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By Design
Votes
2
Found in
2017.1.2p2
Issue ID
973481
Regression
No
Parenting object when Inverse Kinematic is used causes physical object shift in world space and breaks animation
To reproduce:
1) Open attached project and scene
2) Play it
Expected steps:
3) Click Start IK
4) Click Stop IK - notice the hand movement
5) Click Set baseball parent
6) Start and Stop IK - notice how ball moves together in relation to hand
7) Reset ball's hierarchy to go back to step 2
Actual steps:
7) Click Start IK
8) Click Set baseball parent
Notice that the ball and hand move back and that Starting/Stopping IK creates no animation at all
Reproduced in 2017.1.2p2, 2018.1.0a7
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Resolution Note:
You can't use a child object of the hand as the target position for the IK, because it causes a feedback loop. The hand moves, moving the target, moving the hand, moving the target.