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Create Equation-driven Curve Example (C#)

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.
//----------------------------------------------------------------
using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
namespace SimplifySketchSpline_CSharp.csproj
{
    
partial class SolidWorksMacro
    {

        
ModelDoc2 swModel;
        
ModelDocExtension swExt;
        
SelectionMgr swSelMgr;
        
bool boolstatus;
        
string y;
        
double r1;
        
double r2;
        
bool rad;
        
double ang;
        
double xOff;
        
double yOff;
        
bool LockStart;
        
bool LockEnd;

        
public void Main()
        {
            swModel = (
ModelDoc2)swApp.ActiveDoc;
            swExt = swModel.Extension;
            swSelMgr = (
SelectionMgr)swModel.SelectionManager;

            boolstatus = swExt.SelectByID2(
"Front Plane", "PLANE", 0, 0, 0, false, 0, null, 0);
            swModel.SketchManager.InsertSketch(
true);
            swModel.ClearSelection2(
true);

            
SketchSegment skSegment = default(SketchSegment);
            skSegment = (
SketchSegment)swModel.SketchManager.CreateEquationSpline2("", "sin(x)", "", "0", "6.28", false, 0, 0, 0, true,
            
true);
            swModel.ViewZoomtofit2();

            System.Diagnostics.
Debugger.Break();
           
//Examine the graphics area, then press F5

            
SketchSpline skSpline = default(SketchSpline);
            skSpline = (
SketchSpline)skSegment;
            skSpline.GetEquationParameters(
out y, out r1, out r2, out rad, out ang, out xOff, out yOff, out LockStart, out LockEnd);

            
Debug.Print("y: " + y);
            
Debug.Print("range start: " + r1);
            
Debug.Print("range end: " + r2);
            
Debug.Print("radian?: " + rad);
            
Debug.Print("ang offset: " + ang);
            
Debug.Print("x offset: " + xOff);
            
Debug.Print("y offset: " + yOff);
            
Debug.Print("lock start: " + LockStart);
            
Debug.Print("lock end: " + LockEnd);

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

            
// Reduce the number of points in the spline
            skSpline.Simplify(0.0);

            swModel.SketchManager.InsertSketch(
true);

        }



        
public SldWorks swApp;

    }
}



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