Extra points are added to the woven torus to illustrate how the circuits
lie on an approximated surface; they come close to intersecting where they
cross.
View this model with the command
unitile2d -s t -w 8 -l 8 | poly_weave -p 0,1,0:::::::FEV | off_util -M a | off_color -f U -e F -v F | antiview -x f -v 0.1 -e 0.1
