[yt-dev] Progress on Get_Vertex_Centered_Data for Octree data

[Matthew Turk]

Hi Tomer,

Not a lot to add, but I can outline here my thoughts on how to get
ghost zones working.  The basic idea is to add on a new ghost zone
filling routine that gets passed in the neighbors for each oct, as
well as the arrays from which they'll be filled.  This will be a lot
easier with a slight refactoring of the oct_visitors code, such that:

 * Each oct_visitor is no longer a typedef'd function, but a struct
that pseudo-inherits from a base struct.
 * OctVisitorData will be the first part of the struct, and instead of
awful void* casting, we'll use memoryviews defined in the "subclasses"
of the base struct.
 * We can then pass in memoryviews to the visitor functions, which can
include things like the full octree itself.

Once this is in place, then the ghost zones can be gotten using a
.neighbors() function, the file_ind can be grabbed from each, and the
ghost zones filled in.

On Wed, Nov 25, 2015 at 8:52 AM, Tomer Nussbaum
<tomer.nussbaum at mail.huji.ac.il> wrote:
> Hey Mark,
>
> I have done some progress on get_vertex_centred_data, with simple
> extrapolation, we can get:
> https://sketchfab.com/models/d267102434274bdbb5f75f5b9ef27b44.
>
> As you can see, this solution does not work so well, so now Matthew Turk and
> I are working on changing the parsing of the octTree to include ghostzones.
>
> It's great to have another companion to this part of the code.
> do you have a Slack account? lets talk there. (I am @tussbaum)
>
> Matt, anything to add?
>
>
> Cheers,
> Tomer
>
> On Wed, Nov 25, 2015 at 2:24 PM, Mark Richardson
> <Mark.Richardson at physics.ox.ac.uk> wrote:
>>
>> Hello,
>>   I see that the fact that Octree doesn't currently work with
>> get_vertex_centred_data had some interest recently. Tomer, have you made
>> much progress on this since early November? I'm also very interested in
>> getting this to work (I use Ramses), so if you'd like, I'd enjoy coming on
>> board and helping in what ways I can.
>>
>> To start, is there a fork I can follow on the bitbucket?
>>
>> Cheers,
>>   -Mark
>>
>> --
>>
>> Mark Richardson
>> Beecroft Postdoctoral Fellow, Department of Physics
>> Denys Wilkinson Building - 555F
>> University of Oxford
>> Mark.Richardson at physics.ox.ac.uk
>> +44 1865 280793
>
>
>
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