forked from: forked from: radial magnifier

...
@author ...

by geta 01 Sep 2009

Embed

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

// forked from getabako's forked from: radial magnifier
// forked from arithma's radial magnifier
package 
{
	import flash.display.Shape;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
	
	/**
	 * ...
	 * @author ...
	 */
	public class Main extends Sprite 
	{
		private static const N:int = 1024;
		private static const M:Number = 10;
		private static const C:Number = 5/100;
		private var list:Array;
		private var positions:Array;
		public function Main():void 
		{
			list = new Array();
			positions = new Array();
			if (stage) init();
			else addEventListener(Event.ADDED_TO_STAGE, init);
		}
		
		private function init(e:Event = null):void 
		{
			
			removeEventListener(Event.ADDED_TO_STAGE, init);
			stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveListener);
			stage.frameRate = 120;
			// entry point
			for (var i:int = 0; i < N; i++) {
				var shape:Shape = new Shape();
				shape.graphics.beginFill(Math.random() * 0xFF);
				shape.graphics.drawCircle( 0, 0, Math.random() * 5 + 5);
				//shape.graphics.drawRect( 0, 0, 5, 5);
                                shape.graphics.endFill();
				var pos:Object = { x:stage.stageWidth / 32 * (i%32), y:stage.stageHeight * Math.random() };
				var pos:Object = { x:stage.stageWidth / 32 * (i%32), y:stage.stageHeight / 32 * Math.floor(i/32) };
				shape.x = pos.x;
				shape.y = pos.y;
				positions.push(pos);
				addChild(shape);
				list.push(shape);
			}
		}
		
		private function mouseMoveListener(e:MouseEvent = null):void {
			for (var i:int = 0; i < N; i++) {
				var shape:Shape = list[i];
				var pos:Object = positions[i];
				var diff:Object = {x:pos.x-mouseX, y:pos.y-mouseY};
				var dist:Number = Math.sqrt(diff.x*diff.x + diff.y*diff.y);
				
				var scale:Number = 1 + (M - 1) * Math.exp( -dist * C);
				shape.scaleX = scale;
				shape.scaleY = scale;
				
				var ndist:Number = (Math.exp( -C * dist) - 1) * (1 - M) / C + dist;
				var ndistRatio:Number = ndist / dist;
				var ndiff:Object = { x:diff.x * ndistRatio, y:diff.y * ndistRatio };
				shape.x = mouseX + ndiff.x;
				shape.y = mouseY + ndiff.y;
			}
		}
		
	}
	
}