ABSTRACT
This idea can be applied to human movement as well. A child turning cartwheels is similar to a pinwheel, and a child on a swing is similar to a pendulum. Complex movements might require using more than one registration point. The primary registration point follows the primary line of action, and secondary points follow secondary lines of action. A human
walking is an example of a complex movement; in this case, the animator might pick the center of the pelvis as the main registration point. Secondary registration points might be a knee joint for the bending of the leg and an ankle joint for the bending of the foot (Figure 6-2).
