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Smooth Rotation Controller 359
Smooth Rotation Controller
Main toolb ar > Curve Editor (Open) > Select a rotation
track i n the Track View hierarchy. > Track View menu bar
> Controller menu > Assign > Smooth Rotation
Graph Editors > Track View Curve Editor > Select a
rotation track in the Track View hierarchy. > Track View
menu bar > Controller menu > Assig n > Smooth Rotation
Animation menu > Rotation controllers > Smooth
Use Smooth Rotation when you want rotation to
have a smooth and natural look. Smooth rotation
funct ions the same as Linear Rotation, but uses
non-adjustable curved interpolation, and has the
following characteristics:
Displays no controllers, k ey properties, or
function curves
•MovekeysinTrackViewtochangetiming
Directly rotate objects in the v iewpor ts to
change rotation values
Spring Controller
Main toolbar > Curve Editor (Open) > Select a track in the
Track View hierarchy. > Track View menu bar > Controller
menu > Assign > Spring
Graph Editors > Track View Curve Editor > Select a
track in the Track View hierarchy. > Track V iew toolbar >
Controller menu > Assign > Spring
Animation menu > Position controllers > Spring
The Spring controller adds secondary dynamics
effectstoanypointorobjectposition.Theend
result is secondar y m ass/spring dy namics similar
to Flex. This constraint adds realism to generally
static animations.
When you apply Spring to an animated object,
itsoriginalmotionispreservedandsecondary,
velocity-based dynamics are applied. You can
control the object’s mass and drag. When you first
apply the controller , it constructs a virtual spring
between the object’s original position and where it
would end up after forces are applied to it.
You can adjust spring tension and dampening.
Increasing the tension creates a tighter spr ing ,
while increasing the dampening smoothes out
jitters in the motion. You can add external forces
like
Gravit y (page 2–69)
and
Wind (page 2–71)
to
affect the motion, and also add additional objects
whose motions ac t as springs.
Note: You can also assign the Spring controller
to animated vertices in Track View: Open the
object’s Master Poin t Controller hierarch y, select
the vertices, and assig n the Spring controller.