Refactor test_sweeps.py: remove _is_swept_shape, restructure test directories, update test fixtures, and adjust assertions for geometry validation. Extend sweep_along_curve constructor to support fixed reference direction.

src/ifcgeom/mapping/IfcFixedReferenceSweptAreaSolid.cpp

@@ -123,11 +123,8 @@ taxonomy::ptr mapping::map_impl(const IfcSchema::IfcFixedReferenceSweptAreaSolid
         auto sweep = taxonomy::make<taxonomy::sweep_along_curve>(
             matrix,  // matrix4::ptr - no transformation needed
             profile, // face::ptr - the profile to sweep
-            dir      // item::ptr curve - the directrix curve
+            dir,     // item::ptr curve - the directrix curve
-        );
+            ref);
-
-        // Set the fixed reference direction for the sweep
-        sweep->direction = ref; // The fixed reference direction
 
         return sweep;
     }

src/ifcgeom/taxonomy.h

@@ -1215,10 +1215,10 @@ typedef item const* ptr;
 				virtual sweep_along_curve* clone_() const { return new sweep_along_curve(*this); }
 				virtual kinds kind() const { return SWEEP_ALONG_CURVE; }
 
-				sweep_along_curve(matrix4::ptr m, face::ptr basis, item::ptr surf, item::ptr crv) : sweep(m, basis), surface(surf), curve(crv) {}
+				sweep_along_curve(matrix4::ptr m, face::ptr basis, item::ptr surf, item::ptr crv) : sweep(m, basis), surface(surf), curve(crv), direction(nullptr) {}
 
 			    // New constructor for fixed reference swept area solid
-			    sweep_along_curve(matrix4::ptr m, face::ptr profile, item::ptr directrix) : sweep(m, profile), surface(nullptr), curve(directrix) { }
+			    sweep_along_curve(matrix4::ptr m, face::ptr profile, item::ptr directrix, direction3::ptr ref) : sweep(m, profile), surface(nullptr), curve(directrix), direction(ref) { }
 
 				virtual size_t calc_hash() const {
 					auto v = std::make_tuple(static_cast<size_t>(SWEEP_ALONG_CURVE), matrix->hash_components(), basis->calc_hash(), surface->calc_hash(), curve->calc_hash());

src/ifcopenshell-python/test/fixtures/geom/pipe.ifc

@@ -30,8 +30,8 @@ DATA;
 #30=IFCCARTESIANPOINT((0.,0.));
 #31=IFCAXIS2PLACEMENT2D(#30,$);
 #32=IFCCIRCLEPROFILEDEF(.AREA.,$,#31,0.179);
-#33=IFCCARTESIANPOINT((289080.818499209,5822851.36621952,118.886));
+#33=IFCCARTESIANPOINT((289.080,582.2,118.886));
-#34=IFCCARTESIANPOINT((289081.570466963,5822857.54453541,118.886));
+#34=IFCCARTESIANPOINT((290.081,582.9,118.886));
 #35=IFCPOLYLINE((#33,#34));
 #36=IFCDIRECTION((1.,0.,0.));
 #37=IFCFIXEDREFERENCESWEPTAREASOLID(#32,$,#35,$,$,#36);

