LPLANTS 0.2.3
This is the Lindenmayer interpreter LPLANTS (Lindenmayer-plants).
You can generate beautiful pictures of plants with it.
It reads a input file with L-system description and
output postscript (2D, but 3D internally) and POVRAY files.
Future versions will export VRML and other formats
and generate complete landscapes.
You can use it for generate background pictures, textures, 3D-scenes etc.
Send your favourite L-system and image to me for the LPLANTS galery.
newest version at:
http:altmark.nat.uni-magdeburg.de/~jschulen/lplants/index.html
format of input file:
;
; The format could be changed until 1.0 version is reached.
; I try to find most simple (in interpretation and syntax)
; but maximum flexible syntax.
; initialisation can be done by start rule! (6 setlen)
;
; This is a simple L-system example 1.26!
;
camera= 0 300 400 0 300 0 ; location and look_at
startpos= 0 0 0 ; start position (x y z)
angle= 18 ; unit angle (0..360 degrees) unitlen= 7 ; unit length depth= 5 ; be careful! time=depth^6
color= 1 0 100 0 10 20 10 ; idx=1 red=0..10 green=100..120 blue=0..10
; list of rules (do not add spaces):
S -> +++++1; start necessary!
1 -> 2+[1+5]--//[--4]2[++4]-[15]++15; leaf ansatz
2 -> F3[//&&4][//^^4]F3; shaft f=1
3 -> 3F3; grow
4 -> ["{+f-ff-f+|+f-ff-f}]; leaf f=2
5 -> [&&&6"/7////7////7////7////7]; blossom
6 -> FF; stamp f=1
7 -> ["^F][""{&&&&-f+f|-f+f}]; S+B-leaf f=3,4
; -------------------- end ----------------------------------
; ; seperates comments
; -> L-rule (do not forget a space before and after "->"!)
; +- turtle z-rotation (turn left/right, used in 2D plants)
; /\ turtle x-rotation (roll right/left)
; ^& turtle y-rotation (pitch up/down)
; | turtle 180deg-turn equal to (180)+
; [] subtree (store/restore or push/pop turtle state)
; {} start/finish drawing a polygon
; . add a vertex to the current polygon
; " color col++ (1..15)
; ! line thickness ld-- (0..255)
; LRF forward with drawing (x-direction)
; lrf forward without drawing
; () calculate expression between brackets (forth like postfix notation)
; used as parameter for next turtle-command ; no nesting possible, (30)+ and (30)- give same result ; THIS WILL BE EXTENDED IN FUTURE TO POSTFIX SYNTAX ( 5 age + ).
; 1..9A..Za..z usable for substitution rules
; S start rule
X 70 -> F+ ; probability, replace X by F+ if random(100)<70, default=100
; g gravity: rotate downwards (DOES NOT WORK!)
; G forward without storing polygon vertex
;
; turtle-coordinates: x=forward, y=left, z=above
; turtle-start: x and y correspond to the screen coordinates
;
Send comments and bug reports to jschulen@gmx.de.
Have fun!