[yt-users] export_obj function for Blender3D

[Nathan Goldbaum]

On Wed Dec 17 2014 at 3:04:25 PM Dionysopoulou K. <
K.Dionysopoulou at soton.ac.uk> wrote:

> Dear all,
>
> I am trying to use the yt export_obj function in order to be able to use
> yt in conjunction with Blender3D. I am very new to yt, so I tried the
> simple example you have here:
>
> http://yt-project.org/doc/visualizing/sketchfab.html
>
> and here
>
> http://blog.yt-project.org
>
> My problem is that even when using the data suggested in the webpage the
> code snippet provided fails to produce the mtl and obj files. After taking
> a quick look at the code I noticed the initial problem was caused by
> inconsistent units for the emissivity (maybe a typo in the docs?). I also
> changed ‘mpc’ to ‘Mpc’ as yt was complaining that the domain was too small.


I can't speak to other issues you're having, but this was something we
changed going from version 2 to version 3 of yt.  In the old version, "mpc"
meant Megaparsec.  In the new version, where we've added a formal unit
system, "mpc" is interpreted as milliparsec.  We decided not to force mpc
to mean Megaparsec to maintain backward compatibility in order to be
consistent with other SI-prefixable units like meter.

See this e-mail thread:

http://lists.spacepope.org/pipermail/yt-dev-spacepope.org/2013-December/012520.html


> Even after these minor changes the export_obj function does not seem to
> work for me. The error messages are attached in the python notebook below
> (the notebook is basically just a copy and paste from the provided ones in
> the websites above).
>
> The similar (but different) export_sketchfab function seems to work fine
> for the same data. I cannot really figure out what goes wrong with the
> export_obj function and any help would be very much appreciated.
>
>
>
> Thanks in advance,
>
>
> Kyriaki Dionysopoulou
> =======================================================
> Mathematical Sciences
> University of Southampton
> Southampton, SO17 1BJ, UK
> K.Dionysopoulou at soton.ac.uk<mailto:K.Dionysopoulou at soton.ac.uk>
>
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