5.5

353Motion User Guide
• Affected Objects: A list that appears when Specific Objects is chosen in the Affect pop-
up menu. Drag objects from the Layers list into this list to have the objects affected by
this behavior. To remove an item from the list, select the item and click Remove. The
Affected Objects list contains the following columns:
• Layer: This column lists the name of the layer containing the object.
• Name: This column lists the name of the object.
• Strength: A slider that sets the speed at which attracted objects move toward the target
object. With a value of 0, attracted objects don’t move at all. The higher the value, the
faster attracted objects move.
• Falloff Type: A pop-up menu that determines whether the distance defined by the
Influence parameter falls off linearly or exponentially. There are two menu items:
• 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: A slider that sets 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: A slider that reduces 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.
• Include X, Y, and Z: Buttons that specify the space in which the object (or objects)
moves toward the target object. For example, when X and Y are enabled, the object
moves in the XY plane; when Y and Z are enabled, the object moves in the YZ plane.
Drag behavior in Motion
The Drag behavior simulates the force of friction on a moving object, slowing it down
over time. Applying the Drag behavior is an easy way to decelerate objects with multiple
behaviors that create complex motion.
Adjust this behavior using the controls in the Behaviors Inspector:
• Affect Subobjects: A checkbox, available 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 enclosed in the parent object are affected
individually. When this checkbox is deselected, all objects enclosed in the parent object
are affected by the behavior together.
• Amount: Sliders that slow down an object over time, causing it to eventually come to a
stop. Higher Drag values result in the object coming to rest sooner. Click the Amount
disclosure triangle to adjust the drag applied to the X, Y, and Z values separately. An
example of this is to create a situation where an object’s vertical speed slows down
faster than its horizontal speed.