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Get Spline's Parameters Example (C#)

This example shows how to get spline parameterization data for a selected sketch.

//----------------------------------------------------------------------------
// Preconditions:
// 1. Open a new part document.
// 2. Rename the namespace of this macro to match the name of your C# project.
// 3. Open an Immediate Window.
//
// Postconditions:
// 1. A sketch with a spline is created and selected.
// 2. Inspect the Immediate Window to view the spline's parameterization data.
//-----------------------------------------------
using SolidWorks.Interop.sldworks;
using SolidWorks.Interop.swconst;
using System;
using System.Diagnostics;
namespace GetSplineParameterData_CSharp.csproj
{
    
partial class SolidWorksMacro
    {
        
ModelDoc2 swModel;
        
SelectionMgr swSelMgr;
        
Feature swFeat;
        
Sketch swSketch;
        
SplineParamData swSplineParaData;
        
object varCtrlPoints;
        
double[] ctrlPoints;
        
object varKnotPoints;
        
double[] knotPoints;
        
bool boolStatus;
        
int i;
        
SketchManager swSketchMgr;
        
double[] arrCtrlPts = new double[18];
        
double[] arrKnotPts = new double[10];
        
object varSeg;

        
public void Main()
        {
            swModel = (
ModelDoc2)swApp.ActiveDoc;
            swSketchMgr = swModel.SketchManager;
            swSplineParaData = swSketchMgr.CreateSplineParamData();

            swSplineParaData.Dimension = 3;
            swSplineParaData.Order = 4;
            swSplineParaData.Periodic = 0;
            swSplineParaData.ControlPointsCount = 6;

            arrCtrlPts[0] = -0.0508;
            arrCtrlPts[1] = 0.0254;
            arrCtrlPts[2] = 0;

            arrCtrlPts[3] = -0.0467151082143202;
            arrCtrlPts[4] = 0.0102856278912272;
            arrCtrlPts[5] = 0;

            arrCtrlPts[6] = -0.00128736279059822;
            arrCtrlPts[7] = -0.0242718277078294;
            arrCtrlPts[8] = 0;

            arrCtrlPts[9] = 0.0314466792227059;
            arrCtrlPts[10] = 0.0612396847740687;
            arrCtrlPts[11] = 0;

            arrCtrlPts[12] = 0.060476660388647;
            arrCtrlPts[13] = -0.0433198423870343;
            arrCtrlPts[14] = 0;

            arrCtrlPts[15] = 0.0762;
            arrCtrlPts[16] = 0.0254;
            arrCtrlPts[17] = 0;

            boolStatus = swSplineParaData.SetControlPoints(arrCtrlPts);

            arrKnotPts[0] = 0;
            arrKnotPts[1] = 0;
            arrKnotPts[2] = 0;
            arrKnotPts[3] = 0;
            arrKnotPts[4] = 0.362665828616751;
            arrKnotPts[5] = 0.575110552411167;
            arrKnotPts[6] = 1;
            arrKnotPts[7] = 1;
            arrKnotPts[8] = 1;
            arrKnotPts[9] = 1;
            boolStatus = swSplineParaData.SetKnotPoints(arrKnotPts);
            varSeg = swSketchMgr.CreateSplinesByEqnParams2(swSplineParaData);

            swSketchMgr.InsertSketch(
true);

            boolStatus = swModel.Extension.SelectByID2(
"Sketch1", "SKETCH", 0, 0, 0, false, 0, null, (int)swSelectOption_e.swSelectOptionDefault);

            swSelMgr = (
SelectionMgr)swModel.SelectionManager;
            swFeat = (
Feature)swSelMgr.GetSelectedObject6(1, -1);
            swSketch = (
Sketch)swFeat.GetSpecificFeature2();
            
Debug.Print(swFeat.Name);
            
Debug.Print("");

            swSplineParaData = swSketch.GetSplineParams4(
true);

            
Debug.Print("The dimension is: " + swSplineParaData.Dimension);
            
Debug.Print("The order is: " + swSplineParaData.Order);
            
Debug.Print("The periodicity is: " + swSplineParaData.Periodic);
            
Debug.Print("The control point count is: " + swSplineParaData.ControlPointsCount);
            boolStatus = swSplineParaData.GetControlPoints(
out varCtrlPoints);
            
Debug.Print("Control Points:");
            ctrlPoints = (
double[])varCtrlPoints;
            
for (i = 0; i <= ctrlPoints.GetUpperBound(0); i++)
            {

                
Debug.Print(ctrlPoints[i].ToString());
            }
            
Debug.Print("The knot point count is: " + swSplineParaData.KnotPointsCount);
            boolStatus = swSplineParaData.GetKnotPoints(
out varKnotPoints);
            
Debug.Print("Knot Points:");
            knotPoints = (
double[])varKnotPoints;
            
for (i = 0; i <= knotPoints.GetUpperBound(0); i++)
            {

                
Debug.Print(knotPoints[i].ToString());
            }
            
Debug.Print("The color is: " + swSplineParaData.Color);
            
Debug.Print("The line style is: " + swSplineParaData.LineStyle);
            
Debug.Print("The line width is: " + swSplineParaData.LineWidth);
            
Debug.Print("The layer is: " + swSplineParaData.Layer);

            
Debug.Print("The layer override is: " + swSplineParaData.LayerOverride);
        }
        
public SldWorks swApp;
    }

}



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