Ring

forked:2
favorite:11
lines:57
license : MIT License
modified : 2010-05-03 23:46:36

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package {

import flash.display.*;
	import flash.events.*;

[SWF(width = 500, height=500)]

public class Ring extends MovieClip {
		private var ring:MovieClip;

public function Ring(){
                  // init
			ring = createRing();
			ring.x = stage.stageWidth / 2;
			ring.y = stage.stageHeight / 2;
			addChild(ring);

}
               // private methods

private function createRing(sectionNum:int = 30):MovieClip{
			var container:MovieClip = new MovieClip();
			container.circles = [];
			container.theta = 0;
			container.thetaDest = 0;
			var step:Number = (Math.PI * 2) / sectionNum;
			for (var i:int = 0; i<sectionNum; i++){
				var c:MovieClip = new MovieClip();
				with (c.graphics){
					lineStyle(0,0x000000);
					beginFill(0xCCCCCC);
					drawCircle(0,0,20);
				}
				c.thetaOffset = step * i;
				container.addChild(c);
				container.circles.push(c);
			}
			container.addEventListener(Event.ENTER_FRAME, onRun);
			return container;
		}
		private function onRun(evt:Event):void {
			var container:MovieClip = MovieClip(evt.currentTarget);
			var num:int = container.circles.length;
			for (var i:int = 0; i<num; i++){
				var c:MovieClip = container.circles[i];
				var angle:Number = container.theta + c.thetaOffset;
				c.x = 200 * Math.cos(angle);
				c.y = 100 * Math.sin(angle);
				c.scaleX = (100 + c.y) / 120 + 0.2;
				c.scaleY = c.scaleX;
			}
			container.circles.sortOn("y", Array.NUMERIC);
			for (i = 0; i<num; i++){
				container.addChild(container.circles[i]);
			}
			if (container.mouseX < -100){
				container.thetaDest -= 0.05;
			}
			if (container.mouseX > 100){
				container.thetaDest += 0.05;
			}
			container.theta += (container.thetaDest  - container.theta) / 12;
			
		}

}

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