Get and Set Spline Handles Example (C#)

This example shows how to get and set the properties of spline handles in a 2D spline.

//----------------------------------------------------------------------------
// Preconditions:
// 1. Verify that the specified document template exists.
// 2. Open an Immediate window.
//
// Postconditions:
// 1. Creates Sketch1 in the graphics area and FeatureManager design tree.
// 2. Modifies some of the spline handles of Sketch1.
// 3. Inspect the Immediate window.
//----------------------------------------------------------------------------
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 GetSetSplineHandle_CSharp.csproj
{
    partial class SolidWorksMacro
    {
 
        ModelDoc2 swModel;
        SelectionMgr swSelMgr;
        ModelDocExtension swModelDocExt;
        SketchSpline swSpline;
        SketchSegment skSegment;
        object[] objSplineHandle;
        SplineHandle swSplineHandle;
        bool boolstatus;
 
        int i;
 
        public void Main()
        {
            swModel = (ModelDoc2)swApp.NewDocument("C:\\ProgramData\\SolidWorks\\SOLIDWORKS 2015\\templates\\Part.prtdot", 0, 0, 0);
            swModel = (ModelDoc2)swApp.ActiveDoc;
            swSelMgr = (SelectionMgr)swModel.SelectionManager;
            swModelDocExt = swModel.Extension;
 
            object pointArray = null;
            double[] points = new double[18];
            points[0] = -0.0725658847190971;
            points[1] = -0.0284590725570979;
            points[2] = 0;
            points[3] = -0.0437940929359115;
            points[4] = 0.0215374317625674;
            points[5] = 0;
            points[6] = -0.0245140262770747;
            points[7] = -0.026920232075895;
            points[8] = 0;
            points[9] = 0.0273938454967038;
            points[10] = -0.0414386885537397;
            points[11] = 0;
            points[12] = 0.0413348167730874;
            points[13] = 0.0386761654855832;
            points[14] = 0;
            points[15] = 0.101251331620574;
            points[16] = 0.0438481259864147;
            points[17] = 0;
            pointArray = points;
 
            skSegment = swModel.SketchManager.CreateSpline((pointArray));
            swModel.SketchManager.InsertSketch(true);
 
 
            boolstatus = swModelDocExt.SelectByID2("Spline1@Sketch1", "EXTSKETCHSEGMENT", 0, 0, 0, false, 0, null, 0);
            swSpline = (SketchSpline)swSelMgr.GetSelectedObject6(1, 0);
 
 
            // Get the handles on the spline
            objSplineHandle = (object[])swSpline.GetSplineHandles();
 
 
            for (i = 0; i <= objSplineHandle.GetUpperBound(0); i++)
            {
                swSplineHandle = (SplineHandle)objSplineHandle[i];
                Debug.Print("Spline handle " + swSplineHandle.SplinePointNumber);
                Debug.Print(" X: " + swSplineHandle.X * 1000);
                Debug.Print(" Y: " + swSplineHandle.Y * 1000);
                Debug.Print(" Z: " + swSplineHandle.Z * 1000);
 
 
                if ((i == 0))
                {
                    swSplineHandle.X = -62.33246528 / 1000;
                    swSplineHandle.Y = -14.71944444 / 1000;
 
                }
 
                Debug.Print(" Tangent magnitude: " + swSplineHandle.get_TangentMagnitude((int)swTangentMagnitudeDirection_e.swTangentMagnitudeDirection1));
                Debug.Print(" Tangent radial direction: " + swSplineHandle.TangentRadialDirection);
 
 
                if ((i == 2))
                {
                    swSplineHandle.set_TangentMagnitude((int)swTangentMagnitudeDirection_e.swTangentMagnitudeDirection1, swSplineHandle.get_TangentMagnitude((int)swTangentMagnitudeDirection_e.swTangentMagnitudeDirection1) + 0.02);
                    swSplineHandle.TangentRadialDirection = swSplineHandle.TangentRadialDirection + 0.5;
 
                }
 
 
                Debug.Print(" Curvature: " + swSplineHandle.Curvature);
                Debug.Print(" Radius of curvature: " + swSplineHandle.RadiusOfCurvature);
 
 
 
                if ((i == 3))
                {
                    swSplineHandle.RadiusOfCurvature = swSplineHandle.RadiusOfCurvature / 2;
 
                }
 
 
 
                if ((i == 3))
                {
                    Debug.Print(" Tangent driving? " + swSplineHandle.TangentDriving);
 
                    if ((swSplineHandle.TangentDriving))
                    {
                        swSplineHandle.TangentDriving = false;
                    }
                    else
                    {
                        swSplineHandle.TangentDriving = true;
                    }
 
                    swSplineHandle.Reset();
 
 
                }
 
            }
 
        }
 
 
 
        /// <summary>
        /// The SldWorks swApp variable is pre-assigned for you.
        /// </summary>
 
        public SldWorks swApp;
 
    }
}