/// <summary>
/// Create the handle corresponding to the "Axis" IfcRepresentation for a structural member objects, if possible.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC class.</param>
/// <param name="element">The structural member element.</param>
/// <param name="catId">The structural member category id.</param>
/// <param name="axisInfo">The optional structural member axis information.</param>
/// <param name="offsetTransform">The optional offset transform applied to the "Body" representation.</param>
/// <returns>The handle, or null if not created.</returns>
public static IFCAnyHandle CreateStructuralMemberAxis(ExporterIFC exporterIFC, Element element, ElementId catId, StructuralMemberAxisInfo axisInfo, Transform newTransformLCS)
{
if (axisInfo == null)
{
return(null);
}
// This Axis should have been transformed into its ECS position previously (in GetStructuralMemberAxisTransform())
Curve curve = axisInfo.Axis;
Transform offset = Transform.Identity;
if (newTransformLCS != null)
{
// We need to flip the Left-handed transform to the right-hand one as IFC only support right-handed coordinate system
if (newTransformLCS.Determinant < 0)
{
XYZ orig = newTransformLCS.Origin;
newTransformLCS.Origin = XYZ.Zero;
offset = FlipYTrf().Multiply(newTransformLCS);
offset.Origin = orig;
}
else
{
offset = newTransformLCS;
}
}
// Calculate the transformation matrix to tranform the original Axis Curve at its ECS into the new ECS assigned in the offset
curve = curve.CreateTransformed(offset.Inverse.Multiply(axisInfo.LCSAsTransform));
IDictionary <IFCFuzzyXYZ, IFCAnyHandle> cachePoints = new Dictionary <IFCFuzzyXYZ, IFCAnyHandle>();
IFCAnyHandle ifcCurveHnd;
try
{
ifcCurveHnd = GeometryUtil.CreateIFCCurveFromRevitCurve(exporterIFC.GetFile(), exporterIFC, curve, true, cachePoints);
}
catch
{
ifcCurveHnd = GeometryUtil.OutdatedCreateIFCCurveFromRevitCurve(exporterIFC.GetFile(), exporterIFC, curve, true, cachePoints);
}
IList <IFCAnyHandle> axis_items = new List <IFCAnyHandle>();
if (!(IFCAnyHandleUtil.IsNullOrHasNoValue(ifcCurveHnd)))
{
axis_items.Add(ifcCurveHnd);
}
if (axis_items.Count > 0)
{
string identifierOpt = "Axis"; // This is by IFC2x2+ convention.
string representationTypeOpt = "Curve3D"; // This is by IFC2x2+ convention.
IFCAnyHandle axisRep = RepresentationUtil.CreateShapeRepresentation(exporterIFC, element, catId, exporterIFC.Get3DContextHandle(identifierOpt),
identifierOpt, representationTypeOpt, axis_items);
return(axisRep);
}
return(null);
}
/// <summary>
/// Create the handle corresponding to the "Axis" IfcRepresentation for a beam, if possible.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC class.</param>
/// <param name="element">The beam element.</param>
/// <param name="catId">The beam category id.</param>
/// <param name="axisInfo">The optional beam axis information.</param>
/// <param name="offsetTransform">The optional offset transform applied to the "Body" representation.</param>
/// <param name="elevation">The optional level elevation.</param>
/// <returns>The handle, or null if not created.</returns>
private static IFCAnyHandle CreateBeamAxis(ExporterIFC exporterIFC, Element element, ElementId catId, BeamAxisInfo axisInfo, Transform offsetTransform, double elevation)
{
if (axisInfo == null)
{
return(null);
}
Curve curve = axisInfo.Axis;
XYZ projDir = axisInfo.AxisNormal;
Transform lcs = axisInfo.LCSAsTransform;
string representationTypeOpt = "Curve2D"; // This is by IFC2x2+ convention.
XYZ curveOffset = XYZ.Zero;
if (offsetTransform != null)
{
curveOffset = -(offsetTransform.Origin);
curveOffset -= new XYZ(0, 0, elevation);
}
else
{
// Note that we do not have to have any scaling adjustment here, since the curve origin is in the
// same internal coordinate system as the curve.
curveOffset = -lcs.Origin;
}
Transform offsetLCS = new Transform(lcs);
offsetLCS.Origin = XYZ.Zero;
IList <IFCAnyHandle> axis_items = null;
if (ExporterCacheManager.ExportOptionsCache.ExportAs4ReferenceView)
{
IFCAnyHandle axisHnd = GeometryUtil.CreatePolyCurveFromCurve(exporterIFC, curve);
axis_items = new List <IFCAnyHandle>();
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(axisHnd))
{
axis_items.Add(axisHnd);
representationTypeOpt = "Curve3D"; // We use Curve3D for IFC4RV Axis
}
}
else
{
IFCGeometryInfo info = IFCGeometryInfo.CreateCurveGeometryInfo(exporterIFC, offsetLCS, projDir, false);
ExporterIFCUtils.CollectGeometryInfo(exporterIFC, info, curve, curveOffset, true);
axis_items = info.GetCurves();
}
if (axis_items.Count > 0)
{
string identifierOpt = "Axis"; // This is by IFC2x2+ convention.