src/ifcopenshell-python/test/fixtures/geom/simple_sweep_1.ifc

@@ -1,11 +1,11 @@
 ISO-10303-21;
 HEADER;
 FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
-FILE_NAME('/dev/null','2025-08-26T16:01:38+02:00',('AdaUser'),('AdaOrg'),'IfcOpenShell 0.8.2','IfcOpenShell 0.8.2','Nobody');
+FILE_NAME('/dev/null','2025-08-27T14:53:55+02:00',('AdaUser'),('AdaOrg'),'IfcOpenShell 0.8.2','IfcOpenShell 0.8.2','Nobody');
 FILE_SCHEMA(('IFC4X3_ADD2'));
 ENDSEC;
 DATA;
-#1=IFCPROJECT('1TMwI763XBx9E7h3kqXonB',$,'AdaProject',$,$,$,$,(#11),#6);
+#1=IFCPROJECT('2MG118AczBnBRhfOi7rLGC',$,'AdaProject',$,$,$,$,(#11),#6);
 #2=IFCSIUNIT(*,.LENGTHUNIT.,$,.METRE.);
 #3=IFCSIUNIT(*,.AREAUNIT.,$,.SQUARE_METRE.);
 #4=IFCSIUNIT(*,.VOLUMEUNIT.,$,.CUBIC_METRE.);
@@ -24,18 +24,18 @@ DATA;
 #17=IFCORGANIZATION('ADA','Assembly For Design and Analysis',$,$,$);
 #18=IFCPERSONANDORGANIZATION(#16,#17,$);
 #19=IFCAPPLICATION(#17,'XXX','ADA','ADA');
-#20=IFCOWNERHISTORY(#18,#19,.READWRITE.,$,$,#18,#19,1756216898);
+#20=IFCOWNERHISTORY(#18,#19,.READWRITE.,$,$,#18,#19,1756299235);
 #21=IFCDIRECTION((0.,0.,1.));
 #22=IFCDIRECTION((1.,0.,0.));
 #23=IFCCARTESIANPOINT((0.,0.,0.));
 #24=IFCAXIS2PLACEMENT3D(#23,#21,#22);
 #25=IFCLOCALPLACEMENT($,#24);
-#26=IFCSITE('301mrn5JHCxRMMvjp9uGM1',#20,'Ada',$,$,#25,$,$,.ELEMENT.,$,$,$,$,$);
+#26=IFCSITE('2V9fV9zKnAP9J5CfXLkqps',#20,'Ada',$,$,#25,$,$,.ELEMENT.,$,$,$,$,$);
-#27=IFCRELAGGREGATES('0RnSPGnurA1RhM0uNbRZ8k',#20,'Project Container',$,#1,(#26));
+#27=IFCRELAGGREGATES('12FX4aagX3HQdiLOLDvGX_',#20,'Project Container',$,#1,(#26));
 #28=IFCPROPERTYSINGLEVALUE('project',$,IFCTEXT('AdaProject'),$);
 #29=IFCPROPERTYSINGLEVALUE('schema',$,IFCTEXT('IFC4X3_add2'),$);
-#30=IFCPROPERTYSET('1Yj9$v$uH0ZQk9AOoWx4hD',#20,'Properties',$,(#28,#29));
+#30=IFCPROPERTYSET('2yltt4JCTAOAyhAFFKmDBW',#20,'Properties',$,(#28,#29));
-#31=IFCRELDEFINESBYPROPERTIES('2zKQjOOuP0VwvxPEpnJusI',#20,'Properties',$,(#26),#30);
+#31=IFCRELDEFINESBYPROPERTIES('3U0CyjG8XALx2oClwZMPg9',#20,'Properties',$,(#26),#30);
 #32=IFCMATERIAL('S355',$,'Steel');
 #33=IFCPROPERTYSINGLEVALUE('Grade',$,IFCTEXT('S355'),$);
 #34=IFCPROPERTYSINGLEVALUE('YieldStress',$,IFCPRESSUREMEASURE(355000000.),$);
@@ -45,7 +45,7 @@ DATA;
 #38=IFCPROPERTYSINGLEVALUE('SpecificHeatCapacity',$,IFCSPECIFICHEATCAPACITYMEASURE(0.03),$);
 #39=IFCPROPERTYSINGLEVALUE('MassDensity',$,IFCMASSDENSITYMEASURE(7850.),$);
 #40=IFCMATERIALPROPERTIES('MaterialMechanical','A Material property description',(#33,#34,#35,#36,#37,#38,#39),#32);
-#41=IFCRELASSOCIATESMATERIAL('13SLSaNyz4PwOBYuDhXcWi',#20,'S355','Objects related to S355',(#64),#32);
+#41=IFCRELASSOCIATESMATERIAL('3__DXGCfr15fk06ugmrrR4',#20,'S355','Objects related to S355',(#64),#32);
 #42=IFCDIRECTION((0.,0.,1.));
 #43=IFCDIRECTION((1.,0.,0.));
 #44=IFCCARTESIANPOINT((0.,0.,0.));
@@ -68,7 +68,7 @@ DATA;
 #61=IFCSURFACESTYLESHADING(#60,0.);
 #62=IFCSURFACESTYLE('Color1',.BOTH.,(#61));
 #63=IFCSTYLEDITEM(#57,(#62),'Color1');
-#64=IFCBUILDINGELEMENTPROXY('1R8AUxDeX02RhatZPFgzSt',#20,'sweep1',$,$,#46,#59,$,$);
+#64=IFCBUILDINGELEMENTPROXY('07ngBzsO5BK8C3rDUqQfSD',#20,'sweep1',$,$,#46,#59,$,$);
-#65=IFCRELCONTAINEDINSPATIALSTRUCTURE('0HNU_Fs7r0SRBiQ9Xqgv$k',#20,'Physical model',$,(#64),#26);
+#65=IFCRELCONTAINEDINSPATIALSTRUCTURE('1_r$SsBj1C3wgAjnhfmkqs',#20,'Physical model',$,(#64),#26);
 ENDSEC;
 END-ISO-10303-21;

