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1 The Bone tool can connect movie clip instances together to form an articulated object
that can be posed and animated with inverse kinematics. The Bone tool can also
create an armature wtihin a shape, which can be posed and animated with inverse
kinematics as well.
2 The Bind tool can redefine the connections between the control points of a shape and
the bones of an armature. The connections between the control points and the bones
determine how the shape reacts to the bending and rotations of the armature.
3 Bones are the objects that connect individual movie clips together or that make up
the internal structure of a shape for motion with inverse kinematics. A node is one
of the movie clip instances that have been linked with the Bone tool. A node can be
described in terms of its relationship with other nodes, such as parent, child, or sibling.
Joints are the articulations between bones. Joints can rotate as well as translate (slide
in both the x and y directions). Armatures refer to the complete articulated object.
Armatures are separated on a special Pose layer on the Timeline where poses can be
inserted for animation.
4 A shape tween creates smooth transitions between keyframes containing different
shapes. To apply a shape tween, create different shapes in an initial keyframe and in a
final keyframe. Then select any frame between the keyframes in the Timeline, right-
click/Ctrl-click, and select Create Shape Tween.
5 Shape hints are labeled markers that indicate how one point on the initial shape of
a shape tween will map to a corresponding point on the final shape. Shape hints
help refine the way the shapes will morph. To use shape hints, first select the initial
keyframe of a shape tween. Choose Modify > Shape > Add Shape Hint. Move the first
shape hint to the edge of the shape. Move the playhead to the final keyframe, and move
the corresponding shape hint to a matching edge of the shape.
6 Strength is the amount of springiness of any individual bone in an armature. Add
springiness with the Spring feature to simulate the way different parts of a flexible
object jiggle when the entire object moves and continue to jiggle when the object
stops. Damping refers to how quickly the springiness effect subsides over time.
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