Apple Motion 3 - Manual (Page 411)

Chapter 5 Using Behaviors 411
Parameters in the Inspector
Increment: This pop-up menu lets you choose how the behavior’s effect progresses
over its duration in the Timeline. There are three options:
 Continuous Rate: This option uses the Scale Rate parameter to grow or shrink the
object by a steady number of pixels per second.
 Ramp to Final Value: This option grows or shrinks the object from its original size to
the specified percentage plus the original scale in the Scale To parameter. If the
behavior is shortened in the Timeline, the Grow/Shrink effect goes faster.
 Natural Scale: Enabled by default, this option uses an exponential curve to allow the
animation to progress slowly when the scale values are small and speed up when the
values are large. This creates the illusion that the scaling is occurring at a constant
speed.
Scale Rate/Scale To: Depending on the command chosen in the Increment pop-up
menu, the Scale Rate or Scale To parameter defines the speed and magnitude of the
effect. This parameter can be opened into X and Y subparameters by clicking the
disclosure triangle to the left. This lets you adjust the horizontal or vertical scale
independently.
Curvature: This parameter lets you adjust the acceleration with which this behavior
transitions from the original to the final size. Higher Curvature values result in an easing
into and out of the effect, where the object slowly starts to change size, and this
change gradually speeds up as the behavior continues. Curvature does not affect the
overall duration of the effect since that is defined by the length of the behavior in the
Timeline, minus the End Offset.
Note: The Curvature parameter is not available when the Increment parameter is set to
Natural Scale.
End Offset: A slider that lets you offset the end of the behavior’s effect relative to the
last frame of its position in the Timeline, in frames. Adjust this parameter to make the
behavior stop before the actual end of the behavior in the Timeline. Use this slider to
offset the end of the Grow/Shrink effect from the end of the object.
Motion Path
The Motion Path behavior lets you create a 2D or 3D motion path for an object to
follow. When you first apply the Motion Path behavior, it defaults to an open spline—a
straight line defined by two points at the beginning and end of the motion path. You
can also choose from preset path shapes, such as a closed spline, loop, rectangle, or
wave, or use a shape to define a path. A shape used as the source for a motion path
can be animated.