9

Position/Orientation/Bind to Follow Object (HD Solver) 493
Inter face
Position group
Bind Position—Binds the selected object in the
IK chain to the world (attempts to maintain its
location), or to a follow object, if one has been
assigned. If a follow object has b een assigned, then
the translation of the follow object affects the IK
solution.
Note: This check box has no effect on the HD IK
Solver Position end effectors, which are always
bound to their assigned joints.
Orientation group
B ind Or ientat ion—Binds the selected object in the
hierarchy to the world (attempts to maintain its
orientation), or to a follow object, if one has been
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 S olver
Posit ion end effectors. T hey 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 Solv er Position end eff ector.
For example, if you turn off the X axis in the
P osition group, mov ement of the follow object (or
endeffector)alongtheXaxishasnoeffectonthe
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.
Weigh t—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