/**
* ...
* @author Default
* @version 0.1
*/
 
package {
 
    public class PaperBase {
 
       public function PaperBase() {
 
       }
 
    }
 
}

package  {
    // These lines make differant 'pieces' available in your code.
    import flash.display.Sprite; // To extend this class
    import flash.events.Event; // To work out when a frame is entered.
 
    import org.papervision3d.view.Viewport3D; // We need a viewport
    import org.papervision3d.cameras.*; // Import all types of camera
    import org.papervision3d.scenes.Scene3D; // We'll need at least one scene
    import org.papervision3d.render.BasicRenderEngine; // And we need a renderer
 
    public class PaperBase extends Sprite { //Must be "extends Sprite"
 
       public var viewport:Viewport3D; // The Viewport
       public var renderer:BasicRenderEngine; // Rendering engine
       // -- Scenes -- //
       public var default_scene:Scene3D; // A Scene
       // -- Cameras --//
       public var default_camera:Camera3D; // A Camera
 
       public function init(vpWidth:Number = 800, vpHeight:Number = 600):void {
         initPapervision(vpWidth, vpHeight); // Initialise papervision
         init3d(); // Initialise the 3d stuff..
         init2d(); // Initialise the interface..
         initEvents(); // Set up any event listeners..
       }
 
       protected function initPapervision(vpWidth:Number, vpHeight:Number):void {
         // Here is where we initialise everything we need to
         // render a papervision scene.
         viewport = new Viewport3D(vpWidth, vpHeight);
         // The viewport is the object added to the flash scene.
         // You 'look at' the papervision scene through the viewport
         // window, which is placed on the flash stage.
         addChild(viewport); // Add the viewport to the stage.
         // Initialise the rendering engine.
         renderer = new BasicRenderEngine();
         // -- Initialise the Scenes -- //
         default_scene = new Scene3D();
         // -- Initialise the Cameras -- //
         default_camera = new Camera3D(); // The argument passed to the camera
         // is the object that it should look at. I've passed the scene object
         // so that the camera is always pointing at the centre of the scene.
       }
 
       protected function init3d():void {
         // This function should hold all of the stages needed
         // to initialise everything used for papervision.
         // Models, materials, cameras etc.
       }
 
       protected function init2d():void {
         // This function should create all of the 2d items
         // that will be overlayed on your papervision project.
         // User interfaces, Heads up displays etc.
       }
 
       protected function initEvents():void {
         // This function makes the onFrame function get called for
         // every frame.
         addEventListener(Event.ENTER_FRAME, onEnterFrame);
         // This line of code makes the onEnterFrame function get
         // called when every frame is entered.
       }
 
       protected function processFrame():void {
         // Process any movement or animation here.
       }
 
       protected function onEnterFrame( ThisEvent:Event ):void {
         //We need to render the scene and update anything here.
         processFrame();
         renderer.renderScene(default_scene, default_camera, viewport);
       }
 
    }
 
}