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where can I find the parameter in Hydro instead of "velocity" in groovy ??

asked 2014-03-02 07:57:14 -0500

archer0517 gravatar image

when i use hydro to work through TF tutorial. it says There is no attribute "Velocity" in the module.(listener part) and I tried to change it to cmd_vel but it still does not work...... where can I find the parameter in Hydro instead of "velocity" in groovy ?? There may be other parameter changed in Hydro, how can I get them??

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the tutorial's link: http://wiki.ros.org/tf/Tutorials/Writing%20a%20tf%20listener%20%28Python%29 the problem is about line 19 of "nodes/turtle_tf_listener.py"

archer0517 gravatar image archer0517  ( 2014-03-02 08:19:42 -0500 )edit

those tutorials are a bit outdated. You could file an issue: https://github.com/ros/geometry/issues?state=open

brice rebsamen gravatar image brice rebsamen  ( 2014-03-03 15:29:49 -0500 )edit

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answered 2014-03-04 05:12:42 -0500

ahendrix gravatar image

It looks like the command message type in turtlesim has changed from turtlesim/Velocity to geometry_msgs/Twist.

I've updated the tutorial: http://wiki.ros.org/tf/Tutorials/Writ...

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Asked: 2014-03-02 07:57:14 -0500

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Last updated: Mar 04 '14