These are attempts to find a substitute for the expensive, non-intuitive dials boxes that we use to drive molecular-graphics programs, primarily on DEC Alpha and Silicon Graphics workstations.
The main program of interest is O, which is driven by X, and so all the drivers for these joysticks deliver "ClientMessage" events that can be picked up by an X program. See the individual descriptions for details.
10-Apr-2000
That bit about X is not true anymore. The NT version of O uses GLut,
so a new approach has been taken. You can read about progress on that front under
liborb, but it's probably only of interest to developers.