Hide Table of Contents

Create Equation-driven Curve Example (VB.NET)

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

' Preconditions:
' 1. Open a new part document.
' 2. Open the Immediate window.
' Postconditions:
' 1. Creates a 2D sketch and creates an equation-driven spline of
'    a sine curve.
' 2. Examine the graphics area, then Press F5.
' 3. Edits the curve and creates a cosine curve.
' 4. Reduces the number of points in the spline.
' 5. Examine the Immediate window and graphics area.

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)

' Examine graphics area, then press F5

        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)
*   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) 2016 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.