8

1198 Chapter 9: Sur face Modeling
Closed U lofts
Automatic Cur ve Att achment
When you create a U loft, you can select curves
that are not already sub-objects of the active
NURBS model. You can select another curve or
spline (page 1–261) object in the scene. When you
select that curve, it is automatically attached to the
current object as if you had used the Attach button.
Wa rni ng: If the curve you attach is a sub-object of
anotherNURBSmodel,theentiremodel(thatis,the
curve’sparentNURBSobject)isattachedaswell.
Asyoumovethemouseoveracurvethatisnot
part of the active NURBS object, the cursor
changes shape to indicate you can pick the curve,
but the curve is not highlighted in blue.
Pr ocedur es
To create a U lof t surfa ce:
1.
In a NURBS object that contains at least
two curves, tu
rn on U Loft.
2. Click the firs
tcurve.
3. Click addition
al curves in succession.
The U loft is created. It is "stretched" across the
curves you click. The order in which you click
thecurvescanaffecttheshapeoftheUloft
surface.Thenamesofthecurvesappearinthe
U Loft Surface creation rollout.
While creating a U loft, you can press
BACKSPACEtoremovethelastcurveyou
clicked from the list of U loft curves.
The Flip Normals control lets you flip the
surface normals at creation time. (After
creation, you can flip normals using controls on
the Surface Common rollout.)
4. Rig ht-click to end U loft creation.