Move Blender-independent boundary generation algorithm from Bonsai
(GPL) to ifcopenshell.util.boundary (LGPL):
- ifcopenshell.util.shape.dissolve_faces: reconstruct polygonal faces
from triangulated mesh using original edges from get_edges() + Union-Find
- ifcopenshell.util.boundary.auto_generate_boundaries: full boundary
generation algorithm using IFC geometry (numpy, shapely) without
Blender — replaces bmesh, matrix_world, tool.Cad.is_x, mathutils with
numpy equivalents
- Uses existing ifcopenshell.api.boundary.assign_connection_geometry
for connection geometry creation
- Uses existing ifcopenshell.util.placement.a2p + np_normal for face
matrix construction
- BOUNDARY_ELEMENT_CLASSES expanded to include IfcColumn and
IfcCurtainWall
Bonsai's boundary/operator.py auto_generate_boundaries is now a thin
adapter handling Blender-specific preprocessing (flushing moved
objects, building iterator + tree) then delegating to the util module.
Added 12 tests: 3 for dissolve_faces, 3 for auto_generate_boundaries.
Generated with the assistance of an AI coding tool.
CyrilWaechter