The collision settings for robots imported by the URDF importer are strange

Isaac Sim Version

4.2.0
4.1.0
4.0.0

Operating System

Ubuntu 22.04

GPU Information

  • Model: GeForce RTX 3090
  • Driver Version: 555.42.06

Topic Description

There are too few parameters in the collision settings for robots imported by the URDF importer.

Detailed Description

Some of the properties of the collision immediately after import are shown below.

The parameters for changing the collider’s Approximation setting to Triangle Mesh and then changing it back are shown below.

Clearly, there are more parameters that can be set.
The default collider setting is sometimes too rough and I would like to be able to change the setting immediately.

Steps to Reproduce

  1. Select collision for any link of the imported robot in the URDF Importer (use “Convex Decomposition”).
  2. Check that Phisics->Collider->Approximation in the properties is set to “Convex Decomposition”.
  3. Choose “Triangle Mesh”.
  4. Choose “Convex Decomposition”.
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Did you observe any different behavior after changing the collider’s Approximation setting from ‘Convex Decomposition’ to ‘Triangle Mesh’ and back again?

Parameters such as “Hull Vertex Limit” and “Max Convex Hulls” were appeared.
Perhaps this parameter should be displayed from the beginning in a normal “Convex Decomposition”.

Could you provide the detailed steps and the necessary files to reproduce this issue?

Here is an example of how the problem can be easily understood, even though it is a case of “Convex Hull”.
The way to do this is to check the parameters of the robot model generated by the official “Import Franka”.

@VickNV Could you reproduce the problem? If not, I’ll have to look for another case.

I apologize for the delay in responding to your post. I have successfully reproduced the problem you described using the steps you provided.

I’ll update this thread as soon as we have more information

I solved the issue with this post.

2 Likes

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