While we're at it, looking for clues in the .decls file, what do...
dSetInternalContactSurfaceMode(mode):"odeSetInternalContactSurfaceMode@4" and
dGetInternalContactSurfaceMode%():"odeGetInternalContactSurfaceMode@0"
Those are the functions you requested, their functionality is described up there ^^ (See the JV-ODE Version 1.05 Released post)
dSetInternalContactSurfaceMode(mode):"odeSetInternalContactSurfaceMode@4" and
dGetInternalContactSurfaceMode%():"odeGetInternalContactSurfaceMode@0"
Those are the functions you requested, their functionality is described up there ^^ (See the JV-ODE Version 1.05 Released post)
Ha ha! Yeah, I've used them already. For some reason I thought they were part of the Space controls, being 'Internal' in name.
Thanks for the clarification. I see the top level is for the bulk of objects, with sub-levels for collision optimizations, basically grouping non-colliding objects. Quite an important take-home point for keeping things as fast as possible.