【编程游戏】贺岁放礼花。（点燃续帖2-142楼sharp_ice的焰火）

来源：互联网发布：java bigdecimal 除法编辑：程序博客网时间：2024/05/29 05:57

【编程游戏】贺岁放礼花。（第一名奖励10000可用分）
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head>    <title>【sharp_ice】的礼花</title>    <style type="text/css">    body{        background-color:Black;        color:White;        margin:0px;    }    div{        position:absolute;    }    </style>    <script language="javascript" type="text/javascript">    var speed=[],stars=[],bombs=[],d=60;    var steps=50;    function InitSpeed(){        for(var i=1;i<=steps;i++){            speed.push(i*2.0/steps-i*i/(steps*steps));        }    }    function Moving(){        for(var i=0;i<bombs.length;i++)            bombs[i].Move();        setTimeout("Moving()",1);    }    function GetColor(){               var color=parseInt(Math.random()*16771216);        var sc=color.toString(16);        while(sc.length<6){            sc="0"+sc;        }        return "#"+sc;    }    function Pos(x,y){this.x=x; this.y=y;}    function Star(c,p1,p2){        this.div=document.createElement("div");        this.div.innerHTML=c;        /*if(this.div.filters)            this.div.style.filter="alpha(Opacity="+(100-parseInt(80.0*this.i/speed.length))+")";*/        document.body.appendChild(this.div);        this.i=0;        this.onStart=null;        this.onEnd=null;        this.moving=true;        this.EndMove();        this.p1=p1;        this.p2=p2;    }    Star.prototype={        constructor:Star,        Move:function()        {            if(!this.moving) return;            if(this.i>=speed.length){                this.i=0;                this.EndMove();                return;            }            var sp=speed[this.i];            var cx=(this.p2.x-this.p1.x)*sp;            var cy=(this.p2.y-this.p1.y)*sp;            this.div.style.left=parseInt(this.p1.x+cx)+"px";            this.div.style.top=parseInt(this.p1.y+cy)+"px";            this.div.style.color=GetColor();            /*if(this.div.filters)                this.div.filters(0).opacity=(100-parseInt(70.0*this.i/speed.length));            else                this.div.style.opacity=(100-parseInt(70.0*this.i/speed.length))/100;*/            if(this.div.style.display!="block")                this.div.style.display="block";            this.i++;        },        StartMove:function(){            if(this.moving)                return;            this.moving=true;            if(this.onStart)                this.onStart();        },        EndMove:function(){            if(!this.moving)                return;            this.moving=false;            this.div.style.display="none";            if(this.onEnd)                this.onEnd();        }    }    var starCount=16;    function Bomb(){        var _this=this;        var count=0;        this.bomb=new Star("·",new Pos(0,0),new Pos(0,0));        this.stars=[];        for(var i=0;i<starCount;i++){            var st=new Star("·",new Pos(0,0),new Pos(0,0));            this.stars.push(st);            st.onEnd=function(){                _this.Fire();            }        }        this.bomb.onEnd=function(){            for(var i=0;i<_this.stars.length;i++){                _this.stars[i].StartMove();            }        }    }    Bomb.prototype={        constructor:Bomb,        Fire:function(){            if(this.bomb.moving)                return;            this.count=Math.round(Math.random()*steps);            var color=GetColor();            var w=document.documentElement.clientWidth;            var h=document.documentElement.clientHeight;            var x=(w-4*d)*Math.random()+2*d;            var y=(h-4*d)*Math.random()+2*d;            this.bomb.p1.x=x;            this.bomb.p1.y=h-50;            this.bomb.p2.x=x;            this.bomb.p2.y=y;            this.bomb.div.style.color=color;            var t=Math.round(Math.random());            for(var i=0;i<this.stars.length;i++){                var l;                if(t)                    l=Math.random()*100;                else                    l=d;                var star=this.stars[i];                star.p1.x=x;                star.p1.y=y;                var a=Math.PI*i*2/this.stars.length;                star.p2.x=x+Math.cos(a)*l;                star.p2.y=y+Math.sin(a)*l;                star.div.style.color=color;            }            this.bomb.StartMove();        },        Move:function(){            if(this.bomb.moving){                if(this.count>0)                {                    this.count--;                    return;                }                this.bomb.Move();            }            else{                for(var i=0;i<this.stars.length;i++){                    this.stars[i].Move();                }            }        }    }    window.onload=function(){        InitSpeed();                for(var i=0;i<10;i++)        {            var b=new Bomb();            b.Fire();            bombs.push(b);        }        setTimeout("Moving()",1);    }    </script></head><body></body></html>

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