Tweening
Tweening is a timeline edit
that automatically generates partial steps of animation between
the DIFFERENCE of the symbols in the opening and closing keyframes
on the timeline. The word tween is short for between. When studios
such as Disney create animations, key frame artists would
create the begriming and ending frames for an animation sequence
and the production artists would create the "tweens".
To tween keyframe elements they must first be converted
to library symbols AND they must be the same symbol.
You cannot tween to different symbols.
To tween the changes in properties of instances, groups,
and type that has been converted to a library symbol,
you use motion tweening. Flash can tween position, size,
rotation, and skew of instances, groups, and type. Additionally,
Flash can tween the color of instances and type, creating
gradual color shifts or making an instance fade in or
out. To tween the color of groups or type, you must
make them into symbols.
If you change the number of frames between the two
keyframes, or move the group or symbol in either keyframe,
Flash automatically tweens the frames again.
You can create a motion tween using one of two methods:
- Create the starting and ending
keyframes for the animation and
use the Motion Tweening option in
the Frame Properties panel.
- Create the first keyframe for
the animation, and then choose INSERT
/ CREATE MOTION TWEEN and move the
object to the new location on the
Stage. Flash automatically creates
the ending keyframe.
When tweening position, you can
make the object move along a nonlinear
path with a MOTION GUIDE.
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