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Apple Motion 2 User Manual

Page 371

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Chapter 5

Using Behaviors

371

Invert Axis: A checkbox that flips the orientation with which the object aligns itself to
the motion.

Spring Tension: A slider that adjusts how quickly the object’s rotation changes to
match a change in the object’s direction. Lower values create a delay between a
change to an object’s position and its subsequent change in rotation. Higher values
create more responsive changes in rotation.

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.

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 object, 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.

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.

Object of attraction

Object with

Attracted To

behavior

Animation path

01112.book Page 371 Sunday, March 13, 2005 10:36 PM