Attention: Answers.ros.org is deprecated as of August the 11th, 2023. Please visit robotics.stackexchange.com to ask a new question. This site will remain online in read-only mode during the transition and into the foreseeable future. Selected questions and answers have been migrated, and redirects have been put in place to direct users to the corresponding questions on Robotics Stack Exchange. Additional details are available here.

Different between private node handler and not private

melodic

asked 2019-07-18 10:29:48 -0600

Elric
71 ●34 ●40 ●45

I'm using ROS melodic and Gazebo 9.9.0 on an Ubuntu 18.04.2 LTS.

I've been reading this: http://wiki.ros.org/roscpp/Overview/N..., but I don't understand what is (or are) the different between this two declarations:

ros::NodeHandle n;

And

ros::NodeHandle n("~");

What are the different between a private and a not private node handler?

edit retag flag offensive close merge delete

add a comment

1 Answer

Sort by » oldest newest most voted

answered 2019-07-18 16:34:32 -0600

stevemacenski

8272 ●34 ●503 ●129 https://www.linkedin.c...

The first will look for your parameter in the global namespace (ei it will find /my_param) the second will look under the nested namespaces of the node itself (ei it will find /namespace/my_node_name/my_param).

You can still find the local namespace copy of that parameter with the global nodehandle, but you will need to type in alot more information.

edit flag offensive delete link

add a comment

Question Tools

1 follower

Stats

Asked: 2019-07-18 10:29:48 -0600

Seen: 755 times

Last updated: Jul 18 '19

Different between private node handler and not private edit

1 Answer

Question Tools

Stats

Related questions

Different between private node handler and not private