fix not working bim.generate_space because of the units mismatch

Not sure when this occurred but get_bmesh_from_polygon was expecting Polygon in project units but it was SI. Since it's probably better to move everything to SI, added an option to specify whether polygon is in SI or not.

src/bonsai/bonsai/core/spatial.py

@@ -178,7 +178,7 @@ def generate_space(ifc: tool.Ifc, model: tool.Model, root: tool.Root, spatial: t
     if not space_polygon:
         return
 
-    bm = spatial.get_bmesh_from_polygon(space_polygon, h=h)
+    bm = spatial.get_bmesh_from_polygon(space_polygon, h=h, polygon_is_si=True)
 
     mesh = spatial.get_named_mesh_from_bmesh(name="Space", bmesh=bm)
 

src/bonsai/bonsai/core/tool.py

@@ -930,7 +930,7 @@ class Spatial:
     def get_purged_inner_holes_poly(cls, union_geom, min_area): pass
     def get_poly_valid_interior_list(cls, poly, min_area, interiors_list): pass
     def get_buffered_poly_from_linear_ring(cls, linear_ring): pass
-    def get_bmesh_from_polygon(cls, poly, h): pass
+    def get_bmesh_from_polygon(cls, poly, h, polygon_is_si=False): pass
     def get_named_obj_from_bmesh(cls, name, bmesh): pass
     def get_named_obj_from_mesh(cls, name, mesh): pass
     def get_named_mesh_from_bmesh(cls, name, bmesh): pass

src/bonsai/bonsai/tool/spatial.py

@@ -893,14 +893,18 @@ class Spatial(bonsai.core.tool.Spatial):
         return poly
 
     @classmethod
-    def get_bmesh_from_polygon(cls, poly: Polygon, h: float) -> bmesh.types.BMesh:
+    def get_bmesh_from_polygon(cls, poly: Polygon, h: float, polygon_is_si: bool = False) -> bmesh.types.BMesh:
+        """
+        :param h: Height, in meters.
+        :param polygon_is_si: Should be True if `poly` is defined in meters.
+        """
         mat = Matrix()
         bm = bmesh.new()
         bm.verts.index_update()
         bm.edges.index_update()
 
         mat_invert = mat.inverted()
-        si_conversion = ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
+        si_conversion = 1.0 if polygon_is_si else ifcopenshell.util.unit.calculate_unit_scale(tool.Ifc.get())
         new_verts = [
             bm.verts.new(mat_invert @ (Vector([v[0], v[1], 0]) * si_conversion)) for v in poly.exterior.coords[0:-1]
         ]