sample_aliasing_does_not_certify_spline_caps built its trap as one polynomial of degree 17 with
a root at each of the 17 old sample locations k/16 (and a circle times such a polynomial, degree
19). A B-rep record holds splines up to degree 16 (MAX_SPLINE_DEGREE, #8618), so no record can
carry either and the evaluator refuses them: the test failed before testing anything. The trap
is now a C0 spline with a knot at every k/16: a quadratic on the line at each knot, bowing 1 mm
off it half way along the first span; and the quarter circle of radius 10 with its homogeneous
coordinates scaled by 1 + bump / 10, radius 10 at every knot and 11 at 1/32. Sampling at the old
locations still sees a line and a circle; the certifier, reading the spans' control points,
must certify neither, and doesn't.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
jyvikoandClaude Opus 5.5
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