aim vector
 
 
 

In animation, the direction a constrained object must point toward so that it points at the target point.

The aim vector starts at the constrained object’s pivot point, and is defined relative to the object’s local space. By itself, the aim vector does not completely constrain the object, because it does not control the orientation of the object (determined by the up vector and the world up vector).

See also up vector, vector.