Revit API通过相交过滤器找到与风管相交的对象。

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相交过滤器的应用，比几何相交法简便。Excluding剔除

//找到与风管相交的对象,通过相交过滤器。
[TransactionAttribute(Autodesk.Revit.Attributes.TransactionMode.Manual)]
public class FindIntersectWallsByElement : IExternalCommand
{
    public Result Execute(ExternalCommandData commandData, ref string messages, ElementSet elements)
    {
        UIApplication app = commandData.Application;
        Document doc = app.ActiveUIDocument.Document;
        Transaction trans = new Transaction(doc, "ExComm");
        trans.Start();        //pick the duct
        Selection sel = app.ActiveUIDocument.Selection;
        Reference ref1 = sel.PickObject(ObjectType.Element, "Please pick a duct");
        Element duct = doc.GetElement(ref1);        FilteredElementCollector collector = new FilteredElementCollector(doc);
        //相交过滤器
        ElementIntersectsElementFilter elementFilter = new ElementIntersectsElementFilter(duct, false);
        collector.WherePasses(elementFilter);        List<ElementId> excludes = new List<ElementId>();
        excludes.Add(duct.Id);
        collector.Excluding(excludes);//剔除自身        sel.Elements.Clear();        //Add these interseting element to the selection
        foreach (Element elem in collector)
        {
            sel.Elements.Add(elem);
        }        trans.Commit();
        return Result.Succeeded;
    }
}