src/ifcopenshell-python/test/fixtures/geom/simple_sweep_2.ifc

@@ -1,16 +1,16 @@
 ISO-10303-21;
 HEADER;
 FILE_DESCRIPTION(('ViewDefinition[DesignTransferView]'),'2;1');
-FILE_NAME('/dev/null','2025-08-27T11:12:44+02:00',('AdaUser'),('AdaOrg'),'IfcOpenShell 0.8.2','IfcOpenShell 0.8.2','Nobody');
+FILE_NAME('/dev/null','2025-08-27T15:03:01+02:00',('AdaUser'),('AdaOrg'),'IfcOpenShell 0.8.2','IfcOpenShell 0.8.2','Nobody');
 FILE_SCHEMA(('IFC4X3_ADD2'));
 ENDSEC;
 DATA;
-#1=IFCPROJECT('0bfgwqvaX7Vvg12DS5E4TH',$,'AdaProject',$,$,$,$,(#11),#6);
+#1=IFCPROJECT('1tjHZhewf3AROX1xjpvefY',$,'AdaProject',$,$,$,$,(#11),#6);
 #2=IFCSIUNIT(*,.LENGTHUNIT.,$,.METRE.);
 #3=IFCSIUNIT(*,.AREAUNIT.,$,.SQUARE_METRE.);
 #4=IFCSIUNIT(*,.VOLUMEUNIT.,$,.CUBIC_METRE.);
 #5=IFCSIUNIT(*,.PLANEANGLEUNIT.,$,.RADIAN.);
-#6=IFCUNITASSIGNMENT((#4,#2,#5,#3));
+#6=IFCUNITASSIGNMENT((#5,#4,#2,#3));
 #7=IFCCARTESIANPOINT((0.,0.,0.));
 #8=IFCDIRECTION((0.,0.,1.));
 #9=IFCDIRECTION((1.,0.,0.));
@@ -24,18 +24,18 @@ DATA;
 #17=IFCORGANIZATION('ADA','Assembly For Design and Analysis',$,$,$);
 #18=IFCPERSONANDORGANIZATION(#16,#17,$);
 #19=IFCAPPLICATION(#17,'XXX','ADA','ADA');
-#20=IFCOWNERHISTORY(#18,#19,.READWRITE.,$,$,#18,#19,1756285964);
+#20=IFCOWNERHISTORY(#18,#19,.READWRITE.,$,$,#18,#19,1756299781);
 #21=IFCDIRECTION((0.,0.,1.));
 #22=IFCDIRECTION((1.,0.,0.));
 #23=IFCCARTESIANPOINT((0.,0.,0.));
 #24=IFCAXIS2PLACEMENT3D(#23,#21,#22);
 #25=IFCLOCALPLACEMENT($,#24);
-#26=IFCSITE('1GDQO$O1L1QOKEaI81COHL',#20,'Ada',$,$,#25,$,$,.ELEMENT.,$,$,$,$,$);
+#26=IFCSITE('1$h1D7pKLBhQ2roRvKz9Kq',#20,'Ada',$,$,#25,$,$,.ELEMENT.,$,$,$,$,$);
-#27=IFCRELAGGREGATES('34vxVzLRfCB8P7OThopnom',#20,'Project Container',$,#1,(#26));
+#27=IFCRELAGGREGATES('1cbS0eMMz5482GelhPUH3D',#20,'Project Container',$,#1,(#26));
 #28=IFCPROPERTYSINGLEVALUE('project',$,IFCTEXT('AdaProject'),$);
 #29=IFCPROPERTYSINGLEVALUE('schema',$,IFCTEXT('IFC4X3_add2'),$);
-#30=IFCPROPERTYSET('2hTgvJbh1B7RR4nwsOfRDy',#20,'Properties',$,(#28,#29));
+#30=IFCPROPERTYSET('2Jj1ZXLcTFjxFj$8jn9r9Z',#20,'Properties',$,(#28,#29));
-#31=IFCRELDEFINESBYPROPERTIES('2wzYfhPqT9hwqI5vOO4yex',#20,'Properties',$,(#26),#30);
+#31=IFCRELDEFINESBYPROPERTIES('30tu3wf014T9Gbje7aeoNI',#20,'Properties',$,(#26),#30);
 #32=IFCMATERIAL('S355',$,'Steel');
 #33=IFCPROPERTYSINGLEVALUE('Grade',$,IFCTEXT('S355'),$);
 #34=IFCPROPERTYSINGLEVALUE('YieldStress',$,IFCPRESSUREMEASURE(355000000.),$);
@@ -45,16 +45,16 @@ DATA;
 #38=IFCPROPERTYSINGLEVALUE('SpecificHeatCapacity',$,IFCSPECIFICHEATCAPACITYMEASURE(0.03),$);
 #39=IFCPROPERTYSINGLEVALUE('MassDensity',$,IFCMASSDENSITYMEASURE(7850.),$);
 #40=IFCMATERIALPROPERTIES('MaterialMechanical','A Material property description',(#33,#34,#35,#36,#37,#38,#39),#32);
