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4e60cebf68
AutomaticEntryCandidatesWithFallbacks completes the uncapped catalogue with tier-3 fallbacks after the preferred points: native arc midpoints, the eight compass points of a whole circle (a pure-circle contour is now usable instead of refusing), near-convex-corner points on each incident straight edge back from the corner by 2 x the applicable lead-in length using the emitter's own SelectLeadIn semantics (non-length lead-in styles contribute 0 and the fallback is omitted, never approximated), and the exact target-facing closest point toward the caller's look-ahead. Every fallback runs through the same reflex/cusp exclusion — a raw closest point or an inset landing on a forbidden inside corner is dropped — and the same geometric duplicate merge; short edges omit an out-of-segment inset by projection parameter instead of extrapolating. No ranking and no lead-safety verdict yet.
54 lines
2.1 KiB
C#
54 lines
2.1 KiB
C#
using System;
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using OpenNest.Diagnostics;
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using OpenNest.Geometry;
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namespace OpenNest.CNC.CuttingPlanning;
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/// <summary>Automatic start preference, ordered: a lower value is more preferred.</summary>
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internal enum AutomaticEntryKind
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{
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/// <summary>A convex turn of the contour's own travel, classified exactly as emission classifies it.</summary>
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ConvexCorner = 0,
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/// <summary>The midpoint of a straight edge.</summary>
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StraightMidpoint = 1,
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/// <summary>A tangent line/arc joint. A collinear line/line split is not a joint and never appears.</summary>
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TangentJoint = 2,
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/// <summary>
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/// Tier 3 (fallback): a point on a straight edge meeting a convex corner, back from the
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/// corner by about twice the applicable lead-in length, strictly inside the edge.
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/// </summary>
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NearCorner = 3,
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/// <summary>
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/// Tier 3 (fallback): the exact native closest point facing the caller's look-ahead
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/// position (pass the arrival there when there is no next cut). Never a reflex/cusp vertex.
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/// </summary>
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TargetFacing = 4,
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/// <summary>Tier 3 (fallback): the native midpoint of an arc entity.</summary>
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ArcMidpoint = 5,
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/// <summary>Tier 3 (fallback): one of the eight compass points of a whole circle.</summary>
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CircleCompass = 6,
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}
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/// <summary>
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/// One automatic start candidate: the owned contour choice plus its preference kind and a
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/// stable geometry tie key for deterministic ranking. The choice keeps this preparation as
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/// owner; nothing here exposes or mutates the underlying shape.
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/// </summary>
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internal sealed record ContourEntryCandidate(ContourChoice Choice, AutomaticEntryKind Kind)
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{
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/// <summary>
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/// Stable geometric tie key: the point quantized to the preparation epsilon grid, so
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/// equal points rank together regardless of the entity that produced them.
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/// </summary>
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internal (long X, long Y) GeometryKey => (Quantize(Choice.Point.X), Quantize(Choice.Point.Y));
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private static long Quantize(double value) =>
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(long)System.Math.Round(value / PostVerificationGeometry.Epsilon);
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}
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