pouët.net

Beat balls by Archee [web]
[nfo]
screenshot added by archee on 2023-09-10 06:09:03
platform :
type :
release date : september 2023
release party : Function 2023
compo : pc 4k
ranked : 2nd
  • 18
  • 1
  • 0
popularity : 52%
 52%
  • 0.95
alltime top: #14860
added on the 2023-09-10 06:09:03 by archee archee

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This one were as we say in Sweden.. Förbannat grymt!
rulez added on the 2023-09-10 09:20:09 by MetRebelS MetRebelS
Cute
rulez added on the 2023-09-10 10:44:03 by bitl bitl
I found this funny in unexpected ways.
It's apparent that you are running your physics backwards, launching balls to be emitted at just the point in time where they should be touching on the beat, and then running all the collision physics backwards from that (after all, the individual collision process is time-symmetric).
But since your physical simulation of this many-particle system basically runs backwards in time, you've got entropy constantly decreasing in the system.
I can't quite put my finger on what it is, but I get the feeling that it *looks wrong*.
Like an intuitive sense that entropy is decreasing instead of increasing, as it should. Fun!
rulez added on the 2023-09-10 11:02:08 by urs urs
what urs said.
rulez added on the 2023-09-10 11:04:07 by dirtie dirtie
balls touching!
rulez added on the 2023-09-10 13:01:46 by post malone post malone
Quote:
I found this funny in unexpected ways.
It's apparent that you are running your physics backwards, launching balls to be emitted at just the point in time where they should be touching on the beat, and then running all the collision physics backwards from that (after all, the individual collision process is time-symmetric).
But since your physical simulation of this many-particle system basically runs backwards in time, you've got entropy constantly decreasing in the system.
I can't quite put my finger on what it is, but I get the feeling that it *looks wrong*.
Like an intuitive sense that entropy is decreasing instead of increasing, as it should. Fun!
Wrong guess. It's only simulated forwards. Your idea is interesting, though, you would still need to simulate it forward too from the drum-hit. Also notice, that some balls hit both drums or one drum twice before leaving the cage. The collisions are fully elastic, there is no change in kinetic energy. I should have made it lossy to look real.
added on the 2023-09-10 14:52:35 by archee archee
Pourquoi faire simple quand on peut faire compliqué.
All this is very confusing but it makes a lot of sense. 🙃
rulez added on the 2023-09-11 05:38:22 by Black Dragon Black Dragon
great
rulez added on the 2023-09-11 09:01:00 by Murphy Murphy
Very cool concept, Archee ! I was also thinking about the balls not slowing down due to friction or kinetic energy, but somehow I have a feeling it would have a negative effect on the sound evolution or just in the end everything would stop, I mean also a drummer needs to put some energy in his sticks all the time :-) ...or it works like a pinball, speeding up the balls again...
rulez added on the 2023-09-11 09:12:41 by Kuemmel Kuemmel
Ahh, that physics!
rulez added on the 2023-09-11 09:28:35 by tjahzi(aka Jimi) tjahzi(aka Jimi)
Good good shit, how did you solve the elastic collisions? This looks so cool.
rulez added on the 2023-09-11 09:45:49 by wrighter wrighter
Quote:
Good good shit, how did you solve the elastic collisions? This looks so cool.
Elastic collisions are pretty simple in analogue physics. as a three-way collision can't happen exactly at the same time. (this is analogue physics, for faster retries during precalc)
Code: vec2 d1 = normalize(poss[k]+vels[k]*nextcollistime[j] - (poss[j]+vels[j]*nextcollistime[j])); d1 = d1 * dot(vels[j] - vels[k], d1); vels[j] -= d1; poss[j] += d1 * nextcollistime[j]; vels[k] += d1; poss[k] -= d1 * nextcollistime[j];
added on the 2023-09-11 18:22:03 by archee archee
typical archee style. which is good =)
rulez added on the 2023-09-11 19:58:24 by HellMood HellMood
:)
rulez added on the 2023-09-11 22:33:45 by provod provod
cool
rulez added on the 2023-09-13 23:26:43 by wullon wullon
Very nice! Congrats Archee!
rulez added on the 2023-09-16 07:44:28 by tifeco tifeco
nice idea!
rulez added on the 2023-09-16 21:08:17 by frog frog
Very nice idea a pinball games machine with things that makes different sound
rulez added on the 2023-09-17 10:22:14 by Queen_Luna Queen_Luna
Cooool!
rulez added on the 2023-10-02 19:31:50 by Emod Emod
Great
rulez added on the 2023-10-21 13:11:20 by Frequent Frequent

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