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ajandClaude Opus 5.5
3d728b000e
The best-fit filter rejected pairs over a 5:1 aspect (or the plate's) unless 75% utilized. A long part such as U251-DET3 (27.4 x 3.5, aspect 7.7) is past that alone, so its tightest interlocked pairs (5.1:1) were all dropped even though they are less elongated than the part itself. On the 60 x 120 sheet that cost 12 parts: 66 placed instead of 78. The limit now widens to the part's own bounding-box aspect, so side-by-side pairs survive while end-to-end pairs of compact parts are still rejected. The learned-angle characterization nests re-captured: their 46 x 3 bar now nests as an interlocked pair, which left the Fill nest identical to a full sweep, so the notched quantity drops from 6 to 4 to keep the fixture sensitive to learned angles. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
84 lines
3.1 KiB
C#
84 lines
3.1 KiB
C#
using System.Collections.Generic;
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namespace OpenNest.Engine.BestFit
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{
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public class BestFitFilter
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{
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public double MaxPlateWidth { get; set; }
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public double MaxPlateHeight { get; set; }
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public double MaxAspectRatio { get; set; } = 5.0;
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/// <summary>
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/// A high-aspect pair is kept anyway when this much of its rotated bounding box is
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/// actual part area. Utilization is only ever an exception here, never a rejection:
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/// thin-framed, hollow, or concave (e.g. S-shaped) parts have inherently low
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/// part-to-bbox utilization, yet can nest tightly — their quality is judged by the
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/// pair bounding-box area the results are sorted on, not by utilization.
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/// </summary>
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public double UtilizationOverride { get; set; } = 0.75;
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public void Apply(List<BestFitResult> results)
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{
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var partAspects = new Dictionary<Drawing, double>(ReferenceEqualityComparer.Instance);
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foreach (var result in results)
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{
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if (!result.Keep)
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continue;
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if (
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result.ShortestSide > System.Math.Min(MaxPlateWidth, MaxPlateHeight)
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|| result.LongestSide > System.Math.Max(MaxPlateWidth, MaxPlateHeight)
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)
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{
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result.Keep = false;
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result.Reason = "Exceeds plate dimensions";
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continue;
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}
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var aspect = result.LongestSide / result.ShortestSide;
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var maxAspect = System.Math.Max(
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MaxAspectRatio,
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PartAspect(result.Candidate?.Drawing, partAspects)
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);
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if (aspect > maxAspect && result.Utilization < UtilizationOverride)
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{
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result.Keep = false;
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result.Reason = string.Format(
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"Aspect ratio {0:F1} exceeds max {1:0.#}",
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aspect,
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maxAspect
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);
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continue;
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}
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result.Reason = "Valid";
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}
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}
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/// <summary>
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/// A pair is never held to a tighter aspect limit than one part alone: two long, thin
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/// parts laid side by side are less elongated than either, so a fixed limit would reject
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/// every pair of a part longer than it. Measured on the drawing's own frame (canonical
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/// for cached pairs); any other frame only understates the aspect.
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/// </summary>
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private static double PartAspect(Drawing drawing, Dictionary<Drawing, double> cache)
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{
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if (drawing?.Program == null)
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return 0;
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if (!cache.TryGetValue(drawing, out var aspect))
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{
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var box = drawing.Program.BoundingBox();
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var shortest = System.Math.Min(box.Width, box.Length);
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aspect =
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shortest > 0 ? System.Math.Max(box.Width, box.Length) / shortest : 0;
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cache[drawing] = aspect;
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}
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return aspect;
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}
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}
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}
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