[yt-dev] OpenGL VR

[Cameron Hummels]

Does this have a similar API / interface to the standard VR?

On Thu, Feb 25, 2016 at 9:45 AM, Nathan Goldbaum <nathan12343 at gmail.com>
wrote:

>
>
> On Thu, Feb 25, 2016 at 11:40 AM, Matthew Turk <matthewturk at gmail.com>
> wrote:
>
>> Hi folks,
>>
>> Over the last little while, Kacper, Andrew and I have been picking up
>> on some work started by Chuck Rozhon to implement OpenGL-based volume
>> rendering of AMR data.  Kacper recorded a demo about a week ago,
>> although it has improved considerably even since then:
>>
>> https://www.youtube.com/watch?v=yiiBDK1OJDo
>>
>> As of right now, it can do these things:
>>
>>  * Load up a "data source" (which can be all_data, but doesn't need to be)
>>  * Utilize orthographic and perspective cameras
>>  * Maximum intensity projection
>>  * Integrated projection
>>  * Apply colormaps to these two things, using two-pass rendering
>>  * Trackball camera with keyboard shortcuts for moving around the domain
>>  * Output camera information that is compatible with the software
>> renderer (i.e., it can be used to get a sequence of camera positions)
>>  * Save images out
>>  * Preliminary support for color transfer function-based VR.  At
>> present this only supports isosurfaces that are manually encoded.  It
>> will soon take 1D textures from the CTF object.
>>
>> The system has been designed to be very modular, with extensible
>> keyboard and mouse shortcuts.  Kacper has even been able to build a
>> very lightweight Qt-based GUI around it (on BB as xarthisius/reason )
>> without changing much/any of the internal-to-yt code.  Also, it works
>> reasonably well even on fairly old graphics cards for reasonably sized
>> data.  (And since it'll accept data objects that are cutouts, this
>> means you could pull a sphere or block out of a gigantic dataset and
>> use that.)
>>
>> Anyway, the reason I'm writing is that I'd like to bring it to
>> people's attention sooner rather than later.  It'll need some testing,
>> and we're also working to make it in a readily usable state as well.
>> As of right now, before WIP gets removed from the pull request, we're
>> going to add documentation (with notes that it is likely an unstable
>> API) and hopefully a short screencast.  But before then, I would like
>> to invite folks to either review the PR or to test it out.
>>
>> https://bitbucket.org/yt_analysis/yt/pull-requests/1598
>>
>> Note that this requires cyglfw3, which is accessible via pip.
>>
>
> Also needs glfw3, which I installed via homebrew.
>
>
>>
>> I'm pretty excited about this, and the design we have been aiming for
>> with the way it accepts objects and shaders should enable a lot of
>> cool things to be done -- especially with respect to selecting data,
>> presenting it, etc etc.
>>
>> I'd really like to see this be a part of 3.3.
>>
>> -Matt
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>>
>
>
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-- 
Cameron Hummels
NSF Postdoctoral Fellow
Department of Astronomy
California Institute of Technology
http://chummels.org
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