36 lines
1.5 KiB
C#
36 lines
1.5 KiB
C#
using System;
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namespace OpenNest;
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public enum RotationPolicyKind { Fixed, BoundedSweep, Automatic }
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/// <summary>Immutable rotation constraints, in radians about the geometry origin.</summary>
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public sealed class RotationPolicy
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{
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private RotationPolicy(RotationPolicyKind kind, double start, double end, double step)
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{
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if (!double.IsFinite(start) || !double.IsFinite(end) || !double.IsFinite(step))
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throw new ArgumentException("Angles must be finite.");
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Kind = kind;
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Start = start;
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End = end;
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Step = step;
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}
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public RotationPolicyKind Kind { get; }
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public double Start { get; }
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public double End { get; }
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public double Step { get; }
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public static RotationPolicy Automatic { get; } = new(RotationPolicyKind.Automatic, 0, 0, 0);
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public static RotationPolicy Fixed(double angle) => new(RotationPolicyKind.Fixed, angle, angle, 0);
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public static RotationPolicy BoundedSweep(double start, double end, double step)
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{
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if (step <= 0 || end < start) throw new ArgumentException("Sweep needs a positive step and ordered bounds.");
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return new RotationPolicy(RotationPolicyKind.BoundedSweep, start, end, step);
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}
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/// <summary>Preserves the legacy zero-step automatic sentinel; zero never means locked rotation.</summary>
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public static RotationPolicy FromLegacy(double stepAngle, double rotationStart, double rotationEnd) =>
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stepAngle == 0 ? Automatic : BoundedSweep(rotationStart, rotationEnd, stepAngle);
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}
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