Hey Geoffrey, Great suggestions -- thanks for chiming in! On Fri, Jun 8, 2012 at 4:09 PM, Geoffrey So <gsiisg@gmail.com> wrote:
I acutally spend some time trying to plot the transfer function then sticking it to the side of the image, but gave up after I couldn't easily customize aspects of it.
I'm sorry to hear that! Also, if you're particularly proud of a volume rendering, you should definitely spread it around along with a citation to the paper -- this goes for everybody else out there, too. I think we should continue to rotate the images in the little sliding thing on the website.
- What would be really cool is what you've done already, change the background color, probably something really easy but I didn't figure out how.
Ah, hmm, interesting idea. One problem with the idea of a background color is that we start with 0,0,0 for the rgb values, and we go from there. We might be able to get around this by defining some kind of intersection level, and alphas, but it's beyond what I'm capable of coming up with on a Friday afternoon. :)
- Another thing is to be able to use log scale on the Y axis, because with many added gaussian, you don't really see the ones on the small end.
Great point.
- Also if we can shrink the size then we can use it like a sort of colorbar (as Nathan pointed out) and glue it to the side or bottom of the volume rendering. - We can also annotate some of the volume rendering attributes on the side along with the transfer function/colorbar
I think this is a very valuable suggestion. In some talks I have given in the past I have used volume rendering to highlight densities of interest, and then put them alongside highlighted regions in a phase plot, to emphasize the correlation between the morphology evident in the VR with chemical changes. (I'm thinking the attached image, which comes from between slides 17-21 of this talk: http://www.as.utexas.edu/~fsgcon/abstracts_and_talks/m_turk_talk.html ) and I would love to be able to do similar things in a plot in a paper or an image on the web. Adding annotations to the colorbar would be great for that. Having the ability to not just control the VR explicitly, but also to add on colorbars, would help turn what is now primarily a visualization tool (although Cameron has some opinions on that) into something much more communicative. I'm glad this conversation got going! -Matt
From G.S. On Fri, Jun 8, 2012 at 12:40 PM, Nathan Goldbaum <goldbaum@ucolick.org> 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]).
Nathan Goldbaum Graduate Student Astronomy & Astrophysics, UCSC goldbaum@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
!DSPAM:10175,4fd253db101042955315835! _______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org
!DSPAM:10175,4fd253db101042955315835!
_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org
_______________________________________________ yt-dev mailing list yt-dev@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-dev-spacepope.org
