9

946 Chapter 14: character studio
(page 3–1025). Controlling the COM using
the Track Selection rollout tools is sometimes
quicker because selecting the center of mass in
your viewports can be difficult if your biped
resides inside a bigger rigged model. As long
as you select your biped by any limb, ac tivating
the COM tools from the Track Selection rollout
automatically selects the center of mass with the
proper Transform gizmo:
• Body Horizontal and Body Vertical enable the
Move gizmo.
• Body Rotation enables the Rota te gizmo.
When you key the COM’s position or orien tation
using Set Key (page 3–718) or Auto Key (page
3–717), the animation data is stored within the
respective biped transform tracks.
The biped Transform tracks contain the COM keyed data.
Pr ocedur es
To Edit the COM’s position and or ientation:
1.
Create a biped.
2. On the Motion panel, exp and the Tr ack
SelectionrolloutandturnonBodyHorizontal.
TheMoveTransformgizmoappearsatthe
COM’s location, highlighting the X and Y
axes because they are referring to the biped
Horizontal Transform track.
The Transform gizmo centered on the biped’s COM.
Tip: To avoid deselecting the C OM inadvertently,
you can use Lock Selection (page 2–555) to keep
your selection on the center of mass, ignoring
all other objects in your scene.
Tip: You c an scale the Transform gizmo using
the
- (hyphen) and = (equal sign) shortcut
keys. Scaling the gizmo makes it easier to use,
but does not affect the transform values.
3. SelecttheMovegizmo’sZaxis.
This turns off Body Horizontal and turns on
Body Vertical.
4. Turn on Body Rotation on the Track
Selection rollout.
TheMoveTransformgizmoisreplacedbythe
Rotate Transform gizmo. You can now change
the biped’s orientation.
To Lock a ll B i ped COM Tools:
This procedure follows the concept from the
previous procedure, and centers on selecting
multiple COM tracks at the same time, as well as
locking them.
1. OntheTrackSelectionrollout,turnon
Body Hor izontal.