Apple Motion 3 - Manual (Page 467)

Chapter 5 Using Behaviors 467
 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: This value determines 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 Falloff Type is 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 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 object (or
objects) drift toward the target object. 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 Attracted To ,” “ Orbit Around ,” “ Spring ,” “ Vortex ”
Edge Collision
This is a good behavior to use if you’re setting up complex motion simulations and you
don’t want your objects exiting the Canvas. Objects with the Edge Collision behavior
applied either come to a stop or bounce off after colliding with the edge of the Canvas
frame. For example, if you apply the Throw behavior to an object and set the velocity to
send the object toward the edge of the frame, then apply Edge Collision, the object
will bounce off the edge of the frame according to the Bounce Strength parameter.
Animation path of a thrown object
affected by the Edge Collision behavior