sganggs
01a44cd288
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).
212 lines
10 KiB
JavaScript
212 lines
10 KiB
JavaScript
// server/sim/units.js — Unit model (operators, tokens, enemies, devices) and stat aggregation (DESIGN §5.2).
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//
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// Aggregation (recomputed lazily whenever buffs change — `unit.markDirty()`):
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// ATK/DEF/maxHp = (base + Σflat) × (1 + Σpct) × Πmul
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// res = clamp((base + Σflat) × Πmul, 0, 100)
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// aspd = clamp(base + Σaspd, 10, 600) (base is 100 for almost everyone)
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// interval = bat × (1 + ΣbatPct) × 100 / aspd (ΣbatPct floored at −0.9)
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// moveSpeed = (base + ΣmoveFlat) × ΠmoveMul (tiles/s = moveSpeed × MOVE_SCALE)
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// massLevel = max(0, base + ΣmassFlat) (重量: displacement, 浮空 halving; 失重 = massFlat −1)
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// Changing maxHp keeps the HP ratio. The sim keeps floats; rounding happens only in snapshots.
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import { aggregateMods } from './buffs.js';
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import { flagsOf } from './snapshot.js';
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import { ASPD_MIN, ASPD_MAX, ELEMENT_GAUGE_MAX, ELEMENT_GAUGE_MAX_LEADER } from './constants.js';
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import { DIR_VEC, normDir } from './dir.js';
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const clamp = (v, a, b) => (v < a ? a : v > b ? b : v);
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const EMPTY = Object.freeze({});
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/** Aggregates can overflow (huge stacked *Mul mods → Infinity) — fall back to `d` so no stat is ever non-finite. */
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const fin = (v, d) => (Number.isFinite(v) ? v : d);
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export class Unit {
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/**
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* @param {object} init
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*/
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constructor(init) {
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// Heavy references are non-enumerable so assertion diffs / logs never walk the whole battle graph.
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for (const k of ['def', 'player', 'ownerUnit', 'kit', 'profile', 'skill', 'route', 'bossPool', 'blockedBy', 'blocking', 'carry', 'mem', 'trait']) {
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Object.defineProperty(this, k, { value: null, writable: true, enumerable: false, configurable: true });
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}
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this.id = init.id;
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this.side = init.side; // 'ally' | 'enemy'
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this.kind = init.kind; // 'op' | 'token' | 'enemy' | 'device'
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this.def = init.def; // normalised def (chess / token / enemy / device)
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this.defId = init.defId ?? init.def?.id ?? 'unknown';
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this.name = init.name ?? init.def?.name ?? this.defId;
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this.ownerId = init.ownerId ?? null; // playerId (enemies: field owner)
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this.uid = init.uid ?? null; // match piece uid (ops/tokens from the board)
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this.ownerUnit = init.ownerUnit ?? null; // summoner (tokens)
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this.x = init.x ?? 0;
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this.y = init.y ?? 0;
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this.tileR = init.tileR ?? Math.round(this.y);
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this.tileC = init.tileC ?? Math.round(this.x);
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this.homeR = this.tileR;
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this.homeC = this.tileC;
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// deploy direction (sim/dir.js; allies: from the board piece, default RIGHT); `facing` is its derived horizontal
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// sign (sprite flip only) — a legacy `init.facing` ±1 still maps to RIGHT / LEFT
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this.dir = normDir(init.dir ?? init.facing);
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this.base = {
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maxHp: 1, atk: 0, def: 0, res: 0, aspd: 100, bat: 1, blockCnt: 0, moveSpeed: 0, spRecovery: 1,
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tauntLevel: 0, massLevel: 0, hpRecoveryPerSec: 0, cost: 0, respawnTime: 0, rangeRadius: 0,
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...(init.base || {}),
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};
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/** @type {object[]} */
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this.buffs = [];
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this._dirty = true;
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this._s = null;
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this.hp = this.base.maxHp;
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this.alive = true;
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this.deployed = false;
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this.removed = false; // permanently gone (enemies, tokens, retreated-for-good)
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this.blocking = []; // ops: enemies currently blocked
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this.blockedBy = null; // enemies: blocker unit
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this.motion = init.motion ?? 'GROUND'; // enemies: 'WALK' | 'FLY'
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this.profile = null; // resolved profession/attack profile
