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107 lines
3.5 KiB
Python
107 lines
3.5 KiB
Python
"""
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build123d imports
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name: test_bound_box.py
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by: Gumyr
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date: January 22, 2025
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desc:
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This python module contains tests for the build123d project.
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license:
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Copyright 2025 Gumyr
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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"""
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import unittest
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from build123d.geometry import BoundBox, Vector
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from build123d.topology import Solid, Vertex
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class TestBoundBox(unittest.TestCase):
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def test_basic_bounding_box(self):
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v = Vertex(1, 1, 1)
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v2 = Vertex(2, 2, 2)
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self.assertEqual(BoundBox, type(v.bounding_box()))
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self.assertEqual(BoundBox, type(v2.bounding_box()))
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bb1 = v.bounding_box().add(v2.bounding_box())
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# OCC uses some approximations
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self.assertAlmostEqual(bb1.size.X, 1.0, 1)
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self.assertAlmostEqual(bb1.measure, 1.0, 5)
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# Test adding to an existing bounding box
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v0 = Vertex(0, 0, 0)
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bb2 = v0.bounding_box().add(v.bounding_box())
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bb3 = bb1.add(bb2)
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self.assertAlmostEqual(bb3.size, (2, 2, 2), 7)
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self.assertAlmostEqual(bb3.measure, 8, 5)
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bb3 = bb2.add((3, 3, 3))
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self.assertAlmostEqual(bb3.size, (3, 3, 3), 7)
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bb3 = bb2.add(Vector(3, 3, 3))
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self.assertAlmostEqual(bb3.size, (3, 3, 3), 7)
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# Test 2D bounding boxes
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bb1 = Vertex(1, 1, 0).bounding_box().add(Vertex(2, 2, 0).bounding_box())
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bb2 = Vertex(0, 0, 0).bounding_box().add(Vertex(3, 3, 0).bounding_box())
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bb3 = Vertex(0, 0, 0).bounding_box().add(Vertex(1.5, 1.5, 0).bounding_box())
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self.assertAlmostEqual(bb2.measure, 9, 5)
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# Test that bb2 contains bb1
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self.assertEqual(bb2, BoundBox.find_outside_box_2d(bb1, bb2))
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self.assertEqual(bb2, BoundBox.find_outside_box_2d(bb2, bb1))
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# Test that neither bounding box contains the other
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self.assertIsNone(BoundBox.find_outside_box_2d(bb1, bb3))
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# Test creation of a bounding box from a shape - note the low accuracy comparison
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# as the box is a little larger than the shape
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bb1 = BoundBox.from_topo_ds(Solid.make_cylinder(1, 1).wrapped, optimal=False)
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self.assertAlmostEqual(bb1.size, (2, 2, 1), 1)
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bb2 = BoundBox.from_topo_ds(
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Solid.make_cylinder(0.5, 0.5).translate((0, 0, 0.1)).wrapped, optimal=False
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)
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self.assertTrue(bb2.is_inside(bb1))
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def test_bounding_box_repr(self):
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bb = Solid.make_box(1, 1, 1).bounding_box()
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self.assertEqual(
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repr(bb), "bbox: 0.0 <= x <= 1.0, 0.0 <= y <= 1.0, 0.0 <= z <= 1.0"
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)
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def test_center_of_boundbox(self):
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self.assertAlmostEqual(
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Solid.make_box(1, 1, 1).bounding_box().center(),
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(0.5, 0.5, 0.5),
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5,
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)
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def test_combined_center_of_boundbox(self):
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pass
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def test_clean_boundbox(self):
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s = Solid.make_sphere(3)
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self.assertAlmostEqual(s.bounding_box().size, (6, 6, 6), 5)
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s.mesh(1e-3)
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self.assertAlmostEqual(s.bounding_box().size, (6, 6, 6), 5)
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if __name__ == "__main__":
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unittest.main()
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