def test_inwards(self):
w = Polygon([
Point(0, 0),
Point(0, 2),
Point(1, 2),
Point(1, 1),
Point(2, 1),
Point(2, 2),
Point(3, 2),
Point(3, 1),
Point(4, 1),
Point(4, 2),
Point(5, 2),
Point(5, 0),
])
down = Vector(0, -1)
up = Vector(0, 1)
left = Vector(-1, 0)
right = Vector(1, 0)
directions = [
right, down, left, down, right, down, left, down, right, down,
left, up
]
for s, d in zip(w.segments(), directions):
self.assertEqual(w.inwards(s), d)
def test_v_counter(self):
v = Polygon([
Point(2, 0),
Point(0, 4),
Point(1, 4),
Point(2, 1),
Point(3, 4),
Point(4, 4),
])
polygons = decompose.trapezoidal(v.to_counterclockwise().polygons)
self.assertEqual([p.points for p in polygons], [[
Point(1.5, 1.0), Point(2.5, 1.0),
Point(2.0, 0.0)
], [
Point(1.5, 1.0),
Point(0.0, 4.0),
Point(1.0, 4.0),
Point(2.0, 1.0)
], [
Point(2.0, 1.0),
Point(3.0, 4.0),
Point(4.0, 4.0),
Point(2.5, 1.0)
]])
def test_offset_square(self):
square = Polygon([Point(0, 0), Point(3, 0), Point(3, 3), Point(0, 3)])
parts = square.offset(-0.25)
self.assertEqual(
set(c for poly in parts.polygons for p in poly.points
for c in (p.x, p.y)), set([0.25, 2.75]))
def test_inset_split(self):
dumbbell = Polygon([
Point(0, 0),
Point(0, 3),
Point(1, 3),
Point(1, 4),
Point(0, 4),
Point(0, 7),
Point(3, 7),
Point(3, 4),
Point(2, 4),
Point(2, 3),
Point(3, 3),
Point(3, 0)
])
self.assertEqual(dumbbell.inset(2), [
Polygon([Point(1, 5),
Point(1, 6),
Point(2, 6),
Point(2, 5)]),
Polygon([Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1)])
])
def test_complex_add(self):
polygon = ComplexPolygon([
Polygon([Point(0, 0),
Point(0, 3),
Point(3, 3),
Point(3, 0)]),
Polygon([Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1)])
])
moved = polygon + Vector(20, 10)
self.assertEqual(moved.interior, [
Polygon([Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1)]) + Vector(20, 10)
])
self.assertEqual(moved.exterior, [
Polygon([Point(0, 0),
Point(0, 3),
Point(3, 3),
Point(3, 0)]) + Vector(20, 10)
])
def test_contain_through_lines(self):
shape = Polygon([Point(0, 0), Point(0, 1), Point(1, 1), Point(1, 0)])
self.assertFalse(shape.contains(Point(-1, 0)))
self.assertFalse(shape.contains(Point(0, -1)))
self.assertFalse(shape.contains(Point(2, 0)))
self.assertFalse(shape.contains(Point(0, 2)))
def test_point_on_shape(self):
shape = Polygon([Point(0, 0), Point(0, 1), Point(1, 1), Point(1, 0)])
self.assertTrue(shape.contains(Point(0.5, 0)))
self.assertTrue(shape.contains(Point(0, 0.5)))
