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cultmath: span tests: the float arm of the near-zero midpoint test carries the accumulation bound of its octave reads; previous commit's new test failed on 7e-9 of float noise (builds, one new test red)

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Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
This commit is contained in:
Meta Vens 2026-10-15 23:13:30 +02:00
commit 15730d4e99
1 changed files with 2 additions and 2 deletions
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4
packages/cultmath/tests/CultMath.Tests/SpanStageTests.cs
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@ -704,10 +704,10 @@ public sealed class SpanStageTests
var speed = loose ? 4.0f * (abs(q.x) + abs(q.y) + abs(q.z) + 20.0f) : 0.0f;
var span = new Span(new SpanPath { midpoint = q, velocity = None, speed = speed, acceleration = 0.0f, halfLength = loose ? 1.0f : 0.0f }, None);
var fold = stage.Ridged(span.Path).fold;
var (departureFloat, departureExact, _) = BranchDeparture(stage, span, 2);
var (departureFloat, departureExact, rounding) = BranchDeparture(stage, span, 2);
Assert.Equal(0.0f, stage.Fbm(span.Path).fold);
Assert.True(departureExact <= fold * (1.0 + 1.0e-3) + 1.0e-9, $"midpoint {q}, speed {speed:R}: the exact branch departure is {departureExact:R}, above fold {fold:R}");
Assert.True(departureFloat <= fold * (1.0 + 1.0e-3) + 1.0e-9, $"midpoint {q}, speed {speed:R}: the float branch departure is {departureFloat:R}, above fold {fold:R}");
Assert.True(departureFloat <= fold * (1.0 + 1.0e-3) + 1.0e-9 + rounding, $"midpoint {q}, speed {speed:R}: the float branch departure is {departureFloat:R}, above fold {fold:R}");
if (departureExact > 0.0)
crossing++;
}