Quick Tip 4: Attracting particles by neighboring particles using P Pass AB node

Preview

Tutorial

(No audio)
Not so quick tips with some basic theory and simple xpresso using P Pass AB node.
Scene: dl.dropbox.com/u/15988061/stuff/ppassab.c4d
Btw, you could use PRepulse&Bounce node. It works fine, but it has less controls that mine setup.