Keep cut outlines dark and etch strokes bright green. Assign drawing fills by a golden-angle hue walk with varied saturation/lightness tiers, preserving legacy schemes and rendering-only behavior. Include palette, visibility, persistence, and contrast regressions.
Build paths in the drawing-local frame and translate both ordinary and split cut/lead paths once, without changing CNC programs. Add native Windows regressions using the operator's synthetic G90 fixture and incremental controls. Four absolute-mode cases fail before the fix; all seven pass after.
No-hole parts now choose the outside entry through the S03-S08 pipeline
at the part boundary: rank the native catalogue toward the NEXT cut's
placed-material centre, lazily certify each emitted lead with the shared
validator, cap at maxEntries with side coverage. The next cut is the
next unfinished part on the supplied order (re-read after every
learned-order replan) or, in sequence-free fallback, the nearest
dependency-ready remaining part with stable ordinal ties; the last part
has no target and ranks by tier then arrival distance — never the plate
origin. Target and arrival are converted to prepared LOCAL coordinates
exactly once; geometry is already rotated.
The look-ahead rank survives Follow's ordering: children sort by
nearest source first (the sequence-free tour stays nearest-first), then
contour, then the selection rank — plain OrderBy(Distance) can no longer
undo the facing. Measured fixture (three squares, 0.15 leads, origin
start): legacy cut every sheet at its arrival-nearest lower-left corner
with 10.5-unit cross-sheet rapids totalling 21.0; look-ahead cuts the
+X-facing corner with the same 21.0 total but each inter-part rapid now
starts at the facing edge instead of trailing across the whole sheet.
Uncertain validator answers are never precheck-refused: they skip the
selected slots but flow to the emitted-prefix Check and complete replay,
which stay the authority — a refused-looking incomplete is reported,
not hidden. A fully evaluated catalogue with no fitting lead surfaces
'No tested lead-in fits on part N, contour M'; budget exhaustion stays a
budget finding. Lead prechecks count separately from DFS expansions; the
pipeline itself is one counted expansion per contour. Full backtracking,
dependencies, locked/fixed programs, cutoff handling, emitted-prefix
Check and complete replay are unchanged; budgets and CuttingPartOrder
untouched. Hole parts keep the legacy path until S12.
Fix DuplicateRows_CreateNestsButtonImportsOneDrawingWithCombinedQuantity timeout from Windows run 37526243901. Native trace on DesktopPC showed the sole OK button uses control ID 2, not IDOK 1. Preserve real dialog text and nest assertions; find the sole button and stop polling only after successful posting. All 392 WinForms and 49 FrontEnd tests pass in an interactive Windows session.
The engine argument's description now names every built-in engine with what
it suits, so a model can choose one; omitting it still means Default. The fill
tools resolve an omitted strategy to Fill directly instead of through the
session's whole-job default. Front-end tests cover the MCP and console
defaults and keep the description in step with the registry's built-ins.
Default is the engine every front end uses when none is named. It now runs
Irregular, then Rectangles, checks both layouts with NestLayoutCheck and keeps
the best: valid first, then fewest unplaced parts, then lowest salvage-credited
cost; ties keep Irregular. A candidate that throws or returns nothing is
skipped, cancellation stops the search, and only the chosen layout's plate
commits are reported. Neither engine wins every job in the lane benchmarks,
and Rectangles adds little time while also covering Irregular's invalid
layouts.
The registry lists Default first and no longer maps the name to Fill; fill
strategy callers still read Default as Fill. A future circle/ring engine joins
as another candidate.
The multi-phase lattice fill (linear, pairs, rectangle best-fit, remainder) is
no longer meant to be the engine used by default, so it gets a name for what
it does. The registry lists it as Fill and maps the old name Default to it;
PlateFillService, PlateNesterFactory and NestJobOptions use Fill, and every
fill-strategy caller still accepts Default. Console --autonest now validates
engine names through NestingEngineRegistry.ResolveName so renamed names work.
Layouts are unchanged: Default and Fill resolve to the same fillers and the
golden layouts pass under the new name.
Plan Cutting refused ordinary filleted parts with "Native contact query is
numerically uncertain." Material capture checks every curve pair of a ring,
adjacent ones included. Where a line meets a tangent arc at their shared
vertex, rounding can drop the tangent root of the native line/circle
quadratic; the exact ray cast from the line's far end then reached the
vertex, which is already recorded as an endpoint contact, and was read as a
contact the native query missed. Rounded rectangles rotated off-axis were
refused 1037 times in 1080 before this change and 0 times after.
The exactness rays now stop short of a line endpoint the other curve already
contains (half-way from each end when both are contained), so together they
still cover every other point of the line and any unrecorded contact still
refuses. The native kernel and tolerances are unchanged.
Regressions: four tangent-fillet rings and a rotated filleted part planned
through CuttingPlanBatch (red before, green after); a line ending inside a
small circle's contact band stays uncertain in both directions. Mutations that
treat either endpoint as always contained, drop the start ray, or count
recorded endpoints as native contacts all fail.
Project Memory: 41880037
aj