private static void CreateInstancesOnHostFamilyFaces(FamilySymbol familySymbol, FamilyInstance hostInstance)
{
var faces = GetSolids(hostInstance)
.SelectMany(x => x.Faces.OfType<PlanarFace>());
var doc = familySymbol.Document;
using (var transaction = new Transaction(doc, "create families"))
{
transaction.Start();
if (!familySymbol.IsActive)
familySymbol.Activate();
foreach (var planarFace in faces)
{
var faceBox = planarFace.GetBoundingBox();
var center = planarFace.Evaluate(0.5 * (faceBox.Max + faceBox.Min));
doc.Create.NewFamilyInstance(planarFace, center, XYZ.Zero, familySymbol);
}
transaction.Commit();
}
}
private static IEnumerable<Solid> GetSolids(Element element)
{
var geometry = element
.get_Geometry(new Options { ComputeReferences = true });
if (geometry == null)
return Enumerable.Empty<Solid>();
return GetSolids(geometry)
.Where(x => x.Volume > 0);
}
private static IEnumerable<Solid> GetSolids(IEnumerable<GeometryObject> geometryElement)
{
foreach (var geometry in geometryElement)
{
var solid = geometry as Solid;
if (solid != null)
yield return solid;
var instance = geometry as GeometryInstance;
if (instance != null)
foreach (var instanceSolid in GetSolids(instance.GetInstanceGeometry()))
yield return instanceSolid;
var element = geometry as GeometryElement;
if (element != null)
foreach (var elementSolid in GetSolids(element))
yield return elementSolid;
}
}
public Autodesk.Revit.UI.Result Execute(ExternalCommandData cmdData, ref string msg, ElementSet eleSet)
{
Selection selection = cmdData.Application.ActiveUIDocument.Selection;
m_doc = cmdData.Application.ActiveUIDocument.Document;
FamilyInstance ins= null;
try
{
Reference selected = selection.PickObject(ObjectType.Element, "select:");
Element elemPick = m_doc.GetElement(selected.ElementId);
ins = elemPick as FamilyInstance;
}
catch (System.Exception)
{
return Result.Succeeded;
}
FamilySymbol type = null;
FilteredElementCollector elemCollector = new FilteredElementCollector(doc);
elemCollector.OfClass(typeof(FamilySymbol));
foreach (Element ent in elemCollector)
{
FamilySymbol obj = ent as FamilySymbol;
if (obj.Family.Name.CompareTo("famName") == 0)
{
type = obj;
break;
}
}
CreateInstancesOnHostFamilyFaces(type, ins);
return Result.Succeeded;
｝
