[yt-users] Real-time histogram presentation based on interactive volume rendered camera properties

Tue Apr 18 13:46:29 PDT 2017

Hi Em,
I think I have something that can get you going.
If you could clone the following repository:

hg clone https://bitbucket.org/xarthisius/reason
cd reason
hg update -C MPL_IDV

and then run: python reason.py. It should create a simple Qt Widget with
two frames: matplotlib canvas on the left, and yt's IDV on the right.
Whenever you double click on the right panel it should update the left
one with a current position of the camera.

It should be possible to compute the angles you need from the camera's
position and focus. All that's left is adding your data.

This code, in addition to all dependencies of IDV, requires PyQt4 with
OpenGL support.

Let me know if there are any issues.
Cheers,
Kacper

On 04/18/2017 03:27 PM, E.M. Dragowsky wrote:
> Thanks, Nathan -- will review in the next couple of days.
> 
> On Tue, Apr 18, 2017 at 4:24 PM, Nathan Goldbaum <nathan12343 at gmail.com>
> wrote:
> 
>> If you'd be interested in experimenting with the OpenGL volume rendering,
>> take a look at these doc pages:
>>
>> http://yt-project.org/docs/dev/visualizing/interactive_
>> data_visualization.html
>> http://yt-project.org/docs/dev/cookbook/complex_plots.
>> html#cookbook-opengl-vr
>>
>> In addition, the place in the codebase to look to see how this is
>> implemented is e.g. here:
>>
>> https://bitbucket.org/yt_analysis/yt/src/416bc87fd064d8cd5d64a98922c00c
>> 1cc71a0f7d/yt/visualization/volume_rendering/interactive_vr.py
>>
>> It makes use of cyglfw, a cython wrapper for the GLFW OpenGL library. If
>> you're familiar with OpenGL that will help.
>>
>> -Nathan
>>
>> On Tue, Apr 18, 2017 at 3:20 PM, E.M. Dragowsky <dragowsky at case.edu>
>> wrote:
>>
>>> Hi, Matt -- Thanks for offering this assessment of the current state,
>>> including the notion that my interest aligns with future plans.
>>>
>>> To aid in my report back to my sponsors, perhaps I can extend this
>>> conversation to determine if there's anything I can contribute to this
>>> development effort? I've described myself as a "researcher who can code",
>>> definitely not to be confused with a practiced developer, and yet...these
>>> topics of volume rendering and coordinated views have become really
>>> interesting to me.
>>>
>>> Please let me know,
>>> ~ Em
>>>
>>>
>>> ---------- Forwarded message ----------
>>> From: Matthew Turk <matthewturk at gmail.com>
>>> Date: Tue, Apr 18, 2017 at 2:47 PM
>>> Subject: Re: [yt-users] Real-time histogram presentation based on
>>> interactive volume rendered camera properties
>>> To: Discussion of the yt analysis package <yt-users at lists.spacepope.org>
>>>
>>>
>>> Hi Em,
>>>
>>> Thanks for writing.  Right now, this isn't possible; I had delayed on
>>> writing back because I was experimenting with ways of augmenting the
>>> existing OpenGL VR to do this, but I ended up not coming up with anything
>>> in time.  I absolutely think this is where we would like to go with our
>>> interactive VR, but I don't have a timetable for it right now.
>>>
>>> -Matt
>>>
>>> On Tue, Apr 11, 2017 at 9:54 AM, E.M. Dragowsky <dragowsky at case.edu>
>>> wrote:
>>>
>>>> Greetings --
>>>>
>>>> Please forgive the subject line -- it makes sense to me; hopefully after
>>>> reading the note it will make sense to me+1 or more....
>>>>
>>>> Just last week I became aware of yt, and so this is a question about
>>>> capabilities:
>>>>
>>>> I'm working on a project to aid a researcher with visualizing derived
>>>> data products (a set of ~5000 histograms) along with volume rendering of
>>>> simulations performed with Flash (flash.uchicago.edu). This would
>>>> involve manipulation of the rendered volume data (e.g. temp, density data
>>>> fields) and coordinated presentation in an inset or separate window from
>>>> the set of histograms. The active camera view angles from the rendered
>>>> volume display would be used to select from the histogram set (in this case
>>>> indexed by 51 polar angle bins and 101 azimuthal angle bins). The key
>>>> is for the histogram selection to take place as the rendered display is
>>>> being updated through user interaction -- so as the view is rotated, the
>>>> histogram updates without having to stop the user actions.
>>>>
>>>> Right now, these histograms are created at the end of the simulation.
>>>> One could imagine a more general case in which the histogram were derived
>>>> from the volumetric data in real time.
>>>>
>>>> Is this a task suited to the current state of yt development?
>>>>
>>>> Best regards,
>>>> ~ Em
>>>>
>>>> --
>>>> ----------------------------------
>>>> E.M. Dragowsky, Ph.D.
>>>> Research Computing -- UTech
>>>> Case Western Reserve University
>>>> (216) 368-0082
>>>>
>>>> _______________________________________________
>>>> yt-users mailing list
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>>>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>>>
>>>>
>>>
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>>>
>>>
>>> --
>>> ----------------------------------
>>> E.M. Dragowsky, Ph.D.
>>> Research Computing -- UTech
>>> Case Western Reserve University
>>> (216) 368-0082
>>>
>>> _______________________________________________
>>> yt-users mailing list
>>> yt-users at lists.spacepope.org
>>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>>
>>>
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