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Registered: ‎05-17-2009
Post 1 of 3
Accepted Solution

Adding a Vertex to a closed Polyline

410 Views, 2 Replies
08-13-2013 04:30 AM

I have a method for inserting a vertex to a polyline. But this does not work for closed polylines for the case shown below. The code fails if the point is on the last edge of the polyline. Can someone look into it?

 

 

public void AddVertexOnPolyline(Point3d addPoint,Polyline editPolyline)
        {
            Document acDoc = Autodesk.AutoCAD.ApplicationServices.Core.Application.DocumentManager.MdiActiveDocument;
            Editor pEditor = acDoc.Editor;
            int chk = 1;
            try
            {
                for (int i = 0; (i <= (editPolyline.NumberOfVertices - 1)); i++)
                {
                    double dist1 = editPolyline.GetDistAtPoint(addPoint);
                    double dist2 = editPolyline.GetDistAtPoint(editPolyline.GetPoint3dAt(i));

                    if ((editPolyline.GetDistAtPoint(addPoint) < (editPolyline.GetDistAtPoint(editPolyline.GetPoint3dAt(i)))) && chk != 0)
                    {
                        Point2d pnt2 = new Point2d(addPoint.X, addPoint.Y);
                        editPolyline.AddVertexAt(i, pnt2, 0, 0, 0);
                        chk = 0;
                        break;
                    }
                }
            }
            catch (System.Exception ex)
            {
                throw;
            }
        }

 

This works for me. Note that I chose a slightly different method of obtaining the index to add it to.

 

 public void AddVertexOnPolyline(Point3d addPoint, Polyline editPolyline)
{
try
{
Point3d ptOnPline = editPolyline.GetClosestPointTo(addPoint, false);
double parm = editPolyline.GetParameterAtPoint(ptOnPline);
Point2d pnt2 = new Point2d(addPoint.X, addPoint.Y);
editPolyline.AddVertexAt((int)System.Math.Floor(parm) + 1, pnt2, 0, 0, 0);
}
catch (System.Exception ex)
{
throw;
}
}

 

*Expert Elite*
4,614 Posts
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Registered: ‎07-22-2003
Post 2 of 3

Re: Adding a Vertex to a closed Polyline

08-15-2013 01:59 PM in reply to: vinayan

This works for me. Note that I chose a slightly different method of obtaining the index to add it to.

 

        public void AddVertexOnPolyline(Point3d addPoint, Polyline editPolyline)
        {
            try
            {
                Point3d ptOnPline = editPolyline.GetClosestPointTo(addPoint, false);
                double parm = editPolyline.GetParameterAtPoint(ptOnPline);
                Point2d pnt2 = new Point2d(addPoint.X, addPoint.Y);
                editPolyline.AddVertexAt((int)System.Math.Floor(parm) + 1, pnt2, 0, 0, 0);
            }
            catch (System.Exception ex)
            {
                throw;
            }
        }

 

Jeff_M, also a frequent Swamper
Contributor
13 Posts
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Registered: ‎05-17-2009
Post 3 of 3

Re: Adding a Vertex to a closed Polyline

08-20-2013 03:43 AM in reply to: vinayan

Jeff,

 

That worked out fine!

thanks a lot

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