[ros-users] erratic_player vs ua_erratic_player

Brian Gerkey gerkey at willowgarage.com
Sat May 1 00:15:49 UTC 2010

hi Pablo, Anton,

I wrote the erratic_player package back when we were working with
Erratics.  While we still have some around, we don't use them often,
and definitely aren't maintaining the erratic_player package.  It
sounds like your package should become the new official way to use an
Erratic with ROS.  You might even just claim the name 'videre_erratic'
for your package, to help people find it.


On Fri, Apr 30, 2010 at 9:19 AM, Antons Rebguns <arebgun at gmail.com> wrote:
> Pablo,
>> Hi ROS users.
>> I was wondering what's the difference between those packages. Both of them
>> have a wiki page but are empty.
> These packages are basically the same, ua_erratic_player is slightly
> modified to work with our own model of erratic mobile base (can be found in
> erratic_description package). We are publishing a single transform from
> "odom" frame to "base_footprint" frame, instead of 3 transforms that
> erratic_player publishes
> ("odom"->"base_link_offset"->"base_link"->"base_laser_link"). I've also
> modified the code so that you can specify topics for odometry and battery
> information in launch files, but these can be removed since we can just use
> ROS remapping mechanism. Other than that they are the same.
> So if you'd like to use our model, I'd suggest also using our modified
> player driver.
>> - erratic_player has a little documented code API but I couldn't find the
>> package folder in the svn repository. Where is it?
> Here is the link to erratic_player source:
> https://code.ros.org/trac/wg-ros-pkg/browser/trunk/stacks/erratic_robot/erratic_player
>> - On the other hand the ua_erratic_player package is a more visible
>> package through google.code but has an undocumented code page.
>> Anyways I've added some documentation documentation to ua_erratic_player
>> (because I could see the source code). Are there any problem with this? :-)
>> Thanks for the ROS project, it's absolutely wonderful. Congratulations!
>> Refs:
>> http://www.ros.org/wiki/erratic_player
>> http://www.ros.org/wiki/ua_erratic_player
> Thank you very much for adding documentation! There's absolutely no problem
> with people contributing docs :)
> Anton
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