self.assertTrue(shape.contains(Point(1, 0.5)))
self.assertTrue(shape.contains(Point(0.5, 1)))
def test_embedded(self):
square = Polygon([
Point(0, 0),
Point(0, 10),
Point(10, 10),
Point(10, 0),
])
inner = Polygon([Point(4, 4), Point(4, 6), Point(6, 6), Point(6, 4)])
polygons = decompose.trapezoidal([square, inner])
self.assertEqual([p.points for p in polygons], [[
Point(0.0, 0.0),
Point(0.0, 4.0),
Point(10.0, 4.0),
Point(10.0, 0.0)
], [
Point(0.0, 4.0),
Point(0.0, 6.0),
Point(4.0, 6.0),
Point(4.0, 4.0)
],
[
Point(6.0, 4.0),
Point(6.0, 6.0),
Point(10.0, 6.0),
Point(10.0, 4.0)
],
[
Point(0.0, 6.0),
Point(0.0, 10.0),
Point(10.0, 10.0),
Point(10.0, 6.0)
]])
def test_offset_merge(self):
notch = Polygon([Point(0, 0), Point(7, 0), Point(4, 4), Point(3, 4)])
parts = notch.offset(-(1.0 + 0.1))
self.assertEqual(len(parts.polygons), 1)
self.assertEqual(len(parts.polygons[0].points), 3)
def test_outset(self):
square = Polygon([Point(0, 0), Point(0, 1), Point(1, 1), Point(1, 0)])
self.assertEqual(list(square.offset(0.1).points), [
Point(-0.1, -0.1),
Point(-0.1, 1.1),
Point(1.1, 1.1),
Point(1.1, -0.1)
])
def test_engrave(self):
polygon = ComplexPolygon([
Polygon([Point(0, 0), Point(0, 100), Point(100, 100), Point(100, 0)]),
Polygon([Point(1, 1), Point(1, 1.25), Point(1.25, 1.25), Point(1.25, 1)])
])
engrave = Engrave(polygon, 0.5)
passes = feed.engrave(config, engrave).passes
self.assertEqual(len(passes[0].path), 5)
def test_unworkable_part_removal(self):
polygon = ComplexPolygon([
Polygon([Point(0, 0), Point(0, 100), Point(100, 100), Point(100, 0)]),
Polygon([Point(1, 1), Point(1, 1.25), Point(1.25, 1.25), Point(1.25, 1)])
])
pocket = Part(polygon, [], 1.0)
passes = feed.part(config, pocket).passes
self.assertEqual(len(passes), 1)
def test_offset_split_notch(self):
notch = Polygon(
[Point(0, 0),
Point(6, 0),
Point(6, 5),
Point(3, 1),
Point(0, 5)])
parts = notch.offset(-(0.375 + 0.1))
self.assertEqual(len(parts.polygons), 2)
def test_offset_foot_double_merge(self):
foot = Polygon([
Point(0, 0),
Point(10, 0),
Point(10, 1),
Point(10, 10),
Point(1, 10),
Point(1, 2),
Point(0, 1)
])
rect = foot.offset(-2)
self.assertEqual(len(rect.polygons[0].points), 4)
def test_inset_local_merge(self):
# the magic of 3-4-5 triangles...
trapezoid = Polygon(
[Point(0, 0),
Point(9, 12),
Point(9 + 5, 12),
Point(9 + 5 + 9, 0)])
self.assertEqual(
[p.round(4) for p in trapezoid.offset(-5).points],
[Point(10 + 3, 5),
Point(10, 5),
Point(10 + (3 / 2), 5 + (4 / 2))])
def test_star_contain(self):
# taken from https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/fill-rule
# we use the evenodd fill-rule so we don't have to calculate crossing
# orientation.
star = Polygon([
Point(50, 0),
Point(21, 90),
Point(98, 35),
Point(2, 35),
Point(79, 90)
])
self.assertFalse(star.contains(Point(50, 50)))
def test_complex_offset_cleanup(self):
polygon = ComplexPolygon([
Polygon(
[Point(0, 0),
Point(0, 100),
Point(100, 100),
Point(100, 0)]),
Polygon([Point(1, -1),
Point(1, -2),
Point(2, -2),
Point(2, -1)])
])
self.assertEqual(len(polygon.offset(-2).exterior), 1)
def test_complex_multiply(self):
polygon = ComplexPolygon([
Polygon([Point(0, 0),
Point(0, 3),
Point(3, 3),
Point(3, 0)]),
Polygon([Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1)])
])
moved = polygon * Vector(20, 10)
self.assertEqual(moved.interior, [
Polygon([Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1)]) * Vector(20, 10)
])
self.assertEqual(moved.exterior, [
Polygon([Point(0, 0),
Point(0, 3),
Point(3, 3),
Point(3, 0)]) * Vector(20, 10)
])
moved = polygon * 2
self.assertEqual(moved.interior, [
Polygon([Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1)]) * 2
])
self.assertEqual(moved.exterior, [
Polygon([Point(0, 0),
Point(0, 3),
Point(3, 3),
Point(3, 0)]) * 2
])
moved = polygon / 2
self.assertEqual(moved.interior, [
Polygon([Point(1, 1),
Point(1, 2),
Point(2, 2),
Point(2, 1)]) / 2
])
self.assertEqual(moved.exterior, [
Polygon([Point(0, 0),
Point(0, 3),
Point(3, 3),
Point(3, 0)]) / 2
])
def test_double_diamond(self):
diamond = Polygon([
Point(1, 0),
Point(2, 1),
Point(1, 2),
Point(0, 1),
])
double = [diamond, diamond + Point(3, 0.1)]
polygons = decompose.trapezoidal(double)
def test_complex(self):
f = Polygon([
Point(0, 0),
Point(0, 7),
Point(4, 7),
Point(4, 5),
Point(2, 5),
Point(2, 4),
Point(4, 4),
Point(4, 2),
Point(2, 2),
Point(2, 0)
])
polygons = decompose.trapezoidal([f])
self.assertEqual(
[p.points for p in polygons],
[[Point(0, 0), Point(0, 2),
Point(2, 2), Point(2, 0)],
[Point(0, 2), Point(0, 4),
Point(4, 4), Point(4, 2)],
[Point(0, 4), Point(0, 5),
Point(2, 5), Point(2, 4)],
[Point(0, 5), Point(0, 7),
Point(4, 7), Point(4, 5)]])
inverted = Polygon([Point(p.y, p.x) for p in f.points])
polygons = decompose.trapezoidal([inverted])
self.assertEqual([p.points for p in polygons], [[
Point(7.0, 0.0),
Point(7.0, 2.0),
Point(0.0, 2.0),
Point(0.0, 0.0)
], [
Point(2.0, 2.0),
Point(2.0, 4.0),
Point(4.0, 4.0),
Point(4.0, 2.0)
], [
Point(5.0, 2.0),
Point(5.0, 4.0),
Point(7.0, 4.0),
Point(7.0, 2.0)
]])
def test_square(self):
square = Polygon([
Point(0, 0),
Point(0, 1),
Point(1, 1),
Point(1, 0),
])
polygons = decompose.trapezoidal([square])
self.assertEqual([p.points for p in polygons], [
[Point(0, 0), Point(0, 1),
Point(1, 1), Point(1, 0)],
])
def test_part(self):
r = 10
n = 6
angles = [tau * i / n for i in range(n)]
circle = Polygon([
Point(math.cos(theta) * r, math.sin(theta) * r)
for theta in angles
])
part = Part(circle, [Tab(Line(Point(0, 0), Vector(0, 1)), 2)], 1.0)
passes = feed.part(config, part).passes
self.assertEqual(len(passes), 2)
def test_contain_through_point(self):
# when we cross through a vertex, it still only should count as one
# boundary crossing for evenodd purposes.
shape = Polygon([Point(-1, 0), Point(0, 1), Point(1, 0), Point(0, -1)])
self.assertTrue(shape.contains(Point(0, 0)))
self.assertTrue(shape.contains(Point(-0.5, 0)))
self.assertTrue(shape.contains(Point(0, -0.5)))
self.assertTrue(shape.contains(Point(0, 0.5)))
self.assertTrue(shape.contains(Point(0.5, 0)))
self.assertFalse(shape.contains(Point(2, 0)))
self.assertFalse(shape.contains(Point(0, 2)))
self.assertFalse(shape.contains(Point(0, -2)))
self.assertFalse(shape.contains(Point(-2, 0)))
def pocket(self):
polygon = ComplexPolygon([
Polygon([Point(0, 0), Point(0, 3), Point(3, 3), Point(3, 0)]),
Polygon([Point(1, 1), Point(1, 2), Point(2, 2), Point(2, 1)])
])
return Pocket(polygon, 1.0)
def rect(a, b):
return Polygon([a, Point(a.x, b.y), b, Point(b.x, a.y)])
