[ODE] problems with amotor

[Jon Watte]

> Specifically, the manual seems to suggest you have to calculate the axes
> angles yourself every time step.  Is that true?

Yes, that is true. It's not all that hard, really -- you can usually pull 
the axes out of the rotation matrix directly (for a single body) or by 
crossing two such axes; one from each body (for two bodies).

I've used Amotors in user mode to stabilize a hovercraft, and it worked 
OK. "OK" here means "according to documentation."

Cheers,

			/ h+