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最新推荐文章于 2025-01-05 20:40:51 发布

转载最新推荐文章于 2025-01-05 20:40:51 发布 · 502 阅读

    <!DOCTYPE html>  
    <html>  
    <body>  
    <canvas id="myCanvas" width="240" height="240" style="border:1px solid #d3d3d3;">Your browser does not support the HTML5 canvas tag.</canvas>  
    <script>  
    var ctx=document.getElementById("myCanvas").getContext("2d"),r = [{x:10,y:9},{x:10,y:8}],co=40,e=null;  
    ctx.shadowBlur=20,ctx.shadowColor="black";  
    setInterval(function(){  
    if(check(r[0],0) || r[0].x < 0 || r[0].x >= 24 || r[0].y < 0 || r[0].y >= 24)return;  
    e!=null&&((co==40&&r[0].x==e.x&&r[0].y+1==e.y)||(co==38&&r[0].x==e.x&&r[0].y-1==e.y)||(co==37&&r[0].x-1==e.x&&r[0].y==e.y)||(co==39&&r[0].x+1==e.x&&r[0].y==e.y))?(r.unshift(e),e=null,r.unshift(r.pop())):(r.unshift(r.pop()));  
    (co==40 || co==38)?(r[0].x=r[1].x,r[0].y=r[1].y+(co==40?1:-1)):(r[0].x=r[1].x+(co==39?1:-1),r[0].y=r[1].y);  
    ctx.clearRect(0,0,240,240);  
    if(e)ctx.fillRect(e.x*10,e.y*10,10,10);  
    for(var i=0;i<r.length;i++)ctx.fillRect(r[i].x*10,r[i].y*10,10,10);  
    while(e==null || check(e))e={y:(Math.random()*24 >>>0),x:(Math.random()*24 >>>0)};  
    if(check(r[0],0) || r[0].x < 0 || r[0].x >= 24 || r[0].y < 0 || r[0].y >= 24)alert("game over\nYou get ["+(r.length-2)+"]");  
    },100);  
    document.onkeyup = function(event){co=event.keyCode>=37 && event.keyCode<=40 && (Math.abs(event.keyCode-co) != 2)?event.keyCode:co;}  
    function check(e,j){  
    for(var i=0;i<r.length;i++)if(j!=i && r[i].x==e.x && r[i].y==e.y)return true;  
    return false;  
    }  
    </script>  
    </body>  
    </html>