Interactive Marker with rosbag "ROS Time moved backwards"
I'm using rqt_bag to visualize a rosbag in RViz. Independently of that, I publish a interactive marker that changes colors based on a topic being published. This works well, until I move backwards in the rosbag, then the interactive marker throws an exception because the ROS time moved backwards. Specifically, the sleep() method in the rospy timer ( http://docs.ros.org/jade/api/rospy/ht... ).
I've tried changing the interactive marker header stamp to rospy.time.now() and I've tried just a static non-changing time.
I've also tried deleting the interactive marker whenever I go backwards in time, but the error procs before I can delete the marker.
Am I trying to do something that is not possible with the way Interactive Markers work?
I have use_sim_time set to true and --clock set.
Thanks
I also get the "ROS time moved backwards" when trying to use
rospy.sleep()withrosbag play -l, and I finally get around it by usingtime.sleep()instead.I've converted your answer to a comment, as what you propose is not really a solution:
rospy.sleep()uses ROS Time, whiletime.sleep()uses walltime, which may not be the same (fi if you're playing a bag, or using a simulator).