Curve Methods

The following methods are available for creating, querying or manipulating curve and polycurve objects. A polycurve is a curve that is represented by a sequence of contiguous curve segments. Generally, polycurves are created by using the Join command.

Method	Description
AddArc	Adds an arc curve.
AddArc3Pt	Add a 3 point arc curve.
AddArcPtTanPt	Adds an arc curve, created from a start point, a start direction, and an end point, to the document.
AddBlendCurve	Creates a curve blend between two curves.
AddCircle	Adds a circle curve.
AddCircle3Pt	Adds a 3 point circle curve.
AddCirclePtTanPt	Adds a circle curve, created from two points and a start direction, to the document.
AddCircleTanTan	Adds a circle curve that is tangent to 2 curves to the document.
AddCircleTanTanTan	Adds a circle curve that is tangent to 3 curves to the document.
AddCurve	Adds a control points curve.
AddEllipse	Adds an elliptical curve.
AddEllipse3Pt	Adds a 3 point elliptical curve.
AddFilletCurve	Adds a fillet between two curve objects.
AddInterpCrvOnSrf	Adds an interpolated curve on a surface.
AddInterpCrvOnSrfUV	Adds an interpolated curve on a surface using surface uv coordinates.
AddInterpCurve	Adds an interpolated curve.
AddInterpCurveEx	Adds an interpolated curve similar to the InterpCrv command.
AddLine	Add a line curve.
AddNurbsCurve	Adds a NURBS curve.
AddPolygon	Adds a regular polygon to the document.
AddPolyline	Adds a polyline curve.
AddSpiral	Adds a spiral or helical curve object to the document.
AddSpiral2	Adds a spiral or helical curve object to the document.
AddStarPolygon	Adds a regular star polygon to the document.
AddSubCrv	Adds a new curve based on a portion of an existing curve.
AddTextOutlines	Adds outline curves created from a text string to the document.
ArcAngle	Return the angle of an arc curve.
ArcCenterPoint	Returns the center point of an arc curve.
ArcMidPoint	Returns the mid point of an arc curve.
ArcRadius	Returns the radius of an arc curve.
ChangeCurveDegree	Changes the degree of a curve object.
CircleCenterPoint	Returns the center point of an circle curve.
CircleCircumference	Returns the circumference of a circle curve.
CircleRadius	Returns the radius of a circle curve.
CleanUpPolyCurve	Cleans up a poly curve.
CloseCurve	Closes an open curve object.
ClosedCurveOrientation	Returns the orientation of a closed, planar curve.
ConvertCurveToBezier	Changes the structure of a NURBS curve to a Bézier curve.
ConvertCurveToPolyline	Converts a curve to a polyline curve.
CurveArcLengthPoint	Returns an arc length point on a curve.
CurveArea	Returns the area of a closed planar curve.
CurveAreaCentroid	Returns the area centroid of a closed planar curve.
CurveArrows	Enables or disabled a curve object's annotation arrows.
CurveBooleanDifference	Differences two closed planar curves.
CurveBooleanIntersection	Intersects two closed, planar curves.
CurveBooleanUnion	Unions two or more closed planar curves.
CurveBrepIntersect	Calculate the intersection of a curve object and a brep object.
CurveClosestObject	Returns the locations on two objects where they are closest to each other.
CurveClosestPoint	Returns the parameter of the point on a curve that is closest to a test point.
CurveContourPoints	Returns the points generated by contouring a curve object.
CurveCurvature	Returns the curvature of a curve at a parameter.
CurveCurveIntersection	Calculates the intersection of two curve objects.
CurveDegree	Returns the degree of a curve.
CurveDeviation	Returns the deviation between two curves.
CurveDim	Returns the dimension of a curve.
CurveDirectionsMatch	Compares the direction of two curve objects.
CurveDiscontinuity	Tests a curve object for derivatitive, tangent, or curvature discontinuity.
CurveDomain	Returns the domain of a curve.
CurveEditPoints	Returns the edit points of a curve.
CurveEndPoint	Returns the end point of a curve.
CurveEvaluate	General purpose curve evaluator.
CurveExtremePoints	Returns the point locations of all local extrema.
CurveFilletCorners	Rounds the corners of kinked curves with arcs of a single specified radius.
CurveFilletPoints	Returns points at which to cut a pair of curves so that a fillet fits.
CurveFrame	Returns a plane at a parameter.
CurveKnotCount	Returns the knot count of a curve.
CurveKnots	Returns the knots of a curve.
CurveLength	Returns the length of a curve.
CurveMidPoint	Returns the mid point of a curve object.
CurveNormal	Returns the normal direction of a planar curve object.
CurveNormalizedParameter	Converts a normalized curve parameter to a curve parameter.
