9

Reparameterize D ialog 1237
Inter face
Number in U—Sets the number of CV columns.
Number in V —Sets the number of CV rows.
Reparameterize Dialog
Modify panel > Select NURBS object. > Stack display >
Curve sub-object level > Select an independent CV curve
sub-object. > CV Curve rollout > Reparam. button
Modify panel > Select NU RBS object. > Stack display
> Curve sub-object level > Select an independent CV
surface sub-object. > CV Sur face rollout > Reparam.
button
The Reparam. button for CV curves and surfaces
displays this dialog. Reparameterizing a CV
sub-object changes its parameter space (page
3–988) to provide a better relation between control
point locations and the shape of the sub-object.
Tip: It is a good idea to reparameterize after you
have added CVs to a curve or surface by refining
or inserting.
Inter face
Chord L e n g t h —Cho o ses the chord-length
algorithm for reparameterization.
Chord-length reparameterization spaces knots (in
parameter space (page 3–988)) based on the square
rootofthelengthofeachcurvesegment.
Chord-length reparameterization is usually the
best choice.
Unifor m—Spaces the knots uniformly.
A uniform knot vector has the advantage t hat
the curve or surface changes only locally when
you e dit it. With chord-length parameter ization,
moving any CV can potentially change the entire
sub-object.
Maintain Parameteriza tion—When on, the curve is
automatically reparameterized as you edit it, using
the currently active method of reparameterization.
When off, no reparameterization happens unless
you use this dialog. Default=off.
Prev iew—Ifon(thedefault),displaystheeffectsof
reparameterizing in viewports.
Sub-Object Clone Options Dialog
Modify panel > Select NURBS surface or cu rve sub-object.
>
Shift +Clone. > Clone Options dialog
When you Shift +Clone (page 1–478) asurface
orcurvesub-object,theCloneOptionsdialog
appears. This dialog asks whether you want the
clone to be a relational copy, an independent copy,
or a transform.