2009

Position constraints align the elements of the robot assembly.
A position constraint causes an object to follow the position of an object or
the weighted average position of several objects.
In order to activate, a position constraint requires an object and a target object.
Once assigned the object becomes constrained to the target object’s position.
Animating the target’s position causes the constrained object to follow.
Each target has a weight value defining its influence. A value of 0 is equal to
off. Any value greater than 0 will cause the target to influence the constrained
object. Weight values can be animated to create effects such as a ball being
picked up from a table.
Multiple Targets and Weighting
A constrained object can be influenced by several target objects. When using
multiple targets, each target has a weight value that defines the degree by
which it influences the constrained object, relative to other targets.
Using Weight is meaningful (and available) only with multiple targets. A value
of 0 means the target has no influence. Any value greater than 0 causes the
target to influence the constrained object relative to other targets' Weight
3304 | Chapter 15 Animation