All Questions
46 questions
0
votes
0
answers
9
views
How to Ensure Consistent Reference Frames for Comparing Odometer and Camera Angle Data in ROS Noetic?
In my ROS Noetic project of a vehicle with a camera and odometer, I'm planning to compare the vehicle's position from the odometer with the desired angle or direction detected by the camera. However, ...
0
votes
1
answer
72
views
TF get the time of last transform
Hello!
I want to check if the tf2_ros::Buffer received a valid transform from A to B in the last x seconds (to throw an error in case of time out). So something like ...
labude
0
votes
1
answer
64
views
tf not found using python in ros noetic
Hi
I have followed the tutorial here to find a transformation between 2 frames using Python in ROS Noetic, but I can't get it even though I'm sure the tf exists because I can find it in the terminal.
...
robra
0
votes
2
answers
132
views
tf2_ros lookup_transform giving wrong transformation
Hello everyone,
I want to get the transform from tool0 frame to base_link frame of the UR3 robot but I'm having problems.
Below ...
- 168
0
votes
1
answer
56
views
need to get tf2_ros to work in python3 environment for Melodic
I need tf2 to work in python3 environment in ROS melodic. I saw a similar question here for ROS kinetic, I need the same thing for melodic. Please help.
Originally posted by distro on ROS Answers ...
distro
0
votes
1
answer
658
views
ros2 lookupTransform() to get latest transform
Hello all,
In foxy tf2_ros::Buffer::lookupTransform(),
...
jxl
0
votes
1
answer
63
views
creating the map with only Lidar
I am using, ROS Noetic + 20.04.
Lidar hardware: rplidar_a3m1
I installed slam_toolbox ...
amjack
0
votes
1
answer
180
views
[ROS2 Foxy] loading static transform broadcaster arguments from config file
In one of my launch files I have a number of tf2 static transform publisher calls like
...
morten
0
votes
1
answer
89
views
TransformListener x10 higher CPU load in rclpy than rclpp
System info
Operating System:
Docker + Ubuntu 20.04, 10th gen i7
Docker + Ubuntu 20.04, jetson AGX Xavier
ROS2 Version:
Foxy binaries
Steps to reproduce issue
Make sure the system is publishing ...
charlie92
0
votes
1
answer
25
views
Segmentation fault on tf2_ros
I am using slam_toolbox with arm64 architecture.
But I encount SIGSEGV.
How do I fix this error?
backtrace:
...
Kazunari Tanaka
0
votes
1
answer
77
views
Get valid frames from `tf2_ros.Buffer` based on `cache_time`
tf2_ros.Buffer offers a cache_time argument in both C++ and Python implementations.
C++ doc
Python code
However, on calling ...
kunaltyagi
0
votes
1
answer
68
views
tf2_ros: AttributeError: 'Buffer' object has no attribute 'destroy_subscription'
Hi there,
I'm new to ROS and am working through all the tutorials. Right now, I'm working on the tf2 package's tutorials; however, I'm getting stuck on writing a tf2 listener (see: http://wiki.ros.org/...
FKNoble
0
votes
1
answer
15
views
ROS2 Eloquent TF listener (tf_echo) values freeze/resume on a cycle unexpectedly
Ubuntu 18.04
ROS2 Eloquent
TF
C++
###My pipeline:
I have a robot which uses sensors to detect the rotation, extension of its joints. It has revolute, prismatic, and fixed joints in a URDF file. Yes, ...
ateator
0
votes
2
answers
90
views
tf2_ros::Buffer.transform() missing timestamp
Hello everyone
I use tf2_ros::Buffer.transform() to transform a geometry_msgs::WrenchStamped into a...
dimitri
0
votes
2
answers
208
views
[ROS2] tf2 broadcaster
Hello,
I'm currently working on a differential drive robot with ROS2 and encountering some errors with a rclcpp transform broadcaster. I hope i can get some answers as to what I am doing wrong. I'm ...
Loekes
0
votes
1
answer
145
views
Using python modules from ROS2 packages
Hi,
I am using ROS2 dashing and I want to work with the geometry2/tf2_ros package which is available at https://index.ros.org/p/tf2_ros/#dashing.
