Apple Motion 2 - Manual (Page 370)

370 Chapter 5 Using Behaviors
Note: The Align to Motion behavior does not work on objects animated using the
Motion Path behavior. Instead, use the Snap Alignment to Motion behavior (in the Basic
Motion subcategory).
Unlike the Snap Alignment to Motion behavior, which produces absolute changes in
rotation that precisely match changes in direction, Align To Motion has a springy
reaction, and creates a more lively effect.
In the above example, the fish travels along the keyframed animation path, but it isn’t
actually pointed in the proper direction. Using the Align To Motion behavior, its angle
of rotation moves so that it points in the direction of the animation path. By adjusting
the Drag parameter, you can make it careen wildly about its anchor point as it goes
around curves in the animation path.
Dashboard control
The Dashboard has controls for Axis, Invert Axis, Spring Tension, and Drag. When
applied to a layer or group (such as particles text, or the replicator), the Affect Objects
checkbox also appears in the Dashboard.
Parameters in the Inspector
Affect Objects: This parameter appears when this behavior is applied to an object that
contains multiple objects, such as a layer, particle emitter, replicator, or text object.
When this checkbox is turned on, all objects within the parent object are affected
individually. When this checkbox is turned off, all objecst within the layer are affected
by the behavior together, as if they were a single object.
Axis: A pop-up menu that lets you align the target object’s rotation to the X or Y value
of its position.
Before using Align To Motion After using Align To Motion
Affects Parameters affected
Object Rotation
01112.book Page 370 Sunday, March 13, 2005 10:36 PM