def test_associativity(segments_triplet: SegmentsTriplet) -> None:
first, second, third = segments_triplet
first_second_union = unite_segments(first, second)
second_third_union = unite_segments(second, third)
assert (not is_segment(first_second_union)
or not is_segment(second_third_union) or are_compounds_similar(
unite_segments(first_second_union, third),
unite_segments(first, second_third_union)))
def test_difference_operand(segments_triplet: SegmentsTriplet) -> None:
first, second, third = segments_triplet
first_second_difference = subtract_segments(first, second)
first_third_union = unite_segments(first, third)
second_third_difference = subtract_segments(second, third)
assert (not is_segment(first_second_difference)
or not is_segment(first_third_union)
or not is_segment(second_third_difference)
or are_compounds_similar(
unite_segments(first_second_difference, third),
subtract_segments(first_third_union, second_third_difference)))
def test_reversals(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
result = unite_segments(first, second)
assert are_compounds_similar(
result, unite_segments(first, reverse_segment(second)))
assert are_compounds_similar(
result,
reverse_compound_coordinates(
unite_segments(reverse_segment_coordinates(first),
reverse_segment_coordinates(second))))
def test_distribution_over_intersection(
segments_triplet: SegmentsTriplet) -> None:
first, second, third = segments_triplet
first_second_union = unite_segments(first, second)
first_third_union = unite_segments(first, third)
second_third_intersection = intersect_segments(second, third)
assert (not is_segment(first_second_union)
or not is_segment(first_third_union)
or not is_segment(second_third_intersection)
or are_compounds_similar(
unite_segments(first, second_third_intersection),
intersect_segments(first_second_union, first_third_union)))
def test_equivalents(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
result = symmetric_subtract_segments(first, second)
first_second_difference = subtract_segments(first, second)
first_second_union = unite_segments(first, second)
second_first_difference = subtract_segments(second, first)
second_first_intersection = intersect_segments(second, first)
assert (not is_segment(second_first_intersection)
or not is_segment(first_second_union) or are_compounds_similar(
result,
subtract_segments(first_second_union,
second_first_intersection)))
assert (not is_segment(first_second_difference)
or not is_segment(second_first_difference)
or are_compounds_similar(
result,
unite_segments(first_second_difference,
second_first_difference)))
def test_intersection_subtrahend(segments_triplet: SegmentsTriplet) -> None:
first, second, third = segments_triplet
first_second_difference = subtract_segments(first, second)
first_third_difference = subtract_segments(first, third)
second_third_intersection = intersect_segments(second, third)
assert (not is_segment(first_second_difference)
or not is_segment(first_third_difference)
or not is_segment(second_third_intersection)
or are_compounds_similar(
subtract_segments(first, second_third_intersection),
unite_segments(first_second_difference,
first_third_difference)))
def __or__(self, other: Compound) -> Compound:
"""
Returns union of the segment with the other geometry.
Time complexity:
``O(1)``
Memory complexity:
``O(1)``
>>> from gon.base import Point, Segment
>>> segment = Segment(Point(0, 0), Point(2, 0))
>>> segment | segment == segment
True
"""
context = self._context
return (pack_mix(other - self, self, context.empty, context.empty,
context.mix_cls) if isinstance(other, Multipoint) else
(unite_segments(self, other, context=context) if isinstance(
other, Segment) else NotImplemented))
def test_absorption_identity(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
first_second_union = unite_segments(first, second)
assert (not is_segment(first_second_union)
or intersect_segments(first, first_second_union) == first)
def test_commutativity(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
result = unite_segments(first, second)
assert are_compounds_similar(result, unite_segments(second, first))
def test_idempotence(segment: Segment) -> None:
result = unite_segments(segment, segment)
assert result == segment
def test_basic(segments_pair: SegmentsPair) -> None:
first, second = segments_pair
result = unite_segments(first, second)
assert is_homogeneous_non_shaped(result)