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Fixed in 2020.1.X
Fixed in 2019.2.X, 2019.3.X
Votes
0
Found in
2019.2.7f2
2019.2.8f1
2019.3.0a1
2020.1.0a1
Issue ID
1189951
Regression
Yes
GameObject with SpringJoint2D component isn't affected by RigidBody2D Mass when Freeze Position X is checked
How to reproduce:
1. Open the attached project ("case_1189951-Project.zip")
2. Open the SampleScene in the Scenes folder
3. Enter the Play Mode
Expected result: The platform sinks by colliding with RigidBody2D which has Mass.
Actual result: The platform doesn't move.
Reproduced in: 2019.2.7f2, 2019.2.9f1, 2019.3.0b6, 2020.1.0a8
Not reproduced in: 2017.4.33f1, 2018.4.11f1, 2019.2.7f1
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Resolution Note (fix version 2020.1):
This issue has nothing whatsoever to do with the SpringJoint2D or any joint related functionality. It's an issue caused by the XY constraints where it incorrectly calculates the scaled contact mass. In short this means that in the case project the contact causes the wrong forces to be calculated.
Fixed in: 2020.1.0a11, 2019.3.0b9, 2019.2.11f1