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Changing Footsteps Using IK Keys

Footstep and Freeform modes both use the same underlying inverse kinematics
(IK) to animate the biped skeleton. Footstep gizmos are a method for
manipulating sequences of IK keys.

With inverse kinematics, you animate a hierarchy, such as a biped’s leg, by
animating a lower link in the hierarchy: for example, the biped’s foot. Inverse
kinematics is the opposite of forward kinematics. Forward kinematics doesn’t
use the hierarchy; for example, you might animate a leg by rotating the thigh.

Changing Footsteps Using IK Keys | 753

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