卫戍协议：盟约 web remake — initial import
Online co-op browser remake of Arknights' Stronghold Protocol: Alliance (client-simulated combat, official waves/bonds/items/strategies, 3D board, facing wheel, operator loadout, official emotes, deployment scripts).
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// server/sim/damage.js — damage & heal pipeline, shields, dodge, element gauges (DESIGN §5.5).
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//
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// dealDamage order: (element → gauge path) | invulnerable? → 'hit' hook (mutable DamageInfo, may set cancel)
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// → dodge (phys/arts, canDodge) → mitigation (phys: DEF, arts: RES, true: none)
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// → × source dmgDealtMul (× phys/artsDealtMul) × target dmgTakenMul × type-taken mul × dmg.mul
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// → shields (hit-negating barriers first, then HP shields) → HP loss (boss pool routing) → 'damaged' hook
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// → SP-on-hurt / TAKE_DAMAGE trigger → fatal/kill.
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// Phys: max(A − max(0, D×(1−defIgnorePct) − defIgnoreFlat), 5 %·A); Arts: max(A×(1 − R′/100), 5 %·A) with
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// R′ = max(0, R×(1−resIgnorePct) − resIgnoreFlat); True: A.
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// Element damage ('element' type + element) fills a gauge instead of HP (1000; enemy leaders 2000). A full gauge
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// bursts with the official term-table effects (constants.js ELEMENT), which differ by the side hit:
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// operators (enemy damage): burn 1200 arts + RES −20 10 s · neural 1000 true + stun 10 s · apoptosis 15 s: no skill
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// activation, −1 SP/s, 100 arts/s · erosion 800 phys + permanent DEF −100.
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// enemies (operator damage, "·我方"): burn 7000 元素伤害 + RES −20 (10 s) · neural 6000 元素伤害 + 3 麻痹 (10 s) ·
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// apoptosis 15 s: 50 % weaken recovering over the burst + 800 元素伤害/s · erosion 5000 元素伤害 + permanent DEF −120 (8 s).
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// necrosis (legacy spare gauge): 12 s of 100 true dmg/s and ATK −20 %.
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// The gauge stays locked (full) for the burst duration ("冷却") and resets to 0 when it ends. A burst that is still
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// resolving (its `elementBurst` hook runs before the `<el>Burst` lock exists; erosion on operators has no lock at all)
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// already counts as locked (`unit.burstPending[el]`): same-element fills of that unit are refused until it has resolved,
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// so a hook that spreads the element back (淤困 parasite hosts next to each other) cannot re-burst it recursively.
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// 元素伤害 (HP damage of an element) is the DamageInfo type 'elemental' (+ optional `element` for display): no DEF/RES,
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// no dodge, × source dmgDealtMul × target dmgTakenMul × elemTakenMul. Sleeping units (沉睡: 无敌) take no damage
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// unless the attacker's profile has `hitSleep` or the damage carries `ignoreSleep`.
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import { MIN_DAMAGE_RATIO, ELEMENT, PALSY_MAX } from './constants.js';
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const clamp01 = (v) => (v < 0 ? 0 : v > 1 ? 1 : v);
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/** Normalise a DamageInfo descriptor. */
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export function makeDamageInfo(d = {}) {
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const type = d.type ?? 'phys';
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return {
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_norm: true,
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amount: Number.isFinite(+d.amount) ? +d.amount : 0,
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type,
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element: d.element ?? null,
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atkScale: d.atkScale ?? 1,
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defIgnoreFlat: d.defIgnoreFlat ?? 0,
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defIgnorePct: d.defIgnorePct ?? 0,
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resIgnoreFlat: d.resIgnoreFlat ?? 0,
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resIgnorePct: d.resIgnorePct ?? 0,
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mul: d.mul ?? 1,
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canDodge: d.canDodge ?? (type === 'phys' || type === 'arts'),
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isSkill: !!d.isSkill,
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isSplash: !!d.isSplash,
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isAttack: !!d.isAttack,
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isProjectile: !!d.isProjectile,
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tags: d.tags ?? [],
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cancel: false,
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noSp: !!d.noSp,
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ignoreSleep: !!d.ignoreSleep,
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attackId: d.attackId ?? 0,
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};
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}
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/** 沉睡 (ba.sleep "无敌且无法行动"): only attackers whose profile has `hitSleep` (or `ignoreSleep` damage) reach a sleeper. */
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function sleepBlocks(target, source, dmg) {
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return !!target.s.flags.sleep && !dmg.ignoreSleep && !(source && source.profile && source.profile.hitSleep);
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}
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/** Pure mitigation formula (exported for tests). */
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export function mitigate(amount, type, target, ign = {}) {
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if (type === 'phys') {
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const D = target.def ?? 0;
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const eff = Math.max(0, D * (1 - clamp01(ign.defIgnorePct ?? 0)) - (ign.defIgnoreFlat ?? 0));
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return Math.max(amount - eff, MIN_DAMAGE_RATIO * amount);
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}
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if (type === 'arts') {
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const R = target.res ?? 0;
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const eff = Math.max(0, R * (1 - clamp01(ign.resIgnorePct ?? 0)) - (ign.resIgnoreFlat ?? 0));
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return Math.max(amount * (1 - Math.min(100, eff) / 100), MIN_DAMAGE_RATIO * amount);
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}
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return amount;
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}
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/** Absorb damage with shields on `target`. Returns the remaining amount. */
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export function absorbShields(battle, target, amount) {
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if (amount <= 0) return 0;
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let changed = false;
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let rest = amount;
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for (let i = 0; i < target.buffs.length && rest > 0; i++) {
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const b = target.buffs[i];
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if (b.shieldHits > 0) {
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b.shieldHits--;
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rest = 0;
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if (b.shieldHits <= 0 && !(b.shield > 0) && !b.mods && !b.flags) { battle._removeBuffAt(target, i); i--; }
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changed = true;
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break;
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}
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}
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for (let i = 0; i < target.buffs.length && rest > 0; i++) {
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const b = target.buffs[i];
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if (b.shield > 0) {
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const take = Math.min(b.shield, rest);
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b.shield -= take;
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rest -= take;
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changed = true;
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if (b.shield <= 1e-9) {
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b.shield = 0;
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if (!b.mods && !b.flags && !(b.shieldHits > 0)) { battle._removeBuffAt(target, i); i--; }
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}
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}
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}
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if (changed) target.markDirty();
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return rest;
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}
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/**
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* Full damage pipeline. Returns the HP actually removed (0 when dodged/cancelled/absorbed).
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*/
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export function dealDamage(battle, source, target, dmgIn) {
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if (!target || !target.alive || target.removed || target.hidden || !target.deployed) return 0;
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const dmg = dmgIn && dmgIn._norm ? dmgIn : makeDamageInfo(dmgIn);
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if (dmg.type === 'element') return applyElement(battle, source, target, dmg);
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let ts = target.s;
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if (ts.flags.invulnerable || sleepBlocks(target, source, dmg)) return 0;
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if (battle._hooks.hit) {
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battle.emit('hit', { source, target, dmg });
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if (dmg.cancel || !target.alive || !target.deployed) return 0;
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if (dmg.type === 'element') return applyElement(battle, source, target, dmg);
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ts = target.s; // handlers may have changed the target's buffs (fragile, invulnerable, dodge…): never use stale stats
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if (ts.flags.invulnerable || sleepBlocks(target, source, dmg)) return 0;
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}
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const type = dmg.type;
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// dodge
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if (dmg.canDodge && (type === 'phys' || type === 'arts')) {
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const p = type === 'phys' ? ts.dodgePhys : ts.dodgeArts;
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if (p > 0 && battle.rng() < p) {
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battle.fx('dodge', { x: target.x, y: target.y, id: target.id });
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if (battle._hooks.dodge) battle.emit('dodge', { source, target, dmg });
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return 0;
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}
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}
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// 频次 units (flags hitCount / hitCountArts): every damage instance removes exactly 1 HP (maxHp = hits needed);
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// hitCountArts ignores physical instances. The instance keeps its own DamageInfo, so `damaged` handlers still
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// recognise their own (tagged) damage — never re-create such a loss with a fresh loseHp.
