aj
fc9e46cad3
Replace the Terra scaffold with an independent configuration-space contact placer and bounded stock-plan search. Include plugin tests, synthetic and DXF benchmark drivers, results, and deployment documentation. Correct shared collision clipping and hole subtraction so curved-hole inserts validate consistently. Cover translated layouts, spacing violations, operand order, winding, and independent boolean-area comparisons. Validation: 1,293 tests passed with 12 fixture skips; all 34 synthetic/generated and four DXF cases are valid and complete.
65 lines
3.1 KiB
C#
65 lines
3.1 KiB
C#
using Clipper2Lib;
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using OpenNest.Geometry;
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using M = System.Math;
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namespace OpenNest.Engine.Astra;
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/// <summary>Per-solve configuration-space cache, never a shared mutable geometry cache.</summary>
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internal sealed class ContactGeometry
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{
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private readonly Dictionary<(int, int, double), PathsD> cache = new();
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internal PathsD Forbidden(ShapeVariant stationary, ShapeVariant moving, double spacing, CancellationToken token)
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{
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var key = (stationary.Id, moving.Id, spacing);
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if (cache.TryGetValue(key, out var value)) return value;
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token.ThrowIfCancellationRequested();
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PathsD paths;
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if (stationary.BoxLike && moving.BoxLike)
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{
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// Exact axis-aligned rectangle contacts need four configuration-space
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// vertices, not hundreds of round-offset samples. The square corner is
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// conservative for diagonal clearance and leaves row/column fits exact.
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var gap = spacing;
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paths = new PathsD { new PathD {
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new(-moving.Width - gap, -moving.Height - gap),
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new(stationary.Width + gap, -moving.Height - gap),
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new(stationary.Width + gap, stationary.Height + gap),
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new(-moving.Width - gap, stationary.Height + gap) } };
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if (cache.Count >= 8192) cache.Clear();
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return cache[key] = paths;
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}
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if (stationary.Convex && moving.Convex)
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{
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var nfp = NoFitPolygon.ComputeConvex(stationary.Hull, moving.Hull);
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paths = new PathsD { ClipperBridge.ToPath(nfp, positive: true) };
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}
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else
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{
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// Minkowski edge quads may enclose spurious interior voids. Filling all
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// positive outer paths is conservative for solid perimeter nesting; real
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// part holes are searched separately and checked against material regions.
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var a = ToInteger(stationary.ContactOutline, false);
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var b = ToInteger(moving.ContactOutline, true);
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var sum = Clipper.MinkowskiSum(b, a, true);
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paths = new PathsD(sum.Where(Clipper.IsPositive).Select(path => new PathD(
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path.Select(p => new PointD(p.X / GeometryPrecision.Scale, p.Y / GeometryPrecision.Scale)))));
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}
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token.ThrowIfCancellationRequested();
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var delta = spacing + stationary.ContactError + moving.ContactError
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+ (stationary.Curved || moving.Curved ? 0.003 : spacing > 0 ? 0.0003 : 0);
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if (delta > 0) paths = Clipper.InflatePaths(paths, delta, JoinType.Round,
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EndType.Polygon, 2, GeometryPrecision.Digits, 0.00001);
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// Bound cache residency for jobs with many distinct rotation pairs.
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if (cache.Count >= 8192) cache.Clear();
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return cache[key] = paths;
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}
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private static Path64 ToInteger(Polygon polygon, bool reflect)
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{
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var scale = reflect ? -GeometryPrecision.Scale : GeometryPrecision.Scale;
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var path = ClipperBridge.ToPath(polygon, positive: true);
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return new Path64(path.Select(p => new Point64((long)M.Round(p.x * scale), (long)M.Round(p.y * scale))));
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}
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}
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