Industry Foundation Classes (IFC) Geometry Support

See Also

Note IFC does not require specific geometry types for a given element type. Any FME geometry can be written as the geometry for a given element.

Geometry	Supported?	Notes
Aggregate	Yes
Arc	Yes
Box	Yes
BRep Solid	Yes
Clothoid	Yes
Composite Solid	Yes
Composite Surface	Yes	Solids that cannot be represented natively as solids by FME will be read as composite surfaces instead.
Coordinate Precision	Yes
CSG Solid	Yes	Swept area solids with openings are read as CSG solids if the Subtract Opening Geometry parameter is enabled. Ifc CSGs are supported for reading, but not writing. CSGs that do not represent a solid and its openings will be written out as an IfcFacetedBrep element.
Donut	Yes
Ellipse	Yes
Extrusion	Yes
Face	Yes
Geometry Definitions and Instances	Yes	IfcMappedItem elements are read as geometry instances; conversely, geometry instances are written out as IfcMappedItem elements.
Georeferencing	Native
Hierarchical Geometries	Yes
Homogeneous Aggregates	Yes
Line	Yes
Measures	Yes
Mesh	Yes	Meshes will be written out as IfcFacetedBrep elements.
MultiArea	Yes
MultiCurve	Yes
Multiple Geometries	Yes
MultiPoint	Yes
MultiSolid	Yes
MultiSurface	Yes
MultiText	Yes
Null	Yes
Oriented Arc	Yes
Path	Yes
Point Cloud	Yes
Point	Yes
Polygon	Yes
Raster	No
Rectangle Face	Yes
Surface Normals	Yes
Surface Sidedness	No
Text	Yes
Textures	Partially	IfcSurfaceStyleWithTextures attributes can be round-tripped through FME; however, the textures themselves cannot be viewed in the FME Data Inspector.
Traits	No
Triangle Fan	Yes
Triangle Strip	Yes
Z values	Yes