Hi Mike,
On Tue, Jan 22, 2013 at 4:25 PM, Michael Kuhlen
Hi all
I'm not having any success with off-axis projections using the pf.h.camera() with AMRKDTree and ProjectionTransferFunction(). cam.snapshot() returns an all-zeros array, even in situations where ColorTransferFunction() produces great images.
This script (based on the first part of amrkdtree_downsampling.py) demonstrates the problem: http://paste.yt-project.org/show/3072/
Any ideas what's going wrong? Maybe something to do with preventing the log'ing of the field, which I attempted to do with "pf.field_info['Density'].take_log=False"?
Last Summer, during the course of the threading of the volume renderer, the camera class was split up into a couple different things. You should be able to get exactly what you're looking for by using projection_camera instead of camera. The function off_axis_projection will also work for this purpose. Something I think could be improved is to make the off-axis projection functionality much more distinct from the volume rendering; this would allow, among other things, the ability to specify a data object rather than a kD-tree volume for the off axis projection. I think this would be a big improvement, since unlike the volume rendering, off-axis projections are unordered and can thus be trivially masked. Cameron is working on a YTEP to the effect of improving the volume rendering API, and this should probably be a part of that. -Matt
Thanks for you help!
Mike
-- ********************************************************************* * * * Dr. Michael Kuhlen Theoretical Astrophysics Center * * email: mqk@astro.berkeley.edu UC Berkeley * * cell phone: (831) 588-1468 B-116 Hearst Field Annex # 3411 * * skype username: mikekuhlen Berkeley, CA 94720 * * * *********************************************************************
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