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[jduriez <question180578@xxxxxxxxxxxxxxxxxxxxx>]

Question #180578 on Yade changed:
https://answers.launchpad.net/yade/+question/180578

jduriez proposed the following answer:
"dynamic" or "fixed" concern both the way changes in position of bodies
(i.e. velocities) are handled by YADE.

- either velocities of bodies are updated according to sum of forces and
newton's law : this concerns what was called previously "dynamic" bodies
(for which dynamic = true)

- or velocities of bodies are considered to be constant (equal to an
initial value set up by the user), whatever the sum of forces. Useful
for boundaries bodies for example. They were called "non-dynamic" bodies
=> dynamic = false

These dynamic or non-dynamic designations were at one time replaced by
the other terms of "fixed" (or not). So, there is no difference at all,
except that "dynamic" concerns Yade's past, and that (dynamic = true)
<=> (fixed = false). And the contrary.

So for your present Yade's use, listen to Anton's advice.

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