forked from 1b-agent/fieldcraft-upstream
jyvikoandClaude Opus 5.5
02172f9a7e
A region of an extrusion's (or revolution's) cross-section that no structured scheme fits is now cut by straight lines into blocks that fit, before interval assignment, so the cuts are curves of the arrangement and their counts are assigned with the rest; nothing reaches the model (hex::decompose, after Tam and Armstrong's medial-axis subdivision and Li, Armstrong and McKeag's primitives). Per region: several holes are separated by lines across the gaps between neighbouring holes; a piece with one hole gets the O-grid layout whose pieces score best (lines from the outer corners towards the hole or along their bisectors, from the hole's corners, or along four directions from the hole); pieces without holes are cut by a two-ply search over lines from concave corners and fillets and from convex corners. Candidates are scored by meshing the pieces with their schemes (smallest corner scaled Jacobian). A region's blocks are kept when fair (at least 0.5) or no worse than its free mesh, and cuts never end inside a seeded curve. This replaces the cuts from reflex corners along an edge. Tests on an L, a T, a plate with a hole, with a slot and with three holes, and the half crank's cross-section: every region structured, the quads conforming and the smallest corner scaled Jacobian bounded. The half crank arm now extrudes in 12 structured regions with a hex20 minimum scaled Jacobian of 0.37 (the arm meeting the bosses 20 degrees off tangent bounds it) where it had 2 free regions and 0.009. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01UhhZMBTviDQxZvwnyP89fo