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2019-11-20 10:37:20 -0600 commented answer Weird behavior of GDB with roslaunch

Could be a CWD issue, but I'm not sure.

2019-11-20 08:48:50 -0600 received badge  Rapid Responder (source)
2019-11-20 08:48:50 -0600 answered a question Weird behavior of GDB with roslaunch

This could be due to conflicting stdin/stdout muxing/exclusive access. I typically launch gdb in a separate window (fro

2019-11-20 06:26:43 -0600 commented question tf2 Documentation Needs Work

The infrastructure to generate the documentation would appear to all be there. The quickest way to move this forward wo

2019-11-20 06:20:46 -0600 commented question Fixing yaw keeps overshooting

If you have the possibility, you could look at using the diff_drive_controller from ros_control. It should also support

2019-11-20 06:17:17 -0600 commented question <class 'struct.error'>: 'required argument is not a float' when writing 'data: [x, y]'

Float32 is a message that contains only a single field data, which is a single float32. You cannot assign it a list.

2019-11-20 06:13:46 -0600 commented question roscore on multimachine issue

It would probably be a good idea to show values of ROS_MASTER_URI, ROS_IP, ROS_HOSTNAME and the hostnames and IP address

2019-11-20 02:25:56 -0600 commented question Node exit code -11

It shows same error: Thread 1 "RoverMoveNode" received signal SIGSEGV, Segmentation fault. 0x72901ca8 in ?? ()

2019-11-20 02:24:57 -0600 commented question Node exit code -11

It shows same error: Thread 1 "RoverMoveNode" received signal SIGSEGV, Segmentation fault. 0x72901ca8 in ?? ()

2019-11-20 02:17:31 -0600 commented question TF Error between two machines

@Aviad: please attach your screenshots directly to this question. I've given you sufficient karma for that.

2019-11-20 02:14:21 -0600 commented question ros melodic rviz visualization markers bug

A recent Q&A seems to have reported a similar issue, and it turned out it was a problem with the video drivers. Cou

2019-11-20 02:12:04 -0600 commented question Trying to run rclpy.spin() in thread produces "generator already executing"

I doubt people here will be able to help you without seeing your code.

2019-11-20 02:11:14 -0600 commented answer Architecture of the Navigaton2 stack

you asked and brought my laziness to an end hah ;)

2019-11-20 02:10:27 -0600 commented question Node exit code -11

GDB backtraces are nice, but only really informative if you've compiled your code with Debug symbols enabled. For a Cat

2019-11-20 02:06:59 -0600 commented question How to create rviz display plugin for msg without header?

How to create rviz display plugin for msg without header? this is certainly possible, but: what is your plugin actu

2019-11-20 02:02:55 -0600 commented question rosinstall_generator desktop_full getting packages I don't have installed

How are you invoking rosinstall_generator? Please show exact commands you've used. And an observation: if you've used

2019-11-19 12:49:40 -0600 commented question VelocityStateSensorClient_ReceiveFSM::create_events()

This reads like a very specific question about specific functionality in a specific package. You would have a better ch

2019-11-19 08:58:46 -0600 commented question ImportError: dynamic module does not define module export function (PyInit_PyKDL)

The packages distributed with ROS Melodic are only installed for the system-provided, default Python version. For Ubuntu

2019-11-19 06:25:57 -0600 commented question ImportError: dynamic module does not define module export function (PyInit_PyKDL)

Could be, in that case you'll want to tell us which versions of things you are using. And the output of python --versio

2019-11-19 06:25:23 -0600 commented question ImportError: dynamic module does not define module export function (PyInit_PyKDL)

Could be, in that case you'll want to tell us which versions of things you are using. And the output of python --versio

2019-11-19 06:24:35 -0600 commented question Unable to do a rosservice call from a client machine to a server machine.

"Unable" and "similar discussion" are insufficient descriptions to be able to even begin to help you. Please update you

2019-11-19 06:23:26 -0600 commented question Tf2_ros python docs broken?

Older/related Q&As: #q287826 and (somewhat) #q292684.

2019-11-19 06:21:57 -0600 commented question Tf2_ros python docs broken?

I don't know whether anything is "broken", but the Python bindings of TF2 are just that: bindings. They are almost a 1-t

2019-11-19 06:20:08 -0600 commented question How to pass private parameters to multiple instances of node?

re: MWE in 'mini workspace': we don't need a workspace. The two files are sufficient.

2019-11-19 06:19:39 -0600 commented answer How to pass private parameters to multiple instances of node?

You show this in your MWE: #!/usr/bin/env python import rospy foo = rospy.get_param("~foo") print str(foo) this is

2019-11-19 06:18:42 -0600 edited question How to pass private parameters to multiple instances of node?

