Create Curve Through Reference Points Example (C#)

This example shows how to create a curve through reference points.

//----------------------------------------------------------------------------
// Preconditions:
// 1. Verify that the specified model document exists.
// 2. Open an Immediate window.
//
// Postconditions:
// 1. Opens the part document.
// 2. Selects four reference points.
// 3. Creates Curve1 through the selected points.
// 4. Inspect the FeatureManager design tree, the graphics area, and the
//    Immediate window.
//
// NOTE: Because the model is used elsewhere, do not save changes.
// ---------------------------------------------------------------------------
 
using SolidWorks.Interop.sldworks;
using Microsoft.VisualBasic;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Diagnostics;
using SolidWorks.Interop.swconst;
using System.Runtime.InteropServices;
 
namespace InsertCurveThroughPoints_CSharp.csproj
{
    partial class SolidWorksMacro
    {
 
        ModelDoc2 Part;
        Feature feat;
        ReferencePointCurveFeatureData featData;
        SelectionMgr selMgr;
        bool boolstatus;
        int longstatus;
        int longwarnings;
 
        public void Main()
        {
            Part = swApp.OpenDoc6("C:\\Program Files\\SOLIDWORKS Corp\\SOLIDWORKS\\samples\\tutorial\\api\\block20.sldprt", 1, 0, "", ref longstatus, ref longwarnings);
            swApp.ActivateDoc2("block20", false, ref longstatus);
            Part = (ModelDoc2)swApp.ActiveDoc;
            selMgr = (SelectionMgr)Part.SelectionManager;
 
            boolstatus = Part.Extension.SelectByID2("", "VERTEX", 0.0646002912861796, 0, 0.0493456023787655, false, 1, null, 0);
            boolstatus = Part.Extension.SelectByID2("", "VERTEX", 0.0646002912861796, 0.039624, 0.0493456023787655, true, 1, null, 0);
            boolstatus = Part.Extension.SelectByID2("", "VERTEX", -0.0624778997860176, 0.039624, 0.0493456023787655, true, 1, null, 0);
            boolstatus = Part.Extension.SelectByID2("", "VERTEX", -0.0624778997860176, 0, 0.0493456023787655, true, 1, null, 0);
 
            Part.Insert3DSplineCurve(false);
            Part.ClearSelection2(true);
            boolstatus = Part.Extension.SelectByID2("Curve1", "REFERENCECURVES", 0, 0, 0, false, 0, null, 0);
            feat = (Feature)selMgr.GetSelectedObject6(1, -1);
            featData = (ReferencePointCurveFeatureData)feat.GetDefinition();
 
            featData.AccessSelections(Part, null);
            Debug.Print(feat.Name);
            Debug.Print("  Closed curve? " + featData.ClosedCurve);
            Debug.Print("  Number of through points: " + featData.GetThroughPointCount());
 
            featData.ReleaseSelectionAccess();
 
        }
 
 
        /// <summary>
        /// The SldWorks swApp variable is pre-assigned for you.
        /// </summary>
 
        public SldWorks swApp;
 
    }
}