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ajandClaude Opus 5.5
a7c0747e11
Model the machine's support bed as a grid of contact points measured from the plate origin, and check each part's center of gravity against the convex hull of the grid points under its material. The bed is extensible so straight and CAD-imported curved slats can follow. - Core: SupportBed/SupportGrid, SupportMaterial and SupportAnalyzer (margin with registration tolerance, best single tab point) - Nest-wide support bed that every plate follows, saved in plateDefaults.supportBed; machine defaults in support-grid.json - CuttingParameters.SupportTabs: Plan Cutting tabs only unsupported parts and limits their perimeter entries to points where the tab steadies the part, falling back to any fitting entry - Desktop: Nest > Support Grid..., View > Draw Support overlay and a "Tab parts the support grid cannot hold level" tab option - docs/support-tabs.md, nest file format and planner notes Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
66 lines
3.3 KiB
C#
66 lines
3.3 KiB
C#
using System;
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using System.Collections.Generic;
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using OpenNest.Geometry;
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namespace OpenNest.Support
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{
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/// <summary>
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/// What a cut part rests on: the machine's support bed, fixed to the machine and measured
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/// from the plate origin into the sheet, so its position on any sheet follows from the
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/// sheet's quadrant alone. A layout only reports where it touches material; the
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/// <see cref="SupportAnalyzer"/> decides from those contacts whether a part stays level.
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/// The laser grid (<see cref="SupportGrid"/>) is the built-in layout; straight or curved
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/// slats imported from a CAD layout can follow as further subclasses.
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/// </summary>
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public abstract class SupportBed : IEquatable<SupportBed>
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{
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protected SupportBed(double registrationTolerance, double stabilityMargin)
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{
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if (!double.IsFinite(registrationTolerance) || registrationTolerance < 0)
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throw new ArgumentOutOfRangeException(nameof(registrationTolerance),
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"Registration tolerance must be finite and zero or more.");
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if (!double.IsFinite(stabilityMargin) || stabilityMargin < 0)
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throw new ArgumentOutOfRangeException(nameof(stabilityMargin),
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"Stability margin must be finite and zero or more.");
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RegistrationTolerance = registrationTolerance;
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StabilityMargin = stabilityMargin;
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}
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/// <summary>
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/// How far a sheet may sit from its nominal place on the bed, along each axis. The
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/// analyzer checks the bed shifted by up to this much and keeps the worst result.
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/// </summary>
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public double RegistrationTolerance { get; }
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/// <summary>
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/// How far inside its contacts a part's center of gravity must lie for the part to count
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/// as supported; it allows for slag, gas pressure and a contact that is worn low.
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/// </summary>
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public double StabilityMargin { get; }
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/// <summary>
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/// The contacts under <paramref name="material"/> (world coordinates) on a sheet in
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/// <paramref name="quadrant"/>, with the bed moved by <paramref name="shift"/>. With
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/// <paramref name="extremesOnly"/>, a layout may omit contacts that cannot be corners of
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/// their convex hull; the analyzer needs no others.
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/// </summary>
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public abstract IReadOnlyList<Vector> Contacts(SupportMaterial material, int quadrant, Vector shift,
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bool extremesOnly = false);
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/// <summary>This layout with every length multiplied by <paramref name="factor"/> (a unit change).</summary>
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public abstract SupportBed Scaled(double factor);
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public abstract bool Equals(SupportBed other);
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public override bool Equals(object obj) => obj is SupportBed other && Equals(other);
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public abstract override int GetHashCode();
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/// <summary>-1 where a sheet in <paramref name="quadrant"/> lies on the negative side of the origin along X.</summary>
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protected static double SignX(int quadrant) => quadrant is 2 or 3 ? -1 : 1;
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/// <summary>-1 where a sheet in <paramref name="quadrant"/> lies on the negative side of the origin along Y.</summary>
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protected static double SignY(int quadrant) => quadrant is 3 or 4 ? -1 : 1;
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}
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}
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