[yt-users] question about transfer function colorbar

Michael Zingale michael.zingale at stonybrook.edu
Sun May 11 15:03:34 PDT 2014


I poked around that code earlier but didn't see anything odd.  I'll look
some more at it tomorrow.


On Sat, May 10, 2014 at 11:31 AM, Chris Malone <chris.m.malone at gmail.com>wrote:

> Hi Mike,
>
> The number that is getting set (~9.92e6) is just one bin off from the
> maximum value (you have a range of 2e7 and the default is 256 bins).  The
> code that displays the colorbar, as best I can tell, occurs when you call
> save_annotated.  This method eventually calls
> ColorTransferFunction.vert_cbar where the ticks and limits are applied to
> the colorbar axes object.
>
> Looking over the logic in that code, it is not immediately obvious to me
> why the index is off.  I suspect is has something to do with how the
> `visible` variable is defined, but I'd need to play with a dataset and some
> print statements...
>
> Chris
>
>
> On Wed, May 7, 2014 at 8:17 PM, Michael Zingale <
> michael.zingale at stonybrook.edu> wrote:
>
>> I'm trying to show the transfer function on a volume render.  Plotting a
>> velocity component, I set the transfer function with 4 Gaussians all with
>> the same width.  The range of the transfer function is -1.e7 to 1.e7, but
>> for some reason, when output, the upper label in the colorbar is not 1.e7
>> but a bit lower (9.92e6).  I am not sure where the code is that draws this,
>> and I am confused why it is not setting the tick at 1.e7. It gets the
>> bottom tick right.
>> Here's an image:
>>
>> http://bender.astro.sunysb.edu/random/test_0000.png
>>
>> and the script:
>>
>> http://bender.astro.sunysb.edu/random/vol_rotate.py
>>
>> any pointers are appreciated.
>>
>> Mike
>> --
>> Michael Zingale
>> Associate Professor
>>
>> Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY
>> 11794-3800
>> *phone*:  631-632-8225
>> *e-mail*: Michael.Zingale at stonybrook.edu
>> *web*: http://www.astro.sunysb.edu/mzingale
>>
>> _______________________________________________
>> yt-users mailing list
>> yt-users at lists.spacepope.org
>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>
>>
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
>


-- 
Michael Zingale
Associate Professor

Dept. of Physics & Astronomy • Stony Brook University • Stony Brook, NY
11794-3800
*phone*:  631-632-8225
*e-mail*: Michael.Zingale at stonybrook.edu
*web*: http://www.astro.sunysb.edu/mzingale
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.spacepope.org/pipermail/yt-users-spacepope.org/attachments/20140511/36d0c87b/attachment.htm>


More information about the yt-users mailing list