[yt-dev] Data access along streamlines in yt 3.x

[Matthew Turk]

Hi Will,

Thanks for your email!  I just checked, and indeed, that you can't access
them.  But, I don't think it would be terribly difficult (although likely a
bit baroque) to implement the access protocol, and I think it would be a
great addition.  I think that it would require implementing a streamline
data selector in yt/geometry/selection_routines.pyx.  The streamline path
object itself has a positions attribute, which gives the position at each
point in the streamline.  This can be accessed in the selection routine in
an implementation of select_cell.

I'd be haappy to work through this with you, if you'd like -- you can join
our slack channel (it should currently allow guests, or we can invite you)
and we can talk through this if you'd like.

-Matt

On Tue, Aug 2, 2016 at 11:40 AM, Will Barnes <wtb2 at rice.edu> wrote:

> Hi all,
>
> I was wondering if there is currently an effort to implement data access
> along streamlines in yt 3.x. The streamline documentation (
> http://yt-project.org/doc/visualizing/streamlines.html) indicates that
> this functionality is not yet available in 3.x, but seems to imply that it
> was available in previous versions (possibly 2.x?).
>
> If no one else is working on this currently, I would be interested in
> contributing to this feature. However, I am relatively new to the yt
> codebase and don’t know what level of expertise would be needed. Any
> comments/feedback would be appreciated.
>
> Thanks!
>
> Will Barnes
>
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>
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