Gazebo does not spawn mesh

asked 2022-05-30 19:12:55 -0500

pablo.arandarod
53 ●10 ●15 ●22

I was trying to spawn a simple differential drive robot with a mesh for the body, the wheels and the caster ball. The meshes are stores in a folder inside the package called meshes. The name of the package is toycar, so in order to include the meshes, I add the following lines to the definition of the wheel link;

<visual>
        <origin xyz="0.0 0.0 0.0" rpy="1.57 0.0 0.0"/>
        <geometry>
            <mesh filename="package://toycar/meshes/wheel.stl" scale="1.0 1.0 1.0" />
        </geometry>
</visual>

Even if there is no error appearing in the launch of the node, the mesh of the wheel does not appear. This is extended to the other links, but I only worked with this one for now to isolate the problem.

answered 2022-05-31 01:58:09 -0500

Joe28965

1124 ●3 ●73 ●28

package:// no longer works. Could you try ${find toycar}/meshes/wheel.stl. I believe that should work.

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Thanks, it is working now! In which part of the documentation is this found? In order to be able to check more things in the future

pablo.arandarod ( 2022-05-31 02:20:58 -0500 )edit

This is a very important point - I've had the same mesh problems before and this was the only way to overcome them. It should be mentioned somewhere in the ROS or Gazebo tutorials.

ljaniec ( 2022-05-31 02:24:16 -0500 )edit

I honestly don't know where in the documentation that's mentioned (if mentioned anywhere). It's one of those things that you pick up over the years I guess?

Could you accept my answer as correct, to mark the question as answered?

Joe28965 ( 2022-05-31 02:26:17 -0500 )edit

Sure! I thought I did already. But what is weird is that I just checked the ros tutorials and the gazebo tutorials and cannot find anywhere where they mention that.

pablo.arandarod ( 2022-05-31 02:33:21 -0500 )edit

Could you link to the tutorials where they mention meshes? I've had a quick search and wasn't able to even find a tutorial on meshes.

Joe28965 ( 2022-05-31 02:38:55 -0500 )edit

Here: http://wiki.ros.org/urdf/XML/link They mention the format I initially put.

pablo.arandarod ( 2022-05-31 05:32:41 -0500 )edit

Ah, yes, wiki.ros consists of ROS1 tutorials, which makes sense since package:// does work in ROS1. docs.ros.org will send you to the ROS2 documentation.

Joe28965 ( 2022-05-31 06:38:14 -0500 )edit

As you can see in this link, it is still unchanged in the tutorials. I might try to find it in the git repository and do some pull request.

pablo.arandarod ( 2022-06-01 09:24:57 -0500 )edit

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