kernel2d-Port Phase 4: Trim/Split/Join (Loewenanteil)
Portiert (1:1, reihenfolge-/strukturtreu):
- splitSegmentByCutters, trimSegment, trimPolyline (+ span/nearestParamOnChain),
extendSegment.
- splitPolylineAtParam, splitClosedByChord (+ dedupeRing), removeSegment.
- splitAtIntersections (+ polylineEdgesAuto, splitOpenByEdgeHits/AtHits, EdgeHit).
- joinChains: greedy i<j-erster-Treffer-dann-Neustart, exakt wie TS
(splice-Semantik via remove(j)+open[i]=combined).
- Polyline-Struct {pts,closed}; stabile (edge,t)-Sortierung, 1e-6-Dedup.
- 9 Batch-Fassaden + 4 native Unit-Tests.
Harness: 5 neue Paritaets-Bloecke (Struktur EXAKT + Werte), Cutter-/Polylinien-
Generatoren, joinChains mit re-mergebaren Ketten. cargo test 18/18, vitest 247
(5 neu, davon 17 Parity) gruen, tsc sauber, build:kernel2d sauber.
karim
4a26c34db1