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Fixed in 2018.3.X

Fixed in 2018.2.X



Found in



Issue ID




Quaternion.LookRotation breaks rotation physics when parented with a moving object



How to reproduce:
1. Open user-submitted project (SpringBug)
2. Enter Play Mode
3. Press the 'space' key to parent and unparent the 'SpringObject_Broken' with the 'Sphere' GameObject

Expected result: the spring remains aligned with the sphere after some toggling
Actual result: the end of the spring jitters around the sphere slightly after some toggling

Reproducible with: 2018.1.6f1, 2018.1.9f1, 2018.2.0b4, 2018.2.0f2, 2018.3.0a5
Not reproducible with: 2017.1.4p2, 2017.2.3p2, 2017.4.7f1, 2018.1.5f1, 2018.2.0b3

'SpringObject_Fixed' GameObject can be used for comparison to see how the physics should actually behave

Comments (3)

  1. AG_Dan

    Sep 20, 2018 00:46

    FYI according to the release notes this issue has been fixed in 2018.2.8f1 (see:

  2. viceca

    Aug 27, 2018 05:54

    this is still an issue on 2018.2.5f1!

  3. Marcos-Elias

    Aug 02, 2018 06:17

    Do you know when there will be a patch for this? This is very severe!

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