Implements the ifcgit/Bonsai diff algorithm for the preview service:
diff.py: step_ids_from_diff() parses git diff text (regex on +#NNN= / -#NNN=
lines) to classify step IDs as added/modified/removed. expand_step_ids()
walks IfcShapeRepresentation, IfcObjectPlacement, IfcPropertySet, and
IfcTypeProduct relationships to promote changed sub-entities to the parent
IfcProduct that is visually affected.
render.py: render_diff() does two passes over the same camera. Pass 1 renders
the head model with green=added, blue=modified, ghost=unchanged. Pass 2
renders only the removed elements from the base model in red, using the camera
auto-fitted to pass 1. PIL composites the passes: wherever pass 2 is not
white background it stamps onto pass 1. Moved elements (modified) appear once
in blue with no doubling artefact.
git.py: diff_text() runs git diff against the cached bare repo clone and
returns the raw text for diff.py to parse.
service.py: GET+POST /render_diff endpoint. Fetches both commits, gets
diff text, runs the full pipeline sandboxed. Caches on disk when both refs
are immutable. Pillow added to render/service extras.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- pyproject.toml: add bcf to [service] dependencies (ifcurl-9rk)
- README.md: replace bogus GET /viewer row with POST /bcf (ifcurl-ttb)
- viewer-url.js: fix GitLab host detection (includes → startsWith) (ifcurl-3n4)
- git.py: call _evict_if_needed() after fetch, not only after clone (ifcurl-t1k)
- bcf.py: add description param to build_bcf(); markup.bcf now includes
<Description> when provided (ifcurl-7wg)
- service.py: pass request URL as description to build_bcf() (ifcurl-7wg)
- viewer.html: BCF export reads visibility= from URL and sets
DefaultVisibility accordingly (ifcurl-sto)
- viewer.html: applyCameraParam now switches to orthographic projection
and applies scale when scale= is present in URL (ifcurl-4l7)
- tests: 3 new tests for description field; update JS tests pass
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- ifcurl/service.py: FastAPI POST /preview → image/png with three
caching tiers (bytes LRU, GUID-set LRU, PNG filesystem)
- ifcurl/git.py: add fetch_ifc() returning (hexsha, bytes); refactor
around _get_repo() and _read_commit_blob() helpers
- ifcurl/__main__.py: add 'ifcurl serve' subcommand; no-args prints
full help; all subcommands have descriptions and examples; URL format
and parameter reference in every help page
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