Is there a way to turn Physics off for an object after it hits the ground?

Omniverse Apps USD Composer
1

Today I learned how to make a plane with holes in Blender and export it to Omniverse.

I then created 10,500 spheres to fall through the holes. My FPS drops to .27, that is roughly 1 frame every 4 seconds.

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One way I can think of to improve performance if it is possible, is if there was an option to turn off physics when object stops moving or if it goes past a certain threshold of X, Y, or Z.

Instancing doesn’t seem to help.

Any other tips for how to improve performance on large amounts of objects are welcome.

Thanks

2

Hi,
did you try to use flatcache extension? (Enable omni.physx.flatcache extension).

Another tip on a PhysicsScene in advanced settings set Asynchronous simulation mode.

You can add a plane at some position and increase the sleeping threshold for the bodies so that once they hit the plane they go very soon to sleep.

3

How do you set the sleeping threshold?

No I didn’t try to use the flat cache, I don’t think. I will look.

Thanks

4

Flat Cache and the Asynchronous mode made a huge difference.

With 3,000 spheres I still get almost 70 FPS. Thank you very much.

5

Cool, on a rigid body you can set the sleep threshold parameter.

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