IFCAnyHandle axisRep = RepresentationUtil.CreateShapeRepresentation(exporterIFC, element, catId, exporterIFC.Get3DContextHandle(identifierOpt),
identifierOpt, representationTypeOpt, axis_items);
return(axisRep);
}
return(null);
}
/// <summary>
/// Create the handle corresponding to the "Axis" IfcRepresentation for a beam, if possible.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC class.</param>
/// <param name="element">The beam element.</param>
/// <param name="catId">The beam category id.</param>
/// <param name="axisInfo">The optional beam axis information.</param>
/// <param name="offsetTransform">The optional offset transform applied to the "Body" representation.</param>
/// <returns>The handle, or null if not created.</returns>
private static IFCAnyHandle CreateBeamAxis(ExporterIFC exporterIFC, Element element, ElementId catId, BeamAxisInfo axisInfo, Transform offsetTransform)
{
if (axisInfo == null)
{
return(null);
}
Curve curve = axisInfo.Axis;
XYZ projDir = axisInfo.AxisNormal;
Transform lcs = axisInfo.LCSAsTransform;
XYZ curveOffset = XYZ.Zero;
if (offsetTransform != null)
{
curveOffset = -UnitUtil.UnscaleLength(offsetTransform.Origin);
}
else
{
// Note that we do not have to have any scaling adjustment here, since the curve origin is in the
// same internal coordinate system as the curve.
curveOffset = -lcs.Origin;
}
Transform offsetLCS = new Transform(lcs);
offsetLCS.Origin = XYZ.Zero;
IFCGeometryInfo info = IFCGeometryInfo.CreateCurveGeometryInfo(exporterIFC, offsetLCS, projDir, false);
ExporterIFCUtils.CollectGeometryInfo(exporterIFC, info, curve, curveOffset, true);
IList <IFCAnyHandle> axis_items = info.GetCurves();
if (axis_items.Count > 0)
{
string identifierOpt = "Axis"; // This is by IFC2x2+ convention.
string representationTypeOpt = "Curve2D"; // This is by IFC2x2+ convention.
IFCAnyHandle axisRep = RepresentationUtil.CreateShapeRepresentation(exporterIFC, element, catId, exporterIFC.Get3DContextHandle(identifierOpt),
identifierOpt, representationTypeOpt, axis_items);
return(axisRep);
}
return(null);
}
/// <summary>
/// Export one IFCGrid in one level.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC object.</param>
/// <param name="levelId">The level ID.</param>
/// <param name="sameDirectionAxesU">The U axes of grids.</param>
/// <param name="sameDirectionAxesV">The V axes of grids.</param>
/// <param name="sameDirectionAxesW">The W axes of grids.</param>
public static void ExportGrid(ExporterIFC exporterIFC, ElementId levelId, string gridName, List <Grid> sameDirectionAxesU, List <Grid> sameDirectionAxesV, List <Grid> sameDirectionAxesW)
{
List <IFCAnyHandle> axesU = null;
List <IFCAnyHandle> axesV = null;
List <IFCAnyHandle> axesW = null;
List <IFCAnyHandle> representations = new List <IFCAnyHandle>();
using (ProductWrapper productWrapper = ProductWrapper.Create(exporterIFC, true))
{
IFCFile ifcFile = exporterIFC.GetFile();
using (IFCTransaction transaction = new IFCTransaction(ifcFile))
{
GridRepresentationData gridRepresentationData = new GridRepresentationData();
axesU = CreateIFCGridAxisAndRepresentations(exporterIFC, productWrapper, sameDirectionAxesU, representations, gridRepresentationData);
axesV = CreateIFCGridAxisAndRepresentations(exporterIFC, productWrapper, sameDirectionAxesV, representations, gridRepresentationData);
if (sameDirectionAxesW != null)
{
axesW = CreateIFCGridAxisAndRepresentations(exporterIFC, productWrapper, sameDirectionAxesW, representations, gridRepresentationData);
}
IFCAnyHandle contextOfItemsFootPrint = exporterIFC.Get3DContextHandle("FootPrint");
string identifierOpt = "FootPrint";
string representationTypeOpt = "GeometricCurveSet";
int numGridsToExport = gridRepresentationData.m_Grids.Count;
if (numGridsToExport == 0)
{
return;
}
bool useIFCCADLayer = !string.IsNullOrWhiteSpace(gridRepresentationData.m_IFCCADLayer);
IFCAnyHandle shapeRepresentation = null;
HashSet <IFCAnyHandle> allCurves = new HashSet <IFCAnyHandle>();
for (int ii = 0; ii < numGridsToExport; ii++)
{
allCurves.UnionWith(gridRepresentationData.m_curveSets[ii]);
}
if (useIFCCADLayer)
{
shapeRepresentation = RepresentationUtil.CreateShapeRepresentation(exporterIFC, contextOfItemsFootPrint,
identifierOpt, representationTypeOpt, allCurves, gridRepresentationData.m_IFCCADLayer);
}
else
{
ElementId catId = CategoryUtil.GetSafeCategoryId(gridRepresentationData.m_Grids[0]);
shapeRepresentation = RepresentationUtil.CreateShapeRepresentation(exporterIFC, gridRepresentationData.m_Grids[0], catId,
contextOfItemsFootPrint, identifierOpt, representationTypeOpt, allCurves);
}
representations.Add(shapeRepresentation);
IFCAnyHandle productRep = IFCInstanceExporter.CreateProductDefinitionShape(ifcFile, null, null, representations);
// We will associate the grid with its level, unless there are no levels in the file, in which case we'll associate it with the building.
