topic Re: Generate Direct Shape from Selected Wall Geometry in Revit API Forum

Generate Direct Shape from Selected Wall Geometry

zrodgersTSSSU — Thu, 27 May 2021 15:16:06 GMT

Hey Everyone, So dynamo allows you to get an elements geometry and then create a direct shape from the returned geometry. I am trying to do that same thing with API. I want to select a wall get its geometry and then create a direct shape that reflects all the openings in the wall. I originally was going to copy and paste the wall in place then rotate it but revit doesnt alow you to rotate walls in the direction i want.

using (Transaction tx = new Transaction(doc)) { tx.Start("Generate Tilt Wall"); foreach (ElementId elemId in selectedIds) { try { Element elem = uidoc.Document.GetElement(elemId); if((BuiltInCategory)elem.Category.Id.IntegerValue == BuiltInCategory.OST_Walls) { Options opts = new Options(); GeometryElement geoEle = elem.get_Geometry(opts); XYZ newloc = new XYZ(0, 0, 0); //gets wall curve for rotation Curve eleCurve = (elem.Location as LocationCurve).Curve; XYZ startPoint = eleCurve.GetEndPoint(0); XYZ endPoint = eleCurve.GetEndPoint(1); //need to set this equal to something so i can modify it //ICollection<ElementId> newElemColl = ElementTransformUtils.CopyElement(doc, elemId, newloc); //ElementId newEleId = newElemColl.First(); XYZ pt1 = new XYZ(0, 0, 0); XYZ pt2 = new XYZ(0, 0, 10); Line axis = Line.CreateBound(pt1, pt2); //ElementTransformUtils.RotateElement(doc, newEleId, axis, rotAngle); DirectShape ds = DirectShape.CreateElement(doc, new ElementId(BuiltInCategory.OST_Walls)); ds.ApplicationId = "Application id"; ds.ApplicationDataId = "Geometry object id"; ds.SetShape(new GeometryObject[] { geoEle }); } } catch(Exception e) { throw e; } } tx.Commit(); }

error:

Re: Generate Direct Shape from Selected Wall Geometry

RPTHOMAS108 — Thu, 27 May 2021 16:42:42 GMT

From DirectShapeType.SetShape method noted in Revit API.chm:

pGeomArr
Type: System.Collections.Generic.IList<(Of <(<'GeometryObject>)>)>
Shape of this object expressed as a collection of GeometryObjects. These will be copied. Shape and Category should be consistent: geometry supplied as shape should be valid for the Category the type object is associated with. The supported types of GeometryObjects are: Solid, Mesh, GeometryInstance, Point, Curve and PolyLine.

i.e. GeometryElement (a collection of primitives) is not a supported GeometryObject.

You have to take the items out of it that are supported above and put them in your input list of GeometryObject.

Re: Generate Direct Shape from Selected Wall Geometry

zrodgersTSSSU — Thu, 27 May 2021 16:58:13 GMT

@RPTHOMAS108 thank you for the quick response. I got the solids and created the direct shape this way.

Element elem = uidoc.Document.GetElement(elemId); if((BuiltInCategory)elem.Category.Id.IntegerValue == BuiltInCategory.OST_Walls) { Options opts = new Options(); opts.ComputeReferences = true; opts.IncludeNonVisibleObjects = true; GeometryElement geoEle = elem.get_Geometry(opts); foreach (GeometryObject geomObj in geoEle) { Solid geomSolid = geomObj as Solid; if (null != geomSolid) { DirectShape ds = DirectShape.CreateElement(doc, new ElementId(BuiltInCategory.OST_Walls)); ds.ApplicationId = "Application id"; ds.ApplicationDataId = "Geometry object id"; ds.SetShape(new GeometryObject[] {geomSolid}); } }

however... when i run it it gives me 4 extra solids.... seem to be faces. any idea how to only get the solid in the back?

Re: Generate Direct Shape from Selected Wall Geometry

RPTHOMAS108 — Thu, 27 May 2021 17:06:16 GMT

You are including non-visible objects:

opts.IncludeNonVisibleObjects = true

I would set that to false, have a look in RevitLookup to try an understand their meaning. Could be related to layers or references within the wall (not necessarily useful).

Re: Generate Direct Shape from Selected Wall Geometry

zrodgersTSSSU — Thu, 27 May 2021 17:09:03 GMT

Thank you that worked!!!