9

Editing Curve Sub-Objects 1139
Reverse—
Reverses the order of the CV s or points
in a curve, so that the first vertex becomes the last,
and the last becomes the first.
The first point or CV is significant w hen you use
the N URBS curve like a spline: as a loft (page
1–352) path or shape, as a path constraint (page
2–398) path, or as a motion trajectory (page
2–301). For these purposes, the first vertex of the
cur ve is significant. If the cur ve is a closed curve,
you can use Make First to set the curve’s first
vertex.
The direction of the curve also determines the
initial direction of normals on surfaces based on
this curve.
Mak e COS—This button is enabled only for the
following kinds of curves:
• U iso c ur ves (page 1–1168)
• V iso curves (page 1–1168)
• Normal projected curves (page 1–1169)
• Vector projected curves (page 1–1171)
• Surface-surface intersection curves (page
1–1166)
• Surface edge cur ves (page 1–1177)
• CV curves on surfaces (page 1–1172)
• Point curves on sur faces (page 1–1175)
This displays a Make Curve on Surface dialog
(page 1–1226), which tur ns the selected curve
into a CV or point curve on surface. Once
converted, you can edit the new curve on
surfaceusingthecurveonsurfacecontrols,
including the Edit Curve on Surface dialog (page
1–1229).
Ifthecurveisalreadyacurveonsurface,this
button lets you change it from a point to CV
curveonsurface,orviceversa.
The new Curve on Surface preserves the
trimming of the original curve.
Co nvert C urve—Click to display the Convert Curve
dialog (page 1–1225).Thisdialogprovidesamore
generalwaytoconvertaCVcurvetoapointcurve,
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 rn in g : When you make a curve independent, you
lose the animation controllers for all objec ts that depend
on it in turn. If you mak e a curve that trims 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-objec t
from the NURBS model, making it a new top-level
NURBS cur ve (page 1–1106) object. The Detach
dialog (page 1–1228) is displayed, wh ich lets you
name the new curve. The new object is no longer
part of the orig inal NURBS model.
To create a new top-level NURBS curve that is a
copyoftheselectedcurve,turnonCopybefore
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
position that becomes the first vertex of the curve.
The first point or CV is significant when you us e
theNURBScurvelikeaspline:asaloft (page
1–352) path or shape, as a path constraint (page
2–398) path, or as a motion trajectory (page
2–301). For these purposes, t he first vertex of the
curve is significant. If the curve is a closed curve,
you can use Make First to set the curve’s first
vertex.
Break—Breaks a single curve into two curves.
Click in a v iewpor t to choose the location to break
the curve.