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501 lines
19 KiB
Python
501 lines
19 KiB
Python
"""
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build123d imports
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name: test_mixin1_d.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 math
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import unittest
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from build123d.build_enums import (
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CenterOf,
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FrameMethod,
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GeomType,
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PositionMode,
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Side,
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SortBy,
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)
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from build123d.geometry import Axis, Location, Plane, Rot, Vector, TOLERANCE
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from build123d.objects_curve import CenterArc, Line, Polyline
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from build123d.objects_part import Box, Cylinder
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from build123d.operations_part import extrude
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from build123d.operations_generic import fillet
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from build123d.topology import Compound, Edge, Face, Solid, Vertex, Wire
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class TestMixin1D(unittest.TestCase):
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"""Test the add in methods"""
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def test_position_at(self):
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self.assertAlmostEqual(
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Edge.make_line((0, 0, 0), (1, 1, 1)).position_at(0.5),
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(0.5, 0.5, 0.5),
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5,
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)
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# Not sure what PARAMETER mode returns - but it's in the ballpark
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point = Edge.make_line((0, 0, 0), (1, 1, 1)).position_at(
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0.5, position_mode=PositionMode.PARAMETER
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)
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self.assertTrue(all([0.0 < v < 1.0 for v in point]))
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wire = Wire([Edge.make_line((0, 0, 0), (10, 0, 0))])
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self.assertAlmostEqual(wire.position_at(0.3), (3, 0, 0), 5)
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self.assertAlmostEqual(
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wire.position_at(3, position_mode=PositionMode.LENGTH), (3, 0, 0), 5
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)
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self.assertAlmostEqual(wire.edge().position_at(0.3), (3, 0, 0), 5)
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self.assertAlmostEqual(
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wire.edge().position_at(3, position_mode=PositionMode.LENGTH), (3, 0, 0), 5
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)
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circle_wire = Wire(
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[
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Edge.make_circle(1, start_angle=0, end_angle=180),
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Edge.make_circle(1, start_angle=180, end_angle=360),
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]
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)
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p1 = circle_wire.position_at(math.pi, position_mode=PositionMode.LENGTH)
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p2 = circle_wire.position_at(math.pi / circle_wire.length)
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self.assertAlmostEqual(p1, (-1, 0, 0), 14)
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self.assertAlmostEqual(p2, (-1, 0, 0), 14)
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self.assertAlmostEqual(p1, p2, 14)
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circle_edge = Edge.make_circle(1)
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p3 = circle_edge.position_at(math.pi, position_mode=PositionMode.LENGTH)
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p4 = circle_edge.position_at(math.pi / circle_edge.length)
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self.assertAlmostEqual(p3, (-1, 0, 0), 14)
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self.assertAlmostEqual(p4, (-1, 0, 0), 14)
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self.assertAlmostEqual(p3, p4, 14)
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circle = Wire(
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[
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Edge.make_circle(2, start_angle=0, end_angle=180),
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Edge.make_circle(2, start_angle=180, end_angle=360),
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]
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)
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self.assertAlmostEqual(
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circle.position_at(0.5),
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(-2, 0, 0),
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5,
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)
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self.assertAlmostEqual(
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circle.position_at(2 * math.pi, position_mode=PositionMode.LENGTH),
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(-2, 0, 0),
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5,
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)
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def test_positions(self):
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e = Edge.make_line((0, 0, 0), (1, 1, 1))
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distances = [i / 4 for i in range(3)]
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pts = e.positions(distances)
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for i, position in enumerate(pts):
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self.assertAlmostEqual(position, (i / 4, i / 4, i / 4), 5)
