8

TCB Controllers 363
The following descriptions refer to both the TCB
graph and the funct ion curve as the animation
cur ve.
Note: When you are changing the properties of a
selection of multiple keys, t he TCB graph is blank
unless all properties are equal.
Ease To—Slows the velocity of the animation curve
as it approaches the key. Default=0.
High Ease To causes the animation to decelerate
as it approaches the key.
The default setting causes no extra deceleration.
Ease From—Slows the velocity of the animation
curveasitleavesthekey.Default=0.
High Ease From causes the animation to start slow
and accelerate as it leaves the key.
The default setting causes no change of the
animation curve.
Tension—Controls the amount of curvature in the
animation curve.
HighTensionproducesalinearcurve.Italsohasa
slight Ea se To and Ease From effect.
Low Tension produces a very wide, rounded,
cur ve. It also has a slight negative Ease To and
Ease From effect.
Thedefaultvalueof25producesanevenamount
of curvature through the key.
Co ntinuity—Controls the tangential property of
thecurveatthekey. Thedefaultsettingisthe
only value that produces a smooth animation
curvethroughthekey.Allothervaluesproducea
discontinuity in the animation curve causing an
abrupt change in the animation. D efault=25.
High Continuit y values create curved overshoot
on both sides of the k ey.
Low Continuity values create a linear animation
curve. Low continuity creates a linear curve
similar to high tension except without the Ease To
andEaseFromsideeffect.
The default setting creates a smooth continuous
curve at the key.
Bias—Controls where the animation curve occurs
w ith respect to the key. Default=25.
High Bias pushes the curve beyond the key. This
produces a linear curve coming into the key and
an exaggerated curve leaving the key.
Low Bias pulls the curve b efore the key. This
produces an exaggerated curve coming into the
key and a linear curve leaving the key.
The default setting distributes the curve evenly to
both sides of the key.
Rotation W indup ( TCB rotation only)—When on,
rotation keys can be greater than 180 degrees.
When off, rotation k eys are always less than 180
degrees. This is useful if you want to set a s ingle
rotation key to create multiple revolutions of an
object. Default=off.
Wa rn in g: If you have Rotation Windup on and you
insert a rotation key between two previously created
rotation keys, you might get unexpec ted directional
shifts. Rotation Windup works best if you set keys using
astraight-aheadworkflow.