Balance Poses
In the pose
slider window for 2001thom.mdl, we see 2 poses called Balance and Balance
Rigid.

These poses control the centering of the hips when KfootLeft and
KfootRight are moved

open up the 2001Thom.mdl and expand the bone heirarchy in the Project Workspace.

as you can see, there are couple sets of bones and nulls that help center
the feet. the bones we'll worry about
right now are Balance Right Foot, Balance Left Foot, Balance Base, Balance
Point, Balance Feet Center,
and Balance Base Aim.

Drag the IKLegs_DoNotTouch pose slider intothe action.
This will set up the legs so we can see more clearly what the balance
slider does
Also, try to test each constraint you apply during each step
The Balance Base aims at the Balance Base Aim bone

The Balance Point has a Kinematic Constraint applied to
Balance Left Foot.
The Balance Right foot and balance left foot are translated
to the KfootRight and KfootLef

The balance Right foot and Balance Left Foot also have translate
limits (0 units on the y-axis)

When these constraints are applied, you should hide the Balance RightFoot
and Balance Left Foot to avoid confusion
The Balance Feet Center null translates to both KfootRight
, and KfootLeft.

Here's how its activated:
The only constraint in the Steady pose slider is the hips
witha Translate to
constraint to the balance point bone.

When the Kfeet nulls move, the Balance Feet Center null stays
between them, with the balance base aim bone,
leading the Balance base bone centered between the feet. Because
the hip bone
is translating to the balance point, it stayscentered between thelegs.
it's kind of complicated to explain, but if you've been experimenting, it
should all make sense.
Balance Base rigid and Balance Point Rigid are set up the same
way, but Balance Base has a
Translate to constraint to KfootRight, and balance
point Rigid has a kinematic constraint to KfootLeft
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