[eltfirpy] Ant on polyhedron

Create an interactive simulation of an ant walking between nodes along edges of a polyhedron.  This should be easy.  Walking along an edge, the program reports the names of faces to the left and right.  Add a geometric component (so not just walking along a graph) by reporting lengths, dihedral angles, and vertex angles.

This ant's-eye view is intended to contrast with the bird's-eye view in which polyhedra are typically depicted.  The ant's-eye view avoids confusion in complicated self-intersecting concave star polyhedra.

Might also be useful for abstract polyhedra, though with less geometry.