Apple Motion 4 - Manual (Page 517)

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.
Amount: A slider that can be used to slow down an object’s rotation over time, causing
it to eventually come to a stop. Higher Amount values result in the rotation ending sooner.
HUD Controls
The HUD lets you control the amount of drag. When applied to an object that contains
multiple objects (such as a group, particles, text, or the replicator), the Affect Subobjects
checkbox also appears in the HUD.
Related Behaviors
• Drag
Spring
The Spring behavior creates a relationship between two objects, so that an object with
the Spring behavior applied to it moves back and forth around a second object. The
Attract To parameter defines the object that serves as the target and center of the Spring
behavior. Additional parameters let you adjust the speed of the behavior (Spring Tension)
and the acceleration of the object at each change in direction (Relaxed Length).
If the Attract To object is at rest, the resulting motion is fairly simple and the springing
object moves back and forth in a straight line. If the Attract To object is in motion, the
springing object’s motion will be much more complex, changing direction according to
the velocity of the Attract To object.
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.
Attract To: An image well that defines the object of attraction. To set the defined target
object, drag the object from the Layers tab to the Attract To well in the Spring HUD or
Inspector. In the Layers tab, you can also drag the target object onto the Spring behavior.
Spring Tension: A slider that determines how fast the object is pulled toward the object
of attraction.
Relaxed Length: The distance from the target object at which object attraction diminishes
to zero. As the springing object’s distance increases past this point, the force of attraction
increases proportionally, to bring it back toward the target object.
517 Chapter 9 Using Behaviors