Test case #5485

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

@@ -1,4 +1,6 @@
 import collections
+
+import numpy as np
 import ifcopenshell
 import ifcopenshell.geom
 
@@ -52,3 +54,32 @@ def test_polyhedral_setting(file):
     assert len(obj.geometry.faces) == 11
     # 10 facets with 1 bound, 1 facet with 2 bounds
     assert sorted(collections.Counter(map(len, obj.geometry.faces)).items()) == [(1, 10), (2, 1)]
+
+
+def get_edges(inst):
+    coords = inst.Coordinates.CoordList
+    for f in inst.Faces:
+
+        def emit(loop):
+            fcoords = list(map(lambda i: coords[i - 1], loop))
+            shifted = fcoords[1:] + [fcoords[0]]
+            return map(frozenset, zip(fcoords, shifted))
+
+        yield from emit(f.CoordIndex)
+
+        if f.is_a("IfcIndexedPolygonalFaceWithVoids"):
+            for inner in f.InnerCoordIndices:
+                yield from emit(inner)
+
+
+@pytest.mark.parametrize("file", ["geom/polygonal-face-tessellation.ifc"], indirect=True)
+@pytest.mark.parametrize("geometry_library", ["opencascade", "cgal", "cgal-simple"])
+def test_correct_edges(file, geometry_library):
+    s = ifcopenshell.geom.settings()
+    obj = ifcopenshell.geom.create_shape(s, file[30], geometry_library=geometry_library)
+    vs = np.array(obj.geometry.verts).reshape((-1, 3))
+    eds = np.array(obj.geometry.edges).reshape((-1, 2))
+    edge_collection_1 = set(map(lambda t: frozenset(map(tuple, t)), (vs[eds] * 1000).tolist()))
+    rep = file[30].Representation.Representations[0].Items[0]
+    edge_collection_2 = set(get_edges(rep))
+    assert edge_collection_1 == edge_collection_2