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[Bug 398089] Re: Body::isDynamic semantics is not clearly defined

To: yade-dev@xxxxxxxxxxxxxxxxxxx
From: Chareyre <bruno.chareyre@xxxxxxxxxxxxxxx>
Date: Mon, 14 Jun 2010 08:34:23 -0000
Reply-to: Bug 398089 <398089@xxxxxxxxxxxxxxxxxx>
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A quick implementation of new isDynamic semantic here : https://lists.launchpad.net/yade-users/msg03220.html
The good point in this exemple is non-dynamic bodies need less operations than dynamic ones (it doesn't integrate acceleration, the opposite of blockedDOFs which change acceleration, then integrate it).

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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.