/// <summary>
/// Recursively handle geometry element to
/// retrieve all curves it contains that lie
/// in the given plane
/// </summary>
static void GetCurvesInPlane(
List <Curve> curves,
JtObjCounter geoCounter,
Plane plane,
GeometryElement geo)
{
geoCounter.Increment(geo);
if (null != geo)
{
foreach (GeometryObject obj in geo)
{
geoCounter.Increment(obj);
Solid sol = obj as Solid;
if (null != sol)
{
EdgeArray edges = sol.Edges;
foreach (Edge edge in edges)
{
Curve curve = edge.AsCurve();
Debug.Assert(curve is Line,
"we currently only support lines here");
geoCounter.Increment(curve);
if (IsLineInPlane(curve as Line, plane))
{
curves.Add(curve);
}
}
}
else
{
GeometryInstance inst = obj as GeometryInstance;
if (null != inst)
{
GetCurvesInPlane(curves, geoCounter,
plane, inst.GetInstanceGeometry());
}
else
{
Debug.Assert(false,
"unsupported geometry object "
+ obj.GetType().Name);
}
}
}
}
}
public Result Execute(
ExternalCommandData commandData,
ref string message,
ElementSet elements)
{
UIApplication uiapp = commandData.Application;
UIDocument uidoc = uiapp.ActiveUIDocument;
Application app = uiapp.Application;
Document doc = uidoc.Document;
View section_view = commandData.View;
Parameter p = section_view.get_Parameter(
BuiltInParameter.VIEWER_BOUND_FAR_CLIPPING);
if (ViewType.Section != section_view.ViewType ||
ViewDetailLevel.Fine != section_view.DetailLevel ||
1 != p.AsInteger())
{
message = _instructions;
return(Result.Failed);
}
FilteredElementCollector a
= new FilteredElementCollector(
doc, section_view.Id);
Options opt = new Options()
{
ComputeReferences = false,
IncludeNonVisibleObjects = false,
View = section_view
};
SketchPlane plane1 = section_view.SketchPlane; // this is null
Plane plane2 = Plane.CreateByNormalAndOrigin(
section_view.ViewDirection,
section_view.Origin);
JtObjCounter geoCounter = new JtObjCounter();
List <Curve> curves = new List <Curve>();
foreach (Element e in a)
{
geoCounter.Increment(e);
GeometryElement geo = e.get_Geometry(opt);
GetCurvesInPlane(curves,
geoCounter, plane2, geo);
}
Debug.Print("Objects analysed:");
geoCounter.Print();
Debug.Print(
"{0} cut geometry lines found in section plane.",
curves.Count);
using (Transaction tx = new Transaction(doc))
{
tx.Start("Create Section Cut Model Curves");
SketchPlane plane3 = SketchPlane.Create(
doc, plane2);
foreach (Curve c in curves)
{
doc.Create.NewModelCurve(c, plane3);
}
tx.Commit();
}
return(Result.Succeeded);
}