Rotating the IK bone chain in certain angles can cause it to flip 180º

Package: 2D Animation

9.1.X

9.1.1

7.1.X

7.1.1

10.1.X

10.1.2

This is previously reported by a user in the 2d forums:

Steps to reproduce:

1. Install Animation Samples from 2D Animation package

2. Open up "2 Part Swap" scene under "4 Sprite Swap" directory in the samples

3. In the scene editor, drag the "arm_l_ solver_Target" IKTarget around the joint slowly

Actual results: At certain narrow angles, it can be observed that the entire IK Rig flips

Expected results: It should not flip at all angles

Reproducible with versions: 2D Animation 9.1.0

Not reproducible with versions:

Can’t test with versions:

Tested on (OS): MacOS ARM

Notes: