The sim lines are the PR's (content/enemies/invisible.js kitBoneSpike: profile blockFree and canTarget, the hidden
selection over rangeRadius + the ally collider), so the contributor is the author of this commit; the maintainer side
checked each rule, kept the engine's single target when the hidden list is empty, and wrote the tests.
Official: PRTS 假想敌：骨刺, 级别0 天赋 (on the page since 2025-11, PRTS editors): 「自身普通攻击索敌不受阻挡影响」 「不会攻击
飞行单位，隐匿（解除阻挡0秒后恢复）」 「隐匿期间可同时攻击3个目标」; enemy_database's level description 「隐匿；隐匿状态下同时攻击
3个目标。」 (the handbook line keeps 「数个目标」) — the 3 is no longer [ASSUMED]. blockFree works as for 自制投石机 (a 隐匿 /
迷彩 blocker is no target); canTarget as the engine's other 不会攻击飞行单位 enemies; the hidden 3 are picked among the
allies its normal attack could hit (ai.js attackTargets: rangeRadius + ALLY_COLLIDER_RADIUS, PRTS 作战机制 碰撞体积) — they
were picked within the bare 2.0. Stealth back 0 s after a block was already so.
Golden: roster-018 — the 骨刺 in it lands one more attack (on 异客; dmg 2434 → 2771), the same move PR #365 reported.
- server/sim/detmath.js: hypot (sqrt of the squares, rescaled outside 2^±500), powi (integer powers in double-double,
one rounding), sin / cos (fdlibm 5.3) and atan2 (fdlibm / FreeBSD msun) built only from correctly rounded IEEE
operations; the sim's Math.hypot / sin / cos / atan2 / pow calls go through it (65 files); eslint.config.js forbids
the approximated Math functions under server/sim and test/sim/detmath.test.js scans for them.
- sin / cos / atan2 are the algorithms V8 runs in Node, so the server's results stay; only hypot differs from V8's.
Golden: 2 moved — diy-027 (a hypot distance, damage +80) and coop3-ABYSS-5 (a later card pick from round 9, same end).
- Applied unchanged after review (Grok static review: MERGE; the diff read in full: no network, no new dependency).
- Tests: broad node --test 5155 / 5155 with the new file tracked (detmath 7 / 7, package 10 / 10); lint 0 errors,
typecheck, check:imports.
Sukvii