mirror of
https://github.com/gumyr/build123d.git
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241 lines
9 KiB
Python
241 lines
9 KiB
Python
import unittest, uuid
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from packaging.specifiers import SpecifierSet
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from pathlib import Path
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from os import fsdecode, fsencode
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import sys
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import tempfile
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import pytest
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from build123d.build_enums import MeshType, Unit
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from build123d.build_part import BuildPart
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from build123d.build_sketch import BuildSketch
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from build123d.exporters3d import export_stl
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from build123d.objects_part import Box, Cylinder
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from build123d.objects_sketch import Rectangle
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from build123d.operations_part import extrude
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from build123d.topology import Compound, Solid
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from build123d.geometry import Axis, Color, Location, Vector, VectorLike
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from build123d.mesher import Mesher
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def temp_3mf_file():
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caller = sys._getframe(1)
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prefix = f"build123d_{caller.f_locals.get('self').__class__.__name__}_{caller.f_code.co_name}"
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return tempfile.mktemp(suffix=".3mf", prefix=prefix)
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class DirectApiTestCase(unittest.TestCase):
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def assertTupleAlmostEquals(
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self,
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first: tuple[float, ...],
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second: tuple[float, ...],
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places: int,
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msg: str = None,
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):
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"""Check Tuples"""
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self.assertEqual(len(second), len(first))
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for i, j in zip(second, first):
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self.assertAlmostEqual(i, j, places, msg=msg)
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def assertVectorAlmostEquals(
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self, first: Vector, second: VectorLike, places: int, msg: str = None
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):
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second_vector = Vector(second)
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self.assertAlmostEqual(first.X, second_vector.X, places, msg=msg)
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self.assertAlmostEqual(first.Y, second_vector.Y, places, msg=msg)
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self.assertAlmostEqual(first.Z, second_vector.Z, places, msg=msg)
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class TestProperties(unittest.TestCase):
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def test_version(self):
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exporter = Mesher()
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assert exporter.library_version in SpecifierSet(">= 2.3.1")
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def test_units(self):
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for unit in Unit:
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filename = temp_3mf_file()
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exporter = Mesher(unit=unit)
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exporter.add_shape(Solid.make_box(1, 1, 1))
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exporter.write(filename)
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importer = Mesher()
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_shape = importer.read(filename)
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self.assertEqual(unit, importer.model_unit)
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def test_vertex_and_triangle_counts(self):
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exporter = Mesher()
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exporter.add_shape(Solid.make_box(1, 1, 1))
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self.assertEqual(exporter.vertex_counts[0], 8)
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self.assertEqual(exporter.triangle_counts[0], 12)
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def test_mesh_counts(self):
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exporter = Mesher()
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exporter.add_shape(Solid.make_box(1, 1, 1))
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exporter.add_shape(Solid.make_cone(1, 0, 2))
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self.assertEqual(exporter.mesh_count, 2)
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class TestMetaData(unittest.TestCase):
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def test_add_meta_data(self):
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exporter = Mesher()
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exporter.add_shape(Solid.make_box(1, 1, 1))
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exporter.add_meta_data("test_space", "test0", "some data", "str", True)
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exporter.add_meta_data("test_space", "test1", "more data", "str", True)
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filename = temp_3mf_file()
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exporter.write(filename)
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importer = Mesher()
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_shape = importer.read(filename)
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imported_meta_data: list[dict] = importer.get_meta_data()
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self.assertEqual(imported_meta_data[0]["name_space"], "test_space")
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self.assertEqual(imported_meta_data[0]["name"], "test0")
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self.assertEqual(imported_meta_data[0]["value"], "some data")
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self.assertEqual(imported_meta_data[0]["type"], "str")
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self.assertEqual(imported_meta_data[1]["name_space"], "test_space")
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self.assertEqual(imported_meta_data[1]["name"], "test1")
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self.assertEqual(imported_meta_data[1]["value"], "more data")
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self.assertEqual(imported_meta_data[1]["type"], "str")
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def test_add_code(self):
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exporter = Mesher()
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exporter.add_shape(Solid.make_box(1, 1, 1))
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exporter.add_code_to_metadata()
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filename = temp_3mf_file()
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exporter.write(filename)
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importer = Mesher()
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_shape = importer.read(filename)
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source_code = importer.get_meta_data_by_key("build123d", "test_mesher.py")
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self.assertEqual(len(source_code), 2)
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self.assertEqual(source_code["type"], "python")
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self.assertGreater(len(source_code["value"]), 10)
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class TestMeshProperties(unittest.TestCase):
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def test_properties(self):
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# Note: MeshType.OTHER can't be used with a Solid shape
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for mesh_type in [MeshType.MODEL, MeshType.SUPPORT, MeshType.SOLIDSUPPORT]:
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with self.subTest("MeshTYpe", mesh_type=mesh_type):
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exporter = Mesher()
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if mesh_type != MeshType.SUPPORT:
