""" build123d imports name: test_wire.py by: Gumyr date: January 22, 2025 desc: This python module contains tests for the build123d project. license: Copyright 2025 Gumyr Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. """ import math import random import unittest import numpy as np from build123d.build_enums import Side from build123d.build_line import BuildLine from build123d.geometry import Axis, Color, Location, Plane, Vector from build123d.objects_curve import Line, PolarLine, Polyline, Spline from build123d.objects_sketch import Circle, Rectangle, RegularPolygon from build123d.operations_generic import fillet from build123d.topology import Edge, Face, Wire class TestWire(unittest.TestCase): def test_ellipse_arc(self): full_ellipse = Wire.make_ellipse(2, 1) half_ellipse = Wire.make_ellipse( 2, 1, start_angle=0, end_angle=180, closed=True ) self.assertAlmostEqual(full_ellipse.area / 2, half_ellipse.area, 5) def test_stitch(self): half_ellipse1 = Wire.make_ellipse( 2, 1, start_angle=0, end_angle=180, closed=False ) half_ellipse2 = Wire.make_ellipse( 2, 1, start_angle=180, end_angle=360, closed=False ) ellipse = half_ellipse1.stitch(half_ellipse2) self.assertEqual(len(ellipse.wires()), 1) def test_fillet_2d(self): square = Wire.make_rect(1, 1) squaroid = square.fillet_2d(0.1, square.vertices()) self.assertAlmostEqual( squaroid.length, 4 * (1 - 2 * 0.1) + 2 * math.pi * 0.1, 5 ) def test_chamfer_2d(self): square = Wire.make_rect(1, 1) squaroid = square.chamfer_2d(0.1, 0.1, square.vertices()) self.assertAlmostEqual( squaroid.length, 4 * (1 - 2 * 0.1 + 0.1 * math.sqrt(2)), 5 ) def test_chamfer_2d_edge(self): square = Wire.make_rect(1, 1) edge = square.edges().sort_by(Axis.Y)[0] vertex = edge.vertices().sort_by(Axis.X)[0] square = square.chamfer_2d( distance=0.1, distance2=0.2, vertices=[vertex], edge=edge ) self.assertAlmostEqual(square.edges().sort_by(Axis.Y)[0].length, 0.9) def test_make_convex_hull(self): # overlapping_edges = [ # Edge.make_circle(10, end_angle=60), # Edge.make_circle(10, start_angle=30, end_angle=90), # Edge.make_line((-10, 10), (10, -10)), # ] # with self.assertRaises(ValueError): # Wire.make_convex_hull(overlapping_edges) adjoining_edges = [ Edge.make_circle(10, end_angle=45), Edge.make_circle(10, start_angle=315, end_angle=360), Edge.make_line((-10, 10), (-10, -10)), ] hull_wire = Wire.make_convex_hull(adjoining_edges) self.assertAlmostEqual(Face(hull_wire).area, 319.9612, 4) # def test_fix_degenerate_edges(self): # # Can't find a way to create one # edge0 = Edge.make_line((0, 0, 0), (1, 0, 0)) # edge1 = Edge.make_line(edge0 @ 0, edge0 @ 0 + Vector(0, 1, 0)) # edge1a = edge1.trim(0, 1e-7) # edge1b = edge1.trim(1e-7, 1.0) # edge2 = Edge.make_line(edge1 @ 1, edge1 @ 1 + Vector(1, 1, 0)) # wire = Wire([edge0, edge1a, edge1b, edge2]) # fixed_wire = wire.fix_degenerate_edges(1e-6) # self.assertEqual(len(fixed_wire.edges()), 2) def test_trim(self): e0 = Edge.make_line((0, 0), (1, 0)) e1 = Edge.make_line((2, 0), (1, 0)) e2 = Edge.make_line((2, 0), (3, 0)) w1 = Wire([e0, e1, e2]) t1 = w1.trim(0.2, 0.9).move(Location((0, 0.1, 0))) self.assertAlmostEqual(t1.length, 2.1, 5) e = Edge.make_three_point_arc((0, -20), (5, 0), (0, 20)) # Three edges are created 0->0.5->0.75->1.0 o = e.offset_2d(10, side=Side.RIGHT, closed=False) t2 = o.trim(0.1, 0.9) self.assertAlmostEqual(t2.length, o.length * 0.8, 5) t3 = o.trim(0.5, 