贪食蛇-JS小游戏

2024-09-05 12:21:03

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贪食蛇-JS小游戏，操作键为键盘←↑→↓；没支持ASWD键，按了也没用哦。
　　开始按钮开始暂停按钮暂停，重新开始就刷页面吧。
　　怎么？Game Over了？那就刷新页面重新开始吧！
　　分4个级别的速度：100分，200分，300分，400分以上
　　长按方向键能起到加速的作用
　　最后注明：没有做食物不能出现在蛇身体的判断，我觉得出现在蛇身体上也正常哦。

<!DOCTYPE html><html><head>    <meta http-equiv="Content-Type" content="text/html; charset=utf-8">    <title>贪食蛇</title>    <style>        body{ font: 12px/25px "宋体";}        #snake{ width: 500px; height: 500px; border: 2px #333 solid; background: green; position: relative; float: left;}        .u_bd strong{ font:30px/18px "Georgia"; color: #ff3300;}        .food{ width: 10px;height: 10px; background: red; position: absolute;z-index: 99;}        .node{ width: 10px;height: 10px; background: white; position: absolute;}        .fl{ float: left; width: 400px;}        .games{ overflow: hidden; width: 500px;}        .u_bd{ list-style-type: none; margin: 0;}        h1,h2{ margin: 0;padding: 0; font-size: 14px;text-align: center;}        .u_bd li{ float: left; margin-right: 10px; height: 30px; line-height: 30px;}        input[type='button']{ border: none; background: #006699;color: #ffffff;}    </style></head><body><div class="fl">    <h1>贪吃蛇</h1>    <ul>        <li>操作键为键盘←↑→↓；没支持ASWD键，按了也没用哦。</li>        <li>开始按钮开始暂停按钮暂停，重新开始就刷页面吧。</li>        <li>怎么？Game Over了？那就刷新页面重新开始吧！</li>        <li>分4个级别的速度：100分，200分，300分，400分以上</li>        <li>长按方向键能起到加速的作用</li>        <li>最后注明：没有做食物不能出现在蛇身体的判断，我觉得出现在蛇身体上也正常啊。</li>    </ul></div><div class="games">    <ul class="u_bd">        <li>得分：<strong id="points">100</strong>分</li>        <li><input type="button" value="开始游戏" id="star" /></li>        <li><input type="button" value="暂停游戏" id="stop" /></li>        <li>速度：<strong id="speed">500</strong></li>    </ul></div><div id="snake"></div><script type="text/javascript">     var wyf={        byID:function(id){            if(typeof id !="string"){                return id;            }            else{                return document.getElementById(id);            }        },        byClass:function(oclass,oparent){            var element=(oparent||document).getElementsByTagName("*");            var result=[];            for(var i=0,lenght=element.length;i<lenght;i++)            {                if(element[i].className==oclass)                {                    result.push(element[i]);                }            }            return result;        },        //事件绑定        addHandler:function(element,type,fn){            if(element.addEventListener)            {                element.addEventListener(type,fn,false);            }else if(element.attachEvent){                element.attachEvent("on"+type,fn);            }else{                element["on"+type]=fn;            }        },        //兼容event        getEvent:function(event){            return event ? event : window.event;        },        //当前指向目标（兼容）        getTarget:function(event){            return event.target||event.srcElement;        },        random:function(min,max){            var rmax=max-min;            return Math.floor(Math.random()*rmax+min);        },        //赋dom坐标        domLeftTop:function(dom,colNum,rowNum){            dom.style.left=colNum*10+"px";            dom.style.top=rowNum*10+"px";        },        //画蛇的节点        drowNode:function(box,node,type){            var temp=document.createElement("div");            temp.className=type;            this.domLeftTop(temp,node.getCol(),node.getRow());            if(type=="food")            {                temp.setAttribute("row",node.getRow());                temp.setAttribute("col",node.getCol());            }            box.appendChild(temp);        },        //画蛇        drowSnake:function(snake,box){            var oldnode=this.byClass("node",box);            if(oldnode.length>0)            {                for(var i=0,len=oldnode.length;i<len;i++)                {                    box.removeChild(oldnode[i]);                }            }            var newnode=snake.getHead();            do{                this.drowNode(box,newnode,"node");                newnode=newnode.getNextNode();            }while(newnode!=null)        },        //创建食物        createFood:function(box){            var food=this.byClass("food",box);            if(food.length>0)            {                for(var i=0,len=food.length;i<len;i++)                {                    box.removeChild(food[i]);                }            }            var row=this.random(0,49),col=this.random(0,49);            var node=new Node(row,col);            this.drowNode(box,node,"food");        },        //初始化        init:function(box){            this.createFood(box);            var snake=new Snake();            for(var i=5;i>0;i--)            {                var node=new Node(i-1,0);                snake.addNode(node);            }            this.drowSnake(snake,box);            this.showPoints(snake,this.byID("points"));            return snake;        },        //得分        showPoints:function(snake,box){            var len=snake.length()-5;            box.innerHTML=len*10;        },        //移动        move:function(snake,food){            if(snake.getStatus()=="dead"){                alert("Game Over");                clearInterval(time);                time=null;            }            //判方向有效性            while(snake.getOperate().length!=0)            {                //取操作队列的第一个                var op=snake.getOperate().shift();                if(op!=snake.getDirection()){                    var dir=snake.getDirection();                    if(op=="up"&&dir=="down"){continue;}                    if(op=="down"&&dir=="up"){continue;}                    if(op=="left"&&dir=="right"){continue;}                    if(op=="right"&&dir=="left"){continue;}                    snake.setDirection(op);                    break;                }            }            var row=0;            var col=0;            switch(snake.getDirection())            {                case "up":row--;                    break;                case "down":row++;                    break;                case "left":col--;                    break;                case "right":col++;                    break;            }            var head=snake.getHead();            if(food.length>0)            {                if((head.getRow()+row)==food[0].getAttribute("row")&&(head.getCol()+col)==food[0].getAttribute("col"))                {                    var headnode=new Node(head.getRow()+row,head.getCol()+col);                    snake.eat(headnode);                    this.createFood(this.byID("snake"));                    this.showPoints(snake,this.byID("points"));                    snake.setSpeed();                }                else{                    var node=snake.getEnd();                    do{                        if(node.getPrevNode()==null)                        {                            break;                        }                        node.setRow(node.getPrevNode().getRow());                        node.setCol(node.getPrevNode().getCol());                        node=node.getPrevNode();                    }while(node!