CurveParameter	Converts a curve parameter to a normalized curve parameter.
CurvePerpFrame	Returns a perpendicular plane at a parameter.
CurvePerpPoint	Finds the location on a curve that is perpendicular to a test point.
CurvePlane	Returns the plane in which a planar curve lies.
CurvePointCount	Returns the control points count of a curve.
CurvePoints	Returns the control points of a curve.
CurveRadius	Returns the radius of curvature at a point on a curve.
CurveRailFrames	Returns planar rail sweep frames at specified points on a curve.
CurveSeam	Adjusts the seam point of a closed curve.
CurveStartPoint	Returns the starting point of a curve.
CurveSurfaceIntersection	Calculates the intersection of a curve object with a surface object.
CurveTangent	Returns the tangent to a curve at a parameter.
CurveTangentPoint	Finds the location on a curve that is tangent to a test point.
CurveWeights	Returns the weight values assigned to control points of a curve.
DivideCurve	Divides a curve into segments.
DivideCurveEquidistant	Divides a curve such that the linear distance between the points is equal.
DivideCurveLength	Divides a curve into segments of a specified length.
EllipseCenterPoint	Returns the center point of an ellipse curve.
EllipseFocalDistance	Returns the distance from the center of an ellipse to a focus.
EllipseFoci	Returns the foci of an ellipse.
EllipseQuadPoints	Returns the quadrant points of an ellipse curve.
EvaluateCurve	Evaluates a curve point at a parameter.
ExplodeCurves	Explodes one or more curve objects.
ExtendCurve	Extends a curve object until it intersects other objects.
ExtendCurveLength	Extends a curve object for a specified distance.
ExtendCurvePoint	Extends a curve to an end point.
ExtractPolyCurveSegment	Extracts a segment curve from a polycurve object.
FairCurve	Fairs a curve object.
FilletCurves	Adds a tangent arc between two curves and trims or extends the curves to the arc.
FitCurve	Fits a new curve through an existing curve.
InsertCurveKnot	Inserts a knot into a curve object.
IsArc	Verifies an object is an arc curve.
IsCircle	Verifies an object is an circle curve.
IsCurve	Verifies an object is a curve.
IsCurveClosable	Verifies an open curve object is closable.
IsCurveClosed	Verifies an object is a closed curve.
IsCurveConicSection	Tests a curve to see if it is a conic section.
IsCurveInPlane	Test a curve to see if it lies in a specific plane.
IsCurveLinear	Verifies an object is a linear curve.
IsCurvePeriodic	Verifies an object is a periodic curve.
IsCurvePlanar	Verifies an object is a planar curve.
IsCurveRational	Verifies an object is a rational NURBS curve.
IsEllipse	Verifies an object is an ellipse curve.
IsEllipticalArc	Verifies an object is an elliptical-shaped arc curve object.
IsLine	Verifies an object is a line curve.
IsNurbsCurve	Verifies an object is a NURBS curve object.
IsPointOnCurve	Verifies a point is on a curve.
IsPolyCurve	Verifies a curve is a polycurve.
IsPolyline	Verifies an object is a polyline curve.
JoinCurves	Joins two or more curve objects.
LineFitFromPoints	Fits a line through an array of points.
MakeCurveNonPeriodic	Makes a periodic curve non-periodic.
MakeCurvePeriodic	Makes a curve object periodic.
MeanCurve	Creates a mean curve from two curves.
MeshPolyline	Creates a polygon mesh from a closed polyline.
OffsetCurve	Offsets a curve.
OffsetCurveNormal	Offsets a curve normal to a surface.
OffsetCurveOnSurface	Offsets a curve on a surface.
PlanarClosedCurveContainment	Determines the relationship between the regions bounded by two coplanar simple closed curves.
PlanarCurveCollision	Determines if two coplanar curves intersect.
PointInPlanarClosedCurve	Determines if a point is inside of a closed curve, on a closed curve, or outside of a closed curve.
PolyCurveCount	Returns the number of curve segments represented by a polycurve.
PolylineVertices	Returns the vertices of a polyline curve.
ProjectCurveToMesh	Projects one or more curves onto one or more meshes.
ProjectCurveToSurface	Projects one or more curves onto one or more surfaces or polysurfaces.
RebuildCurve	Rebuilds a curve to given point count.
RemoveCurveKnot	Removes a knot from a curve.
RemoveShortCurveSegments	Remove short segments from a curve object.
ReverseCurve	Reverses the direction of a curve object.
SimplifyCurve	Simplifies a curve object.
SmoothCurve	Smooths a curve object.
SoftEditCurve	Soft edits a curve object.
SplitCurve	Splits a curve.
TrimCurve	Trims a curve.
TweenCurve	Creates curves between two open or closed input curves.