/// <summary>
/// This node will try to check if the walls profile has been modified using the dependent elements method available in Revit 2018.1+
/// </summary>
/// <param name="wall">The walls to check.</param>
/// <returns name="modelCurves">The result.</returns>
/// <search>
/// profile, wall
/// </search>
public static global::Revit.Elements.Element[] EditedProfile(global::Revit.Elements.Element wall)
{
Autodesk.Revit.DB.Document doc = DocumentManager.Instance.CurrentDBDocument;
Autodesk.Revit.DB.Element internalWall = wall.InternalElement;
//dependent elements method (available in Revit 2018.1 +)
Autodesk.Revit.DB.ElementFilter elemFilter = new ElementIsElementTypeFilter(true);
IList <ElementId> elemIds = internalWall.GetDependentElements(elemFilter);
//get the elements
List <Autodesk.Revit.DB.Element> elems = new List <Element>(elemIds.Select(e => doc.GetElement(e)));
global::Autodesk.Revit.DB.Element[] internalCurves = elems.Where(e => e is Autodesk.Revit.DB.ModelCurve).ToArray();
global::Revit.Elements.Element[] modelCurves = internalCurves.Select(e => e.ToDSType(true)).ToArray();
return(modelCurves);
}
private static List <Polygon> GetProfile(this Autodesk.Revit.DB.Element element)
{
Document doc = element.Document;
List <Polygon> polygons = new List <Polygon>();
IList <Reference> firstSideFaces = null;
IList <Reference> secondSideFaces = null;
switch (element)
{
case Wall revitWall:
//use host object utils to get the outside face
firstSideFaces = HostObjectUtils.GetSideFaces(revitWall, ShellLayerType.Exterior);
secondSideFaces = HostObjectUtils.GetSideFaces(revitWall, ShellLayerType.Interior);
break;
case Autodesk.Revit.DB.Floor revitFloor:
firstSideFaces = HostObjectUtils.GetTopFaces(revitFloor);
secondSideFaces = HostObjectUtils.GetBottomFaces(revitFloor);
break;
}
Element faceElement = doc.GetElement(firstSideFaces[0]);
if (!(faceElement.GetGeometryObjectFromReference(firstSideFaces[0]) is Face exteriorFace) || !(faceElement.GetGeometryObjectFromReference(secondSideFaces[0]) is Face interiorFace))
{
return(null);
}
//this lets us pick the biggest face of the two sides. This is important because we want the shapes to close. 😁
Face face = exteriorFace.Area > interiorFace.Area ? exteriorFace : interiorFace;
// get the edges as curve loops and use the IFCUtils to sort them
// credit: https://thebuildingcoder.typepad.com/blog/2015/01/getting-the-wall-elevation-profile.html
IList <CurveLoop> curveLoops = face.GetEdgesAsCurveLoops();
//this does the sorting so outside is the first item
IList <CurveLoop> loops = ExporterIFCUtils.SortCurveLoops(curveLoops)[0];
for (int i = 0; i < loops.Count; i++)
{
//here for outermost loop
if (i == 0)
{
var outer = loops[i];
List <Vector3> vertices = new List <Vector3>();
foreach (Autodesk.Revit.DB.Curve c in outer)
{
vertices.Add(c.GetEndPoint(0).ToVector3());
}
polygons.Add(new Polygon(vertices));
}
//here for the inner loops (voids)
else
{
var inner = loops[i];
List <Vector3> vertices = new List <Vector3>();
foreach (Autodesk.Revit.DB.Curve c in inner)
{
vertices.Add(c.GetEndPoint(0).ToVector3());
}
Polygon innerPolygon = new Polygon(vertices);
polygons.Add(innerPolygon);
}
}
return(polygons);
}
