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Create Trimmed Curve Example (C#)

This example shows how to create a trimmed curve on a selected face.

//----------------------------------------------------------------------------
// Preconditions:
// 1. Open a part and select a face.
// 2. Open an Immediate window.
//
// Postconditions:
// 1. Creates a trimmed curve.
// 2. 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 CreateTrimmedCurve_CSharp.csproj
{
    
partial class SolidWorksMacro
    {

        
public void Main()
        {
            
ModelDoc2 swModel = default(ModelDoc2);
            
SelectionMgr swSelMgr = default(SelectionMgr);
           
SketchManager swSketchMgr = default(SketchManager);
            
Face2 swFace = default(Face2);
            
Surface swSurf = default(Surface);
            
double[] vFaceUV = null;
            
SurfaceParameterizationData surfParam = default(SurfaceParameterizationData);
            
Curve swCurveU = default(Curve);
            
double[] vUIsoStartPt = null;
            
double[] vUIsoEndPt = null;
            
const double nChordTol = 0.001;
            
const double nLengthTol = 0.001;
            
double nStartParam = 0;
            
double nEndParam = 0;
            
bool bIsClosed = false;
            
bool bIsPeriodic = false;
            
double[] vStartPt = null;
            
double[] vEndPt = null;
            
double[] vTessPts = null;
            
SketchSegment swSketchSeg = default(SketchSegment);
            
int i = 0;
            
bool bRet = false;

            swModel = (
ModelDoc2)swApp.ActiveDoc;
            swSelMgr = (
SelectionMgr)swModel.SelectionManager;
            swFace = (
Face2)swSelMgr.GetSelectedObject6(1, -1);
            swSurf = (
Surface)swFace.GetSurface();

            vFaceUV = (
double[])swFace.GetUVBounds();
            surfParam = swSurf.Parameterization2();

            vUIsoStartPt = (
double[])swSurf.Evaluate((vFaceUV[0] + vFaceUV[1]) / 2.0, vFaceUV[2], 0, 0);
            vUIsoEndPt = (
double[])swSurf.Evaluate((vFaceUV[0] + vFaceUV[1]) / 2.0, vFaceUV[3], 0, 0);

            
Debug.Print("File = " + swModel.GetPathName());
            
Debug.Print("  Face:");
            
Debug.Print("    uRange   = [" + vFaceUV[0] + " , " + vFaceUV[1] + "]");
            
Debug.Print("    vRange   = [" + vFaceUV[2] + " , " + vFaceUV[3] + "]");
            
Debug.Print("  Surface:");
            
Debug.Print("    uRange   = [" + surfParam.UMin + " , " + surfParam.UMax + "]");
            
Debug.Print("    vRange   = [" + surfParam.VMin + " , " + surfParam.VMax + "]");
            
Debug.Print("  U Curve:");
            
Debug.Print("    Start Pt = (" + vUIsoStartPt[0] * 1000 + ", " + vUIsoStartPt[1] * 1000 + ", " + vUIsoStartPt[2] * 1000 + ") mm");
            
Debug.Print("    End   Pt = (" + vUIsoEndPt[0] * 1000 + ", " + vUIsoEndPt[1] * 1000 + ", " + vUIsoEndPt[2] * 1000 + ") mm");

            
// Create untrimmed U curve
            double uvValue;
            uvValue = (vFaceUV[0] + vFaceUV[1]) / 2.0;
            swCurveU = swSurf.MakeIsoCurve2(
false, ref uvValue);

            
// Trim U curve to start and end of U range
            swCurveU = swCurveU.CreateTrimmedCurve2(vUIsoStartPt[0], vUIsoStartPt[1], vUIsoStartPt[2], vUIsoEndPt[0], vUIsoEndPt[1], vUIsoEndPt[2]);

            
Debug.Print("  Trimmed U curve:");
            bRet = swCurveU.GetEndParams(
out nStartParam, out nEndParam, out bIsClosed, out bIsPeriodic);
            
Debug.Print("    Start parameter is " + nStartParam);
            
Debug.Print("    End parameter is " + nEndParam);
            
Debug.Print("    Is closed? " + bIsClosed);
            
Debug.Print("    Is periodic? " + bIsPeriodic);

            vStartPt = (
double[])swCurveU.Evaluate2(nStartParam, 0);
            vEndPt = (
double[])swCurveU.Evaluate2(nEndParam, 0);

            vTessPts = (
double[])swCurveU.GetTessPts(nChordTol, nLengthTol, (vStartPt), (vEndPt));

           
swSketchMgr = (SketchManager)swModel.SketchManager;

            swSketchMgr.Insert3DSketch(
false);
            swModel.SetAddToDB(
true);


            
for (i = 0; i <= vTessPts.GetUpperBound(0) - 3; i += 3)
            {
                swSketchSeg = (
SketchSegment)swModel.CreateLine2(vTessPts[i + 0], vTessPts[i + 1], vTessPts[i + 2], vTessPts[i + 3], vTessPts[i + 4], vTessPts[i + 5]);
            }

            swModel.SetAddToDB(
false);
            swSketchMgr.Insert3DSketch(
true);

            bRet = swModel.EditRebuild3();

        }


        
public SldWorks swApp;

    }
}



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