[yt-users] Mirroring Cartesian data about a plane for volume rendering

[Nathan Goldbaum]

If the mirrored dataset can fit in memory and your FLASH simulation uses
AMR, you could also try using load_amr_grids:

http://yt-project.org/doc/reference/api/generated/yt.frontends.stream.data_structures.load_amr_grids.html

It would be cool to add more official support for this, and in a way that
doesn't require loading the dataset in memory. I think it would be natural
to do in the new volume rendering API (a MirroredVolumeSource maybe?).

On Tue, Mar 15, 2016 at 11:56 AM, Daniel Fenn <dsfenn at gmail.com> wrote:

> Hi Suoqing,
>
> Thanks for the suggestion. I'll proceed along those lines.
>
> Dan
>
> 2016-03-14 17:38 GMT-04:00 Suoqing Ji <suoqing at physics.ucsb.edu>:
>
>> Hi Dan,
>>
>> I don’t think there’s a direct option of mirroring in volume rendering,
>> however this is definitely doable via other ways.
>>
>> One way I can come up with is, you could specify the region above/below
>> z=0 plane and extract fix resolution data from it (see
>> http://yt-project.org/docs/dev/cookbook/constructing_data_objects.html#extracting-fixed-resolution-data),
>> then mirror the data and pass it to volume rendering.
>>
>> Best wishes,
>> --
>> Suoqing JI
>> Ph.D Candidate
>> Department of Physics
>> University of California, Santa Barbara
>> http://web.physics.ucsb.edu/~suoqing
>>
>> On Mar 14, 2016, at 2:30 PM, Daniel Fenn <dsfenn at gmail.com> wrote:
>>
>> Hi,
>>
>> I have a 3D Cartesian FLASH dataset that I would like to mirror about the
>> z=0 plane for volume rendering. Is there a straightforward way to do this
>> in yt?
>>
>> I was unable to find any option in the volume rendering itself. My guess
>> is that I'd have to perhaps make a new array representing the data and do
>> the mirroring by appropriately copying the elements. However, I'm unsure
>> how to go about this--especially for AMR data. Does anyone know of any
>> built-in functionality that might be useful for this?
>>
>> Thanks.
>>
>> Dan
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