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Codexandclaude[bot]
ac077d9b6d
isDegenerateApexCorner measured the inner-face convergence as max(h1,h2)/tan(theta/2) — for a 10-degree apex between a 15 cm and a 30 cm wall that overstates the distance (171.5 cm against the true 128.3/128.9 on 160 cm edges), the corner failed the "inside both edges" test and rendered as the #329 trident again. Worse, the verdict depended on which neighbouring edge carried the thicker wall. The check now intersects the two actual face lines: the meeting point lands at (hOther + hOwn*cos(theta))/sin(theta) along each edge, degenerate only when inside both. With equal halves this reduces algebraically to the old h/tan(theta/2), so equal-thickness verdicts are unchanged by construction — pinned by the untouched section-4 units and the full golden matrix (136 scenes verified). New units cover both traversal orders of the mixed apex, the one-point outset tip, the 30-degree ordinary pair and the zero-thickness guard. The write path is untouched: P1 forbids new sub-15-degree corners since issue 329, this is purely how a legacy document renders. Issue: #339 User-Visible: yes