Maya IK FK Flipping

Fix IK FK Flipping

Lets see how to fix IK fK joint chain flipping while switching at the default position.

There are three joint chain viz IK, FK and Skin. Skin joint chain is constrained and switched to go along with Ik or Fk joint chain.

Cause:-

Flipping happen when the joint chain are not in a plane. It can happen with hind limb setup of a quadruped, wings of birds, etc, The flip is apparent when the Polevector constrain is done to the Ik handle. So, it is evident that the flip is more because of the position of the Polevector control.

Fix:-

Draw linear curve from 1->2->3 using EP curve tool.

Go to component mode. Select the vertex at 2.

Set the move tool setting to "Normal" axis.

Drag it away to the desired location.

Snap the Polevector control to the vertex .

Now apply polevector constraint to the IK handle.

Now the Skin joint chain will switch without flipping at the default position.

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