forked from: わっさー

よく見かける表現だけど今更ながらやってみた

by bradsedito 05 Dec 2010

• Forked from 178ep3's わっさー
• Diff: 5
• Related works: 4
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/**
 * Copyright bradsedito ( http://wonderfl.net/user/bradsedito )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/asvZ
 */

// forked from 178ep3's わっさー
//よく見かける表現だけど今更ながらやってみた
package
{
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.geom.Point;
    
    [SWF(backgroundColor=0xffffff, frameRate=30)]
    public class Une extends Sprite
    {
        private var _list:Array = [];
        private var bmp:Bitmap;
        
        public function Une()
        {

            bmp = addChild(new Bitmap(new BitmapData(465,465,true,0x00)))as Bitmap;
            
            for(var i:uint=0; i<180; i++)
            {
                var p:Point = new Point(232,232);
                var n:Point = new Point(0,0);
                var length:Number = Math.random()*3+2;
                var angle:Number = i;
                var line:Number = Math.random()*3+5;
                var alpha:Number = Math.random()*0.5+0.5;
                var s:Eda = new Eda(p,n,length,angle,line,alpha);
                s.addEventListener("add",add);
                _list.push(s);
            }
            addEventListener(Event.ENTER_FRAME,loop);
        }
        
        private function add(e:Event):void
        {
            var o:Object = e.currentTarget.Property;
            var s:Eda = new Eda(o.p,o.n,o.l,o.a,o.li,o.al);
            _list.push(s);
        }
        
        private function loop(e:Event):void
        {
            var len:uint = _list.length-1;
            var i:int=0;
            for(i=len; i>=0; i--)
            {
                if(_list[i].Loop())_list.splice(i,1);
                else bmp.bitmapData.draw(_list[i]);
            }
            if(_list.length==0) removeEventListener(Event.ENTER_FRAME,loop);
        }
    }
}
    import flash.display.Shape;
    import flash.geom.Point;
    import flash.events.Event;
    
class Eda extends Shape
{
    private var p:Point;
    private var n:Point;
    private var length:Number;
    private var angle:Number;
    private var line:Number;
    private var alphas:Number;
            
    public function Eda(_p:Point,_n:Point,_length:Number,_angle:Number,_line:Number,_alpha:Number)
    {
        p = _p;
        n = _n;
        length = _length;
        angle = _angle;
        line = _line;
        alphas = _alpha;
    }
    
    public function get Property():Object
    {
        var sp:Point = new Point(p.x,p.y);
        var sn:Point = new Point(n.x,n.y);
        var slength:Number = length;
        var sangle:Number = angle;
        var sline:Number = line;
        var salphas:Number = alphas;
        
        return {p:sp,n:sn,l:slength,a:sangle,li:sline,al:salphas};
    }
    
    public function Loop():Boolean
    {
        n = Point.polar(length,angle*Math.PI/720);
        n.x += p.x;
        n.y += p.y;
        with(this.graphics)
        {
            clear();
            lineStyle(line,0x00,alphas);
            moveTo(p.x,p.y);
            lineTo(n.x,n.y);
            endFill();
        }
        length *= 0.99;
        line *= 0.96;
        alphas *=0.96;
        
        var j:Number = Math.random()-0.5;
        if(j<0)angle -= 6;
        else angle += 6;
        
        p.x = n.x;
        p.y = n.y;
        
        j = Math.random();
        if(j>0.92)dispatchEvent(new Event("add"));
        
        return alphas < 0.02
    }
}