Character Rigging - Game Character Development with Maya - page 724

FIGURE 12.19 Both control arms, with IK and icons applied
Now follow the same procedure for adding IK to Grae's arms:
1. Duplicate the main arms to create the control arms, renaming the new joints ac-
cordingly.
2. Orient-constrain the main arm joints to the control arm so that they will inherit the
control arm's movement.
3. Make the display handles visible on the control arm, and edit their positions.
4. Point-constrain the control shoulder to the main skeleton's shoulder so that the
control arm always lies in the correct position.
5. Add the IK handle between the control shoulder and the control wrist.
6. Add two icons, one to control the IK and another to control the pole vector. Posi-
tion the IK control over the wrist and the pole-vector control over the elbow.
7. Set up the FK/IK switch on the wrist icon; then parent the IK handle to the icon.
Set up the pole vector constraint between the IK handle and the elbow icon.