IFCLevelInfo levelInfo = ExporterCacheManager.LevelInfoCache.GetLevelInfo(exporterIFC, levelId);
bool useLevelInfo = (levelInfo != null);
string gridGUID = GUIDUtil.CreateGUID();
//// Get the first grid's override name, if cannot find it, use null.
//string gridName = GetGridName(sameDirectionAxesU, sameDirectionAxesV, sameDirectionAxesW);
IFCAnyHandle ownerHistory = ExporterCacheManager.OwnerHistoryHandle;
IFCAnyHandle gridLevelHandle = useLevelInfo ? levelInfo.GetBuildingStorey() : ExporterCacheManager.BuildingHandle;
IFCAnyHandle levelObjectPlacement = IFCAnyHandleUtil.GetObjectPlacement(gridLevelHandle);
double elev = useLevelInfo ? levelInfo.Elevation : 0.0;
double elevation = UnitUtil.ScaleLength(elev);
XYZ orig = new XYZ(0.0, 0.0, elevation);
IFCAnyHandle copyLevelPlacement = ExporterUtil.CopyLocalPlacement(ifcFile, levelObjectPlacement);
IFCAnyHandle ifcGrid = IFCInstanceExporter.CreateGrid(exporterIFC, gridGUID, ownerHistory, gridName, copyLevelPlacement, productRep, axesU, axesV, axesW);
productWrapper.AddElement(null, ifcGrid, levelInfo, null, true, null);
transaction.Commit();
}
}
}
/// <summary>
/// Exports a beam to IFC beam.
/// </summary>
/// <param name="exporterIFC">
/// The ExporterIFC object.
/// </param>
/// <param name="element">
/// The element to be exported.
/// </param>
/// <param name="geometryElement">
/// The geometry element.
/// </param>
/// <param name="productWrapper">
/// The ProductWrapper.
/// </param>
public static void ExportBeam(ExporterIFC exporterIFC,
Element element, GeometryElement geometryElement, ProductWrapper productWrapper)
{
if (geometryElement == null)
{
return;
}
IFCFile file = exporterIFC.GetFile();
double scale = exporterIFC.LinearScale;
using (IFCTransaction transaction = new IFCTransaction(file))
{
LocationCurve locCurve = element.Location as LocationCurve;
Transform orientTrf = Transform.Identity;
bool canExportAxis = (locCurve != null);
IFCAnyHandle axisRep = null;
XYZ beamDirection = null;
XYZ projDir = null;
Curve curve = null;
Plane plane = null;
if (canExportAxis)
{
curve = locCurve.Curve;
if (curve is Line)
{
Line line = curve as Line;
XYZ planeY, planeOrig;
planeOrig = line.get_EndPoint(0);
beamDirection = line.Direction;
if (Math.Abs(beamDirection.Z) < 0.707) // approx 1.0/sqrt(2.0)
{
planeY = XYZ.BasisZ.CrossProduct(beamDirection);
}
else
{
planeY = XYZ.BasisX.CrossProduct(beamDirection);
}
planeY = planeY.Normalize();
projDir = beamDirection.CrossProduct(planeY);
plane = new Plane(beamDirection, planeY, planeOrig);
orientTrf.BasisX = beamDirection; orientTrf.BasisY = planeY; orientTrf.BasisZ = projDir; orientTrf.Origin = planeOrig;
}
else if (curve is Arc)
{
XYZ yDir, center;
Arc arc = curve as Arc;
beamDirection = arc.XDirection; yDir = arc.YDirection; projDir = arc.Normal; center = arc.Center;
plane = new Plane(beamDirection, yDir, center);
orientTrf.BasisX = beamDirection; orientTrf.BasisY = yDir; orientTrf.BasisZ = projDir; orientTrf.Origin = center;
}
else
{
canExportAxis = false;
}
}
using (IFCPlacementSetter setter = IFCPlacementSetter.Create(exporterIFC, element, null, canExportAxis ? orientTrf : null, ExporterUtil.GetBaseLevelIdForElement(element)))
{
IFCAnyHandle localPlacement = setter.GetPlacement();
SolidMeshGeometryInfo solidMeshInfo = GeometryUtil.GetSplitSolidMeshGeometry(geometryElement);
using (IFCExtrusionCreationData extrusionCreationData = new IFCExtrusionCreationData())
{
extrusionCreationData.SetLocalPlacement(localPlacement);
if (canExportAxis && (orientTrf.BasisX != null))
{
extrusionCreationData.CustomAxis = beamDirection;
extrusionCreationData.PossibleExtrusionAxes = IFCExtrusionAxes.TryCustom;
}
else
{
extrusionCreationData.PossibleExtrusionAxes = IFCExtrusionAxes.TryXY;
}
IList <Solid> solids = solidMeshInfo.GetSolids();
IList <Mesh> meshes = solidMeshInfo.GetMeshes();
ElementId catId = CategoryUtil.GetSafeCategoryId(element);
// The representation handle generated from one of the methods below.
