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fix(engine): move progress reporting from inner fills to ShrinkFiller

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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>
This commit is contained in:
AJ Isaacs
2026-03-19 12:43:35 -04:00
parent ca35945c13
commit 8bfc13d529
3 changed files with 66 additions and 7 deletions
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31
OpenNest.Engine/Fill/IterativeShrinkFiller.cs
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@@ -28,7 +28,9 @@ namespace OpenNest.Engine.Fill
Box workArea,
Func<NestItem, Box, List<Part>> fillFunc,
double spacing,
CancellationToken token = default)
CancellationToken token = default,
IProgress<NestProgress> progress = null,
int plateNumber = 0)
{
if (items == null || items.Count == 0)
return new IterativeShrinkResult();
@@ -65,16 +67,37 @@ namespace OpenNest.Engine.Fill
var filler = new RemnantFiller(workArea, spacing);
// Track parts placed by previous items so ShrinkFiller can
// include them in progress reports.
var placedSoFar = new List<Part>();
Func<NestItem, Box, List<Part>> shrinkWrapper = (ni, box) =>
{
var target = ni.Quantity > 0 ? ni.Quantity : 0;
var heightResult = ShrinkFiller.Shrink(fillFunc, ni, box, spacing, ShrinkAxis.Height, token, targetCount: target);
var widthResult = ShrinkFiller.Shrink(fillFunc, ni, box, spacing, ShrinkAxis.Width, token, targetCount: target);
var heightResult = ShrinkFiller.Shrink(fillFunc, ni, box, spacing, ShrinkAxis.Height, token,
targetCount: target, progress: progress, plateNumber: plateNumber, placedParts: placedSoFar);
var widthResult = ShrinkFiller.Shrink(fillFunc, ni, box, spacing, ShrinkAxis.Width, token,
targetCount: target, progress: progress, plateNumber: plateNumber, placedParts: placedSoFar);
var heightScore = FillScore.Compute(heightResult.Parts, box);
var widthScore = FillScore.Compute(widthResult.Parts, box);
return widthScore > heightScore ? widthResult.Parts : heightResult.Parts;
var best = widthScore > heightScore ? widthResult.Parts : heightResult.Parts;
// Report the winner as overall best so the UI shows it as settled.
if (progress != null && best != null && best.Count > 0)
{
var allParts = new List<Part>(placedSoFar.Count + best.Count);
allParts.AddRange(placedSoFar);
allParts.AddRange(best);
NestEngineBase.ReportProgress(progress, NestPhase.Custom, plateNumber,
allParts, box, $"Shrink: {best.Count} parts placed", isOverallBest: true);
}
// Accumulate for the next item's progress reports.
placedSoFar.AddRange(best);
return best;
};
var placed = filler.FillItems(workItems, shrinkWrapper, token);