JavaScript Physics Engine (opens in new tab)

(code.google.com)

140 pointsbauchidgw14y ago22 comments

22 comments

18 comments · 6 top-level

pacomerh14y ago· 5 in thread

Cool, how is this diferent from http://box2d-js.sourceforge.net/

palish14y ago

Well... its demo is way cooler, for one. =)

Seriously, I'm having way too much fun swinging this ball around and smashing things. Package it up for $0.99 IMO.

Huzzah! http://imageshack.us/f/839/towerofpower.jpg/

Mithrandir14y ago

Here's a more permanent home for it. http://www.atomitware.tk/games/box2dwebdemo.html

abcdefghz14y ago

http://desmond.imageshack.us/Himg94/scaled.php?server=94&...

jianshen14y ago

In the project, it says box2d-js.sf isn't being updated anymore. Would've been nice to take over the older project so people who were using that one would know there was renewed interest in maintaining this code.

pacomerh14y ago

hopefully this one keeps active looks very good

progolferyo14y ago· 3 in thread

The performance of the demo is awesome. Has anyone tried to do anything more complicated and tested performance. Would be fun to make a js game from this.

AshleysBrain14y ago

TBH it's a small demo - I've heard while JS engines these days are fast, they still struggle with complex physics simulations. I can't see any performance details/improvements noted in this release - anyone got figures?

MrNibbles14y ago

Untrue, I used a port of Box2d (not this port, our own version) to build an "HTML5" game for sony, see link - http://www.youtube.com/watch?v=AicnuLQxHoQ

Unfortunately the game was taken down due to the Japan situation. Understandable.

Under Safari i was able to simulate ~80 live physics objects in a high collision environment at full frame render, bound to the DOM at 60fps on reasonable hardware 6 months ago (safari still has the fastest DOM paint time out there now).

Even when using Firefox 3.6 i could manage around 20 dynamic objects.

No CSS3 animation, just math and re-paints.

Javascript Math is not slow (at all), its generally the DOM/Canvas slowing you down.

2 more replies

bermanoid14y ago

It's also worth checking out GWTBox2d, which is actually Java code run through GWT, and runs surprisingly well: http://gwtbox2d.appspot.com/

I'm really impressed with what JS can do these days...

fuzzythinker14y ago· 2 in thread

I open sourced my "toy" version of JavaScript physics engine just few days ago too. It's not really for serious work, but may be (hopefully) simple and good enough for beginning programmers to learn one way of starting such a project. https://github.com/fuzzthink/SPE.js

aubergene14y ago

It looks good. Have you tested it with SVG? I've been using https://github.com/hrj/box2d-js

fuzzythinker14y ago

Thanks! No, haven't had the time to do an SVG demo, but that shouldn't stop anyone from doing so ;) Thanks for the link, didn't know about jquery.svg, maybe I'll play around with that if I find the time or no one builds one already.

wrs14y ago· 1 in thread

Very nice, but where is this alleged AS3 to JavaScript converter? That sounds quite useful!

mortenjorck14y ago

I've been (very) slowly porting an AS3 site to JS/jQ, mostly as a learning experience, but I'd be quite interested in this as well.

chrisdew14y ago· 1 in thread

It's really flickery in Ubuntu 10.10 / Chrome/

enoren14y ago

FYI, I am on 11.04 / Chrome and do not see any flicker

paulirish14y ago

All the physics engines in JS are documented on the very valuable JSWiki: https://github.com/bebraw/jswiki/wiki/Physics-libraries

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