IFCAnyHandle repHnd = null;
// The list of materials in the solids or meshes.
ICollection <ElementId> materialIds = new HashSet <ElementId>();
// There may be an offset to make the local coordinate system
// be near the origin. This offset will be used to move the axis to the new LCS.
Transform offsetTransform = null;
// If we have a beam with a Linear location line that only has one solid geometry,
// we will try to use the ExtrusionAnalyzer to generate an extrusion with 0 or more clippings.
// This code is currently limited in that it will not process beams with openings, so we
// use other methods below if this one fails.
if (solids.Count == 1 && meshes.Count == 0 && (canExportAxis && (curve is Line)))
{
bool completelyClipped;
beamDirection = orientTrf.BasisX;
Plane beamExtrusionPlane = new Plane(orientTrf.BasisY, orientTrf.BasisZ, orientTrf.Origin);
repHnd = ExtrusionExporter.CreateExtrusionWithClipping(exporterIFC, element,
catId, solids[0], beamExtrusionPlane, beamDirection, null, out completelyClipped);
if (completelyClipped)
{
return;
}
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(repHnd))
{
// This is used by the BeamSlopeCalculator. This should probably be generated automatically by
// CreateExtrusionWithClipping.
IFCExtrusionBasis bestAxis = (Math.Abs(beamDirection[0]) > Math.Abs(beamDirection[1])) ?
IFCExtrusionBasis.BasisX : IFCExtrusionBasis.BasisY;
extrusionCreationData.Slope = GeometryUtil.GetSimpleExtrusionSlope(beamDirection, bestAxis);
ElementId materialId = BodyExporter.GetBestMaterialIdFromGeometryOrParameter(solids[0], exporterIFC, element);
if (materialId != ElementId.InvalidElementId)
{
materialIds.Add(materialId);
}
}
}
if (IFCAnyHandleUtil.IsNullOrHasNoValue(repHnd))
{
BodyData bodyData = null;
BodyExporterOptions bodyExporterOptions = new BodyExporterOptions(true);
if (solids.Count > 0 || meshes.Count > 0)
{
bodyData = BodyExporter.ExportBody(exporterIFC, element, catId, ElementId.InvalidElementId,
solids, meshes, bodyExporterOptions, extrusionCreationData);
}
else
{
IList <GeometryObject> geomlist = new List <GeometryObject>();
geomlist.Add(geometryElement);
bodyData = BodyExporter.ExportBody(exporterIFC, element, catId, ElementId.InvalidElementId,
geomlist, bodyExporterOptions, extrusionCreationData);
}
repHnd = bodyData.RepresentationHnd;
materialIds = bodyData.MaterialIds;
offsetTransform = bodyData.OffsetTransform;
}
if (IFCAnyHandleUtil.IsNullOrHasNoValue(repHnd))
{
extrusionCreationData.ClearOpenings();
return;
}
IList <IFCAnyHandle> representations = new List <IFCAnyHandle>();
if (canExportAxis)
{
XYZ curveOffset = new XYZ(0, 0, 0);
if (offsetTransform != null)
{
curveOffset = -offsetTransform.Origin / scale;
}
else
{
// Note that we do not have to have any scaling adjustment here, since the curve origin is in the
// same internal coordinate system as the curve.
