topic Exception: eInvalidInput Surface.CreateFrom(pl3d) in .NET Forum

Exception: eInvalidInput Surface.CreateFrom(pl3d)

wokeyiyognshenme — Sun, 17 Mar 2024 04:23:29 GMT

Point3d pt_left_down = new Point3d(432536.587782616, 2687388.25631493, 878.298840506535); Point3d pt_right_down = new Point3d(432550.741108191, 2687388.25631493, 870.545233657537); Point3d pt_left_up = new Point3d(432537.786447037, 2687391.85152945, 880.486865788067); Vector3d vec = pt_right_down - pt_left_down; Point3d pt_right_up = pt_left_up + vec; Point3dCollection pt3ds = new Point3dCollection(); pt3ds.Add(pt_left_down); pt3ds.Add(pt_left_up); pt3ds.Add(pt_right_up); pt3ds.Add(pt_right_down); Polyline3d pl3d = new Polyline3d(Poly3dType.SimplePoly, pt3ds, true); //Error //Autodesk.AutoCAD.Runtime.Exception: eInvalidInput //Autodesk.AutoCAD.DatabaseServices.Surface.CreateFrom(Entity fromEntity) Autodesk.AutoCAD.DatabaseServices.Surface surface = Autodesk.AutoCAD.DatabaseServices.Surface.CreateFrom(pl3d); Document doc = Autodesk.AutoCAD.ApplicationServices.Application.DocumentManager.MdiActiveDocument; doc.AddToModelSpace(surface);

Re: Exception: eInvalidInput Surface.CreateFrom(pl3d)

_gile — Sun, 17 Mar 2024 07:36:00 GMT

Hi,

It seems there's an accuracy issue with the input points and the computed one (pt_right_up) which generate a Polyline 3d which is not exactly planar (e.g. it cannot be converted into a Region).

A workaround should be using a Polyline instead.

Point3d pt_left_down = new Point3d(432536.587782616, 2687388.25631493, 878.298840506535); Point3d pt_right_down = new Point3d(432550.741108191, 2687388.25631493, 870.545233657537); Point3d pt_left_up = new Point3d(432537.786447037, 2687391.85152945, 880.486865788067); Vector3d normal = (pt_right_down - pt_left_down).CrossProduct(pt_left_up - pt_left_down).GetNormal(); Plane plane = new Plane(Point3d.Origin, normal); double elevation = pt_left_down.TransformBy(Matrix3d.WorldToPlane(plane)).Z; Point2d pt1 = pt_left_down.Convert2d(plane); Point2d pt2 = pt_right_down.Convert2d(plane); Point2d pt4 = pt_left_up.Convert2d(plane); Point2d pt3 = pt2 + (pt4 - pt1); using (var tr = db.TransactionManager.StartTransaction()) { var curSpace = (BlockTableRecord)tr.GetObject(db.CurrentSpaceId, OpenMode.ForWrite); using (var pline = new Polyline(4)) { pline.AddVertexAt(0, pt1, 0.0, 0.0, 0.0); pline.AddVertexAt(1, pt2, 0.0, 0.0, 0.0); pline.AddVertexAt(2, pt3, 0.0, 0.0, 0.0); pline.AddVertexAt(3, pt4, 0.0, 0.0, 0.0); pline.Closed = true; pline.Normal = normal; pline.Elevation = elevation; var surface = Autodesk.AutoCAD.DatabaseServices.Surface.CreateFrom(pline); curSpace.AppendEntity(surface); tr.AddNewlyCreatedDBObject(surface, true); } tr.Commit(); }

Re: Exception: eInvalidInput Surface.CreateFrom(pl3d)

_gile — Sun, 17 Mar 2024 07:54:42 GMT

Or, simpler, use Surface.CreateExtrudedSurface.