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GDC 2013 11 Apr 2013 | 09:09 pm
This year’s physics tutorial was a lot of fun and all the speakers did a great job. We had some new speakers this year and all the presentations contained new material. You can get all the presentatio...
__m128 1 Sep 2012 | 01:28 am
The best way to use SSE is to use the __m128 intrinsic directly. Unfortunately Visual Studio displays the values backwards (w,z,y,x). Bleh. Here is a change to autoexp.dat to correct the order. First ...
Ragdolls 6 Apr 2012 | 06:13 pm
I gave a presentation this year at the Game Developer Conference on building a ragdoll system for Diablo 3. You can get it from the download page here: http://code.google.com/p/box2d/downloads/list W...
Shape Coordinates 26 Mar 2012 | 04:52 pm
Keep in mind that a shape does not know about bodies and stand apart from the dynamics system. Shapes are stored in a compact form that is optimized for size and performance. As such, shapes are not e...
Pixels 18 Dec 2011 | 03:10 pm
Box2D uses MKS (meters, kilograms, and seconds) units and radians for angles. You may have trouble working with meters because your game is expressed in terms of pixels. To deal with this in the testb...
Return of the Blog! 26 Nov 2011 | 02:10 pm
I miss having a blog. I brought down the old gphysics blog because I was having too many security troubles on godaddy. My new host has had zero security issues. Hurrah! The old Box2D site was custom...
