wo80
42 lines
1.6 KiB
C#
42 lines
1.6 KiB
C#
using NUnit.Framework;
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using TriangleNet.Geometry;
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using TriangleNet.Tools;
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namespace TriangleNet.Tests.Tools
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{
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public class IntersectionHelperTest
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{
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[Test]
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public void TestIsPointOnSegment()
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{
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var a = new Vertex(1.0, 1.0);
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var b = new Vertex(2.0, 2.0);
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// Test point = segment start point.
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Assert.IsTrue(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(1.0, 1.0)));
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// Test point = segment end point.
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Assert.IsTrue(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(2.0, 2.0)));
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// Test point on segment.
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Assert.IsTrue(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(1.5, 1.5)));
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// Test point collinear, but not on segment.
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Assert.IsFalse(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(0.0, 0.0)));
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Assert.IsFalse(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(3.0, 3.0)));
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// Test point not on segment.
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Assert.IsFalse(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(1.5, 0.5)));
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double eps = 1e-12;
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// Test point collinear near endpoint, but not on segment.
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Assert.IsFalse(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(2.0 + eps, 2.0 + eps)));
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Assert.IsFalse(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(2.0 - eps, 2.0 + eps)));
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// Test point collinear near endpoint on segment.
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Assert.IsTrue(IntersectionHelper.IsPointOnSegment(a, b, new Vertex(2.0 - eps, 2.0 - eps)));
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}
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}
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}
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