Recently, I am learning a book: "Parametric Model of RhinoScript" (2011, Wang Wen Dong, In Chinese).
In this book, some beautiful NURBS surfaces are created by RhinoScript (based on VBA).
So, based on this topic,
http://www.theswamp.org/index.php?topic=33766.msg391603#msg391603and Learned from Lee Mac's ActiveX code.
I start to write this program to make fun. And I also find k3dsurf (
http://k3dsurf.sourceforge.net/ ) and learned some definition from it.
The attached PNG is the 12 surfaces examples. (Note, some Meshes are scaled to balance the pic, and render is not included in the codes, some material and some light need to be added). I hope you like it.
Because in recent Autocad version, some NURBS functions are added, so, is it possible to generate NURBS in LISP or .NET?