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this.skill = null; // SkillRuntime
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this.kit = null;
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this.atkCd = 0;
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this.lastAttackAt = -Infinity;
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this.lastHitAt = -Infinity;
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this.deployedAt = -Infinity;
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this.deathAt = -Infinity;
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this.respawnAt = Infinity;
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this.deploySeq = 0;
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this.spawnSeq = 0;
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this.elem = { burn: 0, neural: 0, necrosis: 0, apoptosis: 0, erosion: 0 };
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this.burstPending = null; // { [element]: true } while that element's burst resolves (damage.js burstLocked)
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this.tags = new Set(init.tags || []);
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this.mem = {}; // free scratch space for content (per unit)
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this.trait = {}; // profession runtime state
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this.stats = { dmg: 0, kills: 0, heal: 0, taken: 0, attacks: 0 };
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this.hidden = false; // enemies inside a DISAPPEAR segment
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this.anim = 0;
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this.persist = { redeployMul: 1, freeRedeploys: 0 };
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this.isBoss = false;
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this.bossPool = null;
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}
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markDirty() { this._dirty = true; }
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/** Horizontal sign of the direction (LEFT ⇒ −1, else +1): sprite flip only — geometry uses `dir` / `fwd`. */
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get facing() { return this.dir === 'LEFT' ? -1 : 1; }
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/** Legacy setter: ±1 ⇒ RIGHT / LEFT (prefer assigning `dir`). */
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set facing(v) { this.dir = normDir(v, this.dir); }
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/** Forward vector [dRow, dCol] (UP = +row). */
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get fwd() { return DIR_VEC[this.dir] ?? DIR_VEC.RIGHT; }
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/** Aggregated stats (lazy). */
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get s() {
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if (this._dirty) this._recalc();
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return this._s;
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}
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get maxHp() { return this.s.maxHp; }
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get atk() { return this.s.atk; }
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_recalc() {
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const prevMax = this._s ? this._s.maxHp : this.base.maxHp;
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const { add, mul, flags, shield, permRangeExtend } = aggregateMods(this.buffs);
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const a = (k) => add[k] ?? 0;
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const m = (k) => mul[k] ?? 1;
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const b = this.base;
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const bHp = fin(b.maxHp, 1) > 0 ? fin(b.maxHp, 1) : 1;
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const maxHp = Math.max(1, fin((bHp + a('hpFlat')) * Math.max(0, 1 + a('hpPct')) * m('hpMul'), bHp));
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const atk = Math.max(0, fin((b.atk + a('atkFlat')) * Math.max(0, 1 + a('atkPct')) * m('atkMul'), fin(b.atk, 0)));
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const def = Math.max(0, fin((b.def + a('defFlat')) * Math.max(0, 1 + a('defPct')) * m('defMul'), fin(b.def, 0)));
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const res = clamp(fin((b.res + a('resFlat')) * m('resMul'), fin(b.res, 0)), 0, 100);
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const aspd = clamp(fin(b.aspd + a('aspd'), 100), ASPD_MIN, ASPD_MAX);
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const bBat = fin(b.bat, 1) > 0 ? fin(b.bat, 1) : 1;
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const bat = fin(bBat * Math.max(0.1, 1 + a('batPct')), bBat);
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const s = {
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maxHp, atk, def, res, aspd, bat,
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interval: (bat * 100) / aspd,
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blockCnt: Math.max(0, fin(Math.round(b.blockCnt + a('blockCnt')), 0)),
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moveSpeed: Math.max(0, fin((b.moveSpeed + a('moveFlat')) * m('moveMul'), fin(b.moveSpeed, 0))),
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rangeExtend: Math.max(0, Math.round(a('rangeExtend'))),
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baseRangeExtend: Math.max(0, fin(Math.round(permRangeExtend), 0)), // permanent part (initial range)
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massLevel: Math.max(0, fin(fin(b.massLevel, 0) + a('massFlat'), 0)),
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maxTargets: a('maxTargets'),
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// DESIGN §5.3 lists `taunt` as a buff flag (+aggro) as well as a numeric mod: the flag counts as +1 level
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taunt: (Number.isFinite(b.tauntLevel) ? b.tauntLevel : 0) + a('taunt') + (flags.taunt === true ? 1 : 0),
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dodgePhys: clamp(a('dodgePhys'), 0, 1),
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dodgeArts: clamp(a('dodgeArts'), 0, 1),
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defIgnoreFlat: a('defIgnoreFlat'),
