javascript 圣诞树,呵呵

 

 

代码 
<html>
    <head>
        <title>christree</title>
    </head>
    <body style="background:#111">
        <script type='text/javascript'>
            var $ = function(){
                var dom = {};
                return {
                    get : function($){
                        if(!dom[$]) dom[$] = document.getElementById($);
                        return dom[$];
                    }
                   ,apply : function(s,t,d){
                        if(t && typeof t == 'object') $.apply(s,d)
                        if(s && t && typeof s == 'object' && typeof t == 'object'){
                            for(var i in t){s[i] = t[i]}
                        }
                        return s;
                   }
                   ,createEl : function(attribute,tag){
                        if(!tag) tag = "DIV";
                        var el = document.createElement(tag);
                        $.apply(el,attribute);
                        return el;
                   }
                }
            }()
            var chrisTree = function(params){
                $.apply(this.param,params || {})
                this.__construct();
            }
            chrisTree.prototype = {
                param : {}
               ,__construct : function(){
                    var x = this.param.x,y = this.param.y,xy=[];
                    for(var i=0;i<7;i++){
                        xy = this.createTree(x,y,i/4)
                        x  = xy[0];
                        y  = xy[1];
                    }
                    this.createRoot(x,y,xy[2]);
               }
               ,createTree : function(x,y,level){
                    var lel = level || 0.1
                    for(i=0;i<110*lel;i+=10){
                        for(j=i-10;j<2*i;j+=10){
                            
                            var el = $.createEl({
                                id        : "div_"+x+"_"+i+"_"+y+"_"+j
                            },"span");

                            el.style.cssText = "width:5px;height:5px;position:absolute;left:"+(x - i*3/2 + j)+";top:"+(y+i)+";font-size:0px;background:#00ff00";

                            document.body.appendChild(el);
                            
                            if(j == i-10) this.lightUp(el.id,x - i*3/2 + j,y+i);
                        }
                        
                        this.lightUp(el.id,x - i*3/2 + j,y+i);
                    }
                    return [this.param.x,this.param.y+110*lel,y+i]
               }
               ,createRoot : function(x,y,l){
                    for(var i = 0;i<50;i++){
                        var el = $.createEl({
                                id    : "div_"+x+"_"+i+"_"+y+"_"+j
                            },"span");

                            el.style.cssText = "width:5px;height:5px;position:absolute;left:"+x+";top:"+(l+i)+";font-size:0px;background:#fff";

                            document.body.appendChild(el);
                    }
               }
               ,createText : function(text){
                    var el = $.createEl({
                        id : "text"
                       ,innerHTML : text
                       ,align:'center'
                    })
                    el.style.cssText = "color:#fff;background:#fff:margin:4px;padding:3px;top:500px;left:500;font-size:20px;position:absolute";

                    document.body.appendChild(el);
            
               }
               ,lightUp : function(id,x,y){
                    var self = this,i=0;
                    setTimeout(function(){
                        i++;
                        $.get(id).style.background = self.lightColor[i%self.lightColor.length];
                        setTimeout(arguments.callee,200);
                    },this.param.howToShine(x,y))
               }
               ,lightColor : ['#ff0000',"#00ff00","#ffff00","#ff6600","#66ff00"]

            }

            new chrisTree({
                x : 400
               ,y : 50
               ,howToShine : function(x,y){return 100+x-y}
            })

            new chrisTree({
                x : 600
               ,y : 50
               ,howToShine : function(x,y){return Math.sqrt(x*x-2*x*y+y*y)*10}
            })
            var ct = new chrisTree({
                x : 800
               ,y : 50
               ,howToShine : function(x,y){return x+y}
            });ct.createText('Merry chrismas!:)))))');
        </script>
        
    </body>
</html>

 

 

 

 

 

posted @ 2009-12-25 23:26  一缕青烟  阅读(635)  评论(8)  编辑  收藏  举报