Pxlink: Obsidian: [[17-01-01-Modeling_Foliage]] [[14-01-01-Procedural]] [[17-01-01-SpeedTree]]
Turtle commands
Move and Rot (d0L)
F |
Move forward a step, drawing a line connecting the previous position to the new position. |
f |
Move forward without drawing. |
+ - |
Rotate right / left 90 degrees. |
[] |
Branch |
Parameters
F(l,w,s,d) - l - distance / w - width / s - cross sections divisions (rows) / d - divisions (columns)
Direction and branches (bracketed systems)
F+(45)F - change direction
F[+F]F[+F][-F] - branching
Rewriting
A - Init
A=F+A- Rule
3d
&, ^ |
pitch up , pitch down |
\\, / |
roll clockwise, counter-clockwise |
~ |
Random |
" |
Step size scale. command makes the F commands half length in each generation, which makes the branches shrink further out. |
; |
Angle |
T |
Gravity |
J,K |
Leaf |
stochastic systems (to add divergence using probabilities; parametric systems (using conditions
context sensitive systems two-rule system will take twice as many generations to produce the same result.
COPY TO POINTS : https://youtu.be/4krEG2rK5iA?t=1090
Recursive fractals
recursively replacing an initial state
Koch snowflake
- Angle = 60
- Premise
F++F++F - Rule 1
F = F-F++F-F
Sierpinski triangle
- Angle = 60
- Premise
F--G--G - Rule 1
F = F--G++F++G--F - Rule 2
G = GG
https://qiita.com/procedural_design/items/a27b38e862bcfcb2f09e
https://www.sidefx.com/docs/houdini/nodes/sop/lsystem.html
http://www.motionesque.com/beautyoffractals/
https://www.toadstorm.com/blog/?p=214