5

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 affected object. You can apply another behavior (such as Randomize or Ramp) or
keyframe the Velocity parameter of the Wind behavior to vary the speed and direction
of the object. You cannot make gradual changes in speed or direction with the Throw
behavior.
Parameters in the Inspector
Affect Subobjects: This parameter appears when this behavior is applied to an object
that contains multiple objects, such as a group, a particle emitter, a replicator, or a text
layer. When this checkbox is selected, all objects in the parent object are affected
individually. When this checkbox is deselected, all objects in the parent object are affected
by the behavior together.
Air Thickness: A slider and value slider that adjust how fast the object accelerates on the
X, Y, or Z axis when the speed is changed. Lower values (simulating thinner air) have less
effect when pushing the object, so it takes longer to get up to speed. Higher values
(thicker air) have more effect and push the object up to speed more quickly.
Velocity: A slider and value slider that adjust the speed on the X, Y, or Z axis where the
simulated air is blowing the object. Higher values result in faster motion.
476 Chapter 9 Using Behaviors