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Tommaso BianchiandClaude Opus 5
cbbd24dcb4
Carries snaporca 572f794c84, d0f9a0052a, 9f7e4e3627 and 3974f8a170. Parity holds: 17 files identical, 8 diverging by their expected counts. EXACT AREA. A loop's area is now integrated entity by entity in traversal order — Green's theorem — instead of being shoelaced over the render polyline, which faceted every arc into 24 chords and lost 2.02 mm2 on a 3706.86 mm2 stadium. 0.054%, invisible on screen, and wrong in a number reported as "the area". OFFSET FOLLOWS THE TRAVERSAL. Offsetting a mirrored profile put one half on the wrong side and split the loop in two, because the chainer only followed p1->p0 links and each entity's offset side was taken from its stored direction. Chains are now orientation-aware, seeded at a free end, offset by `reversed ? -d : d`, and normalised head-to-tail on the way out — so offset is correct for any input ordering and its own output cannot reintroduce the problem. Both are the same underlying lesson, which has now cost three separate defects: an entity's STORED direction is not its direction of TRAVEL around the loop. THE LADDER. scripts/sketch-ladder.py is a graded suite of 2D sketches judged the way a person judges them — VERTEX, LENGTH, ARC, TANGENT, SYMMETRY, CLOSED — with area only as a cross-check, because area is derived and nobody can confirm it by eye. Eight rungs from a rectangle up to MPD5 from the StudyCadCam corpus, a dia 27 x 95 pin reproduced as its revolve half-profile with the R5 fillet tangency solved exactly. Entirely 2D: no extrude or any solid feature. Kernel here: all tests passed, 2681 assertions in 231 test cases, including the new "profile: a mirrored half offsets as one loop, not two". GUI target builds and links. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
OrcaSlicer tests
Building, running and writing tests is documented on the wiki, under How to Test.
Two files here rather than there, because coding agents only read what is in the repository: