lfractal's Introduction

Lfractal

(This is new react implementation, older raw version is available here)

About
Demo
Usage
Author
References
License

About

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.

Usage

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

Author

Akash Meshram

References

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".