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SiteCellsTests: the 2D segment distance is checked against a double reference, not only against the out form

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The closest-unclamped-2d mutant survived because both forms share one segment_closest.

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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Meta Vens 2026-10-16 18:34:55 +02:00
commit ee8b15ec2c
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packages/cultmath/tests/CultMath.Tests/SiteCellsTests.cs
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@ -293,6 +293,10 @@ public sealed class SiteCellsTests
var outForm = distance_to_segment(p, start, end, out var closest);
Assert.Equal(BitConverter.SingleToInt32Bits(outForm), BitConverter.SingleToInt32Bits(distance_to_segment(p, start, end)));
Assert.Equal(distance(p, closest), outForm);
double sx = (double)end.x - start.x, sy = (double)end.y - start.y, qx = (double)p.x - start.x, qy = (double)p.y - start.y;
var t2 = sx * sx + sy * sy > 0.0 ? Math.Clamp((qx * sx + qy * sy) / (sx * sx + sy * sy), 0.0, 1.0) : 0.0;
var expected2 = Math.Sqrt(Math.Pow(qx - t2 * sx, 2) + Math.Pow(qy - t2 * sy, 2));
Assert.Equal(expected2, outForm, 1.0e-4 * (1.0 + expected2));
var p3 = new float3(Span(r, 5.0f), Span(r, 5.0f), Span(r, 5.0f));
var a3 = new float3(Span(r, 5.0f), Span(r, 5.0f), Span(r, 5.0f));