The block pessary was a wooden cube with concave sides. The theory was that, with a bit of luck and a lot of rummaging around, one of the concave surfaces would fit over the cervix. The device was ...

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 ...

This file includes redefinitions of the core modules to work with attachment, and functional forms of those modules that produce paths. You can create regular polygons with optional rounded corners ...