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perf: add CloneAtOffset to skip re-rotation and bbox walk on part clones

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Part.Clone() re-clones from the drawing's unrotated program, re-rotates,
and walks all CNC codes twice for bounding box — 4 O(c) passes per clone.
CloneAtOffset clones from the already-rotated program and computes the
bounding box arithmetically, reducing to 1 O(c) pass per clone.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
AJ Isaacs
2026-03-09 22:53:02 -04:00
parent 5fc16e9dae
commit 23b5358352
3 changed files with 27 additions and 9 deletions
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6
OpenNest.Engine/FillLinear.cs
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@@ -76,8 +76,7 @@ namespace OpenNest
var pushDir = GetPushDirection(direction);
var opposite = Helper.OppositeDirection(pushDir);
var partB = (Part)partA.Clone();
partB.Offset(MakeOffset(direction, bboxDim));
var partB = partA.CloneAtOffset(MakeOffset(direction, bboxDim));
var movingLines = boundary.GetLines(partB.Location, pushDir);
var stationaryLines = boundary.GetLines(partA.Location, opposite);
@@ -364,8 +363,7 @@ namespace OpenNest
if (nextPos + dim > limit + Tolerance.Epsilon)
break;
var clone = (Part)template.Clone();
clone.Offset(MakeOffset(direction, copyDistance * count));
var clone = template.CloneAtOffset(MakeOffset(direction, copyDistance * count));
seed.Parts.Add(clone);
count++;
}

6
OpenNest.Engine/Pattern.cs
View File

@@ -24,11 +24,7 @@ namespace OpenNest
var pattern = new Pattern();
foreach (var part in Parts)
{
var clone = (Part)part.Clone();
clone.Offset(offset);
pattern.Parts.Add(clone);
}
pattern.Parts.Add(part.CloneAtOffset(offset));
pattern.UpdateBounds();
return pattern;