Takes a regular polygon and revolve it about an axis exterior to the polygon, creating a toroidal solid, while rotating the polygon about its center as it revolves.

Customizable, so you can change:

• number of polygon sides 'N_gon'
• number of twists 'Twist' per ring rotation
• Ring and polygon diameter
• Thickness (for Möbius Strip only)
• angular section to print
• Rotation orientation of polygon
• Internal thorical hole (if any + diameter)

Some examples: mobius_polygon(N_gon=n,Twist= 0) is just a non-twisted ring (toroid) with an n-gonal cross-section and approaches a torus as n goes to infinity. mobius_polygon(2,1/2) is the classic Mobius strip. mobius_polygon(6,6), has n-surfaces and n-eges, all identical, spiraling around each other.

Inspired by http://twistypuzzles.com/forum/viewtopic.php?f=7&t=27711&hilit=mobius and the remixed source by kitwallace!

Todo list:

• DONE: add option to print just a slice => implemented mypie() *DONE made a bit faster using children()
• DONE: added smoothness by hulling every 2 items.
• ... (comment if you have suggestions)
• DONE: Published some STL derivatives