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Etienne Werly

Etienne Werly

My personal website

Independent mathematics teacher, I teach at the moment at the University of Toulouse and as a private teacher.

Vectober22 Day 6 Bouquet

Inkscape tutorial: Bouquet

Today's submission got me to think about plants, and fiddling around with Inkscape I got the idea to use the L-systems extension, a nifty tool for procedural drawing.

Imaginary plantsgenerated with L-systems, as on a cyanotype impress

Inspiration

When I settled on using L-systems to generate plants, I first wanted to draw some kind of dry flower bouquet with lots of grassy plants. However, I got too clustered results and no really nice volumes. And the file was getting bigger, owing to lots and lots of nodes...

That's when I got the idea of drawing a herbarium, with only a few selected plants. Additionally, this fitted well with L-systems: a way of generating plant-like figures developed by the 20th-century hungarian biologist and botanist Aristid Lindenmayer.

After looking for old herbarium photos, I remembered the work of Anna Atkins, a 19th-century English botanist who was the first person to publish a photographic herbarium, Photographs of British Algae: Cyanotype Impressions using the cyanotype technique (a photography technique that involves a deep prussian blue tint).

Techniques

L-systems

L-systems, or Lindenmayer systems denote a syntax to generate a sequence of instruction that can be used to derive drawings that share many resemblance to plants.

In Inkscape, they are accessible by Extensions -> Render -> Lindenmayer System. A popup appears, and you have to select:

  • an axiom: an initial instruction from which the plant will grow (a seed),
  • some rules: this is the meat of the system. Here, you define how the plant will grow generation after generation,
  • some parameters: the number of generations, angles, length etc.

L-systems are very easy to set and produce really nice results! As I wanted to add some kind of scientific description of the plants, I have plainly written my parameters under each plant. This couldn't be easier!

Some additional resources:

  • Wikipedia of course.
  • A French site that explains it very clearly (if French is clear to you...).
  • Plenty of examples online, just look for images under "l system plant examples"...

Link to the svg

The svg file is here