9

Tangent Types 305
Note:
In the Key Info dialog for the Bezier Scale
controller, a Lock button is displayed beside the X
Scale spinner. If you click Lock X, only the X value
affects all 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
aren’t affected by changes in the X value. If you
clickLockXwhenallthreeaxesareatidentical
values, alter the X value, and then unlock X . T he
Y and Z values remain where they were while X
retains its new value.
Key Tangent Flyouts—With B ezier controller types,
sets the interpolation properties of the In tangent
and Out tangent of the key. For details, see Tang e nt
Types (page 2–305).
Ta ngent Copy buttons—Use the arrow buttons at
either side of the Key Tangent flyouts to copy the
tangent type between the tangents of the current
key or between the tangents of the previous and
next key.
• The left arrow of the In tangent copies to the
Out tangen t of the previous key.
• The right arrow of the In tangent copies to the
Out tangent of the current key.
• The left arrow of the Out tangent copies to the
Intangentofthecurrentkey.
• The right arrow of the Out tangent copies to the
In tangent of the next key.
Ta ngen t Ty pes
Key Info (Basic) dialog/rollout (page 2–304) >In/Out
Tangent Type flyouts
Status bar > Anim ation controls > Default In/O ut
Tangents For New Keys flyout
Select an animated object > Motion panel > Parameters >
Key Info (Basic) rollout
You can adjust the tangent t ype of the Bezier
transforms. This means you can adjust the
interpolation between keyf r ames to create
particular motion effects. By manipulating tangent
types, you can make something hesitate, speed up,
slow down, or even stand still. Each key has two
tangents: one to define the interpolation before the
key, and a second to define in terpolation following
the key.
Tip: You can also set the default tangent t ype
through the Default In-Out Tangents For New Keys
(page 3–721) flyout. By doing so, each new key
created with Set Key Mode or Auto Key Mode
follows the curve interpolation set by the default
tangent type.
Smooth—Creates smooth inter polation
through the key.
Linear—Creates linear interpolation at
the key.
Alineartangentaffectsthecurvenearthekeyonly.
Full linear interpolation between two keys occurs
only when the Out tangent of the first key and the
In tangent of the next key both use a linear tangent.
Step—Creates binar y interpolation
from one key to the next. Step tangents require a
matched set between the Out tangent of one key
and the In tangent of the next key.
Choosing Step for the In tangent of the current k ey
also sets the Out tangent of the previous key to
Step. Likewise, choosing Step for the Out tangent
of the current key also changes the In tangent of
the next key to Step.
Using Step tangents, the outgoing value of a
keyisheldconstantuntilthetimeofthenext
key is reached. The value then abruptly jumps
tothevalueofthenextkey. Usethistangent