How to fillet edges of a Solid3d?

By Philippe Leefsma

 

The following C# sample demonstrates the use of "Solid3d.FilletEdges" method:

[CommandMethod("TestFillet")]

public void TestFillet()

{

    Document doc = Application.DocumentManager.MdiActiveDocument;

    Database db = doc.Database;

 

    using (Transaction Tx = db.TransactionManager.StartTransaction())

    {

        BlockTableRecord blkRec =

            Tx.GetObject(db.CurrentSpaceId, OpenMode.ForWrite, false)

                as BlockTableRecord;

 

        Solid3d solid = new Solid3d();

 

        solid.CreateBox(500.0, 400.0, 1000.0);

 

        blkRec.AppendEntity(solid);

        Tx.AddNewlyCreatedDBObject(solid, true);

 

        ObjectId[] ids = new ObjectId[] { solid.ObjectId };

 

        SubentityId subentId = new SubentityId(

            SubentityType.Null, IntPtr.Zero);

 

        FullSubentityPath path = new FullSubentityPath(

            ids, subentId);

 

        List<SubentityId> subentIds = new List<SubentityId>();

        DoubleCollection radii = new DoubleCollection();

        DoubleCollection startSetback = new DoubleCollection();

        DoubleCollection endSetback = new DoubleCollection();

 

        using (Autodesk.AutoCAD.BoundaryRepresentation.Brep brep =

            new Autodesk.AutoCAD.BoundaryRepresentation.Brep(path))

        {

            foreach (Autodesk.AutoCAD.BoundaryRepresentation.Edge

                edge in brep.Edges)

            {

                subentIds.Add(edge.SubentityPath.SubentId);

                radii.Add(10.0);

 

                // Setback fillets. Defines a setback distance

                // from a vertex at which the fillets start to blend

                startSetback.Add(5.0);

                endSetback.Add(5.0);

            }

        }

 

        solid.FilletEdges(

            subentIds.ToArray(),

            radii,

            startSetback,

            endSetback);

 

        Tx.Commit();

    }

}

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