amcl not publishing map -> odom under different namespace
Hello, I'm attempting to setup a pair of turtlebots that can run simultaneously, and in order to do so, they need to run their nodes on different namespaces while both subscribing to a shared /map...
View ArticleRviz use last tf (transform) message for creating visualization
I have a map frame, a camera frame and a robot frame. The transform between map frame and the camera frame is fixed and gets published occasionally, ~10 seconds irregular intervals. The transform...
View ArticleWheels have no transform to base_link - Real robot
Hello, I'm trying to bring up my robot and everything is set up except from the wheels. Meaning that when I open Rviz everything is in place except from the 4 wheels that do not have a transform to...
View ArticleUse transformation from another node
Hi everyone, I am trying to use frames that have been already created in another node in my node to do a transformation from a plan to another, but it seems that I have missed a step because then my...
View Articletf2 sendTransform() not actually sending anything
I'm trying to send a transformation from "world" to "base_link" based on coordinates I get from a different node. The node is actually running, and it is reaching the ROS_INFO() right before the...
View Article`tf static_transform_publisher` removes link instead of linking two tf trees
When using `static_transform_publisher`, attempting to link to coordinate systems via a common frame the publisher removes the link from one tree and places it in the other. This happens both with `tf`...
View ArticleSetting up a pure GPS IMU flying camera system
I am trying to setup a camera system that will log its position. The system will be passive, and is attached to an airplane. The system has a GPS sensor as well as an IMU. I want to use transforms to...
View ArticleTransform camera frame to 3D point
Hi all, I am work on kitti dataset. How can transform detected object over camera frame to 3D point cloud coordinate ? Thanks in advance!
View ArticleAruco Detection: operating the inverse of the Pose results in strange value...
Hello, i'm currently detecting the ArUco Marker with the help of the ros_aruco package. The detection works perfectly, i assume. by doing: `$ rostopic echo /aruco_single/pose` we obtain header: seq: 14...
View ArticleRotate the coordinates of IMU
Hey, I'm using a imu but the problem is that the coordinate frame is wrong. y/roll is pointing to north, x/pitch is pointing to east and z is down. But I have to rotate it 180° to the positive side by...
View ArticleHow to setup tf frame for /laser_scan msg to display in rviz
I have setup my laser properly, able to display a topic called laser_scan, However when i display it on rviz, there was no visual display, despite having receiving messages and with no error received....
View Articlehow to fix very low frame publish rate of turtlebot
Hi all, I'm trying to use moveit it to control a turtlebot arm mounted on turtlebot. When I run my moveit.launch file, there's always a transform error: [ERROR] [1543219008.768123467]: Transform error:...
View ArticleHow to transform the whole /tf frame?
Given I have an occupancy grid map which I would want to transform with a certain [tx,ty,theta] transformation. How do I do it? The tf tree is posted below and also the rviz which contains the grid...
View Articlerobot_localization transform functions for move_base?
Hi, I am curious as to the coordinate frames that my odometry data is in after using the robot_localization package ekf as a localisation estimator? I am using wheel odometry and an IMU in a...
View ArticleIm trying to transform a pointcloud (rotation along z) using the following...
#include #include #include #include void callback(const sensor_msgs::PointCloud2ConstPtr &cloud_msg) { ROS_INFO("Message recieved:"); //msg to c string Eigen::Matrix4f transform_1 =...
View ArticleWhy is inverse transform tf so wrong?
While trying to get the base_link footprint of the robot in utm coordinates, we discovered hughe jumps in the utm position. But in the simulation, the real change was only in the millimeter range. We...
View ArticleHow to transform laserscan messages
I have a laser and I want to tranform with tf. Its message type is LaserScanner but I don't know how to do it. Do you have an example how to solve it?
View ArticleTF Listener
I want to create a class tf_listener. I'm using a laser, so the node for the laser data already exists. I looked at some tutorials and saw that they are using pointstamped. But my laser publishes with...
View ArticleProblems with tf
I'm trying to use google cartographer and in order to I have to build a tf. I didn't fully understand the idea of tf. I have a robot and a laser. I constructed the tf like here...
View Articledo i need to build a base frame
in tutorial, there's a base frame called 'world', I wonder whether this base frame is defined by the system, or i need to build it in some way? i mean, if I want to define a transform from a base...
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