2009

Once you assign a LookAt constraint, you can access its properties on the
LookAt Constraint rollout on the Motion panel. On this rollout, you can add
or delete targets, assign weighting, assign and animate target weight values,
and adjust other related parameters.
NOTE When you assign a LookAt constraint via the Animation menu, 3ds Max
assigns a Rotation List controller to your object. In the list on the Rotation List
rollout, you will find LookAt Constraint, which is the constraint you assigned. To
view the LookAt Constraint rollout, double-click the LookAt Constraint entry in
the list.
Add LookAt Target Use to add new targets that influence the constrained
object.
Delete LookAt Target Use to remove target objects that influence the
constrained object.
Weight Use to assign and animate weight values for each target. Available
only when multiple targets are used.
Keep Initial Offset Maintains the constrained object’s original orientation as
an offset to its constrained orientation.
Viewline Length Defines the length of the main viewline drawn from the
pivot of the constrained object to the pivot of its target (or the average, in
case of multiple targets). A negative value draws the line from the constrained
object in the opposite direction of the target or targets.
With a single target, the length of the viewline is determined by the distance
between the constrained object and the target, as well as the Viewline Length
setting. However, if Viewline Length Absolute is on, the distance between the
two has no effect on the length.
The color of the viewline is defined by the Target Line element in the Gizmos
category of the
Colors panel on page 7712 in the Customize > Customize User
Interface dialog
on page 7697.
NOTE When multiple targets are assigned, additional viewlines drawn from the
constrained object to each target object inherit the color of the respective targets.
If Viewline Length Absolute is on, the length of each target-specific line is
determined by its target's Weight setting and the Viewline Length value. If Viewline
Length Absolute is off, the length of each line is determined by the distance
between the constrained object and the respective target, as well as the Viewline
Length value. An additional (main) viewline, whose length and color are determined
as specified above, indicates the actual, calculated orientation.
LookAt Constraint | 3317