Android build v1.1.16
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Warren H
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import { KHEZU_BOSS_METADATA } from '../content/bosses'
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import type { Iwt2BossTickResult } from './bossAi'
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import type {
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Iwt2ArenaEvent,
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Iwt2ArenaIndicator,
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Iwt2ArenaState,
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Iwt2BossEntityState,
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Iwt2MechanicCircleState,
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Iwt2PartyEntityState,
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} from './types'
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import {
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applyPartyDamageInShape,
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createCircleIndicator,
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createDonutIndicator,
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indicatorPhaseFromAttack,
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} from './mechanics'
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import {
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clampVec2ToArena,
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distanceVec2,
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moveToward,
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scaleVec2,
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subtractVec2,
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withFallbackFacing,
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} from './vector'
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export function tickKhezu(state: Iwt2ArenaState, dt: number): Iwt2BossTickResult {
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const events: Iwt2ArenaEvent[] = []
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let party = state.party
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let boss = {
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...state.boss,
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meleeCooldownRemaining: Math.max(0, state.boss.meleeCooldownRemaining - dt),
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chargeCooldownRemaining: Math.max(0, state.boss.chargeCooldownRemaining - dt),
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fireballCooldownRemaining: Math.max(0, state.boss.fireballCooldownRemaining - dt),
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phaseSecondsRemaining: Math.max(0, state.boss.phaseSecondsRemaining - dt),
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velocity: { x: 0, y: 0 },
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}
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const target = getBossTarget(party)
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if (boss.health <= 0 || !target) return withKhezuIndicators({ boss, party, events })
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if (boss.attackPhase === 'thunderRingWindup') {
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boss = {
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...boss,
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facing: withFallbackFacing(subtractVec2(target.position, boss.position), boss.facing),
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}
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if (boss.phaseSecondsRemaining <= 0) {
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const result = applyThunderRing(party, boss, state.time + dt)
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party = result.party
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events.push(...result.events)
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boss = {
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...boss,
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attackPhase: 'thunderRingRecover',
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phaseSecondsRemaining: 0.45,
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}
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}
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return withKhezuIndicators({ boss, party, events })
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}
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if (boss.attackPhase === 'lightningStrikeWindup') {
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if (boss.phaseSecondsRemaining <= 0) {
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const result = applyLightningStrikes(party, boss, state.time + dt)
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party = result.party
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events.push(...result.events)
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boss = {
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...boss,
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attackPhase: 'lightningStrikeRecover',
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phaseSecondsRemaining: 0.38,
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}
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}
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return withKhezuIndicators({ boss, party, events })
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}
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if (boss.attackPhase === 'thunderRingRecover' || boss.attackPhase === 'lightningStrikeRecover') {
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if (boss.phaseSecondsRemaining <= 0) {
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boss = {
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...boss,
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attackPhase: 'idle',
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mechanicCircles: [],
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phaseSecondsRemaining: 0,
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}
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}
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return withKhezuIndicators({ boss, party, events })
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}
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if (boss.chargeCooldownRemaining <= 0) {
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boss = {
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...boss,
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attackPhase: 'thunderRingWindup',
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chargeCooldownRemaining: KHEZU_BOSS_METADATA.thunderRingCooldown!,
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phaseSecondsRemaining: KHEZU_BOSS_METADATA.thunderRingWindup!,
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velocity: { x: 0, y: 0 },
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}
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return withKhezuIndicators({ boss, party, events })
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}
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if (boss.fireballCooldownRemaining <= 0) {
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boss = {
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...boss,
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attackPhase: 'lightningStrikeWindup',
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fireballCooldownRemaining: KHEZU_BOSS_METADATA.lightningStrikeCooldown!,
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mechanicCircles: createLightningTargets(party),
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phaseSecondsRemaining: KHEZU_BOSS_METADATA.lightningStrikeWindup!,
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velocity: { x: 0, y: 0 },
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}
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return withKhezuIndicators({ boss, party, events })
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}
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const meleeResult = maybeApplyMelee(party, boss, target, state.time + dt)
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party = meleeResult.party
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events.push(...meleeResult.events)
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boss = meleeResult.boss
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if (events.length > 0) return withKhezuIndicators({ boss, party, events })
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const nextPosition = clampVec2ToArena(
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moveToward(boss.position, target.position, KHEZU_BOSS_METADATA.moveSpeed * dt),
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boss.radius,
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state.bounds,
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)
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boss = {
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...boss,
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position: nextPosition,
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velocity: scaleVec2(subtractVec2(nextPosition, boss.position), dt > 0 ? 1 / dt : 0),
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facing: withFallbackFacing(subtractVec2(target.position, nextPosition), boss.facing),
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}
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return withKhezuIndicators({ boss, party, events })
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}
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function createLightningTargets(party: Iwt2PartyEntityState[]): Iwt2MechanicCircleState[] {
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return [...party]
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.filter((member) => member.health > 0)
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.sort((a, b) => (a.health / a.maxHealth) - (b.health / b.maxHealth))
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.slice(0, KHEZU_BOSS_METADATA.lightningStrikeCount!)
