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Third Party Issue
Votes
0
Found in
2021.3.42f1
2022.3.44f1
6000.0.17f1
Issue ID
UUM-78940
Regression
No
GameObject stops oscillating when Spring with Position Damper set to 0 is attached
Reproduction steps:
1. Open the attached project "ReproProj"
2. Open the “/Assets/Scenes/Spring Models.unity” Scene
3. Enter the Play Mode
4. Observe the “Unity Model” GameObject
Expected result: “Unity Model” keeps oscillating forever
Actual result: “Unity Model“ GameObject stops at rest
Reproducible with: 2021.3.42f1, 2022.3.44f1, 6000.0.17f1
Reproducible on:
Play Mode
Windows Standalone Player
VLNQA00325, Samsung Galaxy Note10 (SM-N970F), Android 12, CPU: Exynos 9 (9825), GPU: Mali-G76
VLNQA00318, Oneplus OnePlus 7 Pro (GM1913), Android 11, CPU: Snapdragon 855 SM8150, GPU: Adreno (TM) 640
VLNQA00231, Samsung Galaxy A5(2017) (SM-A520F), Android 8.0.0, CPU: Exynos 7 Octa 7880, GPU: Mali-T830
Testing environment: Windows 10 Enterprise 21H2
Not reproducible on: No other environment tested
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Resolution Note:
Heya!
This behavior is due to the way internal independence is handled inside PhysX, as such even springs without any damping will still have some observed dampening over time. We should note that the Temporal Gauss-Siedel(TGS) solver losses less energy in this manner compared to Projected Gauss-Siedel(PGS), but there will still be some loss either way.
Cheers,
AlexRvn