Apple Motion 2 - Manual (Page 390)

390 Chapter 5 Using Behaviors
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.
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 where they are.
Drag: The default value for Vortex is 0, which results in a stable vortex. Any other value
causes the vortex to decay and the object to spiral into the object of attraction.
Direction: A pop-up menu that lets you set whether objects move around in a
clockwise or counter-clockwise direction.
Related behaviors
“
Attracted To ,” “ Attractor ,” “ Drift Attracted To ,” “ Drift Attractor ,” “ Orbit Around ,” “ Spring ”
Wind
Apply the Wind behavior to an object to animate its position, and move it in a specified
direction. Unlike the Throw behavior, the velocity specified by the Wind behavior is a
continuous force, and its parameters can be keyframed to achieve gradual changes in
speed and direction.
The Wind behavior is better than the Throw behavior when you want to vary the speed
of the object being animated. You can either apply another behavior (such as
Randomize or Ramp) or keyframe the Velocity parameter of the Wind behavior to vary
the speed and direction at which the object moves. You cannot make gradual changes
in either speed or direction with the Throw behavior.
Dashboard control
The Dashboard lets you specify the direction and speed of the Wind behavior by
dragging an arrow within a circular region. The direction of the arrow defines the
direction of movement, and the length of the arrow defines speed. A slider at the right
lets you adjust the scale of the Dashboard control, increasing or decreasing the effect
the control has over the object.
Affects Parameters affected
Object Position
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