June 2016
Intermediate to advanced
428 pages
9h 15m
English
Content preview from ROS Robotics By ExampleBecome 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 topics also describes some of the features of the rqt tools 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 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 nodes that ...
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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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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.