8

Multisided Blend Surface 1215
sub-object level. To finish editing the curve, click
to turn off Edit Curves.
Tip: When you edit curves in a 2-rail sweep, turning
off display of the sweep itself can make the curves
easier to see and improve per formance as well. Use
CTRL+D (while the
Keyboard Shortcut Override
Togg le (page 3–912)
is on) to toggle display of
dependent sub-objects, including sweeps.
Thesweepsurfacecandeviatefromthecurve
if you edit a curve in a sweep by increasing the
weight of the curve CVs. You can work around
this by refining the curve at the point where the
surface deviates.
Multisided B lend S ur face
SelectNURBSobject.>Modifypanel>CreateSurfaces
rollout > Dependent Surfaces group box > N Blend
Select NU RB S object. > Modify panel > NURBS toolbox >
Create a Multisided Blend Sur face button
Multisided blend between three other surfaces
A multisided blend surface "fills in" the edges
defined by three or four other curve or surface
sub-objects. Unlike a regular, two-sided blend
surface, the curves’ or surfaces’ edges must form a
closed loop; that is, they must completely surround
the opening that the multisided blend will cover.
Tip: If the multisided blend surface can’t be created,
fusethepointsorCVsatthecornerswherethe
surfaces meet. Sometimes snapping the corners
doesn’t work, because of round-off error.
Procedure
To create a multisided blend:
1.
Click to turn on Multisided Blend in the
toolbo x or N Blend on the
Create Surfaces
rollout.
2. In turn, click the three or four surface sides or
curves that surround the opening.
You can flip normals on the multiside d blend
while creat ing it.
3. Rig ht-click to end creation.
A new surface is created. It covers the opening.
Interf ace
Multisided Blend surfaces have no parameters
other than those on the
Surface Common rollout
(page 1–1142)
.