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[jduriez <jerome.duriez@xxxxxxxxxxxxxxx>]

I only (re?)discover this. (summer holliday threads are difficult for me
to follow...)

So my point of view is that I would be glad that NewtonsIntegrator takes
also care of non dynamic bodies by displacing them according to a
velocity coming from somewhere else than forces.

In my present case it would allow me to control easily the movements of
non-dynamic bodies in python scripts (for test of constitutive laws for
example)

-- 
Body::isDynamic semantics is not clearly defined
https://bugs.launchpad.net/bugs/398089
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Status in Yet Another Dynamic Engine: Confirmed

Bug description:
Does isDynamic means that Newton's laws skip the body? Or that forces don't contribute to its velocity? Various Translation/RotationEngines rely by convention on that Newton's laws skip the body completely.

There was a discussion on that topic http://thread.gmane.org/gmane.science.physics.yade.devel/1059 and we should draw conclusions now.