Fernery 🌿

A CLI tool for generating images of ferns and other Iterated Function Systems.

Getting Started

Install stack, then:

git clone [email protected]:TheTeaCat/fernery.git
cd fernery
stack build
stack exec fernery-exe

This should generate an image of a Barnsley fern at ./fern.png by default, with colours reminiscent of an Anna Atkins cyanotype.

Various options are available to customise the appearance of the ferns. To see the supported options, do:

stack exec -- fernery-exe --help

Example Images

This list of examples is currently exhaustive of the IFSs provided in Fernery, but I'd love to see more added to this little CLI tool. PRs are welcome! 🧑‍🎨

• Barnsley Fern
• Leptosporangiate Fern
• Thelypteridaceae Fern
• The Sierpinski Gasket
• The Heighway Dragon
• DavidLDewey Fractal

Barnsley Fern

stack exec -- fernery-exe -f barnsley

Leptosporangiate Fern

The transforms used in this fern were found here.

stack exec -- fernery-exe -f leptosporangiate -s '(210, -160)'

Thelypteridaceae Fern

The transforms used in this fern were found here.

stack exec -- fernery-exe -f thelypteridaceae -s '(-210, 125)'

The Sierpinski Gasket

stack exec -- fernery-exe -f sierpinskiGasket -o '(500,1000)' -s '(500,500)' -c 'PixelRGB8 0 0 0' -b 'PixelRGB8 255 255 255'

The Heighway Dragon

stack exec -- fernery-exe -f heighwayDragon -o '(250,400)' -d '(1000, 800)' -s '(500,500)' -c 'PixelRGB8 0 0 0' -b 'PixelRGB8 255 255 255' -i 10000000

DavidLDewey Fractal

The transforms used to generate this fractal are from an old worksheet authored by David L. Dewey which can be found here.

stack exec -- fernery-exe -f davidLDewey -s '(3,3)' -o '(850,500)' -d '(1700,1000)' -b 'PixelRGB8 255 255 255' -c 'PixelRGB8 0 0 0'