Changing the Offset of Parameter Behaviors
Many Parameter behaviors have two additional parameters, Start Offset and End Offset,
which are used to change the frame where a Parameter behavior’s effect begins and
ends.
The Start Offset parameter has a slider that lets you delay the beginning of the behavior’s
effect, relative to the first frame of its position in the Timeline. You can adjust this
parameter to make the Parameter behavior start later.
The End Offset parameter lets you offset the end of the behavior’s effect relative to the
last frame of its position in the Timeline. Using this slider to stop the effect, instead of
trimming the end of the behavior in the Timeline, lets you freeze the behavior’s effect
on the object for its remaining duration.
The following example illustrates how to use the Start Offset and End Offset parameters
with the Ramp behavior.
To use the Start Offset and End Offset parameters
1
Select an object, such as a shape.
2
In the Properties Inspector, Control-click the Scale parameter, then choose Add Parameter
Behavior > Ramp from the shortcut menu.
The Ramp behavior is applied to the Scale parameter of the object, and the Behaviors
Inspector opens. The Ramp behavior lets you create a gradual transition in any animateable
parameter.
3
Set the Start Value to 0 and the End Value to 200, then play the project.
The object scales from its original scale to twice its original size over the duration of the
object.
4
Set the Start Offset to 90 and the End Offset to 90.
The object does not begin scaling until frame 90, and stops scaling 90 frames from its
last frame in the Timeline.
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Chapter 9
Using Behaviors