Apple Motion 2 - Manual (Page 386)

386 Chapter 5 Using Behaviors
Repel From
While the Repel behavior pushes other objects away, the Repel From behavior has the
converse effect, making the object it’s applied to move away from a selected object in
the Canvas.
Dashboard control
The Dashboard has an image well you can use to assign an object to move away from,
as well as controls for Strength, Falloff Type, Falloff Rate, Influence, 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 image well that defines the object to be repelled from.
Strength: A slider defining the speed at which the object is repelled. With a value of 0,
the object is not repelled at all. The higher the value, the faster the object is repelled.
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 stronger it’s
repelled, and the faster it moves
away from the object doing the repelling.
Falloff Rate: This value determines how quickly the force of repulsion 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 away from the object of repulsion. 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
away from the object of repulsion. Objects
that are outside of the area of influence remain where they are.
Affects Parameters affected
Other objects Position
01112.book Page 386 Sunday, March 13, 2005 10:36 PM