[yt-users] Projection Question

[david collins]

Hi, all--

I have a dumb projection question.

Why is it that when I do a projection, the minimum pdx is smaller than the
minimum cell width in my simulation?

>>> pf.h.get_smallest_dx()
0.0001220703125
>>> 1./pf.h.get_smallest_dx()
8192.0

Additionally, the sum of the areas is not what I expect.  I expect

>>> proj=pf.h.proj(0,'Density')
>>> (proj['pdx']*proj['pdy']).sum()
0.25


I get 0.25, instead of 1 (consistent with the above, if all the widths are
down by a factor of 2.)

I assumed that proj['pdx'] is the width of the zone of the projection,
which I naievely expect to be the smallest cell width along any line of
sight.

Could one of you good people fill in what I'm misunderstanding?

Thanks a ton!
d.
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