Elm – fun with L-System (Part 7)

Yan Cui

I help clients go faster for less using serverless technologies.

Series:

  1. Algae
  2. Pythago­ras Tree
  3. Can­tor Dust
  4. Koch Curve
  5. Sier­pin­ski Triangle
  6. Dragon Curve
  7. Frac­tal Plant (this)

Last time out we imple­mented the Dragon Curve exam­ple from the L-System wikipedia page. Now, we’re finally at the end of our journey, let’s see how we can implement the Fractal Plant example in Elm.

 

Example 7 : Fractal Plant

Let’s start by defining our L-System:

image

What’s interesting about the Fractal Plant is that it combines elements from Pythagoras Tree (the use of a stack) and other L-Systems we looked at recently.

image

 

Here’s how it looks, by gen 7 the plant looks pretty good!

fractal_plant

 

In fact, with the implementation we ended up with, we can use it to support any number of L-Systems so long:

  • ‘F’ is the only symbol that means “draw forward”
  • we can programmatically change the angle for ‘–’ and ‘+’ (easy!)

with that, let’s take a couple of the examples from LSystemBot’s tweets and see them in action!

 

Example 7.1

image

 

l-system-bot-01

 

Example 7.2

image

l-system-bot-02

 

Example 7.3

image

l-system-bot-03

 

So that’s it guys, hope you’ve enjoyed this series! Please let me know via the comments if you like to see more mini-series like this one.

 

Live Demo (here)

Use LEFT and RIGHT arrow keys to evolve/devolve the L-System.

Source Code (here)

 

 

Links


 

Whenever you’re ready, here are 4 ways I can help you:

  1. If you want a one-stop shop to help you quickly level up your serverless skills, you should check out my Production-Ready Serverless workshop. Over 20 AWS Heroes & Community Builders have passed through this workshop, plus 1000+ students from the likes of AWS, LEGO, Booking, HBO and Siemens.
  2. If you want to learn how to test serverless applications without all the pain and hassle, you should check out my latest course, Testing Serverless Architectures.
  3. If you’re a manager or founder and want to help your team move faster and build better software, then check out my consulting services.
  4. If you just want to hang out, talk serverless, or ask for help, then you should join my FREE Community.

 


Leave a Comment

Your email address will not be published. Required fields are marked *