Bezier Woes

Hi all,

I am trying to figure out how I can take a 3D surface and extrude it into a volume, along an arbitrary path.

I think I need to do this using bezier curves. I have already figured out that I can make surfaces that look like whatever I want, but I cannot figure out how to extrude these into volumes.

Can anyone help me?

Also, does anyone know of a tool that can take a standard parametric (or other) equation, and automatically convert it into a sequence of bezier curves?



Try this: