hollow cynlinder geom

[shivanimall]

Hello,

Is there an example to create hollow cylinder geom? Thank you!

[yuvaltassa]

I can think of 3 questions that you might be asking with 3 corresponding answers:

1. If you are asking about a hollow collision cylinder, no. In order to make concave collision geometries you need to form union of convex objects. This is fairly easy to do procedurally, e.g. by using our mjcf package. Let us know if you need help with this.
2. If you are asking about a visual cylinder, (i.e. simply not rendering the two end-caps), we could potentially add such a visual geom.
3. If you mean making a cylinder such that the computed inertia is concentrated on the geom’s shell, we are planning to add this option.

[shivanimall]

Many thanks @yuvaltassa for the detailed response, this is helpful! referring to (1) one. found an example for this: https://github.com/ARISE-Initiative/robosuite/blob/threading/robosuite/models/objects/composite/hollow_cylinder.py

[Krishnendu1984]

I want to create a prismatic joint with one cylinder going inside hollow cylinder how to do that .
Can anyone tell me

[Troldmand43]

I'm also looking for an answer to this question

[yuvaltassa]

The question is answered, but perhaps looking at the mug model would help.