[yt-dev] light cone problems

[Britton Smith]

Hi Stephen,

Thanks for catching all this.  Your changes all look good to me, with one
suggestion.

I recommend replacing set_parameters=None and then adding a line:
if set_parameters is None: set_parameters={}
When setting the empty dist in the kwarg, you can run into situations where
things can get stuck in that dict from previous calls to that function,
since it's a pointer.
Other than that, it looks great.  I'll accept the PR when you submit one.
The add_redshift_label kwarg was removed when use of the PlotCollection to
generate the projections was dropped.  Thanks for catching that, too.

Britton

On Fri, Jun 15, 2012 at 12:00 PM, Stephen Skory <s at skory.us> wrote:

> Hi,
>
> I have been messing around with the example light cone generator
> example for halos:
>
> http://yt-project.org/doc/cookbook/index.html#cookbook-light-cone-halo-mask
>
> and I have come across a few issues. My guess is that the various
> things the light cone uses (the halo profiler, FRB) have changed
> underneath the light cone. I think I've got it working with some
> changes, but at least one is not a good permanent solution, and I'd
> like Britton eyes on this since I don't really understand all the
> details of the LC and I'm not sure that these changes are good.
>
> 1. In the example above, the "add_redshift_label" keyword to
> "project_light_cone()" doesn't appear to exist any more.
>
> 2. I've made these changes to the yt source to get things to work:
>
> http://paste.yt-project.org/show/2466/
>
> a. The changes to halo_mask.py are hacks. It appears that the halo
> profiler now adds the overdensity factor to "RadiusMpc" and
> "TotalMassMsun" (e.g. "RadiusMpc_200"). It seems to me that the
> correct way to fix this is to pass the halo profiler kwargs down to
> the _make_slice_halo_list() function where these lines appear so the
> overdensity factor can be included in these strings. What do you
> think?
>
> b. In light_cone.py I've changed the default of set_parameters to an
> empty dict, which dict.update() accepts to perform no action, when
> None makes it croak.
>
> c. frb.field_data[] doesn't appear to work.
>
> Thanks!
>
> --
> Stephen Skory
> s at skory.us
> http://stephenskory.com/
> 510.621.3687 (google voice)
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>
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