spnavcfg2 visualization preview

I'm writting a new version of the spacenav[1] GUI configuration utility, which will include a real-time visualization of the device input affected by whatever options the user is tweaking interactively. This shows only the visualization under development, I just thought it's cool to watch the real device and its 3D counterpart side by side.

[1] Spacenav is a free software user-space driver for 6dof input devices such as the space navigator pictured here. Project website: http://spacenav.sourceforge.net ... https://www.youtube.com/watch?v=fo1TLnfov6Y