2009

Blending Motions in the Mixer
The Motion Mixer provides these types of motion blending.
■ You can blend motion from one clip to another with a
transition on page
8157. Transitions in the Mixer are similar to those used in the
motion flow
system
on page 4508. The optimization feature can automatically find the
best timing for a transition between two clips. When you make a transition
between foot-based clips (clips where IK constraints keep the feet planted
at certain times), you can cause the transition to focus on one foot or the
other. See
Working with Transitions on page 3724.
■ In biped animation, if a transition between foot-based clips causes the foot
to slide or pop slightly during the transition, you can fix this problem with
a mixdown on page 8045 (flattening all tracks into one track). See Exporting
Animation to the Biped
on page 3741.
■ You can change the weight on page 3730 of clips or tracks so they affect the
animation more at some times than others. See
Adjusting Track Weight
on page 3730.
■ You can use only the part of a clip's motion that affects specified body
parts. See
Filtering Mixer Tracks on page 3715.
■ When motions applied to a biped's upper body vary greatly from motions
on its lower body, the Mixer automatically compensates for discrepancies
in balance. See Adjusting Biped Balance in the Mixer on page 3737.
NOTE Balance parameters are available only when mixing biped objects.
Transitions Between Foot-Based Clips
The Motion Mixer excels in its ability to maintain smoothness of motion over
transitions between foot-based clips. Foot-based clips use IK constraints to
keep one or both feet locked down over the course of the motion.
For bipeds, the Mixer provides tools for maintaining foot positions during
transitions:
■ Computing the influence of balance from the upper to the lower body.
Without this, layered motion tracks will appear to be artificially combined
since out since the resulting motion will be plagued by the isolation of
dynamics and improper balance.
Using the Motion Mixer | 3701