The
Aventures
of
Andre
and
Wally
B.
and
Luxo
Jr.
were
both
animated
using
a
keyframe
animation
system
called
Md
(Motion
Doctor).
[19]
Luxo
Jr.
was
animated
using
this
layered
approach
to
the
keyfranles.
Jr.'s
hop
(figure
1)
was
animated
by
first
setting
the
keyframes
for
his
forward
movement
only:
two
keyframes
were
set
for
the
X
translation,
the
first
where
the
hop
starts
and
the
second
where
he
lands.
This
defined
the
timing
of
his
hop.
The
height
of
his
hop
was
then
defined
by
setting
a
keyframe
in
the
Z
translation
(Z
being
up
in
this
case).
The
next
step,
animating the rotation of Jr.'s arms, was important because the arms define the anticipation,
squash and stretch, and follow through of the action.
Keyframes were set for just about every frame, rotating the arms together before the hop for the anticipation, then immediately far apart for the stretch of the jump. The arms were rotated together again at the top of the arc where the action slows slightly, then rotated far apart, stretching to anticipate the landing. To indicate the shock of the landing, the arms were rotated quickly together two frames after the base lands on the floor. This is the follow through of the action. His base and shade were animated in the next two steps. Like the arms, many keyframes were set to define the rotation of the base and shade because their movement was important for nticipation and follow through.