Also check out the ToroidalHelix one:
http://moi3d.com/forum/display.php?webtag=MOI&msg=1519.12

That's a similar type of thing. Check out the .js files there to see the script code that is plotting points at increasing parameters of a function and then it takes all those points and builds a curve out of them.

You should be able to follow the same general pattern for your case, you need to do some stuff like figure out what parameters you want to expose in the UI and stuff like that.

- Michael