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306 Chapter 12: Animation
See Tangent Types (page 2–300) for detailed
informationoneachoftheavailabletangent
choices.
Tangent Copy—Copies the t angent type b etween
the t angents of the current key or between the
tangents of the previous a nd next key. Use t he
arrow buttons on either side of the Key Tangent
flyouts.
TheleftarrowoftheIntangentcopiestotheOut
tangent of the previous key.
The rig ht arrow of t he In tangent copies to the O ut
tangent of the cur rent key.
TheleftarrowoftheOuttangentcopiestotheIn
tangent of the cur rent key.
The right ar row of the Out tangent copies to the In
tangent of the next key.
Choosing B ezier Ta ngent Types—Sets the tangent
types for one or more keys in the same track using
the In and Out tangent flyouts.
B ezier S cale Controll er (Lock X)—Causes the X value
to affect a l l three axes of scale. The Y and Z values
are ignored and their function curves are not
displayed.
When X is locked, the Y and Z values are not
affected by changes in the X value. If you lock X
when a l l three axes are at identical values, alter the
Xvalue,andthenunlockX,theYandZvalues
remainwheretheywerewhileXretainsitsnew
value.
Motion panel > Parameters > Key Info
(Advanced) rollout
Controls in the rollout affect velocity in three ways:
• Control the absolute velocity at a key using the
In/Out values
• Average velocity over a specified amount of
time using Normalize Time
• Force constant velocity from one component
key to the next using Constant Velocity
In/Out—The In field displays the rate of change as
the parameter approaches the key. The Out field
displaystherateofchangeastheparameterleaves
the key.
These fields are active only for keys using the
Custom tangent type.
The number in the field is the rate of change
expressed as parameter units per Tick. By
changingthetwovaluesforX,Y,andZyouare
changing the length and angle of the tangent
handle.
Lock b ut ton —When on, changing one Custom
tangent changes the other by equal but opposite
amount. For example, if the Lock button is on and
the In value is 0.85, then the Out value is -0.85.