def test_intersection_point(self):
line1 = geometry2d.Line()
line1.y_intercept = 0
line1.slope = 0.5
line2 = geometry2d.Line()
line2.y_intercept = 3
line2.slope = 0.2
self.assertEqual(geometry2d.intersection_point(line1, line2), geometry2d.Point(10, 5))
def test_str(self):
self.assertEqual(str(geometry2d.Point(1, 2)), "(1.00, 2.00)")
def test_intersects(self):
tests = [
(geometry2d.LineSegment(
geometry2d.Point(1, 1), geometry2d.Point(1, 2)),
geometry2d.LineSegment(
geometry2d.Point(2, 1), geometry2d.Point(2, 2)),
False),
(geometry2d.LineSegment(
geometry2d.Point(1, 1), geometry2d.Point(2, 2)),
geometry2d.LineSegment(
geometry2d.Point(2, 1), geometry2d.Point(1, 2)),
True),
(geometry2d.LineSegment(
geometry2d.Point(1, 1), geometry2d.Point(1, 1)),
geometry2d.LineSegment(
geometry2d.Point(2, 2), geometry2d.Point(2, 2)),
False),
(geometry2d.LineSegment(
geometry2d.Point(0, 0), geometry2d.Point(-1, 0)),
geometry2d.LineSegment(
geometry2d.Point(0, 1), geometry2d.Point(-1, 1)),
False),
(geometry2d.LineSegment(
geometry2d.Point(0, 0), geometry2d.Point(-1, 5)),
geometry2d.LineSegment(
geometry2d.Point(0, 1), geometry2d.Point(-1, 1)),
True),
(geometry2d.LineSegment(
geometry2d.Point(0, 0), geometry2d.Point(-1, 0.5)),
geometry2d.LineSegment(
geometry2d.Point(0, 1), geometry2d.Point(-1, 1)),
False),
# shares point tests
(geometry2d.LineSegment(
geometry2d.Point(1, 1), geometry2d.Point(2, 1)),
geometry2d.LineSegment(
geometry2d.Point(2, 1), geometry2d.Point(2, 2)),
False),
(geometry2d.LineSegment(
geometry2d.Point(6, 5), geometry2d.Point(7, 0)),
geometry2d.LineSegment(
geometry2d.Point(7, 0), geometry2d.Point(2, 0)),
False)
# parallel lines tests
# (geometry2d.LineSegment(
# geometry2d.Point(1, 1), geometry2d.Point(1, 2)),
# geometry2d.LineSegment(
# geometry2d.Point(1, 2), geometry2d.Point(1, 1.5)),
# True),
# (geometry2d.LineSegment(
# geometry2d.Point(1, 1), geometry2d.Point(1, 2)),
# geometry2d.LineSegment(
# geometry2d.Point(1, 2), geometry2d.Point(1, 3)),
# False)
]
for test in tests:
with self.subTest(test=test):
line1, line2, expected = test
self.assertEqual(line1.intersects(line2), expected)
self.assertEqual(line2.intersects(line1), expected)
def test_is_clockwise(self):
tests = [
(geometry2d.Point(0, 0), geometry2d.Point(0, 0), geometry2d.Point(0, 0), False),
(geometry2d.Point(0, 0), geometry2d.Point(0, 0), geometry2d.Point(1, 1), False),
(geometry2d.Point(0, 0), geometry2d.Point(0, 0), geometry2d.Point(1, -1), False),
(geometry2d.Point(0, 0), geometry2d.Point(1, 1), geometry2d.Point(0, 0), False),
(geometry2d.Point(0, 0), geometry2d.Point(1, -1), geometry2d.Point(0, 0), False),
(geometry2d.Point(0, 0), geometry2d.Point(1, 0), geometry2d.Point(1, -1), True),
(geometry2d.Point(0, 0), geometry2d.Point(1, 0), geometry2d.Point(1, 1), False),
(geometry2d.Point(1, 1), geometry2d.Point(1, 0), geometry2d.Point(0, 0), True),
(geometry2d.Point(5, 5), geometry2d.Point(6, 4), geometry2d.Point(5, 3), True),
(geometry2d.Point(5, 5), geometry2d.Point(6, 4), geometry2d.Point(7, 3), False),
]
for test in tests:
with self.subTest(test=test):
point1, point2, point3, expected = test
if (not math.isnan(geometry2d.slope(point1, point2)) and
not math.isnan(geometry2d.slope(point1, point3))):
self.assertEqual(
geometry2d.is_clockwise(point1, point2, point3),
geometry2d.slow_is_clockwise(point1, point2, point3))
self.assertEqual(geometry2d.is_clockwise(point1, point2, point3), expected)
def test_slope(self):
tests = [
(geometry2d.Point(0, 0), geometry2d.Point(1, 0), 0),
(geometry2d.Point(0, 0), geometry2d.Point(1, 1), 1),
(geometry2d.Point(0, 0), geometry2d.Point(0, 1), math.nan),
(geometry2d.Point(1, 1), geometry2d.Point(1, 0), math.nan),
(geometry2d.Point(0, 0), geometry2d.Point(1, 3), 3),
(geometry2d.Point(0, 0), geometry2d.Point(-1, 3), -3),
(geometry2d.Point(0, 0), geometry2d.Point(-1, -3), 3),
(geometry2d.Point(1, 1), geometry2d.Point(2, 2), 1),
(geometry2d.Point(-1, -1), geometry2d.Point(-2, -2), 1),
(geometry2d.Point(1, 1), geometry2d.Point(2, -2), -3),
]
for test in tests:
with self.subTest(test=test):
point1, point2, expected = test
self.assertTrue(math.isnan(geometry2d.slope(point1, point1)))
if math.isnan(expected):
self.assertTrue(math.isnan(geometry2d.slope(point1, point2)))
self.assertTrue(math.isnan(geometry2d.slope(point2, point1)))
else:
self.assertEqual(geometry2d.slope(point1, point2), expected)
self.assertEqual(geometry2d.slope(point2, point1), expected)