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960 Chapter 14: character studio
Note:
When on an IK key, the left hand and foot
charts use a blue/red color scheme:
Join to Previous IK K ey—When on, places the biped
footinthecoordinatespaceofthepreviouskey.
Turn off to put the biped foot into a new reference
position.
Turn off and move the biped foot to create a sliding
footstep, for example.
Body—The biped limb is in biped coordinate
space.
Object—Object Space: the biped limb is either in
World coordinate space or the coordinate space of
the selected IK object. Coordinate space can be
blended between keys.
S e l ect I K O bject —Chooses an object for the
biped’shandorfoottofollowwhenIKBlendis1
and Object is selected. The selected object’s name
is displayed next to the button.
This selection cannot be animated; only one
IKobjectcanbeactiveforeachhandandfoot
throughout the animation.
Tip: If you want to change the object the hand or
foot follows at different times in the animation,
select a dummy object as the IK object, and assign
a Link Constraint to the dummy object to ma ke it
link to different objects at d ifferent times.
Head group
The Head group lets you define a target object for
the target to look at.
Target Blend—Determines the extent to which the
target blends w ith the head’s existing animation.
A setting of 1.0 causes the head to look directly at
the target, 0.5 causes the head to blend half of its
existing animation with looking at the target, and
a setting of 0.0 causes the head to ignore the target,
maintaining its existing animation.
Select Look At Target—Click to select an object
for the head to look at.
Note: When an object is selected, its name is
displayed next to the button.
Body group
These parameters apply to the biped center
of mass and are used by character studio to
calculatethebiped’sairbornetrajectorybasedon
gr avity (GravAccel) and time between footsteps,
theamountofkneebendonlanding(Ballistic
Tension) and how the biped objects adapt to
maintain ba lance (B alance Factor).
Balance Factor—Position the biped’s weight
anywhere along a line that extends from the
center of mass to the biped’s head. This center of
mass (B o dy Horizont al track) parameter can be
keyframed. To activate Balance Factor select the
Horizontal T rack (in the T rack Selection rollout),