9

458 Chapter 12: Animation
information, see White Paper: Swivel Angle of the
HI IK Solver (page 2–449).
IK Goal—Defines the Swivel Angle parent space
relative to the IK Goal.
Start Joint—Defines the Swivel Ang le Parent Space
relative to the Start Joint.
Thresholds group
Use to define the tolerances the system uses for its
calculations.
Positi on—Sets a limit in units of how far the goal
can be mov ed from the end effector. K eep these
numbers low.
Rotation—Sets a limit in degrees of how far the
goal can be rotated away from the end effector
rotation. Keep t hese numbers low for best results.
Note that adjusting the Rotation threshold on the
HI Solver and IK Limb Solver has no effect. It is
up to the plug-in solver’s discretion as to whether
or not they will support a rotation component in
the IK solut ion.
Solutions group
Use to control the precision of the animation.
Increase the iterations when the IK solution
produces an animation that appears rough or
jittered.
Iterations—The number of attempts an IK s olution
w i ll make to find the best match between the
goal and the end effector positions. Increase this
number if you are seeing jumpy animation.
IK Display Options Rollout (HI
Solver)
Create a bone chain > Add an HI Solver. > Motion panel
Here are the controls to turn on and off a variety
of gizmos in the viewpor t. The Goal and End
effectors,thevectorhandleoftheswivelangle
manipulator, and t he IK s olver display itself, are
all located in this rollout.
Procedure
ToseemultipleIKsolversinasinglechain:
1.
In a chain with multiple IK solvers, select a goal
in the viewport.
2. IntheIKDisplayOptionsrollout,turnonIK
Solver Display Enabled.
3. Select a second goal and repeat the process.
Each goal’s display remains on whether it is
selected or not.
Interfa ce
End Effec tor Display group
Controls the appearance of the end effectors in the
IK chain. Off by default.
Enabled—Turns the end effectors display on or off.
Size—Controlsthesizeoftheendeffectorgizmo
in the v iewport.