ROS Resources: Documentation | Support | Discussion Forum | Index | Service Status | ros @ Robotics Stack Exchange

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.

0

What's this cuboid at rqt_graph? [closed]

asked 2022-11-23 00:34:31 -0600

Renox
27 ●5 ●7 ●11

updated 2022-11-23 05:55:09 -0600

I use robot arm(Ufactory Lite6), and I got rqt_graph.

In the graph, nodes are showed by ellipses and topics are showed by rectangle. However, there are cuboid among them.

what is this cuboid? Please tell me.

At nodes only mode, we can watch "/ufactory/lite6_traj_controller/follow_joint_trajectory/status&goal (rectangle)". At nodes and topics(All) mode, we can watch "/ufactory/lite6_traj_controller/follow_joint_trajectory/action_topics (cuboid)", not "status&goal".

What is the relationship between "status&goal"and "action_topics"? Please tell me.

Nodes only mode. image description

Node and topics(All) mode. image description

edit retag flag offensive reopen merge delete

Closed for the following reason the question is answered, right answer was accepted by Renox
close date 2023-01-14 11:55:30.653738

Comments

Pedantic perhaps, but a cuboid is 3D. rqt_graph is pretty fancy, but it's not a 3D program (yet).

gvdhoorn ( 2022-11-23 09:58:46 -0600 )edit

1 Answer

Sort by » oldest newest most voted

0

answered 2022-11-23 06:30:52 -0600

Mike Scheutzow
4918 ●2 ●430 ●45

updated 2022-11-23 06:32:03 -0600

An ActionServer/ActionClient communicate with each other using 5 ros topics with specific names: cancel, feedback, goal, result, status.

That box is removing clutter from the diagram by not explicitly listing these 5 well-known topic names.

See http://wiki.ros.org/actionlib for a poorly-written description of actionlib.

edit flag offensive delete link

Comments

Thank you for your reply. I understood.

Renox ( 2022-11-23 11:59:55 -0600 )edit

Question Tools

2 followers

Stats

Asked: 2022-11-23 00:34:31 -0600

Seen: 104 times

Last updated: Nov 23 '22

Related questions

ROS Answers is licensed under Creative Commons Attribution 3.0 Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.

Powered by Askbot version 0.10.2