.net - .PointLocation

[brianchapmandesign]

This works fine if my alignment starts at 0+00.. but throws an error when I change the alignments start station to 1+00 or anything else. Any idea why, and hhow I can correct it?

myalign.PointLocation(newdist, 0, 0.0001, ref xValue, ref yValue, ref bearing);

[Jeff_M]

How are you obtaining the newdist variable, Brian? If this is a distance along the alignment, and the distance is less than the start station, it will fail.

May help to see more code and a sample data set. I use this method a lot in my code and have never seen a problem.

[brianchapmandesign]

Thanks Jeff! Don't really have anything was just doing a simple while loop to list the station coordinates.

Do you have a working sample you can post?

[Jeff_M · Accepted solution]

Here ya go, Brian. I create a 550' long alignment from a polyline, set the ReferenceStation to 20+00, then run a loop at 100' increments to get the location of the station.

        [CommandMethod("TestAlignStations")]
        public void testalignstations()
        {
            Document doc = Application.DocumentManager.MdiActiveDocument;
            Database db = doc.Database;
            Editor ed = doc.Editor;
            CivilDocument civdoc = CivilApplication.ActiveDocument;
            using (Transaction tr = db.TransactionManager.StartTransaction())
            {
                Polyline pline = new Polyline(2);
                pline.AddVertexAt(0, new Point2d(0, 0), 0, 0, 0);
                pline.AddVertexAt(1, new Point2d(0, 550), 0, 0, 0);
                BlockTable bt = (BlockTable)db.BlockTableId.GetObject(OpenMode.ForRead);
                BlockTableRecord btr = (BlockTableRecord)bt[BlockTableRecord.ModelSpace].GetObject(OpenMode.ForWrite);
                btr.AppendEntity(pline);
                tr.AddNewlyCreatedDBObject(pline, true);
                ObjectId layerId = db.Clayer;
                ObjectId siteId = ObjectId.Null;
                ObjectId alignStyle = civdoc.Styles.AlignmentStyles["Standard"];
                ObjectId alignStyleSet = civdoc.Styles.LabelSetStyles.AlignmentLabelSetStyles["Standard"];
                PolylineOptions pOpts = new PolylineOptions();
                pOpts.AddCurvesBetweenTangents = false;
                pOpts.EraseExistingEntities = true;
                pOpts.PlineId = pline.ObjectId;
                Alignment align = (Alignment)Alignment.Create(civdoc, pOpts, "TestAlignment", siteId, layerId, alignStyle, alignStyleSet).GetObject(OpenMode.ForWrite);
                align.ReferencePointStation = 2000;
                for (double i = align.StartingStation; i < align.EndingStation; i += 100)
                {
                    double n = 0, e = 0;
                    align.PointLocation(i, 0, ref n, ref e);
                    ed.WriteMessage("\nStation {0} is located at {1}, {2}", align.GetStationStringWithEquations(i), n.ToString("F2"), e.ToString("F2"));
                }
                tr.Commit();
            }
        }

[brianchapmandesign]

haha...hate how stupid you make me feel sometimes jeff lol... I was trying to make my routine walk through distances by adding 50 from zero until I got to or above the start station hahaha...have no idea why I didn't just set it to the starting station... i need a vacation my brain is toast