updating camera position in osmesa?

[chrishavlin]

Not sure if this a bug or user error but trying to set the rc.scene.camera.position with an osmesa rendering context does not work:

import yt
import yt_idv

ds = yt.load_sample("IsolatedGalaxy")
dd = ds.all_data()

rc = yt_idv.render_context("osmesa", width=1024, height=1024)
rc.add_scene(dd, "density", no_ghost=True)
rc.scene.camera.position =  [0.5, 0.5, 2]

image = rc.run()
yt.write_bitmap(image, "niiiiiice.png")

This works as expected with the pyglet gui

[chrishavlin]

also, just for fun, this is what i was seeing with a spherical dataset

[chrishavlin]

looking at the trackball camera, I think I just need to add a traitlets.observe for the position attribute and update the related view matrix. I guess the gui probably updates the view on changes to those gui attributes? anyway, might have a fix shortly...