Apple Motion 3 - Manual (Page 466)

466 Chapter 5 Using Behaviors
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 in place.
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.
Include X, Y, and Z: Buttons that allow you to specify the space in which the affected
object (or objects) drifts toward the object to which it is attracted. For example, when X
and Y are enabled, the object drifts in the XY plane; when Y and Z are enabled, the
object drifts in the YZ plane.
Related Behaviors
“
Attracted To ,” “ Attractor ,” “ Drift Attractor ,” “ Orbit Around ,” “ Spring ,” “ Vortex ”
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.
HUD Control
The HUD has controls for Affect, Strength, Drag, and axis assignment.
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
group 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 chosen in the Affect
pop-up menu. Drag objects or groups from the Layers tab into this list to be
affected by the Drift Attractor behavior. To remove an item from the list, select the
item 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.