2D Reaction Diffusion to 3D

Here is a script replicating some of the work presented on http://toxiclibs.org/2010/02/simutils-grayscott/ especially replicating this image http://toxiclibs.org/wp-content/uploads/2010/02/typeform_square_680....

Size of patterns depends on Grid size.

Time of calculation depends on grid size, _n_steps*jumps.

Image above was done using this script and bend, taper ... from Rhino, and also modifying feed and kill rates. See http://www.karlsims.com/rd.html

Attachments:

reaction_diffusion_3d.gh, 24 KB

Replies to This Discussion

Permalink Reply by Laurent DELRIEU on March 3, 2016 at 5:09am

Hello, I haven't my PC with me at the moment. I am also quite sure not to have saved values!
I think I used these coefficients "Here are two videos that show a "mitosis" simulation (f=.0367, k=.0649) and a "coral growth" simulation (f=.0545, k=.062)." the scale of the pattern is dependent upon resolution (200 ?) and diffusion B (0.4 ?).
For the scale in z, you have to test in 2d first and see when the pattern is what you want. So you have a number of steps, say 1200 steps and if you want 200 slices in z you need to put "steps between images" to 6 (1200/200).

Permalink Reply by Giovanni DeAmbrosio on November 3, 2016 at 10:40am

Hello Laurent ! great job for your amazing work on reaction diffusion !

Permalink Reply by Henry on August 28, 2019 at 7:50pm

This is pretty awesome! I'm new to grasshopper. How do you make the model in 3D? If I change the values in the script then only the pattern red and yellow 2D plane changes

Permalink Reply by Laurent DELRIEU on August 30, 2019 at 2:23am

Please post on Discourse, this forum is dead

https://discourse.mcneel.com