8

478 Chapter 12: Animation
2.
Set sliding or rotational joint parameters.
3. Click Copy in either the Sliding Joints
or Rotational J oin ts group on the Object
Parameters rollout.
4. Select a different object in the inverse kinematic
chain.
5. Select an axis to mirror in the Mirror Paste
group.
6. Click paste in either the Sliding Joints
or Rotational J oin ts group on the Object
Parameters rollout.
BothSlidingJointsandRotationalJoints
maintain separate clipboards. The copied joint
parameters are saved in the clipboard until you
replace them with new copied parameters.
Inter face
Sliding Joints group
Use these buttons to copy sliding joint parameters
from one object to another. These buttons are not
available for Path joints.
Rotational Joints group
Use these buttons for copying rotational joint
parameters from one object to another.
Mirror Paste group
UsetomirrortheIKjointsettingsabouttheX,Y,
or Z axis during a Paste operation.
Sliding and R otational Joints
R ollou ts ( HD S olv er)
Make a selection. > Hierarchy panel > IK > Sliding and
Rotational Joints rollouts
In inverse kinematics, joints operate by allowing
motion on one or more axes and restricting
motion on the remaining axes. You set whether
an object can move (slide) on or rotate about a
given axis with the Active check box in the joint
rollouts. Joints have a maximum of six possible
axes: three for position and three for rotation. You
constrain the motion of a joint by setting which
axes are active.
The setting of IK joint axes overrides any Inherit
and Lock settings in
Link Info (p age 2–481) .
Procedures
To activate or deactivate an axis:
1.
Select an object.
2. On the Hierarchy panel, click I K.
3. Expa nd the rollout for a joint type.
4. Tu r n on Ac t ive for any av ailabl e a x is.
• Whenon,theaxisisactiveandtheobject
canmoveorrotateaboutthataxis.
• Whenoff,theaxisisinactiveandtheobject
cannot move or rotate about that axis.
To limit a joint:
1.
Select an object.
2. Click IK in the Hierarchy panel.
3. Turn on Limited for any active axis. If an axis is
inactive the limits setting s are ignored.
• Whenon,theaxisislimitedandtheobject
canmoveorrotatewithintherangesetby
the From and To fields.
• Whenoff,theaxisisnotlimitedandthe
object moves or rotates freely about that