An L-system is a parallel string rewriting system. A string rewriting system consists of an initial string, called the seed, and a set of rules for specifying how the symbols in a string are rewritten as (replaced by) strings.
The recursive nature of the L-system rules leads to self-similarity and thereby fractal-like forms which are easy to describe with an L-system. Plant models and natural-looking organic forms 'grow' and becomes more complex by increasing the iteration level of the form.
Following character have geometric interpretation.
| Character | Meaning |
|---|---|
| F | Move forward by line length drawing a line |
| f | Move forward by line length without drawing a line |
| + | Turn left by turning angle |
| - | Turn right by turning angle |
| | | Reverse direction (ie: turn by 180 degrees) |
| [ | Push current drawing state onto stack |
| ] | Pop current drawing state from the stack |
Change the following parameters to get different systems
| Parameters | Meaning |
|---|---|
AXIOM |
initial string |
RULES |
rewriting rule |
STARTX |
canvas starting width position |
STARTY |
canvas starting height position |
LENGTH |
step size |
ANGLE |
degree of direction change |
Then increase (or decrease) ITERATIONS to get next iteration
- Grzegorz Rozenberg and Arto Salomaa. The mathematical theory of L systems (Academic Press, New York, 1980).
- Przemysław Prusinkiewicz, Aristid Lindenmayer – The Algorithmic Beauty of Plants.
- Kari, Lila; Rozenberg, Grzegorz; Salomaa, Arto (1997). "L Systems".
Copyright © 2019 Akash Meshram.
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