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.