Flash
is the mother of all animation software. Flash offers some pretty
neat features to help animators make better animation. One of these
features is the "Bone Tool". With Bone Tool, animators can insert
virtual bones in their drawings and rotate these bones to rotate the
drawing that they are bound to. This tool is perfect for animating
characters with legs and arms but it can also be used to animate various
other things. In this tutorial I will show you how to use the bone
tool.
Let's begin by creating a new ActionScript 3.0 document in
Flash. I use the rectangle tool to create a simple rectangle on the
stage.

Now
select the bone icon from the tools or press the keyboard shortcut "M"
to access the bone tool. You will see your cursor change to a bone icon.
Now click and drag on your drawing to create a bone. I click on one end
of the rectangle and drag to the middle to create a bone.

To create additional bones, click on a pivot point in a bone and drag to some other point in the drawing.

I have created another bone from middle of the rectangle to its other end.

Now
to move the bones, press "V" to access the cursor then click on any
pivot point in the drawing and click and drag the pivot to move the
whole bone. I have clicked on the right most pivot in my drawing and
dragged it downwards to get the following shape.

In
order to fully leverage the power of the bone tool, you have to learn
to animate using this tool. Flash has made animating with the bone tool
as easy as you can imagine. Notice the timeline after creating the bone
structure. You will see an armature layer. This layer is used to animate
using the bones.

To
animate using the armature layer, press F6 on any other frame in the
timeline to create a new frame and move the bones to a new place. The
frames in between will be automatically animated.


You
can press ctrl+ENTER to test the move and see the motion in action.
Using the same method, you can use as many frames on the armature layer
as you want, the frames in between will be animated automatically and
the end result would be a smooth animation with natural motion.
After
a little practice you will become an expert using bones. Just keep your
eyes open and look for potential places in your animation where using
bones would help you.