Message #3749

From: Roice Nelson <roice3@gmail.com>
Subject: minor, but fun MagicTile enhancements
Date: Mon, 03 Jul 2017 14:47:32 -0500

Hi folks,

I added a few small features to MagicTile for an upcoming talk and thought
I’d point them out.

There are now two more models of hyperbolic geometry, the upper half plane
and the orthographic. The first is another common conformal model and
should have been added a long time ago! The second stretches out the disk
<https://plus.google.com/+RoiceNelson/posts/ESxR6WRvS9z> into a full-plane
model of hyperbolic geometry where geodesics are half-hyperbolas. Both are
quite fun to drag around and will be nice models for solving puzzles. I
had never experienced interactivity with the upper half plane model
before. I made a quick video <https://youtu.be/VYiCo2pbg5w> showing them
in motion.

The other feature I added was a way to view the view the Coxeter complex
<https://johncarlosbaez.wordpress.com/2012/05/21/symmetry-and-the-fourth-dimension-part-1/>
for
each tiling. To see this, click the new menu items next to the existing
"Tiling" items.

Cheers,
Roice