On Thu, May 28, 2015 at 12:54 PM, Dave Semeraro <semeraro@tacc.utexas.edu> wrote:

Helly yt-crowd.

I am doing some volume rendering in yt and getting some errors when I try to grow the image size. I am trying to write a png image that is 1024 x 1024. I get the following errors:

image_array.py:229: RuntimeWarning: invalid value encountered in multiply

np.multiply(self[:, :, :3], 1.0/cmax, out[:, :, :3])

The warning is being triggered here:

https://bitbucket.org/yt_analysis/yt/src/8ad62b62439013a33e3a2b568a5a26b567e93f54/yt/data_objects/image_array.py?at=yt#cl-229

which I think means cmax is 0. I'd need to see the full traceback or step through execution in a debugger to figure out why.

yt_array.py:764: RuntimeWarning: divide by zero encountered in divide

return YTArray(super(YTArray, self).__rdiv__(lo))

The largest image I can generate is about 800x 800. It is a nice image too I tell ya. Just wish I could do a bigger one to submit for publication.

There's no limit on the image size for a volume rendering.

Attached is the script I am using. Any help would be great.

Thanks,

Dave Semeraro

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