panning a camera in 3d

[tezzutezzu]

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.

[senocular]

you didnt define objectsInScene as an array, just declared it as one.

var objectsInScene:Array = []; // or new Array();

[tezzutezzu]

Yep. Just found out when I published the post.
And also I found out that I made a little mess with the concept. :whistle:

I'm sorry about it! I'll double check next time when I publish.

and obviously thanks Sen:sen:cular !