Graphics Programs Reference
In-Depth Information
our previous example) is as apt to swing the
child item in the chain
up
as it is
down
.
While this is good for things like whips and
chains, it's not so pleasant for things like
elbows and knees.
If you need a child item to favor bending
in one direction over another, it is best to
set up the IK chain so that it is “pre-bent”
in the direction you want the item to favor.
“Standard” IK Hazards
Good, old-fashioned IK is a nifty and
time-saving tool, but it's not perfect. Here
are some things to bear in mind when
working with IK.
Pre-bending
An IK chain that has two (or more) joints
laid out in a straight line (as was the case in
Figure 16-14
Figure 16-15
