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fix(geometry): resolve blocking contacts across directional slide paths

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This commit is contained in:
aj
2026-09-27 23:24:31 -04:00
parent a04460c57b
commit 2b78fb3a75
15 changed files with 2736 additions and 945 deletions
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OpenNest.Engine/Fill/Compactor.cs
+20 -26
View File
@@ -127,24 +127,20 @@ namespace OpenNest.Engine.Fill
: PartGeometry.GetPerimeterEntities(moving)
);
// A moving part can be inside an obstacle's cutout. Omitting that
// loop would let it cross the inner wall before seeing the perimeter.
obstacleEntities[i] ??=
halfSpacing > 0
? PartGeometry.GetOffsetPerimeterEntities(obstacleParts[i], halfSpacing)
: PartGeometry.GetPerimeterEntities(obstacleParts[i]);
? PartGeometry.GetOffsetPartEntities(obstacleParts[i], halfSpacing)
: PartGeometry.GetPartEntities(obstacleParts[i]);
// Contacts left by a previous push only block directions that would
// push material into material; the kernel classifies them.
var d = SpatialQuery.DirectionalDistance(
movingEntities,
obstacleEntities[i],
direction
);
if (
d <= Tolerance.Epsilon
&& partSpacing <= Tolerance.Epsilon
&& CanNudgeWithoutOverlap(moving, obstacleParts[i], direction)
)
{
continue;
}
if (d < distance)
distance = d;
@@ -176,27 +172,25 @@ namespace OpenNest.Engine.Fill
{
for (var i = 0; i < parts.Count; i++)
{
if (candidate.Intersects(parts[i], out _))
if (!candidate.Intersects(parts[i], out _))
continue;
// Part.Intersects compares outer perimeters only. A valid insert in a
// cutout must remain an obstacle, not be discarded as already overlapping.
var a = new ShapeProfile(PartGeometry.GetPartEntities(candidate));
var b = new ShapeProfile(PartGeometry.GetPartEntities(parts[i]));
if (a.Cutouts.Count == 0 && b.Cutouts.Count == 0)
return true;
if (Collision.HasOverlap(
a.Perimeter.ToPolygonWithTolerance(0.001),
b.Perimeter.ToPolygonWithTolerance(0.001),
a.Cutouts.Select(hole => hole.ToPolygonWithTolerance(0.001)).ToList(),
b.Cutouts.Select(hole => hole.ToPolygonWithTolerance(0.001)).ToList()))
return true;
}
return false;
}
private static bool CanNudgeWithoutOverlap(Part moving, Part obstacle, Vector direction)
{
var nudge = direction * (Tolerance.Epsilon * 10);
moving.Offset(nudge);
try
{
return !moving.Intersects(obstacle, out _);
}
finally
{
moving.Offset(-nudge);
}
}
public static double Push(
List<Part> movingParts,
List<Part> obstacleParts,
OpenNest.Engine/Fill/FillExtents.cs
+5 -10
View File
@@ -83,8 +83,9 @@ namespace OpenNest.Engine.Fill
// Slide uses locations, not cached bounds; Offset already translates the box.
// Slide part2 left toward part1.
var movingLines = boundary2.GetLines(part2.Location, PushDirection.Left);
var stationaryLines = boundary1.GetLines(part1.Location, PushDirection.Right);
// Keep complete loops so the shared kernel can classify tangential contacts.
var movingLines = boundary2.GetLines(part2.Location);
var stationaryLines = boundary1.GetLines(part1.Location);
var dist = SpatialQuery.DirectionalDistance(
movingLines,
stationaryLines,
@@ -234,15 +235,9 @@ namespace OpenNest.Engine.Fill
PushDirection direction
)
{
var opposite = SpatialQuery.OppositeDirection(direction);
var movingEdges = movingBoundary.GetEdges(direction);
var stationaryEdges = stationaryBoundary.GetEdges(opposite);
return SpatialQuery.DirectionalDistance(
movingEdges,
movingLocation,
stationaryEdges,
stationaryLocation,
movingBoundary.GetLines(movingLocation),
stationaryBoundary.GetLines(stationaryLocation),
direction
);
}