2009

HD Joint Settings
You control a joint's resistance to motion, and its tendency to return to its
original position, by setting Ease, Damping, and Spring Back options.
Moving telescopes with and without damping
Easing a Joint at Its Limits
An organic joint, or a worn mechanical joint, moves freely in the middle of
its range of motion but moves less freely at the extremes of its range. Use Ease
to cause a joint to resist motion as it approaches its From and To limits.
For example, your forearm might move freely in the middle of its range of
motion, but it resists movement when you try to squeeze it against your upper
arm or extend it all the way out. Ease simulates this effect.
Damping Joint Action
As a joint corrodes, dries out, or is put under a heavy load, it resists motion
along its active axes. Damping simulates the natural effect of joint friction or
inertia. Enter a value greater than zero in the Damping field to apply resistance
over a joint's full range of motion.
As damping increases a joint resists motion and other joints are required to
move more. A damping value of 1.0 means there is extreme resistance and a
joint will not move on that axis.
3432 | Chapter 15 Animation