forked from: forked from: Mycelium

by 1sunbou 26 Jun 2011

Embed

/**
 * Copyright 1sunbou ( http://wonderfl.net/user/1sunbou )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/fHlf
 */

// forked from Shiro0330's forked from: Mycelium
// forked from makc3d's Mycelium
// click to load custom image ;)
// inspired by http://onecm.com/projects/mycelium/
package {

    import flash.display.*;
    import flash.events.*;
    import flash.net.FileReference;
    import flash.net.URLRequest;
    import flash.system.LoaderContext;


    [SWF(width=465, height=465)]

       public class FunctionUse extends MovieClip {
        private var canvas:BitmapData;
        private var walkerNum:int;
        private var walkers:Vector.<Function>;

        private var loader:Loader;
        private var file:FileReference;

               public function FunctionUse(){
                  // init
                  loader = new Loader;
                  loader.contentLoaderInfo.addEventListener (Event.COMPLETE, init);
                  loader.load (new URLRequest ("http://a1.twimg.com/profile_images/423176540/head.jpg"),
                    new LoaderContext (true));
               }

        public function init (e:Event):void {
            if (canvas == null) {
            canvas = new BitmapData(465,465,false, 0x000000);
            addChild(new Bitmap(canvas,"auto",true));
             
            
            walkerNum = 50000;
            walkers = new Vector.<Function>(walkerNum, true);
            runWalkers();
            } else {
                canvas.fillRect (canvas.rect, 0);
            }    
            makeWalkers();

               }
               // private methods

        private function makeWalkers():void{
            var bd:BitmapData = loader.content["bitmapData"];
            for (var i:int = 0; i < walkerNum; i++) {
                var ix:int = 465 * Math.random ();
                var iy:int = 465 * Math.random ();
                walkers[i] = makeWalker(ix, iy,
                    (bd.getPixel (
                        ix * bd.width / 465.0,
                        iy * bd.height / 465.0)
                    & 0xFF00) >> 10);
            }
        }
        private function runWalkers():void{
            addEventListener(Event.ENTER_FRAME, onRun);
            file = new FileReference;
            file.addEventListener (Event.SELECT, onFileSelected);
            file.addEventListener (Event.COMPLETE, onFileLoaded);
            stage.addEventListener (MouseEvent.CLICK, loadUserImage);
        }

        private function loadUserImage (e:MouseEvent):void { file.browse (); }
        private function onFileSelected (e:Event):void { file.load (); }
        private function onFileLoaded (e:Event):void { loader.loadBytes (file.data); }
        private function onImageReady (e:Event):void {
        }
        private function onRun(evt:Event):void {
            canvas.lock ();
            for (var i:int = 0; i<walkerNum; i++){
                walkers[i]();
            }
            canvas.unlock ();
        }
        private function makeWalker(xp:Number=200, yp:Number=200, dieAt:int=64):Function{
            var age:int = dieAt;
            var x:Number = xp, y:Number = yp;
            var rad:Number = Math.random();
            var theta:Number = Math.random() * Math.PI * 200000;
            var speed:Number = 0.01 * Math.random() * 2;
            if (int(Math.random() * 2) == 1){
                speed *= -1;
            }
            return function():void{
                if (age --< 1) return;
                x += rad * Math.cos(theta);
                y += rad * Math.sin(theta);
                theta += speed
                if (int(Math.random() * 100) == 1){
                    theta = Math.random() * Math.PI * 2;
                }
                if (!(x > 465 || x < 0 || y > 465 || y < 0)){
                    canvas.setPixel(x, y, Math.max (0x40404*age, canvas.getPixel (x, y)));
                }
                

            }
        }
        

       }

}