js实现俄罗斯方块小游戏分享【javascript】

web前端|js教程

俄罗斯方块小游戏

web前端-js教程

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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; }

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NEXT:

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,”$&

“).replace(/1/g,char.t).replace(/0/g,char.x);

document.getElementById(“text”).innerHTML=”SCORE:”+info.score+”

LINES:”+info.lines+”

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)+”

“;

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();