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defIgnorePct: clamp(a('defIgnorePct'), 0, 1),
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resIgnoreFlat: a('resIgnoreFlat'),
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resIgnorePct: clamp(a('resIgnorePct'), 0, 1),
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dmgDealtMul: m('dmgDealtMul'),
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physDealtMul: m('physDealtMul'),
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artsDealtMul: m('artsDealtMul'),
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dmgTakenMul: m('dmgTakenMul'),
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physTakenMul: m('physTakenMul'),
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artsTakenMul: m('artsTakenMul'),
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trueTakenMul: m('trueTakenMul'),
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elemTakenMul: m('elemTakenMul'),
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healingDealtMul: m('healingDealtMul'),
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healingTakenMul: m('healingTakenMul'),
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atkScaleMul: m('atkScaleMul'),
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spRecovery: Math.max(0, fin((b.spRecovery + a('spRecoveryFlat')) * m('spRecoveryMul'), 0)),
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spCostFlat: a('spCostFlat'),
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redeployMul: m('redeployMul'),
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hpRegen: fin(b.hpRecoveryPerSec + a('hpRegen') + a('hpRegenRatio') * maxHp, 0),
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shield,
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flags: flags || EMPTY,
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};
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s.flags.stun = !!(flags.stun || flags.freeze || flags.sleep || flags.levitate);
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this._s = s;
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this._dirty = false;
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if (this.alive && prevMax > 0 && Math.abs(prevMax - maxHp) > 1e-9) {
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this.hp = clamp(fin(this.hp * (maxHp / prevMax), maxHp), 0, maxHp);
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}
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}
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/** Current flags object (stun/freeze/sleep/…) */
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get flags() { return this.s.flags; }
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/** Can act at all this tick (not stunned/frozen/sleeping/levitated). */
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get canAct() { return this.alive && this.deployed && !this.hidden && !this.s.flags.stun; }
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hasFlag(k) { return !!this.s.flags[k]; }
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/** Ground unit: enemies that WALK and aren't levitated; ally units standing on a LOW tile. */
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get isFlying() { return this.motion === 'FLY'; }
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get hpRatio() { const mh = this.s.maxHp; return mh > 0 ? this.hp / mh : 0; }
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/** Snapshot status bitmask (UF bits: blocked, stunned, frozen, stealth, skill, shield, invuln, cold, sleep, flying). */
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get statusFlags() { return flagsOf(this); }
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/** Damage type of the unit's normal attack ('phys' | 'arts' | 'true' | 'heal' | 'none'). */
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get dmgType() { return (this.profile && this.profile.dmgType) || (this.def && this.def.dmgType) || 'phys'; }
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/** Displacement weight (= current massLevel incl. `massFlat` buffs). Enemies also carry `lpr` (LP cost) as a plain field. */
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get weight() { return this.s.massLevel; }
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get spMax() { return this.skill ? this.skill.spCost : 0; }
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get sp() { return this.skill ? this.skill.sp : 0; }
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isOp() { return this.kind === 'op'; }
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isEnemy() { return this.side === 'enemy'; }
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isAlly() { return this.side === 'ally'; }
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/** Element gauge capacity: 1000, leaders (enemy rank BOSS) 2000 (official "·我方" burst terms). */
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get gaugeMax() {
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return this.side === 'enemy' && (this.isBoss || (this.def && this.def.rank === 'BOSS')) ? ELEMENT_GAUGE_MAX_LEADER : ELEMENT_GAUGE_MAX;
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}
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/** Element gauge helper */
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elemRatio(el) { return (this.elem[el] ?? 0) / this.gaugeMax; }
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findBuff(key) {
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for (const b of this.buffs) if (b.key === key) return b;
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return null;
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}
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hasBuff(key) { return this.findBuff(key) !== null; }
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toString() { return `${this.kind}#${this.id}(${this.name})`; }
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/** Compact inspection (avoids dumping the whole battle graph in assertion messages / logs). */
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[Symbol.for('nodejs.util.inspect.custom')]() {
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return `Unit<${this.kind}#${this.id} ${this.defId} hp=${Math.round(this.hp)}${this.alive ? '' : ' dead'} @${this.x.toFixed(2)},${this.y.toFixed(2)}>`;
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}
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}
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