8
Editing Curve Sub-Objects 1141
Co nvert Curve—
Click to display the
Convert Curve
dialog (page 1–1227)
.Thisdialogprovidesamore
general way to convert a CV curve to a point curve,
or a point curve to a CV curve. It also lets you
adjust a number of other curve parameters.
Mak e Independent—Disabled if the curve is
independent. If the curve is dependent, clicking
this button makes it independent.
Wa rni ng: When you m ake a curve independent, you
lose the animation controllers for all objec t s that depend
on it in turn . If you make a curve that tr ims a surface
independent, you lose the trimming of the surface.
Remove Animation—
Removes animation
controllers from the selected curves.
Detach—Detaches the selected curve sub-object
from the NURBS model, making it a new top-level
NURBS curve (page 1–1107)
object. The
Detach
dialog (page 1–1230)
is displayed, w hich lets you
name the new curve. The new object is no longer
part of the original NURBS model.
To create a new top-level NURBS curve that is a
copy of the selected c urve, turn on Copy before
you click Detach.
Co py—When on, clicking Detach creates a copy of
the selected curve instead of detaching it from the
NURBS model. Default=off.
Mak e First—For a closed curve, lets you choose a
positionthatbecomesthefirstvertexofthecurve.
The first point or CV is significant when you use
theNURBScurvelikeaspline:asa
loft (page
1–347)
path or shape, as a
path constraint (page
2–380)
path, or as a motion
trajectory (page
2–296)
. For these purposes, the first vertex of the
cur ve is significant. If the curve is a closed cur ve,
you can use Make First to set the curve’s first
vertex.
Break—Breaks a single curve into two curves.
Click in a v iewport to choose the location to break
the curve.
Wa rni ng: When you break a cur ve sub-object, you lose
the animation controllers for all points or CVs on the
curve.
Join—
Joins two curve sub-objects together. After
you have joined the curves in a viewport, the
Join
Curves dialog (page 1–1233)
is displayed. This
dialog lets you choose t he method for joining the
two curves.
Wa rni ng: When you join two curve sub-objects, you
lose the animation controllers for all points or CVs on
both curves.
Material ID—
LetsyouassignamaterialIDvalue
tothecurve.Ifthecurveisrenderable,material
IDs let you assign a m aterial to the cu rve using
a
Multi/Sub-Object (page 2–1403)
mater ial. In
addition, the Select by ID button lets you select a
curveormultiplecurvesbyspecifyingamaterial
ID number. Can range from 1 to 100. Default=1.
Select by ID—Displays a
Select by Material ID
(page 1–1240)
dialog.
CV Cur ve rollout
This additional rollout is displayed when a CV
curve is selected.
Degree—Setsthedegreeofthecurve.Thehigher
the degree value, the greater the continuity. The
lowerthedegree,themorediscontinuousthe
cur ve seg ments b ecome. The degree can’t be less
than one or greater than the number allowed by