bimdelta

Code review for building models. bimdelta compares two versions of an IFC model element by element and plugs into Git, so git diff model.ifc shows which walls, doors and columns changed instead of thousands of lines of STEP text.

pip install bimdelta

bimdelta diff rev-a.ifc rev-b.ifc                 # table in the terminal
bimdelta diff rev-a.ifc rev-b.ifc -f markdown     # for a pull request or a report
bimdelta diff rev-a.ifc rev-b.ifc -f json         # the full DiffResult
bimdelta diff rev-a.ifc rev-b.ifc --filter "class=IfcWall*,storey=Level 1"

bimdelta install-git-driver                       # once per clone
git diff HEAD~1 -- model.ifc
bimdelta blame 2O2Fr$t4X7Zf8NOew3FLOH model.ifc   # commits that touched one element
bimdelta quantities rev-a.ifc rev-b.ifc --by material

The diff engine is bimdelta-core, built on IfcOpenShell. Documentation: CLI reference and Git integration.

Part of BIMDelta. MIT licensed.