flash on 2009-10-18

...
@author Motoki Matsumoto

by mtok 18 Oct 2009

Embed

/**
 * Copyright mtok ( http://wonderfl.net/user/mtok )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/tT16
 */

package  
{
	import flash.display.Graphics;
	import flash.display.Sprite;
	import flash.events.Event;
	
	/**
	 * ...
	 * @author Motoki Matsumoto
	 */
	public class Curves extends Sprite
	{
		private var canvas:Sprite;
		private var vecLen:Number = 50;
		private var _dlta_th:Number = Math.PI / 100;
		public function Curves() 
		{
			addEventListener(Event.ADDED_TO_STAGE, addedToStageHandler);
		}
		
		private function addedToStageHandler(e:Event):void 
		{
			removeEventListener(Event.ADDED_TO_STAGE, addedToStageHandler);
			addChild(canvas = new Sprite());
			canvas.x = 465 * .5;
			canvas.y = 465 * .5 - 100;
			canvas.graphics.lineStyle(1, 0xff0000);
			draw(canvas.graphics);
		}
		private function draw(g:Graphics):void {
			var th:Number = 0, tmp:Number;
			var limit:Number = 2 * Math.PI;
			var cx:Number, cy:Number, ax:Number, ay:Number;
			var cos:Function = Math.cos;
			var sin:Function = Math.sin;
			var r:Number;
			var vfac:Number;
			while (th < 2 * Math.PI) {
				r = vecLen ;// + 20 * (Math.random() - 0.5);
				vfac = 100 ;// + 10 * (Math.random() - 0.5);
				tmp = th + 0.01 * (Math.random() - 0.5);
				cx = r * cos(tmp);
				cy = r * sin(tmp);
				ax = cx * 3;
				ay = vfac + (cy * 3);
				g.moveTo(0, 0);
				g.curveTo(cx, cy, ax, ay);
				th += _dlta_th;
			}
		}
	}
}