Ifcopenshell converter. 0-or-later) C++ software library for working with the Industry Foundation Classes (IFC) file format. Different conversions are available with IfcConvert (part of IfcOpenShell) and detailed in IfcConvert - Usage. This crash course guides you through basic code snippets that give you a general idea of the low-level functionality that IfcOpenShell-python provides. Clash detection, model comparison, and conversion to over 10 other formats. ifc everything seemed to be at the right place but was it really ? When you use BIM in your project coordinates is always a subject to correctly discuss. Geometry creation ¶ Walls, doors, slabs, and other physical products in IFC can be represented with 2D or 3D geometry. unit_scale = ifcopenshell. Opening and viewing an IFC file Just like the other example, the Qt pythonOCC display is shown and an IFC model is read. In addition to a C++ and Python API, IfcOpenShell comes with an ecosystem of tools, notably including IfcConvert (an application to convert IFC models to other formats), Bonsai (an add-on to Blender providing a graphical IFC authoring IfcOpenShell 0. Install Bonsai by following the Bonsai installation documentation. Compiling from source is recommended for developers actively working with the C++ core. ifc file over the IfcConvert executable to convert it IfcOpenShell IfcConvert 0. This means it is possible for you to manually browse through the Representation attribute of IFC elements, and parse the corresponding IFC shape representations yourself instead of using generic geometric processing such as Individual processing and the Geometry iterator. Packaged installation is IfcOpenShell 0. Sep 13, 2025 · This document covers the IfcConvert command-line utility, a standalone application that converts IFC files into various geometric and data export formats. Introduction ¶ IfcOpenShell is an open source software library for software developers and BIM powerusers working with Industry Foundation Classes (IFC). 4 documentation Main: Introduction IfcOpenShell IfcOpenShell-Python IfcConvert Bonsai Utilities: BCF BIMServer-Plugin BIMTester bSDD Ifc2CA Ifc4D Ifc5D IfcCityJSON IfcClash IfcCSV IfcDiff IfcFM IfcMax IfcPatch IfcSverchok IfcTester Other utilities API: C++ API Reference Python API Reference Indices and tables IfcOpenShell is also used extensively in academia, both in education for students to familiarize themselves with the exchange format and computational geometry approaches and research, as a rapid development platform to test novel ideas. IfcOpenShell is an open source (LGPL-3. util. 1) Usage: IfcConvert [options] <input. ifc> [<output>] Converts (the geometry in) an IFC file into one of the following formats: . As there is no API documentation as of writing, these code examples give an introduction demo to how to read IFC files. igs To my knowledge, there is no robust conversion utility available in both the proprietary and FOSS worlds that do IFC2X3<->IFC4. If you’re reading this, we assume you already know IFC and just want to quickly get started with IfcOpenShell. Perform geometric analysis through BVH trees, voxels, and 2D drawing generation. IFC is the ISO standard format for storing BIM data. IfcOpenShell uses Open CASCADE (the Open CASCADE Community Edition) internally to convert the implicit geometry in IFC files into explicit geometry that any software CAD or modelling package can understand. Pre-built packages is recommended for users wanting to use the latest IfcOpenShell builds. 5. dae Collada Digital Assets Exchange . obj WaveFront OBJ (a . Most commonly, this geometry is created using graphical frontends, like Bonsai. IfcOpenShell IfcConvert 0. It is an open source (LGPL) software library and tookit available in both C++ and Python. Based on the OpenCASCADE geometry kernel, IfcOpenShell C++ offers multicore conversion of implicit IFC geometry into explicit polygons for use in CAD systems. This includes: Collada (. The interactive session below shows how with this setting enabled you will get a default generated material from the IFC element entity type and material indices Bonsai ¶ Bonsai lets you analyse, create, and modify OpenBIM with Blender. IfcConvert is a command-line application for converting IFC geometry into file formats such as OBJ, DAE, GLB, STP, IGS, XML, SVG, H5, TTL/WKT, and IFC-SPF itself. glb glTF Binary glTF v2. 8 depends on fairly recent OCCT additions such as the BVH Tree functionality. 