I am sure this is a very basic question, but I am ...
svintissen
0
votes
1
answer
52
views
Configuring TF tree for a system that inherently uses NED (North-East-Down) convention?
I know how to perform transforms between an ENU and NED frame (a simple static flip) but my question here is more of how do I configure the TF tree if the existing codebase assumes everything as NED (...
hashirzahir
0
votes
1
answer
64
views
TF2 ConnectivityException With Connected TF Tree
I'm getting the following error about missing frames, but when I view the TF tree, it shows as a single connected tree. The same error occurs no matter which two frames I use. I don't have enough ...
rwbot
0
votes
2
answers
59
views
[ROS2]Are there any examples of tf2 broadcast or listener
Hello comrades, I`m just trying to get odometry from t265 from realsense2_lib examples. After compiling and running this code below, I get that target frame does not exist.
Thanks in advance.
...
Sol
0
votes
1
answer
4
views
Support for ROS2 Dashing along with python3
I have built the geometry library for my project using colcon for ROS2 Dashing and Python 3 and sourced it using ...
shikharvaish28
0
votes
1
answer
133
views
Could not find waitForTransform() function in TF2 package of ROS2
We are working on laser_filters package porting to ROS2 in that waitForTransform() method is used but I could not find similar method in ROS2 crystal/bouncy.
Originally posted by vandanamandlik on ...
vandanamandlik
0
votes
1
answer
17
views
How to migrate tf data types such as Quaternion, Vector3, Transform to tf2?
There is not much mentioned about tf2 datatypes on tf2_ros documentation at http://docs.ros.org/latest/api/tf2_ros/html/c++/.
While comparing to http://docs.ros.org/latest/api/tf/html/c++/, we don't ...
cybodroid
0
votes
1
answer
15
views
Is there an easy way to publish a static transform between leaves of two tf2 trees?
This is similar to the question:
https://answers.ros.org/question/58639/what-is-the-correct-way-to-connect-two-tf-trees/
That was five years ago. Can we do better today?
Given a tree:
...
Andy III
0
votes
1
answer
11
views
tf2 Documentation Needs Work
As we get ramped up on our own ROS environment, we've found the tf2 implementation extremely hard to understand. So this is a bit of a plea for folks who understand it well, to improve the tutorials, ...
vschmidt
0
votes
1
answer
51
views
TF2 how to translate vector in Python?
Hi everyone,
I think I'm experiencing a severe blackout right now...
A short one: in Python, how do I translate a 3D vector (a numpy array) from one TF2 frame to another considering position and ...
Hendrik Wiese
0
votes
1
answer
46
views
class construction error when using tf2_ros::Buffer
Hi all,
I am trying to use tf2_ros::Buffer in a simple code. When I put it in the main function, everything works fine. But when put in a class, building error occurs. The code is like this:
...
arkin
0
votes
2
answers
269
views
transform pointcloud with tf2
Hello,
I have two tf2 frames in ROS "World" and "Robot" the world is on position 0, 0, 0 and the Robot is on different position, it is a moving robot, but for now let say he is on ...
MrC11
0
votes
1
answer
47
views
How can I access all static TF2 transforms?
I have two nodes who each publish a single static TF2 transform (each with a different child frame) via tf2_ros.StaticTransformBroadcaster.sendTransform upon startup. These are essentially ...
BJP
0
votes
2
answers
3
views
import tf2/StaticTransformPublisher in Python
I'm following this tutorial[1] and having trouble with importing.
[1] http://wiki.ros.org/tf2/Tutorials/Writing%20a%20tf2%20static%20broadcaster%20(Python)
...
- 4,294
0
votes
2
answers
231
views
tf2_ros buffer transform PointStamped?
I'd like to transform a PointStamped using a python tf2_ros.Buffer, but so far I'm only getting type exceptions.
The following ...
- 3,397
0
votes
1
answer
30
views
TF Listener for static transforms exclusively
Is there a way to listen to only the static transforms in a TF tree (e.g. base_link --> base_laser_link) without instantiating an entire ...
spmaniato
0
votes
1
answer
11
views
Is there a max number of edges allowed between two frames in a TF tree?
