Ripple

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license : All rights reserved
modified : 2009-04-23 03:43:11

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package {
	import flash.display.Sprite;
	[SWF(width="465", height="465", frameRate="30", backgroundColor="0x000000")]
	
	public class Ripple extends Sprite {
		public function Ripple():void {	main = this; initialize(); }
	}
}

import flash.display.Sprite;
	import flash.display.Graphics;
	import flash.events.Event;
	import flash.events.MouseEvent;
	import flash.text.TextField;
	import flash.text.TextFormat;
	
	var main:Sprite, g:Graphics;
	var mouseClicked:Boolean;
	var collection:Array = new Array();
	
	function initialize():void {
		g = main.graphics;
		main.stage.addEventListener(MouseEvent.MOUSE_DOWN, function(e:Event):void { mouseClicked = true; });
		main.addEventListener(Event.ENTER_FRAME, update);
		
		var msg:TextField = new TextField();
		msg.text = 'どこでもクリックができる';
		//msg.text = 'You can click anywhere.';
		msg.x = (465 - msg.width) / 2;
		msg.y = (465 - msg.height) / 2;
		msg.textColor = 0xffffff; 
		msg.autoSize = "center";
		main.stage.addChild(msg);
        }
	
	function update(e:Event):void {
		g.clear();
		
		for(var i:int = 0; i < collection.length; i++)
			if(!collection[i].update()) {
				collection.splice(i, 1); 
				i--;
			}

if(mouseClicked == true) {
			mouseClicked = false;
			collection.push(new ExpandingCircle(main.mouseX, main.mouseY));
		}
	}

class ExpandingCircle extends Sprite {
		public var pos:Object = new Object();
		public var speed:int = 5;
		public var radius:Number = 0;
		
		public function ExpandingCircle(x:int, y:int):void {
			pos.x = x;
			pos.y = y;
		}
		
		public function update():Boolean {
			radius += speed;
			alpha -= 0.05;
			
			var lineWidth:Number = (5 / alpha < 10) ? 5 / alpha : 10;
			
			// Draw circle!
			g.lineStyle(lineWidth , 0xffffff, alpha);
			g.drawCircle(pos.x, pos.y, radius);
			
			if(alpha < 0) return false;
			else return true;
		}
	}

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