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948 Chapter 14: character studio

Body Ver tical—Selects the center of mass to

edit vertical biped motion.

The B ody Vertical track uses the Dynam ics

Blend parameter to control gravity in a footstep

animation. A Dynamics Blend value of 1.0 uses

the va lue of GravAccel (page 3–950) (g lobal gravit y

value) to calculate an airborne trajectory for the

biped. No keyframes are required to position

the biped in the air, a trajectory is ca lculated

automatically. A value of 0.0 uses Spline Dynamics

for the vertical position of the biped; you must

create keyframes to position the biped vertically.

The Bo dy Vertical track also has a Ballistic Tension

(page 3–914) parameter that controls how much

the biped k nees b end when the biped lands from

an airborne period. This means that keys do

not need to b e created at the lowest position of

the biped after landing; a trajectory is calculated

automatically.

Note: You can create keys manually to override the

calculated trajectory during the landing period.

However, vertical keys must have Dynamics

Blend=0.0 in order to fully override the trajectory

during the airborne period.

B ody R otation—Selects the center of mass to

edit biped rotational motion.

Lock COM K ey ing—When on, allows you to

select multiple COM tracks at the same time. Once

locked, the tracks are stored in memor y, and are

remembered ever y t ime the COM is selected.

Note: Lock ed COM tracks are also honored after a

scene reset or a session change.

Symmetrical—Selects the matching object

on the other side of the biped. For example, if the

right arm is selected, clicking Symmetrical Tracks

selects the left arm too. You can then make changes

to both sides of the body at once. Symmetrical

works for single and multiple biped parts.

Opposite—Selects the matching object on the

other side of the biped, and deselects the current

object. For example, if the ri ght arm is selected,

clicking Opposite Tracks selec ts the left arm and

deselects the right arm. Opposite Tracks can be

usedforsingleormultipleobjects.