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def test_tangent_at(self):
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self.assertAlmostEqual(
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Edge.make_circle(1, start_angle=0, end_angle=90).tangent_at(1.0),
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(-1, 0, 0),
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5,
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)
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tangent = Edge.make_circle(1, start_angle=0, end_angle=90).tangent_at(
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0.0, position_mode=PositionMode.PARAMETER
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)
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self.assertTrue(all([0.0 <= v <= 1.0 for v in tangent]))
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self.assertAlmostEqual(
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Edge.make_circle(1, start_angle=0, end_angle=180).tangent_at(
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math.pi / 2, position_mode=PositionMode.LENGTH
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),
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(-1, 0, 0),
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5,
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)
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def test_tangent_at_point(self):
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circle = Wire(
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[
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Edge.make_circle(1, start_angle=0, end_angle=180),
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Edge.make_circle(1, start_angle=180, end_angle=360),
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]
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)
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pnt_on_circle = Vector(math.cos(math.pi / 4), math.sin(math.pi / 4))
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tan = circle.tangent_at(pnt_on_circle)
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self.assertAlmostEqual(tan, (-math.sqrt(2) / 2, math.sqrt(2) / 2), 5)
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def test_tangent_at_by_length(self):
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circle = Edge.make_circle(1)
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tan = circle.tangent_at(circle.length * 0.5, position_mode=PositionMode.LENGTH)
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self.assertAlmostEqual(tan, (0, -1), 5)
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def test_tangent_at_error(self):
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with self.assertRaises(ValueError):
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Edge.make_circle(1).tangent_at("start")
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def test_normal(self):
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self.assertAlmostEqual(
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Edge.make_circle(
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1, Plane(origin=(0, 0, 0), z_dir=(1, 0, 0)), start_angle=0, end_angle=60
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).normal(),
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(1, 0, 0),
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5,
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)
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self.assertAlmostEqual(
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Edge.make_ellipse(
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1,
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0.5,
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Plane(origin=(0, 0, 0), z_dir=(1, 1, 0)),
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start_angle=0,
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end_angle=90,
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).normal(),
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(math.sqrt(2) / 2, math.sqrt(2) / 2, 0),
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5,
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)
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self.assertAlmostEqual(
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Edge.make_spline(
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[
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(1, 0),
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(math.sqrt(2) / 2, math.sqrt(2) / 2),
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(0, 1),
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],
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tangents=((0, 1, 0), (-1, 0, 0)),
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).normal(),
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(0, 0, 1),
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5,
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)
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line = Edge.make_line((0, 0, 0), (1, 1, 1))
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with self.assertRaises(ValueError):
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line.normal()
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line.wrapped = None
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with self.assertRaises(ValueError):
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line.normal()
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def test_center(self):
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c = Edge.make_circle(1, start_angle=0, end_angle=180)
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self.assertAlmostEqual(c.center(), (0, 1, 0), 5)
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self.assertAlmostEqual(
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c.center(CenterOf.MASS),
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(0, 0.6366197723675814, 0),
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5,
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)
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self.assertAlmostEqual(c.center(CenterOf.BOUNDING_BOX), (0, 0.5, 0), 5)
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c.wrapped = None
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with self.assertRaises(ValueError):
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c.center()
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def test_location_at(self):
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loc = Edge.make_circle(1).location_at(0.25)
