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Editing Curve CV Sub-Objects 1131
towardtheCV.Decreasingtheweightrelaxesthe
cur ve away from the CV.
Increasingweightisawaytohardenacurve;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 creat ion rollouts. The weight
of CVs in geometry that you convert to NURBS
can vary, depending on the object’s origi nal shape.
You can change the weight when multiple CVs are
selected. Using the Weight field or spinner whi le
multiple CVs are selected assigns all of them the
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.
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 curves. It is also a way to change the
shape of curves.
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.
ThecurvecanbecomesharperinthefusedCVs’
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.
Refine—RefinesthecurvebyaddingCVs.
Wa rni ng: When you add CVs with Refine, you lose the
animation controllers for all CVs on the curve.
AsyoumovethemouseovertheCVcurve,a
preview of the CVs that will be added, and their
locations, is displayed in blue.
Tip: It is a good idea to reparameterize after you
have added CVs to a curve by refining. See
Editing
Curve Sub-Objects (page 1–1136)
.
Delete—Deletes the selected CVs.
Insert—Inserts CVs into the curve. Click Insert
andthenclickthecurvewhereyouwanttoinsert
the new CV. Inserting CVs is similar to refining
with CVs, except that other CVs in the curve do
not move. This means that the shape of the curve
changes when you insert.
Inserting CVs does not remove animation from
thecurve,asrefiningdoes.
Tip: It is a good idea to reparameterize after you
have added CVs to a curve by inserting. See
Editing Cur ve Sub-Objects (page 1–1136) .
Ex tend—Extends a CV curve. Drag from the end
of a curve to add a new CV and extend the curve.
Wa rni ng: When you add points with Extend, you lose
the animation controllers for a ll points on the curve.
Remove Animation—
Removes animation
controllers from the selected CVs.
Display Lattice—When on, displays the control
lattice (page 3–1017)
that surrounds CV curves.
When off, the control lattice isn’t shown in
view por ts. Default=on.
CV s Sel ected—ThistextfieldshowshowmanyCVs
are currently selected.