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Is threlte/rapier deterministic? about threlte HOT 2 OPEN

nicmr avatar nicmr commented on June 21, 2024
Is threlte/rapier deterministic?

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Comments (2)

grischaerbe avatar grischaerbe commented on June 21, 2024 1

Hey @nicmr, the way @threlte/rapier is implemented is not yet deterministic. This is mostly due to the fact that the way the physics world is updated. Currently it uses the delta timestamp provided by useTask, which may vary depending on the device and slight variations due to the achieved frame rate.
We are however aware of that limitation and plan to implement a fixed-frame physics world update in the near future. It's everything but trivial if you want to get it right, but we did a lot of groundwork for this by adding the Threlte Task Scheduling System. I'll leave this open to track progress!

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nicmr avatar nicmr commented on June 21, 2024

Thank you for the insight!
Feel free to rename the issue to better reflect this being used to track progress if you'd like :)

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