flash on 2009-11-26

/**
 * Copyright hacker_929p08ld ( http://wonderfl.net/user/hacker_929p08ld )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/v66G
 */

package{
	import flash.display.*;
	import flash.events.*;
	import flash.geom.*;
	import flash.utils.*;
	import flash.filters.*;
	
	/*
	一つ前の投稿と同じく、
	「miscellaneous」さん
	http://yamasv.blog92.fc2.com/blog-entry-157.html
	のコードをお借りしています。
	*/
	
	public class f22 extends Sprite{
		private var balls:Array = [];
		private var timer:Timer = null;
		private var tick:Number = 0;
		private var rad:Number = 0;
		private var colors:Array = [0xFF0000, 0xFFFF00, 0xFFFFFF];
		private var alphas:Array = [0, 0.5, 1];
		private var ratios:Array = [0, 192, 255];
		private var gradientGlowFilter:GradientGlowFilter = new GradientGlowFilter(0, 0, colors, alphas, ratios, 32, 32, 3, 3, "outer", false);
		
		
		private var ball:Ball = new Ball(0xffffff, 30);
		
		public function f22(){
			ball.alpha = 0.6;
			ball.filters = [gradientGlowFilter];
			addChild(ball);
			
			
			timer = new Timer(50);
			timer.addEventListener(TimerEvent.TIMER, cal);
			timer.start();
		}

		private function cal(e:Event) :void{
			var x:Number = Math.PI*2*tick - Math.PI;
			var fx:Number = 0;
			for(var i:Number = 0 ; i < 11 ; i++){
			fx += Math.pow(2, -i)*Math.sin(Math.pow(2,i)*x);
		}
		
		fx = (fx+1.5)/3;
		trace(fx);
		rad += fx/10.0;
		ball.alpha = fx;
		ball.x = Math.cos(rad)*150 + 200;
		ball.y = Math.sin(rad)*150 + 200;

		tick += 0.01;
		if(tick > 1)
		tick =0;
	}

}

import flash.display.*;

internal class Ball extends Sprite{
		public function Ball(color:int, radius:int){
		graphics.beginFill(color);
		graphics.drawCircle(0,0,radius);
		graphics.endFill();
	}
}