-#41=IFCRELASSOCIATESMATERIAL('0vr_O6t$T7vPWIa1EqEt6b',#20,'S355','Objects related to S355',(#64),#32);
+#41=IFCRELASSOCIATESMATERIAL('1kAam6k_5CO9mOkVDyk7FN',#20,'S355','Objects related to S355',(#64),#32);
 #42=IFCDIRECTION((0.,0.,1.));
 #43=IFCDIRECTION((1.,0.,0.));
 #44=IFCCARTESIANPOINT((0.,0.,0.));
 #45=IFCAXIS2PLACEMENT3D(#44,#42,#43);
 #46=IFCLOCALPLACEMENT(#25,#45);
-#47=IFCCARTESIANPOINTLIST2D(((0.,0.),(0.,0.1),(0.1,0.),(0.1,0.1)),$);
+#47=IFCCARTESIANPOINTLIST2D(((0.,0.),(0.1,0.),(0.1,0.05)),$);
-#48=IFCINDEXEDPOLYCURVE(#47,(IFCLINEINDEX((3,1)),IFCLINEINDEX((1,2)),IFCLINEINDEX((2,4)),IFCLINEINDEX((4,3))),$);
+#48=IFCINDEXEDPOLYCURVE(#47,(IFCLINEINDEX((3,1)),IFCLINEINDEX((1,2)),IFCLINEINDEX((2,3))),$);
 #49=IFCARBITRARYCLOSEDPROFILEDEF(.AREA.,$,#48);
-#50=IFCCARTESIANPOINTLIST3D(((-100.,-50.,199.610854),(-100.,-50.,200.),(-99.974928791787,-49.9996866104928,199.513897412378),(-99.9060013418686,-49.998825019006,199.441251),(-99.3499585838692,-49.9918744730554,199.093724161494),(-99.2406758662487,-49.9607719931374,198.987781372709),(-99.2000000393918,-49.8803717417563,198.861230109006),(-99.2000000393918,-49.3859696738752,198.235404705615),(-99.1121322022443,-49.2544691526923,198.068948349419),(-98.9000000393918,-49.2000000638752,198.000000135615),(-98.3,-49.1999999172672,197.999999950035)),$);
+#50=IFCCARTESIANPOINTLIST3D(((100.,50.,-200.389146),(100.,50.,-200.),(100.025071208213,50.0003133895072,-200.486102587622),(100.093998658131,50.001174980994,-200.558749),(100.650041416131,50.0081255269446,-200.906275838506),(100.759324133751,50.0392280068626,-201.012218627291),(100.799999960608,50.1196282582437,-201.138769890994),(100.799999960608,50.6140303261248,-201.764595294385),(100.887867797756,50.7455308473077,-201.931051650581),(101.099999960608,50.7999999361248,-201.999999864385),(101.7,50.8000000827328,-202.000000049965)),$);
 #51=IFCINDEXEDPOLYCURVE(#50,(IFCLINEINDEX((2,1)),IFCARCINDEX((1,3,4)),IFCLINEINDEX((4,5)),IFCARCINDEX((5,6,7)),IFCLINEINDEX((7,8)),IFCARCINDEX((8,9,10)),IFCLINEINDEX((10,11))),$);
 #52=IFCDIRECTION((1.,-0.,0.));
 #53=IFCCARTESIANPOINT((0.,0.,0.));
@@ -68,7 +68,7 @@ DATA;
 #61=IFCSURFACESTYLESHADING(#60,0.);
 #62=IFCSURFACESTYLE('Color1',.BOTH.,(#61));
 #63=IFCSTYLEDITEM(#57,(#62),'Color1');
-#64=IFCBUILDINGELEMENTPROXY('0pDZhwPyT3dRMnPGA47kAn',#20,'sweep1',$,$,#46,#59,$,$);
+#64=IFCBUILDINGELEMENTPROXY('34gqNt7M58Z972x$etr9V2',#20,'sweep2',$,$,#46,#59,$,$);
-#65=IFCRELCONTAINEDINSPATIALSTRUCTURE('196Q7zPfr4LxqeArD0gmJa',#20,'Physical model',$,(#64),#26);
+#65=IFCRELCONTAINEDINSPATIALSTRUCTURE('1kbNj7znLCygBdHO9SJygX',#20,'Physical model',$,(#64),#26);
 ENDSEC;
 END-ISO-10303-21;

src/ifcopenshell-python/test/geom/test_sweeps.py

@@ -0,0 +1,138 @@
+import pathlib
+from typing import List, Sequence, Tuple
+
+import ifcopenshell
+import pytest
+from OCC.Core.TopoDS import TopoDS_Shape, TopoDS_Compound
+
+
+def _bbox_from_vertices(verts: List[Tuple[float, float, float]]):
+    if not verts:
+        return (0, 0, 0), (0, 0, 0)
+    xs = [v[0] for v in verts]
+    ys = [v[1] for v in verts]
+    zs = [v[2] for v in verts]
+    mn = (min(xs), min(ys), min(zs))
+    mx = (max(xs), max(ys), max(zs))
+    return mn, mx
+
+
+def _size_from_bbox(mn, mx):
+    return (mx[0] - mn[0], mx[1] - mn[1], mx[2] - mn[2])
+
+
+def _triples(flat: Sequence[float]) -> List[Tuple[float, float, float]]:
+    return [(float(flat[i]), float(flat[i + 1]), float(flat[i + 2])) for i in range(0, len(flat), 3)]
+
+
+def load_ifc_occ_shape(ifc_path: str) -> TopoDS_Shape:
+    try:
+        import ifcopenshell.geom as geom
+    except Exception as e:
+        raise RuntimeError("ifcopenshell.geom not available: cannot validate IFC geometry") from e
+
+    settings = geom.settings()
+    settings.set(settings.USE_WORLD_COORDS, True)
+    settings.set("use-python-opencascade", True)
+
+    # Open the IFC file
+    f = ifcopenshell.open(ifc_path)
+
+    # Find the first representable product (prefer IfcBuildingElementProxy, then any product with representation)
+    products = f.by_type("IfcProduct")
+    target = None
+    for p in products:
+        if p.is_a("IfcBuildingElementProxy") and getattr(p, "Representation", None):
+            target = p
+            break
+    if target is None:
+        for p in products:
+            if getattr(p, "Representation", None):
+                target = p
+                break
+    if target is None:
+        raise RuntimeError("No representable product found in IFC for shape extraction")
+
+    # Create the shape using ifcopenshell.geom with opencascade geometry library
+    shape_result = geom.create_shape(settings, target, geometry_library="opencascade")
+
+    # Extract the OpenCASCADE TopoDS_Shape from the result
+    # The create_shape function returns an object with an occ_shape attribute when using opencascade
+    if hasattr(shape_result, "geometry") and shape_result.geometry:
+        occ_shape = shape_result.geometry
+        if isinstance(occ_shape, TopoDS_Compound):
+            json_data = occ_shape.DumpJson()
+            print(json_data)
+        else:
+            raise NotImplemented(f"Unsupported shape type: {type(occ_shape)}")
+
+        return occ_shape
+    else:
+        raise RuntimeError("Failed to extract OpenCASCADE shape from IFC geometry")
+
+
+def load_ifc_mesh_bbox(ifc_path: str):
+    """Load first product's mesh from IFC using ifcopenshell.geom and return bbox and size."""
+    try:
+        import ifcopenshell.geom as geom
+    except Exception as e:
+        raise RuntimeError("ifcopenshell.geom not available: cannot validate IFC geometry") from e
+
+    settings = geom.settings()
+    settings.set(settings.USE_WORLD_COORDS, True)
+
+    f = ifcopenshell.open(ifc_path)
+    # Prefer the proxy we created, otherwise take any product with representation
+    products = f.by_type("IfcProduct")
+    target = None
+    for p in products:
+        if p.is_a("IfcBuildingElementProxy") and getattr(p, "Representation", None):
+            target = p
+            break
+    if target is None:
+        for p in products:
+            if getattr(p, "Representation", None):
+                target = p
+                break
+    if target is None:
+        raise RuntimeError("No representable product found in IFC for validation")
+
+    shape = geom.create_shape(settings, target)
+    verts = _triples(shape.geometry.verts)
+    mn, mx = _bbox_from_vertices(verts)
+    return mn, mx, _size_from_bbox(mn, mx)
+
+
+@pytest.fixture
+def geom_dir():
+    return pathlib.Path(__file__).parent.parent.resolve().absolute() / "fixtures/geom"
+
+
+def test_simple_sweep_1(geom_dir):
+    ifc_file_path = geom_dir / "simple_sweep_1.ifc"
+    ifc_mn, ifc_mx, ifc_sz = load_ifc_mesh_bbox(ifc_file_path)
+    occ_shape = load_ifc_occ_shape(ifc_file_path)
+    assert occ_shape is not None
+    assert ifc_sz == pytest.approx((0.8957825463853046, 0.1, 1.1))
+    assert ifc_mn == pytest.approx((0.0, 0, -0.1))
+    assert ifc_mx == pytest.approx((0.8957825463853046, 0.1, 1.0))
+
+
+def test_simple_sweep_2(geom_dir):
+    ifc_file_path = geom_dir / "simple_sweep_2.ifc"
+    ifc_mn, ifc_mx, ifc_sz = load_ifc_mesh_bbox(ifc_file_path)
+    occ_shape = load_ifc_occ_shape(ifc_file_path)
+    assert occ_shape is not None
+    assert ifc_sz == pytest.approx((0.8764374444355525, 1.800000587893038, 2.095849252263605))
+    assert ifc_mn == pytest.approx((50.0, 99.9, 200.0))
+    assert ifc_mx == pytest.approx((50.87643744443555, 101.70000058789304, 202.0958492522636))
+
+
+def test_pipe_12d(geom_dir):
+    ifc_file_path = geom_dir / "pipe.ifc"
+    ifc_mn, ifc_mx, ifc_sz = load_ifc_mesh_bbox(ifc_file_path)
+    occ_shape = load_ifc_occ_shape(ifc_file_path)
+    assert occ_shape is not None
+    assert ifc_sz == pytest.approx((1.205888147422229, 0.9929900508137735, 0.35776115971654576))
+    assert ifc_mn == pytest.approx((288.9774190979147, 582.0537006391681, 118.70711942014172))
+    assert ifc_mx == pytest.approx((290.18330724533695, 583.0466906899819, 119.06488057985827))