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.map((member, index) => ({
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id: `lightning-${index}`,
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position: { ...member.position },
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radius: KHEZU_BOSS_METADATA.lightningStrikeRadius!,
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}))
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}
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function applyThunderRing(
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party: Iwt2PartyEntityState[],
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boss: Iwt2BossEntityState,
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time: number,
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): { party: Iwt2PartyEntityState[], events: Iwt2ArenaEvent[] } {
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const result = applyPartyDamageInShape(party, {
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kind: 'donut',
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position: boss.position,
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innerRadius: KHEZU_BOSS_METADATA.thunderRingInnerRadius!,
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outerRadius: KHEZU_BOSS_METADATA.thunderRingOuterRadius!,
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}, {
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damage: KHEZU_BOSS_METADATA.thunderRingDamage!,
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knockdownSeconds: 0,
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sourceId: boss.id,
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stunSeconds: KHEZU_BOSS_METADATA.thunderRingStunSeconds!,
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time,
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})
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return { party: result.party, events: result.events }
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}
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function applyLightningStrikes(
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party: Iwt2PartyEntityState[],
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boss: Iwt2BossEntityState,
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time: number,
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): { party: Iwt2PartyEntityState[], events: Iwt2ArenaEvent[] } {
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let nextParty = party
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const events: Iwt2ArenaEvent[] = []
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for (const circle of boss.mechanicCircles) {
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const result = applyPartyDamageInShape(nextParty, {
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kind: 'circle',
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position: circle.position,
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radius: circle.radius,
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}, {
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damage: KHEZU_BOSS_METADATA.lightningStrikeDamage!,
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knockdownSeconds: 0,
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sourceId: boss.id,
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stunSeconds: KHEZU_BOSS_METADATA.lightningStrikeStunSeconds!,
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time,
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})
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nextParty = result.party
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events.push(...result.events)
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}
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return { party: nextParty, events }
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}
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function getBossTarget(party: Iwt2PartyEntityState[]): Iwt2PartyEntityState | undefined {
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const livingTank = party.find((member) => member.classId === 'paladin' && member.health > 0)
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if (livingTank) return livingTank
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return party.find((member) => member.health > 0)
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}
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function maybeApplyMelee(
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party: Iwt2PartyEntityState[],
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boss: Iwt2BossEntityState,
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target: Iwt2PartyEntityState,
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time: number,
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): { boss: Iwt2BossEntityState, party: Iwt2PartyEntityState[], events: Iwt2ArenaEvent[] } {
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if (boss.meleeCooldownRemaining > 0) return { boss, party, events: [] }
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if (distanceVec2(boss.position, target.position) > KHEZU_BOSS_METADATA.meleeRange + target.radius) {
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return { boss, party, events: [] }
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}
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const result = applyPartyDamageInShape(party, {
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kind: 'circle',
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position: boss.position,
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radius: KHEZU_BOSS_METADATA.meleeRange,
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}, {
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damage: KHEZU_BOSS_METADATA.meleeDamage,
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sourceId: boss.id,
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time,
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})
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return {
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boss: { ...boss, meleeCooldownRemaining: KHEZU_BOSS_METADATA.meleeCooldown },
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party: result.party,
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events: result.events,
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}
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}
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function withKhezuIndicators(result: Omit<Iwt2BossTickResult, 'indicators'>): Iwt2BossTickResult {
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return {
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...result,
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indicators: createKhezuIndicators(result.boss),
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}
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}
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function createKhezuIndicators(boss: Iwt2BossEntityState): Iwt2ArenaIndicator[] {
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const indicators: Iwt2ArenaIndicator[] = []
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if (boss.attackPhase === 'thunderRingWindup' || boss.attackPhase === 'thunderRingRecover') {
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indicators.push(createDonutIndicator({
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color: '#77d9ff',
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id: `${boss.id}:thunder-ring`,
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innerRadius: KHEZU_BOSS_METADATA.thunderRingInnerRadius!,
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mechanicId: 'khezu-thunder-ring',
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outerRadius: KHEZU_BOSS_METADATA.thunderRingOuterRadius!,
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phase: indicatorPhaseFromAttack(
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boss.attackPhase === 'thunderRingWindup',
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boss.attackPhase === 'thunderRingRecover',
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),
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position: boss.position,
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sourceId: boss.id,
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}))
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}
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if (boss.attackPhase === 'lightningStrikeWindup' || boss.attackPhase === 'lightningStrikeRecover') {
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for (const circle of boss.mechanicCircles) {
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indicators.push(createCircleIndicator({
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color: '#9be8ff',
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id: `${boss.id}:${circle.id}`,
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mechanicId: 'khezu-lightning-strike',
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phase: indicatorPhaseFromAttack(
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boss.attackPhase === 'lightningStrikeWindup',
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boss.attackPhase === 'lightningStrikeRecover',
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),
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position: circle.position,
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radius: circle.radius,
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sourceId: boss.id,
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}))
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}
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}
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return indicators
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}
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