[PlayerStage-Gazebo] Position interface not working

[<si...@ro...>]

Dear Luis,
 I had similar problems. I indeed also had to disable the
dWorldSetAutoDisableFlag.
 However I also believe that in ODEHingeJoint::SetVelocity the method
SetParam is invoked with the parameters in the wrong order. See bug
report 2933700 in the tracker. Changing the order of the parameters
(see patch attached to bug report 2933700) fixed it for me.
 Hope this helps,
 Barry
 >I supposed it was something like that, but since I don't have a
clue about
  >physics simulation I didn't know were to look. Your proposal seems
more than
  >reasonable, but surprisingly it didn't fix the problem for me. It
doesn't
  >matter the speed I command to the robot, its bounding box keeps
still.
  >Thank you very much for your answer.
  >Dear Luis,
  >
  > I had the same problem last week and I discovered that the
automatic
  > disabling of objects in ODE (to save computation time) was the
reason, why I
  > couldn't move the robot.
  > A quick hack is to switch of the dWorldSetAutoDisableFlag in
ODEPhysics.cc.
  > The disabling makes sense in principle, but it is not
"re-enabled" (as far
  > as I can see) as soon as the controller sends new commands.
  >
  > Regards,
  >
  >   Stefan
  >
  >
  > ----- Original Nachricht ----
  > Von:     Luis Manso 
  > An:      playerstage-gazebo@li...
  > Datum:   25.01.2010 17:01
  > Betreff: [PlayerStage-Gazebo] Position interface not working
  >
  > > Hello,
  > >
  > > I have been successfully using Gazebo rev-8335 for some time.
Recently I
  > > updated to version 0.10 and the position interface doesn't move
the robot
  > > anymore. I also have the same problem with the current svn
version. If I
  > go
  > > back and install rev-8335 everything goes back to normal.
  > >
  > > I tried to move the robot using libgazebo both with the
software I've
  > been
  > > using for months and with the example in examples/libgazebo. In
order to
  > > try
  > > to find the problem I included some printf's
  > > in Differential_Position2d::UpdateChild()
  > > and Differential_Position2d::GetPositionCmd(), so I can see how
the
  > example
  > > program is updating the position command. Thus, I think it is
highly
  > > improbable that is a example program related problem.
  > >
  > > Does anyone know what is happening or what to do to find the
bug?
  > >
  > > I've tried lots of word files with different robots.
  > >
  > > Thanks in advance
  > >
  >
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