[Papervision3D] First-steps question

[joa e.]

Taking a look at the examples Ricardo was showing here 
(http://www.ricardocabello.com/?postid=312) I started to play also 
around with it. It was good that Ricardo was not providing all the 
source files because now I started with a simple thing and you guys can 
tell, what is wrong.

Actually the only missing thing is the cube class. Now I started with a 
simple Cube class and would like to get some suggestions. Take this code 
as an outside perspective. I have the feeling that some stuff could be 
done simpler? Also I have to set the material doubleSided but only 
because the planes are not aligned correct I guess.

You can see the example output as well at 
http://je2050.de/showroom.php?file=cubes
It was more a quick test and is actually only the stuff Ricardo was 
already showing. But does anyone know why the GlowFilter is not used 
sometimes?

Anyways. Here is the code and I hope you can give me some hints.

import org.papervision3d.core.Matrix3D;
import org.papervision3d.core.proto.MaterialObject3D;
import org.papervision3d.objects.Plane;
import org.papervision3d.scenes.DisplayObject3D;

class Cube extends DisplayObject3D
{
    private var top:    Plane;
    private var bottom: Plane;
    private var right:  Plane;
    private var left:   Plane;
    private var back:   Plane;
    private var front:  Plane;
   
    public function Cube( material: MaterialObject3D, width: Number, 
height: Number )
    {
        top    = new Plane( material, width, height, 1, 1 );
        bottom = new Plane( material, width, height, 1, 1 );
        right  = new Plane( material, width, height, 1, 1 );
        left   = new Plane( material, width, height, 1, 1 );
        back   = new Plane( material, width, height, 1, 1 );
        front  = new Plane( material, width, height, 1, 1 );

        top.transformVertices(    Matrix3D.rotationX( Math.PI * .5 ) );
        top.transformVertices(    Matrix3D.translationMatrix( 0, -height 
* .5, 0 ) );
       
        bottom.transformVertices( Matrix3D.rotationX( Math.PI * .5 ) );
        bottom.transformVertices( Matrix3D.translationMatrix( 0, height 
* .5, 0 ) );
       
        right.transformVertices(  Matrix3D.rotationY( Math.PI * .5 ) );
        right.transformVertices(  Matrix3D.translationMatrix( width * 
.5, 0, 0 ) );
       
        left.transformVertices(   Matrix3D.rotationY( Math.PI * .5 ) );
        left.transformVertices(   Matrix3D.translationMatrix( -width * 
.5, 0, 0 ) );
       
        back.transformVertices(   Matrix3D.translationMatrix( 0, 0, 
width * .5 ) );
       
        front.transformVertices(  Matrix3D.translationMatrix( 0, 0, 
-width * .5 ) );

        addChild( top, 'top' );
        addChild( bottom, 'bottom' );
        addChild( right, 'right' );
        addChild( left, 'left' );
        addChild( back, 'back' );       
        addChild( front, 'front' );
    }
}