AS3 PV3D Preloader

/**
 * AS3 PV3D Preloader v2.2
 * Copyright (c) 2009 Marco Di Giuseppe	- http://designmarco.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package
{
	import flash.display.Sprite;
	import flash.display.Loader;
	import flash.display.Stage;
	import flash.display.StageScaleMode;
	import flash.display.StageQuality;
	import flash.display.StageAlign;
	import flash.events.Event;
	import flash.events.IEventDispatcher;
	import flash.events.IOErrorEvent;
	import flash.events.ProgressEvent;
	import flash.net.URLRequest;
	import com.greensock.easing.Expo;
	import com.greensock.TweenLite;
	/**
	 * Preloader Class Loads an External swf while
	 * animating a movieclip from the Library
	 */
	public class Preloader extends Sprite
	{
		private var swf:String = "main.swf"; //name of swf we are preloading
		private var inertia:Number = 5; //amount of easing applied to progress bar
		private var wait:Number = 2; // duration of time before loading begins
		private var preloader:PreloadClip; // library movieclip of logo
		private var barRatio:Number; // length of bar divided by 100
 
		public function Preloader()
		{
			addEventListener(Event.ENTER_FRAME, checkStage, false, 0, true);
		}
 
		/**
		 * Verify that the stage has been established by the browser
		 * @param	event
		 */
		private function checkStage(event:Event):void
		{
			if (stage.stageHeight > 0 && stage.stageWidth > 0)
			{
				removeEventListener(Event.ENTER_FRAME, checkStage);
				init();
			}
		}
 
		/**
		 * Initialize Preloader
		 */
		private function init():void
		{
			stage.scaleMode = "noScale";
			stage.quality = "High";
			stage.align = "TL";
 
			preloader = new PreloadClip();
			addChild(preloader);
 
			barRatio = preloader.progress_mc.bar.width / 100;
			preloader.x = stage.stageWidth * 0.5 - preloader.width * 0.5;
			preloader.y = stage.stageHeight * 0.3;
			preloader.progress_mc.bar.width = 0;
 
			var i:int = preloader.numChildren - 1;
			var logo:Sprite;
			while (i--)
			{
				logo = preloader.getChildByName("m" + i) as Sprite;
				TweenLite.from(logo, 0.4, { scaleX:10, scaleY:10, alpha:0, delay:i * 0.1, ease:Expo.easeOut } );
			}
 
			TweenLite.delayedCall(wait, loadContent);
		}
 
		/**
		 * Begin Loading Process
		 */
		private function loadContent():void
		{
			var loader:Loader = new Loader();
			var request:URLRequest = new URLRequest(swf);
			setListeners(loader.contentLoaderInfo, true);
			if (request) loader.load(request);
		}
 
		/**
		 * Display Loading Progress
		 * @param	event
		 */
		private function progressHandler(event:ProgressEvent):void
		{
			var percentLoaded:Number = int((event.bytesLoaded / 1024) / (event.bytesTotal / 1024) * 100);
			var barWidth:Number =  barRatio * percentLoaded;
			preloader.progress_mc.loading_txt.text = String(int(percentLoaded) + "%");
			preloader.progress_mc.bar.width += (barWidth - preloader.progress_mc.bar.width) / inertia;
 
			if (percentLoaded >= 100) preloader.visible = false;
		}
 
		/**
		 * Handle possible Loading Error
		 * @param	event
		 */
		private function ioErrorHandler(event:IOErrorEvent):void
		{
			trace("ioErrorHandler: " + event);
		}
 
		/**
		 * Add loaded swf to the display list
		 * @param	event
		 */
		private function completeHandler(event:Event):void
		{
			var main:* = event.target.content;
			TweenLite.from(main, 1, { alpha:0, delay:0.5, onStart:addChildAt, onStartParams:[main, 0], onComplete:destroy } );
			setListeners(main, false);
		}
 
		/**
		 * Remove Preloader
		 */
		private function destroy():void
		{
			if (preloader && preloader.parent)
			{
				preloader.parent.removeChild(preloader);
				preloader = null;
			}
		}
 
		/**
		 * Manage Loading Event Listeners
		 * @param	dispatcher
		 * @param	b
		 */
		private function setListeners(dispatcher:IEventDispatcher, b:Boolean):void
		{
			var state:String = b ? "addEventListener" : "removeEventListener";
			dispatcher[state](Event.COMPLETE, completeHandler);
			dispatcher[state](IOErrorEvent.IO_ERROR, ioErrorHandler);
			dispatcher[state](ProgressEvent.PROGRESS, progressHandler);
		}
	}
}

/**
 * 	PV3D 2.0 Basic Example
 * 	@author Marco Di Giuseppe
 * 	marco (at) designmarco (dot) com
 * 	http://designmarco.com
 */
package
{
	import flash.events.Event;
	import org.papervision3d.view.BasicView;
	import org.papervision3d.objects.primitives.Plane;
	import org.papervision3d.materials.BitmapAssetMaterial;
 
	public class Main extends BasicView
	{
		private var plane:Plane;
 
		public function Main()
		{
			super(0, 0, true);
			addEventListener(Event.ADDED_TO_STAGE, init, false, 0, true);
		}
 
		// initialize pv3d scene
		private function init(event:Event):void
		{
			removeEventListener(Event.ADDED_TO_STAGE, init);
 
			_camera.focus = 100;
			_camera.zoom  = 11;
 
			var material:BitmapAssetMaterial = new BitmapAssetMaterial("image");
			material.smooth = true;
			material.doubleSided = true;
 
			plane = new Plane(material, 500, 500, 2, 2);
			plane.pitch(20);
			scene.addChild(plane);
 
			addEventListener(Event.ENTER_FRAME, render, false, 0, true);
		}
 
		private function render(event:Event):void
		{
			plane.yaw(0.75);
			singleRender();
		}
	}
}