2009

assigned. If a follow object has been assigned, then the rotation of the follow
object affects the IK solution.
NOTE This check box has no effect on the HD IK Solver Rotation end effectors,
which are always bound to their assigned joints.
R Establishes a relative position offset or rotation offset between follow object
and end effector.
This button has no effect on the HD IK Solver Position end effectors. They are
created on top of the joint to which they're assigned, and are automatically
absolute.
If you move the joint away from the end effector, and want to reset the end
effector to an absolute position, you can delete and then recreate the end
effector.
Axis X/Y/Z If one of the axes is turned off, the specified axis is no longer
influenced by the follow object or the HD IK Solver Position end effector.
For example, if you turn off the X axis in the Position group, movement of
the follow object (or end effector) along the X axis has no effect on the IK
solution, but movement along the Y or Z axis has.
NOTE These do not constrain the movement of the follow object or end effector.
Weight Sets the influence of the follow object (or end effector) on its assigned
object, and on the rest of the chain. A setting of 0 turns off the binding. Using
this value you can set the relative influence of multiple follow objects or end
effectors and their priority in solving the IK solution. The higher the relative
Weight value, the higher the priority.
The Weight settings are relative; there's no point in using them if there's only
one follow object or end effector in your IK hierarchy.
However, if you have a single HD IK chain with both Position and Rotation
end effectors on a single joint, you can give them different weights to give
priority to either the position or rotation solution.
You can adjust the Weight for multiple joints. Select two or more objects in
the hierarchy, and the Weight value represents the commonality of the
selection set.
NOTE Differences in the Weight values only have an effect when there is no
solution that satisfies two or more opposing end effectors in the chain. In this case,
the end effector with the greatest weight "wins."
3490 | Chapter 15 Animation