- Fixed An_extremely_small_edge_delta_falls_back_to_the_edge_midpoint (renamed
A_tiny_but_normal_edge_delta_...): it pinned the wrong value (1/6) for the
fallback that F3's production commit deleted; now asserts the exact
interpolated value, hand-derived in double precision independently of
Interpolate. Added a genuinely subnormal-delta sibling test.
- Added two more vertex-placement fixtures (crossing counts 4 and 6) to kill
the sum/count -> sum/3 mutant, each with a hand-derived expected mean.
Counts of 1 and 2 from the finding are not used: a single cell's 12 edges
form the cube graph Q3 (3-regular, 8 vertices), whose edge-cut size for any
corner sign pattern is never 1 or 2 for any nonzero cut (minimum nonzero
cut is 3, already covered by the existing symmetric/unequal fixtures) -
see the fork note in this cut's report.
- Added three corner-order pinning tests (one per axis), each asserting the
exact welded vertex at each of Quads[0..3] for a chosen edge against a
hand-computed position, including the axis-1 v1/v3 swap that F4's fixed
OrientationSign now performs. These kill the axis-0-mirrored, c0/c2-swapped
and equivalent per-axis corner-order mutants.
- Added four degenerate-quad orientation tests (sample exactly at iso,
large-origin/tiny-cellSize sphere, octahedron at iso, tiny-tolerance
sphere) asserting every shared undirected edge is traversed in opposite
directions (net zero), via a new AssertEdgeDirectionsBalance helper that
also covers the 4-use case. Restricted the existing
Every_quad_winds_outward_from_inside_to_outside test's geometric check to
non-degenerate (non-zero cross product) quads, per spec.
- Added Grid_edge_inequality_is_the_negation_of_equality (F6: != is compiler-
mandated alongside ==, and needed its own direct test) and
A_non_finite_sample_is_rejected (F7: NaN and +-Infinity samples).
All 38 SurfaceNetsTests pass; the 7 pre-existing GeometryDocumentTests
failures from CultLib commit e420410 are untouched.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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