curveOffset = -plane.Origin;
}
Plane offsetPlane = new Plane(plane.XVec, plane.YVec, XYZ.Zero);
IFCGeometryInfo info = IFCGeometryInfo.CreateCurveGeometryInfo(exporterIFC, offsetPlane, projDir, false);
ExporterIFCUtils.CollectGeometryInfo(exporterIFC, info, curve, curveOffset, true);
IList <IFCAnyHandle> axis_items = info.GetCurves();
if (axis_items.Count > 0)
{
string identifierOpt = "Axis"; // this is by IFC2x2 convention, not temporary
string representationTypeOpt = "Curve2D"; // this is by IFC2x2 convention, not temporary
axisRep = RepresentationUtil.CreateShapeRepresentation(exporterIFC, element, catId, exporterIFC.Get3DContextHandle(identifierOpt),
identifierOpt, representationTypeOpt, axis_items);
representations.Add(axisRep);
}
}
representations.Add(repHnd);
Transform boundingBoxTrf = (offsetTransform == null) ? Transform.Identity : offsetTransform.Inverse;
IFCAnyHandle boundingBoxRep = BoundingBoxExporter.ExportBoundingBox(exporterIFC, geometryElement, boundingBoxTrf);
if (boundingBoxRep != null)
{
representations.Add(boundingBoxRep);
}
IFCAnyHandle prodRep = IFCInstanceExporter.CreateProductDefinitionShape(file, null, null, representations);
string instanceGUID = GUIDUtil.CreateGUID(element);
string instanceName = NamingUtil.GetNameOverride(element, NamingUtil.GetIFCName(element));
string instanceDescription = NamingUtil.GetDescriptionOverride(element, null);
string instanceObjectType = NamingUtil.GetObjectTypeOverride(element, NamingUtil.CreateIFCObjectName(exporterIFC, element));
string instanceTag = NamingUtil.GetTagOverride(element, NamingUtil.CreateIFCElementId(element));
IFCAnyHandle beam = IFCInstanceExporter.CreateBeam(file, instanceGUID, exporterIFC.GetOwnerHistoryHandle(),
instanceName, instanceDescription, instanceObjectType, extrusionCreationData.GetLocalPlacement(), prodRep, instanceTag);
productWrapper.AddElement(element, beam, setter, extrusionCreationData, true);
OpeningUtil.CreateOpeningsIfNecessary(beam, element, extrusionCreationData, offsetTransform, exporterIFC,
extrusionCreationData.GetLocalPlacement(), setter, productWrapper);
FamilyTypeInfo typeInfo = new FamilyTypeInfo();
typeInfo.ScaledDepth = extrusionCreationData.ScaledLength;
typeInfo.ScaledArea = extrusionCreationData.ScaledArea;
typeInfo.ScaledInnerPerimeter = extrusionCreationData.ScaledInnerPerimeter;
typeInfo.ScaledOuterPerimeter = extrusionCreationData.ScaledOuterPerimeter;
PropertyUtil.CreateBeamColumnBaseQuantities(exporterIFC, beam, element, typeInfo);
if (materialIds.Count != 0)
{
CategoryUtil.CreateMaterialAssociations(exporterIFC, beam, materialIds);
}
// Register the beam's IFC handle for later use by truss and beam system export.
ExporterCacheManager.ElementToHandleCache.Register(element.Id, beam);
}
}
transaction.Commit();
}
}
/// <summary>
/// Create the handle corresponding to the "Axis" IfcRepresentation for a beam, if possible.
/// </summary>
/// <param name="exporterIFC">The ExporterIFC class.</param>
/// <param name="element">The beam element.</param>
/// <param name="catId">The beam category id.</param>
/// <param name="axisInfo">The optional beam axis information.</param>
/// <param name="offsetTransform">The optional offset transform applied to the "Body" representation.</param>
/// <returns>The handle, or null if not created.</returns>
private static IFCAnyHandle CreateBeamAxis(ExporterIFC exporterIFC, Element element, ElementId catId, BeamAxisInfo axisInfo, Transform offsetTransform)
{
if (axisInfo == null)
{
return(null);
}
Curve curve = axisInfo.Axis;
XYZ projDir = axisInfo.AxisNormal;
Transform lcs = axisInfo.LCSAsTransform;
string representationTypeOpt = "Curve2D"; // This is by IFC2x2+ convention.
XYZ curveOffset = XYZ.Zero;
if (offsetTransform != null)
{
curveOffset = -UnitUtil.UnscaleLength(offsetTransform.Origin);
}
else
{
// Note that we do not have to have any scaling adjustment here, since the curve origin is in the
// same internal coordinate system as the curve.
