Wind – Apple Motion 4 User Manual
Page 520
•
•
•
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 of the object. You cannot make gradual changes in either 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 within the parent object are affected
individually. When this checkbox is deselected, all objects within the parent object are
affected by the behavior together, as if they were a single object.
Air Thickness:
A slider and value slider that adjusts 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 at which
the simulated air is blowing the object. Higher values result in faster motion.
520
Chapter 9
Using Behaviors