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test_uuid = uuid.uuid1()
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else:
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test_uuid = None
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name = "test" + mesh_type.name
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shape = Solid.make_box(1, 1, 1)
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shape.label = name
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exporter.add_shape(
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shape,
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mesh_type=mesh_type,
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part_number=str(mesh_type.value),
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uuid_value=test_uuid,
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)
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filename = temp_3mf_file()
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exporter.write(filename)
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importer = Mesher()
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shape = importer.read(filename)
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self.assertEqual(shape[0].label, name)
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self.assertEqual(importer.mesh_count, 1)
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properties = importer.get_mesh_properties()
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self.assertEqual(properties[0]["name"], name)
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self.assertEqual(properties[0]["part_number"], str(mesh_type.value))
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self.assertEqual(properties[0]["type"], mesh_type.name)
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if mesh_type != MeshType.SUPPORT:
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self.assertEqual(properties[0]["uuid"], str(test_uuid))
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class TestAddShape(DirectApiTestCase):
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def test_add_shape(self):
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exporter = Mesher()
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blue_shape = Solid.make_box(1, 1, 1)
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blue_shape.color = Color("blue")
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blue_shape.label = "blue"
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red_shape = Solid.make_cone(1, 0, 2).locate(Location((0, -1, 0)))
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red_shape.color = Color("red")
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red_shape.label = "red"
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exporter.add_shape([blue_shape, red_shape])
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filename = temp_3mf_file()
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exporter.write(filename)
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importer = Mesher()
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box, cone = importer.read(filename)
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self.assertVectorAlmostEquals(box.bounding_box().size, (1, 1, 1), 2)
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self.assertVectorAlmostEquals(box.bounding_box().size, (1, 1, 1), 2)
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self.assertEqual(len(box.clean().faces()), 6)
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self.assertEqual(box.label, "blue")
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self.assertEqual(cone.label, "red")
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self.assertTupleAlmostEquals(tuple(box.color), (0, 0, 1, 1), 5)
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self.assertTupleAlmostEquals(tuple(cone.color), (1, 0, 0, 1), 5)
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def test_add_compound(self):
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exporter = Mesher()
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box = Solid.make_box(1, 1, 1)
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cone = Solid.make_cone(1, 0, 2).locate(Location((0, -1, 0)))
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shape_assembly = Compound([box, cone])
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exporter.add_shape(shape_assembly)
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filename = temp_3mf_file()
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exporter.write(filename)
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importer = Mesher()
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shapes = importer.read(filename)
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self.assertEqual(importer.mesh_count, 2)
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class TestErrorChecking(unittest.TestCase):
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def test_read_invalid_file(self):
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with self.assertRaises(ValueError):
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importer = Mesher()
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importer.read("unknown_file.type")
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def test_write_invalid_file(self):
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exporter = Mesher()
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exporter.add_shape(Solid.make_box(1, 1, 1))
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with self.assertRaises(ValueError):
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exporter.write("unknown_file.type")
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class TestDuplicateVertices(unittest.TestCase):
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def test_duplicate_vertices(self):
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with BuildPart() as funky_box:
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Box(3, 3, 3)
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with BuildSketch(funky_box.faces().sort_by(Axis.Z)[-1]):
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Rectangle(1, 2, rotation=45)
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extrude(amount=1)
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exporter = Mesher(unit=Unit.CM)
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exporter.add_shape(funky_box.part) # dual vertices raise exception here
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class TestHollowImport(unittest.TestCase):
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def test_hollow_import(self):
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test_shape = Cylinder(5, 10) - Box(5, 5, 5)
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export_stl(test_shape, "test.stl")
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importer = Mesher()
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stl = importer.read("test.stl")
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self.assertTrue(stl[0].is_valid)
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class TestImportDegenerateTriangles(unittest.TestCase):
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def test_degenerate_import(self):
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"""Some STLs may contain 'triangles' where all three points are on a line"""
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importer = Mesher()
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try:
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stl = importer.read("tests/cyl_w_rect_hole.stl")[0]
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except:
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stl = importer.read("cyl_w_rect_hole.stl")[0]
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self.assertEqual(type(stl), Solid)
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self.assertTrue(stl.is_manifold)
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self.assertTrue(stl.is_valid)
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self.assertEqual(sum(f.area == 0 for f in stl.faces()), 0)
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@pytest.mark.parametrize(
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"format", (Path, fsencode, fsdecode), ids=["path", "bytes", "str"]
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)
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def test_pathlike_mesher(tmp_path, format):
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filename = temp_3mf_file()
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path = format(tmp_path / filename)
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exporter, importer = Mesher(), Mesher()
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exporter.add_shape(Solid.make_box(1, 1, 1))
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exporter.write(path)
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importer.read(path)
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if __name__ == "__main__":
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unittest.main()
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