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