Reparameterize Dialog (NURBS)

Command entry:

Modify panel

Select a NURBS object.

Modifier stack display

Curve sub-object level

Select an independent CV curve sub-object.

CV Curve rollout

Reparam. button

Command entry:

Modify panel

Select a NURBS object.

Modifier stack display

Curve sub-object level

Select an independent CV surface sub-object.

CV Surface rollout

Reparam. button

The Reparam. button for CV curves and surfaces displays this dialog. Reparameterizing a CV sub-object changes its parameter space to provide a better relation between control point locations and the shape of the sub-object.

TipIt is a good idea to reparameterize after you have added CVs to a curve or surface by refining or inserting.

Interface

Chord Length: Chooses the chord-length algorithm for reparameterization.

Chord-length reparameterization spaces knots (in parameter space) based on the square root of the length of each curve segment.

Chord-length reparameterization is usually the best choice.
Uniform: Spaces the knots uniformly.

A uniform knot vector has the advantage that the curve or surface changes only locally when you edit it. With chord-length parameterization, moving any CV can potentially change the entire sub-object.
Maintain Parameterization: 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.
Preview: If on (the default), displays the effects of reparameterizing in viewports.