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Votes

0

Found in

2022.3.8f1

2023.1.10f1

2023.2.0b6

2023.3.0a2

Issue ID

UUM-47084

Regression

Yes

Rigidbodies are not rotating when the Interpolation is turned on

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How to reproduce:
1. Open the attached project “RotationBug”
2. Open the “SampleScene” scene
3. Enter the Play Mode
4. Select the “GameObject” in the Hierarchy and under the “Rotator (Script)” Component click the three dots menu
5. Click “Rotate 90deg clockwise”
6. Observe the rotation

Expected result: The GameObject rotates
Actual result: The GameObject is not rotating but in the Scene View the axes are rotating

Reproducible with: 2022.1.0a6, 2022.3.8f1, 2023.1.10f1, 2023.2.0b6, 2023.3.0a2
Not reproducible with: 2021.3.29f1, 2022.1.0a5

Reproducible on: Windows 11 Pro

  1. Resolution Note:

    I regret to inform that this worked before 2022.1 because of undefined behaviour when setting transform both from script and from physics (as part of interpolation) at the same time. Between 2017 and 2022, when a an interpolated rigidbody was present in a scene, we had to sync all queued transform changes to the physics engine every Update, not FixedUpdate actually. That was because of a limitation in some core underlying technology that was removed in the later years. So for that reason, we changed that behaviour to gain additional performance for the typical use cases. Please read more about this here: https://blog.unity.com/engine-platform/expanding-the-robotics-toolbox-physics-changes-in-unity-20221, section "Interpolation and extrapolation". Anthony.

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