def test_stl_importer_2_boxes():
r"""Import an iges file containing 2 distinct boxes and test topology
Notes
-----
This shows the current limitations of the IgesImporter as 2 boxes cannot be distinguished from one another
"""
# binary STL
importer = StlImporter(path_from_file(__file__, "./models_in/2_boxes_binary.stl"))
topo = Topo(importer.shape)
assert len([i for i in topo.shells()]) == 2
assert topo.shells().next().Closed() is True
assert [i for i in topo.shells()][1].Closed() is True
assert topo.number_of_faces() == 108 * 2
assert topo.number_of_edges() == 162 * 2
# ascii STL
importer = StlImporter(path_from_file(__file__, "./models_in/2_boxes_ascii.stl"))
topo = Topo(importer.shape)
assert len([i for i in topo.shells()]) == 2
assert topo.shells().next().Closed() is True
assert [i for i in topo.shells()][1].Closed() is True
assert topo.number_of_faces() == 108 * 2
assert topo.number_of_edges() == 162 * 2
def test_iges_importer_happy_topology():
r"""import iges file containing a box and test topology"""
importer = IgesImporter(path_from_file(__file__, "./models_in/box.igs"))
topo = Topo(importer.compound)
assert topo.number_of_faces() == 6
assert topo.number_of_edges() == 24 # 12 edges * 2 possible orientations ?
def test_iges_importer_2_boxes():
r"""Import an iges file containing 2 distinct boxes and test topology
Notes
-----
This shows the current limitations of the IgesImporter as 2 boxes cannot be distinguished from one another
"""
importer = IgesImporter(path_from_file(__file__, "./models_in/2_boxes.igs"))
topo = Topo(importer.compound)
assert topo.number_of_faces() == 6 * 2
assert topo.number_of_edges() == 24 * 2
def test_step_exporter_overwrite(box_shape):
r"""Happy path with a subclass of TopoDS_Shape"""
filename = path_from_file(__file__, "./models_out/box.stp")
exporter = StepExporter(filename)
solid = shape_to_topology(box_shape)
assert isinstance(solid, TopoDS.TopoDS_Solid)
exporter.add_shape(solid)
exporter.write_file()
initial_timestamp = os.path.getmtime(filename)
assert os.path.isfile(filename)
# read the written box.stp
importer = StepImporter(filename)
topo_compound = Topo(importer.compound)
assert topo_compound.number_of_faces() == 6
assert len([i for i in topo_compound.faces()]) == 6
assert topo_compound.number_of_edges() == 12
# add a sphere and write again with same exporter
sphere = BRepPrimAPI.BRepPrimAPI_MakeSphere(10)
exporter.add_shape(sphere.Shape())
exporter.write_file() # this creates a file with a box and a sphere
intermediate_timestamp = os.path.getmtime(filename)
assert intermediate_timestamp >= initial_timestamp
# check that the file contains the box and the sphere
importer = StepImporter(filename)
assert len([i for i in Topo(importer.compound).faces()]) == 7 # 6 from box + 1 from sphere
assert len([i for i in Topo(importer.compound).solids()]) == 2
# create a new exporter and overwrite with a box only
filename = path_from_file(__file__, "./models_out/box.stp")
exporter = StepExporter(filename)
solid = shape_to_topology(box_shape)
exporter.add_shape(solid)
exporter.write_file()
assert os.path.isfile(filename)
last_timestamp = os.path.getmtime(filename)
assert last_timestamp >= intermediate_timestamp
# check the file only contains a box
importer = StepImporter(filename)
assert len([i for i in Topo(importer.compound).faces()]) == 6 # 6 from box
assert len([i for i in Topo(importer.compound).solids()]) == 1
