def test_commutativity(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
result = symmetric_subtract_segments(first, second)
assert are_compounds_similar(result,
symmetric_subtract_segments(second, first))
def test_reversals(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
result = symmetric_subtract_segments(first, second)
assert are_compounds_similar(
result, symmetric_subtract_segments(first, reverse_segment(second)))
assert are_compounds_similar(
result,
reverse_compound_coordinates(
symmetric_subtract_segments(reverse_segment_coordinates(first),
reverse_segment_coordinates(second))))
def test_repeated(segments_triplet: SegmentsTriplet) -> None:
first, second, third = segments_triplet
first_second_symmetric_difference = symmetric_subtract_segments(
first, second)
second_third_symmetric_difference = symmetric_subtract_segments(
second, third)
assert (not is_segment(first_second_symmetric_difference)
or not is_segment(second_third_symmetric_difference)
or are_compounds_similar(
symmetric_subtract_segments(first_second_symmetric_difference,
second_third_symmetric_difference),
symmetric_subtract_segments(first, third)))
def test_equivalents(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
result = unite_segments(first, second)
first_second_symmetric_difference = symmetric_subtract_segments(
first, second)
first_second_intersection = intersect_segments(first, second)
assert (not is_segment(first_second_symmetric_difference)
or not is_segment(first_second_intersection)
or are_compounds_similar(
result,
symmetric_subtract_segments(first_second_symmetric_difference,
first_second_intersection)))
def __xor__(self, other: Compound[Coordinate]) -> Compound[Coordinate]:
"""
Returns symmetric difference of the segment with the other geometry.
Time complexity:
``O(1)``
Memory complexity:
``O(1)``
>>> from gon.base import EMPTY, Point, Segment
>>> segment = Segment(Point(0, 0), Point(2, 0))
>>> segment ^ segment is EMPTY
True
"""
context = self._context
return (pack_mix(other - self, self, context.empty, context.empty,
context.mix_cls) if isinstance(other, Multipoint) else
(symmetric_subtract_segments(self, other, context=context)
if isinstance(other, Segment) else NotImplemented))
def test_self_inverse(segment: Segment) -> None:
result = symmetric_subtract_segments(segment, segment)
assert is_empty(result)
def test_basic(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
result = symmetric_subtract_segments(first, second)
assert is_maybe_linear(result)