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Querying topic types in C++

asked 2012-03-13 19:03:59 -0500

Matt gravatar image

updated 2014-01-28 17:11:37 -0500

ngrennan gravatar image

I there a way in C++ to query if a topic exists and if so what message type it uses?

I am trying to write a generic visualization tool and would like to subscribe to a topic using a callback matching the topic's type.

Alternatively a method that accepts all messages but allows me to learn their type in the callback would also work.

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answered 2012-03-13 22:36:59 -0500

dornhege gravatar image

The xmlrpc api should be able to do that. (getPublishedTopics)

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answered 2012-03-13 22:33:35 -0500

Victor Lopez gravatar image

Take a look at shape_shifter in the topic_tools package. http://www.ros.org/doc/api/topic_tools/html/shape__shifter_8h_source.html

You can subscribe to any topic and when a message has been received consult the message type.

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Asked: 2012-03-13 19:03:59 -0500

Seen: 926 times

Last updated: Mar 13 '12