def off_screen_viewer():
"""A factory that creates an offscreen viewer."""
win = TVTKWindow(off_screen_rendering=True)
# Need to set some non-zero size for the off screen window. If
# not we get VTK errors on Linux.
win.scene.set_size((300, 300))
return win
def off_screen_viewer_factory(size=(400, 350)):
"""A factory that creates an offscreen viewer."""
win = TVTKWindow(off_screen_rendering=True)
# Set all preferences.
set_scene_preferences(win.scene)
# Set the size.
win.scene.set_size(size)
return win