Hide Table of Contents

Create Equation-driven Curve (VB.NET)

This example shows how to create and modify an equation-driven curve.

' Preconditions:  Open a part document.
' Postconditions:
' 1. A 2D sketch is created, and an equation spline of a
'    sine curve is created.
' 2. After the break point, the curve is edited,
'    a cosine curve is created, and the number of points in the
'    spline is reduced.
Imports SolidWorks.Interop.sldworks
Imports SolidWorks.Interop.swconst
Imports System.Runtime.InteropServices
Imports System
Imports System.Diagnostics

Partial Class SolidWorksMacro

Dim swModel As ModelDoc2
Dim swExt As ModelDocExtension
Dim swSelMgr As SelectionMgr
Dim boolstatus As Boolean
    Dim y As String
    Dim r1 As Double
    Dim r2 As Double
    Dim rad As Boolean
    Dim ang As Double
    Dim xOff As Double, yOff As Double
    Dim LockStart As Boolean, LockEnd As Boolean

    Sub main()

        swModel = swApp.ActiveDoc
        swExt = swModel.Extension
        swSelMgr = swModel.SelectionManager

        boolstatus = swExt.SelectByID2(
"Front Plane", "PLANE", 0, 0, 0, False, 0, Nothing, 0)

Dim skSegment As SketchSegment
        skSegment = swModel.SketchManager.CreateEquationSpline2(
"", "sin(x)", "", "0", "6.28", False, 0, 0, 0, True, True)


        Dim skSpline As SketchSpline
        skSpline = skSegment
Call skSpline.GetEquationParameters(y, r1, r2, rad, ang, xOff, yOff, LockStart, LockEnd)

"y: " & y)
"range start: " & r1)
"range end: " & r2)
"radian?: " & rad)
"ang offset: " & ang)
"x offset: " & xOff)
"y offset: " & yOff)
"lock start: " & LockStart)
"lock end: " & LockEnd)

' Change spline to a cosine curve
        y = "cos(x)"
        Call skSpline.SetEquationParameters(y, r1, r2, rad, ang, xOff, yOff, LockStart, LockEnd)

' Reduce the number of points in the spline


End Sub

Public swApp As SldWorks

End Class


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:   Create Equation-driven Curve Example (VB.NET)

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) 2014 SP05

The search functionality within the web help is in a beta test phase and you may experience periodic delays or interruptions in its performance. These are the normal and ordinary features of a beta test and shall not under any circumstances give rise to any liability on the part of Dassault Systèmes SolidWorks Corporation or its licensors. The topics within the Web-based help are not beta topics; they document API Help (English only) 2014 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.