4 On the Bend Links rollout turn on Twist
Links Mode.5 Select the Bip01 Spine object. This is the lowest spine object in the biped.6 Go to frame 0 and rotate the object slightly about the X axis to add a
key. Do the same about the Y axis.7 Move the time slider to frame 27 and rotate approximately 10 degrees
about the X axis so the spine rotates following the swing of the arms.
The blue arm is swinging forward, so rotate the spine to match.8 You can also rotate –1 degree about the Y axis.
The slight rotation of the first spine object results in a larger effect further
up the hierarchy.9 Repeat at frame 37 in the opposite direction to match the swinging of
the green arm outward.10 Save the scene as MyWalk06.max.You have animated a simple walk cycle using freeform animation and IK
constraints.You can use the footstep method of animation to create a walk cycle
automatically. To learn about this technique, see Creating a Distinctive Walk
on page 709.Using Controllers with Biped
You can add controllers on top of Biped animations to create a wide variety
of effects. You can use scale controllers to create stretchy legs or arms for
cartoon animation, or create the illusion of breathing by adding a scale
controller on the spine objects in the chest. You can add noise rotation
controllers to the spine to make a biped shake while he walks, or to create
twitching or random motion in the limbs or head.Controllers can be added in the Motion panel, Assign Controllers rollout, or
by using the Workbench.Although this lesson is performed with footsteps, it could have been
accomplished just as easily with a freeform animation.Using Controllers with Biped | 825