I'm glad turtle graphics intersected my thinking re extended precision decimals (Decimal type) on edu-sig just now.
I've updated my tmods.py to contain a turtle rendering the plane-net of a T-mod: http://www.4dsolutions.net/ocn/python/tmod.py (runnable source) http://www.flickr.com/photos/17157...@n00/4147429781/ (GUI view) Here's the graphical output: http://www.flickr.com/photos/17157...@n00/4148139184/in/photostream/ (Python 3.1) If you actually wanna fold the T, you need to snip off the cap and reverse it, per this diagram: http://www.rwgrayprojects.com/synergetics/s09/figs/f86515.html 120 of them, 60 folded left, 60 folded right, all of volume 1/24, make the volume 5 rhombic triacontahedron. http://www.rwgrayprojects.com/synergetics/s09/figs/f86419.html If you blow up the volume by 3/2, to 7.5, the radius becomes phi / sqrt(2) -- what we're showing with Decimals. The reason this seems unfamiliar is the unit of volume is the tetrahedron formed by any four equi-radiused balls in inter-tangency. I'm spinning this as Martian Math these days, yakking on math-thinking-l about it, learned it from Bucky Fuller, Dave Koski et al. Kirby _______________________________________________ Edu-sig mailing list Edu-sig@python.org http://mail.python.org/mailman/listinfo/edu-sig
