topic Re: Return Linked Walls In Active View from User Selections in Revit API Forum

Return Linked Walls In Active View from User Selections

Mark.Ackerley — Thu, 07 May 2020 08:02:48 GMT

Hi,

Apologies for what must be a basic question... As part of a larger script, when the user selects a single linked wall, I would like to return all the linked walls in the active view. Unfortunately, instead, all the walls in the current document active view are returned!

Any advice greatly appreciated 🙂

Mark

obt = ObjectType.LinkedElement refElemsLinked = uidoc.Selection.PickObjects(obt, "Please pick an element in the linked model") linkInst = doc.GetElement(refElemsLinked[0].ElementId) transform = linkInst.GetTotalTransform() elem = doc.GetElement(refElemsLinked[0].ElementId) docLinked = elem.GetLinkDocument() fec=ElementCategoryFilter(BuiltInCategory.OST_Walls) collectedWalls = FilteredElementCollector(docLinked,doc.ActiveView.Id).WherePasses(fec).WhereElementIsNotElementType().ToElements()

Re: Return Linked Walls In Active View from User Selections

Mark.Ackerley — Thu, 07 May 2020 09:13:58 GMT

Hah, my test file was just a duplicate of my test link file, so Revit got confused 🙂

Re: Return Linked Walls In Active View from User Selections

TripleM-Dev.net — Thu, 07 May 2020 09:20:47 GMT

Hi,

You can't retrieve elements from a linked document using a host view (they don't exist in same context!)

You need to create a virtual solid from the views extends (3D) and use this in the linkdocument as a intersection tool to get the walls using WherePasses and ElementIntersectsSolidFilter.

examples should be in this forum, see: Collect elements from link document in view of host document

Under the assumption no linked elements are hidden by user, filter, phase settings etc...

- Michel

Re: Return Linked Walls In Active View from User Selections

Mark.Ackerley — Thu, 07 May 2020 09:28:43 GMT

Hey,

Thanks for the response, it seems to work fine here? Perhaps you would be good enough to clarify? (I'm really no expert at this!)

Cheers,

Mark

Re: Return Linked Walls In Active View from User Selections

TripleM-Dev.net — Thu, 07 May 2020 09:39:36 GMT

Not clear what this all is, some explanation about source and results.

Dynamo nodes with some settings and a view which seems to have ALL walls in view (this would work yes!)

Any walls outside view?

Maybe the DynamoNode does the same internally (custom node from a external dynamo library?)

A picture as below would be more clearly.

The red elements were "visible" in the view of the host and the id's were used to mark the elements in the linked document.

Re: Return Linked Walls In Active View from User Selections

Mark.Ackerley — Thu, 07 May 2020 09:47:00 GMT

Hi,

Oh yes, good spot, if i crop my view down, i still get all the walls in the link!

I'll have a look at the link you posted.

Cheers,

Mark