9

Editing Surface CV Sub-Objects 1133
Single CV —
(The default.) When on, you can select
individual CVs by clicking, or groups of CVs by
dragging a region.
Row of CVs—Whenon,clickingaCVselectsthe
entire row the CV belongs to. Dragging selects all
rows in the region.
Co lumn of CVs—When on, clicking a CV selects the
entire column the CV belongs to. Dragging selects
all columns in the region.
Row and Column of CVs—When on, clicking a CV
selects both the row and column the CV belongs
to. Dragging selects all rows and columns in the
region.
All CVs—When on, clicking or dragging selects all
the CVs in the surface.
Name—Showseither"NoCVsselected","Multiple
CVs selected", or "SurfaceName(uIndex,vIndex)",
where "SurfaceName" is the name of the CV’s
parent surface, and "uIndex,vIndex" is the CV’s
UV location on the surface. You can’t edit the
Name field to c ustomize the nam es of CVs.
If CVs are fused, the Name field shows the name
of the first CV.
Weigh t—Adjusts the weight of the selected CVs.
Yo u c a n u s e a C V ’ s weight to adjust the CV’s effect
on the surface. Increasing t he weight pulls the
surface tow ard the CV. Decreasing the weight
relaxes the surface away from the CV.
Increasingweightisawaytohardenasurface:that
is, to sharpen its curvature at a particular location.
By default, the weight is 1.0 for the CVs of NURBS
objects that you create on the Create panel or the
NURBS sub-object creation rollouts. The weight
of CVs in geometry that you convert to NURBS
can vary, depending on the object’s original shape.
You can change the weight when multiple CVs are
selected. Using the Weight field or spinner while
multiple CVs are selected assig ns a ll of them the
value you choose. Because weights are relative to
each other (rational), using the Weight control
when all CVs are selected has no visible effect.
Tip: You can increase the curvature of an
indentation in a surface by increasing the weight
of the CVs surrounding the indented area. This is
easier and often more effective than moving the
indented area’s CVs.
Hide—Click to hide the currently selected CVs.
Unhide A ll—Click to unhide all hidden CVs.
Fuse—Fuses a CV to another CV. (You can ’t fuse a
CV to a point, or vice versa.) This is one way to
connecttwosurfaces.Itisalsoawaytochangethe
shape of surfaces.
Fusing CVs does not combine the two CV
sub-objects. They are connected but remain
distinct sub-objects that you can unfuse later.
Fused CVs behave as a single CV until you unfuse
them. Fused CVs behave similar to a single point,
but the property of multiplicity for coincident CVs
also applie s. (See NURBS Concepts (page 1–1091)
and CV Curve (page 1–1110).) The fused CV s have
proportionally more influence on the curve, which
can b ecome shar p er in the fused CVs’ vicinit y,
or even angular if more than two CVs are fused
together.
Fused CVs are displayed in a distinct color. The
default is purple. (You can change this color u s ing
the Colors panel (page 3–799) of the Customize
User Interface dialog (page 3–792).)
Unfuse—Unfuses the fused CVs.
Remove Animation—Removes animation
controllers f rom the selec ted CVs.
Constrained M otion group
These buttons constrain CV motion. They are
enabled when you select one or more CVs. When