8

CV Curve 1115
segmentsareputinthesamesmoothinggroupif
the angle between them is less than the threshold
angle.
Threshold—Specifies the threshold angle in
degrees. Any two adjacent spline seg ments are put
inthesamesmoothinggroupiftheanglebetween
them is less than the threshold angle.
A curve and the same curve rendered with thick ness
Keyboard Entry rollout
The Keyboard Entry rollout lets you create a
NURBS curve by typing. Use the TAB key to move
betweenthecontrolsinthisrollout. Toclicka
button from the keyboard, press ENTER while the
button is active.
X, Y, and Z—Let you enter the coordinates of the
next CV to add.
Add Point—Adds the CV to the curve.
Weigh t—EnteraweightfortheCV.
Clo se—Ends creation of the curve and creates a
segment between the last CV and the init ial CV, to
make the curve a closed curve.
Fin is h —Ends creation of the curve, leaving it open
ended.
Create CV Cur ve rollout
This rollout contains the controls for curve
approximation.
Interpola t io n group
The controls in this grou p box change the accuracy
andkindof
curve approximation (page 1–1240)
used to generate and display the curve.
Draw In Al l Vi ewports—Lets you u se any viewp ort
whileyouaredrawingthecurve.Thisisoneway
to create a 3D curve. When off, you must finish
drawing the curve in the view port where you
began it. Default=On.
WhileDrawInAllViewportsison,youcanalso
use
snaps (page 2–38) in any view p ort.
Automatic Re p aram eterization group
The controls in this group box let you specify
automatic reparameterization. They are simi lar to
the controls in the
Reparameterize dialog (page
1–1238)
, with one addition: all choices except
for None tell the software to reparameterize the
curve autom atically; that i s, whenever you edit it
by moving CVs, refining, and so on.
None—Do not reparameterize automatically.