The 30-60-90 rule reads like the automotive version of your gym telling you to "just work out three times a week." It's great advice, in theory, but you can't help thinking: Does anybody really follow ...

This file provides functions and modules that construct shapes from a list of cross sections. In the case of skin() you specify each cross sectional shape yourself, and the number of points can vary.

Some standard modules for making 3d shapes with attachment support, and function forms that produce a VNF. Also included are shortcuts cylinders in each orientation and extended versions of the ...