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if (ts.flags.hitCount || ts.flags.hitCountArts) {
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const counts = !(ts.flags.hitCountArts && !ts.flags.hitCount && type === 'phys');
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return applyHpLoss(battle, source, target, absorbShields(battle, target, counts ? 1 : 0), dmg);
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}
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const ss = source && source.s ? source.s : null;
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let final = mitigate(dmg.amount, type, ts, {
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defIgnorePct: dmg.defIgnorePct + (ss ? ss.defIgnorePct : 0),
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defIgnoreFlat: dmg.defIgnoreFlat + (ss ? ss.defIgnoreFlat : 0),
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resIgnorePct: dmg.resIgnorePct + (ss ? ss.resIgnorePct : 0),
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resIgnoreFlat: dmg.resIgnoreFlat + (ss ? ss.resIgnoreFlat : 0),
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});
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let mul = dmg.mul * ts.dmgTakenMul;
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if (ss) mul *= ss.dmgDealtMul * (type === 'phys' ? ss.physDealtMul : type === 'arts' ? ss.artsDealtMul : 1);
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mul *= type === 'phys' ? ts.physTakenMul : type === 'arts' ? ts.artsTakenMul : type === 'elemental' ? ts.elemTakenMul : ts.trueTakenMul;
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final *= mul;
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if (!(final > 0) || !Number.isFinite(final)) final = 0;
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final = absorbShields(battle, target, final);
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return applyHpLoss(battle, source, target, final, dmg);
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}
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/**
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* Remove HP (after mitigation) and run damaged/fatal/kill bookkeeping. Also used by `battle.loseHp` (流失).
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*/
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export function applyHpLoss(battle, source, target, amount, dmg) {
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if (!target.alive) return 0;
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let dealt = 0;
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if (target.bossPool) {
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const pool = target.bossPool;
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const before = pool.hp;
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const pid = source && source.side === 'ally' ? source.ownerId : null;
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if (amount > 0) {
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try { pool.damage(pid, amount); } catch (e) { battle._internalError('bossPool.damage', e); pool.hp = Math.max(0, pool.hp - amount); }
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}
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dealt = Math.max(0, before - pool.hp);
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if (!Number.isFinite(dealt)) dealt = 0; // a misbehaving pool (NaN hp) must not poison damage stats
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if (pid != null) { const pp = battle._pp(pid); if (pp) pp.bossDamage += dealt; }
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battle._syncBossHp(target);
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} else {
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const before = target.hp;
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target.hp -= amount;
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if (target.hp <= 0) {
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target.hp = 0;
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if (battle._hooks.fatal) {
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const fctx = { unit: target, source, dmg, amount, prevented: false };
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battle.emit('fatal', fctx);
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if (fctx.prevented && target.alive) { if (target.hp < 1) target.hp = Math.min(1, target.s.maxHp); }
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}
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}
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dealt = Math.max(0, before - Math.max(0, target.hp));
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}
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if (source) {
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source.stats.dmg += dealt;
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if (source.side === 'ally' && source.ownerId != null) { const pp = battle._pp(source.ownerId); if (pp) pp.damageDealt += dealt; }
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}
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target.stats.taken += dealt;
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target.lastHitAt = battle.time;
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if (dmg && !dmg.silent && amount >= 0.5) {
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const shown = dmg.type === 'element' ? dmg.element : dmg.type === 'elemental' ? (dmg.element || 'true') : dmg.type;
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battle._ev(['dmg', target.id, Math.round(amount), shown]);
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}
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if (battle._hooks.damaged) battle.emit('damaged', { source, target, amount, type: dmg ? dmg.type : 'true', dmg });
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if (target.side === 'ally' && target.skill && dmg && !dmg.noSp && dmg.type !== 'element') battle._skills.onDamaged(target);
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const dead = target.bossPool ? target.bossPool.hp <= 0 : target.hp <= 0;
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if (dead && target.alive) battle.kill(target, source);
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return dealt;
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}
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/** Is `target`'s `el` gauge locked: its `<el>Burst` buff is up, or its burst is resolving right now (see header). */
