Apple Motion 2 - Manual (Page 377)

Chapter 5 Using Behaviors 377
Drift Attractor
Similar to the Attractor behavior, but by default objects within the area of influence
move toward the object of attraction and come to rest, rather than overshooting the
object of attraction and bouncing around.
Dashboard control
The Dashboard has controls for Affect, Strength, and Drag.
Parameters in the Inspector
Affect: A pop-up menu that limits which objects in your project are affected by the
Drift Attractor behavior. There are three options:
• All Objects: All objects in the Canvas are affected by the Drift Attractor behavior.
• Related Objects: The default setting. Only other objects that are within the same
layer as the object of attraction are affected.
• Specific Objects: Only objects appearing in the Affected Objects list are affected by
the Drift Attractor behavior.
• Affected Objects: A list that appears when Specific Objects is selected in the
Affect pop-up menu. Drag objects from the Layers tab into this list to be affected
by the Drift Attractor behavior. Drag the layer icon of objects in your project from
the Layers tab to add them to this list. Objects from any layer in a project can be
dragged to the Affected Objects list. To remove an object, select the object in the
list and click Remove.
Strength: A slider defining the speed with 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.
• 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.
Affects Parameters affected
Other objects Position
01112.book Page 377 Sunday, March 13, 2005 10:36 PM