81 lines
2.1 KiB
C#
81 lines
2.1 KiB
C#
using TraceCad.Core.Geometry;
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using TraceCad.Core.Model;
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using Xunit;
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namespace TraceCad.Tests;
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public sealed class GeometryTests
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{
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[Fact]
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public void LineLengthUsesMillimetres()
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{
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var line = new LineEntity(Guid.NewGuid(), Layer.Cut.Name, new Point2(0, 0), new Point2(3, 4));
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Assert.Equal(5.0, line.Length, 9);
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}
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[Fact]
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public void CircleFromThreePointsComputesCenterAndRadius()
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{
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var success = GeometryHelpers.TryCreateCircleFromThreePoints(
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new Point2(1, 0),
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new Point2(0, 1),
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new Point2(-1, 0),
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out var circle);
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Assert.True(success);
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Assert.Equal(0.0, circle.Center.X, 9);
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Assert.Equal(0.0, circle.Center.Y, 9);
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Assert.Equal(1.0, circle.Radius, 9);
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}
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[Fact]
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public void CircleFromCollinearPointsFails()
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{
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var success = GeometryHelpers.TryCreateCircleFromThreePoints(
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new Point2(0, 0),
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new Point2(1, 1),
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new Point2(2, 2),
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out _);
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Assert.False(success);
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}
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[Fact]
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public void ArcFromThreePointsPreservesPointOnCounterClockwiseSweep()
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{
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var success = GeometryHelpers.TryCreateArcFromThreePoints(
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new Point2(1, 0),
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new Point2(0, 1),
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new Point2(-1, 0),
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out var arc);
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Assert.True(success);
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Assert.False(arc.IsClockwise);
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Assert.Equal(0.0, arc.StartAngleDeg, 9);
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Assert.Equal(180.0, arc.EndAngleDeg, 9);
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Assert.Equal(1.0, arc.Radius, 9);
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}
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[Fact]
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public void ArcFromCollinearPointsFails()
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{
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var success = GeometryHelpers.TryCreateArcFromThreePoints(
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new Point2(0, 0),
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new Point2(5, 0),
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new Point2(10, 0),
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out _);
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Assert.False(success);
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}
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[Theory]
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[InlineData(360, 0)]
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[InlineData(-90, 270)]
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[InlineData(725, 5)]
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public void AngleNormalizationWrapsToPositiveDegrees(double input, double expected)
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{
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Assert.Equal(expected, GeometryHelpers.NormalizeAngleDeg(input), 9);
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}
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}
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