8

HD Solver Motion Panel Rollouts 447
Manual—
With this option, the IK problem is not
solved until you click Update.
Update—With Manual on, click to solve the IK
solution.
Display Joints group
The options here affect the display of the joint
axes and limits. When a rotational or sliding
joint is active (Active is selected in the Sliding
or R otational Joints rollouts in Hierarchy > IK
panels), an orange "rod" appears representing the
active axis. When the joint is also limited, a pair
of small orange squares appears, representing the
From and To limits of the joint. If it’s a sliding
joint, the squares are positioned on the axis rod. If
it’s a rotational joint, the squares are at the ends of
an orange arc.
Always—Displays the axis rod and joint limits for
alljointsinthechainatalltimes.
When S elected—Displays the axis rod and joint
limits only on selected joints.
Tip: The joint icons can be difficult to see when the
bones are linked to mesh objects. When animating
a bone-based hierarchy, you can hide all of the
objects and display and animate only the bones,
which makes the joint icons more visible. This is
easily done by hiding geometry by category in the
Display branch.
End Effectors group
With the options in this group, you can add or
delete Position or Rotation end effectors for any
joint. Options affect only the currently selec ted
joint. An
end effector istheobjectthattheIK
chain follows to come to a solution. There are two
types of end effectors: Posit ion and Rotation. Both
aredisplayedasthreeintersectingbluelinesatthe
joint. When you select a joint that car ries either or
bothendeffectorsandperformatransformation
matchingthetypeofendeffector,onlytheend
effector itself is transformed. The objects in the
chain then use IK to follow and create the IK
solution.
When you transform a joint that do es not have
an end effector (or perform a type of transform
that doesn’t match the assigned end effector), you
transform the joint itself and alter its initial state.
Posit ion—Creates or deletes Posit ion end effectors.
If the node already has an end effec tor, only the
Delete button is available.
Cr e a te —Creates a Position end effector for the
selected node.
Delete—Removes the Position end effector from
the selected no de.
Rotation—Works like the Position buttons, except
Rotation end effectors are created rather than
P osition end effectors. When y ou want to solve for