[yt-users] Rendering non-cubical volumes

[Nathan Goldbaum]

Excellent, happy volume rendering!  I'd love to see the final product once
you've finished tweaking your volume rendering script :)


On Wed, Jun 5, 2013 at 11:53 AM, Chris Beaumont
<cbeaumont at cfa.harvard.edu>wrote:

> 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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>>>
>>
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