9

Keyframing Tools Rollout 963
WhentheSeparateFKTracksoptionsareonfortheArms
and Fingers, only these tracks receive keys.
When the S eparate FK Tracks options are off, all
limb tracks receive keys.
Tip: Separate Tracks are designed to be used with
forward-kinematic (FK) rotations. Using the
Mo v e tool to change the position of a biped limb
w ith Separate Tracks requires that you tur n on Set
Parents Mode. If Set Parents Mode is off, then
thelimbyoumoveisstoredrelativetoitsparent
objects, and the new parent p ositions are not
stored. The parent objects will snap back to their
originally stored location. Turning on Set Parents
Mode ensures that the position of the entire biped
limb is stored.
Note: Separate Tracks are intended to be used as a
preference. It is better to turn them on once for
the tracks you plan to edit by hand. Turning off
Separate Tracks that are currently on causes a key
to be stored for every biped object in the limb
for the frames where any biped keys previously
existed.
Procedure
Example: Use separate finger tracks to create a
cl enching f ist:
1.
Create a biped with five fingers that have three
joints apiece.
2. Turn on Set Parent s Mode.
3. Turn on Separate FK Tracks for Arms.
4. Selecttherighthandandsetafreekeyatframe
0.
5. Go to frame 30, move the hand up and
for ward, and t hen set a planted key.
6. Go to frame 40, set a free key (this will have IK
onbydefault),selectthepivotatthebaseofthe
hand (only hand pivots are present, not finger
pivots), and reset the key.
7. The hand should now move up and then rotate
at its base.
8. Select a finger. So far, it has no keys.
9. Animate each finger individually, so they curl
up one at a time.