yade-dev team mailing list archive

[Jan Stránský <honzik.stransky@xxxxxxxxx>]

Hi Vaclav, yes, NewtonIntegrator is in O.engines by default if you do not
change it..
Jan


2014-12-19 16:57 GMT+01:00 Václav Šmilauer <eu@xxxxxxxx>:

> Hi, the code was always working, and still should be, in
> NewtonIntegrator.pp:208 (and 2 other lines for rotations) I read
>
>    if (scene->forces.getMoveRotUsed())
> state->pos+=scene->forces.getMove(id);
>
> It was supposed to impose displacement or rotation change directly, and
> to do it in a way which is thread-safe; changing b.vel may affect other
> computations going on in that timestep, plus it usually supposes that dt
> does not change between steps (not always the case). But I see there is
> only little use for it, and I would have to remember hard what was the
> reason to introduce it back then. There must have been one :)
>
> @Jan, do you have NewtonIntegrator in engines?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1400075
>
> Title:
>   O.forces.addMove does not work
>
> Status in Yet Another Dynamic Engine:
>   New
>
> Bug description:
>   Hi,
>
>   I tried O.forces.addMove to apply displacement to a particle, but the
>   method seems not to work..
>
>   b = sphere((0,0,0),1)
>   O.bodies.append(b)
>   O.forces.addMove(0,(1,0,0))
>   print b.state.pos # (0,0,0)
>   O.step()
>   print b.state.pos # is (0,0,0) again...
>
>   Is this behavior ok, do I do something wrong or is it a bug?
>
>   I use Ubuntu 14.04 and yade  2014-11-08.git-d693417
>
>   Thanks
>   Jan
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/yade/+bug/1400075/+subscriptions
>

-- 
You received this bug notification because you are a member of Yade
developers, which is subscribed to Yade.
https://bugs.launchpad.net/bugs/1400075

Title:
  O.forces.addMove does not work

Status in Yet Another Dynamic Engine:
  New

Bug description:
  Hi,

  I tried O.forces.addMove to apply displacement to a particle, but the
  method seems not to work..

  b = sphere((0,0,0),1)
  O.bodies.append(b)
  O.forces.addMove(0,(1,0,0))
  print b.state.pos # (0,0,0)
  O.step()
  print b.state.pos # is (0,0,0) again...

  Is this behavior ok, do I do something wrong or is it a bug?

  I use Ubuntu 14.04 and yade  2014-11-08.git-d693417

  Thanks
  Jan

To manage notifications about this bug go to:
https://bugs.launchpad.net/yade/+bug/1400075/+subscriptions