Entities to add to DB

[Anonymous]

If I wanted to create an extruded instance of Solid3d then I'd like to know what entities along the way would i need to add to the DB.

first I will be creating a polyline then a region from it and then extrude the region. there are 3 entities being created so should i add all 3 entities or adding just the last one (extruded solid) would suffice?

[_gile · Accepted solution]

Hi,

Adding the polyline and the regionto the database is not mandatory but you're responsible to dispose the newly created entites you do not add to the database (and transaction).

Here's a simple example:

        static void ExtrudPolyline()
        {
            var db = HostApplicationServices.WorkingDatabase;
            using (var tr = db.TransactionManager.StartTransaction())
            using (var pline = new Polyline(4))
            using (var curves = new DBObjectCollection())
            {
                pline.AddVertexAt(0, new Point2d(10.0, 5.0), 0.0, 0.0, 0.0);
                pline.AddVertexAt(1, new Point2d(20.0, 5.0), 0.0, 0.0, 0.0);
                pline.AddVertexAt(2, new Point2d(20.0, 15.0), 0.0, 0.0, 0.0);
                pline.AddVertexAt(3, new Point2d(10.0, 15.0), 0.0, 0.0, 0.0);
                pline.Closed = true;
                curves.Add(pline);
                using (var regions = Region.CreateFromCurves(curves))
                using (var region = (Region)regions[0])
                using (var solid = new Solid3d())
                {
                    solid.Extrude(region, 10.0, 0.0);
                    var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite);
                    curSpace.AppendEntity(solid);
                    tr.AddNewlyCreatedDBObject(solid, true);
                }
                tr.Commit();
            }
        }

[Anonymous]

Thanks and very much appreciated!