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Votes

0

Found in

2019.3.0a4

2019.4

2019.4.19f1

2020.2

2021.1

2021.2

Issue ID

1313367

Regression

Yes

CharacterController isGrounded property affected when changing the Editor layout so that Scene/Game/Animator windows are visible

Physics

-

How to reproduce:
1. Open the attached project (case-1313367_CharacterController)
2. Click Play
3. Observe the character jumping and the values printed to the console
4. Change the layout in such a way that both the Scene window and the Game window are visible
5. Observe the character no longer jumping and the values printed to the console

Expected result: The behaviour of the isGrounded property does not change
Actual result: The behaviour of the isGrounded property changes

Reproducible with: 2019.3.0a4, 2019.4.19f1, 2020.2.5f1, 2021.1.0b7, 2021.2.0a4
Not reproducible with: 2018.4.30f1, 2019.3.0a3

Notes:
1. In Unity 2020.2.5f1, 2021.1.0b7, 2021.2.0a4 all 3 windows (Scene, Game, Animator) have to be visible for the change in behaviour to occur

  1. Response avatar

    Resolution Note:

    Based on the project setup calling CharacterController.Move every frame in the direction of the box forces the object to overlap with the box collider. This results in the Character controller being pushed out of the box collider on the next Physics Update and causing weird behaviour where sometimes IsGrounded would return True and sometimes it would return False. This behaviour is circumvented if CharacterController.Move is called from FixedUpdate (IsGrounded always returns true, no matter what window you are looking from)

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