8

Editing Surface CV Sub-Objects 1135
value you choose. Because weig hts are relative to
each other (rational), using the Weight control
when all CVs are selected has no v isible effect.
Tip: You can increase the curvature of an
indentationinasurfacebyincreasingtheweight
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 All —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
connect two surfaces. It is also a way to change the
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 applies. (See
NURBS C oncepts (page 1–1093)
and CV Curve (page 1–1112) .) The fused CVs
have proportionally more influence on the curve,
which can become sharper in the fused CVs’
vicinity, or even angular if more than two CVs are
fused together.
Fused C Vs are displayed in a distinct color. The
default is purple. (You can change this color using
the
Colors panel (page 3–843) of the Customize
User Interface dialog (page 3–836)
.)
Unfuse—Unfuses the fused CVs.
Remove Animation—Removes animation
controllers from the selected CVs.
Constrained Motion group
These buttons constrain CV motion. They are
enabled when you select one or more CVs. When
you finish dragging the CV selection, the active
constraint button turns off.
U—Constrains the CV selection to move in the
surface’s U dimension.
Keyboard shortcut (Keyboard Shortcut Overr ide
Togglemustbeon):ALT+U
V—Constrains the CV selection to move in the
surface’s V dimension.
Keyboard shortcut (Keyboard Shortcut Overr ide
Togglemustbeon):ALT+V
Nor mal—Constrains the CV selection to move
normal to the original surface.
Keyboard shortcut (Keyboard Shortcut Overr ide
Togglemustbeon):ALT+N
Delete group
These buttons delete CVs from the surface. Select
one or more CVs, and then click Row, Col., or
Both.
You can’t delete surface CVs if the deletion would
givethesurfacefewerthanfourrowsorfewer
than four columns. Aside from that restriction,
these buttons delete
all ro ws, columns, or rows and
colum ns that conta in selected CVs. This means
that you can’t delete after you make a selection
using the Ro w and Column or All selection
buttons: that would imply deleting the entire CV
surface.
These buttons are unavailable unless the deletion
is possible.
Wa rni ng: When you delete CVs, you lose the animation
controllers for all CVs on the surface.
Row—
DeletesrowsofCVsfromthesurface.
Co l.—Deletes columns of CVs from the surface.
Both—DeletesbothrowsandcolumnsofCVs
from the surface.