Use it to change the pencil's width.

in the json config file.

Send line drawing.

python script).

Record start/end of draw.

(lights have to be 'headLight')

Change flatLine geometry shader, to have a 'ruban' following the
'pencil' (see the comment in the shader's file).

Note: that's to be reworked, there should not be so much logic
in OpenVRSet/updateInteraction(). See TODO

set by the HardwareSet.
OpenVRSet: Implement a choice of the primaryHand by clicking on the ApplicationMenu button
of one controller.
OpenVRSet: 'space' key suspend/resume composition (when suspended, the Compositior renders
the 'entry' room)

Move SceneGraph/Scene into Apps