Apple Motion 2 - Manual (Page 376)

376 Chapter 5 Using Behaviors
Dashboard control
The Dashboard has an object well you can use to assign an object of attraction, as well
as sliders for Strength and Drag. When applied to a layer or group (such as particles,
text, or the replicator), the Affect Objects checkbox also appears in the Dashboard.
Parameters in the Inspector
Affect Objects: This parameter appears when this behavior is applied to an object that
contains multiple objects, such as a layer, particle emitter, replicator, or text object.
When this checkbox is turned on, all objects within the parent object are affected
individually. When this checkbox is turned off, all objects within the layer are affected
by the behavior together, as if they were a single object.
Object: An object well that defines the object of attraction. To set the defined target
object, drag the object from the Layers tab to the object well in the Drift Attracted To
Dashboard or Inspector. In the Layers tab, you can also drag the target object onto the
Drift Attracted To behavior.
Strength: A slider defining the speed at which the object moves toward the object of
attraction. With a value of 0, the object doesn’t move at all. The higher the value, the
faster the object moves.
Falloff Type: A pop-up menu that determines whether the distance defined by the
Influence parameter falls off linearly or exponentially.
• Linear: Object attraction falls off in proportion to the object’s distance.
• Exponential: The closer an object is within the area of influence, the stronger it’s
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. When Falloff Type is set to Exponential, object
attraction falls off with distance. When Falloff Type is set to Linear (default), the
attraction falls off uniformly. 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.
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 that
are outside of the area of influence remain where they are.
Drag: A slider that can be used to reduce the distance attracted objects overshoot the
object of attraction. Lower Drag values result in the object overshooting the object of
attraction, moving past and then careening back around toward the target object
again and again. Higher Drag values result in the object coming to rest sooner.
Related behaviors
“
Attracted To ,” “ Attractor ,” “ Drift Attractor ,” “ Orbit Around ,” “ Spring ,” “ Vortex ”
01112.book Page 376 Sunday, March 13, 2005 10:36 PM