curveOffset = -lcs.Origin;
}
Transform offsetLCS = new Transform(lcs);
offsetLCS.Origin = XYZ.Zero;
IList <IFCAnyHandle> axis_items = null;
if (ExporterCacheManager.ExportOptionsCache.ExportAs4ReferenceView)
{
IFCFile file = exporterIFC.GetFile();
IList <int> segmentIndex = null;
IList <IList <double> > pointList = GeometryUtil.PointListFromCurve(exporterIFC, curve, null, null, out segmentIndex);
// For now because of no support in creating IfcLineIndex and IfcArcIndex yet, it is set to null
//IList<IList<int>> segmentIndexList = new List<IList<int>>();
//segmentIndexList.Add(segmentIndex);
IList <IList <int> > segmentIndexList = null;
IFCAnyHandle pointListHnd = IFCInstanceExporter.CreateCartesianPointList3D(file, pointList);
IFCAnyHandle axisHnd = IFCInstanceExporter.CreateIndexedPolyCurve(file, pointListHnd, segmentIndexList, false);
axis_items = new List <IFCAnyHandle>();
if (!IFCAnyHandleUtil.IsNullOrHasNoValue(axisHnd))
{
axis_items.Add(axisHnd);
representationTypeOpt = "Curve3D"; // We use Curve3D for IFC4RV Axis
}
}
else
{
IFCGeometryInfo info = IFCGeometryInfo.CreateCurveGeometryInfo(exporterIFC, offsetLCS, projDir, false);
ExporterIFCUtils.CollectGeometryInfo(exporterIFC, info, curve, curveOffset, true);
axis_items = info.GetCurves();
}
if (axis_items.Count > 0)
{
string identifierOpt = "Axis"; // This is by IFC2x2+ convention.
IFCAnyHandle axisRep = RepresentationUtil.CreateShapeRepresentation(exporterIFC, element, catId, exporterIFC.Get3DContextHandle(identifierOpt),
identifierOpt, representationTypeOpt, axis_items);
return(axisRep);
}
return(null);
}
/// <summary>
/// Exports a roof or floor as a container of multiple roof slabs. Returns the handle, if successful.
/// </summary>
/// <param name="exporterIFC">The exporter.</param>
/// <param name="element">The roof or floor element.</param>
/// <param name="geometry">The geometry of the element.</param>
/// <param name="productWrapper">The product wrapper.</param>
/// <returns>The roof handle.</returns>
/// <remarks>For floors, if there is only one component, return null, as we do not want to create a container.</remarks>
public static IFCAnyHandle ExportRoofOrFloorAsContainer(ExporterIFC exporterIFC,
Element element, GeometryElement geometry, ProductWrapper productWrapper)
{
IFCFile file = exporterIFC.GetFile();
// We support ExtrusionRoofs, FootPrintRoofs, and Floors only.
bool elementIsRoof = (element is ExtrusionRoof) || (element is FootPrintRoof);
bool elementIsFloor = (element is Floor);
if (!elementIsRoof && !elementIsFloor)
{
return(null);
}
string ifcEnumType;
IFCExportInfoPair roofExportType = ExporterUtil.GetExportType(exporterIFC, element, out ifcEnumType);
if (roofExportType.IsUnKnown)
{
IFCEntityType elementClassTypeEnum =
elementIsFloor ? IFCEntityType.IfcSlab: IFCEntityType.IfcRoof;
roofExportType = new IFCExportInfoPair(elementClassTypeEnum, "");
}
// Check the intended IFC entity or type name is in the exclude list specified in the UI
if (ExporterCacheManager.ExportOptionsCache.IsElementInExcludeList(roofExportType.ExportType))
{
return(null);
}
Document doc = element.Document;
using (SubTransaction tempPartTransaction = new SubTransaction(doc))
{
MaterialLayerSetInfo layersetInfo = new MaterialLayerSetInfo(exporterIFC, element, productWrapper);
bool hasLayers = false;
if (layersetInfo.MaterialIds.Count > 1)
{
hasLayers = true;
}
bool exportByComponents = ExporterCacheManager.ExportOptionsCache.ExportAs4ReferenceView && hasLayers;
using (IFCTransaction transaction = new IFCTransaction(file))
{
// Check for containment override
IFCAnyHandle overrideContainerHnd = null;
ElementId overrideContainerId = ParameterUtil.OverrideContainmentParameter(exporterIFC, element, out overrideContainerHnd);
// We want to delay creating entity handles until as late as possible, so that if we abort the IFC transaction,
// we don't have to delete elements. This is both for performance reasons and to potentially extend the number
// of projects that can be exported by reducing (a small amount) of waste.
