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fix(expand): distinguish open-path material entry from bounds

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aj committed 2026-10-13 22:34:21 -04:00
1 parent 27f8c9799b
commit 6424512e8c
6 files changed
+365 -8
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OpenNest.Engine/Fill/Expander.cs
+12 -7
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@@ -784,6 +784,10 @@ namespace OpenNest.Engine.Fill
if (setA.Outer == null || setB.Boundaries.Any(e => e is not Line))
return (-1e-4, new Vector(1, 0));
var lines = CloneEntitiesAt(setB.Boundaries, offsetB).Cast<Line>().ToList();
var worldOuter = CloneAt(setA.Outer, offsetA);
var worldHoles = setA.Holes.Count == 0 ? null : CloneAll(setA.Holes, offsetA);
if (OpenPathMaterial.Enters(worldOuter, worldHoles, lines))
return (-1e-4, new Vector(1, 0));
var cutoffBest = double.MaxValue;
var cutoffDirection = new Vector(1, 0);
foreach (var ring in setA.Rings)
@@ -795,6 +799,8 @@ namespace OpenNest.Engine.Fill
cutoffDirection = clearance.Direction;
}
}
if (setA.HasCurves && cutoffBest >= 0 && cutoffBest < 0.002)
return (-1e-4, cutoffDirection);
return (cutoffBest, cutoffDirection);
}
@@ -946,7 +952,6 @@ namespace OpenNest.Engine.Fill
continue;
if (stationary.Boundaries.Any(e => e is not Line))
return 0;
var movingBox = moving.NativeBounds.Translate(positions[index]);
foreach (var entity in stationary.Boundaries)
{
var line = (Line)entity;
@@ -954,13 +959,13 @@ namespace OpenNest.Engine.Fill
|| !double.IsFinite(line.EndPoint.X) || !double.IsFinite(line.EndPoint.Y)
|| line.StartPoint.X == line.EndPoint.X && line.StartPoint.Y == line.EndPoint.Y)
return 0;
// An already-intersecting open path has no certified
// exit; refuse uncertain motion, not the input itself.
var segmentBox = line.BoundingBox.Translate(positions[i]);
if (movingBox.Right > segmentBox.Left && movingBox.Left < segmentBox.Right
&& movingBox.Top >= segmentBox.Bottom && movingBox.Bottom <= segmentBox.Top)
return 0;
}
// A segment box can overlap a concave/oblique part box
// while its actual open path remains far away. Use the
// same strict material-entry verdict as entry floors
// and final reporting, not the box as a blocker.
if (PairClearance(index, i, positions).Distance < 0)
return 0;
var hit = SpatialQuery.DirectionalDistance(
CloneEntitiesAt(moving.Boundaries, positions[index]),
CloneEntitiesAt(stationary.Boundaries, positions[i]), direction,