• 几十行代码就搞定俄罗斯方块


    写的不错,思路也很清晰,学习一下!

    <!doctype html>
    <html>
    
    <head>
        <title>俄罗斯方块</title>
        <style type="text/css">
          body { color:#dbdbdb; background:#000; font:25px/25px 宋体; }
          #box { position:absolute; left:50%; top:10px; margin-left:-220px; width:252px;border:#999 5px ridge; }
          #info {    position:absolute; left:50%; top:30px; margin-left:90px; font-family: Microsoft YaHei;}
          #next { padding:8px;width:105px; font-family: 宋体;}
          #rend { padding-top:30px; font:16px/25px 宋体;font-family: Microsoft YaHei; }
          #rend span { color:#ffff00; }
        </style>
    </head>
    
    <body class="c0">
        <div id="box" class="color"></div>
        <div id="info">
            NEXT:<div id="next" class="color"></div>
            <div id="text"></div>
            <div id="rend">
                <span>←↓→</span>:控制方向<br />
                <span>Z X ↑</span>:改变形状<br />
                <span>Shift</span> :一键到底<br />
                <span>空格键</span>:暂停<br />
            </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 downkey={}, 
                retkey={"40":3,"37":6,"39":6},  
                keycom={
                    "38":"rotate(1)",
                    "90":"rotate(1)",
                    "88":"rotate(3)",
                    "40":"down()","16":
                    "fastdown()",
                    "37":"move(1)",
                    "39":"move(-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,"$&<br/>").replace(/1/g,char.t).replace(/0/g,char.x);
                 document.getElementById("text").innerHTML="SCORE:"+info.score+"<br/><br/>LINES:"+info.lines+"<br/><br/>SPEED:"+info.speed;
                rotate(0);
                run=setInterval("pause||down()",~~(Math.pow(1.3,12-info.speed)*30+20));
            }
            function over(){
                clearInterval(kTime);
                alert("GAME OVER");
            }
            function nextdia(){
                next={d:tatris[~~(Math.random()*7)],s:~~(Math.random()*4)};
            }
            function update(t){
                t&&(pos=bak);
                bak={fk:pos.fk.slice(0),y:pos.y,x:pos.x,s:pos.s};
                if(t) return;
                for(var i=0,a2=""; i<22; i++)
                    a2+=map[i].toString(2).slice(1,-1)+"<br/>";
                for(var i=0,n; i<4; i++)
                    if(/([^0]+)/.test(bak.fk[i].toString(2).replace(/1/g,char.t)))
                        a2=a2.substr(0,n=(bak.y+i+1)*15-RegExp.$_.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 true;
            }
            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()&&ert(1)&&ert(-2)&&ert(-1));
            }
            function down(){
                ++pos.y;
                if(is()){
                    pos=bak;
                    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);
                            r++;
                            if(++info.lines%20==0)
                                document.body.className="c"+info.speed++%7;
                        }
                    clearInterval(run);
                    if(map[1]!=0x801) return over();
                    info.score+=~~(Math.pow(r,1.8)*10)+2;
                    start();
                }
                update();
            }
            function fastdown(){
                clearInterval(run);
                run=setInterval("pause||down()",12);
            }
            function move(k){
                update(ert(k));
            }
            function ert(k){
                pos.x+=k;
                for(var i=0; i<4; i++)
                    k>0 ? pos.fk[i]<<=k : pos.fk[i]>>=-k;
                return is();
            }
            document.onkeydown=function(e){
                var k=(e||event).keyCode;
                if(keycom[k] && !(k in downkey))
                    downkey[k]=0;
            };
            document.onkeyup=function(e){
                var k=(e||event).keyCode;
                if(keycom[k])
                    delete downkey[k];
            };
            var kTime = setInterval(function(){
                for(var k in downkey)
                    if(++downkey[k]==1 || retkey[k] && downkey[k]>retkey[k])
                        eval("pause||"+keycom[k]);
            },25);
            nextdia();
            start();
        </script>
    
    </body>
    
    </html>
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  • 原文地址:https://www.cnblogs.com/shoestrong/p/5725871.html
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