RhinoCommon API
Namespaces
Rhino.Geometry
Curve Class
Curve Methods
ChangeClosedCurveSeam Method
ChangeDimension Method
ClosedCurveOrientation Method
ClosestPoint Method
ClosestPoints Method
CombineShortSegments Method
Contains Method
CreateArcBlend Method
CreateArcLineArcBlend Method
CreateBlendCurve Method
CreateBooleanDifference Method
CreateBooleanIntersection Method
CreateBooleanRegions Method
CreateBooleanUnion Method
CreateControlPointCurve Method
CreateCurve2View Method
CreateFillet Method
CreateFilletCornersCurve Method
CreateFilletCurves Method
CreateInterpolatedCurve Method
CreateMatchCurve Method
CreateMeanCurve Method
CreatePeriodicCurve Method
CreateSoftEditCurve Method
CreateTextOutlines Method
CreateTweenCurves Method
CreateTweenCurvesWithMatching Method
CreateTweenCurvesWithSampling Method
CurvatureAt Method
DerivativeAt Method
Dispose Method
DivideAsContour Method
DivideByCount Method
DivideByLength Method
DivideEquidistant Method
DoDirectionsMatch Method
Duplicate Method
DuplicateCurve Method
DuplicateSegments Method
Extend Method
ExtendByArc Method
ExtendByLine Method
ExtendOnSurface Method
ExtremeParameters Method
Fair Method
FilletSurfaceToCurve Method
FilletSurfaceToRail Method
FindLocalInflection Method
Fit Method
FrameAt Method
GetConicSectionType Method
GetCurveParameterFromNurbsFormParameter Method
GetDistancesBetweenCurves Method
GetFilletPoints Method
GetLength Method
GetLocalPerpPoint Method
GetLocalTangentPoint Method
GetNextDiscontinuity Method
GetNurbsFormParameterFromCurveParameter Method
GetPerpendicularFrames Method
HasNurbsForm Method
InflectionPoints Method
IsArc Method
IsCircle Method
IsClosable Method
IsContinuous Method
IsEllipse Method
IsInPlane Method
IsLinear Method
IsPlanar Method
IsPolyline Method
IsShort Method
JoinCurves Method
LengthParameter Method
LocalClosestPoint Method
MakeClosed Method
MakeEndsMeet Method
MaxCurvaturePoints Method
NonConstOperation Method
NormalizedLengthParameter Method
NormalizedLengthParameters Method
Offset Method
OffsetNormalToSurface Method
OffsetOnSurface Method
OffsetTangentToSurface Method
PerpendicularFrameAt Method
PlanarClosedCurveRelationship Method
PlanarCurveCollision Method
PointAt Method
PointAtLength Method
PointAtNormalizedLength Method
ProjectToBrep Method
ProjectToMesh Method
ProjectToPlane Method
PullToBrepFace Method
PullToMesh Method
Rebuild Method
RemoveShortSegments Method
Reverse Method
RibbonOffset Method
SetEndPoint Method
SetStartPoint Method
Simplify Method
SimplifyEnd Method
Smooth Method
SpanDomain Method
Split Method
TangentAt Method
ToArcsAndLines Method
ToNurbsCurve Method
ToPolyline Method
TorsionAt Method
Trim Method
TryGetArc Method
TryGetCircle Method
TryGetEllipse Method
TryGetPlane Method
TryGetPolyline Method
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CurveTorsionAt Method

Evaluate the torsion of a curve at a parameter. Sometimes also called the "second curvature", torsion is the rate of change of a curve's osculating plane.

Namespace:  Rhino.Geometry
Assembly:  RhinoCommon (in RhinoCommon.dll)
Since: 7.10
Syntax
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public double TorsionAt(
	double t
)

Parameters

t
Type: SystemDouble
The evaluation parameter.

Return Value

Type: Double
The torsion if successful.
Remarks
See Barrett O'Neill, Elementary Differential Geometry, page 69.
See Also