Re: [Java-player-users] Gazebo is running strange

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I'll try to make a movie with a digital camera, so the act of filming
doesn't interfere  the simulation.

On older tests  running only Gazebo works fine...

Again, thank you so much!!!

:-)

2007/1/30, John Oliver <joh...@gm...>:
>
>
> **In response to private message**
>
> I think there are a number of things going on here.
>
> First was it me but you were getting the same issues when you were not
> using
> java at all.  At one point in the gazeboOnly video the clock stops at 59.=
2
> for about 3 seconds for no apparent reason.  To me this seems to point to
> some issue with gazebo/stage and not java.
>
> Secondly I presume the stage video was running a simple algorithm but jav=
a
> was consuming all the spare cpu time it could by the look of it.  Your
> recorder program was taking 20%ish but if that was not there I think java
> would have taken it anyway.  Having run it on my system with
> runThread(-1,-1) it took 99.9% cpu usage, although it didn't seem to slow
> the system down at all, java must do something a bit weird with its
> yielding, to take 99.9% cpu time but not slow things down.  However
> running
> with (1,-1) reduced cpu usage to 18%.  So I would probably recommend
> calling
> runTreaded with some reasonable values so that java does not do its cpu
> eating thing.
>
> However again I do not think that Java is the issue since the problem
> appeared to exist in the gazeboOnly video too, its just more noticeable
> when
> java is running, probably since java is taking more processing power.
>
> John
>
>
>
> Alexandre Henrique Vieira Soares wrote:
> >
> > Hi, I'm trying do run a Java application with Gazebo and I noticed that
> > the
> > execution of the application is making Gazebo be slow.
> >
> > The robot is not showing a continuous movement, it is "jumping" along
> the
> > time. I have already noticed that the Gazebo timer (the time that is
> shown
> > on the interface) is stopping, the same as the robot.
> >
> > Running " glxinfo | grep rendering " command I got " direct rendering:
> Yes
> > "
> > .
> >
> > I run the CircleWalk example (
> > http://java-player.sourceforge.net/docs/howto.pdf ) on Gazebo using
> > Javaclient and everything was right.
> >
> > Looking the Wall Follower example (
> > http://java-player.sourceforge.net/examples/2.x/SpaceWandererExample.tg=
z,
> > which were strange, with the robot 'jumping'), I saw a '
> > robot.runThreaded(-1, -1);' command.
> >
> > When I put this command on CircleWalk example the same as Wall Follower
> > example occured... the robot started jumping...
> >
> > So, I tried to remove the 'robot.runThreaded (-1, -1);' from Wall
> Follower
> > example and the robot stopped moving... the application only works with
> > that
> > command.
> >
> > I run the same application on Stage and all works fine.
> >
> > Is there something I can do to make the robot movement continuous on
> > Gazebo?
> >
> > My computer is an Athlon XP 2400+, 512MB RAM, my video card is a
> GeForce4
> > MX
> > 4000 AGP 8x with 128MB of memory.
> >
> > Thanks.
> >
> > PS.: The Gazebo application can be found in
> >
> http://www.lsi.cefetmg.br/~ahvsoares/robotica/exemplos/WallFollowerExampl=
eGazebo.zipand
> > the Stage application can be found in
> >
> http://www.lsi.cefetmg.br/~ahvsoares/robotica/exemplos/WallFollowerExampl=
eStage.zip
> .
> > Both
> > n<
> http://www.lsi.cefetmg.br/%7Eahvsoares/robotica/exemplos/WallFollowerExam=
ple-Gazebo.tgz
> >eeds
> > Javaclient API. The videos running Gazebo application can be found in
> > http://www.lsi.cefetmg.br/~ahvsoares/robotica/exemplos/Gazebo.ogg and
> the
> > Stage video in
> > http://www.lsi.cefetmg.br/~ahvsoares/robotica/exemplos/Stage.ogg .
> >
> > --
> > Alexandre Henrique Vieira Soares
> > ____________________________________________________
> > Mestrando em Modelagem Matem=E1tica e Computacional
> > Linha de Pesquisa: Sistemas Inteligentes
> > Cefet-MG
> > Belo Horizonte, Brasil
> >
> >
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--=20

Alexandre Henrique Vieira Soares
____________________________________________________
Mestrando em Modelagem Matem=E1tica e Computacional
Linha de Pesquisa: Sistemas Inteligentes
Cefet-MG
Belo Horizonte, Brasil