1.0) self.assertAlmostEqual(t3.length, o.length * 0.5, 5) t4 = o.trim(0.5, 0.75) self.assertAlmostEqual(t4.length, o.length * 0.25, 5) with self.assertRaises(ValueError): o.trim(0.75, 0.25) spline = Spline( (0, 0, 0), (0, 10, 0), tangents=((0, 0, 1), (0, 0, -1)), tangent_scalars=(2, 2), ) half = spline.trim(0.5, 1) self.assertAlmostEqual(spline @ 0.5, half @ 0, 4) self.assertAlmostEqual(spline @ 1, half @ 1, 4) w = Rectangle(3, 1).wire() t5 = w.trim(0, 0.5) self.assertAlmostEqual(t5.length, 4, 5) t6 = w.trim(0.5, 1) self.assertAlmostEqual(t6.length, 4, 5) p = RegularPolygon(10, 20).wire() t7 = p.trim(0.1, 0.2) self.assertAlmostEqual(p.length * 0.1, t7.length, 5) c = Circle(10).wire() t8 = c.trim(0.4, 0.9) self.assertAlmostEqual(c.length * 0.5, t8.length, 5) def test_param_at_point(self): e = Edge.make_three_point_arc((0, -20), (5, 0), (0, 20)) # Three edges are created 0->0.5->0.75->1.0 o = e.offset_2d(10, side=Side.RIGHT, closed=False) e0 = Edge.make_line((0, 0), (1, 0)) e1 = Edge.make_line((2, 0), (1, 0)) e2 = Edge.make_line((2, 0), (3, 0)) w1 = Wire([e0, e1, e2]) for wire in [o, w1]: u_value = random.random() position = wire.position_at(u_value) self.assertAlmostEqual(wire.param_at_point(position), u_value, 4) with self.assertRaises(ValueError): o.param_at_point((-1, 1)) with self.assertRaises(ValueError): w1.param_at_point((20, 20, 20)) def test_param_at_point_reversed_edges(self): with BuildLine(Plane.YZ) as wing_line: l1 = Line((0, 65), (80 / 2 + 1.526 * 4, 65)) PolarLine( l1 @ 1, 20.371288916, direction=Vector(0, 1, 0).rotate(Axis.X, -75) ) fillet(wing_line.vertices(), 7) w = wing_line.wire() params = [w.param_at_point(w @ (i / 20)) for i in range(21)] self.assertTrue(params == sorted(params)) for i, param in enumerate(params): self.assertAlmostEqual(param, i / 20, 6) def test_tangent_at_reversed_edges(self): with BuildLine(Plane.YZ) as wing_line: l1 = Line((0, 65), (80 / 2 + 1.526 * 4, 65)) PolarLine( l1 @ 1, 20.371288916, direction=Vector(0, 1, 0).rotate(Axis.X, -75) ) fillet(wing_line.vertices(), 7) w = wing_line.wire() self.assertAlmostEqual( w.tangent_at(0), (0, -0.2588190451025, 0.9659258262891), 6 ) self.assertAlmostEqual(w.tangent_at(1), (0, -1, 0), 6) def test_order_edges(self): w1 = Wire( [ Edge.make_line((0, 0), (1, 0)), Edge.make_line((1, 1), (1, 0)), Edge.make_line((0, 1), (1, 1)), ] ) ordered_edges = w1.order_edges() self.assertAlmostEqual(ordered_edges[0] @ 0, (0, 0, 0), 5) self.assertAlmostEqual(ordered_edges[1] @ 0, (1, 0, 0), 5) self.assertAlmostEqual(ordered_edges[2] @ 0, (1, 1, 0), 5) def test_constructor(self): e0 = Edge.make_line((0, 0), (1, 0)) e1 = Edge.make_line((1, 0), (1, 1)) w0 = Wire.make_circle(1) w1 = Wire(e0) self.assertTrue(w1.is_valid) w2 = Wire([e0]) self.assertAlmostEqual(w2.length, 1, 5) self.assertTrue(w2.is_valid) w3 = Wire([e0, e1]) self.assertTrue(w3.is_valid) self.assertAlmostEqual(w3.length, 2, 5) w4 = Wire(w0.wrapped) self.assertTrue(w4.is_valid) w5 = Wire(obj=w0.wrapped) self.assertTrue(w5.is_valid) w6 = Wire(obj=w0.wrapped, label="w6", color=Color("red")) self.assertTrue(w6.is_valid) self.assertEqual(w6.label, "w6") np.testing.assert_allclose(tuple(w6.color), (1.0, 0.0, 0.0, 1.0), 1e-5) w7 = Wire(w6) self.assertTrue(w7.is_valid) c0 = Polyline((0, 0), (1, 0), (1, 1)) w8 = Wire(c0) self.assertTrue(w8.is_valid) with self.assertRaises(ValueError): Wire(bob="fred") if __name__ == "__main__": unittest.main()