[yt-users] Problem with volume rendering

Sam Skillman samskillman at gmail.com
Tue Feb 25 09:45:31 PST 2014


Hi Joshua,

The "Failed to split grids" are probably (maybe) okay. I haven't rendered
ramses data in quite a while, but I think the kd-tree is probably just
finding a corner case that I didn't have a better way to cover than just
move on.

The progress bar error is a bit stranger, though I've also recently had
issues with it in ipython that I don't understand. Could you paste the full
traceback using http://paste.yt-project.org/ ?  That will make it easier to
pick a spot to place a try-except for now.

Sam


On Mon, Feb 24, 2014 at 6:05 AM, Joshua G. Albert <albert at strw.leidenuniv.nl
> wrote:

> Hello,
>
> Attn: Sam Skillman (Matthew thinks you might know a solution)
>
> I'm attempting to follow the Simple Volume Rendering recipe given in the
> cookbook (http://yt-project.org/doc/cookbook/simple_plots.html#
> Simple_Volume_Rendering). I'm using Ramses simulation output and after
> consulting Matthew Turk it should be fine, using the bleeding edge version,
> which I am. My code that fails is:
>
> pf = load(header)
> dd = pf.h.all_data()
> mi,ma = dd.quantities['Extrema']('Density')[0]
> tf = ColorTransferFunction((np.log10(mi)+1,np.log10(ma)))
> tf.add_layers(5,w=0.02)
> center=pf.domain_center
> look = [0.0,0.0,-1.0]
> width = 1.0
> res = 512
> cam = pf.h.camera(center,look,width,res,tf)
> cam.snapshot("%s_test_snap.png" % pf, clip_ratio=8.0)
> #Something fails in the progressbar of all places!
>
> I get a series of "Failed to split grids."
>
> It fails at snapshot, and at the end of the traceback I find:
>
> /data2/albert/ramses/yt-x86_64/src/yt-hg/yt/extern/progressbar/widgets.pyc
> in update_js(self, pbar)
>     344             $myPB.progressbar({{value: 0, max: {pbar.maxval:d}}});
>     345         }}
> --> 346         """.format(divid=self.uuid, pbar=pbar)
>     347
>     348
>
> ValueError: Unknown format code 'd' for object of type 'float'
>
> Any idea how to solve this easily? Possibly a good idea to optionally
> remove the progressbar in the future?
>
> --
> Best Regards,
>
> Joshua G. Albert
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