Maya/Rigging: IK to FK snapping, part 1 by zeth willie. This is a three parter. . . a trilogy if you will (I love it when people say, "if you will"), about the basics of setting up an IK/FK snapping script that will correctly position your IK control and pole vector based on the rotations of your FK arm. A little bit of math, some elbow grease and a winning attitude are you need! And some python scripting. And some secret nodes. And a bunch of other stuff too. . .