I have a pose graph of about 2000 nodes published as static transforms with tf2_ros::StaticTransformBroadcaster.
Currently, the poses are chained together as a path,...
- 818
0
votes
1
answer
19
views
tf2 stamped datatypes tutorial fails to build
I'm trying to walk through the tf2 tutorials following the instructions here: http://wiki.ros.org/tf2/Tutorials/Using%20stamped%20datatypes%20with%20tf2%3A%3AMessageFilter
Trying to build the source ...
eddy.scott
0
votes
1
answer
12
views
How to substitute TF2 prefix
Hi,
I have seen that tf_prefix support is deprecated in TF2. What is the proper way now of having the same functionality? That is, I have two robots, robot1 and robot2, and I want the TF frames to ...
Javier V. Gómez
0
votes
1
answer
50
views
tf2 tutorial writing broadcaster -- compile error
Hi,
I'm following the tutorial at http://wiki.ros.org/tf2/Tutorials/Writing%20a%20tf2%20broadcaster%20%28C%2B%2B%29
I copy-and-pasted the code, made changes to CMakeLists.txt, but I see this error ...
nitekrawler
0
votes
1
answer
117
views
TF_OLD_DATA ignoring data from the past for frame openni_depth_optical_frame
Hi,
I need to play my bagfile with the -l loop parameter. However after the time is reset, I get a lot of these errors:
...
J.M.T.
0
votes
1
answer
46
views
tf2, thread, setUsingDedicatedThread, timeout
I'm migrating part of my code to tf2. Big chunk of my code is library that can run online or offline, so I pass at construction time a reference to a tf2_ros::Buffer object. It is then used to lookup ...
brice rebsamen
0
votes
1
answer
55
views
Again a Migration Question From TF to TF2
Hi all,
at first, I am sorry if this question might be a duplicate, however I didn't find a clear answer while searching this forum.
So I decided to migrate my code from TF to TF2. I encountered lots ...
Karsten
0
votes
1
answer
73
views
tf2 buffer_server timeout and buffer size
I'm starting the buffer_server with
rosrun tf2_ros buffer_server
I've seen in its source code on github that one can specify the buffer size through the parameter ...
gaya
0
votes
1
answer
8
views
Error tf2_ros StaticTransformBroadcaster API in Python
Update:
In an attempt to get around losing the ability to pub latch transforms in the API in python I have tried doing the following which does not seem to work. Anyone have a way to do this? And in ...
rnunziata
0
votes
1
answer
16
views
Is there a good tf2 tutorial?
Hi there,
Trying to use tf2 with hydro here, however I just can't get the tutorials to work. For the broadcaster, the C++ tutorial is missing. For the listener, there is a structure that seems to be ...
Guido
0
votes
2
answers
132
views
tf transformPoint() equivalent on tf2?
It used to be that, with tf, we would use a TransformListener and its transformDATA() methods, e.g.
...
ssafarik
0
votes
1
answer
2
views
tf to tf2 SendTransform type error
I am working on some forked code that is setup for tf and on my BeagleBone Black I only have tf2. I have most of the code working but it is erroring out on sendtransform with
TypeError: sendTransform()...
MobileWill
0
votes
2
answers
10
views
Why cant initialize tf2_ros::TransformListenter in hydro?
When I try to compile node with folowing lines (this is only a part of code):
...
- 588
0
votes
1
answer
2
views
Groovy Installation - "Failed to process package 'tf2_ros'" in "catkin_make_isolated" - MacBook OSX
After resolving the dependencies in the installation of groovy on a MacBook Pro with OS 10.8.3, I input the command
./src/catkin/bin/catkin_make_isolated --install
...
jjameson18
0
votes
1
answer
1
view
Issue building tf2_ros on OSX
I'm running into this problem while trying to build tf2_ros on OSX:
==> make -j4 -l4 in '/Users/Yeison/ros_catkin_ws/build_isolated/tf2_ros'
Linking CXX shared library
/Users/Yeison/ros_catkin_ws/...
Yeison Rodriguez