Sat, Jan 6, 2018
In my previous post, I explored generating hyperbolic, euclidean and spherical tilings using circle inversions. While it produced interesting pictures and animations, I wasn’t able to derive a formula to generate particular tilings. There’s another way to generate tilings that admits a beautifully simple unification of the three geometries. We will need a bit more machinery, but the result is interesting and approaches the problem in a different way. This post is based nearly entirely on Knighty’s shader with some help from notes the author left on fractalforums.

Wed, Apr 12, 2017
In a previous post, I talked about generating interesting pictures by iterated folding operations. In this post I’m going to use another type of fold to draw both hyperbolic and spherical tilings. If you are already familiar with hyperbolic geometry and tilings, skip the next few paragraphs! There’s code down at the bottom.
In order to simplify what we’re talking about, we can limit ourselves to tilings of right-angled triangles. In the Euclidean plane, there are two ways to tile the plane this way.

Sat, Dec 31, 2016
I’ve been fascinated by M.C. Escher’s “Square Limit” print for a while. In the hopes of understanding it better I decided to try to generate my own square limit images.

Tue, May 17, 2016
When I was researching Droste images for a previous post, I occasionally came across versions which depicted multiple spirals, rather than the ordinary single spiral. This led me down a rabbit hole to understand what is actually going on in these images, and to see what I could make with the effect.

Wed, Apr 27, 2016
The slit-scan effect is a classic analog special effect used in the “Stargate” sequence in 2001: A Space Odyssey, and a title sequence in Doctor Who. It turns out this effect is easy to implement, and the transformation can be done in only a few lines of code.

Mon, Apr 25, 2016
The Droste effect is a name given to pictures that contain themselves, like an infinite series of nesting dolls. The conventional Droste effect is interesting, but it was taken to new heights by M.C. Escher’s “Print Gallery.” I wanted to understand how Escher’s Print Gallery effect actually worked, and implement it myself.