IList <HostObjectSubcomponentInfo> hostObjectSubcomponents = null;
try
{
hostObjectSubcomponents = ExporterIFCUtils.ComputeSubcomponents(element as HostObject);
}
catch
{
return(null);
}
if (hostObjectSubcomponents == null)
{
return(null);
}
int numSubcomponents = hostObjectSubcomponents.Count;
if (numSubcomponents == 0 || (elementIsFloor && numSubcomponents == 1))
{
return(null);
}
using (PlacementSetter setter = PlacementSetter.Create(exporterIFC, element, null, null, overrideContainerId, overrideContainerHnd))
{
IFCAnyHandle localPlacement = setter.LocalPlacement;
IFCAnyHandle hostObjectHandle = null;
try
{
using (IFCExtrusionCreationData extrusionCreationData = new IFCExtrusionCreationData())
{
IFCAnyHandle ownerHistory = ExporterCacheManager.OwnerHistoryHandle;
extrusionCreationData.SetLocalPlacement(localPlacement);
extrusionCreationData.ReuseLocalPlacement = true;
using (TransformSetter trfSetter = TransformSetter.Create())
{
IList <GeometryObject> geometryList = new List <GeometryObject>();
geometryList.Add(geometry);
trfSetter.InitializeFromBoundingBox(exporterIFC, geometryList, extrusionCreationData);
IFCAnyHandle prodRepHnd = null;
string elementGUID = GUIDUtil.CreateGUID(element);
hostObjectHandle = IFCInstanceExporter.CreateGenericIFCEntity(
roofExportType, exporterIFC, element, elementGUID, ownerHistory,
localPlacement, prodRepHnd);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(hostObjectHandle))
{
return(null);
}
IList <IFCAnyHandle> elementHandles = new List <IFCAnyHandle>();
elementHandles.Add(hostObjectHandle);
// If element is floor, then the profile curve loop of hostObjectSubComponent is computed from the top face of the floor
// else if element is roof, then the profile curve loop is taken from the bottom face of the roof instead
XYZ extrusionDir = elementIsFloor ? new XYZ(0, 0, -1) : new XYZ(0, 0, 1);
ElementId catId = CategoryUtil.GetSafeCategoryId(element);
IList <IFCAnyHandle> slabHandles = new List <IFCAnyHandle>();
IList <CurveLoop> hostObjectOpeningLoops = new List <CurveLoop>();
double maximumScaledDepth = 0.0;
using (IFCExtrusionCreationData slabExtrusionCreationData = new IFCExtrusionCreationData())
{
slabExtrusionCreationData.SetLocalPlacement(extrusionCreationData.GetLocalPlacement());
slabExtrusionCreationData.ReuseLocalPlacement = false;
slabExtrusionCreationData.ForceOffset = true;
int loopNum = 0;
int subElementStart = elementIsRoof ? (int)IFCRoofSubElements.RoofSlabStart : (int)IFCSlabSubElements.SubSlabStart;
string subSlabType = roofExportType.ValidatedPredefinedType;
foreach (HostObjectSubcomponentInfo hostObjectSubcomponent in hostObjectSubcomponents)
{
trfSetter.InitializeFromBoundingBox(exporterIFC, geometryList, slabExtrusionCreationData);
Plane plane = hostObjectSubcomponent.GetPlane();
Transform lcs = GeometryUtil.CreateTransformFromPlane(plane);
IList <CurveLoop> curveLoops = new List <CurveLoop>();
CurveLoop slabCurveLoop = hostObjectSubcomponent.GetCurveLoop();
curveLoops.Add(slabCurveLoop);
double slope = Math.Abs(plane.Normal.Z);
double scaledDepth = UnitUtil.ScaleLength(hostObjectSubcomponent.Depth);
double scaledExtrusionDepth = scaledDepth * slope;
IList <IFCAnyHandle> shapeReps = new List <IFCAnyHandle>();
IFCAnyHandle repHnd = IFCInstanceExporter.CreateProductDefinitionShape(file, null, null, shapeReps);
string shapeIdent = "Body";
IFCAnyHandle contextOfItems = exporterIFC.Get3DContextHandle(shapeIdent);
string representationType = ShapeRepresentationType.SweptSolid.ToString();
// Create representation items based on the layers
// Because in this case, the Roof components are not derived from Parts, but by "splitting" geometry part that can be extruded,
// the creation of the Items for IFC4RV will be different by using "manual" split based on the layer thickness
HashSet <IFCAnyHandle> bodyItems = new HashSet <IFCAnyHandle>();
if (!exportByComponents)
{
IFCAnyHandle itemShapeRep = ExtrusionExporter.CreateExtrudedSolidFromCurveLoop(exporterIFC, null, curveLoops, lcs, extrusionDir, scaledExtrusionDepth, false);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(itemShapeRep))
{
productWrapper.ClearInternalHandleWrapperData(element);
return(null);
}
ElementId matId = HostObjectExporter.GetFirstLayerMaterialId(element as HostObject);
