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CurveDerivativeAt Method (Double, Int32, CurveEvaluationSide)
Evaluate the derivatives at the specified curve parameter.

Namespace: Rhino.Geometry
Assembly: RhinoCommon (in RhinoCommon.dll) Version: 5.1.50000.0 (5.0.20693.0)
Syntax
public Vector3d[] DerivativeAt(
	double t,
	int derivativeCount,
	CurveEvaluationSide side
)

Parameters

t
Type: SystemDouble
Curve parameter to evaluate.
derivativeCount
Type: SystemInt32
Number of derivatives to evaluate, must be at least 0.
side
Type: Rhino.GeometryCurveEvaluationSide
Side of parameter to evaluate. If the parameter is at a kink, it makes a big difference whether the evaluation is from below or above.

Return Value

Type: Vector3d
An array of vectors that represents all the derivatives starting at zero.
See Also