js实现俄罗斯方块小游戏分享

前端技术 2023/09/05 JavaScript
复制代码 代码如下:

<!doctype html><html><head><style type=\"text/css\">
body { background:#000; font:25px/25px 宋体;}
#box { float:left;width:252px;border:#999 20px ridge;color:#9f9;text-shadow:2px 3px 1px #0f0; }
#info { float:left;color:#cfc;padding:24px; }
#next { padding:8px;width:105px;color:#9f9;text-shadow:2px 3px 1px #0f0; }
</style></head><body>
<div id=\"box\"></div><div id=\"info\">NEXT:<div id=\"next\"></div><div id=\"text\"></div></div>
<script type=\"text/javascript\">
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 char={x:\"\\u3000\",s:\"\\u25a0\",t:\"\\u25a1\"};
var keycom={\"38\":\"rotate(1)\",\"40\":\"down()\",\"37\":\"move(2,1)\",\"39\":\"move(0.5,-1)\",\"32\":\"0;pause=!pause\"};
var dia, pos, bak, run, next, pause=false, info={speed:1,lines:0,score:0};
function start(){
    dia=next.d;
    bak=pos={fk:[],y:0,x:4,s:next.s};
    nextdia();
    document.getElementById(\"next\").innerHTML=(next.d[next.s%next.d.length]|0x10000).toString(2).slice(-16).replace(/..../g,\"$&<br/>\").replace(/1/g,char.t).replace(/0/g,char.x);
    document.getElementById(\"text\").innerHTML=\"SCORE:\"+info.score+\"<br/><br/>LINES:\"+info.lines+\"<br/><br/>SPEED:\"+info.speed;
    rotate(0);
    run=setInterval(\"pause||down()\",~~(Math.pow(1.3,12-info.speed)*30+20));
}
function over(){
    document.onkeydown=null;
    alert(\"GAME OVER\");
}
function nextdia(){
    next={d:tatris[~~(Math.random()*7)],s:~~(Math.random()*4)};
}
function update(t){
    bak={fk:pos.fk.slice(0),y:pos.y,x:pos.x,s:pos.s};
    if(t) return;
    for(var i=0,a2=\"\"; i<22; i++)
        a2+=map[i].toString(2).slice(1,-1)+\"<br/>\";
    for(var i=0,n; i<4; i++)
        if(/([^0]+)/.test(bak.fk[i].toString(2).replace(/1/g,char.t)))
            a2=a2.substr(0,n=(bak.y+i+1)*15-RegExp.$_.length-4)+RegExp.$1+a2.slice(n+RegExp.$1.length);
    document.getElementById(\"box\").innerHTML=a2.replace(/1/g,char.s).replace(/0/g,char.x);
}
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, r=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);
                ++info.lines%20==0 && info.speed++, r++;
            }
        clearInterval(run);
        if(map[1]!=0x801) return over();
        info.score+=~~(Math.pow(r,1.5)*10)+2;
        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(\"pause||\"+keycom[(e?e:event).keyCode]);
};
nextdia();
start();
</script></body></html>

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