Hi Matt, Cheers for the info, I’ll take a look at your Unity code, I’m betting it’ll be better than my stab at it a few months back, I used someone else’s ray-marching code: https://github.com/brianasu/unity-ray-marching/tree/volumetric-textures Is it a mercurial repository? (I’ve just never used that before)

Hi Nathan, My skillset doesn’t cover Open GL or general graphics either (yet, maybe in time), but I’m more than happy to help where I can and I have enough people here interested to get their data in VR that there’s a good amount of support. :) I assume yt’s OpenGL volume rendering uses ray-marching?

Hi Suoqing, Cheers, that’s cool, I’ll have to give that a try too, I’ll have to see if the data will look good on that.

Hi Jill, That’s a good idea, I’d never heard of sketchfab, most of our datasets are more volume then surface, but it’s worth a try for some of my solar stuff.

Thanks guys, I’m getting loads of cool ideas from here.

Regards Alex

From: yt-users-request@lists.spacepope.org [yt-users-request@lists.spacepope.org] Sent: 23 May 2017 19:01 To: yt-users@lists.spacepope.org Subject: yt-users Digest, Vol 111, Issue 44

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Today's Topics:

1. Re: YT VR Visualisation (Naiman, Jill)
2. Re: YT VR Visualisation (Suoqing Ji)
3. Ramses MHD visualization (Daniel William Murray)

Message: 1 Date: Tue, 23 May 2017 10:00:31 +1000 From: "Naiman, Jill" jill.naiman@cfa.harvard.edu To: Discussion of the yt analysis package yt-users@lists.spacepope.org Subject: Re: [yt-users] YT VR Visualisation Message-ID: CAFwWoV-K5rWnL_9LZVQ4ZVhvaH8znbMo0Vi1yrg0MeApeSxuXw@mail.gmail.com Content-Type: text/plain; charset="utf-8"

Hi All,

Just FYI - one can also generate points/surfaces with yt and upload them somewhere like Sketchfab and use their VR mechanisms.

Looking forward to what comes of it!

Cheers, -Jill

On Tue, May 23, 2017 at 2:14 AM, Nathan Goldbaum nathan12343@gmail.com wrote:

> >

Alex

Message: 2 Date: Mon, 22 May 2017 17:18:20 -0700 From: Suoqing Ji suoqing@physics.ucsb.edu To: Discussion of the yt analysis package yt-users@lists.spacepope.org Subject: Re: [yt-users] YT VR Visualisation Message-ID: ca3136c6-5fe9-4aac-92df-09d17d82bffc@Spark Content-Type: text/plain; charset="utf-8"

Hi Alex,

Just to add up one more point: yt is always able to generate pre-rendered virtual reality movies with stereo-spherical lens, which works perfectly with Google Cardboard.

To generate the movie, you could refer to this page: http://yt-project.org/docs/dev/visualizing/volume_rendering.html#spherical-a...

An example move is at:?https://www.youtube.com/watch?v=ZYWY53X7UQE . You could also put your smartphone into Google Cardboard to watch the video with Youtube App.

Best wishes, ? Suoqing Ji Ph.D Candidate Department of Physics University of California, Santa Barbara http://physics.ucsb.edu/~suoqing

On May 22, 2017, 5:00 PM -0700, Naiman, Jill jill.naiman@cfa.harvard.edu, wrote:

Message: 3 Date: Tue, 23 May 2017 17:59:15 +0000 From: Daniel William Murray dwmurray@uwm.edu To: "yt-users@lists.spacepope.org" yt-users@lists.spacepope.org Subject: [yt-users] Ramses MHD visualization Message-ID: MWHPR04MB1185DDA612C4C5D38349B6DDDCF90@MWHPR04MB1185.namprd04.prod.outlook.c...

Content-Type: text/plain; charset="iso-8859-1"

Dear yt folks,

I am trying to visualize some RAMSES MHD simulation data. The simulation is for gravitationally collapsing gas looking at star formation. I'm looking to obtain projection and slice plots and then annotate the magnetic fields onto the resulting image.

I'm on Mac OS X 10.9.5

I'm using conda 4.3.18

My version of yt is: 3.3.5-py27_0

and python 2.7.12

All of what I believe is the relevant code:

pf = yt.load('output_00284/info_00284.txt')

sp = pf.h.sphere(part_center, (zoom_width + 0.5, "pc"))

L = sp.quantities.angular_momentum_vector()

p = yt.OffAxisSlicePlot(pf, L, 'density', center=part_center, width =(zoom_width, "pc"))

p.annotate_magnetic_field()

p.save('test.png')

The error:

yt.utilities.exceptions.YTPlotCallbackError: annotate_magnetic_field callback failed with the following error: Could not find field '('all', 'magnetic_field_x')' in info_00284.

If I load the field list for the data set, I can see that the B field data is there, but under 'ramses', not 'all'

('ramses', 'x-Bfield-left'),

('ramses', 'x-Bfield-right'),

('ramses', 'x-velocity'),

('ramses', 'y-Bfield-left'),

('ramses', 'y-Bfield-right'),

('ramses', 'y-velocity'),

('ramses', 'z-Bfield-left'),

('ramses', 'z-Bfield-right'),

Is there a way to pass these fields to annotate_magnetic_field? Or a manner in which I can have this information load in the field ('all', 'magnetic_field_')

I should also note that I can create and save the plots with no issues, so long as I do not try to annotate the magnetic fields.

Cheers, Daniel Murray Graduate student at University of Wisconsin Milwaukee

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