FA-51448 / Raster clipping / Member archive

User distance clip cull: cull reject any · case 03

Cull distances reject primitives with one negative vertex rather than requiring the full primitive outside.

Member previewVariant 3 · 3 implementations · 15 checks per implementation

Case contract

Each primitive carries per-vertex clip-distance and cull-distance arrays, active bitmasks and a raster-discard flag. A primitive is rejected if every vertex is negative on any one enabled clip or cull plane. Surviving primitives need clipping if any enabled clip distance is negative; cull distances never cause partial clipping. Missing components default to zero and disabled plane bits are ignored. Empty primitives and raster-discarded primitives emit discarded. Only low size plane slots exist.

Why this case matters

Raster clip state can leak coverage across draws even when every individual region is valid.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
explicit sequence 3	`["discarded"]`	`["accepted"]`	Failed

MEMBER ARCHIVE

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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