rviz | ROS 3D Robot Visualizer | Robotics library

I'm working through the rviz tutorials and am trying to figure out how to use the example code "teleop_panel" to draw in the 3d scene. According to the tutorial this should be possible "A panel in RViz is a GUI widget which can be docked in the main window or floating. It does not show properties in the “Displays” panel like a Display, but it could show things in the 3D scene." But I can't figure out how to modify the source code to actually inject data into the 3d scene (like how the IMUDisplay plugin works).

My use case is that I would like to have a way to have some form of rich qt panel (with controls, indicators, etc) that can connect to other ROS topics and draw in the main 3d scene. I don't believe this is possible with the other options (such as a Display plugin) but I could be wrong.

I am trying to install ROS Melodic using the instructions on wiki.ros.org and stumbled upon some problems.

System software information:

Operating System: Kubuntu 21.10

KDE Plasma Version: 5.22.5

KDE Frameworks Version: 5.86.0

Qt Version: 5.15.2

Kernel Version: 5.13.0-19-generic (64-bit)

Graphics Platform: X11

I have first followed steps from http://wiki.ros.org/melodic/Installation/Ubuntu and later followed the steps from https://varhowto.com/install-ros-melodic-ubuntu-18-04/#Step_1_%E2%80%94_Install_ROS_Melodic_repo , both with unsuccessful results.

When running sudo apt update I am getting:

I currently have an Ubuntu docker container to run GUI applications called Gazebo and ROS. I am using Vcxsrv to run the GUIs on my windows host os and am able to display a GUI. However the problem is that I can only display one GUI from one bash of my running docker container at a time as I am able run my first GUI program, Gazebo, in the first docker container bash. But after I run a new bash with "docker exec -it bash" and then run another GUI program, like one called Rviz, I get the error here:

I am trying to get z position of hector_quadrotor in simulation. I can get X and Y axis coordinates but I couldn't get Z coordinate. I tried to get it by using GPS but the values are not correct. So I want to get Z coordinate by using barometer or another sensor.

Here the a part of pose_estimation_node.cpp (You can find full version on github source):

I am working now with the real robot which is turtlebot3 burger. As shown in the rqt_graph below, I've run my custom package which is Im adding the ann3_publisher node to be published to the gmapping package and run in the real robot.

But when I move the robot, it seems that the robot in the rviz application is not moving at all. The map and the robot is there as shown in the figure below but the robot is not moving:

I try to run rosrun rviz rviz on the terminal and add one by one, there is a warning message appear as shown in the figure below

When I run the common package roslaunch turtlebot3_slam turtlebot3_slam.launch slam_methods:=gmapping it works and I dont have this problem. May I know why and how to solve this?

This is my custom turtlebot3_slam.launch file to subscribe the /scan_new3 topic.

Im checking the hector_localization stack, that provide the full 6DOF pose of a robot or platform. It uses various sensor sources, which are fused using an Extended Kalman filter. Acceleration and angular rates from an inertial measurement unit (IMU) serve as primary measurements and also support barometric pressure sensors. I check the launch which is this one

I want the robot on rviz to publish the camera topic. instead of the gazebo. cause I am facing some error spawning the robot in gazebo platfrom.But I don't know why launching the robot on the rviz platform does not publish the camera topic.

ndt_matching succeeded in autoware, but the vehicle model cannot be set correctly.

1. How do I set the correct angle for the vehicle model?
2. What does the frame "mobility" mean?

tf.launch

I would like to generate a point cloud from stereo videos using the ZED SDK from Stereolabs.

What I have now is some rosbags with left and right images (and other data from different sensors).

My problem comes when I extract the images and I create the videos from them, what I get are the videos in some format (e.g. .mp4) using ffmpeg, but the ZED SDK needs a .svo format, and I don't know how to generate it.

Does it exist some way to obtain ".svo" videos from rosbags?

Also, I would like to ask, (once I get the .svo files) how could I get the point cloud using the SDK if I am not able to use a graphic interface? I am working from a DGX workstation by using ROS (Melodic and Ubuntu 18.04) in Docker and I am not able to make rviz and any graphic tool to work inside the Docker image, so I think I should do the point cloud generation "automated", but I don't know how.

I have to say that this is my first project using ROS, ZED SDK and Docker, so that's why I am asking this (maybe) basics questions.

Thank you in advance.