Apple Motion 5.1.1 - Manual (Page 316)

Chapter 9 Behaviors 316
Basic Motion behaviors
Basic Motion behaviors overview
Basic Motion behaviors animate specific parameters of the object to which they are applied.
Some affect position, while others affect scale, rotation, or opacity.
WARNING: Building consecutive Basic Motion behaviors or placing such a behavior before
or after the Camera Framing behavior can create unexpected results. These behaviors can
continue to affect the object even after the behavior ends, thus influencing the subsequent
behavior’s animation path. For example, if a Framing behavior is applied after a Motion Path
behavior, the residual effect of the Motion Path behavior is combined with the animation
path generated by the Framing behavior. Consequently, the target object might be
framed improperly.
For a description of each Basic Motion behavior, see the behavior list in the Help table of
contents (the sidebar to the left of this window).
Fade In/Fade Out
The Fade In/Fade Out behavior lets you dissolve into and out of any object by ramping the
opacity of the object from 0 percent to 100 percent at the start, and then back to 0 percent at
the end. You can eliminate the fade-in or fade-out effect by setting the duration of the Fade In
Time or Fade Out Time to 0 frames.
Note: This behavior is multiplicative. This means that the Fade In and Fade Out parameters are
multiplied by the object’s current opacity to produce the resulting level of transparency.
The Fade In/Fade Out behavior is useful for introducing and removing animated elements. For
example, you can apply the Fade In/Fade Out behavior to text that moves across the screen to
make it fade into existence, and then fade away at the end of its duration.
Note: The Fade In/Fade Out behavior cannot be applied to a camera or light.
Parameters in the Inspector
•
Fade In Time: A slider defining the duration, in frames, over which the object fades in from 0
to 100 percent opacity from the first frame of the object. A duration of 0 frames results in a
straight cut into the object, making it appear instantly.
•
Fade Out Time: A slider defining the duration, in frames, over which the object fades out from
100 to 0 percent opacity at the last frame of the object. A duration of 0 frames results in a
straight cut-away from the object, making it disappear instantly.
•
Start Offset: A slider that lets you delay the beginning of the behavior’s effect relative to its first
frame in the Timeline. Adjust this parameter to make the behavior start later. This parameter
value is measured in frames.
•
End Offset: A slider that lets you offset the end of the behavior’s effect relative to its last frame
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 Fade Out effect
from the end of the object.
Controls in the HUD
The HUD lets you set the Fade In and Fade Out durations with a graphical control. Drag
anywhere in the shaded area of the Fade In or the Fade Out ramp to adjust the duration of
the effect.
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