ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with motion tweens
2 Select Edit > Timeline >Copy Motion as ActionScript 3.0.
After copying the script, paste it into a file and save it.
After creating a motion tween and copying and saving the script, you can reuse it as is or modify it in your own
dynamic ActionScript-based animation.
Incorporating motion tween scripts
Flash Player 9 and later, Adobe AIR 1.0 and later, requires Flash CS3 or later
The header in the ActionScript code that you copy from Flash lists all the modules required to support the motion
tween.
Motion tween classes
Flash Player 9 and later, Adobe AIR 1.0 and later, requires Flash CS3 or later
The essential motion tween classes are the AnimatorFactory, MotionBase, and Motion classes from the fl.motion
package. You could need additional classes, depending on the properties that the motion tween manipulates. For
example, if the motion tween transforms or rotates the display object, import the appropriate flash.geom classes. If
it applies filters, import the flash.filter classes. In ActionScript, a motion tween is an instance of the Motion class.
The Motion class stores a keyframe animation sequence that can be applied to a visual object. The animation data
includes position, scale, rotation, skew, color, filters, and easing.
The following ActionScript was copied from a motion tween that was created in Flash to animate a display object
whose instance name is Symbol1_2. It declares a variable for a MotionBase object named __motion_Symbol1_2. The
MotionBase class is the parent of the Motion class.
var __motion_Symbol1_2:MotionBase;
Then the script creates the Motion object:
__motion_Symbol1_2 = new Motion();
Last updated 6/6/2012
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