Polysurface is designed to augment pyopenscad, which is itself a python wrapper around the openscad programming language.

A list of lists of points is given to polysurface, and a 3D double-splined surface is created from the points. there is no restriction on the set of points that can be passed in as input.

The bodywork for the Ultra-efficient Hybrid EV - http://lkcl.net/ev - is entirely made using polysurface and pyopenscad.

instructions are at https://github.com/lkcl/pyopenscadspline. dependencies are: pyopenscad - https://github.com/SolidCode/SolidPython python - http://python.org openscad - http://www.openscad.org/