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CyrilWaechter 2f7af12734 Add auto-detect space height from elements above

Space height is now auto-detected using IFC geometry directly
(ifcopenshell.geom.create_shape + get_shape_bottom/top_elevation)
instead of Blender object bounding boxes. This fixes height detection
when the slab above is not loaded in Blender.

Detection priority:
1. IfcRelConnectsElements(TOP) connections on bounding walls
2. IfcSlab / IfcRoof elements above with XY overlap to space polygon
3. Minimum wall top Z of bounding walls
4. Fallback to space_height property (default 3m)

Added space_height and force_space_height properties to
BIMSpatialDecompositionProperties. The height field is synced to
the active space's height via active_object_callback (msgbus), not
in draw().

Added ApplySpaceHeightToSelection operator to modify
IfcExtrudedAreaSolid.Depth in place without regenerating footprint.

bounding_walls changed from list[tuple[element, obj]] to
list[entity_instance] since Blender objects are no longer needed.

Generated with the assistance of an AI coding tool.

2026-08-02 00:56:26 +02:00