[ODE] Moving ray geometry

[Matt Green]

I'm trying to make a ray part of a composite object in order to check
the distance of something in a specific direction from a local frame
of reference in a body with total freedom of rotation (six degrees of
freedom I think it's called). Anyway, when I add any other object to
this composite it moves with the body, but a ray does not, it stays
motionless even when the rest of the geoms in the body move. Can
anybody please inform me whether it is possible to make a ray geom
move, or will I have to attempt to muddle through using a cylinder or
somesuch as a substitute(really don't want to do that. rays provide no
nonsense penetration depth reporting)?