8

590 Chapter 12: Animation
The Trackgroup Filter dialog for non-biped objects.
When a t rackgroup is created, it is given one Layer
track by default. However, you can add more
tracks to each trackgroup, mak ing it possible
to mix motions for each set of body parts. For
example, you could create a trackgroup for the
arms, and have two tracks within this trackgroup.
Then you could put two completely different sets
of motions on each track, and use weighting to use
one track or the other at different times during the
motion. See
Adjusting Tr ack Weight (page 2–596) .
Trackgroups for Spine, Legs and Arms. The Arms trackgroup
has two tracks.
Note: Create only one trackgroup for each filtered
set of body parts. For example, don’t use two
trackgroups that both filter the spine. If you do
so, the trackgroup highest in the Motion Mixer
is used, and the other t rackgroup is ignored.
Instead, use multiple tr acks within the trackgroup
to achieve the animation you want.
Procedures
To a dd a new tr a ckgr oup for t he biped:
1.
Highlight the name of an existing trackgroup.
2. Right-click the trackg roup name and choose
Add Trackgroup A bove or Add Trackgroup
Below.
A new trackgroup and Layer track are added
aboveorbelowtheexistingtrackgroups.You
can add more tr acks to the trackgroup by
right-clicking the existing track and choosing
one of the options from the pop-up menu.