9

Key Info Rollout 955
• Set IK constraints and pivots for the biped
hands and feet.
When the Body Vertical COM (center of mass)
track is active, you can change the vertical
dynamics of the motion, on a key-by-key basis.
When the Body Hor izontal COM track is active
you can change the balance factor for shifts in
weight distribution.
Note: OnthetimesliderorinTrackView,youcan
move one Biped key past another. See Moving Keys
(page 2–1004).
Activating Pa rameters
Groups of the Key Info rollout are unavailable
depending on what part of the biped is selected
and if a key is current. Body Vertical, Body
Horizontal,andBody Rotation refer to the three
tracks used to animate the biped center of mass.
Selectoneofthethreecenterofmasstrackson
the Track Selection rollout, then use Next Key or
PreviousKeytofindakeytoedit.
• If Bo dy Vertical is ac tive and a key is cur rent,
then parameters for Dynamics Blend, Ballistic
Tension, Z Position, Time, and TCB parameters
(Tension, Continuity and Bias) are active.
Ballistic Tension is available only at keys just
before or just after an airborne state, as between
footsteps in a run or jump.
Note: TCB controls are not effective at
Body Vertical keys just before and just after
an airborne period, b etween footsteps, if
Dynamics Blend=1. Biped Dynamics calculates
theairbornetrajectory;inthiscase,lower
the va lue of Dynamics Blend to use the TCB
controls. In a walk sequence where footsteps
overlap, Dynamics Blend has no effect and TCB
controls can be used.
• If Body Horizontal is selected and a key is
current, the B alance Factor parameter, XY
Position, Time, and TCB parameters are active.
Z Position, D ynamics Blend, Ballistic Tension
are gray ed.
• IfBodyRotationisselectedandakeyiscurrent,
onlytheTimeandTCBparametersareactive.
• Ifabipedhandisselectedandakeyiscurrent,
then all parameters are act ive except parameters
in the Body Dynamics group.
• If a biped foot key is selected and cur rent, t hen
all parameters are active except for parameters
in the Body Dynamics group.
• If a biped leg is selected and a key is current,
then Time and TCB parameters are active. XYZ
Position and B ody Dynamics parameters are
made unavailable. In a footstep animation,
Time is made unavailable at a Touch and Lif t
key.
• Ifabipedarmisselectedandakeyiscurrent,
then Time and TCB parameters are active. XYZ
Position and B ody Dynamics parameters are
made un available.
Interfa ce
The Key Info rollout is div ided up into several
groups: TCB, IK, Head, B ody, and Prop. You can
expand and hide each of these g roups by clicking
on the line next to its name.
Next Key-Previous Key—Find the next or
previous keyframe for the selec ted biped part.
The field displays the key number.