ribbon.draw();

before every render cycle?

var material:FlatShadeMaterial = new FlatShadeMaterial( light, 0x98014E, 0×333333);
material.doubleSided = true;

var light:PointLight3D = new PointLight3D();
scene.addChild( light );

var ribbon:Ribbon3D = new Ribbon3D( pretoMaterial, 500, 100 );
container.addChild( ribbon );
ribbon.draw();

scene.addChild(container);

then i render this, but nothing happens.
what i forgot to do?

The 0 bitwise shift simple floors the number, so it is the same as Math.floor() but faster to compute. You could also cast the number to an integer, which is also fast:

for (var i:int = 0; i < int( d * .6); i++)

var n : int = d * .6;
for (var i:int = 0; i < n; i++)
[...]

[code]
for (var i:int = 0; i < d * .6 << 0; i++)
b.push( {
x:random( -UNIVERSE, UNIVERSE ),
y:random( -UNIVERSE, UNIVERSE ),
z:random( -UNIVERSE, UNIVERSE )
} );

[/code]

I have some truble trying to understand that bitwise shift operator, since I know that the second parameter of that operator state the number of position of the shift, but you use 0, so I cannot understand. Perhaps it is something related to the 0-based system, so that is a 1 position shifting?

Anyway thank you for sharing!

First of all, thanks and congrats for all this great stuff!

I’ve decided to take sometime to play around with your Ribbon class, which is really nice, and I’m trying to make it work on a transparent background, but I can’t figure out why it just doesn’t work properly if I comment the background.draw() code piece and take the layer out. Could you give me a clue please? I’ve uploaded my testing file to http://www.izaias.com/download/Ribbon3dDemo.zip. It’s not that clean but it’s hopefully understandable.

Much appreciated.