BodyExporter.CreateSurfaceStyleForRepItem(exporterIFC, element.Document, itemShapeRep, matId);
bodyItems.Add(itemShapeRep);
}
else
{
double scaleProj = extrusionDir.DotProduct(plane.Normal);
foreach (Tuple <ElementId, string, double> matLayerInfo in layersetInfo.MaterialIds)
{
double itemExtrDepth = matLayerInfo.Item3;
IFCAnyHandle itemShapeRep = ExtrusionExporter.CreateExtrudedSolidFromCurveLoop(exporterIFC, null, curveLoops, lcs, extrusionDir, itemExtrDepth, false);
if (IFCAnyHandleUtil.IsNullOrHasNoValue(itemShapeRep))
{
productWrapper.ClearInternalHandleWrapperData(element);
return(null);
}
//ElementId matId = HostObjectExporter.GetFirstLayerMaterialId(element as HostObject);
BodyExporter.CreateSurfaceStyleForRepItem(exporterIFC, element.Document, itemShapeRep, matLayerInfo.Item1);
bodyItems.Add(itemShapeRep);
IFCAnyHandle representationOfItem = RepresentationUtil.CreateShapeRepresentation(exporterIFC, element, catId, contextOfItems, shapeIdent,
representationType, new HashSet <IFCAnyHandle>()
{
itemShapeRep
});
IFCAnyHandle shapeAspect = IFCInstanceExporter.CreateShapeAspect(file, new List <IFCAnyHandle>()
{
representationOfItem
}, matLayerInfo.Item2, null, null, repHnd);
XYZ offset = new XYZ(0, 0, itemExtrDepth / scaleProj); // offset is calculated as extent in the direction of extrusion
lcs.Origin += offset;
}
}
IFCAnyHandle shapeRep = RepresentationUtil.CreateSweptSolidRep(exporterIFC, element, catId, exporterIFC.Get3DContextHandle("Body"), bodyItems, null);
shapeReps.Add(shapeRep);
IFCAnyHandleUtil.SetAttribute(repHnd, "Representations", shapeReps);
// Allow support for up to 256 named IfcSlab components, as defined in IFCSubElementEnums.cs.
string slabGUID = (loopNum < 256) ? GUIDUtil.CreateSubElementGUID(element, subElementStart + loopNum) : GUIDUtil.CreateGUID();
IFCAnyHandle slabPlacement = ExporterUtil.CreateLocalPlacement(file, slabExtrusionCreationData.GetLocalPlacement(), null);
IFCAnyHandle slabHnd = IFCInstanceExporter.CreateSlab(exporterIFC, element, slabGUID, ownerHistory,
slabPlacement, repHnd, subSlabType);
IFCExportInfoPair exportType = new IFCExportInfoPair(IFCEntityType.IfcSlab, subSlabType);
//slab quantities
slabExtrusionCreationData.ScaledLength = scaledExtrusionDepth;
slabExtrusionCreationData.ScaledArea = UnitUtil.ScaleArea(UnitUtil.ScaleArea(hostObjectSubcomponent.AreaOfCurveLoop));
slabExtrusionCreationData.ScaledOuterPerimeter = UnitUtil.ScaleLength(curveLoops[0].GetExactLength());
slabExtrusionCreationData.Slope = UnitUtil.ScaleAngle(MathUtil.SafeAcos(Math.Abs(slope)));
IFCExportInfoPair slabRoofExportType = new IFCExportInfoPair(IFCEntityType.IfcSlab, slabRoofPredefinedType);
productWrapper.AddElement(null, slabHnd, setter, slabExtrusionCreationData, false, slabRoofExportType);
// Create type
IFCAnyHandle slabRoofTypeHnd = ExporterUtil.CreateGenericTypeFromElement(element, slabRoofExportType, exporterIFC.GetFile(), ownerHistory, slabRoofPredefinedType, productWrapper);
ExporterCacheManager.TypeRelationsCache.Add(slabRoofTypeHnd, slabHnd);
elementHandles.Add(slabHnd);
slabHandles.Add(slabHnd);
hostObjectOpeningLoops.Add(slabCurveLoop);
maximumScaledDepth = Math.Max(maximumScaledDepth, scaledDepth);
loopNum++;
ExporterUtil.AddIntoComplexPropertyCache(slabHnd, layersetInfo);
// Create material association here
if (layersetInfo != null && !IFCAnyHandleUtil.IsNullOrHasNoValue(layersetInfo.MaterialLayerSetHandle))
{
CategoryUtil.CreateMaterialAssociation(exporterIFC, slabHnd, layersetInfo.MaterialLayerSetHandle);
}
}
}
productWrapper.AddElement(element, hostObjectHandle, setter, extrusionCreationData, true, roofExportType);
ExporterUtil.RelateObjects(exporterIFC, null, hostObjectHandle, slabHandles);
OpeningUtil.AddOpeningsToElement(exporterIFC, elementHandles, hostObjectOpeningLoops, element, null, maximumScaledDepth,
null, setter, localPlacement, productWrapper);
transaction.Commit();
return(hostObjectHandle);
}
}
}
catch
{
// SOmething wrong with the above process, unable to create the extrusion data. Reset any internal handles that may have been partially created since they are not committed
productWrapper.ClearInternalHandleWrapperData(element);
return(null);
}
finally
{
exporterIFC.ClearFaceWithElementHandleMap();
}
}
}
}
}