Namespace: Autodesk.Revit.DB Class: CurveUV

CurveUV.ComputeDerivatives

Method

Description:
Computes the first derivative, the second derivative and the unit tangent vector at the specified parameter along the curve.

Syntax

public IList<UV> ComputeDerivatives(
	double parameter,
	bool normalized
)

Public Function ComputeDerivatives ( 
	parameter As Double,
	normalized As Boolean
) As IList(Of UV)

public:
IList<UV^>^ ComputeDerivatives(
	double parameter, 
	bool normalized
)

member ComputeDerivatives : 
        parameter : float * 
        normalized : bool -> IList<UV>

Parameters

Parameter	Type	Description
parameter	Double	The specified parameter along the curve.
normalized	Boolean	If false, parameter is interpreted as natural parameterization of the curve. If true, param is expected to be in [0,1] interval mapped to the bounds of the curve. Setting to true is valid only if the curve is bound.

Return Value

Type	Description
IList	The array containing three members: the first derivative (at index [0]), the second derivative (at index [1]) and the unit tangent vector (at index [2]).

Exceptions

Exception	Condition
ArgumentException	The given value for parameter is not finite
ArgumentOutOfRangeException	The curve cannot be evaluated as normalized because it is unbound. -or- The parameter is not a valid value for normalized evaluation.