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2026 Class
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C

ExporterIFCUtils

Description:
A class that contains utilities needed to implement Revit's version of the IFC export client application.
Remarks:
This class contains special API utilities needed to enable the implementation of the client application for IFC export. Some of these utilities will be needed temporarily while the code for IFC export is migrated into the export client. These temporary interfaces are likely to change in upcoming Revit releases.
Inheritance Hierarchy:
System.Object
  Autodesk.Revit.DB.IFC.ExporterIFCUtils
public static class ExporterIFCUtils
Name Return Type Description
M AddClippingsToBaseExtrusion(ExporterIFC, Wall, XYZ, IFCRange, IFCRange, IFCAnyHandle, IList<IFCExtrusionData>) IFCAnyHandle
M AddValueString(Element, ElementId, String) None Adds a string value to a built-in parameter.
M AreSolidsEqual(Solid, Solid, Transform%) Boolean Determines whether two solids are identical, potentially offset from each other.
M CanExportWallGeometryAsExtrusion(Element, IFCRange, Curve) Boolean Identifies if the base geometry of the wall can be represented as an extrusion.
M CollectGeometryInfo(ExporterIFC, IFCGeometryInfo, GeometryObject, XYZ, Boolean) None Collects all the target geometry from the input geometry object and adds it as IFC handles to the IFCInfo.
M CollectGeometryInfo(ExporterIFC, IFCGeometryInfo, GeometryObject, XYZ, Boolean, Transform) None Collects all the target geometry from the input geometry object and adds it as IFC handles to the IFCInfo.
M ComputeAreaOfCurveLoops(IList<CurveLoop>) Double
M ComputeRoofProjectedArea(Element) Double Returns the projected area of the room, unscaled.
M ComputeSubcomponents(HostObject) IList<HostObjectSubcomponentInfo> Splits a roof or floor element composed of planar surfaces into a set of roughly vertical extruded loops of uniform depth if possible.
M CreateAlternateGUID(Element) String Creates a GUID for the given element.
M CreateGUID() String Creates a randomized GUID.
M CreateProjectLevelGUID(Document, IFCProjectLevelGUIDType) String Creates a GUID from Revit project for given GUIDType.
M CreateSubElementGUID(Element, Int32) String Creates a consistent GUID for an IFC entity related to a Revit element. A "related" sub-element is one that is unique for a given type of element, and can therefore by identified by a simple index value (e.g. PSet_Wall_Common property set for a wall.) The index value 0 is reserved, as this would generate the GUID of the element itself. A listing of known sub-elements is contained in IFCSubElementEnums.cs; it is expected that this list would be maintained up-to-date, instead of passing arbitrary values into this function.
M EndExportInternal(ExporterIFC) None Use the internal Revit implementation to relate elements at the end of export.
M ExportExtrudedSlabOpenings(ExporterIFC, Element, IFCLevelInfo, IFCAnyHandle, IList<IFCAnyHandle>, IList<IList<CurveLoop>>, Plane, IFCProductWrapper) None
M ExportSlabAsExtrusion(ExporterIFC, Element, GeometryElement, IFCTransformSetter, IFCAnyHandle, IList<IFCAnyHandle>, IList<IFCAnyHandle>, IList<IList<CurveLoop>>, IList<IFCExtrusionCreationData>, Plane) Boolean
M GetAttachedColumns(Wall) IList<FamilyInstance> Obtains a list of columns known to Revit as intersecting with this wall.
M GetConnectedWalls(Wall, IFCConnectedWallDataLocation) IList<IFCConnectedWallData> Obtains the IFC-specific information regarding the connections between this wall and other elements.
M GetDoor2DArcsFromFamily(Family) IList<Arc> Gets the arcs associated with the plan view of a door.
M GetElevationProfile(Wall) IList<CurveLoop> Obtains the curve loops which bound the wall's elevation profile.
M GetGeometryFromInplaceWall(FamilyInstance) GeometryElement Obtains a special snapshot of the geometry of an in-place wall element suitable for export.
M GetGlobal2DDirectionHandles(Boolean) IList<IFCAnyHandle> Obtains the handles representing the cardinal directions in 2D.
M GetGlobal2DOriginHandle() IFCAnyHandle Obtains the handle representing the 2D origin.
M GetGlobal3DDirectionHandles(Boolean) IList<IFCAnyHandle> Obtains the handles representing the cardinal directions in 3D.
M GetGlobal3DOriginHandle() IFCAnyHandle Obtains the handle representing the 3D origin.
M GetInstanceCutoutFromWall(Document, Wall, FamilyInstance, XYZ%) CurveLoop Gets the curve loop corresponding to the hole in the wall made by the instance.
