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2019-03-01 08:15:36 -0500 received badge  Famous Question (source)
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2018-03-26 15:10:15 -0500 answered a question How to resolve undefined symbol referenced from my plugin for ray sensor?

Just for reference, I got it working by including the following in the CMakeLists.txt. link_directories(${GAZEBO_LIBRAR

2018-03-26 14:34:41 -0500 asked a question How to resolve undefined symbol referenced from my plugin for ray sensor?

How to resolve undefined symbol referenced from my plugin for ray sensor? I've created a Gazebo Plugin that inherits fro

2018-02-24 03:26:20 -0500 received badge  Notable Question (source)
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2018-01-15 17:17:51 -0500 asked a question Why do the non-fixed joints appear unattached, and not connected into the ROS TF tree?

Why do the non-fixed joints appear unattached, and not connected into the ROS TF tree? I've generated a URDF model of a

2017-03-07 22:28:33 -0500 received badge  Editor (source)
2017-03-07 22:10:23 -0500 answered a question Very slooooow simulation

I've been commenting out portions of your world file to see if anything blatantly improves the simulation.

From what I've seen this evening in doing so is that when the "ray sensor" is enabled, the simulation gets hung at the first update; that is, at 20 Hz, time = 0.05 sec. I wonder if all the tags for that ray sensor (perhaps in conjunction with the other sensors) are set appropriately, see http://sdformat.org/spec?ver=1.6&elem... for reference.

Also removing the plugin seems to improve speed.

Perhaps creating a custom plugin that triggers each sensor simultaneously and moves them appropriately is the correct thing to do here, rather than relying on the tags from the world file to synchronize things with a separate plugin to control motion. I don't know if the following is possible, but if you could only worry about going to certain positions and taking snapshots without worrying about the motion and physics that may improve things (i.e. removing references to time in the Gazebo simulation).

Some tutorials for plugins are found at: http://gazebosim.org/tutorials?cat=wr...

Specifically, maybe something like the plugin described here would work with just adding a ray sensor: http://gazebosim.org/tutorials?tut=sy...

Also, to do a GPU Ray to my knowledge, you'll need a custom plugin for that sensor, such as http://gazebosim.org/tutorials?tut=ro.... For reference, http://answers.gazebosim.org/question...

Also, try changing the Physics engine in your world file to the following.

<physics type="ode">
      <max_step_size>0.05</max_step_size>
      <real_time_factor>1</real_time_factor>
      <real_time_update_rate>1</real_time_update_rate>
      <ode>
        <solver>
          <type>quick</type>
          <iters>2</iters>
          <sor>1.4</sor>
        </solver>
        <constraints>
          <cfm>0</cfm>
          <erp>1</erp>
          <contact_max_correcting_vel>0</contact_max_correcting_vel>
          <contact_surface_layer>0</contact_surface_layer>
        </constraints>
      </ode>
    </physics>
2017-03-06 14:14:01 -0500 asked a question Translating heighmap creates offset between collision and visual

When using the <pos> tag inside the <heightmap> to get my heightmap aligned with my coordinate system of choice, it appears to be translating correctly when I open the client, but when I place an object on the heightmap, it is as if the collision frame did not translate.

This portion of the world file looks as follows. There appears to have been a similar issue that was resolved a few years ago (http://answers.gazebosim.org/question..., https://bitbucket.org/osrf/gazebo/com...), but I still seem to be exhibiting the problem.

Any ideas? I am on Gazebo 7.5, installed from binaries.

 <model name="heightmap">
      <static>true</static>
      <link name="height">
        <collision name="collision">
          <geometry>
            <heightmap>
              <uri>file://media/heightmaps/terrain.png</uri>
              <size> 540 540 60 </size>
              <pos> -55 -72 0 </pos>
            </heightmap>
          </geometry>
          <surface>
            <friction>
              <ode>
                <mu>100000</mu>
                <mu2>500000</mu2>
              </ode>
            </friction>
            <bounce/>
            <contact>
              <ode/>
            </contact>
          </surface>
          <max_contacts>10</max_contacts>
        </collision>
        <visual name="visual_abcedf">
          <geometry>
            <heightmap>
              <use_terrain_paging>false</use_terrain_paging>
              <texture>
                <diffuse>file://media/heightmaps/terrain_tex.png</diffuse>
                <normal>file://media/materials/textures/flat_normal.png</normal>
                <size> 540 </size>
              </texture>
              <uri>file://media/heightmaps/terrain.png</uri>
              <size> 540 540 60 </size>
              <pos> -55 -72 0 </pos>
            </heightmap>
          </geometry>
        </visual>
      </link>
    </model>
2016-10-02 06:22:16 -0500 received badge  Famous Question (source)
2016-08-16 18:29:18 -0500 commented question Heightmaps aren't loading in Gazebo7

I am running Ubuntu 16.04. Problem first appeared on 14.04. I upgraded to 16.04 and reinstalled Gazebo7 using the curl command on the tutorial. Running with the --verbose command gives the error [Err] [Visual.cc:2739] No mesh specified This is concerning to me since the default Apollo Landing site model gives this error. Hopefully I didn't mess up a gazebo resource path somewhere.

2016-08-16 18:25:52 -0500 commented question Heightmaps aren't loading in Gazebo7

I am running Ubuntu 16.04 currently. The problem was first noted on Ubuntu 14.04 a few weeks ago. I upgraded to Ubuntu 16.04 and reinstalled Gazebo7 via the curl command on the installation page. The --verbose error when I click on those models to import include: [Err] [Visual.cc:2739] No mesh specified I'm a little concerned I changed around a gazebo resource path in that case since the default Apollo Landing site model gives this error in addition to my custom models.

2016-08-16 18:15:35 -0500 received badge  Notable Question (source)
2016-08-16 18:05:46 -0500 commented question Heightmaps aren't loading in Gazebo7

Both cause failures on my machine. Running from the command line with a .world file containing a heightmap attribute or inserting a model from the GUI's "insert" tab.

2016-08-16 18:04:04 -0500 received badge  Popular Question (source)
2016-08-12 11:20:10 -0500 asked a question Heightmaps aren't loading in Gazebo7

I'm running Gazebo7 and can't seem to get any model files (or world files) with <heightmap> to load. It will sometimes cause Gazebo to crash unexpectedly. Are heightmaps still supported with Gazebo7? If so, what am I missing? The default heightmap.world and the apollo landing site and my custom heightmap model are all not loading. Other custom models have not problem loading. Do I need to use DEMs instead of heightmaps?