0-dev Usage: IfcConvert [options] <input. Download and compile the sources of IfcOpenShell Usage You can invoke IfcConvert from the command line or drag an . Extensive geometric support is implemented for the IFC releases IFC2x3 TC1 and IFC4 Add2 TC1. IfcOpenShell solves the problem of enabling the extraction, manipulation, and analysis of Building Information Modeling (BIM) data from Industry Foundation Classes (IFC) files. IfcOpenShell The open source IFC toolkit and geometry engine IfcOpenShell helps you develop digital platforms for the built environment. Generate and annotate 2D drawings from 3D geometry with ease. 1-c49ca69 (OCC 7. stp STEP Standard for the Exchange of Product Data . IfcOpenShell ¶ IfcOpenShell C++ Class Hierarchy File Hierarchy Full API Namespaces Classes and Structs Enums Functions Variables Defines Typedefs ifcopenshell-python documentation Parse ifc Create geom from ifc representation Display geom using pythonOCC Ifc importer for Blender Ifc importer for 3ds Max Convert geometry to many formats Some projects using IfcOpenShell : FreeCAD : parametric CAD modeler including a BIM workbench BIMserver : Multi-user self-hostable BIM platform with a plugin ecosystem to view, analyse This means you don’t need to install Python first, and you also can compare your IfcOpenShell scripting to what you see with a visual model viewer, or use a graphical interface to access the IfcOpenShell utilities. IfcOpenShell is written in C++, but has an extensive Python API. 0 . IfcOpenShell – Placement In previous article we used IfcOpenShell’s (IOS) to read an ifc geometry and convert it to a brep. . IfcOpenShell allows you to use Python to query and parse IFC files to extract and analyse data. The tool serves as both a practical conversion utility and a comprehensive example of how to use the IfcOpenShell C++ libraries programmatically. This module provides primitive functions to interact with IFC, including: The format is commonly used for Building Information Modelling. IfcOpenShell is an open source (LGPL) software library for working with Industry Foundation Classes (IFC). Preserve drawing semantics and link model data to and from drawing symbols. In addition to a C++ and Python API, IfcOpenShell comes with an ecosystem of tools, including libraries and CLI apps for ifcopenshell ¶ Welcome to IfcOpenShell! IfcOpenShell provides a way to read and write IFCs. ifc files and more. This means that there is no IfcStyledItem associated to the representation items and that the element does not have an IfcMaterial association with IfcMaterialRepresentation from which we can derive a style (colour) for the element. glb). IfcOpenShell can create and edit geometry with code. For more information, visit the Bonsai website. Please note that IfcOpenShell is a work in progress. glTF (. When we read wikilab. 3D models of buildings, bridges, monuments can be imported in KML (Key Markup Language) with the COLLADA interchange file format. 8. 04 are advised to manually compile and install OCCT 7. ifc> [<output>] Converts the geometry in an IFC file into one of the following formats: Convert parametric geometry into explicit geometry for any CAD system from booleans to complex sweeps. Dec 19, 2025 · In addition to a C++ and Python API, IfcOpenShell comes with an ecosystem of tools, notably including IfcConvert (an application to convert IFC models to other formats), Bonsai (an add-on to Blender providing a graphical IFC authoring platform), and many other libraries, CLI apps, and more. Docker is recommended for developers using Docker. Read, write, and modify Building Information Models using IFC, a diverse digital language from design to construction and beyond. Extending with support for arbitrary IFC schemas is possible at compile-time when using C++ and at run-time when using Python. import ifcopenshell. 7. calculate_unit_scale(model) # Convert to SI unit: si_meters = ifc_project_length * unit_scale # Convert from SI unit: ifc_project_length = si_meters / unit_scale This example builds upon some of the concepts in "Using IfcOpenShell and pythonOCC to construct new geometry" and uses the same model of a simple house, called IfcOpenHouse. IfcOpenShell can open IFC files, read entities (such as walls, buildings, properties, systems, etc), edit attributes, write out . For other formats, you may use other IfcOpenShell utilities as shown in the table below. This means the model can be displayed on Google Earth or Cesium. unit. unit # Note: ifc_project_length is a value you have extracted from the project, # just as from a quantity set. Complete parsing support is provided for IFC2x3 TC1, IFC4 Add2 TC1, IFC4x1, IFC4x2, and IFC4x3 Add2. Users on Ubuntu 20. mtl file is also created) . In addition to a C++ and Python API, IfcOpenShell comes with an ecosystem of tools, notably including IfcConvert (an application to convert IFC models to other formats), Bonsai (an add-on to Blender providing a graphical IFC authoring platform), and many other libraries, CLI apps, and more. In addition to a C++ and Python API, IfcOpenShell comes with an ecosystem of tools, notably including IfcConvert (an application to convert IFC models to other formats), the BlenderBIM Add-on (an add-on to Blender providing a graphical IFC authoring platform), and many other libraries, CLI apps, and more. Installation ¶ There are different methods of installation, depending on your situation. In that matter I recommend In addition to a C++ and Python API, IfcOpenShell comes with an ecosystem of tools, notably including IfcConvert (an application to convert IFC models to other formats), the BlenderBIM Add-on (an add-on to Blender providing a graphical IFC authoring platform), and many other libraries, CLI apps, and more. dae). Launch Blender. Manual parsing ¶ IfcOpenShell lets you traverse any IFC entity graph. IfcOpenShell C++ offers classes and functions to read, write, and modify all IFC schemas, serialisations, and geometry. 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