8

Exporting Animation to the Biped 601
lower body motion. Values between 0.0 and 1.0
will adjust the balance to some degree.
To fine-tune balance compensation on the pelvis
and spine:
ThevaluesontheBalanceParametersdialogcan
be used to make subtle adjustments to the biped’s
balance.
1. In the Motion Mixer, select the biped by
clicking its name at the upper left corner of its
trackgroups.
2. From the Motion Mixer menu, choose Mix >
Balance Parameters.
The Balance Parameters dialog appears.
3. To adjust the degree of horizontal balance
comp ensation on the pelvis, change t he Lateral
Ratio parameter. Lower values make more
forward/backward motion on the pelvis, while
higher values use more side-to-side motion to
compensate.
4. To adjust the deg ree to w hich spine rotation
from the lower body motion is propagated
ontheupperbody,changethePropagation
parameter. Higher values rotate the spine links
to better follow the COM and pelvis motion.
Bipedswithsameupperandlowerbodymotion.Biped
on left has Propagation set to 0.0, biped on right with
Propagation at 1.0.
Expor ting Animation to the B iped
Once you’ve worked with the Motion Mixer to
create an animated sequence for the biped, there
areseveralwaystoworkwiththefinishedmix.
If you want to work with the mix on the current
biped (rather than a another biped in the scene),
you have several options:
•
If you’re satisfied w ith the animation as
itis,youcanturnonMixerModeonthe
Biped
rollout (page 2–791)
to display the mix on the
biped, and simply render the scene.
• If transitions b etween different foot/leg
motionshavecreatedsmallpopsorjerksnear
the t r a nsition area, you wil l want to create a
mixdown (page 3–1067) for the biped and
check the mixdown before copying it to the
biped. A mixdown can correct many continuity
problems with feet and legs. You can correct
transitions and recompute the mixdown as
many times as you like. When the mixdown is
satisfactory, you can copy it to the biped.
If you want to use the motion with a different
biped, you can copy the mixdown to the current
biped, save the motion as a BIP file, and load the
new BIP file onto the other biped.
ThemixcanalsobesavedasaMIX(
.mix )file.A
MIX file (page 3–1067) can be loaded onto other
bipeds and edited as needed in the Motion Mixer.
Fix ing Foot-B as ed Tra nsi tions with a
Mixdown
When you create a transition between two motions
with planted feet (feet with IK constraints), the
motion might not match perfectly between clips.
When this occurs, a planted foot might slide or
pop, or a leg might stretch unnatura l ly during or
near the transition period.