Apple Motion 3 User Manual
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Chapter 5
Using Behaviors
Note: The Simulation behaviors do not leave the object at the transformed state after
the last frame of the trimmed behavior. For more information, see “
Controlling Simulation Behaviors
Keep in mind that the ideal use for behaviors (with the exception of the Motion
Tracking behaviors) is creating fluid motion graphics that do not require specific timing.
This is especially true with the Simulation behavior group, which allows you to create
some very sophisticated interactions among multiple objects in your project with
minimal editing.
Unlike Basic Motion behaviors, you cannot stop or change the motion of a Simulation
behavior in the Timeline. However, you can affect the rate of a Simulation behavior by
modifying its duration in the Timeline. You can also change the starting frame of the
behavior.
But because the Simulation behaviors simulate natural effects, such as Gravity, the laws
of inertia apply—an external force set the object in motion, and that object stays in
motion even once the active force is no longer present. Changing the duration of a
Timeline bar for a Simulation behavior does stop the “active” force on the object, but
does not stop the motion of the object. You can, of course, control Simulation
behaviors by modifying their parameters.
In the following image, the Orbit Around (Simulation) behavior is applied to the large
circle. The center text is assigned as the object that the circle moves around. The red
animation path represents the motion the circle travels over its duration. The Orbit
Around behavior is the same duration (300 frames) as the large circle to which it is
applied.
The Orbit Around behavior, applied to the large circle, is the same duration as the object to which it is
applied. The red animation path shows the motion of the circle over its duration.