[yt-dev] Dealing with overlapping grids in Athena data

[John ZuHone]

Hi Matt,

> Thanks for sending this.  My reading is that essentially the problem
> is that Athena grids at level L=N can span multiple parent grids at
> level L=N-1, but in the *union* of their parent grids they are
> fully-contained.  If that's so, it mirrors how Orion/Boxlib operates,
> and yt does support this behavior.

Oh, I wasn't aware of this--so that's good. 

> I believe it may be as simple as converting Parent on the AMRGridPatch
> object to be a list rather than a single object.  The Orion frontend
> manages this, although in my "boxlib" bookmark I have cleaned up the
> logic somewhat in yt/frontends/boxlib/ to make it easier to follow how
> to do this.
> 
> Does that sound workable?

Yes, it does. I can have a look and work on it if you point me in the right direction. By the way, what about the parent/child relationship construction? Where is it done, if not in the frontend? Is there some kind of fallback somewhere?

Best,

John