InsertControlPoint

Toolbar	Menu
Point Edit	Edit Control Points > Insert Control Point

Toolbar

Toolbar: Point Edit

Point Edit

Edit

Control Points >

Insert Control Point

The InsertControlPoint command adds control points in a curve or a row of control points on a surface.

Steps

Select a curve or surface.
Pick a location for the control point or control point row.
Inserting control points affects the shape of the curve or surface. The InsertKnot command does not change the curve or surface shape.
Press Enter to complete the command.

Command-line options
Direction (Surfaces only)	Specify the u, v, or both directions.
Toggle (Surfaces only)	Toggles the direction between u and v.
Extend	Extends the surface by half the distance from the end of the surface to the next control points.
Midpoint	Places the control point mid-way between two control points.

RemoveControlPoint

Toolbar	Menu
Point Edit	Edit Control Points > Remove Control Point

Toolbar

Toolbar: Point Edit

Point Edit

Edit

Control Points >

Remove Control Point

The RemoveControlPoint command removes control points from a curve or a row of control points from a surface.

Steps

Select a curve or surface.
Move the cursor until control points highlight and click.
Press Enter to complete the command.

Notes

Removing control points affects the shape of the curve or surface.
You can also select an existing control points and press Delete.

InsertEditPoint

Toolbar	Menu
Organic	Edit Control Points > Insert Edit Point

Toolbar

Toolbar: Organic

Organic

Edit

Control Points >

Insert Edit Point

The InsertEditPoint command adds edit points to a curve.

Steps

Select a curve.
The edit points are displayed on the selected curve.
Pick a location on the curve.

Command-line options
SubCrv	Type subcrv to select part of a curve as input.

InsertKink

Toolbar	Menu
Point Edit	Edit Control Points > Insert Kink

Toolbar

Toolbar: Point Edit

Point Edit

Edit

Control Points >

Insert Kink

The InsertKink command adds kinks to a curve or surface.

Steps

Select the curve or surface.
Pick locations where you want to insert a kink.
Press Enter to end the command.
A curve is split into multiple joined curves.

Command-line options
SubCrv	Type subcrv to select part of a curve as input.

InsertKnot

Toolbar	Menu
Point Edit Organic	Edit Control Points > Insert Knot

Toolbar

Toolbar: Organic | Point Edit

Point Edit
Organic

Edit

Control Points >

Insert Knot

The InsertKnot command adds knots in curves or surfaces.

Steps

Select the object.
Pick a location for the knot.

Note

Inserting a knot in a surface also displays an isoparametric curves at the knot location if isoparametric curves are being displayed.
The status bar distance pane displays the parameter value when inserting a knot to a curve. You can also type a parameter value to add a new knot.

Command-line options
Automatic	Adds a knot/knot line halfway between existing knots to maintain as uniform a structure as possible. Increases the knot density of a curve or surface to add more control points while maintaining an even knot distribution for better point pulling behavior.
Midpoints	Places markers half-way between the existing knots/knot lines that can act as guides for inserting knots midway between existing knots.
Symmetrical	Adds knots on both sides of the center of the curve or surface.
Undo	Reverses the last action.
Direction (Surfaces only)	Specify the u, v, or both directions.
Toggle (Surfaces only)	Toggles the direction between u and v.
SubCrv	Type subcrv to select part of a curve as input.

RemoveKnot

Toolbar	Menu
Organic Point Edit	Edit Control Points > Remove Knot

Toolbar

Toolbar: Organic | Point Edit

Organic
Point Edit

Edit

Control Points >

Remove Knot

The RemoveKnot command deletes a knot from a curve or surface.

Steps

Select a curve or surface.
Click the knot to remove and press Enter.

The RemoveKnot command can be used to remove the connecting joint between two joined curves. The resulting curve will not Explode into separate parts.

Command-line options
Direction (Surfaces only)	Specify the u, v, or both directions.
Toggle (Surfaces only)	Toggles the direction between u and v.
Undo	Reverses the last action.
SubCrv	Type subcrv to select part of a curve as input.

RemoveMultiKnot

Toolbar	Menu
Curve Tools Surface Tools	Not on menus.

Toolbar

Toolbar: Surface Tools

Curve Tools
Surface Tools

Not on menus.

The RemoveMultiKnot command removes multiple but not fully-multiple knots from curves and surfaces.

Notes

Multiple knots means more than one knot at a location. Fully-multiple knots means as many as possible at a location, which is equal to the degree.
There may be a kink at that point that is desired. Surfaces created with the Sweep2, BlendSrf, and OffsetSrf commands can be built with multiple knots.
The Simple Sweep option in the Sweep2 dialog box makes surfaces that do not have multiple knots, but this option is only available in restricted cases where all the curves are perfectly matched and correctly placed. The usual behavior of the Sweep2 command allows accurate sweeps to be made from diverse input.
The RemoveMultiKnot command removes these stacked knots if they are not fully multiple. Removing the multiple knots can cause some loss in the surface precision, but in practice, this is usually not a problem.
The advantage to removing these knots is that the surface point count is reduced.

InsertControlPoint

Steps

RemoveControlPoint

Steps

Notes

InsertEditPoint

Steps

InsertKink

Steps

InsertKnot

Steps

Note

RemoveKnot

Steps

RemoveMultiKnot

Notes

See also

See also