Release v0.1.2 2026-07-11

src/game/partyBehaviors.ts

@@ -1,5 +1,6 @@
 import { BULL_CHARGE } from "./bossMechanics";
 import { CINDER_BREATH } from "./bosses/cindermaw";
+import { EMBER_MANTIS_SLASH } from "./bosses/emberMantis";
 import { moveToward, pointOutsideCircle, pointOutsideLane, pointToSegmentDistance } from "./geometry";
 import type { BossMotionState, MemberId, PartyMember, WorldPosition } from "./types";
 
@@ -122,6 +123,42 @@ export const avoidBreathBehavior: PartyBehavior = {
   },
 };
 
+export const evadeSlashLanesBehavior: PartyBehavior = {
+  id: "evade-slash-lanes",
+  decide: ({ memberId, current, formationTarget, bossMotion }) => {
+    if (bossMotion.mode !== "mantis_line_telegraph" && bossMotion.mode !== "mantis_cross_telegraph") return null;
+    if (!bossMotion.slashLanes.length) return null;
+    const unsafe = (position: WorldPosition) => bossMotion.slashLanes.some((lane) =>
+      pointToSegmentDistance(position, lane.start, lane.end) < EMBER_MANTIS_SLASH.aiClearance,
+    );
+    if (!unsafe(current) && !unsafe(formationTarget)) return null;
+
+    const origin = unsafe(formationTarget) ? formationTarget : current;
+    const memberOffset = AI_MEMBER_IDS.indexOf(memberId) * (Math.PI / 4);
+    let best = current;
+    let bestScore = Number.NEGATIVE_INFINITY;
+    for (const radius of [2.2, 3.4]) {
+      for (let index = 0; index < 8; index += 1) {
+        const angle = memberOffset + (index / 8) * Math.PI * 2;
+        const candidate = clampToArena([
+          origin[0] + Math.sin(angle) * radius,
+          origin[1] + Math.cos(angle) * radius,
+        ]);
+        const laneDistance = Math.min(...bossMotion.slashLanes.map((lane) =>
+          pointToSegmentDistance(candidate, lane.start, lane.end),
+        ));
+        const travelPenalty = Math.hypot(candidate[0] - current[0], candidate[1] - current[1]) * 0.08;
+        const score = laneDistance - travelPenalty;
+        if (score > bestScore) {
+          best = candidate;
+          bestScore = score;
+        }
+      }
+    }
+    return { target: best, speed: EMBER_MANTIS_SLASH.aiEvadeSpeed };
+  },
+};
+
 export const avoidCircleHazardsBehavior: PartyBehavior = {
   id: "avoid-circle-hazards",
   decide: ({ memberId, current, formationTarget, bossMotion, time }) => {
@@ -143,7 +180,7 @@ export const avoidCircleHazardsBehavior: PartyBehavior = {
 export const maintainFormationBehavior: PartyBehavior = {
   id: "maintain-formation",
   decide: ({ formationTarget, bossMotion, memberId }) => {
-    if (!["holding", "telegraph", "tethering", "venom_cast", "skyfall"].includes(bossMotion.mode)) return null;
+    if (!["holding", "telegraph", "tethering", "venom_cast", "skyfall", "mantis_sidestep", "mantis_recover"].includes(bossMotion.mode)) return null;
     return { target: formationTarget, speed: MOVE_SPEEDS[memberId] };
   },
 };
@@ -152,6 +189,7 @@ export const DEFAULT_PARTY_BEHAVIORS: readonly PartyBehavior[] = [
   breakTetherBehavior,
   stackForPounceBehavior,
   evadeChargeBehavior,
+  evadeSlashLanesBehavior,
   avoidBreathBehavior,
   avoidCircleHazardsBehavior,
   maintainFormationBehavior,