FA-87734 / Collision detection broadphase / Member archive

Moved proxy is tested against itself · case 04

A self pair is created and one wasted test is counted.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

solve(proxies, moved): dynamic-tree pair update. For each distinct moved proxy q (first occurrence order) test every other proxy p; skip p when p also moved and p>q (that pair is found from p). Count every overlap test performed; closed intervals. Return [sorted unique [min,max] pairs, test count].

Why this case matters

Broadphase stages decide which object pairs ever reach narrowphase; a wrong boundary, ordering or bookkeeping rule silently drops real contacts or floods the solver with false candidates.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
case 0	`[[[17, 17], [17, 27], [17, 32]], 4]`	`[[[17, 27], [17, 32]], 3]`	Failed

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