5

Parameters in the Inspector
Affect Subobjects: This parameter appears when this behavior is applied to an object
that contains multiple objects, such as a group, a particle emitter, a replicator, or a text
layer. When this checkbox is selected, all objects in the parent object are affected
individually. When this checkbox is deselected, all objects in the parent object are affected
by the behavior together.
Object: A well that defines the object to orbit around. To set the defined target object,
drag the object from the Layers list to the Object well in the Orbit Around HUD or
Inspector. In the Layers list, you can also drag the target object onto the Orbit Around
behavior.
Strength: A slider defining the speed of the object.
Falloff Type: A pop-up menu that determines whether the distance defined by the
Influence parameter falls off linearly or exponentially. The default is Linear.
• Linear: Object attraction falls off in proportion to the object’s distance.
• Exponential: The closer an object is within the area of influence, the more strongly it
is attracted, and the faster it moves toward the object of attraction.
Falloff Rate: This value determines how quickly the force of attraction between objects
affected by this behavior falls off. A low Falloff Rate value results in objects quickly getting
up to speed as they move toward the object of attraction. A high Falloff Rate causes
objects to accelerate much more slowly. When set to Exponential, the attraction falls off
more quickly than when set to Linear.
Influence: A slider that defines the radius of the circle of influence in pixels. Objects that
fall within the area of influence move toward the object of attraction. Objects outside
the area of influence remain in place.
Drag: The default value for Orbit Around is 0, which results in a stable orbit. Any other
value causes the orbit to decay and the object to spiral into the object of attraction.
465Chapter 9 Using Behaviors