Character Rigging - Game Character Development with Maya - page 782

4. We are going to use an IK Single Chain solver that will enable us to position the
head and lock it, so that the character can stay focused on one thing while her body
does another. Go to Skeleton > IK Handle Tool. Making sure you have ikSCsolver
selected in the options, and create a handle from the main Head joint to the
Head_Tip joint ( Figure 12.66 , top). Call this handle Head_Direction.
FIGURE 12.66 Create an ikSCSolver for the head and parent it to the head icon.