The DupinCyclides script can be used to make a torus, by setting c = 0.

Sweep can be used, instead of Loft or Network, to make a Dupin cyclide, or torus,
by setting the uDensity# to an odd number, say 101 or 201, and the vDensity# to 3.
Then along the x axis, select the largest circle and the smallest circle, to be swept,
with the rails the inner v circle around the hole, and the outer v perimeter circle.

- Brian

A help window checkbox may be added,
as well as a checkbox for Villarceau circles.
The "a" "c" and "mu" values should be clarified, in relation to the 4 circles mentioned in the above paragraph.