IDidibidiart·Jun 27, 2017
Here is a physics based animation framework:
https://github.com/kripken/box2d.js/
In Show HN: YapAnimator – Fast and friendly physics-based animatorkripken
box2d.js
C2012–2017
kripken / box2d.js
box2d.js
Port of Box2D to JavaScript using Emscripten
3Distinct people
5Mentions
1Explicit recommenders
1.4KGitHub stars
What to know before exploring
What it is
Port of Box2D to JavaScript using Emscripten
GitHub
Where it is used
No documented product use has been verified yet.
What people are saying
I love that you kept the tried and true Box2D API as that'll make porting what I'm working on much easier. I've been using the emscripten version [1] but the automatic port…
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 3:03:16 PM UTC.
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Mentions over time
HN mentions by year5 dated mentions
Observed mentions: 2012-11-15 22:37:07 UTC to 2017-06-27 16:41:10 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| 2012 | 2012-01-01 00:00:00 UTC | 2013-01-01 00:00:00 UTC | 2 | 0 | 2 |
| 2013 | 2013-01-01 00:00:00 UTC | 2014-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2014 | 2014-01-01 00:00:00 UTC | 2015-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2015 | 2015-01-01 00:00:00 UTC | 2016-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2016 | 2016-01-01 00:00:00 UTC | 2017-01-01 00:00:00 UTC | 0 | 0 | 0 |
| 2017 | 2017-01-01 00:00:00 UTC | 2018-01-01 00:00:00 UTC | 3 | 0 | 3 |
What Hacker News says
5 sourcesOne advantage is that the planck [1] is over 4x smaller than the emscripten build [2].
[1]: https://github.com/shakiba/planck.js/blob/master/dist/planck...
[2]: https://github.com/kripken/box2d.js/blob/master/build/Box2D_...
In Planck.js – JavaScript rewrite of Box2D physics libraryI love that you kept the tried and true Box2D API as that'll make porting what I'm working on much easier. I've been using the emscripten version [1] but the automatic port from C++ makes the JS API quite painful at times, especially with the manual memory management that's required to prevent leaks. Thanks for doing this!
[1]: https://github.com/kripken/box2d.js
In Planck.js – JavaScript rewrite of Box2D physics libraryHow about box2d via Emscripten? https://github.com/kripken/box2d.js/
In general I agree with your assessment though.
In Make a simple HTML5 game using Box2d in JavaScriptI'm using box2d (there are at least three box2d javascript implementations; the most impressive is the emscripten port from the actual C++ code: https://github.com/kripken/box2d.js but I'm using an older one for this). I wanted to prototype a simple balancing robot controller, and I hacked this up on the bus to work earlier this week in fact: http://www.a1k0n.net/code/balance.html Click to drop junk.
(Sorry, this is totally off-topic, but...)
It's surprisingly easy to make a segway-like balancing robot with perfect sensors. My plan is to add noise in the sensors and limited motor torque, etc. Ideally it would estimate its own kinematic parameters and do an A* search for approximate optimal control.
In Physics in Javascript Using Box2D