lsystem

L-System Fractal Generator

This program was inspired by FractInt pictures and written by me in 2008. Current version (2021) was rewritten in C language and stripped of old/unused/broken code.

build

$ cmake ${source-dir}
$ make

run

$ lsystem -f ${source-dir}/fractals/snoppy.ls
  ....
building Snow.Flake.2
  using order 4
  lsystem done
  turtle done
  normilize done
  saving done
building Snow.Flake.3
  using order 5
  lsystem done
  turtle done
  normilize done
  saving done
building Snow.Flake.4
  using order 12
  lsystem done
  turtle done
  normilize done
  saving done
building Twelve.Stones
  using order 27
  lsystem done
  turtle done
  normilize done
  saving done

syntax

fractal_name { fractal_description }

Fractal with name 'fractal_name' will be saved to 'fractal_name.png'.

Fractal description parameters:

name	description
alpha	initial angle
theta	angle increment in radians
angle	angle increment in degree
axiom	sets axiom
+ or -	increment or decrement angle on theta radians
!	swaps + and -
[ and ]	branch
F or D	draw forward
G or M.	skip forward
Cnumber	sets current color to number
>number	increases color by number
<number	decreases color by number

\number	increases angle by number degree
/number	decreases angle by number degree
@number	multiplies step by number
@qnumber	multiplies step by square root of number
@lnumber	divides step by number
@lqnumber	divides step by square root of number
@qlnumber	divides step by square root of number
;	comment
;order number	sets order of current fractal to number

Fractal description examples

Koch2 { ; Adrian Mariano
; from The Fractal Geometry of Nature by Mandelbrot
  Angle 12
  Axiom F---F---F---F
  F=-F+++F---F+
  }

Koch3 { ; Adrian Mariano
; from The Fractal Geometry of Nature by Mandelbrot
  Angle 4
  Axiom F-F-F-F
  F=F-F+F+FF-F-F+F
  }