As an early release (still a little rough around the edges), this repo has been created to allow students to get familiar with ifcopenshell without any knowledge. Its zero-setup running Jupyter-notebooks on binder.

to launch now click this:

Some of the features are: Interactive viewer

a viewer adapted from OCCJupyterViewer added with
two-directional-selection viewer <-> model
section sliders for sections
attribute value lister
set and get colors
graph visualization of the scene graph
integrated IFC documentation

There are many more examples, quizzes and task in the German version that is part of a mandatory 4th term class for 250 architecture students at the RWTH Aachen that will be migrated over time. We are very open and happy about suggestions, issues, PRs and feedback!

TODOs:

more explantory text
English verion of slides with RISE to be used in lectures
move viewer to SideCar (was not possible in the RWTH-Jupyter-Cluster yet)

I will be applying for some more funding to extend this into a good Open Educational Resource (OER) book from provincial sources in NRW/Germany, very open for collaboration ...

Importing Part module in ifcOpenShell-python

Devang Chauhan

2021-10-11 12:20

Comments

Importing Part module from FreeCAD in python

I was looking for a way to extract BREP (Boundary representation) from IFC and I stumbled upon this article. In the article, you'll see that Cyril uses the Part module of FreeCAD. This post shows you how you can import the Part module in Python.

Calculate Differences of IFC files with Hashing

Johan Luttun

2020-09-28 14:56

Comments

Purpose¶

The goal of this tutorial is to learn how to asses whether 2 successively exported IFC building models are different by testing whether entity instances of the latest are present in the original one or entity instances of the original one are present in the latest version.

The data is stored using the Industry Foundation Class (IFC) format, which is the standard format to digitally represent anything related to the construction industry. This format stands as an open-standard, and enables to share building models in form of IFC files between the different actors of a construction project. We can think of IFC as the PDF for the construction industry.

For example, how could you find the difference between those 2 files?

IfcOpenShell Optimizer tutorial

Johan Luttun

2020-09-28 14:56

Comments

Purpose¶

The goal of this tutorial is to reduce the size of an IFC file. Indeed, IFC files can become rather large and processing them can lead to expensive computational costs. Most of the time, this important size is due to duplicate entity instances. In this tutorial, we're going to see how to create a newly optimized file which doesn't contain those instances.

Understanding placements in IFC using IfcOpenShell and FreeCAD

Cyril Waechter

2019-08-13 09:42

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IfcOpenShell – Placement

In previous article we used IfcOpenShell’s (IOS) to read an ifc geometry and convert it to a brep. When we read wikilab.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. In that matter I recommend...

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Read geometry as Boundary Representation in FreeCAD

Cyril Waechter

2019-08-01 10:56

Comments

IfcOpenShell – Read geom as brep

IfcOpenShell version used : 0.6.0a1

In previous article we used IfcOpenShell’s (IOS) standard settings to read an ifc geometry which was generating a mesh. To generate something else let’s take a look at available settings. If your IDE provide you a good auto-completion you are able to see what options you have but not their ...

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Read IFC geometry as triangle meshes in FreeCAD

Cyril Waechter

2019-07-28 09:00

Comments

IfcOpenShell – Read geom as mesh

IfcOpenShell is a library used to work with IFC schema. This library is licensed under LGPL 3.0 (libre and open source). Some features included : 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...

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Using IfcOpenShell to parse IFC files with Python

Dion Moult

2019-02-12 11:14

Comments

IFC is the ISO standard format for storing BIM data. IfcOpenShell is a project that has a Python library that allows you to parse IFC files...

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Using IfcOpenShell and C++ to generate Alignments through the IFC 4x1 schema

Francisco Navarrete Mandly

2017-05-21 10:03

Comments

IfcOpenShell has an EXPRESS parser and code generator that generates code for the various IFC schemas. As part of the source code repository comes pre-generated code for the two widely used versions IFC2X3 and IFC4. But arbitrary schemas can be fed into the parser to provide support for other schemas at compile time. This post highlights the process of generating code for other schemas and talks about the recent developments within the IFC Alignment project._

Illustration of an alignment as exchanged in IFC

Creating a simple wall with property set and quantity information

Kianwee Chen

2015-07-26 00:00

Comments

The following recipe creates a simple wall from scratch using a templating technique to quickly populate the entity instances for the IFC project structure. Simple extrusion geometries, an IfcPropertySet and an IfcElementQuantity are added using the procedural entity instance creation functions. The script is written for a research project with Dr. Patrick Janssen in National University of Singapore. The script takes reference from the FreeCAD IFC exporter script and HelloWall miniExample.

HelloWall