[yt-users] Rendering non-cubical volumes

[Chris Beaumont]

Thanks, Nathan. That does the trick

cheers,
chris


On Tue, Jun 4, 2013 at 3:10 PM, Nathan Goldbaum <nathan12343 at gmail.com>wrote:

> Hi Chris,
>
> You can set the aspect ratio of your volume via the bbox keyword for
> load_uniform_grid.  See the example in load_uniform_grid's docstrings:
>
> bbox : array_like (xdim:zdim, LE:RE), optional
>       Size of computational domain in units sim_unit_to_cm
>
> >>> arr = np.random.random((128, 128, 129))
> >>> data = dict(Density = arr)
> >>> bbox = np.array([[0., 1.0], [-1.5, 1.5], [1.0, 2.5]])
> >>> pf = load_uniform_grid(data, arr.shape, 3.08e24, bbox=bbox, nprocs=12)
>
> I'm not sure whether the volume renderer will use non-cubic voxels, but
> this should be an easy thing to modify and double check on your end.
>
> Cheers,
>
> Nathan
>
>
>
> On Tue, Jun 4, 2013 at 11:59 AM, Chris Beaumont <cnb4ster at gmail.com>wrote:
>
>> Hi,
>>
>> I'm new to yt and this list, so I apologize if this question has been
>> answered before.
>>
>> I'm trying to render a non-cubical volume (observational data: see an
>> early attempt at https://vimeo.com/67421373). If I supply a scalar
>> "resolution" to Camera.__init__, the output is a square, even though the
>> input data is ~2x wider than it is tall. If I supply a tuple of values, I
>> can manually stretch the image but, as you can tell from the movie, I want
>> to spin around the volume. I don't think that messing with resolution will
>> help me in this case, since the projected aspect ratio of the plot changes
>> at each rotation step.
>>
>> I did find an old thread similar to this (
>> http://lists.spacepope.org/pipermail/yt-users-spacepope.org/2012-July/002793.html),
>> but the recipe there seem specific to axis-aligned slices, and not generic
>> rotations.
>>
>> Is there a natural way to force yt to render pixels with the "right"
>> aspect ratio?
>>
>>
>> Thanks,
>> Chris
>>
>>
>> --
>> ************************************
>> Chris Beaumont
>> Graduate Student
>> Institute for Astronomy
>> University of Hawaii at Manoa
>> 2680 Woodlawn Drive
>> Honolulu, HI 96822
>> www.ifa.hawaii.edu/~beaumont
>> ************************************
>>
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