5

HUD Controls
The HUD lets you control the Fade In and Fade Out durations, equivalent to the Fade In
Time and Fade Out Time parameters in the Behaviors Inspector. Drag anywhere in the
shaded area of the Fade In or the Fade Out ramp to adjust their durations.
Note: Continue dragging beyond the limits of the graphical HUD control to extend the
durations of the Fade In or Fade Out.
Fade out
Fade in
Grow/Shrink
Use the Grow/Shrink behavior to animate the scale of an object, enlarging or reducing
its size over time at a speed defined by the Scale Rate or Scale To parameter. The
Grow/Shrink effect begins at the object’s original size at the first frame of the behavior.
Note: The Grow/Shrink behavior cannot be applied to cameras or lights.
Tip: To scale particles over their lifetime, use the Scale Over Life particle behavior. For
more information, see Using Particles Behaviors.
Note: The vertical and horizontal growth rates can be set to independent values, for
asymmetrical effects.
The Grow/Shrink behavior is a good one to use with high-resolution graphics to zoom
into an image, such as a map or photograph. You can also combine this behavior with
the Throw or Wind behavior to pan across the image while zooming into it.
The Grow/Shrink behavior can also be used to emphasize or de-emphasize images in
your project. You can enlarge objects to make them the center of attention, or shrink an
object while introducing another to move the viewer’s eye to the new element.
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.
399Chapter 9 Using Behaviors