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refactor: use ShapeProfile perimeter for boundary and intersection

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Replace shape-list iteration with ShapeProfile.Perimeter in both
Part.Intersects and PartBoundary, simplifying the logic and ensuring
only the outermost contour is used for collision detection.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
AJ Isaacs
2026-03-14 12:41:03 -04:00
parent 65ded42120
commit a9aaab8337
2 changed files with 29 additions and 31 deletions
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28
OpenNest.Engine/PartBoundary.cs
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@@ -23,22 +23,26 @@ namespace OpenNest
public PartBoundary(Part part, double spacing)
{
var entities = ConvertProgram.ToGeometry(part.Program);
var shapes = Helper.GetShapes(entities.Where(e => e.Layer != SpecialLayers.Rapid));
var entities = ConvertProgram.ToGeometry(part.Program)
.Where(e => e.Layer != SpecialLayers.Rapid)
.ToList();
var definedShape = new ShapeProfile(entities);
var perimeter = definedShape.Perimeter;
_polygons = new List<Polygon>();
foreach (var shape in shapes)
if (perimeter != null)
{
var offsetEntity = shape.OffsetEntity(spacing, OffsetSide.Left) as Shape;
var offsetEntity = perimeter.OffsetEntity(spacing, OffsetSide.Left) as Shape;
if (offsetEntity == null)
continue;
// Circumscribe arcs so polygon vertices are always outside
// the true arc — guarantees the boundary never under-estimates.
var polygon = offsetEntity.ToPolygonWithTolerance(PolygonTolerance, circumscribe: true);
polygon.RemoveSelfIntersections();
_polygons.Add(polygon);
if (offsetEntity != null)
{
// Circumscribe arcs so polygon vertices are always outside
// the true arc — guarantees the boundary never under-estimates.
var polygon = offsetEntity.ToPolygonWithTolerance(PolygonTolerance, circumscribe: true);
polygon.RemoveSelfIntersections();
_polygons.Add(polygon);
}
}
PrecomputeDirectionalEdges(