Graphics Reference
In-Depth Information
may also be brought about by the less dynamic movement of secondary
action. Tertiary action is usually associated with the appendages of a figure
such as hair, mane, or tail. Because these appendages do not have the ability
to generate movement of their own volition, tertiary action very seldom
occurs in limbs or parts of the anatomy that are capable of independent
movement.
Think about the different flowing actions of the mane and tail of a horse as it
walks, canters, trots, or gallops. The mane and tail will stream out behind the
horse to varying degrees as a direct result of the movement generated by the
animal's running action. Now consider the action of the long, floppy ears of a
dog as it runs. The ears may be animated with a very vigorous action, moving
upward and downward because they are attached to the dog's head, but the
dog's head is demonstrating secondary action. The head moves the way it
does because the entire animal is being driven by the primary action of the
FIG 3.7
a: The tertiary action is
evident in the movement of the
garments worn by this running girl.
b: The movement of the hair is tertiary
action.
(a)
(b)
