[yt-users] [YT-USERS] Incoherence when ploting a slice - from FLASH simulation

[Nathan Goldbaum]

While we fix this issue (which will hopefully be soon), here is a
workaround. I've modified your script to disable antialiasing:

import yt

ds = yt.load("lasslab_hdf5_plt_cnt_0000.hdf5")
plot = yt.SlicePlot(ds, 'z', "dens")
plot.frb.antialias = 0
plot.save()

That will avoid the artifacts until we fix this issue.

On Tue, May 2, 2017 at 4:35 PM, Nathan Goldbaum <nathan12343 at gmail.com>
wrote:

> First, thanks for the report and for sending in the dataset to reproduce
> with. I've opened an issue to track this:
>
> https://github.com/yt-project/yt/issues/1361
>
> I suspect that we're hitting a corner case bug in the code that generates
> pixelized representations of AMR data. I will try to take a closer look at
> this in the next few days.
>
> On Tue, May 2, 2017 at 4:17 PM, Gabriel RIGON <rigon.g at bureau.luli.
> polytechnique.fr> wrote:
>
>> I've uploaded the dataset: http://use.yt/upload/364c7039
>>
>> Gabriel
>>
>> ------------------------------
>> *De :* yt-users [yt-users-bounces at lists.spacepope.org] de la part de
>> Nathan Goldbaum [nathan12343 at gmail.com]
>> *Envoyé :* mardi 2 mai 2017 23:09
>> *À :* Discussion of the yt analysis package
>> *Objet :* Re: [yt-users] [YT-USERS] Incoherence when ploting a slice -
>> from FLASH simulation
>>
>> Could one of you share a dataset that exhibits this behavior?
>>
>> You can use the yt curldrop to share datasets:
>>
>> https://docs.hub.yt/services.html#curldrop
>>
>> -Nathan
>>
>> On Tue, May 2, 2017 at 4:02 PM, Scott Feister <sfeister at gmail.com> wrote:
>>
>>> Gabriel,
>>>
>>> I would like to add that I have seen this problem as well in my own
>>> usage of FLASH with yt. The streaks appear to be perfectly doubled in value
>>> relative to their neighbors. I would love to hear if anyone in the yt
>>> community has seen it and/or knows what might be going on! Note: These
>>> streaks are not in the FLASH data; VisIt reproduces the data without the
>>> streaks. Also, a yt ray output does not show the streaks; the slice plot
>>> does.
>>>
>>> Best,
>>>
>>> Scott
>>>
>>>
>>> Scott Feister, Ph.D.
>>> Postdoctoral Researcher, Flash Center for Computational Science
>>> University of Chicago, Department of Astronomy and Astrophysics
>>>
>>> On Tue, May 2, 2017 at 3:43 PM, Gabriel RIGON <
>>> rigon.g at bureau.luli.polytechnique.fr> wrote:
>>>
>>>> Dear all,
>>>>
>>>> I recently start to work with yt to analyze my FLASH simulation. The
>>>> output of those simulation is an hdf5 file.
>>>>
>>>> When I try to plot a slice of my simulation, some weird lines appear on
>>>> it. Here is an example of the python script and the results it leads to.
>>>>
>>>> """
>>>> import yt
>>>>
>>>> ds = yt.load("lasslab_hdf5_plt_cnt_0000.hdf5")
>>>> yt.SlicePlot(ds, 'z', "dens").show()
>>>>
>>>> """
>>>>
>>>> Actually they also appear went plotting the results of a frb of a slice
>>>> (even when I try to plot the x or y coordinate in 2d).
>>>>
>>>> Do you have any idea of the reason for such lines, or a solution for my
>>>> problem?
>>>>
>>>> Best regards,
>>>> Gabriel Rigon
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> yt-users mailing list
>>>> yt-users at lists.spacepope.org
>>>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>>>
>>>>
>>>
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>>>
>>
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>>
>
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