[ODE] Approximate Hydrodynamic Forces

[Mattias Fagerlund]

> > I want to be able to get the speed that each face of a cube, say, is
> > moving  along its own normal.  So I can apply an opposing force to
> each
> > face  dependent on its area.  Is there an easy way to get this info?
> >
> > I am hoping to approximate hydrodynamic forces, so I can evolve a
> > swimming  animat.

If your creatures will be appearing in near-surface conditions I suggest 
you give my page on buoyancy a read; 
http://www.cambrianlabs.com/mattias/DelphiODE/BuoyancyParticles.htm. If 
they're fully submerged, it's all drag...

cheers,
m