[HN Gopher] Mitosis in the Gray-Scott model: writing shader-base...
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       Mitosis in the Gray-Scott model: writing shader-based chemical
       simulations
        
       Author : thunderbong
       Score  : 57 points
       Date   : 2024-09-20 17:22 UTC (5 hours ago)
        
 (HTM) web link (pierre-couy.dev)
 (TXT) w3m dump (pierre-couy.dev)
        
       | pcouy wrote:
       | Hey! I'm the author of this article and just noticed the huge
       | traffic spike.
       | 
       | This was my first time writing a shader. I was just playing
       | around on shadertoy when I realized I could implement this
       | chemical model that has fascinated me for quite some time. I'm
       | really happy with how well my results align with results from
       | other people who have done this before me.
       | 
       | While writing the article, I noticed that the same kind of shader
       | implementation has already been done before.
       | 
       | Feel free to ask me anything about the implementation or the
       | chemical model
        
         | davedx wrote:
         | I considered trying to do something like this for CFD
         | (specifically to see if I could show how lift is created by
         | airflow over an airfoil). I got kind of stuck on it though and
         | gave up, too far out of my area. Awesome to see others doing
         | things like this though, feels like it's an area ripe for
         | exploitation!
        
         | DylanSp wrote:
         | This is really cool, it looks like it's pretty easy to get
         | started with Shadertoy and your guidance.
         | 
         | One nitpick: in section 2.1.1 on implementing the reactions,
         | you refer to "simulating the reaction A + 2B -> C"; should this
         | have "4C"?
        
         | ryanartecona wrote:
         | This reminds me of this other work[1], which is also a
         | fascinating example of emergence from a dynamical system.
         | Instead of a chemical reaction model, it's a model of slime
         | mold growth, as a system of particles and some update rules.
         | They haven't posted new work in a while, but you can still see
         | many video renderings on their twitter[2] using variants of it
         | that are absolutely mesmerizing.
         | 
         | [1] "Physarum" by Sage Jenson
         | https://cargocollective.com/sagejenson/physarum
         | 
         | [2] https://x.com/mxsage
        
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