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Won't Fix

Votes

3

Found in

2018.4

2020.1.1f1

2020.2

Issue ID

1268971

Regression

No

The GameObject's rotation suffers from Gimbal Lock when Rotation Constraint is set on 2 axes

Animation

-

How to reproduce:
1. Open the user's attached "RotationConstraintBug.zip" project
2. Open the "SampleScene" Scene
3. Enter Play Mode
4. Press and hold the UP arrow key on the keyboard until both GameObjects stop rotating
5. Observe the GameObject on the right in the Game view while holding the Up arrow key

Expected result: The GameObject on the right doesn't flip (Doesn't suffer from Gimbal Lock)
Actual result: The GameObject on the right flips (Suffers from Gimbal Lock)

Reproducible with: 2018.4.27f1, 2019.4.10f1, 2020.1.6f1, 2020.2.0b3

  1. Resolution Note:

    This is due to current limitations in the rotation constraint.

    Workaround is to use the Animation Rigging package.

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Comments (2)

  1. LabOSM

    Nov 02, 2020 08:49

    "Workaround is to use the Animation Rigging package" yeah, but the Animation Rigging package suffers from the same problem.

  2. LabOSM

    Sep 15, 2020 05:51

    The category of the bug should be “Animation”, since the rotation constraint is an animation component, I’m not referring to the rigidbody’s rotation constraint.

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