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2021-12-06 19:39:30 -0600 answered a question "gzserver: symbol lookup error" (not ignition problem) when launching Gazebo v9.19 in Ubuntu 18.04

Gazebo 9.19 needs libsdformat6 >= 6.3.0. It should have been installed when installing/upgrading the gazebo9 package

2021-12-01 22:13:48 -0600 answered a question How to use depth camera plugin in Ignition

Here's an example that uses a depth camera sensor: https://github.com/ignitionrobotics/ign-gazebo/blob/ign-gazebo6/examp

2021-11-30 12:29:19 -0600 commented question Error [parser.cc:403] Error parsing XML in file [/home/en/velodyne_plugin/build/../velodyne.world]: Error reading end tag. [Err] [Server.cc:479] Unable to read sdf file[../velodyne.world]

Can you post the full velodyne.world file here?

2021-11-29 12:51:00 -0600 commented question How to get rid of LCP internal error s<=0, not s=0.0000 (ODE message 3)?

Are the collision shapes for the wheels (sphere and cylinder) meshes or simple shapes in the SDFormat file? If you're us

2021-11-29 10:13:58 -0600 commented question "gzserver: symbol lookup error" (not ignition problem) when launching Gazebo v9.19 in Ubuntu 18.04

This looks like a version mismatch between gazebo and libsdformat. Can you tell me which version of libsdformat you have

2021-11-22 19:07:26 -0600 answered a question Bash autocomplete does not work in ignition 6.1

Tab completion for the ign tool is not implemented yet. See https://github.com/ignitionrobotics/ign-tools/issues/1

2021-11-11 23:34:36 -0600 answered a question A link has invalid inertia

The principal moments of the inertia must satisfy the triangle inequality. In your case iyy + izz < ixx, which is inv

2021-11-11 23:01:19 -0600 answered a question Controlled wheel slips under external force

If the controller is able to apply unlimited effort, it might be counteracting the torque on the wheels due to friction.

2021-11-10 16:27:32 -0600 commented question actuators msg ign_ros_bridge

The section of code for working with mav_msgs/msg/Actuators is commented out in the ros2 branch. See https://github.com/

2021-11-10 16:20:23 -0600 commented question Cannot spawn my urdf file in gazebo

The launch file you posted has -udf instead of -urdf. Could that be the issue?

2021-11-09 12:42:27 -0600 answered a question https://github.com/osrf/gazebo account quota

Thanks for reporting this, but the osrf/gazebo repo doesn't use lfs, so I don't think this is an issue. It's sufficient

2021-11-09 12:23:31 -0600 answered a question Simulate closed chains in ignition gazebo (citadel)

Closed kinematic chains are currently not supported. See https://github.com/ignitionrobotics/ign-physics/issues/25

2021-08-23 11:10:01 -0600 commented question Is libcuda required to run Ignition?

I don't think you need CUDA. Is the simulation not running at all? Can you paste the error logs?

2021-08-16 14:15:29 -0600 edited answer Ignition Gazebo: set joint position

It's generally not recommended to the set the joint position on a continual basis since it can cause the physics engine

2021-08-16 14:13:10 -0600 answered a question Ignition Gazebo: set joint position

It's generally not recommended to the set the joint position on a continual basis since it can cause the physics engine

2021-08-12 11:16:27 -0600 commented answer Why is the model "head" kept falling down through the another model "chassis"?

If you run gazebo --verbose, you might get an error message indicating what went wrong. My guess is the joint <child&

2021-08-09 17:14:22 -0600 commented question robot teleporting to origin with broken joints

I pulled the latest changes and tested it locally with speed 10 and steering angle 0.5. SI'm not seeing any issues

2021-08-06 15:24:37 -0600 commented question robot teleporting to origin with broken joints

I couldn't replicate the problem locally. Can you provide the steps I'd follow to do to see the issue?

2021-08-05 12:31:14 -0600 commented question How to declare child link for joint when link is in embedded model

What version of Gazebo are you using? Also, can you attach the model file so it's easy to reproduce?

2021-08-05 12:18:57 -0600 commented question robot teleporting to origin with broken joints

Is there a chance you're sending nan or inf values by accident?

2021-02-02 23:04:01 -0600 answered a question SDF model not loading properly in ignition gazebo

I think it might be having problems locating the included model in the world file. Included resources are handled differ

2021-02-02 11:07:10 -0600 commented answer Bounce in Ignition/DART

This has now been fixed in Ignition Citadel. https://github.com/ignitionrobotics/ign-physics/pull/139

2021-01-08 16:24:35 -0600 commented question Revolute2 vs Universal joint?

I don't believe so. If you see dJointAddHinge2Torques, it takes only two torques, same as dJointAddUniversalTorques.

2021-01-08 15:00:35 -0600 commented question Revolute2 vs Universal joint?

I believe the translation you're referring to for Revolute2 is a parameter, not a DOF. i.e, the two axes of a Revolute2

2021-01-06 16:27:05 -0600 answered a question what does pose element mean under model element?

In SDFormat, the pose of any element when no frame is specified is the pose with respect to the parent frame. The parent

2020-12-21 12:43:46 -0600 answered a question DART Sphere behaves like a Cube

This is caused by the fact that DART, by default, uses the FCL collision library with a configuration that changes simpl

2020-10-08 17:10:41 -0600 answered a question What does <axis><xyz expressed_in="some_frame"> mean, and how can I check my math with Gazebo?

I think your calculation is correct. Unfortunately, you might have uncovered a bug in the way Gazebo11 visualizes axes.

2020-07-16 10:20:41 -0600 answered a question Bounce in Ignition/DART

Unfortunately, this is not yet supported in ignition. I have created an issue for it in https://github.com/ignitionrobot

2020-07-06 09:47:56 -0600 answered a question What is difference between running gazebo with and without the client?

Both the server and the client do 3d rendering. The server does it to generate sensor data (eg. cameras). The GUI uses i

2020-06-01 10:59:24 -0600 answered a question IMU topics not being published from X3 UAV model

The model contains the <sensor> tag, but at the moment, ign-gazebo requires you to add the IMU system to the <w

2020-03-11 11:01:28 -0600 commented answer Sliding problem with stack of boxes

I did a quick test on this where I put a prismatic joint between the world and the bottom box. The boxes move together (

2019-05-31 14:01:45 -0600 commented question Vehicle moves in RVIZ but not in Gazebo? Using ros_control with the four_wheel_steering_controller

Did you try commenting out line 6 and uncommenting line 3?

2019-05-30 10:42:49 -0600 commented question How to set gazebo master uri in roslaunch file?

I'm surprised that setting GAZEBO_MASTER_URI on the shell is not working. Are you exporting the variable? Can you provid

2019-05-30 10:35:58 -0600 answered a question How to include ignition math library in CMakeLists.txt?

Ignition math provides cmake package configuration files so, assuming you're using version 6, you can call find_package(

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2019-05-11 19:15:54 -0600 commented answer Still runaway simulations in gazebo

Have you tried setting higher damping values with implicit_spring_damper set to 1?

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2019-05-07 10:03:56 -0600 answered a question Still runaway simulations in gazebo

Another thing to consider is your joint damping. Some of the values in your example (test2) have a joint damping of 0.5.

2019-05-06 20:03:22 -0600 commented question libdart version issue with gazebo build from source

Can you try building gazebo again? Looks like it was built with libdart 6.7 but the installed libraries are 6.8.

2019-01-16 18:33:44 -0600 commented question How to ensure position limits in EffortJointInterface

Can you post a working example? In the mean time, can you make sure there is no conflicting limits specified in the cont

2019-01-08 09:45:13 -0600 answered a question Unexplainable slowdown over time

I think the preferred way of deleting a model is by sending an entity_delete request. I believe this avoids various race

2019-01-07 17:55:33 -0600 commented question Unexplainable slowdown over time

Any reason why you're using Model::Fini instead of World::RemoveModel?

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2018-12-28 10:16:44 -0600 edited question Simulated robot is building a tower of blocks in Gazebo 7, blocks are sliding

Simulated robot is building a tower of blocks in Gazebo 7, blocks are sliding I'm trying to have a Sawyer robot build a

2018-12-26 20:51:53 -0600 answered a question Robot is levitating in Gazebo

My guess would be the args="-z 1.0" on https://github.com/lukewebdev/SCARA-52900/blob/263a49f74629f037b894347d42b3e13a6c

2018-12-26 17:46:56 -0600 commented question Adding Color and Textures to a Model

http://gazebosim.org/tutorials?tut=color_model#ColorHeadUsingaColladawithaTexture describes how to add the texture to th

2018-12-26 17:46:31 -0600 commented question Adding Color and Textures to a Model

This section describes how to add the texture to the dae file. Did that not work for you?

2018-12-26 16:26:29 -0600 answered a question Gazebo not publishing joint_state topic

I believe the problem is coming from the <robotNamesapce>panda</robotNamespace> in your urdf. tl;dr: You n

2018-12-26 13:42:28 -0600 commented question Adding Color and Textures to a Model

http://gazebosim.org/tutorials?tut=color_model#ColorHeadUsingaColladawithaTexture describes how to add the texture to th