This section demonstrates how to build bones into hierarchical structures that
enable both forms of kinematics.
Setting Child Bones
Adding a child bone to an existing bone starts out much like duplicating the parent bone:
The new child bone inherits its parent??™s size, position, and rest length. Setting up that first
bone is the hardest part. Once it is in place, you can set child bones.And because they will
be ???children??? of the base bone, their scale will match the penguin better when added,
unlike the first bone.
Exercise 12.3 Creating Child Bones
1. This first bone you??™ve created in the previous exercise will begin the hierarchy of
the penguin body, meaning that it is the parent bone. Each bone that extends
from this one is a child bone. If the parent bone moves, the children move with it.
Make sure the Body bone is selected, and on the Setup menu tab in Layout, click
Child Bone in the Add category. Note that you can also use the = key. Name this
new bone Neck.
Note
2. You can see that an exact duplicate of the Body bone is attached right above it.
Change this new bone??™s Rest Length setting to about 600mm so that its tip meets
the base of the head area, as in Figure 12.
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