1// Setup: create and populate a surface with 100 random points:
 2ObjectId surfaceId = TinSurface.Create(_acaddoc.Database, "Example Surface");
 3TinSurface surface = surfaceId.GetObject(OpenMode.ForWrite) as TinSurface;
 4Point3dGenerator p3dgen = new Point3dGenerator();
 5Point3dCollection locations = p3dgen.AsPoint3dCollection();
 6surface.AddVertices(locations);
 7
 8SurfaceDefinitionBoundaries surfaceBoundaries = surface.BoundariesDefinition;
 9write(String.Format("Existing surface boundary definitions: {0} \n", surfaceBoundaries.Count));
10
11// Define a polygon with 2d points to use as a boundary
12// 
13Point2dCollection point2dBoundary = new Point2dCollection();
14point2dBoundary.Add(new Point2d(10, 10));
15point2dBoundary.Add(new Point2d(10, 90));
16point2dBoundary.Add(new Point2d(90, 90));
17point2dBoundary.Add(new Point2d(90, 10));
18// point2dBoundary.Add(new Point2d(10, 10)); // required for SurfaceBoundaryType.DataClip
19
20surfaceBoundaries.AddBoundaries(point2dBoundary, 1.0, SurfaceBoundaryType.Outer, true);
21
22// Define a polygon with 3d points to use as a boundary
23// 
24Point3dCollection point3dBoundary = new Point3dCollection();
25point3dBoundary.Add(new Point3d(20, 20, 0));
26point3dBoundary.Add(new Point3d(20, 30, 0));
27point3dBoundary.Add(new Point3d(30, 30, 0));
28point3dBoundary.Add(new Point3d(30, 20, 0));
29// point3dBoundary.Add(new Point3d(20, 20, 0)); // required for SurfaceBoundaryType.DataClip
30surfaceBoundaries.AddBoundaries(point3dBoundary, 1.0, SurfaceBoundaryType.Hide, true);
31
32// Define a polygon to use as a boundary
33// 
34Database acadDb = _acaddoc.Database;
35BlockTable blockTable = tr.GetObject(acadDb.BlockTableId, OpenMode.ForRead) as BlockTable;
36BlockTableRecord blockTableRec = tr.GetObject(blockTable[BlockTableRecord.ModelSpace], OpenMode.ForWrite) as BlockTableRecord;
37
38Polyline polyline = new Polyline();
39polyline.SetDatabaseDefaults();
40polyline.AddVertexAt(0, new Point2d(70, 70), 0, 0, 0);
41polyline.AddVertexAt(1, new Point2d(70, 110), 0, 0, 0);
42polyline.AddVertexAt(2, new Point2d(110, 110), 0, 0, 0);
43polyline.AddVertexAt(3, new Point2d(110, 70), 0, 0, 0);
44polyline.Closed = true;
45blockTableRec.AppendEntity(polyline);
46tr.AddNewlyCreatedDBObject(polyline, true);
47
48// Add the polyline's ObjectId to a collection
49ObjectIdCollection verticeIds = new ObjectIdCollection();
50verticeIds.Add(polyline.ObjectId);
51
52surfaceBoundaries.AddBoundaries(verticeIds, 1.0, SurfaceBoundaryType.Show, true);
53
54surface.Rebuild();

 1' Setup: create and populate a surface with 100 random points:
 2Dim surfaceId As ObjectId = TinSurface.Create(_acaddoc.Database, "Example Surface")
 3Dim surface As TinSurface = TryCast(surfaceId.GetObject(OpenMode.ForWrite), TinSurface)
 4Dim p3dgen As New Point3dGenerator()
 5Dim locations As Point3dCollection = p3dgen.AsPoint3dCollection()
 6surface.AddVertices(locations)
 7
 8Dim surfaceBoundaries As SurfaceDefinitionBoundaries = surface.BoundariesDefinition
 9write([String].Format("Existing surface boundary definitions: {0} " & vbLf, surfaceBoundaries.Count))
10
11' Define a polygon with 2d points to use as a boundary
12'
13Dim point2dBoundary As New Point2dCollection()
14point2dBoundary.Add(New Point2d(10, 10))
15point2dBoundary.Add(New Point2d(10, 90))
16point2dBoundary.Add(New Point2d(90, 90))
17point2dBoundary.Add(New Point2d(90, 10))
18' point2dBoundary.Add(new Point2d(10, 10)); // required for SurfaceBoundaryType.DataClip
19
20
21surfaceBoundaries.AddBoundaries(point2dBoundary, 1.0, SurfaceBoundaryType.Outer, True)
22
23' Define a polygon with 3d points to use as a boundary
24' 
25Dim point3dBoundary As New Point3dCollection()
26point3dBoundary.Add(New Point3d(20, 20, 0))
27point3dBoundary.Add(New Point3d(20, 30, 0))
28point3dBoundary.Add(New Point3d(30, 30, 0))
29point3dBoundary.Add(New Point3d(30, 20, 0))
30' point3dBoundary.Add(new Point3d(20, 20, 0)); // required for SurfaceBoundaryType.DataClip
31surfaceBoundaries.AddBoundaries(point3dBoundary, 1.0, SurfaceBoundaryType.Hide, True)
32
33' Define a polygon to use as a boundary
34'
35Dim acadDb As Database = _acaddoc.Database
36Dim blockTable As BlockTable = TryCast(tr.GetObject(acadDb.BlockTableId, OpenMode.ForRead), BlockTable)
37Dim blockTableRec As BlockTableRecord = TryCast(tr.GetObject(blockTable(BlockTableRecord.ModelSpace), OpenMode.ForWrite), BlockTableRecord)
38
39Dim polyline As New Polyline()
40polyline.SetDatabaseDefaults()
41polyline.AddVertexAt(0, New Point2d(70, 70), 0, 0, 0)
42polyline.AddVertexAt(1, New Point2d(70, 110), 0, 0, 0)
43polyline.AddVertexAt(2, New Point2d(110, 110), 0, 0, 0)
44polyline.AddVertexAt(3, New Point2d(110, 70), 0, 0, 0)
45polyline.Closed = True
46blockTableRec.AppendEntity(polyline)
47tr.AddNewlyCreatedDBObject(polyline, True)
48
49' Add the polyline's ObjectId to a collection
50Dim verticeIds As New ObjectIdCollection()
51verticeIds.Add(polyline.ObjectId)
52
53surfaceBoundaries.AddBoundaries(verticeIds, 1.0, SurfaceBoundaryType.Show, True)