[yt-users] a question on camera with volume rendering
Sam Skillman
samskillman at gmail.com
Mon Jan 14 07:17:53 PST 2013
Hi Renyue,
It depends a bit on how you are saving the image, unfortunately. If you
are using a recent changeset of yt (after 2.4 where the transpose causes
symmetric images on some compilers/machines), and you save with:
cam.snapshot('image1.png')
Then image1.png will have north pointing up.
If you did:
im = cam.snapshot()
write_bitmap(im, 'image2.png', tranpose=False)
Then image2.png will have north pointing right.
If you did
im = cam.snapshot()
write_bitmap(im, 'image3.png', transpose=True)
Then image3.png will have north pointing up.
I am working on ways to make sure that it always points up by using the new
ImageArray class, but have not come up with the full solution yet. I hope
that description helps.
Sam
On Sat, Jan 12, 2013 at 8:12 PM, Renyue Cen <cen at astro.princeton.edu> wrote:
> Hi,
>
> I think I am unclear about the orientation in pf.h.camera(c,W,L, ...,
> north=vec, ...).
> I got some nice looking pictures but don't know what north means in this
> case,
> because when I switch north=vec to north=reverse of vec, the image rotates
> along the vertical direction,
> so it seems like north is pointing to either left or right. It is very
> desirable for me to be able
> to make sure which direction vec points to (vec is the vec in north=vec)
> in the final rendered plot.
>
>
> Thanks in advance for help,
> Renyue
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