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fix: use CPU evaluator for best-fit cache, remove broken GPU dilation

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The GPU bitmap evaluator produces false overlap detections due to
discretization errors at cell boundaries. Use the CPU PairEvaluator
(exact geometric intersection) for now. Also remove the double-counted
spacing dilation from GpuPairEvaluator for when GPU is revisited.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
AJ Isaacs
2026-03-08 14:20:13 -04:00
parent 3220306d3a
commit c28d5d8c12
2 changed files with 4 additions and 6 deletions
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7
OpenNest.Gpu/GpuPairEvaluator.cs
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@@ -33,8 +33,9 @@ namespace OpenNest.Gpu
if (candidates.Count == 0)
return new List<BestFitResult>();
var dilation = _spacing / 2.0;
var bitmapA = PartBitmap.FromDrawing(_drawing, _cellSize, dilation);
// No dilation — candidate positions already include spacing
// (baked in by RotationSlideStrategy via half-spacing offset lines).
var bitmapA = PartBitmap.FromDrawing(_drawing, _cellSize);
if (bitmapA.Width == 0 || bitmapA.Height == 0)
return candidates.Select(c => MakeEmptyResult(c)).ToList();
@@ -53,7 +54,7 @@ namespace OpenNest.Gpu
var groupItems = group.ToList();
// Rasterize B at this rotation
var bitmapB = PartBitmap.FromDrawingRotated(_drawing, rotation, _cellSize, dilation);
var bitmapB = PartBitmap.FromDrawingRotated(_drawing, rotation, _cellSize);
if (bitmapB.Width == 0 || bitmapB.Height == 0)
{