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self.assertAlmostEqual(loc.position, (0, 1, 0), 5)
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self.assertAlmostEqual(loc.orientation, (0, -90, -90), 5)
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loc = Edge.make_circle(1).location_at(
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math.pi / 2, position_mode=PositionMode.LENGTH
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)
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self.assertAlmostEqual(loc.position, (0, 1, 0), 5)
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self.assertAlmostEqual(loc.orientation, (0, -90, -90), 5)
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def test_location_at_x_dir(self):
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path = Polyline((-50, -40), (50, -40), (50, 40), (-50, 40), close=True)
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l1 = path.location_at(0)
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l2 = path.location_at(0, x_dir=(0, 1, 0))
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self.assertAlmostEqual(l1.position, l2.position, 5)
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self.assertAlmostEqual(l1.z_axis, l2.z_axis, 5)
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self.assertNotEqual(l1.x_axis, l2.x_axis, 5)
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self.assertAlmostEqual(l2.x_axis, Axis(path @ 0, (0, 1, 0)), 5)
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with self.assertRaises(ValueError):
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path.location_at(0, x_dir=(1, 0, 0))
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def test_locations(self):
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locs = Edge.make_circle(1).locations([i / 4 for i in range(4)])
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self.assertAlmostEqual(locs[0].position, (1, 0, 0), 5)
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self.assertAlmostEqual(locs[0].orientation, (-90, 0, -180), 5)
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self.assertAlmostEqual(locs[1].position, (0, 1, 0), 5)
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self.assertAlmostEqual(locs[1].orientation, (0, -90, -90), 5)
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self.assertAlmostEqual(locs[2].position, (-1, 0, 0), 5)
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self.assertAlmostEqual(locs[2].orientation, (90, 0, 0), 5)
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self.assertAlmostEqual(locs[3].position, (0, -1, 0), 5)
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self.assertAlmostEqual(locs[3].orientation, (0, 90, 90), 5)
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def test_location_at_corrected_frenet(self):
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# A polyline with sharp corners — problematic for classic Frenet
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path = Polyline((0, 0), (10, 0), (10, 10), (0, 10))
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# Request multiple locations along the curve
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locations = [
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path.location_at(t, frame_method=FrameMethod.CORRECTED)
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for t in [0.0, 0.25, 0.5, 0.75, 1.0]
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]
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# Ensure all locations were created and have consistent orientation
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self.assertTrue(
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all(
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locations[0].x_axis.direction == l.x_axis.direction
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for l in locations[1:]
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)
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)
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# Check that Z-axis is approximately orthogonal to X-axis
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for loc in locations:
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self.assertLess(abs(loc.z_axis.direction.dot(loc.x_axis.direction)), 1e-6)
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# Check continuity of rotation (not flipping wildly)
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# Check angle between x_axes doesn't flip more than ~90 degrees
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angles = []
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for i in range(len(locations) - 1):
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a1 = locations[i].x_axis.direction
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a2 = locations[i + 1].x_axis.direction
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angle = a1.get_angle(a2)
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angles.append(angle)
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self.assertTrue(all(abs(angle) < 90 for angle in angles))
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def test_project(self):
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target = Face.make_rect(10, 10, Plane.XY.rotated((0, 45, 0)))
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circle = Edge.make_circle(1).locate(Location((0, 0, 10)))
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ellipse: Wire = circle.project(target, (0, 0, -1))
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bbox = ellipse.bounding_box()
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self.assertAlmostEqual(bbox.min, (-1, -1, -1), 5)
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self.assertAlmostEqual(bbox.max, (1, 1, 1), 5)
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circle.wrapped = None
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with self.assertRaises(ValueError):
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circle.project(target, (0, 0, -1))
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def test_project2(self):
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target = Cylinder(1, 10).faces().filter_by(GeomType.PLANE, reverse=True)[0]
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square = Wire.make_rect(1, 1, Plane.YZ).locate(Location((10, 0, 0)))
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projections: list[Wire] = square.project(
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target, direction=(-1, 0, 0), closest=False
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)
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self.assertEqual(len(projections), 2)
