8

Orientation Constraint 391
is on, the length of each target-specific line is
determined by its target’s Weig ht setting and
theViewlineLengthvalue. IfViewlineLength
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.
Viewli ne Length Abs olute—When on, the software
uses only the Viewline Leng th setting for the length
ofthemainviewline;thedistancebetweenthe
constrained object and the target(s) has no effect.
Set Orientation—Lets you define the offset
orientation of the constrained object manually.
When on, you can use the Rotation tool to set the
constrained object’s orientation. This orientation
is then maintained as the constrained object looks
at its target.
Reset Orientation—Sets the orientation of the
constrained object back to the default. This
is useful if you want to reset the constrained
object’s orientation after having set the orientation
manually.
Select Look At Axis—Usetodefinetheaxisthat
looks at the t arget. The X,Y,Z check boxes reflect
the constrained object’s local coordinate system.
The Flip check box reverses the directions of the
local axes.
Select Upnode—ThedefaultUpnodeistheWorld.
Turn off World to manually select an object that
defines the Upnode plane. This plane is drawn
from the constrained object to the Upnode object.
If the LookAt Axis and the Upnode axis coincide,
the constrained object wi ll flip. Animating the
positionoftheupnodeobjectwillmovethe
upnode plane.
Upnode Control group:
Lets you quickly flip between LookAt Upnode
Control and Axis Alignment.
Look At—When selected the Upnode matches the
LookAt target.
Axis Alignment—When this is selected the Upnode
Aligns to the object axis. Choose which axis (X,
Y or Z) in the Source Upnode Alig nment group
directly below Upnode Control.
Source/Upnode Alignment group
Sour ce Axis—Chooses the constrained object’s
axis that is to be aligned to the U pnode Axis. The
Source Axis reflects the constrained object’s Local
Axis. The Source Axis and LookAt Axis work
together therefore the Axis used to define the
LookAt Axis will be unavailable.
Aligned to Upnode Axis—Chooses the Upnode axis
that the selected Source Axis aligns to. Note t hat
theselectedSourceaxismayormaynotbeableto
completely align to the Upnode Axis.
Orientation Constraint
Animation menu > Constraints > Orientation Constraint
Orientation constraints align the awning vanes to the
supporting rod.