Tool Palettes Curve Edit > Rebuild curve > Rebuild Curve option window

Curve Edit > Rebuild curve

Recreates a curve with the same shape but different mathematical properties.

See Simplify objects

See Convert rational to non-rational geometry

See Automatically add spans to a curve with high curvature

See Convert a curve to uniform parameterization

See Create a free curve from existing geometry

See Match the edit point locations of objects

Rebuild Curve option window

> Rebuild Type

Curvature

Increase curve definition by inserting edit points in segments with high curvature.

Reduce Spans

Simplify the curve by removing extraneous edit points.

Del Multi Knots

Remove multi-knots from the curve.

Uniform Knots

Convert the curve to uniform parameterization.

Match Knots

Convert the curve to match the parameterization and degree of another curve.

These settings appear when Rebuild Type is Curvature.

> Curvature settings

Tolerance

The amount of deviation from the original curve permitted during the rebuild (in current linear units).

A low number matches the original more exactly, and inserts more points. A high number does not match the original as well, and inserts fewer points.

Max Spans Type

Absolute: the maximum number of spans in the new curve is equal to Max Spans.

Relative: the maximum number of spans in the new curve is equal to the current number of spans times the Max Spans Factor.

This option appears when Max Spans Type is Absolute.

Max Spans

Specify the maximum number of spans allowed in the new curve, when Max Spans Type is Absolute.

This option appears when Max Spans Type is Relative.

Max Spans Factor

Specify a multiplicative factor. When Max Spans Type is Relative, the maximum number of spans allowed in the new curve is the current number of spans times this factor.

Change Degree

On: Change the degree of the curve as it is rebuilt. A slider appears allowing you to set the degree of the rebuilt curve. Curves on surface, trim curves, and isoparametric curves can only be rebuilt as degree 1 or 3.

Off: Do not change the curve degree.

These settings appear when Rebuild Type is Reduce Spans.

> Reduce Spans settings

Tolerance

The amount of deviation from the original curve permitted during the rebuild (in current linear units).

A low number matches the original more exactly, but does not simplify the curve as much. A high number does not match the original as well, but simplifies more.

These settings appear when Rebuild Type is Uniform Knots.

> Uniform Knots settings

Change Number of CVs

On: Change the number of CVs (and hence of spans) in the rebuilt curve. A slider appears allowing you to set the number of spans.

Off: The number of CVs in the rebuilt curve is equal to the number of CVs in the original.

Change Degree

On: Change the degree of the curve as it is rebuilt. A slider appears allowing you to set the degree of the rebuilt curve. Curves on surface, trim curves, and isoparametric curves can only be rebuilt as degree 1 or 3.

Off: Do not change the curve degree.

> Control Options

Smoothing

After rebuilding, automatically switch to the Smooth tool to allow you to smooth the resulting curve.

Interactive

Specify an arbitrary surface isoparametric curve to rebuild, rather than a visible one.

MixMax Display

Automatically create a Min-Max deviation comb between the original and rebuilt curves.

Auto Recalc.

Automatically update the new curve when the values in the Rebuild Curve window change.

Keep Originals

Keep the original curve after creating the rebuilt curve.

> Buttons

Recalc

When Auto Recalc. is turned off, use this button to update the rebuilt curve with the current values.

Undo

Undo all the changes made by the Rebuild curve tool and return to the original curve.

Next

Finish rebuilding the current curve and prompt for a new curve to rebuild.