Karl Sims, of course, is The Man when it comes to reaction diffusion eye candy. Try his RD tool, and click on the Example button a few times to get an idea of the visual effects it can produce.

https://www.karlsims.com/rdtool.html

He's also got a great tutorial. I relied heavily on this while writing mine.
https://www.karlsims.com/rd.html

🧵 8/N

#ReactionDiffusion #KarlSims

It runs!

It's slow though. This demo, sped up for the short attention crowd (that's you), is 1800 simulation steps per second. It uses > 60% of one CPU core. I'm certain the ESP32 will be a lot slower.

I believe I can find another factor of two through optimization.

And there's near infinite scope to make it prettier/more interesting.

🧵 7/N

#ReactionDiffusion

After two solid days of hacking, I've got a simple canvas that I can draw on. In Rust, using wgpu, running on a Mac. Now I can actually start working on reaction diffusion.

Rust calls C for the actual pixel painting. I will implement the actual R-D code in C, too, because this is ultimately going to run on an ESP32 with a touch screen. That's also why the canvas is such an odd size. 240 × 280.

🧵 6/N

#wgpu #rust #MacOS #ReactionDiffusion

@InstantArcade Hmmm. I watched that tutorial. It was good, but it didn't explain the math. Then I found Karl Sims' excellent tutorial, and I really wanted to write a reaction diffusion demo. Then I found Karl Sims' RD Tool, and it already implemented 80% of the cool ideas I had and a bunch of stuff I hadn't thought of. Darn it!

Putting it on an LED panel will still be fun, though.

#ReactionDiffusion

#generativeart #artificiallife #reactiondiffusion #blender #opencl #creativecoding #emergence #isosurface

I've just posted some new animation work please check it out
https://www.chriskeegan.co.uk/a-few-feedback-loop-pattern-experiments-using-touch-designer/
#animation #touchdesigner #reactiondiffusion

new touch designer experiments.
https://youtu.be/V9NTkMEiY2o?si=9m294vPCET1GjeJu
#touchdesigner #reactiondiffusion #turingpattern

More of the #reactiondiffusion letter treatments from the #36daysoftype entries from last year

Gonna port over some stuff from another place. These were the #36daysoftype entries for last year #reactiondiffusion

Still work in progress: debugging a reaction-diffusion compute shader for a GPU generated mesh.

#openrndr #cellforms #reactiondiffusion #gpgpu

Little clip from my video on create reaction diffusion patterns using photoshop CS6 and above, love playing with this technique #reactiondiffusion #textures https://www.youtube.com/watch?v=I6Vh_NOy70M

I wish everybody a fantastically re-generative new year 2024!

#sidefx #houdini #opencl #realtime #reactiondiffusion #3d #generativeart #mastoart #motiondesign #motiongraphics

I wish everybody a fantastically re-generative new year 2024!

#sidefx #houdini #opencl #realtime #reactiondiffusion #mastoart #3d #generativeart

Unforgettable summer evenings at the lonely Arcadia Beach, OR... 🤌

(Ps. The Giant Kelp is also a great reference for #ReactionDiffusion patterns...)

#MeerMittwoch #LandscapePhotography #NaturePhotography #Photography #Beach #Pacific #Oregon #PNW

from some jams with kevin kripper and @palomakop way back when we were in erie, pa

#videoart #videosynthesis #videofeedback #vsynth #gravity_waaaves #vse #turingpattern #reactiondiffusion #generativeart

BattleKruiser kindly gave me images of his Reaction-Diffusion Render, So I illuminated it!

https://www.youtube.com/@MisterBattleKruiser

#reactiondiffusion #refraction #codeart #collab

A "weekend project" to create wind ripples... I am fascinated by the beauty of these simple patterns created by the wind in the sand.

It's also fascinating that very simple #mathematics can create something realistic - and that it's a variant of a #reactiondiffusion process.

It turns out that this can be easily and efficiently coded in #python using #pytorch:

def wind_ripples(p):
    with torch.no_grad():
        binz = (torch.linspace(0, 1, p.bins+1), torch.linspace(0, 1, p.bins+1))

        np.random.seed(p.seed)
        pos = torch.rand(p.N_particles, 2)

        for i_step in range(p.N_step)
            pos += p.D*torch.randn(p.N_particles, 2)
            pos = pos % 1

            # https://pytorch.org/docs/stable/generated/torch.histogramdd.html
            height, edge_pos = torch.histogramdd(pos, bins=binz, density=True)

            ind_pos = torch.ceil(pos*p.bins).long() - 1
            pos[:, 1] += p.L * torch.sigmoid( - p.kappa * height[ind_pos[:, 0], ind_pos[:, 1]])

    return height.numpy()

All the code and more simulations are available at https://laurentperrinet.github.io/sciblog/posts/2023-04-16-modelling-wind-ripples.html

One of my favourite things to watch in the settling of the contents of #miso soup. It's just such a beautiful system of physics.

At the start it looks so much like a #reactiondiffusion system, the way it separates quickly into small curving blobs, and only after does it begin to settle and agglomerate further.

You can see the little temperature differentials that must exist within the soup, holding some portions up and pulling others down with the help of gravity, but as close to neutral as the contents are it's a beautiful slow process.

#reactiondiffusion butterfly!!
Made it look like some sort of album cover.
I'll also share some gamedev shenanigans later on, but this one was made along the others, and I still have more little experiments to share :ameowmelt:
#MastoArt #computerart #generativeart #NotAI

I drew a little kitti with reaction diffusion c:
#reactiondiffusion #computerart #procedural #MastoArt #art #cat