/// <summary>
/// Gets the element's projection area.
/// </summary>
/// <param name="elm">A element</param>
/// <exception cref="T:Autodesk.Revit.Exceptions.ArgumentNullException">The input element is invalid.</exception>
/// <returns>Returns projection area.</returns>
public static double GetShadowArea(this Element elm)
{
if (elm is null)
{
throw new ArgumentNullException(nameof(elm));
}
if (!elm.IsValidObject)
{
throw new InvalidDataException(nameof(elm));
}
if (elm.Id.IntegerValue == -1)
{
throw new InvalidDataException(nameof(elm));
}
var areas = new List <double>();
var geo = elm.get_Geometry(new Options());
foreach (var instance in geo.Select(s => s as GeometryInstance))
{
if (instance is null)
{
continue;
}
foreach (var item in instance.GetInstanceGeometry())
{
var solid = item as Solid;
if (null == solid || solid.Faces.Size <= 0)
{
continue;
}
var plane = XYZ.BasisZ.CreatePlane(XYZ.Zero);
ExtrusionAnalyzer analyzer;
try
{
analyzer = ExtrusionAnalyzer.Create(solid, plane, XYZ.BasisZ);
}
catch
{
continue;
}
if (analyzer is null)
{
continue;
}
areas.Add(analyzer.GetExtrusionBase().Area);
}
}
return(areas.Max());
}
/// <summary>
/// Gets the element's projection area.
/// </summary>
/// <param name="elm">A element</param>
/// <remarks>Returns projection area, that area unit is square meter.</remarks>
/// <exception cref="T:Autodesk.Revit.Exceptions.ArgumentNullException">The input element is invalid.</exception>
/// <returns>Returns projection area.</returns>
public static double GetShadowArea(this Element elm)
{
if (elm == null)
{
throw new ArgumentNullException(nameof(elm));
}
var areas = new List <double>();
var geo = elm.get_Geometry(new Options());
foreach (var instance in geo.Select(s => s as GeometryInstance))
{
if (instance == null)
{
continue;
}
foreach (var item in instance.GetInstanceGeometry())
{
var solid = item as Solid;
if (null == solid || solid.Faces.Size <= 0)
{
continue;
}
var plane = Plane.CreateByOriginAndBasis(XYZ.Zero, XYZ.BasisX, XYZ.BasisY);
ExtrusionAnalyzer analyzer;
try
{
analyzer = ExtrusionAnalyzer.Create(solid, plane, XYZ.BasisZ);
}
catch
{
continue;
}
if (analyzer == null)
{
continue;
}
areas.Add(analyzer.GetExtrusionBase().Area *FT2_TO_M2);
}
}
return(areas.Max());
}
/// <summary>
/// Add all plan view boundary loops from
/// given solid to the list of loops.
/// The creation application argument is used to
/// reverse the extrusion analyser output curves
/// in case they are badly oriented.
/// </summary>
/// <returns>Number of loops added</returns>
static int AddLoops(
Autodesk.Revit.Creation.Application creapp,
JtLoops loops,
GeometryObject obj,
ref int nExtrusionAnalysisFailures)
{
int nAdded = 0;
Solid solid = obj as Solid;
if (null != solid &&
0 < solid.Faces.Size)
{
//Plane plane = new Plane(XYZ.BasisX,
// XYZ.BasisY, XYZ.Zero); // 2016
Plane plane = Plane.CreateByOriginAndBasis(
XYZ.Zero, XYZ.BasisX, XYZ.BasisY); // 2017
ExtrusionAnalyzer extrusionAnalyzer = null;
try
{
extrusionAnalyzer = ExtrusionAnalyzer.Create(
solid, plane, XYZ.BasisZ);
}
catch (Autodesk.Revit.Exceptions
.InvalidOperationException)
{
++nExtrusionAnalysisFailures;
return(nAdded);
}
Face face = extrusionAnalyzer
.GetExtrusionBase();
loops.Add(GetLoop(creapp, face));
++nAdded;
}
return(nAdded);
}
private static IEnumerable <CurveLoop> GetCountours(
Solid solid,
Element element)
{
try
{
var plane = Plane.CreateByNormalAndOrigin(
XYZ.BasisZ, element.get_BoundingBox(null).Min);
var analyzer = ExtrusionAnalyzer.Create(
solid, plane, XYZ.BasisZ);
var face = analyzer.GetExtrusionBase();
return(face.GetEdgesAsCurveLoops());
}
catch (InvalidOperationException)
{
return(Enumerable.Empty <CurveLoop>());
}
}
/// <summary>
/// Retrieve all plan view boundary loops from
/// all solids of the given element geometry
/// united together.
/// </summary>
internal static JtLoops GetPlanViewBoundaryLoopsGeo(
Autodesk.Revit.Creation.Application creapp,
GeometryElement geo,
ref int nFailures)
{
Solid union = null;
Plane plane = new Plane(XYZ.BasisX,
XYZ.BasisY, XYZ.Zero);
foreach (GeometryObject obj in geo)
{
Solid solid = obj as Solid;
if (null != solid &&
0 < solid.Faces.Size)
{
// Some solids, e.g. in the standard
// content 'Furniture Chair - Office'
// cause an extrusion analyser failure,
// so skip adding those.
try
{
ExtrusionAnalyzer extrusionAnalyzer
= ExtrusionAnalyzer.Create(
solid, plane, XYZ.BasisZ);
}
catch (Autodesk.Revit.Exceptions
.InvalidOperationException)
{
solid = null;
++nFailures;
}
if (null != solid)
{
if (null == union)
{
union = solid;
}
else
{
try
{
union = BooleanOperationsUtils
.ExecuteBooleanOperation(union, solid,
BooleanOperationsType.Union);
}
catch (Autodesk.Revit.Exceptions
.InvalidOperationException)
{
++nFailures;
}
}
}
}
}
JtLoops loops = new JtLoops(1);
AddLoops(creapp, loops, union, ref nFailures);
return(loops);
}