GameCult.Geometry no longer carries vector or rectangle values. CultCircle and
CultSphere hold float2/float3, the isosurface and surface-nets extractors take
float3 origin, and the per-call conversion to float3 is gone. Their MessagePack
bytes are unchanged (pinned against the pre-collapse encodings), now produced
by CultMathResolver through the default CultCache options.
This is a breaking change to the GameCult.Geometry public API.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
samples and cellSize were validated but isoValue and origin were not:
iso = NaN or +inf silently returned an empty mesh, and origin = NaN gave
NaN positions. Extend Extract's existing top-of-method validation authority
to reject non-finite isoValue and non-finite origin components with
ArgumentException, matching the existing style, with tests for each
component.
Overflow at extreme magnitudes (cellSize ~3e38, or finite samples whose
interpolation overflows to inf) is a separate, float-domain limit rather
than a validated-input error; documented in the XML doc and provenance
notes, deliberately not range-checked.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Mutating obj is CultGeometryGridEdge other && Equals(other) to && true
passed the suite: nothing exercised object.Equals directly with a mismatched
X/Y/Z/Axis, null, or an unrelated type. Add a behavioural test that checks
each component independently, rejects null and other types, and agrees with
the typed Equals and GetHashCode.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
- 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>
A --since:29e50ad Stryker pass found real gaps, all inside this cut's own
files:
- vertex-placement and normals fixtures anchored a vertex at the world
origin, so a mutated (+ instead of -) or dropped cellSize multiply was
invisible against a zero operand; moved them off the origin;
- the cube normals test only checked length, and three orthogonal
+-2-length face contributions summed to the same length no matter which
one a mutant negated; now checks the exact expected direction per vertex;
- the open-boundary rule only had an X-axis test, leaving TryGetQuadCells's
Y- and Z-axis guards (and TryGetOtherEndpoint's Y/Z cases) uncovered;
added the Y- and Z-axis twins of the existing plane test;
- the 1e-20 near-zero-delta fallback in Interpolate was never exercised;
added a fixture with an edge delta of ~3e-21;
- CultGeometryGridEdge's Equals and ToString had no direct test.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
The 4x4x4 pure-checkerboard field had no fully-interior cell: every active
cell bordered the array edge, so some crossing edges lost a quad to the open-
boundary rule and edge usage came out odd (observed: all-3) for reasons
unrelated to the ambiguity the test means to exercise. Wrapped the
checkerboard in a one-sample uniform-outside margin (5x5x5 grid, checkerboard
only on samples 1..3) so every crossing edge under test keeps all four
surrounding cells in range, isolating the even-but-not-2 claim from
open-boundary effects.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Two spots failed to build: a method-group reference to float.IsFinite and an
`is 1 or 2` pattern inside a lambda that FluentAssertions compiles as an
Expression<Func<T, bool>>; expression trees can't contain pattern-matching
`is`, and a method group isn't implicitly convertible to an expression tree
either. Rewritten as explicit lambdas with `==`/`||`.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Adds SurfaceNetsTests.cs and QuadNormalsTests.cs covering the sign
convention, edge naming, outward winding, vertex placement (midpoint and
unequal-crossing means, origin/cellSize), closed-sphere welding and
Euler characteristic, an ambiguous checkerboard cell's even-but-not-2 edge
usage, open-boundary quad suppression, determinism/ordering, and
face-weighted normals (sliver-vs-large-quad area weighting, unit cube
normals, zero-area/untouched-vertex degenerate case). Adds
stryker-config.json (vstest runner; this project is NUnit 4, not xunit.v3)
and records GameCult.Geometry as scoped, diff-only, in
docs/mutation-testing.md's follow-ups.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
