waitForMessage functionality for TimeSyncronizer

asked 2011-09-05 15:02:36 -0500

dk
104 ● 3 ● 6 ● 13

updated 2011-09-23 05:53:51 -0500

I am interested to get new sensor values (published to a topic) while in a service callback. For a single topic I was able to do this using ros::topic::waitForMessage. Unfortunately I am actually looking for a pair of images + camera information (4 topics in total) that I synchronize using message_filters::TimeSyncronizer. Is there a way to wait (block) for the next synchronized set while in a service callback?

Thanks

edit retag flag offensive close delete

1 Answer

Sort by » oldest newest most voted

answered 2011-09-16 14:22:27 -0500

Wim
2250 ● 5 ● 26 ● 40

There is no 'shortcut' such as ros::topic::waitForMessage for the message time synchronizer. You'll have to construct your own mechanism where you connect to the topics from the service callback, and monitor the callback of the time synchronizer.

edit flag offensive delete publish link

Comments

I tried this but it did not work. The callback (given to TimeSyncronizer) does not get called while the service callback is active. Looking at the implementation of waitForMessage it seems I need to specify a different CallbackQueue, but I could not figure out how to do this for TimeSynchronizer. dk ( 2011-09-23 05:50:27 -0500 )edit

Question tools

Stats

Asked: 2011-09-05 15:02:36 -0500

Seen: 224 times

Last updated: Sep 16 '11

waitForMessage functionality for TimeSyncronizer

1 Answer

Comments

Your answer

Question tools

Stats

Related questions