Apple Motion 5.1.1 - Manual (Page 364)

Chapter 9 Behaviors 364
Repel
If you apply the Repel behavior to an object, that object pushes away all other objects within
the area of influence in the Canvas. The strength with which objects are pushed away can be
increased or decreased, as can the distance repelled objects travel.
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You can also specify which objects are affected by this behavior, creating an effect where only
specific objects are moved, while others remain still.
The Repel behavior is the opposite of the Attractor behavior, and is part of a group of simulation
behaviors that create complex animated relationships between two or more objects.
Parameters in the Inspector
•
Affect: A pop-up menu that limits which objects in your project are affected by the Repel
behavior. There are three options:
•
All Objects: All objects in the Canvas are affected by the Repel behavior.
•
Related Objects: The default setting. Only other objects in the same group as the repelling
object are affected.
•
Specific Objects: Only objects appearing in the Affected Objects list are affected by the
Repel behavior.
•
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 be affected by the Attractor behavior
when the Specific Objects option is selected in the Affect pop-up menu. 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 defines the speed at which repelled objects move away from the object.
With a value of 0, repelled objects don’t move at all. The higher the value, the faster repelled
objects move.
•
Falloff Type: A pop-up menu that determines whether the distance defined by the Influence
parameter falls off linearly or exponentially.
•
Linear: Repulsion between objects 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
repelled, and the faster it moves away from the object doing the repelling.
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