Away3D Skyboxes

package {
 
	import away3d.cameras.HoverCamera3D;
	import away3d.containers.Scene3D;
	import away3d.containers.View3D;
	import away3d.materials.BitmapMaterial;
	import away3d.primitives.Skybox;
	import away3d.core.utils.Cast;
	import flash.display.StageAlign;
	import flash.display.StageScaleMode;
	import flash.display.Sprite;
	import flash.events.Event;
	import flash.events.MouseEvent;
 
	public class SkyStuff extends Sprite {
 
		public var cam:HoverCamera3D = new HoverCamera3D( { zoom:2 } );
		public var scene:Scene3D = new Scene3D;
		public var view:View3D = new View3D( { camera:cam, scene:scene, x:0, y:0 } );
 
		// Skybox stuff.
		public var sky:Skybox;
		// Materials....
		public var sky_front_material:BitmapMaterial;
		public var sky_back_material:BitmapMaterial;
		public var sky_left_material:BitmapMaterial;
		public var sky_right_material:BitmapMaterial;
		public var sky_up_material:BitmapMaterial;
		public var sky_down_material:BitmapMaterial;
 
		// Movement vars.
		public var move:Boolean = false;
		public var lastPanAngle:Number;
		public var lastTiltAngle:Number;
		public var lastMouseX:Number;
		public var lastMouseY:Number;
 
		public function SkyStuff():void {
			addEventListener(Event.ADDED_TO_STAGE, Init);
		}
 
		private function Init(evt:Event):void {
			InitStage();
			InitEngine();
			InitMaterials();
			InitObjects();
			InitListeners();
		}
 
		private function InitStage():void {
			stage.align = StageAlign.TOP_LEFT
			stage.scaleMode = StageScaleMode.NO_SCALE;
		}
 
		private function InitEngine():void {
			cam.mintiltangle = -80;
			cam.maxtiltangle = 20;
			cam.targetpanangle = cam.panangle = 0;
			cam.targettiltangle = cam.tiltangle = 0;
 
			addChild(view);
		}
 
		private function InitObjects():void {
			sky = new Skybox( sky_front_material, sky_left_material, sky_back_material, sky_right_material, sky_up_material, sky_down_material );
			sky.quarterFaces();
			view.scene.addChild(sky);
		}
 
		private function InitMaterials():void {
			sky_front_material = new BitmapMaterial(Cast.bitmap(SkyFront));
			sky_back_material = new BitmapMaterial(Cast.bitmap(SkyBack));
			sky_left_material = new BitmapMaterial(Cast.bitmap(SkyLeft));
			sky_up_material = new BitmapMaterial(Cast.bitmap(SkyTop));
			sky_right_material = new BitmapMaterial(Cast.bitmap(SkyRight));
		}
 
		private function InitListeners():void {
			addEventListener(Event.ENTER_FRAME, EnterFrame);
			stage.addEventListener(MouseEvent.MOUSE_DOWN, MouseDown);
			stage.addEventListener(MouseEvent.MOUSE_UP, MouseUp);
			stage.addEventListener(Event.RESIZE, Resize);
		}
 
		private function EnterFrame(evt:Event):void {
			if (move) {
				cam.targetpanangle = 0.3 * (stage.mouseX - lastMouseX) + lastPanAngle;
				cam.targettiltangle = 0.3 * (stage.mouseY - lastMouseY) + lastTiltAngle;
			}
			cam.hover();
			view.render();
		}
 
		private function MouseDown(evt:MouseEvent):void {
			lastPanAngle = cam.panangle;
			lastTiltAngle = cam.tiltangle;
			lastMouseX = stage.mouseX;
			lastMouseY = stage.mouseY;
			move = true;
			stage.addEventListener(Event.MOUSE_LEAVE, onStageMouseLeave);
		}
 
		private function MouseUp(evt:MouseEvent):void {
			move = false;
			stage.removeEventListener(Event.MOUSE_LEAVE, onStageMouseLeave);
		}
 
		private function onStageMouseLeave(evt:Event):void {
			move = false;
			stage.removeEventListener(Event.MOUSE_LEAVE, onStageMouseLeave);
		}
 
		private function Resize(evt:Event):void {
			view.x = stage.stageWidth / 3;
			view.y = stage.stageHeight / 3;
		}
	}
 
}