gbohus's profile - activity

I need the size of a custom array msg type. (The type is geometry_msgs/PoseStamped[] PoseStampedArray.) I need to iterate on the msg if it is not empty and I would very much like to get the last element without iterating on the whole thing.

I must be missing something because these look like basic things one should be able to do.

From the comments of @tfoote, @gvdhoorn and @mike-scheutzow I think I understand what is going on. Published transform

Thanks @gvdhoorn and @tfoote, the qualification "consistent across the full spanning set" is crucial and makes everythin

Got it, thanks.

Thanks tfoote. The funny thing is I don't ask for extrapolation to the future. (Even if I did, "last available" _is_ w

Thanks Mike. I did not realize the tf buffer was limited to such a short period even when there are no new tf's coming.

low frequency transformations Hi all, We have a situation where two coordinate frames very rarely change relative to ea

Conclusion from the discussion: There seems to be no such thing, but it would not be very useful anyway.

Thanks @tfoote. I am using the exact same timestamp, but it's true, as @kscottz and you both implied, there should not b

Yeah, sorry about that. It's dynamic, otherwise I wouldn't worry about efficiency. I _think_ that lookupTransform has

inverse transform Hi all, Given two coordinate frames, A and B, I need to use both transforms that go between them for

Thanks for the clarification. Just a small comment: in linear algebra "homogeneous" means mapping zero to zero. What you

I found this works for me. Start ROS, but not your nodes. Start using simulated time: rosparam set use_sim_time true

I found this works for me. Start ROS. Start using simulated time: rosparam set use_sim_time true Start your nodes.

I found this works for me. Start ROS. Start using simulated time: rosparam set use_sim_time true Start your nodes.

Start ROS. Start using simulated time: rosparam set use_sim_time true Start your nodes. Start playback: rosbag pla

tf2::doTransform linking error Hi all, I get wall_point_generator.cpp:(.text+0x19d1): undefined reference to `void tf

I'm not sure if this is the canonical way, but I changed the script to ts=`date +'%Y-%m-%d-%H-%M-%S'` /opt/ros/melodic/

nearly duplicate log files Hello, Setup: ROS Melodic, Ubuntu 18.04 Many of my nodes produce two log files in .ros/log/

How do I avoid writing into /var/log/syslog? Hey, Setup: Ubuntu 18.04, ROS Melodic I have a script in /usr/sbin/ which

So it seems that a somewhat older version of realsense-ros might have had a problem. Updated yesterday to the current ve

So, updating the realsense_ros package did the trick, although I had some problems there as well. (Don't want to diverge

Thanks. I'll look at these and report back.

To comment on my own comment: I tried two other firmware versions and they did not make any difference.

Thanks matlabbe. Indeed, the frame_id keeps switching back and forth, both for linear_interpolation and for copy. I'm

rtabmap realsense imu frame id changed Hi all, I am running rtabmap as described in http://wiki.ros.org/rtabmap_ros/Tut

rtabmap realsense imu frame id changed Hi all, I am running rtabmap as described in http://wiki.ros.org/rtabmap_ros/Tut

Crazy, but true, thank you 8). I also noticed that the first whitespace after the type has to be space, after which you