test/test_sweeps.py

@@ -1,235 +0,0 @@
-import pathlib
-from typing import List, Sequence, Tuple
-
-import ifcopenshell
-import pytest
-from OCC.Core.TopoDS import TopoDS_Shape, TopoDS_Compound
-
-
-def _bbox_from_vertices(verts: List[Tuple[float, float, float]]):
-    if not verts:
-        return (0, 0, 0), (0, 0, 0)
-    xs = [v[0] for v in verts]
-    ys = [v[1] for v in verts]
-    zs = [v[2] for v in verts]
-    mn = (min(xs), min(ys), min(zs))
-    mx = (max(xs), max(ys), max(zs))
-    return mn, mx
-
-
-def _size_from_bbox(mn, mx):
-    return (mx[0] - mn[0], mx[1] - mn[1], mx[2] - mn[2])
-
-
-def _triples(flat: Sequence[float]) -> List[Tuple[float, float, float]]:
-    return [(float(flat[i]), float(flat[i + 1]), float(flat[i + 2])) for i in range(0, len(flat), 3)]
-
-
-def _is_swept_shape(occ_shape: TopoDS_Shape) -> bool:
-    """Analyze if the given OpenCASCADE shape represents a swept shape using topology exploration."""
-    try:
-        from OCC.Core.TopExp import TopExp_Explorer
-        from OCC.Core.TopAbs import TopAbs_FACE, TopAbs_EDGE, TopAbs_WIRE
-        from OCC.Core.BRep_Tool import BRep_Tool
-        from OCC.Core.GeomLProp_SLProps import GeomLProp_SLProps
-        from OCC.Core.BRepAdaptor_Surface import BRepAdaptor_Surface
-        from OCC.Core.GeomAbs import (
-            GeomAbs_Cylinder,
-            GeomAbs_Plane,
-            GeomAbs_SurfaceOfExtrusion,
-            GeomAbs_SurfaceOfRevolution,
-        )
-        from OCC.Core.gp import gp_Vec
-        import math
-    except ImportError as e:
-        raise RuntimeError("pythonocc-core not available for topology analysis") from e
-
-    if occ_shape.IsNull():
-        return False
-
-    # Explore faces to look for swept surface characteristics
-    face_explorer = TopExp_Explorer(occ_shape, TopAbs_FACE)
-    swept_indicators = 0
-    total_faces = 0
-
-    while face_explorer.More():
-        face = face_explorer.Current()
-        total_faces += 1
-
-        # Get the surface adaptor for this face
-        surface_adaptor = BRepAdaptor_Surface(face)
-        surface_type = surface_adaptor.GetType()
-
-        # Check for surface types that indicate swept geometry
-        if surface_type in [GeomAbs_Cylinder, GeomAbs_SurfaceOfExtrusion, GeomAbs_SurfaceOfRevolution]:
-            swept_indicators += 1
-
-        # For planar surfaces, check if they form a pattern consistent with swept geometry
-        elif surface_type == GeomAbs_Plane:
-            # Analyze if planar faces are arranged in a swept pattern
-            # This is a simplified check - could be enhanced further
-            if _has_parallel_opposite_faces(occ_shape, face):
-                swept_indicators += 0.5  # Partial indicator
-
-        face_explorer.Next()
-
-    # Additional check: analyze edge patterns for swept characteristics
-    edge_analysis = _analyze_edge_patterns(occ_shape)
-
-    # Determine if this is likely a swept shape
-    # If more than 50% of faces show swept characteristics, or we have strong edge patterns
-    swept_ratio = swept_indicators / max(total_faces, 1)
-    is_swept = swept_ratio > 0.5 or edge_analysis
-
-    if is_swept:
-        print(f"Swept shape analysis: {swept_indicators}/{total_faces} faces show swept characteristics")
-        if edge_analysis:
-            print("Edge pattern analysis also indicates swept geometry")
-
-    return is_swept
-
-
-def _has_parallel_opposite_faces(shape: TopoDS_Shape, reference_face) -> bool:
-    """Check if the shape has faces parallel to the reference face (indicating extrusion)."""
-    try:
-        from OCC.Core.TopExp import TopExp_Explorer
-        from OCC.Core.TopAbs import TopAbs_FACE
-        from OCC.Core.BRepAdaptor_Surface import BRepAdaptor_Surface
-        from OCC.Core.GeomAbs import GeomAbs_Plane
-        from OCC.Core.gp import gp_Vec
-        import math
-
-        ref_adaptor = BRepAdaptor_Surface(reference_face)
-        if ref_adaptor.GetType() != GeomAbs_Plane:
-            return False
-
-        ref_normal = ref_adaptor.Plane().Axis().Direction()
-
-        face_explorer = TopExp_Explorer(shape, TopAbs_FACE)
-        while face_explorer.More():
-            face = face_explorer.Current()
-            if not face.IsSame(reference_face):
-                face_adaptor = BRepAdaptor_Surface(face)
-                if face_adaptor.GetType() == GeomAbs_Plane:
-                    face_normal = face_adaptor.Plane().Axis().Direction()
-                    # Check if normals are parallel (dot product close to ±1)
-                    dot_product = abs(ref_normal.Dot(face_normal))
-                    if dot_product > 0.99:  # Very close to parallel
-                        return True
