(this.body[i][3]); } this.body[i][3].style.left=this.body[i][0]*this.width+'px'; this.body[i][3].style.top=this.body[i][1]*this.height+'px'; } } //控制蛇移动 this.move=function(){ var length=this.body.length-1; for(var i=length;i>0;i--){ this.body[i][0]=this.body[i-1][0]; this.body[i][1]=this.body[i-1][1]; } switch(this.direct){ case 'right': this.body[0][0]=this.body[0][0]+1; break; case 'left': this.body[0][0]=this.body[0][0]-1; break; case 'up': this.body[0][1]=this.body[0][1]-1; break; case 'down': this.body[0][1]=this.body[0][1]+1; break; } this.condition(); this.show(); } //定时器，开始游戏时，调用 this.speed=function(){ timer=setInterval('snake.move()',initSpeed); } //条件处理 this.condition=function(){ //吃食物 if(this.body[0][0]==food.x&&this.body[0][1]==food.y){ grade++; this.body[[this.body.length]]=[0,0,'blue',null]; map._map.removeChild(food._food) food.show(); } //判断是否撞墙 if(this.body[0][0]<0||this.body[0][0]>=map.width/this.width||this.body[0][1]<0||this.body[0][1]>=map.height/this.height){ alert('game over'); clearInterval(timer); return ; } //判断是否撞到自身 for(var i=1;i<this.body.length;i++){ if(this.body[0][0]==this.body[i][0]&&this.body[0][1]==this.body[i][1]){ alert('game over'); clearInterval(timer); return ; } } //速度提升处理，积分每曾2分，速度提升一倍 if(grade/2==flag){ clearInterval(timer); flag++; nowSpeed=initSpeed/flag; timer=setInterval('snake.move()',nowSpeed); } document.title='贪吃蛇 积分'+grade+' 速度等级'+initSpeed/nowSpeed; } } document.onkeydown=function(event){ //按下任意键，开始游戏 if(snake.direct===null){ snake.direct='right'; snake.speed(); } //控制方向，W S D A分别代表 上下右左 switch(window.event?window.event.keyCode:event.keyCode){//浏览器兼容处理 case 87 : snake.direct=snake.body[0][0]==snake.body[1][0]?snake.direct:'up';//避免反向移动，触发死亡bug break; case 83 : snake.direct=snake.body[0][0]==snake.body[1][0]?snake.direct:'down'; break; case 68 : snake.direct=snake.body[0][1]==snake.body[1][1]?snake.direct:'right'; break; case 65 : snake.direct=snake.body[0][1]==snake.body[1][1]?snake.direct:'left'; break; } } //自动加载游戏 window.onload=function(){ map=new Map(); map.show(); food=new Food(); food.show(); snake=new Snake(); snake.show(); }</script></head><body></body></html>以上所述就是本文的全部内容了，希望大家能够喜欢。
javascript,贪吃蛇
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