In this tutorial we cover the technique I developed in Xpresso to lock particles to one axis or another, but only one per particle. This isn't a new technique, it's not original either. I have no idea where I had seen it before but I know there are others that have done it.
This is my approach. I hope it helps you.
Make sure to check out the blog for more tutorials: http://www.thinkparticle.com
Also make sure to check out the TP Toolkit to get started with Thinking Particles in a more creatively friendly approach: http://thinkparticle.com/shop/think-p...
Email me at [email protected] or catch me on twitter @Samwelkertv if you have questions!