Android build v1.1.16

src/modes/iwt2/sim/partyAi.ts

@@ -1,5 +1,5 @@
 import { IWT2_CLASS_METADATA } from '../content/classes'
-import { BULLDROME_BOSS_METADATA } from '../content/bosses'
+import { BULLDROME_BOSS_METADATA, IWT2_BOSS_METADATA } from '../content/bosses'
 import type { Iwt2ArenaState, Iwt2HostileAddState, Iwt2PartyEntityState, Iwt2Vec2 } from './types'
 import {
   addVec2,
@@ -14,6 +14,11 @@ import {
   withFallbackFacing,
 } from './vector'
 
+const CENTER_LEASH_BOSS_IDS = new Set(['great-jaggi', 'khezu'])
+const CENTER_LEASH_START_DISTANCE = 230
+const CENTER_LEASH_WALL_MARGIN = 96
+const CENTER_LEASH_EXTRA_DISTANCE = 36
+
 export function tickPartyMember(
   member: Iwt2PartyEntityState,
   state: Iwt2ArenaState,
@@ -115,12 +120,55 @@ function getPartyDesiredPosition(
   const drift = decisionSecondsRemaining <= 0 ? decisionDrift(member, state.time) : { x: 0, y: 0 }
   const attackTarget = getPriorityAttackTarget(member, state)
   const anchor = attackTarget?.position ?? state.boss.position
+  const centerLeash = getTankCenterLeashPosition(member, state)
+  if (centerLeash) return centerLeash
   return {
     x: anchor.x + member.preferredOffset.x + drift.x,
     y: anchor.y + member.preferredOffset.y + drift.y,
   }
 }
 
+function getTankCenterLeashPosition(
+  member: Iwt2PartyEntityState,
+  state: Iwt2ArenaState,
+): Iwt2Vec2 | null {
+  if (member.aiRole !== 'tank' || !CENTER_LEASH_BOSS_IDS.has(state.boss.bossId)) return null
+
+  const center = arenaCenter(state)
+  const bossCenterDistance = distanceVec2(state.boss.position, center)
+  const nearWall = isBossNearWall(state)
+  if (!nearWall && bossCenterDistance < CENTER_LEASH_START_DISTANCE) return null
+
+  const bossMetadata = IWT2_BOSS_METADATA[state.boss.bossId]
+  const towardCenter = withFallbackFacing(subtractVec2(center, state.boss.position), {
+    x: state.boss.position.x < center.x ? 1 : -1,
+    y: state.boss.position.y < center.y ? 0.35 : -0.35,
+  })
+  const leashDistance = bossMetadata.meleeRange + state.boss.radius + member.radius + CENTER_LEASH_EXTRA_DISTANCE
+  return clampVec2ToArena(
+    addVec2(state.boss.position, scaleVec2(towardCenter, leashDistance)),
+    member.radius,
+    state.bounds,
+  )
+}
+
+function arenaCenter(state: Iwt2ArenaState): Iwt2Vec2 {
+  return {
+    x: state.bounds.width * 0.5,
+    y: state.bounds.height * 0.5,
+  }
+}
+
+function isBossNearWall(state: Iwt2ArenaState): boolean {
+  const margin = state.boss.radius + CENTER_LEASH_WALL_MARGIN
+  return (
+    state.boss.position.x <= margin
+    || state.boss.position.x >= state.bounds.width - margin
+    || state.boss.position.y <= margin
+    || state.boss.position.y >= state.bounds.height - margin
+  )
+}
+
 function getDangerAvoidancePosition(member: Iwt2PartyEntityState, state: Iwt2ArenaState): Iwt2Vec2 | null {
   const boss = state.boss
   const hazardEscape = getHazardAvoidancePosition(member, state)