L-systems in Rust

Render L-systems as SVGs using Rust and Cairo.

Some useful resources on getting started:

• https://en.wikipedia.org/wiki/L-system
• https://fedimser.github.io/l-systems.html
• https://paulbourke.net/fractals/lsys/

Usage

This tool has a command line interface:

Visualize 2D L-Systems with SVGs.

Usage: lsys [OPTIONS] --width <WIDTH> --height <HEIGHT> <AXIOM> <VARIABLES_TO_DRAW> <ANGLE> <ITERATIONS> [RULES]...

Arguments:
  <AXIOM>              Initial string
  <VARIABLES_TO_DRAW>  Variables that should be treated as a stroke and drawn
  <ANGLE>              Turn angle in degrees
  <ITERATIONS>         Number of times the rules will run
  [RULES]...           Rules for replacing characters with a new string (i.e. "F=>F+F")

Options:
      --width <WIDTH>    Width of the SVG Canvas in millimeters
      --height <HEIGHT>  Height of the SVG Canvas in millimeters
  -o, --out <FILE>       Path to write the SVG to
  -h, --help             Print help
  -V, --version          Print version

To draw four iterations of the Koch snowflake on a 100mm x 100m SVG:

cargo run --release -- --width 100 --height 100 'F++F++F' 'F' 60 4 'F=>F-F++F-F' -o out.svg

Examples

Many of the systems below come from Paul Bourke's site.

Sierpinski Triangle

Sierpinski Arrowhead

Koch Curve

Dragon Curve

Fractal Plant

Moore Curve

Hilbert Curve

Sierpinski Carpet

Koch Snowflake

Hexagonal Gosper

Kolam

Crystal

lib.rs:

A crate for visualizing 2D L-systems with SVGs.