Bonsai: place auto-generated opening boundaries at their real position (#8237) (#8311)

* Bonsai: place auto-generated opening boundaries at their real position #8237

auto_generate_boundaries (single-space mode) built each opening/filling boundary
from the opening's LOCAL geometry (get_vertices) but first did
mat.translation = (0, 0, 0) on its placement matrix. Because the vertices are
local, that placement translation is exactly what carries the opening to its
real location, so zeroing it collapsed every window/door boundary onto the
origin. This is why the auto path misplaced window boundaries while the
single-element path (create_element_boundary) placed them correctly, as
@MDHering observed with the two modes. Keep the full placement matrix.

Verified on the reporter's file: the opening's real placement is (0.1, 1.5, 1.0);
a vertex went from (0.6, 0, 0) under the old code to (0.7, 1.5, 1.0) with the fix,
i.e. moved by exactly the (0.1, 1.5, 1.0) that was being discarded.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

* Remove superfluous comment from #8237 fix

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Co-authored-by: CyrilWaechter <cyril@biminsight.ch>

src/bonsai/bonsai/bim/module/boundary/operator.py

@@ -843,7 +843,6 @@ class AddBoundary(bpy.types.Operator, tool.Ifc.Operator):
                         settings = ifcopenshell.geom.settings()
                         shape = ifcopenshell.geom.create_shape(settings, opening)
                         mat = Matrix(ifcopenshell.util.shape.get_shape_matrix(shape))
-                        mat.translation = (0, 0, 0)
                         opening_bm = bmesh.new()
                         verts = ifcopenshell.util.shape.get_vertices(shape.geometry)
                         for vert in verts: