[yt-users] yt volume render/AMRKDtree help

John Wise jwise at physics.gatech.edu
Tue Jan 8 08:56:15 PST 2013


Hi Renyue,

Yes, I reverted it back to v2.4 a few weeks ago.  I can update yt to the 
latest version to see if it helps with these problems.

John

On 01/08/2013 11:38 AM, Renyue Cen wrote:
> Hi Sam,
>
> I am using the version that John installed on Pleiades.
> I got some other unrelated problems with profiling before and John was
> kind enough to
> revert back to an older version (I think). Anyway, this is what I got:
>
> /u/jhwise/local/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg
>
> Separately, I will try your transpose fix and will let you know.
>
> But the KDTree was really smoking fast (50-100 times compared to
> without) that
> makes things very efficient. I would like to thank you for that.
>
> Thanks very much,
> Renyue
>
>
> On Jan 8, 2013, at 11:25 AM, Sam Skillman wrote:
>
>> Hi Renyue,
>>
>> I have actually seen this on one other system but I could never
>> reproduce it. Could you tell me the version of yt you are using? If
>> you run "yt instinfo" it should tell you. I haven't seen this bug for
>> the last few months so I thought it was gone.
>>
>> Additionally, can you try the following at the end of your script:
>>
>> im=cam.snapshot('test1.png')
>>
>> write_bitmap(im, 'test2.png', transpose=False)
>>
>> I think there may have been something wrong with the transposing of
>> the image for a short time period a few months ago.  I have very
>> sporadic and unreliable internet at AAS but I'll try to respond as
>> quickly as possible.
>>
>> Sorry for the trouble,
>>
>> Sam
>>
>>
>> On Jan 7, 2013 10:11 AM, "Renyue Cen" <cen at astro.princeton.edu
>> <mailto:cen at astro.princeton.edu>> wrote:
>>
>>     Hi,
>>
>>     I did some simple volume rendering with the following script:
>>
>>         volume2 = AMRKDTree(pf, fields=["Dark_Matter_Density"],
>>                     no_ghost=False, tree_type="domain",
>>                     le=c-0.5*WW, re=c+0.5*WW)
>>         cam = pf.h.camera(c, L, W, N, tf, volume=volume2, no_ghost=False,
>>                     north_vector=L, steady_north=True)
>>         cam.snapshot(fn="%s_iso-DMdensity-%3.3d.png" % (filenameTHIS, j))
>>
>>
>>     I got rather strange results in that the pictures look symmetric,
>>     which I am pretty
>>     sure can not be true.
>>     I attach the obtained plot.
>>     Note that I am using KD tree and using 32 cores.
>>
>>     Your help at your earliest convenience is appreciated.
>>     Best,
>>     Renyue
>>
>>
>>     <C15z1600.0043_iso-DMdensity-000.png>
>>
>

-- 
John Wise
Assistant Professor of Physics
Center for Relativistic Astrophysics, Georgia Tech



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