M GetLegacyCurtainSubElements(Element) ICollection<ElementId> Gets the sub elements from a legacy curtain element.
M GetLegacyStairOrRampComponents(ExporterIFC, Element) IFCLegacyStairOrRamp Gets the components of a stair or ramp.
M GetLegacyStairsProperties(ExporterIFC, Element, Int32%, Int32%, Double%, Double%, Double%, Double%, Double%) None Returns one or more properties for legacy (created in R2012 or before) Stairs.
M GetLevelIdByHeight(ExporterIFC, Element) ElementId Gets the level if by the height of the element.
M GetLoopsFromTopBottomFace(ExporterIFC, Wall) IList<CurveLoop> Gets the curve loop(s) that represent the bottom or top face of the wall, usable to create an extrusion for the wall geometry.
M GetMinSymbolHeight(FamilySymbol) Double Obtains the minimum height of the given FamilySymbol.
M GetMinSymbolWidth(FamilySymbol) Double Obtains the minimum width of the given FamilySymbol.
M GetNumBuildingStoreys(ExporterIFC) Int32 Obsolete. Returns the number of non-empty, non-duplicate building stories in the file.
M GetOpeningData(ExporterIFC, Element, Transform, IFCRange) IList<IFCOpeningData> Gets the openings data from the element.
M GetOriginalSymbol(FamilyInstance) FamilySymbol Returns the original family symbol of this family instance, before the instance is modified by joins, cuts, coping, extensions, or other post-processing.
M GetRelativeLocalPlacementOffsetTransform(IFCAnyHandle, IFCAnyHandle) Transform Obtains the relative transform between two IfcLocalPlacement handles.
M GetRoofComponents(ExporterIFC, RoofBase) RoofComponents Gets the components of roof slabs.
M GetRoomBoundaryAsCurveLoopArray(SpatialElement, SpatialElementBoundaryOptions, Boolean) IList<CurveLoop> Obtains the spatial element boundary curves as an array of CurveLoops, needed for processing into IFC-specific elements later.
M GetTransformForDoorOrWindow(FamilyInstance, FamilySymbol, Boolean, Boolean) Transform Obtains the transform for the door or window instance.
M GetUnscaledTransform(ExporterIFC, IFCAnyHandle) Transform Obtains the unscaled transform from an IfcLocalPlacement handle.
M GetUnscaledTransformWithoutFixOfDirection(ExporterIFC, IFCAnyHandle) Transform Obtains the unscaled transform from an IfcLocalPlacement handle without fix of direction.
M GetWallBaseOffset(Wall) Double Obtains the base offset of the wall.
M GetWallTrimmedCurve(Wall) Curve Obtains the curve of the wall trimmed or extended according to the end conditions of the wall.
M HasElevationProfile(Wall) Boolean Identifies if the wall has a sketched elevation profile.
M IsCurveFromOtherElementSketch(CurveElement) Boolean Identifies if the given curve element is generated by another element's sketch, or if it represents an independent curve element accessible directly by the user.
M IsCurveLoopConvexWithOpenings(CurveLoop, Wall, IFCRange, Boolean%) Boolean Checks if the region bounded by the input curve loop can be represented as the subtraction of 0 or more convex polygons from a base convex polygon.
M IsWallBaseRectangular(Wall, Curve) Boolean Identifies if the wall's base can be represented by a direct thickening of the wall's base curve.
M IsWallCompletelyClipped(Wall, ExporterIFC, IFCRange) Boolean Determines if the input wall is completely removed by interaction with other elements within the given range.
M IsWallJoinedToTop(Wall) Boolean Checks if wall is joined to top.
M SetGlobal2DDirectionHandles(Boolean, IFCAnyHandle, IFCAnyHandle) None Sets the handles representing the cardinal directions in 2D.
M SetGlobal2DOriginHandle(IFCAnyHandle) None Sets the handle representing the 2D origin.
M SetGlobal3DDirectionHandles(Boolean, IFCAnyHandle, IFCAnyHandle, IFCAnyHandle) None Sets the handles representing the cardinal directions in 3D.
M SetGlobal3DOriginHandle(IFCAnyHandle) None Sets the handle representing the 3D origin.
M SortCurveLoops(IList<CurveLoop>) IList<IList<CurveLoop>>
M TransformAndScalePoint(ExporterIFC, XYZ) XYZ Converts a point from global Revit coordinates to current IFC coordinates, including scale.
M TransformAndScaleVector(ExporterIFC, XYZ) XYZ Converts a vector from global Revit coordinates to current IFC coordinates, including scale.
M UsesInstanceGeometry(FamilyInstance) Boolean Identifies if the family instance has its own geometry, or uses the symbol's geometry with a transform.
M ValidateCurveLoops(IList<CurveLoop>, XYZ) IList<CurveLoop>