=null);                    head.setRow(head.getRow()+row);                    head.setCol(head.getCol()+col);                }                var headrow=head.getRow();                var headcol=head.getCol();                if(headrow>49||headrow<0||headcol>49||headcol<0)                {                    snake.setStatus("dead");                    return;                }                var temp=head.getNextNode().getNextNode();                do{                    if(temp.getRow()==headrow&&temp.getCol()==headcol)                    {                        snake.setStatus("dead");                        return;                    }                    temp=temp.getNextNode();                }while(temp!=null);                this.drowSnake(snake,this.byID("snake"));            }        }    };    //蛇对象    function Snake(){        this.direction = "down";        this.operate = [];        this.head = null;        this.end = null;        this.status = "live";        this.speed=500;    }    Snake.prototype={        //状态操作        getStatus:function(){            return this.status;        },        setStatus:function(state){            this.status=state;        },        //当前运动方向        getDirection:function(){            return this.direction;        },        setDirection:function(dir){            this.direction=dir;        },        //用户操作方向        getOperate:function(){            return this.operate;        },        addOperate:function(ops){            this.operate.push(ops);        },        //头尾节点操作        getHead:function(){            return this.head;        },        setHead:function(node){            this.head=node;        },        getEnd:function(){            return this.end;        },        setEnd:function(node){            this.end=node;        },        //添加节点        addNode:function(node){            if(this.head==null)            {                this.head=node;            }else{                node.setPrevNode(this.end);                this.end.setNextNode(node);            }            this.end=node;        },        //蛇长度        length:function(){            var len=1;            var node=this.head.getNextNode();            while(node!=null)            {                len++;                node=node.getNextNode();            }            return len;        },        //吃东西        eat:function(node){            node.setNextNode(this.head);            this.head.setPrevNode(node);            this.head=node;        },        //移动速度        setSpeed:function(){            if(arguments[0])            {                this.speed=arguments[0];            }else{                var len=this.length()-5;                if(len>0)                {                    switch(true)                    {                        case len<10:this.speed=500;                            break;                        case len>=10&&len<20:this.speed=400;                            break;                        case len>=20&&len<30:this.speed=300;                            break;                        case len>=30&&len<40:this.speed=200;                            break;                        default:this.speed=100;                                break;                    }                }else{                    this.speed=500;                }            }        },        getSpeed:function(){            return this.speed;        }    };    //组成蛇的节点对象    function Node(rowNum,colNum){        //当前节点所必须的属性        this.row = rowNum;        this.col = colNum;         this.prevNode = null;        this.nextNode = null;    }    Node.prototype={        //行操作        getRow:function(){            return this.row;        },        setRow:function(rowNum){            this.row=rowNum;        },        //列操作        getCol:function(){            return this.col;        },        setCol:function(colNum){            this.col=colNum;        },        //下个节点操作和上个节点操作        getNextNode:function(){            return this.nextNode;        },        getPrevNode:function(){            return this.prevNode;        },        setNextNode:function(node)        {            this.nextNode=node;        },        setPrevNode:function(node){            this.prevNode=node;        },        //判断是不是头或者尾        isHead:function(){            return this.prevNode==null?true:false;        },        isEnd:function(){            return this.nextNode==null?true:false;        }    };    wyf.addHandler(window,"load",function(){        var box=wyf.byID("snake");        var snake=wyf.init(box);        window.time=null;        wyf.addHandler(document,"click",function(e){            var e=wyf.getEvent(e);            var target=wyf.getTarget(e);            switch(target.id)            {                case "star":gameStar();                    break;                case "stop":gameStop();                    break;            }        });        function gameStop(){            if(time)            {                clearInterval(time);                time=null;            }        }        function gameStar(){            if(!time)            {                time=setInterval(function(){                    wyf.move(snake,wyf.byClass("food",box))                },snake.getSpeed());            }        }        wyf.addHandler(document,"keydown",function(e){            if(time)            {                var op="";                var event=wyf.getEvent(e);                switch(event.keyCode)                {                    case 37:op="left";                        break;                    case 38:op="up";                        break;                    case 39:op="right";                        break;                    case 40:op="down";                        break;                }                if(op!="")                {                    snake.addOperate(op);                    quickSpeed(true);                }            }        });        wyf.addHandler(document,"keyup",function(e){            if(time)            {                var eventkey=wyf.getEvent(e).keyCode;                if(eventkey==37||eventkey==38||eventkey==39||eventkey==40)                {                    quickSpeed(false);                }            }        });        function quickSpeed(clicking){            var speed=snake.getSpeed();            if(clicking)            {                snake.setSpeed(100);                console.log(snake.getSpeed());            }else{                snake.setSpeed();                console.log(snake.getSpeed());            }            wyf.byID("speed").innerHTML=snake.getSpeed();            if(speed!=snake.getSpeed())            {                gameStop();                gameStar();            }        }    });</script></body></html>

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