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def test_is_forward(self):
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plate = Box(10, 10, 1) - Cylinder(1, 1)
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hole_edges = plate.edges().filter_by(GeomType.CIRCLE)
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self.assertTrue(hole_edges.sort_by(Axis.Z)[-1].is_forward)
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self.assertFalse(hole_edges.sort_by(Axis.Z)[0].is_forward)
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e = Edge.make_line((0, 0), (1, 0))
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e.wrapped = None
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with self.assertRaises(ValueError):
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e.is_forward
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def test_offset_2d(self):
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base_wire = Wire.make_polygon([(0, 0), (1, 0), (1, 1)], close=False)
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corner = base_wire.vertices().group_by(Axis.Y)[0].sort_by(Axis.X)[-1]
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base_wire = base_wire.fillet_2d(0.4, [corner])
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offset_wire = base_wire.offset_2d(0.1, side=Side.LEFT)
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self.assertTrue(offset_wire.is_closed)
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self.assertEqual(len(offset_wire.edges().filter_by(GeomType.LINE)), 6)
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self.assertEqual(len(offset_wire.edges().filter_by(GeomType.CIRCLE)), 2)
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offset_wire_right = base_wire.offset_2d(0.1, side=Side.RIGHT)
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self.assertAlmostEqual(
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offset_wire_right.edges()
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.filter_by(GeomType.CIRCLE)
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.sort_by(SortBy.RADIUS)[-1]
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.radius,
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0.5,
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4,
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)
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h_perimeter = Compound.make_text("h", font_size=10).wire()
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with self.assertRaises(RuntimeError):
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h_perimeter.offset_2d(-1)
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# Test for returned Edge - can't find a way to do this
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# base_edge = Edge.make_circle(10, start_angle=40, end_angle=50)
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# self.assertTrue(isinstance(offset_edge, Edge))
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# offset_edge = base_edge.offset_2d(2, side=Side.RIGHT, closed=False)
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# self.assertTrue(offset_edge.geom_type == GeomType.CIRCLE)
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# self.assertAlmostEqual(offset_edge.radius, 12, 5)
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# base_edge = Edge.make_line((0, 1), (1, 10))
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# offset_edge = base_edge.offset_2d(2, side=Side.RIGHT, closed=False)
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# self.assertTrue(isinstance(offset_edge, Edge))
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# self.assertTrue(offset_edge.geom_type == GeomType.LINE)
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# self.assertAlmostEqual(offset_edge.position_at(0).X, 3)
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def test_common_plane(self):
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# Straight and circular lines
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l = Edge.make_line((0, 0, 0), (5, 0, 0))
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c = Edge.make_circle(2, Plane.XZ, -90, 90)
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common = l.common_plane(c)
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self.assertAlmostEqual(common.z_dir.X, 0, 5)
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self.assertAlmostEqual(abs(common.z_dir.Y), 1, 5) # the direction isn't known
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self.assertAlmostEqual(common.z_dir.Z, 0, 5)
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# Co-axial straight lines
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l1 = Edge.make_line((0, 0), (1, 1))
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l2 = Edge.make_line((0.25, 0.25), (0.75, 0.75))
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common = l1.common_plane(l2)
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# the z_dir isn't know
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self.assertAlmostEqual(common.x_dir.Z, 0, 5)
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# Parallel lines
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l1 = Edge.make_line((0, 0), (1, 0))
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l2 = Edge.make_line((0, 1), (1, 1))
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common = l1.common_plane(l2)
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self.assertAlmostEqual(common.z_dir.X, 0, 5)
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self.assertAlmostEqual(common.z_dir.Y, 0, 5)
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self.assertAlmostEqual(abs(common.z_dir.Z), 1, 5) # the direction isn't known
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# Many lines
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common = Edge.common_plane(*Wire.make_rect(10, 10).edges())
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self.assertAlmostEqual(common.z_dir.X, 0, 5)
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self.assertAlmostEqual(common.z_dir.Y, 0, 5)
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self.assertAlmostEqual(abs(common.z_dir.Z), 1, 5) # the direction isn't known
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# Wire and Edges
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c = Wire.make_circle(1, Plane.YZ)
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lines = Wire.make_rect(2, 2, Plane.YZ).edges()
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common = c.common_plane(*lines)
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self.assertAlmostEqual(abs(common.z_dir.X), 1, 5) # the direction isn't known
