8

300 Chapter 12: Animation
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 tangent 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 Types
Key Info (Basic) dialog/rollout (page 2–299) >In/Out
Tangent Type flyouts
Status bar > Animation controls > Defa ult In/Out
Tangents For New Keys flyout
Select an animated object > Motion panel > Parameters >
Key Info (Basic) rollout
You can adjust the t angent t ype of the Bezier
transforms. This means you can adjust the
interpolation between keyframes to create
particular motion affects. By manipulating tangent
types, you can make something hes it ate, speed up,
slow down, or even stand still. Each key has two
tangents: one to define the interpolation b efore the
key, and a second to define interpolation follow ing
the key.
Tip: Youcanalsosetthedefaulttangenttype
through the
Default In-Out Tangents For New
Keys (page 3–764)
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 interpolation
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 binary 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 key
also sets the Out tangent of the prev ious 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
when you want to animate On/Off sw itching or
instantaneous changes from one value to the next.
Slow—Causes the interpolated rate of
change to slow down around the key. A slow In
tangent decelerates as it approaches the key. A
slow Out tangent begins slow and accelerates as it
leaves the key.
Fast— C auses the interpolated rate of
change to speed up around the key. The effect
is the opposite of using slow. A fast In tangent
acceleratesasitapproachesthekey.AfastOut