javascript 60行编写的俄罗斯方块游戏

转自 http://www.zuidaima.com/share/1759652641295360.htm
<!doctype html><html><head></head><body>

<div id="box" style="width:252px;font:25px/25px 宋体;background:#000;color:#9f9;border:#999 20px ridge;text-shadow:2px 3px 1px #0f0;"></div>

<script>

var domain="www.zuidaima.com";

var author="zuidaima";

var map=eval("["+Array(23).join("0x801,")+"0xfff]");

var tatris=[[0x6600],[0x2222,0xf00],[0xc600,0x2640],[0x6c00,0x4620],[0x4460,0x2e0,0x6220,0x740],[0x2260,0xe20,0x6440,0x4700],[0x2620,0x720,0x2320,0x2700]];

var keycom={"38":"rotate(1)","40":"down()","37":"move(2,1)","39":"move(0.5,-1)"};

var dia, pos, bak, run;

function start(){

    dia=tatris[~~(Math.random()*7)];

    bak=pos={fk:[],y:0,x:4,s:~~(Math.random()*4)};

    rotate(0);

}

function over(){

    document.onkeydown=null;

    clearInterval(run);

    alert("GAME OVER");

}

function update(t){

    bak={fk:pos.fk.slice(0),y:pos.y,x:pos.x,s:pos.s};

    if(t) return;

    for(var i=0,a2=""; i<22; i++)

        a2+=map[i].toString(2).slice(1,-1)+"<br/>";

    for(var i=0,n; i<4; i++)

        if(/([^0]+)/.test(bak.fk[i].toString(2).replace(/1/g,"\u25a1")))

            a2=a2.substr(0,n=(bak.y+i+1)*15-RegExp.$_.length-4)+RegExp.$1+a2.slice(n+RegExp.$1.length);

    document.getElementById("box").innerHTML=a2.replace(/1/g,"\u25a0").replace(/0/g,"\u3000");

}

function is(){

    for(var i=0; i<4; i++)

        if((pos.fk[i]&map[pos.y+i])!=0) return pos=bak;

}

function rotate(r){

    var f=dia[pos.s=(pos.s+r)%dia.length];

    for(var i=0; i<4; i++)

        pos.fk[i]=(f>>(12-i*4)&15)<<pos.x;

    update(is());

}

function down(){

    ++pos.y;

    if(is()){

        for(var i=0; i<4 && pos.y+i<22; i++)

            if((map[pos.y+i]|=pos.fk[i])==0xfff)

                map.splice(pos.y+i,1), map.unshift(0x801);

        if(map[1]!=0x801) return over();

        start();

    }

    update();

}

function move(t,k){

    pos.x+=k;

    for(var i=0; i<4; i++)

        pos.fk[i]*=t;

    update(is());

}

document.onkeydown=function(e){

    eval(keycom[(e?e:event).keyCode]);

};

start();

run=setInterval("down()",400);

</script></body></html>
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javascript 60行编写的俄罗斯方块游戏

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