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Votes

0

Found in

2019.4

2020.3

2020.3.18f1

2021.2

2022.1

Issue ID

1379464

Regression

No

worldCenterOfMass and position of Rigidbody values are changing when X, Y or Z axes values are not 0

Physics

-

How to reproduce:
1. Open the attached "1379464.zip" project
2. Open the "SampleScene" Scene
3. Enter the Play mode
4. Select the "Cube" GameObject
5. In the Inspector Window -> "TestScript" Component change the "CoM" X, Y, or Z axes values
6. Observe the Console Window

Expected result: rb.worldCenterOfMass and rb.position values are constant
Actual result: rb.worldCenterOfMass and rb.position values are changing

Reproducible with: 2019.4.32f1, 2020.3.23f1, 2021.2.4f1, 2022.1.0a16

Notes:
- Reproducible when at least 2 (X, Y, or Z) values are not 0

  1. Response avatar

    Resolution Note:

    Updating center of mass in FixedUpdate is highly discouraged. PhysX is storing everything relative to the center of mass and every time you modify it, PhysX has to recalculate coordinates and that's when drift appears.

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