![]() If using IfcOpenShell v0.6 or higher, the IFC version specified in the Arch preferences will be used. ![]() IFC files are exported as IFC2x3 or IFC4 depending on your version of IfcOpenShell, which can be compiled with any of the IFC schemas. Objects that are not Arch objects are exported as IfcBuildingElementProxy. Their IfcProperties are exported as well, and if these objects have an IFC UID from a previous import, the same UID will be kept at export. Arch objects will be exported with the type set in their "IFC Type" property. To export a whole site or building or a whole floor or a group containing other objects, it is only needed to select that building or floor or group. Arch References will currently export as IfcBuildingElementProxies. The only not fully supported objects, at the moment, are PartDesign Bodies, Std Parts, and new structures such as App Links and LinkGroups, so you will need a bit of testing if using them. All Arch/BIM objects are supported, as well as other objects created in other workbenches. Note: The BIM Workbench features an IFC explorer tool that allows you to open an IFC file in fast, text-only mode, and import only the parts you wish.Įxporting to IFC files will export all the selected objects and their descendants. are easily obtainable for each object.Įnabling the show debug messages in the IFC preferences settings will print a report indicating if any object from the IFC file failed to import. However, since the geometry is fully recreated in FreeCAD, most of the quantities such as length, area, etc. Quantities specified in the IFC file are NOT imported. IfcAnnotation objects are also imported, as well as linear and curve-based IfcStructuralItem-based entities. having groups inside storeys or storeys inside groups. Group structures (using IfcGroups) are also imported and rendered in FreeCAD, and can be combined with building structures, for ex. If using an import mode that uses Arch objects, being parametric or not, all objects will carry the full set of IfcProperties attached to each object, grouped by Property Set.īuilding structures such as Sites, Buildings and Storeys are also faithfully imported and the structure is correctly recreated in FreeCAD. All other entities needed by one of these objects, such as profiles of extrusion, or components of boolean operations, will be imported as required. The IFC importer starts by importing all IFC entities derived from IfcProduct, that is, basically, all the objects that compose a building, such as walls or windows or pipes. IfcOpenShell supports all IFC2x3 and IFC4 entities (IFC4-add1 and IFC4-add2 are being implemented in v0.6 and might be available by the time you read this) but not all of them can be converted to Arch objects, those that can't will be imported as simple Part shapes. Typically, if you try to open a large file and FreeCAD takes too long to import it, try with a lower import mode. A last type allows to discard entirely the importing of Arch objects, which is useful for structural analytic models. one Part shape per floor, one all-in-one object, just for referenceĮach of these types loses some information over the previous one, but is lighter on resources, which allows to open bigger files.non-parametric Part shapes, the geometry will be faithfully rendered but IFC information will be discarded.non-parametric Arch objects, objects will carry IFC information and properties but will not be editable. ![]() full parametric Arch objects, the geometry will, as much as possible, be editable in FreeCAD. ![]() The IFC preferences settings allow you to set how the IFC objects are imported: This legacy module is still included in the source code but as of v0.19 it is not recommended at all it will only be able to import a very small subset of IFC objects, and should be considered completely obsolete.Īll IfcProduct-based entities from IFC2x3 or IFC4 files will be imported into the FreeCAD document. Note 2: in the past (2013) the Arch Workbench used to feature a simpler IFC importer that didn't depend on IfcOpenShell. Note: the BIM Setup tool will look for IfcOpenShell too, and issue a notification if it is not installed. Otherwise, you will need to install IfcOpenShell yourself read the IfcOpenShell page to learn more about this process. If no error message appears, IfcOpenShell is installed, and you may proceed with importing IFC files. ![]()
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