2009

orthogonal to the axis of rotation. The possible check box combinations
are: XOX XXO OXX OXO OOX XOO
7 3 Moves + 1 Rotate: Turn on three Moves plus one Rotate. (This is a
universal joint without the sliding.) It's typical of automotive applications
where the rear axle is located with the trailing drive shaft. This is an
uncommon application.
8 * 1 Move (complementary) + 2 Rotates: Turn on one Move that's
complementary to two Rotates. (This is like a hockey puck on ice.) The
joint can slide anywhere on a plane, but cannot fall or tip, and it cannot
leave the surface of the plane. The possible check box combinations are:
XOO OXO OOX OXX XOX XXO
9 2 Moves (one complementary) + 2 Rotates: Turn on two Moves, one of
which is complementary to one of the two Rotates that are selected. (This
is like a hockey puck with a nail through it, and the nail is sliding along
a groove in the ice.) It's free to travel in one direction, and to rotate about
an orthogonal axis. One possible check box combination is: XXO XOX
10 * 2 Moves + 2 Rotates (matching): Turn on two Moves and two matching
Rotates. This results in a sliding axle (a shaft that can both slide in and
out of a hole, and rotate with the hole). The clear Move and Rotate axis
specifies the axis along which the joint can slide and rotate. The possible
check box combinations are: XXO XOX OXX XXO XOX OXX
11 * 2 Moves + 3 Rotates: Turn on two Moves and all three Rotates. (This is
a prismatic or sliding joint.) The joint transmits no torque, and force in
only one direction. You can use this in conjunction with the Push effect
to make a hydraulic cylinder. The one clear Move specifies the axis of
movement.
12 * 3 Moves + 2 Rotates: Turn on all three Moves, and any two Rotates.
This is an axle (the most common type of joint.) The one clear Rotate
specifies the axis of rotation.
13 All Locked: All six check boxes are on. This is a completely rigid joint.
Interface
Dynamics rollout
Contains all of the surface dynamics controls.
3860 | Chapter 15 Animation