snowglobe
snowglobe generates random snowflakes using iterated
function systems via OpenGL texture feedback. The
snowflakes interact in a particle system.
Keyboard controls:
f, F11: toggle full screen
shift-R: toggle recording PPM images to stdout
shift-S: toggle recording PGM images of each
generated flake to the current working directory
any other key: quit
Blog posts:
http://mathr.co.uk/blog/2012-01-12_snowglobe.html
http://mathr.co.uk/blog/2014-12-19_making_seasonal_cards_with_snowglobe.html
