def test_degenerate_xy_of_cases():
vert = Line.ByPoints(P2(1, 1), P2(1, -1))
assert vert.f_of_x(1) is None
assert vert.f_of_x(-100) is None
assert vert.f_of_y(-1) == pytest.approx(1)
assert vert.f_of_y(1) == pytest.approx(1)
assert vert.f_of_y(-100) == pytest.approx(1)
assert vert.f_of_y(100) == pytest.approx(1)
horz = Line.ByPoints(P2(-1, 0), P2(1, 0))
assert horz.f_of_x(-1) == pytest.approx(0)
assert horz.f_of_x(1) == pytest.approx(0)
assert horz.f_of_x(-100) == pytest.approx(0)
assert horz.f_of_x(100) == pytest.approx(0)
assert horz.f_of_y(-1) is None
assert horz.f_of_y(1) is None
assert horz.f_of_y(-100) is None
assert horz.f_of_y(100) is None
def test_does_intersect_line_line_segment():
line = Line(1, 0, 0)
x_ls = LineSegment(P2(-1, 0), P2(1, 0))
p_ls = LineSegment(P2(-1, -1), P2(-1, 1))
assert does_intersect(line, x_ls)
assert does_intersect(x_ls, line)
assert not does_intersect(line, p_ls)
assert not does_intersect(p_ls, line)
with pytest.raises(ValueError):
does_intersect(line, LineSegment(P2(0, 0), P2(0, 1)))
def test_translate():
line = Line(2, 1, 2)
assert line.f_of_x(0) == pytest.approx(2)
assert line.f_of_y(0) == pytest.approx(1)
translated = line.translate(V2(1, 1))
assert translated.f_of_x(0) == pytest.approx(3)
assert translated.f_of_y(0) == pytest.approx(2)
horz = Line.ByPoints(P2(-1, 10), P2(1, 10))
assert horz.f_of_x(0) == pytest.approx(10)
translated = horz.translate(V2(1, 1))
assert translated.f_of_x(0) == pytest.approx(11)
vert = Line.ByPoints(P2(10, -1), P2(10, 1))
assert vert.f_of_y(0) == pytest.approx(10)
translated = vert.translate(V2(1, 1))
assert translated.f_of_y(0) == pytest.approx(11)
def test_does_intersect_line_circle():
circle = Circle(99, P2(100, 100))
assert not does_intersect(circle, Line(1, 1, 0))
assert not does_intersect(Line(1, 1, 0), circle)
assert does_intersect(circle, Line(1, -1, 0))
assert does_intersect(Line(1, -1, 0), circle)
assert does_intersect(circle, Line(1, 0, 100))
assert does_intersect(Line(1, 0, 100), circle)
assert does_intersect(circle, Line(0, 1, 100))
assert does_intersect(Line(0, 1, 100), circle)
assert not does_intersect(circle, Line(1, 0, 0))
assert not does_intersect(Line(1, 0, 0), circle)
assert does_intersect(circle, Line(1, 0, 1))
assert does_intersect(Line(1, 0, 1), circle)
def test_line_line_segment_degenerate():
l1 = Line(1, 1, 0)
with pytest.raises(ValueError):
intersect(l1, LineSegment(P2(0, 0), P2(-10, 10)))
def test_xy_of():
l = Line(-1, 1, 0)
assert l.f_of_x(1) == pytest.approx(1)
assert l.f_of_x(-1) == pytest.approx(-1)
assert l.f_of_y(1) == pytest.approx(1)
assert l.f_of_y(-1) == pytest.approx(-1)
assert l.f_of_x(25) == pytest.approx(25)
assert l.f_of_x(-25) == pytest.approx(-25)
assert l.f_of_y(25) == pytest.approx(25)
assert l.f_of_y(-25) == pytest.approx(-25)
l = Line(1, 1, 0)
assert l.f_of_x(1) == pytest.approx(-1)
assert l.f_of_x(-1) == pytest.approx(1)
assert l.f_of_y(1) == pytest.approx(-1)
assert l.f_of_y(-1) == pytest.approx(1)
assert l.f_of_x(25) == pytest.approx(-25)
assert l.f_of_x(-25) == pytest.approx(25)
assert l.f_of_y(25) == pytest.approx(-25)
assert l.f_of_y(-25) == pytest.approx(25)
def test_line_points():
line = Line(1, -1, 0)
assert P2(25, 25) == line.point(x=25)
assert P2(25, 25) == line.point(y=25)