CGAL users discussion list

["Max" <>]

Hello Sam,

>The OpenNURBS package has a lot of classes for dealing with NURBS curves
>and surfaces, download the Rhino 4.0 SR2 C++ SDK and check out the
>functions that are solely part of OpenNURBS. For example, ON_Curve and
>ON_Surface are classes dealing with curves and surfaces, and they
>already have a lot of functions built-in for manipulation and
>evaluation.So you can use it to create and store the NURBS curves and
>surfaces in 3DM format, and in case you develop a Rhino plugin, you
>would be using the same functions to manipulate those objects. This
>library is free to use and redistribute.
>But to get solid modelling type of functions with a UI to display
>objects, and other more sophisticated algorithms (ie., offset surface),
>you need to use Rhino's SDK to build a plugin for Rhino. To answer your
>question, Rhino's SDK is free to download and use, but with it you build
>a plugin for Rhino and to get the full version of Rhino you have to pay.
>But Rhino's evaluation version is free and full featured and allows you
>to develop plugins, except that you cannot save the models you create
>more than x times.
>Hope this helps.

Thanks for your detailed reply. 
I'll have a closer look into ON and check out the Rhino web site 
for more information.

B/Rgds
Max