Pretty self-explanatory. This added function would let you make truncations at every vertex of the polyhedron on the screen. The truncation-plane would be perpendicular to a line between the polyhedron's center, and the vertex in question. Truncation "depth" being at the control of the user might be...

Hi, Checking those links, above, to posts I made long ago on my blog, I found I did include a description of how I made at least one of these symmetrohedra, using Stella . You can find this description in this post: https://robertlovespi.wordpress.com/2013/11/29/a-bowtie-polyhedron-featuring-regular...