Hide Table of Contents
IEvaluate2 Method (ICurve)

Evaluates the curve at the specified parameter of the curve.

.NET Syntax

Visual Basic (Declaration) 
Function IEvaluate2( _
   ByVal Parameter As Double, _
   ByVal NumberOfDerivatives As Integer _
) As Double
Visual Basic (Usage) 
Dim instance As ICurve
Dim Parameter As Double
Dim NumberOfDerivatives As Integer
Dim value As Double
value = instance.IEvaluate2(Parameter, NumberOfDerivatives)
double IEvaluate2( 
   double Parameter,
   int NumberOfDerivatives
double IEvaluate2( 
&   double Parameter,
&   int NumberOfDerivatives



Curve parameter


Number of derivatives

Return Value

Array of doubles (see Remarks)


To determine a valid parameter range, use ICurve::GetEndParams or IEdge::GetCurveParams2.

The format of the return value is an array of (NumberOfDerivatives + 1) * 3 doubles:

[evaluated point], [evaluated derivative 1],...[evaluated derivative NumberOfDerivatives]

In pseudo mathematical notation, this could be written as:

    P(t)  P(t)/dt  P(t)/dtdt ..........

 In terms of the number of derivatives that can be returned for a curve type, you could write:


Curve type

Maximum number of derivatives



Intersection curve


Constant parameter line

Determined by underlying surface




Any number


where the curve type is from ICurve::Identity.

For a curve of type swCurveTypes_e::TRIMMED_TYPE, the number of derivatives is determined by the base curve as obtained from ICurve::GetBaseCurve.


See Also


SolidWorks 2007 SP5, Revision Number 15.5

Provide feedback on this topic

SOLIDWORKS welcomes your feedback concerning the presentation, accuracy, and thoroughness of the documentation. Use the form below to send your comments and suggestions about this topic directly to our documentation team. The documentation team cannot answer technical support questions. Click here for information about technical support.

* Required

Subject:   Feedback on Help Topics
Page:   IEvaluate2 Method (ICurve)
*   I acknowledge I have read and I hereby accept the privacy policy under which my Personal Data will be used by Dassault Systèmes

Print Topic

Select the scope of content to print:


We have detected you are using a browser version older than Internet Explorer 7. For optimized display, we suggest upgrading your browser to Internet Explorer 7 or newer.

 Never show this message again

Web Help Content Version: API Help (English only) 2012 SP05

To disable Web help from within SOLIDWORKS and use local help instead, click Help > Use SOLIDWORKS Web Help.

To report problems encountered with the Web help interface and search, contact your local support representative. To provide feedback on individual help topics, use the “Feedback on this topic” link on the individual topic page.