Star torus

A torus with a star-shaped medial structure.

Here is a schematic of its medial axis. The seams are represented by straight lines.

The symmetry makes this example challenging for a continuous algorithm. The medial axis has several degenerate junctions, shown in red.

You can see that six short seams are missing. These are the seams with two degenerate endpoints. The current implementation can trace only the seams with zero or one degenerate endpoints.

Tim Culver
Last modified: Mon Aug 28 10:57:49 EDT 2000