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2018-12-18 09:59:58 -0600 answered a question Generic Pub / Sub; To and from JSON

The first step would require deserialization of the binary message into a protobuf structure. Then you could translate t

2018-12-11 17:02:23 -0600 commented answer Gazebo / URDF human model (with joints, not an actor)

I think you'll have to create your own mannequin, unless someone else chimes in with a model.

2018-12-11 16:51:43 -0600 commented question Gazebo freezes with error [Param.hh:266] Unable to set parameter[acceleration]

You can try upgrading to a newer version of Gazebo, or debug the problem by installing gazebo from source and using a to

2018-12-11 16:48:09 -0600 commented question Physics::Joint::GetAngle() returning incorrect values close to 0

Thanks for the info. Just to confirm, you found a solution to your problem?

2018-12-11 16:42:54 -0600 answered a question How to administrate (spawning and deleting) models synchronously and deterministically for testrun automation?

Your first question is difficult to understand. Are you looking for a function to block simulation update at a particul

2018-12-06 10:57:25 -0600 commented answer Message drops between plugins

There isn't a mechanism that guarantees all callbacks are called. For example, if your callback takes too long to comple

2018-12-06 10:55:30 -0600 answered a question 3D .STL add material -> Model not visible

I think you are mixing SDF and URDF. Check out: http://wiki.ros.org/urdf/XML/link, which contains URDF material examples

2018-12-06 10:51:25 -0600 answered a question ColladaLoader Unable to add material

1) Searching for the material might slow down the loading a bit. You could try profiling the code. 2) We would need to s

2018-12-06 10:49:06 -0600 answered a question Gazebo not setting pose offset provided by world file

There could be issues with your DAE file. For example, the collada file could have units set. For example, take a look a

2018-12-06 10:43:31 -0600 answered a question [ar_track_alvar] - detecting markers of different sizes

If I understand correctly, you'd like to put multiple tags in one world. You should be able to do this by creating multi

2018-12-06 10:36:57 -0600 commented answer Gazebo Transport Systems: Questions about reliability

Messages between nodes in the same process will not show up on wireshark. These messages are transmitted internally.

2018-12-06 10:35:41 -0600 answered a question Message drops between plugins

This is not expected behavior. I haven't looked into this issue, but you could try sending messages using a different t

2018-12-06 10:11:10 -0600 commented question Changing the relative pose of a link in simulation

Can you try first pausing simulation, then setting the relative pose, then unpausing simulation? The physics engine migh

2018-12-06 10:08:42 -0600 commented question Physics::Joint::GetAngle() returning incorrect values close to 0

Can you post your model and steps to reproduce what you are seeing?

2018-12-06 10:06:58 -0600 commented question Link with multiple parent or multiple joint with same child

Can you post your complete model?

2018-12-06 10:05:47 -0600 answered a question Shared variable between two instance of the same model plugin

Plugins are loaded into the same process, and there is no mechanism to alter this behavior. Unless there is someone with

2018-12-06 10:01:08 -0600 commented question Joint->GetVelocity() returns 0 while there is movement

Can you post your SDF model along with the code you are using and step to reproduce what you are seeing?

2018-12-04 22:45:10 -0600 marked best answer Simulation running slow, quarter real time

Gazebo with an empty world runs at 0.25x real time.

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2018-11-20 10:45:41 -0600 commented question Converting URDF to SDF: <preserveFixedJoint> not working

Can you post your URDF file? Also, did the resulting SDF output have fixed joints when using <preservefixedjoint>?

2018-11-20 10:37:22 -0600 commented question Exception sending a message

Is the above terminal output from an Ubuntun 18.04 machine? And, can you post the output of the command: gzserver --verb

2018-11-19 09:49:01 -0600 answered a question Controlling Gazebo simulated robot from moveit (c++)

This tutorial might help you.

2018-11-19 09:44:48 -0600 answered a question High-end system recommendation for vehicle simulations (multi processor vs single processor)

Gazebo will consume one core, or two if you're running the GUI. ROS can potentially use many more, and is dependent on w

2018-11-19 09:40:37 -0600 answered a question Insert model in world file

You can set your GAZEBO_MODEL_PATH environment variable to include another directory containing models.

2018-11-19 09:38:46 -0600 edited question Insert model in world file

Insert model in world file Hey, I have a .world file in which I have added the models. <include> <uri>

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2018-11-16 09:20:07 -0600 answered a question Resources to learn gazebo physics?

