I was playing around with particle behavior algorithms using XNA and came up with an app that's fun to play with, so I thought I'd share it. Getting code ready to post on my blog forces me to simplify it and clean it up, kind of like having to clean the...

For those interested in game development technology, it’s been a great week of product releases! Monday we saw the 1.0 release of XNA Game Studio Express . Wednesday brought the release of the December 2006 version of the DirectX SDK , which includes...

One thing that surprised me (in retrospect) about my last sample was that it doesn't make a single reference to a Matrix. All my other apps use tons of matrices. It's hard to do much in 3D graphics without them. Even if you're writing 2D programs with...