Computational Design Day 2024

Transcript

1. Computational Geometry Industry Foundation Classes IfcOpenShell https://speakerdeck.com/aothms https://github.com/AECgeeks/computational- design-day-2024
2. Speaker • Thomas Krijnen • past: Post-doctoral researcher @ TU Delft, NL • past: PhD @ TU Eindhoven, NL • Founder AECgeeks • Maintainer IfcOpenShell.org • mail@thomaskrijnen.com • @aothms
3. BIM as initially presented
4. IFC usage in reality
5. IFC usage in reality • Exported for a specific purpose • Highlighting specific aspect of the building • At a specific time • Using a specific version of a tool • With individual modelling preferences
6. Computational geometry Triangle mesh Well-understood, canonical visualization format, requires lots of data for curved surfaces. Convex and planar. Polyhedron Suitable for hard surface modelling, polygons convenient to manipulate (e.g. inset, extrude). Boundary Representation (BRep) Carries more semantics (e.g. cylinder radius), implementation a lot more complex Voxels Regularized grid, implementation trivial and robust. Slanted surfaces only approximated as “staircases”. Computational Solid Geometry Implicit format, when only using primitives, limited usability
7. Triangle mesh
8. Polyhedron https://doc.cgal.org/latest/HalfedgeDS/index.html
9. Boundary Representation (BRep) u (periodic) ⟶ v ⟶ 0 2π
10. Voxels 0 1 2 3 4
11. Computational Solid Geometry
12. Why python - Batteries included: - web: flask, django, e.g view.ifcopenshell.org - machine learning: pytorch, tensorflow, keras, scikit, … - geometry: pythonOCC, shapely, … - graphs: networkx, rdflib, … - Readable syntax, reasonable semantics wrt typing, expressive types (e.g sets, containment operators, …) - Interpreted (no lengthy compilation times) and high performance possible (e.g numpy, numba, pypy, …)
13. Aims Automate to solve everyday challenges Automate to create a better built environment Infer a higher level understanding from BIM
14. Voxels evacuation analysis https://github.com/opensourceBIM/voxelization_toolkit
15. Voxels headroom analysis https://github.com/opensourceBIM/voxelization_toolkit
16. ILS Space aggregation Individual spaces Aggregated interior spaces joined accross non-loadbearing partitions
17. Setup Install Miniconda (a Python distribution with optimized binary packages) https://docs.conda.io/projects/miniconda/en/latest/ Activate the "anaconda command prompt" and run conda create -n ifopsh07 conda-forge::pythonocc-core==7.5.1 python<3.11 numpy scipy matplotlib conda activate ifopsh07 python -m pip install networkx ifcopenshell jupyter lark pythreejs
18. Anatomy of a simple Python script
19. https://github.com/AECgeeks/computational-design-day- 2024/blob/main/01_visualize.ipynb
20. https://github.com/AECgeeks/computational-design-day- 2024/blob/main/02_analyze.ipynb
21. Validity
22. https://github.com/AECgeeks/computational-design-day- 2024/blob/main/04_machine_learning.ipynb
23. https://github.com/AECgeeks/computational-design-day- 2024/blob/main/03_graph.ipynb
24. https://github.com/AECgeeks/computational-design-day- 2024/blob/main/05_create_space.ipynb