Edit curves
Curves can be edited by changing their control-point structure.
Turn curve points on
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PointsOn
Display curve and surface control points.
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PointsOff
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EditPtOn
Displays edit points on curves or SubDs.
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SolidPtOn
Turn on pseudo control points for polysurfaces.
Insert or remove control points
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InsertControlPoint
Add control points to a curve or a row of control points to a surface.
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InsertEditPoint
Add edit points to a curve.
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InsertKink
Add kinks to a curve.
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InsertKnot
Add knots to curves or surfaces.
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RemoveKnot
Delete specified knots from a curve or surface.
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RemoveMultiKnot
Remove multiple knots from curves and surfaces.
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MakePeriodic
Remove the kink from the start/end of a curve or surface.
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MakeNonPeriodic
Insert a kink at the start/end of a curve or surface.
Change control point structure
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ChangeDegree
Change the degree of the polynomial that defines the curve or surface by adding or subtracting control points between knot spans, while maintaining the knot structure.
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Convert
Change a curve to polyline or arc segments.
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ConvertToBeziers
Change the structure of a NURBS object to a Bézier object.
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CrvSeam
Change the seam (start/end) location on closed curves.
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Fair
Remove large curvature variations in a curve while limiting the geometry changes to the specified tolerance.
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FitCrv
Make a non-rational NURBS curve of a specified degree that matches the input curve to within the specified tolerance.
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MakeNonPeriodic
Insert a kink at the start/end of a curve or surface.
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MakePeriodic
Remove the kink from the start/end of a curve or surface.
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MakeUniform
Make the object knot vectors uniform without changing the control point locations.
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MakeUniformUV
Make the surface knots uniform in u or v direction.
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Rebuild
Reconstruct curves, surfaces, and extrusion objects to a specified degree and control point number.
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RebuildCrvNonUniform
Interactively modify selected curves by non-uniformly re-spacing the control points.
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RemoveMultiKnot
Remove multiple knots from curves and surfaces.
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Reparameterize
Recalculate an object's parameter space to match its 3-D geometry.
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SimplifyCrv
Replace each curve segment that has the geometry of a line or an arc with a true line or arc.
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Smooth
Average the positions of curve and surface control points and mesh vertices and evens out the spacing to remove unwanted detail and loops.
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Weight
Edit the weight of a curve or surface control point.
Interactive editing
These commands allow interactive curve editing.
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FixedLengthCrvEdit
Drag points on a curve to change its shape without changing the curve's length.
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ExtractSubCrv
Separate or duplicate polycurve segments.
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HBar
Edit a curve or surface with Bézier curve editing handles.
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InsertControlPoint
Add control points to a curve or a row of control points to a surface.
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InsertEditPoint
Add edit points to a curve.
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InsertKink
Add kinks to a curve.
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InsertKnot
Add knots to curves or surfaces.
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InsertLineIntoCrv
Flatten the curve segment between picked points.
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Match
Change a curve end to meet another curve or surface edge with a specified continuity.
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MatchCrvDir
Change a curve's direction to match another curve's direction.
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MoveUVN
Move curve or surface control points along the u, v, and normal directions of the object.
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RebuildCrvNonUniform
Interactively modify selected curves by non-uniformly re-spacing the control points.
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RemoveKnot
Delete specified knots from a curve or surface.
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SetPt
Moves selected points and control points of objects to a specified location in the x, y, and/or z directions.
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SoftEditCrv
Move the surrounding curve area smoothly relative to the distance.
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SubCrv
Shorten a curve to the new picked endpoints and select.
Curve analysis
These commands gather information about the structure of a curve.
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CrvDeviation
Report the maximum and minimum distances between two curves.
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CrvEnd
Place a point object at the end of a curve.
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CrvSeam
Change the seam (start/end) location on closed curves.
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CrvStart
Place a point object at the start of a curve.
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Curvature
Evaluate the curvature of a curve or surface.
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CurvatureGraph
Evaluate curve or surface curvature with a graph.
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Dir
Display and edit an object's normal direction.
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Domain
Report the domain of a curve or surface.
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EditPtOn
Displays edit points on curves or SubDs.
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ExtractPt
Duplicate curve control or edit points, surface control points, and mesh vertices.
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GCon
Report the geometric continuity between two curves.
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Radius
Report the radius of a curve.