9

Track Selec tion Rollout 947
2.
Turn on Lock COM Keying.
Lock COM Keying allows you to activate al l
center of mass tracks at the same time.
3. Turn on both Body Horizontal and
Body Rotation.
4. Select any other part of your biped.
The COM track controls become inactive. Note
thatLockCOMKeyingisstoringtheselected
controls.
5. Reselect the biped COM either by selec ting the
blue octahedron near the center of the biped’s
pelvis, or by clicking one of the three COM
track controls.
Lock COM Keying restores the selected
controls.
Inter face
Body Track Tools (Center of Mass Tracks)
Body Horizontal and B ody Vertical refer to the
center of mass’s translation axes while Body
Rotation focuses on its rotate axes. Once you
turn them on, you can move or rotate the COM
by either using the Transform gizmo, by entering
values in the Coordinate D isplay area (page 3–708).
Tip: You c an also set COM positions using the
Tension, Continuity and Bias values on the Key
Info rollout (page 2–954) (in the TCB group).
When you activate Body H orizon tal or Body
Vertical, you have access to advanced Biped
Dynamics parameters (page 3–916),suchas
Balance Factor (page 3–914) and Ballistic Tension
(page 3–914), which you can control from the
Key Info rollout (page 2–954) and Dynamics &
Adaptation rollout (page 2–980).
Note: Tension, Continuity, and Bias affect the
COM Body Vertical keys on ly when the value of
Dynamics Blend (page 3–932) is less than 1.0. To
turn g ravity off at a vertical center of m ass key, set
the value of Dynamics Blend to 0.0.
Tip: To view the way a parameter change affects the
animation, Turn on Trajectories (page 3–1025).
Keyed keys for COM tracks are color coded as
follows:
• Keys containing Body Horizontal tracks are red.
• KeyscontainingBodyVerticalareyellow.
• Keys containing Body Rotation are green.
Note: If a frame contains multiple keyed
COM tracks, the key’s color code is divided
accordingly.
Akey’scolorreflectsitskeyedCOMtracks.
Body Horizontal—Selects the center of mass
to edit horizontal biped motion.
The Body Horizontal track has a Balance Factor
(page 2–877) parameter that automatically orients
the biped to maintain balance. This saves the
animator from having to reposition the pelvis
when the biped leans forward, backwards, or
sideways.
Note: Biped Dy namics (page 3–916) parameters can
be animated from no effect to full effect at each
keyframe.