public static IElement2D RoundCoordinates(this IElement2D element2d, int decimalPlaces = 6) { bool planar = element2d.IIsPlanar(); if (planar) { Vector normal = element2d.FitPlane().Normal.Normalise(); //If the element is planar AND aligned with one of the main coordinate system's planes then rounded element will get projected on this plane to keep it's planarity. if (Math.Abs(Math.Abs(normal.X) - 1) < Tolerance.Angle || Math.Abs(Math.Abs(normal.Y) - 1) < Tolerance.Angle || Math.Abs(Math.Abs(normal.Z) - 1) < Tolerance.Angle) { Plane plane = new Plane() { Origin = Geometry.Modify.RoundCoordinates(element2d.OutlineCurve().StartPoint(), decimalPlaces), Normal = normal.RoundCoordinates(0) }; element2d = element2d.ISetOutlineElements1D(element2d.IOutlineElements1D().Select(x => x.ISetGeometry(Geometry.Modify.IRoundCoordinates(x.IGeometry().IProject(plane), decimalPlaces))).ToList()); return(element2d.ISetInternalElements2D(element2d.IInternalElements2D().Select(y => y.ISetOutlineElements1D(y.IOutlineElements1D().Select(x => x.ISetGeometry(Geometry.Modify.IRoundCoordinates(x.IGeometry().IProject(plane), decimalPlaces))).ToList())).ToList())); } } //Here is the part with the default way of rounding element's coordinates: IElement2D newElement2d = element2d.ISetOutlineElements1D(element2d.IOutlineElements1D().Select(x => x.ISetGeometry(Geometry.Modify.IRoundCoordinates(x.IGeometry(), decimalPlaces))).ToList()); newElement2d = newElement2d.ISetInternalElements2D(newElement2d.IInternalElements2D().Select(y => y.ISetOutlineElements1D(y.IOutlineElements1D().Select(x => x.ISetGeometry(Geometry.Modify.IRoundCoordinates(x.IGeometry(), decimalPlaces))).ToList())).ToList()); if (planar && !newElement2d.IsPlanar()) //If the original element was planar we need to ensure that result is planar as well. { Reflection.Compute.RecordWarning("Rounding the coordinates of an IElement2D couldn't be achieved without losing planarity. No action has been taken."); return(element2d); } return(newElement2d); }