9

306 Chapter 12: Animation
when you want to animate On/Off switching or
instantaneous changes f rom one value to the next.
Slow—Causestheinterpolatedrateof
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.
Fas t—Causestheinterpolatedrateof
change to speed up around the key. The effect
is the opposite of using slow. A fast In tangent
acceleratesasitapproachesthekey. AfastOut
tangentbeginsfastanddeceleratesasitleavesthe
key.
Cust om—Displays adjustable tangent
handles at the key in Function Curves mode in
3ds Max.
Flat Tangent— Displays a s mooth
int erpolation type designed to eliminate overshoot
with no editable handles. Tangent slopes
automatically take the most direct route to the
next key value.
See also
Default In/Out Tangents For New Keys (page 3–721)
K ey I nfo (Advanced)
Rollout/Dialog
Select an object > Motion panel > Parameters > Key Info
(Advanced) rollou t
Select an animated object in the viewport. > Right-click
a key in track bar. > Cho ose th e nam e o f the controller
track such as Sphere01: Z Position. > Key Info dialog >
Click Advanced.
Parameter Collector (page 1–138) >ClickaProperties
button. > Key Info dialog > Click Advanced.
The Key Info (Advanced) rollout or dialog lets you
control velocity in three ways:
• You can specify the absolute velocity at a key
using the In/Out fields.
• You can average velocity over a time period
using Normalize Time.
• With certain controller types, you can force
constant velocity from one component key to
the next using Constant Velocity.
If you are creating Path animation, you can force
constant velocity by placing a Normalize Spline
modifier (page 1–747) onthesplineusedasapath.
See also
Key Info (Basic) Rollout/Dialog (page 2–304)
Procedure
To set normalize time for a k ey:
1.
Select an object and choose a key to Normalize.
YoucanusethearrowsintheKeyInfo(Basic)
rollout to step through Keyframes.
2. In the Key Info (Advanced) rollout, click
Normalize Time.
Thekeyismovedintimetoaveragethevelocity
through the key.