November 2017
Beginner
484 pages
10h 25m
English
Content preview from ROS Robotics By Example - Second EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Introducing rqt tools
The rqt tools (ROS Qt GUI toolkit) that are part of ROS allow graphical representations of ROS nodes, topics, messages, and other information. The ROS wiki lists many of the possible tools that are added to the rqt screen as plugins: http://wiki.ros.org/rqt/Plugins.
The ROS tutorial on the topics also describes some of the features of the rqt tool is at: http://wiki.ros.org/ROS/Tutorials/UnderstandingTopics.
rqt_graph
One of the common uses of rqt is to view the nodes and topics that are active. Bring the TurtleBot up with the minimal launch as previously described. Then, on the remote computer, issue the following command:
$ rqt_graph
Select the top-left box, Nodes/Topics (all). The following screenshot of rqt_graph shows the ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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