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self.assertAlmostEqual(common.z_dir.Y, 0, 5)
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self.assertAlmostEqual(common.z_dir.Z, 0, 5)
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def test_edge_volume(self):
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edge = Edge.make_line((0, 0), (1, 1))
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self.assertAlmostEqual(edge.volume, 0, 5)
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def test_wire_volume(self):
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wire = Wire.make_rect(1, 1)
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self.assertAlmostEqual(wire.volume, 0, 5)
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def test_edges(self):
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box = Solid.make_box(1, 1, 1)
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top_x = box.faces().sort_by(Axis.Z)[-1].edges().sort_by(Axis.X)[-1]
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self.assertEqual(top_x.topo_parent, box)
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self.assertTrue(isinstance(top_x, Edge))
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self.assertAlmostEqual(top_x.center(), (1, 0.5, 1), 5)
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def test_edges_topo_parent(self):
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phone_case_plan = Face.make_rect(80, 150) - Face.make_rect(
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25, 25, Plane((-20, 55))
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)
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phone_case = extrude(phone_case_plan, 2)
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window_edges = phone_case.faces().sort_by(Axis.Z)[-1].inner_wires()[0].edges()
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for e in window_edges:
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self.assertEqual(e.topo_parent, phone_case)
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phone_case_f = fillet(window_edges, 1)
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self.assertLess(phone_case_f.volume, phone_case.volume)
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perimeter = phone_case_f.faces().sort_by(Axis.Z)[-1].outer_wire().edges()
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for e in perimeter:
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self.assertEqual(e.topo_parent, phone_case_f)
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phone_case_ff = fillet(perimeter, 1)
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self.assertLess(phone_case_ff.volume, phone_case_f.volume)
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def test_is_closed(self):
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self.assertTrue(Edge.make_circle(1).is_closed)
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self.assertTrue(Face.make_rect(1, 1).outer_wire().is_closed)
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self.assertFalse(Edge.make_line((0, 0), (1, 0)).is_closed)
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e = Edge.make_circle(1)
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e.wrapped = None
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with self.assertRaises(ValueError):
|
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e.is_closed
|
|
|
|
def test_add(self):
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e = Edge.make_line((0, 0), (1, 0))
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|
e_plus = e + None
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self.assertTrue(e.is_same(e_plus))
|
|
|
|
def test_derivative_at(self):
|
|
self.assertAlmostEqual(
|
|
Edge.make_line((0, 0), (1, 0)).derivative_at((0, 0), 2), (0, 0, 0), 5
|
|
)
|
|
|
|
def test_project_to_viewport(self):
|
|
line = Edge.make_line((0, 0), (1, 0))
|
|
line.wrapped = None
|
|
with self.assertRaises(ValueError):
|
|
line.project_to_viewport((0, 0, 0))
|
|
|
|
def test_split(self):
|
|
line = Edge.make_line((0, 0), (1, 0))
|
|
line.wrapped = None
|
|
with self.assertRaises(ValueError):
|
|
line.split(Plane.XZ.offset(0.5))
|
|
|
|
def test_extrude(self):
|
|
pnt = Vertex(1, 0, 0)
|
|
pnt.wrapped = None
|
|
with self.assertRaises(ValueError):
|
|
Edge.extrude(pnt, (0, 0, 1))
|
|
|
|
|
|
class TestCurvatureComb(unittest.TestCase):
|
|
def test_raises_if_not_on_XY(self):
|
|
line_xz = Polyline((0, 0, 0), (1, 0, 0), (0, 0, 1))
|
|
with self.assertRaises(ValueError):
|
|
_ = line_xz.curvature_comb()
|
|
|
|
def test_empty_curve(self):
|
|
c = CenterArc((0, 0), 1, 0, 360)
|
|
c.wrapped = None
|
|
with self.assertRaises(ValueError):
|
|
c.curvature_comb()
|
|
|
|
def test_circle_constant_height_and_count(self):
|
|
radius = 5.0
|
|
count = 64
|
|
max_tooth = 2.0
|
|
|
|
# A closed circle in the XY plane
|
|
c = CenterArc((0, 0), radius, 0, 360)
|
|
comb = c.curvature_comb(count=count, max_tooth_size=max_tooth)
|
|
|
|
# For a closed curve, endpoint is excluded but the method still returns `count` samples.
|
|
self.assertEqual(len(comb), count)
|
|
|
|
# On a circle, kappa = 1/R => all teeth should have the same length = max_tooth
|
|
lengths = [edge.length for edge in comb]
|
|
self.assertTrue(all(abs(L - max_tooth) <= TOLERANCE for L in lengths))
|
|
|
|
# Direction check: teeth should be radial (perpendicular to tangent),
|
|
# i.e., aligned with (start_point - center). For Circle(...) center is (0,0,0).
|
|
center = Vector(0, 0, 0)
|
|
for edge in comb[:: max(1, len(comb) // 8)]: # sample a few
|
|
p0 = edge.position_at(0.0)
|
|
p1 = edge.position_at(1.0)
|
|
tooth_dir = (p1 - p0).normalized()
|
|
radial = (p0 - center).normalized()
|
|
# allow either direction (outward/inward), check colinearity
|
|
cross_len = tooth_dir.cross(radial).length
|
|
self.assertLessEqual(cross_len, 1e-3)
|
|
|
|
def test_line_near_zero_teeth_and_count(self):
|
|
# Straight segment in XY => curvature = 0 everywhere
|
|
line = Line((0, 0), (10, 0))
|
|
|
|
count = 25
|
|
comb = line.curvature_comb(count=count, max_tooth_size=3.0)
|
|
|
|
self.assertEqual(len(comb), 0) # They are 0 length so skipped
|
|
|
|
def test_open_arc_count_and_variation(self):
|
|
# Open arc: teeth count == requested count; lengths not constant in general
|
|
arc = CenterArc((0, 0), 5, 0, 180) # open, CCW half-circle
|
|
count = 40
|
|
comb = arc.curvature_comb(count=count, max_tooth_size=1.0)
|
|
self.assertEqual(len(comb), count)
|
|
# For a circular arc, curvature is constant, so lengths should still be constant
|
|
lengths = [e.length for e in comb]
|
|
self.assertLessEqual(max(lengths) - min(lengths), 1e-6)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|