Graphics Programs Reference
In-Depth Information
Figure 16-29
Figure 16-30
Note
and predictably through many productions.
It's always best to learn the rules well
before you start seeing what happens by
breaking them.
•
IK is only dependable when solving
rotations for a maximum of
two items
within
an IK chain.
•
On any item controlled by IK, let IK
solve for a maximum of two axes.
•
In a chain of two items, the child item
should only use IK to solve for one of its
axes.
•
Always give your two-item IK chain a
little “suggestion” in knowing which direc-
tion it should bend by pre-bending those
items.
I find that if I'm having problems with flip-
ping, I'm usually trying to put the character
into a pose that my
own
joints would com-
plain about.
If you find you absolutely, positively have
to have a particular, “painful” pose, you can
save a lot of time by making a “special-pur-
pose” rigging that can more easily move
through that pose.
“Standard” IK Rules
These
rules
are more like
guidelines
. They
can be bent and broken as you see fit to suit
the needs of your particular IK setup.
However, that being said, these rules
have kept my characters moving smoothly
