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fix: correct Width/Length axis swap in best-fit slide offsets

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BuildOffsets had Width and Length swapped after the Box axis correction
in c5943e2. Horizontal pushes used Length (X) for perpendicular sweep
and Width (Y) for push start — backwards. This caused part2 to start
inside part1's footprint, producing overlapping best-fit pairs.

Added regression test that verifies no kept best-fit pairs overlap.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
AJ Isaacs
2026-04-03 22:26:09 -04:00
parent fce287e649
commit 301831e096
2 changed files with 78 additions and 6 deletions
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14
OpenNest.Engine/BestFit/RotationSlideStrategy.cs
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@@ -89,16 +89,18 @@ namespace OpenNest.Engine.BestFit
if (isHorizontalPush)
{
perpMin = -(bbox2.Length + spacing);
perpMax = bbox1.Length + bbox2.Length + spacing;
pushStartOffset = bbox1.Width + bbox2.Width + spacing * 2;
}
else
{
// Perpendicular sweep along Y → Width; push extent along X → Length
perpMin = -(bbox2.Width + spacing);
perpMax = bbox1.Width + bbox2.Width + spacing;
pushStartOffset = bbox1.Length + bbox2.Length + spacing * 2;
}
else
{
// Perpendicular sweep along X → Length; push extent along Y → Width
perpMin = -(bbox2.Length + spacing);
perpMax = bbox1.Length + bbox2.Length + spacing;
pushStartOffset = bbox1.Width + bbox2.Width + spacing * 2;
}
var alignedStart = System.Math.Ceiling(perpMin / stepSize) * stepSize;