Apple Motion 4 - Manual (Page 497)

Drag: A slider that adjusts whether or not the change in rotation made by this behavior
overshoots the new direction of the object. Low drag values result in springy changes in
rotation, where the object rotates back and forth as it overshoots changes in direction.
High drag values dampen this effect, making the object’s rotation stick more closely to
the changes made in rotation. Higher values also cause the object’s rotation to lag behind
the object’s change in position.
HUD Controls
The HUD has controls for the Rotation Axis, Axis, Invert Axis, Spring Tension, and Drag
parameters. When applied to a group or layer that contains multiple objects (such as
particles, text, or a replicator), the Affect Subobjects checkbox also appears in the HUD.
Related Behaviors
• Snap Alignment to Motion
Attracted To
This behavior is part of a group of Simulation behaviors that let you create complex
animated relationships between two or more objects. These behaviors are extremely
powerful and allow complicated effects to be created with a minimum of steps.
An object with the Attracted To behavior moves toward a single specified target, the
object of attraction. Additional parameters allow you to adjust the area of influence that
defines how close an object needs to be to move toward the object of attraction, and
how strongly it is attracted.
Shape object of
attraction
Shape object with
Attracted To behavior
Animation path
The Drag parameter lets you define whether attracted objects overshoot and bounce
about the attracting object, or whether they eventually slow down and stop at the position
of the target object.
You can apply two or more Attracted To behaviors to a single object, each with a different
object of attraction, to create tug-of-war situations where the object bounces among all
the objects it’s attracted to.
497 Chapter 9 Using Behaviors