Reaction-Diffusion Code

examples
#1

Reaction-Diffusion Systems
http://en.wikipedia.org/wiki/Reaction-diffusion
Two chemicals react to each other (autocatalytic reaction) and diffuse at different speeds > patterns emerge. Simulated as a cellular automata.

see http://www.evsc.net/projects/reaction-diffusion

Instructions
draw with the mouse on the screen to activate the chemicals.

change parameters in setup() to achieve different patterns

diffA … diffusion rate for chemical A
diffB … diffusion rate for chemical B
vDiffA … vary diffusion parameter for chemical A over x-axis
vDiffB … vary diffusion parameter for chemical B over y-axis
speed … reaction speed
vSpeed … vary reaction speed over y-axis
Alpha … growth constant
vAlpha … vary growth constant over x-axis
betaMean … mean decay parameter
betaNoise … noise in decay parameter
vNoise … vary noise over y-axis

key commands

r … start/stop simulation
x … clear screen and reset
c … init chemical with small square in center (for symmetrical patterns)
b … blur pixels
n … display as black/white bitmap (use blur+bitmap for bolder line patterns)
p … capture image
f … toggle fullscreen

done with v0.06

http://vimeo.com/4519153

rdPattern.zip

#2

Looks great. Love your blog too.

JGL

#3

very interesting, thx for sharing.

#4

Nice, I’ve actually been trying to simulate this with cellular automata, but didn’t know how. So please can you tell me how I can do this myself?

#5

Great

#6

Thanks for sharing this! To @evsc i’ve seen your web pages… awesome works! :smiley:
Do you think it is possible make this in GLSL code?

#7

[quote author=“kalwalt”]Thanks for sharing this! To @evsc i’ve seen your web pages… awesome works! :smiley:
Do you think it is possible make this in GLSL code?[/quote]

Thanks!!

I am sure it’s possible. But i am not really a GLSL expert. Somehow never found the time and/or project to really dig into it. Shame, yes.

Why don’t you give it a try?

#8

Thanks!!

I am sure it’s possible. But i am not really a GLSL expert. Somehow never found the time and/or project to really dig into it. Shame, yes.

Why don’t you give it a try?

i have bought the OpenGL library books for doing this and for other idea also. i’d like to use OpenCL (but i’have to bought a new pc…). Me too i m not a GLSL expert. I’m not a developer (self made developer…!!), I’m studing Sculpture(the master course) at Academy of fine arts in Bologna. but i m interested in interactivity and i like to use different media for my expression.Probably you will found in the next time some my post about CA in GLSL ! :slight_smile:
see you
cheers

#9

Hey Eva, Thanks for sharing this, looks gorgeous! … But the file link is dead… do you still have the code somewhere around ?

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