[ODE] GIMPACT with doubles

[Pierre Terdiman]

> I've wondered about this myself - why does /everything/ have to be in
> double precision?

It doesn't have to.

> Do I really need that extra precision in the lengths
> of my box sides?

No.

> Does it really help in the quaternions?

No.

> It seems like
> we could save a lot of memory by only using doubles where they
> actually bought us something.

Exactly.

> It would be a straightforward -- if
> labor intensive -- modification.

Yes and yes. Been there, done that :)

- Pierre