[HN Gopher] Gummy Geometry
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       Gummy Geometry
        
       Author : memalign
       Score  : 65 points
       Date   : 2026-03-13 19:31 UTC (4 days ago)
        
 (HTM) web link (newkrok.github.io)
 (TXT) w3m dump (newkrok.github.io)
        
       | jaen wrote:
       | What's the physics solver used here? This demonstration quickly
       | runs into common problems associated with overly simplistic
       | solvers/integrators where everything starts to become unstable
       | and "vibrate" / "twitch".
        
         | phil-martin wrote:
         | It's nape-js
         | 
         | https://newkrok.github.io/nape-js/index.html
         | 
         | While the gummy geometry one is a little twitchy, but most all
         | the other demos were very stable, much more than most other 2d
         | solvers I've seen.
        
       | coldcity_again wrote:
       | Bit twitchy indeed but still fun. Instantly took me back to
       | "rubber glenz vectors" in classic Amiga prods[1]
       | 
       | [1] https://www.youtube.com/watch?v=OZTnR3FpUEA&start=413
        
       | Tepix wrote:
       | It seems to be broken on Firefox. It shows 3/8 players, the
       | circles are flickering madly and I can't drag them.
        
         | NewKrok wrote:
         | Yeah, fixing that demo is on my TODO list, but for example,
         | I've implemented it a bit better here:
         | https://newkrok.com/gamer-zone/project-throttle"
        
       | jp57 wrote:
       | Because there are no instructions at all about what will happen
       | when you click, I almost immediately created a "transporter
       | accident" where I spawned in a new shape that intersected with an
       | existing shape. They became locked together, and this new
       | compound shape seems to exist as some kind of physics engine edge
       | case. It struggled madly to find a low-energy state, rolling and
       | jittering around, sometimes seeming to almost stop, and then gain
       | energy again from nowhere and start moving again.
        
         | stronglikedan wrote:
         | I made something that looked like someone in a body bag just
         | woke up and were trying to frantically find their way out. Not
         | gonna lie it wasn't _not_ a little disturbing...
        
       | NewKrok wrote:
       | Wow, didn't expect to see my implementation here :)
        
       | DANmode wrote:
       | Too much fun.
       | 
       | Feels pretty right.
        
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       (page generated 2026-03-17 23:01 UTC)