I'm going back to resimulate some cosmological simulations with a nested-grid setup, and can't seem to figure out how to get yt to tell me where all of the dark matter particles in a given halo start out at high redshift. It seems that something like this used to exist in the Hub (i.e.,
http://lists.spacepope.org/pipermail/yt-users-spacepope.org/2011-August/001879.html), but that is not around any more. Would somebody mind sharing such a tool if they have already coded it up?