Surface visibility

[AndrewButenko]

Hi!

I check visibility of surface with code:

surface.IsHidden(doc.ActiveView) 

But I have a surface that is not visible in the view. At the same time, the previous code returns "False."
The fact is that this surface is hidden by "Visibility/Graphics..." filter, like a screen:

How do I identify such surfaces?

[jeremytammik]

I believe one solution is to run them through the custom exporter. That will report the results you also see on the screen, including all view settings.

[AndrewButenko · Accepted solution]

Hi Jeremy!
Looks like I found the solution myself. I use the following code:

 Public Function IsElementVisibleInView(View As View, el As Element) As Boolean

        ' Obtain the element's document
        Dim doc As Document = el.Document

        Dim elId As ElementId = el.Id

        ' Create a FilterRule that searches for an element matching the given Id
        Dim idRule As FilterRule = ParameterFilterRuleFactory.CreateEqualsRule(New ElementId(BuiltInParameter.ID_PARAM), elId)
        Dim idFilter = New ElementParameterFilter(idRule)

        ' Use an ElementCategoryFilter to speed up the search, as ElementParameterFilter Is a slow filter
        Dim cat As Category = el.Category
        Dim catFilter = New ElementCategoryFilter(cat.Id)

        ' Use the constructor of FilteredElementCollector that accepts a view id as a parameter to only search that view
        ' Also use the WhereElementIsNotElementType filter to eliminate element types
        Dim collector As FilteredElementCollector = New FilteredElementCollector(doc, View.Id).WhereElementIsNotElementType().WherePasses(catFilter).WherePasses(idFilter)

        ' If the collector contains any items, then we know that the element Is visible in the given view
        Return collector.Any()
    End Function