A Link constraint is used to animate an objec
linking from one target object to another. The Link constraint causes an object to inherit the position, rotation, and scale of its target object. An example of using a link constraint is to pass a ball from one hand to another. Assume that at frame 0 the ball is in the right hand. The hands are animated to meet at frame 50, where the ball is passed to the left hand, and then spread apart until frame 100. Procedures Example: To assign a Link constraint: In the Top viewport, create a sphere and a box. Select the sphere. Open the Motion panel. Expand > Assign Controller rollout. Select the Transform: Position/Rotation/Scale controller. Click Assign Controller. Choose Link Constraint. It is recommended that you add a Link To World before linking to any target objects. This will allow you to animate the object on its own, before the first link to a target object takes place. You can also assign Link Constraints through the Animation > Constraints submenu. To access the Link constraint’s parameters through the Motion panel: Select the Link-constrained object. Choose Motion panel > Link Params rollout.