PhysX Error: attachshape: Non-SDF triangle mesh

Omniverse Apps USD Composer (Create)
1

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All I did was try and rotate a cylinder with Rigid Body and Collider Presets.

I was curious if it would roll in place, or would it move. Neither happened.

Thanks

2

Can you please provide more details to the repro?
Was this while simulation was running? Can you please attach a simple scene to repro the issue or describe more closely what you tried to do?

3

I didn’t save the project when I received the error. I tried to recreate the issue just now and couldn’t.

I tried to add Rigid Body and Colliders Presets to an object that is on a ground plane. Today it won’t even spin if I have Rigid Body selected, so maybe I did something in an order it didn’t like.

Not to go off topic on a post, but maybe you can tell me why this physics is not what I expect.

I created a cylinder with Colliders Presets, set an animation to rotate the cylinders very slowly. When I set a box with Rigid Body and Colliders Presets applied, I would expect the box to roll along the cylinders. The box falls, the cylinders spin yet the box remains stationary.

Any ideas how to make this work like I think it would in the real world?

I attached this project.

Thanks

Rollers.usd (15.7 KB)

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4

If you want physics to behave better with animated objects you should move with kinematic rigid bodies.

Select all the cylinders:

  1. add → physics → rigid body
  2. enable kinematics in the properties window

The box should start to move as expected. Additionally its possible to create conveyor belt behaviour using surface velocity (velocity on a kinematic body), see conveyor belt physics example.

5

Thank you. I will try that.

6

The Kinematics worked.

Thanks again.