[yt-dev] Transfer Function Plots

[Matthew Turk]

I like this behavior.  It seems to me like this can/should also work with
the camera independently, rihgt?

Also, very nice job.  Are you using pylab, or do you think this could be
done with just our existing freetype-wrapping functionality?  I'd prefer
the latter ... :)

On Fri, Jun 8, 2012 at 5:06 PM, Sam Skillman <samskillman at gmail.com> wrote:

> Okay, I've prototyped something that works like this:
>
> interactive_camera.snapshot()
> ...pops up interactive matplotlib window...
> interactive_camera.save('test.png')
> ...grabs all needed information and makes this...
>
> [image: Inline image 1]
>
> +/- 1?  It just needs some cleanup, like reducing the extent of the
> colorbar so you don't get the black strip at the top and bottom of the
> image.
>
> Sam
>
> On Fri, Jun 8, 2012 at 2:12 PM, Richard P Wagner <rpwagner at sdsc.edu>wrote:
>
>>
>>  On Jun 8, 2012, at 12:40 PM, Nathan Goldbaum wrote:
>>
>>  I'd prefer it if the transfer function plot were split into two
>> separate frames.  Right now, it's easy to think that the black background
>> color image contains opacity information since the frame is plotted with a
>> y axis.  I'd prefer it if only the white line was plotted with a y axis and
>> the black background image was plotted in a separate frame like a color
>> bar with no y axis.  This would also let the user see the tick marks for
>> the opacity plot much more easily.
>>
>>  In general, I like plotting the transfer function like a color bar
>> (sort of like Stella Offner's image on the yt homepage [
>> http://yt-project.org/img/offner_etal.png]).
>>
>>
>>  That's what came to mind when I was reading this. For a while, we've
>> been putting a combination color bar-transfer function graphic in our
>> renderings with ANL (skip about 30 seconds into
>> http://www.youtube.com/watch?v=5dOt0IaRY4U). I think it's very natural
>> to overlay a transfer function plot onto a color bar, and it provides a lot
>> of information in a simple fashion.
>>
>>  --Rick
>>
>>
>>    Nathan Goldbaum
>> Graduate Student
>> Astronomy & Astrophysics, UCSC
>> goldbaum at ucolick.org
>> http://www.ucolick.org/~goldbaum
>>
>>  On Jun 8, 2012, at 12:34 PM, Sam Skillman wrote:
>>
>>  Hi all,
>>
>>  I've been experimenting with different ways to plot the transfer
>> functions, and in particular in the context of the InteractiveCamera.
>>
>>  What are people's thoughts about this behavior:
>>
>>  http://i.imgur.com/CGZ7Z.png
>> http://i.imgur.com/OCsVt.jpg
>> http://i.imgur.com/VNEse.png
>>
>>  btw, you can get this behavior by changing your script to call
>> pf.h.interactive_camera, and then running in ipython with a working
>> matplotlib backend.
>>
>>  I'll let Nathan bring up his concerns rather than me try to convey them.
>>
>>  Sam
>>
>>
>>
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