2009
The prop will now follow the movement of the left hand in the frames
that follow.
NOTE By default, the prop's rotation remains in Body space. Depending on
your animation, you might also want to set keys so the Rotation space is Right
Hand before the switch, and Left Hand after the switch.
To collapse the transforms of a prop:
1 Animate the prop however you like. You can add list controllers to the
prop as you can to any other part of the biped.
2 When the animation is correct, select the prop.
3 In the Motion panel hierarchy list, select the prop transform list you want
to collapse, and then right-click.
A quad menu appears.
4 Choose Properties from the quad menu.
5 In the dialog that is displayed, make the appropriate choices, and then
click Collapse.
After a short delay, the track bar displays the keys that have been added.
TIP If you see a different Properties dialog that doesn't offer you the Collapse
button, you are too low in the hierarchy. Select the next level up in the
hierarchy and try again.
Freeform and IK
Using IK Keyframe Parameters
Biped's inverse kinematics solution has three parameters set at each key of the
arm and leg keyframe tracks. As the limb moves through each key:
■ IK Blend sets the motion interpolation to be a blend of forward and inverse
kinematics. This allows you to blend swinging motions with hand-or-foot
directed motions. Rotating an arm to move a hand is an example of forward
kinematics. Using the position of the hand to move the arm is an example
Freeform Animation | 4259