8

600 Chapter 12: Animation
is intended to make the biped’s motion look as
natural as possible.
In the Mixer, you can control the degree of
automatic balance compensation using the balance
track. One balance tr ack is automatically created
for each biped as it is added to the Mixer.
Balance track
Tip: If the balance track for a biped is not
displayed, click Preferences on the Motion Mixer
toolbar, and turn on B alance Curves on the
Mixer
Preferences dialog (page 2–628)
.
The ba lance track has a weight curve for adjusting
thedegreeofautomaticbalancecompensation
between upper and lower body t rackgroups.
By default, the weight value of 1.0 across the
balancetrackprovidesthemaximumdegreeof
compensation. You can reduce the weight curve at
various points to lessen the degree of automatic
balancing performed by the Mixer.
Note: Each biped can have only one balance track,
and the balance track cannot be deleted.
For fine adjustments to balance compensation,
you can also change the parameters on the
Balance
Parameters dialog
,availablefromtheMixmenu.
Note: Balance Curves and related p ar ameters
are not available for non-biped mixes.
Pr ocedur es
To adjust balance using the balance track:
1.
AddabipedtotheMixer,andcreateatleasttwo
trackgroups for the biped. See
Filtering Mixer
Tr acks (page 2–589)
.
2. Filter one trackgroup to use motion only from
the spine, arms and head. See
Filtering Mixer
Tracks (page 2–589)
.Thistrackgroupwillhold
the upper bo dy motion.
3. Filter a different trackgroup to apply only to the
legs, pelvis and COM tracks. This tr ackg roup
will hold the lower body motion.
4. Add a clip with a great deal of upper body
motion to the upper body track. See
Importing
Clips to the Mixer (page 2–585)
.
5. Add a clip with very different lower body
motion to the lower body tr ack.
6. ClicktheBalanceWeightModebuttonat
thefarrightofthebalancetrack.
Theweightcurvebecomesvisibleatthetopof
the balance t rack.
Tip: If you can’t see the weight curve, click
Preferences to display the Mixer Preferences
dialog, and tu rn on Weight Curves.
7. Add nodes to the weight curve, and adjust the
nodes. F or information on how to add nodes
andeditweightcurves,see
Adjusting Track
Weight (page 2–596)
.
When the weight is set to 0.0, the Mixer wi ll
notadjustthespineandpelvismotionto
compensate for differences in the upper and