[ODE] always diabled body

[Martin C. Martin]

Erwin de Vries wrote:
> 
> No. But i dont see the point in creating a fixed body anyway. Just DONT use
> a body if you dont want dynamics.

What the poster is trying to do is to control a body by putting a joint on
it, and moving the location of the half of the joint that's not on the
body.  They're doing this by creating a second body, attaching the joint
to it, and moving it.

IIRC, the ODE API seems to treat joints as having a single location,
rather than two locations.  Of course, most joints try to keep those two
locations the same, but in practice they'll rarely have exactly the same
location.  Perhaps the API could be extended so you could set the location
of each half of a joint independently?  Or is there already a way to do
this that I've missed?

- Martin