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export function burstLocked(target, el) {
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return !!(target.burstPending && target.burstPending[el]) || !!target.findBuff(el + 'Burst');
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}
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/** Element gauge accumulation + burst. Fires `elementHit` { source, target, dmg } first (mutable amount/mul, cancel). */
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export function applyElement(battle, source, target, dmg) {
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const el = dmg.element;
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if (!el || !(el in target.elem)) return 0;
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if (target.s.flags.invulnerable || sleepBlocks(target, source, dmg)) return 0;
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if (burstLocked(target, el)) return 0;
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if (battle._hooks.elementHit) {
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battle.emit('elementHit', { source, target, dmg });
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if (dmg.cancel || !target.alive || !target.deployed || burstLocked(target, el)) return 0;
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if (dmg.type !== 'element') return dealDamage(battle, source, target, dmg); // a handler converted it
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}
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const max = target.gaugeMax;
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let amt = dmg.amount * dmg.mul * target.s.elemTakenMul * (1 - clamp01(target.def?.epDamageResistance ?? 0));
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if (!(amt > 0) || !Number.isFinite(amt)) return 0;
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target.elem[el] = Math.min(max, target.elem[el] + amt);
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battle._ev(['dmg', target.id, Math.round(amt), el]);
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if (source) source.stats.elem = (source.stats.elem ?? 0) + amt;
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if (battle._hooks.damaged) battle.emit('damaged', { source, target, amount: amt, type: 'element', dmg });
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if (target.elem[el] >= max && target.alive) elementBurst(battle, source, target, el);
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return amt;
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}
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/**
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* A burst (see header): side-aware official effects; the `<el>Burst` buff locks the gauge for its duration. The unit
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* is marked `burstPending[el]` while the burst resolves (hook, lock, hits), so nothing re-bursts it in the meantime.
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*/
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export function elementBurst(battle, source, target, el) {
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if (!ELEMENT[el] || !target.alive || burstLocked(target, el)) return;
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const pending = target.burstPending || (target.burstPending = {});
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pending[el] = true;
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try { resolveBurst(battle, source, target, el); } finally { pending[el] = false; }
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}
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function resolveBurst(battle, source, target, el) {
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const cfg = ELEMENT[el];
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target.elem[el] = target.gaugeMax;
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const reset = () => { target.elem[el] = 0; };
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battle.fx('burst', { x: target.x, y: target.y, id: target.id, element: el });
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if (battle._hooks.elementBurst) battle.emit('elementBurst', { source, target, element: el });
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if (!target.alive) { reset(); return; }
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const tags = ['burst', el];
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const hit = (amount, type) => battle.dealDamage(source, target, { amount, type, element: el, canDodge: false, tags });
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const lock = (duration, extra = {}) => {
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if (!(duration > 0)) { reset(); return null; }
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return battle.addBuff(target, { key: `${el}Burst`, duration, visible: true, onExpire: reset, onRemove: reset, ...extra, flags: { burstLock: true, ...(extra.flags || {}) } });
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};
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if (el === 'necrosis') {
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lock(cfg.duration, {
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mods: { atkMul: 1 - cfg.atkDownPct }, interval: 1,
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onTick: () => battle.dealDamage(source, target, { amount: cfg.dps, type: 'true', canDodge: false, tags: ['burst', 'necrosis'] }),
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});
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return;
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}
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const enemy = target.side === 'enemy';
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const c = enemy ? cfg.enemy : cfg.ally;
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if (el === 'burn') {
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lock(c.duration, { mods: { resFlat: -c.resDown } });
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if (enemy) hit(c.elemDamage, 'elemental'); else hit(c.damage, c.type);
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} else if (el === 'neural') {
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lock(c.duration);
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if (enemy) {
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hit(c.elemDamage, 'elemental');
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if (target.alive) battle.applyStatus(target, 'palsy', { value: c.palsy, source });
