1/// <summary>
 2/// Illustrates Smoothing a TIN Surface
 3/// </summary>
 4[CommandMethod("SmoothTinSurface")]
 5public void SmoothTinSurface()
 6{
 7    using (Transaction ts = Application.DocumentManager.MdiActiveDocument.Database.TransactionManager.StartTransaction())
 8    {
 9        try
10        {
11            // Select a TIN Surface:     
12            ObjectId surfaceId = promptForEntity("Select a TIN surface to smooth\n", typeof(TinSurface));
13            TinSurface oSurface = surfaceId.GetObject(OpenMode.ForWrite) as TinSurface;
14
15            // Select a polyline to define the output region:
16            ObjectId polylineId = promptForEntity("Select a polyline to define the output region\n", typeof(Polyline));
17            Point3dCollection points = new Point3dCollection();
18            Polyline polyline = polylineId.GetObject(OpenMode.ForRead) as Polyline;
19
20            // Convert the polyline into a collection of points:
21            int count = polyline.NumberOfVertices;
22            for (int i = 0; i < count; i++)
23            {
24                points.Add(polyline.GetPoint3dAt(i));
25            }
26
27            // Set the options:
28            SurfacePointOutputOptions output = new SurfacePointOutputOptions();
29            output.OutputLocations = SurfacePointOutputLocationsType.Centroids;
30            output.OutputRegions = new Point3dCollection[] { points };
31
32            SurfaceOperationSmooth op = oSurface.SmoothSurfaceByNNI(output);
33
34            editor.WriteMessage("Output Points: {0}\n", op.OutPutPoints.Count);
35
36            // Commit the transaction
37            ts.Commit();
38        }
39        catch (System.Exception e) { editor.WriteMessage(e.Message); }
40    }
41}