def test_node_invert():
segments = [
Segment([Vector(0, 0), Vector(0, 10)]),
Segment([Vector(0, 10), Vector(10, 10)]),
Segment([Vector(10, 10), Vector(0, 0)])
]
n = Node(segments)
n.invert()
assert n is not None
assert len(n.segments) == 1
assert n.line == Segment([Vector(0, 0), Vector(0, -10)]).line
assert n.right
assert not n.left
def test_manual_union():
poly_a = CSG.from_polygons([[
[0, 0],
[15, 0],
[15, 15],
[0, 15]
]])
poly_b = CSG.from_polygons([[
[30, 30],
[10, 30],
[10, 10],
[30, 10]
]])
a = Node(poly_a.clone().segments)
assert len(a.all_segments()) == 4
b = Node(poly_b.clone().segments)
assert len(a.all_segments()) == 4
a.invert()
assert len(a.all_segments()) == 4
b.clip_to(a)
assert len(b.all_segments()) == 5
b.invert()
assert len(b.all_segments()) == 5
a.clip_to(b)
a_all_segments = a.all_segments()
assert len(a.all_segments()) == 5
b.clip_to(a)
b_all_segments = b.all_segments()
assert len(b.all_segments()) == 5
segs = b.all_segments()
assert len(segs) == 5
a.build(segs)
a_all_segments = a.all_segments()
assert len(a.all_segments()) == 10
a.invert()
a_all_segments = a.all_segments()
assert len(a.all_segments()) == 10