| // gcc -g -Wall --std=c99 wilson.c -lpng -o wilson && ./wilson | |
| /* Generate a random spanning tree of the RGB cube, and a random | |
| spanning tree of the pixel grid, using Wilson's algorithm, then | |
| do a simultaneous breadth-first search of these trees to obtain | |
| a bijection between the RGB cube and the pixel grid. | |
| Inspired by allrgb.com. | |
| -- Robin Houston, 2014-03 |
| all: world.topo.json libs | |
| libs: d3.geo.projection.v0.min.js d3.v3.min.js topojson.v1.min.js | |
| clean: | |
| rm -f world.*.json ne_10m_admin_0_countries.* *.min.js | |
| .PHONY: all clean libs | |
| %.topo.json: %.geo.json |
Random noise at first, but leave it running for 5–10 minutes and it will slowly become more interesting.
Notionally a numerical solution of a system of differential equations, but the “checkerboard” solution is presumably an artefact of discretisation.
Suggested by Cornus Ammonis
This is a close-up view of 6cfcbff910216ee3abf8.
It is again necessary to be patient.
Click to magnify.
Based on Reaction-diffusion worms by Cornus Ammonis.
Based on Reaction-diffusion worms by Cornus Ammonis.
See also Ammonis worms in the large.
This is Cornus Ammonis’s new variant on the worms, from here. Click to magnify.
This is a Gray-Scott system, using parameters from Karl Sims: F=.0545, K=.062.
This system is described in the paper From Labyrinthine Patterns to Spiral Turbulence, Aric Hagberg and Ehud Meron, 1994. See Figure 3.
Click and drag to seed.