I think a good place to start is with the 
B3DBox and try to understand how that works.

Karl

"rhian.lewis" wrote:
> 
> r(theta) = R cos theta i + R sin theta j + C theta  is a general helix
> curve passing through three dimensional space.
> 
> Rather than trying to explain the problems I am having, and spending weeks
> trying to decipher this B3D code I thought I would ask for help . I have
> looked at B3DMorph, and although I understand in principal the structure of
> the code, I am still finding it dificult to interact with the B3D renderer.
> 
> Has anyone had experience representing such curves using Squeak, or maybe
> have some worked examples of representations of other 3D objects, eg
> spheres, cones etc.  How do I actually get the real points into the
> rederer?  and how do you go about getting a representation of a 3D axis in
> the middle of the screen.  I would kind of like a transparent cube in the
> center of the sceen in which to place objects.  As you can see I am lost.
> Help!!!!!!
> 
> My helix is  r (theta) = 2 cos theta i + 2 sin theta j + 0.3 theta k.