Problems working with .dae files
Hello everyone, I'm struggling with a urdf model to visualize in rviz, this is the file I've written so far:
<?xml version="1.0"?>
<robot name="bot2489">
<material name="black">
<color rgba = "0 0 0 1"/>
</material>
<link name="base_link">
<visual>
<origin rpy="0.0 0 0" xyz="0 0 0"/>
<material name="black"/>
<geometry>
<mesh filename="package://bot2489_description/meshes/bot2489_body.dae"/>
</geometry>
</visual>
<collision>
<origin rpy="0.0 0 0" xyz="0 0 0"/>
<geometry>
<mesh filename="package://bot2489_description/meshes/bot2489_body.dae"/>
</geometry>
</collision>
</link>
</robot>
The problem is that when I launch it in rviz, using the urdf_tutorial display.launch file, nothing appears.
In the "Global Status" section of the window there's a warning :
No tf data. Actual error: Fixed Frame [base_link] does not exist
It is weird, because the .dae file should be fine (is made with Rhino v5 and saved as .dae), and on the terminal, while loading the file, I get no errors. Can you please help me to understand what I'm doing wrong?
Can you update your question text with the exact command that you use to start everything (ie: the one with
display.launch) and include the complete output you see on the console after starting it?If you posted your complete URDF, I think the issue is that you don't have any
<joint>elements. Without a joint connecting two links, there is nothing for therobot_state_publisherto send on/tf. Try adding a link with only thenameset, and a fixed joint connecting the two links@jarvisschultz, I think it t could be also that, but I got the same error even after adding the joints. Ended up that the problem were the .dae files, that I created with rhino.I just had to export them to Blender as .3ds files and there export them as .dae files and everything worked
It would perhaps be good to see what the incompatibility is. Could you perhaps submit an issue to ros-visualization/rviz/issues with a minimal URDF and an example Collada file that shows this problem?