[ODE] Distance between two objects

[Tatu Lahtela]

Is there a ready made function to calculate the (shortest) distance 
between two objects?
I trying to create force fields to the objects that are extremely distance 
dependent
(electrostatic and van Der Walls) so I need know the shortest distance 
between two objects
and use this information to calculate the force if the objects are closer 
than a given value.

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Tampere University of Technology / Automation and Control Institute
Tatu Lahtela <lahtela at cs.tut.fi>