How to pass private parameters to multiple instances of node? I have created a package containing a rospy node that I wi

2019-11-19 06:17:10 -0600 commented answer How to pass private parameters to multiple instances of node?

Adding "~" to the beginning of the param name in both or either of the launch or .py does not make a difference. yo

2019-11-19 06:14:05 -0600 commented question Including Publisher/Subscriber/NodeHandle without "ros.h"

I've retagged this rosserial and rosserial_arduino, as roscpp is not used on Arduinos and you mention ros_lib, which is

2019-11-19 06:13:34 -0600 commented question Including Publisher/Subscriber/NodeHandle without "ros.h"

I've retagged this rosserial and rosserial_arduino, as roscpp is not used on Arduinos and you mention ros_lib, which is

2019-11-19 04:46:43 -0600 received badge  Good Answer (source)
2019-11-19 02:43:24 -0600 commented question RViz POINTS color bug or doing something wrong

This appears to be a cross-post of ros-visualization/rviz#1444.

2019-11-19 02:39:55 -0600 commented question Automatic start of the node after system start

What have you found yourself? There are quite a few Q&As about this exact topic here on ROS Answers, so I'd like us

2019-11-19 02:38:58 -0600 commented question ImportError: dynamic module does not define module export function (PyInit_PyKDL)

File "/media/wojtek/48ee3ba1-28bb-493d-b2ff-de733667d003/wojtek/Inz/mybot_ws-base_sensors/src/pyros/DMO.py" this loo

2019-11-19 02:38:52 -0600 commented question ImportError: dynamic module does not define module export function (PyInit_PyKDL)

File "/media/wojtek/48ee3ba1-28bb-493d-b2ff-de733667d003/wojtek/Inz/mybot_ws-base_sensors/src/pyros/DMO.py" this lo

2019-11-19 02:37:34 -0600 commented answer Nodelets general confusion

Isn't this explained on the wiki/roscpp/Overview/Publishers and Subscribers: Intraprocess Publishing page?

2019-11-19 02:34:11 -0600 commented question Please help with simple problem

I'm sorry, but this does not seem to be a ROS-related problem or question. It's a general C++ programming issue at this

2019-11-19 02:32:00 -0600 commented question How to subscriber for a topic in the same callback function of topic?

My first response would be: don't do that. Perhaps if you could explain why you believe you need / want to do this, we

2019-11-19 02:31:22 -0600 edited question How to subscriber for a topic in the same callback function of topic?

How to subscriber for a topic in the same callback function of topic? Hi, I want to get updated new sensor value in cal

2019-11-18 15:29:40 -0600 commented answer ROS 2 custom message build error "abc" package

abc is neither a builtin not a keyword. It is just a Python package distributed with Python as part of the core libra

2019-11-18 15:18:59 -0600 commented answer ROS 2 custom message build error "abc" package

@Dirk Thomas: would it be possible to check for these sort of collisions ahead of time, so as to avoid late user-facing

2019-11-18 15:17:46 -0600 commented question merged map flickers on Rviz

From the wiki page: multirobot_map_merge finds robot maps dynamically and new robots can be added to system at any t

2019-11-18 15:17:30 -0600 commented question merged map flickers on Rviz

From the wiki page: multirobot_map_merge finds robot maps dynamically and new robots can be added to system at any t

2019-11-18 15:16:38 -0600 commented question merged map flickers on Rviz

From the wiki page: multirobot_map_merge finds robot maps dynamically and new robots can be added to system at any t

2019-11-18 14:43:33 -0600 commented question merged map flickers on Rviz

<robot_namespace>/map_merge is a namespace. The map_merge there is not a node. It's just the namespace the map_mer

2019-11-18 14:32:19 -0600 edited question Help with RVIZ for Multiple Husky Simulation

Help with RVIZ for Multiple Husky Simulation I am attempting to run multiple Husky's in a Gazebo environment, with each

2019-11-18 14:16:01 -0600 commented question merged map flickers on Rviz

If I understand the wiki page correctly, there should only be a single instance of map_merge.

2019-11-18 13:40:40 -0600 commented question merged map flickers on Rviz

Just to be extra clear: so namespaces are being used? It's not that each robot is publishing to/map directly? Can you ve

2019-11-18 13:07:20 -0600 commented question Data from Optitrack is not getting streamed properly to vrpn_client_ros

First thing to try is to connect everything using cables. Getting data in bursts ("slowly at times and quick at times")

2019-11-18 12:26:47 -0600 commented question merged map flickers on Rviz

To check (from multirobot_map_merge): First all robots must publish map under <robot_namespace>/map, [..] Is

2019-11-18 12:26:30 -0600 commented question merged map flickers on Rviz

To check: First all robots must publish map under <robot_namespace>/map, [..] Is this the case in your setup