Adobe Flash Professional CS6 Adobe Flash Professional CS6 Classroom In A Book | Page 154

2 Click the Minus button and select Alpha to delete the property from the
Motion Editor.
Choose Edit > Undo (Ctrl-Z/Cmd-Z) to restore the Alpha property because
you’ll be working with it in the next section.
Easing
Easing refers to the way in which a motion tween proceeds. In the most basic sense,
it can be thought of as acceleration or deceleration. An object that moves from one
side of the Stage to the other side can start off slowly, then build up momentum,
and then stop suddenly. Or, the object can start off quickly, and then gradually
come to a halt. But easing can also be more complicated. It can describe motion
that oscillates, bounces, and does other complex patterns. Your keyframes still indi-
cate the beginning and end points of the motion, but the easing determines how
your object gets from one keyframe to the next.
Easing is best visualized in the Motion Editor. The graphs that connect one key-
frame to another are usually straight lines, which indicate that the change from
one value to the next value proceeds linearly. However, if you want a more gradual
change from the starting position (known as an ease-in), the line would be curved
near the beginning keyframe, indicating a slower start. A gradual slowdown
(known as an ease-out) would be represented by a curve near the ending keyframe.
Adobe FLAsh ProFessionAL Cs6 CLAssroom in A book
145