Apple Motion 2 - Manual (Page 379)

Chapter 5 Using Behaviors 379
Dashboard control
The Dashboard has controls for Bounce Strength and Active Edges. 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 objects within the layer are affected
by the behavior together, as if they were a single object.
Bounce Strength: The speed at which objects travel after colliding with an edge. A
value of 0 causes objects to come to a complete stop when colliding with an edge
that’s perpendicular to the direction of motion. Higher values cause an object to move
faster after bouncing. This only slows the object in the direction perpendicular to the
bounced edge.
Active Edges: Four checkboxes define which Canvas edges are detected by the Edge
Collision behavior. You can turn on and off edges in any combination.
Gravity
This behavior causes an object to fall over time. The gravitational acceleration can be
increased or decreased, resulting in a change to the rate of fall. Objects affected by the
Gravity behavior continue to fall past the bottom edge of the Canvas (unless the Edge
Collision behavior has been applied).
The Gravity behavior can be used in conjunction with other behaviors that animate the
position of objects to create natural-looking arcs and animation paths that simulate
thrown objects falling to the ground. For example, apply the Throw behavior to an
object to send it flying through the air, and then apply the Gravity behavior to it to
make the object arc up and then fall down past the bottom of the Canvas.
Animation path of an object
pulled down by the Gravity
behavior
01112.book Page 379 Sunday, March 13, 2005 10:36 PM