https://github.com/ifcquery/ifcsplitandmerge

Exremely powerful IFC viewer, including features like split and merge
https://github.com/ifcquery/ifcsplitandmerge

bim ifc ifc-viewer mesh-compression openscenegraph qt6 quantization web-ifc

Last synced: 9 days ago
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Exremely powerful IFC viewer, including features like split and merge

Host: GitHub
URL: https://github.com/ifcquery/ifcsplitandmerge
Owner: ifcquery
License: other
Created: 2025-06-15T11:46:50.000Z (about 1 year ago)
Default Branch: main
Last Pushed: 2026-03-11T03:12:55.000Z (3 months ago)
Last Synced: 2026-03-11T09:59:18.132Z (3 months ago)
Topics: bim, ifc, ifc-viewer, mesh-compression, openscenegraph, qt6, quantization, web-ifc
Homepage:
Size: 47.9 KB
Stars: 21
Watchers: 0
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE.txt

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README

# IfcSplitAndMerge
View, split and merge IFC files

### Current features:
- Load IFC file, extract element hierarchy into tree view
- 3D view of loaded model
- Mesh compression (deduplication, quantization) for efficient rendering of large models
- Select elements in 3D view through single click or rubberband
- Select elements in tree view, show attributes and property sets of selected objects
- Find and select entities by STEP ID (local ID, unique in each file), GUID (globally unique ID), name or description via text input
- Split: Write IFC file with selected entities. Selecting objects like IfcBuildingStorey or single objects with any of the above mentioned selection methods
- Merge: Write merged IFC file of several loaded IFC files
- Save IFC model as html document with embedded geometry and meta data
- Very low memory footprint: loading several GByte IFC files works fine on standard PCs
- Full text search in all property sets and properties -> select elements -> write to new IFC file

### Download for free
[https://github.com/ifcquery/IfcSplitAndMerge/releases](https://github.com/ifcquery/IfcSplitAndMerge/releases)

### Example use case

Select elements in 3D view (single or rubberband selection), treeview, or text input search criteria:

Write file with selected elements:

Result: IFC file with only the selected elements:

### Access to source code: use as SDK or base for other IFC applications

You can use this tool as a template for your own IFC application, or parts of it for other applications.
The source code is very clean and minimalistic, perfect for easy maintenance and further development.
To request access to the source code, please go to [www.ifcquery.com](https://ifcquery.com/)

### IFC files for testing:
https://github.com/ThatOpen/engine_web-ifc/tree/main/tests/ifcfiles/public

https://github.com/user-attachments/files/15805837/ViadottoAcerno.zip

### Credits:

this tool uses
- https://github.com/ThatOpen/engine_web-ifc (with additional changes from https://github.com/Creoox/engine_web-ifc) for fast and robust loading and processing of IFC files.
- Qt as GUI toolkit
- OpenSceneGraph for the 3D view

S_Office_Integrated Design Archi.ifc (from https://github.com/ThatOpen/engine_web-ifc/tree/main/tests/ifcfiles/public)