Panning a camera in 3d

1

Hellow there…
still playing around with AS3. I’m working on having a camera panning and rotating in a 3d enviroment.

I wrote one class for the 3dStage mc present on the main fla and another for the 3d objects I’m attaching. I got stuck on this error:
Error #1009: Cannot access a property or method of a null object reference.
which happens when I try to push a new created 3dObject in the array of the objects of the scene.

Here’s the code.

main fla:


import flash.events.Event;

stage3d.focalLength= 500;
var objectsInScene:Array;
var angleStep = 2*Math.PI/8;

for (var i=0; i<1; i++) {
	var newObject:Object3d = new Object3d();

	newObject.spin = 0;
	newObject.angle = angleStep*i;
	newObject.radius = 100;
	newObject.x = Math.cos(newObject.angle)*newObject.radius;
	newObject.z = Math.sin(newObject.angle)*newObject.radius;
	newObject.y = stage3d.y-100;
	newObject.addEventListener(Event.ADDED, stage3d.objectAdded);
	objectsInScene.push(newObject);
	addChild(newObject);
	
}

Stage3d.as :


package {

	import flash.display.MovieClip;
	import flash.events.Event;
	import Object3d;
	
	public class Stage3d extends MovieClip {
		
		/*
		* Instantiates a 3d stage
		*/

		public var z:Number;
		public var focalLength:Number;

		public function Stage3d() {
		}
		public function objectAdded(event:Event) {
			trace(event.target);
			displayObject(event.target);
		}
		private function displayObject(object3d:Object) {
			trace(object3d);
			var angle= object3d.angle + object3d.spin;
			var x3d = Math.cos(angle)*object3d.radius;
			var y3d = Math.sin(angle)*object3d.radius;
			var y3d = object3d.y;
			var scaleRatio = focalLength/(focalLength+z);
			x = x3d *scaleRatio;
			y = y3d *scaleRatio;
			scaleY = object3d.scaleY = 100*scaleRatio;
			scaleX = Math.sin(angle);
		}
		
		private function CreateCamera(xP, yP, rt) {
			var x:Number = xP;
			var y:Number = yP;
			var rotation:Number = rt;

		}
	}
}

Object3d.as :

package {
	import flash.display.MovieClip;
	
	/*
	* Define a 3d Object
	*/
	
	public class Object3d extends MovieClip {
		public var z:Number;
		public var angle:Number;
		public var radius:Number;
		public var spin:Number;
		
		
		public function Object3d() {
		}
	}
}

Many of you will probably find some similarties with the 3d Senocular tutorial for AS2. Well, guess what?
It IS the 3d Senocular tutorial!!

aha very funny. ehm.