On Mon, 19 Apr 2010 19:26:17 +0200, Tully Foote <tfoote@willowgarage.com>
wrote:
Hi Tully,
> Dan,
> I think your problem can be solved by settting the parameter
> /use_sim_time
> to true. This will make ros::Time::now() return simulation time as
> broadcast by the bag file or stageros or gazebo on the /clock topic,
> instead
> of the system time. For more info see http://www.ros.org/wiki/Clock
>
> Tully
I already set /use_sim_time in my launch file to true and "rosparam get
/use_sim_time" returns true. So this did not help.
However, this lead me to finding a stupid mistake I made:
What I have is carmen logfile I playback using the carmen module
play_carmen.
I created a ros node (carmen_ros_proxy) which subscribes to carmen
messages and republishes them as ros messages keeping the original carmen
timestamp.
I then recorded a bag file by calling rosbag -a containing my republished
sensor readings.
However, this bagfile does only record the clock at the time I
played the messages back but not the clock at the time the messages where
originally sent (of course).
I tried playing back the carmen log file and calling the costmap node
while running carmen_ros_proxy. Now I get no warnings but also no laser
callbacks.
So I guess I need to publish the /clock message (how?) in my
carmen_ros_proxy or something like that?
Sorry for the confusion,
Dan