[yt-users] Load in ASCII VTK

[Lukas Bystricky]

Thanks John for your quick response. I've attached a sample file VTK file
that I have. This is from a finite difference simulation, so grids will
always be uniform.

I found the Athena source code for how they write their VTK files (
http://www.astro.princeton.edu/~jstone/Athena/doxygen/html.with_source/output__vtk_8c_source.html)
and it looks similar to mine, except that theirs is in binary and they use
a different dataset structure.

I'm an extremely new YT user (and I've never done any YT development), so I
don't know how much help I'd be but if you'd like a hand developing a new
frontend let me know.

On Sun, May 29, 2016 at 4:08 PM, John ZuHone <jzuhone at gmail.com> wrote:

> Hi Lukas,
>
> I think Nathan's point was that there are other people working on new
> frontends currently, and they are smoothing over the instructions for how
> to make a new one.
>
> Probably the best thing to do in the short run is to figure out how to
> read your data in using the Athena frontend. If you have a sample dataset
> you can post somewhere for us to try that would help.
>
> I nominally maintain the Athena frontend, but I don't have a ton of time
> at the moment, so it sort of depends on how difficult it will be to make
> the changes in terms of how long it will take. If you're up for giving it a
> shot yourself I'm happy to give you pointers.
>
> Is this uniformly gridded data, or something else?
>
> Best,
>
> John
>
>
> ================================
> John ZuHone, Chandra/ACIS Operations
> Harvard-Smithsonian Center for Astrophysics
>
> 60 Garden St., MS-67       (w) 617-496-1816
> Cambridge, MA 02138.     (m) 781-708-5004
>
> john.zuhone at cfa.harvard.edu
> http://hea-www.cfa.harvard.edu/~jzuhone
> ================================
>
> On May 29, 2016, at 3:41 PM, Lukas Bystricky <lukasbystricky at gmail.com>
> wrote:
>
> Hello all,
>
> This is a followup to my question here (
> http://lists.spacepope.org/pipermail/yt-users-spacepope.org/2016-May/007830.html).
> Apologies, but I can't seem to figure out how to reply since I was never
> sent an e-mail for either my question or Nathan's response.
>
> I'm trying to load a legacy VTK file into YT (see format description
> http://www.vtk.org/wp-content/uploads/2015/04/file-formats.pdf), but I
> when I try:
>
> ds = yt.load("file.vtk")
>
> I get the error:
>
> traceback (most recent call last):
> File "visualization.py", line 3, in <module>
> ds = yt.load("file.vtk")
> File "C:\Users\Dave\Anaconda2\lib\site-packages\yt\convenience.py", line 84, in load
> return candidates[0](*args, **kwargs)
> File
> "C:\Users\Dave\Anaconda2\lib\site-packages\yt\frontends\athena\data_structures.py",
> line 470, in __init__
> Dataset.__init__(self, filename, dataset_type,
> units_override=units_override)
> File
> "C:\Users\Dave\Anaconda2\lib\site-packages\yt\data_objects\static_output.py",
> line 190, in __init__
>     self._parse_parameter_file()
>   File
> "C:\Users\Dave\Anaconda2\lib\site-packages\yt\frontends\athena\data_structures.py",
> line 528, in _parse_parameter_file
>      self.domain_left_edge = grid['left_edge']
> KeyError: 'left_edge'
>
>
> Nathan Goldbaum pointed out is his answer that YT can read in VTK files from Athena. I looked into this and it seems like the difference between my file and Athena's files is that mine are ASCII while Athena's are binary. Is that right?
>
>
> On another note, Nathan also pointed out there are people working on a frontend for the VTK format I'm using. Could I provide any help there?
>
>
> Thanks again, and sorry for the double posting.
>
>
> Lukas
>
>
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