Make quantity trimming direction-aware: DefaultNestEngine uses TrimAxis
(virtual property on NestEngineBase) so HorizontalRemnantEngine removes
topmost parts instead of rightmost. Rename ShrinkAxis.Height → Length
for consistency with Width/Length naming used throughout the codebase.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Height shrink now uses HorizontalRemnantEngine (minimizes Y-extent)
and width shrink uses VerticalRemnantEngine (minimizes X-extent).
IterativeShrinkFiller accepts an optional widthFillFunc so each
shrink axis can use a different fill engine.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Replace stored property setters (BestPartCount, BestDensity, NestedWidth,
NestedLength, NestedArea) with computed properties that derive values from
BestParts, with a lazy cache invalidated on setter. Add internal
ProgressReport struct to replace the 7-parameter ReportProgress signature.
Update all 13 callsites and AccumulatingProgress. Delete FormatPhaseName
in favor of NestPhase.ShortName() extension.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
PairFiller now returns PairFillResult (Parts + BestFits) instead of
using a mutable BestFits property. Extracted EvaluateCandidates,
TryReduceWorkArea, and BuildTilingAngles for clarity. Simplified the
candidate loop by leveraging FillScore comparison semantics.
Removed FillRemainingStrip and all its helpers (FindPlacedEdge,
BuildRemainingStrip, BuildRotationSet, FindBestFill, TryFewerRows,
RemainderPatterns) from FillLinear — these were a major bottleneck in
strip nesting, running expensive fills on undersized remnant strips.
ShrinkFiller + RemnantFiller already handle space optimization, making
the remainder strip fill redundant.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
StripNestEngine was passing progress directly to DefaultNestEngine.Fill
inside the ShrinkFiller loop, causing every per-angle/per-strategy report
to update the UI with overlapping layouts in the same work area.
Now inner fills are silent (null progress) and ShrinkFiller reports its
own progress when the best layout improves. IterativeShrinkFiller tracks
placed parts across items and includes them in reports. The trial box is
reported before the fill starts so the work area border updates immediately.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
When a target count is known, ShrinkFiller now uses FillBestFit (fast
rectangle packing) to estimate how many parts fit on the full area,
then scales the shrink axis proportionally to avoid an expensive
full-area fill. Falls back to full box if estimate is too aggressive.
Also shrinks to targetCount (not full count) to produce tighter boxes
when fewer parts are needed than the area can hold.
IterativeShrinkFiller passes NestItem.Quantity as the target count.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Introduces IterativeShrinkFiller.Fill, which composes RemnantFiller and
ShrinkFiller by wrapping the caller's fill function in a closure that tries
both ShrinkAxis.Height and ShrinkAxis.Width and picks the better FillScore.
Adds IterativeShrinkResult (Parts + Leftovers). Covers null/empty inputs and
single-item placement with three passing xUnit tests.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