There are a set of physics tutorials that you might find helpful. ODE is Gazebo's default physics engine, and you might

2018-11-15 23:13:12 -0600 commented question More realistic shadows

What specific version are you using? Shadows have been significantly improved after 7.9.0: https://bitbucket.org/osrf/ga

2018-11-14 09:26:42 -0600 answered a question How to get the force applied to a link?

Take a look at Link::RelativeForce and Link::WorldForce

2018-11-14 09:23:09 -0600 answered a question Can someone explain contact_max_correcting_vel parameter in the ODE physics engine ?

When two collision objects collide and overlap then a contact is formed. This contact contains information about how far

2018-11-14 09:18:55 -0600 answered a question How to spawn multiple clone of model using msg::Factory?

I think you'll need to change the name of the model. Or, you can upgrade to gazebo8 or gazebo9. Since gazebo8 the factor

2018-11-14 09:12:07 -0600 commented answer Still runaway simulations in gazebo

The inertia and mass values look okay. You could start debugging your problem by inspecting the forces you are applying

2018-11-14 09:03:20 -0600 answered a question Joint and link plugins: do they really exist?

There are no joint or link plugins. You can use a model plugin to apply forces and torques to links to and joints. Refe

2018-11-14 08:55:50 -0600 answered a question laser scan only giving -inf range values

This is a duplicate of this issue. Answers will appear in that issue.

2018-11-13 09:46:49 -0600 answered a question Still runaway simulations in gazebo

That type of behavior can come from a couple places. Have you double checked your inertia values? Look at this tutorial.

2018-11-13 09:32:21 -0600 commented question How to spawn multiple clone of model using msg::Factory?

Can you include the version of Gazebo you are using?

2018-11-09 14:04:11 -0600 commented answer why does RemoveSensor() on sonar sensor during Load() cause a crash?

I haven't tried the new crash. Maybe you should submit an issue for this crash on https://bitbucket.org/osrf/gazebo/issu

2018-11-09 13:38:54 -0600 commented answer Gazebo crashes when trying to launch using static map plugin

I think the problem is in the StaticMapPlugin: https://bitbucket.org/osrf/gazebo/src/f4e51e8f64001beda70615ab8982a7d5a4e

2018-11-07 09:36:03 -0600 commented answer why does RemoveSensor() on sonar sensor during Load() cause a crash?

Yes, there is a problem with the visualization system when a sonar sensor (probably any sensor) is removed during load.

2018-11-07 09:33:25 -0600 answered a question Moment of inertia of a composite model

You might the Inertia class useful. In particular, there is an operator + which could help you solve your problem.

2018-11-07 09:30:01 -0600 commented question How to set wheel joint velocity?

Can you describe what you have tried? Have you also checked that your robot model has good collision and inertia values?

2018-11-06 10:36:08 -0600 answered a question How to adjust the parameter easily,not to modify it in model.sdf and reboot my gazebo?

You can write a plugin to change values of a sensor.

2018-11-06 10:34:26 -0600 answered a question Simulate Manufacturing processes ?

Yes, you can control robot arms and move objects around in simulation. You will need to setup the simulation environment

2018-11-06 10:30:46 -0600 edited answer Where is the laserShape in the ray sensor defined?

Each physics engine implements a ray shape. For example, here is ODE's ray shape. You really only need to worry about t

2018-11-06 10:15:26 -0600 answered a question How can I control a simple model using the keyboard?

The question you asked has multiple solutions and is a bit open-ended. I suggest you take a look through the Gazebo tuto

2018-11-06 10:06:53 -0600 answered a question why does RemoveSensor() on sonar sensor during Load() cause a crash?

Thanks for the link to your code. One problem I noticed is the plugin (libgaz.cpp) iterates over all robots during load.

2018-11-05 15:50:06 -0600 answered a question Gazebo Baxter simulation catkin-make failed

You might be running into version problems. I think the baxter simulation environment requires Ubuntu 14.04: http://sdk.

2018-11-05 15:43:02 -0600 answered a question Turning off backface culling for a model [Gazebo9]

I don't think you can combine a material script with material information contained inside a collada file. Just brains

2018-11-05 15:35:23 -0600 commented question Gazebo Baxter simulation catkin-make failed

Can you post the steps needed to reproduce your problem, including OS type and version? Also include links to documentat