Keywords: Maya, Rig Control Curve, Control Rig, IK, FK, Leg

Maya Rigging series of articles:

IK Workflow for Leg

Take the left leg as an example:

1, Duplicate left leg joints.

Then rename joint name in batch.

2, Create Controls for IK handle.

Snap the Control to the target joint.
Then adjust the translate and rotate of Control.

3, Create a new Control for Pole Vector.

Adjust the hierarchy to Controls.

4, Create IK Handle for foot joint and ball joint.

5, Create constraint to foot control and foot IK handle.

6, Create constraint to ball control and ball IK handle.

7, Create constraint to ball control and foot IK handle.

Now you can drive the IK using controls.

8, Create pole vector to foot IK handle.

Now you will see the Pole Vector attributes have been flagged with cyan brick.
Finally you can drive the IK of knee in horizontal direction.

References

Character Rigging in Maya! Episode 6 - Creating the IK Hand Controls
https://www.youtube.com/watch?v=2vJ8pSPcDzM
Character Rigging in Maya! Episode 7 - Creating the IK Leg Controls
https://www.youtube.com/watch?v=qbQ8tq5a2JA

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