-            face_explorer.Next()
-        return False
-    except:
-        return False
-
-
-def load_ifc_occ_shape(ifc_path: str) -> TopoDS_Shape:
-    try:
-        import ifcopenshell.geom as geom
-    except Exception as e:
-        raise RuntimeError("ifcopenshell.geom not available: cannot validate IFC geometry") from e
-
-    settings = geom.settings()
-    settings.set(settings.USE_WORLD_COORDS, True)
-    settings.set("use-python-opencascade", True)
-
-    # Open the IFC file
-    f = ifcopenshell.open(ifc_path)
-
-    # Find the first representable product (prefer IfcBuildingElementProxy, then any product with representation)
-    products = f.by_type("IfcProduct")
-    target = None
-    for p in products:
-        if p.is_a("IfcBuildingElementProxy") and getattr(p, "Representation", None):
-            target = p
-            break
-    if target is None:
-        for p in products:
-            if getattr(p, "Representation", None):
-                target = p
-                break
-    if target is None:
-        raise RuntimeError("No representable product found in IFC for shape extraction")
-
-    # Create the shape using ifcopenshell.geom with opencascade geometry library
-    shape_result = geom.create_shape(settings, target, geometry_library="opencascade")
-
-    # Extract the OpenCASCADE TopoDS_Shape from the result
-    # The create_shape function returns an object with an occ_shape attribute when using opencascade
-    if hasattr(shape_result, "geometry") and shape_result.geometry:
-        occ_shape = shape_result.geometry
-        if isinstance(occ_shape, TopoDS_Compound):
-            json_data = occ_shape.DumpJson()
-            print(json_data)
-        else:
-            raise NotImplemented(f"Unsupported shape type: {type(occ_shape)}")
-
-        return occ_shape
-    else:
-        raise RuntimeError("Failed to extract OpenCASCADE shape from IFC geometry")
-
-
-def load_ifc_mesh_bbox(ifc_path: str):
-    """Load first product's mesh from IFC using ifcopenshell.geom and return bbox and size."""
-    try:
-        import ifcopenshell.geom as geom
-    except Exception as e:
-        raise RuntimeError("ifcopenshell.geom not available: cannot validate IFC geometry") from e
-
-    settings = geom.settings()
-    settings.set(settings.USE_WORLD_COORDS, True)
-
-    f = ifcopenshell.open(ifc_path)
-    # Prefer the proxy we created, otherwise take any product with representation
-    products = f.by_type("IfcProduct")
-    target = None
-    for p in products:
-        if p.is_a("IfcBuildingElementProxy") and getattr(p, "Representation", None):
-            target = p
-            break
-    if target is None:
-        for p in products:
-            if getattr(p, "Representation", None):
-                target = p
-                break
-    if target is None:
-        raise RuntimeError("No representable product found in IFC for validation")
-
-    shape = geom.create_shape(settings, target)
-    verts = _triples(shape.geometry.verts)
-    mn, mx = _bbox_from_vertices(verts)
-    return mn, mx, _size_from_bbox(mn, mx)
-
-
-@pytest.fixture
-def test_dir():
-    return pathlib.Path(__file__).parent.resolve().absolute()
-
-
-def test_simple_sweep_1(test_dir):
-    ifc_file_path = test_dir / "input_temp/simple_sweep_1.ifc"
-    ifc_mn, ifc_mx, ifc_sz = load_ifc_mesh_bbox(ifc_file_path)
-    occ_shape = load_ifc_occ_shape(ifc_file_path)
-    assert occ_shape is not None
-    assert ifc_sz == pytest.approx((1.1, 0.1, 0.89578254))
-    assert ifc_mn == pytest.approx((-1.0, -1.3877787807814457e-17, 0.0))
-    assert ifc_mx == pytest.approx((0.10000000000000002, 0.1, 0.8957825463853046))
-
-
-def test_simple_sweep_2(test_dir):
-    ifc_file_path = test_dir / "input_temp/simple_sweep_2.ifc"
-    ifc_mn, ifc_mx, ifc_sz = load_ifc_mesh_bbox(ifc_file_path)
-    occ_shape = load_ifc_occ_shape(ifc_file_path)
-    assert occ_shape is not None
-    assert ifc_sz == pytest.approx((1.800000679914902, 0.9243618756667757, 2.0958492522636902))
-    assert ifc_mn == pytest.approx((-100.1, -50.0, 197.9041507477363))
-    assert ifc_mx == pytest.approx((-98.29999932008509, -49.075638124333224, 200.0))
-
-
-def test_pipe_12d(test_dir):
-    ifc_file_path = test_dir / "input_temp/pipe.ifc"
-    ifc_mn, ifc_mx, ifc_sz = load_ifc_mesh_bbox(ifc_file_path)
-    occ_shape = load_ifc_occ_shape(ifc_file_path)
-    assert occ_shape is not None
-    assert ifc_sz == pytest.approx((1.1068712115520611, 6.2215114729478955, 0.35776115971654576))
-    assert ifc_mn == pytest.approx((289080.64128449163, 5822851.344592881, 118.70711942014172))
-    assert ifc_mx == pytest.approx((289081.7481557032, 5822857.566104354, 119.06488057985827))