[SDL] Force feedback SDL lib

[Ryan C. Gordon]

> Of course I think the best way to achieve this would be to integrate 
> force feedback support into SDL somehow. It could become part of the 
> core of SDL, or a separate, SDL-compatible library. I think the latter 
> idea is probably better. However before I start any of this I wanted to 
> hear what all of you have to say about it.

A formal force-feedback API is something I would personally like in SDL 
1.3 ... this has come up a lot before, but the things that seem to stall 
it out are:

1) Usually no one has any idea how to make it work on Linux (but that 
has probably improved since then).
2) No one involved in SDL development has had a firm grasp of what a 
good, cross-platform force feedback API should look like (myself included).

It would probably eventually have to go into SDL itself, since otherwise 
it would conflict with SDL's other joystick functions which would be 
competing for control of the devices.

It's definitely worth exploring further.

--ryan.