Adobe Flash CS4 Professional for Windows and Macintosh: Visual QuickStart Guide

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Intro to

Inverse Kinematics

13

Inverse kinematics (IK) is a method of

animating objects and shapes that relies

on a structure—called an armature. An IK

armature works something like a skeleton,

with multiple linked segments called bones.

Once you set up the structure, you can

manipulate it to create various con gura-

tions, or poses. Imagine manipulating a

human skeleton; if you raise the hand and

bring it in toward the torso, the forearm also

raises, and the elbow bends. Similarly, if you

move one bone in an IK armature, connected

bones move in response. Flash interpolates

changes between poses to create animation.

While the process of creating ...