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} else {
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hit(c.damage, c.type);
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if (target.alive) battle.applyStatus(target, 'stun', { duration: c.stun, source, force: true });
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}
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} else if (el === 'apoptosis') {
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if (enemy) {
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// 50 % 虚弱 that recovers linearly over the burst, 800 元素伤害 per second
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lock(c.duration, {
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mods: { atkMul: 1 - c.weaken }, interval: 1,
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onTick: ({ buff }) => {
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buff.mods = { atkMul: 1 - c.weaken * Math.max(0, buff.timeLeft - 1) / c.duration };
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target.markDirty();
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hit(c.elemDps, 'elemental');
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},
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});
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} else {
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// 15 s: no skill activation, −1 SP per second, 100 arts damage per second
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lock(c.duration, {
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flags: { silence: true }, interval: 1,
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onTick: () => {
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const sk = target.skill;
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if (sk && !sk.noSkill && sk.kind !== 'passive' && !(sk.active && sk.isTimed) && sk.sp > 0) sk.sp = Math.max(0, sk.sp - c.spLossPerSec);
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hit(c.dps, c.dpsType);
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},
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});
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}
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} else if (el === 'erosion') {
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// the permanent DEF cut lands first, then the hit
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lock(c.duration);
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battle.addBuff(target, { key: 'erosionDown', refresh: 'stack', stacks: 1, maxStacks: 1e6, mods: { defFlat: -c.defDown }, visible: true });
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if (enemy) hit(c.elemDamage, 'elemental'); else hit(c.damage, c.type);
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}
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}
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/** Add `n` 麻痹 stacks (at most PALSY_MAX). */
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export function palsyBuff(n) {
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const stacks = Math.max(1, Math.min(PALSY_MAX, Math.floor(Number.isFinite(n) ? n : 1)));
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return { key: 'palsy', refresh: 'stack', stacks, maxStacks: PALSY_MAX, visible: true, status: 'palsy' };
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}
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/** Reduce an element gauge (e.g. wandermedic "回复元素损伤"). Returns the amount removed. */
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export function reduceElement(target, amount, el = null) {
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let removed = 0;
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const els = el ? [el] : Object.keys(target.elem);
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for (const k of els) {
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if (burstLocked(target, k)) continue;
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const take = Math.min(target.elem[k], amount - removed);
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if (take > 0) { target.elem[k] -= take; removed += take; }
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if (removed >= amount) break;
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}
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return removed;
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}
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/** Heal pipeline. Returns the HP actually restored. */
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export function heal(battle, source, target, amount, opts = {}) {
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if (!target || !target.alive || target.removed || !target.deployed || target.bossPool) return 0;
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const self = source === target || !!opts.self;
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if (!self && (target.s.flags.noHeal || (target.profile && target.profile.noHeal))) return 0;
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let amt = amount * (source && source.s ? source.s.healingDealtMul : 1) * target.s.healingTakenMul;
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||||
if (!(amt > 0) || !Number.isFinite(amt)) return 0;
|
||||
if (battle._hooks.heal) {
|
||||
const ctx = { source, target, amount: amt, opts };
|
||||
battle.emit('heal', ctx);
|
||||
amt = Number.isFinite(ctx.amount) ? Math.max(0, ctx.amount) : 0;
|
||||
// a handler may have killed / retreated the target: healing a dead unit would leave it "dead with hp > 0"
|
||||
if (!target.alive || !target.deployed) return 0;
|
||||
}
|
||||
const max = target.s.maxHp;
|
||||
const actual = Math.max(0, Math.min(amt, max - target.hp));
|
||||
target.hp = Math.min(max, target.hp + actual);
|
||||
if (opts.overheal && amt > actual) {
|
||||
// overheal becomes a shield (capped at max HP) so hp stays within [0, maxHp]
|
||||
const cur = target.findBuff('overheal');
|
||||
const val = Math.min(max, (cur ? cur.shield : 0) + (amt - actual));
|
||||
battle.addBuff(target, { key: 'overheal', shield: val, duration: opts.overhealDuration ?? Infinity });
|
||||
}
|
||||
if (source) {
|
||||
source.stats.heal += actual;
|
||||
if (source.side === 'ally' && source.ownerId != null) { const pp = battle._pp(source.ownerId); if (pp) pp.healingDone += actual; }
|
||||
}
|
||||
if (actual >= 0.5 && !opts.silent) battle._ev(['heal', target.id, Math.round(actual)]);
|
||||
return actual;
|
||||
}
|
||||
Reference in new issue
Block a user